JPS62289249A - Extra-short pulse high voltage impressing type gas purifying apparatus - Google Patents

Abstract

PURPOSE:To carry out denitration, desulfurization and dust collection with a reduced cost by generating pulse corona discharge across a gas passage of exhaust gas and by making a critical value EP in the clearance to be extremely high value. CONSTITUTION:In the titled gas purifying apparatus which removes gaseous contaminating substances such as NOX, SO2 in the industrial exhaust gas of boilers, etc., a group of vertical plate type confronting electrodes 6 positioned at the same distance and a group of corona discharge wires 8 positioned in the middle between said electrodes 6 are provided in a casing 1. And an output extra-short pulse high voltage of a high voltage extra-short pulse power source is made to show such a wave height value Vp that a time concerning peak value Ep of a mean electric field intensity concerning the distance between the corona discharge wires 8 and the confronting electrodes 6 shows the critical value Epo=8d(kV/cm) or more, where (d) is the relative density of gas. In this condition, NO and SO2 are oxidized first, and then brought into contact with absorbing agents to be removed.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The uninvented invention is based on large oxides (hereinafter referred to as NOx) contained in industrial exhaust gas from boilers, sintering machines, etc. ), oxidation of sulfur dioxide (hereinafter referred to as 502), etc. to remove various gaseous pollutants including these.
``Ultra-short pulse high-voltage, pressure-type gas saving device.'' However, the scope of its application is not limited to wide gas purification; it can also be combined with electrostatic precipitators, weighted bag fillers, etc. to perform dust collection at the same time as gas purification, It can also be used to decompose NOx generated in equipment that releases gas, and is generally used to release 11 tons of gas.
It can also be used to effectively liquefy, produce, and decompose specific gas components through chemical reactions.

[Conventional technology] Conventionally, methods used for denitrification and desulfurization of exhaust gas have been used.
・It is a chemical method by Il et al. 300 as C1 for denitrification
1-Touch of adding ammonia to the exhaust gas at a gas temperature above Il! The so-called ammonia catalytic reduction method is used to decompose NOx into nitrogen and moisture, and for desulfurization, 1 ft of milk of lime is made into a mist and dispersed in the exhaust gas 41. 502 is absorbed and removed as sulfite gypsum.The so-called "lime gypsum method" is used for the gypsum.

- Ammonia is added to the exhaust gas in advance, L is irradiated with a high-energy electron beam, and NOx and 502 are converted into solid fine particles of ammonium sulfate and nitrate, which are then removed from the gas 'b1. Beam exhaust gas purification method J was also developed.

Furthermore, the effectiveness of a method of improving this method by applying an electric field to the electron beam irradiation chamber III to increase the reaction speed has been proven to be effective. Furthermore, a method was proposed in which only a corona electrode system consisting of a corona group '1liJ4i and a non-corona opposing electrode was installed in the exhaust gas, and a pulsed high voltage was applied between the two 'if electrodes to perform denitrification and desulfurization. The effectiveness of the device has been demonstrated. However, all of these are extremely difficult to put into practical use, and there are currently 15 methods that have not been successfully put into practical use.

[Problems to be solved by the invention] Chemical methods such as the "ammonia catalytic reduction method" and the "lime-gypsum method" described in section 1-1 have extremely high construction and operating costs, as well as corrosion of the equipment and short lifespan of the catalyst. There is one problem. The "electron beam exhaust gas converting method" can perform denitrification and desulfurization at the same time, does not require a catalyst, and is a completely dry process, so the equipment is simple and maintenance is simple, but equipment and operating costs are high. Both are extremely high and require eight expensive measures to protect against radiation. This method, which applies an electric field to the electron beam irradiation space to promote the denitrification-desulfurization reaction, still basically uses the electron beam, so it is inevitable that the equipment cost will increase. The simplest and most economical method is to install only a corona electrode system in the exhaust gas and periodically apply a short pulsed high voltage between the two electrodes to generate a pulsed corona discharge, which produces pure electricity. This is a method to desulfurize, denitrify, or otherwise purify exhaust gas. However, it is recognized that this is not effective at all with large equipment.
The reality is that there are no plans at all to put this method into practical use.

The present invention overcomes the above-mentioned difficulties and greatly improves the gas purification method using corona discharge using ultra-short pulsed high voltage!
a ; Aim for π to be put to practical use in a.

[P-stage for solving the problem of directivity] The present invention provides at least one corona discharge electrode and at least one other corona discharge electrode facing the corona discharge electrode in a gas containing gaseous pollutants such as NOx and 302. A corona quasi-polar system consisting of two or more unique electrodes is provided with the opposite electrodes as poles, and a pulse is applied between the corona discharge electrode and the other electrodes. In a device that aims at denitrification and desulfurization of gas by applying an extremely short J17 pulse high cardiac pressure, the value of the leakage voltage Vp of the extremely short pulse high voltage is determined as the corona group', it J4 and the temporal peak value BP of the uniform electric field strength over the distance between the opposing TL poles is at least the critical value E p o = 8 d (kV/am)
By selecting 1t to be an extremely high value such that

Here, d is the "relative density" of the gas, which is the density of the gas at the temperature and pressure that is one problem when the density of the gas is 1 at 0111'C and 1 atmosphere.

That is, the present inventor generated a pulsed corona discharge across a gas path of a gas containing NOx, SO2, etc.

E in the gap is at least L ff (1)
Extremely high, exceeding the Epo of (1, &f preferably 1
2d (kV/cal or higher), NO and SO2 are converted to water-soluble NO2 for the first time.
and SO3, a suitable absorbent or absorbing liquid 9 such as water, NaOH, Na2CO3, Ca (OH)
We have found that 2°1t can be effectively removed from gas by catalytic absorption of 2°CaCO3 in depleted solution or suspended water. In this case, the absorption liquid such as NO2)SO3 is most effective and suitable if it is allowed to flow down in the form of a liquid film on the surface of the first counter electrode.Also, the NO2 generated by the oxidation of No is even more extremely short-lived. The decomposition of NO2 is significantly accelerated by adding ammonia equivalent to NOx to the gas in advance. It was also found that SO2 and SO3 are converted and fixed into solid fine particles by adding ammonia.Also, when NOx and SO2 are present in the gas, when using n pulse corona, NOx is first fermented. 0
It was found that the oxidation of 502 occurred first, followed by the oxidation of 502. It is also known that the wood tJ1 vapor contained in the gas is very effectively oxidized by the pulsed corona discharge to solid mercury oxide, and also to soluble mercury chloride in the presence of HCL or the like.

In addition, in the discharge chemical gas purification reactions such as oxidation of No, decomposition of N02, oxidation of S02, oxidation and chlorination of wood and silver dust according to the present invention, the peak value E of the gap average electric field strength in the gas passage is determined by the above (1). The higher the equation is raised beyond the criticality (IEpo), the smaller the radius of corona radiation, the radius of the polar curve, or the more sharp protrusions are added to make pulsed corona radiation more active, the more effective it becomes. It was also found that this was done.

J, the wave height of the extremely high average electric field intensity (#1IEp exceeding Epo in equation (1)) that should be applied in order to form the corona space of the gas passage in E without generating sparks. It is necessary to make the width extremely short. In this case, the pulse 111? It has been found through experiments that it is necessary to make Tp extremely short, typically 1000n5 or less, preferably 500ns or less.

As the corona electrode system used for non-emission III, a two-electrode system consisting of two types of independent electrodes, the corona discharge electrode and the counter electrode, which are directly opposed to each other across a gas passage, may be used. A three-electrode system in which a third electrode is further insulated nearby may be used, and the corona radiation pole used in the present invention may be linear, φ square wire, barbed wire, or rod with protrusions.・Strip shape ◆Strip shape with protrusions, etc. Any suitable shape/structure aφ material may be used, but! As mentioned above, the more active the corona radiation occurs, the more vigorous the discharge chemical action will be, so it is generally preferable. Furthermore, this corona discharge electrode may be used by being fixed to a suitable support frame, or may be used by forming a long wooden corona transmission line.

When the E2 two-electrode system is used as the electrode configuration of the present invention,
As the counter electrode, a corona discharge electrode as shown in L may be used, or a non-corona electrode with a large radius of curvature, such as a root-like, wire-mesh, Φ cylindrical shape, etc., may be used, or a three-electrode system may be used. In some cases, it is preferable to use a non-corona II electrode as described above as the counter electrode, and either a corona radiation director electrode or a non-corona electrode can be used as the third electrode.

When using a two-electrode system, the ultra-short pulsed high voltage may be applied directly between the corona discharge electrode and the counter electrode, but in advance, an auxiliary high voltage (hereinafter referred to as If a high bias voltage (called ct pressure) is added and then the J4i short pulse high voltage is applied via a coupling capacitor, the wave-to-wave value voltage can be reduced by the amount of the bias high voltage. The J4i short pulse is suitable for generating an extremely short high voltage pulse power supply at a low cost.

When using a one-way polar system, apply the bias high voltage as described above between the two opposite electrodes, such that the polarity of the former with respect to the latter is the same as the polarity of the corona discharge electrode at the pulsed high voltage. Then, the pulsed high voltage is applied directly or via a coupling capacitor between the corona force -11fJ4i and the third electrode.

The bias high voltage used in the Unlike the case of using bias DC high pressure, the use of ion current flowing across the gas passage space can be significantly reduced, reducing the power consumption required for gas purification such as denitrification and desulfurization. You can save money.

1: In the polar system and three-electrode system, when the counter electrode is Jl corona +1 as the pole, the polarity of the first corona discharge electrode when applying ultra-short pulse high heart pressure is positive or negative. Either method may be used, but the pulsed corona of IE is streamer-like and extends to bridge the gas space between the corona discharge electrode and the other electrode, causing gas purification reactions such as night nitric acid and lll [etc. The chemically active species responsible for the reaction are generated throughout the space, and the reaction can be completed within a relatively small volume of 2 volumes or a short residence time, allowing the equipment to be miniaturized. Therefore, in order to carry out the present invention solely for the purpose of gas purification such as gas denitrification and self-desulfurization, it is better to use positive pulse corona discharge to reduce equipment costs. In particular, the rate of oxidation of 502 to SO3 is extremely slow with a negative pulse corona, so it is necessary to use a positive pulse corona.

However, the corona electrode system of the present invention can also be used as an electrostatic precipitator, and the corona discharge electrode can be used as an electric precipitator. It is also possible to collect dust at the same time as gas purification such as de-sulfurization of exhaust gas by using the opposite electrode as its dust collection electrode, and in that case, the corona discharge electrode is used as its dust collection electrode. As ultra-short pulse height '1il
It is preferable to apply E to generate a negative pulsed corona discharge. This is because, when using IF pulse corona discharge, the discharge has two rona radiation poles and 9! Since the gap between the dust electrodes is bridged in the form of a streamer and positive and negative ions are distributed throughout the gap space, the dust particles cannot be charged, which would require the bombardment of only F1 polar ions, and the dust collection This is because the effect is lost. In contrast, the negative pulse
When a core discharge is used, the discharge is localized near the corona discharge electrode.

IE negative ions are formed only in this region, but only negative ion flow exists in other regions, so that dust can be effectively collected during charging. In this case, when the present invention is carried out using a two-electrode electrostatic precipitator consisting of a normal discharge electrode and a dust collecting electrode, the electrode configuration of the corona electrode system must be changed! 2 It becomes a polar system, and the corona radiation I
It is preferable to apply a DC high quasi-voltage that makes the dazzling pole negative as a bias DC high voltage, and to this, apply the extremely short pulse high voltage through a coupling capacitor with a polarity that makes the discharge electrode negative. The present invention can also be implemented as a three-electrode type electrostatic precipitator in which a third electrode consisting of a non-corona electrode or a corona electrode is provided in the vicinity of the corona discharge electrode in addition to the corona discharge electrode @ collection electrode. A DC high voltage is applied between the third electrode and the dust collection electrode with the former being negative, and the extremely short pulse high voltage is applied between the discharge electrode and the second electrode with the former being negative. do.

The J4i short pulse high voltage used in the present invention can be used by configuring the corona electrode system as a long transmission line (hereinafter referred to as a corona transmission line), and a strong corona discharge can be generated over the entire length while propagating F as a traveling wave. The energy possessed by the J4i short pulse high voltage can be used most effectively for the formation of corona discharge, and therefore for gas purification reactions such as denitrification and desulfurization. In this case, the propagation speed of the pulse voltage is approximately the speed of light CO, so when the width of the pulse voltage is T, its geometric length is Lp = CoT, so in the case of an open-ended corona transmission line, its length is SaLo is (+/2) LP
and times or longer LO≧(1/2)L
p (2) is the condition for the pulse voltage to behave as a traveling wave, and on the contrary, L6
When c((+/2) L P, the corona electrode system becomes a lumped constant load consisting of the quasi-electrode capacitance and the equivalent parallel resistance of the corona discharge.

When carrying out the embodiment v+ (hereinafter referred to as the traveling wave type) of the present invention using this traveling wave with the T' electrode system, a corona electrode system or a two-electrode electrostatic precipitator, it is necessary to use a long linear wave. It is preferable to insulate the corona radiation poles between a pair of parallel grounded plate-like opposing electrodes (or electrodes) in a zigzag pattern with a line spacing of about 5 to 30 cm.

In this case, a pair of grounded opposing 'ilt poles (
The dust collector J4i) and one long corona top pole disposed in the middle form a set of one long corona transmission line. In this case, the corona discharge electrode is preferably mounted on a suitable support frame that is insulated from the ground.

In addition, when implementing the traveling wave type with a three-electrode corona electrode system or a three-electrode type one-electrode air dust collector, at least one of the corona radiation pole or the first electrode is
A pair of plate-shaped counter electrodes (
A collection of stories! It is preferable to insulate the SA E electrode and the corona discharge electrode with a spacing of 2 to loCm in the middle of the corona discharge electrode in a zigzag pattern.
The third electrode, the corona discharge electrode, and both opposing electrodes (or dust collecting electrodes) form three (or four) parallel corona transmission lines. In this case, the fifth electrode is made into a gridiron shape and also serves as a support frame, and the +ij
(It is preferable to arrange the corona discharge electrodes 1-1 insulated from the support frame in a zigzag pattern, meandering as if running in the middle of the 114t, and the ultra-short pulse high voltage described in Proceeds as a wave, and on the way, corona radiation '1
When performing a cane, the wave height portion of the extremely short pulse high voltage is gradually lost due to the energy loss associated with it, and after reaching the distance, the wave height portion is completely lost and corona discharge no longer occurs. Abilities disappear. This distance is 1 depending on the conditions, but it is about 300 m in the case of a negative pulse voltage and about 3 m = 10 m in the case of a positive pulse voltage that consumes energy that generates a strong streamer-like corona radiation Ift. By the way, even after the wave height disappears, the extremely short pulse crystal type JIτ still retains sufficient energy, and in order to utilize this for the 41 effect, it is necessary to use some method to regain the wave height (JIτ). (Hereinafter, this is abbreviated as pulse peaking) By increasing the corona starting voltage fIl'i and converting most of the energy possessed by the pulse and Oi voltages into corona discharge energy, the power efficiency of the condensing method is increased and the rotation cost is reduced. L that lowers the top is extremely +S. One way to implement pulse peaking is to increase the surging impedance of the corona transmission line, zo=Jr7 (3), as it goes toward the current.To do this, the inductance L per unit length of the corona transmission line is Either increase the line-to-line quietness per medium length of the corona transmission line, or make it smaller as the line-to-line quietness per medium length of the corona transmission line approaches F. In the middle of the long corona discharge wire, there are several inductors/sufu.
(abbreviated as "peaking coil") and increase its inductance value as it goes downstream,
The corona υ is to open the end of the transmission line (at this time, Zo becomes infinite and the a-line wave is totally reflected), and the corona discharge line is constructed by integrating several radiation lines in parallel JIL. The number of parallel wires was reduced at several points along the way, and it was finally reduced to one! You can also open the end of the line with ;, and in this case, each time C in the above is set, Zo is set to L. Alternatively, the corona discharge wire is made of a thin strip-shaped conductor and placed in parallel with the opposing electrode, so that the corona discharge is generated at its sharp edge, and the li is gradually narrowed from the input end to the terminal end. Go and perform electrostatic response to the counter electrode! 1) C
If +r+ is set to zero at the end, then J( may be used as an open end. From now on, such a corona emitting electrode will be called a peaking centrifugal rod. Hereafter, the other pulse beak/g is j!i This can also be done by compressing the 111 of the pulse in a positive way (this is called pulse compression).In the corona transmission line of the present invention, even if pulse peaking is performed by applying pulse compression, Needless to say, it's a good thing.

The time required for gas purification in the denitrification/desulfurization event is approximately inversely proportional to the frequency fp of the applied ultrashort pulse high voltage.

The higher the value of f2, the smaller the A21 becomes.
El! When applying If to χ, it is preferable to select a practical hfp of 50 Hz or higher, preferably 250 Hz or higher.

Any suitable high-voltage ultra-short pulse power source may be used to generate such extremely short-width ultra-short pulse high voltage, but generally an energy storage element (also called a pulse waveform shaping element) is used. A capacitive energy storage such as a capacitor, a coaxial cable, or an LC ladder F-type circuit in which multiple capacitors and inductances are connected in a ladder F-type circuit is used as a capacitor, and this is charged with a direct wave high pressure. Then, fix this to the spark gear.

A rotating spark gap or a high current switch 7I such as a water outlet 7; It is preferable to use a type that forms cardiac pressure (referred to as volume 'j Jb JIS 'rj). But energy Xi Ja 6.
1 (Use inductance as
eM Sui-7,000, Kfc instant release, this n'r +
A type in which the pulse high quasi-pressure appearing at the J inductance ll14 end is applied directly to the negative mulberry of the ungenerated I5+ via a coupling capacitor (referred to as an inductance storage type).
*: Il accumulation type high 11: When using an IM constant spark gear with a pole N pulse as a source, the capacitive energy of a capacitor etc. is accumulated, and during the charging process of It is also possible to use a rllllll type spark gap that causes the low/E gap to self-destruct when the voltage exceeds the spark voltage of the gap.
If you use three points that make 1, l jade and chi, -1 at various times
1. By applying a trigger mm pulse voltage tj to the trigger electrode, a spark can be generated and the switch n; river can be expressed. Such an external trigger type 1/4 constant spark switch also triggers the mm laser beam at the required time. It is possible to make a spark '· into a pole (it can also be formed by irradiating it, emitting fire/C at the moment of the pair),
By using such an external trigger type fixed spark switch, rotating spark switch, water leakage thyratron, etc. as the terminal of a high-speed switch, it is possible to convert the energy storage element into a half-wave rectifier by using an AC high voltage rather than a direct wave high voltage. charge via
The high-speed switch is turned on only at the moment when the AC high voltage reaches zero voltage (near h) after charging is completed, or during the half cycle when the extreme pressure is reversed and the wave rectifier blocks it. When doing so, it is possible to prevent the generation of rush current from the 1rt source to the load at this moment, and as an inherent advantage of AC charging, charging loss can be greatly reduced, and the power efficiency of high voltage ultra-short pulse power sources can be greatly improved. ;can.

Next, when applying the ultrashort pulse high voltage of the present invention to an ordinary corona '1 dazzling pole system that is not a corona transmission line, it is necessary to consider that the corona electrode system is composed of a concentrated parallel high resistance due to interelectrode electrostatic capacity and corona loss. It behaves as a constant load, and this capacity knee, the electrostatic field of the i-6 voltage ultra-short pulse TL source, its inductance, the switch electronics, the tA electric whale and the corona 71
Due to the inductance of the feeder circuit, a 5X1 frequency CI!! vibration is generated,
Spark voltage drops significantly.

Therefore, in order to prevent this coupled oscillation from occurring, reduce the spark voltage, and stably achieve Ep higher than Epo in equation (1) in the intergas gap, it is necessary to apply a pulse voltage geometry between the pulse power source and the corona electrode system. A long transmission line, such as an Ichikawa coaxial cable, with a length of '7' or more is inserted, and -41 pulses/voltages are made into orthogonal waves and propagated on this line.
-1 It is preferable to separate the circuit multiphase interference on the power supply side and the load side by applying the voltage to the corona electrode system at its terminal end.Hereinafter, such a transmission line will be referred to as a separation transmission line.

This separation transmission line prevents the above-mentioned coupled rolling when the corona yarn used in the present invention is a lumped constant load, and allows the extremely short pulse high voltage wave to be applied to the load as it is. The use of such a separation transmission line is also one of the 4V characteristics of the present invention.
In this case, when a pulse waveform shaping capacitor is used as a capacitive energy crystal, its charging voltage is discharged to the input surge impedance (consisting of pure resistance) of the isolation transmission line via switch electrons. The CR-M9 waveform generated at that time propagates as a direct wave on the transmission line at a speed v=x7J. Therefore, separation 1] To achieve the target, the line length Ls is the pulse width T (ns).

There is a requirement that Ls≧VT (4). We will now use a high-voltage coaxial cable as the separation transmission line, and the orthogonal wave propagation velocity V (
1') (nt V= 0.2 wins, when T=500ns, Ls≧100m, T=
When the time is 1000 ns, it is necessary to satisfy Ls≧200 m.

[Function] When a high If field Ep higher than Epo of formula (1) with #″IIj: of the present invention is formed between the electrodes of the corona electrode system for a short time, 41 electrons generated in the corona discharge is -f
The 02.02. H2O
ff: Collisions with molecules of ↑2, OH planal, which causes gas purification reactions such as desulfurization and 1, 0,03.
Chemically active species such as excited acid 7 (;

2, SO2 is S03. Mercury is immediately oxidized to its oxide (^1) and can be easily removed from the gas with an aqueous solution of a suitable absorbent.Additives such as ammonia gas in the case of NO or SO2 can also be added to the gas. Adding hydrogen chloride gas, etc. to air (mercury, mercury) decomposes most of the NO2, for example, and combines SO2 with NH3 due to the discharge chemical action of '1tcr-, which provides 1-2 strong energy. It is converted into solid ammonium sulfate fine particles and fixed, and mercury vapor is converted into solid ammonium sulfate particles. Since it can be converted into a J compound, it is possible to completely remove pollutants such as NOx, SO2) and mercury vapor from the gas. In other words, the present invention has extremely high gas purification effects such as denitrification and desulfurization, and the internal mechanism of action. By accelerating the energy and making it hotter, we were able to go beyond the conventional barriers and dramatically improve the speed and yield of gas conversion reactions and discharge chemical reactions, including denitrification and desulfurization reactions. There is a particular reason.

[Example] Part 11a is a gas purification device using unreleased II, especially for exhaust gas 1.
A vertical cross-sectional view of an embodiment of a device that can be used as a nitrification/desulfurization device, and FIG. 2 is a cross-sectional view thereof. l is NOx, S.

2) Population of gas included 2.11 Output of gas after desulfurization [13,
Hopper 4. Contact J'I with dust outlet 5! ! The casing is made of polished metal. A group of vertically descending plate-shaped counter electrodes 6, 6'' which are grounded at equal intervals are disposed inside the casing, and an insulating structure is provided between the casing and the counter electrode group, and supported by a rectangular metal support frame group 7. The linear corona discharge electrode group that has been
On the other hand, I/J tube! It is supported by a metal support 12 that penetrates through 1 and is insulated from the ground. One of the pillars 12 is connected to the bias direct current I of the output voltage vb via a changeover switch 13 and, in this example, via an occlusion inductance 14.
are connected to the positive output terminals of the high-voltage power supply 15, and further connected to the coupling capacitor 16. It is connected via a high-voltage coaxial cable 17 to the positive output terminal -F of an extremely short high-voltage pulse 'IIt source 18. Extremely short pulse height' generated by this pulse power source 18
The quasi-voltage has a pulse upper width Tp of 500 ns or more, a sufficiently large peak value Vp, and - the above bias voltage vb.
and 'T' haze Louis wave height (/l1ti pressure (Vp+Vb
) is sufficiently larger than Epo obtained by equation (1).
By adding p, the ρ condition of the present invention can be fully described. In addition, for example 7, 1 cough corona radiation electrode group 8
The corona electrode system consisting of the counter electrode group 6.6' forms a lumped constant circuit, and therefore the high voltage coaxial cable 1
Line 7 also serves as the separated river transmission line mentioned above.

That is, the length Ls of the coaxial cable 17 is increased by an amount that satisfies equation (4). If the changeover switch 13 is now turned to the left, the bias DC high voltage core source 15 is disconnected, and the output voltage of the J4i short 1, 6-voltage pulse 'Itt source 18 is directly applied to the corona discharge electrode group 7 without going through the coupling capacitor 16. and the opposite electrode group 6°6″. 20 is an ammonia container, and ammonia gas is blown into the dust 23 from a nozzle 22 through an injection pipe 21. The gas containing NOx and SO2 enters from the inlet 2, and after mixing with the total amount of NOx and 502 blown in from the nozzle 22 and ammonia gas, which is chemically equivalent, the gas contains the corona discharge electrode group 7 and the counter electrode jT 6. , 6°, flows in the F direction through the gas passage 19, reaching outlet ++ 3, from which it is guided to a suitable dust collector for removing ammonium sulfate fine particles, and after removing the ammonium sulfate fine particles, it is discharged to the stack. . By applying the above-mentioned extremely short pulse high voltage, the corona is released '+ll J4i i
A strong streamer-shaped positive corona bJl electric current bridging the gas passage 19 is generated from a toward the opposing electrode group 6.6°, and due to its strong discharge chemical action, NOx is generated in the presence of ammonia. Most of it decomposes into N2 and N20,
SO2 is oxidized to 303, and then combines with NH3 to form solid particles of ammonium sulfate. A part of it falls into the hopper 4 below and accumulates there, and is discharged to the outside through the dust discharge [15]. The remaining fine ammonium sulfate particles are carried along with the gas, reach the gas outlet 3, and are guided outside.

The high-voltage coaxial cable 17 has a total length of L5Qm and serves as the aforementioned separate transmission line, and the propagation speed of the pulse voltage at 1- is 0.25ins, pulse +I+
50.

ns, and therefore satisfies the condition of equation (4) as a separate river transmission line.As a result, the corona electrode system in this example has a capacity of -1 for a pulse voltage of III 500 ns.
Despite being a lumped constant load, the J4i'JXj pulse high voltage propagating to the cable causes a corona discharge with almost the same waveform. 1tiJ4iJ facing Ma8! '
A pulse of polarity 'lF! applied during f6.6° is reflected to the zeroth order and rotates through the cable 171-. :l+- returns to the pulse 'Ili source, and repeats the reflection again.

<Ij L Since the steep tl-reflection portion of the J4I short pulse high voltage contains high high frequency components, the rll volume reflected from the corona electrode system, which is a capacitive lumped constant load, is approximately '.
It acts as pikR, and therefore only this portion has its polarity reversed, and one reflected positive pulse wave contains an extremely short whisker-like negative pulse portion only in that portion. 24 is a type for charge leakage, and IA prevents direct mail from accumulating on the core wire of the cable.

In this example, 7/Monia is 1) replaced with 1 direction/r: L pole 6° 6' no 1-force, water and Na0H-Na are used as the absorbing liquid.
Isn't there a 1 fl liquid of wood such as 2C03/CaOH-CaCO3? It is also possible to supply water and allow it to flow along the 6.6° surface to form a liquid film, which absorbs generated oxides such as NO2 and SO3. A high gas purification effect can be achieved.

In the 31st and 4th embodiments, the corona electrode system is J*#! in the 11th and 214th embodiments. Q'i who slept at Kenong 1
1 is a longitudinal cross-sectional view of a compact exhaust gas denitrification/defi-fi device according to the present invention, which is configured with only an r+ cylindrical lamp pole 25 and a single linear corona discharge electrode 8 insulated over its axis. The names and machine parts of the elements numbered 2 through 17 in Figure 1 are the same as those of the elements with the same numbers in Figures 1 and 2. The ammonia gas container 20, the same pipe 21, and the injection nozzle 22 (not shown) are filled with NOx, S introduced from the gas pipe 12 after adding ammonia gas.
The exhaust gas containing O2 is discharged through the gas passage 19 inside the cylindrical counter electrode 25, which also serves as a casing, through a corona discharge.
The denitrification and desulfurization reactions are completed by the powerful discharge chemistry of the positive pulse-like streb-corona discharge that occurs from i8 to i25, and the gas is discharged to the outside from the gas outlet o13. In this case as well, instead of injecting ammonia, a liquid film of an absorption liquid of NO2, 5031 reaction products may be formed on the inner wall of the cylindrical counter electrode 25, and these reaction products may be absorbed by this liquid film. Not even.

:fS4 figure shows the support frame 7 in the embodiments of FIGS. 1 and 2.
was removed, and the linear corona discharge electrode group 8 was insulated and supported on the F side by an upper support force of 1'26.
This is an embodiment of the present invention in which the lower blade is constructed by internally tensioning the dome water f support conductor 28 which is insulated and supported by the dome support insulator 10 via an insulator 29.

The names and functions of other numbered elements in the IA are the same as those of the numbered elements in FIGS. 1 and 2.

Also, all other ffJs in Figures 1 and 2
(except for 7) are present in this example as well, but are omitted and not depicted.While Figures 1 and 2 use the corona electrode system as a lumped constant circuit, in this example 17
A positive ultra-short pulse crystal type honey with a steeper slope and a shorter length of 111 is superimposed on a bias DC high voltage of 1, or used as it is, and the ultra-short pulse high voltage is used as a traveling wave. The place has its own characteristics. In other words, selector switch 1
The wave front of the ultra-short pulse high voltage that penetrated into the casing l from the column 12 through the support conductor 27 of the F part is distributed to all the linear corona discharge electrode groups 8 with a length of approximately 6 m.
Proceed downward in the direction of arrow 30. During that time, a strong streamer-like positive corona discharge is generated toward the backward electrode J16, 6°, and at that time, the energy is rapidly lost and the wave height is lost, so the corona generation ability is lost after about 3 mJ. However, further ama travels to the lower end of the open state supported by the insulator 29, where the pulsed high voltage is totally reflected with the same polarity, and the single wave and the reflected wave overlap, and the peak value approximately doubles. Hold on.

Causes peaking. As a result, the pulse generation ability is recovered again, and one reflected wave travels straight toward the L side, while generating a streamer-like positive corona discharge with a force of about 3 m.

As a result, each corona emitting pole with a total length of 6 m generates a strong positive corona emitting center over its entire length, and effectively performs denitrification and desulfurization.

When using a pulsed high voltage as a traveling wave in this way,
The attenuation of the wave height due to iF corona release is significant.

It is difficult to open the bound end and use peaking together.
It is lacking. Even so, it is not beneficial to make the corona transmission line too long, and unless the total length is kept to about 6 to 10 m at most, there will be a portion in the middle of the corona radiation where no corona discharge will occur. Therefore, in order to process a large amount of gas, there is no choice but to increase the number of parallel 7-polarity systems.
If necessary, apply 9 L+ to the casing L to 1-force and connect the same N4 crushed corona electrode system to this part of the water support conductor 27 in the E section.
It becomes necessary to arrange the insulators in a symmetrical inverted arrangement with a common structure, and to lengthen the residence time.Of course, in this case,
1 must be provided on the side wall of the casing l, and in this example, if the output voltage of the bias DC high voltage source and the output voltage of the Vj short high voltage pulse 'If source are negative polarities, each corona radiation
Since the length of the It line 8 is 6 m, and the attenuation associated with the corona discharge during the propagation of the negative pulse voltage on the line is much less.

The corona electrode system works as a lumped constant circuit, and the three high-II cables 17 (not shown) used there must be sufficiently long to serve as a separation transmission line. At this time, the broadcast pole group 8 has an extremely short pulse superimposed on the bias DC high voltage, H
'7i' city pressure is applied in the same waveform to perform denitrification and desulfurization, and at the same time, the dust contained in the exhaust gas and generated ammonium sulfate particles are loaded and collected by electrostatic precipitate action to the opposite 7Ii pole group 6°6' 1. to be collected. When the switch 13 is turned to the left, a negative extremely short pulse high voltage is directly applied to the corona electrode system, which not only generates a negative corona discharge but also charges the interelectrode capacitance V of the corona electrode system. 'Il forms a storm electric field, which also causes electrostatic precipitation. (jjl, In this case, negative ions move from the corona discharge region near the corona discharge electrode toward the counter electrode, producing a negative ion current, and the charge stored in the interelectrode capacitance is discharged.) As a result, the voltage at the corona discharge electrode 8 exhibits CR attenuation, resulting in a sawtooth wave with a steep ultra-short pulse voltage superimposed on the top.Furthermore, if the cable 17 is shortened or omitted, the voltage waveform of the corona discharge electrode will change. The Hani-i sawtooth wave is superimposed on the high-frequency damped oscillation due to the fast-forming oscillation mentioned above at the top of the wave.

FIG. 5 shows a group of grounded opposing electrodes 6, 6° facing each other with a long linear corona discharge electrode 8 whose total length LO satisfies the condition of equation (2) using a negative extremely short pulsed high voltage. This is a cross-sectional view of the exhaust gas denitrification/desulfurization equipment according to the present invention, which is a corona transmission line stretched in a zigzag shape in the middle, and has an open end to form a corona transmission line, and a negative corona discharge is performed while a pulse voltage is propagated as a traveling wave. In this example, this device also serves as an electrostatic precipitator.In Figure 0, a group of vertically opposed electrodes 6,6° are grounded inside the casing l! I! It also serves as the beginning,
A 3° insulator tube lower insulator 29 is attached to an insulated metal support frame 7. E
The linear corona late electrode group 8, which is suspended and fixed via an insulator 32, is connected at the intersection by a peaking coil 33.1 which also serves as a lower connection conductor, and a peaking coil 34 which also serves as a partial connection conductor. A long zigzag-shaped corona transmission line 35 with an open end is formed, and the discharge of the electrostatic precipitator is
It also serves as a pole.

A large number of corona transmission line groups 35 are arranged in parallel between the opposing electrodes, and a distribution common conducting line 37 is connected to the corona transmission line group 35 on the L side of the input end 36. In this example, the cold current inductance 14 is connected to the vJ switch 13 via the insulator pipe 38.
is connected to the negative output terminal f of the bias DC high-voltage power supply 15 via the coupling capacitor 16 and the high-voltage coaxial cable 17, and is connected to the negative output terminal f of the high-voltage ultra-short pulse power supply 18 (not shown at 1'4). Connected to the output end. As a result, a negative DC bias high voltage is constantly applied to the corona transmission line 35, and a negative J4i short pulse high voltage passes through the insulator tube 38 and enters the inside of the casing l as a traveling wave, and the common conductor 37 is applied to the input end 36 of each corona transmission line 35, and a negative corona discharge is generated along the entire length of the line 35 in a zigzag manner in the direction of the arrow 39. After adding NO, enter into the casing l from population 2.
x, the exhaust gas containing SO2 is denitrified and deflowed, and at this time, the negative ions generated by the negative corona discharge collide with the dust suspended in the gas and negatively charge it as a booster, so that the dust Separated from gas by Coulomb force and serves as a counter electrode J! ! Collected on the surface of J4i group 6.6°.

At this time, 502 is oxidized to SO3, and ammonium sulfate fine particles generated by combining with NH3 are also 6,6
Collected on the surface of °. Therefore, the '11! pole group 6,
The dust layer collected by applying a mechanical punch with a hammer device 2ffi40 at 6' falls downward and is received in the hopper 4. In this case, the ammonium sulfate particles have an extremely fine particle size and tend to accumulate on the corona discharge electrode group 8, suppressing the corona discharge, so a separate hammering device 41 is used to
The support frame 7 of 8 is hammered and removed. NOx, S
The O2 and clean gas removed over the dust are led directly to the stack. Compared to positive polarity traveling wave pulse high voltage, negative polarity traveling wave pulse high voltage has a long streamer that connects between the electrodes.
corona discharge does not occur, and corona discharge is
f! limited to the region near the poles. Therefore, the gas passage is filled only with medium-polarity negative ions flowing from the corona discharge region toward the opposite '1ttJ4+, and the entire gas gap has the effect of eliminating particle charges, like the streamer corona in the city. ■: Negative lJ4 is rarely filled with polar ions.As a result, in negative corona discharge, the load caused by negative ion bombardment of dust particles becomes nf in almost the entire gas passage, and '+1f air dust collection effect occurs. manifest.

That is, in order for the denitrification/desulfurization apparatus according to the present invention to also serve as an electrostatic precipitator, it is essential to use a negative 441 short pulse high voltage. Shigashi 1. As mentioned above, since the negative corona is localized only in the vicinity of the corona discharge area, denitrification and desulfurization are performed only within that area, and the space utilization efficiency is high, so a large space and long residence time are required. (2) Also, the amount due to the localization of the corona.

Corona discharge electrode? Less energy consumption per Ii length
The loss of the wave height of ultra-short pulse high voltage due to corona discharge is much smaller than that of one pulse.In other words, the effective length of the corona transmission line J, which is capable of corona discharge Mf, is longer. Become.

However, the characteristics of 1) and (2) are that the large-volume tank air collection J1 can perform denitrification and desulfurization! It is rather convenient to perform the peaking in an apparatus; of course, in this case, it is necessary to open the terminal end and perform peaking, as is the case when using the extremely short pulse high quasi-pressure of j[.

In this example, when the 9J Fl switch 13 is turned on to the left, the negative bias DC high voltage power supply 15 is disconnected, and the negative extremely short pulse high voltage is directly applied to each roller from the cable 17 via the distribution common conductor 37. It is applied to the transmission line 35, and the F is propagated as a traveling wave pulse high voltage. In this case, if the peak value of the pulse height (1π pressure) is made sufficiently high, a strong negative corona discharge will be generated and the denitrification and desulfurization effects will be exhibited. In addition, for the reasons already mentioned, the voltage of the corona discharge electrode 8 is caused by CRM decay, resulting in a negative sawtooth shape l[ll voltage with a steep pulse voltage at the top of the wave, or a high-wave damped oscillation (by shortening the cable I7, In this example, the lower peaking coil The inductance value of the peaking coil 34 in the E part is larger than the inductance f4 of the pulse voltage 33, and thereby the surge impedance of the transmission line at the insertion point is successively F-distributed to perform peaking of the pulse voltage. As a result, the pulse height part is gradually lost due to the corona discharge during propagation, and it is possible to prevent the corona discharge from weakening. Such peaking can also be performed in other ways as shown below.

That is, FIG. 6(a) shows a linear corona radiation line in which a plurality of corona transmission lines 35 are connected in parallel in the embodiment of FIG.
LF rod 8 groups (hereinafter referred to as stages) are further connected in series! t
t continuously, and its parallel corona discharge contact is lIm'i
The peaking of the pulse voltage is achieved by decreasing the surge impedance of the transmission line. ]-11 determine 1-lower insulator 32.29
The second stage 45 consists of three linear corona discharge electrodes 8 connected in parallel and fixed in tension on a first water support conductor 43 and 44 insulated and supported by the same upper and lower wooden supports Conductor 43
°, 44', two parallel-connected linear corona discharge electrodes 8° The third f46 consists of one linear corona discharge electrode 8'', which is stretched and fixed to an insulator 32.29 by a person. , water f by connecting conductors 33' and 34° at the lower and 1 ends, respectively.
Support conductors 44 and 44゛, and 43° and corona discharge electrode 8''
#: By connecting the ends, each stage of 42, 45, and 46 is connected in series, and the surge impedance increases from 36 to the end 47 in three stages. A transmission line 35 is formed. As a result, sufficient peaking of the orthogonal wave pulse voltage with the wave height portion missing due to the corona discharge is performed, and a uniform and vigorous negative corona discharge is generated over the entire length of the corona transmission line. The names and functions of elements numbered other than 1-2 in the figure are shown in FIG.

The second factor is the same as that of the 514th element with the same number. However, the content of ammonia is 3120. Injection pipe 2! .

Tanjin nozzle 22. ! /] s switch 13 connects to the occlusion 7 guk dance 14. Bias DC high voltage power supply 15. Binding Co/Denocer16. High voltage coaxial cable 17. The high-voltage ultra-short pulse power supply 18 is omitted and is not depicted in this figure.

Fig. 6(b) shows that instead of performing peaking by successively reducing the number of linear corona discharge electrodes in Fig. 6(a), Ill of the corona discharge electrodes 8a and 8a' is reduced from the H direction to the D direction. By doing this, the static center 1 with respect to these opposing electrodes 6.6°
However, peaking is performed by reducing j- and continuously increasing the surge impedance in the direction of do.The method in this example is particularly effective when applying a +1° ultra-short pulse high voltage. It is suitable for those who do υ. Such corona discharge electrodes 8a and 8a'' are called peak discharge electrodes.

The names and functions of fCJs with numbers other than 8a and 8a' in IA are the same as those of the elements with the same numbers in FIG. I
E bias DC high voltage power supply 15. The positive high-voltage ultra-short pulse power supply 18 and the high-voltage coaxial cable 17 are omitted and not shown.

No. 7I4 is a vertical cross-sectional view of the present embodiment of No. 1 of the present invention, and is a piezo electrode type two with a corona discharge electrode 8, a non-corona third electrode 47, and opposing 11i poles 6.6゜ of one set 4 on both sides. A long corona transmission line 3
5, which is a device configured to denitrify and denitrate exhaust gas. In the middle of the adjacent Le Chokinzoku n4B, 48°, 48",
Is this the linear corona discharge electrode 8.8°? The human tree F support conductor 27 of the support frame 7 is arranged in a row and insulated from this.
．． 28 HA 6&lI! ′? 31, 49, 5 o
and rJ27 are stretched and fixed by the fixed F part insulator 32, and are connected in series by the connecting conductor 33° to form one long linear corona radiation R pole with an open end, and one pair on each side. non-corona third electrode 4B-48',
4B'-48" and a pair of opposing electrodes 6.6°
These partial corona transmission lines are connected in parallel to form one corona transmission line 35. The metal support frame 7 has pillars 12, leads 158. Switch 51. :li
The bias direct tIL high voltage' is connected to the negative output terminal -f of the It source 15 through the ductance 14, and the negative bias direct ti high voltage is connected to the dual selector switch 52.
Guide 1i53. Corona discharge electrode 8 via high resistance 54 for M leakage
is also applied. Now isolated. The core wire 56 and outer sheath 55 of the high voltage coaxial cable 17 with the conductor outer sheath 55 insulated from the positive voltage ultra-short pulse power supply 18, the four wires 53. The ultra-short pulse high voltage supplied via the double changeover switch 52 and the conductor wires 57 and 58 is connected to the common conductor 37 for distribution and the metal support 1.
2 through the long core a'it pole 8 input end 36 and metal support! A polarity is applied between one end 59 of the left side of one frame 7 with the former being negative, and then 8-48.8-48°, 8-6.8-6
parallel corona transmission lines consisting of 8″-48′,
8'-48''.

A traveling wave pulse is propagated as a high voltage through an open-ended serial corona transmission line consisting of 8°-6, 8°-6°, and 1
48.48' from 8 as MI, and 48° from 8'', 4
A strong negative corona is released toward the 8" to desulfurize and denitrify the exhaust gas. The negative ions generated at this time are released in the direct current electric field formed by the action of the bias direct IIL high voltage electric 1Gi15 in the gas passage. The action drives the opposing electrode to 6.6°.

During this time, the dust and ammonium sulfate particles in the exhaust gas are bombarded with a negative R-Ift, and are separated and collected on the counter electrode Mi6.6°, which also serves as a dust collection electrode, by the action of Coulomb force. The feature of this method is that the non-corona third electrode 47 is used, so the distance between this and the corona radiation 'rtt pole 8.8° can be selected to be sufficiently small, and the value of the output pulse voltage of the high-voltage ultra-short pulse power supply can be IMagl 18 of the present invention between both electrodes even if it is relatively low.
The electric field for disulfuric acid can easily form a high electric field that satisfies the condition 1. In this case, of course, the negative corona =
A part of the corona discharge electrode 8.8° also expands toward the opposite electrode 6,6°, and if the output voltage of the source 15 is made high enough, the Also in the gas passage 19 between .8' and the counter electrode 6, 6°,
A desulfurization reaction takes place. If the dual selector switch 52 is turned on to the right while the switch 51 is left on, the ultra-short pulse high voltage supplied from the high-voltage ultra-short pulse power supply 18 via the re-cable 17 is transferred via the combined fundenosars 60' and 60. Since the voltage is applied to the conductors 57 and 58, the high voltage ultra-short pulse power source 18 does not require insulation, and the high voltage coaxial cable 1
The outer skin 55 of No. 7 can also be grounded. Switch 5! When the switch is turned off, the direct current high voltage is applied to the corona discharge electrode 8.8.
'flt!' and the non-corona third phase is no longer affected, and the 182 nitrate desulfurization effect continues, but 'flt! : Air dust collection effect disappears.

FIG. 8 is a cross-sectional view of another embodiment of the present invention.

In No. 71; 4, instead of the non-corona third electrode 47, a corona third electrode 62 consisting of a linear corona discharge electrode 61, 61°, 61" is fixed and stretched on the water moth support conductor 27.28 of "-F. 61-61', 61'-61+, a linear corona radiation 1 is placed between the poles 8.8' on one side and the &J tubes 31, 31' passing through the water support conductor 27. , below is an insulator 29 fixed to the lower horizontal support conductor 28
．． It is strung at an angle of 29 degrees and provided with insulation. One end of 8° 8° is the output terminal of the IF of the high voltage ultra-short pulse power supply 18 which is in contact with the conductor 37 and insulated pipe 38.4 wire 57. -f
- is connected to the core wire 56 of the high voltage coaxial cable 17 connected to. In addition, the 1st wooden support conductor 27 has a metal support 12.4 wire 5B and a switch 51.5QN at its right end.
11 of the bias DC high voltage power supply 15 via the inductance 14. It is connected to the output terminal of 9! It is connected to the insulated conductor sheath 55 of the high-voltage coaxial cable 17 via a dual changeover switch 52. Therefore, the linear corona radiation '1liJ48.8' always has a high resistance of 54
Similarly to the linear corona third electrodes 61, 61°, 61'', a bias DC high voltage of iE is applied to the ground facing pole 6.6°. A very short pulsed high voltage is applied to the corona emitter 7It pole 8,8' with a polarity such that 8,8° is 1 [polarity to 61.61', 61'''. In this case, in the process of propagating the steep wave front of the extremely short pulse high pressure from 1- to D, it first propagates from 61.61' to 8, and then from 61' to 61' to 6.
A negative streamer-like corona discharge occurs from 1" to 8', and is induced by this from 8 to 61.61' and 6,
towards 6° and from 8° 61', 61" and 6,6
A strong positive streamer-like corona discharge is generated in the direction of the corona discharge electrode, bridging the gas passage 19 between the corona discharge electrodes 8, 8° and the counter electrode 6.6, thereby denitrifying the exhaust gas.・Desulfurization is carried out. In this case, the length of 8.8° is approximately 6 m, and the lower end is an open end with a peaking effect, so for the reasons already mentioned, the extremely short pulse high voltage associated with positive corona discharge Despite the significant loss of the wave height, uniform positive and negative corona discharge is generated over the entire length of the tube.As shown in this example, the third electrode is also used for corona discharge! The advantage of using it as a pole is (1
) Addition of discharge chemical denitrification and desulfurization action by the pioneer negative corona discharge from the third electrodes 61, 61', 61'', (
2) Collision by this streamer-like precursor negative corona emitter'
Il! Between the two corona electrodes and the gas passage 19 due to separation and photoionization? The negative corona streamer that generated ff F and extended to the vicinity of the corona discharge electrode 8.8 degrees is
Since a strong electron space electric field /+r',v field is generated in front of 8.8°, the streamer corona discharge of I[, which corrects from 8.8° at the next moment, becomes extremely stable and elastic, resulting in denitrification and desulfurization effects. The goal is to be able to demonstrate more effectively. −
If the dual selector switch 52 is turned to the right, there is no need to insulate the high voltage ultra-short pulse power supply 18, as in the embodiment shown in FIG. .8'.

Since no voltage is applied to 61.61' and 61", there is no direct current bias electric field in the gas passage, and the IE streamer-corona emission 111 progresses from 8.8" to 6.6" when ultra-short pulse high voltage is applied. The denitrification and desulfurization effects will be weakened, but the dust collection effect will be reduced.

Figure 9 shows an example of a system in which the present invention can be applied to a two-electrode type corona electrode system in which one electrode is a corona discharge electrode. Support insulators 66, 67, wooden f-beams 9, which are fixed to the ceiling 65 of the casing 1 at the upper and lower ends, respectively, have double helix electrodes at the double helix electrodes.
[#Support with two defined helical grooves/-
It is screwed into the spiral grooves 68 and 69 and is insulated. And 63.64 two strands 70-71°72-
73 are connected at their lower ends to connecting conductors 74.75, so that 63.64 are connected in series to form one open-ended corona transmission line. And its input end 79 is connected to conductors 76, 77, 6! J′i
? 78 to the core wire 56 of the high voltage coaxial cable 17 and the grounded conductor sheath 55, thereby providing a high I[
It is connected to an extremely short pulse power source 18. The extremely short pulse (5 voltage) applied to the input terminal 79 at this moment propagates downward along the two J lines 70.71 of the double helix electrode 63 as a traveling wave, and then passes through the double helix electrode 74.75. Spiral electrode 6
4, propagates downward along the J lines 72 and 73, and reaches its open end #jA80, where the total length is increased to q4 and peaking is performed. During this time, 63 strands 70,
J of 71 and 64: both 2 along the whole of line 72. Na1
Two people are required to generate a streamer-like corona discharge (Ift) and add ammonia gas (denitrification and desulfurization of the exhaust gas introduced from No. 12 is carried out. The purified gas is passed through a dust collector from output No. After removing the top of the dust, it is discharged into the star and evening.40.40° is a hammering device attached to 7r well 6.

- The ammonium sulfate dust deposited on the strands of the π helical electrode is dropped into the hopper 4 below by hammer blow, and is discharged to the outside from the discharge section 5.The feature of this example is that the pixel t also has a linear corona. By using the JIl [i-pole'-east helix electrode, the denitrification and desulfurization effects are enhanced by the cooperative synergistic action of the negative corona and the single corona as described above, and the space loading rate of the electrode is also improved! Structure 1 has a great advantage in that it is possible to easily remove a large number of electrodes.

Figure 1θ (a) shows an extremely short pulse height of 1! which is used in the present invention. In figure 0, which shows a circuit system of a high-voltage pulse power supply for generating voltage, 81 is a low-voltage main power supply) l-voltage transformer 8
It is connected to the primary side of 2 and supplies pressure to the alternating box F'1, and generates an AC high voltage with a peak value of 150 KV on the secondary side, which is the t-wave rectifier IIL condition 83. Protective resistance 84. Negative tank capacitor 86 via blocking inductance 85! 50K
Charge to V. In this case, the tank capacitor 86 is charged from zero voltage to the peak pressure due to the total current flow, so the circuit loss due to charging is due to the extremely small fl characteristic of AC charging, which occurs during this half-cycle of charging. Within the period of
A rotary spark switch 89 interposed between the - end of the tank capacitor 86 and a fixed spark electrode 87. The rotating spark electrodes 91, 92, 93, 94 are all separated from 87, 813 by a sufficient distance, and no spark is generated in these areas. The rotor 90 is insulated from the earth and has four spark electrodes 91 to 94 arranged at angles and conductive to each other, and a motor rotates the rotor 90 in synchronization with the frequency of the secondary AC high voltage. is the guide d
During the half cycle in the state, the rotating spark electrodes 91 to 94 are separated from the constant spark electrodes 87 and 88.

Then, during the next half cycle of the alternating voltage, the polarity of the secondary AC 1% voltage of the step-up transformer 82 is reversed and the rectifier 83
If the force becomes 1g in the form of a+tU-, then within the period of the period, either of the two pairs of rotating sparks ii poles 91-93, 92-94 =
Synchronization in which the phase of the supplied kA voltage, and therefore the phase of one rotation, is controlled by the action of the phase adjuster 95 so that the pair sequentially approaches the constant electrode 87.88 and generates a spark *0
Consists of 96 machines. Now, when the rotating spark switch 89 is turned on by a spark, the charged TL voltage of the capacitor 86 is discharged through the surge inopedance Z, (pure resistance R) of the coaxial cable 17, and its CR emission? I! The waveform propagates to the right as a traveling wave of extremely short pulse high voltage with a negative waveform, and the exhaust gas is denitrified by the present invention via the coupling capacitor 16.
Enter the 9i7297 and use a thousand negative DC bias high voltage electricity!
! A15 applies a negative bias direct current high voltage through the cold current capacitor 14 to the corona transmission line 35, which consists of a long zigzag linear corona discharge electrode, and performs denitrification, wheel removal, and dust collection. .

Figure 1θ (b) is an example of Figure 10 (a), where the low pressure alternating current r'
The 1u source 81 consists of a series connection circuit of a commercial frequency AC 1rt source 98 and a thyristor 99. The circuit system of an example of an extremely short pulse high voltage power supply is shown, and all other ffJs are thyristor 99.
．． 10(a) except for the control signal section 102 of lOO. In this example, the thyristors 99, 100 are synchronized with the AC main voltage at an appropriate phase point of each T-wave.
A control signal is supplied from the control signal section 102 to q
Let it pass. More conductors from the control signal section 102! Another control signal is sent via 03 to a phase adjuster 95, which controls the rotational phase of the synchronous motor 96 so that when the thyristors 99, 100 are in the on state, the rotational spark switch 2
fixed spark electrodes 87 and 88 of circuit 89 and rotating spark electrode 91
- 94 are sufficiently separated so that they do not generate sparks, and the F2 spark 1 is brought close to generate sparks only when thyristors 99 and 100 are in the off state.

Figure 11 shows the corona transmission line 3 in Figures 10 (a) and (b).
5 and the counter electrode 6.6°, where E indicates time. ``The heavy pressure waveform is a negative bias DC high voltage Vd and a negative extremely short pulse high voltage periodically. It will be a letter. Therefore, (Vd+Vp) becomes the peak f1 of the voltage applied to the gas passage between the two electrodes, and the output voltage of the pulse source can be reduced by Vd, which is economical. In this case, the negative ions generated by the negative ultra-short pulse crystal type If: are driven toward the opposite electrode at 6.6° by the negative bias DC high voltage, so that the negative ions generated by the negative ultrashort pulse crystal type If: is charged by the bombardment of negative ions.

Since a direct current electric field is present in the gas passage due to the bias direct voltage described above, an electrostatic precipitating action is performed in which the charged particles are driven and collected by the opposing electrodes 6 and 6°. However, when the purpose is only to denitrify and desulfurize the exhaust gas without using the 4Jk order, especially when using a 1F ultra-short pulse high voltage (in this case, the equipment interval can be significantly reduced), the bias DC If a voltage is constantly applied to the corona discharge electrode, the ions will be moved by the DC electric field and an ionic current will flow, which may be undesirable because it will cause considerable energy loss. In this case, 111, which is easy to form, can be used instead of the direct voltage as the bias high voltage.
It is advantageous to use a wide bias pulse of tk and expropriation to significantly reduce power loss due to ion current.

FIG. 12 is an example of a high-voltage ultra-short pulse (ta) using such a bias pulse height of 1tC pressure for use in the present invention. 104 is a high-voltage ultra-short pulse power supply, and low-voltage "power supply 81"
, transformer 821 for both wave rectifier tQ transformer 101 . Reduced R resistance 8
4. Wood fiber inductance 85. Pulse waveform shaping capacitor 105, which also serves as a coupling capacitor. i&Il leakage resistor 106, and fixed spark electrode 107 and grounded rotating r
Four rotating spark electrodes 91, 92 attached to 891
．． 93.94. The driving synchronous motor 96. The phase adjuster 95 and the control signal section 108 are connected as shown in the figure.
Consists of arranged items. Further, 109 is a high voltage bias pulse source for generating a high voltage bias pulse, and a low voltage commercial frequency power source 110. Step-up transformer 111, double-wave rectifier 112. Damping resistance 113. Cold current inductance 114. Tank condenser 115. Thyristor switch book ml-116, connected in anti-parallel with this! l'
! Magic base 118. Control signal section 10B of switch element ttS
, resonance inductance 117. A small protective inductance 119 in series with the rectifier 118. Thyristor switch for residual voltage reset 120. The control signal section 108,
120 protective resistors 121. Changeover switch 122 and l
23. Pulse transformation fi124 for internal pressure. Small protective inductance 125. High voltage conductor 12B, 127.128
and grounding 4MA129. The output terminals 130 and 131 are connected and arranged as shown in the figure.

High n', output terminal 132 of J4i pulse power supply 104,
133 is the input end of cable 17 which also serves as a transmission line for shunting.

The core wire 56 is connected to the outer skin 55 of the cable 1.
At the output end of 7, the core 1Q56 is connected to the corona discharge electrode JT 8 of the denitration/desulfurization device 97, and the conductor sheath 55 is connected to the grounded counter electrode group 6.6°. In addition, the output terminal f-130 of the bias pulse high II Mi'IIt source 109,
Is each 131 a high-voltage ultra-short pulse? It is connected to output terminals 132 and 133 of the It source 104 as shown. When the changeover switches 122 and 123 are turned on as shown, the pulse transformer 124 is disconnected. First, when the output voltage of the low voltage power supply 81 takes a value near zero, that signal is a conductor! 34 to the control signal unit 108, from which a trigger control signal is sent to the control grid of the thyristor 116 via the 4-wire 135, and! 16
turns on. This allows for a sufficiently large electrostatic capacitance S★Co
The 1F DC high voltage of the tank capacitor 115 having a resonance inductance 117. is equal to the inductance value.
Conductive wires 126 and 127. Protective inductance 125. Output terminals - 130, 132 and 4 wires! 29. Output end 1/-
131 and 133 and further via the cable 17 between the corona discharge electrode group 8 and the counter electrode group 6° 6° of the denitrification and desulfurization device 97, and the interelectrode electrostatic capacity C1 is applied to the charging voltage of the capacitor 115. ■Hanido Vp nearly twice that of 0
Resonant charging is performed by the transient vibration of L and CI of 117 up to o. <ItLCon) CI and 0th order also L
and CI's 11!4f! Voltage VpO of CI due to I vibration
But no vibration/ductance 117. tank capacitor 1 via protective inductance 119
15, and in the course of this cycle, its width is L and C between the corona discharge electrode group 8 and the counter electrode group 6.6°.
A positive bias pulse high voltage with a wide peak value Vpo of II determined by I is applied. However, due to the Ini path loss, the DC path pressure Vr always remains between the ends F130 and 131, and if this is left unattended, it will accumulate and the transient vibration itself due to L and CI will not occur, so - From 108 at the end of the cycle A trigger signal is passed to the reset thyristor switch 120 via the conductor 136 to turn it on, and the protective resistor 121 with a small residual voltage and the thyristor switch 120 are connected to each other.
20. In this case, the changeover switch 122.
123 in opposite directions, this reset thyristor switch 120 is released.

The pulse transformer 124 is connected, and the above-mentioned bias-pulse high voltage) is applied, and the residual voltage Vr is discharged through the secondary/8 wire of the pulse transformer 124.
Pulse transformer losses are added. Now, when the bias pulse high voltage reaches its peak Vpo, the phase adjuster 95 controlled by the signal from lO8 adjusts the rotational phase of the rotary spark switch 89 to ljlW.
Four rotors 90 f: 9
Rotating spark electrodes 91 to 94 arranged with a rotation angle of 0
One of them approaches the fixed spark i pole 107 and generates a spark, and the static 7I which also serves as a coupling capacitor! The charging voltage of the pulse waveform shaping capacitor 105 of the agonizing C is discharged through the surge impedance Zo (=R) of the high voltage coaxial cable 17 which also serves as a transmission line for separating the rotary spark switch 891, and the CR discharge generated at that time is The extremely short pulse high voltage of 1[ with an extremely 1υ peak value Vp of Ill propagates to the right through the cable 17L as a traveling wave, and due to the blocking effect of the inductance 125 that does not allow such steep pulses to pass, the bias pulse height is reduced. The voltage peak (4 V po as shown in Figure 13) is applied between the corona discharge electrode group 8 and the opposing electrode group 6.6 degrees, and a peak electric field Ep due to (Vpo + Vp) is applied to the gas gap. It is formed and achieves effective denitrification and desulfurization effects with extremely high power efficiency.

:iS Figure 14 (a) shows the names and functions of elements 6 to 106 in Figure 0, which shows another circuit system of a high-voltage ultra-short pulse power supply for generating ultra-short pulse high voltage used in the present invention. are the same as those of the elements with the same numbers in FIGS. 10(a) and 10(b). However, in this example, the capacitor 8 is used as a capacitive energy storage element for pulse shaping.
The high-voltage coaxial cable 17 itself is used instead of the high-voltage coaxial cable 17 to reduce costs, and the electrostatic charge between the core wire 16 and the conductor sheath 15 is charged to a positive high voltage at the input end 138 of the t-tank. From the capacitor 86 to the small damping resistor 139. The conductor 14 is connected to the core side output g142 of the high-voltage coaxial cable 17 which is charged via the inductances 140 and 141.
A coaxial spark switch 89 is connected through 3, and when it is turned on, the voltage of the coaxial cable 17 is changed to a short rectangular positive traveling wave pulse high voltage via the coupling capacitor 16-. Positive bias DC high voltage power supply 1
5, the positive bias DC high pressure obtained by Ji-5 is obtained and the corona discharge electrode 1 of the nitrification/desulfurization equipment 2'197
18 and the counter electrode! ? It is applied between 6 and 6 degrees to perform the denitrification and desulfurization reaction! , when the Q switch 13 is turned to the left, the fixed spark electrodes 144 and 145 constitute a 11-type fixed spark switch 147, and the time constant determined by the resistor 139 and the capacitance r- of the coaxial cable 17 is used. Every time the charging voltage exceeds the spark voltage of the spark switch 147, a spark is generated, and an extremely short pulse high voltage is supplied between the electrodes 97 to carry out the denitrification and desulfurization reaction. This extremely short pulse high voltage is reflected and returns in the opposite direction, but the cold current inductance is 140.14
Due to the blocking action of 1, the light is reflected without entering the inside of the power supply, and thereafter it is attenuated by repeating thousands of reflections.

In this example, a high I] coaxial cable 17 is used as the capacitive energy storage JA element, but instead of that, the
As shown in b), inductances 86a, 86a', . . . and inductances 140a, 14θa', . . . are connected in a ladder shape.

LC ladder type energy JJa22J l7a can also be used.

Fig. 15 shows another circuit system of the high-voltage ultra-short pulse power supply to be used in the present invention, in which a fixed spark electrode 107 is used instead of the grounded rotating spark switch in Fig. 12, and a 6f dynamic fixed grounding A self-destructive fixed spark switch 147 consisting of a spark electrode 146 is used. A pulse waveform shaping capacitor which also serves as a coupling capacitor is connected via a resistor 84 and cold current inductances 140 and 14 to a positive DC high-voltage power supply 14B with an output voltage of positive voltage o and a negative bias DC high-voltage power supply 15 with an output voltage of -vb. 105 is charged to a voltage of Vo+Vb with the polarity shown. When the charged St pressure exceeds the spark 7E generation voltage of the spark switch 147, a spark is generated between the spark Ml poles 107 and 146 in a self-destructive manner, and the potential of the power terminal 149 of the capacitor 105 instantly becomes the ground potential. The other terminal 150 is -(V O+ V
b) Tona! J, t “l” knee V b
ノ/< IAS The voltage of -Vo is applied to the corona transmission line 35 for the denitrification and desulfurization reaction, which is supplied with a DC high voltage. 1 with a time constant determined by the resistance of
The spark switch 14 is charged again by 1f and returns to its original state fE.
7 turns on 14 times and this operation continues, and in this process -
vO undergoes CR attenuation with the time constant 1-, and the waveform of the CR reduction current F becomes the predetermined pole 1υ pulse +1'5'+'ti pressure. In this case, as the spark electrodes 107 and 146 wear out, the distance between them changes, and this causes the spark switch! 4
The spark if pressure of 7 is l: )L L, the pulse voltage is 1-
The voltage divider 151.15
The spark voltage is detected by 2, and this is manually input to the spark pressure control device 153, and the operating unit 154 holding the spark electrode 146 is controlled and driven in one direction so that the spark I and the voltage are -, O, °. and control the spark interval to reduce the spark pressure.
Make sure to keep it constant.

When using the gas purification apparatus according to the present invention in an actual exhaust gas purification process, there are various uses fffF'E. 16th t4 (a) to (e) are small examples of some of the examples. A hatched portion 155 is the gas purification device according to the present invention. The figure (a) shows a pulse height of 1" above I [
This device 155 using the above is installed in the middle of the exhaust gas duct,
Part 1. a container 20 for injecting a suitable additive, such as ammonia, into the exhaust gas in the flow-side duct 156;
+! ``Person y2x is the one who immersed the additive injection device 157 consisting of the inlet nozzle 22.'' The figure (b) further shows a gas cooling tower 1511 on the 1-stream side to cool the horizontal gas to lower the temperature and improve the gas purification efficiency of denitrification and desulfurization 1, and on the downstream side to produce ammonium sulfate, etc. Water-soluble gaseous reaction products such as bag filters and scraps for collecting particles (1 to NO2) and SO2 to water/NaOH aqueous solution-N
A suitable post-processing device 159 such as a flapper for removal with an a2cO3 aqueous solution or an absorbent such as milk of lime is provided, and 160 is a stack. Figure (e) shows three! 1 of the electrostatic precipitator 164 consisting of the I forward chamber 161, 162, 163: the downstream dust collection chamber 161, the inlet [1 duct 156
Gas purification devices 155 and 155' according to an uninvented method are installed in the 155 and 155 degrees, and gas purification processes such as denitrification and desulfurization are completed within a short residence time using the positive pole and one repulse high voltage at 155 and 155 degrees, respectively. , && Yasu, etc. are electrostatically collected into dust and Jl- in the exhaust gas in dust collection chambers 162 and 163. In the same figure (d), all dust collection chambers t are inspected (C).
A negative extremely short pulse high voltage is applied to at~163 as a negative direct current bias high voltage to perform both gas purification according to the present invention and dust collection by negative pulse charging of the electrostatic precipitator R1. be. 14(e) is a wet-type flue gas desulfurization device using one type of wet fluttering flapper of the Congregation Song Dynasty, a bag filter 1, a tonne air collection 1 device, etc.
It is equipped with a gas purification system 7155.

The present invention is applicable to, for example, a cylindrical dust-collecting bag filter in which a linear corona discharge electrode is provided inside the electrostatic bag filter. It goes without saying that χ may also be applied by applying an extremely short pulse crystal type C to the corona discharge electrode directly or via a coupling capacitor to a bias DC high pressure.

[Effects of Initiation 1] The present invention eliminates the need for equipment such as catalysts, flappers, electron beams, etc., which have high equipment costs and operating costs and is troublesome to maintain. It effectively denitrates and desulfurizes the exhaust gas at the same time by chemical action, so there is no corrosion of the equipment, easy maintenance, and low equipment and operating costs.In addition to denitrification and desulfurization, it also uses negative corona discharge. This is suitable because electrostatic collection of dust in exhaust gas can also be performed within the same device.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a -% embodiment of the exhaust gas denitrification +1 desulfurization apparatus according to the present invention, and Fig. 21) 4 is a cross-sectional view thereof. 1
li3 [ri, Fig. 4, Fig. 5, Fig. 6 (a), Fig. 6 (
b). 7th [, 4, 8, and 91] respectively show longitudinal cross-sectional views of the 1N-dad embodiment of the present invention, tOI;
4(a) and 1014(b) respectively show different circuit systems of the high-voltage ultra-short pulse and v source used in the present invention.
Figure 1 shows the pressure waveforms obtained with these power supplies.
Figure 2 shows the high-pressure J4I'ru Nor'1l used in the present invention.
The current circuit system of tl is reduced, and No. 131yj is used to reduce the heavy pressure waveform obtained by this. Figs. Part (b) shows the circuit system
shows the LC ladder f-, energy storage cost, mono circuit diagram,
Figure 16(a), :tS16(b), Figure 16(c)
, :A16 (d) and No. 161:'2 (e) respectively show the installation and use configurations W when the gas purification apparatus according to the present invention is installed and used in the 78th process unit. +) The names of the main elements in 4 are as follows. l・・・・・・・・・・・・・・・・・・・・・・・・
Kezong 2・・・・・・・・・・・・・・・・・・
・・・・・・Gas population 3・・・・・・・・・φ・・・
・・・・・・・・・Gas outlet 4・・・・・・・・・・・・
・・・・・・・・・・・・Hopper 5・・・・・・・
・・・・・・・・・・・・・・・・Dust discharge [+6
．． 8゛・・・・・・・・・・・・・・・・・・・・・
Counter electrode or dust collecting electrode 8.8゛・・・・・・・・・・・・
......Corona discharge electrodes 8a, 8a'...
・・・・・・・・・・・・・・・Peaking failure 7
If pole 13.51, 122.123...
・・・Selector switch 15・・・・・・・・・・・・・・・
・・・・・・・・・Bias il'j style high voltage power supply 16
, [10,80°, 105 ・・・・・・・・・・・・
・Coupling capacitor 17・・・・・・・・・・・・・・・
・・・・・・・・・Cable +7a・・・・・・・・・
・・・・・・・・・・・・・・・LC Kada-f type energy reishi ffJsa18・・・・・・・・・・・・・・・・・・・・・
・Rules 11 bar ultra-short pulse power supply 13...
...... Gas passage 22...
・・・・・・・・・・・・・・・・・・・・・7 Nomonia gas inlet 23.158・・・・・・・・・・・・・・・
・・・・・・Inlet duct 33.34 ・・・・・・・・・
・・・・・・・・・Peaking coil 35...
・・・・・・・・・・・・・・・・・・Corona transmission line 40.41・・・・・・・・・・・・・・・・・・
... Hammering device 48.48', 48-...
......Ton straight conductor column third electrode 52...
・・・・・・・・・・・・・・・・・・ Double discharge switch [fl, 81'Jl-・・・・・・・・・・・・
・Linear Corona Radiation 7I! Third electrode 81 as a pole, eye 0...
Low voltage AC-E 'iIt source 82) II+...
・・・・・・・・・・・・4 voltage transformer 83.118・
・・・・・・・・・・・・・・・・・・ Half wave straightening tlL
Vessel 85・・・・・・・・・・・・・・・・・・・・・
・・Cold current I/ductance 8JHa, I] [la', +
15.10. Eye 1...Evening/Ku capacitor 89...
・・・・・・・・・・・・・・・・・・・・・ [I71 Rolling spark switch 95・・・・・・・・・・・・・・・・・・
......Phase adjuster 96...
・・・・・・・・・・・・Recycle electric motor 99.100.
116.120・・・・・・・・・Thyristor lot
,+12・・・・・・・・・・・・・・・Double wave rectifier+02・・・・・・・・・・・・・・・・・・
・・System Jl signal section 1!7・・・・・・・・・・・・・・・
・・・・・・Resonance inductance! 24...
・・・・・・・・・・・・・・・・・・Pulse transformer 1
40.141.140a, 140a゛..."...
Inductance 147・・・・・・・・・・・・・・・
......Self-destruct type [M formula spark switch 148...
・・・・・・・・・・・・・・・・・・High voltage direct current source 151.152・・・・・・・・・・・・・・・・・・
・・Voltage dividing resistance +53・・・・・・・・・・・・・・・・
...Spark voltage control section 154...
・・・・・・・・・・・・・Operation section 155.155'・
・・・・・・・・・・・・・・・・・・Gas purification device +5
7・・・・・・・・・・・・・・・・・・・・・Additive injection device +511・・・・・・・・・・・・・・・・
・・・・・・Gas cooling tower +59・・・・・・・・・・・・
......Post-processing device 180...
Ichiban-・・・-・9・・・・Stack le 1.16
2.183・・・・・・・・・・・・! l! Dust chamber 1
fi4・・・・・・・・・・・・・・・・・・・・・
Electric dust collection! A 21165・・・・・・・・・・・・
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On the other hand, °゛ space; Preparation % P work 1 + 5R - - - - - A buried 1 16 o - - - - - - Stack 165 - - - - - - - Kazuyuki Harusai S ( e ) ( d ) Procedural amendment (voluntary) August 27, 1986 1! Director General of the License Agency 1. Indication of the case: Patent Application No. 134475 of 1985 2) Title of the invention: Person who makes ultra-short pulse high-voltage gas purification device 3° supplement +E Relationship with the case: Patent applicant/l, t+li Correct target ``Specification'', column 5 of ``Claims'' of ``Description'', contents of amendment (■) in ``Specification''
4--1--4.7 Bore〉＼ Claims (1) E. For introducing the gas to be purified containing the gaseous dyeing substance of 48 oxide, sulfur f oxide T In the gas passage in the casing, which is equipped with a gas inlet and a gas outlet for discharging purified gas, at least one corona discharge electrode is provided as an upper electrode, and at least the other one is an opposite corona discharge electrode as opposed to the first corona discharge electrode. As an electrode, a corona electrode system consisting of two isolated electrodes with an insulated -1- edge is provided in Phase II: between the corona electrode and the other -L pole, a pulse l+ extremely Rapid energy storage 'AI' element for applying short ultra-short pulses of high pressure, its charging 'It'! In a gas purification device equipped with a high voltage pole 5U pulse power source consisting of a source and a high speed discharge switch, the output J4 + short pulse high voltage of the pressure pole 1U pulse power supply is applied to the corona radiation shaft. The temporal peak (AEp) of the horizontal uniform field strength between the electrodes and the opposing electrodes is defined as the critical ratio Ep
o = 8 d (kV/am) or less 1. This is a gas purification device that is characterized by a 77i fimp. r2) special +tt l17 search (') D enclosure (1) +w
Note a (') Device 1: h 'r', l,,A
J4i short pulse height Jf:'l', (7III+
1. A gas purification device for a place, characterized in that: 'fl' or less. (3) A gas purification device according to JA21 according to any one of claims (1) and (2), characterized in that the capacitive energy storage element is a condenser. (4) A gas purification device according to any one of claims (1) and (2), characterized in that the capacitive energy v7 product element is a high voltage coaxial cable. (5) Any of claims (1) and (2)? i In B, is the acceptable energy? ! A gas purification device characterized in that each i-product element is an LC ladder type connection circuit of a plurality of capacitors and inductances. (6) A gas purification device according to any one of claims (1) to (5), characterized in that the high-speed release switch element is a rotary spark switch. (7) A gas purification device according to any one of claims (1) to (5), characterized in that the high-speed discharge switch 'j2 is a fixed spark switch. (8) In the device according to any one of claims ('l) to (7), the corona electrode system is a two-electrode system consisting only of a corona discharge electrode and a counter electrode, and the other electrode is A gas purification device characterized in that the opposing ``-'' pole is a pole. (9) The arrangement according to claim (8), characterized in that the opposing ``+'' pole is a non-corona electrode. (10) In the device according to claim (8),
The opposite? ! A gas purification device characterized in that the electrode is a corona discharge electrode that performs corona discharge. (I) In the device according to any one of claims (1) to (7), the corona 1 separator thread is provided in the vicinity of the corona discharge electrode, in addition to the counter electrode, and insulated from both electrodes. A gas purifying device characterized in that it is an electrode system, and has a third electrode disposed in the opposite direction. (!2) In the device according to claim (11), the third electrode and the opposing ?It has a DC high voltage power supply for applying a DC high voltage between the ?tt electrodes, and applies the extremely short pulse high voltage between the corona discharge electrode and the third electrode as the other electrode. (13) A gas purification device characterized in that the third electrode is a non-corona electrode in the device according to any one of claims (II) and (+2). Purification device. (14) Gas purification device according to any one of claims (11) and (+2), characterized in that the third electrode is a corona discharge electrode serving as a corona electrode. (15) In the device according to any one of claims (1) to (14), a bias high voltage for previously applying a bias high voltage between the corona radiation 71tJ4i and the other electrode. A gas purification device characterized in that a power source is provided, and the extremely short pulse high voltage of the same polarity as the bias high voltage is applied between the lJ4 electrodes via a coupling capacitor. (16) Patent The gas purifying device according to claim (15), wherein the bias high voltage source is a DC high voltage power source. (17) The device according to claim (15) seeking patent X+ In the apparatus, the bias high voltage power source is a bias pulse high voltage power source that generates a bias pulse high voltage having a voltage 111 that is sufficiently longer than the half value 111 of the extremely short pulse high voltage. Gas purification device. (18) In the device according to any one of claims (1) to (17), the corona electrode system includes at least one of the corona emitter, the counter electrode, and the other electrodes. The J4k whose one length propagates at least that
A gas RTR system characterized by using a corona transmission line having a geometric length of more than half of the geometric length of the f-pulse high' cardiac pressure and having an open end. (19) In the device according to claim (18), a peaking/regulating coil is inserted at a midpoint between at least one of the long electrodes constituting the corona transmission line. A gas purification device for a place characterized by: (2) In the device according to claim (18),
dividing the entire length of the corona transmission line into a plurality of partial lines,
The partial line excluding the partial line at the wave end consists of a plurality of corona discharge electrodes connected in parallel, and the number of corona discharge electrodes connected in parallel is -I-, sequentially from the wave end toward the F flow end. A gas purification device characterized in that it reduces the amount of gas. (2) In the device according to any one of claims (1) to (18), the corona discharge electrode is a peaking corona electrode that is strip-shaped and whose width decreases from the input end to the terminal end. A purification device for a place characterized by: (2) A gas purification device according to any one of claims (1) to (20), wherein the corona discharge electrode is a linear corona discharge electrode with a circular cross section. (23) In the device according to any one of Patent Needs (1) to (2G), the corona discharge electrode is a linear corona discharge electrode with a polygonal cross section. Gas purification equipment. (2) In the apparatus according to any one of claims (1) to (20), the #corona discharge ffi pole is a linear corona discharge electrode with a star-shaped cross section, for gas purification. ! Device. (25) A gas n-conversion device according to any one of claims RIJll (1) to (20), wherein the corona discharge electrode is a strip-shaped linear corona discharge electrode. . (2) In the device according to any one of claims (1) to (20), the corona emitting device? A gas purification device characterized in that ItJ4i is a protrusion (・1 &Q-shaped corona discharge electrode. (27) Particularly,; , a gas purification device characterized in that the corona discharge electrode is a rod-shaped corona discharge electrode with a protrusion. (2) In the device according to any one of claims (1) to (20), A gas purification device characterized in that the corona discharge electrode is a strip-shaped corona discharge electrode with projections. (2) In the device according to any one of claims (1) to (28), the extremely short A high-voltage pulse power source and the corona electrode system are connected by a high-voltage coaxial cable, and the length of the Ii# coaxial cable is defined as the geometric length F of the ultra-short pulse high voltage propagated through at least one of the cables. Gas purification characterized in that the action of a transmission line for separation is imparted to !A ;!1 m (30) Claims (1) to (9) and (
In the device according to any one of 11) to (23), the corona emission, tJ*, and the counter electrode are respectively the emission ffi electrode and the dust collection electrode in an electrostatic precipitator, and the casing collects the dust below. With a hopper for receiving particles. 1. A gas purification device having an exhaust port for discharging the exhaust gas to the outside, and in addition to purifying the exhaust gas, it also performs electrostatic precipitation of fine particles in the gas. (31) The device according to any one of claims (1) to (30) is provided with a hammering device for applying a mechanical impact to at least the name of the corona discharge electrode and the counter electrode. Features of gas purification equipment. (32) In the apparatus according to any one of claims (1) to (31), the corona '1ttJSi system is arranged and submerged in a casing of an electrostatic precipitator for gas purification. Device. (33) The gas purification device according to any one of claims (1) to (32), characterized in that the device is provided with means for forming a liquid film on the surface of the opposing tJ4i or dust collecting electrode. Device. (34) The apparatus according to any one of claims (1) to (33), further comprising an additive injection device for adding a reaction accelerating additive to the gas to be purified in advance. Gas purification equipment for places where (35) A gas purification device according to scope (34) of Patent J+7, characterized in that the additive injection device is an ammonia injection device. (38) The apparatus according to any one of claims (1) to (35), characterized in that it is equipped with a gas pretreatment device for pretreating the gas to be purified. Gas purification equipment. (37) The gas purification device according to claim (36), wherein the gas pretreatment device is a gas cooling tower. (38) The apparatus according to any one of claims (1) to (37), characterized in that it is equipped with a gas post-processing device for further post-processing the purified gas. Device. (33) A gas purification device according to claim (38), characterized in that the gas post-treatment device is a gas absorption device for absorbing gas after reaction. (40) The gas b converting device according to claim (38), wherein the gas post-processing device is a dust collector.

Claims (1)

[Claims] (1) Provided with a gas inlet for introducing gas to be purified containing gaseous pollutants such as nitrogen oxides and sulfur oxides, and a gas outlet for discharging the purified gas. A corona electrode system consisting of two or more independent electrodes arranged in a gas passage in a casing, at least one as a corona discharge electrode and at least one as a counter electrode facing the corona discharge electrode, insulated from each other. A high-voltage ultra-short circuit comprising a capacitive energy storage element for applying an ultra-short pulse high voltage with an extremely short pulse width between the corona electrode and other electrodes, a power source for charging the same, and a high-speed switching element for discharging. In a gas purification device equipped with a pulse power source, the output ultra-short pulse high voltage of the high-voltage ultra-short pulse power source increases the temporal peak value Ep of the distance-wise average electric field strength between the corona discharge electrode and the counter electrode, Critical value Ep0 = 8d (kV/cm
) A gas purification device characterized by having a wave height value Vp as above. (2) The gas purification device according to claim (1), wherein the half width of the ultrashort pulse high voltage is 1 (us) or less. (3) A gas purification device according to any one of claims (1) and (2), characterized in that the capacitive energy storage element is a condenser. (4) A gas purification device according to any one of claims (1) and (2), characterized in that the capacitive energy storage element is a high-voltage coaxial cable. (5) The device according to any one of claims (1) and (2), characterized in that each of the capacitive energy storage elements is an LC ladder-type connection circuit of a plurality of capacitors and inductances. gas purification equipment. (6) A gas purification device according to any one of claims (1) to (5), characterized in that the high-speed discharge switch element is a rotary spark switch. (7) A gas purification device according to any one of claims (1) to (5), wherein the high-speed discharge switch element is a fixed spark switch. (8) In the device according to any one of claims (1) to (7), the corona electrode system is a two-electrode system consisting only of a corona discharge electrode and a counter electrode, and the other electrode is the counter electrode. A gas purification device characterized by: (9) A gas purification device according to claim (8), wherein the counter electrode is a non-corona electrode. (10) In the device according to claim (8),
A gas purification device characterized in that the counter electrode is a corona discharge electrode that performs corona discharge. (11) In the device according to any one of claims (1) to (7), the corona electrode system includes a corona discharge electrode, a counter electrode, and a portion insulated from both electrodes in the vicinity of the corona discharge electrode. A gas purification device characterized in that it is a three-electrode system having a third electrode arranged therein. (12) The device according to claim (11), further comprising a DC high voltage power supply for applying a DC high voltage between the third electrode and the counter electrode, and applying the ultrashort pulse high voltage. A gas purification device characterized in that a voltage is applied between the corona discharge electrode and the third electrode as the other electrode. (13) A gas purification device according to any one of claims (11) and (12), characterized in that the third electrode is a non-corona electrode. (14) A gas purification device according to any one of claims (11) and (12), characterized in that the third electrode is a corona discharge electrode serving as a corona electrode. (15) In the device according to any one of claims (1) to (14), a bias high voltage power source is provided for applying a bias high voltage in advance between the corona discharge electrode and the other electrode. . A gas purification device characterized in that the extremely short pulse high voltage of the same polarity as the bias high voltage is applied between both electrodes via a coupling capacitor. (16) The gas purification device according to claim (15), wherein the bias high voltage power source is a DC high voltage power source. (17) In the device according to claim (15), the bias high voltage power source generates a bias pulse high voltage having a width sufficiently longer than the half width of the extremely short pulse high voltage. A gas purification device for a place characterized by a pulsed high-voltage power source. (18) In the device according to any one of claims (1) to (17), the corona electrode system has a length of at least one of the corona discharge electrode, the counter electrode, and the other electrode. A gas purification device characterized in that it uses a corona transmission line which is at least half the geometrical length of the ultra-short pulsed high voltage propagating thereover and whose terminal end is open. (19) The device according to claim (18), characterized in that a peaking coil is inserted at a midpoint of at least one of at least one long electrode constituting the corona transmission line. gas purification equipment at the location. (20) In the device according to claim (18), the entire length of the corona transmission line is divided into a plurality of partial lines, and the partial lines except for the partial line at the downstream end include a plurality of parallel corona discharge electrodes. What is claimed is: 1. A gas purification device comprising a plurality of corona discharge electrodes connected in parallel, and the number of corona discharge electrodes connected in parallel gradually decreases from an upstream end to a downstream end. (21) In the device according to any one of claims (1) to (18), the corona discharge electrode is a peaking corona electrode that is strip-shaped and whose width decreases from the input end to the terminal end. A purification device for a place characterized by: (22) A gas purification device according to any one of claims (1) to (20), wherein the corona discharge electrode is a linear corona discharge electrode with a circular cross section. (23) A gas purification device according to any one of claims (1) to (20), wherein the corona discharge electrode is a linear corona discharge electrode with a polygonal cross section. . (24) A gas purification device according to any one of claims (1) to (20), wherein the corona discharge electrode is a linear corona discharge electrode with a star-shaped cross section. . (25) A gas purification device according to any one of claims (1) to (20), characterized in that the corona discharge electrode is a strip-shaped linear corona discharge electrode. (26) A gas purification device according to any one of claims (1) to (20), characterized in that the corona discharge electrode is a linear corona discharge electrode with a protrusion. (27) A gas purification device according to any one of claims (1) to (20), characterized in that the corona discharge electrode is a rod-shaped corona discharge electrode with a protrusion. (28) A gas purification device according to any one of claims (1) to (20), characterized in that the corona discharge electrode is a strip-shaped corona discharge electrode with projections. (29) In the device according to any one of claims (1) to (28), the ultra-short high-voltage pulse power source and the corona electrode system are connected by a high-voltage coaxial cable, and the length of the coaxial cable is A gas purification device characterized in that the length is at least longer than the geometrical length of the ultrashort pulse high voltage propagating thereon, and the action of a separation transmission line is imparted to the ultrashort pulse high voltage. (30) Claims (1) to (9) and (
In the device according to any one of 11) to (29), the corona discharge electrode and the counter electrode are respectively a discharge electrode and a dust collection electrode in an electrostatic precipitator, and the casing receives downwardly collected particles therein. A hopper for storing
1. A gas purification device having an exhaust port for discharging the exhaust gas to the outside, and in addition to purifying the exhaust gas, it also performs electrostatic precipitation of fine particles in the gas. (31) The device according to any one of claims (1) to (30) is provided with a hammering device for applying a mechanical impact to at least one of the corona discharge electrode and the counter electrode. A gas purification device for a place that is characterized by: (32) A gas purification device according to any one of claims (1) to (31), characterized in that the corona electrode system is disposed within a casing of an electrostatic precipitator. (33) A gas purification device according to any one of claims (1) to (32), characterized in that the device is provided with means for forming a liquid film on the surface of the counter electrode or dust collecting electrode. Device. (34) The apparatus according to any one of claims (1) to (33), further comprising an additive injection device for adding a reaction accelerating additive to the gas to be purified in advance. Gas purification equipment for places where (35) The gas purification device according to claim (34), wherein the additive injection device is an ammonia injection device. (38) The apparatus according to any one of claims (1) to (35), characterized in that it is equipped with a gas pretreatment device for pretreating the gas to be purified. Gas purification equipment. (37) The gas purification device according to claim (36), wherein the gas pretreatment device is a gas cooling tower. (38) The apparatus according to any one of claims (1) to (37), characterized in that it is equipped with a gas post-processing device for further post-processing the purified gas. Device. (39) A gas purification device according to claim (38), wherein the gas post-treatment device is a gas absorption device for absorbing gas after reaction. (40) The gas purification device according to claim (39), wherein the gas post-treatment device is a dust collector.