CN1704746A - Device for collecting and monitoring particles of solid source discharged gas - Google Patents
Device for collecting and monitoring particles of solid source discharged gas Download PDFInfo
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- CN1704746A CN1704746A CN 200410042746 CN200410042746A CN1704746A CN 1704746 A CN1704746 A CN 1704746A CN 200410042746 CN200410042746 CN 200410042746 CN 200410042746 A CN200410042746 A CN 200410042746A CN 1704746 A CN1704746 A CN 1704746A
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Abstract
A gas particle discharged from a solid source collect and monitor device includes an equal speed sampling head, a thin cavity, a stationary chamber, a sampler and a central controller, among which, the output of the sampling head is connected with the thin cavity, one end of which is connected with a zero air generator, the other end is connected with a fan, a collecting tube is set at its outside and connected with the stationary chamber, the sampler includes a cyclone, separator, a film support, a quality flow meter and a sampling pump, said cyclone separator is set inside of the lower part of the stationary chamber, its output passes through said stationary chamber and the support, the flow meter is serial to the sampling pump, the signal end of the central controller is electrically connected with the flow meter, the heating tube, an orifice flow meter, the zero air generator, the fan and the signal end of the sampler.
Description
Technical field
The present invention relates to a kind of particle and gather monitoring device, the finely ground particles that is contained in especially a kind of gas at the stationary source discharging carries out isokinetic sampling's monitoring device.
Background technology
The soot emissions of stationary source are the important roots that causes atmospheric pollution, especially the particle that those particles are tiny, surface area is bigger, they are carrying out various complexity in long transmission course physics, chemical change cause adverse influence to health.
Monitoring for the stationary source emission gases is the formation mechanism of research atmospheric pollution, the important means of control polluted smoke emissions.At present, the monitoring device that stationary source is implemented mainly contain the predicted velocity method smoke dust sampling instrument that is used for short-term test, static balance velocimetry smoke dust sampling instrument, kinetic pressure balancing velocimetry smoke dust sampling instrument, from motion tracking exhaust stream speed smoke dust sampling instrument, dust concentration velocity test instrument etc. and the opaque luminosity method that is used for long-term test measure the dust concentration continuous monitor system, scattered light method is measured dust concentration continuous monitor system etc. backward.These instruments and system more or less exist can not gather aerosol sample, can't carry out organic, element, ion analysis, can not carry out the flue dust particle diameter and cut apart sampling, can not measure the defectives such as true form of flue dust in being discharged into atmospheric environment.
Why needing to carry out the flue dust particle diameter and cut apart sampling, is because when particle during less than PM10, flue dust is more serious to the pollution of atmosphere, wherein the particle less than PM2.5 can directly enter the human body alveolar, virus is brought into, so, particularly important to the employing research of finely ground particles in the flue dust.
The reason that can not measure the true form of soot emissions in the atmospheric environment is: to the unusual difficulty of organic aerocolloidal mensuration.Because the ratio of gasoloid in two-phase is along with its temperature in atmosphere and the variation of dilute strength change.When temperature was higher in the flue, the gasoloid under the normal temperature existed with gaseous state often, and therefore existing monitoring device can't directly be caught gasoloid from flue.
Summary of the invention
Technical matters to be solved by this invention is at above-mentioned various short-terms, the existing many defectives of long term monitoring Apparatus and system provide a kind of particle of stationary source emission gases to gather monitoring device, this device dilutes the stationary source discharged flue gas by the constant speed collection, and the diffusion of simulated flue gas in atmosphere, distribution between solid phase and the gas phase and fine particle thing Surface Physical, chemical change process, thereby obtain the discharging parameter of various contamination particles in the fume emission accurately, be the analysis of further stationary source being discharged, control provides true and reliable data.
Technical matters to be solved by this invention is achieved through the following technical solutions:
A kind of particle of stationary source emission gases is gathered monitoring device, and it comprises isokinetic sampling's head, dilution chamber, chamber, sampling thief and central controller.
The endpiece of isokinetic sampling's head is communicated with described dilution chamber by the heating tube that flowmeter is installed.
Dilution chamber is the pipeline of a sealing, its end near heating tube is connected with the zero air generator that is used for additional pure air in pipeline by an orifice flowmeter, its other end is connected with blower fan, and be provided with the collection tube of an end and its internal communication in the outside that is positioned at this end, the other end of this collection tube is communicated with the top of described chamber.Chamber is the sealing cylindrical container.
Sampling thief comprises that film holder, mass rate that cyclone separator, inside are equipped with sampling film take into account sampling pump, and this cyclone separator is arranged on described chamber lower inside, and its endpiece passes described chamber and takes into account sampling pump and be connected in series with film holder, mass rate.
The signal end of the signal end of central controller and described flowmeter, heating tube, orifice flowmeter, zero air generator, blower fan and sampling thief is electrically connected.
During use, isokinetic sampling's head is inserted smokejack, adjust blower fan and make the gas flow sum that enters dilution chamber by isokinetic sampling's head, zero air generator equal to flow out the gas flow sum of dilution chamber by collection tube and blower fan.Enter dilution chamber contain particle gas through with the diluting effect of pure air, simulated the real situation of flue gas to airborne release.Flue dust after the dilution enters chamber, behind the physics of particle process certain hour, the chemical change, its particle nucleation is grown up, at last, being sampled film by the cyclone separator in the sampling thief collects, and sampled data signal is outputed to central controller by mass flowmeter, carry out mathematical analysis subsequently.
In this device, the flow of sampling is controlled by mass flowmeter.Entering chamber unnecessary gas in addition discharges by blower fan.
Be accurate Control Flow, guarantee the isokinetic sampling, flowmeter adopts Venturi meter, also is provided with venturi differential pressure pickup and venturi temperature sensor on this flowmeter, and the signal output part of these sensors is connected with the signal input part of central controller.
For the dilution effect of guaranteeing flue gas is identical with real atmosphere nature dilution effect, dilution chamber adopts one to fall " U " type stainless-steel tube and make, and sampling flue gas and the pure air that dilutes usefulness mix mutually, and turbulization reaches the effect of abundant dilution.
Zero air generator involved in the present invention is that an inside is provided with filtering layer, and the surface has the casing of air admission hole.Filtering layer adopts coarse filtration net and filtering materials such as HEPA filter courage and activated charcoal to form, can be effectively with airborne particle removal.
According to the specific requirement of sampling, can use many group sampling thiefs, these sampling thiefs are uniformly set at the bottom of chamber, can sample respectively at the particle of different-grain diameter.
By technique scheme as can be seen, flue dust and the pure air mixed diluting of the present invention by the isokinetic sampling is obtained, and leaving standstill by chamber, accurately and real simulated the flue dust process that in atmosphere, spreads, grow up, change, to carrying out collection analysis through the particle that changes, just can obtain the discharging parameter of flue dust, thereby, also beat next solid foundation simultaneously for work such as air source parsings for preventing and controlling that stationary source soot emissions work provides truly, reliable Monitoring Data.
Description of drawings
Figure 1 shows that the structural representation of a preferred embodiment provided by the present invention;
Figure 2 shows that the flue gas flow direction synoptic diagram of the foregoing description.
Embodiment
Below, also the present invention is described in further detail in conjunction with the accompanying drawings by a preferred embodiment.
As shown in Figure 1, preferred embodiment provided by the present invention comprises isokinetic sampling 1, dilution chamber 4, chamber 5, sampling thief and central controller 20.
Isokinetic sampling's 1 endpiece is communicated with dilution chamber 4 by the heating tube 2 that Venturi meter 3 is installed.
The other end of dilution chamber 4 is connected with blower fan 11 by a filtrator 10.Be provided with the collection tube 12 of an end and dilution chamber 4 internal communication in the outside that is positioned at this end, the other end of this collection tube 12 is communicated with chamber 5.Chamber 5 is the cylindrical vessels that adopt stainless steel material to make, and its top is provided with air intake opening, and this air intake opening is communicated with dilution chamber 4 by collection tube 12.
Among the present invention, sampling thief comprises that cyclone separator 6, inside are equipped with the film holder 7 of sampling film, mass flowmeter 8 and sampling pump 9.Cyclone separator 6 is arranged on chamber 5 lower inside, and its endpiece passes chamber 5 and is connected in series with film holder 7, mass flowmeter 8 and sampling pump 9.
The signal end of the signal end of central controller 20 and above-mentioned Venturi meter 3, heating tube 2, orifice flowmeter 13, zero air generator 14, blower fan 11 and sampling thief is electrically connected (omitted the concrete signal connection line among the figure, this industry those of ordinary skill that is connected to is known).
In the said structure, isokinetic sampling 1 is made by stainless steel material.Isokinetic sampling 1 the inlet end outside is tapered, and the endpiece surface has the connecting portion that is connected with heating tube 2, is cylindric in the inlet end of this constant speed sampling head, and to the tapered (not shown) of gradually opening of endpiece.For adapting to different sampling requests, can have the different isokinetic sampling of a plurality of inlet diameters 1, its inlet diameter can be set to 3mm-10mm.
On Venturi meter 3, also be provided with venturi differential pressure pickup and venturi temperature sensor (not shown).The signal output part of venturi differential pressure pickup and venturi temperature sensor is connected with the signal input part of central controller 20, in order to pressure, the temperature parameter of acquisition stream flue gas in Venturi meter 3.
For guaranteeing the accuracy of data acquisition and observation process, on dilution chamber 4, also be provided with dilution back pressure transducer 41, dilution back temperature sensor 42 and humidity sensor 43.The signal output part of above-mentioned each sensor all is connected with the signal input part of central controller 20.
In the present embodiment, chamber 5 is provided with eight groups of sampling thiefs, wherein four groups of collections that are used for the PM2.5 particle, four groups of collections that are used for the PM10 particle.Eight groups of sampling thiefs are uniformly set at the outside, bottom of chamber 5.
In use, isokinetic sampling 1 is arranged in the chimney 21, its inlet end is the flue gas to flowing forward downwards.Flue gas enters present embodiment by isokinetic sampling 1, and its flow process is with reference to figure 2.For avoiding the loss of particle, with heating tube 2 heating, and under the temperature of 120 degree, flue gas is imported dilution chamber 4, its flow is measured as Q1 by Venturi meter 3.
Extraneous air enters zero air generator 14 and enters dilution chamber 4 by this generator under the effect of blower fan 11, and its flow obtains to be Q2 by orifice flowmeter 13.
In dilution chamber 4, flue gas and zero air mixed, and, obtain fully dilution falling turbulization under the effect of " U " type pipe, and its part enters in the chamber 5 by collection tube 12, and its flow is Q3.
Unnecessary gas carries out big flow shunting by blower fan 11, and its flow is Q4.
By adjusting blower fan 11, can control the flow of the whole device of flowing through, and make Q1+Q2=Q3+Q4.
Enter diluted flue gas in the chamber 5 through after a while stop, particle nucleation is gradually grown up, and solid phase and gas phase are redistributed, and at this moment, gather by the particle after 6 pairs of variations of cyclone separator of sampling thief.Mass flowmeter 8 is transferred to central controller 20 with sampled data.9 of sampling pumps provide sampling air flow.
Present embodiment can also change the throughput ratio of diluent air and flue gas by adjusting the ball valve in zero air generator 14, thereby gathers the particle that forms under the different extension rates.
Present embodiment has been realized the isokinetic sampling of flue dust, and the particle state of collection has reduced the loss of particle in experiment to greatest extent near the state of flue dust in atmosphere, has thoroughly overcome the existing various defectives of existing atmosphere flue dust pick-up unit and system.
The central controller that employing is made up of computing machine makes the data that obtain more true and reliable, and makes operation, precise control, the convenience of whole device
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1, a kind of particle of stationary source emission gases is gathered monitoring device, and it is characterized in that: it comprises isokinetic sampling's head, dilution chamber, chamber, sampling thief and central controller; The endpiece of described isokinetic sampling's head is communicated with described dilution chamber by the heating tube that flowmeter is installed; Described dilution chamber is the pipeline of a sealing, its end near heating tube is connected with the zero air generator that is used for additional pure air in pipeline by an orifice flowmeter, its other end is connected with blower fan, and be provided with the collection tube of an end and its internal communication in the outside that is positioned at this end, the other end of this collection tube is communicated with the top of described chamber; Described chamber is the sealing cylindrical container;
Described sampling thief comprises that film holder, mass rate that cyclone separator, inside are equipped with sampling film take into account sampling pump, this cyclone separator is arranged on described chamber lower inside, and its endpiece passes described chamber and takes into account sampling pump and be connected in series with film holder, mass rate;
The signal end of the signal end of described central controller and described flowmeter, heating tube, orifice flowmeter, zero air generator, blower fan and sampling thief is electrically connected.
2, the particle of stationary source emission gases according to claim 1 is gathered monitoring device, it is characterized in that: described isokinetic sampling's head is made by stainless steel material, its inlet end outside is tapered, the endpiece surface has the connecting portion that is connected with other pipelines, be cylindric in the inlet end of this constant speed sampling head, and gradually open to endpiece is tapered, its inlet diameter is 3mm-10mm.
3, the particle of stationary source emission gases according to claim 1 and 2 is gathered monitoring device, and it is characterized in that: described flow is counted Venturi meter, and this flowmeter is provided with venturi differential pressure pickup and venturi temperature sensor; The signal output part of described venturi differential pressure pickup and venturi temperature sensor is connected with the signal input part of described central controller.
4, the particle of stationary source emission gases according to claim 1 is gathered monitoring device, it is characterized in that: described dilution chamber is one to fall " U " type stainless-steel tube, and its length is 10 times of its diameter.
5, gather monitoring device according to the particle of claim 1 or 4 described stationary source emission gases, it is characterized in that: also have additional filtrator between the other end of described dilution chamber and the described blower fan.
6, gather monitoring device according to the particle of claim 1 or 4 described stationary source emission gases, it is characterized in that: also be provided with dilution back pressure transducer, dilution back temperature sensor and humidity sensor on the described dilution chamber; The signal output part of each sensor all is connected with the signal input part of described central controller.
7, gather monitoring device according to the particle of claim 1 or 2 or 4 described stationary source emission gases, it is characterized in that: described zero air generator is that an inside is provided with filtering layer, and the surface has the casing of air admission hole.
8, the particle of stationary source emission gases according to claim 1 is gathered monitoring device, it is characterized in that: described chamber is the cylindrical vessel made from stainless steel material, its top is provided with air intake opening, and this air intake opening is communicated with described dilution chamber by described collection tube.
9, the particle of stationary source emission gases according to claim 1 is gathered monitoring device, and it is characterized in that: described sampling thief is more than one group, organizes even distribution of sampling thief more the bottom of described chamber is set.
10, gather monitoring device according to the particle of claim 1 or 8 or 9 described stationary source emission gases, it is characterized in that: described cyclone separator is PM2.5 cyclone separator and/or PM10 cyclone separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100427465A CN1330958C (en) | 2004-05-25 | 2004-05-25 | Device for collecting and monitoring particles of solid source discharged gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100427465A CN1330958C (en) | 2004-05-25 | 2004-05-25 | Device for collecting and monitoring particles of solid source discharged gas |
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| CN1704746A true CN1704746A (en) | 2005-12-07 |
| CN1330958C CN1330958C (en) | 2007-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100427465A Expired - Fee Related CN1330958C (en) | 2004-05-25 | 2004-05-25 | Device for collecting and monitoring particles of solid source discharged gas |
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| CN103308649A (en) * | 2013-01-17 | 2013-09-18 | 清华大学 | Multi-channel multi-component stationary source sampling and analysis system |
| CN103323292A (en) * | 2013-06-09 | 2013-09-25 | 上海大学 | Acquisition system for collecting particles of different particle size discharged by fire coal |
| CN104075913A (en) * | 2014-07-17 | 2014-10-01 | 北京航空航天大学 | Dilution sampling device for PM2.5 discharged by stationary pollution source |
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| CN104729890A (en) * | 2015-03-24 | 2015-06-24 | 南京埃森环境技术有限公司 | PM2.5 (Particulate Matter 2.5) source analyzing and sampling device based on flow feedback control |
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| ATE330221T1 (en) * | 2000-05-25 | 2006-07-15 | Her Majesty The Queen In The R | DEVICE AND METHOD FOR EMISSION SAMPLING |
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| CN103308649A (en) * | 2013-01-17 | 2013-09-18 | 清华大学 | Multi-channel multi-component stationary source sampling and analysis system |
| CN103323292A (en) * | 2013-06-09 | 2013-09-25 | 上海大学 | Acquisition system for collecting particles of different particle size discharged by fire coal |
| CN104075913A (en) * | 2014-07-17 | 2014-10-01 | 北京航空航天大学 | Dilution sampling device for PM2.5 discharged by stationary pollution source |
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