KR102519053B1 - Desolvator system for measuring concentration of hydrochloric acid gas - Google Patents

Abstract

The present invention relates to a water pretreatment device for air pollution analysis, and more particularly, to a moisture pretreatment system for measuring the concentration of hydrochloric acid gas. To this end, an inlet tube 202 into which a sample gas containing hydrochloric acid gas is introduced; a preheater 203 disposed around the inlet tube 202; a first flow tube 230a vertically connected to the inlet tube 202; a plurality of flow pipes disposed in parallel with the first flow pipe 230a; a first connection tube 207 connecting the lower part of the first flow pipe 230a and the upper part of the adjacent flow pipe; A plurality of connecting tubes each connecting a lower flow pipe and an upper portion of an adjacent flow pipe; Peltier blocks 205 for cooling the first flow pipe 230a and the plurality of flow pipes; a regenerative heater interposed between the first flow pipe 230a and the Peltier block 205 and between each flow pipe and the Peltier block 205; an outlet tube 212 connected to an end of the flow tube disposed last among the plurality of flow tubes and discharging the sample gas from which moisture has been removed; A lamination pipe 213 connected to the lower part of the first flow pipe 230a and the lower part of the plurality of flow pipes, respectively, and combined into one; Solenoid valve 214 for opening and closing the laminated pipe 213; a water tank 216 accommodating liquid falling when the solenoid valve 214 is opened; and a vacuum pump 215 connected to the water tank 216. A water pretreatment device for measuring the concentration of hydrochloric acid gas is provided.

Description

Desolvator system for measuring concentration of hydrochloric acid gas}

The present invention relates to a water pretreatment device for air pollution analysis, and more particularly, to a moisture pretreatment system for measuring the concentration of hydrochloric acid gas.

In order to measure the concentration of the pollutant contained in the exhaust gas from the factory chimney or the atmosphere, sample gas is collected and the concentration of each component is analyzed. PMR (Particle Mobility Regulator, fine dust movement control device) or moisture preprocessor (Desolvator) continuously and automatically measures pollutants (e.g., fine dust, VOCs, hydrochloric acid gas, etc.) It is a device that removes only Since moisture (H ₂ O) is a very polar substance, analysis of odors with high polarity such as H ₂ S or (CH ₃ ) ₂ CCl ₂ or VOC (volatile organic compounds), concentration analysis of fine dust, or hydrochloric acid gas affect the concentration measurement. Therefore, removal of water before sampling or analysis is very important in sample analysis.

However, in the conventional PMR or dissolver, when the peltier is simply maintained at -15 ° C, a frosty material is formed inside the tube and at the same time, a large part of the hydrochloric acid gas is removed. On the other hand, when the hot sample gas of about 120 ° C is introduced while the Peltier temperature is slightly raised, such as about -3 ° C, the inside of the tube is partially dried, and the water removal effect of the tube is reduced.

Therefore, studies are being conducted to accurately measure the concentration of hydrochloric acid gas by effectively removing moisture from a chimney through which high-temperature gas of 80° C. or higher is continuously discharged.

In addition, when the absolute humidity of the sample gas collected from the chimney is high, the temperature is suddenly lowered during the moisture removal process, resulting in a mixed reaction between hydrochloric acid and moisture. This phenomenon has disadvantages in that it is difficult to accurately measure the concentration of hydrochloric acid gas and the retention time of the sample gas is increased.

7 is a graph showing the relationship between the retention time of the sample gas in the flow pipe and the recovery rate of hydrochloric acid gas in the water pretreatment device. As shown in FIG. 7, a high recovery rate of hydrochloric acid gas can be obtained only when the sample gas stays in the flow pipe for less than 0.1 second.

8 is a graph showing the relationship between the absolute humidity (v/v%) at the inlet side of the flow pipe and the relative humidity (%) of the outlet tube when the Peltier is operated in the water preprocessor. As shown in FIG. 8, it can be seen that the higher the absolute humidity (v/v%) at the inlet side of the flow tube, the higher the relative humidity of the outlet tube is 70% or more. Therefore, it can be seen that the conventional moisture preprocessor cannot accurately analyze the high humidity sample gas.

Therefore, research is needed to keep the residence time inside the flow pipe to less than 0.1 second while maximally suppressing the mixing reaction between hydrochloric acid and water.

1. Republic of Korea Patent Application No. 10-2018-0165721 (moisture removal device for air sample collection and air quality monitoring measurement), 2. Republic of Korea Patent Application No. 10-2012-0090044 (exhaust gas moisture removal device), 3. Japanese Patent Application No. 2007-538831 (Sampling device with moisture pretreatment means for air pollution analysis).

Therefore, the present invention has been made to solve the above problems, and the problem to be solved by the present invention is a moisture pretreatment system for measuring the concentration of hydrochloric acid gas so that the sample gas can stay in the flow pipe for less than 0.1 second. is to provide

Another object of the present invention is to provide a moisture pretreatment system for measuring the concentration of hydrochloric acid gas that allows a sample gas having a relative humidity of less than 70% to flow out of an outlet tube even when the absolute humidity of the incoming sample gas is high. .

Another object of the present invention is to provide a water pretreatment system for measuring the concentration of hydrochloric acid gas that can cross-operate a normal operation mode and a regeneration mode by having preprocessing modules in parallel.

However, the technical problems to be achieved in the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clear to those skilled in the art from the description below. You will be able to understand.

In order to achieve the above technical problem, the inlet tube 102 into which the sample gas containing hydrochloric acid gas is introduced; a preheater 103 disposed around the inlet tube 102; a flow tube 115 vertically connected to the inlet tube 102; Peltier block 105 for cooling the flow pipe 115; a regeneration heater 107 interposed between the flow pipe 115 and the peltier block 105; an outlet tube 109 connected to an end of the flow tube 115 and discharging sample gas from which moisture has been removed; A solenoid valve 110 that is vertically branched between the flow pipe 115 and the outlet tube 109 to open and close; a water tank 112 accommodating liquid falling when the solenoid valve 110 is opened; and a vacuum pump 111 connected to the water tank 112. A moisture pretreatment device for measuring the concentration of hydrochloric acid gas is provided.

In addition, as a second embodiment, the inlet tube 202 into which the sample gas 201 containing hydrochloric acid gas is introduced; a preheater 203 disposed around the inlet tube 202; a first flow tube 230a vertically connected to the inlet tube 102; a plurality of flow pipes disposed in parallel with the first flow pipe 230a; a first connection tube 207 connecting the lower part of the first flow pipe 230a and the upper part of the adjacent flow pipe; A plurality of connecting tubes each connecting a lower flow pipe and an upper portion of an adjacent flow pipe; Peltier blocks 205 for cooling the first flow pipe 230a and the plurality of flow pipes; a regenerative heater interposed between the first flow pipe 230a and the Peltier block 205 and between each flow pipe and the Peltier block 205; an outlet tube 212 connected to an end of the flow tube disposed last among the plurality of flow tubes and discharging the sample gas from which moisture has been removed; A lamination pipe 213 connected to the lower part of the first flow pipe 230a and the lower part of the plurality of flow pipes, respectively, and combined into one; Solenoid valve 214 for opening and closing the laminated pipe 213; a water tank 216 accommodating liquid falling when the solenoid valve 214 is opened; and a vacuum pump 215 connected to the water tank 216. A water pretreatment device for measuring the concentration of hydrochloric acid gas is provided.

In addition, the plurality of flow pipes are composed of the second flow pipe 230b and the third flow pipe 230c, and the connection tube is a second connection connecting the lower part of the second flow pipe 230b and the upper part of the third flow pipe 230c. tube 208.

In addition, the first upper fastener 204a connecting the inlet tube 202 and the upper portion of the first flow pipe 230a; a second upper fitting (204b) connecting the upper portion of the first connection tube (207) and the second flow pipe (230b); A third upper fastener 204c connecting the upper portion of the second connection tube 208 and the third flow pipe 230c; At least one contains Teflon.

In addition, the first lower fitting (220a) connecting the lower part of the first flow pipe (230a) and the first connection tube (207); a second lower fitting (220b) connecting the lower part of the second flow pipe (230b) and the second connection tube (208); A third lower fitting 220c connecting the lower part of the third flow pipe 230c and the outlet tube 212; and at least one of the first, second, and third lower fittings 220a, 220b, and 220c Contains Teflon.

In addition, a first outlet heater 211a installed around the first lower fastener 220a; and a second outlet heater 211b installed around the second lower fastener 220b.

In addition, the outlet tube 212 is further provided with a pressure sensor 218 used to select one of the normal operation mode and the regeneration mode.

As another embodiment of the present invention, a connection tube 302 into which a sample gas 301 containing hydrochloric acid gas is introduced; A first pre-processing module 1 including the above-described moisture pre-processing; a second pre-processing module 2 including the above-described moisture pre-processing; A first switching valve 319 installed in the connection tube 302; A first module pipe 330 connecting the first switching valve 319 and the inlet tube of the first preprocessing module 1; a second module tube 340 connecting between the first switching valve 319 and the inlet tube of the second preprocessing module 2; A second switching valve 320 to which the outlet tube of the first preprocessing module 1 and the outlet tube of the second preprocessing module 2 are connected; a water tank 316 to which the solenoid valve of the first preprocessing module 1 and the solenoid valve of the second preprocessing module 2 are commonly connected; And a vacuum pump 315 connected to the water tank 316; there is provided a moisture pretreatment device for measuring the concentration of hydrochloric acid gas, characterized in that it comprises a.

In addition, a first pressure sensor 380 installed in the outlet tube of the first preprocessing module 1; A second pressure sensor 390 installed in the outlet tube of the second preprocessing module 2; and a control unit for controlling the first preprocessing module 1 and the second preprocessing module 2 into one of a normal operation mode and a regeneration mode based on the signals of the first pressure sensor 380 and the second pressure sensor 390. include

In addition, another object of the present invention as described above is a method of operating a water pretreatment device for measuring the concentration of hydrochloric acid gas, in a normal operation mode when a sample gas containing hydrochloric acid gas is introduced into a connection tube. Turning on the operation of the preheater (103, 203), the outlet heater (108, 211a, 211b) and the Peltier block (105, 205) at the bottom of the flow pipe (S100); Turning off the vacuum pumps 111 and 215 (S120); and closing the solenoid valves 110 and 214 (S130), wherein the sample gas has a residence time of less than 0.1 second in the flow pipe, and the relative humidity of the sample gas from which moisture is removed is less than 70%. There is provided a method of operating a water pretreatment device for measuring the concentration of hydrochloric acid gas, characterized in that.

In addition, the temperature of the sample gas inside the flow pipe is in the range of -1 ° C to 0 ° C or the temperature of the flow pipe is in the range of -15 ° C to -10 ° C.

As another embodiment, in the method of operating the water pretreatment device for measuring the concentration of hydrochloric acid gas described above, in order to operate in the regeneration mode when the sample gas containing hydrochloric acid gas is introduced into the connection tube, the preheater (103, 203), maintaining the operation of the outlet heaters 108, 211a, 211b and the Peltier blocks 105 and 205 at the bottom of the flow pipe in an ON state (S210); Turning on the regeneration heaters 107, 210a, 210b, and 210c of the flow pipe (S220); turning on the vacuum pumps 111 and 215 for a first time (S230); opening the solenoid valves 110 and 214 for a second time shorter than the first time (S240); Turning off the vacuum pumps 111 and 215 (S250); closing the solenoid valves 110 and 214 (S260); and turning off the regeneration heaters 107, 210a, 210b, and 210c (S270).

And, the first time is in the range of 5 to 20 seconds, and the second time is in the range of 0.5 to 3 seconds.

In addition, in the opening step (S240) of the solenoid valves 110 and 214, the liquid melted and flowed from the first flow pipe 230a flows to the merging pipe 213, and the liquid melted and flowed from the second flow pipe 230b is combined. The liquid that flows into the branch pipe 213 and melts and flows down in the third flow pipe 230c flows into the lamination pipe 213 and is combined, and then passes through the solenoid valve 214.

An object of the present invention is another embodiment, in the operation method of the water pretreatment device for measuring the concentration of hydrochloric acid gas described above, the first and second switching valves 319 and 320 to communicate with the first pretreatment module 1 is opened (S300); The first pre-processing module 1 is executed in normal operation mode (S310); The step of executing the second pre-processing module 2 in a regeneration mode (S320); Switching the mode based on the output signals of the first and second pressure sensors 380 and 390 by the controller 400 (S330); opening the first and second switching valves 319 and 320 to communicate with the second preprocessing module 2 (S340); Executing the first pre-processing module 1 in a regeneration mode (S350); It can also be achieved by a method of operating a water pretreatment device for measuring the concentration of hydrochloric acid gas, characterized in that it includes;

According to one embodiment of the present invention, the formation of aerosol combined with hydrochloric acid gas and moisture can be maximally suppressed, and as a result, the sample gas can stay in the flow tube for less than 0.1 second. Therefore, it is possible to accurately analyze the concentration of hydrochloric acid gas with a high recovery rate of hydrochloric acid gas.

And, even if the absolute humidity of the sample gas is high, the sample gas having a relative humidity of less than 70% can flow out of the outlet tube by configuring the peltier in multiple stages.

In addition, by providing the pre-processing module in parallel, it is possible to cross-operate the normal operation mode and the regeneration mode. This allows continuous measurement or continuous analysis without stopping the measuring system.

However, the effects obtainable in the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention serve to further understand the technical idea of the present invention, the present invention is the details described in such drawings should not be construed as limited to
1 is a configuration diagram of a water pretreatment device for measuring the concentration of hydrochloric acid gas according to a first embodiment of the present invention;
Figure 2a is a configuration diagram of a water pretreatment device for measuring the concentration of hydrochloric acid gas according to a second embodiment of the present invention;
Figure 2b is an enlarged view of the main part of Figure 2a,
3 is a configuration diagram of a water pretreatment device for measuring the concentration of hydrochloric acid gas according to a third embodiment of the present invention;
4 is a flow chart showing when the moisture preprocessing apparatuses of the first, second, and third embodiments according to the present invention operate in a normal operation mode;
5 is a flow chart showing when the water preprocessing apparatuses of the first, second, and third embodiments according to the present invention operate in a regeneration mode;
6 is a flow chart showing when the water preprocessor according to the third embodiment of the present invention operates while being switched between a normal operation mode and a regeneration mode;
7 is a graph showing the relationship between the retention time of the sample gas in the flow pipe and the recovery rate of hydrochloric acid gas in the water pretreatment device;
8 is a graph showing the relationship between the absolute humidity (v / v%) at the inlet side of the flow pipe and the relative humidity (%) of the outlet tube when the Peltier is operated in the moisture pretreatment device;
9 is a graph showing the relationship between the absolute humidity (v / v%) of the sample gas and the recovery rate of hydrochloric acid gas in the water preprocessor according to the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, since the description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiment can be changed in various ways and can have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, the scope of the present invention should not be construed as being limited thereto.

The meaning of terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from another, and the scope of rights should not be limited by these terms. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element. It should be understood that when an element is referred to as “connected” to another element, it may be directly connected to the other element, but other elements may exist in the middle. On the other hand, when an element is referred to as being “directly connected” to another element, it should be understood that no intervening elements exist. Meanwhile, other expressions describing the relationship between components, such as “between” and “immediately between” or “adjacent to” and “directly adjacent to” should be interpreted similarly.

Singular expressions should be understood to include plural expressions unless the context clearly dictates otherwise, and terms such as “comprise” or “having” refer to a described feature, number, step, operation, component, part, or It should be understood that it is intended to indicate that a combination exists, and does not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Terms defined in commonly used dictionaries should be interpreted as consistent with meanings in the context of related art, and cannot be interpreted as having ideal or excessively formal meanings unless explicitly defined in the present invention.

of the first embodiment composition

Hereinafter, the configuration of the first embodiment will be described in detail with reference to the accompanying drawings. 1 is a block diagram of a water pretreatment device for measuring the concentration of hydrochloric acid gas according to a first embodiment of the present invention. As shown in FIG. 1, the inlet tube 102 is installed vertically so that the sample gas 101 containing hydrochloric acid gas is introduced.

The preheater 103 is disposed around the inlet tube 102 to heat the sample gas in the range of 60 to 150 °C. The preheater 103 may be an electric heater. Heating with the preheater 103 and cooling with the Peltier block 105 is to promote moisture removal using the Mpeva effect.

The Mpemba effect is a phenomenon in which water at a high temperature freezes faster than water at a lower temperature under the same cooling conditions. The covalent bond between the oxygen atom and the oxygen atom is lengthened and energy is accumulated. When this water is boiled, the hydrogen bond is lengthened and the density of the water is reduced. In other words, hot water that has accumulated a lot of energy freezes quickly because it releases energy faster when cooled.

The flow tube 115 is vertically connected to the inlet tube 102 through the fastener 104. The fastener 104 includes or is coated with a Teflon material to prevent corrosion and inhibit crystal growth.

The regeneration heater 107 is disposed to surround the circumference of the flow pipe 115 . The regeneration heater 107 functions to melt frost inside the flow pipe 115 by generating heat in the regeneration mode. The regeneration heater 107 does not operate in the normal operation mode.

A flow pipe 105 passes through the Peltier block 105. The peltier block 105 works in conjunction with the radiator 106 to cool the flow pipe 105 to -15 ° C to -10 ° C.

The outlet heater 108 is connected to the lower part of the flow pipe 115 and functions to heat the sample gas cooled in the normal operation mode to a predetermined temperature (about 25° C.).

The outflow tube 109 is connected to the lower end of the flow tube 115 and transfers the sample gas from which moisture has been removed to an analysis device (eg, a non-dispersive infrared ray detector). A pressure sensor 114 is installed inside the outlet tube 109 to determine when to switch between the normal operation mode and the regeneration mode by measuring the pressure drop.

It is branched vertically between the lower end of the flow pipe 115 and the outlet tube 109, and a solenoid valve 110 is installed in the pipe to open and close. ;

The water tank 112 is installed downstream of the solenoid valve 110 and receives liquid (eg, water) falling in the regeneration mode.

The vacuum pump 111 is connected to the water tank 112 to generate negative pressure for rapid discharge of water.

A check valve 113 is further included to drain the water tank 112.

Configuration of the second embodiment

Hereinafter, the configuration of the second embodiment will be described in detail with reference to the accompanying drawings. Figure 2a is a configuration diagram of a water pretreatment device for measuring the concentration of hydrochloric acid gas according to a second embodiment of the present invention, Figure 2b is an enlarged view of the main part of Figure 2a. As shown in Figures 2a and 2b,

A sample gas 201 containing hydrochloric acid gas is introduced into the inlet tube 202 installed vertically.

The first, second, and third flow pipes 230a, 230b, and 230c are parallel to each other and oriented in a vertical direction. The upper end of the first flow pipe 230a is connected to the inlet tube 202, and the lower end of the third flow pipe 230c is connected to the outlet tube 212.

The first, second, and third upper fastening parts 204a, 204b, and 204c are provided at the upper ends of the first, second, and third flow pipes 230a, 230b, and 230c, and the first, second, and third flow pipes 230a, 230b, and 230c ) are provided with first, second, and third lower fastening portions 220a, 220b, and 220c at the lower end of the. The first, second, and third upper fastening portions 204a, 204b, and 204c and the first, second, and third lower fastening portions 220a, 220b, and 220c include Teflon or are coated with Teflon.

The preheater 203 is an electric heater disposed around the inlet tube 202 .

The lower end of the first connection tube 207 is connected to the lower end of the first flow pipe 230a through the first lower fitting 220a, and the upper end is connected to the second flow pipe 230b through the second upper fitting 204b. connected to the top of

The lower end of the second connection tube 208 is connected to the lower end of the second flow pipe 230b through the second lower fitting 220b, and the upper end is connected to the third flow pipe 230c through the third upper fitting 204c. connected to the top of

Inside the Peltier block 205, the first, second, and third flow pipes 230a, 230b, and 230c are spaced apart from each other. The peltier block 205 cools the first, second, and third flow pipes 230a, 230b, and 230c.

The first regeneration heater 210a is arranged to wrap around the first flow pipe 230a, the second regeneration heater 210b is arranged to wrap around the second flow pipe 230b, and the third regeneration heater 210c ) is arranged to wrap around the third flow pipe 230c.

The first outlet heater 211a is an electric heater that wraps around the first lower fastener 220a, and the second outlet heater 211b is an electric heater that wraps around the second lower fastener 220b.

The first upper heater 209a is an electric heater that wraps around the second upper fastener 204b, and the second upper heater 209b is an electric heater that wraps around the third upper fastener 204c.

The outlet tube 212 is connected to the third lower fitting 220c and transfers the sample gas from which moisture has been removed to an analysis device (eg, a non-dispersive infrared ray detector). A pressure sensor 218 is installed inside the outlet tube 212 to determine when to switch between the normal operation mode and the regeneration mode by measuring the pressure drop.

The laminate pipe 213 is connected to the lower portions of the first, second, and third flow pipes 230a, 230b, and 230c, and the lower ends are coupled and connected to the solenoid valve 214.

The solenoid valve 214 is installed on the joint pipe 213 to open and close.

The water tank 216 is installed downstream of the solenoid valve 214 and receives liquid (eg, water) falling in the regeneration mode.

The vacuum pump 215 is connected to the water tank 216 to generate negative pressure for rapid discharge of water.

A check valve 217 is further included to drain the water tank 216.

In the second embodiment of the present invention, three flow tubes and two connection tubes were used, but in order to obtain a constant relative humidity for a high absolute humidity, the number of flow tubes may be one, two, four or more, and the connection Correspondingly, the tube may be provided. And, all of these flow pipes are embedded in the Peltier block.

Configuration of the third embodiment

Hereinafter, the configuration of the third embodiment will be described in detail with reference to the accompanying drawings. 3 is a block diagram of a water pretreatment device for measuring the concentration of hydrochloric acid gas according to a third embodiment of the present invention. As shown in FIG. 3, the water preprocessing device according to the second embodiment becomes a first preprocessing module 1, and a second preprocessing module 2 identical to the first preprocessing module 1 is provided in parallel.

Sample gas 301 is introduced into the connection tube 302, and the connection tube 302 is connected to the first switching valve 319. The first and second switching valves 319 and 320 may be three-way valves operated by the control unit 400 .

One end of the first module tube 330 is connected to the first switching valve 319, and the other end is connected to the inlet tube of the first preprocessing module 1. One end of the second module pipe 340 is connected to the first switching valve 319, and the other end is connected to the inlet tube of the second preprocessing module 2.

The outlet tube of the first preprocessing module 1 and the outlet tube of the second preprocessing module 2 are connected to the second switching valve 320, and the final outlet tube 312 is connected to the second switching valve 320. .

The first pressure sensor 380 is installed in the outlet tube of the first preprocessing module 1 to measure the pressure decrease, and the second pressure sensor 390 is installed in the outlet tube of the second preprocessing module 2 to decrease the pressure. to measure The controller 400 determines a transition time between the normal operation mode and the regeneration mode based on the measurement signals of the first and second pressure sensors 380 and 390 .

The first lamination pipe 350 is connected to the solenoid valve of the first preprocessing module 1, the second lamination pipe 360 is connected to the solenoid valve of the second preprocessing module 2, and the lower end is connected to the water tank 316. ) is connected to

The water tank 316 is installed downstream of the first and second laminating pipes 350 and 360 to accommodate liquid (eg, water) falling in the regeneration mode.

The vacuum pump 315 is connected to the water tank 316 to generate negative pressure for quick discharge of water. A check valve 317 is further included to drain the water tank 316.

In the third embodiment of FIG. 3, two preprocessing modules are disclosed and described, but three or more preprocessing modules may be installed and operated in parallel or in series according to capacity.

No. 1 Example movement

Hereinafter, the operation of the first embodiment will be described in detail with reference to the accompanying drawings. 4 is a flow chart showing when the water pretreatment device of the first embodiment according to the present invention operates in a normal operation mode. As shown in FIG. 4, the preheater 103, the outlet heater 108 under the flow pipe, and the Peltier block 105 are first turned on (S100). The preheater 103 is heated in the range of 60 to 150°C, and the outlet heater 108 heats the sample gas to 25°C. The Peltier block 105 is cooled so that the temperature of the sample gas inside the flow pipe 115 is in the range of -1 ° C to 0 ° C or the temperature of the flow pipe 115 is in the range of -15 ° C to -10 ° C.

Then, the vacuum pump 111 is turned off (S120).

Then, the solenoid valve 110 is closed (S130).

Then, the sample gas containing hydrochloric acid gas and high humidity is collected from the chimney, heated in the preheater 103, and then cooled in the flow pipe 115 to phase-separate and remove moisture into frost. At this time, the sample gas 101 has a residence time of less than 0.1 second in the flow pipe 115, and the relative humidity of the sample gas from which moisture is removed becomes less than 70% and flows out through the outlet tube 109. Thereafter, an analysis device (eg, a non-dispersive infrared ray meter) can accurately analyze the concentration of hydrochloric acid gas by analyzing the dry sample gas.

In the regeneration mode of the first embodiment, the regeneration heater 107 operates to melt ice or frost grown inside the flow pipe 115 . Water generated by melting ice or frost flows down and is accommodated in the water tank 112 as the solenoid valve 110 opens.

Operation of the second embodiment

Hereinafter, the operation of the second embodiment will be described in detail with reference to the accompanying drawings. First, the normal operation mode of the second embodiment will be described. Similar to the first embodiment, the operations of the preheater 203, the first and second outlet heaters 211a and 211b, and the Peltier block 205 are turned on. Then, the vacuum pump 215 is turned off and the solenoid valve 214 is closed.

Then, the sample gas containing hydrochloric acid gas and high humidity is generated and collected from the chimney, heated in the preheater 203, and then passed through the first flow pipe 230a, the first connection tube 207, and the second flow pipe 230b. ), the second connection tube 208 and the third flow tube 230c are sequentially passed. Due to the increased contact area between the sample gas and the first, second, and third flow tubes 230a, 230b, and 230c, a lot of moisture can be removed while phase-changing into frost or ice. In particular, the hydrochloric acid gas present in the sample gas can be maintained in the gas phase by being heated between the first flow pipe 230a and the first connection tube 207 by the first outlet heater 211a. However, when cooling without heating, hydrochloric acid can be largely removed from the first connection tube 207 . In this way, cooling and heating are repeated throughout. During cooling, more ice or frost is generated by accelerating the negative effect.

Hereinafter, the playback mode of the second embodiment will be described. 5 is a flow chart showing when the water preprocessor according to the second embodiment of the present invention operates in a regeneration mode. As shown in FIG. 5, first, the operation of the preheater 203, the first and second outlet heaters 211a and 211b at the bottom of the flow pipe, and the Peltier block 205 are maintained in an ON state (S210).

Next, the first, second, and third regeneration heaters 210a, 210b, and 210c are turned on (S220). Then, after the ice or frost inside the flow pipe melts and turns into water, it flows down and gathers at the top of the solenoid valve 214. That is, the water flowing down from the first flow pipe 230a is collected on the upper part of the solenoid valve 214 through the laminated pipe 213, and the water flowing down from the second flow pipe 230b passes through the combined pipe 213 to the solenoid valve. 214, and the water flowing down from the third flow pipe 230c is collected on the top of the solenoid valve 214 through the lamination pipe 213.

Then, the vacuum pump 215 is turned on for 10 seconds (S230). This is to form a sufficient negative pressure.

Then, the solenoid valve 214 is opened for 1 second (S240). This is to absorb water and ice by means of a shock wave by allowing an instantaneous negative pressure to act.

Then, the vacuum pump 215 is turned off (S250).

Then, the solenoid valve 214 is closed (S260), and the first, second, and third regeneration heaters 210a, 210b, and 210c are turned off (S270).

Through this process, the cross sections of the first, second, and third flow pipes 230a, 230b, and 230c are restored. This reproduction mode is equally applied to the first and third embodiments as well as the second embodiment.

Operation of the third embodiment

Hereinafter, the operation of the third embodiment will be described in detail with reference to the accompanying drawings. FIG. 6 is a flow chart showing when the water preprocessor according to the third embodiment of the present invention operates while being switched between a normal operation mode and a regeneration mode. As shown in FIG. 6 , the controller 400 opens the first and second switching valves 319 and 320 to communicate with the first preprocessing module 1 (S300).

Then, the first pre-processing module 1 is executed in normal operation mode (S310). Accordingly, the sample gas is discharged through the final outlet tube 312 after moisture is removed in the first preprocessing module 1 .

Then, the second pre-processing module 2 is executed in the regeneration mode (S320). That is, ice or frost is melted in the second preprocessing module 2 and discharged to the water tank 316 through the second laminating pipe 360 .

Then, the controller 400 switches the mode based on the output signals of the first and second pressure sensors 380 and 390 (S330). That is, when the pressure of the first pressure sensor 380 is lowered, it is determined that the mode switching time has come.

Next, the controller 400 opens the first and second switching valves 319 and 320 to communicate with the second preprocessing module 2 (S340).

Then, the first pre-processing module 1 is executed in the regeneration mode (S350), and the second pre-processing module 2 is executed in the normal operation mode (S360).

Then, the control unit 400 switches the mode based on the output signals of the first and second pressure sensors 380 and 390 (S330) to remove moisture without interruption by the first and second preprocessing modules 1 and 2. can be done

Experiment result

9 is a graph showing the relationship between the absolute humidity (v / v%) of the sample gas and the recovery rate of hydrochloric acid gas in the water preprocessor according to the present invention. As shown in FIG. 9, it can be confirmed that the hydrochloric acid gas recovery rate is 90% or more even if the introduced sample gas has high humidity. This means that moisture can be sufficiently removed even in a sample gas in a high humidity state, while hydrochloric acid gas can be recovered almost as it is and used for accurate concentration analysis.

Detailed descriptions of the preferred embodiments of the present invention disclosed as described above are provided to enable those skilled in the art to implement and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the scope of the present invention. For example, those skilled in the art can use each configuration described in the above-described embodiments in a manner of combining with each other. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention. The invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that do not have an explicit citation relationship in the claims may be combined to form an embodiment or may be included as new claims by amendment after filing.

1: first preprocessing module, 2: second preprocessing module,
101: sample gas, 102: inlet tube,
103: preheater, 104: fastener,
105: peltier block, 106: radiator,
107: regeneration heater, 108: outlet heater,
109: outlet tube, 110: solenoid valve,
111: vacuum pump, 112: water tank,
113: check valve, 114: pressure sensor,
115: flow pipe, 201: sample gas,
202: inlet tube, 203: preheating heater,
204a, 204b, 204c: first, second, third upper fasteners,
205: peltier block, 206: radiator,
207: first connecting tube, 208: second connecting tube,
209a, 209b, 209c: first, second, third upper heaters,
210a, 210b, 210c: first, second, third regeneration heaters,
211a, 211b: first and second outlet heaters, 212: outlet tube,
213: laminate pipe, 214: solenoid valve,
215: vacuum pump, 216: water tank,
217: check valve, 218: pressure sensor,
220a, 220b, 220c: first, second, third lower fasteners,
230a, 230b, 230c: first, second, third flow pipe;
301: sample gas, 302: connection tube,
312: final outflow tube, 315: vacuum pump,
316: water tank, 317: check valve,
319: first switching valve, 320: second switching valve,
330: first module pipe, 340: second module pipe,
350: first joint pipe, 360: second joint pipe,
380: first pressure sensor, 390: second pressure sensor,
400: control unit.

Claims (15)

delete an inlet tube 202 into which a sample gas containing hydrochloric acid gas is introduced;
a preheater 203 disposed around the inlet tube 202;
a first flow pipe 230a vertically connected to the inlet tube 202;
a plurality of flow pipes disposed in parallel with the first flow pipe 230a;
a first connection tube 207 connecting a lower portion of the first flow pipe 230a and an upper portion of the adjacent flow pipe;
a plurality of connecting tubes each connecting a lower part of the flow pipe and an upper part of the adjacent flow pipe;
a peltier block 205 for cooling the first flow pipe 230a and the plurality of flow pipes;
a regeneration heater 210a interposed between the first flow pipe 230a and the peltier block 205 and between each flow pipe and the peltier block 205;
an outlet tube 212 connected to an end of the flow tube disposed last among the plurality of flow tubes and discharging the sample gas from which moisture has been removed;
a lamination pipe 213 connected to the lower part of the first flow pipe 230a and the lower part of the plurality of flow pipes, respectively, and joined into one;
A solenoid valve 214 for opening and closing the laminate pipe 213;
a water tank 216 accommodating liquid falling when the solenoid valve 214 is opened; and
Including a vacuum pump 215 connected to the water tank 216,
The plurality of flow pipes are composed of a second flow pipe 230b and a third flow pipe 230c,
The connection tube is a second connection tube 208 connecting the lower part of the second flow pipe 230b and the upper part of the third flow pipe 230c,
a first upper fastener 204a connecting the inlet tube 202 and the upper portion of the first flow pipe 230a;
a second upper fitting 204b connecting the first connection tube 207 and the upper portion of the second flow pipe 230b;
A third upper fastener 204c connecting the second connection tube 208 and the upper portion of the third flow pipe 230c; further comprising,
At least one of the first, second, and third upper fasteners 204a, 204b, and 204c includes Teflon. delete delete According to claim 2,
a first lower fitting 220a connecting the lower portion of the first flow pipe 230a and the first connection tube 207;
a second lower fitting 220b connecting the lower part of the second flow pipe 230b and the second connection tube 208;
A third lower fastener 220c connecting the lower part of the third flow pipe 230c and the outlet tube 212; further comprising,
Water pretreatment device for measuring the concentration of hydrochloric acid gas, characterized in that at least one of the first, second, and third lower fasteners (220a, 220b, 220c) includes Teflon. According to claim 5,
a first outlet heater 211a installed around the first lower fastener 220a; and
Moisture pretreatment device for measuring the concentration of hydrochloric acid gas, characterized in that it further comprises; a second outlet heater (211b) installed around the second lower fastener (220b). According to claim 2,
Water pretreatment device for measuring the concentration of hydrochloric acid gas, characterized in that the outlet tube is further provided with a pressure sensor used to select one of the normal operation mode and the regeneration mode. A connecting tube 302 into which a sample gas containing hydrochloric acid gas is introduced;
A first pretreatment module (1) comprising a water pretreatment according to any one of claims 2 and 5 to 7;
A second pre-processing module (2) comprising water pre-treatment according to any one of claims 2 and 5 to 7;
a first switching valve 319 installed in the connection tube 302;
a first module pipe 330 connecting between the first switching valve 319 and the inlet tube of the first preprocessing module 1;
a second module tube 340 connecting between the first switching valve 319 and the inlet tube of the second preprocessing module 2;
A second switching valve 320 to which the outlet tube of the first preprocessing module 1 and the outlet tube of the second preprocessing module 2 are connected;
a water tank 316 to which the solenoid valve of the first preprocessing module 1 and the solenoid valve of the second preprocessing module 2 are commonly connected;
a vacuum pump 315 connected to the water tank 316;
A first pressure sensor 380 installed in the outlet tube of the first preprocessing module 1;
A second pressure sensor 390 installed in the outlet tube of the second preprocessing module 2; and
Based on the signals of the first pressure sensor 380 and the second pressure sensor 390, the first preprocessing module 1 and the second preprocessing module 2 are controlled to one of a normal operation mode and a regeneration mode. Moisture pretreatment device for measuring the concentration of hydrochloric acid gas, characterized in that it comprises a; control unit. delete delete delete In the method of operating the water pretreatment device for measuring the concentration of hydrochloric acid gas according to claim 2,
In order to operate in the regeneration mode when the sample gas containing the hydrochloric acid gas is introduced into the connection tube,
Maintaining the operation of the preheater (103, 203), the outlet heater (108, 211a, 211b) and the Peltier block (105, 205) at the bottom of the flow pipe in an ON state (S210);
Turning on the regeneration heaters 107, 210a, 210b, and 210c of the flow pipe (S220);
turning on the vacuum pumps 111 and 215 for a first time (S230);
opening the solenoid valves 110 and 214 for a second time shorter than the first time (S240);
Turning off the vacuum pumps 111 and 215 (S250);
closing the solenoid valves 110 and 214 (S260); and
Turning off the regeneration heaters 107, 210a, 210b, 210c (S270); includes,
The first time is in the range of 5 to 20 seconds, the second time is in the range of 0.5 to 3 seconds,
In the opening step (S240) of the solenoid valves 110 and 214,
The liquid melted and flowing down in the first flow pipe 230a flows into the lamination pipe 213,
The liquid melted and flowing down in the second flow pipe 230b flows into the lamination pipe 213,
The water pretreatment device for measuring the concentration of hydrochloric acid gas, characterized in that the liquid melting and flowing down in the third flow pipe (230c) flows into the sump pipe 213 and then passes through the solenoid valve 214. Method of operation. delete delete delete

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