KR102519054B1 - Hybrid system of napion dryer and desolvator system for measuring concentration of hydrochloric acid gas - Google Patents

Abstract

The present invention relates to a combined system of a Nafion dryer and a moisture pretreatment device. To this end, (i-1) an inlet tube 102 through which the sample gas is introduced; (i-2) a preheater 103 disposed around the inlet tube 102; (i-3) a flow tube 120 vertically connected to the inlet tube 102; (i-4) a peltier block 105 for cooling the flow pipe 120; (i-5) a regeneration heater 107 interposed between the flow pipe 120 and the peltier block 105; (i-6) a connection pipe 115 connected to an end of the flow pipe 120 to deliver the sample gas from which moisture has been removed; (i-7) a solenoid valve 110 that is vertically branched between the flow pipe 120 and the connection pipe 115 and opens and closes; (i-8) a water tank 112 accommodating liquid falling when the solenoid valve 110 is opened; and (i-9) a water pre-treatment device including a vacuum pump 111 connected to the water tank 112; and (ii) one end connected to the connection pipe 115 and the other end connected to the outlet tube 114. A combined system of a Nafion dryer and a moisture pretreatment device is provided, characterized in that it includes a Nafion dryer 117 for forming and having an inlet 116 and an outlet 118 for drying gas to remove moisture.

Description

Combination system of napion dryer and moisture pretreatment device {Hybrid system of napion dryer and desolvator system for measuring concentration of hydrochloric acid gas}

The present invention relates to a moisture preprocessor for air pollution analysis, and more particularly, to a combined system of a Nafion dryer and a moisture preprocessor 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.

On the other hand, in the conventional moisture pretreatment device, the higher the absolute humidity (v/v%) at the inlet side of the flow pipe, the higher the relative humidity of the outlet tube is as high as 70% or more. Therefore, the conventional moisture preprocessor could not accurately analyze the high humidity sample gas. Therefore, research is being conducted to maximize the recovery rate of hydrochloric acid gas by removing most of the water or moisture while suppressing the mixed reaction between hydrochloric acid and water as much as possible.

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 to remove almost most of the water or moisture while suppressing the mixing reaction phenomenon of hydrochloric acid and water in the sample gas as much as possible, It is to provide a combined system of a Nafion dryer and a moisture pretreatment device that can maximize the recovery rate.

Another object of the present invention is to provide a combination system of a Nafion dryer and a moisture pretreatment device that allows a sample gas having a relative humidity of less than 20% 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 combined system of a Nafion dryer and a moisture preprocessor capable of cross-operating 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, (i-1) an inlet tube 102 into which the sample gas is introduced; (i-2) a preheater 103 disposed around the inlet tube 102; (i-3) a flow tube 120 vertically connected to the inlet tube 102; (i-4) a peltier block 105 for cooling the flow pipe 120; (i-5) a regeneration heater 107 interposed between the flow pipe 120 and the peltier block 105; (i-6) a connection pipe 115 connected to an end of the flow pipe 120 to deliver sample gas from which moisture has been removed; (i-7) a solenoid valve 110 that is vertically branched between the flow pipe 120 and the connection pipe 115 and opens and closes; (i-8) a water tank 112 accommodating liquid falling when the solenoid valve 110 is opened; and (i-9) a water pre-treatment device including a vacuum pump 111 connected to the water tank 112; and (ii) one end connected to the connection pipe 115 and the other end connected to the outlet tube 114. A combined system of a Nafion dryer and a moisture pretreatment device is provided, characterized in that it includes a Nafion dryer 117 for forming and having an inlet 116 and an outlet 118 for drying gas to remove moisture.

In addition, as another embodiment of the present invention, the inlet tube 202 into which the sample gas is introduced; A first pre-processing module 1 including the aforementioned moisture pre-processing device; A second pre-processing module (2) including the aforementioned moisture pre-processing device; A first valve 224 installed on the inlet tube 202 to selectively connect the inlet tube 202 to the first preprocessing module 1 or the second preprocessing module 2; A first branch pipe 220 connecting between the first valve 224 and the first flow pipe 230 of the first preprocessing module 1; a second branch pipe 320 connecting between the first valve 224 and the second flow pipe 330 of the second preprocessing module 2; a Nafion dryer 117, the other end of which forms an outlet tube 114, and has an inlet 116 and an outlet 118 for drying gas to remove moisture; A second valve 226 selectively connecting the first connection pipe 215 of the first pretreatment module 1 and the second connection pipe 315 of the second pretreatment module 2 to one end of the Nafion dryer 117 ); a water tank 112 to which the first solenoid valve 210 of the first preprocessing module 1 and the second solenoid valve 310 of the second preprocessing module 2 are commonly connected; And a vacuum pump 111 connected to the water tank 112; there is provided a combined system of a Nafion dryer and a water pretreatment device, characterized in that it comprises a.

In addition, a fastener 104 connecting the inlet tube 102 and the upper portion of the flow pipe 120 is further included, and the fastener 104 includes Teflon.

In addition, an outlet connector 108 connecting the lower portion of the flow pipe 120 and the connection pipe 115 may be further included, and the outlet connector 108 may include Teflon.

In addition, the dry gas may be zero air or nitrogen from which pollutants to be analyzed, such as VOC and NOx, are removed.

In addition, a connection pipe heater 119 is further provided around the connection pipe 115.

In addition, an outlet connector 108 connecting the lower part of the flow pipe 120 and the connection pipe 115 is further included, and the connector heater 119 extends to the circumference of the outlet connector 108.

In addition, a first connection pipe heater 219 is further provided around the first connection pipe 215, and a second connection pipe heater 319 is further provided around the second connection pipe 315.

In addition, the first outlet connector 208 connecting the lower part of the first flow pipe 230 and the first connection pipe 215; And a second outlet connector 308 connecting the lower portion of the second flow pipe 330 and the second connection pipe 315; further comprising, the first connector heater 219 of the first outlet connector 208 It extends to the circumference, and the second connector heater 319 extends to the circumference of the second outlet connector 308.

In addition, the sample gas includes hydrochloric acid gas and moisture, removes moisture through pretreatment, and measures the concentration of hydrochloric acid gas in the sample gas discharged through the outlet tube 114.

In addition, the temperature of the sample gas inside the flow pipe 120 and the first and second flow pipes 230 and 330 is in the range of -1 ° C to 0 ° C or the temperature of the flow pipe 120 and the first and second flow pipes 230 and 330 is in the range of -15 ° C to -10 ° C.

The object of the present invention described above is another category, and in the operating method of the above-described combined system of the Nafion dryer and the moisture pretreatment device, the first and second valves 224 and 226 are configured to communicate with the first pretreatment module 1 Opening step (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); opening the first and second valves 224 and 226 to communicate with the second preprocessing module 2 (S330); Executing the first pre-processing module 1 in a regeneration mode (S340); And the second pre-processing module 2 is executed in a normal operation mode (S350); it can also be achieved by the operating method of the combination system of the Nafion dryer and the moisture pre-treatment device, characterized in that it includes.

According to one embodiment of the present invention, the formation of aerosol in which hydrochloric acid gas and moisture are combined can be maximally suppressed, and thus, the concentration of hydrochloric acid gas can be accurately analyzed with a high recovery rate of hydrochloric acid gas.

And, even if the absolute humidity of the introduced sample gas is high, the sample gas having a relative humidity of less than 20% flows out of the outlet tube.

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 combined system of a Nafion dryer and a moisture pretreatment device according to a first embodiment of the present invention;
2 is a configuration diagram of a combined system of a Nafion dryer and a moisture pretreatment device according to a second embodiment of the present invention;
3 is a flow chart showing when the moisture preprocessing apparatuses of the first and second embodiments according to the present invention operate in a normal operation mode;
4 is a flow chart showing when the moisture preprocessing apparatuses of the first and second embodiments according to the present invention operate in a regeneration mode;
5 is a flow chart showing when the water preprocessor according to the second embodiment of the present invention operates while being switched between a normal operation mode and a regeneration mode;
6 is a graph showing the recovery rate of hydrochloric acid gas according to the conventional water removal method and the water removal method of the present invention;
7 is a graph showing the relative humidity in the outlet tube measured according to the conventional water removal method and the water removal method of 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.

Configuration of the first embodiment

1 is a block diagram of a combined system of a Nafion dryer and a moisture pretreatment device 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 pipe 120 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 lower end of the flow pipe 120 is connected to the outlet connector 108, and the outlet connector 108 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 120 . The regeneration heater 107 functions to melt frost or ice inside the flow pipe 120 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 120 to -15 ° C to -10 ° C.

The connection pipe heater 119 is connected to the lower part of the flow pipe 120 and functions to heat the sample gas cooled in the normal operation mode to a predetermined temperature (about 25° C.).

It is branched vertically between the lower end of the flow pipe 120 and the connection pipe 115, 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 to accommodate 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. For selective drainage of the water tank 112, a check valve 113 is further included.

One end of the connection pipe 115 is connected to the outlet connector 108, and the other end is connected to the Nafion dryer 117.

The connector heater 119 is an electric heater that surrounds the outside of the connector 115 and the outlet connector 108. The connecting pipe heater 119 sets the temperature of the sample gas flowing into the Nafion dryer 117 to 60 to 150°C. This is to prevent non-homogeneous reactions such as condensation or bonding from occurring inside the Nafion dryer 117.

The lower end of the Nafion dryer 117 is connected to the connection pipe 115, and the upper end constitutes the outlet tube 114. The outlet tube 114 transfers the sample gas from which moisture has been removed to an analysis device (eg, a non-dispersive infrared ray detector) so that the concentration of hydrochloric acid gas can be accurately measured.

A drying gas inlet 116 and a drying gas outlet 188 are formed on the side of the Nafion dryer 117 . The dry gas may be zero air or nitrogen from which pollutants to be analyzed, such as VOC and NOx, are removed.

The Nafion dryer (117) is a dryer that removes moisture contained in a sample, and Nafion is a registered trademark as a proton ion transfer membrane developed by Dupont. Nafion dryers have a self-regenerating function, so there is no need to replace drying chemicals like other systems.

The Nafion dryer 117 includes a polymer film having excellent selective permeability to water and protons. In addition, the Nafion dryer 117 is made of a porous material having a network structure in which water channels having a cylindrical shape at the nano level are densely packed. In addition, Nafion is composed of a polymer structure in which carbon and chlorine are continuously bonded. SO ₃ ^- ions are attached to the ends of carbon and chlorine bonds, and SO ₃ ^- ions are hydrophilic and attract water. The film formed with Nafion is formed by spreading a bundle of Nafion tubes, each of which contains thousands of hollow fibers in a tube made of Nafion material (a material that selectively transmits only positive ions), and rolling them while applying adhesive between each tube at both ends. made by the process The Nafion dryer 117 completely removes moisture or moisture included in the sample gas introduced through the connection pipe 115, and can discharge chlorine gas with a high recovery rate.

Configuration of the second embodiment

Hereinafter, the configuration of the second embodiment will be described in detail with reference to the accompanying drawings. 2 is a block diagram of a combined system of a Nafion dryer and a moisture pretreatment device according to a second embodiment of the present invention. For the same configuration as the first embodiment of the second embodiment, the description is replaced with the configuration of the first embodiment. As shown in FIG. 2, the water preprocessing device according to the first 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 201 is introduced into the inlet tube 202 , and the inlet tube 202 is connected to the first valve 224 . The first and second valves 224 and 226 may be 3-way valves operated by a controller (not shown).

One end of the first branch pipe 220 is connected to the first valve 224 and the other end is connected to the first flow pipe 230 of the first preprocessing module 1 . One end of the second branch pipe 320 is connected to the first valve 224 and the other end is connected to the second flow pipe 330 of the second preprocessing module 2 .

The first connection pipe 215 of the first preprocessing module 1 and the second connection pipe 315 of the second preprocessing module 2 are connected to the second valve 226, and the second valve 226 is The pion dryer 117 is connected.

The first lamination pipe 222 is connected to the first solenoid valve 210 of the first preprocessing module 1, and the second lamination pipe 322 is connected to the second solenoid valve 310 of the second preprocessing module 2. It is connected to, and the lower end is connected to the water tank 112.

The water tank 112 is installed downstream of the first and second laminated pipes 222 and 322 to accommodate 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. For selective drainage of the water tank 112, a check valve 113 is further included.

In the second embodiment of FIG. 2, 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.

In addition, only one Nafion dryer 117 is connected to the first and second preprocessing modules 1 and 2.

Operation of the first embodiment

Hereinafter, the operation of the first embodiment will be described in detail with reference to the accompanying drawings. 3 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. 3, the preheater 103, the connection pipe heater 119 under the flow pipe 120, 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 connector heater 119 heats the sample gas to 60 to 150°C. The Peltier block 105 is cooled so that the temperature of the sample gas inside the flow pipe 120 is in the range of -1 ° C to 0 ° C or the temperature of the flow pipe 120 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 generated and collected from the chimney, heated in the preheater 103, and then cooled in the flow pipe 120 so that moisture in the gaseous phase becomes frost or ice. is phase separated and removed. At this time, the sample gas 101 has a residence time of less than 0.1 second in the flow pipe 120, and the relative humidity of the sample gas from which moisture is removed is less than 70%, so that the Nafion dryer 117 passes through the connection pipe 115. ) is transmitted to In the Nafion dryer 117, a small amount of moisture or moisture contained in the sample gas 101 is removed, and the dry sample gas having a relative humidity of less than 20% is discharged through the outlet tube 114. Thereafter, the analysis device (eg, non-dispersive infrared ray meter) can accurately analyze the concentration of hydrochloric acid gas by analyzing the sample gas. Meanwhile, despite such a low relative humidity (about 20%), the recovery rate of hydrochloric acid gas can be maintained at 95% or more. This makes it possible to accurately measure the concentration of hydrochloric acid gas. The normal operation mode of the second embodiment shown in FIG. 2 operates the same as the normal operation mode of the first embodiment.

4 is a flowchart showing when the moisture preprocessing apparatuses of the first and second embodiments according to the present invention operate in a regeneration mode. As shown in FIG. 4 , first, the operations of the preheater 103, the connection pipe heater 119 under the flow pipe 230, and the Peltier block 105 are continuously maintained in an ON state (S210).

Then, the regeneration heater 107 is turned on (S220). Then, after the ice or frost inside the flow pipe 120 melts and turns into water, it flows down and gathers at the top of the solenoid valve 110.

Then, the vacuum pump 111 is turned on for 10 seconds (S230). This is to form a sufficient negative pressure.

Then, the solenoid valve 110 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 110 is closed (S260) and the regeneration heater 107 is turned off (S270).

Through this process, the cross section of the flow pipe 120 is restored. The regeneration operation mode of the second embodiment shown in Fig. 2 operates the same as the regeneration operation mode of the first embodiment.

Operation of the second embodiment

Hereinafter, the operation of the second embodiment will be described in detail with reference to the accompanying drawings. 5 is a flow chart showing the operation of the water preprocessor according to the second embodiment of the present invention while being switched between a normal operation mode and a regeneration mode. As shown in Figure 5,

The controller (not shown) opens the first and second valves 224 and 226 so that the inlet tube 202 communicates with the first preprocessing module 1 (S300).

Then, the first pre-processing module 1 is executed in normal operation mode (S310). The normal operation mode is the same as the normal operation mode of the first embodiment described above. Therefore, the sample gas is firstly dehydrated in the first preprocessing module 1 and secondarily dehydrated in the Nafion dryer 117, and then discharged to the outlet tube 114 at a very low relative humidity. .

Then, the second pre-processing module 2 is executed in the regeneration mode (S320). The playback mode is the same as the playback mode of the first embodiment described above. That is, ice or frost is melted in the second preprocessing module 2 and discharged to the water tank 112 through the second laminating pipe 322 . The normal operation mode step (S310) of the first pre-processing module 1 and the regeneration mode step (S320) of the second pre-processing module 2 may be executed sequentially or simultaneously.

Then, a controller (not shown) converts the mode. Specifically, the first and second valves 224 and 226 are opened so that the inlet tube 202 communicates with the second preprocessing module 2 (S330).

Then, the first preprocessing module 1 is executed in the regeneration mode (S340), and the second preprocessing module 2 is executed in the normal operation mode (S350). The regeneration mode step (S340) of the first pre-processing module 1 and the normal operation mode step (S350) of the second pre-processing module 2 may be executed sequentially or simultaneously.

By repeatedly switching modes in this way, the controller can remove moisture without interruption.

Experiment result

Hereinafter, experimental data according to the present invention will be compared with conventional experimental data. First, Figure 6 is a graph showing the recovery rate of hydrochloric acid gas according to the conventional water removal method and the water removal method of the present invention. 6 is a hydrochloric acid gas recovery rate when moisture is removed using only a conventional Peltier, and a hydrochloric acid gas recovery rate when moisture is removed using only a conventional Nafion dryer. Hydrochloric acid gas recoveries in the case of mixed use (hybrid) were compared. As shown in FIG. 6, when the Peltier and Nafion dryers are combined and used (hybrid), the hydrochloric acid gas recovery rate is 95% or more, and the relative humidity in the outlet tube is about 15%, which is the driest state (good result ) was shown. Therefore, it can be confirmed that the method of combining and using the Peltier and Nafion dryers as in the present invention exhibits excellent performance.

7 is a graph showing the relative humidity in the outlet tube measured according to the conventional water removal method and the water removal method of the present invention. 7 shows the relative humidity when moisture is removed using only a conventional Peltier, and the relative humidity when moisture is removed using only a conventional Nafion dryer. Hybrid) compared relative humidity. As shown in FIG. 7, when the Peltier and Nafion dryers are combined and used (hybrid), the relative humidity in the outlet tube is also about 15%, which is the driest state (good result). 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 connection,
110: solenoid valve, 111: vacuum pump,
112: water tank, 113: check valve,
114: outflow tube, 115: connection pipe,
116: dry gas inlet, 117: Nafion dryer,
118: dry gas outlet, 119: connector heater,
120: flow pipe, 201: sample gas,
202: inlet tube, 203: first preheater,
205: first peltier block, 206: first radiator,
207: first regeneration heater, 208: first outlet connection,
210: first solenoid valve, 215: first connector,
219: first connector heater, 220: first branch pipe,
222: first joint pipe, 224: first valve,
226: second valve, 230: first flow pipe,
303: second preheater, 305: second peltier block,
306: second radiator, 307: second regeneration heater,
308: second outlet connector, 310: second solenoid valve,
315: second connector, 319: second connector heater,
320: second branch pipe, 322: second joint pipe,
330: second flow pipe.

Claims (13)

(i-1) an inlet tube 102 through which sample gas is introduced;
(i-2) a preheater 103 disposed around the inlet tube 102;
(i-3) a flow tube 120 vertically connected to the inlet tube 102;
(i-4) a peltier block 105 for cooling the flow pipe 120;
(i-5) a regeneration heater 107 interposed between the flow pipe 120 and the peltier block 105;
(i-6) a connection pipe 115 connected to an end of the flow pipe 120 to deliver the sample gas from which moisture has been removed;
(i-7) a solenoid valve 110 that is vertically branched between the flow pipe 120 and the connection pipe 115 and opens and closes;
(i-8) a water tank 112 accommodating liquid falling when the solenoid valve 110 is opened;
(i-9) a water pretreatment device including a vacuum pump 111 connected to the water tank 112;
(ii) Nafion dryer 117 having one end connected to the connection pipe 115, the other end forming an outlet tube 114, and having an inlet 116 and an outlet 118 for drying gas to remove moisture. );
A fastener 104 connecting the inlet tube 102 and the upper portion of the flow tube 120;
An outlet connector 108 connecting the lower part of the flow pipe 120 and the connection pipe 115; and
A connection pipe heater 119 provided around the connection pipe 115,
The fastener 104 and the outlet connector 108 further include Teflon,
The drying gas is a combined system of a Nafion dryer and a moisture pretreatment device, characterized in that the air or nitrogen from which VOC and NOx are removed. an inlet tube 202 through which sample gas is introduced;
A first pre-processing module (1) comprising the moisture pre-processing device according to claim 1;
A second pre-processing module (2) comprising the moisture pre-processing device according to claim 1;
a first valve 224 installed on the inlet tube 202 to selectively connect the inlet tube 202 to the first preprocessing module 1 or the second preprocessing module 2;
a first branch pipe 220 connecting between the first valve 224 and the first flow pipe 230 of the first preprocessing module 1;
a second branch pipe 320 connecting between the first valve 224 and the second flow pipe 330 of the second preprocessing module 2;
a Nafion dryer 117, the other end of which forms an outlet tube 114, and has an inlet 116 and an outlet 118 for drying gas to remove moisture;
A second connection pipe 215 of the first preprocessing module 1 and a second connection pipe 315 of the second preprocessing module 2 are selectively connected to one end of the Nafion dryer 117. valve 226;
a water tank 112 to which the first solenoid valve 210 of the first preprocessing module 1 and the second solenoid valve 310 of the second preprocessing module 2 are commonly connected; and
Including; vacuum pump 111 connected to the water tank 112,
The dry gas is air or nitrogen from which VOC and NOx have been removed,
A first connection pipe heater 219 is further provided around the first connection pipe 215, and a second connection pipe heater 319 is further provided around the second connection pipe 315,
a first outlet connector 208 connecting the lower part of the first flow pipe 230 and the first connection pipe 215; And a second outlet connector 308 connecting the lower portion of the second flow pipe 330 and the second connection pipe 315; further comprising,
The first connector heater 219 extends to the circumference of the first outlet connector 208, the second connector heater 319 extends to the circumference of the second outlet connector 308, and the The temperature of the sample gas inside the first and second flow pipes 230 and 330 is in the range of -1 ° C to 0 ° C or the temperature of the first and second flow pipes 230 and 330 is in the range of -15 ° C to -10 ° C A combined system of a Nafion dryer and a moisture pretreatment device. delete delete delete delete (i-1) an inlet tube 102 through which sample gas is introduced;
(i-2) a preheater 103 disposed around the inlet tube 102;
(i-3) a flow tube 120 vertically connected to the inlet tube 102;
(i-4) a peltier block 105 for cooling the flow pipe 120;
(i-5) a regeneration heater 107 interposed between the flow pipe 120 and the peltier block 105;
(i-6) a connection pipe 115 connected to an end of the flow pipe 120 to deliver the sample gas from which moisture has been removed;
(i-7) a solenoid valve 110 that is vertically branched between the flow pipe 120 and the connection pipe 115 and opens and closes;
(i-8) a water tank 112 accommodating liquid falling when the solenoid valve 110 is opened;
(i-9) a water pretreatment device including a vacuum pump 111 connected to the water tank 112;
(ii) Nafion dryer 117 having one end connected to the connection pipe 115, the other end forming an outlet tube 114, and having an inlet 116 and an outlet 118 for drying gas to remove moisture. );
A fastener 104 connecting the inlet tube 102 and the upper portion of the flow tube 120;
An outlet connector 108 connecting the lower part of the flow pipe 120 and the connection pipe 115; and
A connection pipe heater 119 provided around the connection pipe 115,
The fastener 104 and the outlet connector 108 further include Teflon,
The dry gas is air or nitrogen from which VOC and NOx have been removed,
The coupling system of the Nafion dryer and the moisture pretreatment device, characterized in that the connection pipe heater 119 extends to the circumference of the outlet connector 108. delete delete According to claim 1 or 2,
The sample gas includes hydrochloric acid gas and water,
The moisture is removed through pretreatment,
A combined system of a Nafion dryer and a water pretreatment device, characterized in that for measuring the concentration of the hydrochloric acid gas in the sample gas discharged to the outlet tube (114). (i-1) an inlet tube 102 through which sample gas is introduced;
(i-2) a preheater 103 disposed around the inlet tube 102;
(i-3) a flow tube 120 vertically connected to the inlet tube 102;
(i-4) a peltier block 105 for cooling the flow pipe 120;
(i-5) a regeneration heater 107 interposed between the flow pipe 120 and the peltier block 105;
(i-6) a connection pipe 115 connected to an end of the flow pipe 120 to deliver the sample gas from which moisture has been removed;
(i-7) a solenoid valve 110 that is vertically branched between the flow pipe 120 and the connection pipe 115 and opens and closes;
(i-8) a water tank 112 accommodating liquid falling when the solenoid valve 110 is opened;
(i-9) a water pretreatment device including a vacuum pump 111 connected to the water tank 112;
(ii) Nafion dryer 117 having one end connected to the connection pipe 115, the other end forming an outlet tube 114, and having an inlet 116 and an outlet 118 for drying gas to remove moisture. );
A fastener 104 connecting the inlet tube 102 and the upper portion of the flow tube 120;
An outlet connector 108 connecting the lower part of the flow pipe 120 and the connection pipe 115; and
A connection pipe heater 119 provided around the connection pipe 115,
The fastener 104 and the outlet connector 108 further include Teflon,
The dry gas is air or nitrogen from which VOC and NOx have been removed,
The temperature of the sample gas inside the flow pipe 120 is in the range of -1 ° C to 0 ° C or the temperature of the flow pipe 120 is in the range of -15 ° C to -10 ° C. Nafion dryer and moisture pretreatment device, characterized in that Combination system of. delete In the operating method of the combined system of the Nafion dryer and the moisture pretreatment device according to claim 2,
opening the first and second valves 224 and 226 to communicate with the first preprocessing module 1 (S300);
The first pre-processing module 1 is executed in a normal operation mode (S310);
The step of executing the second pre-processing module 2 in a regeneration mode (S320);
opening the first and second valves 224 and 226 to communicate with the second preprocessing module 2 (S330);
Executing the first pre-processing module 1 in a regeneration mode (S340); and
The second preprocessing module 2 is executed in a normal operation mode (S350); operating method of a combination system of a Nafion dryer and a moisture pretreatment device, characterized in that it includes.

Images