Gas drying treatment system

Abstract

The invention relates to a gas drying treatment system, and belongs to the technical field of gas treatment.The gas drying treatment system comprises a gas inlet assembly which comprises a first gas inlet and a second gas inlet, and the first gas inlet and the second gas inlet are used for introducing sample gas to be treated; the drying treatment assembly comprises a first cold trap, a second cold trap and an eight-way rotor valve, the first air inlet is connected with an air inlet of the first cold trap, the second air inlet is connected with an air inlet of the second cold trap, and an air outlet of the first cold trap and an air outlet of the second cold trap are respectively connected with an air inlet of the eight-way rotor valve; a reversing port of the first three-way valve is connected with a first purging gas outlet, and a reversing port of the second three-way valve is connected with a second purging gas outlet; and the control assembly is configured to control opening and closing of the first stop valve, the second stop valve, the first three-way valve and the second three-way valve and working modes of the first cold trap and the second cold trap through a specific working time sequence. The gas treatment efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas processing, and in particular relates to a gas drying processing system. Background Art

[0002] With the increasing awareness of protecting the ecological environment, environmental governance usually uses gas analyzers to analyze gases and come up with targeted governance strategies; however, gas analyzers are very sensitive to the water vapor concentration in the sample gas, and the water vapor concentration will absorb infrared light, thereby affecting the accuracy of the gas analyzer results. Therefore, it is usually necessary to dry and remove water from the sample gas before sending it to the gas analyzer for analysis.

[0003] Existing gas drying and processing systems usually use condensers to condense and remove water from sample gas through refrigeration. However, due to the ultra-low temperature environment, the condensers are prone to ice and frost, and frequent heating and defrosting operations are required, resulting in technical problems such as low gas processing efficiency. Summary of the invention

[0004] In view of the above analysis, an embodiment of the present invention aims to provide a gas drying processing system to solve one or more of the above problems existing in the prior art.

[0005] The object of the present invention is achieved in that: A first aspect of the present invention provides a gas drying processing system, comprising: An air inlet assembly comprises a first air inlet and a second air inlet, wherein the first air inlet and the second air inlet are used to introduce a sample gas to be processed; A drying treatment component, comprising a first cold trap, a second cold trap and an eight-way rotor valve, wherein the first air inlet is connected to the air inlet of the first cold trap through a first stop valve, the second air inlet is connected to the air inlet of the second cold trap through a second stop valve, the air outlet of the first cold trap and the air outlet of the second cold trap are connected to the air inlet of the eight-way rotor valve through a first three-way valve and a second three-way valve respectively; the reversing port of the first three-way valve is connected to a first purge gas outlet, and the reversing port of the second three-way valve is connected to a second purge gas outlet; A control component is electrically connected to the drying processing component and is configured to control the opening and closing of the first stop valve, the second stop valve, the first three-way valve and the second three-way valve, as well as the working mode of the first cold trap and the second cold trap through a specific working sequence to remove water vapor in the sample gas.

[0006] Furthermore, a first bypass outlet is connected between the first air inlet and the first stop valve, and a second bypass outlet is connected between the second air inlet and the second stop valve. The first bypass outlet and the second bypass outlet are used to balance the pressure in the gas drying processing system.

[0007] Furthermore, the working sequence of the control component includes: performing cyclic control with a preset time length as a cycle, and evenly dividing the preset time length into a first sub-cycle and a second sub-cycle, so that the first cold trap and the second cold trap perform condensation and water removal alternately; The control logic of the first sub-period includes: in the first time period, the first stop valve, the first three-way valve and the second stop valve are opened, and the second three-way valve is closed, and the first cold trap and the second cold trap are in the cooling working mode; in the second time period, the first stop valve, the first three-way valve and the second stop valve are opened, and the second three-way valve is closed, and the first cold trap is in the cooling working mode, and the second cold trap is in the heating working mode; in the third time period, the first stop valve, the first three-way valve and the second stop valve are opened, and the second three-way valve is closed, and the first cold trap and the second cold trap are in the cooling working mode; in the fourth time period, the first stop valve and the first three-way valve are opened, and the second stop valve and the second three-way valve are closed, and the first cold trap and the second cold trap are in the cooling working mode; in the fifth time period, the first stop valve, the first three-way valve and the second stop valve are opened, and the second three-way valve is closed, and the first cold trap and the second cold trap are in the cooling working mode; in the sixth time period, the first stop valve and the first three-way valve are opened, and the second stop valve and the second three-way valve are closed, and the first cold trap and the second cold trap are in the cooling working mode.

[0008] Further, the control logic of the second sub-period includes: in the seventh time period, the first stop valve, the second stop valve and the second three-way valve are opened, the first three-way valve is closed, and the first cold trap and the second cold trap are in the cooling working mode; in the eighth time period, the first stop valve, the second stop valve and the second three-way valve are opened, the first three-way valve is closed, the first cold trap is in the heating working mode, and the second cold trap is in the cooling working mode; in the ninth time period, the first stop valve, the second stop valve and the second three-way valve are opened, the first three-way valve is closed, and the first cold trap and the second cold trap are in the cooling working mode; in the tenth time period, the second stop valve and the second three-way valve are opened, the first stop valve and the first three-way valve are closed, and the first cold trap and the second cold trap are in the cooling working mode; in the eleventh time period, the first stop valve, the second stop valve and the second three-way valve are opened, the first three-way valve is closed, and the first cold trap and the second cold trap are in the cooling working mode; in the twelfth time period, the second stop valve and the second three-way valve are opened, the first stop valve and the first three-way valve are closed, and the first cold trap and the second cold trap are in the cooling working mode.

[0009] Furthermore, the gas outlet of the eight-way rotor valve is connected to the gas inlet of the gas analyzer so as to input the dried gas into the gas analyzer.

[0010] Furthermore, the air inlet also includes a standard gas inlet, which is connected to the air inlet of the eight-way rotor valve and is used to introduce standard gas so that the gas analyzer can perform comparative analysis based on the sample gas and the standard gas.

[0011] Furthermore, a float flowmeter is provided at the first bypass outlet and the second bypass outlet for measuring the gas flow rate discharged from the gas drying treatment system through the first bypass outlet and the second bypass outlet.

[0012] Furthermore, a water removal filter tank is provided between the gas outlet of the eight-way rotor valve and the gas analyzer, and the water removal filter tank is used to further remove residual water vapor in the gas.

[0013] Furthermore, the material of the first cold trap and the second cold trap includes stainless steel, and the inner walls are provided with a silane coating layer.

[0014] Furthermore, a third bypass outlet is provided between the water removal filter tank and the gas analyzer for balancing the pressure of the gas entering the gas analyzer.

[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: The gas drying and processing system provided by the present invention controls the opening and closing of the first stop valve, the second stop valve, the first three-way valve, and the second three-way valve, as well as the working modes of the first cold trap and the second cold trap through a control component, so that the first cold trap and the second cold trap perform condensation and water removal work alternately, thereby improving the gas processing efficiency, and balancing the pressure of the gas drying and processing system by setting a purge gas outlet, thereby ensuring the gas pressure entering the gas analyzer, thereby improving the accuracy of the analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the structure of the gas drying processing system provided in Example 1 of the present invention.

[0018] Reference numerals: 1-air inlet assembly; 11-first air inlet; 110-first bypass outlet; 110a-float flowmeter; 12-second air inlet; 120-second bypass outlet; 13-standard gas inlet; 130-third bypass outlet; 2-drying treatment assembly; 21-first cold trap; 210-first stop valve; 211-first three-way valve; 212-first purge gas outlet; 22-second cold trap; 220-second stop valve; 221-second three-way valve; 222-second purge gas outlet; 23-eight-way rotor valve; 230-water removal filter tank; 231-mass flow controller; 3-control assembly; 4-gas analyzer. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments disclosed in this disclosure can be combined, separated, interchanged and / or rearranged with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Example 1 A specific embodiment of the present invention, as Figure 1 As shown, a gas drying processing system is disclosed, comprising: The gas inlet assembly 1 comprises a first gas inlet 11 and a second gas inlet 12, wherein the first gas inlet 11 and the second gas inlet 12 are used to introduce a sample gas to be processed; The drying treatment component 2 includes a first cold trap 21, a second cold trap 22 and an eight-way rotor valve 23, wherein the first air inlet 11 is connected to the air inlet of the first cold trap 21 through a first stop valve 210, the second air inlet 12 is connected to the air inlet of the second cold trap 22 through a second stop valve 220, and the air outlet of the first cold trap 21 and the air outlet of the second cold trap 22 are connected to the air inlet of the eight-way rotor valve 23 through a first three-way valve 211 and a second three-way valve 221, respectively; the reversing port of the first three-way valve 211 is connected to a first purge gas outlet 212, and the reversing port of the second three-way valve 221 is connected to a second purge gas outlet 222; The control component 3 is electrically connected to the drying processing component 2, and is configured to control the opening and closing of the first stop valve 210, the second stop valve 220, the first three-way valve 211 and the second three-way valve 221, and the working mode of the first cold trap 21 and the second cold trap 22 through a specific working sequence to remove water vapor in the sample gas.

[0021] Compared with the prior art, the gas drying treatment system provided in this embodiment controls the opening and closing of the first stop valve, the second stop valve, the first three-way valve, and the second three-way valve, as well as the working modes of the first cold trap and the second cold trap through a control component, so that the first cold trap and the second cold trap perform condensation and water removal work alternately, thereby improving the gas processing efficiency, and balancing the pressure of the gas drying treatment system by setting a purge gas outlet, thereby ensuring the gas pressure entering the gas analyzer, thereby improving the accuracy of the analysis results.

[0022] Exemplarily, the first cold trap 21 and the second cold trap 22 are both fluid pipes with a length of 800 mm, an outer diameter of 1 / 8 inch, and a volume of 3 ml, which can achieve rapid cooling or heating, and the outside of the cold trap is coated with a heating layer formed by winding an electric heating wire and is equipped with a compressor that can cool to -70°C.

[0023] In this embodiment, a first bypass outlet 110 is connected between the first air inlet 11 and the first stop valve 210, and a second bypass outlet 120 is connected between the second air inlet 12 and the second stop valve 220. The first bypass outlet 110 and the second bypass outlet 120 are used to balance the pressure in the gas drying processing system.

[0024] Specifically, by setting up two bypasses connected to the external atmospheric pressure, the sample gas can enter the gas analyzer at a state close to normal pressure, thereby reducing the error of the analysis result caused by pressure changes.

[0025] In this embodiment, the working sequence of the control component 3 includes: performing cyclic control with a preset time length as a period, and evenly dividing the preset time length into a first sub-period and a second sub-period, so that the first cold trap 21 and the second cold trap 22 alternately perform condensation and dehydration; Exemplarily, the preset duration is set to 10 minutes as the cycle period, then the first sub-period is 0-5 minutes, the second sub-period is 5-10 minutes, and the first sub-period is divided into multiple time periods, the first cold trap 21 is controlled to perform condensation and dehydration, and the second cold trap performs pressure balance, defrosting, purge gas, dehydration preparation and other tasks, and the second sub-period is divided into multiple time periods, the second cold trap is controlled to perform condensation and dehydration, and the first cold trap performs pressure balance, defrosting, purge gas, dehydration preparation and other tasks. In this way, by controlling the two cold traps to alternately condense and dehydrate, there is no need to perform a series of defrosting, pipe cleaning and other tasks after running for a period of time, which improves processing efficiency and reduces resource consumption.

[0026] In this embodiment, the control logic of the first sub-period includes: In the first period, the first stop valve 210, the first three-way valve 211 and the second stop valve 220 are opened, and the second three-way valve 221 is closed, and the first cold trap 21 and the second cold trap 22 are in a refrigeration working mode; Exemplarily, the first time period is set to 0-0.2min, during which a portion of the sample gas entering from the second air inlet 12 is discharged from the gas drying treatment system through the second bypass outlet 120 to balance the pressure in the gas drying treatment system, and the remaining sample gas is first condensed and dehydrated by the second cold trap 22 and then discharged from the gas drying treatment system through the second purge gas outlet 222 through the reversing port of the second three-way valve 221 to balance the pressure in the gas drying treatment system and maintain the cleanliness of the pipeline where the second cold trap is located.

[0027] In the second period, the first stop valve 210, the first three-way valve 211 and the second stop valve 220 are opened, and the second three-way valve 221 is closed, so that the first cold trap 21 is in the cooling working mode and the second cold trap 22 is in the heating working mode; Exemplarily, the second time period is set to 0.2-2.3 minutes. During this time period, a portion of the sample gas entering from the second air inlet 12 is discharged from the gas drying treatment system through the second bypass outlet 120 to balance the pressure in the gas drying treatment system, and the remaining sample gas is discharged from the gas drying treatment system from the second purge gas outlet 222 through the reversing port of the second three-way valve 221 to balance the pressure in the gas drying treatment system and maintain the cleanliness of the pipeline where the second cold trap is located. The second cold trap 22 is heated to remove frost formed by condensation in the first time period.

[0028] In the third period, the first stop valve 210, the first three-way valve 211 and the second stop valve 220 are opened, and the second three-way valve 221 is closed, and the first cold trap 21 and the second cold trap 22 are in the refrigeration working mode; Exemplarily, the third time period is set to 2.3-2.8 minutes. During this period, a portion of the sample gas entering from the second air inlet 12 is discharged from the gas drying treatment system through the second bypass outlet 120 to balance the pressure in the gas drying treatment system, and the remaining sample gas is discharged from the gas drying treatment system through the reversing port of the second three-way valve 221 and the second purge gas outlet 222 to balance the pressure in the gas drying treatment system and maintain the cleanliness of the pipeline where the second cold trap is located. The second cold trap 22 starts to refrigerate in preparation for condensation and dehydration.

[0029] In the fourth period, the first stop valve 210 and the first three-way valve 211 are opened, the second stop valve 220 and the second three-way valve 221 are closed, and the first cold trap 21 and the second cold trap 22 are in the refrigeration working mode; Exemplarily, the fourth time period is set to 2.8-4.75 minutes. During this period, all the sample gas entering from the second air inlet 12 is discharged from the gas drying treatment system through the second bypass outlet 120 to balance the pressure in the gas drying treatment system. The second cold trap 22 continues to refrigerate to prepare for condensation and dehydration while preventing the cold trap from freezing prematurely.

[0030] In the fifth period, the first stop valve 210, the first three-way valve 211 and the second stop valve 220 are opened, and the second three-way valve 221 is closed, and the first cold trap 21 and the second cold trap 22 are in the refrigeration working mode; Exemplarily, the fifth time period is set to 4.75-4.8 minutes. During this time period, a portion of the sample gas entering from the second air inlet 12 is discharged from the gas drying treatment system through the second bypass outlet 120 to balance the pressure in the gas drying treatment system, and the remaining sample gas is first condensed and dehydrated by the second cold trap 22, and then discharged from the gas drying treatment system through the second purge gas outlet 222 through the reversing port of the second three-way valve to replace the air in the second cold trap 22.

[0031] In the sixth period, the first stop valve 210 and the first three-way valve 211 are opened, the second stop valve 220 and the second three-way valve 221 are closed, and the first cold trap 21 and the second cold trap 22 are in the refrigeration working mode.

[0032] Exemplarily, the sixth time period is set to 4.8-5 minutes. During this period, all the sample gas entering from the second air inlet 12 is discharged from the gas drying treatment system through the second bypass outlet 120 to balance the pressure in the gas drying treatment system. After the second cold trap 22 has been cooled during this period, it is sufficient to perform condensation and water removal.

[0033] It should be noted that, during the entire first sub-cycle, a portion of the sample gas entering through the first air inlet 11 is discharged from the gas drying treatment system through the first bypass outlet 110 to balance the pressure in the gas drying treatment system, and the remaining sample gas is first condensed and dehydrated in the first cold trap 21, and then enters the eight-way rotor valve 23 for the next step of analysis.

[0034] In this embodiment, the control logic of the second sub-period includes: In the seventh period, the first stop valve 210, the second stop valve 220 and the second three-way valve 221 are opened, the first three-way valve 211 is closed, and the first cold trap 21 and the second cold trap 22 are in the refrigeration working mode; In the eighth period, the first stop valve 210, the second stop valve 220 and the second three-way valve 221 are opened, and the first three-way valve 211 is closed, the first cold trap 21 is in the heating working mode, and the second cold trap 22 is in the cooling working mode; In the ninth period, the first stop valve 210, the second stop valve 220 and the second three-way valve 221 are opened, the first three-way valve 211 is closed, and the first cold trap 21 and the second cold trap 22 are in the refrigeration working mode; In the tenth period, the second stop valve 220 and the second three-way valve 221 are opened, the first stop valve 210 and the first three-way valve 211 are closed, and the first cold trap 21 and the second cold trap 22 are in the refrigeration working mode; In the eleventh period, the first stop valve 210, the second stop valve 220 and the second three-way valve 221 are opened, and the first three-way valve 211 is closed, and the first cold trap 21 and the second cold trap 22 are in the refrigeration working mode; In the twelfth period, the second stop valve 220 and the second three-way valve 221 are opened, and the first stop valve 210 and the first three-way valve 211 are closed, and the first cold trap 21 and the second cold trap 22 are in the cooling working mode.

[0035] Specifically, after the first sub-cycle 0-5min is completed, the second sub-cycle 5-10min is entered. In the second sub-cycle, the seventh time period is set to 5-5.2min, the eighth time period is set to 5.2-7.3min, the ninth time period is set to 7.3-7.8min, the tenth time period is set to 7.8-9.75min, the eleventh time period is set to 9.75-9.8min, and the twelfth time period is set to 9.8-10min. The control logic of each time period is opposite to that of the first sub-cycle, and will not be repeated here. The two sub-cycles cooperate with each other so that the first cold trap and the second cold trap alternately perform condensation and water removal work.

[0036] In this embodiment, the gas outlet of the eight-way rotor valve 23 is connected to the gas inlet of the gas analyzer 4 so as to input the dried gas into the gas analyzer 4 .

[0037] Specifically, the sample gas after the water removal treatment is alternately condensed by the first cold trap 21 and the second cold trap 22 to meet the input requirements of the gas analyzer, and is alternately input into the gas analyzer 4 through the eight-way rotor valve 23 for analysis.

[0038] In some embodiments, the air inlet further includes a standard gas inlet 13, which is connected to the air inlet of the eight-way rotor valve 23 for introducing standard gas so that the gas analyzer 4 can perform comparative analysis based on the sample gas and the standard gas.

[0039] Specifically, at least three air inlets of the eight-way rotor valve 23 are connected to the first air inlet 11 through the first stop valve 210 and the first three-way valve 211, are connected to the second air inlet 12 through the second stop valve 220 and the second three-way valve 221, and are directly connected to the standard gas inlet 13. In addition to these air inlets, other gas inlets can be added according to actual needs.

[0040] In this embodiment, a float flowmeter 110 a is provided at the first bypass outlet 110 and the second bypass outlet 120 for measuring the gas flow rate discharged from the gas drying processing system through the first bypass outlet 110 and the second bypass outlet 120 .

[0041] In some embodiments, a water removal filter tank 230 is further provided between the gas outlet of the eight-way rotor valve 23 and the gas analyzer 4 , and the water removal filter tank 230 is used to further remove residual water vapor in the gas.

[0042] Specifically, the dewatering filter tank 230 is filled with an adsorbent of anhydrous magnesium perchlorate, which can effectively remove the trace water vapor remaining in the gas after condensation and dehydration by the first cold trap 21 and the second cold trap 22, thereby ensuring the accuracy of the analysis result of the gas analyzer 4.

[0043] In this embodiment, the material of the first cold trap 21 and the second cold trap 22 includes stainless steel, and the inner walls are provided with a silane coating layer.

[0044] Specifically, stainless steel pipes can be used as power cords for the electric heating layer. The inner wall is provided with a silane coating layer, which can prevent the fluid pipeline from being affected by the adsorption of adsorptive gases such as formaldehyde and ammonia, thereby ensuring the reliability of the analysis data results.

[0045] In this embodiment, a third bypass outlet 130 is further provided between the water removal filter tank 230 and the gas analyzer 4 to balance the pressure of the gas entering the gas analyzer 4 .

[0046] Specifically, by providing the third bypass outlet 130, it is possible to further ensure that the sample gas processed by the gas drying system enters the gas analyzer at a state close to normal pressure, thereby further ensuring the accuracy of the analysis results of the gas analyzer. In some embodiments, a mass flow controller 231 is further disposed after the water removal filter tank 230 to control the gas output by the drying treatment system to always remain within a stable and controllable flow range.

Claims

1. A gas drying processing system, characterized in that: include: An air inlet assembly (1) comprises a first air inlet (11) and a second air inlet (12), wherein the first air inlet (11) and the second air inlet (12) are used to introduce a sample gas to be processed; A drying treatment component (2), comprising a first cold trap (21), a second cold trap (22) and an eight-way rotor valve (23), wherein the first air inlet (11) is connected to the air inlet of the first cold trap (21) via a first stop valve (210), the second air inlet (12) is connected to the air inlet of the second cold trap (22) via a second stop valve (220), the air outlet of the first cold trap (21) and the air outlet of the second cold trap (22) are connected to the air inlet of the eight-way rotor valve (23) via a first three-way valve (211) and a second three-way valve (221), respectively; the reversing port of the first three-way valve (211) is connected to a first purge gas outlet (212), and the reversing port of the second three-way valve (221) is connected to a second purge gas outlet (222); A control component (3) is electrically connected to the drying processing component (2) and is configured to control the opening and closing of the first stop valve (210), the second stop valve (220), the first three-way valve (211) and the second three-way valve (221), as well as the working mode of the first cold trap (21) and the second cold trap (22) through a specific working sequence to remove water vapor in the sample gas.

2. The gas drying processing system according to claim 1, characterized in that: A first bypass outlet (110) is also connected between the first air inlet (11) and the first stop valve (210), and a second bypass outlet (120) is also connected between the second air inlet (12) and the second stop valve (220). The first bypass outlet (110) and the second bypass outlet (120) are used to balance the pressure in the gas drying process system.

3. The gas drying processing system according to claim 2, characterized in that: The working sequence of the control component (3) includes: Performing cyclic control with a preset time length as a cycle, and evenly dividing the preset time length into a first sub-cycle and a second sub-cycle, so that the first cold trap (21) and the second cold trap (22) perform condensation and water removal alternately; The control logic of the first sub-period includes: In the first period, the first stop valve (210), the first three-way valve (211) and the second stop valve (220) are opened, and the second three-way valve (221) is closed, so that the first cold trap (21) and the second cold trap (22) are in a refrigeration working mode; In the second period, the first stop valve (210), the first three-way valve (211) and the second stop valve (220) are opened, and the second three-way valve (221) is closed, so that the first cold trap (21) is in a cooling working mode and the second cold trap (22) is in a heating working mode; In the third period, the first stop valve (210), the first three-way valve (211) and the second stop valve (220) are opened, and the second three-way valve (221) is closed, so that the first cold trap (21) and the second cold trap (22) are in a refrigeration working mode; In the fourth period, the first stop valve (210) and the first three-way valve (211) are opened, and the second stop valve (220) and the second three-way valve (221) are closed, so that the first cold trap (21) and the second cold trap (22) are in a refrigeration working mode; In the fifth period, the first stop valve (210), the first three-way valve (211) and the second stop valve (220) are opened, and the second three-way valve (221) is closed, so that the first cold trap (21) and the second cold trap (22) are in a refrigeration working mode; In the sixth period, the first stop valve (210) and the first three-way valve (211) are opened, and the second stop valve (220) and the second three-way valve (221) are closed, and the first cold trap (21) and the second cold trap (22) are in a refrigeration working mode.

4. The gas drying processing system according to claim 3, characterized in that: The control logic of the second sub-period includes: In the seventh period, the first stop valve (210), the second stop valve (220) and the second three-way valve (221) are opened, and the first three-way valve (211) is closed, so that the first cold trap (21) and the second cold trap (22) are in a refrigeration working mode; In the eighth period, the first stop valve (210), the second stop valve (220) and the second three-way valve (221) are opened, and the first three-way valve (211) is closed, so that the first cold trap (21) is in a heating working mode and the second cold trap (22) is in a cooling working mode; In the ninth period, the first stop valve (210), the second stop valve (220) and the second three-way valve (221) are opened, the first three-way valve (211) is closed, and the first cold trap (21) and the second cold trap (22) are in a refrigeration working mode; In the tenth period, the second stop valve (220) and the second three-way valve (221) are opened, and the first stop valve (210) and the first three-way valve (211) are closed, so that the first cold trap (21) and the second cold trap (22) are in a refrigeration working mode; In the eleventh period, the first stop valve (210), the second stop valve (220) and the second three-way valve (221) are opened, and the first three-way valve (211) is closed, so that the first cold trap (21) and the second cold trap (22) are in a refrigeration working mode; In the twelfth period, the second stop valve (220) and the second three-way valve (221) are opened, and the first stop valve (210) and the first three-way valve (211) are closed, and the first cold trap (21) and the second cold trap (22) are in a refrigeration working mode.

5. The gas drying processing system according to claim 1, characterized in that: The gas outlet of the eight-way rotor valve (23) is connected to the gas inlet of the gas analyzer (4) so ​​as to input the dried gas into the gas analyzer (4).

6. The gas drying processing system according to claim 2, characterized in that: The gas inlet further comprises a standard gas inlet (13), which is connected to the gas inlet of the eight-way rotor valve (23) and is used to introduce standard gas so that the gas analyzer (4) can perform comparative analysis based on the sample gas and the standard gas.

7. The gas drying processing system according to claim 6, characterized in that: The first bypass outlet (110) and the second bypass outlet (120) are provided with a float flow meter (110a) for measuring the gas flow rate discharged from the gas drying treatment system through the first bypass outlet (110) and the second bypass outlet (120).

8. The gas drying processing system according to claim 7, characterized in that: A water removal filter tank (230) is also provided between the gas outlet of the eight-way rotor valve (23) and the gas analyzer (4), and the water removal filter tank (230) is used to further remove residual water vapor in the gas.

9. The gas drying processing system according to claim 1, characterized in that: The material of the first cold trap (21) and the second cold trap (22) includes stainless steel, and the inner walls are provided with a silane coating layer.

10. The gas drying processing system according to claim 8, characterized in that: A third bypass outlet (130) is also provided between the water removal filter tank (230) and the gas analyzer (4) for balancing the pressure of the gas entering the gas analyzer (4).

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