Test system for gas separation and purification

Abstract

The application provides a test system for gas separation and purification, which comprises a separation and purification device capable of separating mixed gas of hydrogen and nitrogen; and a gas supply assembly comprising a first gas supply unit, a second gas supply unit and a gas mixer, wherein the first gas supply unit and the second gas supply unit are respectively communicated with the gas mixer, the gas mixer is communicated with the separation and purification device, the first gas supply unit is used for providing mixed gas of hydrogen and nitrogen and controlling the flow rate of the gas entering the gas mixer, the second gas supply unit is used for providing hydrogen or nitrogen and controlling the flow rate of the gas entering the gas mixer, and the gas mixer is used for mixing the gases entering from the first gas supply unit and the second gas supply unit and entering the separation and purification device. The technical scheme provided by the application can solve the problem of complicated verification process of the electrochemical separation and purification device in the prior art.

Description

Technical Field

[0001] This invention relates to the field of hydrogen purification technology, and more specifically, to a testing system for gas separation and purification. Background Technology

[0002] Currently, hydrogen has a wide range of applications, but due to different usage conditions and requirements, the purity and impurity types and contents of hydrogen vary depending on the specific conditions.

[0003] Electrochemical separation and purification devices can both separate and purify hydrogen and output at high pressure, so research on them mainly focuses on two directions: hydrogen separation and purification, and hydrogen compression. Researchers have successfully separated hydrogen from various hydrogen-containing gas mixtures, including ethylene, methane, and nitrogen, using electrochemical hydrogen pumps. Currently, in the process of developing key components and verifying key materials for electrochemical separation and purification devices, multiple verification experiments are usually conducted to test the performance of the hydrogen-nitrogen electrochemical separation and purification device, evaluating its separation performance under different hydrogen-nitrogen component ratios and pressures. However, this leads to long experimental cycles and significant energy waste. Summary of the Invention

[0004] This invention provides a testing system for gas separation and purification to solve the problem that the verification process for electrochemical separation and purification in the prior art is relatively cumbersome.

[0005] This invention provides a gas separation and purification testing system, comprising: a separation and purification unit capable of separating a mixture of hydrogen and nitrogen; and a gas supply assembly including a first gas supply unit, a second gas supply unit, and a gas mixer. The first and second gas supply units are respectively connected to the gas mixer, which is connected to the separation and purification unit. The first gas supply unit provides a mixture of hydrogen and nitrogen and controls the flow rate into the gas mixer. The second gas supply unit provides either hydrogen or nitrogen and controls the flow rate into the gas mixer. The gas mixer mixes the gases supplied by the first and second gas supply units and supplies them to the separation and purification unit.

[0006] Furthermore, the first gas supply unit includes a first gas storage tank and a first flow regulator. The first gas storage tank is connected to a gas mixer, and the first flow regulator is used to regulate the flow rate of the gas supplied by the first gas supply unit into the gas mixer. The second gas supply unit includes a second gas storage tank and a second flow regulator. The second gas storage tank is connected to a gas mixer, and the second flow regulator is used to regulate the flow rate of the gas supplied by the second gas supply unit into the gas mixer.

[0007] Furthermore, the gas separation and purification test system also includes a third flow regulator, which is located between the gas mixer and the separation and purification unit. The third flow regulator is used to regulate the flow rate of the gas introduced from the gas mixer into the separation and purification unit.

[0008] Furthermore, the separation and purification unit has an anode plate and a cathode plate, and the gas mixer is connected to the anode plate. The second gas supply unit also includes a first three-way valve, which has a first channel, a second channel and a third channel. The first channel is connected to the second gas storage tank, the second channel is connected to the gas mixer, and the third channel is connected to the cathode plate.

[0009] Furthermore, the gas separation and purification test system also includes a humidification component, which is located between the gas supply component and the separation and purification unit. The humidification component is used to adjust the humidity of the gas introduced into the separation and purification unit.

[0010] Furthermore, the humidification component includes: a humidifier; a second three-way valve having a fourth, fifth, and sixth channel, the fourth channel being connected to the humidifier and the fifth channel being connected to the separation and purification unit; and a diverting valve connected to the gas supply component, the humidifier, and the sixth channel, respectively. The diverting valve can adjust the flow direction of the gas to be tested. When the gas to be tested needs to be humidified, it enters the humidifier through the diverting valve and then enters the separation and purification unit through the fourth and fifth channels. When the gas to be tested does not need to be humidified, it enters the sixth channel through the diverting valve and then enters the separation and purification unit through the fifth channel.

[0011] Furthermore, the gas separation and purification test system also includes a heating component that can heat the separation and purification unit.

[0012] Furthermore, the gas separation and purification test system also includes an exhaust treatment component, which is connected to the exhaust port of the separation and purification unit.

[0013] Furthermore, the exhaust treatment assembly includes a gas-liquid separator and a heat exchanger connected in sequence. The gas-liquid separator has a fluid inlet and a gas outlet. The fluid inlet is connected to the exhaust port of the separation and purification unit, and the gas outlet is connected to the heat exchange channel of the heat exchanger.

[0014] Furthermore, the gas separation and purification test system also includes a back pressure assembly, which includes a pressure transmitter and a back pressure valve. The pressure transmitter and the back pressure valve are installed on the pipeline connecting the separation and purification unit and the exhaust treatment assembly. The pressure transmitter and the back pressure valve are used to control the exhaust pressure of the separation and purification unit.

[0015] According to the technical solution of the present invention, the first gas supply unit and the second gas supply unit can adjust the flow rate of the gas introduced into the gas mixer, thereby realizing real-time adjustment of the composition ratio of hydrogen and nitrogen introduced into the separation and purification unit when electrochemically separating hydrogen and nitrogen with different component ratios. This facilitates the testing of the separation and purification unit's separation and purification capacity under different gas component ratios. Compared with the prior art, which readjusts the gas component ratio introduced into the separation and purification unit after one separation, the testing system provided by the present invention can realize real-time adjustment of the gas component ratio introduced into the separation and purification unit, improving testing efficiency, eliminating the need to shut down the testing system, and reducing energy waste. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of a gas separation and purification test system provided according to an embodiment of the present invention is shown.

[0018] The above figures include the following reference numerals:

[0019] 100. Separation and purification device; 110. Anode plate; 120. Cathode plate;

[0020] 200. Gas supply components;

[0021] 210. First gas supply unit; 211. First gas storage tank; 212. First flow regulator; 213. First pressure reducing valve; 214. First check valve;

[0022] 220. Second gas supply unit; 221. Second gas storage tank; 222. Second flow regulator; 223. First three-way valve; 2231. First channel; 2232. Second channel; 2233. Third channel; 224. Second pressure reducing valve; 225. Explosion-proof solenoid valve; 226. Second check valve;

[0023] 230. Gas mixer; 231. Third flow regulator;

[0024] 300. Humidification assembly; 310. Humidifier; 320. Second three-way valve; 321. Fourth channel; 322. Fifth channel; 323. Sixth channel; 330. Diverting valve;

[0025] 400. Back pressure assembly; 410. Pressure transmitter; 420. Back pressure valve;

[0026] 500. Exhaust treatment assembly; 510. Gas-liquid separator; 520. Heat exchanger; 530. Fourth flow regulator; 540. Third tee; 541. Seventh channel; 542. Eighth channel; 543. Ninth channel;

[0027] 600. Heating component; 610. Water pump; 620. Constant temperature water tank. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figure 1 As shown, a gas separation and purification test system is provided according to an embodiment of the present invention. The gas separation and purification test system includes a separation and purification unit 100 and a gas supply assembly 200. The separation and purification unit 100 is capable of separating a mixture of hydrogen and nitrogen. The gas supply assembly 200 includes a first gas supply unit 210, a second gas supply unit 220, and a gas mixer 230. The first gas supply unit 210 and the second gas supply unit 220 are respectively connected to the gas mixer 230, which is connected to the separation and purification unit 100. The first gas supply unit 210 provides a mixture of hydrogen and nitrogen and controls the flow rate into the gas mixer 230. The second gas supply unit 220 provides either hydrogen or nitrogen and controls the flow rate into the gas mixer 230. The gas mixer 230 mixes the gases supplied by the first gas supply unit 210 and the second gas supply unit 220 and supplies them to the separation and purification unit 100.

[0030] According to the technical solution of the present invention, the first gas supply unit 210 and the second gas supply unit 220 can adjust the flow rate of the gas introduced into the gas mixer 230, thereby realizing the real-time adjustment of the composition ratio of hydrogen and nitrogen introduced into the separation and purification unit 100 when electrochemically separating hydrogen and nitrogen with different component ratios, so as to facilitate the testing of the separation and purification capacity of the separation and purification unit 100 under different gas component ratios. Compared with the prior art, which readjusts the gas component ratio introduced into the separation and purification unit 100 after one separation, the testing system provided by the present invention can realize the real-time adjustment of the gas component ratio introduced into the separation and purification unit 100, improving the testing efficiency, eliminating the need to shut down the testing system, and reducing energy waste.

[0031] Specifically, in this application, the first gas supply unit 210 can provide a mixture of hydrogen and nitrogen as a test sample. The component ratio of the hydrogen and nitrogen mixture provided by the first gas supply unit 210 is set to a predetermined value to be measured. The second gas supply unit 220 can provide either hydrogen or nitrogen. When it is necessary to increase the proportion of hydrogen in the gas to be measured, the second gas supply unit 220 can be set to provide hydrogen; when it is necessary to increase the proportion of nitrogen in the gas to be measured, the second gas supply unit 220 can be set to provide nitrogen. In this way, the gas component ratio in the separator 100 can be adjusted in real time to meet experimental requirements.

[0032] Furthermore, the first gas supply unit 210 includes a first gas storage tank 211 and a first flow regulator 212. The first gas storage tank 211 is connected to the gas mixer 230, and the first flow regulator 212 is used to regulate the flow rate of the gas supplied from the first gas supply unit 210 into the gas mixer 230. The second gas supply unit 220 includes a second gas storage tank 221 and a second flow regulator 222. The second gas storage tank 221 is connected to the gas mixer 230, and the second flow regulator 222 is used to regulate the flow rate of the gas supplied from the second gas supply unit 220 into the gas mixer 230. The first gas storage tank 211 stores a mixture of hydrogen and nitrogen, and the second gas storage tank 221 stores either hydrogen or nitrogen. With the above settings, the first flow regulator 212 can independently adjust the gas flow rate of the first gas supply unit 210, and the second flow regulator 222 can independently adjust the gas flow rate of the second gas supply unit 220, so as to meet the requirements of different component ratios of different gases introduced into the gas mixer 230 under different experimental needs.

[0033] Specifically, in this application, the gas mixer 230 is a static gas mixer. The static gas mixer realizes radial circulation mixing of hydrogen and nitrogen, improves the mixing effect of hydrogen and nitrogen, reduces the possibility of stratification of the mixed gas of hydrogen and nitrogen due to turbulence, ensures the uniformity and stability of the gas to be separated in the separation and purification unit 100, and reduces the interference factors on the experimental structure.

[0034] Furthermore, the gas separation and purification test system also includes a third flow regulator 231. The third flow regulator 231 is positioned between the gas mixer 230 and the separation and purification unit 100. The third flow regulator 231 is used to regulate the flow rate of the gas introduced from the gas mixer 230 into the separation and purification unit 100. Through this configuration, the third flow regulator 231 can regulate the flow rate and velocity of the gas input from the gas mixer 230 into the separation and purification unit 100, ensuring that the mixed hydrogen and nitrogen gases can be stably input into the separation and purification unit 100 under experimental conditions, thus meeting the usage requirements of the separation and purification unit 100.

[0035] Specifically, a first pressure reducing valve 213 is provided between the first gas storage tank 211 and the first flow regulator 212, and a second pressure reducing valve 224 is provided between the second gas storage tank 221 and the second flow regulator 222. By providing the first pressure reducing valve 213 and the second pressure reducing valve 224, the gas pressure of the gas output from the first gas storage tank 211 and the second gas storage tank 221 can be kept stable, reducing the possibility of uneven mixing of the gas input into the gas mixer 230 due to unstable gas pressure, and ensuring the stability of the reaction in the separation and purification unit 100.

[0036] Furthermore, a first check valve 214 is provided between the first gas storage tank 211 and the first flow regulator 212, and a second check valve 226 is provided between the second gas storage tank 221 and the second flow regulator 222. By providing the first check valve 214 and the second check valve 226, gas backflow into the first gas storage tank 211 and the second gas storage tank 221 can be prevented, thus ensuring the stable operation of the gas supply assembly 200.

[0037] In a specific embodiment of this application, the separation and purification device 100 has an anode plate 110 and a cathode plate 120, a gas mixer 230 is connected to the anode plate 110, and the second gas supply unit 220 further includes a first three-way valve 223, which has a first channel 2231, a second channel 2232 and a third channel 2233. The first channel 2231 is connected to the second gas storage tank 221, the second channel 2232 is connected to the gas mixer 230, and the third channel 2233 is connected to the cathode plate 120. In this embodiment, the gas in the second gas storage tank 221 is hydrogen. When a portion of the hydrogen enters the gas mixer 230 through the first channel 2231 and the second channel 2232, this portion of hydrogen is used to mix with the hydrogen and nitrogen in the first gas storage tank 211 to adjust the component ratio of the mixed gas introduced into the anode plate 110. At this time, a portion of the hydrogen can enter the cathode plate 120 through the first channel 2231 and the third channel 2233. In this way, this portion of hydrogen can be used to balance the pressure difference inside the separator 100. Under the condition that the internal pressure of the separator 100 can be rapidly increased, it is convenient to test the purity of the purified hydrogen flow rate. This prevents the pressure difference between the anode plate 110 and the cathode plate 120 inside the separator 100 from affecting the accuracy of the output gas flow rate test, and ensures the reliability of the separation and purification test system.

[0038] Furthermore, an explosion-proof solenoid valve 225 is provided in the second one-way valve 226 between the second pressure reducing valve 224. Since the gas in the second gas storage tank 221 is hydrogen, by providing the explosion-proof solenoid valve 225, the risk of explosion of high-purity hydrogen during the process of regulating the gas pressure input into the gas mixer 230 and the cathode plate 120 can be reduced, thus ensuring the stability of the overall test system.

[0039] Specifically, in this application, the separation and purification device 100 includes two end plates and an insulating sealing gasket, a gold-plated current collector, a GDL gas diffusion layer, an anode plate 110 and a cathode plate 120, a sealing ring, and an MEA membrane electrode disposed between the two end plates. A gas separation and purification test system is disposed between the two gold-plated current collectors.

[0040] Furthermore, the gas separation and purification test system also includes a humidification component 300, which is disposed between the gas supply component 200 and the separation and purification unit 100. The humidification component 300 is used to adjust the humidity of the gas entering the separation and purification unit 100. By setting the humidification component 300, the humidity of the gas entering the separation and purification unit 100 can be increased to meet the water content requirements of the separation and purification unit 100.

[0041] Specifically, the humidification assembly 300 includes a humidifier 310, a second three-way valve 320, and a diverting valve 330. The second three-way valve 320 has a fourth channel 321, a fifth channel 322, and a sixth channel 323. The fourth channel 321 is connected to the humidifier 310, and the fifth channel 322 is connected to the separator / purifier 100. The diverting valve 330 is connected to the gas supply assembly 200, the humidifier 310, and the sixth channel 323, respectively. The diverting valve 330 can adjust the flow direction of the gas to be tested. When the gas to be tested needs to be humidified, it enters the humidifier 310 through the diverting valve 330, and then enters the separator / purifier 100 through the fourth channel 321 and the fifth channel 322. When the gas to be tested does not need to be humidified, it enters the sixth channel 323 through the diverting valve 330, and then enters the separator / purifier 100 through the fifth channel 322. With the above configuration, the diverting valve 330, in conjunction with the second three-way valve 320, enables the gas introduced into the separator / purifier 100 to operate in both dry and wet states, meeting the requirements of different experimental conditions. In this embodiment, the humidification component 300 can be separately disposed between the gas mixer 230 and the anode plate 110, or separately disposed between the third channel 2233 and the cathode plate 120, or the humidification component 300 can be disposed between the gas mixer 230 and the anode plate 110, and between the third channel 2233 and the cathode plate 120, to meet the needs of different experimental conditions.

[0042] In one specific embodiment of this application, the humidifier 310 also has a heat exchange function. The humidifier 310 can heat the gas passing through the humidifier 310 to 80°C in order to achieve the best heat exchange and humidification effect.

[0043] Furthermore, the gas separation and purification test system also includes a heating component 600, which can heat the separation and purification unit 100. Specifically, the heating component 600 is disposed on the outer periphery of the separation and purification unit 100. The heating component 600 is a water bath circulating heater, which includes a water pump 610 and a constant temperature water tank 620. The water pump 610 drives the water in the constant temperature water tank 620 to perform hydrothermal treatment on the separation and purification unit 100, thereby controlling the reaction temperature inside the separation and purification unit 100.

[0044] Furthermore, the gas separation and purification testing system also includes an exhaust treatment component 500, which is connected to the exhaust port of the separator 100. Through this configuration, the exhaust treatment component 500 can perform moisture control, temperature control, and flow measurement on the gas purified by the separator 100, facilitating the collection of exhaust gas and data detection, thus improving the effectiveness of the gas separation and purification testing system.

[0045] Specifically, the exhaust gas treatment assembly 500 includes a gas-liquid separator 510 and a heat exchanger 520 connected in sequence. The gas-liquid separator 510 has a fluid inlet and a gas outlet. The fluid inlet is connected to the exhaust port of the separation and purification unit 100, and the gas outlet is connected to the heat exchange channel of the heat exchanger 520. Through this arrangement, the gas-liquid separator 510 can separate moisture from the gas purified by the separation and purification unit 100, reducing the water content of the gas and reducing the analytical error in the flow rate and composition of the purified gas. The heat exchanger 520 can heat or cool the purified gas to meet the temperature requirements for further analysis of the purified gas under different needs. Furthermore, the exhaust gas treatment assembly 500 also includes a fourth flow regulator 530, which is used to regulate the flow rate and velocity of the output gas.

[0046] Furthermore, the exhaust treatment assembly 500 also includes a third three-way valve 540, which has a seventh channel 541, an eighth channel 542, and a ninth channel 543. When the purified gas needs to be dried and heat-exchanged, the purified gas can enter the gas-liquid separator 510 and the heat exchanger 520 through the seventh channel 541 and the eighth channel 542. When the purified gas does not need to be dried and heat-exchanged, the purified gas can be directly discharged through the seventh channel 541 and the ninth channel 543, so as to meet the different needs of further analysis of the purified gas under different requirements and improve the applicability of the gas separation and purification test system.

[0047] In a specific embodiment of this application, the gas separation and purification test system further includes a back pressure component 400. The back pressure component 400 includes a pressure transmitter 410 and a back pressure valve 420. The pressure transmitter 410 and the back pressure valve 420 are installed on the pipeline connecting the separation and purification unit 100 and the exhaust treatment component 500. The pressure transmitter 410 and the back pressure valve 420 are used to control the exhaust pressure of the separation and purification unit 100. Through this configuration, the pressure transmitter 410 can convert the gas pressure into an electrical signal, facilitating real-time monitoring of the gas pressure by experimental personnel. The back pressure valve 420 ensures the gas pressure entering the next detection procedure. When the pressure of the gas discharged from the separation and purification unit 100 fails to reach the preset value of the back pressure valve 420, the back pressure valve 420 closes. When the pressure of the gas discharged from the separation and purification unit 100 reaches the preset value of the back pressure valve 420, the back pressure valve 420 opens, allowing the purified gas to enter the exhaust treatment component 500 to meet the gas pressure requirements for the next analysis step, ensuring the accuracy of the experimental results.

[0048] Furthermore, a back pressure assembly 400 is also provided on the anode plate 110. By providing the back pressure assembly 400, the stability inside the separation and purification unit 100 can be ensured by the back pressure valve 420. When the gas pressure inside the separation and purification unit 100 exceeds the preset safety value of the back pressure valve 420, the back pressure valve 420 can open to release the gas inside the separation and purification unit 100, reduce the gas pressure inside the separation and purification unit 100, and prevent the separation and purification unit 100 from being damaged or even exploded when the internal gas pressure rises rapidly, thus ensuring the stability and safety of the gas separation and purification test system.

[0049] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0051] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0052] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0053] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A testing system for gas separation and purification, characterized in that, The gas separation and purification testing system includes: A separation and purification unit (100) capable of separating a mixture of hydrogen and nitrogen; A gas supply assembly (200) includes a first gas supply unit (210), a second gas supply unit (220), and a gas mixer (230). The first gas supply unit (210) and the second gas supply unit (220) are respectively connected to the gas mixer (230), and the gas mixer (230) is connected to the separation and purification unit (100). The first gas supply unit (210) is used to provide a mixed gas of hydrogen and nitrogen and control the flow rate into the gas mixer (230). The second gas supply unit (220) is used to provide hydrogen or nitrogen and control the flow rate into the gas mixer (230). The gas mixer (230) is used to mix the gas supplied by the first gas supply unit (210) and the second gas supply unit (220) and supply it to the separation and purification unit (100). The gas separation and purification test system further includes a humidification component (300), which is disposed between the gas supply component (200) and the separation and purification unit (100). The humidification component (300) is used to adjust the humidity of the gas introduced into the separation and purification unit (100). The humidification assembly (300) includes: a humidifier (310); a second three-way valve (320), the second three-way valve (320) having a fourth channel (321), a fifth channel (322), and a sixth channel (323), the fourth channel (321) being connected to the humidifier (310), and the fifth channel (322) being connected to the separator and purifier (100); and a diverting valve (330), which is connected to the air supply assembly (200), the humidifier (310), and the sixth channel (323), respectively. The diverting valve (330) can adjust the flow direction of the gas to be tested. When the gas to be tested needs to be humidified, the gas to be tested is introduced into the humidifier (310) through the diverting valve (330), and then enters the separator (100) through the fourth channel (321) and the fifth channel (322). When the gas to be tested does not need to be humidified, the gas to be tested is introduced into the sixth channel (323) through the diverting valve (330), and then enters the separator (100) through the fifth channel (322).

2. The gas separation and purification testing system according to claim 1, characterized in that, The first gas supply unit (210) includes a first gas storage tank (211) and a first flow regulator (212). The first gas storage tank (211) is connected to the gas mixer (230). The first flow regulator (212) is used to regulate the flow rate of the gas supplied by the first gas supply unit (210) into the gas mixer (230). The second gas supply unit (220) includes a second gas storage tank (221) and a second flow regulator (222). The second gas storage tank (221) is connected to the gas mixer (230). The second flow regulator (222) is used to regulate the flow rate of the gas supplied by the second gas supply unit (220) into the gas mixer (230).

3. The gas separation and purification testing system according to claim 2, characterized in that, The gas separation and purification test system further includes a third flow regulator (231), which is located between the gas mixer (230) and the separation and purification unit (100). The third flow regulator (231) is used to regulate the flow rate of the gas introduced into the separation and purification unit (100) from the gas mixer (230).

4. The gas separation and purification testing system according to claim 2, characterized in that, The separation and purification unit (100) has an anode plate (110) and a cathode plate (120). The gas mixer (230) is connected to the anode plate (110). The second gas supply unit (220) further includes a first three-way valve (223). The first three-way valve (223) has a first channel (2231), a second channel (2232) and a third channel (2233). The first channel (2231) is connected to the second gas storage tank (221). The second channel (2232) is connected to the gas mixer (230). The third channel (2233) is connected to the cathode plate (120).

5. The gas separation and purification testing system according to claim 1, characterized in that, The gas separation and purification test system also includes a heating component (600) that can heat the separation and purification unit (100).

6. The gas separation and purification testing system according to claim 1, characterized in that, The gas separation and purification test system further includes an exhaust treatment component (500), which is connected to the exhaust port of the separation and purification unit (100).

7. The gas separation and purification testing system according to claim 6, characterized in that, The exhaust treatment assembly (500) includes a gas-liquid separator (510) and a heat exchanger (520) connected in sequence. The gas-liquid separator (510) has a fluid inlet and a gas outlet. The fluid inlet is connected to the exhaust port of the separator (100), and the gas outlet is connected to the heat exchange channel of the heat exchanger (520).

8. The gas separation and purification testing system according to claim 6, characterized in that, The gas separation and purification test system further includes a back pressure assembly (400), which includes a pressure transmitter (410) and a back pressure valve (420). The pressure transmitter (410) and the back pressure valve (420) are disposed on the pipeline connecting the separation and purification unit (100) and the exhaust treatment assembly (500). The pressure transmitter (410) and the back pressure valve (420) are used to control the exhaust pressure of the separation and purification unit (100).

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