Hydrogen production system and gas purification system and purification module thereof

Abstract

The embodiment of the invention provides a hydrogen production system and a gas purification system and a purification module thereof. A main system of the hydrogen production system is used for generating crude hydrogen and crude oxygen. The gas purification system includes an oxygen channel and a hydrogen channel within the purification module. The oxygen channel communicates with the main system and is used for filling a hydrogen removal catalyst and allowing crude oxygen to circulate. The hydrogen channel is communicated with the main system and is used for filling a deoxidizing catalyst and allowing crude hydrogen to circulate; when the crude oxygen is in contact with a dehydrogenation catalyst, performing an exothermic reaction to remove hydrogen and obtain purified oxygen, and preheating a hydrogen channel; and performing an exothermic reaction after the crude hydrogen is contacted with the oxygen removal catalyst to remove oxygen and obtain purified hydrogen. According to the technical scheme, an oxygen removal heater is omitted, energy is saved, oxygen generated after electrolysis is fully utilized, purified hydrogen and purified oxygen can be obtained at the same time, and the oxygen can be recycled.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production, and in particular to a hydrogen production system and a gas purification system and purification module thereof. Background Art

[0002] In the water electrolysis hydrogen production industry, since a diaphragm is usually used to separate the anode and cathode in the electrolysis of water, the hydrogen generated during the electrolysis process contains trace amounts of oxygen and cannot meet the hydrogen purity standards for industrial applications. Therefore, the hydrogen needs to be further introduced into a deoxygenation tower to remove trace amounts of oxygen through the action of a catalyst.

[0003] In order to meet the working conditions of the catalyst, an independent electric heating tube is required to heat the hydrogen and control the temperature of the hydrogen in the traditional deoxygenation process. In this way, in addition to consuming a large amount of heat energy and increasing the energy consumption of hydrogen production, the electric heating tube also requires supporting PLC logic control and its supporting intermediate relays, contactors, explosion-proof pipes, explosion-proof caps, thermocouples and other devices to control the heating temperature. Since the intermediate relays, contactors, electric heating tubes and other related electrical equipment are mostly consumable parts, they need to be frequently repaired and replaced, which increases the complexity, difficulty and cost of the entire hydrogen production.

[0004] In addition, during the hydrogen purification process, the catalyst in the deoxygenation tower and the desiccant in the drying tower need to be heated repeatedly, which consumes a lot of electricity. At the same time, the oxygen produced in the hydrogen production process usually retains some hydrogen, which is not recycled and directly discharged into the atmosphere. When the mixed hydrogen in the air accumulates to a certain amount (i.e. 4%, the industry usually requires a safety value of 2%), it is easy to cause hydrogen and oxygen to mix, which may lead to the risk of explosion and easily cause safety hazards. Summary of the invention

[0005] Various aspects of the present application provide a hydrogen production system and a gas purification system and purification module thereof to solve one or more of the above-mentioned problems.

[0006] An embodiment of the present application provides a hydrogen production system, including a main system and a gas purification system. The main system is used to produce crude hydrogen and crude oxygen. The gas purification system includes an oxygen channel and a hydrogen channel isolated from each other. The oxygen channel is connected to the main system to be filled with a dehydrogenation catalyst and to allow the crude oxygen to circulate. The hydrogen channel is connected to the main system to be filled with a deoxygenation catalyst and to allow the crude hydrogen to circulate. The crude oxygen undergoes an exothermic reaction after contacting the dehydrogenation catalyst to remove the hydrogen and obtain purified oxygen, and the hydrogen channel is preheated to increase the activity of the deoxygenation catalyst. The crude hydrogen undergoes an exothermic reaction after contacting the deoxygenation catalyst to remove the oxygen and obtain purified hydrogen.

[0007] In some embodiments of the present application, the gas purification system includes a purification module and a drying module. The purification module includes a shell, the oxygen channel and the hydrogen channel. The top of the shell is provided with a hydrogen inlet and an oxygen outlet, and the bottom is provided with a hydrogen outlet and an oxygen inlet. The oxygen channel is connected to the oxygen inlet and the oxygen outlet, and the hydrogen channel is connected to the hydrogen inlet and the hydrogen outlet. The drying module is connected to the hydrogen outlet to receive the purified hydrogen and perform drying, regeneration and adsorption procedures on the purified hydrogen.

[0008] In some embodiments of the present application, the purification module further comprises a tube body, which is disposed in the shell and separates the oxygen channel and the hydrogen channel in the shell, wherein the oxygen channel is located outside the tube body and the hydrogen channel is located inside the tube body.

[0009] In some embodiments of the present application, the shell is coated with a thermal insulation layer to prevent the heat energy released by the reaction from being transferred to the external environment.

[0010] In some embodiments of the present application, the deoxygenation catalyst includes a palladium-based catalyst and a platinum-based catalyst.

[0011] In some embodiments of the present application, the dehydrogenation catalyst includes a palladium-based catalyst and a platinum-based catalyst.

[0012] The present application also provides a gas purification system, which includes an oxygen channel and a hydrogen channel isolated from each other. The oxygen channel is used to fill a dehydrogenation catalyst and to supply crude oxygen, and the hydrogen channel is used to fill a dehydrogenation catalyst and to supply crude hydrogen. The crude oxygen undergoes an exothermic reaction after contacting the dehydrogenation catalyst to remove the hydrogen and obtain purified oxygen, and the hydrogen channel is preheated to improve the activity of the deoxygenation catalyst. The crude hydrogen undergoes an exothermic reaction after contacting the deoxygenation catalyst to remove the oxygen and obtain purified hydrogen.

[0013] The present application also provides a purification module, which includes a shell, an oxygen channel and a hydrogen channel. A hydrogen inlet and an oxygen outlet are provided at the top of the shell, and a hydrogen outlet and an oxygen inlet are provided at the bottom. The oxygen channel is connected to the oxygen inlet and the oxygen outlet, and is used to fill a dehydrogenation catalyst and to allow crude oxygen to circulate. The hydrogen channel is connected to the hydrogen inlet and the hydrogen outlet, and is used to fill a deoxygenation catalyst and to allow crude hydrogen to circulate. Wherein, the crude oxygen undergoes an exothermic reaction after contacting the dehydrogenation catalyst to remove the hydrogen and obtain purified oxygen, and the hydrogen channel is preheated to increase the activity of the deoxygenation catalyst. The crude hydrogen undergoes an exothermic reaction after contacting the deoxygenation catalyst to remove the oxygen and obtain purified hydrogen.

[0014] In the embodiment of the present application, the crude hydrogen and crude oxygen generated by electrolysis are received from the main system respectively through the configuration of the hydrogen channel and the oxygen channel in the purification module, so that the oxygen generated by electrolysis can be collected and reused. In addition, under the action of the dehydrogenation catalyst, the exothermic reaction generated in the dehydrogenation process of the crude oxygen can provide a preheating effect on the crude hydrogen and the deoxygenation catalyst in the hydrogen channel, improve the activity of the deoxygenation catalyst, and improve the deoxygenation efficiency and effect of the crude hydrogen. At the same time, under the action of the deoxygenation catalyst, the exothermic reaction generated in the deoxygenation process of the crude hydrogen can maintain the working temperature of the deoxygenation catalyst, ensure the stability of the deoxygenation procedure of the crude hydrogen, and obtain purified hydrogen. In the technical solution provided in the embodiment of the present application, the catalytic self-heating heat exchange deoxygenation method is used to replace the configuration of the existing electric heating catalytic deoxygenator, so it has the advantages of simple structure, reasonable use of heat and reduced energy consumption. At the same time, the oxygen generated by the electrolyzer is fully utilized, and the oxygen can be further purified to solve the potential safety hazard problem that the hydrogen contained therein is easily accumulated in the atmosphere after the oxygen is emptied. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 A block diagram of a hydrogen production system according to an embodiment of the present application;

[0017] Figure 2 It is a schematic plan view of a purification module according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0019] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0020] See also Figure 1 , an embodiment of the present application provides a hydrogen production system 1, which includes a main system 10 and a gas purification system 20. The main system 10 is used to produce crude hydrogen and crude oxygen, for example, using electrical energy to decompose alkaline water into crude hydrogen and oxygen in an electrolyzer. Since a diaphragm is usually used in the electrolyzer to separate the anode and cathode, hydrogen and oxygen interpenetration occurs during the electrolysis process, resulting in trace amounts of oxygen in the hydrogen generated by the electrolysis of water and trace amounts of hydrogen in the oxygen. For the sake of convenience, in the embodiment of the present application, the hydrogen with trace amounts of oxygen after the electrolysis of water is referred to as crude hydrogen, and the oxygen with trace amounts of hydrogen is referred to as crude oxygen, so as to better understand the technical solution of the present application. In addition, it can be understood that before entering the gas purification system, these crude hydrogen and crude oxygen can first be separated from the liquid in the gas through a gas-liquid separation procedure and discharged to the external environment.

[0021] like Figure 1 and Figure 2 As shown, the gas purification system 20 is connected to the main system 10, and is used to perform purification procedures such as deoxygenation on the crude hydrogen and dehydrogenation on the crude oxygen, and after the purification procedure, the purified hydrogen is cooled and dried, and finally hydrogen with a purity that meets industrial-grade application is obtained. Therefore, the gas purification system 20 is provided with an oxygen channel 20a and a hydrogen channel 20b that are isolated from each other.

[0022] In an embodiment of the present application, the oxygen channel 20a and the hydrogen channel 20b can be selectively filled with a dehydrogenation catalyst or a deoxygenation catalyst such as a palladium catalyst and / or a platinum catalyst. For example, in addition to receiving the crude oxygen and allowing it to circulate inside, the oxygen channel 20a is also used to fill a dehydrogenation catalyst, such as a molecular sieve-supported palladium catalyst, so that the crude oxygen contacts the dehydrogenation catalyst when circulating in the oxygen channel 20a, so that the trace hydrogen in the crude oxygen and the dehydrogenation catalyst react chemically and release heat. In addition to removing the trace hydrogen mixed in the crude oxygen, this heat can also serve to preheat the hydrogen channel 20b. Similarly, in addition to receiving the crude hydrogen and allowing it to circulate inside, the hydrogen channel 20b is also used to fill a deoxygenation catalyst, such as a molecular sieve-supported platinum catalyst, so that the crude hydrogen contacts the deoxygenation catalyst when circulating in the hydrogen channel 20b, so that the trace oxygen in the crude hydrogen is separated, and reacts chemically with the hydrogen to release heat. This heat can provide a preheating effect for the crude hydrogen entering the hydrogen channel 20b and the deoxidation catalyst filled in the hydrogen channel 20b. Therefore, the reaction efficiency of the trace oxygen in the crude hydrogen and the deoxidation catalyst can be improved, so that the trace oxygen is separated from the crude hydrogen as much as possible, and purified hydrogen and water are generated in the process.

[0023] In some embodiments of the present application, the gas purification system 20 includes a purification module 210 and a drying module 220. The purification module 210 includes a housing 211 and an oxygen channel 20a and a hydrogen channel 20b located in the housing 211, wherein a hydrogen inlet 211a and an oxygen outlet 211b are provided at the top of the housing 211, and a hydrogen outlet 211c and an oxygen inlet 211d are provided at the bottom. The oxygen channel 20a is connected to the oxygen inlet 211d and the oxygen outlet 211b, and the hydrogen channel 20b is connected to the hydrogen inlet 211a and the hydrogen outlet 211c.

[0024] In some embodiments of the present application, a tube body 212 is also provided in the shell 211. The tube body 212 may be, but is not limited to, arranged in an array in the shell 211 in a plurality of forms, and extending from the top of the shell 211 to the bottom; or the tube body 212 may be surrounded in the shell 211 in the form of reciprocating bending or circling, and separate the oxygen channel 20a and the hydrogen channel 20b in the shell 211. Among them, the hydrogen channel 20b is located in the tube body 212 (i.e., located in the tube layer), and the oxygen channel 20a is located outside the tube body 212, that is, in the space between the shell 211 and the tube body 212 (i.e., located in the shell layer), so that the hydrogen channel 20b is surrounded by the oxygen channel 20a to increase the contact area between each other and improve the heat conduction effect. In addition, in some other embodiments of the present application, the shell 211 is also coated with an insulation layer to block the heat energy of the reaction exothermic heat from being transferred to the external environment. In this way, heat loss can be prevented and burns to operators can be avoided.

[0025] The drying module 220 is connected to the hydrogen outlet 211c of the purification module 210 to receive the purified hydrogen and perform drying, regeneration and adsorption procedures on the purified hydrogen. Generally speaking, a condenser 30 and a steam-water separation device 40 are connected in series between the drying module 220 and the purification module 210. The purified hydrogen and water generated in the purification module 210 are discharged from the hydrogen outlet 211c to the outside of the purification module 210, and enter the drying module 220 after being cooled and separated by the condenser 30 and the steam-water separation device 40.

[0026] The drying module 220 includes a plurality of drying units 221, and each drying unit 221 includes a steam-water separation device 2211, a condenser 2212 and a drying tower 2213 connected in series. The drying units 221 work alternately under different working conditions to perform drying, regeneration and adsorption on the purified hydrogen.

[0027] The following further describes the application scenarios of the embodiments of the present application and the technical effects that can be achieved.

[0028] In the main system 10, alkaline water is electrolyzed to produce crude hydrogen with trace oxygen and crude oxygen with trace hydrogen. Crude oxygen, as raw oxygen, enters the oxygen channel 20a (i.e., the shell layer in the shell 211) from the oxygen inlet 211c located at the lower side of the shell 211 of the purification module 210. When the crude oxygen passes through the dehydrogenation catalyst in the shell layer, the oxygen reacts with the separated trace hydrogen to release heat under the action of the dehydrogenation catalyst. At this time, as the crude oxygen flows from bottom to top through the dehydrogenation catalyst bed, the heat generated by the exothermic reaction preheats the deoxygenation catalyst in the hydrogen channel 20b and the crude hydrogen (which serves as raw hydrogen) entering from the top of the shell, thereby improving the activity of the deoxygenation catalyst.

[0029] When the crude hydrogen flows through the deoxidation catalyst in the hydrogen channel 20b (i.e., the tube layer in the shell 211), the hydrogen reacts with the separated trace oxygen to release heat under the action of the deoxidation catalyst, further increasing the gas temperature. Therefore, after the reaction is completed, the oxygen content in the hydrogen flowing out from the hydrogen outlet 211d at the lower end of the shell 211 can be greatly reduced, thereby obtaining purified hydrogen. The water generated by the exothermic reaction flows out of the purification module 210 along with the purified hydrogen, and is adsorbed and eliminated in the subsequent drying module.

[0030] The technical solution of the embodiment of the present application utilizes catalytic self-heat exchange for deoxidation, making full use of the crude oxygen produced by water electrolysis, and passing it into the oxygen channel 20a of the purification module 210. Under the action of the dehydrogenation catalyst, the reaction releases heat. At the same time, this part of heat is used to preheat the crude hydrogen produced by water electrolysis, and the deoxidation catalyst in the hydrogen channel 20b reacts with the oxygen in the crude hydrogen to release heat, thereby further heating the gas.

[0031] In this process, the hydrogen-oxygen catalytic reaction can be represented by the following formula 1:

[0032]

[0033] Its ΔH = -241.8 KJ / mol.

[0034] Assuming that the hydrogen content of crude oxygen produced by the electrolytic cell throughout its life cycle is 0.75-2%, the oxygen content in the crude hydrogen is 0-1%, and the amount of palladium-loaded molecular sieve with a catalyst loading of 0.1% is 300g.

[0035] Application Example 1: The hydrogen content in crude oxygen is 1.5%, the oxygen content in crude hydrogen is 1%, and the crude hydrogen output is 2Nm 3 / H, crude oxygen production is 1Nm 3 / H.

[0036] Specific heat capacity of hydrogen: 14.05KJ / (Kg·K).

[0037] Specific heat capacity of oxygen: 0.918KJ / (Kg·K).

[0038] The specific heat capacity of the molecular sieve in the shell is 0.95KJ / (Kg·K).

[0039] The molar volume constant of gas under standard conditions is 22.4 L / mol.

[0040] From this, the heat released when the hydrogen in the crude oxygen passes through the dehydrogenation catalyst can be calculated.

[0041] Among them, the amount of hydrogen involved in the reaction in the crude oxygen, n(H2), is:

[0042]

[0043] n(H2)=0.669mol

[0044] At this time, the reaction heat Q released during the reaction can be expressed by the following formula 2:

[0045] Q=n(H2)×ΔH Formula 2.

[0046] Therefore, the reaction heat Q can be obtained as:

[0047] Q=0.669×(-241.8)=161.76KJ.

[0048] In addition, the reaction heat can also be expressed by the following formula 3:

[0049] Q=cmΔT=(c1m1+c2m2)ΔT, that is, ΔT=Q / (c1m1+c2m2) Formula 3.

[0050] Wherein, c1 is the specific heat capacity of the molecular sieve; c2 is the specific heat capacity of oxygen; m1 is the mass of the molecular sieve; m2 is the mass of oxygen; and ΔT is the temperature difference.

[0051] Therefore, it can be calculated that when the hydrogen in the crude oxygen passes through the dehydrogenation catalyst, the temperature (ΔT1) of the molecular sieve composed of the dehydrogenation catalyst and the crude oxygen can be increased.

[0052] Right now,

[0053] Similarly, by calculating the heat released when the oxygen in the crude hydrogen passes through the deoxygenation catalyst, it can be further calculated that when the oxygen in the crude hydrogen passes through the deoxygenation catalyst, the temperature of the deoxygenation catalyst molecular sieve and hydrogen (ΔT2) can be increased to about 120°C.

[0054] Furthermore, after the crude oxygen and crude hydrogen undergo the above-mentioned exothermic reaction in the purification module, the hydrogen content in the crude oxygen can be reduced to 1 ppm to obtain purified oxygen, and the oxygen content in the crude hydrogen can be reduced to less than 2 ppm to obtain purified hydrogen.

[0055] Application Example 2: The hydrogen content in the crude oxygen is 0.75%, and the crude oxygen output is 1Nm 3 / H.

[0056] At this time, the amount of hydrogen participating in the reaction in the crude oxygen, n(H2), is:

[0057]

[0058] n(H2)=0.335mol

[0059] Therefore, the heat of reaction Q released by the reaction at this time is:

[0060] Q=n(H2)×ΔΗ=0.335×241.8=81KJ

[0061] And because Q = cmΔT = (c1m1+c2m2)ΔT

[0062] Thus, it can be known that when the hydrogen in the crude oxygen passes through the dehydrogenation catalyst, the temperature of the molecular sieve composed of the dehydrogenation catalyst and the crude oxygen can be increased to:

[0063]

[0064] Application Example 3: The hydrogen content in the crude oxygen is 2%, and the crude oxygen output is 1Nm 3 / H.

[0065] At this time, the amount of hydrogen participating in the reaction in the crude oxygen, n(H2), is:

[0066]

[0067] n(H2)=0.893mol

[0068] Therefore, the heat of reaction Q released by the reaction at this time is:

[0069] Q=n(H2)×ΔΗ=0.893×241.8=215.89KJ

[0070] And because Q = cmΔT = (c1m1 + c2m2)ΔTΔT = Q / (c1m1 + c2m2)

[0071] Thus, it can be known that when the hydrogen in the crude oxygen passes through the dehydrogenation catalyst, the temperature of the molecular sieve composed of the dehydrogenation catalyst and the crude oxygen can be increased to:

[0072]

[0073] It should be noted that the hydrogen content in the crude oxygen during operation of the water electrolysis hydrogen production device is currently in the range of 0.5%-2%. When it exceeds 2%, the water electrolysis hydrogen production system will shut down. Therefore, there is no need to consider the situation where the hydrogen content in the crude oxygen is greater than 2%.

[0074] In addition, in some application examples of the present application, the crude oxygen temperature can be increased to 76-160°C.

[0075] Based on the above, the technical solution provided in the embodiment of the present application can purify oxygen and reduce or remove hydrogen in oxygen. At the same time, under the action of a dehydrogenation catalyst, the heat generated by the reaction of oxygen and trace hydrogen separated from oxygen is applied to preheat the hydrogen at the outlet of the electrolyzer. In addition to reducing energy consumption, the oxygen can be further purified to avoid the continuous focusing of hydrogen in oxygen when oxygen mixed with trace hydrogen is emptied, causing safety hazards. By reducing the hydrogen content at the oxygen outlet of the electrolyzer, the risk of hydrogen enrichment caused by oxygen emissions is reduced. At the same time, the purified oxygen can be collected and reused.

[0076] In addition, the technical solution provided in the embodiment of the present application can effectively deoxygenate hydrogen, and the heat generated in the reaction between hydrogen and oxygen in hydrogen is used to provide the working temperature of the deoxygenation catalyst, which saves the additional heat supply for deoxygenation on the one hand, and simplifies the deoxygenation step of hydrogen on the other hand, making the deoxygenation of hydrogen simple. Due to the reasonable use of the chemical reaction of hydrogen and oxygen, the heat obtained is comprehensively utilized to replace the electric heating catalytic deoxygenator, so the use of the deoxygenation heater can be omitted, energy is saved, and the energy consumption of hydrogen production is greatly reduced and the cost of hydrogen production is reduced.

[0077] The above is only the embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A hydrogen production system, characterized in that: include: a main system for producing crude hydrogen and crude oxygen; as well as A gas purification system, comprising an oxygen channel and a hydrogen channel isolated from each other, wherein the oxygen channel is connected to the main system to be filled with a dehydrogenation catalyst and to allow the crude oxygen to flow, and the hydrogen channel is connected to the main system to be filled with a deoxygenation catalyst and to allow the crude hydrogen to flow; The crude oxygen undergoes an exothermic reaction after contacting the dehydrogenation catalyst to remove the hydrogen and obtain purified oxygen, and the hydrogen channel is preheated to improve the activity of the deoxygenation catalyst. The crude hydrogen undergoes an exothermic reaction after contacting the deoxygenation catalyst to remove the oxygen and obtain purified hydrogen.

2. The hydrogen production system according to claim 1, characterized in that: The gas purification system comprises: A purification module, comprising a shell, the oxygen channel and the hydrogen channel, wherein the top of the shell is provided with a hydrogen inlet and an oxygen outlet, the bottom is provided with a hydrogen outlet and an oxygen inlet, the oxygen channel is connected to the oxygen inlet and the oxygen outlet, and the hydrogen channel is connected to the hydrogen inlet and the hydrogen outlet; and The drying module is connected to the hydrogen outlet, and is used for receiving the purified hydrogen and performing drying, regeneration and adsorption procedures on the purified hydrogen.

3. The hydrogen production system according to claim 2, characterized in that: The purification module further includes a tube body, which is disposed in the shell and separates the oxygen channel and the hydrogen channel in the shell, wherein the oxygen channel is located outside the tube body, and the hydrogen channel is located inside the tube body.

4. The hydrogen production system according to claim 2, characterized in that: The shell is coated with a heat-insulating layer to prevent the heat energy released by the reaction from being transferred to the external environment.

5. The hydrogen production system according to claim 1, characterized in that: The deoxygenation catalyst includes a palladium-based catalyst and a platinum-based catalyst.

6. The hydrogen production system according to claim 1, characterized in that: The dehydrogenation catalyst includes a palladium-based catalyst and a platinum-based catalyst.

7. A gas purification system, characterized in that: It comprises an oxygen channel and a hydrogen channel which are isolated from each other, wherein the oxygen channel is used to be filled with a dehydrogenation catalyst and to allow crude oxygen to flow, and the hydrogen channel is used to be filled with a deoxygenation catalyst and to allow crude hydrogen to flow; The crude oxygen undergoes an exothermic reaction after contacting the dehydrogenation catalyst to remove the hydrogen and obtain purified oxygen, and the hydrogen channel is preheated to improve the activity of the deoxygenation catalyst. The crude hydrogen undergoes an exothermic reaction after contacting the deoxygenation catalyst to remove the oxygen and obtain purified hydrogen.

8. The gas purification system according to claim 7, characterized in that: It also includes a tube body, which is arranged in the shell and separates the oxygen channel and the hydrogen channel in the shell, wherein the oxygen channel is located outside the tube body, and the hydrogen channel is located inside the tube body.

9. The gas purification system according to claim 7, characterized in that: The shell is coated with a heat-insulating layer to prevent the heat energy released by the reaction from being transferred to the external environment.

10. A purification module, characterized in that: include: A shell having a hydrogen inlet and an oxygen outlet at the top and a hydrogen outlet and an oxygen inlet at the bottom; an oxygen channel, connected to the oxygen inlet and the oxygen outlet, for filling a dehydrogenation catalyst and allowing crude oxygen to flow; as well as A hydrogen channel, connected to the hydrogen inlet and the hydrogen outlet, for filling a deoxygenation catalyst and allowing crude hydrogen to flow; The crude oxygen undergoes an exothermic reaction after contacting the dehydrogenation catalyst to remove the residual hydrogen and obtain purified oxygen, and the hydrogen channel is preheated to improve the activity of the deoxygenation catalyst. The crude hydrogen undergoes an exothermic reaction after contacting the deoxygenation catalyst to remove the oxygen and obtain purified hydrogen.

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