Device and process for dehydrogenation of hydrogen-containing gas

Abstract

The present invention discloses a device and process for dehydrogenation of hydrogen-containing gas, the device comprises a static mixer, a fan, a dehydrogenation composite device and a condenser which are connected in sequence; the hydrogen-containing gas inlet and the air inlet are connected to the static mixer, and valve No. Ⅰ and hydrogen analyzer No. Ⅰ, valve No. Ⅲ and flow meter are respectively arranged; valve No. Ⅴ and hydrogen analyzer No. Ⅱ are arranged between the fan and the dehydrogenation composite device; hydrogen analyzer No. Ⅲ, valve No. Ⅶ and valve No. X are respectively arranged at the outlet of the condenser; the process comprises: (i) introducing hydrogen-containing gas into the device; (ii) dehydrogenation treatment; (iii) shutdown protection treatment. The present invention realizes the treatment of hydrogen-containing gas, controls the hydrogen concentration in the tail gas within an extremely low concentration range of 0.2%, thereby reducing the safety risks caused by hydrogen; the whole device is integrated in a movable box cabinet, realizes rapid movement, installation and debugging, and the device can be placed outdoors to save indoor space.

Description

Technical Field

[0001] The invention belongs to the fields of environmental protection, chemical industry and new energy, and specifically relates to a device and a process for dehydrogenation treatment of hydrogen-containing gas. Background Art

[0002] With the development of the new energy industry, hydrogen refueling stations and nuclear power plants are receiving more and more attention. However, since hydrogen is a highly dangerous gas that is flammable and explosive, has a low density and is easy to gather. When the concentration exceeds the explosion limit of hydrogen, there will be a risk of deflagration. Therefore, the safety issues it brings are also of concern to people. For example, hydrogen leakage at hydrogen refueling stations, hydrogen accumulation in the containment in the event of a nuclear power plant accident, and some chemical processes that use or produce hydrogen, such as hydrogenation and dehydrogenation of rare metal powder, in these accidents and processes, if hydrogen is not handled in time, when the concentration of hydrogen in the air reaches 4~75vol.%, there is a possibility of explosion. Therefore, when hydrogen leaks or is produced, it needs to be dehydrogenated to avoid explosions, especially in the radioactive environment of the nuclear industry. The gas cannot be directly diluted and discharged into the atmosphere, but needs to be passed through the exhaust filtration system. Due to its low density, hydrogen is easy to accumulate in layers in the ventilation duct, which is more risky.

[0003] At present, most of the existing hydrogen removal processes and devices use the principle of hydrogen-oxygen catalytic oxidation, mainly using hydrogen-containing gas to diffuse into a composite device for catalytic oxidation. A passive hydrogen composite device is used, which has a low treatment efficiency and is not suitable for treating hydrogen-containing tail gas from some chemical reactions and emergency treatment of hydrogen leakage in hydrogen stations. Based on this, it is necessary to provide a highly efficient hydrogen removal treatment solution for hydrogen-containing gas. Summary of the invention

[0004] The present invention is proposed to overcome the shortcomings of the prior art, and its purpose is to provide a device and process for dehydrogenation of hydrogen-containing gas.

[0005] The present invention is achieved through the following technical solutions:

[0006] A device for dehydrogenation of hydrogen-containing gas comprises a static mixer, a fan, a dehydrogenation composite device and a condenser which are connected in sequence; a hydrogen-containing gas inlet and an air inlet are connected to the static mixer through pipelines respectively, a No. I valve and a No. I hydrogen analyzer are arranged on the pipeline between the hydrogen-containing gas inlet and the static mixer, a No. III valve and a flow meter are arranged on the pipeline between the air inlet and the static mixer according to the air flow direction; a No. V valve is arranged on the pipeline between the fan and the dehydrogenation composite device inlet, and a No. II hydrogen analyzer is arranged between the fan and the No. V valve; the condenser outlet is connected to two parallel branch pipelines, and a No. VII valve and a No. X valve are arranged on the branch pipelines respectively, and a No. III hydrogen analyzer is arranged at the condenser outlet.

[0007] In the above technical solution, it also includes a nitrogen inlet, which is connected to the static mixer through a pipeline, and a No. II valve is arranged on the pipeline between the nitrogen inlet and the static mixer.

[0008] The pipeline connected between the static mixer and the hydrogen-containing gas inlet extends into the static mixer, and a laminar flow baffle is arranged at the end of the pipeline.

[0009] In the above technical solution, a bypass is provided between the fan and the condenser, and a No. IV valve is provided on the bypass.

[0010] In the above technical solution, a flame arrester is provided between the No. V valve and the inlet of the hydrogen removal composite device; and an air filter is also provided between the air inlet and the No. III valve.

[0011] In the above technical solution, the hydrogen removal composite device includes a shell and a heating bed, a filling bed and a catalytic bed arranged in the shell from bottom to top, an inlet is arranged at the lower part of the shell, and the inlet is connected to the heating bed, an outlet is arranged at the top of the shell, and a bursting disc safety pressure relief device is arranged at the top of the shell;

[0012] In the above technical solution, the model of the bursting disc safety pressure relief device is YF50-0.8-400A;

[0013] In the above technical solution, the power of the heating bed 51 is determined according to the amount of gas to be processed. The heating bed adopts a resistance heater, which is fixed inside the shell by a flange. Generally, it processes 200m³ / h of mixed gas with a power of about 9.5kW.

[0014] In the above technical solution, the packed bed includes layer plates and inert ceramic balls filled between the layer plates, and the height of the packed bed is 30 to 50 times the diameter of the inert ceramic balls used for filling;

[0015] In the above technical solution, the catalytic bed includes a box body and a catalyst filled in the box body, a handle is provided on the top of the box body, a clamping ring is formed on the bottom, a convex ring is formed on the upper inner wall of the shell, a sealing groove matching the clamping ring is formed on the top surface of the convex ring, and high-temperature rock wool is filled between the clamping ring and the sealing groove.

[0016] In the above technical solution, the diameter d and height h of the catalyst bed are calculated according to the following formula:

[0017]

[0018] Among them, Q is used to represent the maximum gas flow rate into the hydrogen removal composite device, unit is m 3 / h, S is used to characterize the space velocity of the catalyst used on the catalytic bed, the unit is h -1 .

[0019] A process for a hydrogen-containing gas dehydrogenation treatment device, comprising the following steps:

[0020] (i) Introducing hydrogen-containing gas into the device

[0021] Before starting the equipment, open valves VIII and IX to introduce cooling water, open valves I and V, adjust valve III to the maximum opening, turn on the fan, and introduce hydrogen-containing gas into the device from the hydrogen-containing gas inlet. Hydrogen analyzer I measures the hydrogen concentration. The system adjusts the opening of valve III according to the hydrogen concentration, and adjusts the hydrogen concentration mixed in the air measured by hydrogen analyzer II to below 2.5 vol.%;

[0022] (ii) Hydrogen removal treatment

[0023] After the hydrogen-containing gas is heated to 140~160℃ by the heating bed of the hydrogen removal composite device, the gas flows through the catalyst bed for catalytic oxidation. The high-temperature gas after catalysis carries the generated water vapor into the condenser for gas-liquid separation. The separated gas is measured by No. III hydrogen analyzer. When the concentration meets the standard, it is discharged into the ventilation system. If it does not meet the standard, it returns to the hydrogen-containing gas inlet for further treatment.

[0024] In the above technical solution, during the treatment of step (ii), if the hydrogen concentration measured by hydrogen analyzer No. II is higher than 3 vol.%, valve No. V is closed, valve No. IV and valve No. X are opened, and the gas does not pass through the hydrogen removal composite device, but returns to the hydrogen-containing gas inlet to continue mixing and dilution; if the hydrogen concentration measured by hydrogen analyzer No. II is always higher than 3 vol.%, valve No. II is opened, and a large amount of compressed nitrogen is introduced for forced dilution and purging.

[0025] In the above technical solution, the following steps are also included:

[0026] (iii) Shutdown protection processing

[0027] When the equipment is out of service, close valves No. Ⅰ, No. Ⅲ, and No. Ⅳ, open valve No. Ⅱ, introduce nitrogen for purging, and finally, close all valves to keep the catalyst in a nitrogen-protected state.

[0028] The beneficial effects of the present invention are:

[0029] The present invention provides a device and process for dehydrogenation of hydrogen-containing gas, which can be applied to hydrogenation stations, nuclear power plant containments, and chemical processes that use or produce hydrogen, and is particularly suitable for emergency disposal of these places and processes. The present invention realizes the treatment of hydrogen-containing gas, controls the hydrogen concentration in the tail gas within an extremely low concentration range of 0.2%, thereby reducing the safety risks caused by hydrogen; realizes real-time monitoring of the concentrations of original hydrogen, mixed hydrogen, and compounded hydrogen in the tail gas, and dynamically adjusts the air (oxygen) flow rate according to the hydrogen content in the tail gas, and reduces the volume of gas that needs catalytic compounding while meeting the compounding requirements. In addition, a catalyst protection program is added to protect the catalyst by nitrogen filling during the working interval to avoid catalyst poisoning and extend the service life. On the other hand, the entire device is integrated in a movable box cabinet, which is convenient for rapid transportation, installation, and use of the device, and due to the protection of the cabinet, the device can be used outdoors, reducing the pressure on indoor use space. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional structural schematic diagram of the device for dehydrogenation of hydrogen-containing gas according to the present invention (excluding the cabinet);

[0031] Figure 2 It is a principle diagram of the process for dehydrogenation treatment of hydrogen-containing gas according to the present invention;

[0032] Figure 3 This is a front view of a cabinet of the device for dehydrogenation of hydrogen-containing gas according to the present invention ( Figure 4 Center AA view);

[0033] Figure 4 yes Figure 3 Middle BB view;

[0034] Figure 5 yes Figure 4 Middle CC view;

[0035] Figure 6 yes Figure 5 Middle K-direction view (removing the cabinet top cover);

[0036] Figure 7 It is a schematic structural diagram of a hydrogen removal composite device in a device for hydrogen removal treatment of hydrogen-containing gas according to the present invention;

[0037] Figure 8 It is a schematic diagram of the catalyst bed structure and assembly position of the hydrogen removal composite device in the device for hydrogen removal treatment of hydrogen-containing gas of the present invention;

[0038] Fig. 9 It is a schematic structural diagram of a static mixer in a device for dehydrogenation of hydrogen-containing gas according to the present invention.

[0039] in:

[0040] 1 Cabinet 2 Platform

[0041] 3 Static mixer 4 Fan

[0042] 5 Hydrogen removal composite device 6 Condenser

[0043] 7 Air filter 8 Electric control cabinet

[0044] 9 Hydrogen analyzer cabinet 10 Hydrogen gas inlet

[0045] 11 Nitrogen inlet 12 Air inlet

[0046] 13 Condensate inlet 14 Condensate outlet

[0047] 15 Treated gas outlet 16 Flow meter

[0048] 17 Flame arrester 18 No. Ⅰ hydrogen analyzer

[0049] 19 No. Ⅱ Hydrogen Analyzer 20 No. Ⅲ Hydrogen Analyzer

[0050] 21 No. Ⅰ sampling pump 22 No. Ⅱ sampling pump

[0051] 23 No. Ⅲ sampling pump 24 No. Ⅰ valve

[0052] 25 No. Ⅱ valve 26 No. Ⅲ valve

[0053] 27 No. IV valve 28 No. V valve

[0054] 29 No. VI valve 30 No. VII valve

[0055] 31 No. VIII valve 32 No. IX valve

[0056] 33 Cooling water outlet 34 No. Ⅹ valve

[0057] 35 Laminar flow baffle

[0058] 50 housing 51 heating bed

[0059] 52 Packed bed 53 Catalytic bed

[0060] 54 Bursting disc safety pressure relief device 55 Import

[0061] 56 Exit

[0062] 501 convex ring 502 high temperature rock wool

[0063] 531 Box 532 Handle

[0064] 533 Snap ring.

[0065] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0066] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the device and process for dehydrogenation treatment of hydrogen-containing gas of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0067] Example 1

[0068] like Figures 1 to 6 As shown, a device for dehydrogenation of hydrogen-containing gas comprises a static mixer 3, a fan 4, a dehydrogenation composite device 5 and a condenser 6 which are connected in sequence; a bypass is arranged between the fan 4 and the condenser 6.

[0069] The hydrogen inlet 10, the nitrogen inlet 11 and the air inlet 12 are connected to the static mixer 3 through pipelines. A No. I valve 24 and a No. I hydrogen analyzer 18 are arranged on the pipeline between the hydrogen inlet 10 and the static mixer 3. A No. II valve 25 is arranged on the pipeline between the nitrogen inlet 11 and the static mixer 3. An air filter 7, a No. III valve 26 and a flow meter 16 are arranged on the pipeline between the air inlet 12 and the static mixer 3 according to the air flow direction.

[0070] A No. V valve 28 and a flame arrester 17 are arranged on the pipeline between the fan 4 and the inlet of the hydrogen removal composite device 5 according to the air flow direction, and a No. II hydrogen analyzer 19 is arranged between the fan 4 and the No. V valve 28;

[0071] A valve IV 27 is provided on the bypass between the fan 4 and the condenser 6;

[0072] A cooling water outlet 33 is provided at the lowest point of the bottom of the condenser 6, a No. VI valve 29 is provided at the cooling water outlet 33, and a No. VIII valve 31 and a No. IX valve 32 are provided at the condensate inlet 13 and the condensate outlet 14 of the condenser 6, respectively; the outlet of the condenser 6 is connected to two parallel branch pipes, one branch pipe is connected to the ventilation system for discharging the gas that meets the standards after treatment, and a No. VII valve 30 is provided on this pipe, and the other branch pipe is connected to the hydrogen-containing inlet 10, and a No. X valve 34 is provided on this pipe for the circulation of the gas that does not meet the standards, and a No. III hydrogen analyzer 20 is provided at the outlet of the condenser 6, and the No. III hydrogen analyzer 20 is provided before the No. VII valve 30 and the No. X valve 34 on the branch pipe, and is used to judge whether the treated gas meets the standards;

[0073] The hydrogen analyzers No. Ⅰ to No. Ⅲ 18 to 20 are arranged in a hydrogen analyzer cabinet, and the hydrogen analyzers No. Ⅰ to No. Ⅲ 18 to 20 and the pipelines at the corresponding sampling points are respectively provided with sampling pumps No. Ⅰ to No. Ⅲ 21 to 23 corresponding to each other.

[0074] The device for dehydrogenating hydrogen-containing gas also includes an electric control cabinet 8 for placing electric control equipment, and a cabinet 1 covering the static mixer 3, the fan 4, the dehydrogenating composite device 5, the condenser 6, the electric control cabinet 8 and the outside of the connecting pipeline. The cabinet 1 is placed on a platform 2, and the platform 2 is a concrete or steel frame platform.

[0075] The condenser 6, the hydrogen analyzer cabinet 9, and the hydrogen removal composite device 5 are arranged on the same side of the cabinet 1, and the hydrogen inlet 10, the nitrogen inlet 11, the cooling water inlet 13, the cooling water outlet 14, the treated gas outlet 15 and the condensed water outlet 33 are located on the same side of the cabinet 1; the hydrogen analyzer cabinet 9 and the electric control cabinet 8 are placed on the far right of the cabinet 1 to facilitate personnel to enter and operate.

[0076] The air filter 7 is a replaceable air filter. When the air flow is too small, the filter needs to be checked and replaced. The air filter 7 is a conventional fiber coarse filter, and any model can be used in this application.

[0077] like Figure 7 , 8 The hydrogen removal composite device 5 comprises a shell 50 and a heating bed 51, a packed bed 52 and a catalytic bed 53 arranged in the shell 50 from bottom to top, an inlet 55 is arranged at the lower part of the shell 50, and the inlet 55 is communicated with the heating bed 51, an outlet 56 is arranged at the top of the shell 50, and a bursting disc safety pressure relief device 54 is arranged at the top of the shell 50;

[0078] The model of the bursting disc safety pressure relief device 54 is YF50-0.8-400A;

[0079] The power of the heating bed 51 is determined according to the amount of gas to be processed. The heating bed adopts a resistance heater, which is fixed inside the shell by a flange. Generally, it processes 200m³ / h of mixed gas with a power of about 9.5kW.

[0080] The packed bed 52 includes layers and inert ceramic balls filled between the layers. The height of the packed bed 52 is 30 to 50 times the diameter of the inert ceramic balls used for filling.

[0081] The catalytic bed 53 includes a box body 531 and a catalyst filled in the box body. A handle 532 is provided on the top of the box body 531, and a clamp ring 533 is formed on the bottom. A convex ring 501 is formed on the upper inner wall of the shell 50, and a sealing groove matched with the clamp ring 533 is formed on the top surface of the convex ring 501. High-temperature rock wool 502 is filled between the clamp ring 533 and the sealing groove. After assembly, the clamp ring 533 squeezes the high-temperature rock wool 502 to achieve sealing. The catalytic bed 53 is filled as a whole in the form of a boxed catalyst, and a handle 532 is provided to facilitate the replacement of the catalytic bed 53 as a whole.

[0082] The diameter d and height h of the catalyst bed 53 are calculated according to the following formula:

[0083]

[0084] Wherein, Q is used to represent the maximum gas flow rate entering the hydrogen removal composite device 5, and the unit is m 3 / h, S is used to characterize the space velocity of the catalyst used on the catalytic bed, the unit is h -1 The diameter d can be determined according to the diameter of the heating bed, for example, the two can be set equal.

[0085] like Fig. 9 As shown, the static mixer 3 is an improved conventional mixer, and the improvement is the arrangement of the pipeline connected to the hydrogen-containing gas inlet 10. The pipeline connected between the static mixer 3 and the hydrogen-containing gas inlet 10 extends into the static mixer 3, and a laminar flow baffle 35 is arranged at the end of the pipe. This design can form a negative pressure when the air flow rate is accelerated, preventing air from entering the hydrogen pipeline and causing back mixing.

[0086] Example 2

[0087] Based on Example 1, a process for a device for dehydrogenation treatment of hydrogen-containing gas, such as Figure 2 As shown, the following steps are included:

[0088] (i) Introducing hydrogen-containing gas into the device

[0089] Before starting the equipment, open valve No. VIII 31 and valve No. IX 32, introduce cooling water, open valve No. I 24 and valve No. V 28, adjust valve No. III 26 to the maximum opening, turn on fan 4, hydrogen-containing gas is introduced into the device from hydrogen-containing gas inlet 10, hydrogen analyzer No. I 18 measures the hydrogen concentration, and the system adjusts the opening of valve No. III 26 according to the hydrogen concentration, and adjusts the hydrogen concentration mixed in the air measured by hydrogen analyzer No. II 29 to below 2.5 vol.%;

[0090] (ii) Hydrogen removal treatment

[0091] After the hydrogen-containing gas is heated to a temperature of about 140-160°C by the heating bed 51 of the hydrogen removal composite device 5, the gas flows through the catalyst bed 53 for catalytic oxidation, and the high-temperature gas after catalysis carries the generated water vapor into the condenser 6 for gas-liquid separation. The separated gas is measured by the No. III hydrogen analyzer 20, and after the concentration reaches the standard, it is discharged into the ventilation system; if the hydrogen concentration measured by the No. II hydrogen analyzer is higher than 3 vol.%, the No. V valve is closed, the No. IV valve and the No. X valve are opened, and the gas does not pass through the hydrogen removal composite device, but returns to the hydrogen-containing gas inlet to continue mixing and diluting; if the hydrogen concentration measured by the No. II hydrogen analyzer is always higher than 3 vol.%, the No. II valve is opened, and a large amount of compressed nitrogen is introduced for forced dilution and purging to avoid accidents caused by excessive hydrogen concentration.

[0092] (iii) Shutdown protection processing

[0093] When the equipment is out of service, close valves No. Ⅰ 24, No. Ⅲ 26, and No. Ⅳ 27, open valve No. Ⅱ 25, and introduce nitrogen for purging. Finally, close all valves to keep the catalyst in a nitrogen-protected state to avoid catalyst poisoning and affect its service life.

[0094] The device of the present invention is integrated in a cabinet, so that rapid movement, installation and debugging are realized, and the device can be placed outdoors to save indoor space.

[0095] The mixed hydrogen-argon gas was introduced for testing. The hydrogen elimination results are shown in Table 1. The test results show that the hydrogen concentration dropped to 0.2%, achieving good hydrogen elimination. (After treatment, the hydrogen concentration was too low, and the thermal conductivity hydrogen meter fluctuated within the normal range, and it was normal to show a slightly negative value).

[0096] Table 1 Hydrogen-argon mixed gas test data

[0097]

[0098] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0099] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0100] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0101] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A process for a device for dehydrogenation of hydrogen-containing gas, characterized in that: The device comprises a static mixer (3), a fan (4), a hydrogen removal composite device (5) and a condenser (6) which are connected in sequence, and further comprises a nitrogen inlet (11), a hydrogen-containing gas inlet (10) and an air inlet (12) which are connected to the static mixer (3) through pipelines respectively. The nitrogen inlet (11) is connected to the static mixer (3) through a pipeline. The pipeline connected between the static mixer (3) and the hydrogen-containing gas inlet (10) extends into the interior of the static mixer (3), and a laminar flow baffle (35) is arranged at the end of the pipe opening. The laminar flow baffle (35) is in an arc shape and can form a negative pressure when the air flow rate is accelerated, thereby preventing air from entering the hydrogen pipeline and causing back mixing. A No. I valve (24) and a No. I hydrogen analyzer (18) are arranged on the pipeline between the air inlet (10) and the static mixer (3), and a No. III valve (26) and a flow meter (16) are arranged on the pipeline between the air inlet (12) and the static mixer (3) according to the air flow direction; a No. V valve (28) is arranged on the pipeline between the fan (4) and the inlet of the hydrogen removal composite device (5), and a No. II hydrogen analyzer (19) is arranged between the fan (4) and the No. V valve (28); the outlet of the condenser (6) is connected to two parallel branch pipelines, and a No. VII valve (30) and a No. X valve (34) are respectively arranged on the branch pipelines, and a No. III hydrogen analyzer (20) is arranged at the outlet of the condenser (6); The hydrogen removal composite device (5) comprises a shell (50) and a heating bed (51), a packed bed (52) and a catalytic bed (53) arranged in the shell (50) from bottom to top, an inlet (55) is arranged at the bottom of the shell (50), and the inlet (55) is communicated with the heating bed (51), an outlet (56) is arranged at the top of the shell (50), and a bursting disc safety pressure relief device (54) is arranged at the top of the shell (50); The heating bed (51) is fixed inside the housing (50) via a flange; The packed bed (52) comprises layer plates and inert ceramic balls filled between the layer plates; The catalytic bed (53) comprises a box body (531) and a catalyst filled in the box body, a handle (532) is arranged on the top of the box body (531), a clamping ring (533) is formed on the bottom, a convex ring (501) is formed on the upper inner wall of the shell (50), a sealing groove matched with the clamping ring (533) is formed on the top surface of the convex ring (501), and high-temperature rock wool (502) is filled between the clamping ring (533) and the sealing groove; The process includes the following steps: (i) Introducing hydrogen-containing gas into the device Before starting the equipment, open valves VIII and IX to introduce cooling water, open valves I and V, adjust valve III to the maximum opening, turn on the fan, and introduce hydrogen-containing gas into the device from the hydrogen-containing gas inlet. Hydrogen analyzer I measures the hydrogen concentration. The system adjusts the opening of valve III according to the hydrogen concentration, and adjusts the hydrogen concentration mixed in the air measured by hydrogen analyzer II to below 2.5 vol.%; (ii) Hydrogen removal treatment After the hydrogen-containing gas passes through the heating bed of the hydrogen removal composite device and is heated to 140-160°C, the gas flows through the catalyst bed for catalytic oxidation. The high-temperature gas after catalysis carries the generated water vapor into the condenser for gas-liquid separation. The separated gas is measured by the No. Ⅲ hydrogen analyzer and discharged into the ventilation system after the concentration reaches the standard. In the above process, if the standard is not met, the gas will be returned to the hydrogen-containing gas inlet for further treatment; if the hydrogen concentration measured by the No. Ⅱ hydrogen analyzer is higher than 3 vol.%, the No. Ⅴ valve will be closed, and the No. Ⅳ valve and the No. X valve will be opened. The gas will not pass through the hydrogen removal composite device, but will be returned to the hydrogen-containing gas inlet for further mixing and dilution; if the hydrogen concentration measured by the No. Ⅱ hydrogen analyzer is always higher than 3 vol.%, the No. Ⅱ valve will be opened to introduce a large amount of compressed nitrogen for forced dilution and purging.

2. The process of the device for dehydrogenation of hydrogen-containing gas according to claim 1, characterized in that: A valve No. II (25) is provided on the pipeline between the nitrogen inlet (11) and the static mixer (3).

3. The process of the device for dehydrogenation of hydrogen-containing gas according to claim 1, characterized in that: A bypass is provided between the fan (4) and the condenser (6), and a No. IV valve (27) is provided on the bypass.

4. The process of the device for dehydrogenation of hydrogen-containing gas according to claim 2, characterized in that: A flame arrester (17) is provided between the No. V valve (28) and the inlet of the hydrogen removal composite device (5); and an air filter (7) is also provided between the air inlet (12) and the No. III valve (26).

5. The process of the device for dehydrogenation of hydrogen-containing gas according to claim 1, characterized in that: The diameter d and height h of the catalyst bed (53) are calculated according to the following formula: ； Wherein, Q is used to characterize the maximum gas flow rate into the hydrogen removal composite device (5), in m 3 / h, S is used to characterize the space velocity of the catalyst used on the catalytic bed, the unit is h -1 .

6. The process of the device for dehydrogenation treatment of hydrogen-containing gas according to claim 1, characterized in that: The following steps are also included: (iii) Shutdown protection processing When the equipment is out of service, close valves No. Ⅰ, No. Ⅲ, and No. Ⅳ, open valve No. Ⅱ, introduce nitrogen for purging, and finally, close all valves to keep the catalyst in a nitrogen-protected state.

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