Test system for verifying performance of hydrogen combustion catalyst

Abstract

The invention discloses a test system for verifying the performance of a hydrogen combustion catalyst, which comprises a gas supply subsystem, a mixed catalysis subsystem and a processing analysis subsystem, and is characterized in that the gas supply subsystem comprises a hydrogen gas source, a nitrogen gas source, an air gas source, a water vapor gas source and connecting pipelines, and each gas source is respectively communicated with the corresponding connecting pipeline; at least part of the connecting pipelines can realize the functions of measuring the mass and concentration of gas in the pipelines, controlling the gas flow and heating the gas in the pipelines; the mixed catalysis subsystem comprises a mixing container and a catalysis device, each connecting pipeline is introduced into the mixing container, each path of gas is introduced into the catalysis device after being mixed in the mixing container, a hydrogen catalytic oxidation reaction is carried out under the action of a catalyst in the catalysis device, and an outlet of the catalysis device is communicated with the treatment analysis subsystem; the treatment and analysis subsystem is used for detecting the concentration of hydrogen and oxygen in the reacted gas, so that the performance of the catalyst can be analyzed by combining the gas concentration measured by the gas supply subsystem.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen safety in nuclear power plants, and in particular to a test system for verifying the performance of a hydrogen combustion catalyst. Background Art

[0002] When a serious accident occurs in a nuclear power plant, a large amount of hydrogen will be produced. The accumulation of a large amount of hydrogen in the containment will greatly affect the safety of the nuclear power plant. The combustion and explosion of hydrogen is one of the main causes of containment failure of nuclear power plants and damage to property and the environment.

[0003] In the design of nuclear power plants, setting up a complete containment hydrogen removal system, especially hydrogen removal measures in the event of a serious accident, is an important aspect of ensuring reactor safety. Hydrogen catalytic oxidation technology is a relatively gentle and efficient treatment method that can be used for hydrogen mitigation measures in the containment. The key to hydrogen removal is to rely on catalysts to induce a composite reaction of hydrogen and oxygen. The catalytic oxidation reaction formula of hydrogen is: H2+0.5O2→H2O↑+240KJ / mol

[0004] The heat released by the reaction and the "chimney effect" formed by the device are used as the driving force for the air flow circulation, so that the H2-containing air forms a convection circulation between the containment and the hydrogen recombiner, realizing the "passive" requirement of the hydrogen recombiner.

[0005] The most important parameter of the hydrogen recombiner is its hydrogen removal efficiency in the containment environment. However, due to the complex working conditions in the containment of nuclear power plants, especially in the event of an accident, mixed gases containing many components will appear, and these parameters may affect the hydrogen removal efficiency of the hydrogen recombiner. Therefore, there is an urgent need for an experimental device to verify the performance of hydrogen combustion catalysts.

[0006] Prior art CN106568887A discloses an experimental device for studying hydrogen combustion in a nuclear power plant containment, including a safety tank, an experimental pipe section, a gas supply system, an exhaust system, a heating and insulation system, a spray system, a data acquisition system, a control system, an igniter and a high-speed camera. The gas supply system pre-mixes hydrogen, air and water vapor and then fills them into a safety tank or an experimental pipe section for a combustion experiment. The exhaust system is used to discharge the exhaust gas in the experimental device. The heating and insulation system can control the initial gas temperature. The spray system provides a spray water environment for the experimental device. The data acquisition system is used to collect and process sensor signals to obtain experimental data, and the control system is used to monitor and control the various subsystems and equipment of the experimental device online. However, this technical solution is used to study the combustion characteristics of hydrogen in the containment of a nuclear power plant, which is different from the experimental purpose of this application.

[0007] In view of the above technical problems, the present invention is specially introduced. Summary of the invention

[0008] The main purpose of the present invention is to provide a test system for verifying the performance of a hydrogen combustion catalyst.

[0009] In order to achieve the above-mentioned purpose, the present invention proposes a test system for verifying the performance of a hydrogen combustion catalyst, comprising a gas supply subsystem, a mixed catalytic subsystem and a processing and analysis subsystem connected in sequence, wherein the gas supply subsystem comprises a hydrogen gas source, a nitrogen gas source, an air gas source, a water vapor gas source and a connecting pipeline, each gas source is respectively connected to a corresponding connecting pipeline, and at least part of the connecting pipeline can realize the functions of measuring the quality and concentration of the gas in the pipeline, controlling the gas flow rate, and heating the gas in the pipeline;

[0010] The mixed catalytic subsystem includes a mixing container and a catalytic device. Each connecting pipeline leads to the mixing container. After the gases from each path are mixed in the mixing container, they are led to the catalytic device. Under the action of the catalyst in the catalytic device, a hydrogen catalytic oxidation reaction is performed. The outlet of the catalytic device is connected to the processing and analysis subsystem.

[0011] The processing and analyzing subsystem detects the concentrations of hydrogen and oxygen in the gas after the reaction, so as to analyze the performance of the catalyst in combination with the gas concentration measured by the gas supply subsystem.

[0012] Furthermore, the catalytic device includes an inlet section, a stable section, a catalytic test section and an outlet section which are connected in sequence. The stable section can convert the gas flowing into the inlet section into a flow along the square tube. A catalytic reaction is carried out in the catalytic test section, and reaction measuring instruments and equipment are provided.

[0013] Furthermore, the catalytic test section includes a catalyst installation hole, a visual observation window and a measurement lead-out hole.

[0014] Furthermore, an infrared camera for measuring the temperature distribution on the catalyst surface and a Raman analyzer for measuring the gas concentration distribution around the catalyst are provided outside the visual observation window.

[0015] Furthermore, the inlet section adopts double-sided air intake, a perforated plate is provided inside the inlet section, and a blind plate type quick-install seal is provided at the end of the inlet section.

[0016] Furthermore, the mixed catalytic subsystem also includes a bypass branch arranged in parallel with the catalytic device, and a catalytic bypass valve is provided on the bypass branch. The gas in the mixing container can be introduced into the processing and analysis subsystem through the bypass branch.

[0017] Furthermore, the mixed catalytic subsystem also includes an exhaust pipeline, one end of which is connected to the intersection of the bypass branch and the outlet of the catalytic device, and an exhaust valve is provided on the exhaust pipeline.

[0018] Furthermore, the processing and analysis subsystem includes a sampling pipeline, one end of which is connected to the intersection of the bypass branch and the outlet of the catalytic device, and a sampling electric shut-off valve is provided on the sampling pipeline.

[0019] Furthermore, the processing and analysis subsystem includes a gas concentration analysis component, and the gas concentration analysis component includes a thermal conductivity hydrogen concentration analyzer and an electrochemical oxygen concentration analyzer connected in parallel to each other.

[0020] Furthermore, the processing and analysis subsystem also includes a condenser, which is arranged upstream of the gas concentration analysis component, and a humidity sensor is also arranged between the condenser and the gas concentration analysis component.

[0021] Furthermore, a gas mass flow controller is provided on the hydrogen connecting pipeline connected to the hydrogen gas source, the nitrogen connecting pipeline connected to the nitrogen gas source, and the air connecting pipeline connected to the air gas source.

[0022] Furthermore, heating tracing pipes are provided on the nitrogen connecting pipeline and the air connecting pipeline.

[0023] Furthermore, the hydrogen connecting pipeline, the nitrogen connecting pipeline and the air connecting pipeline are all provided with filters, electric stop valves and check valves.

[0024] Furthermore, the hydrogen connecting pipeline and the nitrogen connecting pipeline are connected through a hydrogen purge pipeline, and a hydrogen purge bypass valve is arranged on the hydrogen purge pipeline.

[0025] Furthermore, a flame arrester is provided on the hydrogen connecting pipeline, and the flame arrester is arranged near the mixing container.

[0026] Furthermore, a peristaltic pump and a steam generator are arranged on the water vapor connecting pipeline connected to the water vapor gas source.

[0027] Furthermore, the mixing container is provided with an internal pressure sensor and an internal temperature sensor.

[0028] Furthermore, a pre-catalytic electric stop valve and a post-catalytic electric stop valve are respectively provided at the inlet and outlet of the catalytic device, and a gas temperature sensor is provided on the connecting pipeline between the mixing container and the catalytic device.

[0029] By applying the technical solution of the present invention, at least the following beneficial effects are achieved:

[0030] 1. The test system of the present invention is provided with a gas supply subsystem, a mixing catalytic subsystem and a processing and analyzing subsystem. The gas supply subsystem accurately controls the supply of various gases and measures the quality and concentration of the gases. The various gases are mixed in a mixing container and reach a predetermined temperature and pressure, and react in a catalytic device. After the reaction, the gas concentration is analyzed in the processing and analyzing subsystem, so that the catalytic efficiency of the catalyst can be calculated and the catalytic performance of the catalyst can be accurately evaluated.

[0031] 2. The test system of the present invention designs the structure of the catalytic device so that the catalytic device can further realize functions such as enhancing gas mixing and facilitating the operation of optical instruments when observing catalytic tests. The device has a simple structure and is easy to monitor, assemble and disassemble, and use, which is more conducive to in-depth research on catalyst performance.

[0032] 3. The test system of the present invention sets a bypass branch so that the gas before the catalytic reaction can also be introduced into the processing and analysis subsystem through the bypass branch to correct the inlet gas concentration, provide a more stable pre-reaction gas composition, and thus improve the test accuracy.

[0033] 4. The test system of the present invention avoids the potential risks of combustion and explosion caused by hydrogen heating and hydrogen mixing by not setting a heating tracing pipe on the hydrogen connecting pipeline, setting a hydrogen purge pipeline and flame arrester, check valve and other components, and avoids pipeline gas backflow. By setting a filter to filter impurities and particulate matter in the gas source, system blockage is prevented, making the test system safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0035] Figure 1 The schematic diagram of the test system layout of the present application is shown;

[0036] Figure 2 A schematic diagram of the catalytic device of the present application is shown.

[0037] The above drawings include the following reference numerals:

[0038] 1. Hydrogen source; 2. Nitrogen source; 3. Air source; 4. Steam source; 5. Hydrogen connecting pipeline; 6. Nitrogen connecting pipeline; 7. Air connecting pipeline; 8. Steam connecting pipeline; 9. Mixing container; 10. Gas mass flow controller; 11. Heating tracing pipe; 12. Peristaltic pump; 13. Steam generator; 14. Catalytic device; 141. Inlet section; 142. Stabilization section; 143. Catalytic test section; 144. Outlet section; 15. Thermal conductivity hydrogen concentration analyzer; 16. Electrochemical Oxygen concentration analyzer; 17. Filter; 18. Electric stop valve; 19. Check valve; 20. Hydrogen purge bypass valve; 21. Flame arrester; 22. Container pressure sensor; 23. Container temperature sensor; 24. Gas temperature sensor; 25. Electric stop valve before catalysis; 26. Electric stop valve after catalysis; 27. Bypass line; 28. Catalytic bypass valve; 29. ​​Sampling electric stop valve; 30. Condenser; 31. Humidity sensor; 32. Drain line; 33. Drain valve; 34. Sampling line. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] The present invention is further described in detail below in conjunction with specific embodiments, and these embodiments cannot be understood as limiting the scope of protection claimed by the present invention. The term "including" when used indicates the existence of a feature, but does not exclude the existence or addition of one or more other features; the orientation or position relationship indicated by the terms "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply 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 a limitation on the present invention; in addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0041] In the description, 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 directly connected, or 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 according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0042] Example:

[0043] The present invention proposes a test system for verifying the performance of hydrogen combustion catalysts, such as Figure 1 As shown, the test system includes a gas supply subsystem, a mixed catalytic subsystem and a processing and analysis subsystem connected in sequence. The gas supply subsystem includes a hydrogen gas source 1, a nitrogen gas source 2, an air gas source 3, a water vapor gas source 4 and connecting pipelines, each gas source is connected to a corresponding connecting pipeline, and at least part of the connecting pipeline can realize the functions of measuring the quality and concentration of the gas in the pipeline, controlling the gas flow, and heating the gas in the pipeline.

[0044] The mixed catalytic subsystem includes a mixing container 9 and a catalytic device 14. Each connecting pipeline leads to the mixing container 9. After the gases of each route are mixed in the mixing container 9, they are led to the catalytic device 14. Under the action of the catalyst in the catalytic device 14, a hydrogen catalytic oxidation reaction is performed. The outlet of the catalytic device 14 is connected to the processing and analysis subsystem. The processing and analysis subsystem detects the concentration of hydrogen and oxygen in the gas after the reaction, so that the performance of the catalyst can be analyzed in combination with the gas concentration measured by the gas supply subsystem.

[0045] Specifically, a gas mass flow controller 10 is provided on the hydrogen connecting pipeline 5 connected to the hydrogen source 1, the nitrogen connecting pipeline 6 connected to the nitrogen source 2, and the air connecting pipeline 7 connected to the air source 3. The high-precision gas mass flow controller 10 can accurately control a single connecting pipeline and measure the mass and concentration of the gas in the connecting pipeline.

[0046] Furthermore, in order to make the multi-component gas under each working condition enter the catalytic device 14 at the expected temperature and avoid the potential danger caused by hydrogen heating, a heating tracing pipe 11 is provided on the nitrogen connecting pipe 6 and the air connecting pipe 7. Preferably, the heating tracing pipe 11 can be heated by means including but not limited to coil heating, venturi heating, high temperature gas heater, etc.

[0047] according to Figure 1 It can be seen that the various connecting pipelines are connected and then introduced into the mixing container 9. By setting a heating tracing pipe on some connecting pipelines in advance and mixing the gases in the mixing container 9, the overall fluid temperature reaches a predetermined value. Preferably, the mixing container 9 is provided with an in-container pressure sensor 22 and an in-container temperature sensor 23 so that the mixed gas can directly react after entering the catalytic device.

[0048] Preferably, a gas temperature sensor 24 is provided on the connecting pipeline between the mixing container 9 and the catalytic device 14 to monitor the temperature of the mixed gas before entering the catalytic device 14 .

[0049] Preferably, a filter 17 and an electric stop valve 18 are provided on the hydrogen connecting pipeline 5, the nitrogen connecting pipeline 6 and the air connecting pipeline 7. The gas from each gas source enters each connecting pipeline after being decompressed. Considering that the gas source may contain impurities and particulate matter that may cause clogging of the equipment, a filter 17 is provided for filtering. The filtered gas controls the opening and closing pipeline of the electric stop valve 18 through an electromagnetic switch valve to achieve an instant opening and closing function. Further preferably, the gas mass flow controller 10 is arranged between the filter 17 and the electric stop valve 18.

[0050] Preferably, in order to further avoid gas backflow in the pipeline and eliminate potential dangers such as combustion and explosion after hydrogen mixing, a check valve 19 is provided on the hydrogen connecting pipeline 5, the nitrogen connecting pipeline 6 and the air connecting pipeline 7, and a flame arrester 21 is provided on the hydrogen connecting pipeline 5, and the flame arrester 21 is provided near the mixing container 9. The heating tracer 11 is provided at the downstream position of the check valve 19.

[0051] Preferably, in some optional embodiments, the hydrogen connecting pipeline 5 and the nitrogen connecting pipeline 6 are connected via a hydrogen purge pipeline, and a hydrogen purge bypass valve 20 is provided on the hydrogen purge pipeline. In an emergency, the hydrogen connecting pipeline 5 can be purged with nitrogen provided in the nitrogen connecting pipeline 6.

[0052] Preferably, a peristaltic pump 12 and a steam generator 13 are provided on the water vapor connection pipeline 8 connected to the water vapor source 4. A low-power steam generator 13 is used to provide steam required for the test, and the steam output is adjusted by controlling the water supply flow of the peristaltic pump 12.

[0053] Preferably, the above-mentioned hydrogen gas source 1, nitrogen gas source 2, air gas source 3, water vapor gas source 4 and other gas sources include but are not limited to gas cylinders, gas generators, compressed air and other forms.

[0054] like Figure 2 As shown, the catalytic device 14 includes an inlet section 141, a stable section 142, a catalytic test section 143 and an outlet section 144 which are connected in sequence. The stable section 142 can convert the gas flowing into the inlet section 141 into a flow along the square tube, so that the optical instrument can be better operated when observing the catalytic reaction. The catalytic reaction is carried out in the catalytic test section 143, and reaction measurement instruments and equipment are provided.

[0055] Preferably, the catalytic test section 143 includes a catalyst installation hole, a visual observation window and a measurement lead-out hole. Further preferably, an infrared camera for measuring the catalyst surface temperature distribution and a Raman analyzer for measuring the gas concentration distribution around the catalyst are provided outside the visual observation window.

[0056] The Raman spectrum gas analyzer is based on the principle of laser Raman scattering. By enhancing, collecting, processing and identifying the characteristic Raman scattering spectrum of the gas to be tested, it can quantitatively calculate the gas composition and realize online real-time qualitative and quantitative monitoring of multiple types of gases. The infrared thermal imager is a device that can use infrared waves for imaging. Infrared light waves have a strong temperature effect and carry the temperature information of the radiated target. Infrared imaging can be used as the basis for temperature field measurement research.

[0057] Preferably, the inlet section 141 adopts double-sided air intake, a perforated plate is provided inside the inlet section 141 , and a blind plate type quick-install seal is provided at the end of the inlet section 141 .

[0058] Preferably, in some embodiments, an exhaust port and a bypass pipe are provided at the end of the outlet section 144, and the bypass pipe is connected to a processing and analysis subsystem so that a portion of the outlet gas is drawn out after the reaction for hydrogen and oxygen concentration detection.

[0059] The catalytic device can further realize functions such as enhancing gas mixing and facilitating the operation of optical instruments when observing catalytic tests. The device has a simple structure and is easy to monitor, assemble and disassemble, and use, which is more conducive to in-depth research on catalyst performance.

[0060] refer to Figure 1 As shown, preferably, a pre-catalytic electric stop valve 25 and a post-catalytic electric stop valve 26 are respectively provided at the inlet and outlet of the catalytic device 14, so as to control the start and stop of the catalytic reaction.

[0061] Preferably, in some embodiments, the mixed catalytic subsystem further includes a bypass branch 27 arranged in parallel with the catalytic device 14, and a catalytic bypass valve 28 is provided on the bypass branch 27, and the gas in the mixing container 9 can be introduced into the processing and analysis subsystem through the bypass branch 27. Although the gas concentration before the reaction can be displayed by the gas mass flow controller 10 and obtained by calculation, the gas before the catalytic reaction can also be introduced into the processing and analysis subsystem through the bypass branch to correct the inlet gas concentration, provide a more stable gas component before the reaction, and thus improve the test accuracy.

[0062] Preferably, the mixed catalytic subsystem further includes an exhaust pipe 32 , one end of which is connected to the intersection of the bypass branch 27 and the outlet of the catalytic device 14 , and an exhaust valve 33 is provided on the exhaust pipe 32 .

[0063] Preferably, the processing and analysis subsystem includes a sampling pipeline 34, one end of which is connected to the intersection of the bypass branch 27 and the outlet of the catalytic device 14, and a sampling electric shut-off valve 29 is provided on the sampling pipeline 34. Further preferably, the exhaust pipeline 32 is connected to the exhaust port at the end of the outlet section 144 of the catalytic device, and the sampling pipeline 34 is connected to the bypass pipeline at the end of the outlet section.

[0064] By providing the exhaust pipeline 32 and the sampling pipeline 34, the exhaust processing and sampling detection of the gas after the catalytic reaction can be realized.

[0065] like Figure 1 As shown, the processing and analysis subsystem includes a gas concentration analysis component, which includes a thermal conductivity hydrogen concentration analyzer 15 and an electrochemical oxygen concentration analyzer 16 connected in parallel to each other.

[0066] The thermal conductivity hydrogen concentration analyzer 15 cannot work in a high humidity working environment. However, the mixed gas itself and the hydrogen catalytic reaction itself will produce water vapor. Therefore, the processing and analysis subsystem also includes a condenser 30, which is arranged upstream of the gas concentration analysis component, and a humidity sensor 31 is also arranged between the condenser 30 and the gas concentration analysis component.

[0067] In this way, the thermal conductivity hydrogen concentration analyzer 15 can detect the hydrogen concentration efficiently and for a long time.

[0068] The outlet gas entering the thermal conductivity hydrogen concentration analyzer 15 has already been freed of water vapor, so the total flow rate is reduced. Therefore, an electrochemical oxygen concentration analyzer 16 is added to reduce the hydrogen concentration after the catalytic reaction by calculation and analysis.

[0069] The consumption degree of reactants is an important indicator for evaluating the catalytic ability of catalysts. When the reactants are hydrogen and oxygen, it is necessary to measure the inlet and outlet concentrations of hydrogen and oxygen. The inlet concentration is directly obtained from the indication of the gas mass flow controller 10, while the outlet concentration is displayed on the thermal conductivity hydrogen concentration analyzer 15 and the electrochemical oxygen concentration analyzer 16. The catalytic efficiency of the catalyst can be obtained by the following formula:

[0070]

[0071] Where η is the catalytic efficiency of the catalyst, C out and C in are the hydrogen concentrations at the outlet and inlet, respectively.

[0072] Since the concentration displayed in the thermal conductivity hydrogen concentration analyzer 15 is the concentration of the mixed gas after cooling and dehumidification, it is necessary to calculate the actual hydrogen and oxygen concentrations after the catalytic reaction through the humidity and temperature in the thermal conductivity hydrogen concentration analyzer 15.

[0073] The amounts of hydrogen and oxygen at the inlet are and The amount of hydrogen reduced after catalysis is X, and the total amount of flow entering the thermal conductivity hydrogen concentration analyzer 15 and the electrochemical oxygen concentration analyzer 16 is Y. From the following formula, it can be seen that two equal parts of hydrogen and one equal part of oxygen generate two equal parts of water.

[0074] 2H2+O2→2H2O

[0075] The following two equations should be established. The reduction amount X of hydrogen substance and the total substance flow Y entering the thermal conductivity hydrogen concentration analyzer 15 and the electrochemical oxygen concentration analyzer 16 can be obtained together, so the actual total flow and hydrogen concentration after the catalytic reaction can also be obtained.

[0076]

[0077] In summary, from the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0078] 1. The test system of the present invention is provided with a gas supply subsystem, a mixing catalytic subsystem and a processing and analyzing subsystem. The gas supply subsystem accurately controls the supply of various gases and measures the quality and concentration of the gases. The various gases are mixed in a mixing container and reach a predetermined temperature and pressure, and react in a catalytic device. After the reaction, the gas concentration is analyzed in the processing and analyzing subsystem, so that the catalytic efficiency of the catalyst can be calculated and the catalytic performance of the catalyst can be accurately evaluated.

[0079] 2. The test system of the present invention designs the structure of the catalytic device so that the catalytic device can further realize functions such as enhancing gas mixing and facilitating the operation of optical instruments when observing catalytic tests. The device has a simple structure and is easy to monitor, assemble and disassemble, and use, which is more conducive to in-depth research on catalyst performance.

[0080] 3. The test system of the present invention sets a bypass branch so that the gas before the catalytic reaction can also be introduced into the processing and analysis subsystem through the bypass branch to correct the inlet gas concentration, provide a more stable pre-reaction gas composition, and thus improve the test accuracy.

[0081] 4. The test system of the present invention avoids the potential risks of combustion and explosion caused by hydrogen heating and hydrogen mixing by not setting a heating tracing pipe on the hydrogen connecting pipeline, setting a hydrogen purge pipeline and flame arrester, check valve and other components, and avoids pipeline gas backflow. By setting a filter to filter impurities and particulate matter in the gas source, system blockage is prevented, making the test system safer.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test system for verifying the performance of a hydrogen combustion catalyst, characterized in that: The invention comprises a gas supply subsystem, a mixing catalytic subsystem and a processing and analysis subsystem which are connected in sequence, wherein the gas supply subsystem comprises a hydrogen gas source (1), a nitrogen gas source (2), an air gas source (3), a water vapor gas source (4) and connecting pipelines, each of the gas sources is connected to a corresponding connecting pipeline, and at least part of the connecting pipelines can realize the functions of measuring the quality and concentration of the gas in the pipeline, controlling the gas flow rate and heating the gas in the pipeline; The mixed catalytic subsystem comprises a mixing container (9) and a catalytic device (14), each of the connecting pipelines leads to the mixing container (9), each gas is mixed in the mixing container (9) and then leads to the catalytic device (14), a hydrogen catalytic oxidation reaction is carried out under the action of the catalyst in the catalytic device (14), and the outlet of the catalytic device (14) is connected to the processing and analysis subsystem; The processing and analyzing subsystem detects the concentrations of hydrogen and oxygen in the gas after the reaction, so that the performance of the catalyst can be analyzed in combination with the gas concentration measured by the gas supply subsystem.

2. The test system according to claim 1, characterized in that: The catalytic device (14) comprises an inlet section (141), a stabilization section (142), a catalytic test section (143) and an outlet section (144) which are connected in sequence. The stabilization section (142) can convert the gas flowing into the inlet section (141) into a gas flowing along a square tube. A catalytic reaction is carried out in the catalytic test section (143), and reaction measurement instruments are provided.

3. The test system according to claim 2, characterized in that: The catalytic test section (143) comprises a catalyst installation hole, a visual observation window and a measurement lead-out hole.

4. The test system according to claim 3, characterized in that: An infrared camera for measuring the temperature distribution on the catalyst surface and a Raman analyzer for measuring the gas concentration distribution around the catalyst are arranged outside the visual observation window.

5. The test system according to claim 2, characterized in that: The inlet section (141) adopts double-sided air intake, a perforated plate is provided inside the inlet section (141), and a blind plate-type quick-install seal is provided at the end of the inlet section (141).

6. The test system according to any one of claims 1 to 5, characterized in that: The mixed catalytic subsystem also includes a bypass branch (27) arranged in parallel with the catalytic device (14), and a catalytic bypass valve (28) is provided on the bypass branch (27). The gas in the mixing container (9) can be passed into the processing and analysis subsystem through the bypass branch (27).

7. The test system according to claim 6, characterized in that: The mixed catalytic subsystem further comprises an exhaust pipeline (32), one end of which is connected to the intersection of the bypass branch (27) and the outlet of the catalytic device (14), and an exhaust valve (33) is provided on the exhaust pipeline (32).

8. The test system according to claim 7, characterized in that: The processing and analysis subsystem comprises a sampling pipeline (34), one end of which is connected to the intersection of the bypass branch (27) and the outlet of the catalytic device (14), and a sampling electric shut-off valve (29) is provided on the sampling pipeline (34).

9. The test system according to claim 1, characterized in that: The processing and analysis subsystem comprises a gas concentration analysis component, wherein the gas concentration analysis component comprises a thermal conductivity hydrogen concentration analyzer (15) and an electrochemical oxygen concentration analyzer (16) connected in parallel to each other.

10. The test system according to claim 9, characterized in that: The processing and analysis subsystem further comprises a condenser (30), wherein the condenser (30) is arranged upstream of the gas concentration analysis component, and a humidity sensor (31) is also arranged between the condenser (30) and the gas concentration analysis component.

11. The test system according to claim 1, characterized in that: A gas mass flow controller (10) is provided on the hydrogen connecting pipeline (5) connected to the hydrogen source (1), the nitrogen connecting pipeline (6) connected to the nitrogen source (2), and the air connecting pipeline (7) connected to the air source (3).

12. The test system according to claim 11, characterized in that: The nitrogen connecting pipeline (6) and the air connecting pipeline (7) are both provided with a heating tracing pipe (11).

13. The test system according to claim 11, characterized in that: The hydrogen connecting pipeline (5), the nitrogen connecting pipeline (6) and the air connecting pipeline (7) are all provided with a filter (17), an electric stop valve (18) and a check valve (19).

14. The test system according to claim 11, characterized in that: The hydrogen connecting pipeline (5) and the nitrogen connecting pipeline (6) are connected via a hydrogen purge pipeline, and a hydrogen purge bypass valve (20) is provided on the hydrogen purge pipeline.

15. The test system according to any one of claims 11 to 14, characterized in that: The hydrogen connecting pipeline (5) is provided with a flame arrester (21), and the flame arrester (21) is arranged at a position close to the mixing container (9).

16. The test system according to claim 1, characterized in that: A peristaltic pump (12) and a steam generator (13) are provided on a water vapor connection pipeline (8) connected to the water vapor gas source (4).

17. The test system according to claim 1, characterized in that: The mixing container (9) is provided with an in-container pressure sensor (22) and an in-container temperature sensor (23).

18. The test system according to claim 17, characterized in that: A pre-catalytic electric stop valve (25) and a post-catalytic electric stop valve (26) are respectively provided at the inlet and outlet of the catalytic device (14), and a gas temperature sensor (24) is provided on the connecting pipeline between the mixing container (9) and the catalytic device (14).

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