A test system for verifying the performance of a hydrogen combustion catalyst

Abstract

The application 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 and analysis subsystem, wherein 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, each gas source is communicated with a corresponding connecting pipeline, and at least part of the connecting pipelines can realize the functions of measuring the mass and concentration of the gas in the pipeline, controlling the gas flow and heating the gas in the pipeline; the mixed catalysis subsystem comprises a mixing container and a catalysis device, each connecting pipeline is communicated into the mixing container, each gas is mixed in the mixing container and then communicated into the catalysis device, hydrogen catalytic oxidation reaction is carried out under the action of the catalyst in the catalysis device, and the outlet of the catalysis device is communicated with the processing and analysis subsystem; the processing and analysis subsystem detects the concentrations of hydrogen and oxygen in the reacted gas, so that the performance of the catalyst can be analyzed in combination with the gas concentration measured by the gas supply subsystem.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hydrogen safety technology of nuclear power plants, in particular to a test system for verifying the performance of hydrogen combustion catalyst. BACKGROUND

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

[0003] In the design of a nuclear power plant, a perfect containment hydrogen removal system, especially a hydrogen removal measure under serious accident conditions, is an important aspect to ensure the safety of the reactor. The catalytic oxidation technology of hydrogen is a relatively mild and efficient treatment method, which can be used for hydrogen relief measures in the containment. The key to hydrogen elimination is to rely on the catalyst to induce the recombination 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 power for air flow circulation, so that the air containing H2 forms a convection circulation between the containment and the hydrogen recombiner, and the "passive" requirement of the hydrogen recombiner is realized.

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

[0006] The prior art CN106568887A discloses an experimental device for studying the hydrogen combustion in the containment of a nuclear power plant, which comprises a safety tank, an experimental pipe section, a gas supply system, an exhaust system, a heating and insulation system, a spraying 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 uniformly and then fills the safety tank or the experimental pipe section for combustion experiment, the exhaust system is used for exhausting the exhaust gas in the experimental device, the heating and insulation system can control the initial gas temperature, the spraying system provides a spraying water environment for the experimental device, the data acquisition system is used for acquiring and processing sensor signals to obtain experimental data, and the control system is used for online monitoring and control of each subsystem and equipment of the experimental device. However, the technical solution is used for studying the hydrogen combustion characteristics in the containment of a nuclear power plant, which is different from the purpose of the test of the present application.

[0007] In view of the above technical problems, the present application is proposed. SUMMARY

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

[0009] In order to achieve the above-mentioned purpose, the present application provides a test system for verifying the performance of hydrogen combustion catalyst, which comprises a gas supply subsystem, a mixed catalysis subsystem and a processing and analysis subsystem connected in sequence, 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, each gas source is communicated with the corresponding connecting pipeline, and at least part of the connecting pipelines can realize the functions of measuring the mass and concentration of the gas in the pipeline, controlling the gas flow and heating the gas in the pipeline.

[0010] The mixed catalysis subsystem comprises a mixing container and a catalysis device, each connecting pipeline is connected to the mixing container, and each gas is mixed in the mixing container and then enters the catalysis device, and the hydrogen catalytic oxidation reaction is carried out under the action of the catalyst in the catalysis device, and the outlet of the catalysis device is communicated with the processing and analysis subsystem.

[0011] The processing and analysis subsystem detects the concentrations of hydrogen and oxygen in the reacted gas, so that the performance of the catalyst can be analyzed in combination with the gas concentration measured by the gas supply subsystem.

[0012] Further, the catalysis device comprises an inlet section, a stabilization section, a catalysis test section and an outlet section connected in sequence, the stabilization section can convert the gas flowing into the square tube from the inlet section, the catalysis test section carries out catalytic reaction, and reaction measuring instrument equipment is arranged in the catalysis test section.

[0013] Further, the catalysis test section comprises a catalyst mounting hole, a visual observation window and a measurement lead-out hole.

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

[0015] Further, the inlet section adopts double-side gas inlet, a perforated plate is arranged in the inlet section, and a blind plate type quick sealing plate is arranged at the end of the inlet section.

[0016] Further, the mixed catalysis subsystem further comprises a bypass branch arranged in parallel with the catalysis device, a catalytic bypass valve is arranged on the bypass branch, and the gas in the mixing container can pass through the bypass branch and enter the processing and analysis subsystem.

[0017] Further, the mixed catalysis subsystem further comprises an emptying pipeline, one end of the emptying pipeline is connected to the intersection point of the bypass branch and the outlet of the catalysis device, and an emptying valve is arranged on the emptying pipeline.

[0018] Further, the processing and analyzing subsystem comprises a sampling pipeline, one end of the sampling pipeline is connected to the intersection point of the bypass branch and the outlet of the catalytic device, and a sampling electric shut-off valve is arranged on the sampling pipeline.

[0019] Further, the processing and analyzing subsystem comprises a gas concentration analyzing assembly, the gas concentration analyzing assembly comprises a thermal conductivity type hydrogen concentration analyzer and an electrochemical type oxygen concentration analyzer connected in parallel with each other.

[0020] Further, the processing and analyzing subsystem further comprises a condenser, the condenser is arranged upstream of the gas concentration analyzing assembly, and a humidity sensor is further arranged between the condenser and the gas concentration analyzing assembly.

[0021] Further, a gas mass flow controller is arranged on each of the hydrogen connection pipeline connected with the hydrogen gas source, the nitrogen connection pipeline connected with the nitrogen gas source and the air connection pipeline connected with the air gas source.

[0022] Further, a heating tracing pipe is arranged on each of the nitrogen connection pipeline and the air connection pipeline.

[0023] Further, a filter, an electric shut-off valve and a check valve are arranged on each of the hydrogen connection pipeline, the nitrogen connection pipeline and the air connection pipeline.

[0024] Further, the hydrogen connection pipeline and the nitrogen connection pipeline are communicated through a hydrogen purging pipeline, and a hydrogen purging bypass valve is arranged on the hydrogen purging pipeline.

[0025] Further, a flame arrestor is arranged on the hydrogen connection pipeline, and the flame arrestor is arranged close to the mixing container.

[0026] Further, a peristaltic pump and a steam generator are arranged on the water vapor connection pipeline connected with the water vapor gas source.

[0027] Further, a container internal pressure sensor and a container internal temperature sensor are arranged on the mixing container.

[0028] Further, a catalytic front electric shut-off valve and a catalytic rear electric shut-off valve are arranged at the inlet and the outlet of the catalytic device respectively, and a gas temperature sensor is arranged on the connection pipeline between the mixing container and the catalytic device.

[0029] The technical scheme of the present application at least has the following beneficial effects:

[0030] 1. The experimental system of the present invention is provided by setting up a gas supply subsystem, a mixing and catalytic subsystem, and a processing and analysis subsystem. The gas supply subsystem precisely controls the supply of each gas and calculates the mass and concentration of the gas. The gases are mixed in a mixing container and reach a predetermined temperature and pressure, and then react in the catalytic device. After the reaction, the gas concentration is analyzed in the processing and analysis subsystem, thereby calculating the catalytic efficiency of the catalyst and accurately evaluating the catalytic performance of the catalyst.

[0031] 2. The experimental system of the present invention, through the design of the structure of the catalytic device, enables the catalytic device to further realize functions such as enhancing gas mixing and facilitating the operation of optical instruments during catalytic experiments. The device has a simple structure, is easy to monitor, assemble, disassemble and use, and is more conducive to in-depth research on catalyst performance.

[0032] 3. The experimental system of the present invention, by setting a bypass branch, allows the gas before the catalytic reaction to be introduced into the processing and analysis subsystem through the bypass branch for correction of the inlet gas concentration, providing a more stable gas composition before the reaction, thereby improving the experimental accuracy.

[0033] 4. The test system of the present invention avoids potential risks such as combustion and explosion caused by hydrogen heating and mixing by not installing heating and heat tracing pipes, hydrogen purging pipes, flame arrestors, check valves and other components on the hydrogen connection pipeline, and avoids gas backflow in the pipeline. The system is also designed to prevent system blockage by filtering impurities and particulate matter in the gas source. This makes the test system highly safe. Attached Figure Description

[0034] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

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

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

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

[0038] 1, hydrogen gas source; 2, nitrogen gas source; 3, air gas source; 4, water vapor gas source; 5, hydrogen gas connecting pipeline; 6, nitrogen gas connecting pipeline; 7, air connecting pipeline; 8, water vapor connecting pipeline; 9, mixing container; 10, gas mass flow controller; 11, heating heat 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 type hydrogen concentration analyzer; 16, electrochemical type oxygen concentration analyzer; 17, filter; 18, electric shut-off valve; 19, check valve; 20, hydrogen purge bypass valve; 21, flame arrestor; 22, container pressure sensor; 23, container temperature sensor; 24, gas temperature sensor; 25, pre-catalysis electric shut-off valve; 26, post-catalysis electric shut-off valve; 27, bypass pipeline; 28, catalytic bypass valve; 29, sampling electric shut-off valve; 30, condenser; 31, humidity sensor; 32, evacuation pipeline; 33, evacuation valve; 34, sampling pipeline. DETAILED DESCRIPTION

[0039] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0040] The present application will be further described in detail below with reference to specific embodiments, which cannot be understood as limiting the scope of the present application. The term "comprising" indicates the presence of a feature, but does not exclude the presence or addition of one or more other features; the terms "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; in addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0041] In the description, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0042] Embodiment:

[0043] The application provides a test system for verifying the performance of a hydrogen combustion catalyst. Figure 1 As shown in the figure, the test system comprises a gas supply subsystem, a mixed catalysis subsystem and a processing and analysis subsystem connected in sequence. 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 gas source is communicated with a corresponding connecting pipeline, and at least part of the connecting pipelines can realize the functions of measuring the mass and concentration of the gas in the pipeline, controlling the gas flow and heating the gas in the pipeline.

[0044] The mixed catalysis subsystem comprises a mixing container 9 and a catalysis device 14, each connecting pipeline is communicated into the mixing container 9, each gas is mixed in the mixing container 9 and then communicated into the catalysis device 14, the hydrogen catalytic oxidation reaction is carried out under the action of the catalyst in the catalysis device 14, and the outlet of the catalysis device 14 is communicated with the processing and analysis subsystem. The processing and analysis subsystem detects the concentrations of hydrogen and oxygen in the reacted gas, so that the performance of the catalyst can be analyzed in combination with the gas concentration measured by the gas supply subsystem.

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

[0046] Further, in order to make the multi-component gas under each working condition enter the catalysis device 14 at an expected temperature and avoid the potential danger caused by hydrogen heating, the heating heat tracing pipes 11 are arranged on the nitrogen connecting pipeline 6 and the air connecting pipeline 7. Preferably, the heating heat tracing pipes 11 can adopt modes including but not limited to coil heating, Venturi heating and high-temperature gas heater.

[0047] According to Figure 1 It can be known that each connecting pipeline is communicated into the mixing container 9. The heating heat tracing pipes are arranged on part of the connecting pipelines in advance, and the mixed action of each gas is carried out in the mixing container 9, so that the overall fluid temperature reaches a predetermined value. Preferably, the container-in pressure sensor 22 and the container-in temperature sensor 23 are arranged on the mixing container 9, so that the mixed gas can directly react when entering the catalysis device.

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

[0049] Preferably, a filter 17 and an electrically operated shut-off valve 18 are provided on the hydrogen connection line 5, the nitrogen connection line 6 and the air connection line 7. The gas from each gas source is reduced in pressure and enters the respective connection line. In view of the possibility that the gas source can contain impurities and particles which can cause blockage of the equipment, the filter 17 is provided for filtering. The filtered gas opens and closes the line by means of the electrically operated shut-off valve 18 controlled by the electromagnetic switch valve, achieving the function of instantaneous opening and closing. Further preferably, the gas mass flow controller 10 is provided between the filter 17 and the electrically operated shut-off valve 18.

[0050] Preferably, in order to further avoid backflow of the gas in the line and eliminate the potential danger of combustion and explosion of the hydrogen mixture, a check valve 19 is provided on the hydrogen connection line 5, the nitrogen connection line 6 and the air connection line 7, and a flame arrestor 21 is provided on the hydrogen connection line 5, the flame arrestor 21 being provided close to the mixing vessel 9. The heating trace 11 is provided downstream of the check valve 19.

[0051] Preferably, in some optional embodiments, the hydrogen connection line 5 and the nitrogen connection line 6 are connected by a hydrogen purge line, on which a hydrogen purge bypass valve 20 is provided. In the event of an emergency, the hydrogen connection line 5 is purged using the nitrogen provided in the nitrogen connection line 6.

[0052] Preferably, a peristaltic pump 12 and a steam generator 13 are provided on the water vapor connection line 8 connected to the water vapor source 4. A low-power steam generator 13 is used to provide the 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 gas sources, including but not limited to gas cylinders, gas generators, compressed air, etc.

[0054] As shown in FIG. 1, the hydrogen source 1, the nitrogen source 2, the air source 3 and the water vapor source 4 are connected to the hydrogen connection line 5, the nitrogen connection line 6, the air connection line 7 and the water vapor connection line 8, respectively. Figure 2 As shown in FIG. 1, the hydrogen source 1, the nitrogen source 2, the air source 3 and the water vapor source 4 are connected to the hydrogen connection line 5, the nitrogen connection line 6, the air connection line 7 and the water vapor connection line 8, respectively.

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

[0056] The Raman spectrum gas analyzer is based on the principle of laser Raman scattering. The characteristic Raman scattering spectrum of the gas to be measured is enhanced, collected, processed and identified to quantitatively calculate the gas composition, so as to realize online real-time qualitative and quantitative monitoring of various gases. The infrared thermal imager is a device capable of imaging by using infrared waves. Infrared light waves have strong temperature effects and carry temperature information of the radiation target. Temperature field measurement and research can be carried out by using infrared imaging.

[0057] Preferably, the inlet section 141 adopts double-side air inlet, and the inside of the inlet section 141 is provided with a perforated plate, and the end of the inlet section 141 is provided with a blind plate type quick sealing.

[0058] Preferably, in some embodiments, the end of the outlet section 144 is provided with a waste gas outlet and a bypass pipeline, and the bypass pipeline is connected to the processing and analysis subsystem, so that a part of the outlet gas after the reaction is led out for detection of the concentrations of hydrogen and oxygen.

[0059] The catalytic device can further realize the functions of strengthening gas mixing, observing the catalytic test, facilitating the operation of optical instruments, and the like. The device has simple structure, is convenient for monitoring, disassembly and use, and is more conducive to the in-depth research on the performance of the catalyst.

[0060] Reference Figure 1 As shown, preferably, the inlet and outlet of the catalytic device 14 are respectively provided with a pre-catalysis electric shut-off valve 25 and a post-catalysis electric shut-off valve 26. This is convenient for controlling the start and stop of the catalytic reaction.

[0061] Preferably, in some embodiments, the mixing and catalysis subsystem further comprises a bypass branch 27 arranged in parallel with the catalytic device 14, and the bypass branch 27 is provided with a catalytic bypass valve 28. The gas in the mixing container 9 can be led 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 led into the processing and analysis subsystem through the bypass branch to correct the inlet gas concentration, provide more stable pre-reaction gas components, and thus improve the test accuracy.

[0062] Preferably, the mixing and catalysis subsystem further comprises an emptying pipeline 32, one end of the emptying pipeline 32 is connected to the intersection point of the bypass branch 27 and the outlet of the catalytic device 14, and the emptying pipeline 32 is provided with an emptying valve 33.

[0063] Preferably, the processing and analysis subsystem comprises a sampling pipeline 34, one end of the sampling pipeline 34 is connected to the intersection point of the bypass branch 27 and the outlet of the catalytic device 14, and the sampling pipeline 34 is provided with a sampling electric shut-off valve 29. Further preferably, the emptying pipeline 32 is connected to the waste gas outlet 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 setting the exhaust pipeline 32 and the sampling pipeline 34, the exhaust treatment and sampling detection of the gas after the catalytic reaction can be realized.

[0065] As shown in Figure 1 , the processing and analysis subsystem includes a gas concentration analysis assembly, which includes a thermal conductivity hydrogen concentration analyzer 15 and an electrochemical oxygen concentration analyzer 16 connected in parallel with 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 further includes a condenser 30, which is arranged upstream of the gas concentration analysis assembly, and a humidity sensor 31 is further arranged between the condenser 30 and the gas concentration analysis assembly.

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

[0068] The outlet gas of the thermal conductivity hydrogen concentration analyzer 15 has removed the water vapor, so the total flow is reduced. Therefore, the 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 the reactant is an important index for evaluating the catalytic ability of the catalyst. When the reactants are hydrogen and oxygen, the inlet and outlet concentrations of hydrogen and oxygen need to be measured. The inlet concentration is directly obtained from the reading of the gas mass flow controller 10, and 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] Wherein, η is the catalytic efficiency of the catalyst, C out and C in are the hydrogen concentrations at the outlet and the inlet, respectively.

[0072] Since the concentration displayed in the thermal conductivity hydrogen concentration analyzer 15 is the concentration of the mixed gas after being cooled and dehumidified, the real hydrogen and oxygen concentrations after the catalytic reaction need to be calculated by the humidity and temperature in the thermal conductivity hydrogen concentration analyzer 15.

[0073] The amounts of substance of hydrogen and oxygen at the inlet are and The amount of hydrogen substance reduction after catalysis is X, and the total mass flow rate of the hydrogen concentration analyzer 15 and the electrochemical oxygen concentration analyzer 16 is Y. Two equal parts of hydrogen and one equal part of oxygen generate two equal parts of water.

[0074] 2H2+O2→2H2O

[0075] Then the following two formulas should be established. By combining, the amount of hydrogen substance reduction X and the total mass flow rate Y of the hydrogen concentration analyzer 15 and the electrochemical oxygen concentration analyzer 16 are obtained, so that the real total flow rate and the 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-mentioned embodiments of the present application achieve the following technical effects:

[0078] 1、The test system of the present application is provided with a gas supply subsystem, a mixed catalysis subsystem and a processing and analysis subsystem, the gas supply subsystem accurately controls the supply of each gas and calculates the mass and concentration of the gas, each gas is mixed in a mixing container and reaches a predetermined temperature and pressure, and then reacts in a catalytic device, and after the reaction, the gas concentration is analyzed in the processing and analysis 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 application is designed by the structure of the catalytic device, so that the catalytic device can further realize the functions of strengthening gas mixing, observing the operation of optical instruments during the catalytic test, etc., the device structure is simple, convenient for monitoring, disassembly and use, and more conducive to the in-depth study of the performance of the catalyst.

[0080] 3、The test system of the present application is provided with 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, and provide more stable reaction gas components, thereby improving the test precision.

[0081] 4、The test system of the present application is provided with 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, and provide more stable reaction gas components, thereby improving the test precision.

[0082] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A test system for verifying the performance of a hydrogen combustion catalyst, characterized in that, It includes a gas supply subsystem, a mixing 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 its corresponding connecting pipeline. At least some of the connecting pipelines can realize the functions of measuring the mass and concentration of the gas in the pipeline, controlling the gas flow rate, and heating the gas in the pipeline. The hybrid catalytic subsystem includes a mixing container (9) and a catalytic device (14). Each of the connecting pipes is connected to the mixing container (9). The gases are mixed in the mixing container (9) and then introduced into the catalytic device (14). Under the action of the catalyst in the catalytic device (14), hydrogen catalytic oxidation reaction is carried out. The outlet of the catalytic device (14) is connected to the processing and analysis subsystem. The processing and analysis subsystem detects the concentrations of hydrogen and oxygen in the gas after the reaction, and can then analyze the performance of the catalyst by combining the gas concentrations measured by the gas supply subsystem.

2. The testing system according to claim 1, characterized in that: The catalytic device (14) includes an inlet section (141), a stabilization section (142), a catalytic test section (143), and an outlet section (144) connected in sequence. The stabilization section (142) can convert the gas flowing into the inlet section (141) into a flow along a square tube. The catalytic test section (143) carries out a catalytic reaction and is equipped with reaction measuring instruments.

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

4. The testing 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 provided outside the visualization observation window.

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

6. The testing system according to any one of claims 1-5, characterized in that: The hybrid catalytic subsystem also includes a bypass branch (27) connected in parallel with the catalytic device (14). The bypass branch (27) is equipped with a catalytic bypass valve (28). The gas in the mixing container (9) can be introduced into the processing and analysis subsystem through the bypass branch (27).

7. The testing system according to claim 6, characterized in that: The hybrid catalytic subsystem also includes a venting pipe (32), one end of which is connected to the junction of the bypass branch (27) and the outlet of the catalytic device (14), and a venting valve (33) is provided on the venting pipe (32).

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

9. The testing system according to claim 1, characterized in that: 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.

10. The testing system according to claim 9, characterized in that: The processing and analysis subsystem also includes a condenser (30), which is located upstream of the gas concentration analysis component. A humidity sensor (31) is also provided between the condenser (30) and the gas concentration analysis component.

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

12. The testing system according to claim 11, characterized in that: Both the nitrogen connection pipe (6) and the air connection pipe (7) are equipped with heating and heat tracing pipes (11).

13. The testing system according to claim 11, characterized in that: The hydrogen connection pipeline (5), the nitrogen connection pipeline (6), and the air connection pipeline (7) are all equipped with a filter (17), an electric shut-off valve (18), and a check valve (19).

14. The testing system according to claim 11, characterized in that: The hydrogen connection pipeline (5) and the nitrogen connection pipeline (6) are connected by a hydrogen purging pipeline, and a hydrogen purging bypass valve (20) is provided on the hydrogen purging pipeline.

15. The testing system according to any one of claims 11-14, characterized in that: A flame arrestor valve (21) is provided on the hydrogen connection pipeline (5), and the flame arrestor valve (21) is located near the mixing container (9).

16. The testing system according to claim 1, characterized in that: A peristaltic pump (12) and a steam generator (13) are installed on the steam connection pipe (8) connected to the steam source (4).

17. The testing system according to claim 1, characterized in that: The mixing container (9) is equipped with a container pressure sensor (22) and a container temperature sensor (23).

18. The testing system according to claim 17, characterized in that: The inlet and outlet of the catalytic device (14) are respectively equipped with an electric shut-off valve (25) before catalysis and an electric shut-off valve (26) after catalysis, and a gas temperature sensor (24) is installed on the connecting pipeline between the mixing container (9) and the catalytic device (14).

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