Catalytic combustion testing device and testing method for SOFC (solid oxide fuel cell)

Abstract

The invention provides a catalytic combustion testing device and a catalytic combustion testing method for an SOFC (Solid Oxide Fuel Cell), and belongs to the field of solid oxide fuel cells. Comprising a fan, a heat exchanger, a mixing pipeline, a combustor, a heating device and an observation device. Wherein the outlet end of the fan is connected with a cold stream inlet of the heat exchanger, a cold stream outlet of the heat exchanger is connected with one end of the combustor through the mixing pipeline, the mixing pipeline is provided with a gas connecting pipe, a catalyst carrier is arranged in the combustor, and the other end of the combustor is connected with a hot stream inlet of the heat exchanger. A carrier temperature sensor connected with the catalyst carrier is arranged on the combustor, the heating device is connected with the combustor, pressure sensors and temperature sensors are arranged at the two ends of the combustor, and the observation device is connected with an inner cavity of the combustor. The actual working conditions of combustors in SOFC systems of different specifications can be simply and quickly simulated, and the performance verification test of the catalyst is realized.

Description

Technical Field

[0001] The invention relates to the field of solid oxide fuel cells, and in particular to a catalytic combustion testing device and a testing method for SOFC. Background Art

[0002] Solid Oxide Fuel Cell (SOFC) is a device that converts chemical energy in fuel directly into electrical energy. It has the advantages of strong fuel adaptability, high energy density, no pollution, and low noise. Its working principle is that air is input by a blower, and enters the cathode of the fuel cell after heat exchange through the SOFC catalytic combustion test device. The fuel or other alkane gas in the gas cylinder is reformed into hydrogen and enters the anode. Electrochemical reactions are carried out inside the stack to generate electricity. The remaining unreacted fuel enters the combustion chamber for combustion, and the waste heat generated is used to preheat the system intake air.

[0003] In the related art, the SOFC combustion chamber uses a flame combustion method to process the anode tail gas, but the ignition temperature is high and the complete oxidation is not thorough enough. Therefore, it is necessary to introduce a catalyst to reduce the ignition temperature of the gas and improve the combustion efficiency. However, in order to verify the performance of the catalyst, the process of directly running the test through the SOFC system is complicated and the power consumption is high. In addition, the SOFC system has different parameters such as the type of gas used in its operation and the intake flow rate of gas and air under different working conditions, which leads to high limitations of the test results and limited reference value. Summary of the invention

[0004] The embodiment of the present invention provides a catalytic combustion test device and test method for SOFC, which can simply and quickly simulate the actual working conditions of the burner in the SOFC system under different working conditions and realize the performance verification test of the catalyst. The technical solution is as follows:

[0005] In a first aspect, an embodiment of the present invention provides a catalytic combustion test device for SOFC, comprising: a fan, a heat exchanger, a mixing pipe, a burner, a heating device and an observation device.

[0006] The inlet end of the fan is used to connect with the outside air, the outlet end of the fan is connected to the cold flow inlet of the heat exchanger, the cold flow outlet of the heat exchanger is connected to one end of the burner through the mixing pipe, the mixing pipe is provided with a gas connecting pipe for connecting to the gas supply end, a catalyst carrier is provided in the burner, the other end of the burner is connected to the hot flow inlet of the heat exchanger, a carrier temperature sensor connected to the catalyst carrier is provided on the burner, the heating device is connected to the burner, pressure sensors and temperature sensors are provided at both ends of the burner, and the observation device is connected to the inner cavity of the burner.

[0007] Optionally, the catalyst carrier is detachably connected to the inner cavity of the burner.

[0008] Optionally, a tail gas proportional valve is provided at the hot flow outlet of the heat exchanger.

[0009] Optionally, it also includes an exhaust gas collection bag and a bypass proportional valve, the inlet of the bypass proportional valve is connected to the pipeline between the other end of the burner and the hot flow inlet of the heat exchanger, and the outlet of the bypass proportional valve is connected to the exhaust gas collection bag.

[0010] Optionally, an ejector is provided at the connection between the gas connecting pipe and the mixing pipe.

[0011] Optionally, an outlet temperature sensor is provided between the cold stream outlet of the heat exchanger and the ejector.

[0012] Optionally, the heating device includes an adjustable power supply and a first heating wire, the adjustable power supply is electrically connected to the first heating wire, and the first heating wire is wound around the outer side wall of the burner.

[0013] Optionally, it further includes a second heating wire, which is wound around the heat exchanger and electrically connected to the adjustable power supply.

[0014] Optionally, the heat exchanger is a shell and tube heat exchanger.

[0015] In a second aspect, an embodiment of the present invention provides a testing method, which is implemented based on the catalytic combustion testing device for SOFC described in the first aspect, and the method comprises:

[0016] Coating the catalyst to be tested on the catalyst carrier, and connecting and installing the catalytic combustion test device for SOFC;

[0017] Starting the blower to provide air intake, using the heating device to preheat the burner, and using the carrier temperature sensor and the temperature sensor disposed at the other end of the burner to confirm the temperature of the catalyst carrier;

[0018] When the carrier temperature approaches the ignition temperature of the gas to be introduced, the heating device is turned off, and the gas is introduced into the mixing pipe through the gas supply end;

[0019] The pressure sensor and the temperature sensor are used for sensing, and the carrier temperature, the front end pressure and the front end temperature of one end of the burner, and the rear end pressure and the rear end temperature of the other end of the burner are recorded in real time by a host computer. At the same time, the working condition of the catalyst carrier is checked through the observation device, and the ignition temperature is confirmed based on the curve of the rear end temperature change over time and the working condition of the catalyst carrier.

[0020] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least:

[0021] The catalytic combustion test device for SOFC provided by the embodiment of the present invention is used to simplify and simulate part of the structure of the SOFC system, select parts related to the burner structure separately, and connect them independently through pipelines, and set corresponding sensors and other detection equipment at relevant positions to form the catalytic combustion test device for SOFC, so as to simulate the actual operating conditions of the burner in the SOFC system, so as to verify the performance of the catalyst in the burner in a targeted manner. Its assembly and setting are simple, and the catalyst to be tested can be set in the burner through the catalyst carrier according to different test requirements, and external air and fuel gas can be introduced for combustion test. At the same time, the high-temperature exhaust gas from the rear end of the burner can be introduced into the hot stream side of the heat exchanger, and the air introduced from the cold stream side through the fan can be regulated by the intake temperature, which can simply and quickly simulate the actual working conditions of the burner in the SOFC system under different working conditions, and realize the performance verification test of the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of a catalytic combustion test device for SOFC provided in an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of a catalytic combustion test device for SOFC provided in an embodiment of the present invention;

[0025] Figure 3 yes Figure 2 A magnified view of the local structure of the burner in the middle;

[0026] Figure 4 It is a flow chart of a testing method provided by an embodiment of the present invention.

[0027] In the figure: 1- fan; 2- heat exchanger; 3- mixing pipe; 4- burner; 5- heating device; 6- observation device; 7- exhaust gas proportional valve; 8- exhaust gas collecting bag; 9- bypass proportional valve; 21- outlet temperature sensor; 31- gas connecting pipe; 32- ejector; 41- catalyst carrier; 42- carrier temperature sensor; 43- connection port; 51- adjustable power supply; 52- first heating wire; 53- second heating wire; m- pressure sensor; n- temperature sensor; o- gas supply end. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Figure 1 It is a schematic structural diagram of a catalytic combustion test device for SOFC provided in an embodiment of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of a catalytic combustion test device for SOFC provided in an embodiment of the present invention;

[0030] Figure 3 yes Figure 2 A magnified view of the local structure of the burner. Figures 1 to 3 As shown, an embodiment of the present invention first provides a catalytic combustion test device for SOFC, including a fan 1, a heat exchanger 2, a mixing pipe 3, a burner 4, a heating device 5 and an observation device 6.

[0031] Among them, the inlet end of the fan 1 is used to connect the external air, and the outlet end of the fan 1 is connected to the cold stream inlet of the heat exchanger 2. The cold stream outlet of the heat exchanger 2 is connected to one end of the burner 4 through the mixing pipe 3, and the mixing pipe 3 is provided with a gas connecting pipe 31 for connecting to the gas supply end o. A catalyst carrier 41 is provided in the burner 4, and the other end of the burner 4 is connected to the hot stream inlet of the heat exchanger 2. The burner 4 is provided with a carrier temperature sensor 42 connected to the catalyst carrier 41. The heating device 5 is connected to the burner 4, and the two ends of the burner 4 are provided with a pressure sensor m and a temperature sensor n, and the observation device 6 is connected to the inner cavity of the burner 4.

[0032] In the embodiment of the present invention, as an important indicator for verifying the performance of the catalytic combustion catalyst, its effect on the ignition temperature of the gas is crucial. When the test device is used, the staff can first coat the catalyst to be tested on the catalyst carrier 41, wherein one end of the burner 4 is provided with a connection port 43 connected to the external pipeline, and the catalyst carrier 41 is detachably connected to the inner cavity of the burner 4. After selecting the catalyst to be tested and completing the coating on the catalyst carrier 41, the catalyst carrier 41 can be loaded into the inner cavity of the burner 4 through the connection port 43, and sealed and connected through a flange and other connecting structures, and then other parts are connected and installed in sequence to complete the assembly of the catalytic combustion test device for SOFC in preparation for the experiment. The above-mentioned detachable loading carrier structure is convenient for the staff to select different catalytic combustion catalysts according to different test requirements, and it is also convenient to remove the catalyst carrier 41 for maintenance and replacement after the test and when not in use, thereby improving the overall service life. The docking position between the burner 4 and the mixing pipe 3, as well as other combined assembly positions, are provided with a sealed and anti-blow-up gas graphite metal composite gasket structure, and the combined connection is fastened by a flange welded on the side wall to ensure connection stability and sealing.

[0033] Furthermore, after the test starts, the fan 1 is first started to provide air intake. At this time, the gas supply end o connected to the gas connecting pipe 31, such as a high-pressure gas bottle, is in a closed state. The burner 4 is preheated by the heating device 5 so that the temperature of the internal catalyst carrier 41 is close to the temperature required for catalytic combustion. Exemplarily, in an embodiment of the present invention, the heating device 5 includes an adjustable power supply 51 and a first heating wire 52, and the adjustable power supply 51 is electrically connected to the first heating wire 52, and the first heating wire 52 is wound on the outer wall of the burner 4. The burner 4 is uniformly heated by the first heating wire 52 spirally wound on the outer wall of the burner 4, and the heating power and disconnection of the first heating wire 52 are flexibly controlled by the adjustable power supply 51, so as to ensure the heating efficiency while meeting the rapid response and adaptation of different test conditions. While heating, the temperature of the catalyst carrier 41 is confirmed by the carrier temperature sensor 42 and the temperature sensor n arranged at the other end of the burner 4, and the ignition temperature T of the selected gas to be introduced is determined according to the ignition temperature T of the selected gas to be introduced. i To determine the power-off timing of the first heating wire 52, the ignition temperature of the catalytic combustion of the flammable organic structure is generally between 200°C and 400°C, so the power-off timing of the heating wire is when the carrier temperature reaches T g Power can be cut off when T g Through T g =T i -200≤300℃ to determine.

[0034] When the carrier temperature approaches the ignition temperature of the gas to be introduced, the heating device 5 is turned off, and the burner 4 and the newly introduced air are heated and heated by the residual heat of the first electric heating wire 52. At this time, the temperature is close to the ignition temperature of catalytic combustion. The gas is introduced into the mixing pipe 3 through the gas supply end o through the gas connecting pipe 31, and mixed with the external air introduced from the cold flow side of the heat exchanger 2 and enters the burner 4. As the temperature in the burner 4 increases, the mixed gas passing through the catalyst carrier 41 will be ignited when it reaches the burning temperature, and the exhaust gas after combustion in the burner 4 will enter the hot flow side of the heat exchanger 2 to heat the newly introduced air, simulating the operation of the heat exchanger in the SOFC system, effectively avoiding the waste of heat generated by combustion, and avoiding the catalytic combustion reaction being blown out by the mixer with a lower temperature due to the lack of intake heating, resulting in the inability to maintain stable combustion, and is inconsistent with the actual SOFC system. Exemplarily, in this step, the gas flow rate is determined according to a preset air excess coefficient, that is, the ratio of the actual air-fuel ratio to the theoretical air-fuel ratio, wherein the theoretical air-fuel ratio is a preset value determined before the test, and the actual air-fuel ratio can be controlled and confirmed by a gas flow meter arranged at the gas supply end o and an air flow meter at the external air entry position, which will not be elaborated herein in the present invention.

[0035] Afterwards, the pressure sensor m and temperature sensor n provided at both ends of the burner 4 are used for sensing, and the upper computer is used to record the carrier temperature, the front pressure and the front temperature at one end of the burner 4, and the rear pressure and the rear temperature at the other end of the burner 4 in real time. At the same time, the plug on the observation device 6 located at the rear end of the burner 4 is opened. For example, in an embodiment of the present invention, the observation device 6 is a high-temperature fire viewing mirror, and the tester can visually observe the working condition of the catalyst carrier 41 through the observation device 6. For example, when combustion occurs, the catalyst carrier 41 coated with a catalyst will glow. Finally, the ignition temperature is confirmed based on the rear end temperature variation curve over time and the working condition of the catalyst carrier 41. When the upper computer is used to observe the aforementioned recorded data, when the slope of the rear end temperature variation curve over time changes significantly, it means that part of the area inside the carrier has been ignited, and the carrier temperature T at this time is recorded. 20 Continue to monitor the catalyst carrier 41 in the observation device 6. When the catalyst carrier 41 suddenly glows at a certain moment, or the slope of the rear end temperature curve over time rises sharply, it means that the inside of the catalyst carrier 41 has been completely ignited and the catalytic combustion reaction has fully occurred. Record the carrier temperature T at this moment. 21 , the ignition temperature T can be finally defined B =(T 20 +T 21 ) / 2. By setting the ignition temperature T B By comparing it with the natural temperature of the incoming fuel gas, the performance of the catalyst can be verified.

[0036] The catalytic combustion test device for SOFC provided by the embodiment of the present invention is adopted, by simplifying and simulating part of the structure of the SOFC system, selecting parts related to the burner structure separately, and connecting them independently through pipelines, and setting corresponding sensors and other detection equipment at relevant positions to form the catalytic combustion test device for SOFC, so as to simulate the actual operating conditions of the burner in the SOFC system, so as to verify the performance of the catalyst in the burner in a targeted manner. Its assembly and setting are simple, and the catalyst to be tested can be set in the burner 4 through the catalyst carrier 41 according to different test requirements, and external air and fuel gas can be introduced for combustion test. At the same time, the high-temperature exhaust gas from the rear end of the burner 4 can be introduced into the hot stream side of the heat exchanger 2, and the air introduced from the cold stream side through the fan 1 can be regulated by the intake temperature, which can simply and quickly simulate the actual working conditions of the burner in the SOFC system under different working conditions, and realize the performance verification test of the catalyst.

[0037] Optionally, the hot flow outlet of the heat exchanger 2 is provided with an exhaust gas proportional valve 7. Exemplarily, in the embodiment of the present invention, by providing the exhaust gas proportional valve 7 at the hot flow outlet of the heat exchanger 2, the flow rate and speed of the combustion exhaust gas discharged from the heat exchanger 2 can be flexibly controlled to provide different heat exchange and temperature equalization effects.

[0038] Optionally, it also includes an exhaust gas collection bag 8 and a bypass proportional valve 9, the inlet of the bypass proportional valve 9 is connected to the pipeline between the other end of the burner 4 and the hot flow inlet of the heat exchanger 2, and the outlet of the bypass proportional valve 9 is connected to the exhaust gas collection bag 8. Further, in combination with the aforementioned exhaust gas proportional valve 7, an additional bypass consisting of a bypass proportional valve 9 and an exhaust gas collection bag 8 is set at the outlet section of the burner 4. On the basis of realizing the ignition temperature test of the catalyst using the test device, a complete conversion temperature test can be further performed. The steps are as follows:

[0039] In the ignition temperature test, the gas supply end o is used to introduce the gas into the mixing pipe 3 through the gas connecting pipe 31, and the gas is mixed with the external air introduced from the cold flow side of the heat exchanger 2 and enters the burner 4 for combustion. The catalytic combustion reaction in the catalyst carrier 41 fully occurs. When the carrier temperature reaches T21, the observation device is sealed with a plug. As the combustion proceeds, the new air will be continuously heated by the combustion exhaust gas. At the same time, the outlet exhaust gas temperature of the catalyst carrier 41 and the burner 4 will also increase. In order to confirm the complete conversion temperature of the fuel, it is necessary to open the bypass proportional valve 9 and close the exhaust proportional valve 7 so that the combustion exhaust gas can enter the exhaust collection bag 8 through the bypass proportional valve 9. A gas chromatograph is used to analyze the fuel gas concentration and CO concentration in the exhaust components in the bag to determine whether the gas is completely oxidized. The exhaust gas collection frequency is divided according to the temperature. Considering that the temperature rate during the combustion process is relatively fast, the temperature is T 21Samples are taken every 50℃ up to 700℃. The temperature rise rate will decrease above 700℃, and samples are taken every 25℃ until the temperature stabilizes.

[0040] The exhaust gas products collected by the exhaust gas collection bag 8 at different combustion temperature ranges are analyzed by a gas chromatograph. The detection order is from low to high temperature. If the CO and fuel gas concentrations in a certain temperature range are less than 5%, it is considered that the fuel gas in this temperature range is completely converted. The median value of this temperature range is the complete conversion temperature T of the fuel gas. trans .

[0041] Furthermore, the catalytic combustion test device can be used to perform the extinguishing limit test on the basis of completing the aforementioned ignition temperature test and complete conversion temperature test. The steps are as follows:

[0042] When the combustion reaches a stable state, close the bypass proportional valve 9 to reduce the gas flow m introduced from the gas supply end o. fuel Adjust the excess air coefficient λ, λ changes with m fuel The adjustment value of λ should not exceed 0.2 each time. After adjustment, the combustion should be maintained for 20 minutes. The slope of the curve of the rear end temperature of the burner 4 changing with time should be observed. If the temperature curve drops sharply, the excess air coefficient λ and the stable temperature value before the burner 4 is extinguished should be recorded. The stable temperature value is the flameout limit temperature T extin .

[0043] By using the testing device provided in the embodiment of the present invention, it is possible to implement low-cost and fast catalytic combustion catalyst performance testing, verify its ignition temperature, complete conversion temperature and extinction limit, and at the same time take into account testing under a variety of different fuel gases and different SOFC system operating conditions.

[0044] Optionally, an ejector 32 is provided at the connection between the gas connection pipe 31 and the mixing pipe 3. Exemplarily, in the embodiment of the present invention, by providing an ejector 32 at the inlet end of the high-pressure gas, the gas will form a low-pressure area in its mixing chamber after entering, and eject air, so that the air intake of the fan 1 on the external air introduction side is compressed, and the required power consumption of the fan 1 is reduced under the same air intake volume.

[0045] Optionally, an outlet temperature sensor 21 is provided between the cold stream outlet of the heat exchanger 2 and the ejector 32. Exemplarily, in the embodiment of the present invention, by providing the outlet temperature sensor 21 at the cold stream outlet of the heat exchanger 2, the temperature of the air introduced through the fan 1 and preheated in the heat exchanger 2 can be detected, which is convenient for the staff to use for experimental recording and as a reference indicator for overall adjustment.

[0046] Optionally, a second heating wire 53 is also included, which is wound around the heat exchanger 2 and electrically connected to the adjustable power supply 51. By way of example, in an embodiment of the present invention, the heat exchanger 2 adopts a shell and tube heat exchanger, which uses the wall surface of the tube bundle enclosed in the shell as a heat transfer surface to achieve indirect heat exchange between the external air and the high-temperature combustion exhaust gas between the cold stream side and the hot stream side. Furthermore, in addition to using the high-temperature exhaust gas of the burner 4 to introduce waste heat from the heat exchanger 2 to introduce air, it is also possible to control the heating through the adjustable power supply 51 to perform heat compensation by winding a heating wire around the heat exchanger 2, with the support of data from the outlet temperature sensor 21, to ensure the accuracy of the simulation of the exhaust gas temperature of the fuel cell stack.

[0047] Figure 4 is a flow chart of a testing method provided by an embodiment of the present invention, such as Figure 4 As shown, the embodiment of the present invention also provides a testing method based on Figures 1 to 3 The SOFC shown is implemented using a catalytic combustion test apparatus, comprising:

[0048] S1. Coat the catalyst to be tested on the catalyst carrier 41, and connect and install the catalytic combustion test device for SOFC;

[0049] S2, start the fan 1 to provide air intake, use the heating device 5 to preheat the burner 4, and use the carrier temperature sensor 42 and the temperature sensor n arranged at the other end of the burner 4 to confirm the temperature of the catalyst carrier 41;

[0050] S3, when the carrier temperature approaches the ignition temperature of the gas to be introduced, the heating device 5 is turned off, and the gas is introduced into the mixing pipe through the gas supply end;

[0051] S4. Use pressure sensor m and temperature sensor n for sensing, and use the host computer to record the carrier temperature, the front end pressure and front end temperature of one end of the burner 4, and the rear end pressure and rear end temperature of the other end of the burner 4 in real time. At the same time, check the working condition of the catalyst carrier 41 through the observation device 6, and confirm the ignition temperature based on the curve of the rear end temperature change over time and the working condition of the catalyst carrier 41.

[0052] The catalytic combustion test device for SOFC provided by the embodiment of the present invention is used and the above-mentioned test method is performed. By simplifying and simulating part of the structure of the SOFC system, parts related to the burner structure are selected separately, and independently connected through pipelines, and corresponding sensors and other detection equipment are set at relevant positions to form the catalytic combustion test device for SOFC, so as to simulate the actual operating conditions of the burner in the SOFC system, so as to verify the performance of the catalyst in the burner in a targeted manner. Its assembly and setting are simple, and the catalyst to be tested can be set in the burner 4 through the catalyst carrier 41 according to different test requirements, and external air and gas are introduced for combustion test. At the same time, the high-temperature exhaust gas from the rear end of the burner 4 can be introduced into the hot stream side of the heat exchanger 2, and the air introduced from the cold stream side through the fan 1 is regulated by the intake temperature, which can simply and quickly simulate the actual working conditions of the burner in the SOFC system under different working conditions, and realize the performance verification test of the catalyst.

[0053] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0054] The above descriptions are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A catalytic combustion test device for SOFC, characterized in that: include: A fan (1), a heat exchanger (2), a mixing pipe (3), a burner (4), a heating device (5) and an observation device (6), The inlet end of the fan (1) is used to communicate with the outside air, the outlet end of the fan (1) is connected to the cold stream inlet of the heat exchanger (2), the cold stream outlet of the heat exchanger (2) is connected to one end of the burner (4) through the mixing pipe (3), the mixing pipe (3) is provided with a gas connecting pipe (31) for connecting to the gas supply end, a catalyst carrier (41) is provided in the burner (4), the other end of the burner (4) is connected to the hot stream inlet of the heat exchanger (2), the burner (4) is provided with a carrier temperature sensor (42) connected to the catalyst carrier (41), the heating device (5) is connected to the burner (4), both ends of the burner (4) are provided with a pressure sensor (m) and a temperature sensor (n), and the observation device (6) is connected to the inner cavity of the burner (4).

2. The catalytic combustion test device for SOFC according to claim 1, characterized in that: The catalyst carrier (41) is detachably connected to the inner cavity of the burner (4).

3. The catalytic combustion test device for SOFC according to claim 1, characterized in that: The hot flow outlet of the heat exchanger (2) is provided with an exhaust gas proportional valve (7).

4. The catalytic combustion test device for SOFC according to claim 3, characterized in that: It also includes an exhaust gas collection bag (8) and a bypass proportional valve (9), wherein the inlet of the bypass proportional valve (9) is connected to the pipeline between the other end of the burner (4) and the hot flow inlet of the heat exchanger (2), and the outlet of the bypass proportional valve (9) is connected to the exhaust gas collection bag (8).

5. The catalytic combustion testing device for SOFC according to claim 1, characterized in that: An ejector (32) is provided at the connection point between the gas connecting pipe (31) and the mixing pipe (3).

6. The catalytic combustion test device for SOFC according to claim 5, characterized in that: An outlet temperature sensor (21) is provided between the cold stream outlet of the heat exchanger (2) and the ejector (32).

7. The catalytic combustion testing device for SOFC according to claim 1, characterized in that: The heating device (5) comprises an adjustable power supply (51) and a first heating wire (52); the adjustable power supply (51) is electrically connected to the first heating wire (52); and the first heating wire (52) is wound around the outer wall of the burner (4).

8. The catalytic combustion testing device for SOFC according to claim 7, characterized in that: It also includes a second heating wire (53), which is wound around the heat exchanger (2) and electrically connected to the adjustable power supply (51).

9. The catalytic combustion testing device for SOFC according to claim 8, characterized in that: The heat exchanger (2) is a shell and tube heat exchanger.

10. A test method, implemented based on the catalytic combustion test device for SOFC according to any one of claims 1 to 9, characterized in that: include: The catalyst to be tested is coated on the catalyst carrier (41), and the catalytic combustion test device for SOFC is connected and installed; The fan (1) is started to provide air intake, the burner (4) is preheated by the heating device (5), and the temperature of the catalyst carrier (41) is confirmed by the carrier temperature sensor (42) and the temperature sensor (n) disposed at the other end of the burner (4); When the temperature of the carrier approaches the ignition temperature of the gas to be introduced, the heating device (5) is turned off, and the gas is introduced into the mixing pipe through the gas supply end; The pressure sensor (m) and the temperature sensor (n) are used for sensing, and a host computer is used to record in real time the carrier temperature, the front end pressure and the front end temperature of one end of the burner (4), and the rear end pressure and the rear end temperature of the other end of the burner (4). At the same time, the working condition of the catalyst carrier (41) is checked through the observation device (6), and the ignition temperature is confirmed based on the curve of the rear end temperature change over time and the working condition of the catalyst carrier (41).

Images