Closed reaction and test device and method

Abstract

The invention relates to the technical field of testing devices, and provides a closed reaction and testing device and method.The device comprises a pressure container, a gas supply component, a high-pressure gas supply component, a heating component and a monitoring component, the gas supply component is connected with the pressure container so as to convey first combustible gas, second combustible gas and water vapor into the pressure container, and the high-pressure gas supply component is connected with the pressure container; the high-pressure gas supply part is connected with the pressure container to convey high-pressure gas into the pressure container so as to adjust the pressure in the pressure container, the heating part wraps the periphery of the pressure container to heat the pressure container, and the monitoring part comprises a plurality of optical sensors, a plurality of temperature sensors and a pressure sensor. The optical sensors are arranged on the inner wall of the pressure container at equal intervals in the vertical direction, the temperature sensors are arranged in the pressure container at equal intervals in the vertical direction, the pressure sensor is arranged on the inner wall of the pressure container, the gas analyzer is connected to the pressure container, and two kinds of gas are mixed to detect equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and in particular to a closed reaction, testing device and method. Background Art

[0002] In the process of testing some equipment, combustion and compound reactions are required, which requires facing high temperature, high pressure, steam or some special gas environments. For example, for some special-purpose catalytic combustion hydrogen concentration sensors, it is necessary to test them in a high temperature, steam and hydrogen environment with a certain concentration. For example, different types of igniters need to test their ignition performance under different working conditions. These tests contain flammable gases such as hydrogen. There may be extreme environments such as high temperature and high pressure during the test process. Suitable places or equipment are required to carry out the test, and key parameters such as temperature, pressure, concentration, and flash are monitored during the process.

[0003] However, at present, due to the complex mechanisms of different recombination and explosion behaviors of different gases, it is particularly difficult to understand the laws of mutual influence of different recombination and explosion mechanisms under mixed gas conditions. It is even more incompatible with the presence of toxic gases. When combustion, recombination and other reactions occur, it is even more difficult to conduct online real-time performance testing of the electrical properties and working characteristics of the detection equipment. Therefore, most of the current test devices are specially designed for the characteristics of a flammable gas and cannot meet the complex testing requirements under many actual working conditions. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a closed reaction, testing device and method, which can mix two gases to detect equipment under the condition of the presence of toxic gas.

[0005] On the one hand, the present invention provides a closed reaction and testing device, including: a pressure vessel, a gas supply component, a high-pressure gas supply component, a heating component and a monitoring component, the gas supply component is connected to the pressure vessel to respectively deliver a first combustible gas, a second combustible gas and water vapor therein, wherein one of the first combustible gas and the second combustible gas is a toxic gas, the high-pressure gas supply component is connected to the pressure vessel to deliver high-pressure gas therein, thereby adjusting the pressure in the pressure vessel, the heating component is wrapped around the outer circumference of the pressure vessel to heat the pressure vessel, the monitoring component includes: a plurality of optical sensors, a plurality of temperature sensors and a pressure sensor, the plurality of optical sensors are arranged on the inner wall of the pressure vessel at equal intervals along the vertical direction to monitor the flame propagation speed, the plurality of temperature sensors are arranged in the pressure vessel at equal intervals along the vertical direction to monitor the temperature changes at different positions in the pressure vessel, the pressure sensor is arranged on the inner wall of the pressure vessel to monitor the pressure in the pressure vessel, and the gas analyzer is connected to the pressure vessel to monitor the concentrations of various gases in the pressure vessel.

[0006] Optionally, the gas supply component includes: a first combustible gas cylinder, a second combustible gas cylinder and a water vapor supply assembly. The second combustible gas cylinder is connected in parallel with the first combustible gas cylinder and is sealed connected to the pressure vessel through a gas pipeline. The water vapor supply assembly is sealed connected to the pressure vessel through a steam pipeline. Pressure reducing valves and flow controllers are sequentially arranged on the gas pipeline and the steam pipeline along the air inlet direction.

[0007] Optionally, a flame arrester is also provided on the gas pipeline, and the flame arrester is located between the pressure reducing valve and the flow controller.

[0008] Optionally, a plurality of temperature sensors are arranged at equal intervals along the vertical direction on the central axis of the pressure vessel.

[0009] Optionally, a plurality of agitators are provided in the pressure vessel, each agitator comprising a motor and a fan blade connected to an output shaft of the motor, the motor is fixed to an outer wall of the pressure vessel, the output shaft extends into the interior of the pressure vessel, and the fan blade is located inside the pressure vessel.

[0010] Optionally, the pressure vessel is also connected to an exhaust gas purification component, which includes a dewatering tank and a catalytic reaction tank connected to the pressure vessel in sequence to remove water vapor and flammable and harmful gases in the exhaust gas discharged from the pressure vessel.

[0011] Optionally, the catalytic reaction tank is connected to a secondary pressure relief tank.

[0012] Optionally, gas sampling interfaces are provided on the upper and lower parts of the pressure vessel, and the gas sampling interfaces are connected to a gas analyzer.

[0013] Optionally, the heating component includes a heating plate and a thermal insulation layer, the heating plate is wrapped around the outer circumference of the pressure vessel, and the thermal insulation layer is wrapped around the outer circumference of the heating plate.

[0014] Another aspect of the present invention provides a closed reaction and testing method, using the closed reaction and testing device, comprising the following steps:

[0015] Place the equipment to be tested into the pressure vessel;

[0016] Start the heating component to raise the temperature in the pressure vessel to the target temperature;

[0017] Fill with water vapor and high-pressure gas to make the water vapor concentration and pressure in the pressure vessel meet the test requirements;

[0018] Fill the first combustible gas and the second combustible gas, and monitor the concentration of the relevant gases in the pressure vessel in real time through a gas analyzer until the requirements are met;

[0019] All monitoring data are continuously collected during the test.

[0020] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0021] The closed reaction and testing device and method provided by the embodiment of the present invention controls the injection sequence of the first combustible gas and the second combustible gas through a gas supply component according to the reaction temperature, concentration and pressure characteristics of the first combustible gas and the second combustible gas, monitors the concentration of relevant gases in the pressure vessel in real time through a gas analyzer, injects ambient pressure through a high-pressure gas supply component and monitors the internal pressure in real time through a pressure sensor to make it meet the test standard, adjusts the temperature in the pressure vessel through a heating component, and uses multi-point temperature sensors at different upper and lower and horizontal positions to grasp the concentration of the mixed gas in real time, adjusts the distribution of different gases according to the grasped concentration of the mixed gas, and monitors the flame propagation speed through an optical sensor, so as to adjust and control the reaction process of different gases, thereby realizing the detection of the equipment by mixing two gases under the condition of the presence of toxic gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a closed reaction and testing device provided in an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the internal structure of a pressure vessel provided in an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1. Pressure vessel; 2. First combustible gas cylinder; 3. Second combustible gas cylinder; 4. Pressure reducing valve; 5. Flow controller; 6. Flame arrester; 7. Optical sensor; 8. Temperature sensor; 9. Pressure sensor; 10. Agitator; 11. Dewatering tank; 12. Catalytic reaction tank; 13. Secondary pressure relief tank; 14. Gas sampling interface; 15. Gas analyzer; 16. High-pressure air compressor; 17. Gas storage tank; 18. High-pressure boiler; 19. Water softener. DETAILED DESCRIPTION

[0026] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0027] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do 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.

[0028] Most current testing devices are designed specifically for the characteristics of a single flammable gas and are unable to meet the complex testing requirements under many actual working conditions.

[0029] To this end, an embodiment of the present invention provides a closed reaction, testing device and method, which can mix two gases to detect the equipment under the condition of the presence of toxic gas.

[0030] At least one embodiment of the present invention provides a closed reaction and testing device, including: a pressure vessel, a gas supply component, a high-pressure gas supply component, a heating component and a monitoring component, the gas supply component is connected to the pressure vessel to respectively deliver a first combustible gas, a second combustible gas and water vapor therein, wherein one of the first combustible gas and the second combustible gas is a toxic gas, the high-pressure gas supply component is connected to the pressure vessel to deliver high-pressure gas therein, thereby adjusting the pressure in the pressure vessel, the heating component is wrapped around the outer circumference of the pressure vessel to heat the pressure vessel, the monitoring component includes: a plurality of optical sensors, a plurality of temperature sensors and a pressure sensor, the plurality of optical sensors are arranged on the inner wall of the pressure vessel at equal intervals along the vertical direction to monitor the flame propagation speed, the plurality of temperature sensors are arranged in the pressure vessel at equal intervals along the vertical direction to monitor the temperature changes at different positions in the pressure vessel, the pressure sensor is arranged on the inner wall of the pressure vessel to monitor the pressure in the pressure vessel, and the gas analyzer is connected to the pressure vessel to monitor the concentrations of various gases in the pressure vessel.

[0031] In the closed reaction, testing device and method provided by the above-mentioned embodiments of the present invention, various monitoring data in the pressure vessel are grasped in real time by the monitoring component, the gas concentration in the pressure vessel is adjusted by adjusting the gas supply component, the pressure in the pressure vessel is adjusted by the high-pressure gas supply component, and the temperature in the pressure vessel is adjusted by the heating component, so that the reaction process of different gases can be adjusted and controlled, and the equipment can be tested by mixing two gases under the condition of the presence of toxic gas.

[0032] The present invention is described below by several specific embodiments. In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components may be omitted. When any component of the embodiments of the present invention appears in more than one accompanying drawings, the component may be represented by the same reference numeral in each of the accompanying drawings.

[0033] refer to Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram of the structure of a closed reaction and testing device provided in an embodiment of the present invention, Figure 2 A schematic diagram of the internal structure of a pressure vessel provided in an embodiment of the present invention is shown in FIG. Figure 1 and Figure 2 As shown, the first embodiment of the present invention provides a closed reaction and testing device, including: a pressure vessel 1, a gas supply component, a high-pressure gas supply component, a heating component and a monitoring component, the gas supply component is connected to the pressure vessel 1 to respectively deliver a first combustible gas, a second combustible gas and water vapor therein, wherein one of the first combustible gas and the second combustible gas is a toxic gas, the high-pressure gas supply component is connected to the pressure vessel 1 to deliver high-pressure gas therein, thereby adjusting the pressure in the pressure vessel 1, the heating component is wrapped around the outer periphery of the pressure vessel 1 to heat the pressure vessel 1, the monitoring component It includes: multiple optical sensors 7, multiple temperature sensors 8 and pressure sensors 9. The multiple optical sensors 7 are arranged on the inner wall of the pressure vessel 1 at equal intervals along the vertical direction to monitor the flame propagation speed. The multiple temperature sensors 8 are arranged in the pressure vessel 1 at equal intervals along the vertical direction to monitor the temperature changes at different positions in the pressure vessel 1. The pressure sensor 9 is arranged on the inner wall of the pressure vessel 1 to monitor the pressure in the pressure vessel 1. The gas analyzer 15 is connected to the pressure vessel 1 to monitor the concentrations of various gases in the pressure vessel 1. For example, the first combustible gas can be hydrogen and the second combustible gas can be carbon monoxide.

[0034] In this embodiment, the pressure vessel 1 is composed of a cylindrical straight section and top covers at both ends. The distance between the upper and lower top covers is about 130 cm, and the diameter of the straight section is about 80 cm. The main body is made of cast iron and surface anti-corrosion treatment is performed. The larger the size of the pressure vessel 1, the higher the pressure resistance requirement. The current size is a comprehensive and better choice under the conditions of meeting the size requirements and pressure resistance requirements of the test equipment. The working pressure of the pressure vessel 1 is not less than 100 atmospheres. At the same time, a burst valve is set on the pressure vessel 1 to prevent shock wave damage. The optical sensor 7 measures the flame propagation speed by measuring the arrival time of the flame front, and then evaluates the severity of the combustion reaction. The straight and equidistant arrangement is convenient for determining the distance between two measuring points through the measuring point position along the rising and falling propagation directions of the flame, and then calculating the flame propagation speed through the arrival time difference. In this embodiment, there are four optical sensors 7, and 4 optical sensors 7 are set at different heights on the side wall of the straight section. If there are too many, the measurement ranges of adjacent optical sensors will overlap, and if there are too few, the amount of measurement data will be insufficient. The pressure sensor 9 cannot be in the recessed area and needs to be fixed on the wall of the straight section.

[0035] The closed reaction and testing device and method provided by the embodiment of the present invention controls the injection sequence of the first combustible gas and the second combustible gas through a gas supply component according to the reaction temperature, concentration and pressure characteristics of the first combustible gas and the second combustible gas, monitors the concentration of relevant gases in the pressure vessel in real time through a gas analyzer, injects ambient pressure through a high-pressure gas supply component and monitors the internal pressure in real time through a pressure sensor to make it meet the test standard, adjusts the temperature in the pressure vessel through a heating component, and uses multi-point temperature sensors at different upper and lower and horizontal positions to grasp the concentration of the mixed gas in real time, adjusts the distribution of different gases according to the grasped concentration of the mixed gas, and monitors the flame propagation speed through an optical sensor, so as to adjust and control the reaction process of different gases, thereby realizing the detection of the equipment by mixing two gases under the condition of the presence of toxic gas.

[0036] Optionally, the gas supply component includes: a first combustible gas cylinder 2, a second combustible gas cylinder 3 and a water vapor supply assembly. The second combustible gas cylinder 3 is connected in parallel with the first combustible gas cylinder 2 and is sealed connected to the pressure vessel 1 through a gas pipeline. The water vapor supply assembly is sealed connected to the pressure vessel 1 through a steam pipeline. A pressure reducing valve 4 and a flow controller 5 are sequentially arranged along the gas pipeline and the steam pipeline in the air intake direction. Considering the sealing reasons, the fewer penetrating parts the better to prevent leakage, so that the second combustible gas cylinder 3 is connected in parallel with the first combustible gas cylinder 2 and is sealed connected to the pressure vessel 1 through a gas pipeline. In addition, the flow controller 5 can also be shared. The pressure reducing valve 4 can protect the measuring instrument For example, the flow controller 5 has an inlet pressure limit. The pressure directly discharged from the high-pressure gas supply component is too high and needs to be reduced by the pressure reducing valve 4. The flow controller 5 can provide the value of the cumulative input flow, that is, the mass / volume / concentration of the first combustible gas and the second combustible gas injected into the pressure vessel 1 is controlled to prevent the combustion flame in the pressure vessel 1 from entering the pipeline and damaging the instrument. The water vapor supply component includes a high-pressure boiler 18 and a water softener 19 which are connected to the pressure vessel 1 in sequence. The water is first softened by the water softener 19 and then enters the high-pressure boiler 18 to form pure water vapor and then enters the pressure vessel 1, thereby ensuring that the water vapor carries impurities during the reaction and interferes with the reaction.

[0037] Specifically, a flame arrester 6 is also provided on the gas pipeline. The flame arrester 6 is located between the pressure reducing valve 4 and the flow controller 5. The flame arrester 6 can prevent the combustion flame in the pressure vessel 1 from entering the gas pipeline and damaging the instrument.

[0038] In this embodiment, a plurality of temperature sensors 8 are arranged at equal intervals along the vertical direction on the central axis of the pressure vessel 1 , which is advantageous for detecting a symmetrical flame or temperature field with fewer temperature sensors 8 .

[0039] For the concentration control of the mixed gas, in the embodiment of the present invention, a plurality of agitators 10 are arranged in the pressure vessel 1, each agitator 10 includes a motor and a fan blade connected to the output shaft of the motor, the motor is fixed to the outer wall of the pressure vessel 1, the output shaft extends into the interior of the pressure vessel 1, the fan blade is located inside the pressure vessel 1, the agitator 10 can agitate the internal gas so that the concentration of the mixed gas in each place is equivalent, considering the combustion phenomenon in the pressure vessel 1, it is necessary to adopt a high temperature resistant shielded agitator, so all motors are arranged outside the pressure vessel 1, and only the mechanical transmission shaft is input into the pressure vessel 1 to drive the blades to rotate.

[0040] The treatment of tail gases of different toxicities is also a challenge faced by current reaction vessels. For this reason, current reaction test equipment can only target a single flammable gas.

[0041] Based on the above problems, in an embodiment of the present invention, the pressure vessel 1 is also connected to an exhaust gas purification component, which includes a dehydration tank 11 and a catalytic reaction tank 12 which are sequentially connected to the pressure vessel 1 to remove water vapor and flammable and harmful gases in the exhaust gas discharged from the pressure vessel 1. Specifically, the dehydration tank 11 has multiple dehydration and multiple adsorption layers. The first layer adsorbs supersaturated vapor and has a drain switch. The latter two layers adsorb unsaturated gas at high humidity and low humidity respectively. The catalytic reaction tank 12 contains targeted toxic gas adsorption materials to ensure the adsorption of gases such as the second combustible gas. It can be arranged as long as it is not the lowest point. There will be water accumulation at the lowest point, which will destroy the effect of the dehydration tank 11. The dehydration tank 11 can remove water vapor in the exhaust gas discharged from the pressure vessel to ensure that the gas discharged therefrom is dry and catalytically reacts. 12 is used to treat flammable and harmful gases such as the first combustible gas or the second combustible gas in the exhaust gas. When the exhaust gas passes through the catalytic reaction tank 12, the flammable and harmful gases therein will react with oxygen under the catalytic action and be consumed.

[0042] Specifically, the catalytic reaction tank 12 is connected to a secondary pressure relief tank 13, and a secondary pressure relief tank 13 is arranged downstream of the exhaust gas purification component. The volume of the secondary pressure relief tank 13 is 12m 3 The volume of the secondary leakage tank can be approximately 10 times greater than the volume of pressure vessel 1, which can provide a buffering effect.

[0043] In this embodiment, gas sampling interfaces 14 are provided at the upper and lower parts of the pressure vessel 1, and the gas sampling interfaces 14 are connected to the gas analyzer 15. A gas sampling interface 14 is provided at 8 cm away from the central axis of the pressure vessel 1, about 28 cm and 72 cm away from the bottom cover, respectively. The gas analyzer 15 can take real-time samples and measurements from the sampling port.

[0044] In this embodiment, the heating component includes a heating plate and an insulation layer. The heating plate is wrapped around the outer periphery of the pressure vessel 1, and the insulation layer is wrapped around the outer periphery of the heating plate. A track-type heating plate is wrapped around the cylindrical section outside the pressure vessel 1 and fixed with stainless steel straps and stainless steel wires. An insulation layer is provided outside the heating plate to insulate the whole, so the container can be heated to meet the temperature requirements of the experimental working conditions. The track-type type can fit the curved surface and, compared with the heating wire / heating belt, has a wider heating surface, which reduces the number of winding turns and improves durability.

[0045] It should be noted that in this embodiment, due to the presence of toxic gases, sealing is very important. Several flange openings are provided on the side wall of the pressure vessel 1 for the relevant equipment to be tested to enter and exit the pressure vessel 1. Each flange hole is equipped with a sealing component, a window component and a threading component. The sealing component can seal the flange hole to ensure the integrity of the boundary of the pressure vessel 1. The window component seals the flange hole and reserves a transparent observation hole to observe the internal situation of the container from the outside. The threading component can pass the cable while ensuring the sealing, and can provide a cable channel for the test equipment that needs power supply or data acquisition. Different components can be used at the flange hole according to the needs of the equipment to be tested. The power line and the signal line are tightened by the sealing technology of the internal and external pressure difference of the inclined surface and the glue sealing to ensure the threading sealing. The power line / signal line is wrapped with a variety of moisture-proof and pressure-resistant coating layers in the tank, and is kept away from the high temperature area without interfering with the measurement. The probe is arranged at a high position relative to the lead to ensure that various liquids are guided by gravity to prevent accumulation at the probe. Metal pipes and high-pressure flanges are used for injecting and extracting gas.

[0046] At least one embodiment of the present invention provides a closed reaction and testing method, using the closed reaction and testing device, comprising the following steps:

[0047] Place the device to be tested into the pressure vessel 1;

[0048] Start the heating component to raise the temperature in the pressure vessel 1 to the target temperature;

[0049] Filling water vapor and high-pressure gas so that the water vapor concentration and pressure in the pressure vessel 1 meet the test requirements;

[0050] Fill the first combustible gas and the second combustible gas, and monitor the concentration of the relevant gases in the pressure vessel 1 in real time through the gas analyzer 15 until the requirements are met;

[0051] All monitoring data are continuously collected during the test.

[0052] The overall operation process is as follows:

[0053] 1. Install the equipment to be tested into the pressure vessel through the flange hole on the side wall of the pressure vessel, select appropriate components to seal the flange hole according to the test requirements, and start the test after confirming that the seal is intact;

[0054] 2. Start the heating component outside the pressure vessel to raise the temperature inside the pressure vessel to the target temperature;

[0055] 3. Fill water vapor and compressed air as needed to make the steam concentration and pressure in the pressure vessel meet the requirements;

[0056] 4. Fill hydrogen and carbon monoxide as needed, and the gas analyzer monitors the concentration of relevant gases in the container in real time through sampling products until the requirements are met;

[0057] 5. After confirming that all parameters in the pressure vessel meet the test requirements, start the test and continuously collect monitoring data from all sensors during the test.

[0058] 6. After the test is completed, start the exhaust gas purification component to discharge the gas in the pressure vessel into the exhaust gas purification component, and then use the air compressor to replace the residual gas in the pressure vessel with dry air.

[0059] 7. After the temperature of the pressure vessel drops to a safe level, you can open the flange hole and take out the tested equipment.

[0060] The above inventions are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A closed reaction and testing device, characterized in that: include: Pressure vessel (1); a gas supply component connected to the pressure vessel (1) to respectively deliver a first combustible gas, a second combustible gas and water vapor therein, wherein one of the first combustible gas and the second combustible gas is a toxic gas; a high-pressure gas supply component connected to the pressure container (1) to deliver high-pressure gas thereto, thereby adjusting the pressure in the pressure container (1); A heating component wrapped around the outer circumference of the pressure container (1) to heat the pressure container (1); The monitoring component comprises: a plurality of optical sensors (7), a plurality of temperature sensors (8), a pressure sensor (9) and a gas analyzer (15); the plurality of optical sensors (7) are arranged at equal intervals along the vertical direction on the inner wall of a pressure vessel (1) to monitor the flame propagation speed; the plurality of temperature sensors (8) are arranged at equal intervals along the vertical direction in the pressure vessel (1) to monitor the temperature change at different positions in the pressure vessel (1); the pressure sensor (9) is arranged on the inner wall of the pressure vessel (1) to monitor the pressure in the pressure vessel (1); and the gas analyzer (15) is connected to the pressure vessel (1) to monitor the concentrations of various gases in the pressure vessel (1).

2. A closed reaction and testing device as claimed in claim 1, characterized in that: The gas supply component comprises: The first flammable gas cylinder (2); A second combustible gas cylinder (3), which is connected in parallel with the first combustible gas cylinder (2) and is sealedly connected to the pressure container (1) via a gas pipeline; The water vapor supply component is sealedly connected to the pressure vessel (1) via a steam pipeline, and a pressure reducing valve (4) and a flow controller (5) are sequentially arranged on the gas pipeline and the steam pipeline along the air inlet direction.

3. A closed reaction and testing device as claimed in claim 2, characterized in that: The gas pipeline is also provided with a flame arrester (6), and the flame arrester (6) is located between the pressure reducing valve (4) and the flow controller (5).

4. A closed reaction and testing device as claimed in claim 1, characterized in that: The plurality of temperature sensors (8) are arranged at equal intervals in the vertical direction on the central axis of the pressure vessel (1).

5. A closed reaction and testing device as claimed in claim 1, characterized in that: A plurality of agitators (10) are arranged in the pressure vessel (1), each of the agitators (10) comprising a motor and a fan blade connected to an output shaft of the motor, the motor being fixed to the outer wall of the pressure vessel (1), the output shaft extending into the interior of the pressure vessel (1), and the fan blade being located inside the pressure vessel (1).

6. A closed reaction and testing device as claimed in claim 1, characterized in that: The pressure vessel (1) is also connected to an exhaust gas purification component, which comprises a dewatering tank (11) and a catalytic reaction tank (12) which are sequentially connected to the pressure vessel (1) to remove water vapor and flammable and harmful gases in the exhaust gas discharged from the pressure vessel (1).

7. A closed reaction and testing device as claimed in claim 6, characterized in that: The catalytic reaction tank (12) is connected to a secondary pressure relief tank (13).

8. A closed reaction and testing device as claimed in claim 1, characterized in that: The upper and lower parts of the pressure container (1) are both provided with gas sampling interfaces (14), and the gas sampling interfaces (14) are connected to a gas analyzer (15).

9. A closed reaction and testing device as claimed in claim 1, characterized in that: The heating component comprises a heating plate and a heat-insulating layer, wherein the heating plate is wound around the outer circumference of the pressure vessel (1), and the heat-insulating layer is wrapped around the outer circumference of the heating plate.

10. A closed reaction and testing method, using the closed reaction and testing device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Place the device to be tested into a pressure vessel (1); Starting the heating component to raise the temperature in the pressure vessel (1) to a target temperature; Filling water vapor and high-pressure gas so that the water vapor concentration and pressure in the pressure vessel (1) meet the test requirements; Filling the first combustible gas and the second combustible gas, and monitoring the concentration of the relevant gases in the pressure vessel (1) in real time through a gas analyzer (15) until the requirements are met; All monitoring data are continuously collected during the test.

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