A multi-phase mixed combustible gas diffusion test gas path system

Abstract

The application is a kind of multiphase mixed combustible gas diffusion test gas path system, including gas inlet system, gas constant temperature system, mixed gas parameter control system, gas washing system; the multiphase mixed combustible gas diffusion test gas path system provided by the application is based on the combustion and diffusion research of multiphase mixed gas, and is suitable for multi-component gas research. The gas flow of all pipelines of the system is controlled by a computer, wherein digital elements such as ball valves and pressure reducing valves are used, thereby realizing high automation and intelligence of gas research system gas inlet, gas mixing and tail gas treatment. The system realizes accurate regulation and control of mixed gas components and flow through the control computer and mass flow meter, and can research the diffusion and combustion rules of different component gases.

Description

Technical Field

[0001] This invention relates to the field of gas diffusion safety, and specifically to a gas path system for testing the diffusion of multiphase mixed combustible gases. Background Technology

[0002] Combustible gases (such as natural gas, hydrogen, and liquefied petroleum gas) have wide applications in the energy and chemical industries. However, leaks during storage or transportation can easily trigger explosions, causing severe economic losses and casualties. Preventing such accidents hinges on accurately understanding gas diffusion patterns, thereby optimizing sensor placement, developing emergency response strategies, and taking appropriate measures to effectively mitigate the damage.

[0003] In recent years, researchers have conducted numerous studies in the field of gas detection and mixing, inventing various systems, devices, and methods with different functions. Patent CN202510397265.8 discloses an adaptive system for multiple gas sensors and its parameter calculation method, capable of adapting to different types of gas sensors, achieving intelligent adaptive multi-gas detection without increasing cost, and accurately calculating the concentration of different gases. Patent CN202411875930.1 discloses a gas detection method and device applied in semiconductor manufacturing, which, through the design of a gas mixing system, utilizes the principle of thermal effects generated by different gases being irradiated with infrared light of specific frequencies to detect the ratio of phosphine and hydrogen in a mixed gas in real time. Patent CN202510211162.8 discloses a high-precision gas mixing device and method, which, by setting different mixing sections, detection components, and controllers, improves the mixing effect of multiple gases, facilitates precise control of the mixing ratio, and can monitor the pressure of the mixed gas in real time, keeping it stable within a safe range. Current research mainly focuses on the practical applications of gas detection and mixing, aiming to meet the requirements for gas detection accuracy, mixing ratio control, and pressure monitoring in different scenarios. However, there is a lack of relevant foundation in the gas path delivery control system of gas regularity test systems. Summary of the Invention

[0004] Based on the above, the present invention is an intelligent control gas path system for studying the combustion, explosion and diffusion laws of multiphase mixed gases.

[0005] The technical solution provided to achieve the purpose of this invention is as follows:

[0006] This invention provides a gas path system for a multiphase mixed combustible gas diffusion test, comprising an air cylinder (1-1), a gas cylinder (1-2), a gas cylinder (1-3), a gas cylinder (1-4), a pressure reducing valve (2-1), a pressure reducing valve (2-2), a pressure reducing valve (2-3), and a pressure reducing valve (2-4) forming an air intake system;

[0007] The constant temperature gas tank (3-1), constant temperature gas tank (3-2), constant temperature gas tank (3-3), constant temperature gas tank (3-4), and water bath (4) constitute a gas constant temperature system;

[0008] The control computer (5), ball valves (6-1), (6-2), (6-3), (6-4), digital pressure gauges (7-1), (7-2), (7-3), (7-4), ball valves (8-1), (8-2), (8-3), (8-4), (8-5), (8-6), mass flow meters (9-1), (9-2), and (9-3) together constitute the mixed gas parameter control system;

[0009] The air scrubbing system consists of ball valves (11-1), (11-2), (11-3), (11-4), (11-5), (12-1), (12-2), (12-3), (12-4), vacuum pump (15), and spray tower (16).

[0010] Among them, the control computer (5) outputs control signals to the pressure reducing valve (2-1), pressure reducing valve (2-2), pressure reducing valve (2-3), pressure reducing valve (2-4), ball valve (6-1), ball valve (6-2), ball valve (6-3), and ball valve (6-4) to control the valve opening and closing;

[0011] Digital pressure gauges (7-1), (7-2), (7-3), and (7-4) send pressure signals to the control computer (5). Upon receiving the signals, the control computer (5) determines whether the gas in the gas pipeline has reached the set value. After completing the gas intake, it outputs control signals to the pressure reducing valves (2-1), (2-2), (2-3), (2-4), (6-1), (6-2), (6-3), and (6-4) to control the valve opening and closing.

[0012] The control computer (5) outputs control signals to ball valves (8-1), (8-2), (8-3), (8-4), (8-5), (8-6), mass flow meter (9-1), (9-2), and (9-3). After receiving the signals, the mass flow meter (9-1), (9-2), and (9-3) control the flow rate of each component gas and the component entering the gas mixing tank (13), and send a signal to the control computer (5) indicating that the gas delivery is complete. After judging, the control computer (5) outputs a shut-off signal to ball valves (8-1), (8-2), (8-3), (8-4), (8-5), (8-6), (9-1), (9-2), and (9-3).

[0013] After the gas is fully mixed, the control computer (5) opens the ball valve (10-1) and the ball valve (10-2), and the gas flows into the main body (14) of the test tank. After the simulated gas intake is completed, the ball valve (10-1) and the ball valve (10-2) are closed.

[0014] The vacuum pump (15) is connected to the constant temperature gas tank (3-1), constant temperature gas tank (3-2), constant temperature gas tank (3-3), constant temperature gas tank (3-4), test tank body (14), and spray tower (16) through ball valve (11-1), ball valve (11-2), ball valve (11-3), ball valve (11-4), and ball valve (11-5) to achieve vacuuming and gas washing inside the tank.

[0015] Furthermore, the main body (14) of the test tank is made of titanium alloy, with a length × width × height of 460mm × 420mm × 830mm. There is a viewing window in the center, with a size of length × width × thickness of 300mm × 600mm × 15mm, and it is made of high-transparency quartz glass. The side wall of the main body (14) of the experimental device has M20×1.5 and M8×1 threaded holes.

[0016] Furthermore, all gas lines are made of 316 stainless steel with outer diameters of 6mm and 8mm respectively.

[0017] Furthermore, all piping components are digitized, achieving a high degree of automation and intelligence through computers.

[0018] Furthermore, the intake gas is kept at a constant temperature in a constant temperature gas tank, which is controlled by a water bath and connected to a digital pressure gauge to control the gas pressure inside the tank.

[0019] Furthermore, after the intake gas is kept at a constant temperature, its flow rate is precisely controlled by various mass flow meters to achieve precise control of the mixed gas components and flow rate, and it needs to be fully mixed through a gas mixing tank.

[0020] Another aspect of this invention discloses a method for an intelligent control gas path system to study the combustion, explosion, and diffusion laws of multiphase mixed gases. The method involves performing a gas diffusion process, and the specific experimental steps are as follows.

[0021] 1) The test personnel input the air intake parameters into the control computer (5). The control computer (5) outputs an opening signal to the pressure reducing valve (2-1), pressure reducing valve (2-2), pressure reducing valve (2-3), pressure reducing valve (2-4), ball valve (6-1), ball valve (6-2), ball valve (6-3), and ball valve (6-4). The gas begins to enter the constant temperature gas tank (3-1), constant temperature gas tank (3-2), constant temperature gas tank (3-3), and constant temperature gas tank (3-4) from the gas cylinder (1-1), gas cylinder (1-2), gas cylinder (1-3), and gas cylinder (1-4). 4) Digital pressure gauges (7-1), (7-2), (7-3), and (7-4) receive gas pressure signals and output pressure feedback signals to the control computer (5). The control computer (5) receives the signal and determines whether the gas in the tank has reached the set value. After reaching the set value, it outputs a closing signal to the pressure reducing valve (2-1), (2-2), (2-3), (2-4), (6-1), (6-2), (6-3), and (6-4).

[0022] 2) Input the gas constant temperature into the control computer (5), and the control computer (5) outputs a temperature signal to the water bath, and the gas begins to be kept at a constant temperature;

[0023] 3) After the gas reaches a constant temperature, the mixing ratio and flow rate of the test gas components are input into the control computer (5), and control signals are output to ball valves (8-1), (8-2), (8-3), (8-4), (8-5), (8-6), mass flow meter (9-1), (9-2), and (9-3). After receiving the signals, the mass flow meter (9-1), (9-2), and (9-3) control the flow rate of each component gas and the components entering the gas mixing tank (13), and send a signal to the control computer (5) indicating that the gas delivery is complete. After the control computer (5) judges the signal, it outputs a closing signal to ball valves (8-1), (8-2), (8-3), (8-4), (8-5), (8-6), (9-1), (9-2), and (9-3).

[0024] 4) After the gas is mixed evenly, input the test pre-ventilation command into the control computer (5), open the ball valve (10-1) and ball valve (10-2), and the gas flows into the test tank body (14) so ​​that the pipeline between the gas mixing tank (13) and the test tank body (14) is filled with test gas. Then close the ball valve (10-1) and ball valve (10-2).

[0025] 5) After the pre-ventilation is completed, input the start test command into the control computer (5), open the ball valve (10-1) and ball valve (10-2), and the gas flows into the test tank body (14). At this time, relevant test data will be collected.

[0026] 6) After the test is completed, input the end test command into the control computer (5) and close the ball valve (10-1) and ball valve (10-2).

[0027] 7) Input the gas washing command for the main body of the test tank (14); turn on the vacuum pump (15) and use the ball valve (11-4) and ball valve (11-5) to evacuate the test tank and send the gas to the spray tower (16). After evacuation, open the ball valve (10-2) to introduce air to atmospheric pressure; repeat the above operation three times to complete the gas washing.

[0028] 8) Change the temperature and gas parameters and conduct the next test;

[0029] 9) After all tests are completed, issue a shutdown command and purge the constant temperature tank and the test tank respectively;

[0030] 10) Wash the test tank. Turn on the vacuum pump (15) and use the ball valve (11-4) and ball valve (11-5) to evacuate the test tank. Send the gas to the spray tower (16). After evacuation, open the ball valve (10-2) to introduce air to atmospheric pressure. Repeat the above operation three times to complete the washing.

[0031] 11) Clean the constant temperature tank. Turn on the vacuum pump (15) and evacuate the constant temperature tank through ball valves (11-1), (11-2), and (11-3). Send the gas to the spray tower (16). After the digital pressure gauges (7-1), (7-2), (7-3), and (7-4) report that the vacuum has been evacuated, open ball valves (12-1), (12-2), (12-3), and (12-4) to introduce air to atmospheric pressure. Repeat the above operation three times to complete the cleaning.

[0032] 12) The system shuts down all components and performs a self-check to ensure that all components are in the off state.

[0033] The present invention has the following advantages:

[0034] 1. This invention takes into account the combustion, explosion and diffusion studies of multiphase gas mixtures and is applicable to the study of multi-component gases.

[0035] 2. In this invention, the gas flow in all pipelines is controlled by a computer, and the ball valves, pressure reducing valves and other components are all digital models, realizing a high degree of automation and intelligence in the gas research system's gas intake, mixing and exhaust gas treatment.

[0036] 3. This invention achieves precise control of the components and flow rate of the mixed gas by controlling the computer and mass flow meter, and can be used to study the diffusion and combustion and explosion laws of different components. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall system.

[0038] Figure 2 Flowchart of the system test air intake.

[0039] Figure 3 This is a flowchart of the system test gas washing process.

[0040] Among them, air cylinder 1-1, gas cylinder 1-2, gas cylinder 1-3, gas cylinder 1-4, pressure reducing valve 2-1, pressure reducing valve 2-2, pressure reducing valve 2-3, pressure reducing valve 2-4, constant temperature gas tank 3-1, constant temperature gas tank 3-2, constant temperature gas tank 3-3, constant temperature gas tank 3-4, water bath 4, control computer 5, ball valve 6-1, ball valve 6-2, ball valve 6-3, ball valve 6-4, digital pressure gauge 7-1, digital pressure gauge 7-2, digital pressure gauge 7-3, digital pressure gauge 7-4, ball valve 8- 1. Ball valves 8-2, 8-3, 8-4, 8-5, and 8-6; mass flow meters 9-1, 9-2, and 9-3; ball valves 10-1, 10-2, 11-1, 11-2, 11-3, 11-4, 11-5, 12-1, 12-2, 12-3, and 12-4; gas mixing tank 13; test tank body 14; vacuum pump 15; and spray tower 16. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings.

[0042] A smart control gas path system for studying the combustion, explosion, and diffusion laws of multiphase mixed gases, the system includes

[0043] Includes air cylinder 1-1, gas cylinder 1-2, gas cylinder 1-3, gas cylinder 1-4, pressure reducing valve 2-1, pressure reducing valve 2-2, pressure reducing valve 2-3, pressure reducing valve 2-4, constant temperature gas tank 3-1, constant temperature gas tank 3-2, constant temperature gas tank 3-3, constant temperature gas tank 3-4, water bath 4, control computer 5, ball valve 6-1, ball valve 6-2, ball valve 6-3, ball valve 6-4, digital pressure gauge 7-1, digital pressure gauge 7-2, digital pressure gauge 7-3, digital pressure gauge 7-4, ball valve 8-1 Ball valves 8-2, 8-3, 8-4, 8-5, 8-6; mass flow meter 9-1, 9-2, 9-3; ball valve 10-1, 10-2, 11-1, 11-2, 11-3, 11-4, 11-5, 12-1, 12-2, 12-3, 12-4; gas mixing tank 13; test tank body 14; vacuum pump 15; and spray tower 16;

[0044] The main body 14 of the experimental vessel is made of titanium alloy, with dimensions of 460mm × 420mm × 830mm (length × width × height). A viewing window, measuring 300mm × 600mm × 15mm (length × width × thickness), is located at the center front and back and is made of high-transparency quartz glass. M20×1.5 and M8×1 threaded holes are located on the side walls of the main body 14. The constant temperature gas tanks 3-1, 3-2, 3-3, and 3-4, and the water bath 4 constitute a gas constant temperature system. The control computer 5, ball valves 6-1, 6-2, 6-3, and 6-4, digital pressure gauges 7-1, 7-2, 7-3, and 7-4, ball valves 8-1, 8-2, 8-3, 8-4, 8-5, and 8-6, and mass flow meters 9-1, 9-2, and 9-3 together constitute a mixed gas parameter control system. The control computer 5 outputs control signals to mass flow meters 9-1, 9-2, and 9-3 via software. Upon receiving these signals, the mass flow meters control the flow rate of each component gas and the flow of each component into the gas mixing tank 13. After thorough mixing, the gas flows into the device through the inlet pipe. This system can be used to conduct combustion, explosion, and diffusion tests on various component gases. All piping components are digitally integrated, achieving a high degree of automation and intelligence through computer control. The system can change the temperature parameters of the test gas. The water bath 4 can be set to different constant temperatures, controlled by the control computer 5. Constant temperature gas tanks 3-1, 3-2, 3-3, and 3-4 are placed inside the water bath to provide a constant temperature environment for different gases.

[0045] Taking the gas diffusion process as an example, the specific experimental steps are as follows.

[0046] 1) The test personnel input the air intake parameters into the control computer 5. The control computer 5 outputs an open signal to the pressure reducing valves 2-1, 2-2, 2-3, 2-4, ball valves 6-1, 6-2, 6-3, and 6-4. Gas begins to flow from gas cylinders 1-1, 1-2, 1-3, and 1-4 into the constant temperature gas tanks 3-1, 3-2, 3-3, and 3-4. Digital pressure gauges 7-1, 7-2, 7-3, and 7-4 receive the gas pressure signal and output a pressure feedback signal to the control computer 5. The control computer 5 receives the signal and determines whether the gas in the tank has reached the set value. If the set value is reached, it outputs a close signal to the pressure reducing valves 2-1, 2-2, 2-3, 2-4, ball valves 6-1, 6-2, 6-3, and 6-4.

[0047] 2) Input the gas constant temperature into the control computer 5, and the control computer 5 outputs a temperature signal to the water bath, and the gas begins to maintain a constant temperature;

[0048] 3) After the gas reaches a constant temperature, the mixing ratio and flow rate of the test gas components are input into the control computer 5. The control computer 5 outputs control signals to ball valves 8-1, 8-2, 8-3, 8-4, 8-5, 8-6, and mass flow meters 9-1, 9-2, and 9-3. After receiving the signals, mass flow meters 9-1, 9-2, and 9-3 control the flow rate of each component gas and the entry of the components into the gas mixing tank 13. They also send a signal to the control computer 5 indicating that the gas delivery is complete. After judging the signal, the control computer 5 outputs a shut-off signal to ball valves 8-1, 8-2, 8-3, 8-4, 8-5, 8-6, and mass flow meters 9-1, 9-2, and 9-3.

[0049] 4) After the gas is mixed evenly, input the test pre-ventilation command into the control computer 5, open the ball valve 10-1 and ball valve 10-2, and the gas flows into the test tank body 14, so that the pipeline between the gas mixing tank 13 and the test tank body 14 is filled with test gas, and close the ball valve 10-1 and ball valve 10-2.

[0050] 5) After the pre-ventilation is completed, input the start test command into the control computer 5, open ball valve 10-1 and ball valve 10-2, and the gas flows into the test tank body 14. At this time, relevant test data will be collected.

[0051] 6) After the test is completed, input the end test command into the control computer 5 and close ball valves 10-1 and 10-2;

[0052] 7) Input the gas washing command into the test tank body 14; turn on the vacuum pump 15 to evacuate the test tank through ball valves 11-4 and 11-5, and send the gas to the spray tower 16. After evacuation, open ball valve 10-2 to introduce air to atmospheric pressure; repeat the above operation three times to complete the gas washing.

[0053] 8) Change the temperature and gas parameters and conduct the next test;

[0054] 9) After all tests are completed, issue a shutdown command and purge the constant temperature tank and the test tank respectively;

[0055] 10) Gas washing of the test tank: turn on vacuum pump 15 and use ball valves 11-4 and 11-5 to evacuate the test tank. Send the gas to spray tower 16. After evacuation, open ball valve 10-2 to introduce air to atmospheric pressure. Repeat the above operation three times to complete the gas washing.

[0056] 11) Gas purging in the constant temperature tank: Turn on vacuum pump 15 and evacuate the constant temperature tank through ball valves 11-1, 11-2, and 11-3. Send the gas to spray tower 16. After digital pressure gauges 7-1, 7-2, 7-3, and 7-4 provide feedback that a vacuum has been evacuated, open ball valves 12-1, 12-2, 12-3, and 12-4 to introduce air to atmospheric pressure. Repeat the above operation three times to complete the gas purging.

[0057] 12) The system shuts down all components and performs a self-check to ensure that all components are in the off state.

Claims

1. A gas path system for multiphase mixed combustible gas diffusion test, characterized in that: The air intake system consists of air cylinder (1-1), gas cylinder (1-2), gas cylinder (1-3), gas cylinder (1-4), pressure reducing valve (2-1), pressure reducing valve (2-2), pressure reducing valve (2-3), and pressure reducing valve (2-4); The constant temperature gas tank (3-1), constant temperature gas tank (3-2), constant temperature gas tank (3-3), constant temperature gas tank (3-4), and water bath (4) constitute a gas constant temperature system; The control computer (5), ball valves (6-1), (6-2), (6-3), (6-4), digital pressure gauges (7-1), (7-2), (7-3), (7-4), ball valves (8-1), (8-2), (8-3), (8-4), (8-5), (8-6), mass flow meters (9-1), (9-2), and (9-3) together constitute the mixed gas parameter control system; The air scrubbing system consists of ball valves (11-1), (11-2), (11-3), (11-4), (11-5), (12-1), (12-2), (12-3), (12-4), vacuum pump (15), and spray tower (16). Among them, the control computer (5) outputs control signals to the pressure reducing valve (2-1), pressure reducing valve (2-2), pressure reducing valve (2-3), pressure reducing valve (2-4), ball valve (6-1), ball valve (6-2), ball valve (6-3), and ball valve (6-4) to control the valve opening and closing; Digital pressure gauges (7-1), (7-2), (7-3), and (7-4) send pressure signals to the control computer (5). Upon receiving the signals, the control computer (5) determines whether the gas in the gas pipeline has reached the set value. After completing the gas intake, it outputs control signals to the pressure reducing valves (2-1), (2-2), (2-3), (2-4), (6-1), (6-2), (6-3), and (6-4) to control the valve opening and closing. The control computer (5) outputs control signals to ball valves (8-1), (8-2), (8-3), (8-4), (8-5), (8-6), mass flow meter (9-1), (9-2), and (9-3). After receiving the signals, the mass flow meter (9-1), (9-2), and (9-3) control the flow rate of each component gas and the component entering the gas mixing tank (13), and send a signal to the control computer (5) indicating that the gas delivery is complete. After judging, the control computer (5) outputs a shut-off signal to ball valves (8-1), (8-2), (8-3), (8-4), (8-5), (8-6), (9-1), (9-2), and (9-3). After the gas is fully mixed, the control computer (5) opens the ball valve (10-1) and the ball valve (10-2), and the gas flows into the main body (14) of the test tank. After the simulated gas intake is completed, the ball valve (10-1) and the ball valve (10-2) are closed. The vacuum pump (15) is connected to the constant temperature gas tank (3-1), constant temperature gas tank (3-2), constant temperature gas tank (3-3), constant temperature gas tank (3-4), test tank body (14), and spray tower (16) through ball valve (11-1), ball valve (11-2), ball valve (11-3), ball valve (11-4), and ball valve (11-5) to achieve vacuuming and gas washing inside the tank.

2. The gas path system for multiphase mixed combustible gas diffusion test according to claim 1, characterized in that: The main body of the test tank (14) is made of titanium alloy, with a length × width × height of 460mm × 420mm × 830mm. There is a viewing window in the center, with a size of length × width × thickness of 300mm × 600mm × 15mm. It is made of high-transparency quartz glass. The side wall of the main body of the experimental device (14) has M20×1.5 and M8×1 threaded holes.

3. The gas path system for multiphase mixed combustible gas diffusion test according to claim 1, characterized in that: All gas lines are made of 316 stainless steel, with outer diameters of 6mm and 8mm respectively.

4. The gas path system for multiphase mixed combustible gas diffusion test according to claim 1, characterized in that: All piping components are digitalized, achieving a high degree of automation and intelligence through computers.

5. The gas path system for multiphase mixed combustible gas diffusion test according to claim 1, characterized in that: The intake gas is kept at a constant temperature in a constant temperature gas tank, which is controlled by a water bath and connected to a digital pressure gauge to control the gas pressure inside the tank.

6. The gas path system for multiphase mixed combustible gas diffusion test according to claim 1, characterized in that: After the intake gas is kept at a constant temperature, its flow rate is precisely controlled by various mass flow meters to achieve precise control of the mixed gas components and flow rate, and it needs to be fully mixed through a gas mixing tank.

7. A method using the multiphase mixed combustible gas diffusion test gas path system according to any one of claims 1-6, characterized in that: The specific experimental steps for conducting the gas diffusion process are as follows. 1) The test personnel input the air intake parameters into the control computer (5). The control computer (5) outputs an opening signal to the pressure reducing valve (2-1), pressure reducing valve (2-2), pressure reducing valve (2-3), pressure reducing valve (2-4), ball valve (6-1), ball valve (6-2), ball valve (6-3), and ball valve (6-4). The gas begins to enter the constant temperature gas tank (3-1), constant temperature gas tank (3-2), constant temperature gas tank (3-3), and constant temperature gas tank (3-4) from the gas cylinder (1-1), gas cylinder (1-2), gas cylinder (1-3), and gas cylinder (1-4). 4) Digital pressure gauges (7-1), (7-2), (7-3), and (7-4) receive gas pressure signals and output pressure feedback signals to the control computer (5). The control computer (5) receives the signal and determines whether the gas in the tank has reached the set value. After reaching the set value, it outputs a closing signal to the pressure reducing valve (2-1), (2-2), (2-3), (2-4), (6-1), (6-2), (6-3), and (6-4). 2) Input the gas constant temperature into the control computer (5), and the control computer (5) outputs a temperature signal to the water bath, and the gas begins to be kept at a constant temperature; 3) After the gas reaches a constant temperature, the mixing ratio and flow rate of the test gas components are input into the control computer (5), and control signals are output to ball valves (8-1), (8-2), (8-3), (8-4), (8-5), (8-6), mass flow meter (9-1), (9-2), and (9-3). After receiving the signals, the mass flow meter (9-1), (9-2), and (9-3) control the flow rate of each component gas and the components entering the gas mixing tank (13), and send a signal to the control computer (5) indicating that the gas delivery is complete. After the control computer (5) judges the signal, it outputs a closing signal to ball valves (8-1), (8-2), (8-3), (8-4), (8-5), (8-6), (9-1), (9-2), and (9-3). 4) After the gas is mixed evenly, input the test pre-ventilation command into the control computer (5), open the ball valve (10-1) and ball valve (10-2), and the gas flows into the test tank body (14) so ​​that the pipeline between the gas mixing tank (13) and the test tank body (14) is filled with test gas. Then close the ball valve (10-1) and ball valve (10-2). 5) After the pre-ventilation is completed, input the start test command into the control computer (5), open the ball valve (10-1) and ball valve (10-2), and the gas flows into the test tank body (14). At this time, relevant test data will be collected. 6) After the test is completed, input the end test command into the control computer (5) and close the ball valve (10-1) and ball valve (10-2). 7) Input the gas washing command for the main body of the test tank (14); turn on the vacuum pump (15) and use the ball valve (11-4) and ball valve (11-5) to evacuate the test tank and send the gas to the spray tower (16). After evacuation, open the ball valve (10-2) to introduce air to atmospheric pressure; repeat the above operation three times to complete the gas washing. 8) Change the temperature and gas parameters and conduct the next test; 9) After all tests are completed, issue a shutdown command and purge the constant temperature tank and the test tank respectively; 10) Wash the test tank. Turn on the vacuum pump (15) and use the ball valve (11-4) and ball valve (11-5) to evacuate the test tank. Send the gas to the spray tower (16). After evacuation, open the ball valve (10-2) to introduce air to atmospheric pressure. Repeat the above operation three times to complete the washing. 11) Clean the constant temperature tank. Turn on the vacuum pump (15) and evacuate the constant temperature tank through ball valves (11-1), (11-2), and (11-3). Send the gas to the spray tower (16). After the digital pressure gauges (7-1), (7-2), (7-3), and (7-4) report that the vacuum has been evacuated, open ball valves (12-1), (12-2), (12-3), and (12-4) to introduce air to atmospheric pressure. Repeat the above operation three times to complete the cleaning. 12) The system shuts down all components and performs a self-check to ensure that all components are in the off state.

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