Experimental device of hydrogen gas leakage from high pressure, spontaneous flame and dust explosion in hoist

Abstract

The utility model provides experimental apparatus of high pressure hydrogen leakage spontaneous combustion flame hoist dust explosion, including the gas supply system, high pressure storage tank, visual straight pipe, downstream explosion box and dust spraying system, data acquisition control system that are connected in proper order, the gas supply system provides high pressure gas for high pressure storage tank, and high pressure storage tank communicates with downstream explosion box through visual straight pipe, and dust spraying system communicates with downstream explosion box through pipeline, the pressure sensor, photoelectric sensor, temperature sensor and dust spraying system, gas supply system are connected with data acquisition control system communication respectively. The utility model has the advantages of: simple structure design can simulate the explosion phenomenon caused by spontaneous combustion flame and initiate dust hoist, thereby obtains various parameters of spontaneous combustion explosion.

Description

Technical Field

[0001] This utility model relates to the field of shock wave dust secondary explosion technology, specifically to an experimental device for high-pressure hydrogen leakage spontaneous combustion flame dust explosion. Background Technology

[0002] High-pressure hydrogen can spontaneously combust when released into pipelines, which is a critical safety issue that needs to be addressed in the development of hydrogen energy applications.

[0003] In real-world scenarios, the venting is often carried out in a confined space. The localized spontaneous combustion flame can cause dust to be stirred up and lead to an explosion. However, there is currently no experimental device that can study the relevant explosion parameters. Utility Model Content

[0004] The purpose of this invention is to provide an experimental device for high-pressure hydrogen leakage spontaneous combustion flame dust explosion that is simple in structure, can simulate the explosion phenomenon caused by dust swirling caused by spontaneous combustion flame, and can realize the measurement of spontaneous combustion flame parameters.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] An experimental apparatus for detecting spontaneous combustion of high-pressure hydrogen gas and dust explosion caused by a flame is provided, comprising a gas supply system, a high-pressure storage tank, a visualization straight pipe, a downstream explosion chamber, a dust spraying system, and a data acquisition and control system connected in sequence. The gas supply system provides high-pressure gas to the high-pressure storage tank, which is connected to the downstream explosion chamber via the visualization straight pipe. The dust spraying system is also connected to the downstream explosion chamber via a pipeline. The downstream explosion chamber is equipped with pressure sensors, and the visualization straight pipe is equipped with pressure sensors and photoelectric sensors. The pressure sensors, photoelectric sensors, dust spraying system, and gas supply system are all communicatively connected to the data acquisition and control system.

[0007] Furthermore, there are several downstream explosion boxes, each connected to a high-pressure storage tank via several visible straight pipes.

[0008] Furthermore, the downstream explosion box has transparent windows on the front and rear sides, pressure sensors are installed on the upper side, a straight viewing pipe is connected to the left or right side, and the right or left side is open and covered with PVC film.

[0009] Furthermore, a venting membrane is provided at the outlet of the high-pressure storage tank, and a striking pin is provided at the flange connection between the high-pressure storage tank and the visible straight pipe, which can puncture the venting membrane.

[0010] Furthermore, the gas supply system includes a gas cylinder, a booster pump, and a vacuum pump. The booster pump is connected to the gas cylinder and the high-pressure storage tank via pipelines, and the vacuum pump is connected to the high-pressure storage tank via pipelines. Each pipeline is equipped with a check valve.

[0011] Furthermore, the dust spraying system includes a dust storage tank, a dust storage control start valve, a compressed air cylinder, and an inflation control valve. The compressed air cylinder supplies air to the dust storage tank through an inflation pipeline, which is regulated by the inflation control valve. The dust storage tank transports dust to the downstream explosion box through a dust conveying pipeline, which is regulated by the dust storage control start valve.

[0012] Furthermore, a flow regulator is provided at the outlet of the compressed gas cylinder.

[0013] Furthermore, the high-pressure storage tank is equipped with a pressure sensor and a temperature sensor.

[0014] Furthermore, the data acquisition and control system includes a high-speed camera, a data acquisition card, and a computer. The high-speed camera is used to capture the explosion process of the downstream explosion box, and the data acquisition card is used to acquire signal data from various pressure sensors or photoelectric sensors.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] This utility model presents an experimental device for simulating the explosion of dust caused by spontaneous combustion of high-pressure hydrogen gas. The device has a simple structural design and can simulate the explosion phenomenon caused by dust swirling due to spontaneous combustion. It can measure the parameters of spontaneous combustion flame, visualize the downstream explosion box, and study the flame parameters of branch pipelines. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0018] Figure 2 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0019] Reference numerals: 11. Gas cylinder; 12. Booster pump; 13. Vacuum pump; 14. Check valve; 2. High-pressure storage tank; 21. Relief membrane; 22. Impact pin; 23. Pressure sensor three; 24. Temperature sensor; 3. Visualized straight pipe; 31. Pressure sensor two; 32. Photoelectric sensor; 4. Downstream explosion box; 41. Pressure sensor one; 42. Membrane; 51. Dust storage tank; 52. Dust storage control start valve; 53. Compressed gas cylinder; 54. Inflation control valve; 55. Flow regulator; 61. High-speed camera; 62. Data acquisition card; 63. Computer. Detailed Implementation

[0020] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings. Example

[0021] like Figure 1As shown, the experimental apparatus for a high-pressure hydrogen leak spontaneous combustion flame dust explosion includes a gas supply system, a high-pressure storage tank 2, a visualization straight pipe 3, a downstream explosion box 4, a dust spraying system, and a data acquisition and control system connected in sequence. The gas supply system provides high-pressure gas to the high-pressure storage tank 2, which is connected to the downstream explosion box 4 via the visualization straight pipe 3. The dust spraying system is also connected to the downstream explosion box 4 via a pipeline. The downstream explosion box 4 is equipped with a pressure sensor 41, and the visualization straight pipe 3 is equipped with a pressure sensor 31 and a photoelectric sensor 32. The pressure sensors, photoelectric sensors, dust spraying system, and gas supply system are all communicatively connected to the data acquisition and control system.

[0022] The downstream explosion box 4 has transparent windows on the front and back sides, made of tempered glass, which can be used to observe the explosion process. Pressure sensors 41 are installed on the upper side, with three pressure sensors 41 arranged at equal intervals to fully sense the pressure changes in the downstream explosion box 4 during the explosion. The left or right side is connected to the visualization straight pipe 3, and the corresponding right or left side is open and glued with a PVC film 42. The film 42 will be blown open by the shock wave after the explosion, forming an open space, which is a disposable consumable.

[0023] The high-pressure storage tank 2 is equipped with a venting membrane 21 at its outlet, and a striking pin 22 is provided at the flange connection between the high-pressure storage tank 2 and the visible straight pipe 3. The striking pin 22 can puncture the venting membrane 21. When the gas supply system fills the high-pressure storage tank 2 with gas, as the gas pressure rises, the venting membrane 21 bulges outward and touches the striking pin 22, at which point the striking pin 22 can puncture the venting membrane 21.

[0024] The gas supply system includes a gas cylinder 11, a booster pump 12, and a vacuum pump 13. The booster pump 12 is connected to the gas cylinder 11 and the high-pressure storage tank 2 through pipelines, and the vacuum pump 13 is connected to the high-pressure storage tank 2 through pipelines. Each pipeline is equipped with a check valve 14.

[0025] The dust spraying system includes a dust storage tank 51, a dust storage control start valve 52, a compressed air cylinder 53, and an air filling control valve 54. The dust storage tank 51 is used to store dry powder. The compressed air cylinder 53 is equipped with a flow regulator 55 at its outlet. The compressed air cylinder 53 supplies air to the dust storage tank 51 through an air filling pipeline, which is regulated by the air filling control valve 54. The dust storage tank 51 supplies dust to the downstream explosion box 4 through a dust conveying pipeline, which is regulated by the dust storage control start valve 52.

[0026] The high-pressure storage tank 2 is equipped with a pressure sensor 23 and a temperature sensor 24, which are respectively connected to the data acquisition and control system.

[0027] The data acquisition and control system includes a high-speed camera 61, a data acquisition card 62, and a computer 63. The high-speed camera 61 is used to capture the explosion process of the downstream explosion box 4, and the data acquisition card 62 is used to acquire signal data from various pressure sensors or photoelectric sensors. The computer 63 stores, processes, and analyzes the data received from the data acquisition card 62 or the high-speed camera 61.

[0028] The working principle of this utility model is as follows: S1) First, install the venting membrane 21 at the outlet of the high-pressure storage tank 2, turn on the vacuum pump 13 to evacuate the high-pressure storage tank 2, and then close the valve; S2) Unscrew the dust storage tank 51, put in an appropriate amount of dry powder, and tighten the dust storage tank 51; S3) Place the dust from the dust storage tank 51 into the downstream explosion box 4 through the dust spraying system and pipeline, and fix the PVC film 42; S4) After confirming that the high-pressure storage tank 2 is leak-proof, fill it with combustible gas according to the experimental plan, and use the booster pump 12 to pump the gas into the tank. Inflation causes the internal pressure of the high-pressure storage tank 2 to rise continuously. Once the target pressure is reached, the striker 22 at the flange connection automatically punctures the relief membrane 21. (S5) Simultaneously with the striker 22's action, the booster pump 12 stops operating, and the high-speed camera 61 begins recording the explosion state of the downstream explosion box 4, automatically spraying dust or liquid mist, and recording pressure data and high-speed image data. (S6) After the experiment is completed, the relief membrane 21 and the punctured PVC film 42 are removed, and new relief membrane 21 and PVC film 42 are installed to prepare for the next experiment. Example

[0029] like Figure 2 As shown, based on Example 1, there are three downstream explosion boxes 4, and correspondingly, there are also three visualization straight pipes 3. The three downstream explosion boxes 4 are connected to the same high-pressure storage tank 2 through visualization straight pipes 3, so as to simulate and observe the explosion phenomenon caused by dust swirling caused by multiple spontaneous combustion flames.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An experimental apparatus for detecting spontaneous combustion of high-pressure hydrogen gas and dust explosion caused by flame convection, characterized in that: The system includes a gas supply system, a high-pressure storage tank, a visual straight pipe, a downstream explosion chamber, a dust spraying system, and a data acquisition and control system, all connected in sequence. The gas supply system provides high-pressure gas to the high-pressure storage tank, which is connected to the downstream explosion chamber via the visual straight pipe. The dust spraying system is also connected to the downstream explosion chamber via a pipeline. The downstream explosion chamber is equipped with pressure sensors, and the visual straight pipe is equipped with pressure sensors and photoelectric sensors. The pressure sensors, photoelectric sensors, dust spraying system, and gas supply system are all communicatively connected to the data acquisition and control system.

2. The experimental apparatus for detecting high-pressure hydrogen leakage, spontaneous combustion, and dust explosion by a convection flame, as described in claim 1, is characterized in that: The downstream explosion boxes consist of several units, each connected to a high-pressure storage tank via several visible straight pipes.

3. The experimental apparatus for detecting high-pressure hydrogen leakage, spontaneous combustion, and dust explosion according to claim 1 or 2, characterized in that: The downstream explosion box has transparent windows on the front and back sides, pressure sensors are installed on the upper side, and a straight pipe for visualization is connected to the left or right side. The right or left side is open and covered with PVC film.

4. The experimental apparatus for detecting high-pressure hydrogen leakage, spontaneous combustion, and dust explosion according to claim 3, characterized in that: The high-pressure storage tank is equipped with a venting membrane at its outlet, and a striker is provided at the flange connection between the high-pressure storage tank and the visible straight pipe. The striker can puncture the venting membrane.

5. The experimental apparatus for detecting high-pressure hydrogen leakage, spontaneous combustion, and dust explosion according to claim 1, characterized in that: The gas supply system includes a gas cylinder, a booster pump, and a vacuum pump. The booster pump is connected to the gas cylinder and the high-pressure storage tank through pipelines, and the vacuum pump is connected to the high-pressure storage tank through pipelines. Each pipeline is equipped with a check valve.

6. The experimental apparatus for detecting high-pressure hydrogen leakage, spontaneous combustion, and dust explosion according to claim 1, characterized in that: The dust spraying system includes a dust storage tank, a dust storage control start valve, a compressed air cylinder, and an air filling control valve. The compressed air cylinder supplies air to the dust storage tank through an air filling pipeline, which is regulated by the air filling control valve. The dust storage tank transports dust to the downstream explosion box through a dust conveying pipeline, which is regulated by the dust storage control start valve.

7. The experimental apparatus for detecting high-pressure hydrogen leakage, spontaneous combustion, and dust explosion according to claim 6, characterized in that: A flow regulator is installed at the outlet of the compressed gas cylinder.

8. The experimental apparatus for detecting spontaneous combustion of high-pressure hydrogen gas and dust explosion caused by flame convection according to claim 1, characterized in that: The high-pressure storage tank is equipped with pressure sensors and temperature sensors.

9. The experimental apparatus for detecting high-pressure hydrogen leakage, spontaneous combustion, and dust explosion according to claim 1, 2, or 8, characterized in that: The data acquisition and control system includes a high-speed camera, a data acquisition card, and a computer. The high-speed camera is used to capture the explosion process of the downstream explosion box, and the data acquisition card is used to acquire signal data from various pressure sensors or photoelectric sensors.

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