Testing device for testing detonation process of pure hydrogen hydrogen-doped methane

Abstract

The invention discloses a test device for testing the detonation process of pure hydrogen hydrogen-doped methane, and relates to the field of combustible gas explosion safety, and the device mainly comprises a driving section pipeline, an anti-explosion sealing test box, an ignition system, a discharge section pipeline and a data acquisition system. The driving section is used as an ignition place of combustible gas; the explosion-proof sealing test box serves as a detonation generation place, a metal plate, an adjustable moving support and a sliding rail are arranged in the explosion-proof sealing test box, the adjustable moving support is mainly used for adjusting the placing position and angle of the metal plate, the position is changed through the sliding rail at the bottom of the box body, and pressure gauges are installed at the left end and the right end of the box body to record the explosion overpressure condition. A photoelectric sensor is mounted at the upper end of the box to record flame propagation speed; the ignition system is used for ignition of combustible gas, and ignition energy needed by the combustible gas is achieved through electrode discharge so as to achieve ignition of the gas. The discharge section pipeline is used for discharging combusted gas; the method is of great significance for safely carrying out tests.

Description

Technical Field

[0001] The invention belongs to the field of combustion and explosion safety of combustible gases, and in particular relates to a test device for testing the detonation process of pure hydrogen mixed with hydrogen-methane. Background Art

[0002] With the rapid development of hydrogen energy technology, pure hydrogen and hydrogen-blended methane are increasingly used in the energy field. However, the combustion and detonation processes of these fuels are extremely complex and dangerous, and precise experimental equipment is required to study and test key parameters such as their combustion characteristics, detonation pressure, and flame propagation speed.

[0003] At present, some experimental devices have been developed and applied for the detonation process test of pure hydrogen and hydrogen-doped methane. For example, some devices use square cross-section stainless steel explosion pipes, ignite the combustible gas mixture through an electric spark ignition system, and use an experimental data acquisition system to record and analyze the experimental data. These devices meet the basic test requirements to a certain extent, but there are still some shortcomings in terms of accuracy, safety and operability. The accuracy and response speed of key components such as the gas distribution system, pressure sensor, and flame sensor of the existing devices need to be improved. Most experimental devices cannot achieve visualization and record the flame propagation morphology. In addition, due to the complexity of the detonation process, the air tightness, pressure bearing capacity and safety of the experimental device are extremely high, and the existing devices often have certain limitations in these aspects. Therefore, it is particularly important to develop a more accurate, safe and easy-to-operate test device for testing the detonation process of pure hydrogen and hydrogen-doped methane. The present invention can accurately simulate the actual combustion and detonation environment, provide high-precision experimental data, and ensure the safety and operability of the experimental process. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a test device for testing the pure hydrogen / hydrogen-doped methane detonation process based on safety requirements and in combination with the process of hydrogen-doped / pure hydrogen methane detonation. The device can be used to test the key factors of the pure hydrogen / hydrogen-doped methane detonation physical process.

[0005] The present invention provides a test device for testing the detonation process of pure hydrogen mixed with methane, comprising the following five systems:

[0006] 1) Driving section pipeline;

[0007] 2) Explosion-proof sealed test chamber;

[0008] 3) Ignition system;

[0009] 4) Discharge section pipeline;

[0010] 5) Data acquisition system;

[0011] The present invention aims to provide a test device for testing the detonation process of pure hydrogen mixed with methane, so as to solve the deficiencies in the prior art in terms of accuracy, safety and operability.

[0012] The present invention is achieved through the following technical solutions:

[0013] The driving section pipeline (2) is made of stainless steel with an outer diameter of 20 mm and a wall thickness of 3 mm. The driving section pipeline is connected to an ignition electrode after the valve. The driving section pipeline is used to realize the ignition location of the combustible gas.

[0014] The explosion-proof sealed test box is used to isolate the high energy impact generated by the detonation wave and ensure the safety of the pure hydrogen-doped methane detonation test. It includes a pressure and temperature sensor (3) and a photoelectric sensor (4), wherein the pressure sensor is used to record the explosion overpressure data, and the photoelectric sensor is used to record the flame propagation speed. The front and rear sides of the explosion-proof box are provided with visual windows (5) for observing the flame propagation situation. The size of the windows is 300mm×300mm, the thickness is 20mm, and the material is organic glass. The slide rail (6) and the movable bracket (7) are installed in the explosion-proof sealed test box, and the scale (8) is fixed on the outside of the box body to facilitate the determination of the flame propagation distance. The rectangular box body (9) is composed of a size of 500mm×500mm×500mm, a thickness of 10mm, and a material of 304 stainless steel. The movable bracket (7) is fixed with a 300mm×300mm×300mm metal plate (10), and the right end of the box body is connected to the discharge section pipeline (11) for the safe discharge of the gas after combustion.

[0015] The ignition system includes an igniter, an ignition electrode, a high-voltage pulse discharge power supply, a controller, etc. In the test of the pure hydrogen-doped methane detonation process, the igniter needs to have sufficient ignition energy and stability to ensure the accuracy and safety of the test.

[0016] The discharge section pipe (11) is made of stainless steel with an outer diameter of 20 mm and a wall thickness of 3 mm, and a length of 500 mm, and is used to safely discharge the gas generated by combustion after the pure hydrogen-doped methane detonation test.

[0017] As a further technical solution, the adjustable movable bracket arranged in the explosion-proof sealed box of the present invention has the function of adjusting the position and the angle. The 300mm×300mm×300mm metal plate (13) is fixed by bolts (15). The angle is changed by the angle adjustment bracket (14). The position of the pulley (17) under the sliding base (16) is controlled to change the position of the metal plate on the slide rail (18) at the bottom of the box. The transition conditions from deflagration to detonation are explored by changing the flame propagation distance.

[0018] As a further technical solution, the visible windows (5) on both sides of the explosion-proof sealed box body of the present invention should be made of a transparent material that is resistant to high temperature and high pressure and has a certain impact resistance.

[0019] As a further technical solution, there is no special restriction on the connection method between all the experimental devices described in the present invention, but if the connection is located in an explosion-proof sealed box, the connection should be sealed and strengthened to avoid affecting the experimental results.

[0020] The present invention adopts the above technical solution, and can achieve the following beneficial effects:

[0021] 1) In the present invention, the detonation wave generated by hydrogen or hydrogen-doped methane can be isolated through an explosion-proof sealing test to ensure the safety of the test. Therefore, the device of the present invention has the safety conditions for carrying out pure hydrogen and hydrogen-doped methane detonation tests.

[0022] 2) The present invention can explore the influence of multiple factors on the detonation of pure hydrogen / hydrogen-doped methane; this device can not only study the transition mechanism from deflagration to detonation, but also analyze the influence of various factors such as the position and angle of obstacles on the detonation of pure hydrogen / hydrogen-doped methane.

[0023] 3) The present invention can explore the conditions for spontaneous combustion of hydrogen-doped methane; this device can explore the effects of hydrogen doping ratio, pressure, temperature, etc. on the spontaneous combustion of hydrogen-doped methane, and study the possible conditions for spontaneous combustion of hydrogen-doped methane.

[0024] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 The present invention is a flow chart of an experimental device for testing the detonation process of pure hydrogen mixed with methane.

[0028] 1 ignition electrode, 2 driving section pipeline, 3 pressure temperature sensor, 4 photoelectric sensor, 5 visual window, 6 slide rail, 7 adjustable mobile bracket, 8 scale, 9 explosion-proof sealing test box, 10 metal plate, 11 discharge section pipeline, 12 igniter

[0029] Figure 2 It is a schematic diagram of the structure of an adjustable movable bracket in an explosion-proof sealed box.

[0030] 13 metal plate, 14 angle adjustment bracket, 15 bolt, 16 sliding base, 17 pulley, 18 slide rail. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] 1) If Figure 1 The test device for the pure hydrogen-methane detonation process shown in the figure fixes the metal plate (10) in the explosion-proof sealed box on the adjustable movable bracket (7) according to the pre-set working conditions;

[0035] 2) Check the sealing performance of the explosion-proof sealed box, the availability of the pressure and temperature sensor (3) and the photoelectric sensor (4), and whether the data acquisition system is operating normally. Proceed to the next step when each channel is operating normally.

[0036] 3) Turn on the data acquisition system to collect data and start the pure hydrogen-methane detonation test;

[0037] 4) Fill the driving section pipeline with the mixed gas and close the valve. The ignition electrode (1) is controlled to discharge by the igniter (12) to ignite the combustible gas. The data acquisition system records the pressure and temperature changes of the test. During the test, pay close attention to the changes in parameters such as pressure and temperature displayed by the data acquisition system, as well as the operation of the test device.

[0038] 5) After the test, the valve on the discharge pipeline is opened, and the combusted gas is discharged from the discharge section pipeline (11).

[0039] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A test device for testing the detonation process of pure hydrogen mixed with methane, characterized by: It includes a driving section pipeline, an explosion-proof sealing test box, an ignition system, a discharge section pipeline and a data acquisition system; the driving section pipeline serves as a passage for gas to enter the explosion-proof sealing test box; the explosion-proof sealing test box serves as the place where detonation occurs; the ignition system is used to ignite the combustible gas; the discharge section pipeline is used as the discharge pipeline for the combustion gas after the test is completed; the data acquisition system is used to collect various data in the test, including pressure, temperature, light signals, etc.

2. A test device for testing the detonation process of pure hydrogen mixed with methane as claimed in claim 1, characterized in that: The explosion-proof sealed test box includes a pressure and temperature sensor (3), a photoelectric sensor (4), a visual window (5), a slide rail (6), a movable bracket (7), a fixed scale (8) on the outside of the box, and a rectangular box (9); wherein the movable bracket (7) in the explosion-proof sealed box has the function of adjusting the position and angle, and the movable bracket is composed of a metal plate (13), an angle adjustment bracket (14), a bolt (15), a sliding base (16), and a pulley (17); the metal plate is fixed on the adjustable movable bracket, and the position of the metal plate is controlled by the slide rail at the bottom of the box, so as to change the flame propagation distance and explore the transition conditions from deflagration to detonation; when the connection is located in the explosion-proof sealed box, the connection should be sealed and strengthened to avoid affecting the experimental results.

3. The working method of the test device for testing the detonation process of pure hydrogen mixed with methane as claimed in claim 1, characterized in that: According to the experimental requirements, a certain obstacle position and angle are selected, that is, the angle adjustment bracket (14) and the sliding base (16) are fixed at a certain angle, and the mixed gas is introduced into the driving section pipeline (2). After stabilization, the ignition electrode (1) is controlled by the igniter (12) to ignite, and the pressure sensor (3) and the photoelectric sensor (4) are used to record the experimental data, and the flame propagation phenomenon is observed through the visual window (5). After the test is completed, the gas is discharged through the discharge pipeline (11).

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