Pressure test safety device for water electrolysis hydrogen production system

Abstract

The embodiment of the utility model discloses a pressure test safety device for a water electrolysis hydrogen production system, which comprises an inert gas system, a gas pressure detection system, water pressure boosting control equipment and an overpressure safety protection device, the gas pressure detection system is connected with a gas pressure pipeline of the water electrolysis hydrogen production equipment; the water pressure detection system is connected with the water pressure boosting control equipment, and the water pressure detection system is connected with a hydraulic pipeline of the water electrolysis hydrogen production equipment; the overpressure safety protection device comprises a safety main pipeline and a plurality of safety branch pipelines connected with the safety main pipeline in parallel, one end of the safety main pipeline is connected with an output pipeline of the water electrolysis hydrogen production equipment, a first control valve is arranged at the other end of the safety main pipeline, and second control valves are arranged on the safety branch pipelines. By adjusting the third control valve on the safety branch pipeline, it can be ensured that the test pressure of the air pressure pipeline is not overpressure, and the test safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by electrolyzing water, in particular to a pressure test safety device for a hydrogen production system by electrolyzing water. Background Art

[0002] Hydrogen production by electrolyzing water is a relatively convenient method for producing hydrogen, that is: direct current is passed through an electrolytic cell filled with electrolyte, and water molecules undergo an electrochemical reaction on the electrodes, decomposing into hydrogen and oxygen. Hydrogen and oxygen have the characteristics of small molecular weight of the medium and are prone to leakage, flammability, and explosiveness. Currently, the testing equipment used is affected by factors such as the reliability of the pressure of the pressurizing equipment and human operation, and there is a possibility that the test pressure in the system exceeds the pressure limit. For example: the water pressure test pressure is 1.5 times the design pressure, and the air pressure test pressure is 1.15 times the design pressure, while the design pressure is generally 1.1 times the working pressure. The test pressure is much greater than the working pressure. If the test pressure exceeds the limit again, it is extremely likely to cause danger. Therefore, it is necessary to design a pressure test safety device for hydrogen production by electrolyzing water. Summary of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides a pressure test safety device for a hydrogen production system by electrolyzing water.

[0004] An embodiment of the present application provides a pressure test safety device for a hydrogen production system by electrolyzing water, including:

[0005] An inert gas system for providing the air pressure required for the pressure test;

[0006] A gas pressure detection system provided between the inert gas system and the hydrogen production equipment by electrolyzing water. The gas pressure detection system is connected to the inert gas system and is also connected to the air pressure pipeline of the hydrogen production equipment by electrolyzing water;

[0007] A water pressure boosting control device for providing the water pressure required for the pressure test;

[0008] A water pressure detection system provided between the water pressure boosting control device and the hydrogen production equipment by electrolyzing water. The water pressure detection system is connected to the water pressure boosting control device and is also connected to the hydraulic pipeline of the hydrogen production equipment by electrolyzing water; and,

[0009] An overpressure safety protection device, which includes a main safety pipeline and a plurality of safety branch pipelines connected in parallel with the main safety pipeline. One end of the main safety pipeline is connected to the output pipeline of the hydrogen production equipment by electrolyzing water, a first control valve is provided at the other end of the main safety pipeline, a second control valve is provided on the safety branch pipeline, and a third control valve is provided at the end of the safety branch pipeline far from the main safety pipeline.

[0010] In one embodiment, the gas pressure detection system includes a first main pipeline, a fourth control valve, a fifth control valve, and a first branch pipeline connected to the first main pipeline. One end of the first main pipeline is connected to the inert gas system, and the other end of the main pipeline is connected to the air pressure pipeline of the electrolytic water hydrogen production equipment. The fourth control valve and the fifth control valve are respectively arranged on the first main pipeline and the first branch pipeline, and a pressure transmitter is arranged at one end of the first branch pipeline away from the first main pipeline.

[0011] In one embodiment, it further includes a first pressure gauge and a second pressure gauge. The first main pipeline is connected to the air pressure pipeline through a first connecting pipe, the first pressure gauge is arranged on the first connecting pipe, the safety main pipeline is connected to the air pressure pipeline through a second connecting pipe, and the second pressure gauge is arranged on the second connecting pipe.

[0012] In one embodiment, the water pressure detection system includes a second main pipeline, a sixth control valve, a third pressure gauge, and a second branch pipeline connected to the second main pipeline. Both ends of the second main pipeline are respectively connected to the water pressure boosting control equipment and the water inlet end of the hydraulic pipeline. The sixth control valve is arranged on the second main pipeline, and the third pressure gauge is arranged at one end of the second branch pipeline away from the second main pipeline.

[0013] In one embodiment, the water pressure boosting control equipment includes a water tank, a booster pump, and a water delivery pipeline. One end of the water delivery pipeline is communicated with the water tank, the other end of the water delivery pipeline is connected to the second main pipeline, and the booster pump is arranged on the water delivery pipeline for pumping the water in the water tank to the second main pipeline and flowing into the hydraulic pipeline for a water pressure test.

[0014] In one embodiment, the water pressure boosting control equipment further includes a pressure reducing valve. The pressure reducing valve is arranged on the water delivery pipeline and behind the booster pump for regulating the water pressure of the water delivery pipeline.

[0015] In one embodiment, it further includes a return water pipeline and a seventh control valve. Both ends of the return water pipeline are respectively communicated with the water tank and the water outlet end of the hydraulic pipeline. The seventh control valve is arranged on the return water pipeline for controlling the on or off of the return water pipeline.

[0016] In one embodiment, the inert gas system includes a nitrogen source and a gas transmission pipeline. Both ends of the gas transmission pipeline are respectively connected to the nitrogen source and the gas pressure detection system.

[0017] In one embodiment, the inert gas system further includes a fourth pressure gauge. The fourth pressure gauge is arranged on the gas transmission pipeline.

[0018] Compared with the prior art, the above technical solution provided by the embodiments of the present application has the following beneficial effects:

[0019] One end of the safety main pipeline is connected to the air pressure pipeline of the electrolytic water hydrogen production equipment, and multiple safety branch pipelines are connected in parallel on the safety main pipeline. The third control valves on each safety branch pipeline are set with different preset test pressures. When the actual test pressure of the system exceeds the preset test pressure, the third control valve will automatically jump and exhaust. According to different test pressures, the second control valve of the corresponding safety branch pipeline is opened, so that when the gas of the inert gas system is introduced into the air pressure pipeline, by performing overpressure relief on the third control valve on the safety branch pipeline, it can be ensured that the test pressure of the air pressure pipeline will not exceed the pressure, ensuring the safety of the test; at the same time, water can also be introduced into the hydraulic pipeline of the electrolytic water hydrogen production equipment through the water pressure boosting control equipment and maintained for a preset duration, and then the water pressure value of the hydraulic pipeline is detected through the water pressure detection system to test whether there is a leakage in the hydraulic pipeline. The structure is simple and the test is convenient, and different types of tests can be realized on the pipelines in the electrolytic water hydrogen production equipment. Description of the Drawings

[0020] Figure 1 is a structural schematic diagram of a pressure test safety device for an electrolytic water hydrogen production system of the present application.

[0021] Reference numerals in the figure:

[0022] 10. Inert gas system; 11. Nitrogen source; 12. Gas transmission pipeline; 13. Fourth pressure gauge; 20. Gas pressure detection system; 21. First main pipeline; 22. First branch pipeline; 23. Fourth control valve; 24. Fifth control valve; 25. Pressure transmitter; 30. Electrolytic water hydrogen production equipment; 40. Overpressure safety protection device; 41. Safety main pipeline; 42. Safety branch pipeline; 43. First control valve; 44. Second control valve; 45. Third control valve; 50. Water pressure detection system; 51. Second main pipeline; 52. Second branch pipeline; 53. Sixth control valve; 54. Third pressure gauge; 60. Water pressure boosting control equipment; 61. Water tank; 62. Water transmission pipeline; 63. Booster pump; 64. Pressure reducing valve; 70. First pressure gauge; 80. Second pressure gauge; 90. First connecting pipe; 100. Second connecting pipe; 110. Return water pipeline; 120. Seventh control valve. Detailed Embodiments

[0023] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the accompanying drawings and are constructed and operated in a specific orientation, and are only for the convenience of describing the present technical solution, rather than indicating that the indicated devices or elements must have a specific orientation, so it should not be construed as a limitation to the present utility model.

[0024] The specific embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0025] Please refer to Figure 1 , the embodiment of the present application provides a pressure test safety device for an electrolytic water hydrogen production system, including: an inert gas system 10, a gas pressure detection system 20, a water pressure boosting control device 60, a water pressure detection system 50, and an overpressure safety protection device 40.

[0026] Specifically, the inert gas system 10 is used to provide the air pressure required for the pressure test. The gas pressure detection system 20 is arranged between the inert gas system 10 and the electrolytic water hydrogen production device 30. The gas pressure detection system 20 is connected to the inert gas system 10, and the gas pressure detection system 20 is connected to the air pressure pipeline of the electrolytic water hydrogen production device 30. The water pressure boosting control device 60 is used to provide the water pressure required for the pressure test. The water pressure detection system 50 is arranged between the water pressure boosting control device 60 and the electrolytic water hydrogen production device 30. The water pressure detection system 50 is connected to the water pressure boosting control device 60, and the water pressure detection system 50 is connected to the hydraulic pipeline of the electrolytic water hydrogen production device. The overpressure safety protection device 40 includes a safety main pipeline 41 and a plurality of safety branch pipelines 42 connected in parallel with the safety main pipeline 41. One end of the safety main pipeline 41 is connected to the output pipeline of the electrolytic water hydrogen production device, the other end of the safety main pipeline 41 is provided with a first control valve 43, the safety branch pipeline 42 is provided with a second control valve 44, and a third control valve 45 is provided at the end of the safety branch pipeline 42 away from the safety main pipeline 41.

[0027] Exemplarily, the inert gas system 10 is used to supply the required inert gas to the air pressure pipeline of the electrolytic water hydrogen production device 30 so as to be able to provide the air pressure required for the pressure test. In addition, it should be noted that the gas provided by the inert gas system 10 can be nitrogen, or other inert gases, and no limitation is made thereto.

[0028] Exemplarily, the above-mentioned "plurality" refers to one or more, and specifically depends on the air pressure of the test. For example: According to the test requirements, the air pressure test pressure of the hydrogen production system is divided into 1.15 times the design pressure and 1.5 times the design pressure. Two safety branch pipelines 42 can be used, corresponding to 1.15 times the design pressure and 1.5 times the design pressure respectively. The safety branch pipeline 42 that matches the test air pressure is put into use to ensure that the excess air pressure is discharged, so as to ensure that the test pressure will not exceed the set value during the air pressure test.

[0029] It should be noted that the overpressure safety protection device 40 can be integrated in a box body, and moving wheels are arranged at the bottom of the box body so that it can be used at any time according to needs.

[0030] Exemplarily, the third control valve 45 in the above embodiment is preferably a safety valve for regulating pressure, but is not limited thereto.

[0031] Based on the above technical features, the pressure test safety device for electrolytic water hydrogen production uses one end of the safety main pipeline 41 to be connected to the air pressure pipeline of the electrolytic water hydrogen production device 30, and a plurality of safety branch pipelines 42 are connected in parallel on the safety main pipeline 41. The third control valve 45 on each safety branch pipeline 42 is set with different preset test pressures. When the actual test pressure of the system exceeds the preset test pressure, the third control valve 45 automatically jumps up and exhausts. According to different test pressures, the second control valve 44 of the corresponding safety branch pipeline 42 is opened, so that during the process of introducing gas from the inert gas system 10 into the air pressure pipeline, by performing overpressure discharge on the third control valve 45 on the safety branch pipeline 42, it can be ensured that the test pressure of the air pressure pipeline will not exceed the pressure, ensuring the safety of the test; at the same time, water can also be introduced into the hydraulic pipeline of the electrolytic water hydrogen production device 30 through the water pressure boosting control device 60 and maintained for a preset duration, and then the water pressure value of the hydraulic pipeline is detected by the water pressure detection system 50 to test whether there is a leakage in the hydraulic pipeline. The structure is simple, the test is convenient, and different types of tests can be realized for the pipelines in the electrolytic water hydrogen production device 30.

[0032] In one embodiment, the gas pressure detection system 20 includes a first main pipeline 21, a fourth control valve 23, a fifth control valve 24, and a first branch pipeline 22 connected to the first main pipeline 21. One end of the first main pipeline 21 is connected to the inert gas system 10, the other end of the first main pipeline 21 is connected to the air pressure pipeline of the electrolytic water hydrogen production device 30, the fourth control valve 23 and the fifth control valve 24 are respectively arranged on the first main pipeline 21 and the first branch pipeline 22, and a pressure transmitter 25 is arranged at the end of the first branch pipeline 22 away from the first main pipeline 21.

[0033] Exemplarily, both ends of the first main pipeline 21 are used to connect the inert gas system 10 and the air pressure pipeline for electrolytic water hydrogen production, so that the gas of the inert gas system 10 can be led to the air pressure pipeline, thereby increasing the pressure in the air pressure pipeline. Finally, a pressure transmitter 25 is used to observe the pressure change rate during this process, and thus determine whether there is a leakage in the air pressure pipeline according to the observation results. Additionally, the gas quantity leading to the air pressure pipeline can also be adjusted through a fourth control valve 23, so that the air pressure in the air pressure pipeline can be gradually increased according to the test requirements to observe whether there is a pressure change during the pressure increase process.

[0034] Exemplarily, a fifth control valve 24 is used to control the on-off of the first branch pipeline 22, so that the pressure transmitter 25 can detect the pressure change rate of the air pressure pipeline.

[0035] In one implementation manner, a first pressure gauge 70 and a second pressure gauge 80 are further included. The first main pipeline 21 is connected to the air pressure pipeline through a first connecting pipe 90, and the first pressure gauge 70 is arranged on the first connecting pipe 90. The safety main pipeline 41 is connected to the air pressure pipeline through a second connecting pipe 100, and the second pressure gauge 80 is arranged on the second connecting pipe 100. In this way, the pressure changes before and after the gas enters the air pressure pipeline are respectively detected by the first pressure gauge 70 and the second pressure gauge 80. If there is no pressure change, it indicates that there is no leakage in the air pressure pipeline.

[0036] In one implementation manner, a water pressure detection system 50 includes a second main pipeline 51, a sixth control valve 53, a third pressure gauge 54, and a second branch pipeline 52 connected to the second main pipeline 51. Both ends of the second main pipeline 51 are respectively connected to a water pressure boosting control device 60 and the water inlet end of a hydraulic pipeline. The sixth control valve 53 is arranged on the second main pipeline 51, and the third pressure gauge 54 is arranged at one end of the second branch pipeline 52 far from the second main pipeline 51.

[0037] In one implementation manner, the water pressure boosting control device 60 includes a water tank 61, a booster pump 63, and a water delivery pipeline 62. One end of the water delivery pipeline 62 is communicated with the water tank 61, the other end of the water delivery pipeline 62 is connected to the second main pipeline 51, and the booster pump 63 is arranged on the water delivery pipeline 62 and is used to pump the water in the water tank 61 to the second main pipeline 51 and flow into the hydraulic pipeline for a water pressure test.

[0038] Exemplarily, the booster pump 63 is controlled to start, so that the water in the water tank 61 is led to the second main pipeline 51 through the water delivery pipeline 62 and then flows into the hydraulic pipeline, filling the hydraulic pipeline with water, so as to facilitate the detection of whether there is a leakage in the liquid pipeline by the water pressure detection system 50 later.

[0039] In one embodiment, the water pressure boosting control device 60 further includes a pressure reducing valve 64. The pressure reducing valve 64 is disposed on the water delivery pipeline 62 and is located behind the booster pump 63, and is used to adjust the water pressure of the water delivery pipeline 62. It should be noted that the pressure reducing valve 64 is provided to adjust the water pressure of the water delivery pipeline 62, but during the process of adjusting the water pressure, it needs to be adjusted step by step and multiple times, and the water pressure cannot be adjusted to the test water pressure at one time. For example, the water pressure adjusted by the pressure reducing valve 64 each time is set to 10% of the test pressure, and the adjustment is made every 5 minutes until the test pressure is adjusted to the test water pressure and maintained for a preset duration.

[0040] In one embodiment, it further includes a return water pipeline 110 and a seventh control valve 120. Two ends of the return water pipeline 110 are respectively communicated with the water tank 61 and the water outlet end of the hydraulic pipeline. The seventh control valve 120 is disposed on the return water pipeline 110 and is used to control the on or off of the return water pipeline 110. In this way, when the water pressure test is completed, the seventh control valve 120 is opened so that the return water pipeline 110 is in a conducting state. At this time, the water in the hydraulic pipeline flows back to the water tank 61 through the recovery pipeline, realizing the recycling of water and being beneficial to saving resources.

[0041] In one embodiment, the inert gas system 10 includes a nitrogen source 11 and a gas transmission pipeline 12. Two ends of the gas transmission pipeline 12 are respectively connected to the nitrogen source 11 and the gas pressure detection system 20.

[0042] In one embodiment, the inert gas system 10 further includes a fourth pressure gauge 13. The fourth pressure gauge 13 is disposed on the gas transmission pipeline 12. In this way, the pressure value of the inert gas can be observed by using the fourth pressure gauge 13 for adjustment.

[0043] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A pressure test safety device for an electrolytic water hydrogen production system, characterized in that, Comprising: An inert gas system for providing the air pressure required for the pressure test; A gas pressure detection system provided between the inert gas system and the electrolytic water hydrogen production equipment. The gas pressure detection system is connected to the inert gas system and is also connected to the air pressure pipeline of the electrolytic water hydrogen production equipment; A water pressure boosting control device for providing the water pressure required for the pressure test; A water pressure detection system provided between the water pressure boosting control device and the electrolytic water hydrogen production equipment. The water pressure detection system is connected to the water pressure boosting control device and is also connected to the hydraulic pipeline of the electrolytic water hydrogen production equipment; And An overpressure safety protection device, which includes a main safety pipeline and a plurality of safety branch pipelines connected in parallel with the main safety pipeline. One end of the main safety pipeline is connected to the output pipeline of the electrolytic water hydrogen production equipment, a first control valve is provided at the other end of the main safety pipeline, a second control valve is provided on the safety branch pipeline, and a third control valve is provided at the end of the safety branch pipeline away from the main safety pipeline.

2. The pressure test safety device for an electrolytic water hydrogen production system according to claim 1, characterized in that, The gas pressure detection system includes a first main pipeline, a fourth control valve, a fifth control valve, and a first branch pipeline connected to the first main pipeline. One end of the first main pipeline is connected to the inert gas system, the other end of the main pipeline is connected to the air pressure pipeline of the electrolytic water hydrogen production equipment, the fourth control valve and the fifth control valve are respectively provided on the first main pipeline and the first branch pipeline, and a pressure transmitter is provided at the end of the first branch pipeline away from the first main pipeline.

3. The pressure test safety device for the electrolytic water hydrogen production system according to claim 2, characterized in that, It further includes a first pressure gauge and a second pressure gauge. The first main pipeline is connected to the air pressure pipeline through a first connecting pipe, the first pressure gauge is provided on the first connecting pipe, the main safety pipeline is connected to the air pressure pipeline through a second connecting pipe, and the second pressure gauge is provided on the second connecting pipe.

4. The pressure test safety device for the electrolytic water hydrogen production system according to claim 1, characterized in that, The water pressure detection system includes a second main pipeline, a sixth control valve, a third pressure gauge, and a second branch pipeline connected to the second main pipeline. Both ends of the second main pipeline are respectively connected to the water pressure boosting control device and the water inlet end of the hydraulic pipeline. The sixth control valve is provided on the second main pipeline, and the third pressure gauge is provided at the end of the second branch pipeline away from the second main pipeline.

5. The pressure test safety device for an electrolytic water hydrogen production system according to claim 4, characterized in that, The water pressure boosting control device includes a water tank, a booster pump, and a water delivery pipeline. One end of the water delivery pipeline is communicated with the water tank, the other end of the water delivery pipeline is connected to the second main pipeline, and the booster pump is provided on the water delivery pipeline for pumping the water in the water tank to the second main pipeline and flowing into the hydraulic pipeline for the water pressure test.

6. The pressure test safety device for the electrolytic water hydrogen production system according to claim 5, characterized in that, The water pressure boosting control device further includes a pressure reducing valve provided on the water delivery pipeline and located behind the booster pump for regulating the water pressure of the water delivery pipeline.

7. The pressure test safety device for the electrolytic water hydrogen production system according to claim 6, characterized in that, It further includes a return water pipeline and a seventh control valve. Both ends of the return water pipeline are respectively communicated with the water tank and the water outlet end of the hydraulic pipeline. The seventh control valve is provided on the return water pipeline for controlling the on or off of the return water pipeline.

8. The pressure test safety device for the electrolytic water hydrogen production system according to claim 1, characterized in that, The inert gas system includes a nitrogen source and a gas pipeline, and two ends of the gas pipeline are respectively connected to the nitrogen source and the gas pressure detection system.

9. The pressure test safety device for an electrolytic water hydrogen production system according to claim 8, characterized in that, The inert gas system further includes a fourth pressure gauge, and the fourth pressure gauge is arranged on the gas pipeline.

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