Tail gas emptying system for hydrogen fuel darkroom

Abstract

The utility model discloses a tail gas emptying system for a hydrogen fuel darkroom, which comprises a hydrogen supply system communicated with the darkroom and used for supplying hydrogen required by a hydrogen fuel cell test into the darkroom; the front end emptying system is connected with the hydrogen supply system and is used for providing inert gas and purging hydrogen at the front end of the hydrogen fuel darkroom test pipeline; and the rear-end emptying system is communicated with the hydrogen supply system and the front-end emptying system and is used for purging hydrogen at the rear end of the hydrogen fuel darkroom test pipeline by using inert gas provided by the front-end emptying system. According to the utility model, the front-end emptying system and the rear-end emptying system are used for carrying out multi-stage control emptying treatment on the conveying pipeline of the hydrogen supply system, so that the residual hydrogen is treated, and the test system of the hydrogen fuel cell is safer.

Description

Technical Field

[0001] The utility model relates to a hydrogen fuel darkroom tail gas exhaust system, belonging to the technical field of electromagnetic compatible hydrogen fuel. Background Art

[0002] The application of hydrogen energy is mainly based on the production and consumption scenarios built around hydrogen fuel. Compared with internal combustion engines, hydrogen fuel cells have absolute application advantages. A fuel cell is a device that directly converts the chemical energy of fuel into electrical energy in a non-combustion manner. When working, it uses electrodes to cause a non-combustion electrochemical reaction between the hydrogen (hydrogen-containing fuel) entering the negative electrode and the oxygen entering the positive electrode. The hydrogen is decomposed into positive ions H+ and electrons e- under the action of the catalyst on the negative electrode. H+ enters the electrolyte, while e- moves along the external circuit to the positive electrode (cathode) to generate current. At the positive electrode, the oxygen in the air and the H+ in the electrolyte absorb the electrons e- that reach the positive electrode to form water.

[0003] Most hydrogen fuel cell vehicles use high-pressure hydrogen storage tanks / cylinders to store hydrogen, which has the risk of leakage. In addition, hydrogen has a low density, diffuses quickly, and is colorless and odorless, making it difficult to detect hydrogen leakage. If the leakage is small during use, the hydrogen diffuses into the air, causing less harm and not likely to cause a large-scale fire; if it is in a relatively closed environment, due to its flammable and explosive physical properties, a large amount of hydrogen leakage can easily cause a deflagration.

[0004] For this purpose, we proposed a hydrogen fuel darkroom exhaust gas exhaust system. Utility Model Content

[0005] The technical problem to be solved by the utility model is that hydrogen fuel cells have a risk of leakage. If they are in a relatively closed environment, due to their flammable and explosive physical properties, a large amount of hydrogen leakage can easily cause a deflagration problem.

[0006] In order to solve the above technical problems, the utility model provides a hydrogen fuel darkroom tail gas exhaust system to timely exhaust the residual hydrogen in the pipeline.

[0007] In order to achieve the above technical objectives and the above technical effects, this application is implemented through the following technical solutions:

[0008] A hydrogen fuel darkroom tail gas exhaust system, comprising:

[0009] A hydrogen supply system, connected to the darkroom, for providing hydrogen required for the hydrogen fuel cell test to the darkroom;

[0010] A front-end emptying system is connected to the hydrogen supply system to provide inert gas and purge hydrogen at the front end of the hydrogen fuel darkroom test pipeline;

[0011] The rear-end emptying system is connected to the hydrogen supply system and the front-end emptying system, and uses the inert gas provided by the front-end emptying system to purge the hydrogen at the rear end of the hydrogen fuel darkroom test pipeline.

[0012] Preferably, the hydrogen supply system includes a hydrogen storage tank, a first-level pressure reducing valve 1, a ball valve 1 and a ball valve 2, the first-level pressure reducing valve 1 is connected to the hydrogen storage tank, one end of the ball valve 1 is connected to the first-level pressure reducing valve 1, the other end of the ball valve 1 is connected to the ball valve 2, and the other end of the ball valve 2 is connected to a dark chamber.

[0013] Furthermore, the front-end emptying system includes a gas storage cylinder, a first-level pressure reducing valve 2, a ball valve 3, a ball valve 4, a second-level pressure reducing valve 1, a ball valve 5 and a ball valve 6. The gas storage cylinder is used to store inert gas for exhaust gas purging. One end of the first-level pressure reducing valve 2 is connected to the gas storage cylinder, and the other end is connected to the ball valve 3. The other end of the ball valve 3 is connected to the ball valve 4. The other end of the ball valve 4 is connected to the second-level pressure reducing valve 1. The other end of the second-level pressure reducing valve 1 is connected to the ball valve 5. The other end of the ball valve 5 is connected to the ball valve 2. The ball valve 5 and the ball valve 2 are connected to the ball valve 6 to lead to the outdoors.

[0014] Furthermore, a flame arrester is provided between the ball valve one and the ball valve two, one end of the flame arrester is connected to the ball valve four and the ball valve one, and the other end of the flame arrester is connected to the secondary pressure reducing valve one.

[0015] Furthermore, the rear-end emptying system includes a secondary pressure-reducing valve 2, a ball valve 7, a ball valve 8, a ball valve 9, a ball valve 10, a ball valve 11 and an airflow control component, the ball valve 3 is connected to the secondary pressure-reducing valve 2, the other end of the secondary pressure-reducing valve 2 is connected to the ball valve 7, the ball valve 7 and the ball valve 8 are connected and connected to the dark room, the ball valve 7 and the ball valve 8 are connected to the ball valve 9, the ball valve 9 and the ball valve 10 are connected through the airflow control component, the ball valve 10 is arranged between the ball valve 5 and the ball valve 2, the ball valve 9 and the ball valve 11 are connected through the airflow control component, the ball valve 11 is connected to the outside of the room, and the ball valve 9, the ball valve 10 and the ball valve 11 are connected to each other through the airflow control component.

[0016] Furthermore, the airflow control component is a Venturi valve.

[0017] Furthermore, the first-stage pressure reducing valve 1 and the second-stage pressure reducing valve are both double-head pressure reducing valves, which are used for regulating the high-pressure gas at the gas outlet of the hydrogen storage tank and the gas cylinder.

[0018] Furthermore, the second-level pressure reducing valve 1 and the second-level pressure reducing valve 2 are both single-head pressure reducing valves, which are used for regulating the air pressure in pipelines and pipelines.

[0019] The utility model provides a hydrogen fuel darkroom tail gas exhaust system, which has the following advantages:

[0020] When the utility model is used, the conveying pipeline is emptied by using inert gas, and the residual hydrogen is processed by controlling the switch of the ball valve, so that the test system of the hydrogen fuel cell is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a hydrogen fuel darkroom tail gas exhaust system mainly embodied in the utility model;

[0022] In the figure:

[0023] 1-Hydrogen supply system; 11-Hydrogen storage tank; 12-First-stage pressure reducing valve one; 13-Ball valve one; 14-Ball valve two; 2-Front-end emptying system; 21-Gas storage cylinder; 22-First-stage pressure reducing valve two; 23-Ball valve three; 24-Ball valve four; 25-Second-stage pressure reducing valve one; 26-Ball valve five; 27-Ball valve six; 3-Flame arrester; 4-Rear-end emptying system; 41-Second-stage pressure reducing valve two; 42-Ball valve seven; 43-Ball valve eight; 44-Ball valve nine; 45-Ball valve ten; 46-Ball valve eleven; 47-Airflow control component. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technical personnel in the field without creative work are within the scope of protection of the present utility model.

[0025] Reference Figure 1 A hydrogen fuel darkroom tail gas exhaust system comprises a hydrogen supply system 1, a front-end exhaust system 2 and a rear-end exhaust system 4. The hydrogen supply system 1 is connected with the darkroom and is used to provide hydrogen required for hydrogen fuel cell testing in the darkroom; the front-end exhaust system 2 is connected with the hydrogen supply system 1 through a pipeline and is used to provide inert gas and purge hydrogen at the front end of the hydrogen fuel darkroom test pipeline; the rear-end exhaust system 4 is connected with the hydrogen supply system 1 and the front-end exhaust system 2 through a pipeline, and the inert gas provided by the front-end exhaust system 2 is used to purge hydrogen at the rear end of the hydrogen fuel darkroom test pipeline, thereby performing multi-stage controlled exhaust processing on the delivery pipeline of the hydrogen supply system 1 to deal with the residual hydrogen, making the hydrogen fuel cell test system safer.

[0026] Reference Figure 1In a further embodiment, the hydrogen supply system 1 includes a hydrogen storage tank 11, a first-level pressure reducing valve 12, a ball valve 13 and a second ball valve 14. The hydrogen storage tank 11 is used to provide hydrogen fuel for hydrogen fuel cell testing. The first-level pressure reducing valve 12 is connected to the hydrogen storage tank 11, one end of the ball valve 13 is connected to the first-level pressure reducing valve 12, and the other end of the ball valve 13 is connected to the second ball valve 14. The other end of the second ball valve 14 is connected to the dark room. In this embodiment, the first-level pressure reducing valve 12 is preferably a large-flow double-head pressure reducing valve. The first-level pressure reducing valve 12 is used to adjust the high-pressure gas pressure at the gas outlet of the hydrogen storage tank 11. The ball valve 13 and the second ball valve 14 are used to cut off, distribute and change the flow direction of the gas medium flowing through the pipeline of the hydrogen supply system 1. They are all existing technologies and will not be described in detail.

[0027] Reference Figure 1 In a further embodiment, the front-end emptying system 2 includes a gas storage cylinder 21, a first-level pressure reducing valve 22, a ball valve 3 23, a ball valve 4 24, a second-level pressure reducing valve 1 25, a ball valve 5 26 and a ball valve 6 27. The gas storage cylinder 21 is used to store inert gas for tail gas purging. One end of the first-level pressure reducing valve 22 is connected to the gas storage cylinder 21, and the other end is connected to the ball valve 3 23. The other end of the ball valve 3 23 is connected to the ball valve 4 24. The other end of the ball valve 4 24 is connected to the second-level pressure reducing valve 1 25. The other end of the second-level pressure reducing valve 1 25 is connected to the ball valve 5 26. The other end of the ball valve 5 26 is connected to the ball valve 2 14. , ball valve five 26 and ball valve two 14 are connected with ball valve six 27 to the outside. In this embodiment, the inert gas is preferably nitrogen. The first-level pressure reducing valve two 22 is preferably a large-flow double-head pressure reducing valve for regulating the high-pressure gas pressure at the gas outlet of the gas storage cylinder 21. The second-level pressure reducing valve one 25 is preferably a single-head pressure reducing valve for regulating the air pressure in the pipeline and the pipeline. The ball valve three 23, the ball valve four 24, the ball valve five 26, and the ball valve six 27 are used to cut off, distribute and change the flow direction of the gas medium flowing through the hydrogen supply system 1 and the front-end emptying system 2 pipelines. They are all prior arts and will not be described in detail.

[0028] Reference Figure 1 In a further embodiment, a flame arrester 3 is connected and installed on the pipeline between the ball valve 13 and the ball valve 2 14. One end of the flame arrester 3 is connected to the ball valve 4 24 and the ball valve 13, and the other end is connected to the secondary pressure reducing valve 1 25. In this embodiment, the flame arrester 3 is a safety device to prevent the spread of flames of flammable gases and flammable liquid vapors, and is composed of a flame arrester core, a flame arrester 3 shell and accessories. It is a prior art and will not be described in detail.

[0029] Reference Figure 1In a further embodiment, the rear end emptying system 4 includes a secondary pressure reducing valve 2 41, a ball valve 7 42, a ball valve 8 43, a ball valve 9 44, a ball valve 10 45, a ball valve 10 45 and an air flow control member 47. The ball valve 3 23 is connected to the secondary pressure reducing valve 2 41, and the other end of the secondary pressure reducing valve 2 41 is connected to the ball valve 7 42. The ball valve 7 42 and the ball valve 8 43 are connected to the dark room. The ball valve 7 42 and the ball valve 8 43 are connected to the ball valve 9 44. The ball valve 9 44 and the ball valve 10 45 are connected through the air flow control member 47. 7 is connected, ball valve ten 45 is connected and installed between ball valve five 26 and ball valve two 14, ball valve nine 44 is connected with ball valve ten 45 one through air flow control component 47, ball valve ten 45 one is connected to the outside, ball valve nine 44, ball valve ten 45 and ball valve ten 45 one are connected to each other through air flow control component 47. In this embodiment, the secondary pressure relief valve two is preferably a large-flow single-head pressure reducing valve, and the air flow control component 47 is a Venturi valve. The air flow control component 47 mainly plays the role of accurately controlling the air volume to adjust and control the pressure difference in the pipeline.

[0030] The tail gas exhaust method of the hydrogen fuel darkroom tail gas exhaust system of the utility model is as follows:

[0031] After using the hydrogen fuel, close the first-level pressure reducing valve 12, ball valve 13, and ball valve 2 14, and open ball valve 6 27 first, then open the first-level pressure reducing valve 2 22, ball valve 3 23, and ball valve 4 24 in sequence. After blowing for about five minutes, close ball valve 6 27, ball valve 5 26, and second-level pressure reducing valve 1 25. After this operation, the hydrogen purge at the front end of ball valve 5 26 in the hydrogen pipeline is completed. Subsequently, the ball valve 10 45 is opened first, and then the secondary pressure reducing valve 2 41, ball valve 7 42, ball valve 9 44 are opened in sequence, and finally the ball valve 10 45 is opened. Nitrogen is blown into the air flow control part 47 from the ball valve 9 44 and then blown out to the ball valve 10 45. After the nitrogen enters the air flow control part 47 through the ball valve 9 44, the air is blown out of the ball valve 10 45, and then the suction is generated through the ball valve 10 45 to purge the residual hydrogen between the ball valve 5 26 and the ball valve 2 14. After blowing for five minutes, the ball valve 10 45 is closed first, and then the ball valve 10 45, ball valve 9 44, the primary pressure reducing valve 2 22, the ball valve 3 23, the secondary pressure reducing valve 2 41 and the ball valve 7 42 are closed in sequence. At this point, the exhaust gas from the hydrogen fuel darkroom test pipeline is emptied.

[0032] The above is only a preferred embodiment of the utility model, and is not any formal or substantial limitation of the utility model. It should be pointed out that ordinary technicians in this technical field can make some improvements and supplements without departing from the utility model, and these improvements and supplements should also be regarded as the protection scope of the utility model. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the utility model, which are all equivalent embodiments of the utility model; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. A hydrogen fuel darkroom tail gas exhaust system, characterized in that: include: A hydrogen supply system (1), connected to the darkroom, for providing hydrogen required for the hydrogen fuel cell test to the darkroom; A front-end exhaust system (2) is connected to the hydrogen supply system (1) to provide inert gas and purge hydrogen at the front end of the hydrogen fuel darkroom test pipeline; The rear end emptying system (4) is connected to the hydrogen supply system (1) and the front end emptying system (2), and uses the inert gas provided by the front end emptying system (2) to purge the hydrogen at the rear end of the hydrogen fuel darkroom test pipeline.

2. A hydrogen fuel darkroom tail gas exhaust system as claimed in claim 1, characterized in that: The hydrogen supply system (1) comprises a hydrogen storage tank (11), a first-stage pressure reducing valve (12), a ball valve (13) and a second ball valve (14); the first-stage pressure reducing valve (12) is connected to the hydrogen storage tank (11); one end of the ball valve (13) is connected to the first-stage pressure reducing valve (12); the other end of the ball valve (13) is connected to the second ball valve (14); and the other end of the ball valve (14) is connected to a dark room.

3. A hydrogen fuel darkroom tail gas exhaust system as claimed in claim 2, characterized in that: The front end emptying system (2) comprises a gas storage cylinder (21), a first-stage pressure reducing valve (22), a third ball valve (23), a fourth ball valve (24), a second-stage pressure reducing valve (25), a fifth ball valve (26) and a sixth ball valve (27). The gas storage cylinder (21) is used to store inert gas for tail gas purging. One end of the first-stage pressure reducing valve (22) is connected to the gas storage cylinder (21), and the other end is connected to the third ball valve (23). The other end of the third ball valve (23) is connected to the fourth ball valve (24). The other end of the fourth ball valve (24) is connected to the second-stage pressure reducing valve (25). The other end of the second-stage pressure reducing valve (25) is connected to the fifth ball valve (26). The other end of the fifth ball valve (26) is connected to the second ball valve (14). The fifth ball valve (26) and the second ball valve (14) are connected to the sixth ball valve (27) to lead to the outside.

4. A hydrogen fuel darkroom tail gas exhaust system as claimed in claim 3, characterized in that: A flame arrester (3) is provided between the ball valve one (13) and the ball valve two (14); one end of the flame arrester (3) is connected to the ball valve four (24) and the ball valve one (13); and the other end of the flame arrester (3) is connected to the secondary pressure reducing valve one (25).

5. A hydrogen fuel darkroom tail gas exhaust system as claimed in claim 3, characterized in that: The rear end emptying system (4) comprises a secondary pressure reducing valve 2 (41), a ball valve 7 (42), a ball valve 8 (43), a ball valve 9 (44), a ball valve 10 (45), a ball valve 10 (45) and an air flow control member (47). The ball valve 3 (23) is connected to the secondary pressure reducing valve 2 (41), the other end of the secondary pressure reducing valve 2 (41) is connected to the ball valve 7 (42), the ball valve 7 (42) is connected to the ball valve 8 (43) and is connected to the dark room. The ball valve (44) is connected to the ball valve (44) between the two ends of the housing and the housing. The ball valve (44) is connected to the ball valve (45) through the air flow control component (47). The ball valve (45) is arranged between the ball valve (26) and the ball valve (14). The ball valve (44) is connected to the ball valve (45) through the air flow control component (47). The ball valve (45) is connected to the outside of the housing. The ball valve (44), the ball valve (45) and the ball valve (45) are connected to each other through the air flow control component (47).

6. A hydrogen fuel darkroom tail gas exhaust system as claimed in claim 5, characterized in that: The airflow control element (47) is a Venturi valve.

7. A hydrogen fuel darkroom tail gas exhaust system as claimed in claim 5, characterized in that: The first-stage pressure reducing valve (12) and the second-stage pressure reducing valve (22) are both double-head pressure reducing valves.

8. A hydrogen fuel darkroom tail gas exhaust system as claimed in claim 5, characterized in that: The second-stage pressure reducing valve 1 (25) and the second-stage pressure reducing valve 2 (41) are both single-head pressure reducing valves.

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