Hydrogen flame arrester

Abstract

The utility model discloses a hydrogen flame arrester which comprises a cylinder body, a sealing cover, a gas inlet pipe and a gas outlet pipe, one end of the cylinder body is provided with an opening, the sealing cover covers one end of the cylinder body to seal the opening, water is stored in the cylinder body, one end of the gas inlet pipe penetrates through the sealing cover and extends to the position below the water surface, and the other end of the gas inlet pipe is used for being communicated with an emptying pipe of a hydrogen system. One end of the exhaust pipe penetrates through the sealing cover and is located above the water surface, and the other end of the exhaust pipe is arranged outside the barrel. The hydrogen flame arrester overcomes the defects of a dry type hydrogen flame arrester in the prior art, and is simple in structure and easy to manufacture and maintain.

Description

Technical Field

[0001] The utility model relates to a safety device, in particular to a hydrogen flame arrester. Background Art

[0002] Due to its high thermal conductivity, hydrogen is commonly used as a cooling medium for generator rotor windings and stator cores in thermal power plants. However, hydrogen is a flammable and explosive gas, and can explode at concentrations of 4% to 74.2% in air.

[0003] Therefore, in thermal power plants, flame arresters must be installed on the exhaust pipes of hydrogen systems used to cool generators to prevent flashback. Existing technologies typically use dry-type flame arresters, which consist of a sealed container filled with fine sand to block fires caused by hydrogen gas discharged from the exhaust pipes. However, dry-type flame arresters are prone to sand compaction during use, resulting in blockage of the arrester pores and increased pressure drop. Regular cleaning and replacement are necessary to ensure effective fire suppression. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned prior art, a liquid hydrogen flame arrester is provided according to an embodiment of the present utility model.

[0005] According to one aspect of an embodiment of the present utility model, a hydrogen flame arrester is provided, comprising: a cylinder, a sealing cover, an air inlet pipe, and an exhaust pipe; one end of the cylinder has an opening, the sealing cover is sealed on one end of the cylinder to seal the opening, water is stored in the cylinder, one end of the air inlet pipe passes through the sealing cover and extends below the water surface, the other end of the air inlet pipe is used to communicate with an exhaust pipe of a hydrogen system, one end of the exhaust pipe passes through the sealing cover and is located above the water surface, and the other end of the exhaust pipe is placed outside the cylinder.

[0006] In an example of the hydrogen flame arrester provided in the above aspect, the hydrogen flame arrester further includes: a backflow prevention check valve, arranged on the air inlet pipe, for preventing water in the cylinder from entering the exhaust pipe of the hydrogen system through the air inlet pipe.

[0007] In an example of the hydrogen flame arrester provided in the above aspect, the hydrogen flame arrester further includes: an observation window provided on the cylinder.

[0008] In an example of the hydrogen flame arrester provided in the above aspect, a high water level scale line and a low water level scale line are provided on the observation window.

[0009] In an example of the hydrogen flame arrester provided in the above aspect, the hydrogen flame arrester further includes: a water inlet pipe, which is connected to the cylinder and is used to inject water into the cylinder.

[0010] In an example of the hydrogen flame arrester provided in the above aspect, a first valve is provided on the water inlet pipe.

[0011] In an example of the hydrogen flame arrester provided in the above aspect, the hydrogen flame arrester further includes: a drain pipe, which is communicated with the cylinder and is used to drain water in the cylinder.

[0012] In an example of the hydrogen flame arrester provided in the above aspect, a second valve is provided on the drain pipe.

[0013] Beneficial effects: The hydrogen flame arrester according to the embodiment of the present invention solves the defects of the dry hydrogen flame arrester in the prior art, and has a simple structure and is easy to manufacture and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and other aspects, features and advantages of the embodiments of the present invention will become more apparent through the following description in conjunction with the accompanying drawings, in which:

[0015] Figure 1 It is a structural schematic diagram of a hydrogen flame arrester according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0016] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention may be implemented in many different forms, and the present invention should not be construed as limited to the specific embodiments set forth herein. Rather, these embodiments are provided to explain the principles of the present invention and its practical applications, thereby enabling others skilled in the art to understand the various embodiments of the present invention and various modifications suitable for specific intended applications.

[0017] As used herein, the term "including" and its variations are open terms meaning "including but not limited to". The terms "based on", "according to", etc. mean "based at least in part on", "based at least in part on". The terms "embodiment", "one example", "one embodiment" and "an embodiment" mean "at least one embodiment". The terms "another embodiment", "another embodiment", "another example", "yet another example" mean "at least one other embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other definitions may be included below, whether explicit or implicit. Unless the context clearly indicates otherwise, the definition of a term is consistent throughout the specification.

[0018] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, the accompanying drawings only show structures and / or processing steps closely related to the solutions according to the present invention, while other details that are not very relevant are omitted.

[0019] Figure 1 It is a structural schematic diagram of a hydrogen flame arrester according to an embodiment of the present utility model.

[0020] Reference Figure 1 The hydrogen flame arrester according to the embodiment of the present utility model includes: a cylinder 1, a sealing cover 2, an air inlet pipe 3 and an exhaust pipe 4.

[0021] Specifically, the cylinder 1 can be cylindrical as a whole, but the present invention is not limited thereto. One end of the cylinder 1 has an opening (not shown), and the sealing cap 2 covers the one end of the cylinder 1 to seal the opening. As an example, the sealing cap 2 can be fixed to the one end of the cylinder 1 by bolts to seal the opening.

[0022] Water is stored within the cylinder 1, though other non-flammable, fire-blocking liquids can be used. One end of the intake pipe 3 extends through the sealing cap 2 and below the water surface. The other end of the intake pipe 3 is connected to an exhaust pipe (not shown) of a hydrogen system (not shown). The hydrogen system is typically used to provide hydrogen as a cooling medium for the rotor windings and stator cores of thermal power plant generators.

[0023] One end of the exhaust pipe 4 passes through the sealing cover 2 and is located above the water surface, and the other end of the exhaust pipe 4 is placed outside the cylinder 1, that is, placed in the atmospheric environment. Here, preferably, the end surface of one end of the exhaust pipe 4 is flush with the surface of the sealing cover 2 facing the water surface, but the utility model is not limited to this.

[0024] In this embodiment, to prevent water within the cylinder 1 from being drawn into the intake pipe 3 and to ensure the flow of hydrogen within the intake pipe 3, the hydrogen flame arrester further includes a backflow prevention check valve 5 disposed on the intake pipe 3 to prevent water within the cylinder 1 from passing through the intake pipe 3 and entering the exhaust pipe of the hydrogen system. Of course, it is understood that in other embodiments of the present invention, the backflow prevention check valve 5 may not be provided.

[0025] In order to observe the liquid level within the cylinder 1 and prevent the water level from decreasing and falling below one end of the intake pipe 3, the hydrogen flame arrester further includes an observation window 6 disposed on the cylinder 1. Of course, it is understood that in other embodiments of the present invention, the observation window 6 may not be provided. Furthermore, to improve the safety of the hydrogen flame arrester, the observation window 6 is provided with a high water level scale line 61 and a low water level scale line 62 to ensure that the water level remains within a safe range. Specifically, the water level will not be too high to submerge the other end of the exhaust pipe 4, and the water level will not fall below one end of the intake pipe 3, causing it to be above the water level.

[0026] In this embodiment, in order to add water into the cylinder 1, the hydrogen flame arrester further includes a water inlet pipe 7, which is connected to the cylinder 1 and is used to inject water into the cylinder 1. Furthermore, the water inlet pipe 7 is provided with a first valve 71 to control whether the water inlet pipe 7 is open or closed.

[0027] To drain the water from the cylinder 1, the hydrogen flame arrester further includes a drain pipe 8, which communicates with the interior of the cylinder 1 and is used to drain the water, such as water that has deteriorated after prolonged use. Furthermore, a second valve 81 is provided on the drain pipe 8 to control whether the drain pipe 8 is open or closed.

[0028] Therefore, through the cooperation of the water inlet pipe 7 and the outlet pipe 8, the water in the cylinder 1 (especially the deteriorated water) can be replaced to maintain the water in the cylinder 1 as clean water.

[0029] Continue to refer to Figure 1 The hydrogen flame arrester according to the embodiment of the present invention operates as follows: an intake pipe 3, connected to the exhaust pipe of the hydrogen system, receives hydrogen discharged from the exhaust pipe. The hydrogen is then introduced into the water below the surface. Since hydrogen is lightweight and insoluble in water, it emerges from the water surface and is discharged through an exhaust pipe 4. If the hydrogen discharged from the other end of the exhaust pipe 4 ignites, the fire will flash back along the exhaust pipe 4 to the surface of the water. The water inside the cylinder 1 will block the flashback, preventing it from affecting the hydrogen in the intake pipe 3 below the water surface, thereby achieving a flame arresting effect.

[0030] In summary, the hydrogen flame arrester according to the embodiment of the present invention solves the defects of the dry hydrogen flame arrester in the prior art, and at the same time has a simple structure and is easy to manufacture and maintain.

[0031] The above describes in detail the optional implementation methods of the embodiments of the present invention in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details of the above implementation methods. Within the technical concept of the embodiments of the present invention, the technical solutions of the embodiments of the present invention can be modified in a variety of simple ways, and these simple modifications all fall within the scope of protection of the embodiments of the present invention.

Claims

1. A hydrogen flame arrester, characterized in that: The hydrogen flame arrester comprises: a cylinder, a sealing cover, an air inlet pipe and an exhaust pipe; One end of the cylinder has an opening, and the sealing cover is sealed on one end of the cylinder to seal the opening. Water is stored in the cylinder, one end of the air inlet pipe passes through the sealing cover and extends below the water surface, and the other end of the air inlet pipe is used to communicate with the exhaust pipe of the hydrogen system, one end of the exhaust pipe passes through the sealing cover and is located above the water surface, and the other end of the exhaust pipe is placed outside the cylinder.

2. The hydrogen flame arrester according to claim 1, characterized in that: The hydrogen flame arrester further includes: a backflow prevention check valve, which is arranged on the air inlet pipe and is used to prevent water in the cylinder from passing through the air inlet pipe and entering the exhaust pipe of the hydrogen system.

3. The hydrogen flame arrester according to claim 1, characterized in that The hydrogen flame arrester further includes an observation window arranged on the cylinder.

4. The hydrogen flame arrester according to claim 3, characterized in that: The observation window is provided with a high water level scale line and a low water level scale line.

5. The hydrogen flame arrester according to claim 1 or 4, characterized in that: The hydrogen flame arrester further includes a water inlet pipe, which is communicated with the cylinder and is used to inject water into the cylinder.

6. The hydrogen flame arrester according to claim 5, characterized in that: The water inlet pipe is provided with a first valve.

7. The hydrogen flame arrester according to claim 1 or 4, characterized in that: The hydrogen flame arrester further includes a drain pipe, which is in communication with the cylinder and is used to drain water from the cylinder.

8. The hydrogen flame arrester according to claim 7, characterized in that: A second valve is provided on the drain pipe.

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