Front hydrogen filter of hydrogen fuel cell

Abstract

The utility model discloses a preposed hydrogen filter of a hydrogen fuel cell, which comprises a shell, a partition plate, filter components, a sealing plate, a gas inlet pipeline, a gas outlet pipeline and a drainage component, the partition plate is arranged at the upper part of a cavity of the shell, the upper part of the cavity is divided into two parts by the partition plate, the filter components are vertically arranged in the cavity at the two sides of the partition plate, and the sealing plate is arranged in the cavity. The left side and the right side of the filtering assembly are provided with ventilation openings, the lower end of the filtering assembly and the ventilation opening close to the partition plate are sealed through a sealing plate, an air inlet pipeline and an air outlet pipeline which are communicated with the ventilation opening close to the partition plate are further installed on the upper portion of the shell, and a drainage assembly is installed at the lower end of the shell. According to the mode, impurities in hydrogen can be effectively removed, secondary filtration can be carried out in a limited space, the treatment effect is good, and the problems of high reversibility, low selectivity and the like in the existing hydrogen filtration process are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas processing, in particular to a pre-hydrogen filter for a hydrogen fuel cell. Background Art

[0002] In recent years, as the global call for environmental protection and sustainable development continues to grow, hydrogen fuel cells are receiving more and more attention and importance due to their high energy utilization efficiency, overall green and clean pollution-free and other reasons. In the relevant processes of hydrogen fuel cells, ensuring the quality of fuel hydrogen is the key to ensuring the performance and stability of fuel cells. In the hydrogen production process and hydrogen storage and transportation, hydrogen may be mixed with sulfides (such as H2S), ammonia (NH3), halides, formaldehyde, formic acid, carbon monoxide (CO), carbon dioxide (CO2), hydrocarbons, oxygen (O2), nitrogen (N2), helium (He), argon (Ar), water (H2O) and particulate matter.

[0003] At present, the industry often uses physical adsorption to remove impurities in hydrogen. This technology has certain defects. Physical adsorption is highly reversible, prone to desorption and escape, has low selectivity, and cannot efficiently adsorb specific impurities. Based on the above defects and shortcomings, it is necessary to improve the existing technology and design a hydrogen fuel cell pre-hydrogen filter. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a pre-hydrogen filter for a hydrogen fuel cell, so as to solve the problems of high reversibility and low selectivity in the existing hydrogen filtering process.

[0005] Preferably, in order to solve the above-mentioned technical problems, a technical solution adopted by the utility model is: to provide a hydrogen fuel cell pre-hydrogen filter, the hydrogen fuel cell pre-hydrogen filter comprising a shell, a partition, a filter assembly, a sealing plate, an air inlet pipe, an air outlet pipe and a drainage assembly, a partition is installed on the upper part of the cavity of the shell, the partition divides the upper part of the cavity into two parts, filter assemblies are vertically installed in the cavities on both sides of the partition, the left and right sides of the filter assembly are both vents, the lower end of the filter assembly and the vent near the partition are sealed by a sealing plate, the upper part of the shell is also equipped with an air inlet pipe and an air outlet pipe connected to the vent near the partition, and the lower end of the shell is equipped with a drainage assembly.

[0006] Preferably, the filter assembly includes a polymer filter assembly and a chemical adsorption layer located between two polymer filter layers, and the chemical adsorption layer is filled with an adsorbent.

[0007] Preferably, the drainage assembly includes a plunger embedded in the bottom of the shell and an outlet valve installed on the plunger, the plunger is provided with a through hole communicating with the internal cavity of the shell, the outlet valve is arranged at the through hole, the outlet valve is conical in shape, and a blocking portion for blocking the through hole is provided on the upper part of the outlet valve extending in all directions.

[0008] Preferably, the shell is installed in mid-air, and a hanging ear for hoisting is provided on the top of the shell.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] Two sets of filter components are installed vertically in the cavity, which utilizes the filter space in a limited space and can filter the gas in two steps, achieving good treatment effect.

[0011] The filter layer contains a polymer filter layer and a chemical adsorption layer containing an adsorbent, which can effectively remove impurities in hydrogen and solve the problems of high reversibility and low selectivity in the existing hydrogen filtration process;

[0012] The drain assembly is capable of collecting and discharging water. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic diagram of the structure of a hydrogen fuel cell pre-hydrogen filter.

[0014] Figure 2 The present invention is a schematic diagram of the structure of a filter component of a hydrogen fuel cell pre-filter.

[0015] Among them, 1. shell, 2. partition, 3. filter component, 31. first filter component, 32. second filter component, 301. polymer filter layer, 302. chemical adsorption layer, 4. sealing plate, 5. air inlet pipe, 6. air outlet pipe, 7. drainage component, 71. plunger, 72. outlet valve. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0017] See also Figure 1 and Figure 2 , the utility model embodiment includes:

[0018] A hydrogen fuel cell pre-filter comprises a shell 1, a partition 2, a filter assembly 3, a sealing plate 4, an air inlet pipe 5, an air outlet pipe 6 and a drainage assembly 7.

[0019] The shell 1 is installed in the air, and a hanging ear is arranged on the top of the shell 1 for hoisting.

[0020] A partition 2 is installed on the upper part of the cavity of the shell 1, and the partition 2 divides the upper part of the cavity into two parts. Filter components 3 are vertically installed in the cavities on both sides of the partition 2, which are a first filter component 31 and a second filter component 32 respectively. The left and right sides of the filter component 3 are both vents, and the lower end of the filter component 3 and the vent near the partition 2 are sealed by a sealing plate 4. An air inlet pipe 5 and an air outlet pipe 6 connected to the vent near the partition 2 are also installed on the upper part of the shell 1. The right vent of the first filter component 31 is connected to the air inlet pipe 5, the left vent of the first filter component 31 is connected to the inside of the cavity, the left vent of the second filter component 32 is connected to the outlet pipe 6, and the right vent of the second filter component 32 is connected to the inside of the cavity. A drainage component 7 is installed at the lower end of the shell 1.

[0021] The filter assembly 3 includes a polymer filter assembly 301 and a chemical adsorption layer 302 located between two polymer filter layers 301 . The chemical adsorption layer 302 is filled with an adsorbent, which can effectively remove impurities in hydrogen.

[0022] The drainage assembly 7 includes a plunger 71 embedded in the bottom of the shell 1 and an outlet valve 72 installed on the plunger 71. The plunger 71 is provided with a through hole communicating with the internal cavity of the shell 1. The outlet valve 72 is arranged at the through hole. The outlet valve 72 is conical in shape. The upper part of the outlet valve 72 extends in all directions and is provided with a blocking part for blocking the through hole.

[0023] When the pre-hydrogen filter of a hydrogen fuel cell of the utility model is working, the hydrogen fuel gas is introduced from the air intake pipe 5, and first enters the right air vent of the first filter component 31. Since the lower end of the air vent is sealed, the hydrogen fuel moves horizontally toward the first filter component 31. Due to the chemical adsorbent filled inside the filter component and the unique filter layer structure, the impurities in the hydrogen can be effectively removed. After one treatment, the gas enters the internal cavity of the shell 1 from the left air vent of the first filter component 31. In this process, since the gas introduced into the air intake pipe 5 is high pressure, the pressure is reduced after coming out of the filter component 3, and the pressure When the pressure is reduced, water may precipitate and flow down along the inner wall of the shell 1. When the gas in the cavity accumulates to a certain extent, the gas will enter from the right vent of the second filter component 32, and be filtered twice through the second filter component 32. After filtration, it enters the air outlet pipe 6 from the left vent of the second filter component 32. The gas treatment is completed. When the water in the cavity accumulates to a certain extent, the outlet valve 72 is pressed from the bottom, the outlet valve 72 is lifted, and the water flows out from the through hole on the plunger 71. During the gas treatment process, the drainage component 7 is in a closed state. Under the action of gravity and water pressure, the blocking parts around the upper part of the outlet valve 72 will block the through hole.

[0024] The utility model discloses a hydrogen fuel cell pre-filter, which can effectively remove impurities in hydrogen, perform secondary filtration in a limited space, have good treatment effect, can collect and discharge water, and solve the problems of high reversibility and low selectivity in the existing hydrogen filtration process.

[0025] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hydrogen fuel cell pre-filter, characterized in that: It includes a shell, a partition, a filter assembly, a sealing plate, an air inlet pipe, an air outlet pipe and a drainage assembly. A partition is installed on the upper part of the cavity of the shell, and the partition divides the upper part of the cavity into two parts. Filter assemblies are vertically installed in the cavities on both sides of the partition. There are air vents on the left and right sides of the filter assembly. The lower end of the filter assembly and the air vent near the partition are sealed by a sealing plate. An air inlet pipe and an air outlet pipe connected to the air vent near the partition are also installed on the upper part of the shell, and a drainage assembly is installed at the lower end of the shell.

2. A hydrogen fuel cell pre-filter according to claim 1, characterized in that: The filter assembly comprises a polymer filter assembly and a chemical adsorption layer located between two polymer filter layers, and the chemical adsorption layer is filled with an adsorbent.

3. A hydrogen fuel cell pre-filter according to claim 1, characterized in that: The drainage assembly includes a plunger embedded in the bottom of the shell and an outlet valve installed on the plunger. The plunger is provided with a through hole communicating with the internal cavity of the shell. The outlet valve is arranged at the through hole. The outlet valve is conical in shape. The upper part of the outlet valve extends in all directions and is provided with a blocking part for blocking the through hole.

4. A hydrogen fuel cell pre-filter according to claim 1, characterized in that: The shell is installed in the air, and a hanging ear for hoisting is arranged on the top of the shell.

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