Fuel cell air filter applied to marine environment

Abstract

The utility model relates to a fuel cell air filter applied to a marine environment, which comprises a shell provided with an air inlet and an air outlet, and a cyclone separator, a salt mist electrostatic trapping layer and a physical and chemical mixed filtering layer are sequentially arranged in the shell along the direction from the air inlet to the air outlet. And a hydrophilic adsorption layer is arranged on the shell wall of the peripheral part of the cyclone separator. The device is provided with a suction type cyclone separation structure, solid and liquid particles in gas are separated out by centrifugal force generated around a rotating structure after air is passively sucked, a filtering structure with an electrostatic trapping salt mist layer is arranged, and efficient salt mist filtering is achieved.

Description

Technical Field

[0001] The utility model relates to a fuel cell air filter applied to a marine environment. Background Art

[0002] Hydrogen energy is a secondary energy source with abundant sources, green and low carbon, and wide applications. It is of great significance to build a clean, low-carbon, safe and efficient energy system and achieve the goals of carbon peak and carbon neutrality. Fuel cells are a technical means to achieve efficient power generation of hydrogen energy. They are a device that converts chemical energy stored in fuel into electrical energy. They are considered to be one of the most promising power generation technologies in the 21st century and are hailed as the fourth generation of power generation technology after thermal power, hydropower and nuclear power. It has a wide range of applications, not only in small backup power supplies, drones, automobiles and other mobile transportation fields, but also in distributed power generation fields of different sizes and ship power systems.

[0003] In recent years, my country's fuel cell vehicles have shown rapid development, while the application of fuel cells in ships is in its infancy. In fact, ships should also be the focus of carbon reduction. According to relevant data, carbon emissions from the international shipping industry have exceeded 1 billion tons, accounting for 2.5% of the world's CO 2 3% of total emissions, an increase of 30% since 1990, so the shipping industry's emissions reduction is imminent, and the new regulations of the International Maritime Organization (IMO) on short-term measures to reduce greenhouse gas emissions have come into effect and will be fully implemented on January 1, 2023. Fuel cells, as another important electrochemical energy source, have important advantages such as high power density, good thermal management and safety, and fast energy replenishment compared to secondary batteries such as lithium-ion batteries. They are recognized at home and abroad as one of the ideal power sources for electric ships.

[0004] The salt in the ocean air mainly exists in the form of aerosols, usually called salt spray. The formation principle of the salt spray environment in the marine environment is mentioned in the theory of seawater agitation. The salt spray in the marine atmosphere mainly comes from the marine salt spray aerosol particles produced by seawater. When the fuel cell is used in the marine environment, the high-salt spray air in the marine atmosphere enters the fuel cell, and the salt spray molecules such as sodium chloride in the air enter the membrane electrode of the fuel cell. As the water produced by the reaction continues to diffuse and migrate inside the battery, the proton conductivity in the membrane electrode decreases, hindering the electrochemical reaction, and the performance rapidly declines. In order to solve this problem, improve the performance of the fuel cell, extend the service life of the fuel cell, and reduce the operating cost of the fuel cell, a fuel cell filter with salt spray filtration function is developed and designed for the marine use environment. Before the air at the cathode of the fuel cell enters the fuel cell stack, the salt spray in the air is removed to ensure the reliability and durability of the fuel cell in ship applications. Utility Model Content

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a fuel cell air filter for use in a marine environment.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a fuel cell air filter applied to a marine environment, comprising a shell provided with an air inlet and an air outlet, wherein a cyclone separator, a salt mist electrostatic collection layer, and a physical and chemical mixed filtration layer are sequentially arranged inside the shell along the direction from the air inlet to the air outlet, and a hydrophilic adsorption layer is arranged on the shell wall of the outer peripheral portion of the cyclone separator.

[0007] Preferably, the salt mist electrostatic collection layer divides the interior of the shell into a lower chamber and an upper chamber, the cyclone separator and the air inlet are installed in the lower chamber, and the physical and chemical mixed filter layer and the air outlet are installed in the upper chamber.

[0008] Preferably, the air inlet is arranged at the lower periphery of the lower chamber, and the air outlet is arranged at the middle top of the upper chamber.

[0009] Preferably, the cyclone separator includes a shaft portion vertically fixed in the lower chamber, a vertically extending spiral blade is fixed to an outer periphery of the shaft portion, and the adsorption layer is arranged on an inner peripheral wall of the lower chamber.

[0010] Preferably, the salt mist electrostatic capture layer comprises a first salt mist capture filter layer and a second salt mist capture filter layer, the first salt mist capture filter layer and the second salt mist capture filter layer are stacked up and down, and the two have different pore structures.

[0011] Preferably, the filter inlet of the physical and chemical mixed filter layer is located at its periphery, and the filter outlet is connected to the air outlet.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the device has an inhalation-type cyclone separation structure, which utilizes the centrifugal force generated by the passive inhalation of air around the rotating structure to separate the solid and liquid particles in the gas, and arranges a filtering structure with an electrostatically captured salt mist layer to achieve efficient salt mist filtration.

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. 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 application belongs.

[0017] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. 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 "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0018] like Figure 1 As shown, this embodiment provides a fuel cell air filter for use in a marine environment, comprising a shell 3 provided with an air inlet 1 and an air outlet 2, wherein a cyclone separator 4, a salt mist electrostatic collection layer, and a physical and chemical mixed filtration layer 12 are sequentially arranged inside the shell along the direction from the air inlet to the air outlet, and a hydrophilic adsorption layer 5 is arranged on the shell wall of the outer peripheral portion of the cyclone separator.

[0019] In the embodiment of the utility model, the salt mist electrostatic collection layer divides the interior of the shell into a lower chamber 6 and an upper chamber 7, the cyclone separator and the air inlet are installed in the lower chamber, and the physical and chemical mixed filter layer and the air outlet are installed in the upper chamber.

[0020] In an embodiment of the utility model, the air inlet is arranged at the lower periphery of the lower chamber, and the air outlet is arranged at the middle top of the upper chamber.

[0021] In the embodiment of the utility model, the cyclone separator includes a shaft portion 8 vertically fixed in the lower chamber, the outer periphery of the shaft portion is fixedly provided with vertically extending spiral blades 9, and the adsorption layer is arranged on the inner peripheral wall of the lower chamber.

[0022] In the embodiment of the utility model, the salt fog electrostatic collection layer includes a first salt fog collection filter layer 10 and a second salt fog collection filter layer 11, the first salt fog collection filter layer and the second salt fog collection filter layer are stacked up and down, and the two have different pore structures.

[0023] In an embodiment of the utility model, the filter inlet of the physical and chemical mixed filter layer is located at its periphery, and the filter outlet is connected to the air outlet.

[0024] In the embodiment of the utility model, the first salt mist capture filter layer and the second salt mist capture filter layer use ultra-fine electrostatic fiber cloth with a special capillary structure to achieve electrostatic salt mist capture.

[0025] In the embodiment of the utility model, the material of the adsorption layer is polyacrylamide or other materials.

[0026] In the embodiment of the utility model, the physical and chemical mixed filter layer is the filter layer used in the fuel cell dedicated filter, which includes a physical filter element and a chemical filter element. The physical filter element is mainly used to filter particulate pollutants in the air, and non-woven fabric is mainly used as the filter element material. The chemical filter element is mainly used to filter harmful chemical gases in the air, such as NOx, SO 2 NH 3 And CO, etc. This filter element uses activated carbon impregnated with chemical adsorbents as the filter element material, and is composed of a multi-layer structure to adsorb different chemical pollutants.

[0027] In the embodiment of the utility model, the working principle of the fuel cell air filter applied to the marine environment is as follows: the filter is connected to the fuel cell air compressor, the air outlet of the filter is connected to the air intake of the air compressor, under the action of the air compressor, the air containing salt mist droplets or particles enters the filter through the air inlet, forms a rotating airflow and accelerates through the spiral blades, the larger salt mist particles or salt mist droplets are separated due to the centrifugal effect, and are thrown to the adsorption layer for adsorption, the air after preliminary purification passes through the first salt mist capture filter layer and the second salt mist capture filter layer to further adsorb and capture fine particles and droplets, wherein the first salt mist capture filter layer and the second salt mist capture filter layer have different aperture structures. The air after salt mist filtration passes through the physical and chemical mixed filter layer to filter the chemical pollutants that may exist in the air. Enter the air compressor from the air outlet of the filter, the filtered air removes the salt mist droplets and salt mist particles, solid pollutants and chemical pollutants, protects the fuel cell membrane electrode from pollution, and prolongs the service life of the fuel cell.

[0028] The present invention is different from the traditional land-based fuel cell filter in that the traditional land-based fuel cell filter mainly considers filtering pollutants in the air that have a poisoning effect on the catalyst, such as CO, SO 2 , H 2 S, NO x The salt mist in the air of the marine environment has a great impact on the membrane of the fuel cell, because the sodium chloride in the salt mist will cause the conductivity of the proton exchange membrane to decrease, causing the efficiency and performance of the fuel cell to continue to deteriorate. The utility model provides a filter device that can filter salt mist droplets and particles in the air. The device has an inhalation cyclone separation structure, which is a centrifugal force generated by the air after passive inhalation around the rotating structure to separate the solid and liquid particles in the gas, and arranges a filter structure with an electrostatically captured salt mist layer to achieve efficient salt mist filtration. Provide a reliable air filter for the application of fuel cells in the marine ship transportation industry.

[0029] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A fuel cell air filter for use in a marine environment, characterized in that: The invention comprises a shell body provided with an air inlet and an air outlet, wherein a cyclone separator, a salt mist electrostatic collection layer, and a physical and chemical mixed filtration layer are sequentially arranged inside the shell body along the direction from the air inlet to the air outlet, and a hydrophilic adsorption layer is arranged on the shell wall of the outer peripheral part of the cyclone separator.

2. The fuel cell air filter for use in a marine environment according to claim 1, characterized in that: The salt mist electrostatic collection layer divides the interior of the shell into a lower chamber and an upper chamber, the cyclone separator and the air inlet are installed in the lower chamber, and the physical and chemical mixed filter layer and the air outlet are installed in the upper chamber.

3. The fuel cell air filter for use in a marine environment according to claim 2, characterized in that: The air inlet is arranged at the lower periphery of the lower chamber, and the air outlet is arranged at the middle top of the upper chamber.

4. The fuel cell air filter for use in a marine environment according to claim 2, characterized in that: The cyclone separator comprises a shaft portion vertically fixed in the lower chamber, a vertically extending spiral blade is fixedly arranged on the outer periphery of the shaft portion, and the adsorption layer is arranged on the inner peripheral wall of the lower chamber.

5. The fuel cell air filter for use in a marine environment according to claim 2, characterized in that: The salt fog electrostatic capture layer comprises a first salt fog capture filter layer and a second salt fog capture filter layer, the first salt fog capture filter layer and the second salt fog capture filter layer are stacked up and down, and the two have different pore size structures.

6. The fuel cell air filter for use in a marine environment according to claim 2, characterized in that: The filter inlet of the physical and chemical mixed filter layer is located at the periphery thereof, and the filter outlet is connected to the air outlet.

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