CN112452623A - Membrane electrode coating machine and fresh air system thereof - Google Patents
Membrane electrode coating machine and fresh air system thereof Download PDFInfo
- Publication number
- CN112452623A CN112452623A CN202011505127.0A CN202011505127A CN112452623A CN 112452623 A CN112452623 A CN 112452623A CN 202011505127 A CN202011505127 A CN 202011505127A CN 112452623 A CN112452623 A CN 112452623A
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- Prior art keywords
- air
- air inlet
- exhaust
- noble metal
- fresh air
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/60—Ventilation arrangements specially adapted therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8825—Methods for deposition of the catalytic active composition
- H01M4/886—Powder spraying, e.g. wet or dry powder spraying, plasma spraying
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention relates to a fresh air system of a membrane electrode coating machine, which comprises an air inlet pipe, an air outlet and an air outlet pipe, wherein one end of the air outlet pipe is communicated with the air outlet, the other end of the air outlet pipe is communicated with the external environment, at least one precious metal adsorption device is also connected in series in the air outlet pipe, and an adsorbent used for adsorbing precious metals is arranged in the precious metal adsorption device. The air resistance in the exhaust pipe can be obviously increased after the noble metal absorbing device is arranged in the exhaust pipe, so that the wind speed and wind power at the air outlet are obviously reduced, and the noble metal brought into the exhaust pipe by the airflow at the air outlet is also obviously reduced; meanwhile, the noble metal adsorption device can further adsorb the noble metal entering the exhaust pipe, so that the noble metal is prevented from being discharged into the external environment, the waste of the noble metal is avoided, and the pollution of the noble metal to the environment is also avoided. The invention also discloses a film electrode spraying machine.
Description
Technical Field
The invention relates to the technical field of membrane electrode design and production, in particular to a membrane electrode spraying machine and a fresh air system thereof.
Background
The membrane electrode is a core component of a fuel cell and a PEM electrolyzer, and comprises a proton exchange membrane, a noble metal catalyst and a frame, wherein the manufacturing process is to spray noble metal catalyst slurry onto the proton exchange membrane by adopting a spraying method, and then form a membrane electrode whole after the noble metal catalyst slurry is hot-pressed with the frame.
The manufacturing process of the membrane electrode is carried out in a membrane electrode spraying machine, the membrane electrode spraying machine comprises a closed working room, and transparent glass and an openable door body are arranged on the closed working room, so that workers can conveniently observe the internal condition of the working room in real time and can intervene at any time; a rectangular vacuum adsorption platform is arranged in the workshop to fix the proton exchange membrane through vacuum adsorption force, the slurry supply system is connected with ultrasonic spraying equipment in the closed workshop, and noble metal catalysts are sprayed on the proton exchange membrane on the vacuum adsorption platform through the ultrasonic spraying equipment; the top of the closed workshop is provided with an air inlet pipeline, the periphery of the vacuum adsorption platform is provided with air outlets, the air outlets are communicated with the air outlet pipeline, the air inlet pipeline, the air outlets and the air outlet pipeline form a fresh air system for providing fresh air into the closed workshop, and the fresh air system can accelerate the drying and fixing of the noble metal catalyst on the proton exchange membrane.
Noble metals are expensive, and waste needs to be avoided particularly in the spraying process, however, the wind power at the air outlet of a fresh air system in the existing membrane electrode spraying machine is large, and the strong wind easily sucks the un-dried noble metal catalyst on the proton exchange membrane into the air outlet, so that not only can the environment be polluted, but also the waste of noble metal materials is caused, and the production cost of the membrane electrode is improved.
Therefore, how to not only avoid the waste of the noble metal catalyst, but also effectively protect the environment is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
One of the purposes of the invention is to provide a fresh air system of a membrane electrode coating machine, so that waste of precious metal catalysts can be avoided, and environmental pollution can be avoided.
The invention also aims to provide a membrane electrode spraying machine with the fresh air system.
In order to achieve the purpose, the fresh air system of the membrane electrode coating machine comprises an air inlet pipe, an air outlet and an air outlet pipe, wherein one end of the air outlet pipe is communicated with the air outlet, the other end of the air outlet pipe is communicated with the external environment, at least one precious metal adsorption device is further connected in series in the air outlet pipe, and an adsorbent used for adsorbing precious metals is arranged in the precious metal adsorption device.
Preferably, an exhaust scattering device for scattering the airflow is further arranged in the exhaust port.
Preferably, the air exhaust scattering device is an air exhaust grid capable of covering the air outlet, a plurality of grid bars are arranged on the air exhaust grid, and gaps between every two adjacent grid bars are used for exhausting air.
Preferably, the air exhaust scattering device is an air exhaust pore plate capable of covering the air outlet, and the through hole formed in the air exhaust pore plate is used for exhausting air.
Preferably, the outlet of the air inlet pipe is called as an air inlet, and the air inlet is also provided with an air inlet scattering device for scattering air flow.
Preferably, the air inlet is circular, a circular installation part located at the center of a circle is arranged at the position of the air inlet, a circle of fan-shaped air deflectors with adjustable angles are arranged in the circumferential direction of the circular installation part, and the fan-shaped air deflectors form a louver type air inlet scattering device.
Preferably, the air inlet dispersing device is an air inlet grille capable of covering the air inlet, a plurality of grid bars are arranged on the air inlet grille, and gaps between every two adjacent grid bars are used for air inlet.
Preferably, the air inlet dispersing device is an air inlet pore plate capable of covering the air inlet, and through holes formed in the air inlet pore plate are used for air inlet.
Preferably, a cartridge opening is formed in a shell of the precious metal adsorption device, a placing plate is detachably inserted in the cartridge opening and used for placing the adsorbent.
The membrane electrode spraying machine disclosed by the invention comprises a closed working room, wherein a vacuum adsorption platform for adsorbing a proton exchange membrane is arranged in the closed working room, in addition, the membrane electrode spraying machine also comprises any one of the fresh air systems disclosed in the above, wherein an air outlet is arranged around the bottom of the vacuum adsorption platform.
Preferably, the air inlet pipe is arranged at the top of the closed workshop.
Preferably, the vacuum adsorption platform is a quadrangular frustum pyramid with the bottom area larger than the top area.
In the fresh air system of the membrane electrode spraying machine disclosed by the invention, one or more precious metal adsorption devices are connected in series in the exhaust pipe, and an adsorption plate for adsorbing precious metals is arranged in each precious metal adsorption device.
The air resistance in the exhaust pipe can be obviously increased after the noble metal absorbing device is arranged in the exhaust pipe, so that the wind speed and wind power at the air outlet are obviously reduced, and the noble metal brought into the exhaust pipe by the airflow at the air outlet is also obviously reduced; meanwhile, the noble metal adsorption device can further adsorb the noble metal entering the exhaust pipe, so that the noble metal is prevented from being discharged into the external environment, the waste of the noble metal is avoided, and the pollution of the noble metal to the environment is also avoided.
Drawings
FIG. 1 is a schematic front view of a membrane electrode applicator disclosed in an embodiment of the present invention;
FIG. 2 is a schematic view of another angle configuration of the membrane electrode applicator disclosed in FIG. 1;
fig. 3 is a schematic structural view of an air inlet duct disclosed in the embodiment of the present invention;
fig. 4 is a schematic view of the inlet of the air inlet duct disclosed in fig. 3;
FIG. 5 is a schematic top view of a vacuum chuck stage according to an embodiment of the present invention;
fig. 6 is a schematic view of a position relationship between the intake air scattering device and the vacuum adsorption platform disclosed in the embodiment of the present invention.
The device comprises a membrane electrode spraying machine 1, an air inlet pipe 11, an exhaust pipe 12, a precious metal adsorption device 13, a closed workshop 14, a vacuum adsorption platform 15, an exhaust grille 16, a grille 161, a circular installation part 111 and a fan-shaped air deflector 112.
Detailed Description
One of the cores of the invention is to provide a fresh air system of the membrane electrode spraying machine, so that the waste of the noble metal catalyst can be avoided, and the environmental pollution can be avoided.
The other core of the invention is to provide a membrane electrode spraying machine with the fresh air system.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 6, the fresh air system of the membrane electrode coating machine 1 disclosed in the embodiment of the present invention includes an air inlet pipe 11, an air outlet, and an air outlet pipe 12, and as can be seen from fig. 1 and 2, the air inlet pipe 11 extends into the enclosed working room 14 of the membrane electrode coating machine to provide fresh air into the enclosed working room 14, so as to achieve the effect of accelerating the drying speed of the noble metal catalyst layer on the proton exchange membrane; compared with the prior art in which the exhaust outlet is actually located in the closed workshop 14 and is arranged around the vacuum adsorption platform 15 in the closed workshop 14, the exhaust pipe 12 is used for exhausting the gas entering the exhaust outlet, in the fresh air system of the membrane electrode spraying machine disclosed in this embodiment, at least one precious metal adsorption device 13 is further connected in series in the exhaust pipe 12, and as shown in fig. 1 and fig. 2, an adsorbent for adsorbing precious metal is arranged in the precious metal adsorption device 13.
Those skilled in the art can understand that the arrangement of the precious metal adsorption device 13 in the exhaust duct 12 can significantly increase the wind resistance in the exhaust duct 12, so that the wind speed and wind power at the exhaust port are significantly reduced, and the precious metal brought into the exhaust duct 12 by the airflow at the exhaust port is also significantly reduced; meanwhile, the precious metal adsorption device 13 can further adsorb the precious metal entering the exhaust pipe 12, so that the precious metal is prevented from being exhausted to the external environment, the precious metal waste is avoided, and the pollution of the precious metal to the environment is avoided.
The noble metal adsorbent (silica gel sulfydryl) is a known material in the art and can be directly purchased from the market, and meanwhile, the existing patent documents (such as the patent document with the publication number of CN 102366716A) also disclose the noble metal adsorbent and the preparation method of the noble metal adsorbent, so detailed descriptions on the specific components and the preparation method of the noble metal adsorbent are omitted herein.
Referring to fig. 1 and 2, in the precious metal adsorbing device 13 disclosed in this embodiment, a housing is provided with a mounting opening, a placing plate is detachably mounted in the mounting opening, the placing plate is used for placing an adsorbent, and after the adsorbing efficiency of the adsorbent is reduced, a new adsorbent can be placed by detaching the placing plate.
In order to further improve the adsorption effect, the placing plates can be arranged in a multilayer mode, and each layer of placing plate is provided with one layer of adsorbent.
In addition, a plate with a noble metal adsorption function may be directly inserted into the insertion opening, for example, a noble metal ion adsorption resin plate prepared in patent document with publication number "CN 103586005A" may be adopted, and the resin plate may be detachably inserted into the insertion opening to achieve the purpose of recovering noble metals and reducing the air outlet strength.
In order to further optimize the scheme in the above embodiment, the fresh air system disclosed in this embodiment further includes an exhaust dispersing device for dispersing the airflow in the exhaust port, and the exhaust dispersing device can divide the exhaust into multiple strands of minute and soft airflows to enter the exhaust port, so as to prevent the un-dried noble metal catalyst on the proton exchange membrane from being sucked into the exhaust pipe 12 due to the excessive wind force at the exhaust port. The matching of the exhaust scattering device and the precious metal adsorption device 13 can also improve the production quality of the membrane electrode.
Referring to fig. 6, in an embodiment, the exhaust dispersing device is an exhaust grille 16 capable of covering the exhaust opening, the exhaust grille 16 is provided with a plurality of bars 161, a gap between two adjacent bars 161 is used for exhausting air, and the wind power at the exhaust opening can be effectively reduced by the dispersing function of the bars 161, as an optimized embodiment, the angle of the bars 161 can be adjusted to realize the adjustment of the exhaust wind power;
in addition, the air exhaust scattering device can also be an air exhaust pore plate capable of covering the air exhaust outlet, the through holes formed in the air exhaust pore plate are used for exhausting air, and the wind power at the air exhaust outlet can be effectively reduced through the scattering effect of the through holes.
As shown in fig. 1 and 2, the outlet of the air inlet pipe 11 is called an air inlet, and in fact, the large air flow impact at the air inlet can also blow away the un-dried noble metal catalyst on the proton exchange membrane, or cause the noble metal catalyst coating on the surface of the proton exchange membrane to be not uniform enough; in order to solve the problem, the fresh air system disclosed in this embodiment further includes an air inlet scattering device for scattering air flow at the air inlet, and the air inlet scattering device can divide the air inlet into multiple strands of tiny and soft air flows to enter the closed workshop 14, so as to avoid blowing away the un-dried noble metal catalyst on the proton exchange membrane due to the excessive wind force at the air inlet, or affecting the uniformity of the noble metal catalyst coating on the surface of the proton exchange membrane. The matching of the air inlet scattering device, the air exhaust scattering device and the precious metal adsorption device 13 can further improve the production quality of the membrane electrode.
Referring to fig. 3 and 4, in an embodiment, the air inlet is circular, a circular mounting portion 111 is disposed at the position of the center of the circle, a circle of fan-shaped air deflectors 112 with adjustable angles are disposed along the circumferential direction of the circular mounting portion 111, and all the fan-shaped air deflectors 112 form a louver-type air inlet scattering device; when all the fan-shaped air deflectors 112 are located on the same plane, the air inlets can be just closed by the air deflectors, the fan-shaped air deflectors 112 are adjusted to be in an inclined state, two adjacent air deflectors are staggered, and as shown in fig. 3, gaps between the two staggered air deflectors are used for air inlet; the inclination angle of the fan-shaped air deflectors 112 can be adjusted, so that the gap formed between two adjacent air deflectors can be changed, and the size of the inlet air force can be adjusted.
Of course, the air inlet scattering device can also be an air inlet grille capable of covering the air inlet, a plurality of grid bars 161 are arranged on the air inlet grille, and a gap between every two adjacent grid bars 161 is used for air inlet; or the air inlet dispersing device is an air inlet pore plate capable of covering the air inlet, and the through holes formed in the air inlet pore plate are used for air inlet.
The embodiment of the invention also discloses a membrane electrode spraying machine which comprises a closed working room 14, wherein a vacuum adsorption platform 15 for adsorbing a proton exchange membrane is arranged in the closed working room 14, the membrane electrode spraying machine is also provided with the fresh air system disclosed in any one of the embodiments, and an air outlet in the fresh air system is arranged around the bottom of the vacuum adsorption platform 15.
Referring to fig. 1 and 2, the air inlet pipe 11 is preferably disposed at the top of the closed work room 14, but the air inlet pipe 11 may be disposed at other positions of the closed work room 14, but it is required to ensure that the air inlet of the air inlet pipe 11 can blow air to the vacuum adsorption platform 15, so as to accelerate the drying speed of the precious metal catalyst layer on the proton exchange membrane.
As is known, in order to ensure that the surface of the proton exchange membrane is coated with a precious metal catalyst, the precious metal catalyst is usually left at the edge of the vacuum adsorption platform 15, the existing vacuum adsorption platform 15 is cuboid or cube, the redundant precious metal catalyst at the edge can only be adhered with a membrane in advance, and the membrane is torn after being sprayed, so that the recovery method is not only tedious, but also brings other impurities on the membrane;
in this embodiment, the vacuum adsorption platform 15 is designed to be square frustum-shaped, the bottom area of the square frustum is larger than the top area, the top surface of the square frustum is equal to or substantially equal to the area of the proton exchange membrane, so the redundant precious metal catalyst will be sprayed on the inclined surface of the square frustum, and the bottom of the vacuum adsorption platform is just surrounded by an air outlet, so the redundant precious metal catalyst will slide down to the air outlet along the inclined surface, and enter the exhaust pipe 12 through the air outlet, and finally be adsorbed and recovered by the precious metal adsorption device 13.
It can be seen that after the vacuum adsorption platform 15 is changed into a quadrangular frustum pyramid shape, the redundant precious metal catalyst will automatically slide down to the air outlet along the inclined plane of the quadrangular frustum pyramid, and finally be recovered by the precious metal adsorption device 13.
The membrane electrode coating machine and the fresh air system thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (12)
1. The utility model provides a membrane electrode flush coater's new trend system, includes air-supply line (11), air exit and exhaust pipe (12), the one end of exhaust pipe (12) with the air exit intercommunication, the other end and external environment intercommunication, its characterized in that, it has at least one noble metal adsorption equipment (13) still to establish ties in exhaust pipe (12), be provided with the adsorbent that is used for adsorbing the noble metal in noble metal adsorption equipment (13).
2. The fresh air system as claimed in claim 1, wherein an exhaust air dispersing device for dispersing the air flow is further disposed in the exhaust port.
3. The fresh air system as claimed in claim 2, wherein the exhaust dissipation device is an exhaust grille (16) capable of covering the exhaust port, a plurality of grid bars (161) are arranged on the exhaust grille (16), and a gap between two adjacent grid bars (161) is used for exhausting air.
4. The fresh air system as claimed in claim 2, wherein the air exhaust diffuser is an air exhaust hole plate capable of covering the air outlet, and through holes formed in the air exhaust hole plate are used for air exhaust.
5. The fresh air system as claimed in any one of claims 1 to 4, wherein the outlet of the air inlet pipe (11) is referred to as an air inlet, and an air inlet breaking device for breaking up the air flow is further arranged at the air inlet.
6. The fresh air system as claimed in claim 5, wherein the air inlet is circular, a circular mounting portion (111) is arranged at the position of the air inlet, a circle of fan-shaped air deflectors (112) with adjustable angles are arranged along the circumferential direction of the circular mounting portion (111), and the fan-shaped air deflectors (112) form a louver type air inlet scattering device.
7. The fresh air system as claimed in claim 5, wherein the air inlet dispersing device is an air inlet grille capable of covering the air inlet, a plurality of bars (161) are arranged on the air inlet grille, and a gap between two adjacent bars (161) is used for air inlet.
8. The fresh air system as claimed in claim 5, wherein the air inlet dispersing device is an air inlet hole plate capable of covering the air inlet, and through holes formed in the air inlet hole plate are used for air inlet.
9. The fresh air system as claimed in claim 1, wherein a housing of the precious metal adsorbing device (13) is provided with a plug-in opening, and a placing plate is detachably inserted in the plug-in opening and used for placing the adsorbent.
10. A membrane electrode spray coater comprising a closed workshop (14), wherein a vacuum adsorption platform (15) for adsorbing a proton exchange membrane is arranged in the closed workshop (14), characterized by further comprising a fresh air system of the membrane electrode spray coater according to any one of claims 1 to 9, wherein the air outlet is arranged around the bottom of the vacuum adsorption platform (15).
11. The fresh air system as claimed in claim 10, wherein the air inlet duct (11) is arranged on top of the closed workroom (14).
12. The fresh air system as claimed in claim 10, wherein the vacuum suction platform (15) is a rectangular prism having a bottom area larger than a top area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011505127.0A CN112452623A (en) | 2020-12-18 | 2020-12-18 | Membrane electrode coating machine and fresh air system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011505127.0A CN112452623A (en) | 2020-12-18 | 2020-12-18 | Membrane electrode coating machine and fresh air system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112452623A true CN112452623A (en) | 2021-03-09 |
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| CN202011505127.0A Pending CN112452623A (en) | 2020-12-18 | 2020-12-18 | Membrane electrode coating machine and fresh air system thereof |
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Application publication date: 20210309 |