CN116613358A - Closed high-pressure water electrolysis hydrogen production energy storage system - Google Patents
Closed high-pressure water electrolysis hydrogen production energy storage system Download PDFInfo
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- CN116613358A CN116613358A CN202310505095.1A CN202310505095A CN116613358A CN 116613358 A CN116613358 A CN 116613358A CN 202310505095 A CN202310505095 A CN 202310505095A CN 116613358 A CN116613358 A CN 116613358A
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 177
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 177
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 172
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 229910001868 water Inorganic materials 0.000 title claims abstract description 136
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 77
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 50
- 238000004146 energy storage Methods 0.000 title claims abstract description 28
- 238000003860 storage Methods 0.000 claims abstract description 95
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000001301 oxygen Substances 0.000 claims abstract description 69
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 69
- 239000000446 fuel Substances 0.000 claims abstract description 60
- 239000007789 gas Substances 0.000 claims abstract description 17
- 238000010248 power generation Methods 0.000 abstract description 22
- 239000006227 byproduct Substances 0.000 abstract description 3
- 239000012528 membrane Substances 0.000 description 44
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 229920000557 Nafion® Polymers 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- -1 hydrogen ions Chemical class 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
- C25B15/081—Supplying products to non-electrochemical reactors that are combined with the electrochemical cell, e.g. Sabatier reactor
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
-
- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
-
- 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
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
- H01M8/0656—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants by electrochemical means
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- Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Fuel Cell (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application belongs to the technical field of hydrogen energy, and discloses a closed high-pressure water electrolysis hydrogen production energy storage system which comprises a water electrolysis hydrogen production system, a hydrogen storage tank, an oxygen storage tank and a fuel cell; the air inlet of the hydrogen storage tank is communicated with the hydrogen outlet of the electrolytic water hydrogen production system, the air inlet of the oxygen storage tank is communicated with the oxygen outlet of the electrolytic water hydrogen production system, the air outlet of the hydrogen storage tank is communicated with the hydrogen side of the fuel cell, and the air outlet of the oxygen storage tank is communicated with the oxygen side of the fuel cell. The application omits expensive hydrogen compressors and other devices, improves the density of hydrogen storage and oxygen storage, and saves the cost of gas storage; the application simplifies the composition of the fuel cell power generation system; the closed system is provided, water generated by power generation of the fuel cell can be recycled and re-enter an electrolytic tank of the water electrolysis hydrogen production system for hydrogen production, and the water, hydrogen and oxygen are closed; meanwhile, the byproduct high-purity oxygen produced by water electrolysis can be directly utilized, and the power generation efficiency of the fuel cell is greatly improved.
Description
Technical Field
The application belongs to the technical field of hydrogen energy, and particularly relates to a closed high-pressure water electrolysis hydrogen production energy storage system.
Background
The hydrogen energy is the optimal choice for decarburization in the fields of traffic, electric power, construction, chemical industry and the like because of the energy attribute and the material attribute, and the renewable energy source hydrogen production can help the field which is difficult to decarburize to carry out economically feasible deep decarburization, and meanwhile, the long-period and large-scale storage of the renewable energy source can be realized in a hydrogen energy storage mode.
In the existing hydrogen energy storage system, only the energy storage mode of 'electrolytic water hydrogen production and fuel cell power generation' is generally used, and in order to improve the hydrogen storage density, a hydrogen compressor with high manufacturing cost is generally required to be configured, for example, in the patent application with publication number of CN114976157A, a hydrogen energy storage power station system is disclosed, and the system comprises an electrolytic water hydrogen production system, a power generation system, a hydrogen production auxiliary system, a heat recovery system, a heat dissipation system, a refrigeration system, a water supply/supplement system, a control system, a hydrogen storage system and a photovoltaic power generation system, and the working process is as follows: the photovoltaic power generation system and a grid-connected busbar of the commercial power are used as electric energy input of the electrolytic hydrogen production system, the electrolytic hydrogen production system converts electric energy into hydrogen, the hydrogen enters a hydrogen buffer tank through a hydrogen compressor and finally enters a hydrogen storage tank, the hydrogen storage tank is decompressed to input the hydrogen into a fuel cell stack for power generation by a fuel cell, and finally the electric energy enters an inversion boosting device of the fuel cell system to be integrated into busbar surfing. The storage and utilization functions of the electric energy are realized.
Meanwhile, the fuel cell using hydrogen is not directly connected with the electrolytic water to produce hydrogen, but is used as an intermediary through transportation; the fuel cell uses a conventional fuel cell power generation system, and an air compressor and a humidifier for hydrogen and air are required to be provided.
In summary, the existing hydrogen energy storage system structure needs to be provided with a hydrogen compressor, a humidifier and other devices, and is complex in structure and high in cost; in addition, existing hydrogen storage systems are non-closed, requiring additional water to be provided for electrolysis.
Disclosure of Invention
Aiming at the problems, the application provides a closed high-pressure water electrolysis hydrogen production energy storage system, which adopts the following technical scheme:
a closed high-pressure water electrolysis hydrogen production energy storage system comprises a water electrolysis hydrogen production system, a hydrogen storage tank, an oxygen storage tank and a fuel cell;
the hydrogen storage tank is communicated with the hydrogen outlet of the electrolytic water hydrogen production system, the oxygen storage tank is communicated with the oxygen outlet of the electrolytic water hydrogen production system, the hydrogen storage tank is communicated with the hydrogen side of the fuel cell, and the oxygen storage tank is communicated with the oxygen side of the fuel cell.
Further, the hydrogen production system further comprises a water storage tank, wherein the water outlet of the fuel cell is communicated with the inlet of the water storage tank, and the outlet of the water storage tank is communicated with the water inlet of the hydrogen production system.
Further, an air inlet of the hydrogen storage tank is communicated with a hydrogen outlet of the electrolyzed water hydrogen production system through a first pipeline.
Further, an air inlet of the oxygen storage tank is communicated with an oxygen outlet of the electrolyzed water hydrogen production system through a second pipeline.
Further, the gas outlet of the hydrogen storage tank is communicated with the hydrogen side of the fuel cell through a third pipeline, and a first pressure reducing valve is arranged on the third pipeline.
Further, the air outlet of the oxygen storage tank is communicated with the oxygen side of the fuel cell through a fourth pipeline, and a second pressure reducing valve is arranged on the fourth pipeline.
Further, the water outlet of the fuel cell is communicated with the inlet of the water storage tank through a fifth pipeline, and a first water pump is arranged on the fifth pipeline.
Further, an outlet of the water storage tank is communicated with a water inlet of the electrolytic water hydrogen production system through a sixth pipeline, and a second water pump is arranged on the sixth pipeline.
Further, the electrolytic water hydrogen production system is a high-pressure electrolytic water hydrogen production system.
The application has the beneficial effects that:
1. the application has simple structure, eliminates expensive hydrogen compressors and other equipment, improves the density of hydrogen storage and oxygen storage, and saves the cost of gas storage;
2. the application directly outputs hydrogen which can be used for the hydrogen storage pressure of the conventional hydrogen storage tank at present, and the oxygen side also adopts high pressure to prevent the hydrogen concentration in oxygen from being too high;
3. the application locally performs water electrolysis hydrogen production and fuel cell power generation on wind-solar renewable energy power generation, and long-distance transportation of hydrogen is not needed, thus saving transportation cost;
4. the application simplifies the composition of a fuel cell power generation system, provides a closed high-pressure water electrolysis hydrogen production energy storage system, and water generated by the fuel cell power generation can be recycled and re-enter an electrolytic tank of the water electrolysis hydrogen production system for hydrogen production, thereby realizing the sealing of water, hydrogen and oxygen; meanwhile, the byproduct high-purity oxygen produced by water electrolysis can be directly utilized, and the power generation efficiency of the fuel cell is greatly improved.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic diagram of a closed high-pressure electrolytic water hydrogen production energy storage system according to an embodiment of the application;
fig. 2 shows a schematic reaction principle of a proton exchange membrane water electrolysis hydrogen production system according to an embodiment of the application.
In the figure: 1. a hydrogen production system by water electrolysis; 2. a hydrogen storage tank; 3. an oxygen storage tank; 4. a fuel cell; 5. a water storage tank; 6. a first pipeline; 7. a second pipeline; 8. a third pipeline; 9. a fourth pipeline; 10. a first pressure reducing valve; 11. a second pressure reducing valve; 12. a fifth pipeline; 13. and a sixth pipeline.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that the terms "first," "second," and the like herein are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
The application provides a closed high-pressure water electrolysis hydrogen production energy storage system, which can directly output high-pressure hydrogen which can be used for the hydrogen storage pressure of the conventional hydrogen storage tank at present, and the oxygen side also adopts high pressure to prevent the hydrogen concentration in oxygen from being too high; and an expensive hydrogen compressor is omitted, the density of hydrogen storage and oxygen storage is improved, and the gas storage cost is saved.
As shown in fig. 1, a closed high-pressure water electrolysis hydrogen production energy storage system comprises a water electrolysis hydrogen production system 1, a high-pressure hydrogen storage tank 2, a high-pressure oxygen storage tank 3, a fuel cell 4 and a water storage tank 5.
The high-pressure hydrogen storage tank 2 is used for storing hydrogen generated by decomposition, and the high-pressure oxygen storage tank 3 is used for storing oxygen generated by decomposition.
The gas outlet of the high-pressure hydrogen storage tank 2 is communicated with the hydrogen side of the fuel cell 4, the gas outlet of the high-pressure oxygen storage tank 3 is communicated with the oxygen side of the fuel cell 4, the water outlet of the fuel cell 4 is communicated with the inlet of the water storage tank 5, and the outlet of the water storage tank 5 is communicated with the water inlet of the water electrolysis hydrogen production system 1.
For example, the gas inlet of the high-pressure hydrogen storage tank 2 communicates with the hydrogen outlet of the electrolyzed water hydrogen production system 1 through the first conduit 6.
For example, the air inlet of the high-pressure oxygen storage tank 3 is communicated with the oxygen outlet of the electrolyzed water hydrogen production system 1 through a second pipeline 7.
The electrolytic water hydrogen production system 1 adopts a proton exchange membrane with high pressure of more than 20MPa to electrolyze water to produce hydrogen, directly outputs hydrogen which can be used for the pressure of the conventional high-pressure hydrogen storage tank 2 at present, and adopts the high-pressure oxygen storage tank 3 at the oxygen side to prevent the hydrogen concentration in oxygen from being too high; and an expensive hydrogen compressor is omitted, the density of hydrogen storage and oxygen storage is improved, and the gas storage cost is saved.
For example, the water electrolysis hydrogen production system 1 may be a proton exchange membrane water electrolysis hydrogen production system 1, as shown in fig. 2, and the working reaction principle of the proton exchange membrane water electrolysis hydrogen production system 1 is specifically as follows: first, water is supplied to the anode where it is decomposed into oxygen (O 2 ) Protons (H) + ) And electrons (e) - ) Protons enter the cathode through the proton exchange membrane. Electrons flow from the anode, through a power supply circuit to the cathode, while the power supply provides a driving force (battery voltage). On the cathode side, the two protons and electrons recombine to produce hydrogen (H 2 ）。
The proton exchange membrane electrolytic cell chemical reaction equation is as follows:
the Oxygen Evolution Reaction (OER) of the anode takes place in particular as follows:
2H 2 O-4e - →4H + +O 2 ；
the cathodic Hydrogen Evolution Reaction (HER) is specifically as follows:
4H + +4e -- →2H 2 ；
total reaction endotherm: 2H (H) 2 O→2H 2 +O 2 Q, wherein Q is heat.
The proton exchange membrane has the main functions of isolating hydrogen and oxygen, preventing gas from reacting between anode and cathode channels and controlling proton exchange.
For example, the proton exchange membrane water electrolysis hydrogen production system 1 comprises a membrane electrode assembly, a current collector (gas-liquid diffusion layer), a proton exchange membrane, a sealing ring and a bipolar plate. Proton exchange membranes divide the cell into two half-cells (cathode and anode), bipolar plates being channels for supporting current collectors and membrane electrodes, transporting electrons and providing mass transport. The gas-liquid diffusion layer functions to provide an effective electrical contact between the electrocatalytic layer and the bipolar plate and to ensure gas/liquid transport therebetween. The gas-liquid diffusion layer needs to have a suitable porosity to facilitate transport of reactant water and removal of product gases, and an optimal pore size to balance competing processes of mass transfer in the diffusion layer and charge transfer in the electrocatalytic layer.
It should be noted that, the structure of the proton exchange membrane water electrolysis hydrogen production system 1 is only illustrated by way of example, and other structures may be adopted.
According to the closed high-pressure water electrolysis hydrogen production energy storage system, water electrolysis hydrogen production and fuel cell 4 power generation are carried out locally in wind-solar renewable energy power generation, long-distance transportation of hydrogen is not needed, and transportation cost is saved; meanwhile, water generated by power generation of the fuel cell 4 can be recycled and re-enter the electrolytic tank for hydrogen production, so that sealing of water, hydrogen and oxygen is realized, and the system is a semi-sealing system and can be used for energy storage of a photovoltaic field or a wind power plant and peak shaving of a power grid.
For example, the gas outlet of the high-pressure hydrogen tank 2 communicates with the hydrogen side of the fuel cell 4 through a third pipe 8, and the gas outlet of the high-pressure oxygen tank 3 communicates with the oxygen side of the fuel cell 4 through a fourth pipe 9.
The first pressure reducing valve 10 is arranged on the third pipeline 8, the second pressure reducing valve 11 is arranged on the fourth pipeline 9, the gas coming out of the high-pressure hydrogen storage tank 2 and the high-pressure oxygen storage tank 3 is high pressure, and the pressure is reduced before entering the fuel cell 4, so that the compression is not needed again, and the composition of the power generation system of the fuel cell 4 is simplified. And the pressure of hydrogen gas, oxygen gas, etc. entering the fuel cell 4 can be adjusted by the first pressure reducing valve 10 and the second pressure reducing valve 11.
For example, the fuel cell 4 is a proton exchange membrane fuel cell 4, the proton exchange membrane fuel cell 4 comprises an anode, a cathode and a proton exchange membrane, the proton exchange membrane is arranged between the anode and the cathode, the proton exchange membrane is responsible for transmitting hydrogen ions from the anode to the cathode, meanwhile, the mutual flow and channeling of hydrogen and oxygen are prevented, and the direct contact of two-pole gas is effectively avoided to generate combustion and explosion. The power generation process mainly comprises the steps of oxidizing reaction of hydrogen at an anode and reducing reaction of oxygen at a cathode, so that water generated by the oxidation-reduction reaction of hydrogen and oxygen in a galvanic pile is generated along with a large amount of heat, and electrons generated by the electrochemical reaction pass through an external circuit and output electric energy.
For example, the unit proton exchange membrane fuel cell 4 includes an anode plate, a membrane electrode assembly, and a cathode plate, wherein the membrane electrode assembly is composed of an anode diffusion layer, an anode catalytic layer, a proton exchange membrane, a cathode diffusion layer, and a cathode catalytic layer. The diffusion layer is mostly prepared from graphite and is used as a carrier for diffusing and transporting hydrogen and air to the catalytic layer. The cathode and anode catalytic layer mainly comprises a catalyst, wherein the catalyst is a solid metal compound carbon-based material, and is generally Pt/C. The proton exchange membrane serves as an electrolyte of the proton exchange membrane fuel cell 4 and is responsible for anode hydrogen ions to cathode diffusion, and meanwhile, the mutual flow of the two-pole gas is prevented. The membrane electrode assembly is sandwiched between the cathode and anode bipolar plates and pressed together, and a plurality of the membrane electrode assemblies are connected in series, thereby forming a stack of proton exchange membrane fuel cells 4.
The above-described proton exchange membrane fuel cell 4 is only an exemplary structure, and other structures may be adopted.
For example, the water outlet of the proton exchange membrane fuel cell 4 is communicated with the inlet of the water storage tank 5 through a fifth pipeline 12, a first water pump is arranged on the fifth pipeline 12, and water generated by the proton exchange membrane fuel cell 4 is conveyed to the water storage tank 5 through the first water pump.
For example, the outlet of the water storage tank 5 is communicated with the water inlet of the electrolytic water hydrogen production system 1 through a sixth pipeline 13, a second water pump is arranged on the sixth pipeline 13, and the water in the water storage tank 5 is conveyed to the proton exchange membrane fuel cell 4 through the second water pump.
The specific working process of the power generation working condition of the proton exchange membrane fuel cell 4 comprises the following steps: the hydrogen in the high-pressure hydrogen storage tank 2 is decompressed through a third pipeline 8 and then is conveyed to the proton exchange membrane fuel cell 4, the oxygen in the high-pressure oxygen storage tank 3 is decompressed through a fourth pipeline 9 and then is conveyed to the proton exchange membrane fuel cell 4, the proton exchange membrane fuel cell 4 combines the hydrogen and the oxygen to generate electric energy and pure water, the generated electric energy is stored, and the generated water is conveyed to the water storage tank 5 through a first water pump.
The hydrogen and the air of the conventional proton exchange membrane fuel cell 4 react, but the embodiment of the application can directly utilize the byproduct of the hydrogen production by the electrolytic water to prepare high-purity oxygen instead of the air, thereby greatly improving the power generation efficiency of the fuel cell 4.
In addition, the oxygen produced by the existing water electrolysis hydrogen production energy storage system is generally directly discharged into the atmosphere, so that waste is caused.
The specific working process of the proton exchange membrane water electrolysis hydrogen production system 1 comprises the following steps: the water in the water storage tank 5 is conveyed to the electrolytic tank of the proton exchange membrane water electrolysis hydrogen production system 1 through a second water pump, the water electrolysis mode of the proton exchange membrane water electrolysis hydrogen production system 1 is started, hydrogen and oxygen are produced by electrolysis of water, high-pressure hydrogen is conveyed to the high-pressure hydrogen storage tank 2 for storage through the first pipeline 6, and high-pressure oxygen is conveyed to the high-pressure oxygen storage tank 3 for storage through the second pipeline 7.
According to the closed high-pressure electrolytic water hydrogen production energy storage system, water generated by power generation of the fuel cell 4 is stored through the water storage tank 5 and can be recycled and re-enter the electrolytic tank of the electrolytic water hydrogen production system 1 to be used for hydrogen production, so that water, hydrogen and oxygen are closed.
For example, the proton exchange membrane according to the embodiment of the present application may be a perfluorosulfonic acid membrane. The Nafion film is one of perfluorinated sulfonic acid films, and the Nafion film polymer has a polytetrafluoroethylene structure and high bond energy of C-F bonds, so that the Nafion film has excellent mechanical properties and chemical stability. Nafion membranes can be divided into two regions: the hydrophilic sulfonic acid group on the side chain plays a role in proton conduction through the membrane and H 3 O + Binding and dissociationRealize proton transfer, the proton transfer has realized the electric conduction of the positive and negative poles through the proton exchange membrane.
For example, a first pressure gauge is arranged on the high-pressure hydrogen storage tank 2, a second pressure gauge is arranged on the high-pressure oxygen storage tank 3, and the hydrogen pressure and the oxygen pressure are monitored respectively through the first pressure gauge and the second pressure gauge, so that overpressure is prevented.
For example, the water storage tank 5 is further provided with a drain valve, and when the water storage tank 5 needs to be overhauled, the water storage tank 5 is emptied through the drain valve.
Although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (9)
1. The closed high-pressure water electrolysis hydrogen production energy storage system is characterized by comprising a water electrolysis hydrogen production system (1), a hydrogen storage tank (2), an oxygen storage tank (3) and a fuel cell (4);
the hydrogen storage tank (2) is communicated with a hydrogen outlet of the electrolyzed water hydrogen production system (1), the oxygen inlet of the oxygen storage tank (3) is communicated with an oxygen outlet of the electrolyzed water hydrogen production system (1), the hydrogen outlet of the hydrogen storage tank (2) is communicated with a hydrogen side of the fuel cell (4), and the oxygen outlet of the oxygen storage tank (3) is communicated with an oxygen side of the fuel cell (4).
2. The closed high-pressure water electrolysis hydrogen production energy storage system according to claim 1 further comprising a water storage tank (5), wherein the water outlet of the fuel cell (4) is communicated with the inlet of the water storage tank (5), and the outlet of the water storage tank (5) is communicated with the water inlet of the water electrolysis hydrogen production system (1).
3. The closed high-pressure water electrolysis hydrogen production energy storage system according to claim 1, wherein the air inlet of the hydrogen storage tank (2) is communicated with the hydrogen outlet of the water electrolysis hydrogen production system (1) through a first pipeline (6).
4. The closed high-pressure water electrolysis hydrogen production energy storage system according to claim 1, wherein the air inlet of the oxygen storage tank (3) is communicated with the oxygen outlet of the water electrolysis hydrogen production system (1) through a second pipeline (7).
5. The closed high-pressure water electrolysis hydrogen production energy storage system according to claim 1, wherein the gas outlet of the hydrogen storage tank (2) is communicated with the hydrogen side of the fuel cell (4) through a third pipeline (8), and a first pressure reducing valve (10) is arranged on the third pipeline (8).
6. The closed high-pressure water electrolysis hydrogen production energy storage system according to claim 1, wherein the air outlet of the oxygen storage tank (3) is communicated with the oxygen side of the fuel cell (4) through a fourth pipeline (9), and a second pressure reducing valve (11) is arranged on the fourth pipeline (9).
7. The closed high-pressure water electrolysis hydrogen production energy storage system according to claim 2, wherein the water outlet of the fuel cell (4) is communicated with the inlet of the water storage tank (5) through a fifth pipeline (12), and a first water pump is arranged on the fifth pipeline (12).
8. The closed high-pressure water electrolysis hydrogen production energy storage system according to claim 2, wherein the outlet of the water storage tank (5) is communicated with the water inlet of the water electrolysis hydrogen production system (1) through a sixth pipeline (13), and a second water pump is arranged on the sixth pipeline (13).
9. The closed high-pressure water electrolysis hydrogen production energy storage system according to any one of claims 1 to 8, wherein the water electrolysis hydrogen production system (1) is a high-pressure water electrolysis hydrogen production system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310505095.1A CN116613358A (en) | 2023-05-08 | 2023-05-08 | Closed high-pressure water electrolysis hydrogen production energy storage system |
Applications Claiming Priority (1)
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