CN113943941A - Geothermal coupling energy-saving type water electrolysis hydrogen production system - Google Patents
Geothermal coupling energy-saving type water electrolysis hydrogen production system Download PDFInfo
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- CN113943941A CN113943941A CN202111264868.9A CN202111264868A CN113943941A CN 113943941 A CN113943941 A CN 113943941A CN 202111264868 A CN202111264868 A CN 202111264868A CN 113943941 A CN113943941 A CN 113943941A
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- geothermal
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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
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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
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
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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
- 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
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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
- 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
- C25B9/67—Heating or cooling means
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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
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The application provides a geothermal coupling energy-saving type water electrolysis hydrogen production system, which comprises an electrolytic bath, a gas-liquid separation device, a first heat exchanger, a photovoltaic power generation device, an expansion valve, a second heat exchanger and a compressor, wherein the electrolytic bath, the gas-liquid separation device and the first heat exchanger are sequentially connected end to end through pipelines; a comprehensive energy system is created, and the utilization rate of low-quality geothermal energy is improved; the use of circulating cooling water is reduced by adopting geothermal energy, and the method has obvious environmental protection benefit.
Description
Technical Field
The application relates to the technical field of electrolytic hydrogen production, in particular to an energy-saving type water electrolysis hydrogen production system coupled with geothermal energy.
Background
In recent years, the new energy power generation industry represented by photovoltaic has been rapidly developed, the installed amount and the generated amount of photovoltaic power generation are remarkably increased, and the power generation cost is also frequently innovative. Therefore, photovoltaic hydrogen production is regarded as a key link for constructing a novel energy system. However, photovoltaic power generation has day and night intermittence which is difficult to avoid, power generation and hydrogen production can be realized only when illumination is sufficient in the day, and power generation and hydrogen production cannot be realized when illumination is absent at night. The hydrogen production by water electrolysis is a heat release process, and redundant heat needs to be continuously removed by an electrolyte cooling device during the daytime power generation and hydrogen production; if the temperature of the electrolyte is too high, the service life of the electrolytic cell can be seriously influenced, and even a safety risk is caused. When hydrogen production is stopped at night, no heat is generated in the system, and the temperature of the electrolyte is naturally cooled; the conductivity of the electrolyte is reduced after the temperature of the electrolyte is reduced, so that the temperature of the electrolytic cell is required to be raised to the rated operation temperature for a long time when the electrolytic cell is restarted.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the purpose of the application is to provide a geothermal-coupled photovoltaic hydrogen production system, a second heat exchanger is arranged in the hydrogen production system in a coupling connection mode through a first heat exchanger, the second heat exchanger is externally connected with a geothermal heat source, the geothermal heat source is used for cooling the hydrogen production system in the daytime and preserving heat of the hydrogen production system at night, the continuity of the photovoltaic hydrogen production process is kept, and the comprehensive energy consumption of the hydrogen production process is reduced; a comprehensive energy system is created, and the utilization rate of low-quality geothermal energy is improved; the use of circulating cooling water is reduced by adopting geothermal energy, and the method has obvious environmental protection benefit.
In order to achieve the purpose, the application provides an energy-saving type water electrolysis hydrogen production system of coupling geothermal energy, including electrolysis trough, gas-liquid separation device and the first heat exchanger through pipeline end to end connection in proper order, still include photovoltaic power generation device, photovoltaic power generation device with the electrolysis trough electricity is connected, still include with first heat exchanger passes through pipeline end to end connection's expansion valve, second heat exchanger and compressor in proper order, wherein, the second heat exchanger is outer to be connected geothermal heat source.
Further, the heat tracing pipeline is arranged between the first heat exchanger and the electrolytic bath.
Further, the heat tracing pipeline is an electric heating pipe or a heat coil pipe heated by a heat conducting medium.
Further, the heat-conducting medium is at least one of steam, flue gas or lava.
Further, the geothermal heat source comprises at least one of soil, earth formations, rock and earth mass, or ground water.
Further, the electrolytic bath device also comprises a circulating pump arranged between the heat tracing pipeline and the electrolytic bath.
Further, the electrolytic bath device also comprises an electrolyte cooling device, wherein the electrolyte cooling device is arranged on a pipeline between the circulating pump and the electrolytic bath in parallel through a branch pipeline.
Further, still include first valve, first valve set up in the circulating pump with on the pipeline between the electrolysis trough, first valve with electrolyte cooling device sets up in parallel.
Further, the electrolytic cell also comprises a second valve and a third valve, wherein the second valve is arranged on a branch pipeline between the electrolyte cooling device and the electrolytic cell, and the third valve is arranged on a branch pipeline between the electrolyte cooling device and the circulating pump.
Further, the electrolytic cell is an alkaline electrolytic cell or a solid polymer electrolytic cell.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an energy-saving water electrolysis hydrogen production system coupled with geothermal energy according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the application include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Fig. 1 is a schematic structural diagram of an energy-saving water electrolysis hydrogen production system coupled with geothermal energy according to an embodiment of the present application.
Referring to fig. 1, the energy-saving type water electrolysis hydrogen production system coupled with geothermal energy comprises an electrolytic cell 2, a gas-liquid separation device 3, a first heat exchanger 4 and a photovoltaic power generation device 1, wherein the electrolytic cell 2, the gas-liquid separation device 3 and the first heat exchanger 4 are sequentially connected end to end through pipelines, the photovoltaic power generation device 1 is electrically connected with the electrolytic cell 2, the photovoltaic power generation device further comprises an expansion valve 10, a second heat exchanger 9 and a compressor 8, the first heat exchanger 4 and the second heat exchanger are sequentially connected end to end through pipelines, and the second heat exchanger 9 is externally connected with a geothermal energy source.
In the embodiment, a photovoltaic power generation device 1, an electrolytic bath 2, a gas-liquid separation device 3, a heat tracing pipeline 5, a circulating pump 6 and an electrolyte cooling device 7 form an electrolytic hydrogen production system; the first heat exchanger 4, the compressor 8, the second heat exchanger 9 and the expansion valve 10 form a ground source heat pump system, and the ground source heat pump system and the electrolytic hydrogen production system are coupled with each other so as to fully utilize the heat of the electrolytic hydrogen production system, maintain the continuity of the photovoltaic hydrogen production process and reduce the comprehensive energy consumption of the hydrogen production process. An electrolyte is injected into the electrolytic cell, and optionally, the electrolyte is KOH alkaline solution or pure water. The second heat exchanger is externally connected with a geothermal heat source so as to realize heat conduction of the second heat exchanger and the geothermal heat source, a specific heat conduction mode can be realized by arranging a metal heat conduction pipe for heat conduction, and a heat conduction medium for heat conduction can also be arranged for heat conduction, such as water and the like, and the heat conduction of the second heat exchanger and the geothermal heat source can be realized, so that the application is not limited.
An energy-saving water electrolysis hydrogen production system coupled with geothermal energy further comprises a heat tracing pipeline 5 arranged between the first heat exchanger 4 and the electrolytic bath 2. In this embodiment, the heat tracing pipeline 5 is a heating pipeline, and can be disposed between the pipelines as an independent pipeline structure, for example, it can be a heat coil, and the pipeline can also be modified to meet the characteristic of heating, for example, a heating cable, an electric heating tape or an electric heating wire is wound on the pipeline. When electrolyte in the pipeline needs to be heated, auxiliary heating of the electrolyte is achieved, and heating efficiency is improved.
The heat tracing pipeline 5 is an electric heating pipe or a heat coil pipe heated by a heat conducting medium. In this embodiment, when the heat tracing pipeline is an electric heating pipe, circuit control is conveniently realized, remote control is convenient, and when the heat tracing pipeline is a heat coil pipe heated by a heat conducting medium, a geothermal heat source is conveniently utilized, which is beneficial to improving energy utilization efficiency.
The heat-conducting medium is at least one of steam, flue gas or lava. The form of the heat-conducting medium may be selected according to a specific application scenario, which is not limited in this application.
The geothermal heat source comprises at least one of soil, earth formations, rock and earth mass, or groundwater. The geothermal heat source has larger specific heat capacity and stronger heat preservation capability, and avoids heat loss.
An energy-saving water electrolysis hydrogen production system coupled with geothermal energy further comprises a circulating pump 6 arranged between the heat tracing pipeline 5 and the electrolytic bath 2. The circulating pump 6 is arranged, so that the circulating efficiency of the electrolyte in the electrolytic hydrogen production system can be improved, and the hydrogen production capacity is further improved.
The energy-saving type water electrolysis hydrogen production system coupled with the geothermal energy further comprises an electrolyte cooling device 7, wherein the electrolyte cooling device 7 is arranged on a pipeline between the circulating pump 6 and the electrolytic cell 2 in parallel through a branch pipeline. Electrolyte cooling device 7 is used for cooling off electrolyte to the temperature that can not arouse the electrolysis trough in the electrolyte circulation gets into the electrolysis trough risees, and electrolyte cooling device 7 parallelly connected sets up on the pipeline between circulating pump 6 and the electrolysis trough 2, can the selectivity make the electrolyte in the pipeline whether pass through electrolyte cooling device, and the flexibility is high, and when need not cooling off electrolyte, electrolyte cooling device closes, is favorable to improving electrolyte cooling device's life, electrolyte cooling device regards as the cold source with open or closed circulative cooling water system.
The energy-saving type water electrolysis hydrogen production system coupled with the geothermal energy further comprises a first valve 11, wherein the first valve 11 is arranged on a pipeline between the circulating pump 6 and the electrolytic cell 2, and the first valve 11 and the electrolyte cooling device 7 are arranged in parallel. The arrangement of the first valve 11 mainly controls the opening and closing of a pipeline between the electrolytic tank and the circulating pump, so that whether the electrolyte flows through the electrolyte cooling device or not is controlled.
The energy-saving type water electrolysis hydrogen production system coupled with the geothermal energy further comprises a second valve 12 and a third valve 13, wherein the second valve 12 is arranged on a branch pipeline between the electrolyte cooling device 7 and the electrolytic cell 2, and the third valve 13 is arranged on a branch pipeline between the electrolyte cooling device 7 and the circulating pump 6. The second valve 12 and the third valve 13 mainly control the opening and closing of the branch pipeline where the electrolyte cooling device 7 is located, so that when the electrolyte cooling device does not work, the electrolyte is prevented from flowing through the branch pipeline, and the circulation efficiency of the electrolyte is improved.
The electrolytic bath is an alkaline electrolytic bath or a solid polymer electrolytic bath. The specific form of the electrolytic cell can be set according to the actual application scene, and the application is not limited.
Specifically, the geothermal-coupled energy-saving water electrolysis hydrogen production system works as follows, and in daytime, the photovoltaic power generation device 1 generates power to supply power to the electrolytic cell 2 to produce hydrogen; the first heat exchanger 4 is an evaporator, the second heat exchanger 9 is a condenser, the evaporator absorbs heat of the electrolyte to pre-cool the electrolyte, and the condenser releases heat into a ground source through a pipeline; the first valve 11 is closed, the second valve 12 and the third valve 13 are opened, and the electrolyte is further cooled in the electrolyte cooling device 7; the heat tracing conduit 5 is closed. At night, the photovoltaic power generation device 1 does not generate power, and the electrolytic cell 2 is stopped; the first heat exchanger 4 is a condenser, the second heat exchanger 9 is an evaporator, the condenser heats the electrolyte to preheat the electrolyte, and the evaporator absorbs heat from the ground source through a pipeline; the first valve 11 is opened, and the second valve 12 and the third valve 13 are closed; the electrolyte cooling device 7 is turned off; the heat tracing pipeline 5 is opened to further heat the electrolyte.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. The energy-saving type water electrolysis hydrogen production system is characterized by comprising an electrolytic cell, a gas-liquid separation device, a first heat exchanger, a photovoltaic power generation device, an expansion valve, a second heat exchanger and a compressor, wherein the electrolytic cell, the gas-liquid separation device and the first heat exchanger are sequentially connected end to end through pipelines, the photovoltaic power generation device is electrically connected with the electrolytic cell, the expansion valve, the second heat exchanger and the compressor are sequentially connected end to end through pipelines, and the second heat exchanger is externally connected with a geothermal heat source.
2. The geothermal energy-saving water electrolysis hydrogen production system according to claim 1, further comprising a heat tracing pipeline arranged between the first heat exchanger and the electrolytic bath.
3. The geothermal energy-saving water electrolysis hydrogen production system according to claim 2, wherein the heat tracing pipeline is an electric heating pipe or a heat coil heated by a heat conducting medium.
4. The geothermal-coupled energy-saving water electrolysis hydrogen production system according to claim 3, wherein the heat transfer medium is at least one of steam, flue gas or lava.
5. The geothermal energy-saving hydrogen production system by electrolysis of water according to claim 1, wherein the geothermal heat source comprises at least one of soil, ground, rock-soil mass or ground water.
6. The geothermal energy-saving system for electrolyzing water to produce hydrogen of claim 2, further comprising a circulation pump disposed between the heat-tracing conduit and the electrolyzer.
7. The geothermal energy-saving hydrogen production system by electrolyzing water as described in claim 6, further comprising an electrolyte cooling device, said electrolyte cooling device is disposed in parallel on the pipeline between said circulating pump and the electrolytic cell by branch pipeline.
8. The geothermal-coupled energy-saving water electrolysis hydrogen production system according to claim 7, further comprising a first valve, wherein the first valve is arranged on a pipeline between the circulating pump and the electrolytic cell, and the first valve and the electrolyte cooling device are arranged in parallel.
9. The geothermal-coupled energy-saving water electrolysis hydrogen production system according to claim 7, further comprising a second valve and a third valve, wherein the second valve is disposed on the branch line between the electrolyte cooling device and the electrolytic bath, and the third valve is disposed on the branch line between the electrolyte cooling device and the circulation pump.
10. The geothermal-coupled energy-saving water electrolysis hydrogen production system according to claim 1, wherein the electrolysis bath is an alkaline electrolysis bath or a solid polymer electrolysis bath.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111264868.9A CN113943941A (en) | 2021-10-28 | 2021-10-28 | Geothermal coupling energy-saving type water electrolysis hydrogen production system |
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| CN202111264868.9A CN113943941A (en) | 2021-10-28 | 2021-10-28 | Geothermal coupling energy-saving type water electrolysis hydrogen production system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029718A (en) * | 2022-06-15 | 2022-09-09 | 阳光氢能科技有限公司 | Hydrogen production system and control method thereof |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029718A (en) * | 2022-06-15 | 2022-09-09 | 阳光氢能科技有限公司 | Hydrogen production system and control method thereof |
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