CN216039841U - An electrolytic hydrogen production system with heat storage - Google Patents
An electrolytic hydrogen production system with heat storage Download PDFInfo
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- CN216039841U CN216039841U CN202122087087.9U CN202122087087U CN216039841U CN 216039841 U CN216039841 U CN 216039841U CN 202122087087 U CN202122087087 U CN 202122087087U CN 216039841 U CN216039841 U CN 216039841U
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- hydrogen production
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 92
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 92
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 238000005338 heat storage Methods 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 59
- 239000003792 electrolyte Substances 0.000 claims abstract description 83
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 239000007789 gas Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 33
- 239000001301 oxygen Substances 0.000 claims description 33
- 229910052760 oxygen Inorganic materials 0.000 claims description 33
- 239000000498 cooling water Substances 0.000 claims description 13
- 150000002431 hydrogen Chemical class 0.000 claims description 11
- 238000004321 preservation Methods 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 230000009471 action Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
-
- 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
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model provides an electrolytic hydrogen production system with heat storage, wherein the electrolytic hydrogen production system comprises an electrolytic bath, a gas-liquid separator, a gas cooler, an electrolyte heat exchanger, a circulating cooling system and a heat storage system. In the rated load operation stage, the heat generated in the electrolysis process is stored in the heat storage system, and after the hydrogen production system stops being started again for a long time, the heat storage system releases the heat to the electrolyte, so that the temperature rise of the electrolyte is accelerated, and the hydrogen production system is quickly recovered to the rated working state. The system design fully recycles the heat in the hydrogen production process by electrolysis and improves the energy conversion efficiency.
Description
Technical Field
The utility model relates to the technical field of electrolytic hydrogen production, in particular to an electrolytic hydrogen production system with heat storage.
Background
The hydrogen energy is a green and efficient secondary energy and has wide application space in the fields of traffic, electric power, chemical industry and the like. The hydrogen production by electrolyzing water by renewable energy provides a green and low-carbon production mode for hydrogen energy, and is the most potential hydrogen production mode under the scenes of carbon peak reaching and carbon neutralization. However, compared with the traditional hydrogen production by using fossil raw materials, the existing water electrolysis hydrogen production technology has the disadvantages of large power consumption and insufficient flexibility in the hydrogen production process. The main body is as follows: (1) in the process of hydrogen production by water electrolysis, except for generating hydrogen and oxygen, the temperature of the electrolyte is gradually increased due to the heat effect of current, and the electrolyte is generally required to be circularly cooled in order to control the electrolysis temperature within a certain range, so that part of heat energy loss can be caused, and the overall conversion efficiency of electric energy is reduced. (2) Under the application scene of accessing renewable energy, the hydrogen production by water electrolysis faces dynamic adjustment and frequent start and stop, and the temperature of the electrolyte can be gradually reduced under the condition that the hydrogen production system stops for a long time. Therefore, the recycling of the heat of the electrolytic hydrogen production system has important significance for improving the efficiency of the electrolytic hydrogen production system.
Therefore, how to realize the storage and release of heat in the electrolytic hydrogen production system to improve the energy utilization efficiency and achieve the purpose of improving the starting speed is a technical problem which needs to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve at least one of the technical problems in the related technology to a certain extent, and provides an electrolytic hydrogen production system with heat storage.
In view of the above, according to a first object of the present invention, an electrolytic hydrogen production system with heat storage is provided, which includes an electrolytic cell, a gas-liquid separator, a gas cooler, an electrolyte heat exchanger, a circulating cooling system and a heat storage system, wherein the electrolytic cell is respectively connected to the electrolyte heat exchanger and the gas-liquid separator; wherein, the downstream of the gas-liquid separator is respectively provided with a gas cooler and a heat storage system; an electrolyte heat exchanger is arranged at the downstream of the heat storage system; and the circulating cooling system respectively exchanges heat with the electrolyte heat exchanger and the gas cooler.
In the electrolysis hydrogen production system with heat storage, the electrolysis bath is an alkaline electrolysis bath, and the anode chamber and the cathode chamber are alternately arranged in the electrolysis bath; the anode chamber and the cathode chamber are both connected with a gas-liquid separator through pipelines.
In the electrolysis hydrogen production system with heat storage, the gas-liquid separator comprises a hydrogen separator and an oxygen separator; the anode chamber is connected with an oxygen separator through a pipeline; the cathode chamber is connected with a hydrogen separator through a pipeline.
In the electrolysis hydrogen production system with heat storage, the heat preservation device is arranged outside the gas-liquid separator.
In the utility model, the heat preservation device is arranged outside the gas-liquid separator, and the heat preservation device is preferably a heat preservation shell, and can also be arranged with other heat preservation performance.
In the electrolytic hydrogen production system with heat storage, the gas cooler comprises a hydrogen cooler and an oxygen cooler; the hydrogen cooler is connected with the hydrogen separator; the oxygen cooler is connected with the oxygen separator.
In the electrolysis hydrogen production system with the heat storage function, the gas cooler is internally provided with the plurality of heat exchange tubes, the heat exchange tubes are connected with the circulating cooling system, and circulating cooling water in the circulating cooling system exchanges heat in the gas cooler.
In the electrolysis hydrogen production system with heat storage, the electrolyte heat exchanger is a dividing wall type heat exchanger, and the electrolyte and the circulating cooling water in the circulating cooling system exchange heat in the electrolyte heat exchanger.
In the electrolysis hydrogen production system with heat storage, the circulating cooling water in the circulating cooling system sequentially passes through the gas cooler and the electrolyte heat exchanger.
A method of operating an electrolytic hydrogen production system with thermal storage comprising the steps of:
(1) operating the electrolytic cell to respectively generate hydrogen and oxygen, wherein the electrolyte circularly flows, and the temperature is gradually increased to 80-90 ℃;
(2) the gas-liquid separator is used for separating hydrogen and oxygen in the electrolyte and then conveying the separated hydrogen and oxygen to a gas cooler; then flowing the electrolyte to a heat storage system;
(3) the electrolyte exchanges heat with the heat storage system, and after the heat storage system finishes heat storage, the electrolyte enters the electrolyte heat exchanger; circulating cooling water in the circulating cooling system exchanges heat of hydrogen and oxygen in the gas cooler and electrolyte in the electrolyte heat exchanger in sequence;
(4) the temperature of the electrolyte in the electrolyte heat exchanger is 60-70 ℃, and the electrolyte circularly flows back to the electrolytic bath.
(5) And after the electrolytic bath stops running and is started again, the electrolytic bath is electrified to run, and the electrolyte is pumped circularly and passes through the gas-liquid separator, the heat storage system, the electrolyte heat exchanger and the electrolytic bath in sequence.
Preferably, through the technical scheme, the utility model provides an electrolytic hydrogen production system with heat storage, which has the following technical effects:
1. the utility model adds the heat storage system on the electrolyte circulation loop of the alkaline water electrolysis hydrogen production system, and the heat storage medium absorbs the heat in the electrolyte to store under the condition of rated operation working condition, thereby realizing the heat recovery,
2. the gas-liquid separator provided by the utility model is additionally provided with the heat-insulating shell, so that the dissipation of the heat of the electrolyte in the shutdown stage of the hydrogen production system is reduced, and the restart of the hydrogen production system is facilitated.
3. In the starting stage of the hydrogen production system, the heat storage medium releases heat to the electrolyte, so that the temperature of the electrolyte is increased to the rated working temperature, the electrolytic reaction efficiency is improved, the heat utilization is realized, and the electric energy conversion and utilization efficiency of the whole electrolytic hydrogen production system is improved.
Drawings
The foregoing and/or additional aspects and advantages of the present invention 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 a battery pack locking mechanism provided in the prior art.
The system comprises an electrolytic cell-1, a gas-liquid separator-2, a gas cooler-3, an electrolyte heat exchanger-4, a circulating cooling system-5 and a heat storage system-6.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
As shown in fig. 1, the embodiment provides an electrolytic hydrogen production system with heat storage, which includes an electrolytic cell 1, a gas-liquid separator 2, a gas cooler 3, an electrolyte heat exchanger 4, a circulating cooling system 5 and a heat storage system 6, wherein the electrolytic cell 1 is connected to the electrolyte heat exchanger 4 and the gas-liquid separator 2 respectively; wherein, the downstream of the gas-liquid separator 2 is respectively provided with a gas cooler 3 and a heat storage system 6; an electrolyte heat exchanger 4 is arranged at the downstream of the heat storage system 6; the circulation cooling system 5 performs heat exchange with the electrolyte heat exchanger 4 and the gas cooler 3, respectively.
Preferably, the electrolytic hydrogen production system in this embodiment further includes at least one electrolyte circulation pump to pump the electrolyte.
Preferably, the circulation cooling system 5 includes at least a cooling tower, a sump and a circulation water pump.
In the embodiment, the heat generated in the hydrogen production process by electrolysis is recovered by the heat storage system 6, so that the comprehensive utilization efficiency of electric energy is improved; and in the restarting stage, the heat storage system 6 can provide heat for the rapid temperature rise of the electrolyte, so that the electrolysis efficiency of the hydrogen production system in the starting stage is improved.
In order to further optimize the embodiment, the electrolytic cell 1 is an alkaline electrolytic cell 1, and anode chambers and cathode chambers are alternately arranged in the electrolytic cell 1; the anode chamber and the cathode chamber are both connected with the gas-liquid separator 2 through pipelines.
In order to further optimize the embodiment, the gas-liquid separator 2 comprises a hydrogen separator and an oxygen separator; the anode chamber is connected with an oxygen separator through a pipeline; the cathode chamber is connected with a hydrogen separator through a pipeline.
In order to further optimize the embodiment, a heat preservation device is arranged outside the gas-liquid separator 2.
The heat preservation device in the embodiment is a heat preservation shell, so that the dissipation of electrolyte heat in the shutdown stage of the hydrogen production system is reduced, and the hydrogen production system is favorable for being restarted.
For further optimization of the present embodiment, it is proposed that the gas cooler 3 comprises a hydrogen cooler and an oxygen cooler; the hydrogen cooler is connected with the hydrogen separator; the oxygen cooler is connected with the oxygen separator.
In order to further optimize the embodiment, a plurality of heat exchange tubes are arranged in the gas cooler 3, the heat exchange tubes are connected with a circulating cooling system 5, and circulating cooling water in the circulating cooling system 5 exchanges heat in the gas cooler 3.
In order to further optimize the embodiment, it is proposed that the electrolyte heat exchanger 4 is a dividing wall type heat exchanger, and the electrolyte and the circulating cooling water in the circulating cooling system 5 perform heat exchange in the electrolyte heat exchanger 4.
In order to further optimize the embodiment, it is proposed that the circulating cooling water in the circulating cooling system 5 passes through the gas cooler 3 and the electrolyte heat exchanger 4 in sequence.
In the embodiment, the temperature of the electrolyte and the temperature of the gas (hydrogen and oxygen in a hydrogen cooler and an oxygen cooler) are controlled by a circulating cooling system 5, when the temperature of the electrolyte is higher, circulating cooling water enters the hydrogen cooler, the oxygen cooler and an electrolyte heat exchanger 4 in sequence under the action of a circulating water pump, the temperature of the hydrogen and the oxygen is reduced and then discharged or enters the next link, the temperature of the electrolyte is reduced and then flows back to an electrolytic cell 1 to prepare hydrogen, and the circulating water with the increased temperature is cooled by the circulating cooling system 5 and then is recycled; when the temperature of the electrolyte is low, the flow of the circulating water pump is reduced or the circulating water pump stops working.
A method of operating an electrolytic hydrogen production system with thermal storage comprising the steps of:
when hydrogen production is needed, the electrolytic cell 1 is electrified to operate, hydrogen is generated in the cathode chamber of the electrolytic cell 1, oxygen is generated in the anode chamber of the electrolytic cell 1, and meanwhile, the electrolyte in the electrolytic cell 1 is gradually increased to the working temperature of 80-90 ℃, and the preferable electrolyte is gradually increased to the working temperature of 85 ℃; under the action of the electrolyte circulating pump, the electrolyte in the cathode chamber enters a hydrogen separator in the gas-liquid separator 2, and hydrogen overflows from the electrolyte and enters a hydrogen cooler in the gas cooler 3; the electrolyte in the anode chamber enters an oxygen separator in the gas-liquid separator 2, and oxygen overflows from the electrolyte and enters an oxygen cooler in the gas cooler 3; the hydrogen and the oxygen exchange heat with circulating cooling water in a circulating cooling system 5 in a hydrogen cooler and an oxygen cooler respectively, and the cooled hydrogen and the cooled oxygen are discharged or enter the next link; the electrolyte in the gas-liquid separator 2 enters the heat storage system 6, heat is transferred to the heat storage medium through the electrolyte, the heat storage medium is heated to the working temperature of the electrolyte, and the heat is gradually stored; the electrolyte flows out of the heat storage system 6 and enters the electrolyte heat exchanger 4, the electrolyte exchanges heat with circulating cooling water in the circulating cooling system 5, the temperature of the electrolyte is reduced to 60-70 ℃, preferably 65 ℃, and then the electrolyte enters the electrolytic cell 1 again to participate in electrolytic reaction; the temperature of the electrolyte returning to the electrolytic tank 1 is controlled by a circulating cooling system 5, when the temperature of the electrolyte is higher, a circulating water pump is started, and when the temperature of the electrolyte is lower, the flow of the circulating water pump is reduced or the circulating water pump stops working; when hydrogen production is not needed, the electrolytic cell 1 is powered off, the hydrogen and oxygen production process is stopped, and the temperature of the electrolyte is gradually reduced to room temperature; when the electrolytic cell needs to be started again, the electrolytic cell 1 is electrified to operate, the hydrogen and oxygen production process through electrolysis starts, the electrolytic cell sequentially passes through the gas-liquid separator 2, the heat storage system 6, the electrolyte heat exchanger 4 and the electrolytic cell 1 under the action of the electrolyte circulating pump, the temperature of the electrolyte at room temperature is rapidly increased through the heat storage system 6, and the heat storage amount of the heat storage system 6 is reduced; along with the hydrogen production process by electrolysis, the electrolyte enters the heat storage system 6, the heat storage quantity is increased by heat exchange, and the temperature of the heat storage medium is increased to 85 ℃ again. In the restarting stage of the electrolytic hydrogen production system with heat storage, the heat storage medium releases heat to the electrolyte, so that the temperature of the electrolyte is increased to the rated working temperature, the electrolytic reaction efficiency is improved, the utilization of heat is realized, and the electric energy conversion and utilization efficiency of the whole electrolytic hydrogen production system is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122087087.9U CN216039841U (en) | 2021-08-31 | 2021-08-31 | An electrolytic hydrogen production system with heat storage |
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| CN202122087087.9U CN216039841U (en) | 2021-08-31 | 2021-08-31 | An electrolytic hydrogen production system with heat storage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699538A (en) * | 2021-08-31 | 2021-11-26 | 中国华能集团清洁能源技术研究院有限公司 | Electrolytic hydrogen production system with heat storage function and operation method thereof |
| WO2024078909A3 (en) * | 2022-10-11 | 2024-06-13 | Siemens Energy Global GmbH & Co. KG | Electrolysis system and use thereof |
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2021
- 2021-08-31 CN CN202122087087.9U patent/CN216039841U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699538A (en) * | 2021-08-31 | 2021-11-26 | 中国华能集团清洁能源技术研究院有限公司 | Electrolytic hydrogen production system with heat storage function and operation method thereof |
| CN113699538B (en) * | 2021-08-31 | 2024-11-15 | 中国华能集团清洁能源技术研究院有限公司 | A hydrogen production system with electrolysis and heat storage and operation method thereof |
| WO2024078909A3 (en) * | 2022-10-11 | 2024-06-13 | Siemens Energy Global GmbH & Co. KG | Electrolysis system and use thereof |
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