CN115772684A - Electrolytic hydrogen production system and electrolytic hydrogen production method - Google Patents
Electrolytic hydrogen production system and electrolytic hydrogen production method Download PDFInfo
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- CN115772684A CN115772684A CN202111045184.XA CN202111045184A CN115772684A CN 115772684 A CN115772684 A CN 115772684A CN 202111045184 A CN202111045184 A CN 202111045184A CN 115772684 A CN115772684 A CN 115772684A
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- electrolyte
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- hydrogen production
- electrolytic cell
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000001257 hydrogen Substances 0.000 title claims abstract description 42
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 239000003792 electrolyte Substances 0.000 claims abstract description 69
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000005868 electrolysis reaction Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- Y02P20/133—Renewable energy sources, e.g. sunlight
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention provides an electrolytic hydrogen production system and an electrolytic hydrogen production method, wherein the electrolytic hydrogen production system utilizes clean energy to carry out electrolytic hydrogen production and comprises an electrolytic tank, a heat exchanger, a gas-liquid separator, a heater, a flow pump and a temperature detection assembly, wherein the electrolytic tank is arranged in an electrolyte circulation loop and is connected with a new energy power supply to carry out electrolytic operation; when the temperature detection assembly judges that the temperature of the electrolyte is not less than the first preset temperature, the heat exchanger is started, the heater is closed, and the electrolytic cell is in a working state; when the temperature detection assembly judges that the temperature of the electrolyte is lower than the first preset temperature, the heat exchanger is closed, the heater is started, the temperature of the electrolyte is kept between the first preset temperature and the second preset temperature, and the electrolytic cell is in a standby state. By adopting the structure, the electrolytic cell can normally electrolyze to produce hydrogen when clean energy is stable, the electrolytic cell is switched to a standby state when the clean energy is unstable, the electrolytic cell can be quickly started when the clean energy is stable again, and the clean energy is efficiently utilized.
Description
Technical Field
The invention relates to the technical field of electrolytic hydrogen production, in particular to an electrolytic hydrogen production system and an electrolytic hydrogen production method.
Background
In order to effectively utilize green clean energy and reduce the waste of non-renewable resources, clean energy such as solar energy, wind energy and the like is generally adopted in the prior art to carry out electrolytic hydrogen production, so that the clean energy is converted into green hydrogen energy.
In the prior art, electrolytic hydrogen production is usually completed through an electrolytic cell, but the electrolytic cell usually needs a long time from starting to normal operation, and because clean energy sources such as solar energy, wind energy and the like are easily influenced by external conditions and have poor stability, the electrolytic cell adopting the clean energy sources such as solar energy, wind energy and the like has low utilization rate of the clean energy sources, and great energy waste is caused; moreover, if the electrolyzer is frequently started or shut down, the alternation between the high working temperature and the ambient temperature will result in the reduction of the service life of the electrolyzer and affect the operation safety of the electrolyzer.
Therefore, how to provide an electrolytic hydrogen production system with high utilization rate of clean energy such as solar energy, wind energy and the like is a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims to provide an electrolytic hydrogen production system with high utilization rate of clean energy such as solar energy, wind energy and the like.
In order to solve the technical problems, the invention provides an electrolytic hydrogen production system which utilizes clean energy to carry out electrolytic hydrogen production and comprises an electrolytic tank, a heat exchanger, a gas-liquid separator, a heater, a flow pump and a temperature detection assembly, wherein the electrolytic tank is arranged in an electrolyte circulation loop and is connected with a new energy power supply to carry out electrolytic operation; when the temperature detection assembly judges that the temperature of the electrolyte is not less than a first preset temperature, the heat exchanger is started, the heater is closed, and the electrolytic cell is in a working state; when the temperature detection assembly judges that the temperature of the electrolyte is less than a first preset temperature, the heat exchanger is closed, the heater is started, the temperature of the electrolyte is kept between the first preset temperature and a second preset temperature, the second preset temperature is less than the first preset temperature, and the electrolytic cell is in a standby state.
By adopting the structure, the electrolytic cell can normally electrolyze to produce hydrogen when clean energy is stable, the electrolytic cell is switched to a standby state when the clean energy is unstable, the electrolytic cell can be quickly started when the clean energy is stable again, and the clean energy is efficiently utilized.
Optionally, the electrolyte pressure detection device further comprises a pressure detection assembly, the pressure detection assembly can detect the pressure of the electrolyte, and if the detected electrolyte pressure is smaller than a preset pressure, the flow pump is controlled to increase the electrolyte pressure until the electrolyte pressure is not smaller than the preset pressure.
Optionally, the flow pump is provided with an electrolyte inlet.
Optionally, the heat exchanger is arranged between the gas-liquid separator and the electrolytic bath and between the gas-liquid separator and the heater.
The invention also provides an electrolytic hydrogen production method based on the electrolytic hydrogen production system, which comprises the following specific steps: the temperature detection assembly detects the temperature of the electrolyte in real time, and when the temperature of the electrolyte is not less than a first preset temperature, the heat exchanger is started, and the heater is closed, so that the electrolytic cell is in a working state; and when the detected temperature of the electrolyte is lower than the first preset temperature, closing the heat exchanger, starting the heater, keeping the temperature of the electrolyte between the first preset temperature and the second preset temperature, and enabling the electrolytic cell to be in a standby state.
Drawings
FIG. 1 is a schematic diagram of an electrolytic hydrogen production system provided by an embodiment of the invention.
The reference numerals in fig. 1 are explained as follows:
1 electrolytic cell, 2 new energy power supply, 3 heat exchanger, 4 gas-liquid separator, 41 gas outlet,
5 heater, 6 flow pump, 61 electrolyte input port, 7 temperature detecting component.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic diagram of an electrolytic hydrogen production system according to an embodiment of the present invention.
The invention provides an electrolytic hydrogen production system, which utilizes clean energy to carry out electrolytic hydrogen production and comprises an electrolytic tank 1, a heat exchanger 3, a gas-liquid separator 4, a heater 5, a flow pump 6 and a temperature detection assembly 7, wherein the electrolytic tank 1 is arranged on an electrolyte circulation loop, the electrolytic tank 1 is connected with a new energy power supply 2 to carry out electrolytic operation, the heat exchanger 3 can dissipate heat of electrolyte, the heater 5 can heat the electrolyte, the flow pump 6 can pump the electrolyte, and the temperature detection assembly 7 can detect the temperature of the electrolyte;
when the temperature detection assembly 7 judges that the temperature of the electrolyte is not less than the first preset temperature, the heat exchanger 3 is opened, the heater 5 is closed, and the electrolytic cell 1 is in a working state;
when the temperature detection assembly 7 judges that the temperature of the electrolyte is lower than the first preset temperature, the heat exchanger 3 is closed, the heater 5 is started, the temperature of the electrolyte is kept between the first preset temperature and a second preset temperature, the second preset temperature is lower than the first preset temperature, and the electrolytic cell 1 is in a standby state.
By adopting the structure, the electrolytic cell 1 can normally electrolyze to produce hydrogen when clean energy is stable, the electrolytic cell is switched to a standby state when the clean energy is unstable, the electrolytic cell can be quickly started when the clean energy is stable again, and the clean energy is efficiently utilized.
The clean energy refers to renewable energy such as solar energy, wind energy and the like, and correspondingly, the new energy power supply 2 may be photovoltaic power generation, wind power generation and the like, and the specific structure of the new energy power supply 2 and what clean energy to utilize are not limited in the invention.
When the new energy power supply 2 for generating electricity by utilizing clean energy can normally support the electrolytic cell 1 to carry out electrolytic hydrogen production operation, the heat exchanger 3, the gas-liquid separator 4, the flow pump 6 and the temperature detection assembly 7 all work normally, the heater 5 is closed, the generated hydrogen and oxygen are continuously output from the gas output port 41 of the gas-liquid separator 4 for circulation, and new electrolyte continuously enters into the circulation through the electrolyte input port 61 of the flow pump 6.
Because of the instability of clean energy, the new energy power supply 2 which utilizes the clean energy to generate electricity often cannot normally support the electrolytic cell 1 to perform the hydrogen production operation by electrolysis, after the electrolytic cell 1 stops hydrogen production by electrolysis, the temperature of the electrolyte is gradually reduced, when the temperature is reduced to be below a first preset temperature, the temperature detection assembly 7 can detect the temperature condition and send out a low-temperature signal to close the heat exchanger 3, open the heater 5 to heat the electrolyte, keep the temperature of the electrolyte to be above a second preset temperature and below the first preset temperature, and the electrolytic cell 1 can keep a standby state and can be quickly started at full power at any time.
Wherein, the first preset temperature is the lowest temperature in the normal working temperature range of the electrolytic cell 1, namely when the temperature of the electrolyte is lower than the temperature, the first preset temperature represents that the electrolytic cell 1 stops normal operation; the second preset temperature is the lowest temperature at which the electrolytic cell 1 can be started, i.e. when the temperature of the electrolyte is higher than the temperature, the electrolytic cell 1 can be started at full power at any time. For example, the normal operating temperature of the electrolytic cell 1 is 80 ℃ to 90 ℃, the minimum start-up temperature is 60 ℃, the first preset temperature is 80 ℃, and the second preset temperature is 60 ℃.
It is understood that the first preset temperature and the second preset temperature are changed according to factors such as the performance of the electrolytic cell 1 and the size of the electrolyte circulation loop, and the present invention is not limited thereto, and can be freely changed according to the situation in practical application.
The heater 5 in this embodiment is powered by an independent power supply to meet the heating requirements of the electrolyte. According to the measurement and calculation, an alkaline water electrolytic cell of 1500 cubic meters per hour is taken as a standard, the power consumption of the electrolytic cell 1 during normal work is 6300 kilowatt hours, and the power consumption of the electrolytic cell 1 during standby is 20 kilowatt hours, so that the method can obviously save energy sources, greatly improve the utilization rate of clean energy sources, and meanwhile, the electrolytic cell 1 does not need to be frequently changed alternately between high temperature and normal temperature, so that the service life of the electrolytic cell 1 is greatly prolonged.
Still include the pressure measurement subassembly in this embodiment, the pressure measurement subassembly can detect the pressure of electrolyte, if the pressure that detects electrolyte is less than preset pressure, then control flow pump 6 increases the pressure of electrolyte, and the pressure until electrolyte is not less than preset pressure.
The preset pressure is the lowest pressure required by the starting of the electrolytic cell 1, and the arrangement is to prevent the pressure of the electrolyte from being too low in the standby process of the electrolytic cell 1, so that the electrolytic cell 1 cannot be started quickly.
In the embodiment, the heat exchangers 3 are arranged between the gas-liquid separator 4 and the electrolytic bath 1 and between the gas-liquid separator 4 and the heater 5 so as to fully dissipate heat of the electrolyte.
The invention also provides an electrolytic hydrogen production method based on the electrolytic hydrogen production system, which comprises the following specific steps:
when the new energy power supply 2 can stably supply power to the electrolytic cell 1, the electrolyte is pumped into the electrolyte circulation loop through the flow pump 6, hydrogen and oxygen are generated through electrolysis of the electrolytic cell 1, the gas is separated out of the electrolyte circulation loop through the gas-liquid separator 4, the heat exchanger 3 is in an open state, the electrolyte dissipates heat through the heat exchanger 3 and is kept at a working temperature, and the electrolytic cell 1 is in a working state;
when the new energy power supply 2 cannot stably supply power to the electrolytic cell 1, the electrolytic cell 1 cannot carry out electrolysis, so that the temperature of the electrolyte is reduced, after the temperature detection assembly 7 detects that the temperature of the electrolyte is lower than a first preset temperature, the heat exchanger 3 is closed, the heater 5 is turned on, the electrolyte is heated, the temperature of the electrolyte is kept between the first preset temperature and a second preset temperature, and the electrolytic cell 1 is in a standby state;
when the temperature detecting component 7 detects that the temperature of the electrolyte rises back to be higher than the first preset temperature, the heater 5 is turned off, the heat exchanger 3 is turned on, and the electrolytic cell 1 works normally to electrolyze hydrogen.
By adopting the method, the utilization rate of clean energy can be improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (5)
1. An electrolytic hydrogen production system utilizes clean energy to carry out electrolytic hydrogen production, and is characterized in that: the electrolytic cell comprises an electrolytic cell (1) arranged on an electrolyte circulation loop, a heat exchanger (3), a gas-liquid separator (4), a heater (5), a flow pump (6) and a temperature detection assembly (7), wherein the electrolytic cell (1) is connected with a new energy power supply (2) to perform electrolysis operation, the heat exchanger (3) can dissipate heat of electrolyte, the heater (5) can heat the electrolyte, the flow pump (6) can pump the electrolyte, and the temperature detection assembly (7) can detect the temperature of the electrolyte;
when the temperature detection assembly (7) judges that the temperature of the electrolyte is not less than a first preset temperature, the heat exchanger (3) is started, the heater (5) is closed, and the electrolytic cell (1) is in a working state;
when the temperature detection assembly (7) judges that the temperature of the electrolyte is less than a first preset temperature, the heat exchanger (3) is closed, the heater (5) is started, the temperature of the electrolyte is kept between the first preset temperature and a second preset temperature, the second preset temperature is less than the first preset temperature, and the electrolytic cell (1) is in a standby state.
2. The electrolytic hydrogen production system according to claim 1, characterized in that: the electrolyte pressure detection device is characterized by further comprising a pressure detection assembly, wherein the pressure detection assembly can detect the pressure of electrolyte, and if the pressure of the detected electrolyte is smaller than the preset pressure, the flow pump (6) is controlled to increase the pressure of the electrolyte until the pressure of the electrolyte is not smaller than the preset pressure.
3. The electrolytic hydrogen production system according to claim 1, characterized in that: the flow pump (6) is provided with an electrolyte inlet (61).
4. The electrolytic hydrogen production system according to claim 1, characterized in that: the heat exchangers (3) are arranged between the gas-liquid separator (4) and the electrolytic tank (1) and between the gas-liquid separator (4) and the heater (5).
5. An electrolytic hydrogen production method based on the electrolytic hydrogen production system described in claims 1 to 4, characterized in that: the method comprises the following specific steps:
the temperature detection component (7) detects the temperature of the electrolyte in real time, and when the temperature of the electrolyte is not less than a first preset temperature, the heat exchanger (3) is started, and the heater (5) is closed, so that the electrolytic cell (1) is in a working state;
and when the detected temperature of the electrolyte is lower than the first preset temperature, the heat exchanger (3) is closed, the heater (5) is started, the temperature of the electrolyte is kept between the first preset temperature and the second preset temperature, and the electrolytic cell (1) is in a standby state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111045184.XA CN115772684A (en) | 2021-09-07 | 2021-09-07 | Electrolytic hydrogen production system and electrolytic hydrogen production method |
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| CN202111045184.XA CN115772684A (en) | 2021-09-07 | 2021-09-07 | Electrolytic hydrogen production system and electrolytic hydrogen production method |
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| CN115772684A true CN115772684A (en) | 2023-03-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116497378A (en) * | 2023-06-30 | 2023-07-28 | 中石油深圳新能源研究院有限公司 | Alkaline water hydrogen production system and method for controlling temperature of electrolyte in electrolytic tank |
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- 2021-09-07 CN CN202111045184.XA patent/CN115772684A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116497378A (en) * | 2023-06-30 | 2023-07-28 | 中石油深圳新能源研究院有限公司 | Alkaline water hydrogen production system and method for controlling temperature of electrolyte in electrolytic tank |
| CN116497378B (en) * | 2023-06-30 | 2023-10-27 | 中石油深圳新能源研究院有限公司 | Alkaline water hydrogen production system and method for controlling temperature of electrolyte in electrolytic tank |
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