CN113430570A - Hydrogen production electrolyte temperature control method and hydrogen production system - Google Patents
Hydrogen production electrolyte temperature control method and hydrogen production system Download PDFInfo
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- CN113430570A CN113430570A CN202110806849.8A CN202110806849A CN113430570A CN 113430570 A CN113430570 A CN 113430570A CN 202110806849 A CN202110806849 A CN 202110806849A CN 113430570 A CN113430570 A CN 113430570A
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 210
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 239000001257 hydrogen Substances 0.000 title claims abstract description 160
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 160
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 75
- 238000004321 preservation Methods 0.000 claims abstract description 48
- 230000001502 supplementing effect Effects 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 238000003860 storage Methods 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000005868 electrolysis reaction Methods 0.000 description 14
- 238000009413 insulation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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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
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
- C25B15/023—Measuring, analysing or testing during electrolytic production
- C25B15/025—Measuring, analysing or testing during electrolytic production of electrolyte parameters
- C25B15/027—Temperature
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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
- 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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- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
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- Analytical Chemistry (AREA)
- Automation & Control Theory (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The method comprises the steps of obtaining the current temperature of electrolyte in an electrolytic cell, controlling a heat preservation tank and a liquid supplementing device to adjust the electrolyte in the electrolytic cell if the current temperature of the electrolyte is not within a preset temperature range, and improving the average temperature of the electrolyte in the electrolytic cell by matching the temperature of the electrolyte in the heat preservation tank with the temperature of the electrolyte in the liquid supplementing device, so that the electric energy required for heating the electrolyte to the preset temperature range is reduced, the heating time is shortened, and the hydrogen production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of hydrogen preparation, in particular to a hydrogen production electrolyte temperature control method and a hydrogen production system.
Background
The hydrogen production system by water electrolysis is the most common hydrogen production mode at present, and the hydrogen production system by water electrolysis in the prior art basically comprises a hydrogen production power supply, an electrolytic cell, a hydrogen storage tank, a liquid supplementing device and the like, wherein the hydrogen production power supply is connected with the electrolytic cell, the electrolytic cell provides electric energy required by water electrolysis, the electrolytic cell is respectively connected with the hydrogen storage tank and the liquid supplementing device, the liquid supplementing device is used for storing and providing electrolyte required by the electrolysis process, and the hydrogen storage tank stores hydrogen obtained by electrolysis.
In practical use, the electrolyte in the electrolytic cell needs to be preheated before hydrogen production by electrolysis, hydrogen production by electrolysis can be started after the temperature of the electrolyte reaches 60-100 ℃, and certainly, the temperature of the electrolyte still needs to be kept between 60-100 ℃ in the hydrogen production process.
However, after one hydrogen production cycle is finished, the electrolyte is gradually cooled along with the extension of the downtime, and when the second hydrogen production cycle is started, the electrolyte is often required to be preheated again, so that a large amount of electric energy is wasted, the time consumption of the electrolyte heating process is long, and the hydrogen production efficiency is influenced.
Disclosure of Invention
The invention provides a hydrogen production electrolyte temperature control method and a hydrogen production system.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
in a first aspect, the invention provides a temperature control method for hydrogen production electrolyte, which is applied to a hydrogen production system, wherein the hydrogen production system comprises a heat preservation tank and a liquid supplementing device which are respectively connected with an electrolytic cell, and the method comprises the following steps:
obtaining the current temperature of the electrolyte in the electrolytic cell;
if the current temperature is not within the preset temperature range, controlling the heat-preserving tank and the liquid supplementing device to adjust the electrolyte in the electrolytic cell;
and the temperature of the electrolyte in the heat preservation tank is higher than that of the electrolyte in the liquid supplementing device.
Optionally, if the current temperature is higher than the upper limit value of the preset temperature range, the controlling the heat-preserving tank and the liquid replenishing device to adjust the electrolyte in the electrolytic cell includes:
controlling the heat-preservation tank to store the electrolyte in the electrolytic bath;
and controlling the liquid supplementing device to release the electrolyte into the electrolytic cell.
Optionally, if the current temperature is lower than the lower limit of the preset temperature range, the controlling the insulation tank and the liquid replenishing device to adjust the electrolyte in the electrolytic cell includes:
controlling the heat-preservation tank to release electrolyte into the electrolytic cell;
and maintaining the liquid supplementing device in a closed state.
Optionally, the controlling the heat-preserving tank and the liquid-replenishing device to adjust the electrolyte in the electrolytic cell includes:
monitoring the current capacity of the electrolyte in the electrolytic cell;
and on the premise that the current capacity is within a preset capacity range, controlling the heat-preserving tank and the liquid supplementing device to adjust the electrolyte in the electrolytic cell.
Optionally, the hydrogen production system further comprises a heating device, and the method further comprises:
if the release of the electrolyte stored in the heat-preserving tank is finished or the capacity of the electrolyte in the electrolytic cell reaches a preset capacity threshold value, the temperature of the electrolyte in the electrolytic cell is not in the preset temperature range,
and controlling the heating device to heat the electrolyte in the electrolytic cell until the temperature of the electrolyte in the electrolytic cell is within the preset temperature range.
Optionally, if the heat-preserving tank is full of electrolyte and the electrolyte in the electrolytic cell reaches a preset capacity threshold, the temperature of the electrolyte in the electrolytic cell is not within the preset temperature range, and warning information representing that the temperature of the electrolyte is too high is sent.
Optionally, the controlling the heat-preserving tank to store the electrolyte in the electrolytic cell includes:
controlling a liquid inlet of the heat-preserving tank to be opened, and monitoring the residual capacity of the heat-preserving tank;
and if the residual capacity reaches a preset safety threshold value, controlling a liquid inlet of the heat-preserving tank to be closed.
Optionally, the controlling the heat-preserving tank to store the electrolyte in the electrolytic cell includes:
controlling the opening of a liquid inlet of the heat preservation tank, and monitoring the liquid level of the electrolyte in the heat preservation tank;
and if the liquid level of the electrolyte in the heat-preserving tank reaches a preset liquid level threshold value, controlling the liquid inlet of the heat-preserving tank to be closed.
Optionally, the obtaining the current temperature of the electrolyte in the electrolytic cell includes:
obtaining target operating parameters of the hydrogen production system;
judging whether the target operation parameters meet preset starting conditions or not;
and if the target operation parameter meets a preset starting condition, acquiring the current temperature of the electrolyte in the electrolytic cell.
Optionally, the target operating parameter includes an output power of a hydrogen production power supply in the hydrogen production system;
the judging whether the target operation parameter meets a preset starting condition comprises the following steps:
judging whether the duration of the output power of the hydrogen production power supply which is greater than the preset power threshold is greater than or equal to the preset duration threshold or not;
if the duration is greater than the preset duration threshold, judging that a preset starting condition is met;
and if the output power of the hydrogen production power supply is less than or equal to the preset power threshold, or the duration is less than the preset duration threshold, judging that the preset starting condition is not met.
Optionally, the hydrogen production electrolyte temperature control method provided by any one of the first aspect of the present invention further includes:
obtaining a shutdown instruction;
and responding to the stop instruction, and controlling the heat-preserving tank to store the electrolyte in the electrolytic cell.
In a second aspect, the present invention provides a hydrogen production system comprising: a hydrogen production power supply, an electrolytic bath, a hydrogen storage tank, a liquid supplementing device, a heat preservation tank and a hydrogen production controller,
the hydrogen production power supply is connected with the electrolytic bath;
the electrolytic bath is respectively connected with the hydrogen storage tank, the liquid supplementing device and the heat preservation tank;
the hydrogen production controller is respectively connected with the hydrogen production power supply, the electrolytic bath, the hydrogen storage tank, the liquid supplementing device and the heat preservation tank;
the hydrogen production controller executes the hydrogen production electrolyte temperature control method provided in any one of the first aspect of the invention.
Optionally, the hydrogen production system provided by the second aspect of the present invention further comprises: a first power conversion device and a heating device, wherein,
the input end of the first power conversion device is connected with the hydrogen production power supply;
the output end of the first power conversion device is connected with the heating device;
the hydrogen production controller is respectively connected with the first power conversion device and the heating device;
the heating device is used for heating the electrolyte in the electrolytic cell.
Optionally, the hydrogen production system provided by the second aspect of the present invention further comprises: a second power conversion device, wherein,
the second power conversion device is connected between the hydrogen production power supply and the electrolytic bath.
Optionally, the hydrogen production power supply comprises a photovoltaic module.
The temperature control method of the hydrogen production electrolyte provided by the invention is applied to a hydrogen production system comprising a heat preservation tank and a liquid supplementing device, after the current temperature of the electrolyte in an electrolytic cell is obtained, if the current temperature of the electrolyte is not in a preset temperature range, the heat preservation tank and the liquid supplementing device are controlled to adjust the electrolyte in the electrolytic cell, and because the temperature of the electrolyte in the heat preservation tank is higher than the temperature of the electrolyte in the liquid supplementing device, the average temperature of the electrolyte in the electrolytic cell can be improved through the matching of the two, so that the electric energy required for heating the electrolyte to the preset temperature range is reduced, meanwhile, the heating time is shortened, and the hydrogen production efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram of a hydrogen production system according to an embodiment of the present invention;
FIG. 2 is a block diagram of another hydrogen production system provided by an embodiment of the present invention;
fig. 3 is a flowchart of a hydrogen production electrolyte temperature control method according to an embodiment of the present invention;
FIG. 4 is a flow chart of another hydrogen production electrolyte temperature control method provided by an embodiment of the present invention;
fig. 5 is a flowchart of another method for controlling the temperature of the hydrogen production electrolyte according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a block diagram of a hydrogen production system according to an embodiment of the present invention, where the hydrogen production system includes: a hydrogen production power supply 10, an electrolytic bath 20, a hydrogen storage tank 30, a liquid supplementing device 40, a heat preservation tank 50 and a hydrogen production controller 60, wherein,
the hydrogen production power supply 10 is connected to the electrolytic cell 20, and optionally, in order to control the hydrogen production power of the electrolytic cell 20 more accurately, the hydrogen production system provided in this embodiment further includes a second power conversion device 70, an output end of the hydrogen production power supply 10 is connected to an input end of the second power conversion device 70, an output end of the second power conversion device 70 is connected to an input end of the electrolytic cell 20, and the hydrogen production power supply 10 outputs the electric energy required for hydrogen production to the electrolytic cell 20 through the second power conversion device 70. It is conceivable that the second power conversion device 70 may be implemented by a DC/DC converter in a case where the hydrogen generation power source 10 is a direct current power source such as a photovoltaic module. Accordingly, in the case that the hydrogen-producing power supply 10 is an AC power supply, the second power conversion device 70 needs to be implemented by an AC/DC converter.
The hydrogen storage tank 30 is connected with a hydrogen gas outlet of the electrolytic cell 20 and is used for storing hydrogen gas generated by electrolysis. The liquid replenishing device 40 and the heat-preserving tank 50 are both used for storing electrolyte, and the difference between the two is that the liquid replenishing device 40 is used for storing the electrolyte at normal temperature or unused, and the heat-preserving tank 50 is a newly added component on the basis of the existing hydrogen production system, and is mainly used for storing the electrolyte with higher temperature in the electrolytic cell 20. In addition, in specific structure, the liquid supplementing device 40 is only provided with an electrolyte outlet, namely, the electrolyte can be released into the electrolytic cell 20, the heat preservation tank 50 is provided with a liquid inlet and a liquid outlet, the two interfaces are respectively connected with the electrolytic cell 20, the heat preservation tank 50 can store the high-temperature electrolyte in the electrolytic cell 20 through the liquid inlet, and correspondingly, the high-temperature electrolyte can be released into the electrolytic cell 20 through the liquid outlet.
The hydrogen production controller 60 is respectively connected to the hydrogen production power supply 10, the electrolytic cell 20, the hydrogen storage tank 30, the liquid replenishing device 40, and the heat preservation tank 50, and is configured to execute the hydrogen production electrolyte temperature control method provided in the subsequent embodiment of the present invention, and specific contents of the hydrogen production electrolyte temperature control method will be developed in the subsequent contents, which will not be described in detail herein.
Further, referring to fig. 2, fig. 2 is a block diagram of another hydrogen production system according to an embodiment of the present invention, and based on the embodiment shown in fig. 1, the hydrogen production system according to this embodiment further includes a first power conversion device 80 and a heating device 90, wherein,
in this embodiment, the first power conversion device 80 is mainly used for converting the electric energy output by the hydrogen production power supply 10 into the electric energy usable by the heating device 90, so that the heating device 90 can heat the electrolyte in the electrolytic cell 20. The contact or connection between the heating device 90 and the electrolytic bath 20 can be realized by combining the prior art, but the invention is not limited thereto.
Alternatively, if the hydrogen production power supply 10 outputs direct current, the first power conversion device 80 may be implemented by selecting a DC/DC converter in the case that the heating device 90 also operates with direct current, and correspondingly, the first power conversion device 80 may be implemented by selecting a DC/AC converter in the case that the heating device 90 operates with alternating current. Of course, in practical applications, the adaptive first power conversion device 80 may be selected based on other specific types of the hydrogen-producing power source 10 and the heating device 90, which are not listed here, and the invention is also within the protection scope of the present invention without departing from the scope of the core idea of the present invention.
In summary, the hydrogen production system provided by the embodiment of the invention is provided with the heat preservation tank and the liquid supplementing device, the temperature of the electrolyte in the heat preservation tank is higher than the temperature of the electrolyte output by the liquid supplementing device, and the average temperature of the electrolyte in the electrolytic cell can be increased by adjusting the electrolyte in the electrolytic cell through the cooperation of the heat preservation tank and the liquid supplementing device, so that the electric energy required for heating the electrolyte to the preset temperature range can be reduced, the heating time is shortened, and the hydrogen production efficiency is improved.
Furthermore, if the hydrogen production power supply is realized by a photovoltaic module, the electric energy required by the heating device for heating the electrolyte can be directly provided by the photovoltaic module, and compared with the mode that the heating device directly takes electricity from an alternating current power grid in the prior art, the utilization rate of the electric energy output by the photovoltaic module can be improved, and meanwhile, the consumption of the electric energy of the power grid can be further reduced.
Based on the above, the embodiment of the present invention provides a hydrogen production electrolyte temperature control method, which is applied to the hydrogen production system provided in any of the above embodiments, and is specifically applied to a hydrogen production controller in the hydrogen production system, and of course, in some cases, the method may also be applied to a server on a network side.
Referring to fig. 3, a flow of a hydrogen production electrolyte temperature control method provided by an embodiment of the present invention may include:
s100, obtaining the current temperature of the electrolyte in the electrolytic cell.
As mentioned above, before hydrogen production by electrolysis, the electrolyte in the electrolytic cell needs to be heated to a preset temperature range, in order to obtain the temperature of the electrolyte, a temperature acquisition device, such as a temperature sensor, is disposed in the electrolytic cell, and when the control method provided by this embodiment is applied, the current temperature of the electrolyte can be directly obtained by the temperature acquisition device in the electrolytic cell.
S110, judging whether the current temperature of the electrolyte in the electrolytic cell is not within a preset temperature range, if so, executing S120.
And after the current temperature of the electrolyte in the electrolytic cell is obtained, judging whether the current temperature of the electrolyte is within a preset temperature range. It is conceivable that the preset temperature range mentioned in this embodiment is set based on the basic requirement for the temperature of the electrolyte in the electrolytic hydrogen production process and the operating environment of the hydrogen production system, and the specific value of the preset temperature range is not limited in the present invention.
If the current temperature of the electrolyte is not within the preset temperature range, S120 is executed, and if the current temperature of the electrolyte is within the preset temperature range, it is indicated that the electrolyte meets the hydrogen production requirement, hydrogen production can be immediately started, and the specific hydrogen production control process can be implemented by combining with the prior art, which is not described herein again.
And S120, controlling the heat preservation tank and the liquid supplementing device to adjust the electrolyte in the electrolytic cell.
As mentioned above, the temperature of the electrolyte in the heat-preserving tank in the hydrogen production system is higher than the temperature of the electrolyte in the liquid supplementing device, under the condition that the current temperature of the electrolyte in the electrolytic cell is not within the preset temperature range, the electrolyte with different temperatures can be released into the electrolytic cell through the heat-preserving tank and the liquid supplementing device, the temperature of the electrolyte in the electrolytic cell is adjusted by utilizing the heat exchange among the electrolytes with different temperatures, and the purpose of changing the temperature of the electrolyte in the electrolytic cell is further achieved.
It is conceivable that the current temperature of the electrolyte is not within the preset temperature range, and there are two cases, one of which is that the current temperature is higher than the upper limit value of the preset temperature range, and the other is that the current temperature is lower than the lower limit value of the preset temperature range.
Under the condition that the current temperature of the electrolyte is higher than the upper limit value of the preset temperature range, the insulation tank is controlled to store the electrolyte in the electrolytic cell, namely the electrolyte with higher temperature is stored in the insulation tank. The concrete realization that can include, for example, the holding tank is provided with inlet and liquid outlet, and the inlet that here needs control holding tank is opened, monitors the residual capacity of holding tank simultaneously to under the residual capacity of holding tank reached the condition of predetermineeing safe threshold value, the inlet of control holding tank is closed, prevents to press too high in the holding tank, influences the operation security. Wherein, for the setting of presetting safe threshold, can combine the concrete parameter and the actual conditions of holding tank to confirm.
Furthermore, the liquid inlet of the control heat-preserving tank can be opened, the liquid level of the electrolyte in the heat-preserving tank is monitored while the high-temperature electrolyte in the electrolytic cell is stored, and when the liquid level of the electrolyte in the heat-preserving tank reaches a preset liquid level threshold value, the liquid inlet of the control heat-preserving tank is closed.
Furthermore, after the heat preservation tank is controlled to store the electrolyte in the electrolytic cell, the electrolyte supplementing device is controlled to release the electrolyte into the electrolytic cell, and the temperature of the electrolyte provided by the electrolyte supplementing device is lower than the temperature of the electrolyte in the electrolytic cell and the heat preservation tank, so that the purpose of reducing the overall temperature of the electrolyte in the electrolytic cell can be achieved.
It should be noted that, as for the opening sequence of the liquid inlet of the heat preservation tank and the liquid supplementing device, other options are available, for example, the two are started simultaneously, or the liquid supplementing device is firstly opened to cool the electrolyte in the electrolytic cell, and then the liquid storage tank is opened to store the electrolyte with a temperature not particularly high, which is also feasible. In specific application, the actual temperature and the actual capacity of the electrolyte in the heat-preservation tank, the liquid supplementing device and the electrolytic cell need to be combined for determination, and the temperature and the capacity of the electrolyte in the electrolytic cell are also within the protection scope of the invention on the premise of not exceeding the core thought scope of the invention.
Optionally, high temperature electrolyte in the electrolysis trough is stored through the heat preservation jar, the fluid infusion device releases low temperature electrolyte to the electrolysis trough in, can reduce the average temperature of electrolyte in the electrolysis trough to a certain extent, however, if store up at the heat preservation jar full and the electrolyte in the electrolysis trough reaches under the condition of predetermineeing the capacity threshold value, the temperature of electrolyte in the electrolysis trough still is not in predetermineeing the temperature range, it has been difficult to adjust the electrolyte temperature to explain the cooperation through heat preservation jar and fluid infusion device, under this kind of condition, can send the too high warning information of sign electrolyte temperature, in order to remind fortune dimension personnel to participate in the control.
Correspondingly, under the condition that the current temperature of the electrolyte is lower than the lower limit value of the preset temperature range, the heat-preservation tank needs to be controlled to release the high-temperature electrolyte into the electrolytic cell, and meanwhile, the liquid supplementing device is maintained in a closed state, so that the average temperature of the electrolyte in the electrolytic cell is improved through the high-temperature electrolyte provided by the heat-preservation tank.
It should be particularly noted that the capacity of the electrolytic cell is limited, which corresponds to a preset capacity range meeting normal working requirements, and when the insulation tank and the liquid replenishing device are controlled to adjust the electrolyte in the electrolytic cell, it is also required to ensure that the capacity in the electrolytic cell is within the preset capacity range, therefore, the control method provided by the embodiment of the invention can also monitor the current capacity of the electrolyte in the electrolytic cell, and control the insulation tank and the liquid replenishing device to adjust the electrolyte in the electrolytic cell on the premise that the current capacity of the electrolyte in the electrolytic cell is within the preset capacity range.
In summary, according to the hydrogen production electrolyte temperature control method provided by the embodiment of the invention, when the current temperature of the electrolyte is not within the preset temperature range, the temperature of the electrolyte in the thermal insulation tank and the electrolyte supplementing device are controlled to adjust the electrolyte in the electrolytic cell, and since the temperature of the electrolyte in the thermal insulation tank is higher than the temperature of the electrolyte in the electrolyte supplementing device, the average temperature of the electrolyte in the electrolytic cell can be increased through the cooperation of the two devices, so that the electric energy required for heating the electrolyte to the preset temperature range is reduced, meanwhile, the heating time is shortened, and the hydrogen production efficiency is improved.
Optionally, referring to fig. 4, in a case that the hydrogen production system is provided with a heating device, another temperature control method is further provided in an embodiment of the present invention, and on the basis of the embodiment shown in fig. 3, the temperature control method provided in this embodiment further includes:
s130, judging whether the release of the electrolyte stored in the heat preservation tank is finished or not, or whether the capacity of the electrolyte in the electrolytic cell reaches a preset capacity threshold value or not, and if so, executing S140.
In the whole process of the embodiment, the temperature control method provided by the embodiment is mainly applied to the case that the current temperature of the electrolyte in the electrolytic cell is lower than the lower limit value of the preset temperature range, and in this case, the heat-preservation tank is controlled to release the high-temperature electrolyte to the electrolytic cell, and the liquid supplementing device is in a closed state. If the release of the electrolyte in the heat preservation tank is finished, or the capacity of the electrolyte in the electrolytic cell reaches a preset capacity threshold value, it indicates that the high-temperature electrolyte cannot be continuously released into the electrolytic cell, and then S140 is further executed; on the contrary, if the electrolyte in the heat preservation tank is not released completely and the electrolytic cell can also contain more electrolyte, the heat preservation tank is controlled to release the electrolyte to the electrolytic cell continuously.
S140, judging whether the temperature of the electrolyte in the electrolytic cell is not within a preset temperature range, if so, executing S150.
Under the condition that high-temperature electrolyte cannot be continuously released to the electrolytic cell, judging whether the temperature of the electrolyte in the electrolytic cell is still not within a preset temperature range, if so, executing S150; on the contrary, if the temperature of the electrolyte in the electrolytic cell is within the preset temperature range after the adjustment of the heat-preserving tank, the hydrogen production process can be directly started.
S150, controlling the heating device to heat the electrolyte in the electrolytic cell until the temperature of the electrolyte in the electrolytic cell is within a preset temperature range.
If the temperature of the electrolyte in the electrolytic cell is not within the preset temperature range through the adjustment of the heat preservation tank, specifically, the temperature of the electrolyte in the electrolytic cell is still lower than the lower limit value of the preset temperature range, the heating device is controlled to heat the electrolyte in the electrolytic cell until the temperature of the electrolyte in the electrolytic cell is within the preset temperature range.
In summary, according to the temperature control method provided by this embodiment, on the premise that the temperature of the electrolyte in the electrolytic cell is adjusted by the heat-preserving tank and the liquid replenishing device, the temperature of the electrolyte can be further adjusted by the heating device, and the hydrogen production process can be effectively ensured to be smoothly performed. Moreover, if the hydrogen production power supply is realized by a photovoltaic module, the electric energy required by the heating device for heating the electrolyte can be directly provided by the photovoltaic module, and compared with the mode that the heating device directly takes electricity from an alternating current power grid in the prior art, the utilization rate of the electric energy output by the photovoltaic module can be improved, and meanwhile, the consumption of the electric energy of the power grid can be further reduced.
Optionally, if the hydrogen production power supply is implemented by using a photovoltaic module, considering that the photovoltaic module outputs electric power only in the daytime, therefore, before hydrogen production starts, especially in the process from the last natural day to the current natural day, it is necessary to determine whether hydrogen production can start, based on which, the foregoing step S100 may be further refined into an optional implementation process shown in fig. 5:
s1001, obtaining target operation parameters of the hydrogen production system.
The target operation parameters mainly refer to parameters affecting the hydrogen production process of the hydrogen production system, for example, under the condition that the hydrogen production power source adopts a photovoltaic module, the output power of the photovoltaic module affects important parameters affecting the hydrogen production process. It is conceivable that the photovoltaic module outputs electric power only during the daytime as described above, and therefore, whether the current time is during the daytime may be the target operating parameter, but considering that the output power of the photovoltaic module may be insufficient to drive the hydrogen production process even during the daytime, it is more direct and accurate to use the output power of the photovoltaic module as the target operating parameter.
The specific configuration of the hydrogen production system varies, and the selection of target operating parameters may vary, and fall within the scope of the present invention without departing from the scope of the core concept of the present invention.
And S1002, judging whether the target operation parameters meet preset starting conditions, and if so, executing S1003.
Based on the above, if the target operation parameter is the output power of the hydrogen production power supply in the hydrogen production system, judging whether the duration of the output power of the hydrogen production power supply being greater than the preset power threshold is greater than or equal to the preset duration threshold, and if the duration is greater than the preset duration threshold, determining that the preset starting condition is met; on the contrary, if the output power of the hydrogen production power supply is less than or equal to the preset power threshold, or the duration is less than the preset duration threshold, it is determined that the preset starting condition is not met.
The selection of the preset power threshold and the preset duration threshold needs to be determined by combining specific parameters of the hydrogen production system and the operating environment, and specific values of the two are not limited in the invention.
S1003, obtaining the current temperature of the electrolyte in the electrolytic cell.
Optionally, the execution process of S1003 may refer to the foregoing, and will not be repeated here.
Optionally, on the basis of any of the above embodiments, the hydrogen production electrolyte temperature control method provided by the present invention may further include: and obtaining a shutdown instruction, controlling the heat-preservation tank to store the electrolyte in the electrolytic cell according to the obtained shutdown instruction, storing high-temperature electrolyte through the heat-preservation tank, and adjusting the temperature of the electrolyte in the electrolytic cell when the next hydrogen production cycle begins. Of course, this step is performed on the premise that the insulating tank still has a remaining space for storing the electrolyte at a high temperature.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (15)
1. A temperature control method for hydrogen production electrolyte is characterized by being applied to a hydrogen production system, wherein the hydrogen production system comprises a heat preservation tank and a liquid supplementing device which are respectively connected with an electrolytic bath, and the method comprises the following steps:
obtaining the current temperature of the electrolyte in the electrolytic cell;
if the current temperature is not within the preset temperature range, controlling the heat-preserving tank and the liquid supplementing device to adjust the electrolyte in the electrolytic cell;
and the temperature of the electrolyte in the heat preservation tank is higher than that of the electrolyte in the liquid supplementing device.
2. The hydrogen production electrolyte temperature control method according to claim 1, wherein if the current temperature is higher than the upper limit value of the preset temperature range, the controlling the heat-preserving tank and the liquid-replenishing device to adjust the electrolyte in the electrolytic cell comprises:
controlling the heat-preservation tank to store the electrolyte in the electrolytic bath;
and controlling the liquid supplementing device to release the electrolyte into the electrolytic cell.
3. The hydrogen production electrolyte temperature control method according to claim 1, wherein if the current temperature is lower than the lower limit value of the preset temperature range, the controlling the holding tank and the liquid replenishing device to adjust the electrolyte in the electrolytic cell comprises:
controlling the heat-preservation tank to release electrolyte into the electrolytic cell;
and maintaining the liquid supplementing device in a closed state.
4. The hydrogen-producing electrolyte temperature control method according to claim 1, wherein the controlling the holding tank and the liquid replenishing device to adjust the electrolyte in the electrolytic cell comprises:
monitoring the current capacity of the electrolyte in the electrolytic cell;
and on the premise that the current capacity is within a preset capacity range, controlling the heat-preserving tank and the liquid supplementing device to adjust the electrolyte in the electrolytic cell.
5. The hydrogen-producing electrolyte temperature control method according to claim 3, wherein the hydrogen-producing system further comprises a heating device, the method further comprising:
if the release of the electrolyte stored in the heat-preserving tank is finished or the capacity of the electrolyte in the electrolytic cell reaches a preset capacity threshold value, the temperature of the electrolyte in the electrolytic cell is not in the preset temperature range,
and controlling the heating device to heat the electrolyte in the electrolytic cell until the temperature of the electrolyte in the electrolytic cell is within the preset temperature range.
6. The hydrogen production electrolyte temperature control method according to claim 2, wherein if the temperature of the electrolyte in the electrolytic cell is not within the preset temperature range under the condition that the heat-preserving tank is full and the electrolyte in the electrolytic cell reaches a preset capacity threshold value, warning information indicating that the temperature of the electrolyte is too high is sent.
7. The hydrogen-producing electrolyte temperature control method according to claim 2, wherein the controlling the holding tank to store the electrolyte in the electrolytic cell comprises:
controlling a liquid inlet of the heat-preserving tank to be opened, and monitoring the residual capacity of the heat-preserving tank;
and if the residual capacity reaches a preset safety threshold value, controlling a liquid inlet of the heat-preserving tank to be closed.
8. The hydrogen-producing electrolyte temperature control method according to claim 2, wherein the controlling the holding tank to store the electrolyte in the electrolytic cell comprises:
controlling the opening of a liquid inlet of the heat preservation tank, and monitoring the liquid level of the electrolyte in the heat preservation tank;
and if the liquid level of the electrolyte in the heat-preserving tank reaches a preset liquid level threshold value, controlling the liquid inlet of the heat-preserving tank to be closed.
9. The hydrogen-producing electrolyte temperature control method according to any one of claims 1 to 8, wherein the obtaining of the current temperature of the electrolyte in the electrolytic cell comprises:
obtaining target operating parameters of the hydrogen production system;
judging whether the target operation parameters meet preset starting conditions or not;
and if the target operation parameter meets a preset starting condition, acquiring the current temperature of the electrolyte in the electrolytic cell.
10. The hydrogen-producing electrolyte temperature control method of claim 9 wherein the target operating parameters include output power of a hydrogen-producing power source in the hydrogen-producing system;
the judging whether the target operation parameter meets a preset starting condition comprises the following steps:
judging whether the duration of the output power of the hydrogen production power supply which is greater than the preset power threshold is greater than or equal to the preset duration threshold or not;
if the duration is greater than the preset duration threshold, judging that a preset starting condition is met;
and if the output power of the hydrogen production power supply is less than or equal to the preset power threshold, or the duration is less than the preset duration threshold, judging that the preset starting condition is not met.
11. The hydrogen production electrolyte temperature control method according to any one of claims 1 to 8, characterized by further comprising:
obtaining a shutdown instruction;
and responding to the stop instruction, and controlling the heat-preserving tank to store the electrolyte in the electrolytic cell.
12. A hydrogen production system, comprising: a hydrogen production power supply, an electrolytic bath, a hydrogen storage tank, a liquid supplementing device, a heat preservation tank and a hydrogen production controller,
the hydrogen production power supply is connected with the electrolytic bath;
the electrolytic bath is respectively connected with the hydrogen storage tank, the liquid supplementing device and the heat preservation tank;
the hydrogen production controller is respectively connected with the hydrogen production power supply, the electrolytic bath, the hydrogen storage tank, the liquid supplementing device and the heat preservation tank;
the hydrogen production controller executes the hydrogen production electrolyte temperature control method according to any one of claims 1 to 11.
13. The hydrogen production system of claim 12, further comprising: a first power conversion device and a heating device, wherein,
the input end of the first power conversion device is connected with the hydrogen production power supply;
the output end of the first power conversion device is connected with the heating device;
the hydrogen production controller is respectively connected with the first power conversion device and the heating device;
the heating device is used for heating the electrolyte in the electrolytic cell.
14. The hydrogen production system of claim 12, further comprising: a second power conversion device, wherein,
the second power conversion device is connected between the hydrogen production power supply and the electrolytic bath.
15. The hydrogen generation system as claimed in any one of claims 12 to 14, wherein the hydrogen generation power source comprises a photovoltaic module.
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