CN115012000A - Control method and control system for operation temperature of electrolytic cell - Google Patents
Control method and control system for operation temperature of electrolytic cell Download PDFInfo
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- CN115012000A CN115012000A CN202210754191.5A CN202210754191A CN115012000A CN 115012000 A CN115012000 A CN 115012000A CN 202210754191 A CN202210754191 A CN 202210754191A CN 115012000 A CN115012000 A CN 115012000A
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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
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
- C25B15/021—Process control or regulation of heating or cooling
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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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Abstract
The embodiment of the invention discloses a control method and a control system for the running temperature of an electrolytic cell, wherein the method comprises the steps of acquiring the actual pre-cell temperature and the actual post-cell temperature of the electrolytic cell, which are acquired by a data acquisition component; if the difference value between the actual temperature before the tank and the preset temperature before the tank is in a preset range, adjusting the flow and/or the temperature of the refrigerant to control the liquid inlet temperature of the electrolyte; determining the opening degree of a controller for adjusting the refrigerant based on the actual temperature before the tank and the preset temperature before the tank in the current iteration period; and when the subsequent iteration period of the current iteration period starts, determining the set temperature before the iteration based on the acquired actual temperature after the tank, the preset temperature after the tank, the correction coefficient and the set temperature before the tank in the previous iteration period, and adjusting the opening of the controller of the refrigerant based on the set temperature before the iteration. The control precision and the sensitivity of the running temperature of the electrolytic cell can be improved, the large fluctuation of the cell temperature is avoided, and the running safety and the running stability of the electrolytic cell are improved.
Description
Technical Field
The invention relates to the technical field of hydrogen and oxygen production by water electrolysis, in particular to a control method and a control system for the running temperature of an electrolytic cell.
Background
The water electrolysis hydrogen production belongs to the reaction process of converting electric energy into chemical energy, and the energy conversion efficiency of the industrial electrolytic cell in the electrolysis process cannot reach 100 percent due to the limitation of the operation condition, and the part of unconverted electric energy can be converted into heat. When the heat dissipation power of the electrolytic cell body is smaller than the heating power, the temperature of the electrolytic cell can be gradually increased, and the temperature of the electrolyte at the outlet of the electrolytic cell is higher than that at the inlet of the electrolytic cell. In order to maintain the normal operation of the electrolytic cell, the operation temperature of the electrolytic cell needs to be controlled.
The traditional water electrolysis bath temperature control methods are roughly two. A method for controlling the temperature in front of a tank comprises the following control logics: the method is characterized in that the temperature before the electrolytic cell is set, the temperature before the electrolytic cell is monitored, the action of a cooling system is determined according to the actual temperature before the electrolytic cell and the set temperature before the electrolytic cell, and then the temperature before the electrolytic cell is adjusted. The other is a tank back temperature control method, and the control logic is as follows: the method comprises the steps of setting the temperature behind the electrolytic cell, monitoring the temperature behind the electrolytic cell, determining the action of a cooling system according to the actual temperature behind the electrolytic cell and the set temperature behind the electrolytic cell, and further adjusting the temperature behind the electrolytic cell.
Disclosure of Invention
In view of the above problems in the prior art, embodiments of the present invention provide a control method and a control system capable of stably controlling the operating temperature of an electrolytic cell.
The method for controlling the operation temperature of the electrolytic cell provided by the embodiment of the invention comprises the following steps:
acquiring the actual temperature before the electrolytic cell and the actual temperature after the electrolytic cell, which are acquired by a data acquisition component;
if the difference value between the actual temperature before the tank and the preset temperature before the tank is in a preset range, adjusting the flow and/or the temperature of a refrigerant to control the liquid inlet temperature of the electrolyte;
in the current iteration period, determining the opening degree of a controller for adjusting the refrigerant based on the actual temperature before the tank and the preset temperature before the tank;
and when the subsequent iteration period of the current iteration period starts, determining the set tank front temperature after iteration based on the acquired actual tank rear temperature, the preset tank rear temperature, the correction coefficient and the set tank front temperature in the previous iteration period, and adjusting the opening of the controller of the refrigerant based on the set tank front temperature after iteration.
In some embodiments of the invention, the time of the iteration cycle is not less than the time of the electrolyte flowing from the front of the cell to the back of the cell.
In some embodiments of the invention, the correction factor is used to control the rate of adjusting the temperature of the electrolytic cell, the correction factor being not less than 0.
In some embodiments of the present invention, the data acquisition device employs temperature sensors and is respectively installed at the electrolyte inlet and the electrolyte outlet of the electrolytic cell, and the data acquisition device is configured to send a temperature signal to the control unit.
In some embodiments of the invention, the control unit comprises at least a PLC, a safety barrier, a relay and an electrical converter electrically connected.
In some embodiments of the invention, the heat exchange unit of the electrolysis cell employs a heat exchanger.
In some embodiments of the present invention, the cooling medium is industrial cooling water to cool the electrolyte.
In some embodiments of the present invention, the controller of the refrigerant is configured to continuously adjust the refrigerant flow rate.
The embodiment of the invention also provides a control system for the operation temperature of the electrolytic cell, which comprises the following components:
a data acquisition component for acquiring an actual pre-bath temperature and an actual post-bath temperature of the electrolytic bath;
the control unit is used for sending a control signal to a controller of a refrigerant when the difference value between the actual temperature before the tank and the preset temperature before the tank is within a preset range so as to adjust the flow and/or the temperature of the refrigerant to control the liquid inlet temperature of the electrolyte, and determining the opening degree of the controller for adjusting the refrigerant based on the actual temperature before the tank and the preset temperature before the tank in the current iteration period; and when the subsequent iteration period of the current iteration period starts, determining the set tank front temperature after iteration based on the acquired actual tank rear temperature, the preset tank rear temperature, the correction coefficient and the set tank front temperature in the previous iteration period, and sending an opening adjusting instruction to the controller of the refrigerant based on the set tank front temperature after iteration.
In some embodiments of the present invention, the data acquisition device employs temperature sensors and is respectively installed at the electrolyte inlet and the electrolyte outlet of the electrolytic cell, and the data acquisition device is configured to send a temperature signal to the control unit.
In some embodiments of the invention, the control unit comprises at least a PLC, a safety barrier, a relay and an electrical converter electrically connected.
Compared with the prior art, the control method and the control system for the operation temperature of the electrolytic cell provided by the embodiment of the invention have the beneficial effects that: the control precision and sensitivity of the operation temperature of the electrolytic cell can be improved, the large fluctuation of the cell temperature is avoided, and the operation safety and stability of the electrolytic cell are improved. Furthermore, the temperature of the electrolytic cell is relatively stable, so that the operation temperature of the electrolytic cell can be properly increased, and the energy consumption in the electrolytic process can be reduced.
Drawings
FIG. 1 is a schematic control diagram of a method for controlling the operating temperature of an electrolytic cell according to an embodiment of the present invention;
FIG. 2 is a graph comparing a temperature profile of an electrolytic cell to which the method for controlling the operating temperature of an electrolytic cell according to the embodiment of the present invention is applied with an operating temperature profile in an electrolytic cell of the prior art;
FIG. 3 is a graph comparing the total voltage applied to the electrolytic cell in the prior art after the method for controlling the operating temperature of the electrolytic cell according to the embodiment of the present invention is applied to the electrolytic cell.
Reference numerals
1. An electrolytic cell; 2. a post-bath temperature monitoring point; 3. a heat exchange unit, 4, electrolyte, 5 and a tank front temperature monitoring point; 6. refrigerant flow controller, 7, refrigerant.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Various aspects and features of the present application are described herein with reference to the accompanying drawings.
These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It should also be understood that, although the present application has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and structures have not been described in detail so as to not unnecessarily obscure the present application with unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
The embodiment of the invention provides a method for controlling the running temperature of an electrolytic cell, which can be applied to an electrolytic cell 1 with a data acquisition component, a control unit and a corresponding execution component, and specifically can automatically monitor the temperature of the electrolytic cell 1 through the data acquisition component (which can be a temperature acquisition device) and transmit the monitored data to the control unit, the control unit executes a cell temperature control logic and controls the action of the execution component based on the received monitored data, and the execution component can be a refrigerant flow controller 6, a refrigerant 7 generation device and the like, as shown in fig. 1 to 3, the method specifically comprises the following steps:
acquiring the actual temperature before the electrolytic cell 1 and the actual temperature after the electrolytic cell, which are acquired by a data acquisition component;
if the difference value between the actual temperature before the tank and the preset temperature before the tank is in a preset range, adjusting the flow and/or the temperature of the refrigerant 7 to control the liquid inlet temperature of the electrolyte 4; specifically, in the actual operation process, because the cooling water film regulating valve adopts PID control, when the actual temperature in front of the tank does not reach the set value, the film regulating valve actually starts to operate, for example, the set temperature is 90 ℃, the actual temperature is around 85 ℃, the opening degree of the film regulating valve has been gradually increased from 0, that is, PID regulation is advanced, and further the preset range can be set to-10 to 10 degrees, that is, when the absolute value of the difference between the actual temperature and the temperature in front of the preset tank is less than 10 degrees, the flow rate and/or the temperature of the refrigerant 7 is adjusted to control the liquid inlet temperature of the electrolyte 4.
In the current iteration period, determining the opening degree of a controller for adjusting the refrigerant 7 based on the actual temperature before the tank and the preset temperature before the tank; in this embodiment, when the temperature of the electrolyte needs to be lowered or raised, the cooling water flow is generally increased or decreased by using a method of adjusting the opening of the membrane regulating valve, and in addition, the temperature of the refrigerant can be adjusted, or the heat exchange area can be adjusted (for example, only one heat exchanger is started at the beginning, and one heat exchanger is started again when heat exchange needs to be increased), or the heat exchange coefficient can be adjusted (the flow of the electrolyte is increased), or other heat exchange methods can be started, such as air cooling, to adjust the temperature of the electrolyte.
And when the subsequent iteration period of the current iteration period starts, determining the set tank front temperature after the iteration based on the acquired actual tank rear temperature, the preset tank rear temperature, the correction coefficient and the set tank front temperature in the previous iteration period, and adjusting the opening of the controller of the refrigerant 7 based on the set tank front temperature after the iteration.
In the above embodiment, the difference between the actual temperature before the bath and the preset temperature before the bath is within the preset range may be that the absolute value of the difference between the actual temperature before the bath and the preset temperature before the bath is within a set temperature range, and the set temperature range may be selected from 0 to 10 degrees, or may be set from 0 to 100 degrees, which is not limited herein. For example, if the preset pre-bath temperature is set to 90 degrees and the control method is to perform the iterative process at the beginning, the actual pre-bath temperature can be set to normal temperature when the electrolytic bath starts to operate, for example, 25 degrees, at this time, the set temperature range can be known to be 0-65 degrees, but if the control method starts to perform the iterative process when the actual pre-bath temperature is normal temperature, the iterative process is calculated for a long time, and the iterative process has been calculated for many times during the process that the actual pre-bath temperature reaches the preset pre-bath temperature, and the obtained calculated value has a limited beneficial effect on the actual temperature control of the electrolytic bath; through a plurality of tests, it can be finally determined that better control effect can be obtained by controlling the operation temperature when the actual temperature before the tank is close to the preset temperature before the tank, and unnecessary iterative processing calculation in the early stage can be reduced, so that the difference value between the actual temperature before the tank and the preset temperature before the tank can be set in a preset range of-10 ℃ to 10 ℃, namely, the set temperature range is 0-10 ℃.
As can be seen from the above technical solutions, the control method provided in the above embodiments of the present invention specifically adopts a periodic iteration mode, and the specific control logic is as follows: the method comprises the steps of presetting the temperature before the electrolytic cell 1 and the temperature after the electrolytic cell 1 as a preset temperature before the electrolytic cell and a preset temperature after the electrolytic cell, which can be respectively marked as T front temperature and T rear temperature, further enabling a control unit to automatically monitor and collect the actual temperature before the electrolytic cell (Tfront) and the actual temperature after the electrolytic cell (Trear) through a data collection device, controlling the opening degree of a refrigerant flow controller 6 by comparing the actual temperature before the electrolytic cell and the preset temperature before the electrolytic cell in the current iteration period, and when the next iteration period S begins, multiplying the difference value between the actual temperature after the electrolytic cell (Trear) and the preset temperature after the electrolytic cell (Trear) by a correction coefficient alpha, iterating the preset temperature before the electrolytic cell according to subtraction logic to obtain the preset temperature before the electrolytic cell after the iteration (which can be marked as T front temperature'), namely,
before T,' -alpha.before T (after T and after T),
then, in the iteration cycle, the control unit controls the action of the execution component (controls the refrigerant flow controller 6) by comparing the actual temperature before the tank (Tfront) with the set temperature before the tank (Tfront') after the iteration, so as to adjust the flow or temperature of the refrigerant 7 and further adjust the liquid inlet temperature of the electrolyte 4, thereby realizing the stable control of the operation temperature of the electrolytic tank.
In some embodiments of the present invention, the correction coefficient is used to control the speed of adjusting the temperature of the electrolytic cell 1, and the correction coefficient is not less than 0, and can be set according to the actual speed of adjusting the temperature of the electrolytic cell 1.
Further, in this embodiment, the data acquisition device employs a temperature sensor, for example, the temperature sensor may employ a platinum resistor, and is respectively installed at an inlet and an outlet of the electrolyte 4 of the electrolytic cell 1, wherein the outlet includes a hydrogen outlet and an oxygen outlet, the data acquisition device is configured to send a temperature signal to the control unit, for example, the temperature signal may be a 4-20 ma signal, and of course, the temperature signal may also be sent as a voltage signal of 0-5V, or a photoelectric signal, a network transmission signal, and the like. In addition, in this embodiment, the mode that the temperature measuring device is installed outside the pipeline can be adopted to realize temperature measurement, and in addition, an infrared temperature measuring gun can be adopted to collect temperature signals.
Meanwhile, in this embodiment, the control unit at least includes a PLC, a safety grid, a relay, and an electrical converter, which are electrically connected, wherein the PLC may be replaced with a DCS or a single chip microcomputer to perform control.
In this embodiment, the heat exchange unit 3 of the electrolytic cell 1 is a heat exchanger, and the heat exchanger may be a tube type heat exchanger as an example, wherein the electrolyte 4 flows through a tube side of the tube type heat exchanger, and the refrigerant 7 flows through a shell side of the tube type heat exchanger. The refrigerant 7 adopts industrial cooling water, and the industrial cooling water flows through the tube type heat exchanger to cool the electrolyte 4. In this embodiment, the heat exchange unit 3 may also be a floating head heat exchanger, a plate heat exchanger, or the like, which is not specifically limited herein, and the refrigerant 7 may also be any one of chilled water, ethanol, and kerosene.
In addition, in this embodiment, the controller of the cooling medium 7 is configured to continuously adjust the flow rate of the cooling medium 7, so as to adjust the temperature of the electrolyte 4, and the controller may be a membrane regulating valve, for example.
The embodiment can improve the control precision and sensitivity of the operation temperature of the electrolytic cell, avoid the large fluctuation of the cell temperature and improve the operation safety and stability of the electrolytic cell 1. Furthermore, because the temperature of the electrolytic cell 1 is relatively stable, the operation temperature of the electrolytic cell 1 can be properly increased, and the energy consumption in the electrolytic process can be reduced.
For facilitating understanding of the above technical solution, as an example, the preset pre-bath temperature (tparf) set by the user is 75 ℃, the preset post-bath temperature (tparf) is 90 ℃, the iteration period S is 120S, and the correction coefficient α is 1, specifically:
when the electrolysis equipment is just started, the control unit acquires the actual pre-tank temperature (before T) through the data acquisition part at the pre-tank temperature monitoring point 55, acquires the actual post-tank temperature (after T) at the post-tank temperature monitoring point 22, and at the moment, the flow controller 6 of the refrigerant does not act when the temperature before T is less than that before T.
Along with the extension of the operation time, the temperature before the actual bath (before T) and the temperature after the actual bath (after T) are gradually increased, when | before T-before T is set to | be less than or equal to 10 ℃, the control unit controls the refrigerant flow controller 6 to act to start cooling the circulating electrolyte 4, and simultaneously, a timer in the control logic of the control unit starts timing.
When S < 120S, the preset T is set to be 75 ℃, the control unit controls the opening degree of the refrigerant flow controller 6 by comparing the preset T with the preset T, and further adjusts the preset T to gradually converge towards the preset T.
When the iteration period S is 120 seconds, at this time, S is 120 seconds, which is an example value, in the actual operation process, the electrolyte may flow from the electrolytic cell 1 to the electrolytic cell 1 for 2 minutes to 20 minutes, if 10 minutes, but the iteration period is 120 seconds (2 minutes), then 5 iterations are performed in the pre-cell temperature accumulation before the post-cell temperature of the electrolytic cell 1 reacts, for example, 5 times of 5 ℃ in the case, and the pre-cell temperature set value may reach 100 degrees, which is unreasonable, so the iteration period is very important, and then the upper and lower limits of the pre-cell temperature set value are set in the actual application process.
In some embodiments of the invention, the time of the iteration cycle is not less than the time of the electrolyte 4 flowing from the front of the cell to the back of the cell 1.
Before T, execution iteration is set, and the iteration algorithm is as follows:
before T,' -before T, - (after T-after) x 1,
that is, the set pre-tank temperature after iteration is tparf', and the operating logic of the control method is described here assuming three cases:
1. after T is less than T, if after T is 85 ℃, then before T is 75- (85-90) × 1 is 80 ℃, at this time, the set temperature before the cell after iteration is increased, and the control unit controls the opening degree of the refrigerant flow controller 6 to be reduced, so that the liquid inlet temperature of the electrolyte 4, namely the actual temperature before the cell (before T), is increased, and thus the temperature of the electrolyte 4 at the outlet of the electrolytic cell 1, namely the actual temperature after the cell (after T), is increased, and is set to be close to the rear T;
2. after T is set to T, then before T is set to 75- (90-90) × 1 is set to 75 ℃, at this time, the set pre-tank temperature after iteration is unchanged, the control unit controls the opening of the refrigerant flow controller 6 to be unchanged, the actual pre-tank temperature (before T) and the actual post-tank temperature (after T) are unchanged, and the system temperature stably operates;
3. after T > after T, if after T is 95 ℃, then before T is 75- (95-90) × 1 is 70 ℃, at this time, the set pre-tank temperature after iteration is decreased, and the control unit controls the opening degree of the refrigerant flow controller 6 to be increased, so that the feed temperature of the electrolyte 4, that is, the actual pre-tank temperature (before T), is decreased, and the temperature of the electrolyte 4 at the outlet of the electrolytic tank 1, that is, the actual post-tank temperature (after T), is decreased, and is set closer to the rear T.
After the next iteration period is reached, the iteration is continued before T, and the control unit controls the operation state of the electrolytic cell 1 according to the change of the opening degree of the refrigerant flow controller 6 controlled by the operation logic. After a plurality of iteration cycles, the actual post-bath temperature (post-T) of the electrolytic bath 1 tends to the pre-set post-bath temperature (post-T), so that the stable control of the operation temperature of the electrolytic bath is realized.
The embodiment of the invention also provides a control unit for the operation temperature of the electrolytic cell, which comprises:
data acquisition means for acquiring an actual pre-cell temperature and an actual post-cell temperature of the electrolytic cell 1;
the control unit is used for sending a control signal to a controller of the refrigerant 7 when the difference value between the actual temperature before the tank and the preset temperature before the tank is within a preset range so as to adjust the flow and/or the temperature of the refrigerant 7 to control the liquid inlet temperature of the electrolyte 4, and determining the opening of the controller for adjusting the refrigerant 7 based on the actual temperature before the tank and the preset temperature before the tank in the current iteration cycle; and when the subsequent iteration period of the current iteration period starts, determining the set tank front temperature after iteration based on the acquired actual tank rear temperature, the preset tank rear temperature, the correction coefficient and the set tank front temperature in the previous iteration period, and sending an opening degree adjusting instruction to the controller of the refrigerant 7 based on the set tank front temperature after iteration.
In some embodiments of the invention, the time of the iteration cycle is not less than the time of the electrolyte 4 flowing from the front of the cell to the back of the cell 1.
In some embodiments of the present invention, the data acquisition device employs temperature sensors, which may employ platinum resistors, and are respectively installed at the inlet and the outlet of the electrolyte 4 of the electrolytic cell 1, and the data acquisition device is configured to send a temperature signal to the control unit, which may be a 4-20 ma signal, for example.
In some embodiments of the invention, the control unit comprises at least a PLC, a safety barrier, a relay and an electrical converter electrically connected.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (10)
1. A method of controlling the operating temperature of an electrolytic cell, comprising:
acquiring the actual temperature before the electrolytic cell and the actual temperature after the electrolytic cell, which are acquired by a data acquisition component;
if the difference value between the actual temperature before the tank and the preset temperature before the tank is in a preset range, adjusting the flow and/or the temperature of a refrigerant to control the liquid inlet temperature of the electrolyte;
in the current iteration period, determining the opening degree of a controller for adjusting the refrigerant based on the actual temperature before the tank and the preset temperature before the tank;
and when the subsequent iteration period of the current iteration period starts, determining the set tank front temperature after iteration based on the acquired actual tank rear temperature, the preset tank rear temperature, the correction coefficient and the set tank front temperature in the previous iteration period, and adjusting the opening of the controller of the refrigerant based on the set tank front temperature after iteration.
2. The method of controlling the operating temperature of an electrolytic cell according to claim 1,
the time of the iteration cycle is not less than the time of the electrolyte flowing from the front of the electrolytic cell to the back of the electrolytic cell.
3. The method of controlling the operating temperature of an electrolytic cell according to claim 2,
the correction coefficient is used for controlling the speed of adjusting the temperature of the electrolytic bath, and the correction coefficient is not less than 0.
4. The method of controlling the operating temperature of an electrolytic cell according to claim 3,
the data acquisition device adopts temperature sensor, and install respectively in the electrolyte import and the export of electrolysis trough, the data acquisition device is used for sending temperature signal to the control unit, the control unit includes PLC, safety grid, relay and the electrical converter of electricity connection at least.
5. The method of controlling the operating temperature of an electrolytic cell according to claim 4,
the heat exchange unit of the electrolytic cell adopts a heat exchanger.
6. The method of controlling the operating temperature of an electrolytic cell according to claim 5,
the coolant is industrial cooling water to cool the electrolyte.
7. The method of controlling the operating temperature of an electrolytic cell according to claim 6,
the controller of the refrigerant is used for continuously adjusting the flow of the refrigerant.
8. A control system for operating temperature of an electrolytic cell, comprising:
a data acquisition component for acquiring an actual pre-cell temperature and an actual post-cell temperature of the electrolytic cell;
the control unit is used for sending a control signal to a controller of a refrigerant to adjust the flow and/or temperature of the refrigerant to control the electrolyte inlet liquid temperature when the difference value between the actual temperature before the tank and the preset temperature before the tank is within a preset range, and determining the opening of the controller for adjusting the refrigerant based on the actual temperature before the tank and the preset temperature before the tank in the current iteration period; and when the subsequent iteration period of the current iteration period starts, determining the set tank front temperature after iteration based on the acquired actual tank rear temperature, the preset tank rear temperature, the correction coefficient and the set tank front temperature in the previous iteration period, and sending an opening adjusting instruction to the controller of the refrigerant based on the set tank front temperature after iteration.
9. The control system of the operating temperature of the electrolytic cell of claim 8,
the data acquisition device adopts a temperature sensor and is respectively arranged at an electrolyte inlet and an electrolyte outlet of the electrolytic cell, and the data acquisition device is used for sending a temperature signal to the control unit.
10. The control system of the operating temperature of the electrolytic cell of claim 9,
the control unit at least comprises a PLC, a safety grid, a relay and an electric converter which are electrically connected.
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| CN114411165A (en) * | 2021-12-31 | 2022-04-29 | 佛山仙湖实验室 | PEM water electrolysis hydrogen production water body temperature control method, system, equipment and medium |
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| JP2020128576A (en) * | 2019-02-08 | 2020-08-27 | 東芝エネルギーシステムズ株式会社 | Control device and control method of hydrogen production plant |
| CN112899726A (en) * | 2021-01-18 | 2021-06-04 | 阳光电源股份有限公司 | Water electrolysis hydrogen production system and control method thereof |
| CN113430570A (en) * | 2021-07-16 | 2021-09-24 | 阳光新能源开发有限公司 | Hydrogen production electrolyte temperature control method and hydrogen production system |
| CN215628322U (en) * | 2021-09-17 | 2022-01-25 | 中国华能集团清洁能源技术研究院有限公司 | Heat integration system for dynamic hydrogen production process |
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| CN114059084A (en) * | 2021-12-14 | 2022-02-18 | 阳光电源股份有限公司 | Electrolytic hydrogen production system and temperature control method and device thereof |
| CN114411165A (en) * | 2021-12-31 | 2022-04-29 | 佛山仙湖实验室 | PEM water electrolysis hydrogen production water body temperature control method, system, equipment and medium |
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