CN115012000B - Control method and control system for running temperature of electrolytic tank - Google Patents
Control method and control system for running temperature of electrolytic tank Download PDFInfo
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- CN115012000B CN115012000B CN202210754191.5A CN202210754191A CN115012000B CN 115012000 B CN115012000 B CN 115012000B CN 202210754191 A CN202210754191 A CN 202210754191A CN 115012000 B CN115012000 B CN 115012000B
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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
-
- 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
Abstract
The embodiment of the application 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 acquired by a data acquisition component; if the difference value between the actual pre-tank temperature and the preset pre-tank temperature is within a preset range, regulating the flow rate and/or the temperature of the refrigerant to control the inlet liquid temperature of the electrolyte; determining the opening of a controller for adjusting the refrigerant based on the actual pre-tank temperature and the preset pre-tank temperature in the current iteration period; and when the subsequent iteration period of the current iteration period starts, determining the set pre-tank temperature after iteration based on the acquired actual post-tank temperature, the preset post-tank temperature, the correction coefficient and the set pre-tank temperature in the previous iteration period, and adjusting the opening of the controller of the refrigerant based on the set pre-tank temperature after iteration. The control precision and the sensitivity of the running temperature of the electrolytic tank can be improved, the great fluctuation of the temperature of the electrolytic tank is avoided, and the running safety and stability of the electrolytic tank are improved.
Description
Technical Field
The application relates to the technical field of oxyhydrogen preparation 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 a reaction process for converting electric energy into chemical energy, the energy conversion efficiency of an industrial electrolytic tank cannot reach 100% due to the limitation of operation conditions, and the unconverted electric energy can be converted into heat. When the heat dissipation power of the electrolytic tank body is smaller than the heating power, the temperature of the electrolytic tank can be gradually increased, and the temperature of the electrolyte at the outlet of the electrolytic tank is higher than that at the inlet. In order to maintain the normal operation of the electrolyzer, the operating temperature of the electrolyzer is controlled.
There are two general ways of controlling the temperature of a conventional water electrolyzer. A control method for the temperature before a groove is provided, and the control logic is as follows: the method is characterized in that the temperature before the tank is set, the temperature before the tank is monitored, the action of a cooling system is determined according to the actual temperature before the tank and the set temperature before the tank, and then the temperature before the tank is regulated. The other is a post-slot temperature control method, and the control logic is as follows: the method is characterized in that the temperature after the tank is set, the temperature after the tank is monitored, the action of a cooling system is determined according to the actual temperature after the tank and the set temperature after the tank, and then the temperature after the tank is regulated.
Disclosure of Invention
In view of the above problems in the prior art, embodiments of the present application provide a control method and a control system capable of implementing stable control of an operation temperature of an electrolytic cell.
The method for controlling the running temperature of the electrolytic tank provided by the embodiment of the application comprises the following steps:
acquiring the actual pre-tank temperature and the actual post-tank temperature of the electrolytic tank acquired by the data acquisition component;
if the difference value between the actual pre-tank temperature and the preset pre-tank temperature is within a preset range, regulating the flow rate and/or the temperature of the refrigerant to control the 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 pre-tank temperature after iteration based on the acquired actual post-tank temperature, the preset post-tank temperature, the correction coefficient and the set pre-tank temperature in the previous iteration period, and adjusting the opening of the controller of the refrigerant based on the set pre-tank temperature after iteration.
In some embodiments of the application, the time of the iterative cycle is not less than the time of the electrolyte flowing out from the front of the cell into the cell.
In some embodiments of the application, the correction factor is used to control the rate of adjustment of the temperature of the electrolyzer, the correction factor being no less than 0.
In some embodiments of the application, the data acquisition device employs a temperature sensor and is respectively mounted to the electrolyte inlet and outlet of the electrolytic cell, and the data acquisition device is configured to send a temperature signal to a control unit.
In some embodiments of the application, the control unit comprises at least a PLC, a safety barrier, a relay and an electrical converter electrically connected.
In some embodiments of the application, the heat exchange unit of the electrolyzer employs a heat exchanger.
In some embodiments of the application, the coolant uses industrial cooling water to cool the electrolyte.
In some embodiments of the application, the controller of the refrigerant is used for continuously adjusting the refrigerant flow.
The embodiment of the application also provides a control system for the running temperature of the electrolytic tank, which comprises the following steps:
a data acquisition unit 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 refrigerant controller when the difference value between the actual pre-tank temperature and the preset pre-tank temperature is within a preset range so as to adjust the refrigerant flow and/or the temperature to control the electrolyte inlet temperature, and determining the opening of the refrigerant controller based on the actual pre-tank temperature and the preset pre-tank temperature in the current iteration period; and when the subsequent iteration period of the current iteration period starts, determining the post-iteration pre-set temperature based on the acquired actual post-slot temperature, the pre-set post-slot temperature, the correction coefficient and the pre-set pre-slot temperature in the previous iteration period, and sending an opening degree adjusting instruction to a refrigerant controller based on the post-iteration pre-set temperature.
In some embodiments of the application, the data acquisition device employs a temperature sensor and is respectively mounted to the electrolyte inlet and 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 application, 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 method and the system for controlling the running temperature of the electrolytic tank provided by the embodiment of the application have the beneficial effects that: the control precision and the sensitivity of the running temperature of the electrolytic tank can be improved, the great fluctuation of the temperature of the electrolytic tank is avoided, and the running safety and stability of the electrolytic tank are improved. Further, since the temperature of the electrolytic tank is relatively stable, the operation temperature of the electrolytic tank 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 application;
FIG. 2 is a graph showing a comparison of a temperature curve of an electrolytic cell according to an embodiment of the present application and an operating temperature curve of an electrolytic cell according to the prior art;
FIG. 3 is a graph showing the comparison of the total voltage applied to an electrolytic cell and the total voltage applied to the electrolytic cell in the prior art.
Reference numerals
1. An electrolytic cell; 2. a post-tank temperature monitoring point; 3. the heat exchange unit is 4, electrolyte, 5 and a tank front temperature monitoring point; 6. and a refrigerant flow controller 7, refrigerant.
Detailed Description
The present application will be described in detail below with reference to the drawings and detailed description to enable those skilled in the art to better understand the technical scheme of the present application.
Various aspects and features of the present application are described herein with reference to the accompanying drawings.
These and other characteristics of the application will become apparent from the following description of a preferred form of embodiment, given as a non-limiting example, with reference to the accompanying drawings.
It is also to be understood that, although the application has been described with reference to some specific examples, a person skilled in the art will certainly be able to achieve many other equivalent forms of the 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 light of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application will be 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 constructions are not described in detail to avoid obscuring the application in unnecessary or unnecessary detail from historical operations of the user. Therefore, specific structural and functional details disclosed herein are not intended to be 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 word "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 application provides a control method for the running temperature of an electrolytic tank, which can be applied to the electrolytic tank 1 with a data acquisition component, a control unit and a corresponding execution component, specifically can automatically monitor the temperature of the electrolytic tank 1 through the data acquisition component (can be a temperature acquisition device) and transmit monitoring data to the control unit, the control unit executes tank temperature control logic based on the received monitoring data and controls the action of the execution component, 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, and the method specifically comprises the following steps:
acquiring the actual pre-tank temperature and the actual post-tank temperature of the electrolytic tank 1 acquired by the data acquisition component;
if the difference value between the actual pre-tank temperature and the preset pre-tank temperature is within a preset range, the flow and/or the temperature of the refrigerant 7 are/is regulated to control the liquid inlet temperature of the electrolyte 4; specifically, in the actual operation process, since the cooling water film regulating valve adopts PID control, when the temperature before the actual tank has not reached the set value, the film regulating valve actually starts to act, for example, the set temperature is 90 ℃, the actual temperature is near 85 ℃, the opening of the film regulating valve is gradually increased from 0, that is, the PID regulation is advanced, and then 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 before the preset tank is smaller than 10 degrees, the flow and/or the temperature of the refrigerant 7 are regulated to control the inlet temperature of the electrolyte 4.
Wherein, in the current iteration period, determining and adjusting the opening of the controller of the refrigerant 7 based on the actual pre-tank temperature and the preset pre-tank temperature; in this embodiment, when the temperature of the electrolyte needs to be reduced or increased, the cooling water flow is generally increased or decreased by adjusting the opening of the film adjusting valve, and in addition, the temperature of the refrigerant may be adjusted, or the heat exchange area may be adjusted (for example, only one heat exchanger is started at first, and one heat exchanger is started when the heat exchange needs to be increased), or the heat exchange coefficient may be adjusted (for increasing the electrolyte flow), or other heat exchange modes, such as air cooling, may be started to adjust the temperature of the electrolyte.
And when the subsequent iteration period of the current iteration period starts, determining the post-iteration set pre-groove temperature based on the acquired actual post-groove temperature, the pre-groove temperature, the correction coefficient and the pre-set pre-groove temperature in the previous iteration period, and adjusting the opening of the controller of the refrigerant 7 based on the post-iteration set pre-groove temperature.
In the above embodiment, the difference between the actual pre-tank temperature and the preset pre-tank temperature may be within a preset temperature range, and the absolute value of the difference between the actual pre-tank temperature and the preset pre-tank temperature may be within a preset temperature range, where the preset temperature range may be selected from 0-10 degrees, or may be set from 0-100 degrees, which is not limited herein. As an example, if the preset pre-tank temperature is set to 90 degrees, and the control method is intended to perform the iterative process at the beginning, when the electrolytic tank starts to operate, the actual pre-tank temperature may be set to normal temperature, for example, 25 degrees, and it is known that the set temperature range is 0-65 degrees at this time, however, if the control method starts to perform the iterative process when the actual pre-tank temperature is normal temperature, the iterative process is longer in calculation, and in the process that the actual pre-tank temperature reaches the preset pre-tank temperature, the iterative process is already performed for multiple times, and the obtained calculated value has limited beneficial effects on the actual temperature control of the electrolytic tank; through multiple tests, it is finally determined that better control effect can be obtained by performing operation temperature control when the actual pre-tank temperature is close to the preset pre-tank temperature, and unnecessary iterative processing calculation in the early stage can be reduced, so that, as a preference, the difference between the actual pre-tank temperature and the preset pre-tank temperature can be set to be within a preset range of-10 degrees to 10 degrees, namely, the set temperature range is 0-10 degrees.
As can be seen from the above technical solutions, the control method provided in the above embodiment of the present application specifically adopts a periodic iterative mode, and the specific control logic is: the pre-tank temperature and the post-tank temperature of the electrolytic tank 1 are set to be the preset pre-tank temperature and the preset post-tank temperature in advance, and can be respectively marked as the pre-tank temperature and the post-tank temperature, so that the control unit can control the opening degree of the refrigerant flow controller 6 by comparing the actual pre-tank temperature with the preset pre-tank temperature in the current iteration period by acquiring the actual pre-tank temperature (pre-tank) and the actual post-tank temperature (post-tank) which are automatically monitored and acquired through the data acquisition device, and iterate the pre-tank temperature according to the subtraction operation logic after the difference between the actual post-tank temperature (post-tank) and the preset post-tank temperature (post-tank) is multiplied by the correction coefficient alpha in the beginning of the next iteration period S, so as to obtain the post-iteration set pre-tank temperature (can be marked as the pre-tank'), namely,
pre-T' =pre-T- α· (post-T post),
then, in the iteration period, the control unit controls the action of the execution component (controlling the refrigerant flow controller 6) by comparing the actual temperature before the tank (before T) with the set temperature before the tank (before T') after the iteration, thereby adjusting the flow or the temperature of the refrigerant 7, further adjusting the liquid inlet temperature of the electrolyte 4, realizing the stable control of the running temperature of the electrolytic tank, and continuing to repeat the steps when the next iteration period starts, namely, continuously iterating.
In some embodiments of the present application, the correction coefficient is used to control the speed of adjusting the temperature of the electrolytic tank 1, and the correction coefficient is not less than 0, and may be specifically set according to the actual speed of adjusting the temperature of the electrolytic tank 1.
Further, in this embodiment, the data acquisition device adopts a temperature sensor, and the temperature sensor may adopt a platinum resistor as an example, and is respectively installed at an inlet and an outlet of the electrolyte 4 of the electrolytic tank 1, where the outlet includes a hydrogen outlet and an oxygen outlet, and the data acquisition device is used to send a temperature signal to the control unit, where the temperature signal may be a 4-20 milliamp signal as an example, and of course, the temperature signal may also be sent with a voltage signal of 0-5V, or a photoelectric signal, a network transmission signal, or the like. In addition, in the embodiment, the temperature measurement can be realized by adopting a mode of installing a temperature measuring device outside the pipeline, and in addition, the acquisition of temperature signals can be realized by adopting an infrared temperature measuring gun.
Meanwhile, in this embodiment, the control unit at least includes a PLC, a safety barrier, a relay, and an electrical converter that are electrically connected, where 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 tank 1 adopts a heat exchanger, which may be a tube-type heat exchanger as an example, where 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 is 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 be a floating head type heat exchanger, a plate type heat exchanger, etc., which are not limited specifically herein, and the refrigerant 7 may be any of chilled water, ethanol, and kerosene.
In addition, in this embodiment, the controller of the refrigerant 7 is configured to continuously adjust the flow of the refrigerant 7, so as to adjust the temperature of the electrolyte 4, and the controller may be a film adjusting valve, for example.
According to the embodiment, the control precision and the sensitivity of the running temperature of the electrolytic tank can be improved, the great fluctuation of the temperature of the electrolytic tank is avoided, and the running safety and the running stability of the electrolytic tank 1 are improved. Further, since the temperature of the electrolytic tank 1 is relatively stable, the operation temperature of the electrolytic tank 1 can be appropriately increased, and the energy consumption in the electrolytic process can be reduced.
For the sake of understanding the above technical solution, as an example, a preset pre-tank temperature (tsupped) =75 ℃ and a preset post-tank temperature (tsupped) =90 ℃ set by a user, and an iteration cycle s=120S, and a correction coefficient α=1 are specifically described as an example:
when the electrolysis equipment is just started, the control unit collects the actual pre-tank temperature (before T) at the pre-tank temperature monitoring point 55 and collects the actual post-tank temperature (after T) at the post-tank temperature monitoring point 22 through the data collecting component, and at the moment, the refrigerant flow controller 6 is arranged before T and does not act.
Along with the extension of the running time, the temperature before the actual tank (before T) and the temperature after the actual tank (after T) are gradually increased, when the temperature is less than or equal to 10 ℃ and is preset before the temperature is |T-T, 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 temperature is set to be equal to 75 ℃, and the control unit controls the opening of the refrigerant flow controller 6 by comparing the preset temperature with the preset temperature, so as to adjust the gradual convergence of the preset temperature to the preset temperature.
When the iteration period s=120 seconds, where s=120 seconds is an example value, in the actual operation process, the electrolyte may be different from 2 minutes to 20 minutes from entering the electrolytic tank 1 to exiting the electrolytic tank 1, and if the iteration period is 10 minutes, but the iteration period is 120 seconds (2 minutes), then the temperature before the tank 1 reacts with the temperature after the tank is accumulated for 5 iterations, for example, 5 times are added to the temperature before the tank is set at 5 ℃ in the case, and the temperature before the tank is set at 100 ℃, which is unreasonable, so that the iteration period is important, and then the upper limit and the lower limit of the temperature before the tank is set in the actual application process.
In some embodiments of the application, the time of the iterative cycle is not less than the time of the electrolyte 4 flowing out from the front of the cell into the cell of the electrolytic cell 1.
And carrying out iteration in the front of T, wherein the iteration algorithm is as follows:
t front set' =t front set- (T rear-T rear set) ×1,
that is, the post-iteration set pre-tank temperature is Tpresets', assuming here that three cases illustrate the operating logic of the control method:
1. setting after T < after T, assuming that after T=85 ℃, setting before T' =75- (85-90) ×1=80 ℃, at this time, setting after iteration to raise the temperature before the tank, the control unit controls the opening degree of the refrigerant flow controller 6 to be smaller, so that the liquid inlet temperature of the electrolyte 4, namely the temperature before the actual tank (before T), is raised, and the temperature of the electrolyte 4 at the outlet of the electrolytic tank 1, namely the temperature after the actual tank (after T), is raised, and approaching to after T;
2. after T=after T, then' before T=75- (90-90) ×1=75 ℃, at this time, the temperature before the iterative set tank is unchanged, the opening of the refrigerant flow controller 6 is controlled by the control unit to be unchanged, the temperature before the actual tank (before T) and the temperature after the actual tank (after T) are unchanged, and the system temperature is stable to operate;
3. the post-T > post-T setting is performed, and assuming that post-t=95 ℃, the pre-T setting is performed' =75- (95-90) ×1=70 ℃, at this time, the temperature before the iterative setting tank is reduced, and the control unit controls the opening degree of the refrigerant flow controller 6 to be increased, so that the inlet temperature of the electrolyte 4, that is, the temperature before the actual tank (before the post-T) is reduced, and the temperature of the electrolyte 4 at the outlet of the electrolyte tank 1, that is, the temperature after the actual tank (after the post-T) is reduced, and the temperature is set close to the post-T.
After the next iteration period is reached, the iteration is continued by the preset T, and the control unit controls the opening change of the refrigerant flow controller 6 according to the operation logic to control the operation state of the electrolytic tank 1. After a plurality of iteration cycles, the actual post-tank temperature (post-T) of the electrolytic tank 1 tends to the preset post-tank temperature (post-T), so that the stable control of the running temperature of the electrolytic tank is realized.
The embodiment of the application also provides a control unit for the running temperature of the electrolytic tank, which comprises:
a data acquisition means for acquiring an actual pre-bath temperature and an actual post-bath temperature of the electrolytic bath 1;
the control unit is used for sending a control signal to the controller of the refrigerant 7 when the difference value between the actual pre-tank temperature and the preset pre-tank temperature is within a preset range so as to adjust the flow rate and/or the temperature of the refrigerant 7 to control the liquid inlet temperature of the electrolyte 4, and determining and adjusting the opening of the controller of the refrigerant 7 based on the actual pre-tank temperature and the preset pre-tank temperature in the current iteration period; and when the subsequent iteration period of the current iteration period starts, determining the post-iteration pre-set temperature based on the acquired actual post-slot temperature, the pre-set post-slot temperature, the correction coefficient and the pre-set pre-slot temperature in the previous iteration period, and sending an opening degree adjusting instruction to a controller of the refrigerant 7 based on the post-iteration pre-set temperature.
In some embodiments of the application, the time of the iterative cycle is not less than the time of the electrolyte 4 flowing out from the front of the cell into the cell of the electrolytic cell 1.
In some embodiments of the application, the data acquisition device employs a temperature sensor, which may be a platinum resistor, for example, and is mounted at the inlet and outlet of the electrolyte 4 of the electrolytic cell 1, respectively, and is configured to send a temperature signal to the control unit, which may be a 4-20 milliamp signal, for example.
In some embodiments of the application, 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 application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this application will occur to those skilled in the art, and are intended to be within the spirit and scope of the application.
Claims (9)
1. A method for controlling the operating temperature of an electrolytic cell, comprising:
acquiring the actual pre-tank temperature and the actual post-tank temperature of the electrolytic tank acquired by the data acquisition component;
if the difference value between the actual pre-tank temperature and the preset pre-tank temperature is within a preset range, regulating the flow rate and/or the temperature of the refrigerant to control the inlet temperature of the electrolyte;
in the current iteration period, determining the opening of a controller for adjusting the refrigerant based on the actual temperature before the tank and the preset temperature before the tank, wherein the specific control logic is as follows:
the temperature before the electrolytic tank and the temperature after the electrolytic tank are preset as the temperature before the tank and the temperature after the tank are respectively marked as the temperature before the tank and the temperature after the tank, and then the control unit automatically monitors the temperature before the tank and the temperature after the tank through the data acquisition device, controls the opening degree of the refrigerant flow controller by comparing the temperature before the tank and the temperature before the tank when the current iteration period is carried out, and iterates the temperature before the tank to the temperature before the tank according to the subtraction operation logic after the difference value between the temperature after the tank and the temperature after the tank is preset is multiplied by the correction coefficient alpha when the next iteration period S is carried out, thereby obtaining the temperature before the tank after the iteration, namely,
pre-T' =pre-T- α· (post-T-post);
wherein, tfront' represents the temperature before the setting tank and Trear represents the temperature after the actual tank;
when the subsequent iteration period of the current iteration period starts, determining the post-iteration pre-set temperature based on the acquired actual post-tank temperature, the pre-set post-tank temperature, the correction coefficient and the pre-set temperature in the previous iteration period, and adjusting the opening of the controller of the refrigerant based on the post-iteration pre-set temperature
The time of the iteration period is not less than the time of the electrolyte flowing out from the front of the electrolytic tank to the rear of the electrolytic tank.
2. A method for controlling the operating temperature of an electrolytic cell according to claim 1, wherein,
the correction coefficient is used for controlling and adjusting the speed of the temperature of the electrolytic tank, and the correction coefficient is not less than 0.
3. A method for controlling the operating temperature of an electrolytic cell according to claim 2, wherein,
the data acquisition component adopts a temperature sensor and is respectively arranged at an electrolyte inlet and an electrolyte outlet of the electrolytic tank, the data acquisition device is used for sending a temperature signal to the control unit, and the control unit at least comprises a PLC, a safety barrier, a relay and an electric converter which are electrically connected.
4. A method for controlling the operating temperature of an electrolytic cell according to claim 3,
the heat exchange unit of the electrolytic tank adopts a heat exchanger.
5. A method for controlling the operating temperature of an electrolytic cell according to claim 4, wherein,
the coolant adopts industrial cooling water to cool the electrolyte.
6. A method for controlling the operating temperature of an electrolytic cell according to claim 5, wherein,
the refrigerant controller is used for continuously adjusting the refrigerant flow.
7. A control system for operating temperature of an electrolytic cell employing the method of any one of claims 1-6, comprising:
a data acquisition unit 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 refrigerant controller when the difference value between the actual pre-tank temperature and the preset pre-tank temperature is within a preset range so as to adjust the refrigerant flow and/or the temperature to control the electrolyte inlet temperature, and determining the opening of the refrigerant controller based on the actual pre-tank temperature and the preset pre-tank temperature in the current iteration period; and when the subsequent iteration period of the current iteration period starts, determining the post-iteration pre-set temperature based on the acquired actual post-slot temperature, the pre-set post-slot temperature, the correction coefficient and the pre-set pre-slot temperature in the previous iteration period, and sending an opening degree adjusting instruction to a refrigerant controller based on the post-iteration pre-set temperature.
8. A control system for operating temperature of an electrolytic cell according to claim 7,
the data acquisition component adopts a temperature sensor and is respectively arranged at an electrolyte inlet and an electrolyte outlet of the electrolytic tank, and the data acquisition device is used for sending a temperature signal to the control unit.
9. A control system for operating temperature of an electrolytic cell according to claim 8,
the control unit at least comprises a PLC, a safety grid, a relay and an electric converter which are electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210754191.5A CN115012000B (en) | 2022-06-28 | 2022-06-28 | Control method and control system for running temperature of electrolytic tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210754191.5A CN115012000B (en) | 2022-06-28 | 2022-06-28 | Control method and control system for running temperature of electrolytic tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115012000A CN115012000A (en) | 2022-09-06 |
| CN115012000B true CN115012000B (en) | 2023-09-15 |
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| 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 |
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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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| 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 |
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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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