Heat storage and standby heat control method of alkaline electrolytic cell and related device

Abstract

The invention discloses a heat storage and standby heat control method of an alkaline electrolytic cell and a related device, and relates to the field of hydrogen production. And meanwhile, the multi-groove shared phase change heat storage and release device serves as a central heat storage unit, a cascade heat management framework of'separate-groove heat absorption-concentrated heat storage-on-demand heat release 'is formed, and the problem of real-time heat source dependence is solved. And the plurality of shared alkali liquor boxes are communicated through a third alkali liquor conveying pipeline, and are matched with a fourth alkali liquor conveying pipeline which can supply liquor to the plurality of electrolytic cells by each shared alkali liquor box, so that a networked heating medium distribution system is constructed. According to the design, waste heat of any working electrolytic cell is allowed to be stored in any shared alkali liquor box, any shared alkali liquor box can provide alkali liquor for any shut-down electrolytic cell, and space-time flexible scheduling of heat is achieved. The temperature control module integrates three working modes of heat storage, heat release and mixing, working condition requirements are accurately matched through a controller, alkali liquor heating does not need to only depend on the current effect, and starting energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hydrogen production, and in particular to a heat storage and heat preparation control method for an alkaline electrolytic cell and a related device. BACKGROUND

[0002] Hydrogen energy, as the most promising clean energy, occupies a strategic position in global energy transformation. Alkaline water electrolysis (ALKWE) hydrogen production has become the core technology for large-scale green hydrogen production due to its low equipment cost and long service life. In the renewable energy hydrogen production scenario, multiple electrolytic cells need to be configured to operate to match the volatility of wind and solar power generation: a part of working electrolytic cells bear the basic load, and the remaining standby electrolytic cells are used to cope with power fluctuations. However, the rapid start of the standby electrolytic cells requires maintaining a high-temperature standby state of the alkali solution, such as maintaining the temperature of the alkali solution in the standby electrolytic cells at 85-95℃.

[0003] In the related art, the alkali solution in the standby electrolytic cells is heated by the current heat effect, which has very high energy consumption, greatly affecting the energy efficiency and economy of the system. SUMMARY

[0004] In view of the above problems, the application provides a heat storage and heat preparation control method for an alkaline electrolytic cell and a related device to achieve the purpose of reducing the energy consumption of heating the alkali solution in the standby electrolytic cells. The specific scheme is as follows:

[0005] The first aspect of the application provides a heat storage and heat preparation device for an alkaline electrolytic cell, comprising: a phase change heat storage and release device, a controller, a plurality of temperature control modules, and a plurality of shared alkali solution tanks; the temperature control module comprises a heat absorption exchange device and a heat release exchange device; each heat absorption exchange device is arranged in the phase change heat storage and release device and is used to store heat in the alkali solution into the phase change heat storage and release device, and each heat release exchange device is arranged in the phase change heat storage and release device and is used to release heat in the phase change heat storage and release device to the alkali solution;

[0006] Wherein, the first alkali solution transmission pipeline of each electrolytic cell is connected with the input end of the corresponding temperature control module; the second number of second alkali solution transmission pipelines of the output end of the temperature control module corresponding to each electrolytic cell are connected with the input ends of the plurality of shared alkali solution tanks one by one, and the second number is the total number of the plurality of shared alkali solution tanks; any two of the shared alkali solution tanks in the plurality of shared alkali solution tanks are connected through a third alkali solution transmission pipeline; the first number of fourth alkali solution transmission pipelines of each shared alkali solution tank are connected with the input ends of the first number of electrolytic cells one by one;

[0007] The input end of the temperature control module is connected with the heat absorption exchange device through a fifth lye transmission pipeline, the input end of the temperature control module is connected with the heat release exchange device through a sixth lye transmission pipeline, and the input end of the temperature control module is connected with the output end of the temperature control module through a ninth lye transmission pipeline;

[0008] Each of the first lye transmission pipeline, the second lye transmission pipeline, the third lye transmission pipeline, the fourth lye transmission pipeline, the fifth lye transmission pipeline, the sixth lye transmission pipeline and the ninth lye transmission pipeline is provided with a valve and a circulating pump;

[0009] The working modes of the temperature control module include a first working mode, a second working mode and a third working mode;

[0010] The first working mode is that the valve on the fifth lye transmission pipeline of the output end of the temperature control module is in an open state, the heat absorption exchange device is in a working state, and the valves on the other lye transmission pipelines of the output end of the temperature control module are in a closed state;

[0011] The second working mode is that the valve on the sixth lye transmission pipeline of the output end of the temperature control module is in an open state, the heat release exchange device is in a working state, and the valves on the other lye transmission pipelines of the output end of the temperature control module are in a closed state;

[0012] The third working mode is that the valve on the ninth lye pipeline of the output end of the temperature control module is in an open state, and the valves on the other lye transmission pipelines of the output end of the temperature control module are in a closed state;

[0013] A controller is configured to control the opening and closing of each valve and the switching between the working modes of the temperature control module corresponding to each electrolytic cell.

[0014] In a possible implementation, the temperature control module further includes a lye cooler.

[0015] The input end of the temperature control module is connected with the input end of the lye cooler through a seventh lye transmission pipeline, and the seventh lye transmission pipeline is provided with a valve and a circulating pump.

[0016] The temperature control module further includes a fourth working mode, in which the valve on the seventh lye pipeline of the output end of the temperature control module is in an open state, the lye cooler is in a working state, and the valves on the other lye transmission pipelines of the output end of the temperature control module are in a closed state.

[0017] In a possible implementation, the temperature control module further comprises a lye heater;

[0018] The input end of the temperature control module is connected with the input end of the lye heater through an eighth lye transmission pipeline; a valve and a circulating pump are arranged on the eighth lye transmission pipeline;

[0019] The temperature control module further comprises a fifth working mode, in which the valve on the sixth lye pipeline of the output end of the temperature control module is in an open state, the heat release exchange device is in a working state, the valve on the eighth lye pipeline is in an open state, the lye heater is in a working state, and the valves on the other lye transmission pipelines of the output end of the temperature control module are in closed states.

[0020] In a possible implementation, a hydrogen-oxygen separation and purification device is arranged on the first lye transmission pipeline of each electrolytic cell.

[0021] The second aspect of the present application provides a heat storage and standby heating control method of an alkaline electrolytic cell, which is applied to the controller in the heat storage and standby heating device of the alkaline electrolytic cell as described in the first aspect, and the heat storage and standby heating control method of the alkaline electrolytic cell comprises the following steps of:

[0022] If the temperature of the phase change heat storage and release device is less than or equal to a preset temperature threshold, the temperature control module corresponding to the working electrolytic cell in a working state is switched to the first working mode;

[0023] If the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, the valve on the first lye transmission pipeline of the shutdown electrolytic cell is controlled to be in an open state, the temperature control device corresponding to the shutdown electrolytic cell and the working electrolytic cell is controlled to be in the third working mode, at least one second shared lye tank in the plurality of shared lye tanks is controlled to be in a working state, the valve on the third lye output pipeline between the first shared lye tank and the second shared lye tank is controlled to be in an open state, and the circulating pump on the third lye output pipeline between the first shared lye tank and the second shared lye tank is controlled to circulate the lye in the first shared lye tank and the second shared lye tank at a target speed; the target speed makes the temperature of the lye in the first shared lye tank be in a preset temperature range; the second shared lye tank in a working state means that the valve on the fourth lye transmission pipeline connecting the second shared lye tank with the shutdown electrolytic cell is in an open state and the valve on the second lye transmission pipeline connecting the temperature control module corresponding to the shutdown electrolytic cell with the second shared lye tank is in an open state;

[0024] If it is detected that the operation of starting the to-be-started electrolytic cell in the plurality of stopped electrolytic cells is started, and the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the alkali liquor in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, and the volume of the alkali liquor in the first shared alkali liquor tank meets the requirement of alkali liquor required by the to-be-started electrolytic cell and the working electrolytic cell, the valve on the fourth alkali liquor transmission pipeline connecting the first shared alkali liquor tank and the to-be-started electrolytic cell is controlled to be in an open state.

[0025] If it is detected that the operation of starting the to-be-started electrolytic cell in the plurality of stopped electrolytic cells is started, and the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the alkali liquor in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, and the volume of the alkali liquor in the first shared alkali liquor tank does not meet the requirement of alkali liquor required by the stopped electrolytic cell and the working electrolytic cell, and the temperature of the alkali liquor in the first shared alkali liquor tank is higher than the minimum value of the preset temperature range and the difference between the temperature of the alkali liquor in the first shared alkali liquor tank and the minimum value is less than or equal to a first threshold, the temperature control modules corresponding to the stopped electrolytic cell and the to-be-started electrolytic cell are controlled to switch to the second working mode.

[0026] In a possible implementation, the temperature control module further comprises an alkali liquor cooler; wherein the input end of the temperature control module is connected with the input end of the alkali liquor cooler through a seventh alkali liquor transmission pipeline; a valve and a circulating pump are arranged on the seventh alkali liquor transmission pipeline; the temperature control module further comprises a fourth working mode, in which the valve on the seventh alkali liquor pipeline of the output end of the temperature control module is in an open state, the alkali liquor cooler is in a working state, and the valves on other alkali liquor transmission pipelines of the output end of the temperature control module are in a closed state, and further comprising:

[0027] If it is detected that the operation of starting the to-be-started electrolytic cell in the plurality of stopped electrolytic cells is started, and the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the alkali liquor in the plurality of shared electrolytic cells belongs to the preset temperature range, the temperature control modules corresponding to the to-be-started electrolytic cell and the working electrolytic cell are controlled to switch to the fourth working mode.

[0028] If it is detected that the operation of starting the to-be-started electrolytic cell in the plurality of stopped electrolytic cells is started, and the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the alkali liquor in the plurality of shared electrolytic cells belongs to the preset temperature range, the temperature control modules corresponding to the to-be-started electrolytic cell and the working electrolytic cell are controlled to switch to the fourth working mode.

[0029] In a possible implementation, the method further includes:

[0030] If all electrolytic cells are in the working state, and the temperature of the alkali solution in the plurality of shared alkali solution tanks all belongs to the preset temperature range, the temperature control module corresponding to all electrolytic cells is controlled to switch to the fourth working mode.

[0031] In a possible implementation, the temperature control module further includes an alkali solution heater; the input end of the temperature control module is connected with the input end of the alkali solution heater through an eighth alkali solution transmission pipeline; a valve and a circulating pump are arranged on the eighth alkali solution transmission pipeline; the temperature control module further includes a fifth working mode, in which the valve on the sixth alkali solution pipeline of the output end of the temperature control module is in an open state, the heat release exchange device is in a working state, the valve on the eighth alkali solution pipeline is in an open state, the alkali solution heater is in a working state, and the valves on the other alkali solution transmission pipelines of the output end of the temperature control module are in a closed state; the method further includes:

[0032] If it is detected that the operation of starting an electrolytic cell to be started in the plurality of shutdown electrolytic cells is started, the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, the temperature of the alkali solution in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, and the volume of the alkali solution in the first shared alkali solution tank meets the requirement of the alkali solution required by the electrolytic cell to be started and the working electrolytic cell, the heating alkali solution speed is determined;

[0033] If the heating alkali solution speed is greater than the first preset speed, the temperature control module corresponding to the shutdown electrolytic cell and the electrolytic cell to be started is controlled to switch to the fifth working mode;

[0034] If the heating alkali solution speed is less than or equal to the first preset speed, the temperature control module corresponding to the shutdown electrolytic cell and the electrolytic cell to be started is controlled to switch to the second working mode.

[0035] The third aspect of the present application provides a heat storage and heating control device of an alkaline electrolytic cell, which is applied to the controller in the heat storage and heating device of the alkaline electrolytic cell as described in the first aspect, and the heat storage and heating control device of the alkaline electrolytic cell includes:

[0036] The first control module is configured to control the temperature control module corresponding to the working electrolytic cell in the working state to switch to the first working mode if the temperature of the phase change heat storage and release device is less than or equal to the preset temperature threshold.

[0037] the second control module is configured to, if the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, control a valve on a first caustic lye delivery pipeline of a shutdown electrolytic cell to be in an open state, control the temperature control devices corresponding to the shutdown electrolytic cell and the working electrolytic cell to be in the third working mode, control at least one second shared caustic lye tank of the plurality of shared caustic lye tanks to be in a working state, control a valve on a third caustic lye output pipeline between the first shared caustic lye tank and the second shared caustic lye tank to be in an open state, and control a circulating pump on the third caustic lye output pipeline between the first shared caustic lye tank and the second shared caustic lye tank to circulate caustic lye in the first shared caustic lye tank and the second shared caustic lye tank at a target speed; the target speed is such that the temperature of the caustic lye in the first shared caustic lye tank is within a preset temperature range; the second shared caustic lye tank in the working state means that a valve on a fourth caustic lye transmission pipeline connecting the second shared caustic lye tank and the shutdown electrolytic cell is in an open state and a valve on a second caustic lye delivery pipeline connecting the temperature control module corresponding to the shutdown electrolytic cell and the second shared caustic lye tank is in an open state.

[0038] The third control module is configured to, if it is detected that an operation of starting a to-be-started electrolytic cell of the plurality of shutdown electrolytic cells is performed, the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, the temperature of the caustic lye in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, and the volume of the caustic lye in the first shared caustic lye tank meets the requirement of caustic lye required by the to-be-started electrolytic cell and the working electrolytic cell, control a valve on a fourth caustic lye transmission pipeline connecting the first shared caustic lye tank and the to-be-started electrolytic cell to be in an open state.

[0039] The fourth control module is configured to, if it is detected that an operation of starting a to-be-started electrolytic cell of the plurality of shutdown electrolytic cells is performed, the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, the temperature of the caustic lye in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, the volume of the caustic lye in the first shared caustic lye tank does not meet the requirement of caustic lye required by the shutdown electrolytic cell and the working electrolytic cell, the temperature of the caustic lye in the first shared caustic lye tank is higher than the minimum value of the preset temperature range, and the difference between the temperature of the caustic lye in the first shared caustic lye tank and the minimum value is less than or equal to a first threshold, control the temperature control modules corresponding to the shutdown electrolytic cell and the to-be-started electrolytic cell to switch to the second working mode.

[0040] The fourth aspect of the present application provides a computer program product, comprising computer readable instructions, when the computer readable instructions run on an electronic device, the electronic device implements the heat storage and heat preparation control method of the alkaline electrolytic cell of the second aspect or any implementation manner of the second aspect.

[0041] The fifth aspect of the present application provides an electronic device comprising at least one processor and a memory connected to the processor, wherein:

[0042] The memory is configured to store a computer program;

[0043] The processor is configured to execute the computer program, so that the electronic device can implement the heat storage and standby heating control method of the alkaline electrolytic cell of the second aspect or any implementation manner of the second aspect.

[0044] The sixth aspect of the present application provides a computer storage medium, the storage medium carries one or more computer programs, when the one or more computer programs are executed by an electronic device, the electronic device can implement the heat storage and standby heating control method of the alkaline electrolytic cell of the second aspect or any implementation manner of the second aspect.

[0045] By the above technical solution, the present application provides a heat storage and standby heating device for an alkaline electrolytic cell, an independent heat absorption exchange device is arranged for each electrolytic cell, precise waste heat recovery at the slot level can be realized, and heat loss and transmission delay of centralized heat storage are avoided; at the same time, the phase change heat storage and release device shared by multiple electrolytic cells serves as a central heat storage unit, forming a hierarchical heat management architecture, i.e. a heat storage design across time scales, of “slot heat absorption-centralized heat storage-on-demand heat release”, solving the problem of real-time heat source dependence. The multiple shared caustic soda tanks are connected through third caustic soda transmission pipelines, and each shared caustic soda tank can provide caustic soda to multiple electrolytic cells through the fourth caustic soda transmission pipeline, thereby constructing a networked heat medium distribution system. This design allows the heat of caustic soda of any working electrolytic cell to be stored in the phase change heat storage and release device, and caustic soda can also be provided from any shared caustic soda tank to any shutdown electrolytic cell, thereby completely breaking the rigid constraint of traditional one-to-one heat coupling and achieving the purpose of flexible scheduling of heat in the time and space dimensions. The temperature control module integrates three working modes, i.e. a first working mode, a second working mode and a third working mode, and the valve state can be automatically switched by a controller, so that the heat demand of the electrolytic cell under different working conditions can be accurately matched. In the first working mode, the phase change heat storage and release device stores the heat in the caustic soda, in the second working mode, the phase change heat storage and release device heats the caustic soda, and in the third working mode, high-temperature caustic soda and low-temperature caustic soda can be mixed, so that the heating of caustic soda does not need to rely on current effect only, the energy consumption for heating caustic soda in the shutdown electrolytic cell is reduced, the preheating time of the shutdown electrolytic cell starting from room temperature is shortened, and the safety and stability of system operation are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0046] The above and other features, advantages, and aspects of the embodiments of the present disclosure will become more apparent by describing in detail the embodiments thereof with reference to the attached drawings. Throughout the drawings, the same or similar reference numerals refer to the same or similar elements. It should be understood that the drawings are schematic, and the original and elements are not necessarily drawn according to the scale.

[0047] Figure 1 A schematic diagram of an implementation of a heat storage and preparation device of an alkaline electrolyzer provided for an embodiment of the present application;

[0048] Figure 2 A schematic diagram of an implementation of a temperature control module provided for an embodiment of the present application;

[0049] Figure 3 A schematic diagram of a temperature control module in a first working mode provided for an embodiment of the present application;

[0050] Figure 4 A schematic diagram of a temperature control module in a second working mode provided for an embodiment of the present application;

[0051] Figure 5 A schematic diagram of a temperature control module in a third working mode provided for an embodiment of the present application;

[0052] Figure 6 A schematic diagram of a temperature control module in a fourth working mode provided for an embodiment of the present application;

[0053] Figure 7 A schematic diagram of a temperature control module in a fifth working mode provided for an embodiment of the present application;

[0054] Figure 8 A flowchart of a heat storage and preparation control method of an alkaline electrolyzer provided for an embodiment of the present application;

[0055] Figure 9 A schematic diagram of an implementation of a heat storage and preparation device of an alkaline electrolyzer corresponding to step S802 provided for an embodiment of the present application;

[0056] Figure 10 A schematic diagram of an implementation of a heat storage and preparation device of an alkaline electrolyzer corresponding to step S803 provided for an embodiment of the present application;

[0057] Figure 11 A schematic diagram of an implementation of a heat storage and preparation device of an alkaline electrolyzer corresponding to step S804 provided for an embodiment of the present application;

[0058] Figure 12 A structural schematic diagram of a heat storage and preparation control device of an alkaline electrolyzer provided for an embodiment of the present application;

[0059] Figure 13 A structural schematic diagram of an electronic device provided for an embodiment of the present application. DETAILED DESCRIPTION

[0060] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The terms used in the embodiment part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0061] The embodiments of the present application will be described below in conjunction with the drawings. It is known to those skilled in the art that as technology develops and new scenarios appear, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0062] The terms "first", "second", and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is only a distinguishing way used in the description of the embodiments of the present application to describe the objects with the same attributes. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, so that the processes, methods, systems, products or equipment containing a series of units are not necessarily limited to those units, but can include other units not clearly listed or inherent to these processes, methods, products or equipment.

[0063] Hydrogen energy, as a clean energy with development potential, occupies a strategic position in global energy transformation. Alkaline water electrolysis (ALKWE) hydrogen production has become the core technology for large-scale green hydrogen production due to its low equipment cost and long service life. In the renewable energy hydrogen production scenario, to match the volatility of wind and solar power generation, multiple electrolyzers need to be configured for operation: some electrolyzers bear the basic load, and the remaining standby electrolyzers are shut down to cope with power fluctuations. However, the rapid start of the standby electrolyzers requires maintaining a high-temperature standby state (85-95℃), and only relying on the current heating effect, the cold start time is as long as 1h, and the energy consumption of the related technology for heating the alkali solution in the standby electrolyzers is significantly high, greatly affecting the energy efficiency and economy of the system.

[0064] The heating method for the alkali solution in the standby electrolyzer in the related art is as follows.

[0065] The real-time waste heat of the working electrolyzer is transferred to the standby electrolyzer through the cooling liquid pipeline. This scheme highly depends on the continuous operation of the working electrolyzer, and once the working electrolyzer is shut down, although the system has a short thermal inertia (<30 minutes), the standby electrolyzer will quickly lose heat (cooling rate >2℃ / min) due to the lack of a continuous heat source; and an independent heat exchanger and multiple sets of switching valves need to be configured, which significantly increases the system complexity and operation and maintenance cost.

[0066] Based on this, the present application proposes a heat storage and heating device for an alkaline electrolyzer. The following will be described in detail.

[0067] As shown in Figure 1 FIG. 1 is a schematic diagram of an implementation of a heat storage and heating device for an alkaline electrolyzer provided by an embodiment of the present application.

[0068] The heat storage and heating device for the alkaline electrolyzer comprises a phase change heat storage and release device 100, a controller, a plurality of temperature control modules 200, and a plurality of shared caustic soda tanks 300.

[0069] Each temperature control module 200 comprises a heat absorption exchange device 201 and a heat release exchange device 202. Each heat absorption exchange device is arranged in the phase change heat storage and release device and is used to store heat in the caustic soda into the phase change heat storage and release device. Each heat release exchange device is arranged in the phase change heat storage and release device and is used to release heat in the phase change heat storage and release device to the caustic soda.

[0070] For example, the phase change heat storage and release device is a phase change material (PCM). Although the PCM has heat storage potential, it has fundamental obstacles in the integration of the electrolytic hydrogen production system. First, the conventional PCM is difficult to withstand the strong alkaline electrolyte environment and is prone to performance degradation after long-term contact. Second, there is a significant thermal resistance between the PCM and the caustic soda, which leads to a mismatch between the heat storage and heat release rates and the system requirements. Finally, some related technologies design the PCM as an independent module and fail to form a synergy with the thermal management of multiple electrolyzers, which cannot realize flexible scheduling of heat in the time and space dimensions.

[0071] In the present application, each heat absorption exchange device 201 and each heat release exchange device 202 are built into the phase change heat storage and release device and directly contact the caustic soda. The phase change heat storage and release device can not only efficiently recover the waste heat of the working electrolyzer and store it for a long time, but also accurately supply heat to the shutdown electrolyzer on demand. At the same time, it breaks through the medium compatibility and heat transfer bottleneck of the PCM and realizes direct and efficient heat coupling with the caustic soda.

[0072] For example, each heat absorption exchange device 201, each heat release exchange device 202, and the phase change heat storage and release device can be integrally packaged with a corrosion-resistant heat-conducting metal wall and an anti-aging composite PCM material, which avoids the performance degradation problem caused by indirect heat exchange between the PCM and the caustic soda, reduces the corrosion rate, and prolongs the service life of the heat storage and heating device for the alkaline electrolyzer by 3-5 years.

[0073] The structure of the temperature control module 200 will be described below.

[0074] As shown in Figure 2 FIG. 2 is a schematic diagram of an implementation of a temperature control module provided by an embodiment of the present application.

[0075] The input end 203 of each temperature control module 200 is connected with the heat absorption exchange device 201 through a fifth alkali solution transmission pipeline, the input end 203 of the temperature control module is connected with the heat release exchange device 202 through a sixth alkali solution transmission pipeline, and the input end of the temperature control module is connected with the output end 204 of the temperature control module through a ninth alkali solution transmission pipeline.

[0076] In an optional implementation, the input end 203 of each temperature control module 200 is connected with the input end of the alkali solution cooler 205 through a seventh alkali solution transmission pipeline, and a valve and a circulating pump are arranged on the seventh alkali solution transmission pipeline.

[0077] In an optional implementation, the input end 203 of each temperature control module 200 is connected with the input end of the alkali solution heater 206 through an eighth alkali solution transmission pipeline, and a valve and a circulating pump are arranged on the eighth alkali solution transmission pipeline.

[0078] It can be understood that a valve and a circulating pump are arranged on each alkali solution transmission pipeline, and the number of valves and circulating pumps arranged on each alkali solution transmission pipeline is not limited in the embodiment of the application.

[0079] Figure 2 The circulating pump is not shown in the figure, and only the valves are shown, wherein the valves arranged on the fifth alkali solution transmission pipeline, the sixth alkali solution transmission pipeline, the seventh alkali solution transmission pipeline, the eighth alkali solution transmission pipeline and the ninth alkali solution transmission pipeline are V7, V8, V9, V10 and V11 in sequence.

[0080] In an optional implementation, the temperature control module can have a ninth alkali solution transmission pipeline.

[0081] In an optional implementation, the ninth alkali solution transmission pipeline in the temperature control module can be the eighth alkali solution transmission pipeline with the alkali solution heater 206 in a non-working state, or the ninth alkali solution transmission pipeline can be the seventh alkali solution transmission pipeline with the alkali solution cooler 205 in a non-working state.

[0082] The connection relationship among the phase change heat storage and release device, the plurality of temperature control modules and the plurality of shared alkali solution tanks will be described below. Figure 1 The connection relationship among the phase change heat storage and release device, the plurality of temperature control modules and the plurality of shared alkali solution tanks will be described below.

[0083] Figure 1 The electrolytic cell 1, the electrolytic cell x, the electrolytic cell y and the electrolytic cell z are shown in the figure, and it can be understood that, Figure 1 The number of electrolytic cells is only an example and is not limited in the application. Figure 1 Two shared alkali solution tanks are shown in the figure, and it can be understood that, Figure 1For example only, the number of shared caustic soda tanks is not limited in the present application, for example, the number of shared caustic soda tanks can be 2, 3, 4, 5, etc., which can be determined based on actual conditions.

[0084] For example, the volumes of the plurality of shared caustic soda tanks can be different or the same.

[0085] In combination Figure 1 It can be seen that the first caustic soda transmission pipeline of each electrolytic cell is connected to the input end of the corresponding temperature control module.

[0086] The second number of second caustic soda transmission pipelines of the output end of the temperature control module corresponding to each electrolytic cell are connected one by one to the input end of the plurality of shared caustic soda tanks, and the second number is the total number of the plurality of shared caustic soda tanks.

[0087] Since Figure 1 In the second number is 2, so Figure 1 Each temperature control module in has two second caustic soda transmission pipelines.

[0088] Any two shared caustic soda tanks in the plurality of shared caustic soda tanks are connected through a third caustic soda transmission pipeline; the first number of fourth caustic soda transmission pipelines of each shared caustic soda tank are connected one by one to the input end of the first number of electrolytic cells. The first number is the total number of electrolytic cells.

[0089] In the first caustic soda transmission pipeline, the second caustic soda transmission pipeline, the third caustic soda transmission pipeline, the fourth caustic soda transmission pipeline, the fifth caustic soda transmission pipeline, the sixth caustic soda transmission pipeline and the ninth caustic soda transmission pipeline Each caustic soda transmission pipeline is provided with a valve and a circulating pump.

[0090] In an optional implementation, if the seventh caustic soda transmission pipeline and the eighth caustic soda transmission pipeline are included in the temperature control module, the seventh caustic soda transmission pipeline and the eighth caustic soda transmission pipeline are also provided with a valve and a circulating pump.

[0091] Figure 1 In only the circulating pump P-1 on the third caustic soda transmission pipeline is shown, and the other circulating pumps are not shown. Figure 1 In the valve on the third caustic soda transmission pipeline is V6.

[0092] It can be understood that any number of shared caustic soda tanks in the plurality of shared caustic soda tanks can be connected through the third caustic soda transmission pipeline, that is, the plurality of shared caustic soda tanks in the connected state can be regarded as a shared caustic soda tank. At least one third caustic soda transmission pipeline in the plurality of shared caustic soda tanks in the connected state is provided with a circulating pump.

[0093] It can be understood that the alkali liquor between the multiple shared alkali liquor tanks in the connected state can be mixed, and the speed of mixing can be controlled by the circulating pump, that is, the alkali liquor can be cooled or heated by mixing the alkali liquor.

[0094] Figure 1 In the embodiment, the valve on the first alkali liquor transmission pipeline corresponding to the electrolytic tank 1 is V1-1, the valves on the two second alkali liquor transmission pipelines corresponding to the electrolytic tank 1 are V2-1 and V3-1 respectively; the valve on the first alkali liquor transmission pipeline corresponding to the electrolytic tank x is V1-x, the valves on the two second alkali liquor transmission pipelines corresponding to the electrolytic tank x are V2-x and V3-x respectively; the valve on the first alkali liquor transmission pipeline corresponding to the electrolytic tank y is V1-y, the valves on the two second alkali liquor transmission pipelines corresponding to the electrolytic tank y are V2-y and V3-y respectively; the valve on the first alkali liquor transmission pipeline corresponding to the electrolytic tank z is V1-z, the valves on the two second alkali liquor transmission pipelines corresponding to the electrolytic tank z are V2-z and V3-z respectively.

[0095] Figure 1 In the embodiment, the valves on the first number of fourth alkali liquor transmission pipelines of one of the shared alkali liquor tanks are V4-1, V4-x, V4-y, and V4-z respectively, and the valves on the first number of fourth alkali liquor transmission pipelines of the other shared alkali liquor tank are V5-1, V5-x, V5-y, and V5-z respectively.

[0096] In combination Figure 3 It can be seen that the output end of the temperature control module corresponding to each electrolytic tank realizes the interconnection topology of "one electrolytic tank to multiple shared alkali liquor tanks" through multiple second alkali liquor transmission pipelines, and the shared alkali liquor tank realizes the interconnection topology of "one shared alkali liquor tank to multiple electrolytic tanks" through multiple fourth alkali liquor transmission pipelines, so that the heat storage and heating device of the alkaline electrolytic tank has a dynamic expansion capability: a newly added electrolytic tank only needs to be connected to the corresponding temperature control module and shared alkali liquor tank interface, without the need to reconstruct the heat management system.

[0097] The working mode of the temperature control module will be described below.

[0098] The working mode of the temperature control module includes a first working mode, a second working mode, and a third working mode.

[0099] In the first working mode, the valve on the fifth alkali liquor transmission pipeline of the output end of the temperature control module is in an open state, the heat absorption exchange device is in a working state, and the valves on the other alkali liquor transmission pipelines of the output end of the temperature control module are in a closed state.

[0100] As shown in Figure 3 FIG. 1 is a schematic diagram of the temperature control module in the first working mode provided by the embodiment of the present application.

[0101] In combinationFigure 4 As can be seen, in the first working mode, the heat absorption exchange device 201 is used to absorb the lye of the fifth lye transmission pipeline to the phase change heat storage and release device 100.

[0102] It can be understood that the first working mode is for the waste heat recovery scene of the working electrolytic cell.

[0103] It can be understood that when the temperature of the phase change heat storage and release device is less than or equal to the preset temperature threshold, i.e., the phase change heat storage and release device does not reach the heat storage saturation state, the temperature control module corresponding to the working electrolytic cell can be controlled to switch to the first working mode. Specifically, the high-temperature lye of the working electrolytic cell enters the temperature control module through the first lye transmission pipeline, the fifth lye transmission pipeline valve is opened, the lye is driven to flow through the heat absorption exchange device, and is directly coupled with the phase change heat storage and release device. The phase change heat storage and release device absorbs heat to change from solid to liquid, and the lye temperature drops to the preset temperature range, then enters the shared lye tank for storage through the second lye transmission pipeline, and the cycle is completed.

[0104] It can be understood that the optimal working temperature of the electrolytic cell is the preset temperature range. For example, the preset temperature range can be determined based on actual conditions, for example, the preset temperature range is [85°, 95°].

[0105] A temperature detector can be installed on the heat absorption exchange device 201, and when the temperature of the lye flowing through the fifth lye transmission pipeline belongs to the preset temperature range, the lye of the fifth lye transmission pipeline is transmitted to the shared lye tank.

[0106] The second working mode is that the valve on the sixth lye transmission pipeline of the output end of the temperature control module is in an open state, the heat release exchange device is in a working state, and the valves on the other lye transmission pipelines of the output end of the temperature control module are in a closed state.

[0107] As shown in FIG. 2, it is a schematic diagram of the temperature control module in the second working mode provided by the embodiment of the present application. Figure 4

[0108] In combination with FIG. 2, it can be seen that in the second working mode, the heat release exchange device 202 is used to heat the lye flowing through the sixth lye transmission pipeline by the heat of the phase change heat storage and release device 100. Figure 5 As an example, a temperature detector can be installed on the heat release exchange device 202, and the temperature of the lye flowing through the sixth lye transmission pipeline cannot be heated to exceed the maximum value of the preset temperature range.

[0109]

[0110] ​​It can be understood that the second working mode corresponds to the scenario of heating the alkali solution of the shutdown electrolyzer. It can be understood that when the shutdown electrolyzer starts from the cold / warm state to the preset temperature range, the alkali solution in the shutdown electrolyzer needs to be heated to maintain the working state of the shutdown electrolyzer after starting. Specifically, the low-temperature alkali solution (from the shared alkali solution tank or the shutdown electrolyzer) enters the temperature control module through the first alkali solution transmission pipeline, the sixth alkali solution transmission pipeline valve is opened, the alkali solution flows through the heat release exchange device, and the phase change heat storage releases heat in the liquid-solid phase change. The heated alkali solution returns to the shared alkali solution tank or is directly supplied to the shutdown electrolyzer, realizing precise preheating.

[0111] For example, the heating rate of the alkali solution can be determined based on actual conditions, for example, the heating rate is 2-3°C / min.

[0112] In the second working mode, the heat of the alkali solution of the electrolyzer only comes from the phase change heat storage and release device 100, greatly reducing the energy consumption of the system.

[0113] In combination with the first working mode and the second working mode, it can be known that the present application constructs a time and space scheduling mechanism of "waste heat storage (corresponding to the first working mode) - on-demand distribution (corresponding to the second working mode)", which fundamentally solves the problem of dependence on real-time heat sources in related technologies.

[0114] The third working mode is that the valve on the ninth alkali solution pipeline of the output end of the temperature control module is in an open state, and the valves on the other alkali solution transmission pipelines of the output end of the temperature control module are in a closed state.

[0115] As shown in Figure 6 , it is a schematic diagram of the temperature control module in the third working mode provided by the embodiment of the present application.

[0116] In the third working mode, the temperature control module is equivalent to an alkali solution transmission pipeline.

[0117] It can be understood that the third working mode corresponds to the application scenario of temperature fine adjustment and heat balance. Specifically: after the alkali solution enters the temperature control module through the first alkali solution transmission pipeline, the ninth alkali solution transmission pipeline valve is opened, and the low-temperature alkali solution / high-temperature alkali solution does not pass through any device and is directly output from the output end of the temperature control module. The alkali solution output from the output end of the temperature control module is mixed with the alkali solution of the shared alkali solution tank.

[0118] The phase change heat storage and release device integrates the heat absorption and release functions, and the temperature control module realizes internal bypass circulation through the ninth alkali solution transmission pipeline, without the need for external independent heat exchangers and complex pipeline switching, significantly reducing the system volume and initial investment. The present application can be deployed without changing the main structure of the electrolyzer, has strong compatibility, and is convenient for upgrading in various alkaline electrolytic water hydrogen production systems.

[0119] In an optional implementation, the temperature control module may further include an alkali cooler 205. The input terminal of the temperature control module is connected to the input terminal of the alkali cooler 205 via a seventh alkali transmission pipe. The seventh alkali transmission pipe is equipped with a valve and a circulation pump. The temperature control module also includes a fourth operating mode, in which the valve on the seventh alkali pipe at the output terminal of the temperature control module is open, the alkali cooler is in operation, and the valves on other alkali transmission pipes at the output terminal of the temperature control module are closed.

[0120] like Figure 6 The diagram shown is a schematic of a temperature control module in the fourth operating mode provided in an embodiment of this application.

[0121] Combination Figure 7 It can be seen that in the fourth working mode, the alkaline solution in the electrolytic cell is cooled by an alkaline solution cooler.

[0122] It is understood that the optimal operating temperature of the electrolytic cell is a preset temperature range. For example, the preset temperature range can be determined based on the actual situation, such as [85°, 95°].

[0123] For example, a temperature detector can be installed in the alkali cooler. The alkali cooler needs to reduce the temperature of the alkali to a preset temperature range, which cannot be lower than the minimum value of the preset temperature range, nor higher than the maximum value of the preset temperature range.

[0124] In an optional implementation, the temperature control module further includes an alkali heater 206; wherein the input end of the temperature control module is connected to the input end of the alkali heater via an eighth alkali transmission pipeline; the eighth alkali transmission pipeline is equipped with a valve and a circulation pump; the temperature control module further includes a fifth operating mode, wherein the valve on the sixth alkali pipeline at the output end of the temperature control module is in the open state, and the heat exchange device is in the operating state, and the valve on the eighth alkali pipeline is in the open state, and the alkali heater is in the operating state, and the valves on other alkali transmission pipelines at the output end of the temperature control module are in the closed state.

[0125] like Figure 7 The diagram shown is a schematic of a temperature control module in the fifth working mode provided in an embodiment of this application.

[0126] Combination Figure 8 It can be seen that in the fifth working mode, the alkaline solution in the electrolytic cell can be heated by the heat exchange device 202 and the alkaline solution heater 206, thereby increasing the heating speed of the alkaline solution.

[0127] a controller configured to control opening and closing of each of the valves and switching between the working modes of the temperature control module corresponding to each of the electrolytic cells.

[0128] The embodiment of the present application provides a heat storage and preparation device of an alkaline electrolytic cell, an independent heat absorption exchange device is arranged for each electrolytic cell, accurate waste heat recovery at a slot level can be realized, and heat loss and transmission delay of centralized heat storage are avoided; meanwhile, a phase change heat storage and release device shared by multiple electrolytic cells is used as a central heat storage unit, a hierarchical heat management architecture, i.e., a heat storage design across time scales, of "slot heat absorption-centralized heat storage-on-demand heat release" is formed, and the real-time heat source dependency problem is solved. The multiple shared caustic soda tanks are connected through third caustic soda transmission pipelines, and each shared caustic soda tank can provide caustic soda for multiple electrolytic cells through the fourth caustic soda transmission pipeline, so that a networked heat medium distribution system is constructed. The design allows the heat of caustic soda of any working electrolytic cell to be stored in the phase change heat storage and release device, and caustic soda can also be provided from any shared caustic soda tank to any shutdown electrolytic cell, so that the rigid constraint of traditional one-to-one heat coupling is completely broken, and the purpose of flexible scheduling of heat in the time and space dimensions is realized. The temperature control module integrates three working modes of the first working mode, the second working mode and the third working mode, and the valve state is automatically switched through the controller, so that the heat demand of the electrolytic cell under different working conditions can be accurately matched. In the first working mode, the phase change heat storage and release device stores the heat in the caustic soda, in the second working mode, the phase change heat storage and release device heats the caustic soda, and in the third working mode, the high-temperature caustic soda and the low-temperature caustic soda can be mixed, so that the caustic soda heating does not need to rely on the current effect only, the energy consumption of caustic soda heating in the shutdown electrolytic cell is reduced, the preheating time of the shutdown electrolytic cell starting from the room temperature state is shortened, and the safety and stability of the system operation are ensured.

[0129] In an optional implementation, a hydrogen / oxygen separator is arranged on the first caustic soda transmission pipeline of each electrolytic cell.

[0130] A hydrogen / oxygen separation and purification device is used to efficiently separate the high-temperature caustic soda (containing hydrogen or oxygen bubbles) mixed with gas and liquid at the outlet of the electrolytic cell.

[0131] The heat storage and preparation control method of the alkaline electrolytic cell applied to the controller will be described below in combination with the heat storage and preparation device of the alkaline electrolytic cell.

[0132] Refer to Figure 8 , Figure 8 The flowchart of the heat storage and preparation control method of the alkaline electrolytic cell provided by the embodiment of the present application is shown in Figure 9 The heat storage and preparation control method of the alkaline electrolytic cell provided by the embodiment of the present application can include steps S801 to S804, which will be described in detail below.

[0133] Step S801: If the temperature of the phase change heat storage and release device is less than or equal to a preset temperature threshold, the temperature control module corresponding to the working electrolytic cell in the working state is switched to the first working mode.

[0134] For example, the preset temperature threshold can be determined based on actual conditions, which is not limited in the present application.

[0135] The high-temperature alkali solution of the working electrolytic cell flows through the heat absorption exchange device 201 through the first alkali solution transmission pipeline, and the waste heat is transferred to the phase change heat storage and release device 100, at this time the phase change heat storage and release device 100 is in the energy storage state.

[0136] Step S802: If the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, the valve on the first alkali solution transmission pipeline of the shutdown electrolytic cell is in the open state, the temperature control device corresponding to the shutdown electrolytic cell and the working electrolytic cell is in the third working mode, at least one second shared alkali solution tank in the plurality of shared alkali solution tanks is in the working state, the valve on the third alkali solution output pipeline between the first shared alkali solution tank and the second shared alkali solution tank is in the open state, and the circulating pump on the third alkali solution output pipeline between the first shared alkali solution tank and the second shared alkali solution tank controls the circulation of the alkali solution in the first shared alkali solution tank and the second shared alkali solution tank at a target speed.

[0137] The target speed makes the temperature of the alkali solution in the first shared alkali solution tank within a preset temperature range; the second shared alkali solution tank in the working state means that the valve on the fourth alkali solution transmission pipeline connecting the second shared alkali solution tank and the shutdown electrolytic cell is in the open state, and the valve on the second alkali solution transmission pipeline connecting the temperature control module corresponding to the shutdown electrolytic cell and the second shared alkali solution tank is in the open state.

[0138] For example, the number of shutdown electrolytic cells mentioned in step S802 can be one or more, or all electrolytic cells except the working electrolytic cell.

[0139] It can be understood that if the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, it means that the phase change heat storage and release device is saturated, and the phase change heat storage and release device cannot absorb heat. If the operation of starting the shutdown electrolytic cell in the shutdown state is not detected at this time, the normal-temperature alkali solution in the shutdown electrolytic cell or the second shared alkali solution tank needs to be heated.

[0140] Please refer to Figure 9 A schematic diagram of an implementation of the heat storage and heating device of the alkaline electrolytic cell corresponding to step S802 provided in the embodiments of the present application.

[0141] Suppose the number of electrolytic cells is 4, and they are electrolytic cell 1, electrolytic cell x, electrolytic cell y and electrolytic cell z respectively; wherein electrolytic cell 1 and electrolytic cell x are working electrolytic cells, and electrolytic cell y and electrolytic cell z are shutdown electrolytic cells.

[0142] As shown in FIG. 1, the valves on the first alkali liquid conveying pipelines controlling electrolytic cell y and electrolytic cell z are in an open state (so the valves are not shown). The temperature control devices corresponding to electrolytic cell 1, electrolytic cell x, electrolytic cell y and electrolytic cell z are in the third working mode. The temperature control modules in the third working mode are equivalent to an alkali liquid conveying pipeline (see FIG. 2), so the temperature control modules are not shown in FIG. 1. Figure 5 Figure 9 Figure 9

[0143] The second shared alkali liquid tank is controlled to be in a working state, that is, the valves on the fourth alkali liquid conveying pipelines connecting the second shared alkali liquid tank with electrolytic cell y and electrolytic cell z are in an open state, and the valves on the second alkali liquid conveying pipelines connecting the temperature control modules corresponding to electrolytic cell y and electrolytic cell z with the second shared alkali liquid tank are in an open state (so the valves are not shown).

[0144] The valve on the third alkali liquid conveying pipeline between the first shared alkali liquid tank and the second shared alkali liquid tank is controlled to be in an open state (so the valve is not shown). Figure 9

[0145] The circulation pump P-1 on the third alkali liquid conveying pipeline between the first shared alkali liquid tank and the second shared alkali liquid tank is controlled to circulate the alkali liquid in the first shared alkali liquid tank and the second shared alkali liquid tank at a target speed.

[0146] As can be seen from FIG. 1, the high-temperature alkali liquid of electrolytic cell 1 and electrolytic cell x can be directly conveyed into the first shared alkali liquid tank, the normal-temperature alkali liquid of electrolytic cell y and electrolytic cell z can be directly conveyed into the second shared alkali liquid tank, and the alkali liquid in the first shared alkali liquid tank and the second shared alkali liquid tank is mixed at a target speed by the circulation pump P-1 to make the temperature of the alkali liquid in the first shared alkali liquid tank be in a preset temperature range, and the temperature of the alkali liquid in the second shared alkali liquid tank is increased. Figure 10

[0147] ​​​​​It is understood that the number of the at least one second shared alkali solution tank can be one or more. Assuming the at least one second shared alkali solution tank is a second shared alkali solution tank AA, during the heating process of the alkali solution in the second shared alkali solution tank AA, the temperature of the alkali solution in the second shared alkali solution tank AA will rise. If the temperature rises to a preset temperature range, a second shared alkali solution tank BB with the alkali solution at room temperature can be identified from among the multiple shared alkali solution tanks. Then, the valve on the third alkali solution transmission channel connecting the first shared alkali solution tank, the second shared alkali solution tank AA, and the second shared alkali solution tank BB is controlled to be in the open state, and the alkali solution circulation speed between the first shared alkali solution tank, the second shared alkali solution tank AA, and the second shared alkali solution tank BB is controlled by a circulation pump until the temperature of the alkali solution in all shared alkali solution tanks is within the preset temperature range.

[0148] It is understandable that during the mixing of the alkali solutions in the first and second shared alkali solution tanks, i.e., before the temperature of the alkali solution in the second shared alkali solution tank reaches the minimum value of the preset temperature range, the start-up and shutdown operation of the electrolytic cell may be detected. Alternatively, the start-up and shutdown operation of the electrolytic cell may be detected when the temperature of the alkali solution in all shared alkali solution tanks is within the preset temperature range.

[0149] Step S803: If an operation to start an electrolytic cell among multiple shutdown electrolytic cells is detected, and the temperature of the phase change heat storage and heat release device is greater than the preset temperature threshold, and the temperature of the alkali solution in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, and the volume of the alkali solution in the first shared alkali solution tank meets the alkali solution requirements of the electrolytic cell to be started and the working electrolytic cell, the valve on the fourth alkali solution transmission pipeline connected to the first shared alkali solution tank and the electrolytic cell to be started is controlled to be in the open state.

[0150] Understandably, the temperature of the alkali solution in the first shared alkali solution tank is always maintained within the preset temperature range. Since the first shared alkali solution tank can meet the alkali solution requirements of both the electrolytic cell to be started and the working electrolytic cell, the alkali solution in the first shared alkali solution tank can be directly transferred to the electrolytic cell to be started. Since step S802 has already controlled the temperature control module corresponding to the electrolytic cell to be started to be in the third working mode, this mode can be maintained here.

[0151] like Figure 9 The diagram shown is a schematic representation of one implementation of the heat storage and backup device for the alkaline electrolytic cell corresponding to step S803 in the embodiments of this application.

[0152] Combination Figure 11 If the electrolytic cell to be started is electrolytic cell y, then the valve on the fourth alkali transfer pipeline connecting the first shared alkali tank and electrolytic cell y needs to be in the open state.

[0153] Step S804: If it is detected that the operation of starting the to-be-started electrolyzer in the plurality of stopped electrolyzers is started, and the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the alkali liquor in the second shared electrolyzer is lower than the minimum value of the preset temperature range, and the volume of the alkali liquor in the first shared alkali liquor tank cannot meet the demand of the alkali liquor required by the stopped electrolyzer and the working electrolyzer, and the temperature of the alkali liquor in the first shared alkali liquor tank is higher than the minimum value of the preset temperature range, and the difference between the temperature of the alkali liquor in the first shared alkali liquor tank and the minimum value is less than or equal to the first threshold, the temperature control modules corresponding to the stopped electrolyzer and the to-be-started electrolyzer are controlled to switch to the second working mode.

[0154] It can be understood that the alkali liquor in the first shared alkali liquor tank cannot meet the demand of the to-be-started electrolyzer and the working electrolyzer. Therefore, one or more second shared alkali liquor tanks need to be controlled to be in a working state, so that the first shared alkali liquor tank meets the demand of the working electrolyzer, and the second shared alkali liquor tank meets the demand of the to-be-started electrolyzer. Since at least one second shared alkali liquor tank has been controlled to be in a working state in step S802, this step can continue to maintain.

[0155] It can be understood that if the temperature of the alkali liquor in the first shared alkali liquor tank is higher than the minimum value of the preset temperature range, and the difference between the temperature of the alkali liquor in the first shared alkali liquor tank and the minimum value is greater than the first threshold, it indicates that the temperature of the alkali liquor in the first shared alkali liquor tank is still relatively high, and the circulating speed of the circulating pump can be increased. If the temperature of the alkali liquor in the first shared alkali liquor tank is higher than the minimum value of the preset temperature range, and the difference between the temperature of the alkali liquor in the first shared alkali liquor tank and the minimum value is less than or equal to the first threshold, it indicates that the temperature in the first shared alkali liquor tank is not high enough to quickly increase the temperature in the second shared alkali liquor tank to the preset temperature range. Therefore, the temperature control modules corresponding to the stopped electrolyzer and the to-be-started electrolyzer are controlled to switch to the second working mode, so that the phase change heat storage and release device heats the alkali liquor in the stopped electrolyzer, thereby accelerating the temperature rising speed of the alkali liquor in the stopped electrolyzer.

[0156] Since the temperature control module corresponding to the working electrolyzer has been controlled to be in the first working mode in step S802, this step can continue to maintain.

[0157] As shown in Figure 9 FIG. 8 is a schematic diagram of an implementation of the heat storage and heating device of the alkaline electrolyzer corresponding to step S804 provided by the embodiment of the present application.

[0158] In combination with Figure 9If the to-be-started electrolytic cell to be started is electrolytic cell y, the temperature control module corresponding to electrolytic cell y is controlled to switch to the second working mode. Exemplarily, the temperature control modules corresponding to all the stopped electrolytic cells and the to-be-started electrolytic cell can also be controlled to switch to the second working mode. Figure 2 The control of the temperature control modules corresponding to all the stopped electrolytic cells and the to-be-started electrolytic cell to switch to the second working mode is exemplarily described.

[0159] In an optional implementation, after step S804, the following steps A1 to A2 can also be included.

[0160] Step A1: If it is detected that the operation of starting the to-be-started electrolytic cell in the plurality of stopped electrolytic cells is started, and the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the alkali liquor in the plurality of shared electrolytic cells belongs to the preset temperature range, the temperature control modules corresponding to the to-be-started electrolytic cell and the working electrolytic cell are controlled to switch to the fourth working mode.

[0161] It can be understood that, since the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the alkali liquor in the plurality of shared electrolytic cells belongs to the preset temperature range, it indicates that the temperature of the heat storage and preparation control device of the entire alkaline electrolytic cell is relatively stable, and the high-temperature alkali liquor of the working electrolytic cell and the to-be-started electrolytic cell needs to be cooled by the alkali liquor cooler 205.

[0162] It can be understood that, after the to-be-started electrolytic cell is in the working state, it is referred to as a working electrolytic cell.

[0163] Step A2: If it is not detected that the operation of starting the stopped electrolytic cell is started, and the temperature of the alkali liquor in the plurality of shared alkali liquor tanks belongs to the preset temperature range, the temperature control module corresponding to the working electrolytic cell is controlled to switch to the fourth working mode, and the valve on the first alkali liquor conveying pipeline of the stopped electrolytic cell is controlled to be in a closed state.

[0164] In an optional implementation, the following steps B1 to B3 are also included.

[0165] Exemplarily, real-time temperature-flow double-loop accurate control can be realized, and the outlet temperature of the alkali liquor is strictly controlled in the preset temperature range of ±5°C, that is, [85°C, 95°C], by a PID algorithm.

[0166] In an optional implementation, the following steps B1 to B3 are also included.

[0167] Step B1: If it is detected that the operation of the to-be-started electrolytic cell in the plurality of shutdown electrolytic cells is started, and the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the alkali liquor in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, the heating speed of the alkali liquor is determined.

[0168] For example, the heating speed of the alkali liquor can be determined based on the number of the to-be-started shutdown electrolytic cells and the current wind and light resources.

[0169] Step B2: If the heating speed of the alkali liquor is greater than the first preset speed, the temperature control modules corresponding to the shutdown electrolytic cells and the to-be-started electrolytic cells are controlled to switch to the fifth working mode.

[0170] It can be understood that in the fifth working mode, the phase change heat storage and release device and the alkali liquor heater 206 heat the alkali liquor at the same time, thereby improving the speed of heating the alkali liquor.

[0171] Step B3: If the heating speed of the alkali liquor is less than or equal to the first preset speed, the temperature control modules corresponding to the shutdown electrolytic cells and the to-be-started electrolytic cells are controlled to switch to the second working mode.

[0172] The controller in the present application can automatically switch the working mode of the temperature control modules corresponding to each electrolytic cell based on the temperature of the phase change heat storage and release device, the temperature of the alkali liquor in the shared alkali liquor tank, the number of working electrolytic cells, and the number of to-be-started electrolytic cells, thereby ensuring that the to-be-started electrolytic cells are quickly started, the system temperature is stable, and the energy utilization efficiency is maximized.

[0173] In any embodiment, the heat storage and release demand of the phase change heat storage and release device can be calculated in real time based on the number of to-be-started electrolytic cells, and the temperature stability of the alkali liquor in the first shared alkali liquor tank is prioritized.

[0174] In the embodiments of the present application, if the first shared alkali liquor tank can meet the alkali liquor demand of the to-be-started electrolytic cells and the working electrolytic cells, the priority order for heating the alkali liquor in the second shared alkali liquor tank is, in sequence: mixing the alkali liquor in the first shared alkali liquor tank and the second shared alkali liquor tank (i.e., controlling the temperature control modules corresponding to the working electrolytic cells and all shutdown electrolytic cells and to-be-started electrolytic cells to switch to the third working mode), heating by the phase change heat storage and release device (i.e., controlling the temperature control modules corresponding to all shutdown electrolytic cells and to-be-started electrolytic cells to switch to the second working mode, and the temperature control module corresponding to the working electrolytic cell to maintain the third working mode), and heating by the alkali liquor heater (i.e., controlling the temperature control modules corresponding to all shutdown electrolytic cells and to-be-started electrolytic cells to switch to the fifth working mode, and the temperature control module corresponding to the working electrolytic cell to maintain the third working mode).

[0175] In combination Figure 12It can be seen that through the design of the isolation interlayer type phase change heat storage and release device, the efficient recovery and storage of waste heat generated during the operation of the electrolytic cell are realized, and the energy utilization efficiency is significantly improved, and the waste heat recovery rate is greatly improved compared with the traditional cooling system.

[0176] Any two of the plurality of shared lye tanks in the present application have a third lye transmission channel between them, that is, any number of shared lye tanks can be connected to form a large shared lye tank. Based on this shared lye tank architecture, the heat of multiple electrolytic cells can be stored and distributed on demand, solving the limitation of the heat exchange scheme between electrolytic cells in the related art which relies on real-time heat sources, and ensuring that the shutdown electrolytic cell can still maintain a hot standby state for more than 8 hours without the heat supply of working electrolytic cells.

[0177] The present application adopts a zoned step phase change technology combined with a baffle turbulence heat transfer enhancement design to control the lye outlet temperature fluctuation within ±1℃, effectively avoiding the sealing aging and electrode corrosion problems caused by sudden temperature changes in the related art.

[0178] The combination of corrosion-resistant heat-conducting metal walls and anti-aging composite PCM materials in the present application ensures the long-term stable operation of the phase change heat storage and release device in a strong alkaline environment, reduces the corrosion rate, and prolongs the service life of the system.

[0179] The present application integrates a temperature control module that can automatically switch working modes according to the working state of the electrolytic cell to achieve optimal heat scheduling, while having a safety warning function, significantly reducing the need for manual intervention and operation and maintenance costs.

[0180] The isolation interlayer design of the phase change heat storage and release device in the present application realizes integration without changing the main structure of the electrolytic cell, has strong compatibility, and is easy to popularize and apply in various alkaline electrolytic water hydrogen production systems.

[0181] The above introduces a heat storage and standby heating method for an alkaline electrolytic cell provided by an embodiment of the present application. The following will introduce a device for executing the heat storage and standby heating method of the alkaline electrolytic cell.

[0182] Please refer to Figure 12 , Figure 12 The structure diagram of a heat storage and standby heating control device for an alkaline electrolytic cell provided by an embodiment of the present application. As Figure 13 shown, the heat storage and standby heating control device for the alkaline electrolytic cell comprises:

[0183] The first control module 1201 is configured to control the temperature control module corresponding to the working electrolytic cell in the working state to switch to the first working mode if the temperature of the phase change heat storage and release device is less than or equal to a preset temperature threshold.

[0184] the second control module 1202 is configured to, if the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, control a valve on a first caustic soda delivery pipeline of a shutdown electrolytic cell to be in an open state, control the temperature control devices corresponding to the shutdown electrolytic cell and the working electrolytic cell to be in the third working mode, control at least one second shared caustic soda tank of the plurality of shared caustic soda tanks to be in a working state, control a valve on a third caustic soda output pipeline between the first shared caustic soda tank and the second shared caustic soda tank to be in an open state, and control a circulating pump on the third caustic soda output pipeline between the first shared caustic soda tank and the second shared caustic soda tank to circulate caustic soda in the first shared caustic soda tank and the second shared caustic soda tank at a target speed; the target speed is such that the temperature of the caustic soda in the first shared caustic soda tank is within a preset temperature range; the second shared caustic soda tank in the working state means that a valve on a fourth caustic soda transmission pipeline connecting the second shared caustic soda tank and the shutdown electrolytic cell is in an open state, and a valve on a second caustic soda delivery pipeline connecting a temperature control module corresponding to the shutdown electrolytic cell and the second shared caustic soda tank is in an open state;

[0185] the third control module 1203 is configured to, if it is detected that an operation of starting a to-be-started electrolytic cell of a plurality of shutdown electrolytic cells is performed, the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, the temperature of the caustic soda in the second shared electrolytic cell is lower than a minimum value of the preset temperature range, and the volume of the caustic soda in the first shared caustic soda tank meets the requirement of caustic soda required by the to-be-started electrolytic cell and the working electrolytic cell, control a valve on a fourth caustic soda transmission pipeline connecting the first shared caustic soda tank and the to-be-started electrolytic cell to be in an open state;

[0186] the fourth control module 1204 is configured to, if it is detected that an operation of starting a to-be-started electrolytic cell of a plurality of shutdown electrolytic cells is performed, the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, the temperature of the caustic soda in the second shared electrolytic cell is lower than a minimum value of the preset temperature range, the volume of the caustic soda in the first shared caustic soda tank does not meet the requirement of caustic soda required by the shutdown electrolytic cell and the working electrolytic cell, and the temperature of the caustic soda in the first shared caustic soda tank is higher than the minimum value of the preset temperature range and the difference between the temperature of the caustic soda in the first shared caustic soda tank and the minimum value is less than or equal to a first threshold, control the temperature control modules corresponding to the shutdown electrolytic cell and the to-be-started electrolytic cell to switch to the second working mode.

[0187] In a possible implementation, the temperature control module further comprises a lye cooler; wherein the input end of the temperature control module is connected with the input end of the lye cooler through a seventh lye transmission pipeline; a valve and a circulating pump are arranged on the seventh lye transmission pipeline; the temperature control module further comprises a fourth working mode, in which the valve on the seventh lye pipeline of the output end of the temperature control module is in an open state, the lye cooler is in a working state, and the valves on the other lye transmission pipelines of the output end of the temperature control module are in a closed state, and the temperature control module further comprises:

[0188] A fifth control module is configured to control the temperature control module corresponding to the to-be-started electrolytic cell and the working electrolytic cell to switch to the fourth working mode if it is detected that the operation of starting the to-be-started electrolytic cell in the plurality of stopped electrolytic cells is started, the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the lye in the plurality of shared electrolytic cells belongs to the preset temperature range.

[0189] A sixth control module is configured to control the temperature control module corresponding to the working electrolytic cell to switch to the fourth working mode and control the valve on the first lye transmission pipeline of the stopped electrolytic cell to be in a closed state if it is detected that the operation of starting the stopped electrolytic cell is not started, the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the lye in the plurality of shared lye tanks belongs to the preset temperature range.

[0190] In a possible implementation, the temperature control module further comprises a lye cooler; wherein the input end of the temperature control module is connected with the input end of the lye cooler through a seventh lye transmission pipeline; a valve and a circulating pump are arranged on the seventh lye transmission pipeline; the temperature control module further comprises a fourth working mode, in which the valve on the seventh lye pipeline of the output end of the temperature control module is in an open state, the lye cooler is in a working state, and the valves on the other lye transmission pipelines of the output end of the temperature control module are in a closed state, and the temperature control module further comprises:

[0191] A seventh control module is configured to control the temperature control module corresponding to all the electrolytic cells to switch to the fourth working mode if all the electrolytic cells are in a working state and the temperature of the lye in the plurality of shared lye tanks belongs to the preset temperature range.

[0192] In a possible implementation, the temperature control module further comprises a lye heater; wherein the input end of the temperature control module is connected with the input end of the lye heater through an eighth lye transmission pipeline; a valve and a circulating pump are arranged on the eighth lye transmission pipeline; the temperature control module further comprises a fifth working mode, in which the valve on the sixth lye pipeline of the output end of the temperature control module is in an open state, the heat release exchange device is in a working state, the valve on the eighth lye pipeline is in an open state, the lye heater is in a working state, and the valves on the other lye transmission pipelines of the output end of the temperature control module are in a closed state; and the temperature control module further comprises:

[0193] The determination module is used to determine the heating rate of the alkali solution if the following conditions are detected: the operation of starting an electrolytic cell among multiple shutdown electrolytic cells is detected; the temperature of the phase change heat storage and heat release device is greater than the preset temperature threshold; the temperature of the alkali solution in the second shared electrolytic cell is lower than the minimum value of the preset temperature range; and the volume of the alkali solution in the first shared alkali solution tank meets the alkali solution requirements of the electrolytic cell to be started and the working electrolytic cell.

[0194] The eighth control module is used to control the temperature control modules corresponding to the shutdown electrolytic cell and the electrolytic cell to be started to switch to the fifth working mode if the heating rate of the alkali solution is greater than the first preset rate.

[0195] The ninth control module is used to control the temperature control modules corresponding to the stopped electrolytic cell and the electrolytic cell to be started to switch to the second working mode if the heating rate of the alkali solution is less than or equal to the first preset rate.

[0196] This application also provides an electronic device in its embodiments. (See reference...) Figure 13 The diagram illustrates a structural schematic suitable for implementing the electronic device in the embodiments of this application. The electronic device in the embodiments of this application may include, but is not limited to, fixed terminals such as mobile phones, laptops, PDAs (personal digital assistants), PADs (tablet computers), desktop computers, etc. Figure 13 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0197] like Figure 13 As shown, the electronic device may include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.) 1301, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1302 or a program loaded from a storage device 1308 into a random access memory (RAM) 1303. When the electronic device is powered on, the RAM 1303 also stores various programs and data required for the operation of the electronic device. The processing unit 1301, ROM 1302, and RAM 1303 are interconnected via a bus 1304. An input / output (I / O) interface 1305 is also connected to the bus 1304.

[0198] In general, the following devices can be connected to the I / O interface 1305: input devices 1306 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, and the like; output devices 1307 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, and the like; storage devices 1308 including, for example, a memory card, a hard disk, and the like; and communication devices 1309. The communication devices 1309 can allow the electronic device to communicate wirelessly or wiredly with other devices to exchange data. Although ​ An electronic device having various devices is illustrated, but it is understood that all of the illustrated devices are not required and that more or fewer devices can be implemented.

[0199] The embodiment of the present application further provides a computer program product comprising computer readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the heat storage and heat preparation control methods of the alkaline electrolyzer provided by the embodiment of the present application.

[0200] The embodiment of the present application further provides a computer readable storage medium, which carries one or more computer programs, and when the one or more computer programs are executed by an electronic device, the electronic device can implement any of the heat storage and heat preparation control methods of the alkaline electrolyzer provided by the embodiment of the present application.

[0201] In addition, it should be noted that the above-described device embodiments are merely illustrative, and the units described as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., they can be located in one place, or they can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment. In addition, the connection relationship between the modules in the device embodiment provided by the present application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines.

[0202] Those skilled in the art can clearly understand that the application can be implemented by means of software plus necessary universal hardware, and of course can also be implemented by means of dedicated hardware including special integrated circuit, special CPU, special memory, special component, etc. Generally, any function completed by computer program can be easily implemented by corresponding hardware, and the specific hardware structure for implementing the same function can also be various, such as analog circuit, digital circuit or special circuit, etc. However, for the application, software program implementation is a better embodiment. Based on such understanding, the technical solution of the application or the part of the application which makes contribution to the prior art can be embodied in the form of software product, which is stored in readable storage medium, such as computer floppy disk, U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc., and includes a plurality of instructions for making a computer device (which can be personal computer, training device or network device, etc.) execute the method described in various embodiments of the application.

[0203] In the above embodiments, the implementation can be achieved by software, hardware, firmware or any combination thereof, entirely or partially. When implemented by software, the implementation can be achieved in the form of a computer program product, entirely or partially.

[0204] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the flow or function described in the embodiments of the application is generated entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another, for example, the computer instructions can be transmitted from one website, computer, training device or data center to another website, computer, training device or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be stored by the computer or a data storage device such as training device, data center, etc. integrated with one or more available media sets. The available medium can be magnetic medium (such as floppy disk, hard disk, magnetic tape), optical medium (such as DVD) or semiconductor medium (such as solid state disk (SSD)) etc.

Claims

1. A heat storage and backup device for an alkaline electrolytic cell, characterized in that, include: Phase change thermal storage and heat release device, controller, multiple temperature control modules and multiple shared alkali tanks; The temperature control module includes a heat absorption exchange device and a heat release exchange device; Each of the heat-absorbing exchange devices is disposed in the phase change heat storage and heat release device for storing heat in the alkaline solution in the phase change heat storage device, and each of the heat-releasing exchange devices is disposed in the phase change heat storage and heat release device for releasing heat in the phase change heat storage and heat release device to the alkaline solution. In this configuration, the first alkali transfer pipe of each electrolytic cell is connected to the input terminal of its corresponding temperature control module; the second number of second alkali transfer pipes at the output terminal of the temperature control module corresponding to each electrolytic cell are connected one-to-one with the input terminals of the plurality of shared alkali tanks, where the second number is the total number of the plurality of shared alkali tanks; any two shared alkali tanks are connected to each other via a third alkali transfer pipe; and the first number of fourth alkali transfer pipes of each shared alkali tank are connected one-to-one with the input terminals of the first number of electrolytic cells. The input terminal of the temperature control module is connected to the heat exchange device through the fifth alkali solution transmission pipe, the input terminal of the temperature control module is connected to the heat exchange device through the sixth alkali solution transmission pipe, and the input terminal of the temperature control module is connected to the output terminal of the temperature control module through the ninth alkali solution transmission pipe. Each of the first, second, third, fourth, fifth, sixth, and ninth alkali transfer pipes is equipped with a valve and a circulation pump. The temperature control module has three operating modes: a first operating mode, a second operating mode, and a third operating mode. The first working mode is that the valve on the fifth alkali solution transmission pipeline at the output end of the temperature control module is in the open state, and the heat exchange device is in the working state, while the valves on the other alkali solution transmission pipelines at the output end of the temperature control module are in the closed state. In the second working mode, the valve on the sixth alkali transfer pipeline at the output end of the temperature control module is in the open state, and the heat exchange device is in the working state, while the valves on the other alkali transfer pipelines at the output end of the temperature control module are in the closed state. The third working mode is that the valve on the ninth alkali pipeline at the output end of the temperature control module is in the open state, and the valves on other alkali transmission pipelines at the output end of the temperature control module are in the closed state. The controller is used to control the opening and closing of each of the valves, and to control the switching between the operating modes of the temperature control modules corresponding to each of the electrolytic cells.

2. The heat storage and backup device for an alkaline electrolytic cell according to claim 1, characterized in that, The temperature control module also includes an alkaline solution cooler; The input terminal of the temperature control module is connected to the input terminal of the alkali cooler through the seventh alkali transmission pipeline; the seventh alkali transmission pipeline is equipped with valves and a circulation pump. The temperature control module also includes a fourth operating mode, wherein the valve on the seventh alkali pipeline at the output end of the temperature control module is in the open state, the alkali cooler is in the working state, and the valves on other alkali transmission pipelines at the output end of the temperature control module are in the closed state.

3. A heat storage and backup device for an alkaline electrolytic cell according to any one of claims 1 or 2, characterized in that, The temperature control module also includes an alkaline solution heater; The input terminal of the temperature control module is connected to the input terminal of the alkali heater via the eighth alkali transfer pipeline; the eighth alkali transfer pipeline is equipped with a valve and a circulation pump. The temperature control module also includes a fifth operating mode, wherein the valve on the sixth alkali pipe at the output end of the temperature control module is in the open state, the heat exchange device is in the working state, the valve on the eighth alkali pipe is in the open state, the alkali heater is in the working state, and the valves on other alkali transmission pipes at the output end of the temperature control module are in the closed state.

4. The heat storage and backup device for the alkaline electrolytic cell according to any one of claims 1 or 2, characterized in that, Each of the electrolytic cells is equipped with a hydrogen-oxygen separation and purification device on the first alkali solution transmission pipeline.

5. A method for controlling the heat storage and backup of an alkaline electrolytic cell, characterized in that, The controller applied in the thermal storage and backup device of the alkaline electrolyzer as described in any one of claims 1 to 4, wherein the thermal storage and backup control method of the alkaline electrolyzer includes: If the temperature of the phase change thermal storage and heat release device is less than or equal to a preset temperature threshold, the temperature control module corresponding to the working electrolytic cell in the working state is controlled to switch to the first working mode. If the temperature of the phase change thermal storage and release device is greater than the preset temperature threshold, the valve on the first alkali solution delivery pipeline of the shutdown electrolytic cell is controlled to be open, and the temperature control devices corresponding to the shutdown electrolytic cell and the working electrolytic cell are controlled to be in the third working mode, and at least one of the multiple shared alkali solution tanks is controlled to be in working mode, and the valve on the third alkali solution output pipeline between the first shared alkali solution tank and the second shared alkali solution tank is controlled to be open, and the circulation pump on the third alkali solution output pipeline between the first shared alkali solution tank and the second shared alkali solution tank is controlled to circulate the alkali solution in the first shared alkali solution tank and the second shared alkali solution tank at a target speed; the target speed makes the temperature of the alkali solution in the first shared alkali solution tank within a preset temperature range; the second shared alkali solution tank being in working mode means that the valve on the fourth alkali solution delivery pipeline connected to the second shared alkali solution tank and the shutdown electrolytic cell is open, and the valve on the second alkali solution delivery pipeline connected to the temperature control module corresponding to the shutdown electrolytic cell and the second shared alkali solution tank is open. If an operation to start an electrolytic cell among multiple shutdown electrolytic cells is detected, and the temperature of the phase change heat storage and heat release device is greater than the preset temperature threshold, and the temperature of the alkali solution in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, and the volume of the alkali solution in the first shared alkali solution tank meets the alkali solution requirements of the electrolytic cell to be started and the working electrolytic cell, the valve on the fourth alkali solution transmission pipeline connected to the first shared alkali solution tank and the electrolytic cell to be started is controlled to be in the open state; If an operation to start a cell among multiple shutdown electrolytic cells is detected, and the temperature of the phase change thermal storage and release device is greater than the preset temperature threshold, and the temperature of the alkali solution in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, and the volume of the alkali solution in the first shared alkali solution tank does not meet the alkali solution requirements of the shutdown electrolytic cell and the working electrolytic cell, and the temperature of the alkali solution in the first shared alkali solution tank is higher than the minimum value of the preset temperature range and the difference between the temperature of the alkali solution in the first shared alkali solution tank and the minimum value is less than or equal to a first threshold, the temperature control modules corresponding to the shutdown electrolytic cell and the electrolytic cell to be started are controlled to switch to the second working mode.

6. The heat storage and backup control method for the alkaline electrolytic cell according to claim 5, characterized in that, The temperature control module further includes an alkali cooler; wherein, the input end of the temperature control module is connected to the input end of the alkali cooler via a seventh alkali transmission pipeline; a valve and a circulation pump are installed on the seventh alkali transmission pipeline; the temperature control module further includes a fourth operating mode, wherein the valve on the seventh alkali pipeline at the output end of the temperature control module is in the open state, the alkali cooler is in the operating state, and the valves on other alkali transmission pipelines at the output end of the temperature control module are in the closed state, and further includes: If an operation to start an electrolytic cell among multiple shut-down electrolytic cells is detected, and the temperature of the phase change thermal storage and heat release device is greater than the preset temperature threshold, and the temperature of the alkaline solution in the multiple shared electrolytic cells is within the preset temperature range, the temperature control module corresponding to the electrolytic cell to be started and the working electrolytic cell is controlled to switch to the fourth working mode. If no operation to start the shutdown electrolytic cell is detected, and the temperature of the phase change heat storage and release device is greater than the preset temperature threshold, and the temperature of the alkali solution in the multiple shared alkali solution tanks is within the preset temperature range, the temperature control module corresponding to the working electrolytic cell is controlled to switch to the fourth working mode, and the valve on the first alkali solution delivery pipeline of the shutdown electrolytic cell is controlled to be in the closed state.

7. The heat storage and backup control method for the alkaline electrolytic cell according to claim 6, characterized in that, Also includes: If all electrolytic cells are in operation and the alkali temperature in the multiple shared alkali tanks is within the preset temperature range, control the temperature control module corresponding to all electrolytic cells to switch to the fourth operating mode.

8. The heat storage and backup control method for the alkaline electrolytic cell according to claim 5, characterized in that, The temperature control module further includes an alkali heater; wherein, the input end of the temperature control module is connected to the input end of the alkali heater via an eighth alkali transmission pipeline; a valve and a circulation pump are installed on the eighth alkali transmission pipeline; the temperature control module further includes a fifth operating mode, wherein the valve on the sixth alkali pipeline at the output end of the temperature control module is in the open state, and the heat exchange device is in the operating state, and the valve on the eighth alkali pipeline is in the open state, and the alkali heater is in the operating state, and the valves on other alkali transmission pipelines at the output end of the temperature control module are in the closed state; it also includes: If an operation to start an electrolytic cell among multiple shut-down electrolytic cells is detected, and the temperature of the phase change heat storage and heat release device is greater than the preset temperature threshold, and the temperature of the alkaline solution in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, and the volume of the alkaline solution in the first shared alkaline solution tank meets the alkaline solution requirements of the electrolytic cell to be started and the working electrolytic cell, the heating rate of the alkaline solution is determined. If the heating rate of the alkali solution is greater than the first preset rate, the temperature control modules corresponding to the stopped electrolytic cell and the electrolytic cell to be started are switched to the fifth working mode. If the heating rate of the alkali solution is less than or equal to the first preset rate, the temperature control modules corresponding to the stopped electrolytic cell and the electrolytic cell to be started are controlled to switch to the second working mode.

9. A heat storage and backup control device for an alkaline electrolytic cell, characterized in that, The controller applied in the heat storage and backup device of the alkaline electrolyzer as described in any one of claims 1 to 4, wherein the heat storage and backup control device of the alkaline electrolyzer comprises: The first control module is used to control the temperature control module corresponding to the working electrolytic cell in the working state to switch to the first working mode if the temperature of the phase change thermal storage and heat release device is less than or equal to a preset temperature threshold. The second control module is configured to: control the valve on the first alkali delivery pipeline of the shutdown electrolytic cell to be open if the temperature of the phase change thermal storage and heat release device is greater than the preset temperature threshold; control the temperature control devices corresponding to the shutdown electrolytic cell and the working electrolytic cell to be in the third working mode; control at least one second shared alkali tank among the plurality of shared alkali tanks to be in a working state; control the valve on the third alkali output pipeline between the first shared alkali tank and the second shared alkali tank to be open; and control the circulation pump on the third alkali output pipeline between the first shared alkali tank and the second shared alkali tank to control the alkali circulation in the first shared alkali tank and the second shared alkali tank at a target speed; the target speed ensures that the temperature of the alkali in the first shared alkali tank is within a preset temperature range; the second shared alkali tank being in a working state means that the valve on the fourth alkali delivery pipeline connected to the second shared alkali tank and the shutdown electrolytic cell is open, and the valve on the second alkali delivery pipeline connected to the temperature control module corresponding to the shutdown electrolytic cell and the second shared alkali tank is open. The third control module is used to control the valve on the fourth alkali transmission pipeline connected to the electrolytic cell to be started to be open if the operation of starting one of multiple shutdown electrolytic cells is detected, and the temperature of the phase change heat storage and heat release device is greater than the preset temperature threshold, the temperature of the alkali solution in the second shared electrolytic cell is lower than the minimum value of the preset temperature range, and the volume of the alkali solution in the first shared alkali solution tank meets the alkali solution requirements of the electrolytic cell to be started and the working electrolytic cell. The fourth control module is used to control the temperature control modules corresponding to the shutdown electrolytic cells and the electrolytic cells to be started to switch to the second working mode if the following conditions are detected: the operation of starting a cell among multiple shutdown electrolytic cells is detected; the temperature of the phase change thermal storage and heat release device is greater than the preset temperature threshold; the temperature of the alkali solution in the second shared electrolytic cell is lower than the minimum value of the preset temperature range; the volume of the alkali solution in the first shared alkali solution tank does not meet the alkali solution requirements of the shutdown electrolytic cell and the working electrolytic cell; and the temperature of the alkali solution in the first shared alkali solution tank is higher than the minimum value of the preset temperature range and the difference between the temperature of the alkali solution in the first shared alkali solution tank and the minimum value is less than or equal to a first threshold.

10. A computer program product, characterized in that, It includes computer-readable instructions that, when executed on an electronic device, cause the electronic device to implement the heat storage and backup control method for an alkaline electrolyzer as described in any one of claims 5 to 8.

11. An electronic device, characterized in that, It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the electronic device can implement the heat storage and backup control method for the alkaline electrolyzer as described in any one of claims 5 to 8.

12. A computer storage medium, characterized in that, The storage medium carries one or more computer programs that, when executed by an electronic device, enable the electronic device to implement the heat storage and backup control method for an alkaline electrolytic cell as described in any one of claims 5 to 8.

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