Temperature regulation and control device of electrolytic bath

Abstract

The invention provides a temperature regulation and control device of an electrolytic cell. The temperature regulation and control device comprises a temperature regulation pipeline and a temperature regulation area arranged on the outer side wall of a cell shell of the aluminum electrolytic cell; the heating pipeline is used for conveying the heated fluid medium; the cooling pipeline is used for conveying the cooled fluid medium; the heat supply module is used for heating a fluid medium; the cooling module is used for cooling a fluid medium; the control module is used for judging the heat variation of the aluminum electrolysis cell and controlling the power module to convey the fluid medium heated by the heat supply module to the temperature adjusting pipeline through the heating pipeline or controlling the power module to convey the fluid medium cooled by the cold supply module to the temperature adjusting pipeline through the cooling pipeline based on the heat variation. The temperature of the electrolytic cell is accurately regulated and controlled, the utilization rate of new energy is increased, waste heat of an energy production factory is used for regulating and controlling the electrolytic cell, and stable and efficient production and reduction of carbon emission in the electrolysis process are achieved while unstable green energy electric power is consumed.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic aluminum and aluminum-based alloys, and in particular to a temperature control device for an electrolytic cell. Background Art

[0002] In the field of electrolytic aluminum technology, the production process of aluminum consumes a lot of electricity and mainly relies on thermal power generation, making the industry the main source of carbon emissions in the non-ferrous metal industry. With the growing global demand for reducing carbon emissions and promoting green energy transformation, the aluminum electrolysis industry faces the challenge of reducing energy consumption and carbon emissions.

[0003] In the traditional aluminum electrolysis production process, the electrolytic cell needs to be maintained within a narrow "thermal balance" temperature range to ensure production efficiency and product quality. However, the volatility, seasonality and randomness of renewable energy generation make it difficult for the electrolytic cell to flexibly adapt to changes in energy supply, especially when the renewable energy power generation fluctuates. The electrolytic cell cannot respond quickly to maintain thermal balance and is prone to overheating or cooling and solidification, resulting in production interruptions and energy waste.

[0004] In order to maintain the energy balance of the electrolytic cell, the temperature of the electrolytic cell needs to be adjusted. However, the existing electrolytic cell temperature control technology has some limitations, such as only increasing heat dissipation but not effectively keeping warm, or when adjusting the heat dissipation of the side of the electrolytic cell, only the air volume is often considered, while the heat transfer temperature difference and the control potential of other fluid media are ignored, and the convection heat transfer theory is not fully utilized for optimization, and the above problems cannot be effectively solved. Summary of the invention

[0005] The present invention provides a temperature control device for an electrolytic cell, which is used to solve the technical problem in the prior art that the temperature of the electrolytic cell cannot be accurately and effectively controlled.

[0006] On the one hand, the present invention provides a temperature control device for an electrolytic cell, comprising a control system and a cooling and heating system, wherein the control system comprises a temperature regulating pipeline, a heating pipeline, a cooling pipeline, a power module and a control module, and the cooling and heating system comprises a heating module and a cooling module; The temperature regulating pipeline is arranged in the temperature regulating area of ​​the outer wall of the tank shell of the aluminum electrolysis tank; wherein the temperature regulating area corresponds to the electrolyte melt area in the aluminum electrolysis tank; The heating pipeline is used to transport the heated fluid medium; The cooling pipeline is used to transport the cooled fluid medium; The heating module is used to heat the fluid medium; wherein the heating module includes an external gas turbine power generation tail gas waste heat utilization module, a thermal power generation waste heat utilization module, an electrolytic cell flue gas waste heat utilization module and a roasting chamber heating module; The cooling module is used to cool the fluid medium; wherein the cooling module includes an air cooling module and a water cooling module; The power module is connected to the temperature regulating pipeline, the heating pipeline and the cooling pipeline respectively; The control module is used to determine the heat change of the aluminum electrolytic cell, and based on the heat change, control the power module to transport the fluid medium heated by the heating module to the temperature regulating pipeline through the heating pipeline, or control the power module to transport the fluid medium cooled by the cooling module to the temperature regulating pipeline through the cooling pipeline.

[0007] According to a temperature control device for an electrolytic cell provided by the present invention, the control module is used for: Calculate the heat change between the input heat of the aluminum electrolytic cell and the preset reference heat; When the amount of heat change is less than 0, controlling the power module to transport the fluid medium heated by the heating module to the temperature regulating pipeline through the heating pipeline; and / or reducing the flow rate of the fluid medium in the temperature regulating pipeline; When the heat change is greater than 0, the power module is controlled to transport the fluid medium cooled by the cooling module to the temperature regulating pipeline through the cooling pipeline; and / or the flow rate of the fluid medium in the temperature regulating pipeline is increased.

[0008] According to a temperature control device for an electrolytic cell provided by the present invention, the control module is used for: Acquiring a first temperature of the aluminum electrolysis cell and a second temperature of the fluid medium in the temperature regulating pipeline; calculating a first temperature difference between the first temperature and the second temperature; Determining a convective heat transfer coefficient of the fluid medium in the temperature regulating pipeline based on the flow rate, dynamic viscosity, specific heat, density and heat transfer area magnification factor of the fluid medium in the temperature regulating pipeline; Determining an initial heat dissipation amount of the aluminum electrolysis cell based on the convection heat transfer coefficient, the first temperature difference, and a heat exchange area of ​​a cell body of the aluminum electrolysis cell; When the heat change is less than 0, obtaining a first target heat dissipation of the aluminum electrolysis cell based on the initial heat dissipation of the aluminum electrolysis cell and the heat change; Based on the first target heat dissipation, the heat supply module is controlled to heat the fluid medium; and / or the power module is controlled to reduce the flow rate of the fluid medium in the temperature regulating pipeline.

[0009] According to a temperature control device for an electrolytic cell provided by the present invention, the control module is used for: When the heat change is greater than 0, a second target heat dissipation of the aluminum electrolysis cell is obtained based on the initial heat dissipation of the aluminum electrolysis cell and the heat change; Based on the second target heat dissipation, the cooling module is controlled to cool the fluid medium; and / or the power module is controlled to speed up the flow rate of the fluid medium in the temperature regulating pipeline.

[0010] According to a temperature control device for an electrolytic cell provided by the present invention, the heat change is expressed by the following formula: ;in, is the heat change, To access heat, is the preset reference heat of the electrolytic cell, is the input voltage, To access the current, is the preset reference current, is a preset reference voltage; The convective heat transfer coefficient of the fluid medium in the temperature regulating pipeline is shown in the following formula: ;in, is the convective heat transfer coefficient, is the heat transfer area magnification factor, is the density, is the flow rate, is the specific heat, is the dynamic viscosity; The initial heat dissipation is shown in the following formula: ;in, is the initial heat dissipation, is the heat exchange area, is the first temperature, is the second temperature.

[0011] According to a temperature control device for an electrolytic cell provided by the present invention, the heat supply module is controlled to heat the fluid medium based on the first target heat dissipation; and / or the power module is controlled to reduce the flow rate of the fluid medium in the temperature regulating pipeline, including: Determine a second temperature difference between the current temperature of the aluminum electrolysis cell and a first preset temperature threshold; wherein the first preset temperature threshold is the maximum temperature of the aluminum electrolysis cell; When the second temperature difference is greater than a second preset temperature threshold, controlling the heating module to heat the fluid medium; and / or controlling the power module to reduce the flow rate of the fluid medium in the temperature regulating pipeline; When the second temperature difference is less than or equal to the second preset temperature threshold, the power module is controlled to reduce the flow rate of the fluid medium in the temperature regulating pipeline.

[0012] According to a temperature control device for an electrolytic cell provided by the present invention, the cooling module is controlled to cool the fluid medium based on the second target heat dissipation; and / or the power module is controlled to speed up the flow rate of the fluid medium in the temperature regulating pipeline, including: Determine a third temperature difference between the current temperature of the aluminum electrolysis cell and a third preset temperature threshold; wherein the third preset temperature threshold is the lowest temperature of the aluminum electrolysis cell; Determine a flow rate difference between a current flow rate of the fluid medium in the temperature regulating pipeline and a preset flow rate; wherein the preset flow rate is a maximum flow rate of the fluid medium in the temperature regulating pipeline; When the third temperature difference is greater than a fourth preset temperature threshold, and the flow rate difference is greater than a preset speed threshold, controlling the cooling module to cool the fluid medium; and / or controlling the power module to speed up the flow rate of the fluid medium in the temperature regulating pipeline; When the third temperature difference is greater than a fourth preset temperature threshold, and the flow rate difference is less than a preset flow rate threshold, controlling the cooling module to cool the fluid medium; When the third temperature difference is less than a fourth preset temperature threshold, and the flow rate difference is greater than a preset speed threshold, the power module is controlled to increase the flow rate of the fluid medium in the temperature regulating pipeline.

[0013] According to a temperature control device for an electrolytic cell provided by the present invention, when the heat change is less than 0, a first target heat dissipation of the aluminum electrolytic cell is obtained based on the initial heat dissipation of the aluminum electrolytic cell and the heat change, including: Subtract the absolute value of the heat change from the initial heat dissipation to obtain the first target heat dissipation; When the heat change is greater than 0, obtaining a second target heat dissipation of the aluminum electrolysis cell based on the initial heat dissipation of the aluminum electrolysis cell and the heat change includes: The initial heat dissipation is added to the heat change to obtain the second target heat dissipation.

[0014] According to a temperature control device for an electrolytic cell provided by the present invention, the temperature regulating pipeline includes a plurality of sub-pipelines; The sub-pipelines are arranged longitudinally, and the heads and tails of the sub-pipelines are connected in sequence; The uppermost sub-pipeline among the sub-pipelines is used as an input pipeline for the fluid medium; The sub-pipeline located at the bottom of each of the sub-pipelines serves as an output pipeline for the fluid medium; The number of the control systems is two; One of the temperature regulating pipelines is arranged at half of the length direction of the temperature regulating area; The other temperature regulating pipeline is arranged at the other half of the length direction of the temperature regulating area.

[0015] According to the present invention, a temperature control device for an electrolytic cell is provided, wherein the temperature control device is used to receive electric energy provided by green electric energy and electric energy provided by gas-fired power generation energy; When the power generation of the green electric energy is greater than or equal to the preset power threshold, the temperature control device receives the electric energy provided by the green electric energy; When the power generation of the green electric energy is less than the preset power threshold, the temperature control device receives the electric energy provided by the gas-fired power generation energy.

[0016] The temperature control device of the electrolytic cell provided by the present invention, the heating module is used to heat the fluid medium; wherein the heating module may include an external gas turbine power generation tail gas waste heat utilization module, a thermal power generation waste heat utilization module, an electrolytic cell flue gas waste heat utilization module and a roasting chamber heating module. The cooling module is used to cool the fluid medium; wherein the cooling module may include an air cooling module and a water cooling module. The control module is used to judge the heat change of the aluminum electrolytic cell, and based on the heat change, control the power module to transport the fluid medium heated by the heating module to the temperature regulating pipeline through the heating pipeline, or control the power module to transport the fluid medium cooled by the cooling module to the temperature regulating pipeline through the cooling pipeline. Through an independent control system and a cooling and heating system, the temperature of the electrolytic cell can be accurately controlled to ensure that the electrolysis process is carried out under the optimal temperature conditions, improve the electrolysis efficiency and product quality, and utilize the waste heat and cooling system to adapt to the volatility of new energy power generation, realize the flexible production of the electrolytic cell, improve the utilization rate of new energy, and also help reduce carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is one of the structural schematic diagrams of the temperature control device for an electrolytic cell provided in an embodiment of the present invention; Figure 2 This is a second structural schematic diagram of the temperature control device for an electrolytic cell provided in an embodiment of the present invention; Figure 3This is a third structural schematic diagram of the temperature control device for an electrolytic cell provided in an embodiment of the present invention; Figure 4 This is a fourth structural schematic diagram of the temperature control device for an electrolytic cell provided in an embodiment of the present invention; Figure 5 It is a schematic diagram of an application scenario of the temperature control device for an electrolytic cell provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Figure 1 This is one of the structural schematic diagrams of the temperature control device for an electrolytic cell provided in an embodiment of the present invention; Figure 2 This is a second structural schematic diagram of the temperature control device for an electrolytic cell provided in an embodiment of the present invention; Figure 3 This is a third structural schematic diagram of the temperature control device for an electrolytic cell provided in an embodiment of the present invention; Figure 4 This is a fourth structural schematic diagram of the temperature control device for an electrolytic cell provided in an embodiment of the present invention; Figure 5 It is a schematic diagram of an application scenario of the temperature control device for an electrolytic cell provided in an embodiment of the present invention.

[0021] The electrolytic cell can be an aluminum-silicon electrolytic cell or an aluminum electrolytic cell. New energy power generation has the characteristics of volatility, seasonality and randomness. When the electrolytic cell is connected to green electricity, it will be affected by the volatility of new energy. To ensure the smooth operation of the electrolytic cell, it is necessary to utilize the coupling peak regulation between grid power, gas power generation and wind power, establish an independent electrical control center, carry out internal load allocation of the enterprise, and realize power balance control, system operation optimization, power quality management and economic analysis and judgment.

[0022] In the present invention, the regulation mode of the power system is: 1. Prioritize the absorption of wind power load, adopt multiple generation and multiple use, and strictly control the wind loss. 2. Thermal power generation produces at full load and absorbs sufficient load when the installed capacity load allows (gas-fired power generation is used for peak regulation during peak regulation, and the regulation response is fast); due to the lack of load caused by planned maintenance or non-stop during its operation cycle, the regulation speed is slow, and the grid power needs to perform transition regulation. 3. The grid power is used as a fast-responding load to perform transition regulation, absorb as little grid power load as possible, and reduce grid access electricity charges. 4. The control center comprehensively considers comprehensive factors such as the safety and stability of the power system, the load regulation capability, and the economy. When the load supply cannot meet the actual production needs, it is necessary to cooperate with load reduction to ensure the stable operation of production and the power system.

[0023] System energy compensation and comprehensive utilization: When the green electricity input energy of the electrolytic cell decreases, it is necessary to compensate for the reduced energy of the electrolytic cell to ensure the smooth operation of the electrolytic cell. In the present invention, adjustments can be made from two aspects. On the one hand, the input energy can be increased, and on the other hand, the heat loss of the electrolytic cell can be reduced. Specifically, gas-fired power generation can be used to power the electrolytic cell to supplement the reduced energy of green electricity input. The waste heat of the exhaust gas from the gas-fired power generation can be used to heat the fluid medium in the pipeline. After flow and temperature control, the fluid medium is sent to the temperature regulating pipeline 301 on the side wall of the electrolytic cell, and the high-temperature fluid medium is continuously attached to the side of the electrolytic cell to ensure efficient insulation effect on the side of the electrolytic cell, which can not only improve the peak-shaving capacity of the electrolytic cell, but also make full use of energy. Similarly, when the energy input of the electrolytic cell connected to green electricity increases, part of the green electricity can be used for electrolysis, and the other part can be used for the cooling module 402. The cooling module 402 reduces the fluid medium to the required low temperature and sends it into the temperature regulating pipeline 301. The continuous low-temperature medium exchanges heat with the side wall of the electrolytic cell, bringing the heat out of the electrolytic cell, ensuring efficient heat dissipation of the electrolytic cell and ensuring stable operation of the electrolytic cell.

[0024] In the present invention, Figure 5As shown, the fan can generate electricity and provide electricity to the power grid. Natural gas can be used as an energy source, mixed with air in the combustion chamber for combustion, and generate heat. The compressor can be used to compress gas such as natural gas or air. The waste heat recovery device can recover the heat energy of the turbine and gas turbine and use it to heat the fluid medium. The waste heat recovery device can also be regarded as a heating module 401. Driven by the generator (which can be regarded as a power module 304), the fluid medium can enter the temperature regulating pipeline 301 and exchange heat with the electrolytic cell. The cooling module 402 can reduce the temperature of the fluid medium. The monitoring module can monitor the temperature and flow rate of the fluid medium. The purification module can purify the exhaust gas generated by combustion, and the exhaust gas can be stored or discharged after purification. The number of electrolytic cells (there are aluminum liquid and electrolyte in the electrolytic cell) can be multiple, for example, it can include electrolytic cell, electrolytic cell 2, electrolytic cell 3 and electrolytic cell 4. The valve can control the flow rate of the heated fluid medium and the flow rate of the cooled fluid medium.

[0025] See also Figures 1 to 5 The temperature control device 20 of the electrolytic cell may include a control system 30 and a cooling and heating system 40. The control system 30 may include a temperature regulating pipeline 301, a heating pipeline 302, a cooling pipeline 303, a power module 304 and a control module 305. The cooling and heating system 40 may include a heating module 401 and a cooling module 402.

[0026] The temperature regulating pipeline 301 is arranged in the temperature regulating area of ​​the outer wall of the tank shell of the aluminum electrolysis cell; wherein the temperature regulating area corresponds to the electrolyte melt area in the aluminum electrolysis cell.

[0027] The heating pipeline 302 is used to transport heated fluid medium.

[0028] The cooling pipeline 303 is used to transport the cooled fluid medium.

[0029] The heating module 401 is used to heat the fluid medium; wherein, the heating module 401 may include an external gas turbine power generation tail gas waste heat utilization module, a thermal power generation waste heat utilization module, an electrolyzer flue gas waste heat utilization module and a roasting chamber heating, etc. It can be understood that after the heating module 401 heats the fluid medium, it can be transported to the heating pipeline 302. A valve that can be controlled to open and close is provided between the heating module 401 and the heating pipeline 302.

[0030] The cooling module 402 is used to cool the fluid medium; wherein, the cooling module 402 may include an air cooling module and a water cooling module. Of course, the cooling module 402 may also include a natural wind module, which directly introduces natural wind for cooling. It is understood that after the cooling module 402 cools the fluid medium, it can be transported to the cooling pipeline 303. A valve that can be controlled to open and close is provided between the cooling module 402 and the cooling pipeline 303.

[0031] The power module 304 is connected to the temperature regulating pipeline 301, the heating pipeline 302 and the cooling pipeline 303 respectively. The power module 304 can be a motor. A controllable valve can also be set between the power module 304 and the heating pipeline 302, and a controllable valve can also be set between the power module 304 and the cooling pipeline 303. The fluid medium flowing out of the temperature regulating pipeline 301 can also be returned to the heating module 401 or the cooling module 402.

[0032] The control module 305 is used to determine the heat change of the aluminum electrolytic cell, and based on the heat change, controls the power module 304 to transport the fluid medium heated by the heating module 401 to the temperature regulating pipeline 301 through the heating pipeline 302, or controls the power module 304 to transport the fluid medium cooled by the cooling module 402 to the temperature regulating pipeline 301 through the cooling pipeline 303.

[0033] In this embodiment, the heating module 401 is used to heat the fluid medium; wherein the heating module 401 may include an external gas turbine power generation tail gas waste heat utilization module, a thermal power generation waste heat utilization module, an electrolytic cell flue gas waste heat utilization module and a roasting chamber heating module 401. The cooling module 402 is used to cool the fluid medium; wherein the cooling module 402 may include an air cooling module and a water cooling module. The control module 305 is used to determine the amount of heat change of the aluminum electrolytic cell, and based on the amount of heat change, control the power module 304 to transport the fluid medium heated by the heating module 401 to the temperature regulating pipeline 301 through the heating pipeline 302, or control the power module 304 to transport the fluid medium cooled by the cooling module 402 to the temperature regulating pipeline 301 through the cooling pipeline 303. This embodiment uses an independent control system 30 and a cooling and heating system 40 to achieve precise control of the temperature of the electrolytic cell, ensuring that the electrolysis process is carried out under optimal temperature conditions, improving electrolysis efficiency and product quality, and utilizing waste heat and a cooling system to adapt to the volatility of renewable energy power generation, achieving flexible production of electrolytic cells, improving the utilization rate of renewable energy, and also helping to reduce carbon emissions.

[0034] In one embodiment of this specification, the control module 305 is used to: Calculate the heat change between the input heat of the aluminum electrolytic cell and the preset reference heat; When the heat change is less than 0, the power module 304 is controlled to transport the fluid medium heated by the heating module 401 to the temperature regulating pipeline 301 through the heating pipeline 302; and / or reduce the flow rate of the fluid medium in the temperature regulating pipeline 301; When the heat change is greater than 0, the control power module 304 transfers the fluid medium cooled by the cooling module 402 to the temperature regulating pipeline 301 through the cooling pipeline 303 ; and / or increases the flow rate of the fluid medium in the temperature regulating pipeline 301 .

[0035] In this embodiment, when the amount of heat change is less than 0, it indicates that the aluminum electrolytic cell needs to be kept warm. When the amount of heat change is greater than 0, it indicates that the aluminum electrolytic cell needs to be cooled and dissipated. By calculating the amount of heat change between the input heat and the preset reference heat (that is, the heat generated by the reference voltage and reference current under normal operation of the electrolytic cell), the operation of the heating and cooling module 402 can be dynamically adjusted to adapt to the temperature requirements of the electrolytic cell and achieve more accurate heat management. In addition, the aluminum electrolytic cell can be heated and cooled by adjusting the flow rate and / or temperature of the fluid medium, that is, the aluminum electrolytic cell can be heated and cooled by a variety of control methods, which is very flexible and can better adapt to the actual working requirements of the aluminum electrolytic cell.

[0036] In one embodiment of this specification, the control module 305 is used to: Acquire a first temperature of the aluminum electrolysis cell and a second temperature of the fluid medium in the temperature regulating pipeline 301; Calculate a first temperature difference between the first temperature and the second temperature; Determine the convective heat transfer coefficient of the fluid medium in the temperature regulating pipeline 301 based on the flow rate, dynamic viscosity, specific heat, density and heat transfer area magnification factor of the fluid medium in the temperature regulating pipeline 301; Determine the initial heat dissipation of the aluminum electrolysis cell based on the convection heat transfer coefficient, the first temperature difference and the heat exchange area of ​​the cell body of the aluminum electrolysis cell; When the heat change is less than 0, a first target heat dissipation of the aluminum electrolysis cell is obtained based on the initial heat dissipation of the aluminum electrolysis cell and the heat change; Based on the first target heat dissipation, the heat supply module 401 is controlled to heat the fluid medium; and / or the power module 304 is controlled to reduce the flow rate of the fluid medium in the temperature regulating pipeline 301 .

[0037] In this embodiment, the heat exchange area of ​​the tank body may refer to the temperature adjustment area of ​​the outer wall of the tank shell. By calculating the first temperature difference and the convection heat transfer coefficient, the initial heat dissipation can be more accurately determined, and the heat dissipation of the electrolytic cell can be accurately controlled to ensure the temperature stability of the electrolytic cell under different working conditions. By optimizing the flow rate and temperature of the fluid medium, the heat exchange efficiency can be improved and energy waste can be reduced.

[0038] In one embodiment of this specification, the control module 305 is used to: When the heat change is greater than 0, a second target heat dissipation of the aluminum electrolysis cell is obtained based on the initial heat dissipation of the aluminum electrolysis cell and the heat change; Based on the second target heat dissipation, the cooling module 402 is controlled to cool the fluid medium; and / or the power module 304 is controlled to speed up the flow rate of the fluid medium in the temperature regulating pipeline 301 .

[0039] In this embodiment, by controlling the cooling module 402 and the power module 304, it is possible to quickly respond to heat changes, increase heat dissipation, protect the electrolytic cell from overheating damage, and improve production safety and stability. By adjusting the flow rate of the fluid medium, the heat dissipation effect can be optimized to ensure stable operation of the electrolytic cell under high current conditions.

[0040] In one embodiment of the present specification, the heat change is expressed by the following formula (1): (1); among which, is the heat change, To access heat, is the preset reference heat of the electrolytic cell, is the input voltage, To access the current, is the preset reference current, is the preset reference voltage.

[0041] The convective heat transfer coefficient of the fluid medium in the temperature regulating pipeline 301 is shown in the following formula (2): (2) Among them, is the convective heat transfer coefficient, is the heat transfer area magnification factor, is the density, is the flow rate, is the specific heat, is the dynamic viscosity; The initial heat dissipation is shown in the following formula (3): (3); among which, is the initial heat dissipation, is the heat exchange area, is the first temperature, is the second temperature.

[0042] In this embodiment, based on the above formulas, the control system 30 can accurately calculate and adjust the heat supply and heat dissipation according to these formulas, thereby improving the accuracy and reliability of temperature control. By calculating the standardized heat and convection heat transfer coefficient, the operation of the control system 30 can be simplified, human errors can be reduced, and the stability and reliability of the system can be improved. The parameters used in the above formulas can all be known in advance.

[0043] In one embodiment of the present specification, based on the first target heat dissipation, controlling the heating module 401 to heat the fluid medium; and / or controlling the power module 304 to reduce the flow rate of the fluid medium in the temperature regulating pipeline 301 includes: Determine a second temperature difference between the current temperature of the aluminum electrolysis cell and a first preset temperature threshold; wherein the first preset temperature threshold is the maximum temperature of the aluminum electrolysis cell; When the second temperature difference is greater than the second preset temperature threshold, the heating module 401 is controlled to heat the fluid medium; and / or the power module 304 is controlled to reduce the flow rate of the fluid medium in the temperature regulating pipeline 301; When the second temperature difference is less than or equal to the second preset temperature threshold, the power module 304 is controlled to reduce the flow rate of the fluid medium in the temperature regulating pipeline 301 .

[0044] In this embodiment, when the second temperature difference is greater than the second preset temperature threshold, it indicates that the temperature of the electrolytic cell can still be increased, and the heating module 401 is controlled to heat the fluid medium; and / or the power module 304 is controlled to reduce the flow rate of the fluid medium in the temperature regulating pipeline 301. When the second temperature difference is less than or equal to the second preset temperature threshold, it indicates that the temperature of the electrolytic cell is close to the maximum temperature and cannot continue to increase, and the power module 304 is controlled to reduce the flow rate of the fluid medium in the temperature regulating pipeline 301. This embodiment avoids the excessive temperature of the electrolytic cell, ensures the continuity and stability of the electrolysis process, and realizes the flexible selection of the control mode according to the actual working conditions of the aluminum electrolytic cell, so that the working temperature of the aluminum electrolytic cell is always within a reasonable range. Both the first preset temperature threshold and the second preset temperature threshold can be set.

[0045] In one embodiment of the present specification, based on the second target heat dissipation, controlling the cooling module 402 to cool the fluid medium; and / or controlling the power module 304 to speed up the flow rate of the fluid medium in the temperature regulating pipeline 301 includes: Determine a third temperature difference between the current temperature of the aluminum electrolysis cell and a third preset temperature threshold; wherein the third preset temperature threshold is the lowest temperature of the aluminum electrolysis cell; Determine a flow rate difference between a current flow rate of the fluid medium in the temperature regulating pipeline 301 and a preset flow rate; wherein the preset flow rate is a maximum flow rate of the fluid medium in the temperature regulating pipeline 301; When the third temperature difference is greater than the fourth preset temperature threshold, and the flow rate difference is greater than the preset speed threshold, the cooling module 402 is controlled to cool the fluid medium; and / or the power module 304 is controlled to speed up the flow rate of the fluid medium in the temperature regulating pipeline 301; When the third temperature difference is greater than a fourth preset temperature threshold, and the flow rate difference is less than a preset flow rate threshold, controlling the cooling module 402 to cool the fluid medium; When the third temperature difference is less than the fourth preset temperature threshold, and the flow rate difference is greater than the preset speed threshold, the power module 304 is controlled to increase the flow rate of the fluid medium in the temperature regulating pipeline 301 .

[0046] In this embodiment, the third temperature difference is greater than the fourth preset temperature threshold, indicating that the temperature of the electrolytic cell can continue to decrease. The flow rate difference is greater than the preset speed threshold, indicating that the flow rate can continue to increase. By comprehensively considering the temperature difference and the flow rate difference, the cooling and fluid medium flow rates can be controlled more flexibly to adapt to the temperature changes of the electrolytic cell, improve the adaptability and flexibility of temperature control, avoid the temperature of the aluminum electrolytic cell being too low, and avoid the flow rate of the fluid medium being too fast, to ensure the stable operation of the electrolytic cell. The third preset temperature threshold and the fourth preset temperature threshold can be set. The fourth preset temperature threshold can be equal to the second preset temperature threshold. The preset flow rate and preset speed thresholds can be set according to.

[0047] In one embodiment of the present specification, when the heat change is less than 0, a first target heat dissipation of the aluminum electrolysis cell is obtained based on the initial heat dissipation of the aluminum electrolysis cell and the heat change, including: Subtract the absolute value of the heat change from the initial heat dissipation to obtain the first target heat dissipation; When the heat change is greater than 0, based on the initial heat dissipation and heat change of the aluminum electrolysis cell, a second target heat dissipation of the aluminum electrolysis cell is obtained, including: Add the initial heat dissipation to the heat change to obtain the second target heat dissipation.

[0048] In this embodiment, the method of obtaining the first target heat dissipation and the second target heat dissipation is very simple, and the target heat dissipation can be adjusted quickly, which simplifies the heat adjustment process and improves the efficiency and response speed of temperature control.

[0049] Specifically, the initial heat dissipation can be expressed as express, ,in, The flow rate of the fluid medium before adjusting the velocity, The temperature of the fluid medium before adjusting the temperature. The first target heat dissipation can be express, ,in, is the flow rate after adjusting the velocity of the fluid medium, The temperature of the fluid medium after the temperature is adjusted. The heat difference between the first target heat dissipation and the initial heat dissipation can be used express, In general, it can be considered However, considering that the aluminum electrolysis cell can not only exchange heat with the temperature regulating pipe 301 through the temperature regulating area, but also other areas of the aluminum electrolysis cell can dissipate heat. Therefore, it can be defined = , represents the heat dissipation constant of other parts, represents the correction factor, and All of them can be set according to the actual situation and are known quantities. In other words, the heat difference between the first target heat dissipation and the initial heat dissipation is equal to the heat change minus .

[0050] In one embodiment of this specification, the temperature regulating pipeline 301 includes a plurality of sub-pipelines; Each sub-pipeline is arranged longitudinally, and the head and tail of each sub-pipeline are connected in sequence; The uppermost sub-pipeline among the sub-pipelines is used as an input pipeline for the fluid medium; The sub-pipeline located at the bottom of each sub-pipeline serves as an output pipeline for the fluid medium.

[0051] In this embodiment, through the design of multiple sub-pipelines, the temperature of the side wall of the electrolytic cell can be evenly distributed, the risk of local overheating or overcooling can be reduced, and the stability and safety of the electrolytic cell can be improved. The number of sub-pipelines is not specifically limited, for example, it can be 2, 3, 5 or more.

[0052] In one embodiment of this specification, the number of control systems 30 is two; A temperature regulating pipeline 301 is arranged at half of the length direction of the temperature regulating area; Another temperature regulating pipeline 301 is disposed at the other half of the length direction of the temperature regulating area.

[0053] In this embodiment, by setting temperature regulating pipelines 301 in two different areas of the electrolytic cell, the temperature of the electrolytic cell can be controlled more evenly, thereby improving the uniformity and efficiency of temperature control. Through two independent control systems 30, independent temperature control can be performed on different areas of the electrolytic cell, thereby enhancing the flexibility and adaptability of temperature control.

[0054] It can be understood that the control system 30 may include a monitoring module, and the monitoring module may include a temperature measurement module 306 and a medium flow rate measurement module 307. The temperature measurement module 306 can monitor the temperature of the fluid medium and the temperature of the electrolytic cell in real time. The medium flow rate measurement module 307 can measure the flow rate of the fluid medium in the temperature regulating pipeline 301 and other pipelines. The number of temperature measurement modules 306 and medium flow rate measurement modules 307 can be set as needed, and no specific limitation is made here. In addition to being applicable to aluminum electrolytic cells, the present invention can also be applicable to aluminum silicon cells and other types of electrolytic cells, and has strong versatility. The present invention is also not limited to the number of electrolytic cells, which can be one or more, such as four or six or more.

[0055] The temperature control device 20 can also be connected to the electrical control center for communication, and the electrical control center can display the working process of the temperature control device 20. For example, the temperature and flow rate of the fluid medium obtained above, the temperature of the aluminum electrolysis cell, the working voltage and working current of the aluminum electrolysis cell, the initial heat dissipation, the heat change, the first target heat dissipation, and the second target heat dissipation obtained by calculation can be displayed in the electrical control center.

[0056] In one embodiment of this specification, the temperature control device is used to receive electric energy provided by green electric energy and electric energy provided by gas-fired power generation energy; When the power generation of the green electric energy is greater than or equal to the preset power threshold, the temperature control device receives the electric energy provided by the green electric energy; When the power generation of the green electric energy is less than the preset power threshold, the temperature control device receives the electric energy provided by the gas-fired power generation energy.

[0057] In this embodiment, a preset power threshold can be set. The temperature control device receives the electric energy provided by the green electric energy source, which can be used to power the heating module, the cooling module and other modules. The present invention uses the waste heat of the energy production plant to regulate the flexible production of molten salt electrolytic cells or molten salt electroeutectoid cells and the carbon emission reduction in the electrochemical preparation process of metal or alloy molten salts. It involves the output coupling regulation between green electricity and fossil energy electricity and the thermal balance control of the new structure molten salt electrolytic cells and molten salt electroeutectoid devices. While absorbing unstable green energy electricity, it realizes the stable and efficient production of the molten salt electrolysis process and the molten salt electroeutectoid process and the reduction of carbon emissions.

[0058] In some other embodiments of the present specification, the heating module may further include a phase-change energy storage unit, which is capable of storing and releasing heat to achieve thermal energy balance regulation of the heating module; The phase change energy storage unit comprises a phase change material container and a heat exchanger, wherein the phase change material container is filled with a phase change material, and the phase change material can absorb and release a large amount of heat within a specific temperature range; The heat exchanger is disposed between the phase change material container and the fluid medium conveying pipeline of the heating module, and is used to transfer the heat generated by the heating module to the phase change material, or to transfer the heat released by the phase change material to the fluid medium; The control module can dynamically adjust the energy storage and release process of the phase change energy storage unit according to the heat demand of the aluminum electrolysis cell and the heating capacity of the heating module; When the heating capacity of the heating module is greater than the heat demand of the aluminum electrolysis cell, the control module controls the phase change energy storage unit to absorb excess heat for energy storage; When the heating capacity of the heating module is insufficient, the control module controls the phase change energy storage unit to release the stored heat to supplement the insufficient heating of the heating module, thereby ensuring that the electrolytic cell temperature control device can continuously and stably provide the required heat for the aluminum electrolytic cell; The phase-change energy storage unit further includes a temperature regulating device, which can preheat or cool the phase-change material according to the phase-change temperature range of the phase-change material to optimize the energy storage and release efficiency of the phase-change energy storage unit; The temperature regulating device comprises a heating element and a cooling element, wherein the heating element is used to heat the phase change material when the temperature is lower than the phase change temperature range, and the cooling element is used to cool the phase change material when the temperature is higher than the phase change temperature range; The control module can intelligently control the operating status of the heating element and the cooling element according to the real-time temperature of the phase change material and the heat demand of the aluminum electrolytic cell, so as to achieve precise temperature control of the phase change energy storage unit, further improving the flexibility and adaptability of the electrolytic cell temperature control device.

[0059] Phase Change Material (PCM) is a type of material that can undergo phase change (such as solid to liquid or liquid to gas) within a specific temperature range. During the phase change process, the PCM absorbs or releases a large amount of heat, while its temperature remains relatively stable. This property makes PCMs have important application value in the fields of thermal energy storage and temperature regulation.

[0060] In some other embodiments of the present specification, the temperature regulating pipeline further comprises an intelligent monitoring and feedback system, and the intelligent monitoring and feedback system comprises a temperature sensor, a flow rate sensor, a pressure sensor and a data processing unit; The temperature sensor is used to monitor the temperature of the fluid medium in the temperature regulating pipeline in real time and transmit the temperature data to the data processing unit; The flow rate sensor is used to monitor the flow rate of the fluid medium in the temperature regulating pipeline in real time and transmit the flow rate data to the data processing unit; The pressure sensor is used to monitor the fluid pressure in the temperature regulating pipeline in real time and transmit the pressure data to the data processing unit; The data processing unit is used to receive data from the temperature sensor, flow rate sensor and pressure sensor, and determine whether the operating state of the temperature regulating pipeline is normal in combination with preset temperature, flow rate and pressure threshold ranges; When the data processing unit determines that the operating state of the temperature regulating pipeline is abnormal, the control module can automatically adjust the operating parameters of the power module according to the abnormality type, or send an alarm signal to prompt the operator to intervene; The intelligent monitoring and feedback system also includes a remote monitoring module, which can transmit the operating data of the temperature regulating pipeline to a remote monitoring center in real time and receive control instructions from the remote monitoring center to realize remote monitoring and management of the temperature regulating pipeline; The remote monitoring center can generate a real-time operation status report based on the operation data, and optimize and adjust the operation strategy of the temperature regulating pipeline according to the operation status report to further improve the operation efficiency and stability of the electrolytic cell temperature control device.

[0061] In some other embodiments of the present specification, the temperature regulating pipeline further includes a dynamic thermal management system, which is used to dynamically adjust the heat conduction efficiency and heat storage capacity of the temperature regulating pipeline according to the real-time heat demand of the aluminum electrolysis cell and the external energy supply; The dynamic thermal management system comprises: Heat conduction regulating unit: the heat conduction regulating unit is arranged on the inner wall of the temperature regulating pipeline, and is composed of a multi-layer composite material, including a basic heat conduction layer, a variable heat conduction layer and an intelligent regulating layer; The basic heat-conducting layer is used to provide a stable heat conduction foundation; The variable heat-conducting layer is composed of a temperature-responsive material, and its thermal conductivity can be automatically adjusted according to temperature changes, thereby increasing heat conduction efficiency at high temperatures and reducing heat conduction losses at low temperatures; The intelligent control layer is composed of an electrotropic thermal conductive material, and the control module can dynamically adjust the thermal conductivity of the intelligent control layer by applying different voltage or current signals, thereby further optimizing the heat conduction efficiency.

[0062] Basic thermal conductive layer: Material selection: The basic thermal conductive layer is usually composed of metal materials with high thermal conductivity (such as aluminum, copper) or high-performance thermal conductive composite materials (such as carbon fiber reinforced composite materials).

[0063] Function: Provide a stable heat conduction foundation to ensure the basic heat exchange efficiency between the fluid medium and the electrolytic cell. Even under extreme working conditions, the basic heat conduction layer can guarantee the minimum heat conduction performance.

[0064] Implementation method: The basic thermal conductive layer is fixed to the inner wall of the temperature regulating pipe by machining or coating process, with a thickness of about 1-3 mm. The specific thickness is determined according to actual needs and material properties.

[0065] Variable Thermal Conductivity Layer: Material selection: The variable thermal conductive layer is composed of smart materials that are temperature responsive, such as shape memory alloys (such as Nitinol) or temperature-sensitive polymer composites.

[0066] Function: Its thermal conductivity can automatically adjust according to temperature changes. When the temperature rises, the thermal conductivity of the material increases, thereby improving the efficiency of heat conduction; when the temperature drops, the thermal conductivity decreases to reduce heat conduction losses.

[0067] Implementation method: The variable thermal conductivity layer can be attached to the surface of the base thermal conductivity layer in the form of a coating or a film with a thickness of about 0.5-1.5 mm. For example, shape memory alloys undergo a phase change when a certain temperature is reached, thereby changing their microstructure and adjusting the thermal conductivity.

[0068] Intelligent control layer: Material selection: The intelligent control layer is composed of an electrothermal conductive material, such as a polymer composite material doped with conductive nanoparticles or an electrothermal conductive gel material.

[0069] Function: Dynamically adjust the thermal conductivity of the intelligent control layer by applying different voltage or current signals. For example, when heat conduction needs to be enhanced, the control module can apply a higher voltage to increase the thermal conductivity of the material; conversely, lowering the voltage can reduce the thermal conductivity.

[0070] Implementation: The intelligent control layer can be connected to the control module through electrodes. The electrodes can be thin metal layers (such as gold or silver) with a thickness of about 0.1-0.5mm. The control module accurately controls the thermal conductivity of the intelligent control layer through pulse voltage or current signals based on real-time monitored temperature data and heat demand.

[0071] In summary, the present invention realizes the energy balance control of the electrolytic cell, increases the life of the electrolytic cell, reduces power consumption, improves current efficiency, coordinates the heat dissipation on the side and top of the electrolytic cell, realizes flexible production control, increases the proportion of green electricity used in electrolytic aluminum, and reduces industry carbon emissions.

[0072] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0073] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A temperature control device for an electrolytic cell, characterized in that: It includes a control system and a cooling and heating system, wherein the control system includes a temperature regulating pipeline, a heating pipeline, a cooling pipeline, a power module and a control module, and the cooling and heating system includes a heating module and a cooling module; The temperature regulating pipeline is arranged in the temperature regulating area of ​​the outer wall of the tank shell of the aluminum electrolysis tank; wherein the temperature regulating area corresponds to the electrolyte melt area in the aluminum electrolysis tank; The heating pipeline is used to transport the heated fluid medium; The cooling pipeline is used to transport the cooled fluid medium; The heating module is used to heat the fluid medium; wherein the heating module includes an external gas turbine power generation tail gas waste heat utilization module, a thermal power generation waste heat utilization module, an electrolytic cell flue gas waste heat utilization module and a roasting chamber heating module; The cooling module is used to cool the fluid medium; wherein the cooling module includes an air cooling module and a water cooling module; The power module is connected to the temperature regulating pipeline, the heating pipeline and the cooling pipeline respectively; The control module is used to determine the heat change of the aluminum electrolytic cell, and based on the heat change, control the power module to transport the fluid medium heated by the heating module to the temperature regulating pipeline through the heating pipeline, or control the power module to transport the fluid medium cooled by the cooling module to the temperature regulating pipeline through the cooling pipeline.

2. The temperature control device of the electrolytic cell according to claim 1, characterized in that: The control module is used for: Calculate the heat change between the input heat of the aluminum electrolytic cell and the preset reference heat; When the amount of heat change is less than 0, controlling the power module to transport the fluid medium heated by the heating module to the temperature regulating pipeline through the heating pipeline; and / or reducing the flow rate of the fluid medium in the temperature regulating pipeline; When the heat change is greater than 0, the power module is controlled to transport the fluid medium cooled by the cooling module to the temperature regulating pipeline through the cooling pipeline; and / or the flow rate of the fluid medium in the temperature regulating pipeline is increased.

3. The temperature control device of the electrolytic cell according to claim 2, characterized in that: The control module is used for: Acquiring a first temperature of the aluminum electrolysis cell and a second temperature of the fluid medium in the temperature regulating pipeline; calculating a first temperature difference between the first temperature and the second temperature; Determining a convective heat transfer coefficient of the fluid medium in the temperature regulating pipeline based on the flow rate, dynamic viscosity, specific heat, density and heat transfer area magnification factor of the fluid medium in the temperature regulating pipeline; Determining an initial heat dissipation amount of the aluminum electrolysis cell based on the convection heat transfer coefficient, the first temperature difference, and a heat exchange area of ​​a cell body of the aluminum electrolysis cell; When the heat change is less than 0, obtaining a first target heat dissipation of the aluminum electrolysis cell based on the initial heat dissipation of the aluminum electrolysis cell and the heat change; Based on the first target heat dissipation, the heat supply module is controlled to heat the fluid medium; and / or the power module is controlled to reduce the flow rate of the fluid medium in the temperature regulating pipeline.

4. The temperature control device of the electrolytic cell according to claim 3, characterized in that: The control module is used for: When the heat change is greater than 0, a second target heat dissipation of the aluminum electrolysis cell is obtained based on the initial heat dissipation of the aluminum electrolysis cell and the heat change; Based on the second target heat dissipation, the cooling module is controlled to cool the fluid medium; and / or the power module is controlled to speed up the flow rate of the fluid medium in the temperature regulating pipeline.

5. The temperature control device of the electrolytic cell according to claim 4, characterized in that: The heat change is expressed by the following formula: ;in, is the heat change, To access heat, is the preset reference heat of the electrolytic cell, is the input voltage, To access the current, is the preset reference current, is a preset reference voltage; The convective heat transfer coefficient of the fluid medium in the temperature regulating pipeline is shown in the following formula: ;in, is the convective heat transfer coefficient, is the heat transfer area magnification factor, is the density, is the flow rate, is the specific heat, is the dynamic viscosity; The initial heat dissipation is shown in the following formula: ;in, is the initial heat dissipation, is the heat exchange area, is the first temperature, is the second temperature.

6. The temperature control device of the electrolytic cell according to claim 4, characterized in that: The controlling the heating module to heat the fluid medium based on the first target heat dissipation; and / or controlling the power module to reduce the flow rate of the fluid medium in the temperature regulating pipeline includes: Determine a second temperature difference between the current temperature of the aluminum electrolysis cell and a first preset temperature threshold; wherein the first preset temperature threshold is the maximum temperature of the aluminum electrolysis cell; When the second temperature difference is greater than a second preset temperature threshold, controlling the heating module to heat the fluid medium; and / or controlling the power module to reduce the flow rate of the fluid medium in the temperature regulating pipeline; When the second temperature difference is less than or equal to the second preset temperature threshold, the power module is controlled to reduce the flow rate of the fluid medium in the temperature regulating pipeline.

7. The temperature control device of the electrolytic cell according to claim 6, characterized in that: The method of controlling the cooling module to cool the fluid medium based on the second target heat dissipation; and / or controlling the power module to speed up the flow rate of the fluid medium in the temperature regulating pipeline includes: Determine a third temperature difference between the current temperature of the aluminum electrolysis cell and a third preset temperature threshold; wherein the third preset temperature threshold is the lowest temperature of the aluminum electrolysis cell; Determine a flow rate difference between a current flow rate of the fluid medium in the temperature regulating pipeline and a preset flow rate; wherein the preset flow rate is a maximum flow rate of the fluid medium in the temperature regulating pipeline; When the third temperature difference is greater than a fourth preset temperature threshold, and the flow rate difference is greater than a preset speed threshold, controlling the cooling module to cool the fluid medium; and / or controlling the power module to speed up the flow rate of the fluid medium in the temperature regulating pipeline; When the third temperature difference is greater than a fourth preset temperature threshold, and the flow rate difference is less than a preset flow rate threshold, controlling the cooling module to cool the fluid medium; When the third temperature difference is less than a fourth preset temperature threshold, and the flow rate difference is greater than a preset speed threshold, the power module is controlled to increase the flow rate of the fluid medium in the temperature regulating pipeline.

8. The temperature control device of the electrolytic cell according to claim 4, characterized in that: When the heat change is less than 0, obtaining a first target heat dissipation of the aluminum electrolysis cell based on the initial heat dissipation of the aluminum electrolysis cell and the heat change includes: Subtract the absolute value of the heat change from the initial heat dissipation to obtain the first target heat dissipation; When the heat change is greater than 0, obtaining a second target heat dissipation of the aluminum electrolysis cell based on the initial heat dissipation of the aluminum electrolysis cell and the heat change includes: The initial heat dissipation is added to the heat change to obtain the second target heat dissipation.

9. The temperature control device of the electrolytic cell according to claim 1, characterized in that: The temperature regulating pipeline includes a plurality of sub-pipelines; The sub-pipelines are arranged longitudinally, and the heads and tails of the sub-pipelines are connected in sequence; The uppermost sub-pipeline among the sub-pipelines is used as an input pipeline for the fluid medium; The sub-pipeline located at the bottom of each of the sub-pipelines serves as an output pipeline for the fluid medium; The number of the control systems is two; One of the temperature regulating pipelines is arranged at half of the length direction of the temperature regulating area; The other temperature regulating pipeline is arranged at the other half of the length direction of the temperature regulating area.

10. The temperature control device of the electrolytic cell according to claim 1, characterized in that: The temperature control device is used to receive electric energy provided by green electricity energy and electric energy provided by gas-fired power generation energy; When the power generation of the green electric energy is greater than or equal to the preset power threshold, the temperature control device receives the electric energy provided by the green electric energy; When the power generation of the green electric energy is less than the preset power threshold, the temperature control device receives the electric energy provided by the gas-fired power generation energy.

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