Temperature regulating device for electrolytic cell

Abstract

The application provides a temperature regulating device of an electrolytic cell, which comprises a temperature regulating pipeline arranged on a temperature regulating area of an outer sidewall of a cell shell of the electrolytic cell; a heating pipeline for conveying heated fluid medium; a cooling pipeline for conveying cooled fluid medium; a heat supply module for heating the fluid medium; a cooling supply module for cooling the fluid medium; and a control module for judging an energy change amount of the electrolytic cell, and based on the energy change amount, controlling a power module to convey the fluid medium heated by the heat supply module to the temperature regulating pipeline through the heating pipeline, or controlling the power module to convey the fluid medium cooled by the cooling supply module to the temperature regulating pipeline through the cooling pipeline, so as to accurately regulate and control the temperature of the electrolytic cell, improve the utilization rate of new energy, use the waste heat of an energy production plant to regulate and control the electrolytic cell, simultaneously consume unstable green energy power, realize stable and efficient production of an electrolysis process, and reduce carbon emission.

Description

Technical Field

[0001] This invention relates to the field of electrolytic aluminum and aluminum-based alloys, and more particularly to a temperature control device for an electrolytic cell. (This application claims priority to patent application No. 202510157190.6, filed on February 13, 2025.) Background Technology In the field of aluminum electrolysis, the production process consumes a large amount of electricity, primarily relying on thermal power generation, making it a major source of carbon emissions in the non-ferrous metals industry. With the increasing global demand for reducing carbon emissions and promoting a green energy transition, the aluminum electrolysis industry faces the challenge of reducing energy consumption and carbon emissions. For aluminum electrolysis producers, indirect greenhouse gas emissions from fossil fuel power generation are one of their largest sources of greenhouse gas emissions, and reducing the proportion of electricity generated from fossil fuel power generation is the most significant opportunity to reduce carbon emissions. Therefore, maximizing the use of green electricity is currently the most effective measure for carbon reduction in the aluminum electrolysis industry.

[0002] Traditional aluminum electrolysis production requires the electrolytic cell to be maintained within a narrow "thermal equilibrium" temperature range to ensure high production efficiency and low energy consumption. However, the volatility of renewable energy power can significantly and adversely affect the thermal balance control of existing electrolytic cells, potentially leading to substantial safety hazards. Under stable production conditions, a moderately thick solid electrolyte protective layer is needed on the refractory material on the side of the electrolytic cell to protect it from the erosion of high-temperature, highly corrosive molten salts and ensure the service life of the electrolytic cell. If the energy input to the electrolytic cell per unit time exceeds the sum of the cell's heat dissipation and the energy required to complete the electrochemical reaction, the electrolytic cell will overheat, the side solid electrolyte protective layer will melt, and the risk of leakage will increase. Conversely, if the electrolytic cell becomes too cold, the thickness of the side solid electrolyte protective layer will increase, the viscosity of the electrolyte melt will increase, the solubility of alumina will decrease, and the electrolysis process will not proceed stably.

[0003] Under production conditions that consume a high proportion of green electricity, in order to maintain the energy balance of the electrolytic cell, it is necessary to redesign the structure of the electrolytic cell and adjust its energy balance. Previous methods for adjusting the heat dissipation of the cell shell sidewalls include: Patent application CN111690952A, a flexible production device for aluminum electrolytic cells, which adjusts the cell shell temperature through side-mounted blowpipes; Patent application CN117488367A, a flexible production energy control device for aluminum electrolytic cells, which adjusts heat dissipation by installing a heat exchange device on the outer wall of the aluminum electrolytic cell shell; and Patent application CN118704045A, a heat balance adjustment device and method for aluminum electrolytic cells, which adjusts the heat dissipation of the cell shell sidewalls by setting a heat flow adjustment device in the space between adjacent cradle stiffeners.

[0004] However, existing electrolytic cell structures and publicly available thermal balance control technologies have some limitations. For example, when the load at the input end of the electrolytic cell is insufficient, existing electrolytic cells, due to their heat dissipation design, cannot effectively maintain temperature when the input energy per unit time is severely insufficient. Or, when the load at the input end of the electrolytic cell significantly exceeds its energy requirements, when heat dissipation is enhanced by adjusting the heat dissipation on the side of the electrolytic cell, it is often achieved by side blowing and only considers simple modes such as airflow volume, neglecting the technical solution of using external heat or cold sources to regulate the temperature of the electrolytic cell in an undercooled or overheated state, so as to quickly establish a new thermal balance. Summary of the Invention

[0005] This invention provides a temperature control device for an electrolyzer, which solves the technical problem in the prior art that the temperature of the electrolyzer cannot be accurately and effectively controlled under the condition of consuming a high proportion of green electricity.

[0006] This invention provides a temperature control device for an electrolytic cell, comprising a control system and a cooling and heating system. The control system includes a temperature regulating pipeline, a heating pipeline, a cooling pipeline, a power module, and a control module. The cooling and heating system includes a heating module and a cooling module. The temperature regulating pipeline is located in the temperature regulating area on the outer wall of the electrolytic cell shell; wherein, the temperature regulating area corresponds to the melt zone inside the electrolytic cell; The heating pipeline is used to transport the heated fluid medium; The cooling pipes are 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 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-cooled module and a water-cooled module; The power module is connected to the temperature regulation pipeline, the heating pipeline and the cooling pipeline respectively; The control module is used to determine the energy change of the electrolytic cell, and based on the energy 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 the present invention, a temperature control device for an electrolytic cell is provided, wherein the control module is used for: Calculate the energy change between the input energy of the electrolyzer per unit time and the preset reference energy that ensures the electrolyzer maintains thermal balance; When the energy change is less than 0, the power module is controlled to transport the fluid medium heated by the heating module to the temperature regulating pipeline through the heating pipeline; and / or reduce the flow rate of the fluid medium in the temperature regulating pipeline; When the energy 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 increase the flow rate of the fluid medium in the temperature regulating pipeline.

[0008] According to the present invention, a temperature control device for an electrolytic cell is provided, wherein the control module is used for: The first temperature of the electrolytic cell and the second temperature of the fluid medium in the temperature regulating pipeline are obtained; Calculate the 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; Based on the convective heat transfer coefficient, the first temperature difference, and the heat transfer area of ​​the side of the electrolytic cell, the initial heat dissipation of the side of the electrolytic cell when it reaches thermal equilibrium is determined. When the energy change is less than 0, the first target heat dissipation of the electrolytic cell is obtained based on the initial heat dissipation of the side of the electrolytic cell when it reaches thermal equilibrium and the energy change. Based on the first target heat dissipation, the heating 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 the present invention, a temperature control device for an electrolytic cell is provided, wherein the control module is used for: When the energy change is greater than 0, the second target heat dissipation of the electrolytic cell is obtained based on the initial heat dissipation of the side of the electrolytic cell and the energy 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 increase the flow rate of the fluid medium in the temperature regulating pipeline.

[0010] According to the present invention, the temperature control device for an electrolytic cell, wherein the energy change is expressed by the following formula: ; in, It is the change in energy. The input energy for the electrolytic cell, The preset baseline energy required for the electrolyzer to reach a new thermal equilibrium. To enable real-time voltage input, To allow for real-time current input, To preset the reference current, The preset reference voltage is t, and time is t. The initial heat dissipation of the side is shown by the following formula: ; in, This represents the initial heat dissipation from the side. For heat exchange area, The first temperature, The second temperature, The convective heat transfer coefficient of the fluid medium in the temperature regulating pipeline; The convective heat transfer coefficient is obtained through the following process: Obtain the flow rate of the fluid medium in the temperature control pipeline; By consulting a pre-built database that stores the mapping relationship between fluid medium flow velocity and convective heat transfer coefficient, the convective heat transfer coefficient corresponding to the current fluid medium flow velocity can be obtained.

[0011] According to the present invention, a temperature control device for an electrolytic cell includes controlling the heating module to heat the fluid medium based on a first target heat dissipation; and / or controlling the power module to reduce the flow rate of the fluid medium in the temperature control pipeline, comprising: Determine a second temperature difference between the current temperature of the electrolytic cell and a first preset temperature threshold; wherein the first preset temperature threshold is the highest temperature of the electrolytic cell; When the second temperature difference is greater than the second preset temperature threshold, the heating 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; 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 the present invention, a temperature control device for an electrolytic cell, wherein the step of controlling the cooling fluid medium of the cooling module based on the second target heat dissipation and / or controlling the power module to accelerate the flow rate of the fluid medium in the temperature control pipeline includes: A third temperature difference is determined between the current temperature of the electrolytic cell and a third preset temperature threshold; wherein the third preset temperature threshold is the lowest temperature of the electrolytic cell. Determine the velocity difference between the current flow rate of the fluid medium in the temperature regulating pipeline and the preset flow rate; wherein, the preset flow rate is the maximum flow rate of the fluid medium in the temperature regulating pipeline; 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 is controlled to cool the fluid medium; and / or the power module is controlled to accelerate the flow rate of the fluid medium in the temperature regulating pipeline. When the third temperature difference is greater than the fourth preset temperature threshold and the flow rate difference is less than the preset speed threshold, the cooling module is controlled 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 is controlled to accelerate 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 energy change is less than 0, obtaining a first target heat dissipation of the electrolytic cell based on the initial heat dissipation of the side of the electrolytic cell and the energy change includes: The first target heat dissipation is obtained by subtracting the absolute value of the energy change from the initial heat dissipation of the side portion. When the energy change is greater than 0, the second target heat dissipation of the electrolytic cell is obtained based on the initial heat dissipation of the side of the electrolytic cell and the energy change, including: The second target heat dissipation is obtained by adding the initial heat dissipation on the side to the energy change.

[0014] According to the present invention, a temperature control device for an electrolytic cell is provided, wherein the temperature control pipeline includes multiple sub-pipelines; Each of the sub-pipelines is arranged longitudinally, and the beginning and end of each of the sub-pipelines are connected sequentially; The uppermost sub-pipeline in each of the aforementioned sub-pipelines serves as the input pipeline for the fluid medium; The lowest sub-pipeline in each of the aforementioned sub-pipelines serves as the output pipeline for the fluid medium; The number of control systems is two; One of the temperature regulating pipes is located at half the length of the temperature regulating area; Another temperature regulating conduit is located on the other half of the length of the temperature regulating area.

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

[0016] The temperature control device for an electrolytic cell provided by this invention includes a heating module for heating the fluid medium; wherein the heating module may include an external gas turbine generator exhaust 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. A cooling module is used to cool the fluid medium; wherein the cooling module may include an air-cooled module and a water-cooled module. A control module is used to determine the energy change of the electrolytic cell and, based on the energy change, controls the power module to transport the heated fluid medium from the heating module to the temperature regulating pipeline via a heating pipeline, or controls the power module to transport the cooled fluid medium from the cooling module to the temperature regulating pipeline via a cooling pipeline. Through independent control and cooling / heating systems, precise temperature control of the electrolytic cell can be achieved, ensuring that the electrolysis process takes place under optimal temperature conditions, improving electrolysis efficiency and product quality. Furthermore, by utilizing waste heat and the cooling system, it can adapt to the fluctuations in new energy power generation, achieving flexible production of the electrolytic cell, improving the utilization rate of new energy, and also contributing to the reduction of carbon emissions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[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 schematic diagram of the structure of the temperature control device for the electrolytic cell provided in this embodiment of the invention; Figure 3 This is the third schematic diagram of the structure of the temperature control device for the electrolytic cell provided in this embodiment of the invention; Figure 4 This is the fourth schematic diagram of the structure of the temperature control device for the electrolytic cell provided in this embodiment of the invention; Figure 5 This is a schematic diagram illustrating an application scenario of the temperature control device for an electrolytic cell provided in an embodiment of the present invention. Figure 6 This is a schematic diagram illustrating the principle of the heat transfer process provided in an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this 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 schematic diagram of the structure of the temperature control device for the electrolytic cell provided in this embodiment of the invention; Figure 3 This is the third schematic diagram of the structure of the temperature control device for the electrolytic cell provided in this embodiment of the invention; Figure 4 This is the fourth schematic diagram of the structure of the temperature control device for the electrolytic cell provided in this embodiment of the invention; Figure 5 This is a schematic diagram illustrating an application scenario of the temperature control device for an electrolytic cell provided in an embodiment of the present invention. Figure 6 This is a schematic diagram of the heat transfer process provided in an embodiment of the present invention.

[0021] Electrolytic cells can be either aluminum-silicon electrolytic cells or aluminum electrolytic cells. New energy power generation exhibits characteristics such as volatility, seasonality, and randomness. When electrolytic cells are connected to green electricity, they are affected by the volatility of new energy sources. To ensure the stable operation of electrolytic cells, it is necessary to utilize the coupling peak-shaving between grid power, gas-fired power generation, and wind power, establish an independent electrical control center, conduct internal load allocation, and realize functions such as power balance control, system operation optimization, power quality management, and economic analysis.

[0022] In this invention, the power system regulation mode is as follows: 1. Prioritize the absorption of wind power load, adopting a multi-generation and multi-use approach, and strictly controlling wind loss. 2. Thermal power generation operates at full capacity when the installed capacity allows, absorbing sufficient load (gas-fired power generation is used for peak shaving during peak periods, resulting in faster regulation response); however, due to planned maintenance or unplanned outages causing load gaps during its operating cycle, the regulation speed is slow, requiring transitional regulation from the grid. 3. The grid, as a fast-response load, performs transitional regulation, absorbing as little grid load as possible to reduce grid connection costs. 4. The control center comprehensively considers factors such as power system safety and stability, load regulation capacity, and economic efficiency. When load supply cannot meet actual production needs, it must coordinate load reduction to ensure stable production and power system operation.

[0023] System Energy Compensation and Comprehensive Utilization: When the green electricity input energy of the electrolyzer decreases, it is necessary to compensate for the reduced energy to ensure stable operation of the electrolyzer. In this invention, adjustments can be made in two aspects: increasing the input energy and reducing heat loss from the electrolyzer. Specifically, gas-fired power generation can be used to supply power to the electrolyzer, supplementing the reduced green electricity input. The waste heat from the gas-fired power generation can be used to heat the fluid medium in the pipeline. After flow and temperature regulation, the fluid medium is sent into the temperature regulating pipeline 301 on the side wall of the electrolyzer, continuously attaching the high-temperature fluid medium to the side of the electrolyzer, ensuring efficient heat preservation of the side of the electrolyzer, which can improve the peak-shaving capacity of the electrolyzer and make full use of energy. Similarly, when the energy input of green electricity to the electrolytic cell 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 lowers 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, carrying away the heat of the electrolytic cell, ensuring efficient heat dissipation of the electrolytic cell and ensuring stable operation of the electrolytic cell.

[0024] In this invention, such as Figure 5 As shown, the wind turbine can generate electricity and supply power to the grid. Natural gas can be used as an energy source, mixed with air in the combustion chamber for combustion, generating heat. The compressor can be used to compress gases such as natural gas or air. The waste heat recovery device can recover the heat energy from the turbine and gas turbine and use it to heat the fluid medium. The waste heat recovery device can also be considered as a heating module 401. Driven by the generator (which can be considered as a power module 304), the fluid medium can enter the temperature regulating pipeline 301 to 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 purified gas can be stored or discharged. There can be multiple electrolytic cells (containing molten aluminum and electrolyte), for example, it can include electrolytic cell 1, electrolytic cell 2, electrolytic cell 3, and electrolytic cell 4, etc. Valves can control the flow rate of the heated fluid medium and the flow rate of the cooled fluid medium.

[0025] See 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] Temperature regulating pipe 301 is installed in the temperature regulating area on the outer wall of the electrolytic cell shell; wherein, the temperature regulating area corresponds to the melt area inside the electrolytic cell.

[0027] Heating pipe 302 is used to transport heated fluid medium.

[0028] Cooling pipe 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 generator exhaust 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, etc. It can be understood that after the heating module 401 heats the fluid medium, it can be delivered 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; it may include air-cooled and water-cooled modules. Alternatively, it may include a natural air module to directly introduce natural air for cooling. After cooling the fluid medium, the cooling module 402 can deliver it to the cooling pipe 303. A controllable valve is installed between the cooling module 402 and the cooling pipe 303.

[0031] The power module 304 is connected to the temperature regulating pipe 301, the heating pipe 302, and the cooling pipe 303, respectively. The power module 304 can be a motor. A controllable valve can also be installed between the power module 304 and the heating pipe 302, and another controllable valve can be installed between the power module 304 and the cooling pipe 303. The fluid medium flowing out of the temperature regulating pipe 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 energy change of the electrolytic cell, and based on the energy 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 generator exhaust 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-cooled module and a water-cooled module. The control module 305 is used to determine the energy change of the electrolytic cell, and based on the energy 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, through an independent control system 30 and a cooling and heating system 40, can achieve precise temperature control of the electrolytic cell, ensuring that the electrolysis process is carried out under optimal temperature conditions, improving electrolysis efficiency and product quality. It also utilizes waste heat and a cooling system, which can adapt to the fluctuations in new energy power generation, realize flexible production of the electrolytic cell, improve the utilization rate of new energy, and also help reduce carbon emissions.

[0034] In one embodiment of this specification, the control module 305 is used for: Calculate the energy change between the input energy of the electrolyzer per unit time and the preset reference energy that ensures the electrolyzer maintains thermal balance; When the energy change is less than 0, the control power module 304 delivers the fluid medium heated by the heating module 401 to the temperature regulating pipeline 301 through the heating pipeline 302; and / or reduces the flow rate of the fluid medium in the temperature regulating pipeline 301. When the energy change is greater than 0, the control power module 304 delivers 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 energy change is less than 0, it indicates that the electrolytic cell needs to be kept warm. When the energy change is greater than 0, it indicates that the electrolytic cell needs to be cooled. By calculating the energy change between the input energy and the preset reference energy (i.e., the heat generated by the reference voltage and reference current under normal operation of the electrolytic cell), the operation of the heating and cooling modules 402 can be dynamically adjusted to adapt to the temperature requirements of the electrolytic cell and achieve more precise heat management. Furthermore, the electrolytic cell can be heated or cooled by adjusting the flow rate and / or temperature of the fluid medium. That is, the electrolytic cell can be heated or cooled through multiple control methods, which is very flexible and can better adapt to the actual working requirements of the electrolytic cell.

[0036] In one embodiment of this specification, the control module 305 is used for: The first temperature of the electrolytic cell and the second temperature of the fluid medium in the temperature regulating pipeline 301 are obtained; Calculate the temperature difference between the first temperature and the second temperature. Determine the convective heat transfer coefficient of the fluid medium in the temperature regulating pipe 301; Based on the convective heat transfer coefficient, the first temperature difference, and the heat transfer area on the side of the electrolytic cell, the initial heat dissipation on the side of the electrolytic cell when it reaches thermal equilibrium is determined. When the energy change is less than 0, the first target heat dissipation of the electrolytic cell is obtained based on the initial heat dissipation of the side of the electrolytic cell when it reaches thermal equilibrium and the energy change. Based on the first target heat dissipation, 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.

[0037] In this embodiment, the heat exchange area of ​​the tank can refer to the temperature regulation area on the outer wall of the tank shell. By calculating the first temperature difference and the convective heat transfer coefficient, the initial heat dissipation on the side can be determined more accurately, enabling precise control of the heat dissipation of the electrolytic cell and ensuring the temperature stability of the electrolytic cell under different operating conditions. By optimizing the flow rate and temperature of the fluid medium, 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 for: When the energy change is greater than 0, the second target heat dissipation of the electrolytic cell is obtained based on the initial heat dissipation of the side of the electrolytic cell and the energy 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 increase 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, a rapid response to heat changes can be achieved, increasing heat dissipation, protecting the electrolytic cell from overheating damage, and improving production safety and stability. By adjusting the flow rate of the fluid medium, the heat dissipation effect can be optimized, ensuring stable operation of the electrolytic cell under high current conditions.

[0040] In one embodiment, the energy change is expressed by the following formula: (1); in, It is the change in energy. The input energy for the electrolytic cell, The preset baseline energy required for the electrolyzer to reach a new thermal equilibrium. To enable real-time voltage input, To allow for real-time current input, To preset the reference current, The preset reference voltage is t, and time is t.

[0041] In this embodiment, a preset reference energy is used. It consists of two parts: the energy required to complete the electrochemical reaction, and the heat dissipated to maintain the thermal equilibrium of the electrolyzer for stable production. This dissipated heat comprises the total heat dissipation in the three dimensions of the electrolyzer, but for the safe and stable production of the electrolyzer, controlling the initial heat dissipation from the side is most important. Therefore, a preset baseline energy can be used... It can be broken down into the following three components: (2); in, The energy required to complete an electrochemical reaction This represents the initial heat dissipation from the side of the electrolytic cell. This refers to the heat dissipation at locations other than the side of the electrolytic cell.

[0042] In the above formula, the magnitudes of the three energy components are all related to the input energy. Size-related, specifically satisfying: (3); (4); (5); The sum of coefficients α, β, and γ is 1. Specifically, The value typically ranges from 0.4 to 0.55. The value typically ranges from 0.28 to 0.35. γ The value is usually between 0.15 and 0.25.

[0043] In this embodiment, the following can be used: To characterize the preset reference energy Among them, the preset reference voltage and preset reference current It is based on the energy balance calculation of the electrolyzer.

[0044] In practical applications, heat flux density can be measured on-site using a heat flux meter. The relationship between the convective heat transfer coefficient and the flow velocity of the fluid medium can be derived from the on-site measurement data. A database storing the mapping relationship between the flow velocity and the convective heat transfer coefficient can be established, thereby achieving the purpose of regulating the heat dissipation by controlling the flow velocity of the medium.

[0045] According to the heat transfer process over a flat wall in heat transfer physics, a typical heat transfer process includes three interconnected stages: heat exchange between the high-temperature fluid and the solid wall, heat conduction through the wall, and heat exchange between the low-temperature fluid and the solid wall on the other side. Figure 6 As shown, heat transfer Satisfy the following formula: (6); (7); (8); in, Heat transfer is measured in W. The heat transfer coefficient between the melt in the trough and the furnace walls, expressed in W / (m²). 2 ℃); This represents the electrolyte temperature in the tank, in °C. This is the initial crystallization temperature of the electrolyte, expressed in °C. This refers to the temperature of the tank sidewall, i.e., the first temperature, in °C. Thermal conductivity, in units of W / (m²). ℃); The thickness of the thermally conductive material, in meters (m). The heat transfer coefficient between the outer wall air and the tank sidewall is expressed in W / (m²). 2 ℃).

[0046] Under steady-state conditions, the heat flows calculated by the above three formulas should be equal.

[0047] A heat flow meter can be used to measure heat transfer. Then, the convective heat transfer coefficient of the outer wall can be calculated by formula (8). By measuring the heat transfer at different flow rates, a database containing the mapping relationship between fluid medium flow rate and convective heat transfer coefficient can be established, thereby achieving the purpose of controlling the heat dissipation by controlling the medium flow rate.

[0048] The initial heat dissipation from the side is shown in the following formula: (9); in, This represents the initial heat dissipation from the side. For heat exchange area, The first temperature, The second temperature, This is the convective heat transfer coefficient of the fluid medium in the temperature regulating pipeline.

[0049] In practical applications, the convective heat transfer coefficient can be obtained through the following process: First, obtain the flow rate of the fluid medium in the temperature control pipeline.

[0050] Then, by consulting a pre-built database that stores the mapping relationship between fluid medium flow rate and convective heat transfer coefficient, the convective heat transfer coefficient corresponding to the current fluid medium flow rate is obtained.

[0051] In this embodiment, based on the above formulas, the control system 30 can accurately calculate and adjust the heat supply and heat dissipation, improving the accuracy and reliability of temperature control. Standardized calculations of heat and convective heat transfer coefficients simplify the operation of the control system 30, reduce human error, and improve system stability and reliability. All parameters used in the above formulas are known in advance.

[0052] In one embodiment of this specification, based on a first target heat dissipation, 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, including: Determine a second temperature difference between the current temperature of the electrolytic cell and a first preset temperature threshold; wherein the first preset temperature threshold is the highest temperature of the electrolytic 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 control power module 304 reduces the flow rate of the fluid medium in the temperature regulation pipeline 301.

[0053] 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 be further 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 be further increased, 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 excessively high temperatures in the electrolytic cell, ensures the continuity and stability of the electrolysis process, and allows for flexible selection of control methods based on the actual working conditions of the electrolytic cell, ensuring that the working temperature of the electrolytic cell is always within a reasonable range. Both the first preset temperature threshold and the second preset temperature threshold can be set.

[0054] In one embodiment of this specification, based on a second target heat dissipation, the cooling module 402 is controlled to cool the fluid medium; and / or the power module 304 is controlled to increase the flow rate of the fluid medium in the temperature regulating pipe 301, including: Determine a third temperature difference between the current temperature of the electrolytic cell and a third preset temperature threshold; wherein the third preset temperature threshold is the lowest temperature of the electrolytic cell. Determine the velocity difference between the current flow rate and the preset flow rate of the fluid medium in the temperature regulating pipeline 301; wherein, the preset flow rate is the 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 accelerate the 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 less than the preset speed threshold, the cooling module 402 is controlled 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 control power module 304 accelerates the flow rate of the fluid medium in the temperature regulating pipeline 301.

[0055] In this embodiment, a third temperature difference greater than a fourth preset temperature threshold indicates that the temperature of the electrolytic cell can continue to decrease. A flow rate difference greater than a preset speed threshold indicates that the flow rate can continue to increase. By comprehensively considering both temperature and flow rate differences, the cooling supply and fluid medium flow rate can be controlled more flexibly to adapt to temperature changes in the electrolytic cell, improving the adaptability and flexibility of temperature control, preventing the electrolytic cell temperature from becoming too low, and preventing the fluid medium flow rate from becoming too high, thus ensuring the stable operation of the electrolytic cell. The third and fourth preset temperature thresholds 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 also be set.

[0056] In one embodiment of this specification, when the energy change is less than 0, a first target heat dissipation of the electrolytic cell is obtained based on the initial heat dissipation from the side of the electrolytic cell and the energy change, including: Subtract the absolute value of the energy change from the initial heat dissipation on the side to obtain the first target heat dissipation. When the energy change is greater than 0, based on the initial heat dissipation from the side of the electrolytic cell and the energy change, the second target heat dissipation of the electrolytic cell is obtained, including: The initial heat dissipation on the side is added to the energy change to obtain the second target heat dissipation.

[0057] In this embodiment, the method for obtaining the first target heat dissipation and the second target heat dissipation is very simple, and the target heat dissipation can be quickly adjusted, simplifying the heat adjustment process and improving the efficiency and response speed of temperature control.

[0058] Specifically, the initial heat dissipation on the side can be used express, ,in, The flow rate of the fluid medium before adjusting its velocity. The temperature before adjusting the temperature of the fluid medium. The primary target heat dissipation can be used... express, ,in, The flow rate after adjusting the velocity of the fluid medium. The temperature after adjusting the fluid medium's temperature. The heat difference between the initial target heat dissipation and the initial heat dissipation from the side can be used as... express, Generally speaking, it can be considered that... However, considering that the electrolytic cell can exchange heat not only through the temperature control zone and temperature control pipe 301, but also in other areas, it can be defined that... = , Indicates the heat dissipation constant of other parts. Represents the correction factor. and Both can be set according to the actual situation, and are considered known quantities. In other words, the heat difference between the initial target heat dissipation and the initial heat dissipation from the side equals the energy change minus... .

[0059] In one embodiment of this specification, the temperature regulating pipeline 301 includes multiple sub-pipelines; The sub-pipes are arranged longitudinally, and the beginning and end of each sub-pipe are connected sequentially. The uppermost sub-pipe in each sub-pipeline serves as the input pipe for the fluid medium; The lowest sub-pipe in each sub-pipeline serves as the output pipeline for the fluid medium.

[0060] In this embodiment, the design of multiple sub-pipelines enables a uniform temperature distribution on the sidewalls of the electrolytic cell, reducing the risk of localized overheating or overcooling and improving the stability and safety of the electrolytic cell. The number of sub-pipelines is not specifically limited; for example, it can be two, three, five, or more.

[0061] In one embodiment of this specification, the number of control systems 30 is two; A temperature regulating pipe 301 is located at half the length of the temperature regulating area; Another temperature regulating pipe 301 is located on the other half of the length of the temperature regulating area.

[0062] 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 uniformly, improving the uniformity and efficiency of temperature control. Through two independent control systems 30, independent temperature control can be performed for different areas of the electrolytic cell, enhancing the flexibility and adaptability of temperature control.

[0063] It is understood that the control system 30 may include a monitoring module, which 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. This invention is applicable not only to electrolytic cells but also to aluminum-silicon cells and other types of electrolytic cells, exhibiting strong versatility. This invention also does not limit the number of electrolytic cells; it can be one or more, such as four, six, or more.

[0064] The temperature control device 20 can also communicate with an electrical control center, which can display the operation process of the temperature control device 20. For example, the electrical control center can display the temperature and flow rate of the fluid medium obtained above, the temperature of the electrolytic cell, the operating voltage and current of the electrolytic cell, and various information such as the calculated initial heat dissipation on the side, energy change, first target heat dissipation, and second target heat dissipation.

[0065] In one embodiment of this specification, the temperature control device is used to receive electrical energy provided by green electricity and electrical energy provided by gas-fired power generation. When the power generation of green energy is greater than or equal to a preset power threshold, the temperature control device receives the electrical energy provided by the green energy. When the power generation of green energy is less than the preset power threshold, the temperature control device receives the electrical energy provided by the gas-fired power generation.

[0066] In this embodiment, a preset power threshold can be set. The temperature control device receives electrical energy provided by the green energy source and can be used to power the heating module, cooling module, and other modules. This invention utilizes waste heat from energy production plants to regulate the flexible production of molten salt electrolytic cells or molten salt electrocoeutectoid cells and to reduce carbon emissions in the electrochemical preparation process of metal or alloy molten salts. It involves the output coupling regulation between green electricity and fossil energy electricity, as well as the thermal balance control of novel molten salt electrolytic cells and molten salt electrocoeutectoid devices. While absorbing unstable green energy electricity, it achieves stable and efficient production and carbon emission reduction in the molten salt electrolysis and molten salt electrocoeutectoid processes.

[0067] In some other embodiments of this 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 includes a phase change material container and a heat exchanger. The phase change material container is filled with phase change material, which 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 delivery 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 electrolytic cell and the heating capacity of the heating module. When the heating capacity of the heating module exceeds the heat demand of the electrolytic cell, the control module controls the phase change energy storage unit to absorb the 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 capacity of the heating module, ensuring that the electrolytic cell temperature control device can continuously and stably provide the required heat to the electrolytic cell. The phase change energy storage unit also includes a temperature regulation device, which can preheat or cool the phase change material according to the phase change temperature range of the phase change material, so as to optimize the energy storage and release efficiency of the phase change energy storage unit. The temperature regulating device includes a heating element and a cooling element. The heating element is used to heat the phase change material when its temperature is below its phase change temperature range, and the cooling element is used to cool the phase change material when its temperature is above its phase change temperature range. The control module can intelligently control the operating status of the heating and cooling elements according to the real-time temperature of the phase change material and the heat demand of the electrolytic cell, so as to achieve precise temperature control of the phase change energy storage unit and further improve the flexibility and adaptability of the electrolytic cell temperature control device.

[0068] Phase change materials (PCMs) are substances that can undergo phase transitions (such as from solid to liquid or from liquid to gas) within a specific temperature range. During the phase transition, PCMs absorb or release a large amount of heat while maintaining a relatively stable temperature. This property makes PCMs valuable for applications in thermal energy storage and temperature regulation.

[0069] In some other embodiments of this specification, the temperature regulating pipeline further includes an intelligent monitoring and feedback system, which includes 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 regulation 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, in conjunction with preset temperature, flow rate and pressure threshold ranges, determine whether the operating status of the temperature regulating pipeline is normal. When the data processing unit determines that the operating status of the temperature regulating pipeline is abnormal, the control module can automatically adjust the operating parameters of the power module according to the type of abnormality, or issue 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 the remote monitoring center in real time and receive control commands from the remote monitoring center to realize remote monitoring and management of the temperature regulating pipeline. The remote monitoring center can generate real-time operation status reports based on the operation data, and optimize and adjust the operation strategy of the temperature regulation pipeline according to the operation status reports, so as to further improve the operation efficiency and stability of the electrolytic cell temperature control device.

[0070] In some other embodiments of this 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 electrolytic cell and the external energy supply. The dynamic thermal management system includes: Heat conduction regulating unit: The heat conduction regulating unit is disposed on the inner wall of the temperature regulating pipeline and is composed of multiple layers of composite material, including a basic heat conduction layer, a variable heat conduction layer and an intelligent regulation layer; The basic thermally conductive layer is used to provide a stable foundation for heat conduction. The variable thermal conductivity layer is composed of a temperature-responsive material whose thermal conductivity can be automatically adjusted according to temperature changes, thereby increasing heat conduction efficiency at high temperatures and reducing heat conduction loss at low temperatures. The intelligent control layer is composed of electrovariable thermally conductive material. 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 transfer efficiency.

[0071] Basic thermal conductive layer: Material selection: The base thermal conductive layer is usually made of metal materials with high thermal conductivity (such as aluminum and copper) or high-performance thermally conductive composite materials (such as carbon fiber reinforced composite materials).

[0072] Function: Provides a stable thermal conductivity base, ensuring basic heat exchange efficiency between the fluid medium and the electrolytic cell. Even under extreme conditions, the base thermally conductive layer guarantees minimum thermal conductivity.

[0073] Implementation method: The basic heat-conducting layer is fixed to the inner wall of the temperature regulating pipeline through mechanical processing or coating process, with a thickness of about 1-3mm. The specific thickness is determined according to actual needs and material properties.

[0074] Variable thermal conductivity layer: Material selection: The variable thermal conductivity layer is composed of smart materials with temperature responsiveness, such as shape memory alloys (e.g., nickel-titanium alloys) or temperature-sensitive polymer composites.

[0075] Function: Its thermal conductivity can automatically adjust according to temperature changes. When the temperature rises, the thermal conductivity of the material increases, thereby improving heat transfer efficiency; when the temperature drops, the thermal conductivity decreases to reduce heat transfer loss.

[0076] Implementation: The variable thermal conductivity layer can be attached to the surface of the base thermal conductivity layer in the form of a coating or thin film, with a thickness of approximately 0.5-1.5 mm. For example, shape memory alloys undergo a phase transition when a specific temperature is reached, thereby changing their microstructure and thus adjusting their thermal conductivity.

[0077] Intelligent control layer: Material selection: The smart control layer is composed of electrochromic thermally conductive materials, such as polymer composites doped with conductive nanoparticles or electrochromic thermally conductive gel materials.

[0078] Function: By applying different voltage or current signals, the thermal conductivity of the intelligent control layer can be dynamically adjusted. For example, when enhanced heat conduction is needed, the control module can apply a higher voltage to increase the thermal conductivity of the material; conversely, reducing the voltage can decrease the thermal conductivity.

[0079] Implementation: The intelligent control layer can be connected to the control module via electrodes, which can be thin metal layers (such as gold or silver) with a thickness of approximately 0.1-0.5 mm. The control module precisely regulates the thermal conductivity of the intelligent control layer using pulse voltage or current signals based on real-time monitored temperature data and heat demand.

[0080] In summary, this invention achieves energy balance control of the electrolytic cell, improves the cell's lifespan, reduces power consumption, increases current efficiency, coordinates the heat dissipation of the sides and top of the electrolytic cell, realizes flexible production control, increases the proportion of green electricity used in aluminum electrolysis, and reduces carbon emissions in the industry.

[0081] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0082] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate 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. The control system includes temperature regulating pipelines, heating pipelines, cooling pipelines, a power module, and a control module. The cooling and heating system includes a heating module and a cooling module. The temperature regulating pipeline is located in the temperature regulating area on the outer wall of the electrolytic cell shell; wherein, the temperature regulating area corresponds to the melt zone inside the electrolytic cell; The heating pipeline is used to transport the heated fluid medium; The cooling pipes are 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 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-cooled module and a water-cooled module; The power module is connected to the temperature regulation pipeline, the heating pipeline and the cooling pipeline respectively; The control module is used to determine the energy change of the electrolytic cell, and based on the energy 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 for an electrolytic cell according to claim 1, characterized in that, The control module is used for: Calculate the energy change between the input energy of the electrolyzer per unit time and the preset reference energy that ensures the electrolyzer maintains thermal balance; When the energy change is less than 0, the power module is controlled to transport the fluid medium heated by the heating module to the temperature regulating pipeline through the heating pipeline. And / or reduce the flow rate of the fluid medium in the temperature regulating pipeline; When the energy 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 increase the flow rate of the fluid medium in the temperature regulating pipeline.

3. The temperature control device for an electrolytic cell according to claim 2, characterized in that, The control module is used for: The first temperature of the electrolytic cell and the second temperature of the fluid medium in the temperature regulating pipeline are obtained; Calculate the 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; Based on the convective heat transfer coefficient, the first temperature difference, and the heat transfer area of ​​the side of the electrolytic cell, the initial heat dissipation of the side of the electrolytic cell when it reaches thermal equilibrium is determined. When the energy change is less than 0, the first target heat dissipation of the electrolytic cell is obtained based on the initial heat dissipation of the side of the electrolytic cell when it reaches thermal equilibrium and the energy change. Based on the first target heat dissipation, the heating 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 for an electrolytic cell according to claim 3, characterized in that, The control module is used for: When the energy change is greater than 0, the second target heat dissipation of the electrolytic cell is obtained based on the initial heat dissipation of the side of the electrolytic cell and the energy 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 increase the flow rate of the fluid medium in the temperature regulating pipeline.

5. The temperature control device for an electrolytic cell according to claim 4, characterized in that, The change in energy is expressed by the following formula: ； in, It is the change in energy. The input energy for the electrolytic cell, The preset baseline energy required for the electrolyzer to reach a new thermal equilibrium. To enable real-time voltage input, To allow for real-time current input, To preset the reference current, The preset reference voltage is t, and time is t. The initial heat dissipation of the side is shown in the following formula: ； in, This represents the initial heat dissipation from the side. For heat exchange area, The first temperature, The second temperature, The convective heat transfer coefficient of the fluid medium in the temperature regulating pipeline; The convective heat transfer coefficient is obtained through the following process: Obtain the flow rate of the fluid medium in the temperature control pipeline; By consulting a pre-built database that stores the mapping relationship between fluid medium flow velocity and convective heat transfer coefficient, the convective heat transfer coefficient corresponding to the current fluid medium flow velocity can be obtained.

6. The temperature control device for an electrolytic cell according to claim 4, characterized in that, The step of 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 electrolytic cell and a first preset temperature threshold; wherein the first preset temperature threshold is the highest temperature of the electrolytic cell; When the second temperature difference is greater than the second preset temperature threshold, the heating 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; 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 for an electrolytic cell according to claim 6, characterized in that, The step of controlling the cooling module to cool the fluid medium based on the second target heat dissipation, and / or controlling the power module to increase the flow rate of the fluid medium in the temperature regulating pipeline, includes: A third temperature difference is determined between the current temperature of the electrolytic cell and a third preset temperature threshold; wherein the third preset temperature threshold is the lowest temperature of the electrolytic cell. Determine the velocity difference between the current flow rate of the fluid medium in the temperature regulating pipeline and the preset flow rate; wherein, the preset flow rate is the maximum flow rate of the fluid medium in the temperature regulating pipeline; 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 is controlled to cool the fluid medium; and / or the power module is controlled to accelerate the flow rate of the fluid medium in the temperature regulating pipeline. When the third temperature difference is greater than the fourth preset temperature threshold and the flow rate difference is less than the preset speed threshold, the cooling module is controlled 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 is controlled to accelerate the flow rate of the fluid medium in the temperature regulating pipeline.

8. The temperature control device for an electrolytic cell according to claim 4, characterized in that, When the energy change is less than 0, the first target heat dissipation of the electrolytic cell is obtained based on the initial heat dissipation of the side of the electrolytic cell and the energy change, including: The first target heat dissipation is obtained by subtracting the absolute value of the energy change from the initial heat dissipation of the side portion. When the energy change is greater than 0, the second target heat dissipation of the electrolytic cell is obtained based on the initial heat dissipation of the side of the electrolytic cell and the energy change, including: The second target heat dissipation is obtained by adding the initial heat dissipation on the side to the energy change.

9. The temperature control device for an electrolytic cell according to claim 1, characterized in that, The temperature regulation pipeline includes multiple sub-pipelines; Each of the sub-pipelines is arranged longitudinally, and the beginning and end of each of the sub-pipelines are connected sequentially; The uppermost sub-pipeline in each of the aforementioned sub-pipelines serves as the input pipeline for the fluid medium; The lowest sub-pipeline in each of the aforementioned sub-pipelines serves as the output pipeline for the fluid medium; The number of control systems is two; One of the temperature regulating pipes is located at half the length of the temperature regulating area; Another temperature regulating conduit is located on the other half of the length of the temperature regulating area.

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

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