Electrolytic tank low-temperature flue gas waste heat utilization structure

Abstract

The invention relates to the technical field of flue gas waste heat utilization, and discloses an electrolytic bath low-temperature flue gas waste heat utilization structure which comprises a tank body, a base is fixedly connected to the outer wall of the tank body, a liquid inflow pipe is fixedly connected to the interior of the tank body, a liquid outflow pipe is fixedly connected to the interior of the tank body, and a flue gas inlet pipe is fixedly connected to the interior of the tank body. A flue gas outflow pipe is fixedly connected to the interior of the flue gas inlet pipe, and a heat exchange assembly is arranged in the tank body; the heat exchange assembly comprises a partition plate, and the outer wall of the partition plate is fixedly connected to the interior of the tank body. Flue gas is discharged into the tank body through the flue gas inlet pipe, the time of the flue gas in the tank body is longer through the spoilers, cold water flows into the liquid inflow pipe, the liquid flows into the U-shaped connecting pipe, liquid flows out of the other end of the U-shaped connecting pipe, and the liquid is discharged through the liquid outflow pipe, so that the efficient heat exchange effect is achieved, and the problems that when a plate heat exchanger is used, pipeline gaps are narrow, and the heat exchange efficiency is low are solved. The heat exchange efficiency is reduced, and the practicability of the waste heat utilization structure is improved.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas waste heat utilization, and in particular to a low-temperature flue gas waste heat utilization structure for an electrolytic cell. Background Art

[0002] The waste heat recovery technology of low-temperature flue gas from electrolyzers is of great significance for energy conservation and emission reduction in modern industry. Especially in the electrolytic production process, flue gas is an energy carrier that cannot be ignored. The waste heat recovery can not only effectively reduce energy consumption, but also reduce the negative impact on the environment and promote sustainable development.

[0003] The low-temperature flue gas of the electrolytic cell mainly comes from the chemical reaction and electrical energy conversion during the electrolysis process. During the aluminum electrolysis production process, the bauxite (Al2O3) in the electrolytic cell is reduced to aluminum metal through the electrolysis reaction, and a large amount of heat is generated in this process, and part of the heat is discharged into the atmosphere in the form of flue gas. The temperature of the low-temperature flue gas of the electrolytic cell is generally low, usually between 100℃ and 300℃. Although it is lower than the high-temperature flue gas, it still contains considerable thermal energy.

[0004] The composition of low-temperature flue gas from electrolyzers is relatively complex, mainly including the following substances: Nitrogen (N2) and oxygen (O2): These two gases are the main components of air. As one of the gases participating in the reaction during the electrolysis process, they will eventually be discharged into the atmosphere along with the flue gas.

[0005] Carbon dioxide (CO2): As a by-product of the electrolysis reaction, carbon dioxide is generated during the electrolysis process and is discharged along with the flue gas. Carbon dioxide is one of the greenhouse gases, and its emission has an impact on the environment that cannot be ignored.

[0006] Water vapor (H2O): Water vapor may also be released as a by-product in some electrolysis reactions, particularly when sodium hydroxide is used as the electrolyte.

[0007] Volatile substances and reaction by-products: During the electrolysis process, some reactants or products in the cell may be released in the form of volatilization and become harmful substances in the flue gas, such as fluoride, chloride, etc. If these substances are not treated, they will have adverse effects on the environment and human health.

[0008] Therefore, the composition of the low-temperature flue gas from the electrolyzer is diverse, and its emissions not only include recoverable heat energy, but may also contain harmful substances. This requires that while recovering heat energy, the flue gas must also be purified to avoid pollution to the environment.

[0009] At present, many electrolysis production plants still have the phenomenon of direct emission of low-temperature flue gas, resulting in a large amount of potential heat energy waste. The heat emitted by the low-temperature flue gas of the electrolyzer cannot usually be directly used for heating or steam generation in other links of the production process, thus becoming a huge waste of energy. Assuming that the low-temperature flue gas emission of an electrolyzer is 1,000 kg per hour, if heat recovery is not performed, this heat will be lost in vain, resulting in significant energy waste.

[0010] At the same time, direct emission of untreated flue gas may also pollute the environment. Carbon dioxide and other harmful substances in flue gas may have a negative impact on air quality, increase greenhouse gas emissions, and promote global climate change. In addition, if volatile substances and reaction by-products in flue gas are not treated, they may pose potential hazards to the ecosystem and the health of surrounding residents.

[0011] The core of waste heat recovery technology is to convert the heat energy in low-temperature flue gas into a usable form through appropriate processes and equipment to achieve heat reuse. There are mainly the following technical means for waste heat recovery of low-temperature flue gas in electrolyzers: 1. Heat exchanger technology Heat exchangers are one of the most common devices in waste heat recovery applications. Heat in flue gas can be transferred to water or other media through heat exchangers for heating or generating steam. Common heat exchangers include air-to-air heat exchangers, air-to-water heat exchangers, etc. For low-temperature flue gas, air-to-water heat exchangers are particularly suitable because water has a large specific heat capacity and can absorb a large amount of heat at a lower temperature.

[0012] 2. Flue gas cooling and steam heating By cooling the low-temperature flue gas and reducing its temperature to a suitable range, the cooled flue gas can be used to heat water or steam. Especially in production processes that require a large amount of steam or hot water, the low-temperature flue gas from the electrolyzer can be used as a supplement to external energy, reducing dependence on fossil fuels and reducing production costs.

[0013] 3. Heat pump technology Heat pump technology is a relatively advanced heat recovery method in recent years. Its principle is to extract low-temperature heat energy through a compressor and raise it to high temperature, thereby achieving effective energy conversion. Heat pumps can not only recover heat from low-temperature flue gas, but also improve the efficiency of heat energy use, and are widely used in various industrial fields.

[0014] 4. Flue gas purification and waste gas treatment The low-temperature flue gas from the electrolyzer may contain some environmentally harmful components, such as fluoride, chloride, etc. Therefore, flue gas purification is also required while flue gas recovery. Common purification technologies include activated carbon adsorption, dry desulfurization, wet desulfurization, etc. These technologies can effectively remove harmful components in flue gas and meet environmental emission standards.

[0015] 5. Intelligent monitoring and optimization system With the development of information technology, the application of intelligent monitoring and optimization systems in waste heat recovery is also increasing. These systems can monitor the temperature, flow rate, composition and other parameters of the flue gas in the electrolyzer in real time, and optimize the heat recovery process through intelligent algorithms to achieve the best energy utilization efficiency.

[0016] Waste heat recovery can not only bring significant economic benefits, but also promote industrial energy conservation and environmental protection. Specifically, waste heat recovery technology has the following benefits: Save energy and reduce costs. Through waste heat recovery, the heat in the low-temperature flue gas of the electrolyzer can be converted into useful energy, reducing the demand for external energy. Especially in industrial production processes that require a large amount of steam or hot water, using waste heat for preheating can significantly reduce fuel consumption and reduce production costs.

[0017] Improve comprehensive benefits. Waste heat recovery can not only save energy, but also improve production efficiency. By using the recovered heat to heat raw materials, maintain a suitable reaction temperature, etc., it can reduce temperature fluctuations in the production process and improve production stability and product quality.

[0018] Reduce greenhouse gas emissions and promote environmental protection. The low-temperature flue gas of the electrolyzer contains a certain amount of carbon dioxide. If it is directly discharged without treatment, it will aggravate the greenhouse effect. Through waste heat recovery, the emission of these harmful substances can be effectively reduced, the emission of greenhouse gases such as carbon dioxide can be reduced, and it will play a positive role in mitigating climate change.

[0019] Enhance the corporate social responsibility image. With the increasingly stringent environmental laws and regulations and the improvement of the public's environmental awareness, the use of waste heat recovery technology is not only in line with environmental protection policies, but also can enhance the corporate social responsibility image and enhance the company's market competitiveness.

[0020] The waste heat recovery technology of low-temperature flue gas from electrolyzers is an important part of modern industrial energy conservation and emission reduction. Through reasonable technical means and equipment, it can not only effectively recover the heat in the low-temperature flue gas of electrolyzers, but also reduce greenhouse gas emissions, reduce energy consumption, and enhance the economic benefits and social image of enterprises. With the continuous advancement of technology, the waste heat recovery system will become more intelligent and efficient in the future, and become an indispensable part of industrial production.

[0021] The existing technology uses waste heat utilization structures for low-temperature flue gas from electrolyzers. The first is the flue system, which can guide the flow of low-temperature flue gas, and its pipe material must be resistant to high temperatures and well sealed. The second is heat exchange equipment, such as a heat exchanger, which allows flue gas to exchange heat with other media. The third is waste heat utilization terminal equipment, such as a heat station that can distribute and utilize recovered heat, and if there is a need for power generation, it will also be equipped with a generator set. In addition, there are circulating pumps to promote medium circulation, fans to assist flue gas flow, and insulation structures to reduce heat loss, etc. All parts work together to achieve efficient waste heat recovery.

[0022] In the prior art, if the plate heat exchanger is usually used in the waste heat utilization structure of the low-temperature flue gas of the electrolytic cell, there will be some disadvantages. The seals of the plate heat exchanger are prone to aging and wear. Under the complex working conditions of long-term operation in the flue gas of the electrolytic cell, the sealing performance is difficult to maintain for a long time, resulting in medium leakage, affecting the normal operation of the system and the safety of the surrounding environment. Its flow channel is narrow. If there are impurity particles or scaling substances in the flue gas of the electrolytic cell, it is very easy to cause blockage of the flow channel, which greatly reduces the heat exchange efficiency and increases the cost and frequency of cleaning and maintenance. Moreover, the plate heat exchanger has strict requirements on installation and operation. Once the operation is improper or the working conditions fluctuate greatly, it is easy to cause problems such as deformation and damage of the plate, reduce the service life of the equipment, increase the economic investment and time cost of equipment replacement, and is not conducive to the stable and efficient operation of the entire waste heat utilization system. For this reason, a waste heat utilization structure of the low-temperature flue gas of the electrolytic cell is proposed to solve the above problems. Summary of the invention

[0023] In order to make up for the above shortcomings, the present invention provides a structure for utilizing the waste heat of low-temperature flue gas from an electrolytic cell, aiming to improve the problem in the prior art of using a plate heat exchanger for heat exchange, which is very likely to cause blockage of the flow channel due to its narrow flow channel, thereby significantly reducing the heat exchange efficiency.

[0024] In order to achieve the above object, the present invention adopts the following technical solutions: A structure for utilizing waste heat of low-temperature flue gas in an electrolytic cell, comprising a tank body, a base fixedly connected to the outer wall of the tank body, a liquid inlet pipe fixedly connected to the inside of the tank body, a liquid outlet pipe fixedly connected to the inside of the tank body, a flue gas inlet pipe fixedly connected to the inside of the flue gas inlet pipe, a flue gas outlet pipe fixedly connected to the inside of the flue gas inlet pipe, and a heat exchange component arranged inside the tank body; The heat exchange assembly includes a partition plate, the outer wall of the partition plate is fixedly connected to the inside of the tank body, a baffle plate is fixedly connected to the inside of the tank body, a U-shaped connecting pipe is fixedly connected to the inside of the baffle plate, a spoiler is fixedly connected to the outer wall of the U-shaped connecting pipe, the outer wall of the spoiler is fixedly connected to the inside of the tank body, and a connecting assembly is provided on the top of the smoke outlet pipe; Further, the connecting assembly comprises a hollow column, the outer wall of the hollow column is fixedly connected to the inner wall of the smoke outlet pipe, a wrench is fixedly connected to the outer wall of the hollow column, a rotating ring is fixedly connected to one side of the wrench, and a rotating assembly is provided on the outer wall of the hollow column; Further, the rotating assembly comprises a connecting block, the side wall of the connecting block is fixedly connected to the outer wall of the hollow column, the inner wall of the connecting block is rotatably connected to a wheel, and the outer wall of the wheel is rotatably connected to the inner wall of the rotating circle; Furthermore, the rotating assembly is used to prevent the rotating circle from derailing, thereby reducing frequent manual adjustments; Furthermore, the outer wall of the rotating circle is fixedly connected with a first connecting column, and the outer wall of the first connecting column is rotatably connected with a hollow plate; Furthermore, a second connecting column is fixedly connected inside the hollow plate, and a fan blade is fixedly connected to an outer wall of the second connecting column; Furthermore, one end of the fan blade is fixedly connected to a connection disk, the top of the connection disk is fixedly connected to a support plate, and the side wall of the support plate is fixedly connected to the inner wall of the hollow column.

[0025] The design of the electrolytic cell low-temperature flue gas waste heat utilization structure of this application involves multiple key technical points, including heat exchange components, effective coordination of flue gas flow and liquid flow, and optimization of connection and adjustment structures. The following briefly describes the research and development process of this application solution and explains the design ideas and innovations of some technical elements.

[0026] Requirements analysis and function determination Target function: The core goal of the solution is to effectively utilize the waste heat of low-temperature flue gas from the electrolyzer. By designing an efficient heat exchange system to improve the recovery efficiency of heat energy, and without affecting the performance of the electrolyzer, the waste heat can be converted into usable heat energy or used in other process flows.

[0027] Optimization points: Traditional flue gas waste heat utilization devices may face problems such as low thermal efficiency, poor heat transfer performance, and difficulty in adjustment. These problems need to be solved during the development process to improve the heat exchange capacity, durability, and ease of adjustment of the device.

[0028] Overall structural design Tank body and liquid inlet and outlet pipes: The tank body is the outer shell of the entire equipment, which plays the role of accommodating the flow of flue gas and liquid. The design of the liquid inlet and outlet pipes ensures that the liquid can have a good heat exchange with the flue gas inside the tank body.

[0029] Smoke inlet pipe and outflow pipe: The smoke inlet pipe guides the smoke into the tank, while the smoke outflow pipe is used to discharge the cooled smoke. By optimizing the pipeline layout, the flow path and speed of the smoke and liquid can maintain the maximum efficiency of heat exchange.

[0030] Heat exchange component design Partitions and baffles: Partitions and baffles are designed to effectively separate the space where smoke and liquid flow, promoting heat exchange. By accurately calculating the flow distribution in different temperature areas, it is ensured that the transfer of heat energy can cover the entire system and avoid energy loss.

[0031] U-shaped connecting tube and spoiler: The U-shaped connecting tube increases the residence time of the liquid during the flow process, thereby improving the heat exchange efficiency. The spoiler plays a role in disrupting the flow of the fluid, further enhancing the heat exchange effect.

[0032] Design of connection components and adjustment structures Hollow column and rotating assembly: In order to facilitate the adjustment of the internal structure of the device, a combination of a hollow column and a rotating assembly is designed. The connecting block, wheels, rotating ring and other components in the rotating assembly work together to make the adjustment process smoother. By adjusting the rotating ring, the position of the internal heat exchange component can be adjusted, thereby optimizing the heat exchange process.

[0033] Anti-derailment mechanism: Anti-derailment measures are added to the design of the rotating circle to avoid damage or unstable operation caused by frequent adjustments. By setting up the rotating component, the need for manual intervention can be reduced and the overall automation level can be improved.

[0034] Design of fan blades and connecting disc Fan blades and connecting plate: The design of the fan blades can enhance the heat dissipation of airflow, which can effectively guide the internal hot air out, thereby accelerating the heat exchange process. The connecting plate and support plate structure can enhance the stability and durability of the fan blades and ensure the reliability of long-term operation.

[0035] Connection between the support plate and the hollow column: The design of connecting the support plate to the hollow column ensures the stability of the fan blades, and at the same time facilitates the flexible control of the fan blade angle through the adjustment system, thereby affecting the flue gas flow rate and temperature, and further optimizing the heat exchange efficiency.

[0036] Durability and maintainability design During the entire solution development process, special attention was paid to the durability and maintainability of the device. By selecting high temperature and corrosion resistant materials to reduce equipment wear, and considering the design of easy disassembly and cleaning structures, the service life of the device was extended and maintenance costs were reduced.

[0037] The solution of this application realizes the efficient recovery and utilization of the waste heat of low-temperature flue gas in the electrolyzer through innovative heat exchange component design, flexible adjustment structure and efficient flue gas and liquid flow management. By optimizing each link, the heat exchange efficiency is improved and the need for manual intervention is reduced, while the durability and maintainability of the device are enhanced.

[0038] The present invention proposes a low-temperature flue gas waste heat utilization structure for an electrolytic cell, which has a series of optimized designs, aiming to improve the recovery efficiency of low-temperature flue gas waste heat, save energy and reduce consumption, and has strong stability and durability, and has the following beneficial effects: 1. Efficiently utilize the waste heat of low-temperature flue gas to improve energy-saving effects. The present invention can effectively recover and utilize the waste heat of low-temperature flue gas generated during the operation of the electrolytic cell by designing a set of integrated flue gas and liquid heat exchange components. In traditional industrial electrolytic cells, flue gas is generally discharged directly into the environment, and the waste heat is not effectively recovered. The present invention transfers the heat of the exhaust gas to the fluid by introducing a heat exchange structure between the flue gas inlet pipe and the liquid inlet pipe, thereby realizing waste heat recovery. Specifically, after the flue gas enters the tank body, it exchanges heat with the liquid through the heat exchange component arranged inside the tank body, which increases the temperature of the liquid while lowering the temperature of the flue gas, thereby reducing energy waste. Since the temperature of the flue gas generated during the operation of the electrolytic cell is relatively high, by effectively recovering the waste heat of the low-temperature flue gas, not only can the energy consumption of the factory be effectively reduced, but also the energy-saving level of the factory can be improved as a whole; 2. Optimized heat exchange component design to improve heat exchange efficiency. The heat exchange component is the core part of the present invention. Traditional heat exchange devices mostly use simple pipeline heat exchange structures, while the present invention optimizes the flue gas flow path and liquid flow mode by introducing elements such as partition plates, baffles, U-shaped connecting pipes, and spoilers. These designs make the flow of flue gas in the tank more tortuous, increase the contact area between flue gas and liquid, and thus improve the efficiency of heat exchange; the design of partition plates and baffles effectively separates the flue gas flow channel, ensuring a more uniform flow of flue gas, which helps to improve the heat exchange effect; the combined design of U-shaped connecting pipes and spoilers not only changes the flow direction of the flue gas, but also increases the turbulence of the flue gas, further enhancing the heat exchange capacity; through these designs, the heat in the flue gas can be more effectively transferred to the liquid flow, thereby improving the heat exchange efficiency of the entire device, and providing a more efficient solution for the recovery of low-temperature flue gas waste heat in the electrolyzer; 3. Flexible adjustment structure to reduce manual intervention. The present invention has designed a unique set of rotating components and connecting components, which enables the equipment to flexibly adjust and control the flow state of flue gas and liquid during operation. This structure mainly includes a hollow column, a rotating ring, a rotating component, etc. Through these designs, the flue gas flow and liquid flow can be automatically or manually adjusted according to different working conditions, thereby optimizing the heat exchange effect. In particular, the addition of the rotating component not only prevents the rotating ring from derailing and reduces the need for frequent manual adjustments, but also enables the equipment to maintain a stable operating state during long-term use. This structural design greatly improves the automation level of the equipment, reduces manual intervention, and improves the convenience and safety of operation; 4. High durability and corrosion resistance to extend the service life of the equipment. Since the operating environment of the electrolytic cell usually involves high temperature, highly corrosive gases and liquids, the high temperature resistance and corrosion resistance of the equipment are crucial. The present invention adopts high temperature resistant and corrosion resistant materials in design, and performs special treatment on key parts such as liquid inlet pipes, flue gas inlet pipes, heat exchange components, etc. to enhance their corrosion resistance and durability. These designs ensure the stability of the equipment during long-term operation and significantly extend the service life of the equipment; at the same time, the materials and surface treatments of key structural components such as partition plates, baffles, U-shaped connecting pipes, spoilers, etc. meet the requirements of high temperature and corrosive environments, ensuring that the equipment can operate stably under harsh conditions, reducing failures and downtime caused by equipment aging, thereby reducing maintenance costs and operating risks; 5. Compact structure, convenient maintenance, and reduced operating costs. The design structure of the present invention is simple and compact, and the various components are tightly integrated through a reasonable layout, avoiding too many complex structural parts, which not only reduces the manufacturing cost, but also simplifies the installation and maintenance process of the equipment. During the operation of the equipment, maintenance and cleaning work become more convenient due to the optimization of the structure. In particular, the design of the connecting components, rotating components and adjusting components allows maintenance personnel to make appropriate adjustments or clean the equipment without disassembling the equipment, reducing downtime and labor costs; 6. Strong adaptability, suitable for different working conditions. The design of the present invention has strong adaptability and can be flexibly adjusted according to different working conditions and requirements. For example, by adjusting the structure of the rotating circle and the connecting component, it can cope with changes in different temperatures and flow rates, ensuring that the device can operate stably and efficiently under various working conditions. In addition, the structural design of the heat exchange component can also adapt to different flue gas and liquid flow conditions to maintain the heat exchange efficiency unchanged; 7. Superior comprehensive performance and significant economic benefits. The present invention has successfully achieved multiple advantages such as energy saving and consumption reduction, improved heat exchange efficiency, reduced operating costs, and extended equipment service life through innovative design in the electrolyzer low-temperature flue gas waste heat recovery system. By effectively utilizing the low-temperature flue gas waste heat generated by the electrolyzer, it can not only significantly reduce energy waste, but also bring considerable economic and environmental benefits to the enterprise. In addition, the high automation and low maintenance requirements of the equipment further reduce the operating costs of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A three-dimensional schematic diagram of a structure for utilizing waste heat from low-temperature flue gas in an electrolytic cell proposed by the present invention; Figure 2 A schematic diagram of the cross-sectional structure of a tank of a low-temperature flue gas waste heat utilization structure of an electrolytic cell proposed by the present invention; Figure 3This is a schematic diagram of the inner wall structure of a hollow column of a low-temperature flue gas waste heat utilization structure of an electrolytic cell proposed by the present invention; Legend: 1. Tank body; 2. Base; 3. Hollow column; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Smoke inlet pipe; 7. Smoke outlet pipe; 8. Wheel; 9. Partition plate; 10. Blocking plate; 11. U-shaped connecting pipe; 12. Spoiler; 13. Wrench; 14. Turning circle; 15. First connecting column; 16. Hollow plate; 17. Second connecting column; 18. Fan blade; 19. Connecting plate; 20. Support plate; 21. Connecting block. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0041] Reference Figure 1 and Figure 2 , an embodiment provided by the present invention: a structure for utilizing waste heat of low-temperature flue gas in an electrolytic cell, comprising a tank body 1, the tank body 1 can be made of carbon steel, which has good strength and toughness, a base 2 is fixedly connected to the outer wall of the tank body 1, a liquid inlet pipe 4 is fixedly connected inside the tank body 1, both the liquid inlet pipe 4 and the liquid outflow pipe 5 can be made of stainless steel pipes, which are corrosion-resistant and have good thermal conductivity, a liquid outflow pipe 5 is fixedly connected inside the tank body 1, a flue gas inlet pipe 6 is fixedly connected inside the tank body 1, both the flue gas inlet pipe 6 and the flue gas outflow pipe 7 can be made of high-temperature resistant ceramic lined steel pipes, which can withstand the corrosion and high-temperature impact of the low-temperature flue gas in the electrolytic cell, a flue gas inlet pipe 6 is fixedly connected inside the flue gas outflow pipe 7, and a heat exchange component is arranged inside the tank body 1; The heat exchange component includes a partition plate 9, which can be made of glass fiber reinforced plastic. The outer wall of the partition plate 9 is fixedly connected to the inside of the tank body 1. The tank body 1 is fixedly connected with a baffle plate 10. The baffle plate 10 is made of a polytetrafluoroethylene plate, which is resistant to high temperature and has a low friction coefficient. The baffle plate 10 is fixedly connected to the inside of the baffle plate 11. The outer wall of the U-shaped connecting pipe 11 is fixedly connected to a spoiler 12. The outer wall of the spoiler 12 is fixedly connected to the inside of the tank body 1. A connecting component is provided on the top of the smoke outlet pipe 7; Specifically, when the electrolyzer low-temperature flue gas waste heat utilization structure is activated, there is a rigorous and orderly operation process. First, low-temperature cold water is stably injected into the internal space of the tank body 1 through a special liquid inlet pipe 4. Then, with the help of the partition plate 9 placed in the tank body 1, the cold water is effectively blocked and temporarily retained in the top area of ​​the partition plate 9. Subsequently, under the guidance of the pressure difference and the pipeline design, the cold water begins to flow along the U-shaped connecting pipe 11, and will flow out from another outlet thereof, thereby realizing the circulation of the liquid at the bottom of the partition plate 9. After completing this circulation path, the liquid is immediately discharged from the tank body 1 through the liquid outflow pipe 5, ready to enter the heat exchange process. In the heat exchange stage, the low-temperature flue gas is discharged into the tank body 1 through the flue gas inlet pipe 6. At this time, the spoiler 12 in the tank body 1 plays a key role. It can disrupt the flow trajectory of the flue gas, so that its residence time inside the tank body 1 can be significantly extended. During the retention period of flue gas, the residual heat contained in it will exchange heat with the liquid in the tube through the U-shaped connecting tube 11. In this heat transfer process, the liquid flowing in from the liquid inlet tube 4 continuously absorbs the heat of the flue gas and is heated. Finally, the heated liquid flows out of the tank body 1 again with the help of the liquid outlet pipe 5, so as to carry out subsequent processes such as heating and industrial production heating. Through such orderly design and operation, the excellent effect of efficient heat exchange is effectively achieved, which greatly improves the recovery rate of the residual heat of the low-temperature flue gas in the electrolyzer, and provides strong support for the efficient use of energy and energy conservation and emission reduction.

[0042] Reference Figure 1 and Figure 3 The connecting component includes a hollow column 3, which can be made of aluminum alloy. The outer wall of the hollow column 3 is fixedly connected to the inner wall of the flue gas outlet pipe 7. The outer wall of the hollow column 3 is fixedly connected with a wrench 13, which can be made of stainless steel. A rotating circle 14 is fixedly connected to one side of the wrench 13. The outer wall of the hollow column 3 is provided with a rotating component, and the rotating component includes a connecting block 21. The side wall of the connecting block 21 is fixedly connected to the outer wall of the hollow column 3. The inner wall of the connecting block 21 is rotatably connected with a wheel 8. The wheel 8 is preferably made of wear-resistant nylon. The outer wall of the wheel 8 is rotatably connected to the inner wall of the rotating circle 14. The rotating component is used to prevent the rotating circle from 14 derailment, thereby reducing frequent manual adjustments, the outer wall of the rotating circle 14 is fixedly connected with a first connecting column 15, the outer wall of the first connecting column 15 is rotatably connected with a hollow plate 16, the hollow plate 16 is preferably made of aluminum alloy, the inside of the hollow plate 16 is fixedly connected with a second connecting column 17, the outer wall of the second connecting column 17 is fixedly connected with a fan blade 18, the fan blade 18 is made of stainless steel, can withstand the smoke environment and has good aerodynamic performance, one end of the fan blade 18 is fixedly connected with a connecting plate 19, the top of the connecting plate 19 is fixedly connected with a support plate 20, and the side wall of the support plate 20 is fixedly connected to the inner wall of the hollow column 3; Specifically, when it is necessary to adjust the flue gas outflow speed, the operator manually turns the wrench 13. Since there is a specific connection structure between the wrench 13 and the rotating circle 14, when the wrench 13 is subjected to force, the force will be transmitted to the rotating circle 14, thereby driving the rotating circle 14 to rotate around its axis. During the rotation of the rotating circle 14, the first connecting column 15 to which its outer wall is fixedly connected will also rotate synchronously. There is a stuck connection relationship between the outer wall of the first connecting column 15 and the hollow plate 16, so the hollow plate 16 will start to rotate under the drive of the first connecting column 15. The rotation of the hollow plate 16 will further drive the second connecting column 17 connected thereto to move. Under the transmission of force, the second connecting column 17 will drive the fan blade 18 to start rotating after being subjected to force. The rotation of the fan blade 18 can change the resistance during the flow of flue gas, thereby achieving the adjustment of the flue gas outflow speed. It is worth mentioning that during the entire rotation process of the rotating circle 14, the wheel 8 plays a key auxiliary role. It can effectively prevent the rotating circle 14 from derailing due to uneven force or other reasons, ensuring the smooth and smooth progress of the entire adjustment process, and ultimately accurately achieving the expected effect of adjusting the flue gas outflow speed, so as to better adapt to the different requirements of the entire system for flue gas flow and ensure the efficient and stable operation of the system.

[0043] Working principle: When using the electrolytic cell low-temperature flue gas waste heat utilization structure, firstly, cold water flows into the interior of the tank body 1 through the liquid inlet pipe 4, and then the liquid is separated by the partition plate 9, so that it remains on the top of the partition plate 9, and then flows through the U-shaped connecting pipe 11, and the liquid will flow out from another outlet, so that the liquid flows at the bottom of the partition plate 9, and then the liquid is discharged through the liquid outflow pipe 5, and then when exchanging heat, the flue gas is discharged into the interior of the tank body 1 through the flue gas inlet pipe 6, and then the flue gas is allowed to stay longer in the tank body 1 through the spoiler 12. During this period, the residual temperature inside the flue gas is exchanged through the U-shaped connecting pipe 11. In this process, the flue gas flows into the liquid inlet pipe 4. The liquid will be heated and flow out through the liquid outflow pipe 5 again to carry out subsequent processes, thereby achieving the effect of efficient heat exchange. Then, when adjusting the flue gas outflow speed, the wrench 13 is pulled, and the wrench 13 is driven by the force to drive the rotating circle 14 to rotate. When the rotating circle 14 is rotated under the force, the first connecting column 15 of the outer wall is driven to rotate along with the rotating circle 14. Then, the rotation of the first connecting column 15 drives the hollow plate 16 stuck on the outer wall to rotate. When the hollow plate 16 is rotated under the force, the second connecting column 17 is driven. At the same time, the second connecting column 17 will drive the fan blade 18 to rotate under the force, and during the rotation of the rotating circle 14, the wheel 8 is used to prevent the rotating circle 14 from derailing, thereby achieving the effect of adjusting the flue gas outflow speed.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A structure for utilizing waste heat from low-temperature flue gas in an electrolytic cell, comprising a tank body (1), characterized in that: The outer wall of the tank body (1) is fixedly connected to a base (2), the interior of the tank body (1) is fixedly connected to a liquid inlet pipe (4), the interior of the tank body (1) is fixedly connected to a liquid outlet pipe (5), the interior of the tank body (1) is fixedly connected to a smoke inlet pipe (6), the interior of the smoke inlet pipe (6) is fixedly connected to a smoke outlet pipe (7), and a heat exchange component is arranged inside the tank body (1); The heat exchange assembly comprises a partition plate (9), the outer wall of the partition plate (9) is fixedly connected to the inside of the tank body (1), a baffle plate (10) is fixedly connected to the inside of the tank body (1), a U-shaped connecting pipe (11) is fixedly connected to the inside of the baffle plate (10), a spoiler plate (12) is fixedly connected to the outer wall of the U-shaped connecting pipe (11), the outer wall of the spoiler plate (12) is fixedly connected to the inside of the tank body (1), and a connecting assembly is arranged on the top of the smoke outlet pipe (7).

2. The electrolytic cell low-temperature flue gas waste heat utilization structure according to claim 1, characterized in that: The connection assembly comprises a hollow column (3), the outer wall of the hollow column (3) being fixedly connected to the inner wall of the smoke outlet pipe (7), a wrench (13) being fixedly connected to the outer wall of the hollow column (3), a rotating ring (14) being fixedly connected to one side of the wrench (13), and a rotating assembly being arranged on the outer wall of the hollow column (3).

3. The electrolytic cell low-temperature flue gas waste heat utilization structure according to claim 2, characterized in that: The rotating assembly comprises a connecting block (21), the side wall of the connecting block (21) being fixedly connected to the outer wall of the hollow column (3), the inner wall of the connecting block (21) being rotatably connected to a wheel (8), and the outer wall of the wheel (8) being rotatably connected to the inner wall of the rotating circle (14).

4. The electrolytic cell low-temperature flue gas waste heat utilization structure according to claim 3 is characterized in that: The rotating assembly is used to prevent the rotating circle (14) from derailing, thereby reducing frequent manual adjustments.

5. The electrolytic cell low-temperature flue gas waste heat utilization structure according to claim 3, characterized in that: The outer wall of the rotating circle (14) is fixedly connected to a first connecting column (15), and the outer wall of the first connecting column (15) is rotatably connected to a hollow plate (16).

6. The electrolytic cell low-temperature flue gas waste heat utilization structure according to claim 5, characterized in that: A second connecting column (17) is fixedly connected inside the hollow plate (16), and a fan blade (18) is fixedly connected to the outer wall of the second connecting column (17).

7. The electrolytic cell low-temperature flue gas waste heat utilization structure according to claim 6, characterized in that: One end of the fan blade (18) is fixedly connected to a connection disk (19), the top of the connection disk (19) is fixedly connected to a support plate (20), and the side wall of the support plate (20) is fixedly connected to the inner wall of the hollow column (3).

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