Heat preservation sealing device for aluminum electrolysis cell
A dual-chamber insulation system with water-filled chambers addresses the insulation and sealing issues in aluminum electrolysis, improving thermal efficiency and gas management by utilizing waste heat for enhanced insulation and sealing.
Patent Information
- Application Number
- CN202422363428.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The air collector hood of the existing aluminum electrolytic tank is difficult to achieve effective insulation and sealing in high temperature environments, and the insulation effect at the bottom of the tank is poor, affecting the environment and equipment safety.
A thermal insulation sealing device for aluminum electrolytic cells is designed. By setting an isolation chamber and an upper water chamber with water on the tank cover, the upper seal and thermal insulation are achieved, and the exhaust gas is introduced into the bottom cavity. Combined with the lower water chamber with water, the thermal insulation of the bottom of the tank is achieved.
The sealing and insulation effect above the aluminum electrolytic tank is improved. At the same time, the water in the water cavity is heated by waste heat, which enhances the insulation performance of the bottom of the tank, solves the cooling problem at the bottom of the tank, and improves the safety and environmental protection performance of the equipment.
Smart Images
Figure CN223103106U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas collecting hoods for electrolytic cells, in particular to a heat preservation and sealing device for aluminum electrolytic cells. Background Technique
[0002] During the production process of electrolytic aluminum, the flue gas discharged from the aluminum electrolytic cell contains a large amount of fluorine-containing substances, which pose great harm to human health, the workshop environment and the surrounding atmospheric quality. Therefore, a gas collecting hood is arranged above the aluminum electrolytic cell to collect the harmful tail gas during the aluminum electrolysis process, and then send it to the tail gas treatment equipment for heat recovery and tail gas purification.
[0003] Since a high-temperature environment needs to be maintained during aluminum electrolysis, the gas collecting hood also needs to have good heat preservation effect. The existing technology realizes the purposes of sealing and heat preservation by setting heat-insulating structures on the gas collecting hood. However, cold bottom is also one of the common problems in aluminum electrolysis plants, and the bottom of the aluminum electrolytic cell also needs to have good heat preservation effect. Therefore, we propose a heat preservation and sealing device for aluminum electrolytic cells. Content of the Utility Model
[0004] The purpose of the utility model is to provide a heat preservation and sealing device for aluminum electrolytic cells. By arranging a tank cover sealed above the aluminum electrolytic cell, using the internal isolation cavity and the upper water cavity filled with water, the purposes of sealing and heat insulation above are realized. At the same time, the tail gas can be transmitted to the bottom cavity located below the aluminum electrolytic cell, and cooperate with the lower water cavity filled with water to realize the heat insulation effect on the bottom of the aluminum electrolytic cell, and the heat insulation effect is better, solving the problems proposed in the background technique.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: a heat preservation and sealing device for aluminum electrolytic cells, including a tank cover and a bottom frame. The bottom frame is placed below the tank cover. A ring plate is fixedly surrounded on the outer circle of the bottom of the tank cover, and a bottom plate is fixedly arranged at the bottom of the bottom frame. An outer cover plate is fixedly arranged above the ring plate inside the tank cover, and an inner cover plate is fixedly arranged above the ring plate inside the outer cover plate. An isolation cavity is formed between the inner cover plate and the outer cover plate, an upper water cavity is formed between the outer cover plate and the tank cover, and a plurality of through holes are evenly arranged on both side surfaces of the inner cover plate. A partition is fixedly arranged inside the bottom frame, a bottom cavity is formed between the partition and the bottom frame above the partition, a lower water cavity is formed between the partition and the bottom frame below the partition, a conduit is communicated between the isolation cavity and the bottom cavity, and an air outlet pipe penetrating to the outside of the bottom frame is connected to the side of the bottom cavity.
[0006] By adopting the above technical scheme, the tank cover is sealed above the aluminum electrolytic cell through the ring plate, and the bottom frame is placed below the aluminum electrolytic cell, so that the bottom of the aluminum electrolytic cell is placed in the support groove. The tank cover realizes the sealing and tail gas collection above the aluminum electrolytic cell, and at the same time plays a role in heat insulation above. The tail gas is transmitted to the bottom cavity of the lower bottom frame, and the heat insulation effect on the bottom of the aluminum electrolytic cell can be realized.
[0007] Optionally, a plurality of through openings are uniformly formed on the surface of the slot cover, and the through openings penetrate through the outer cover plate and the inner cover plate and communicate with the inside of the inner cover plate.
[0008] By adopting the above technical solution, the anode conductive rod for connecting the anode penetrates into the aluminum electrolytic cell through the through opening.
[0009] Optionally, a heat-insulating cotton is sleeved and fixed on the outer ring of the conduit, and the inner ring of the heat-insulating cotton is closely attached to the outer surface of the conduit.
[0010] By adopting the above technical solution, heat insulation of the guide cylinder is achieved through the heat-insulating cotton.
[0011] Optionally, connecting pipes are connected to the sides of the upper water chamber and the lower water chamber respectively, and the connecting pipes communicate with the inside of the upper water chamber and the lower water chamber respectively.
[0012] By adopting the above technical solution, clear water can be injected into or discharged from the upper water chamber or the lower water chamber by using the connecting pipes.
[0013] Optionally, at least two connecting pipes are connected to the sides of the upper water chamber and the lower water chamber respectively, and valves are installed on the connecting pipes.
[0014] By adopting the above technical solution, at least one water inlet connecting pipe and one water outlet connecting pipe can be arranged in both the upper water chamber and the lower water chamber.
[0015] Optionally, a support groove is arranged on the surface of the bottom frame, and the support groove is located at the middle position of the surface of the bottom frame.
[0016] By adopting the above technical solution, the bottom of the aluminum electrolytic cell is positioned and placed through the support groove.
[0017] Compared with the prior art, the beneficial effects of the technical solution of the present application are as follows:
[0018] 1. The technical solution of the present application realizes sealing and upper heat insulation by arranging the slot cover to be sealed above the aluminum electrolytic cell and using the isolation chamber and the upper water chamber filled with water inside it. At the same time, the tail gas can be transmitted to the bottom chamber located below the aluminum electrolytic cell, and cooperate with the lower water chamber filled with water to realize heat insulation of the bottom of the aluminum electrolytic cell, and the heat insulation effect is better.
[0019] 2. While improving the heat insulation effect by using the upper water chamber and the lower water chamber, the technical solution of the present application can utilize the waste heat to heat water and utilize the energy in the waste heat as needed. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Other features, objects and advantages of the present utility model will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0021] Figure 1 This is a schematic diagram of the overall structure of the thermal insulation and sealing device for the aluminum electrolysis cell of the present utility model;
[0022] Figure 2 This is a schematic cross-sectional structure diagram of the thermal insulation and sealing device for the aluminum electrolysis cell of the present utility model.
[0023] In the figure: 1. Cell cover; 11. Ring plate; 12. Outer cover plate; 13. Inner cover plate; 131. Through hole; 14. Isolation chamber; 15. Upper water chamber; 16. Through port; 2. Bottom frame; 21. Bottom plate; 22. Partition board; 23. Bottom chamber; 231. Air outlet pipe; 24. Lower water chamber; 25. Support groove; 3. Conduit; 31. Thermal insulation cotton; 4. Connecting pipe; 41. Valve. Specific embodiments
[0024] Please refer to Figure 1-2 , the present utility model provides a technical solution: a thermal insulation and sealing device for an aluminum electrolysis cell, including a cell cover 1 and a bottom frame 2. A ring plate 11 is fixedly surrounded around the outer circle of the bottom of the cell cover 1, so that it is supported above the aluminum electrolysis cell through the ring plate 11. A heat-resistant sealing rubber ring is arranged between the ring plate 11 and the aluminum electrolysis cell to achieve a sealing effect.
[0025] In order to improve the thermal insulation effect of the cell cover 1, an outer cover plate 12 is fixed above the ring plate 11 on the inner side of the cell cover 1, and an inner cover plate 13 is fixed above the ring plate 11 on the inner side of the outer cover plate 12, so that an isolation chamber 14 is formed between the inner cover plate 13 and the outer cover plate 12, and an upper water chamber 15 is formed between the outer cover plate 12 and the cell cover 1. A plurality of through holes 131 are evenly opened on both side surfaces of the inner cover plate 13. The tail gas during the operation of the aluminum electrolysis cell can enter the isolation chamber 14 through the through holes 131. The additionally provided isolation chamber 14 can improve the heat insulation effect. After filling the upper water chamber 15 with clear water, the water inside the upper water chamber 15 can be heated by the waste heat, adding an additional heat insulation structure to further improve the heat insulation effect above. A plurality of through ports 16 are evenly opened on the surface of the cell cover 1. The through ports 16 penetrate through the outer cover plate 12 and the inner cover plate 13 and communicate to the inner side of the inner cover plate 13. The through ports 16 are used for the anode conductive rod connecting the anode to pass through and then penetrate into the aluminum electrolysis cell. It is also necessary to set heat-insulating sealing materials directly between the anode conductive rod and the through ports 16 to ensure that the heat preservation and sealing effects are not affected.
[0026] The bottom frame 2 is placed below the cell cover 1 and is located below the aluminum electrolysis cell. A bottom plate 21 is fixed at the bottom of the bottom frame 2. The bottom frame 2 is supported and placed through the bottom plate 21. A support groove 25 is arranged on the surface of the bottom frame 2. The support groove 25 is located at the middle position on the surface of the bottom frame 2. The aluminum electrolysis cell is placed below and positioned inside the support groove 25 and touches the bottom frame 2 through the support groove 25. In order to avoid a large pressure acting on the bottom frame 2, it is also necessary to additionally set a support structure to support and fix the aluminum electrolysis cell.
[0027] Inside the bottom frame 2, a partition 22 is fixedly installed. Between the upper part of the partition 22 and the bottom frame 2, a bottom cavity 23 is formed. Between the lower part of the partition 22 and the bottom frame 2, a water drainage cavity 24 is formed. A conduit 3 is connected between the isolation cavity 14 and the bottom cavity 23. The two ends of the conduit 3 respectively penetrate through the trough cover 1 and the bottom frame 2 and are connected to the inside of the isolation cavity 14 and the bottom cavity 23, so that the tail gas above can be led to the bottom cavity 23 below, and the heat is also transferred to the bottom, achieving the heat preservation and insulation effect on the bottom of the aluminum electrolytic cell. At the same time, after filling the water drainage cavity 24 with clean water, the water inside the water drainage cavity 24 can be heated by the waste heat, adding an additional heat insulation structure to further improve the heat insulation and preservation effect below. A heat insulation cotton 31 is sleeved and fixed on the outer circle of the conduit 3, and the inner circle of the heat insulation cotton 31 is closely attached to the outer surface of the conduit 3, achieving the purpose of heat preservation and insulation for the conduit 3.
[0028] The side of the bottom cavity 23 is connected with an air outlet pipe 231 that penetrates to the outside of the bottom frame 2. Finally, the tail gas can be discharged to the outside from the air outlet pipe 231 and conducted to the tail gas purification equipment for tail gas treatment.
[0029] Both sides of the upper water cavity 15 and the water drainage cavity 24 are connected with connecting pipes 4. The connecting pipes 4 are respectively communicated with the inside of the upper water cavity 15 and the water drainage cavity 24. Both sides of the upper water cavity 15 and the water drainage cavity 24 are connected with at least two connecting pipes 4. A valve 41 is installed on the connecting pipe 4, so that one of the connecting pipes 4 of the upper water cavity 15 or the water drainage cavity 24 serves as an inlet pipe for injecting clean water, and the other connecting pipe 4 serves as a drain pipe, which can facilitate the replacement of the water in the upper water cavity 15 or the water drainage cavity 24.
[0030] In use, the bottom frame 2 is supported under the aluminum electrolytic cell through the bottom plate 21, and then the bottom of the aluminum electrolytic cell is placed on the support groove 25 of the bottom frame 2. To reduce the pressure on the bottom frame 2 and at the same time set up a support structure to stably support the aluminum electrolytic cell, only its bottom touches the inner surface of the support groove 25. The cell hood 1 is supported above the aluminum electrolytic cell, and a sealing structure is set up. The sealing ring plate 11 and the upper part of the aluminum electrolytic cell achieve the structural sealing of the upper part of the aluminum electrolytic cell. The anode conductive rod passes through the through hole 16 into the aluminum electrolytic cell, and a sealing structure is set between the anode conductive rod and the through hole 131 to achieve good sealing. The water supply pipe is connected through the connecting pipe 4, and clear water is respectively injected into the upper water cavity 15 and the lower water cavity 24. Then the valve 41 is closed, and the air outlet pipe 231 is connected to the tail gas purification equipment. During the aluminum electrolysis operation, raw materials are added through the material port on the side of the aluminum electrolytic cell. During the aluminum electrolysis process, the harmful tail gas generated is placed inside the inner cover plate 13 and enters the isolation cavity 14 through the through hole 131 on the surface of the inner cover plate 13 to achieve the purpose of heat insulation and heat preservation. And due to the pressure effect, the tail gas enters the bottom cavity 23 in the bottom frame 2 through the conduit 3. The inside of the bottom cavity 23 also heats up due to the heat of the tail gas, and at the same time the heat can be transferred to the upper water cavity 15 and the lower water cavity 24 to heat the water inside the two, thereby improving the heat insulation and heat preservation effect. The upper part of the aluminum electrolytic cell plays a role of heat insulation and heat preservation under the action of the isolation cavity 14 and the upper water cavity 15, and the heat transferred to the bottom cavity 23 cooperates with the lower water cavity 24 to also have a heat insulation and heat preservation effect on the bottom of the cell. Finally, the tail gas is discharged to the tail gas purification equipment through the air outlet pipe 231 for subsequent treatment. The water in the upper water cavity 15 and the lower water cavity 24 can be discharged through another connecting pipe 4 and injected again through the connecting pipe 4 connected to the clear water pipe to achieve the purpose of replacement.
Claims
1. A thermal insulation and sealing device for an aluminum electrolysis cell, comprising a cell cover (1) and a bottom frame (2), characterized in that: The bottom frame (2) is placed below the groove cover (1). A ring plate (11) is fixedly arranged around the outer circle of the bottom of the groove cover (1), and a bottom plate (21) is fixedly arranged at the bottom of the bottom frame (2). An outer cover plate (12) is fixedly arranged above the ring plate (11) inside the groove cover (1), and an inner cover plate (13) is fixedly arranged above the ring plate (11) inside the outer cover plate (12). An isolation chamber (14) is formed between the inner cover plate (13) and the outer cover plate (12), a water inlet chamber (15) is formed between the outer cover plate (12) and the groove cover (1), and a plurality of through holes (131) are evenly formed on both side surfaces of the inner cover plate (13). A partition plate (22) is fixedly arranged inside the bottom frame (2). A bottom chamber (23) is formed between the partition plate (22) and the bottom frame (2) above the partition plate (22), and a water outlet chamber (24) is formed between the partition plate (22) and the bottom frame (2) below the partition plate (22). A conduit (3) is communicated between the isolation chamber (14) and the bottom chamber (23), and an air outlet pipe (231) penetrating to the outside of the bottom frame (2) is connected to the side of the bottom chamber (23).
2. The thermal insulation and sealing device for an aluminum electrolysis cell according to claim 1, characterized in that: A plurality of through openings (16) are evenly formed on the surface of the groove cover (1), and the through openings (16) penetrate through the outer cover plate (12) and the inner cover plate (13) and are communicated to the inside of the inner cover plate (13).
3. The thermal insulation and sealing device for an aluminum electrolysis cell according to claim 1, characterized in that: A heat-insulating cotton (31) is sleeved and fixedly arranged on the outer circle of the conduit (3), and the inner circle of the heat-insulating cotton (31) is closely attached to the outer surface of the conduit (3).
4. The thermal insulation and sealing device for an aluminum electrolysis cell according to claim 1, characterized in that: Connection pipes (4) are connected to the sides of the water inlet chamber (15) and the water outlet chamber (24), and the connection pipes (4) are respectively communicated with the inside of the water inlet chamber (15) and the water outlet chamber (24).
5. The thermal insulation and sealing device for an aluminum electrolysis cell according to claim 4, characterized in that: At least two connection pipes (4) are connected to the sides of the water inlet chamber (15) and the water outlet chamber (24), and valves (41) are installed on the connection pipes (4).
6. The thermal insulation and sealing device for an aluminum electrolytic cell according to claim 1, characterized in that: A support groove (25) is arranged on the surface of the bottom frame (2), and the support groove (25) is located at the middle position of the surface of the bottom frame (2).