Insulation device for electrolytic aluminum electrolytic bath

Abstract

The invention relates to electrolytic aluminum, and provides an electrolytic aluminum electrolytic cell heat preservation device which comprises a cell body, a supporting column used for supporting the cell body, a plurality of heat preservation assemblies arranged below the cell body, a driving device used for driving the heat preservation assemblies to ascend and descend and a circulating water device connected with the heat preservation assemblies. The multiple heat preservation assemblies are distributed in the length direction of the tank body, and each heat preservation assembly comprises a plurality of long-strip hollow heat preservation plates arranged in parallel, a supporting plate arranged below the heat preservation plates, springs used for connecting the heat preservation plates and the supporting plate, first connecting pipes used for communicating the adjacent heat preservation plates, and second connecting pipes used for communicating the adjacent heat preservation assemblies. In one heat preservation assembly, the distance between each heat preservation plate and the outer bottom wall of the tank body is different; the insulation board at the end part of the tank body is connected with the circulating water device, and the length direction of the insulation board is perpendicular to the length direction of the tank body. According to the heat preservation device for the electrolytic aluminum electrolytic bath, redundant heat generated in the electrolysis process can be efficiently utilized for heat preservation of the electrolytic bath.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolytic aluminum, and in particular to a heat preservation device for an electrolytic aluminum reduction cell. Background Art

[0002] Electrolytic aluminum is aluminum obtained by electrolysis. Modern electrolytic aluminum industry production adopts cryolite-alumina molten salt electrolysis. Molten cryolite is the solvent, alumina is the solute, carbonite is the anode, and aluminum liquid is the cathode. After a strong direct current is passed through, an electrochemical reaction is carried out at the two electrodes in the electrolytic cell at 950℃-970℃, that is, electrolysis.

[0003] The electrolysis process of electrolytic aluminum is mainly carried out in an electrolytic cell. After the electrolysis is completed, there is a large amount of liquid electrolyte (aluminum water, etc.) in the electrolytic cell, which needs to be discharged after the electrolysis is completed. In order to prevent the aluminum water from solidifying during the discharge process, the electrolytic cell needs to be insulated. However, due to the large amount of aluminum water, the discharge time is relatively long, and no matter how thick the insulation layer is, it is difficult to prevent the heat from dissipating. Therefore, some electrolytic cells need to add additional heating devices to achieve better insulation effect (that is, to generate continuous insulation at a certain temperature outside the insulation layer, so as to reduce the temperature difference between the inside and outside of the insulation layer, thereby reducing the heat loss rate of the electrolytic cell). However, the additional heating device is very energy-consuming (the electrolytic cell is large in size and large in number). Therefore, it is necessary to design a more energy-saving electrolytic cell insulation device. Summary of the invention

[0004] The object of the present invention is to provide an insulation device for an aluminum electrolytic cell, which can efficiently utilize the excess heat generated during the electrolysis process to insulate the electrolytic cell.

[0005] The present invention is achieved through the following technical solutions: the insulation device of the electrolytic aluminum electrolytic cell of the present invention includes a cell body, a pillar for supporting the cell body, including a plurality of insulation components arranged below the cell body, a driving device for driving the insulation components to rise and fall, and a circulating water device connected to the insulation components; a plurality of the insulation components are distributed along the length direction of the cell body, and the insulation components include a plurality of long and hollow insulation plates arranged parallel to each other, a support plate arranged below the insulation plate, a spring for connecting the insulation plate and the support plate, a first connecting pipe for connecting adjacent insulation plates, and a second connecting pipe for connecting adjacent insulation components; in one of the insulation components, the distance between each insulation plate and the outer bottom wall of the cell body is different; the insulation plate located at the end of the cell body is connected to the circulating water device, and the length direction of the insulation plate is perpendicular to the length direction of the cell body.

[0006] Furthermore, a plurality of the first connecting pipes are provided, and the plurality of the first connecting pipes are distributed along the length direction of the insulation board.

[0007] Furthermore, a plurality of the second connecting pipes are provided, and the plurality of the second connecting pipes are distributed along the length direction of the insulation board.

[0008] Furthermore, a plurality of sliders are provided on both sides of the insulation board; the sliders are evenly distributed along the length direction of the insulation board, and the gaps between adjacent sliders are slide grooves; the sliders of the insulation board are slidably arranged in the slide grooves of adjacent insulation boards.

[0009] Furthermore, the sliding block is a hollow structure and is connected to the interior of the insulation board.

[0010] Furthermore, a pair of support plates are provided, and the pair of support plates are respectively provided at both ends of the insulation board; the length direction of the support plate is perpendicular to the length direction of the insulation board; a pair of springs are provided, and the pair of springs are respectively provided at both ends of the insulation board.

[0011] Furthermore, a telescopic rod is provided in the spring, one end of the telescopic rod is connected to the insulation board, and the other end of the telescopic rod is connected to the support plate.

[0012] Furthermore, the driving device is provided with a pair, and the pair of driving devices are respectively arranged at the two ends of the trough body; the driving device includes a connecting plate for connecting the ends of a pair of support plates, a bracket arranged on the ground, and a telescopic cylinder vertically arranged on the bracket; the telescopic rod of the telescopic cylinder is connected to the connecting plate.

[0013] Furthermore, the upper end of the support is connected to the side wall of the trough body.

[0014] The technical solution of the present invention has at least the following advantages and beneficial effects: the heat preservation device of the electrolytic aluminum electrolytic cell of the present invention continuously injects flowing water into the heat preservation plate through the circulating water device, and transfers heat to the bottom of the cell body through the contact between the heat preservation plate and the bottom of the cell body (a large amount of heat generated during the electrolysis process is transferred to the water in the heat preservation plate at the bottom through the cell body, and the high-temperature water is stored after the water is heated). When it is necessary to keep the electrolyte inside the electrolytic cell warm, the high-temperature water can be re-sent into the heat preservation plate, and the heat preservation plate can be placed close to the cell body to keep the cell body warm. When it is necessary to adjust the heat preservation effect ( Or heat dissipation), a driving device can be used to drive the insulation components to descend synchronously. During the descent, since the initial height of each insulation board (i.e., in a static state without external force) is different, the insulation boards will not all detach. Instead, the insulation board with the lowest height detaches from the bottom wall of the trough body. As the height of the insulation assembly continues to drop, more insulation boards detach from the bottom wall of the trough body. In this way, the contact area between the insulation board and the bottom of the trough body can be adjusted by the height of the insulation assembly, thereby adjusting the insulation efficiency or heat dissipation efficiency of the bottom of the trough body, so that corresponding adjustments can be made according to the working state of the trough body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a heat preservation device for an electrolytic aluminum reduction cell from one perspective provided in an embodiment of the present invention;

[0016] Figure 2 A schematic structural diagram of a heat preservation device for an electrolytic aluminum reduction cell from two perspectives provided in an embodiment of the present invention;

[0017] Figure 3 A schematic structural diagram of a heat preservation device for an electrolytic aluminum cell from three perspectives provided in an embodiment of the present invention;

[0018] Figure 4 A schematic structural diagram of a thermal insulation assembly provided by an embodiment of the present invention from one perspective;

[0019] Figure 5 A schematic structural diagram of a thermal insulation assembly from two perspectives provided in an embodiment of the present invention.

[0020] Icons: 11- trough body, 12- pillar, 20- insulation assembly, 21- insulation board, 22- first connecting pipe, 23- second connecting pipe, 24- spring, 25- telescopic rod, 26- support plate, 27- slider, 28- slide groove, 30- driving device, 31- connecting plate, 32- bracket, 33- telescopic cylinder. DETAILED DESCRIPTION

[0021] Example

[0022] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 5As shown, the insulation device of the electrolytic aluminum reduction cell of this embodiment includes a cell body 11, a pillar 12 for supporting the cell body 11, a plurality of insulation components 20 arranged below the cell body 11, a driving device 30 for driving the insulation components 20 to rise and fall, and a circulating water device connected to the insulation components 20; the plurality of insulation components 20 are distributed along the length direction of the cell body 11, the insulation components 20 include a plurality of long and hollow insulation plates 21 arranged parallel to each other, a support plate 26 arranged below the insulation plate 21, a spring 24 for connecting the insulation plate 21 and the support plate 26, a first connecting pipe 22 for connecting adjacent insulation plates 21, and a second connecting pipe 23 for connecting adjacent insulation components 20; in one insulation component 20, the distance between each insulation plate 21 and the outer bottom wall of the cell body 11 is different; the insulation plate 21 located at the end of the cell body 11 is connected to the circulating water device, and the length direction of the insulation plate 21 is perpendicular to the length direction of the cell body 11. Specifically, flowing water is continuously injected into the insulation plate 21 through a circulating water device, and the insulation plate 21 is in contact with the bottom of the tank body 11 to transfer heat to the bottom of the tank body 11 (a large amount of heat generated during the electrolysis process is transferred to the water in the insulation plate 21 at the bottom through the tank body 11, and the water is heated and stored at high temperature). When it is necessary to keep the electrolyte inside the electrolytic cell warm, the high temperature water can be re-sent into the insulation plate 21, and the insulation plate 21 can be placed close to the tank body 11 to keep the tank body 11 warm. When it is necessary to adjust the insulation effect (or heat dissipation), the drive device 30 can be used to drive the insulation plate 21 to adjust the insulation effect (or heat dissipation). The thermal components 20 descend synchronously. During the descending process, since the initial height (i.e., in a static state without external force) of each insulation board 21 is different, the insulation boards 21 will not all detach. Instead, the insulation board 21 with the lowest height detaches from the bottom wall of the trough body 11. As the height of the thermal insulation components 20 continues to descend, more insulation boards 21 detach from the bottom wall of the trough body 11. In this way, the contact area between the insulation boards 21 and the bottom of the trough body 11 can be adjusted by the height of the thermal insulation components 20, thereby adjusting the thermal insulation efficiency or heat dissipation efficiency of the bottom of the trough body 11, so that corresponding adjustments can be made according to the working state of the trough body 11.

[0023] In this embodiment, a plurality of first connecting tubes 22 are provided, and the plurality of first connecting tubes 22 are distributed along the length direction of the heat preservation board 21. A plurality of second connecting tubes 23 are provided, and the plurality of second connecting tubes 23 are distributed along the length direction of the heat preservation board 21. Specifically, since the heat preservation board 21 is relatively long, a plurality of first connecting tubes 22 and second connecting tubes 23 are required to promote the flow of water (or other types of heat-conducting media, such as oil, etc.), increase the flow rate of water, and prevent the high temperature of the tank body 11 from causing the water in the heat preservation board 21 to boil when the tank body 11 is in the electrolysis state.

[0024] In this embodiment, a plurality of sliders 27 are provided on both sides of the insulation board 21; the sliders 27 are evenly distributed along the length direction of the insulation board 21, and the gaps between adjacent sliders 27 are slide grooves 28; the sliders 27 of the insulation board 21 are slidably arranged in the slide grooves 28 of the adjacent insulation board 21. The sliders 27 are hollow structures and are connected to the inside of the insulation board 21. Specifically, through the cooperation of the sliders 27 and the slide grooves 28, the contact area between the adjacent insulation boards 21 can be significantly increased, thereby increasing the heat conduction efficiency between the adjacent insulation boards 21, so that the heat distribution in the insulation assembly 20 is more uniform.

[0025] In this embodiment, a pair of support plates 26 are provided, and the pair of support plates 26 are respectively provided at both ends of the insulation board 21; the length direction of the support plates 26 is perpendicular to the length direction of the insulation board 21; a pair of springs 24 are provided, and the pair of springs 24 are respectively provided at both ends of the insulation board 21. Specifically, a pair of support plates 26 and a pair of springs 24 are respectively provided at both ends of the insulation board 21, which can better support the insulation board 21.

[0026] In this embodiment, a telescopic rod 25 is provided inside the spring 24, one end of the telescopic rod 25 is connected to the heat preservation board 21, and the other end is connected to the support board 26. Specifically, the use of the telescopic rod 25 to connect the heat preservation board 21 and the support board 26 can make the movement of the heat preservation board 21 more stable, and the heat preservation board 21 can better maintain parallelism with the support board 26.

[0027] In this embodiment, a pair of driving devices 30 are provided, and the pair of driving devices 30 are respectively provided at both ends of the tank body 11; the driving device 30 includes a connecting plate 31 for connecting the ends of a pair of support plates 26, a bracket 32 ​​provided on the ground, and a telescopic cylinder 33 vertically provided on the bracket 32; the telescopic rod 25 of the telescopic cylinder 33 is connected to the connecting plate 31. Specifically, through the synchronous movement of the pair of telescopic cylinders 33, the purpose of driving the heat preservation component 20 to rise and fall can be achieved, so as to adjust the contact area between the heat preservation component 20 and the bottom of the tank body 11, wherein the telescopic cylinder 33 can use an electric push rod or a hydraulic press.

[0028] The upper end of the support 12 in this embodiment is connected to the side wall of the tank body 11 .

[0029] In summary, the heat preservation device for the electrolytic aluminum electrolytic cell of the present embodiment continuously injects flowing water into the heat preservation plate 21 through the circulating water device, and transfers heat to the bottom of the cell body 11 through the contact between the heat preservation plate 21 and the bottom of the cell body 11 (a large amount of heat generated during the electrolysis process is transferred to the water in the heat preservation plate 21 at the bottom through the cell body 11, and the high-temperature water is stored after the water is heated). When it is necessary to keep the electrolyte inside the electrolytic cell warm, the high-temperature water can be re-sent into the heat preservation plate 21, and the heat preservation plate 21 can be placed close to the cell body 11 to keep the cell body 11 warm. When it is necessary to adjust the heat preservation effect (or heat dissipation), the drive The device 30 drives the insulation components 20 to descend synchronously. During the descent, since the initial height (i.e., in a static state without external force) of each insulation board 21 is different, the insulation boards 21 will not all detach, but the insulation board 21 with the lowest height detaches from the bottom wall of the trough body 11. As the height of the insulation component 20 continues to decrease, more insulation boards 21 detach from the bottom wall of the trough body 11. In this way, the contact area between the insulation board 21 and the bottom of the trough body 11 can be adjusted by the descending height of the insulation component 20, thereby adjusting the insulation efficiency or heat dissipation efficiency of the bottom of the trough body 11, so that corresponding adjustments can be made according to the working state of the trough body 11.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat preservation device for an electrolytic aluminum reduction cell, comprising a cell body (11), a support (12) for supporting the cell body (11), characterized in that: It comprises a plurality of heat preservation components (20) arranged below the tank body (11), a driving device (30) for driving the heat preservation components (20) to rise and fall, and a circulating water device connected to the heat preservation components (20); A plurality of the heat-insulating components (20) are distributed along the length direction of the trough body (11), and the heat-insulating components (20) include a plurality of long and hollow heat-insulating plates (21) arranged in parallel with each other, a support plate (26) arranged below the heat-insulating plates (21), a spring (24) for connecting the heat-insulating plates (21) and the support plate (26), a first connecting pipe (22) for connecting adjacent heat-insulating plates (21), and a second connecting pipe (23) for connecting adjacent heat-insulating components (20); in one of the heat-insulating components (20), the distance between each heat-insulating plate (21) and the outer bottom wall of the trough body (11) is different; The heat-insulating plate (21) located at the end of the tank body (11) is connected to the circulating water device, and the length direction of the heat-insulating plate (21) is perpendicular to the length direction of the tank body (11).

2. The heat preservation device for electrolytic aluminum reduction cell according to claim 1, characterized in that: A plurality of the first connecting pipes (22) are provided, and the plurality of the first connecting pipes (22) are distributed along the length direction of the thermal insulation board (21).

3. The heat preservation device for electrolytic aluminum reduction cell according to claim 2, characterized in that: A plurality of the second connecting pipes (23) are provided, and the plurality of the second connecting pipes (23) are distributed along the length direction of the thermal insulation board (21).

4. The heat preservation device for aluminum electrolytic cell according to claim 1, characterized in that: A plurality of sliders (27) are provided on both sides of the insulation board (21); the sliders (27) are evenly distributed along the length direction of the insulation board (21), and the gaps between adjacent sliders (27) are slide grooves (28); the sliders (27) of the insulation board (21) are slidably arranged in the slide grooves (28) of adjacent insulation boards (21).

5. The heat preservation device for aluminum electrolytic cell according to claim 4, characterized in that: The sliding block (27) is a hollow structure and is in communication with the interior of the thermal insulation board (21).

6. The heat preservation device for aluminum electrolytic cell according to claim 1, characterized in that: A pair of the support plates (26) are provided, and the pair of the support plates (26) are respectively arranged at two ends of the insulation plate (21); the length direction of the support plates (26) is perpendicular to the length direction of the insulation plate (21); A pair of the springs (24) are provided, and the pair of the springs (24) are respectively arranged at two ends of the heat preservation plate (21).

7. The heat preservation device for aluminum electrolytic cell according to claim 6, characterized in that: A telescopic rod (25) is arranged inside the spring (24), one end of the telescopic rod (25) is connected to the insulation board (21), and the other end is connected to the support board (26).

8. The heat preservation device for aluminum electrolytic cell according to claim 6, characterized in that: The driving device (30) is provided in pair, and the driving device (30) is respectively arranged at two ends of the tank body (11); The driving device (30) comprises a connecting plate (31) for connecting the ends of a pair of supporting plates (26), a bracket (32) arranged on the ground, and a telescopic cylinder (33) vertically arranged on the bracket (32); the telescopic rod (25) of the telescopic cylinder (33) is connected to the connecting plate (31).

9. The heat preservation device for aluminum electrolytic cell according to claim 1, characterized in that: The upper end of the support (12) is connected to the side wall of the tank body (11).

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