Novel aluminum electrolysis cell side large-surface heat preservation configuration structure

Abstract

The utility model discloses a novel aluminum electrolysis cell side large-surface heat-preservation configuration structure which is mainly applied to heat-preservation structure design construction and configuration installation of a side large surface of an aluminum electrolysis cell. The aluminum electrolysis cell is characterized in that a cell cover plate structure arranged at the side part of the aluminum electrolysis cell at the middle side part space position of the upper part of the horizontal smoke hood plate and the cell shell is formed by configuring an upper part structure and a lower part structure of a heavy vertical heat preservation box wall and a light heat preservation cell cover plate; a heavy vertical heat preservation box partition wall is arranged in the length direction of the aluminum electrolysis cell and located on a horizontal edge plate on the upper portion of a cell shell of the aluminum electrolysis cell. Performing heat insulation on the side surface of the upper part of the cell shell in the pole changing operation space of the aluminum electrolysis cell and a high-temperature area at the end of an anode carbon block; the light heat preservation groove cover plate is formed by combining and assembling an aluminum alloy frame structure and a light heat preservation refractory fiber material and is located and installed between the upper portion of a heavy heat preservation wall structure and a horizontal smoke hood plate of the aluminum electrolysis cell, and heat insulation and heat preservation are carried out on the upper portion of the pole changing operation space side of the aluminum electrolysis cell.

Description

[0001] TECHNICAL FIELD: A new type of aluminum electrolysis cell side large surface heat preservation configuration structure, mainly applied to the equipment manufacturing of aluminum electrolysis cell and the production of aluminum electrolysis cell.

[0002] BACKGROUND: Aluminum electrolysis cell is an electrolytic technology equipment for producing aluminum liquid from alumina through thermal electrochemical reaction. The thermal balance design of the aluminum electrolysis cell is related to the energy balance and current efficiency of the aluminum electrolysis cell, and determines the operation process. The side cover plate of the aluminum electrolysis cell is a movable heat preservation component of the side of the aluminum electrolysis cell. The purpose of the existing technology of the cover plate of the aluminum electrolysis cell is to realize two functions, one is to preserve the space for the anode replacement of the aluminum electrolysis cell to ensure the thermal balance of the aluminum electrolysis cell, the second is to facilitate the anode replacement and process maintenance of the aluminum electrolysis cell, the third is to prevent the disordered discharge of electrolysis heat smoke. The third is to make the cover plate have the function of climbing ladder during the anode replacement process. The fourth is that the temperature of the heat smoke in the anode replacement space of the aluminum electrolysis cell needs to match the temperature of the smoke purification system, so the heat balance temperature needs to be kept between 100℃ and 130℃, that is, the cover plate of the aluminum electrolysis cell needs to have certain heat dissipation function.

[0003] The existing upper part of the aluminum electrolysis cell belongs to the heat dissipation type aluminum electrolysis cell from the perspective of thermal balance. However, with the development of large-scale aluminum electrolysis cell type and the increase of energy saving, emission reduction and carbon reduction efforts, the temperature of the anode replacement space of the aluminum electrolysis cell needs to be re-set. The existing aluminum electrolysis cell cover plate heat preservation device and operation process cannot meet the needs of electrolytic aluminum innovation process, and the cover plate needs to be improved to match the process requirements of large-scale aluminum electrolysis cell. The main defects of the existing aluminum electrolysis cell cover plate are: first, the area and volume of the cover plate increase with the increase of the size of the aluminum electrolysis cell, and the total amount also increases, which is not conducive to the operation of workers. Second, the cover plate has poor heat preservation performance. Third, it is not conducive to human-machine collaborative operation. In view of the above defects caused by the traditional structure configuration of the existing large-scale aluminum electrolysis cell side cover plate structure, the engineering and technical personnel of the electrolytic aluminum industry are actively trying to improve and innovate.

[0004] SUMMARY: In order to improve the heat preservation performance of the cover plate of the aluminum electrolysis cell, reduce the intensity of the maintenance of the aluminum smelting workers, improve the safety of the smelting workers in the maintenance operation process, and realize the unity and coordination of human-machine operation, a new type of 400KA large-scale aluminum electrolysis cell side heat preservation structure is proposed. The main design idea of the technical scheme is to mix the mechanical lifting and manual moving operation modes according to the heat preservation requirements of different regions of the side cover plate, and to meet the operation process and heat preservation process requirements of the aluminum electrolysis cell side.

[0005] The application discloses a novel aluminum electrolysis cell side large surface heat preservation configuration structure, which is characterized by the following: a cell cover plate structure is installed on the horizontal smoke cover plate and the upper middle side space of the cell shell of the aluminum electrolysis cell, and is composed of a heavy vertical heat preservation box wall and a light heat preservation cell cover plate; the heavy vertical heat preservation box wall is arranged along the length direction of the aluminum electrolysis cell, and is installed on the horizontal along plate on the upper part of the cell shell of the aluminum electrolysis cell; the heat insulation and preservation of the high temperature area of the upper part of the cell shell of the aluminum electrolysis cell and the end of the anode carbon block during the anode changing operation of the aluminum electrolysis cell are implemented; the light heat preservation cell cover plate is composed of an aluminum alloy frame structure and a light heat preservation refractory fiber material, is installed between the upper part of the heavy heat preservation wall structure and the horizontal smoke cover plate of the aluminum electrolysis cell, and implements the heat insulation and preservation of the upper part of the side of the aluminum electrolysis cell during the anode changing operation.

[0006] According to the technical scheme, the heavy vertical heat preservation box wall is composed of a metal cavity shell and a heat preservation refractory material.

[0007] According to the technical scheme, the length of the heavy vertical heat preservation box wall is greater than the length of the end of the anode carbon block in the aluminum electrolysis cell, the height of the heavy vertical heat preservation box wall is greater than or equal to the set height of the anode carbon block initially installed in the aluminum electrolysis cell, and a lifting ring is arranged on the side of the heavy vertical heat preservation box wall.

[0008] According to the technical scheme, the light heat preservation cell cover plate is composed of an aluminum alloy rectangular support frame, upper and lower cover plates and light heat preservation insulation materials filled between the upper and lower aluminum alloy cover plates.

[0009] According to the technical scheme, a climbing step made of a rectangular aluminum alloy square tube is arranged on the aluminum alloy frame of the light heat preservation cell cover plate, and a hand-held handle is arranged on the climbing step.

[0010] According to the technical scheme, insulating clamping plates are arranged at the upper and lower ends of the light heat preservation cell cover plate, and the insulating clamping plates are used to implement the insulation configuration between the upper horizontal cover plate of the aluminum electrolysis cell and the heavy vertical heat preservation box wall at the bottom.

[0011] According to the technical scheme, in order to facilitate manual operation, the width of each light heat preservation cell cover plate is less than the width of the heavy vertical heat preservation box wall, and a plurality of light heat preservation cell cover plates can be arranged on the upper part of one heavy vertical heat preservation box wall.

[0012] The feature of the new aluminum electrolysis cell side large surface heat preservation configuration structure according to the above technical solution is that when the aluminum electrolysis cell is maintained, a light heat preservation tank cover plate can be moved to maintain the aluminum electrolysis cell. That is, two or more light heat preservation tank cover plates and a heavy vertical heat preservation box can be used to construct a heat preservation device for the aluminum electrolysis cell side area position corresponding to the end of two anode carbon blocks. Moreover, the light heat preservation tank cover plate has the functions of climbing ladder and manual operation and movement.

[0013] The feature of the new aluminum electrolysis cell side large surface heat preservation configuration structure according to the above technical solution is that when the aluminum electrolysis cell is maintained, a light heat preservation tank cover plate can be moved to maintain the aluminum electrolysis cell. That is, two or more light heat preservation tank cover plates and a heavy vertical heat preservation box can be used to construct a heat preservation device for the aluminum electrolysis cell side area position corresponding to the end of two anode carbon blocks. Moreover, the light heat preservation tank cover plate has the functions of climbing ladder and manual operation and movement.

[0014] Compared with the existing aluminum electrolysis cell heat preservation device, the new aluminum electrolysis cell side large surface heat preservation configuration structure has the following technical advantages and significant technical progress features. First, the bottom of the heat preservation device adopts a heavy vertical heat preservation box with high temperature resistance and high structural strength corresponding to the length of two anode ends, and is assembled and disassembled by a multi-functional overhead traveling crane. This not only enhances the heat preservation function of the high temperature area, but also realizes mechanized operation, thereby reducing the labor amount of manual operation. Second, the upper part of the heavy vertical heat preservation box is divided into two parts and operated by a light heat preservation tank cover plate. This not only improves the heat preservation function of the aluminum electrolysis cell, but also reduces the labor intensity of workers by moving and buckling the relatively small light tank cover plate according to the process conditions of different areas in the aluminum electrolysis cell. Third, the light heat preservation tank cover plate is directly provided with a rectangular aluminum alloy square tube step outside the rectangular aluminum alloy frame, which has the function of climbing ladder and can reduce the construction cost and improve the overall strength of the structure.

[0015] BRIEF DESCRIPTION OF DRAWINGS: The technical solution and technical features of the new aluminum electrolysis cell side large surface heat preservation configuration structure will be clearer by reading the embodiments and the drawings.

[0016] Figure 1 It is a front view of the new aluminum electrolysis cell side large surface heat preservation configuration structure.

[0017] Figure 2 It is a side view of Figure 1

[0018] Figure 3 ​This diagram illustrates the state of the side insulation process of an aluminum electrolytic cell during localized process treatment and maintenance, using a novel large-area side insulation configuration structure of the present invention.

[0019] Figure 4 This is a process diagram showing the movable lightweight insulation tank cover during localized treatment.

[0020] Figure 5 This diagram illustrates the state of the side insulation process of an aluminum electrolytic cell during electrode replacement operations, using a novel large-area side insulation configuration structure of the present invention.

[0021] Figure 6 This is a process diagram of the lightweight insulation tank cover plate during the electrode switching operation of this invention.

[0022] Figure 7 Process diagram of the heavy-duty vertical insulation box during the electrode switching operation of this invention.

[0023] The diagram shows: 1. Lightweight insulated tank cover plate, 1-1 aluminum alloy rectangular tube frame, 1-2 upper cover plate, 1-3 lower cover plate, 1-4 lightweight refractory fiber thermal insulation material, 1-5 upper insulating plate, 1-6 lower insulating plate, 1-7 rectangular tube step, 1-8 operating handle, 2. Heavy-duty vertical insulated box, 2-1 steel structure box cavity, 2-2 thermal insulation refractory material, 2-3 lifting lugs, 3. horizontal edge of tank shell, 4. upper horizontal smoke hood plate, 5. vertical plate mounting concave groove, 6. anode carbon block.

[0024] Detailed Implementation: The specific implementation of the novel aluminum electrolytic cell side surface insulation configuration structure described in this invention will be more clearly shown in conjunction with the accompanying drawings.

[0025] Example 1, as Figure 1 and Figure 2 As shown in the figure, the novel aluminum electrolysis cell side insulation configuration structure described in this embodiment consists of two main components: an upper lightweight insulation cell cover plate 1 and a lower heavy-duty vertical insulation box 2. The bottom of the heavy-duty vertical insulation box 2 is mounted on the upper part of the horizontal edge plate 3 of the aluminum electrolysis cell shell; the bottom of the lightweight insulation cell cover plate 1 is mounted on the heavy-duty vertical insulation box 2, and the upper part of the lightweight insulation cell cover plate 1 is fastened to the horizontal fume hood plate 4. Figure 1 As shown, two lightweight insulation panels are installed along the length of a heavy-duty vertical insulated box 1. Of course, in actual production, one to three panels can also be installed.

[0026] like Figure 1 and Figure 2As shown, the lightweight insulated tank cover 1 of this embodiment is constructed from an aluminum alloy rectangular square tube 1-1, an upper cover plate 1-2, a lower cover plate 1-3, and a fiber insulation material 1-3 sandwiched in between. Insulating plates 1-4 and 1-5 are provided at the upper and lower ends of the lightweight insulated tank cover 1. To facilitate the smelter's work on the upper part of the aluminum electrolysis cell during electrode changing operations, a rectangular square tube step 1-6 made of aluminum alloy square tube is constructed on the upper part of the lightweight insulated tank cover 1. To facilitate the smelter's movement and opening of the lightweight insulated tank cover, a lifting handle made of aluminum alloy square tube is provided on the rectangular square tube step 1-7.

[0027] On the upper part of a heavy-duty vertical insulated box 2, multiple lightweight insulated tank covers 1 are correspondingly installed. The purpose is to improve the insulation performance of the lightweight insulated tank covers 1. Despite the increased weight per unit area due to the addition of structural materials, the weight of a single insulated tank cover 1 is reduced relative to the larger volume. This allows workers to selectively operate and open different lightweight tank covers according to the process conditions of different electrolysis zones. This design not only reduces the labor intensity of operators and simplifies operation, but also reduces heat loss within the electrolytic cell during maintenance work due to the small area of ​​the openable and closed lightweight insulated tank covers 1. This further contributes to improving the stability of the thermal equilibrium temperature in the electrode switching working space within the aluminum electrolytic cell.

[0028] like Figure 1 Figure 2 As shown, the heavy-duty vertical insulated box 2, installed on the upper part of the aluminum electrolysis cell shell, at the end of the anode carbon block, and at the side insulation bottom, is a box-shaped steel structure. The steel structure box cavity 2-1 is filled with high-temperature resistant heat-insulating and refractory material 2-2. Designing the heavy-duty vertical insulated box 2 as a high-strength box-shaped 2-1 structure, and directly installing it in the concave groove 5 of the horizontal edge plate 3 on the upper part of the aluminum electrolysis cell shell, not only increases the overall structural stability and support strength but also facilitates hoisting and positioning operations using a multi-functional overhead crane and the lifting lugs provided on the heavy-duty vertical insulated box.

[0029] like Figure 3 and Figure 4 As shown: During the electrolytic cell production process, if maintenance is required on a localized area of ​​the aluminum electrolytic cell, simply lift and move one of the lightweight insulated tank covers 1 on top of the cell to perform the maintenance. After maintenance, simply replace and fasten the lightweight insulated tank cover 1 back into place.

[0030] like Figure 5 , Figure 6 , Figure 7As shown, if an electrode replacement operation is required during the production of an electrolytic cell, the two upper lightweight insulation tank cover plates 1 on the side of the electrolytic cell involving the related area in the electrode replacement operation area are first removed, and then the heavy-duty vertical insulation box 2 at the bottom is moved out by a multi-functional overhead crane to carry out the electrode replacement operation. After the electrode replacement operation is completed, the heavy-duty vertical insulation box 2 and the upper lightweight insulation tank cover plates 1 are then reset.

[0031] Technological advancements and benefits: By employing the novel large-area side insulation configuration structure described in this invention for insulation operations in aluminum electrolysis cells, the temperature of the electrode-changing working space within the electrolysis cell can be increased to over 150℃ after application testing. The anode covering material of the aluminum electrolysis cell can be reduced by 3cm. Electricity consumption per ton of aluminum production can be reduced by 50kWh. The increased temperature and improved thermal balance stability within the electrode-changing working space of the aluminum electrolysis cell also facilitate the utilization of waste heat from the electrolysis flue gas.

Claims

1. A novel side surface insulation configuration structure for an aluminum electrolytic cell, characterized in that: The tank cover structure, installed on the upper middle side space of the horizontal fume hood and the tank shell, is composed of two parts: a heavy-duty vertical insulated box wall and a lightweight insulated tank cover. The heavy-duty vertical insulated box wall is arranged along the length of the aluminum electrolysis cell and is located on the horizontal edge plate on the upper part of the aluminum electrolysis cell shell, providing heat insulation for the upper side of the tank shell and the high-temperature area at the end of the anode carbon block in the aluminum electrolysis cell electrode switching operation space. Its lightweight insulated tank cover is constructed using an aluminum alloy frame structure and a combination of lightweight insulated and refractory fiber materials. It is installed between the upper part of the heavy-duty insulated wall structure and the horizontal smoke hood of the aluminum electrolysis tank, providing thermal insulation for the upper part of the aluminum electrolysis tank's electrode switching operation space.

2. The novel aluminum electrolytic cell side surface insulation configuration structure according to claim 1, characterized in that: Its heavy-duty vertical insulated box wall is constructed by combining a metal box shell and insulated and fire-resistant materials; Its metal box shell is a concave metal box shell structure, and the heavy-duty vertical insulated box wall is filled with heat-insulating and fire-resistant materials.

3. A novel large-area heat preservation configuration structure for the side of an aluminum electrolytic cell according to claim 1, characterized in that; The length of its heavy-duty vertical insulated box wall is greater than the length of the end of the anode carbon block in the aluminum electrolysis cell, and the height of its heavy-duty vertical insulated box wall is greater than or equal to the initial height of the anode carbon block installed in the aluminum electrolysis cell. Lifting rings are installed on the side of the heavy-duty vertical insulated box wall.

4. A novel large-area heat insulation configuration structure for the side of an aluminum electrolytic cell according to claim 1, characterized in that: Its lightweight insulated groove cover is constructed of an aluminum alloy rectangular support frame and upper and lower cover plates, with lightweight thermal insulation material filling the space between the upper and lower aluminum alloy cover plates.

5. A novel large-area heat insulation configuration structure for the side of an aluminum electrolytic cell according to claim 1, characterized in that: in The lightweight insulated trough cover has an aluminum alloy frame with steps made of rectangular aluminum alloy square tubes, and handles are installed on the steps.

6. A novel large-area heat insulation configuration structure for the side of an aluminum electrolytic cell according to claim 1, characterized in that: in Insulating plates are installed at both the top and bottom of the lightweight insulated tank cover. The insulating plates are used to implement an insulation configuration between the upper horizontal cover plate of the aluminum electrolysis tank and the bottom heavy-duty vertical insulated box wall.

7. A novel large-area heat preservation configuration structure for the side of an aluminum electrolytic cell according to claim 1, characterized in that: To facilitate manual operation, the width of each lightweight insulation tank cover should be smaller than the width of the heavy-duty vertical insulation box wall. Multiple lightweight insulation tank covers can be installed on the upper part of a heavy-duty vertical insulation box wall.

8. A novel large-area heat insulation configuration structure for the side of an aluminum electrolytic cell according to claim 1, characterized in that: When performing production and maintenance on aluminum electrolysis cells, a lightweight insulated tank cover can be moved to perform maintenance work on the aluminum electrolysis cells.

9. A novel large-area heat insulation configuration structure for the side of an aluminum electrolytic cell according to claim 1, characterized in that: in When performing insulation maintenance on aluminum electrolytic cells, the lightweight insulation cell cover is manually moved, while the heavy-duty vertical insulation box wall is moved and installed using a crane, i.e., a multi-functional overhead crane, during the electrode replacement operation.

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