Electrolytic tank shell structure for waste heat recycling

Abstract

The utility model discloses an electrolytic bath shell structure for waste heat recycling, and belongs to the technical field of electrolytic baths, the electrolytic bath shell structure comprises: a shell main body for providing an electrolytic reaction space, the shell main body having a large side wall and an end side wall; and the multiple partition plates are connected to the side wall of the end head and arranged at intervals, and the interval between every two adjacent partition plates is used for containing the heat exchange device, so that the heat exchange device can be attached to the side wall of the end head in a covering mode. The partition plate is arranged on the side wall of the end of the shell body, an original shroud ring structure is replaced, intervals can be provided through the partition plate to contain the heat exchange device, and the installation condition of the heat exchange device is provided, so that heat in the shell body can be effectively transmitted to the heat exchange device, waste heat recovery is achieved, and the heat exchange efficiency is improved. And mounting and debugging of the electrolytic bath side heat exchange device are facilitated, efficient recycling of waste heat of the electrolytic bath side is facilitated, and the heat utilization efficiency of the electrolytic bath can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of electrolytic cells, and in particular, relates to an electrolytic cell shell structure for waste heat recovery. Background Art

[0002] At present, the heat utilization efficiency of electrolytic cells is not high. For example, the DC power consumption of aluminum electrolytic cells is about 13000kWh / t-Al, and the energy utilization rate is less than 50%, of which about 6700kWh / t-Al is lost to the environment in the form of heat. According to the energy balance test of aluminum electrolytic cells, the heat dissipation through the side walls of aluminum electrolytic cells of different cell types accounts for about 30%-40% of the total heat dissipation, which is equivalent to about 2000-2700kWh / t-Al of electricity. Therefore, the existing aluminum electrolytic cells have a high waste heat recovery value.

[0003] The existing aluminum electrolytic cell side walls include large side walls and end side walls, of which the end side wall area accounts for 25%-40% of the total side area. The end side walls of the existing aluminum electrolytic cell series are divided into multiple narrow spaces by multiple sets of ribs and belts, which restricts the installation of the side waste heat recovery device, making it difficult to effectively recycle the waste heat on the side of the end of the cell shell. In addition, there is a strong magnetic field around the aluminum electrolytic cell, and the cell shell has extremely strong magnetism in the magnetic field, which brings inconvenience to the installation and maintenance of the aluminum electrolytic cell waste heat recovery system. Utility Model Content

[0004] The present application aims to solve the technical problem of waste heat recovery and utilization of electrolytic cells to at least a certain extent. To this end, the present application provides an electrolytic cell shell structure for waste heat recovery and utilization, which can provide an installation basis for a heat exchange device, facilitate the installation and commissioning of a heat exchange device on the side of the electrolytic cell, and is beneficial to the efficient recovery and utilization of waste heat on the side of the electrolytic cell, and can improve the thermal utilization efficiency of the electrolytic cell.

[0005] The present application provides an electrolytic cell shell structure for waste heat recovery, which includes:

[0006] The shell body is used to provide a space for electrolytic reaction, and the shell body has a large side wall and an end side wall;

[0007] A plurality of partition plates are connected to the end side wall, the plurality of partition plates are arranged at intervals, and the intervals between adjacent partition plates are used to accommodate a heat exchange device, so that the heat exchange device can be attached to the end side wall.

[0008] In an optional embodiment, a plurality of partition plates are sequentially arranged from one side of the end of the shell body to the other side.

[0009] In an optional embodiment, the partition plates are arranged vertically, and the plurality of partition plates divide the outer side of the end head side wall into a plurality of spaced partitions.

[0010] In an optional embodiment, the partition plate is perpendicular to the end side wall of the shell body.

[0011] In an optional embodiment, the housing further comprises a groove edge plate and a cathode rod, wherein one end of the partition plate extends to the groove edge plate and the other end extends to the bottom of the housing body and the position thereof corresponds to the cathode rod.

[0012] In an optional embodiment, the spacing between adjacent partition plates is [500mm, 700mm].

[0013] In an optional embodiment, the thickness of the partition plate is [20 mm, 40 mm].

[0014] In an optional embodiment, the large surface side wall and the end side wall of the shell body are coated with a magnetic shielding material coating.

[0015] In an optional embodiment, a cradle frame is further included, and the magnetic shielding material coating is also coated on the surfaces of the partition plate, the groove edge plate and the cradle frame.

[0016] In an optional embodiment, the thickness of the magnetic shielding material coating is [1 mm, 3 mm].

[0017] It can be seen from the above technical solution that the beneficial effects of this application are:

[0018] The present application replaces the original belt structure by setting a partition plate on the end side wall of the shell body. The partition plate can provide a spacing to accommodate the heat exchange device, thereby providing installation conditions for the heat exchange device, so that the internal heat of the shell body can be effectively transferred to the heat exchange device, thereby realizing the recovery of waste heat of the shell body. Multiple installation positions are provided by multiple partition plates to facilitate the installation of multiple heat exchange devices, so that most of the heat on the end side wall can be recovered and utilized. In summary, the present application can provide an installation basis for the heat exchange device, facilitate the installation and debugging of the heat exchange device on the side of the electrolytic cell, and is conducive to the efficient recovery and utilization of waste heat on the side of the electrolytic cell, which can improve the thermal utilization efficiency of the electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other embodiments and drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of an embodiment of an electrolytic cell shell structure for waste heat recovery and utilization according to the utility model is shown;

[0021] Figure 2The utility model shows a schematic cross-sectional view of an embodiment of an electrolytic cell shell structure for waste heat recovery at the cell edge;

[0022] Figure 3 A schematic diagram of the configuration of a magnetic shielding material coating according to an embodiment of the present invention is shown.

[0023] Figure numerals: 100, slot shell structure; 110, shell body; 111, large side wall; 112, end side wall; 120, partition plate; 130, slot edge plate; 140, cradle frame; 150, cathode rod; 160, magnetic shielding material coating. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0029] Please refer to Figure 1 In a first aspect of the present application, an embodiment provides an electrolytic cell shell structure for waste heat recovery, which includes a shell body 110 and a plurality of partition plates 120. The shell body 110 is used to provide a space for electrolytic reaction. The shell body 110 is the shell of the electrolytic cell, such as a 200kA series or 500kA series electrolytic cell. The shell body 110 is an existing structure. The shell body 110 has a large side wall 111 and an end side wall 112. The large side wall 111 is an outer wall with a larger area on both sides of the shell body 110, and the end side wall 112 is an outer wall at both ends of the shell body 110. The partition plates 120 of this embodiment are made of steel plates, and other high-strength material plates, such as metal alloy plates, can also be made of high-strength organic material plates, such as carbon fiber composite material plates. The use of steel plates can improve the structural strength of the shell body 110 at the end side walls 112. The shape of the partition plates 120 is rectangular, square or trapezoidal, and other regular shapes can also be used. There are multiple partition plates 120, such as 5 to 8. Part of the edge of the partition plate 120 is connected to the end side wall, and the connection is achieved by welding. Other methods can also be used. Multiple partition plates 120 are arranged at intervals, and there is a certain distance between adjacent partition plates 120. The intervals between adjacent partition plates 120 are used to accommodate a heat exchange device, so that the heat exchange device can be attached to the end side wall 112. The heat exchange device uses an existing device capable of heat exchange, such as a heat exchange pipe, with a heat transfer medium inside. The above arrangement facilitates the effective recovery and utilization of the waste heat of the end side wall 112 of the electrolytic cell, and also facilitates the installation of a waste heat recovery device, such as a heat exchange device, to form a preheating utilization system.

[0030] The heat utilization efficiency of the existing electrolytic cells is not high. This is because the large side walls 111 and the end side walls 112 of the electrolytic cell will dissipate heat outward, and the side walls cause a heat loss rate of 30%-40%. The existing technology does not take into account the recovery and utilization of this part of the waste heat. Therefore, when designing the electrolytic cell, the heat exchange device cannot be attached to the side wall at the side wall position, and it is difficult to install the heat exchange device. For example, the end side wall 112 of the aluminum electrolytic cell shell currently adopts a circumferential belt design, which makes it impossible for the heat exchange device to be directly installed on the end side wall 112. The heat exchange efficiency installed here is low, the application effect is not good, and the waste heat dissipated by the end side wall 112 cannot be fully recovered and utilized. The present application replaces the original belt structure by setting a partition plate 120 on the end side wall 112 of the shell body 110. The partition plate 120 can provide a spacing to accommodate the heat exchange device, providing installation conditions for the heat exchange device, so that the internal heat of the shell body 110 can be effectively transferred to the heat exchange device, thereby realizing the recovery of waste heat of the shell body 110. Multiple installation positions are provided by multiple partition plates 120 to facilitate the installation of multiple heat exchange devices, so that most of the heat of the end side wall 112 can be recovered and utilized. In summary, the present application can provide an installation basis for the heat exchange device, facilitate the installation and debugging of the heat exchange device on the side of the electrolytic cell, and is beneficial to the efficient recovery and utilization of waste heat on the side of the electrolytic cell, which can improve the thermal utilization efficiency of the electrolytic cell.

[0031] Please refer to Figure 2 In an optional embodiment, a plurality of partition plates 120 are sequentially arranged from one side of the end of the shell body 110 to the other side, that is, arranged from one side of the end side wall 112 to the other side along the two sides of the end, and a plurality of partition plates 120 are sequentially spaced a certain distance apart to form intervals. In an optional embodiment, the spacing between adjacent partition plates 120 is equal. In an optional embodiment, the partition plates 120 are arranged vertically, and a plurality of partition plates 120 are at the end side wall 112 to divide the outer side of the end side wall 112 into a plurality of different interval partitions, and a heat exchange device can be placed at each interval partition for easy accommodation and installation. The heat exchange device is attached to the end side wall 112, so that each interval partition between adjacent partition plates 120 has a heat exchange device, and the heat transfer efficiency is improved through a plurality of interval partitions.

[0032] In an optional embodiment, the partition plate 120 is perpendicular to the end side wall 112 of the shell body 110, and multiple partition plates 120 are arranged side by side and vertically, thus forming a structure of multiple partition plates 120 vertically perpendicular to the end side wall 112, and the spacing between adjacent partition plates 120 is equal, such as steel plates can provide the function of ribs. In an optional embodiment, it also includes a groove edge plate 130 and a cathode rod 150, and the cathode rod 150 is a steel rod. One end of the partition plate 120 extends to the groove edge plate 130, and the other end extends to the bottom of the shell body 110 and the position corresponds to the cathode rod 150, such as the top end of the steel plate is welded to the groove edge plate 130 of the electrolytic cell, and the bottom end of the steel plate extends all the way to the bottom of the shell body 110, such as extending to be flush with the bottom end of the cathode rod 150, which also helps to prevent the end side wall 112 of the shell body 110 from deforming.

[0033] In an optional embodiment, the spacing between adjacent partition plates 120 is [500mm, 700mm], such as 500mm, 600mm or 700mm. The spacing between adjacent partition plates 120 needs to take into account the size of the heat exchange device. When the heat exchange device is attached to the end side wall 112, the spacing between adjacent partition plates 120 is greater than the size of the heat exchange device. In an optional embodiment, the thickness of the partition plate 120 is [20mm, 40mm], such as 20mm, 30mm or 40mm. The thickness of the partition plate 120 needs to be set to first meet the requirement of effectively transferring heat and then enhance the structural strength of the end side wall 112.

[0034] Please refer to Figure 3 In an optional embodiment, the large side wall 111 and the end side wall 112 of the shell body 110 are coated with a magnetic shielding material coating 160, that is, the influence of the magnetic field is reduced at the large side wall 111 and the end side wall 112, thereby reducing the influence on the electrolytic reaction in the shell body 110, avoiding uneven distribution, and making the heat dissipation of the shell body on the large side wall 111 and the end side wall 112 more stable, avoiding the situation of local temperature rise; the magnetic shielding material coating 160 is a layer structure formed by the magnetic shielding material coated on the outer wall of the shell body 110, and the magnetic shielding material is such as industrial silicon steel sheet, silicon nickel alloy, etc. In an optional embodiment, a cradle 140 is also included, and the magnetic shielding material coating 160 is also coated on the surface of the partition plate 120, the groove edge plate 130 and the cradle frame 140, such as the outer surface of the cradle frame 140, the upper and lower surfaces of the groove edge plate 130, and the two side surfaces of the partition plate 120. In an optional embodiment, the thickness of the magnetic shielding material coating 160 is [1mm, 3mm], such as 1mm, 2mm or 3mm. The above thickness range of the magnetic shielding material coating 160 has a good magnetic shielding effect. The thickness can be determined according to the magnetic field strength and different conditions of the electrolytic cell. After the outer wall of the aluminum electrolytic cell is coated with the magnetic shielding material coating 160, the magnetic field strength around the shell of the aluminum electrolytic cell is reduced.

[0035] After adopting this application, the overall structure of the electrolytic cell is basically not affected, the problem of difficulty in recovering waste heat on the side of the end of the aluminum electrolytic cell is solved, the recoverable waste heat area on the side of the aluminum electrolytic cell is significantly increased, the waste heat recovery efficiency on the side of the aluminum electrolytic cell is improved, and it is beneficial to the installation and commissioning of the waste heat recovery system on the side of the aluminum electrolytic cell. After specific implementation, the waste heat recovery area on the side of the aluminum electrolytic cell increases by 33%-67% compared with before application, and the recoverable heat dissipation increases by about 800kWh / t-Al compared with before application, and the implementation effect is good.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", "optional example" or "optional implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0037] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0038] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electrolytic cell shell structure for waste heat recovery, characterized in that: include: A shell body (110) is used to provide a space for electrolytic reaction, wherein the shell body (110) has a large side wall (111) and an end side wall (112); A plurality of partition plates (120) are connected to the end side wall (112); the plurality of partition plates (120) are arranged at intervals, and the intervals between adjacent partition plates (120) are used to accommodate a heat exchange device, so that the heat exchange device can be attached to the end side wall (112).

2. The electrolytic cell shell structure for waste heat recovery according to claim 1, characterized in that: The plurality of partition plates (120) are sequentially arranged from one side to the other side of the end of the shell body (110).

3. The electrolytic cell shell structure for waste heat recovery according to claim 2, characterized in that: The partition plates (120) are arranged vertically, and a plurality of the partition plates (120) divide the outer side of the end head side wall (112) into a plurality of partitioned areas.

4. The electrolytic cell shell structure for waste heat recovery according to claim 3 is characterized in that: The partition plate (120) is perpendicular to the end side wall (112) of the shell body (110).

5. The electrolytic cell shell structure for waste heat recovery according to any one of claims 1 to 4, characterized in that: It also includes a groove edge plate (130) and a cathode rod (150), one end of the partition plate (120) extends to the groove edge plate (130), and the other end extends to the bottom of the shell body (110) and the position corresponds to the cathode rod (150).

6. The electrolytic cell shell structure for waste heat recovery according to claim 1, characterized in that: The distance between adjacent partition plates (120) is [500mm, 700mm].

7. The electrolytic cell shell structure for waste heat recovery according to claim 6, characterized in that: The thickness of the partition plate (120) is [20 mm, 40 mm].

8. The electrolytic cell shell structure for waste heat recovery according to claim 5, characterized in that: The large side wall (111) and the end side wall (112) of the shell body (110) are coated with a magnetic shielding material coating (160).

9. The electrolytic cell shell structure for waste heat recovery according to claim 8, characterized in that: A cradle frame (140) is also included, and the magnetic shielding material coating (160) is also coated on the surfaces of the partition plate (120), the groove edge plate (130) and the cradle frame (140).

10. The electrolytic cell shell structure for waste heat recovery according to claim 8, characterized in that: The thickness of the magnetic shielding material coating (160) is [1 mm, 3 mm].

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