A waste heat recovery device for aluminum electrolysis tank

Abstract

The utility model provides a waste heat recovery device for an electrolytic aluminum tank, comprising an outer wall of the electrolytic aluminum tank, the outer wall of the electrolytic aluminum tank extends outwardly to form a mounting surface, and the mounting surface and the outer wall of the electrolytic aluminum tank form a cavity; a delivery pipe, which is arranged in the cavity; a heat preservation cover, the heat preservation cover is adapted to the mounting surface, and the heat preservation cover comprises a cover plate and a fixing surface; a water tank, which is communicated with one end of the delivery pipe, and a water pump is arranged on the delivery pipe; a temperature monitor, which is arranged on the outer side of the cover plate; wherein a first pipe hole and a second pipe hole are respectively opened on opposite sides of the mounting surface; the cover plate is snap-connected with the mounting surface; the temperature in a sealed interval formed by the mounting surface and the heat preservation cover is monitored by the temperature monitor, and when the appropriate temperature is reached, the water pump is turned on to pump cold water in the water tank into the delivery pipe, and the delivery pipe is heated by the heat diffused from the wall of the electrolytic aluminum tank, so that the heat can be effectively utilized, and resource waste is avoided, and at the same time, the low temperature in the sealed interval is avoided, resulting in heating failure.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic aluminum production, in particular to a waste heat recovery device for an electrolytic aluminum tank. Background Art

[0002] The electrolytic aluminum industry is an important basic industry in my country. Modern electrolytic aluminum industry production adopts cryolite-alumina molten salt electrolysis method. This method uses molten cryolite as solvent, alumina as solute, carbonite as anode, and aluminum liquid as cathode. After a strong direct current is passed through, an electrochemical reaction is carried out at the two electrodes in the electrolytic aluminum cell at 950℃-970℃.

[0003] However, the electrolytic aluminum industry is also a high-energy-consuming industry. Under the general trend of increasingly tight energy demand and increasingly stringent environmental protection, the energy consumption of electrolytic aluminum directly determines the development of the enterprise. Therefore, it is a general trend to improve the energy utilization rate of the electrolytic aluminum industry and reduce energy consumption.

[0004] However, when the existing aluminum electrolytic cells are in use, a large amount of heat will be generated during the aluminum electrolysis process, and this heat will diffuse into the workshop through the outer wall of the aluminum electrolytic cell. If this diffused heat is not utilized, unnecessary waste will occur. Utility Model Content

[0005] The utility model aims to provide a waste heat recovery device for an aluminum electrolytic cell, so as to solve the problem in the above-mentioned background technology that a large amount of heat will be generated during the use of the aluminum electrolytic cell, and if the heat is not utilized, unnecessary waste will occur.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A waste heat recovery device for an aluminum electrolytic cell, comprising:

[0008] The outer wall of the aluminum electrolytic tank extends outwardly to form a mounting surface, and the mounting surface and the outer wall of the aluminum electrolytic tank form a cavity;

[0009] A delivery pipe, disposed in the cavity;

[0010] A heat preservation cover, the heat preservation cover is matched with the mounting surface, and the heat preservation cover comprises a cover plate and a fixing surface;

[0011] A water tank is connected to one end of the delivery pipe, and a water pump is provided on the delivery pipe;

[0012] A temperature monitor is arranged on the outer side of the cover plate;

[0013] Wherein, a first pipeline hole and a second pipeline hole are respectively opened on two opposite sides of the installation surface; and the cover plate is snap-fitted and connected with the installation surface.

[0014] Preferably, the delivery tube is coiled in the cavity in a serpentine shape.

[0015] Preferably, the first pipeline hole and the second pipeline hole are staggered, and the two end openings of the delivery pipe pass through the first pipeline hole and the second pipeline hole respectively.

[0016] Preferably, sealing rings are provided in both the first pipeline hole and the second pipeline hole.

[0017] Preferably, grooves matching the end surface of the mounting surface are formed around the inner side of the cover plate, and the end surface of the mounting surface can be snapped into the grooves.

[0018] Preferably, a thermal insulation layer is provided on the inner side of the cover plate, a thermal insulation layer is provided on the inner side of the mounting surface, and a sealing layer is provided in the groove.

[0019] Preferably, a thermal conductive coating is applied on the outer wall of the aluminum electrolytic cell.

[0020] Compared with the prior art, the utility model has the following beneficial effects: a mounting surface and a heat-insulating cover are provided on the outer wall of the electrolytic aluminum cell to form a sealed interval, a delivery pipe is provided in the interval, heat diffuses from the wall of the electrolytic aluminum cell and enters the interval to heat the water in the delivery pipe, so that the heat generated during the use of the electrolytic aluminum cell can be effectively utilized, thereby avoiding waste of resources; and the temperature in the interval is monitored by a temperature monitor, and when the appropriate temperature is reached, a water pump is turned on to pump cold water in the water tank into the delivery pipe, so that the cold water is heated by heat when flowing through the sealed interval, thereby avoiding the situation where the temperature in the sealed interval is too low to heat the cold water, resulting in heating failure. At the same time, the user can also use the temperature monitor to choose the appropriate time to pump water according to the water temperature requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the installation of the delivery pipe of the embodiment of the utility model;

[0024] Figure 3 It is a schematic structural diagram of a heat preservation cover according to an embodiment of the utility model.

[0025] Figure numerals: 1. outer wall of electrolytic aluminum cell; 2. mounting surface; 21. first pipe hole; 22. first pipe hole; 23. thermal insulation layer; 3. delivery pipe; 4. thermal insulation cover; 41. cover plate; 42. fixing surface; 5. water tank; 6. water pump; 7. temperature monitor; 8. groove; 9. thermal insulation layer. DETAILED DESCRIPTION

[0026] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships conventionally placed when the product of the present invention is used, or are directions or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0031] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0032] like Figures 1 to 3 As shown, the embodiment of the utility model provides a waste heat recovery device for an electrolytic aluminum cell, comprising:

[0033] An outer wall 1 of the aluminum electrolytic tank, wherein the outer wall 1 of the aluminum electrolytic tank extends outwardly to form a mounting surface 2, and the mounting surface 2 and the outer wall 1 of the aluminum electrolytic tank form a cavity;

[0034] A delivery pipe 3 is arranged in the cavity;

[0035] A heat preservation cover 4, wherein the heat preservation cover 4 is matched with the mounting surface 2, and the heat preservation cover 4 comprises a cover plate 41 and a fixing surface 42;

[0036] A water tank 5 is connected to one end of the delivery pipe 3, and a water pump 6 is provided on the delivery pipe 3;

[0037] A temperature monitor 7, arranged outside the cover plate 41;

[0038] The first pipe hole 21 and the second pipe hole 22 are respectively opened on two opposite sides of the installation surface 2 ; the cover plate 41 is snap-connected with the installation surface 2 .

[0039] During use, the temperature in the cavity is monitored by a temperature monitor 7. When the appropriate temperature is reached, the water pump 6 is turned on to pump the cold water in the water tank 5 into the delivery pipe 3, so that the cold water flows in the delivery pipe 3. The heat generated during the use of the electrolytic aluminum cell is diffused from the wall of the electrolytic aluminum cell, which can heat the cold water.

[0040] The mounting surface 2 on the outer wall 1 of the aluminum electrolytic cell and the insulation cover 4 form an enclosed space. When the heat diffuses from the wall of the aluminum electrolytic cell, it can be concentrated in the enclosed space and heat the cold water flowing through the delivery pipe 3. Therefore, the heat generated during the use of the aluminum electrolytic cell can be effectively utilized, avoiding waste of resources. The temperature in the enclosed space is monitored by the temperature monitor 7, and the water pump 6 is turned on to pump water only when the appropriate temperature is reached, avoiding the situation where the temperature in the enclosed space is too low to heat the cold water, resulting in heating failure. At the same time, the user can also use the temperature monitor 7 to choose the appropriate time to pump water according to the water temperature requirement.

[0041] In order to ensure the heating time of the cold water flowing through the delivery pipe 3, the delivery pipe 3 is coiled in the cavity in a serpentine shape.

[0042] Further, such as Figure 2 As shown, the first pipe hole 21 and the second pipe hole 22 are staggered. Specifically, the first pipe hole 21 is located on the upper side of a mounting surface 2, and the second pipe hole 22 is located on the lower side relative to the mounting surface 2. The pipe mouth of the delivery pipe 3 connected to one end of the water tank 5 passes through the first pipe hole 21, and the other end passes through the second pipe hole 22.

[0043] In order to ensure sealing and prevent heat loss, sealing rings are provided in the first pipe hole 21 and the second pipe hole 22 .

[0044] Further, such as Figure 3 As shown, the inner side of the cover plate 41 is provided with grooves 8 matching the end surface of the mounting surface 2 , and the end surface of the mounting surface 2 can be snapped into the grooves 8 , which facilitates the removal and installation of the thermal insulation cover 4 .

[0045] Specifically, a thermal insulation layer 9 is provided on the inner side of the cover plate 41 to prevent the temperature near the device from being too high and affecting the user's use; a thermal insulation layer 23 is provided on the inner side of the mounting surface 2 to prevent heat from being lost too quickly, thereby maximizing the use of heat; a sealing layer is provided in the groove 8 to ensure the sealing of the device.

[0046] In order to ensure that more heat can be diffused into the closed space formed by the mounting surface 2 and the thermal insulation cover 4, a thermal conductive coating is applied on the outer wall 1 of the electrolytic aluminum tank.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A waste heat recovery device for an aluminum electrolytic cell, characterized in that: include: An outer wall (1) of an aluminum electrolytic cell, wherein the outer wall (1) of the aluminum electrolytic cell extends outwardly on all sides to form a mounting surface (2), and the mounting surface (2) and the outer wall (1) of the aluminum electrolytic cell form a cavity; A delivery pipe (3) is arranged in the cavity; A heat-insulating cover (4), the heat-insulating cover (4) being adapted to the mounting surface (2), the heat-insulating cover (4) comprising a cover plate (41) and a fixing surface (42); A water tank (5) is connected to one end of the delivery pipe (3), and a water pump (6) is provided on the delivery pipe (3); A temperature monitor (7) is arranged on the outside of the cover plate (41); Wherein, a first pipe hole (21) and a second pipe hole (22) are respectively provided on two opposite sides of the mounting surface (2); and the cover plate (41) is snap-fitted and connected to the mounting surface (2).

2. The waste heat recovery device for aluminum electrolysis cell according to claim 1 is characterized in that: The delivery pipe (3) is coiled in the cavity in a serpentine shape.

3. The waste heat recovery device for aluminum electrolysis cell according to claim 2 is characterized in that: The first pipeline hole (21) and the second pipeline hole (22) are arranged in a staggered manner, and the two end openings of the delivery pipe (3) pass through the first pipeline hole (21) and the second pipeline hole (22) respectively.

4. The waste heat recovery device for aluminum electrolysis cell according to claim 3 is characterized in that: Sealing rings are provided in both the first pipeline hole (21) and the second pipeline hole (22).

5. The waste heat recovery device for aluminum electrolysis cell according to claim 1, characterized in that: A groove (8) adapted to the end surface of the mounting surface (2) is provided around the inner side of the cover plate (41), and the end surface of the mounting surface (2) can be snapped into the groove (8).

6. The waste heat recovery device for aluminum electrolysis cell according to claim 5, characterized in that: A thermal insulation layer (9) is provided on the inner side of the cover plate (41), a thermal insulation layer (23) is provided on the inner side of the mounting surface (2), and a sealing layer is provided in the groove (8).

7. The waste heat recovery device for aluminum electrolysis cell according to claim 1, characterized in that: The outer wall (1) of the aluminum electrolytic cell is coated with a thermal conductive coating.

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