Side wall heat exchanger of aluminum electrolysis cell

Abstract

The invention belongs to the technical field of electrolytic aluminum, and discloses an aluminum electrolysis cell side wall heat exchanger which comprises a shell and an adjusting mechanism, the shell is connected with the side wall of an aluminum electrolysis cell, and a heat exchange cavity is formed in the shell; the adjusting mechanism comprises a shutter, a temperature sensing part and a driving assembly, the shutter, the temperature sensing part and the driving assembly are all arranged in the heat exchange cavity, the temperature sensing part is connected with the side wall of the aluminum electrolysis cell, and the driving assembly is in transmission connection with the shutter and the temperature sensing part so that the opening degree of the shutter can change along with the temperature change in the heat exchange cavity. Thus, when the temperature changes, the temperature sensing piece can transmit heat to the driving assembly, the driving assembly drives the shutter to rotate, the opening degree of the shutter is adjusted, then self-adaptive change of the heat exchange amount is achieved according to the temperature in the aluminum electrolysis cell, the temperature in the aluminum electrolysis cell is more uniform, and the flexibility and the heat exchange efficiency of the heat exchanger are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum electrolysis, and in particular to a side wall heat exchanger for an aluminum electrolysis cell. Background Art

[0002] Electrolytic aluminum is a process for producing aluminum through electrolysis. Aluminum oxide is used as the solute, carbonite is used as the anode, and aluminum liquid is used as the cathode. After a strong direct current is passed through, an electrochemical reaction, namely electrolysis, takes place at the two electrodes.

[0003] An aluminum reduction cell is a device used for the electrolytic aluminum process. It has simple equipment and a short construction period. The side wall temperature of the aluminum reduction cell is as high as 400°C. In order to avoid heat loss, a heat exchanger is usually installed on the side wall of the aluminum reduction cell.

[0004] However, the length of the aluminum reduction cell is long, and there are large differences in the side wall temperatures of different areas of the aluminum reduction cell. If the flow rate of the heat exchange medium in each area inside the heat exchanger is the same, it is difficult to adjust the heat exchange amount of each area to make the temperature of each area the same, which increases the unevenness of the thermal field, is not conducive to waste heat recovery and thermal balance regulation of the aluminum reduction cell. If the flow rate of the heat exchange medium is controlled by a valve, more sensors and control modules need to be set up, which is costly and complex, and there are problems of low flexibility of the heat exchanger and low heat exchange efficiency. Summary of the invention

[0005] The object of the present invention is to provide a side wall heat exchanger for an aluminum electrolysis cell to solve the problem of low flexibility and low heat exchange efficiency of the heat exchanger arranged on the side wall of the aluminum electrolysis cell.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A side wall heat exchanger for an aluminum electrolysis cell comprises: a shell, the shell is connected to the side wall of the aluminum electrolysis cell, and a heat exchange cavity is provided inside the shell; an adjustment mechanism, the adjustment mechanism comprises a shutter, a temperature sensing element and a drive assembly, the shutter, the temperature sensing element and the drive assembly are all arranged in the heat exchange cavity, the temperature sensing element is connected to the side wall of the aluminum electrolysis cell, and the drive assembly is transmission-connected to the shutter and the temperature sensing element so that the opening of the shutter changes with the temperature change in the heat exchange cavity.

[0008] Preferably, the adjustment mechanism also includes a temperature strain beam, one end of which is connected to the temperature sensing element, and the driving assembly includes a gear and a piston, the gear is transmission-connected to one end of the temperature strain beam away from the temperature sensing element, so that when the temperature inside the heat exchange chamber changes, the temperature strain beam twists and drives the gear to rotate, and the piston is transmission-connected to the gear and the shutter for adjusting the opening of the shutter.

[0009] Preferably, the driving assembly further comprises a linkage rod, one side of which is drivingly connected to the piston, and the other side of which is drivingly connected to a side of the shutter facing away from the side wall of the aluminum electrolysis cell.

[0010] Preferably, the temperature strain beam is a bimetallic spiral strain beam, and the torsion angle θ of the temperature strain beam satisfies Wherein, t1 is the temperature before the change, t2 is the temperature after the change, t2-t1 is the temperature change value, L is the length of the temperature strain beam, c is the thickness of the temperature strain beam, and k is a constant.

[0011] Preferably, the adjustment mechanism further includes an adjustment sleeve, and the temperature strain beam is arranged in the adjustment sleeve; and / or the drive assembly further includes a drive sleeve, and the piston is slidably connected to the drive sleeve.

[0012] Preferably, the aluminum electrolysis cell side wall heat exchanger further includes a guide vane arranged in the heat exchange cavity.

[0013] Preferably, a plurality of guide plates are provided, each of the guide plates is provided with a guide hole, and the guide holes on adjacent guide plates are staggered.

[0014] Preferably, the shutter is arranged on the side of the guide plate facing the air inlet end of the shell.

[0015] Preferably, the aluminum electrolysis cell side wall heat exchanger further comprises a heat transfer mechanism, which is disposed between the aluminum electrolysis cell side wall and the outer shell and is used for transferring heat from the aluminum electrolysis cell side wall to the heat exchange chamber.

[0016] Preferably, the heat transfer mechanism comprises a heat conductor, and two sides of the heat conductor are respectively in contact with the side wall of the shell facing the side wall of the aluminum electrolysis cell and the side wall of the aluminum electrolysis cell.

[0017] Beneficial effects of the present invention:

[0018] A side wall heat exchanger for an aluminum electrolytic cell comprises an outer shell and an adjusting mechanism, wherein the outer shell is connected to the side wall of the aluminum electrolytic cell, and a heat exchange chamber is provided inside the outer shell; the adjusting mechanism comprises a shutter, a temperature sensing element and a driving assembly, wherein the shutter, the temperature sensing element and the driving assembly are all arranged in the heat exchange chamber, the temperature sensing element is connected to the side wall of the aluminum electrolytic cell, and the driving assembly is transmission-connected to the shutter and the temperature sensing element, so that the opening of the shutter changes with the temperature change in the heat exchange chamber.

[0019] In this way, when the temperature of the side wall of the aluminum electrolysis cell changes or the temperature of different areas of the aluminum electrolysis cell is different, since the temperature can be transmitted to the drive component through the temperature sensor and drive the shutters to rotate, the opening of the shutters can be adjusted according to the temperature change, thereby realizing automatic adjustment of the heat exchange of the side wall heat exchanger of the aluminum electrolysis cell, so as to make the temperature in the aluminum electrolysis cell more uniform and improve the flexibility and heat exchange efficiency of the side wall heat exchanger of the aluminum electrolysis cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a side sectional view of a side wall heat exchanger of an aluminum electrolytic cell in one embodiment of the present invention;

[0021] Figure 2 1 is a front view of a side wall heat exchanger of an aluminum electrolytic cell according to an embodiment of the present invention;

[0022] Figure 3 is a top view of a drive assembly in one embodiment of the present invention;

[0023] Figure 4 It is a partial structural diagram of a side wall heat exchanger of an aluminum electrolytic cell in one embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the structure of a guide vane in one embodiment of the present invention.

[0025] In the figure:

[0026] 1. Side wall of aluminum electrolytic cell; 2. Shell; 21. Heat exchange chamber; 22. Air inlet pipe; 23. Air outlet pipe; 24. Spring stud; 3. Adjustment mechanism; 31. Shutter; 32. Temperature sensing element; 33. Drive assembly; 331. Gear; 3311. Eccentric pin; 332. Piston; 333. First connecting rod; 334. Second connecting rod; 335. Linkage rod; 336. Third connecting rod; 337. Drive sleeve; 34. Temperature strain beam; 35. Guide rod; 36. Adjustment sleeve; 4. Guide vane; 41. Guide hole; 5. Heat transfer mechanism; 51. Heat conducting element; 52. Baffle; 53. Filling element. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] See also Figure 1 The present invention provides a side wall heat exchanger for an aluminum electrolysis cell, comprising a shell 2 and an adjusting mechanism 3, wherein the shell 2 is connected to the side wall 1 of the aluminum electrolysis cell, and a heat exchange chamber 21 is provided inside the shell 2; the adjusting mechanism 3 comprises a shutter 31, a temperature sensing element 32 and a driving assembly 33, the shutter 31, the temperature sensing element 32 and the driving assembly 33 are all arranged in the heat exchange chamber 21, the temperature sensing element 32 is connected to the side wall 1 of the aluminum electrolysis cell, and the driving assembly 33 is transmission-connected to the shutter 31 and the temperature sensing element 32, so that the opening of the shutter 31 changes with the temperature change in the heat exchange chamber 21.

[0032] In this embodiment, the side wall 1 of the aluminum electrolysis cell is provided with a protrusion (not shown in the figure), the outer shell 2 is a vertical rectangular structure, an air inlet pipe 22 is provided at the bottom of the outer shell 2, and an air outlet pipe 23 is provided at the top. The air inlet pipe 22 and the air outlet pipe 23 are respectively connected to the heat exchange chamber 21, so that the heat exchange medium (the heat exchange medium in this embodiment is air) is input from the bottom of the heat exchange chamber 21 and output from the top of the heat exchange chamber 21.

[0033] Further, see Figure 1 and Figure 2 In this embodiment, the heat inside the aluminum electrolysis cell is transferred to the heat exchange chamber 21 through the side wall 1 of the aluminum electrolysis cell, and the shell 2 and the side wall 1 of the aluminum electrolysis cell are detachably connected through the spring stud 24; the shutter 31 is horizontally arranged, and the temperature sensing component 32 is fixedly arranged on the side of the shell 2 facing the side wall 1 of the aluminum electrolysis cell by pressure welding, one side of the temperature sensing component 32 is heat-exchanged with the side wall 1 of the aluminum electrolysis cell, and the other side is connected to the driving component 33, the shell 2 and the temperature sensing component 32 are both made of metal materials with high thermal conductivity, and the temperature sensing component 32 is a vertically arranged plate structure.

[0034] It should be noted that the air with lower temperature enters the heat exchange chamber 21 through the air inlet pipe 22, and at the same time, the heat inside the aluminum electrolytic cell is transferred to the heat exchange chamber 21 and exchanges heat with the air, so that the air carrying heat can be discharged to the outside through the air outlet pipe 23.

[0035] In this way, when the temperature of the side wall 1 of the aluminum electrolysis cell changes or multiple side wall heat exchangers of the aluminum electrolysis cell are arranged in areas with different temperatures, the temperature sensing element 32 can convert heat into force and transmit it to the driving component 33, so that the driving component 33 drives the shutter 31 to rotate, thereby adjusting the opening of the shutter 31, and then automatically adjusting the heat exchange amount of the side wall heat exchanger of the aluminum electrolysis cell according to the temperature change, so as to make the temperature inside the aluminum electrolysis cell more uniform, improve the flexibility and heat exchange efficiency of the side wall heat exchanger of the aluminum electrolysis cell, and save control costs.

[0036] It can be understood that the shell 2 can be made of stainless steel thin-walled materials, aluminum materials and other materials, the temperature sensing component 32 can be made of copper materials or stainless steel materials, and the materials of the shell 2 can be adjusted according to actual needs, which will not be listed in detail here; the side wall 1 of the aluminum electrolysis cell and the shell 2 can also be detachably connected by bolts, snaps and other structures, or fixedly connected by welding and other methods. In this embodiment, spring studs 24 are used for connection to facilitate the adjustment of the clamping torque so that the shell 2 can fit more closely to the side wall 1 of the aluminum electrolysis cell; the air inlet pipe 22 and the air outlet pipe 23 can be square tubes or circular tubes, which are not limited in this embodiment.

[0037] See also Figure 3 In some embodiments, the adjustment mechanism 3 also includes a temperature strain beam 34, one end of the temperature strain beam 34 is connected to the temperature sensing component 32, the driving assembly 33 includes a gear 331 and a piston 332, the gear 331 is transmission-connected to one end of the temperature strain beam 34 away from the temperature sensing component 32, so that when the temperature inside the heat exchange chamber 21 changes, the temperature strain beam 34 twists and drives the gear 331 to rotate, the piston 332 is transmission-connected to the gear 331 and the shutter 31, and is used to adjust the opening of the shutter 31.

[0038] Among them, see Figure 3 and Figure 4 The horizontally arranged temperature strain beam 34 can be twisted according to temperature changes. The adjustment mechanism 3 also includes a horizontally arranged guide rod 35, one end of the guide rod 35 is connected to the side of the temperature sensing component 32 away from the side wall 1 of the aluminum electrolysis cell, and the other end is fixedly connected to the temperature strain beam 34. The gear 331 is fixedly connected to the temperature strain beam 34, so that the gear 331 can rotate synchronously with the temperature strain beam 34. The driving assembly 33 also includes a first connecting rod 333 and a second connecting rod 334. The gear 331 is connected with an eccentric pin 3311. The first connecting rod 333 is connected to the gear 331 through the eccentric pin 3311 to achieve transmission connection. One end of the second connecting rod 334 is connected to the end of the first connecting rod 333 away from the gear 331 through a cylindrical pin (not shown in the figure), and the other end is rotatably connected to the piston 332, so that when the gear 331 rotates, the piston 332 is moved in the horizontal direction through the transmission of the first connecting rod 333 and the second connecting rod 334.

[0039] Furthermore, the longitudinal cross-sectional area of ​​the temperature sensing element 32 is not less than three times the longitudinal cross-sectional area of ​​the guide rod 35, and the longitudinal cross-sectional area of ​​the temperature sensing element 32 is not less than 10 cm 2 The guide rod 35 is fixedly connected to the temperature sensing element 32 by pressure welding to transfer heat.

[0040] In this way, by setting the temperature strain beam 34, the opening of the shutter 31 can be automatically changed according to the temperature change, which saves the installation of valves, sensors, control modules and other structures, so that the side wall heat exchangers of the aluminum electrolysis cell installed in different areas can flexibly realize heat exchange, improve the uniformity of the thermal field, and be beneficial to waste heat recovery and thermal balance regulation of the aluminum electrolysis cell, reduce control costs and structural complexity, and improve the flexibility and heat exchange efficiency of the side wall heat exchanger of the aluminum electrolysis cell.

[0041] It can be understood that the guide rod 35 is made of a metal material with high thermal conductivity, such as copper material, stainless steel material, etc. The material of the guide rod 35 can be adjusted according to actual needs, and it is sufficient to transfer heat to the temperature strain beam 34, which will not be elaborated here; the gear 331 can also be a structure such as a disc that can be eccentrically connected to the first connecting rod 333, and a plurality of gears 331 can be provided. The stroke torque can be changed by the mutual engagement of multiple gears 331, and a bevel gear set can also be provided to provide thrust for the shutter 31 to change the opening of the shutter 31.

[0042] See also Figure 3 In some embodiments, the driving assembly 33 further includes a linkage rod 335, one side of the linkage rod 335 is transmission-connected to the piston 332, and the other side of the linkage rod 335 is transmission-connected to the side of the shutter 31 away from the side wall 1 of the aluminum electrolysis cell.

[0043] In this embodiment, the driving assembly 33 also includes a third connecting rod 336, one end of the third connecting rod 336 is connected to the piston 332 through a cylindrical pin, and the other end is connected to the linkage rod 335. The linkage rod 335 and the blades of the shutter 31 are rotationally connected through a rotating shaft (not shown in the figure) so that the piston 332 drives the blades of the shutter 31 to rotate around their axis.

[0044] In this way, the linkage rod 335 can stably drive the shutter 31 to rotate, so that the aluminum electrolysis cell side wall heat exchanger installed in different temperature zones can automatically adjust the heat exchange capacity according to the temperature change. Through the transmission of the first connecting rod 333, the second connecting rod 334, and the third connecting rod 336, the displacement of the temperature strain beam 34 and the piston 332 can be reduced, thereby simplifying the overall structure, reducing the manufacturing cost, and improving the flexibility and reliability of the aluminum electrolysis cell side wall heat exchanger.

[0045] Furthermore, in some embodiments, the temperature strain beam 34 is a bimetallic strain beam, and the torsion angle θ of the temperature strain beam 34 satisfies Wherein, t1 is the temperature before the change, t2 is the temperature after the change, t2-t1 is the temperature change value, L is the length of the temperature strain beam 34, c is the thickness of the temperature strain beam 34, and k is a constant.

[0046] Taking the bimetallic strain beam composed of Invar alloy and stainless steel as an example, k = 2(α1-α2), where α1 is the thermal expansion coefficient of stainless steel, which is 18×10 -6 / ℃, α2 is the thermal expansion coefficient of Invar alloy, which is 2.0×10 -6 In order to improve the sensitivity to temperature, the bimetal strain beam in this embodiment adopts a spiral structure to increase the length L as much as possible in a limited space. Furthermore, a gear structure can also be adopted so that the temperature strain beam 34 drives the small gear to push the large gear to move, thereby enlarging the opening and closing angle of the shutter 31.

[0047] It should be noted that the bimetallic spiral strain beam includes two metal sheets (not shown in the figure) made of different materials, and the two metal sheets are spirally wound. When the temperature changes, torque is generated due to the different expansion coefficients and the temperature strain beam 34 is deflected. The end of the temperature strain beam 34 connected to the guide rod 35 is a fixed end, and the end connected to the gear 331 is a free end. When the free end generates a rotation angle, it can push the gear 331 to rotate and drive the eccentric pin 3311 to move, and then drive the piston 332 to move through the first connecting rod 333 and the second connecting rod 334. The piston 332 drives the third connecting rod 336 to drive the shutter 31 to adjust the opening of the shutter 31. When the temperature of the side wall 1 of the aluminum electrolysis cell increases, the opening of the shutter 31 increases, thereby increasing the air intake and heat exchange. When the temperature of the side wall 1 of the aluminum electrolysis cell decreases, the air intake and heat exchange are reduced by reducing the opening of the shutter 31.

[0048] It is understandable that the materials of the two metal sheets can be stainless steel and copper, or Invar and copper, and this embodiment does not limit this. Parameters such as the initial angle of the shutter 31 and the length of the temperature strain beam 34 can be adjusted according to the temperature change range of the side wall 1 of the aluminum electrolysis cell.

[0049] See also Figure 3 and Figure 4 In some embodiments, the adjustment mechanism 3 also includes an adjustment sleeve 36, and the temperature strain beam 34 is arranged in the adjustment sleeve 36 to limit the displacement of the free end of the temperature strain beam 34 so that it only undergoes angular deflection. The driving assembly 33 also includes a driving sleeve 337, and the piston 332 is slidably connected to the driving sleeve 337.

[0050] In this embodiment, the length direction of the adjusting sleeve 36 is parallel to the length direction of the temperature strain beam 34, the guide rod 35 is located inside the adjusting sleeve 36, the gear 331 is arranged at the end of the adjusting sleeve 36 away from the side wall 1 of the aluminum electrolysis cell, the length direction of the driving sleeve 337 is parallel to the moving direction of the piston 332, and the piston 332 is arranged inside the driving sleeve 337 to limit the movement of the piston 332.

[0051] In this way, the temperature strain beam 34 deflects in the adjusting sleeve 36, which can prevent the temperature strain beam 34 from generating displacement in other directions and affecting the rotation angle of the gear 331. The driving sleeve 337 can limit the moving direction of the piston 332, improve the stability of the opening and closing of the shutter 31, and enable the shutter 31 to flexibly adjust the angle when the temperature changes, thereby improving the uniformity of the thermal field inside the aluminum electrolysis cell and the heat exchange efficiency of the side wall heat exchanger of the aluminum electrolysis cell.

[0052] See also Figure 1 In some embodiments, the aluminum electrolysis cell side wall heat exchanger further includes a guide vane 4 disposed in the heat exchange cavity 21 .

[0053] In this embodiment, the guide vane 4 is vertically arranged so that the air entering through the air inlet pipe 22 can flow to the air outlet pipe 23 under the guidance of the guide vane 4 .

[0054] In this way, the guide plate 4 can guide the air flow so that the heat transferred from the side wall 1 of the aluminum electrolysis cell to the heat exchange chamber 21 can be fully exchanged with the air, thereby improving the heat exchange efficiency of the side wall heat exchanger of the aluminum electrolysis cell and improving the uniformity of the thermal field, so as to make the temperature of each area of ​​the aluminum electrolysis cell the same.

[0055] It is understandable that the location of the guide vane 4 can be adjusted according to the temperature of each area of ​​the aluminum electrolysis cell, and no further details are given here.

[0056] See also Figure 1 and Figure 5 In some embodiments, a plurality of guide plates 4 are provided, and each guide plate 4 is provided with a plurality of trapezoidal guide holes 41 at equal intervals along the length direction of the guide plate 4. The guide holes 41 on adjacent guide plates 4 are staggered, that is, in the direction perpendicular to the guide plates 4, the projections of adjacent guide plates 4 do not completely overlap.

[0057] Among them, flow channels for air to pass through are formed between adjacent guide plates 4, and the guide plates 4 are fixedly connected to the outer shell 2 by welding. The guide plates 4 are made of metal materials with high thermal conductivity. The two ends of the guide plates 4 are also connected to sealing plates made of high-temperature resistant materials (not shown in the figure) to achieve isolation of each flow channel. The distance between adjacent guide plates 4 is 3 cm.

[0058] In this way, the guide holes 41 on adjacent guide plates 4 are staggered to achieve uniform air flow. After the air enters the heat exchange chamber 21 from the air inlet pipe 22, the air intake is first adjusted by the shutter 31, and then the air is guided by the guide plate 4 to flow in a fixed direction, so that the side wall 1 of the aluminum electrolysis cell can fully exchange heat with the air at different temperatures, and the temperature of different areas in the aluminum electrolysis cell is made the same by adjusting the air intake, thereby improving the flexibility and heat exchange efficiency of the side wall heat exchanger of the aluminum electrolysis cell. In addition, there is no need to add valves, control modules and other structures during the adjustment process, so as to achieve temperature-adaptive adjustment of the ventilation volume and heat exchange amount of the side wall heat exchanger of the aluminum electrolysis cell, with lower control cost and higher reliability.

[0059] It is understandable that the guide vane 4 can also be detachably arranged inside the shell 2 by means of structures such as bolts. In the present embodiment, the guide vane 4 is fixedly connected to the shell 2 in order to improve the connection strength between the guide vane 4 and the shell 2 so as to guide the flow direction of the air.

[0060] See also Figure 1In some embodiments, the shutter 31 is disposed on the side of the guide vane 4 facing the air inlet end of the housing 2 (that is, the side of the housing 2 where the air inlet pipe 22 is disposed). In this embodiment, the shutter 31 is disposed at the bottom of the heat exchange cavity 21 and above the temperature strain beam 34.

[0061] In this way, the shutter 31 is arranged downstream of the air inlet pipe 22, which can adjust the amount of air entering the flow channel, and then automatically adjust the heat exchange of the side wall heat exchanger of the aluminum electrolysis cell according to the temperature change, saving control costs, simplifying the overall structure, and improving the heat exchange efficiency of the side wall heat exchanger of the aluminum electrolysis cell.

[0062] It is understandable that the shutter 31 can also be set below the temperature strain beam 34. In this embodiment, the shutter 31 is set above the temperature strain beam 34 to make the drive component 33 closer to the bottom of the heat exchange chamber 21 to prevent the drive component 33 from being affected by high temperature and malfunctioning.

[0063] See also Figure 1 In some embodiments, the aluminum electrolysis cell side wall heat exchanger further includes a heat transfer mechanism 5, which is disposed between the aluminum electrolysis cell side wall 1 and the shell 2, and is used to transfer the heat of the aluminum electrolysis cell side wall 1 to the heat exchange chamber 21. Further, in some embodiments, the heat transfer mechanism 5 includes a heat conductive member 51, and both sides of the heat conductive member 51 are respectively in contact with the side wall of the shell 2 facing the aluminum electrolysis cell side wall 1 and the aluminum electrolysis cell side wall 1.

[0064] In this embodiment, the heat transfer mechanism 5 also includes a baffle 52 and a filling member 53. The heat conductive member 51 is a heat conductive powder, and the filling member 53 is a plate-like structure made of high-temperature resistant material. Two filling members 53 are provided, and the two filling members 53 are respectively located at both ends of the heat conductive member 51. One side of the filling member 53 abuts against the side wall 1 of the aluminum electrolysis cell, and the other side overlaps with the outer shell 2. Two baffles 52 are correspondingly provided, and the two baffles 52 are arranged on the side away from the two filling members 53, and the baffles 52 are welded to the outer shell 2, that is, the baffle 52, the side wall 1 of the aluminum electrolysis cell, and the outer shell 2 enclose a space for accommodating the heat conductive member 51 and the filling member 53.

[0065] In this way, the heat of the side wall 1 of the aluminum electrolysis cell can be quickly transferred to the heat exchange chamber 21 through the heat conductor 51 and the outer shell 2, and because the shape of the thermally conductive powder can be changed, the thermally conductive powder can achieve a good fit with the outer shell 2 and the side wall 1 of the aluminum electrolysis cell, and improve the thermal conductivity, thereby improving the flexibility and heat exchange efficiency of the side wall heat exchanger of the aluminum electrolysis cell; the filling member 53 and the baffle 52 can prevent the thermally conductive powder from leaking.

[0066] It is understandable that the materials of the thermally conductive powder and the filler 53 can be adjusted according to actual needs. In this embodiment, the thermally conductive powder is made of alumina powder, and the filler 53 is made of silicate material or heat-resistant silica gel material.

[0067] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A side wall heat exchanger for an aluminum electrolysis cell, characterized in that: include: A shell (2), the shell (2) being connected to the side wall (1) of the aluminum electrolysis cell, and a heat exchange chamber (21) being provided inside the shell (2); The regulating mechanism (3) comprises a shutter (31), a temperature sensing element (32) and a driving assembly (33); the shutter (31), the temperature sensing element (32) and the driving assembly (33) are all arranged in the heat exchange chamber (21); the temperature sensing element (32) is connected to the side wall (1) of the aluminum electrolysis cell; the driving assembly (33) is transmission-connected to the shutter (31) and the temperature sensing element (32), so that the opening of the shutter (31) changes with the temperature change in the heat exchange chamber (21).

2. The aluminum electrolysis cell side wall heat exchanger according to claim 1, characterized in that: The regulating mechanism (3) further comprises a temperature strain beam (34), one end of which is connected to the temperature sensing element (32); the driving assembly (33) comprises a gear (331) and a piston (332); the gear (331) is transmission-connected to one end of the temperature strain beam (34) which is away from the temperature sensing element (32), so that when the temperature inside the heat exchange cavity (21) changes, the temperature strain beam (34) is twisted and drives the gear (331) to rotate; the piston (332) is transmission-connected to the gear (331) and the shutter (31), so as to adjust the opening degree of the shutter (31).

3. The aluminum electrolysis cell side wall heat exchanger according to claim 2, characterized in that: The driving assembly (33) further comprises a linkage rod (335), one side of which is drivingly connected to the piston (332), and the other side of which is drivingly connected to a side of the shutter (31) facing away from the side wall (1) of the aluminum electrolysis cell.

4. The aluminum electrolysis cell side wall heat exchanger according to claim 2, characterized in that: The temperature strain beam (34) is a bimetallic spiral strain beam, and the torsion angle θ of the temperature strain beam (34) satisfies Wherein, t1 is the temperature before the change, t2 is the temperature after the change, t2-t1 is the temperature change value, L is the length of the temperature strain beam (34), c is the thickness of the temperature strain beam (34), and k is a constant.

5. The aluminum electrolysis cell side wall heat exchanger according to claim 2, characterized in that: The adjustment mechanism (3) further comprises an adjustment sleeve (36), wherein the temperature strain beam (34) is disposed in the adjustment sleeve (36); and / or the drive assembly (33) further comprises a drive sleeve (337), wherein the piston (332) is slidably connected to the drive sleeve (337).

6. The aluminum electrolysis cell side wall heat exchanger according to any one of claims 1 to 5, characterized in that: The aluminum electrolysis cell side wall heat exchanger also includes a guide plate (4) arranged in the heat exchange cavity (21).

7. The aluminum electrolysis cell side wall heat exchanger according to claim 6, characterized in that: A plurality of guide plates (4) are provided, each of the guide plates (4) is provided with a guide hole (41), and the guide holes (41) on adjacent guide plates (4) are staggered.

8. The aluminum electrolysis cell side wall heat exchanger according to claim 6, characterized in that: The shutter (31) is arranged on the air inlet end side of the guide plate (4) facing the housing (2).

9. The aluminum electrolysis cell side wall heat exchanger according to any one of claims 1 to 5, characterized in that: The aluminum electrolysis cell side wall heat exchanger further comprises a heat transfer mechanism (5), wherein the heat transfer mechanism (5) is arranged between the aluminum electrolysis cell side wall (1) and the outer shell (2), and is used for transferring the heat of the aluminum electrolysis cell side wall (1) to the heat exchange chamber (21).

10. The aluminum electrolysis cell side wall heat exchanger according to claim 9, characterized in that: The heat transfer mechanism (5) comprises a heat conducting member (51), and two sides of the heat conducting member (51) are respectively in contact with the side wall of the housing (2) facing the side wall (1) of the aluminum electrolysis cell and the side wall (1) of the aluminum electrolysis cell.

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