Dust remover cooling device for secondary aluminum alloy production

Abstract

The utility model discloses a dust remover cooling device for secondary aluminum alloy production, which belongs to the technical field of flue gas cooling and comprises an air cooling box, a plurality of shunt pipes are longitudinally arrayed in the air cooling box, conical cavities are detachably connected to the top surface and the bottom surface of the air cooling box, the conical cavity at the top is communicated with a flue gas inlet pipe, and the conical cavity at the bottom is communicated with a flue gas outlet pipe. The top end of the shunt pipe extends out of the top surface of the air cooling box and is communicated with the conical cavity communicated with the flue gas inlet pipe; the bottom end of the shunt pipe extends out of the bottom surface of the air cooling box and is communicated with the conical cavity communicated with the flue gas outlet pipe; an air inlet and an air outlet are respectively formed in two opposite side surfaces of the air cooling box; a fan is correspondingly and fixedly connected outside the air inlet; a spiral flow deflector is arranged in the flow dividing pipe and detachably connected with the flow dividing pipe. Through the innovative structural design, the high-temperature flue gas cooling device has remarkable advantages in the aspects of high-temperature flue gas cooling efficiency, equipment maintenance convenience and the like.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas cooling technology, and in particular relates to a dust collector cooling device for the production of recycled aluminum alloys. Background Technology

[0002] A cyclone dust collector consists of a cylinder, a cone, an inlet, and an outlet. Dust-laden gas enters the cyclone dust collector through the inlet and rotates inside. Dust particles separate from the airflow under centrifugal force, their velocity decreases, and they gradually accumulate on the inner wall of the dust collector. Finally, they are discharged from the bottom of the dust collector under gravity. Due to its simple structure and good dust removal efficiency, the cyclone dust collector is widely used for dust removal of gases.

[0003] However, using ordinary cyclone dust collectors presents several problems with high-temperature flue gas or other high-temperature gases emitted during heating or smelting processes in the aluminum alloy or recycled aluminum industry. Problem 1: Due to the excellent heat transfer of the inner wall of the cyclone dust collector, once the temperature of the high-temperature flue gas reaches a certain level, the inner wall material must be made of high-temperature resistant material or an insulation layer must be added, which increases costs. Problem 2: High-temperature flue gas often carries molten or semi-molten metal droplets (vapor). For example, aluminum melting furnaces widely used in the die-casting industry emit flue gas containing a large number of molten or semi-molten aluminum droplets (vapor) during the aluminum melting process. Because these droplets or "vapor" are extremely small, they are difficult to remove by ordinary cyclone separators after mixing with the high-temperature gas. Existing technologies employ cooling devices to first cool the high-temperature flue gas before dust removal. However, after the flue gas is cooled, the tiny metal droplets (vapor) in the flue gas gradually condense and adhere to the cooling device due to the temperature decrease, seriously affecting the efficiency of the cooling device and the safe operation of the equipment. Therefore, solving the dust removal problem of this part of the high-temperature gas has become very urgent.

[0004] Therefore, a dust collector cooling device for the production of recycled aluminum alloys is proposed. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes a dust collector cooling device for the production of recycled aluminum alloys.

[0006] To achieve the above objectives, this utility model provides a dust collector cooling device for recycled aluminum alloy production, comprising: an air-cooled box, wherein a plurality of diversion pipes are arranged longitudinally inside the air-cooled box; a conical cavity is detachably connected to the top and bottom surfaces of the air-cooled box; the top conical cavity is connected to a flue gas inlet pipe, and the bottom conical cavity is connected to a flue gas outlet pipe; the top end of the diversion pipe extends out of the top surface of the air-cooled box and communicates with the conical cavity connected to the flue gas inlet pipe, and the bottom end of the diversion pipe extends out of the bottom surface of the air-cooled box and communicates with the conical cavity connected to the flue gas outlet pipe; an air inlet and an air outlet are respectively opened on opposite sides of the air-cooled box, and a fan is fixedly connected to the outside of the air inlet; a spiral guide vane is provided inside the diversion pipe, and the spiral guide vane is detachably connected to the diversion pipe.

[0007] Preferably, a plurality of fins are arranged parallel to the direction of the fan outlet inside the air-cooled box, and the diversion pipe passes through the plurality of fins and is arranged perpendicular to the fins.

[0008] Preferably, the spiral guide vane is fixedly connected to a central shaft, and an upper connecting cover is fixedly connected to the top surface of the central shaft. The upper connecting cover is fastened to the top of the diverter pipe. The end face of the upper connecting cover has a plurality of airflow holes, and the inner side wall of the upper connecting cover is connected to the outer side wall of the top of the diverter pipe by a thread.

[0009] Preferably, after the upper connecting cover is fastened to the diversion pipe, the spiral guide vane abuts against the inner wall of the diversion pipe, and the bottom surface of the upper connecting cover abuts against the top surface of the air-cooled box.

[0010] Preferably, the bottom end of the diverter pipe is threaded with a lower connecting cover, and a collar is fixedly connected to the center of the inner side of the lower connecting cover. The end face of the lower connecting cover, like the upper connecting cover, has several airflow holes. After the lower connecting cover is fastened to the diverter pipe, the collar is sleeved on the bottom end of the central shaft, and the top surface of the lower connecting cover abuts against the bottom surface of the air-cooled box.

[0011] Preferably, a dustproof net is detachably connected to the air outlet.

[0012] Preferably, a plurality of the diverter tubes are arranged in a staggered array along the blowing direction of the fan.

[0013] Preferably, the fins have corrugated undulations along the air outlet direction of the fan.

[0014] Compared with the prior art, the present invention has the following advantages and technical effects:

[0015] The dust collector cooling device for recycled aluminum alloy production exhibits significant advantages in high-temperature flue gas cooling efficiency and equipment maintenance convenience through innovative structural design: The longitudinally arrayed distribution pipes, combined with top and bottom conical cavities, evenly guide high-temperature flue gas into each pipe. The conical cavities reduce airflow resistance and ensure smooth flue gas flow. Spiral guide vanes within the distribution pipes induce spiral flow, extending residence time and enhancing turbulence, effectively disrupting the heat exchange boundary layer and significantly improving heat exchange efficiency. This lowers the flue gas temperature, reducing reliance on high-temperature resistant materials or insulation layers on the dust collector's inner wall and reducing manufacturing costs. Cost-effective; the spiral guide vanes and the diverter pipe are detachably connected, and the conical cavity and the air-cooled box are also detachable, which facilitates quick disassembly and cleaning of contaminants such as molten or semi-molten metal droplets condensed by flue gas cooling on the inner wall of the diverter pipe and the guide vanes. This solves the problem of reduced cooling efficiency and equipment safety hazards caused by condensate accumulation in existing technologies. In addition, the fan-driven air-cooling method eliminates the need for a complex water circulation system, avoiding problems such as scale and corrosion. The structure is simple, energy consumption is low, and environmental adaptability is strong. It is especially suitable for high-temperature industrial scenarios with special contaminants, such as die casting and smelting, and achieves an organic combination of efficient cooling, convenient maintenance and reliable operation. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0017] Figure 1 This is a schematic diagram of the cooling device for a dust collector used in the production of recycled aluminum alloys according to this utility model.

[0018] Figure 2 This is a schematic diagram of the diversion tube and fin structure in this utility model;

[0019] Figure 3 This is a schematic diagram of the installation structure of the shunt pipe in the air-cooled box according to this utility model;

[0020] Figure 4 This is an exploded view of the diversion pipe, upper connecting cover, and lower connecting cover in this utility model.

[0021] In the diagram: 1. Air-cooled box; 2. Diverter pipe; 3. Conical cavity; 4. Flue gas inlet pipe; 5. Flue gas outlet pipe; 6. Air inlet; 7. Air outlet; 8. Fan; 9. Spiral guide vane; 10. Fin; 11. Central shaft; 12. Upper connecting cover; 13. Airflow hole; 14. Lower connecting cover; 15. Collar; 16. Dustproof net. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Reference Figures 1 to 4 As shown, this embodiment provides a dust collector cooling device for recycled aluminum alloy production, including: an air-cooled box 1, with a plurality of diversion pipes 2 arranged longitudinally inside the air-cooled box 1, and conical cavities 3 detachably connected to the top and bottom surfaces of the air-cooled box 1. The top conical cavity 3 is connected to a flue gas inlet pipe 4, and the bottom conical cavity 3 is connected to a flue gas outlet pipe 5. The top end of the diversion pipe 2 extends out of the top surface of the air-cooled box 1 and connects to the conical cavity 3 connected to the flue gas inlet pipe 4, and the bottom end of the diversion pipe 2 extends out of the bottom surface of the air-cooled box 1 and connects to the conical cavity 3 connected to the flue gas outlet pipe 5. An air inlet 6 and an air outlet 7 are respectively opened on opposite sides of the air-cooled box 1, and a fan 8 is fixedly connected to the outside of the air inlet 6. A spiral guide vane 9 is provided inside the diversion pipe 2, and the spiral guide vane 9 is detachably connected to the diversion pipe 2.

[0025] The dust collector cooling device for recycled aluminum alloy production exhibits significant advantages in high-temperature flue gas cooling efficiency and equipment maintenance convenience through innovative structural design: The longitudinally arrayed diversion pipes 2, combined with the top and bottom conical cavities 3, evenly guide high-temperature flue gas into each diversion pipe 2. The guiding effect of the conical cavities 3 reduces airflow resistance and ensures stable flue gas flow. The spiral guide vanes 9 inside the diversion pipes 2 promote spiral flow of the flue gas, extending residence time and enhancing turbulence, effectively disrupting the heat exchange boundary layer, significantly improving heat exchange efficiency, and lowering the flue gas temperature. This reduces reliance on high-temperature resistant materials or insulation layers on the inner wall of the dust collector, reducing the need for heat exchange. The spiral guide vane 9 is detachably connected to the diversion pipe 2, and together with the detachable structure of the conical cavity 3 and the air-cooled box 1, it facilitates quick disassembly and cleaning of contaminants such as molten or semi-molten metal droplets condensed by flue gas cooling on the inner wall of the diversion pipe 2 and the guide vane. This solves the problem of reduced cooling efficiency and equipment safety hazards caused by condensate accumulation in the prior art. In addition, the air-cooling method driven by the fan 8 eliminates the need for a complex water circulation system, avoiding problems such as scale and corrosion. The structure is simple, energy consumption is low, and environmental adaptability is strong. It is especially suitable for high-temperature industrial scenarios with special contaminants such as die casting and smelting, achieving an organic combination of efficient cooling, convenient maintenance and reliable operation.

[0026] The scheme is further optimized. Several fins 10 are arranged parallel to the air outlet direction of the fan 8 inside the air-cooled box 1. The diversion pipe 2 passes through several fins 10 and is arranged perpendicular to the fins 10.

[0027] By arranging fins 10 parallel to the air outlet direction of the fan 8 and penetrating the diversion pipe 2 within the air-cooled box 1, a staggered "pipe-fin" heat dissipation structure is formed, which has the advantages of significantly improving heat exchange efficiency, optimizing flow field distribution, and enhancing structural stability. The fins 10, as an extended heat dissipation surface, greatly increase the contact area between the diversion pipe 2 and the external cooling air, enhance lateral air convection heat transfer, and allow the heat from the high-temperature flue gas to be quickly dissipated through the outer wall of the diversion pipe 2 via the fins 10. Combined with the air flow driven by the fan 8, a uniform air flow field distribution is achieved, avoiding local cooling blind spots in the diversion pipe 2 and improving the consistency of flue gas cooling. At the same time, the fins 10 provide rigid support for the diversion pipe 2, reducing the risk of vibration deformation of the long-diameter diversion pipe 2, enhancing the overall structural strength of the device, and the modular design facilitates prefabrication and assembly, reducing processing costs. This structure, together with the spiral guide vanes 9 inside the diversion pipe 2, forms a bidirectional heat exchange mechanism of "enhanced flue gas disturbance inside the pipe + extended air heat dissipation outside the pipe," which synergistically improves cooling efficiency, rapidly reduces flue gas temperature, and further solves the efficiency problem in high-temperature flue gas treatment, making it suitable for high-load industrial scenarios.

[0028] The scheme is further optimized. A central shaft 11 is fixedly connected to the axis of the spiral guide vane 9. An upper connecting cover 12 is fixedly connected to the top surface of the central shaft 11. The upper connecting cover 12 is fastened to the top of the diverter pipe 2. Several airflow holes 13 are opened on the end face of the upper connecting cover 12. The inner side wall of the upper connecting cover 12 is connected to the outer side wall of the top of the diverter pipe 2 by threads.

[0029] By setting a central shaft 11 at the center of the spiral guide vane 9 and threading it to the upper connecting cover 12, a detachable and stable installation structure is formed: the central shaft 11 fixes the spiral guide vane 9 and is fastened to the top of the diversion pipe 2 by the upper connecting cover 12. The airflow hole 13 on the end face of the upper connecting cover 12 ensures the flow of flue gas. The inner wall is threaded to the top of the diversion pipe 2 to achieve quick disassembly and assembly. At the same time, the bottom surface of the upper connecting cover 12 abuts against the top surface of the air-cooled box 1 to form a positioning support. This design not only ensures the stable installation of the spiral guide vane 9 in the diversion pipe 2, avoiding shaking or displacement caused by high-speed flue gas flow, and ensuring that it continues to play its role in inducing spiral flow and enhancing heat exchange, but also allows the guide vane and central shaft 11 to be quickly removed as a whole through convenient threaded disassembly, thoroughly cleaning the inner wall of the diversion pipe 2 and the surface of the guide vane of molten metal droplets and other contaminants condensed by flue gas cooling. This solves the problem of difficult maintenance of traditional fixed guide structures. The design of the airflow hole 13 does not affect the flue gas guiding efficiency, realizing an organic combination of enhanced guiding and convenient maintenance, and ensuring the long-term stable operation of the device.

[0030] The scheme is further optimized so that after the upper connecting cover 12 is fastened to the diversion pipe 2, the spiral guide vane 9 abuts against the inner wall of the diversion pipe 2, and the bottom surface of the upper connecting cover 12 abuts against the top surface of the air-cooled box 1.

[0031] By limiting the upper connecting cover 12 to be fastened to the diversion pipe 2, the spiral guide vane 9 abuts against the inner wall of the diversion pipe 2, and the bottom surface of the upper connecting cover 12 abuts against the top surface of the air-cooled box 1, a dual positioning and sealing mechanism is formed: the outer edge of the spiral guide vane 9 is tightly fitted to the inner wall of the diversion pipe 2, ensuring its stability in high-speed flue gas flow, avoiding the impact of vibration or displacement on the spiral guiding effect, ensuring the uniformity and continuity of the flue gas spiral flow, thereby stabilizing and strengthening the heat exchange inside the pipe; the bottom surface of the upper connecting cover 12 abuts against the top surface of the air-cooled box 1, not only realizing the precise positioning of the guiding component and avoiding axial movement, but also reducing the risk of flue gas leakage between the top of the diversion pipe 2 and the air-cooled box 1 through surface contact sealing, ensuring that all high-temperature flue gas is guided by the spiral guide vane 9. With the threaded connection detachable design, it is convenient to maintain while taking into account the structural stability and sealing performance, effectively solving the problem of efficiency reduction and leakage caused by loose guide vanes, and improving the reliability of the device.

[0032] Furthermore, a sealing gasket is fixed to the bottom surface of the upper connecting cover 12.

[0033] The scheme is further optimized. The bottom end of the diversion pipe 2 is threaded with a lower connecting cover 14. A collar 15 is fixed to the center of the inner side of the lower connecting cover 14. The end face of the lower connecting cover 14 is provided with several airflow holes 13, just like the upper connecting cover 12. After the lower connecting cover 14 is fastened to the diversion pipe 2, the collar 15 is sleeved on the bottom end of the central shaft 11, and the top surface of the lower connecting cover 14 abuts against the bottom surface of the air-cooled box 1.

[0034] By setting a lower connecting cover 14 with a collar 15 at the bottom end of the diversion pipe 2 and engaging it with the bottom end of the central shaft 11, a lower support and positioning structure for the spiral guide assembly is formed. The lower connecting cover 14 is detachably connected to the bottom end of the diversion pipe 2 via threads. The inner collar 15 is fitted onto the bottom end of the central shaft 11. The airflow hole 13 on the end face ensures smooth flow of flue gas. After fastening, the top surface of the lower connecting cover 14 abuts against the bottom surface of the air-cooled box 1, forming a bidirectional fixation of the central shaft 11 with the upper connecting cover 12 at the top. This design not only ensures that the spiral guide vane 9 maintains coaxiality and stability within the diversion pipe 2, but also avoids the problems caused by high-speed flue gas flow. Axial movement or radial offset ensures continuous and efficient guidance of flue gas spiral flow. It also cooperates with the upper connecting cover 12 to achieve quick disassembly of the entire flow guide assembly through threaded connection, which facilitates thorough cleaning of molten metal droplets and other condensates on the inner wall of the diversion pipe 2 and the surface of the spiral guide vane 9. The cooperation between the collar 15 and the central shaft 11 enhances the vibration resistance of the flow guide structure. The design of abutting against the bottom surface of the air-cooled box 1 also plays a sealing role, preventing flue gas from leaking from the connection between the bottom end of the diversion pipe 2 and the air-cooled box 1, ensuring the integrity of the cooling process, and achieving a unity of structural stability, convenient maintenance and reliable sealing.

[0035] The design has been further optimized, with a dustproof mesh 16 detachably connected to the air outlet 7.

[0036] By installing a removable dust filter 16 at the air outlet 7, a pre-filter barrier for external dust of the cooling device is formed: the dust filter 16 can effectively intercept dust, particles and other impurities, preventing them from entering the air-cooled box 1 and adhering to the heat dissipation surfaces such as the distribution pipe 2 and fins 10, and preventing the formation of a heat insulation layer due to dust accumulation, which would reduce heat exchange efficiency; at the same time, it forms an isolation and protection for the inside of the air-cooled box 1, preventing personnel from contacting the inside of the air-cooled box 1 and causing burns; the detachable connection design makes it easy to regularly and quickly disassemble and clean the inside of the air-cooled box 1 or replace the dust filter 16, ensuring continuous and smooth circulation of cooling air.

[0037] To further optimize the scheme, several diversion pipes 2 are arranged in a staggered array along the blowing direction of the fan 8.

[0038] The staggered array structure of the manifolds 2 along the blowing direction of the fan 8 breaks the limitations of flow field uniformity in traditional straight-line arrangements, exhibiting significant advantages in heat exchange efficiency, flow field disturbance, and space utilization. The staggered arrangement causes the cooling air to flow through the manifolds 2 in an alternating flow pattern, forcibly changing the airflow direction and generating vortices, significantly enhancing the turbulence on the air side, and disrupting the thermal boundary layer on the outer wall of the manifolds 2, thereby increasing the heat exchange efficiency between the air and the pipe wall by 20%-30%. At the same time, the irregular flow channels formed by the staggered arrangement avoid the "airflow short-circuiting" that may occur in the in-line structure—that is, air passing through quickly in a straight line without sufficient heat exchange, promoting uniform air coverage of all surfaces of the manifolds 2. This design eliminates cooling blind spots and ensures the efficiency and effectiveness of flue gas cooling in the diversion pipe 2. Furthermore, the staggered array allows for a more compact layout of the diversion pipe 2 within the same volume of the air-cooled box 1, reducing the equipment volume with the same heat exchange area, or increasing the number of diversion pipes 2 within the same volume to expand the heat exchange area. This design, combined with the internal disturbance of the spiral guide vanes 9, creates a two-way synergistic effect of "enhanced external air turbulence + spiral flow of flue gas inside the pipe," further accelerating the cooling of high-temperature flue gas and reducing the residence time and adhesion opportunities of molten metal droplets on the pipe wall. It is particularly suitable for industrial scenarios with high dust and high-viscosity pollutants, improving cooling efficiency while ensuring the long-term stability of the device.

[0039] The design has been further optimized, with fins 10 featuring corrugated undulations along the air outlet direction of the fan 8.

[0040] By incorporating corrugated undulations along the air outlet direction of the fan 8 on the fins 10, an optimized design is achieved to enhance heat exchange and flow field disturbance. The corrugated undulations on the surface of the fins 10 significantly increase the heat dissipation area on the air side, by 15%-20% compared to straight fins 10. Simultaneously, this forces the cooling air to undergo periodic changes in flow direction, inducing turbulence and disrupting the thermal boundary layer on the surface of the fins 10. This significantly improves the convective heat transfer coefficient between the air and the fins 10 and the outer wall of the distribution pipe 2. The corrugated structure also effectively disperses the airflow, preventing a decrease in heat exchange efficiency caused by "laminar adhesion" that may occur with straight fins 10, ensuring that the air flows uniformly and strongly within the gaps of the fins 10. The surface of tube 2 further reduces the cooling difference between each branch tube 2; in addition, the mechanical strength of the corrugated undulation is higher than that of the straight fin 10, which can reduce the deformation or vibration of the fin 10 caused by long-term scouring of high-speed airflow and improve structural stability; this design, together with the spiral guide vane 9 and the parallel fin 10, forms a synergistic effect, and without significantly increasing the energy consumption of the fan 8, it achieves a breakthrough improvement in air-side heat exchange efficiency through the triple mechanism of "expanded area + turbulence enhancement + structural enhancement". It can not only accelerate the cooling of flue gas to suppress the condensation of molten metal droplets, but also reduce the accumulation of dust on the surface of the fin 10 through turbulence scouring, extend the equipment cleaning cycle, and ensure the long-term efficient operation of the cooling device.

[0041] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0042] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A dust collector cooling device for the production of recycled aluminum alloys, characterized in that, include: An air-cooled box (1) has several longitudinally arranged diverter pipes (2) inside. The top and bottom surfaces of the air-cooled box (1) are detachably connected to conical cavities (3). The top conical cavity (3) is connected to a flue gas inlet pipe (4), and the bottom conical cavity (3) is connected to a flue gas outlet pipe (5). The top of the diverter pipe (2) extends out of the top surface of the air-cooled box (1) and connects to the conical cavity (3) connected to the flue gas inlet pipe (4). The bottom end of the diversion pipe (2) extends out of the bottom surface of the air-cooled box (1) and communicates with the conical cavity (3) that is connected to the flue gas outlet pipe (5); the air-cooled box (1) has an air inlet (6) and an air outlet (7) on opposite sides, and a fan (8) is fixedly connected to the outside of the air inlet (6); a spiral guide vane (9) is provided inside the diversion pipe (2), and the spiral guide vane (9) is detachably connected to the diversion pipe (2).

2. The dust collector cooling device for recycled aluminum alloy production according to claim 1, characterized in that: The air-cooled box (1) has several fins (10) arranged parallel to the air outlet direction of the fan (8), and the diversion pipe (2) passes through several of the fins (10) and is arranged perpendicular to the fins (10).

3. The dust collector cooling device for recycled aluminum alloy production according to claim 1, characterized in that: The spiral guide vane (9) is fixedly connected to a central shaft (11), and an upper connecting cover (12) is fixedly connected to the top surface of the central shaft (11). The upper connecting cover (12) is fastened to the top of the diverter pipe (2). The end face of the upper connecting cover (12) is provided with a plurality of airflow holes (13), and the inner side wall of the upper connecting cover (12) is connected to the outer side wall of the top of the diverter pipe (2) by a thread.

4. The dust collector cooling device for recycled aluminum alloy production according to claim 3, characterized in that: After the upper connecting cover (12) is fastened to the diversion pipe (2), the spiral guide vane (9) abuts against the inner wall of the diversion pipe (2), and the bottom surface of the upper connecting cover (12) abuts against the top surface of the air-cooled box (1).

5. The dust collector cooling device for recycled aluminum alloy production according to claim 3, characterized in that: The bottom end of the diversion pipe (2) is threaded with a lower connecting cover (14). A collar (15) is fixedly connected to the center of the inner side of the lower connecting cover (14). The end face of the lower connecting cover (14) is provided with several airflow holes (13), just like the upper connecting cover (12). After the lower connecting cover (14) is fastened to the diversion pipe (2), the collar (15) is sleeved on the bottom end of the central shaft (11), and the top surface of the lower connecting cover (14) abuts against the bottom surface of the air-cooled box (1).

6. The dust collector cooling device for recycled aluminum alloy production according to claim 1, characterized in that: A dustproof net (16) is detachably connected to the air outlet (7).

7. The dust collector cooling device for recycled aluminum alloy production according to claim 1, characterized in that: Several of the aforementioned diversion pipes (2) are arranged in a staggered array along the blowing direction of the fan (8).

8. The dust collector cooling device for recycled aluminum alloy production according to claim 2, characterized in that: The fins (10) are provided with corrugated undulations along the air outlet direction of the fan (8).

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