Flue gas treatment device for smelting furnace of aluminum alloy production line

Abstract

An aluminum alloy production line smelting furnace flue gas treatment device relates to the technical field of aluminum alloy production. The problems that when an existing smelting furnace flue gas treatment device for the aluminum alloy production line finally discharges flue gas through an exhaust pipe, the flue gas still has certain heat, and the surrounding environment can be affected by direct discharge are solved. A smoke inlet cover on an outer sleeve is aligned to one end of a smoke exhaust pipe, the outer sleeve is fixedly connected with the smoke exhaust pipe through a flange plate, high-temperature smoke is exhausted into the smoke inlet cover through the smoke exhaust pipe and enters a cooling pipeline to circulate, and a liquid inlet pipe and a liquid outlet pipe are sequentially arranged on the outer surface of a cooling unit in the length direction. The cooling liquid in the outer sleeve is supplemented through the liquid inlet pipe, and the cooling liquid in the outer sleeve is extracted through the liquid discharge pipe, so that the cooling liquid in the outer sleeve is kept at a low temperature all the time, the cooling efficiency is ensured, the cooling liquid in the outer sleeve cools high-heat flue gas in the cooling pipeline, and the cooling efficiency is improved. And the temperature of the high-temperature flue gas is reduced to normal temperature. The method is suitable for aluminum alloy production.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy production, and in particular to a fume treatment device for a furnace in an aluminum alloy production line. Background Art

[0002] In aluminum alloy production lines, the purpose of the melting furnace is to remove impurities and increase the purity of the aluminum. Commonly used furnaces include coreless and trough induction furnaces, crucible and reflective open-hearth furnaces, as well as resistance and electric radiation furnaces. The melting process produces a large amount of waste gas. If this waste gas is not purified and discharged to the outside world, it can cause unnecessary harm to the human body and the atmosphere.

[0003] Chinese utility model patent publication number CN207662222U discloses a flue gas treatment device for a furnace in an aluminum alloy production line. This device utilizes a fume removal tank located at the bottom of the furnace. The tank initially purifies the flue gas within the furnace by passing it through water, preventing polluting emissions. At high temperatures, the water undergoes a physical transformation, turning into gas, which in turn provides heat for the boiler. The flue gas then passes through a purification tank to further treat other harmful components. The purified flue gas is then released to the outside world without causing unnecessary harm to the human body or the atmosphere, thereby improving the environmental friendliness of aluminum alloy production. However, when the flue gas is finally discharged through the exhaust pipe, it still retains a certain amount of heat, and direct discharge would impact the surrounding environment. Summary of the Invention

[0004] The present invention proposes a flue gas treatment device for the furnace of an aluminum alloy production line to solve the problem that when the flue gas is finally discharged through the exhaust pipe, the flue gas still contains a certain amount of heat, and direct discharge will affect the surrounding environment.

[0005] The present invention relates to a fume treatment device for a furnace in an aluminum alloy production line, which comprises a furnace 1, a purification tank 2, a fume exhaust pipe 3, a cooling unit 4 and a circulation unit 5;

[0006] The flue gas output end of the furnace 1 is connected to the input end of the purification tank 2 through a pipe. The output end of the purification tank 2 is connected to one end of the exhaust pipe 3. The other end of the exhaust pipe 3 is connected to the input end of the cooling unit 4. The circulation unit 5 includes a liquid inlet pipe 51 and a liquid discharge pipe 52. The outer surface of the cooling unit 4 is provided with a liquid inlet pipe 51 and a liquid discharge pipe 52 in sequence along the length direction.

[0007] Furthermore, the cooling unit 4 includes an outer sleeve 41, a smoke inlet hood 42, a smoke exhaust hood 43, a cooling pipeline 44 and a flange 45;

[0008] A flange 45 is provided at one end of the outer sleeve 41. A smoke inlet hood 42 and a cooling pipe 44 are sequentially provided inside the one end of the outer sleeve 41. A smoke exhaust hood 43 is provided inside the other end of the outer sleeve 41. The smoke hood 42, the cooling pipe 44 and the smoke exhaust hood 43 are connected to each other.

[0009] Furthermore, the flange 45 at one end of the outer sleeve 41 is connected to the end of the exhaust pipe 3 by a fixing bolt 46;

[0010] Furthermore, the smoke inlet hood 42 and the smoke exhaust hood 43 are evenly arranged in a funnel shape;

[0011] Furthermore, the outer surface of the large diameter end of the smoke inlet cover 42 is welded and fixed to the inner wall of one end of the outer sleeve 41;

[0012] Furthermore, the outer surface of the large diameter end of the exhaust hood 43 is welded and fixed to the inner wall of the other end of the outer sleeve 41;

[0013] Furthermore, a filter 47 is embedded in the interior of the exhaust hood 43;

[0014] Furthermore, the cooling pipe 44 is provided as a spiral coil;

[0015] Furthermore, the inner diameter of the cooling pipe 44 is smaller than the inner diameter of the exhaust pipe 3;

[0016] Furthermore, when in use, the smoke inlet hood 42 on the outer sleeve 41 is aligned with one end of the smoke exhaust pipe 3, and the outer sleeve 41 is fixedly connected to the smoke exhaust pipe 3 through the flange 45. The high-temperature smoke is discharged into the smoke inlet hood 42 through the smoke exhaust pipe 3 and enters the cooling pipe 44 for circulation. In combination with the outer surface of the cooling unit 4, a liquid inlet pipe 51 and a liquid discharge pipe 52 are sequentially provided along the length direction. The coolant in the outer sleeve 41 is replenished through the liquid inlet pipe 51, and the coolant in the outer sleeve 41 is extracted through the liquid discharge pipe 52, so that the coolant in the outer sleeve 41 always maintains a low temperature, ensuring the cooling efficiency, so that the coolant in the outer sleeve 41 cools the high-temperature smoke in the cooling pipe 44, and then is discharged through the smoke exhaust hood 43, thereby reducing the impact on the environment and being more environmentally friendly; and the extracted heat-carrying coolant can be recycled, and the liquid inlet pipe 51 and the liquid discharge pipe 52 can be connected through a hot furnace or a condenser for heating or circulating coolant.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention overcomes the shortcomings of the prior art. The smoke inlet hood on the outer sleeve is aligned with one end of the smoke exhaust pipe, and the outer sleeve is fixedly connected to the smoke exhaust pipe through a flange. The high-temperature smoke is discharged into the smoke inlet hood through the smoke exhaust pipe and enters the cooling pipeline for circulation. In combination with the outer surface of the cooling unit, a liquid inlet pipe and a liquid discharge pipe are sequentially provided along the length direction. The coolant in the outer sleeve is replenished through the liquid inlet pipe, and the coolant in the outer sleeve is extracted through the liquid discharge pipe, so that the coolant in the outer sleeve always maintains a low temperature, ensuring cooling efficiency, so that the coolant in the outer sleeve cools the high-temperature smoke in the cooling pipeline, and is then discharged through the smoke exhaust hood, thereby achieving the temperature of the high-temperature smoke to be reduced to room temperature, avoiding impact on the surrounding environment, and being more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the left-side of the aluminum alloy production line furnace flue gas treatment device of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the right-side of the aluminum alloy production line furnace flue gas treatment device of the present invention;

[0021] Figure 3 It is a main cross-sectional view of a cooling unit in a flue gas treatment device for a furnace of an aluminum alloy production line according to the present invention. DETAILED DESCRIPTION

[0022] Specific implementation method 1: Combination Figure 1 and Figure 2 This embodiment describes a fume treatment device for a furnace in an aluminum alloy production line, which comprises a furnace 1, a purification tank 2, a fume exhaust pipe 3, a cooling unit 4, and a circulation unit 5;

[0023] The flue gas output end of the furnace 1 is connected to the input end of the purification tank 2 through a pipe. The output end of the purification tank 2 is connected to one end of the exhaust pipe 3. The other end of the exhaust pipe 3 is connected to the input end of the cooling unit 4. The circulation unit 5 includes a liquid inlet pipe 51 and a liquid discharge pipe 52. The outer surface of the cooling unit 4 is provided with a liquid inlet pipe 51 and a liquid discharge pipe 52 in sequence along the length direction.

[0024] The outer surface of the cooling unit 4 is provided with a liquid inlet pipe 51 and a liquid outlet pipe 52 in sequence along the length direction. The coolant in the outer sleeve 41 is replenished through the liquid inlet pipe 51, and the coolant in the outer sleeve 41 is extracted through the liquid outlet pipe 52, so that the coolant in the outer sleeve 41 always maintains a low temperature, ensuring the cooling efficiency, so that the coolant in the outer sleeve 41 cools the high-temperature flue gas in the cooling pipe 44, and then is discharged through the smoke hood 43, thereby reducing the impact on the environment and being more environmentally friendly. The extracted coolant carrying heat can be recycled, and the liquid inlet pipe 51 and the liquid outlet pipe 52 can be connected through a hot furnace or a condenser for heating or circulating the coolant.

[0025] Specific implementation method 2: Combination Figures 1 to 3 This embodiment is described. This embodiment further limits the flue gas treatment device described in the first embodiment. In this embodiment, a flue gas treatment device for a furnace in an aluminum alloy production line is described. The cooling unit 4 includes an outer sleeve 41, a fume hood 42, an exhaust hood 43, a cooling pipe 44, and a flange 45.

[0026] A flange 45 is provided at one end of the outer sleeve 41, a smoke inlet hood 42 and a cooling pipe 44 are sequentially provided inside the one end of the outer sleeve 41, and a smoke exhaust hood 43 is provided inside the other end of the outer sleeve 41, and the smoke hood 42, cooling pipe 44 and smoke exhaust hood 43 are connected to each other.

[0027] Specific implementation method three: Combination Figures 1 to 3 This embodiment is described as further limiting the flue gas treatment device described in the second embodiment. In this embodiment, a flue gas treatment device for a furnace in an aluminum alloy production line is provided. The flange 45 at one end of the outer sleeve 41 is connected to the end of the exhaust pipe 3 by a fixing bolt 46.

[0028] In this specific embodiment, the flange 45 at one end of the outer sleeve 41 is connected to the end of the smoke exhaust pipe 3 through the fixing bolts 46, and the connection is convenient and fast.

[0029] Specific implementation method four: Combination Figures 1 to 3 This embodiment is described. This embodiment further limits the flue gas treatment device described in the second embodiment. In the flue gas treatment device of the aluminum alloy production line furnace described in this embodiment, the fume inlet hood 42 and the fume exhaust hood 43 are evenly arranged in a funnel shape;

[0030] In this embodiment, the smoke inlet hood 42 and the smoke exhaust hood 43 are uniformly arranged in a funnel shape. The cross-sectional area of each hood 42 and the smoke exhaust hood 43 gradually decreases from the end near the end of the outer sleeve 41 to the end of the cooling pipe 44. During use, the funnel-shaped smoke inlet hood 42 and the smoke exhaust hood 43 help to guide the smoke from the large-diameter exhaust pipe 3 into the small-diameter cooling pipe 44 and then out through the large-diameter exhaust hood 43, thereby facilitating the flow of smoke.

[0031] Specific implementation method five: Combination Figures 1 to 3 This embodiment is described as a further limitation of the flue gas treatment device described in the fourth embodiment. In this embodiment, a flue gas treatment device for a furnace in an aluminum alloy production line is described, in which the outer surface of the large-diameter end of the smoke inlet hood 42 is welded and fixed to the inner wall of one end of the outer sleeve 41.

[0032] Specific implementation method six: combination Figures 1 to 3 This embodiment is described as a further limitation of the flue gas treatment device described in the fourth specific embodiment. In the flue gas treatment device for the furnace of an aluminum alloy production line described in this embodiment, the outer surface of the large-diameter end of the exhaust hood 43 is welded and fixed to the inner wall of the other end of the outer sleeve 41.

[0033] Specific implementation method seven: combination Figures 1 to 3 This embodiment is described as a further limitation of the flue gas treatment device described in the sixth embodiment. In this embodiment, a flue gas treatment device for a furnace in an aluminum alloy production line is provided, wherein a filter screen 47 is embedded in the exhaust hood 43.

[0034] In this specific embodiment, a filter 47 is embedded in the exhaust hood 43; when in use, the smoke is blocked and filtered by the filter 47 when it is discharged through the exhaust hood 43, thereby further ensuring the cleanliness of the smoke discharge and protecting the environment.

[0035] Specific implementation method eight: combination Figures 1 to 3 This embodiment is described as a further limitation of the flue gas treatment device described in the second embodiment. In this embodiment, a flue gas treatment device for a furnace in an aluminum alloy production line is described, and the cooling pipe 44 is a spiral coil arrangement.

[0036] Specific implementation method nine: Combination Figures 1 to 3 This embodiment is described as further limiting the flue gas treatment device described in the eighth embodiment. In the flue gas treatment device for a furnace in an aluminum alloy production line described in this embodiment, the inner diameter of the cooling pipe 44 is smaller than the inner diameter of the exhaust pipe 3.

[0037] In this specific embodiment, the cooling pipe 44 is arranged as a spiral coil, and the inner diameter of the cooling pipe 44 is smaller than the inner diameter of the smoke exhaust pipe 3. The cooling pipe 44 with a small-diameter spiral coil structure can lengthen the flow path of the smoke and slow down the flow speed of the smoke when circulating the smoke carrying heat, so that the smoke is in contact with the coolant for a longer time and the cooling effect is better.

[0038] How it works

[0039] When in use, align the smoke inlet hood 42 on the outer sleeve 41 with one end of the smoke exhaust pipe 3, and fix the outer sleeve 41 to the smoke exhaust pipe 3 through the flange 45. The high-temperature smoke is discharged into the smoke inlet hood 42 through the smoke exhaust pipe 3 and enters the cooling pipe 44 for circulation. In combination with the outer surface of the cooling unit 4, a liquid inlet pipe 51 and a liquid discharge pipe 52 are sequentially provided along the length direction. The coolant in the outer sleeve 41 is replenished through the liquid inlet pipe 51, and the coolant in the outer sleeve 41 is extracted through the liquid discharge pipe 52, so that the coolant in the outer sleeve 41 always maintains a low temperature to ensure cooling efficiency, so that the coolant in the outer sleeve 41 cools the high-temperature smoke in the cooling pipe 44 and is then discharged through the smoke exhaust hood 43, thereby reducing the impact on the environment and being more environmentally friendly; and the extracted heat-carrying coolant can be recycled, and the liquid inlet pipe 51 and the liquid discharge pipe 52 can be connected through a hot furnace or a condenser for heating or circulating coolant.

Claims

1. A flue gas treatment device for a furnace in an aluminum alloy production line, characterized by: It includes a furnace (1), a purification tank (2), a smoke exhaust pipe (3), a cooling unit (4) and a circulation unit (5); The flue gas output end of the furnace (1) is connected to the input end of the purification tank (2) through a pipeline, the output end of the purification tank (2) is connected to one end of the exhaust pipe (3), and the other end of the exhaust pipe (3) is connected to the input end of the cooling unit (4). The circulation unit (5) includes a liquid inlet pipe (51) and a liquid discharge pipe (52), and the outer surface of the cooling unit (4) is provided with a liquid inlet pipe (51) and a liquid discharge pipe (52) in sequence along the length direction.

2. The aluminum alloy production line furnace flue gas treatment device according to claim 1, characterized in that: The cooling unit (4) includes an outer sleeve (41), a smoke inlet hood (42), a smoke exhaust hood (43), a cooling pipeline (44) and a flange (45); A flange (45) is provided at one end of the outer sleeve (41), a smoke inlet hood (42) and a cooling pipeline (44) are sequentially provided inside the one end of the outer sleeve (41), a smoke exhaust hood (43) is provided inside the other end of the outer sleeve (41), and the smoke hood (42), the cooling pipeline (44) and the smoke exhaust hood (43) are internally connected.

3. The aluminum alloy production line furnace flue gas treatment device according to claim 2, characterized in that: The flange (45) at one end of the outer sleeve (41) is connected to the end of the smoke exhaust pipe (3) via a fixing bolt (46).

4. The aluminum alloy production line furnace flue gas treatment device according to claim 2, characterized in that: The smoke inlet hood (42) and the smoke exhaust hood (43) are evenly arranged in a funnel shape.

5. The aluminum alloy production line furnace flue gas treatment device according to claim 4, characterized in that: The outer surface of the large diameter end of the smoke inlet cover (42) is welded and fixed to the inner wall of one end of the outer sleeve (41).

6. The aluminum alloy production line furnace flue gas treatment device according to claim 4, characterized in that: The outer circumferential surface of the large-diameter end of the exhaust hood (43) is welded and fixed to the inner wall of the other end of the outer sleeve (41).

7. The aluminum alloy production line furnace flue gas treatment device according to claim 6, characterized in that: A filter (47) is embedded in the interior of the smoke exhaust hood (43).

8. The aluminum alloy production line furnace flue gas treatment device according to claim 2, characterized in that: The cooling pipeline (44) is arranged in a spiral coil.

9. The aluminum alloy production line furnace flue gas treatment device according to claim 8, characterized in that: The inner diameter of the cooling pipeline (44) is smaller than the inner diameter of the smoke exhaust pipe (3).

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