A multi-stage filtering and purifying device for smoke dust of alloy aluminum ingot smelting furnace for automobile parts

Abstract

The application discloses a kind of alloy aluminum ingot smelting furnace smoke dust multistage filtering purification device for automobile parts, and relates to the field of filtering and purifying device, including machine body and circulating mechanism, the side of the machine body is provided with circulating mechanism, the top of the circulating mechanism is provided with driving mechanism, the inside top end of the machine body is provided with extraction mechanism, the top side of the machine body is provided with air outlet mechanism, the inside of the machine body is equipped with stirring assembly.The application realizes the whole machine integration synchronous operation by motor multidirectional linkage driving structure, and single driving motor drives air extraction, air exhaust, water circulation and stirring assembly to run synchronously by bevel gear and sprocket respectively, so as to simplify power configuration, reduce equipment energy consumption, smoke dust is washed under liquid surface to realize preliminary dust dissolving, stirring blade accelerates fine dust to dissolve into water, rubber cleaning plate synchronously scrapes off dust on cylinder wall, and slanted bottom cooperates with detachable dust collection bin to realize automatic collection of waste residue, which greatly improves smoke purification efficiency and equipment self-cleaning ability.

Description

Technical Field

[0001] This invention relates to the field of filtration and purification devices, specifically a multi-stage filtration and purification device for flue gas from an alloy aluminum ingot smelting furnace for automotive parts. Background Technology

[0002] Against the backdrop of the rapid development of the automotive parts manufacturing industry, aluminum alloy ingots are key raw materials for die casting and machining parts. The smelting process generates a large amount of high-temperature fumes containing aluminum dust and oxide particles.

[0003] Currently, conventional aluminum smelting fume purification mostly adopts a split-type dust removal structure. During operation, a separate induced draft fan draws the smelting furnace fume into a water washing chamber. The fume is immersed in water to achieve dust adsorption and sedimentation. Wastewater in the chamber is periodically extracted by an external water pump, filtered through a simple filter screen, and partially reused. The purified flue gas is directly discharged to the outside by another exhaust device. The dust accumulation on the side walls of the chamber and the waste residue at the bottom are cleaned manually by stopping the machine and opening the cover. The entire set of equipment is equipped with independent motors for induced draft, water circulation, and agitation exhaust, and each system is started and stopped separately.

[0004] Existing dust removal equipment uses separate motor drives, resulting in high power consumption, numerous parts, high failure rate, high maintenance costs, and significant space costs. In addition, the circulating water filtration is rudimentary, unable to trap impurities of all sizes, leading to poor wastewater reuse, high water consumption, and frequent wastewater discharge causing secondary pollution, thus wasting water resources. Summary of the Invention

[0005] Based on this, the purpose of this invention is to provide a multi-stage filtration and purification device for flue gas from an alloy aluminum ingot smelting furnace for automotive parts, in order to solve the technical problems of existing dust removal equipment using separate motor drives, which occupy a lot of space and cost, and the simple circulating water filtration which cannot intercept impurities of all sizes, thus causing waste of water resources.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage filtration and purification device for flue gas from an alloy aluminum ingot smelting furnace for automotive parts, comprising a body and a circulation mechanism. A circulation mechanism is fixedly installed on one side of the body, and a drive mechanism is fixedly installed on the top of the circulation mechanism. An extraction mechanism for extracting flue gas is installed at the top of the interior of the body. An exhaust mechanism for discharging purified gas is installed on one side of the top of the body. A stirring assembly for accelerating the fusion of flue gas and water is installed inside the body. The drive mechanism includes a drive motor, a drive shaft, a bevel gear set, and a first transmission shaft. The drive motor is fixedly connected to the top of the circulation mechanism, and its output end is fixedly connected to the drive shaft. The drive shaft is connected to the first transmission shaft via the bevel gear set. The circulation mechanism includes a circulating water tank, a water pump, and a filter assembly. The water pump is located inside the circulating water tank and is connected to the drive shaft, with its pumping end fixedly connected to the filter assembly. The extraction mechanism includes a first fan, which is fixedly connected to the top of the first transmission shaft. The exhaust mechanism includes a second fan, which is fixedly connected to one end of the drive shaft.

[0007] By adopting the above technical solution, this invention achieves integrated synchronous operation of the entire machine through a multi-directional linkage drive structure of motors. A single drive motor drives the ventilation, exhaust, water circulation, and stirring components to operate synchronously through bevel gears and sprockets, simplifying power configuration and reducing equipment energy consumption. Smoke and dust are initially dissolved by water washing at the liquid surface, and stirring blades accelerate the dissolution of fine smoke and dust into the water. Rubber cleaning plates simultaneously scrape off dust accumulated on the cylinder wall, and the sloping bottom combined with a detachable ash collection bin enables automatic collection of waste residue, significantly improving smoke and dust purification efficiency and equipment self-cleaning ability. At the same time, multi-stage water circulation filtration combined with an exhaust gas drying structure achieves water resource recycling and compliant exhaust. The multi-layer graded filter components progressively intercept impurities in the water, and the one-way valve and baffle plate prevent sewage backflow. The purified water can be repeatedly recycled to save water. The purified exhaust gas is dehydrated by the drying components before being discharged by the fan, forming a complete system with wet dust removal, which reduces sewage discharge pollution and ensures clean exhaust gas emissions, simultaneously improving environmental protection and economy.

[0008] Furthermore, the extraction mechanism also includes an air supply pipe, with the bottom of the first fan fixedly connected to the air supply pipe leading into the machine body, and the bottom end of the air supply pipe extending below the clean water level inside the machine body, so that the extracted high-temperature dust can directly and fully contact the clean water. The extraction mechanism also includes an air inlet, which is fixedly connected to one side of the first fan, and its port is connected to the exhaust port of the smelting furnace through a high-temperature resistant pipe.

[0009] By adopting the above technical solution, the first fan can draw in the smoke and dust through the air inlet and then send it into the machine body through the air duct. The bottom end of the air duct extends into the machine body and is located in the water level inside the machine body. Therefore, after the smoke and dust enter the machine body, it will first come into contact with the clean water inside the machine body.

[0010] Furthermore, the stirring assembly includes a connecting rod, stirring blades, and a cleaning plate. The connecting rod is fixed between the bottom of the first drive shaft and the stirring blades. The cleaning plate is made of wear-resistant rubber and is fixed to the outer edge of the stirring blades. It can scrape off the dust and impurities attached to the inner wall of the machine as the stirring blades rotate.

[0011] By adopting the above technical solution, the bottom of the first drive shaft is connected to the stirring blades via a connecting rod. Therefore, when the first drive shaft rotates, it will rotate the stirring blades together, thereby accelerating the fusion rate of small particulate impurities and clean water. In addition, a cleaning plate is installed on the outside of the stirring blades to clean the inner wall of the machine body and prevent impurities from remaining on the side wall of the machine body.

[0012] Furthermore, the circulation mechanism also includes a one-way valve and a baffle plate. The one-way valve is fixed to the connection between the circulating water tank and the machine body, allowing only clean water to flow from the circulating water tank into the machine body. The baffle plate is fixed to the bottom of the circulating water tank, preventing wastewater containing impurities from entering the circulating water tank. The bottom of the machine body is provided with a sloping bottom, which is inclined towards the ash collection bin. The surface is coated with an anti-stick coating, which allows the settled dust and impurities to automatically collect in the ash collection bin under gravity and prevents them from sticking. The ash collection bin is detachably and sealed to the bottom of the circulating water tank by bolts. It is provided with a non-slip insulated handle on its outside, which can be removed after the machine is stopped to clean the accumulated dust and ash inside. The filter assembly adopts a multi-layer stainless steel filter screen stacked structure, with the filter screen pore size decreasing from the outside to the inside, which can filter impurities of different particle sizes in the clean water step by step. Combined with the water circulation function of the circulating water tank, the clean water can be reused.

[0013] By adopting the above technical solution, the clean water enters the machine body after passing through the filter component, and the impurities it carries are filtered out by the filter component. The clean water then overflows from the top area of ​​the circulating water tank into the machine body. A one-way valve is set at the connection area between the top of the circulating water tank and the machine body, so the clean water can only enter the machine body from the circulating water tank and cannot enter the circulating water tank from the machine body.

[0014] Furthermore, the drive mechanism also includes a sprocket assembly and a second drive shaft. The drive shaft is connected to the second drive shaft via the sprocket assembly. The second drive shaft is fixedly connected to the output end of the water pump, which enables a single drive motor to simultaneously drive the extraction, stirring and water circulation systems to operate synchronously.

[0015] By adopting the above technical solution, the output end of the drive motor drives the extraction mechanism and the air outlet mechanism to start simultaneously through a fixedly installed drive shaft.

[0016] Furthermore, the air outlet mechanism also includes a connecting pipe and a drying component. One end of the connecting pipe extends into the top space inside the machine body, and the other end is connected to the air inlet of the second fan. The drying component is installed at the air inlet of the connecting pipe and is filled with desiccant, which can adsorb water in the purified gas.

[0017] By adopting the above technical solution, the clean air will rise to the top, and when the drive shaft rotates, the second fan will draw air from the inside of the machine through the connecting pipe, which can remove the filtered clean air. When the air enters the connecting pipe, it will pass through the drying component first to dry the air, so that it can be easily discharged.

[0018] In summary, the present invention has the following beneficial effects: The present invention achieves integrated synchronous operation of the whole machine through a multi-directional linkage drive structure of motors. A single drive motor drives the ventilation, exhaust, water circulation, and stirring components to operate synchronously by means of bevel gears and sprockets, which simplifies the power configuration and reduces equipment energy consumption. Smoke and dust are introduced into the liquid surface for initial dust dissolution. Stirring blades accelerate the dissolution of fine smoke and dust into the water. Rubber cleaning plates simultaneously scrape off the dust accumulated on the cylinder wall. The sloping bottom combined with a detachable ash collection bin enables automatic collection of waste residue, which greatly improves the efficiency of smoke and dust purification and the self-cleaning ability of the equipment. At the same time, the multi-stage filtration of water circulation combined with the exhaust gas drying structure achieves water resource circulation and compliant exhaust. The multi-layer graded filter components trap impurities in the water step by step. With the help of one-way valves and baffle plates, sewage backflow is prevented. The purified water can be repeatedly recycled to save water. The purified exhaust gas is dried by the drying components before being discharged by the fan. It forms a complete set with the wet dust removal function, which reduces sewage discharge pollution and ensures clean exhaust gas emissions, thus improving both environmental protection and economy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a first-view structural schematic diagram of some parts of the present invention; Figure 3 This is a second-view structural schematic diagram of some parts of the present invention; Figure 4 This is a side sectional view of some parts of the present invention; Figure 5 This is a cross-sectional view of some parts of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point A; Figure 7 This is a first-view structural schematic diagram of a partial part of the present invention; Figure 8 This is a first-view structural schematic diagram of a partial component of the present invention.

[0020] In the diagram: 1. Main body; 2. Circulation mechanism; 201. Circulating water tank; 202. Water pump; 203. Filter assembly; 204. One-way valve; 205. Baffle plate; 3. Drive mechanism; 301. Drive motor; 302. Drive shaft; 303. Bevel gear set; 304. First transmission shaft; 305. Sprocket set; 306. Second transmission shaft; 4. Extraction mechanism; 401. First fan; 402. Air duct; 403. Air inlet; 5. Air outlet mechanism; 501. Second fan; 502. Connecting pipe; 503. Drying assembly; 6. Stirring assembly; 601. Connecting rod; 602. Stirring blades; 603. Cleaning plate; 7. Sloping bottom; 8. Ash collection bin. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] The embodiments of the present invention will now be described.

[0023] A multi-stage filtration and purification device for flue gas from an alloy aluminum ingot smelting furnace for automotive parts, such as Figure 1-8 As shown, the device includes a body 1 and a circulation mechanism 2. The circulation mechanism 2 is fixedly installed on one side of the body 1, and a drive mechanism 3 is fixedly installed on the top of the circulation mechanism 2. An extraction mechanism 4 for extracting smoke and dust is installed at the top of the inside of the body 1. An air outlet mechanism 5 for discharging purified gas is installed on one side of the top of the body 1. A stirring component 6 for accelerating the fusion of smoke and dust with water is installed inside the body 1. The drive mechanism 3 drives the extraction mechanism 4 to work, extracting smoke and dust from the external smelting furnace and sending the smoke and dust into the body 1. Then the smoke and dust will combine with the cleaning water inside the body 1. Large particles of impurities in the smoke and dust will sink to the bottom of the body 1, while small particles of impurities will fuse with the cleaning water. After that, the cleaned air will be drawn away by the air outlet mechanism 5 and transported to the outside. Furthermore, the drive mechanism 3 includes a drive motor 301, a drive shaft 302, a bevel gear set 303, and a first transmission shaft 304. The drive motor 301 is fixed to the top of the circulation mechanism 2, and its output end is fixed to the drive shaft 302. The drive shaft 302 is connected to the first transmission shaft 304 through the bevel gear set 303. The circulation mechanism 2 includes a circulating water tank 201, a water pump 202, and a filter assembly 203. The water pump 202 is located inside the circulating water tank 201 and is connected to the drive shaft 302. Its pumping end is fixed to the filter assembly 203. The extraction mechanism 4 includes a first fan 401, which is fixed to the top of the first transmission shaft 304. The air outlet mechanism 5 includes a second fan 501, which is fixed to one end of the drive shaft 302. In the example, the extraction mechanism 4 also includes an air supply pipe 402. The bottom of the first fan 401 is fixedly connected to the air supply pipe 402 that enters the interior of the machine body 1, and the bottom end of the air supply pipe 402 extends below the surface of the clean water inside the machine body 1, so that the extracted high-temperature dust can directly and fully contact the clean water. The extraction mechanism 4 also includes an air inlet 403, which is fixedly connected to one side of the first fan 401, and its port is connected to the exhaust port of the smelting furnace through a high-temperature resistant pipe. The first fan 401 can draw in the smoke and dust through the air inlet 403 and then send it into the body 1 through the air duct 402. The bottom end of the air duct 402 extends into the body 1 and is located in the water level inside the body 1. Therefore, after the smoke and dust enter the body 1, it will first come into contact with the clean water inside the body 1. In the example, the stirring assembly 6 includes a connecting rod 601, a stirring blade 602, and a cleaning plate 603. The connecting rod 601 is fixed between the bottom of the first drive shaft 304 and the stirring blade 602. The cleaning plate 603 is made of wear-resistant rubber and is fixed to the outer edge of the stirring blade 602. It can scrape off the dust and impurities attached to the inner wall of the machine body 1 as the stirring blade 602 rotates. The bottom of the first drive shaft 304 is connected to the stirring blade 602 via the connecting rod 601. Therefore, when the first drive shaft 304 rotates, it will rotate the stirring blade 602 together, thereby accelerating the fusion rate of small particulate impurities and clean water. In addition, a cleaning plate 603 is installed on the outside of the stirring blade 602, which can clean the inner wall of the machine body 1 and prevent impurities from remaining on the side wall of the machine body 1. In the example, the circulation mechanism 2 also includes a one-way valve 204 and a baffle plate 205. The one-way valve 204 is fixed to the connection between the circulating water tank 201 and the body 1, allowing only clean water to flow from the circulating water tank 201 into the body 1. The baffle plate 205 is fixed to the bottom of the circulating water tank 201, which can prevent sewage containing impurities in the body 1 from entering the circulating water tank 201. The filter assembly 203 adopts a multi-layer stainless steel filter screen stacked structure, with the filter screen pore size decreasing from the outside to the inside, which can filter impurities of different particle sizes in the clean water step by step. Combined with the water circulation function of the circulating water tank 201, the clean water can be reused. Furthermore, the clean water inside the body 1 is filtered and circulated through the circulation mechanism 2. One end of the drive shaft 302 is connected to the second transmission shaft 306 through the sprocket assembly 305, thereby driving the water pump 202 to work. The water pump 202 draws clean water from inside the body 1 through the channel equipped with the filter assembly 203. After passing through the filter assembly 203, the clean water enters the circulating water tank 201, and the impurities it carries are filtered out by the filter assembly 203. The clean water then overflows from the top area inside the circulating water tank 201 into the body 1. A one-way valve 204 is set at the connection area between the top of the circulating water tank 201 and the body 1, so that the clean water can only enter the body 1 from the circulating water tank 201 and cannot enter the circulating water tank 201 from the body 1. Furthermore, the bottom of the machine body 1 is provided with a sloping bottom 7, which is inclined towards the ash collection bin 8. The surface is coated with an anti-stick coating, which allows the settled dust and impurities to automatically collect into the ash collection bin 8 under the action of gravity and are not easy to stick together. The ash collection bin 8 is detachably and sealed to the bottom of the circulating water tank 201 by bolts. Its outer side is provided with an anti-slip insulated handle, which can be removed after the machine is stopped to clean the accumulated dust and ash inside. In the example, the drive mechanism 3 also includes a sprocket set 305 and a second drive shaft 306. The drive shaft 302 is connected to the second drive shaft 306 through the sprocket set 305. The second drive shaft 306 is fixedly connected to the output end of the water pump 202, which can realize that a single drive motor 301 can simultaneously drive the extraction, stirring and water circulation system to operate synchronously. The output of the drive motor 301 drives the extraction mechanism 4 and the air outlet mechanism 5 to start simultaneously via the fixedly installed drive shaft 302. Furthermore, the air outlet mechanism 5 also includes a connecting pipe 502 and a drying component 503. One end of the connecting pipe 502 extends into the top space inside the body 1, and the other end is connected to the air inlet of the second fan 501. The drying component 503 is installed at the air inlet of the connecting pipe 502 and is filled with desiccant, which can adsorb water in the purified gas. The clean air will rise to the top, and when the drive shaft 302 rotates, the second fan 501 will draw air from inside the body 1 through the connecting pipe 502, which can remove the filtered clean air. When the air enters the connecting pipe 502, it will pass through the drying component 503 to dry the air, so that it can be easily discharged.

[0024] The working principle of this invention is as follows: When in use, when the power is turned on, the drive mechanism 3 will first drive the extraction mechanism 4 to work, extracting the smoke and dust from the external smelting furnace and sending the smoke and dust into the machine body 1. Then the smoke and dust will combine with the cleaning water inside the machine body 1. Then the large particles of impurities in the smoke and dust will sink to the bottom of the machine body 1, and the small particles of impurities will merge with the cleaning water. After that, the cleaned air will be drawn away by the air outlet mechanism 5 and transported to the outside. After the drive mechanism 3 is started, the output end of the drive motor 301 drives the extraction mechanism 4 and the air outlet mechanism 5 to start simultaneously through the fixedly installed drive shaft 302. The end of the drive shaft 302 is connected to the first transmission shaft 304 through the bevel gear set 303. The first fan 401 is installed on the outer wall of the first transmission shaft 304. Therefore, the drive motor 301 can drive the first fan 401 to work through the cooperation of the drive shaft 302 and the bevel gear set 303. The first fan 401 can draw in smoke and dust through the air inlet 403, and then send it into the body 1 through the air duct 402. The bottom end of the air duct 402 extends into the body 1 and is located in the water level inside the body 1. Therefore, after the smoke and dust enter the body 1, it will first come into contact with the clean water inside the body 1. Large particles of impurities will quickly settle to the bottom of the machine body 1 due to their own gravity, and then enter the ash collection bin 8 along the inclined bottom 7. The baffle plate 205 prevents water inside the machine body 1 from entering the circulating water tank 201. Small particles of impurities will mix with the clean water. A stirring assembly 6 is installed at the bottom of the first drive shaft 304. The bottom of the first drive shaft 304 is connected to the stirring blade 602 through the connecting rod 601. Therefore, when the first drive shaft 304 rotates, it will rotate the stirring blade 602 together, thereby accelerating the mixing rate of small particles of impurities with clean water. Furthermore, a cleaning plate 603 is installed on the outside of the stirring blade 602, so that when the stirring blade 602 rotates, the inner wall of the machine body 1 can be cleaned at the same time to prevent impurities from remaining on the side wall of the machine body 1. The clean air will then rise to the top, and when the drive shaft 302 rotates, its outer wall is also connected to a second fan 501. When the second fan 501 works, it will draw air from inside the body 1 through the connecting pipe 502, which can remove the filtered clean air. When the gas enters the connecting pipe 502, it will first pass through the drying component 503 to dry the gas, so that it can be easily discharged. The clean water inside the body 1 is filtered and circulated through the circulation mechanism 2. One end of the drive shaft 302 is connected to the second transmission shaft 306 through the sprocket set 305, thereby driving the water pump 202 to work. The water pump 202 draws clean water from inside the body 1 through the channel where the filter assembly 203 is installed. The clean water enters the circulating water tank 201 after passing through the filter component 203, and the impurities it carries are filtered out by the filter component 203. The clean water then overflows from the top area of ​​the circulating water tank 201 into the body 1. A one-way valve 204 is set at the connection area between the top of the circulating water tank 201 and the body 1, so that the clean water can only enter the body 1 from the circulating water tank 201 and cannot enter the circulating water tank 201 from the body 1. When maintenance and cleaning are required, the clean water in the circulating water tank 201 can be first drawn away through the pipe on one side of the circulating water tank 201. Then the water level of the clean water in the machine body 1 will drop with impurities. After that, the impurities in the machine body 1 will flow into the ash collection bin 8 through the sloping bottom 7 at the bottom of the machine body 1 with the water flow and gravity. The ash collection bin 8 is installed inside the bottom of the circulating water tank 201 by bolt sealing. During maintenance and cleaning, you only need to use a tool to remove the bolts, and then you can take the ash collection bin 8 out of the circulating water tank 201 by the handle, and then take out the ash collection bin 8 to clean the impurities inside. The above structure can solve the technical problems of existing dust removal equipment that use separate motors for driving, which takes up a lot of space and costs, and whose circulating water filtration is rudimentary and cannot catch impurities of all sizes, thus wasting water resources.

[0025] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A multi-stage filtration and purification device for flue gas from an alloy aluminum ingot smelting furnace for automotive parts, comprising a body (1) and a circulation mechanism (2), characterized in that: A circulation mechanism (2) is fixedly provided on one side of the body (1), a drive mechanism (3) is fixedly provided on the top of the circulation mechanism (2), an extraction mechanism (4) for extracting smoke and dust is provided at the top of the body (1), an air outlet mechanism (5) for discharging purified gas is provided on one side of the top of the body (1), and a stirring component (6) for accelerating the fusion of smoke and dust with water is provided inside the body (1). The drive mechanism (3) includes a drive motor (301), a drive shaft (302), a bevel gear set (303), and a first transmission shaft (304). The drive motor (301) is fixed to the top of the circulation mechanism (2), and its output end is fixed to the drive shaft (302). The drive shaft (302) is connected to the first transmission shaft (304) through the bevel gear set (303). The circulation mechanism (2) includes a circulating water tank (201), a water pump (202), and a filter assembly (203). The water pump (202) is located inside the circulating water tank (201) and is connected to the drive shaft (302). Its pumping end is fixed to the filter assembly (203). The extraction mechanism (4) includes a first fan (401), which is fixed to the top of the first transmission shaft (304). The air outlet mechanism (5) includes a second fan (501), which is fixed to one end of the drive shaft (302).

2. The multi-stage filtration and purification device for flue gas from the smelting furnace of aluminum alloy ingots for automotive parts according to claim 1, characterized in that: The extraction mechanism (4) also includes an air duct (402), the bottom of the first fan (401) is fixedly connected to the air duct (402) which enters the interior of the machine body (1), and the bottom end of the air duct (402) extends below the surface of the clean water inside the machine body (1), so that the extracted high-temperature dust can come into full contact with the clean water.

3. The multi-stage filtration and purification device for flue gas from the smelting furnace of aluminum alloy ingots for automotive parts according to claim 1, characterized in that: The stirring assembly (6) includes a connecting rod (601), a stirring blade (602), and a cleaning plate (603). The connecting rod (601) is fixed between the bottom of the first drive shaft (304) and the stirring blade (602). The cleaning plate (603) is made of wear-resistant rubber and is fixed to the outer edge of the stirring blade (602). It can scrape off the dust and impurities attached to the inner wall of the machine body (1) as the stirring blade (602) rotates.

4. The multi-stage filtration and purification device for flue gas from the smelting furnace of aluminum alloy ingots for automotive parts according to claim 1, characterized in that: The circulation mechanism (2) also includes a one-way valve (204) and a baffle plate (205). The one-way valve (204) is fixed to the connection between the circulating water tank (201) and the machine body (1), allowing only clean water to flow from the circulating water tank (201) into the machine body (1). The baffle plate (205) is fixed to the bottom of the circulating water tank (201), preventing wastewater containing impurities in the machine body (1) from entering the circulating water tank (201).

5. The multi-stage filtration and purification device for flue gas from an alloy aluminum ingot smelting furnace for automotive parts according to claim 1, characterized in that: The drive mechanism (3) also includes a sprocket assembly (305) and a second drive shaft (306). The drive shaft (302) is connected to the second drive shaft (306) via the sprocket assembly (305). The second drive shaft (306) is fixedly connected to the output end of the water pump (202), which enables a single drive motor (301) to simultaneously drive the extraction, stirring and water circulation systems to operate synchronously.

6. The multi-stage filtration and purification device for flue gas from the smelting furnace of aluminum alloy ingots for automotive parts according to claim 1, characterized in that: The machine body (1) has an inclined bottom (7) at the bottom inside. The inclined bottom (7) is inclined towards the ash collection bin (8) and the surface is coated with an anti-stick coating, which allows the settled dust and impurities to automatically gather in the ash collection bin (8) under the action of gravity and not easily stick together.

7. The multi-stage filtration and purification device for flue gas from an alloy aluminum ingot smelting furnace for automotive parts according to claim 1, characterized in that: The ash collection bin (8) is detachably and sealed inside the circulating water tank (201) by bolts. It is equipped with a non-slip insulated handle on its outside, which can be removed and cleaned after the machine is stopped.

8. The multi-stage filtration and purification device for flue gas from the smelting furnace of aluminum alloy ingots for automotive parts according to claim 1, characterized in that: The air outlet mechanism (5) also includes a connecting pipe (502) and a drying component (503). One end of the connecting pipe (502) extends into the top space inside the body (1), and the other end is connected to the air inlet of the second fan (501). The drying component (503) is installed at the air inlet of the connecting pipe (502) and is filled with desiccant, which can adsorb water in the purified gas.

9. The multi-stage filtration and purification device for flue gas from an alloy aluminum ingot smelting furnace for automotive parts according to claim 1, characterized in that: The extraction mechanism (4) also includes an air inlet (403), which is fixed to one side of the first fan (401), and its port is connected to the exhaust port of the smelting furnace through a high-temperature resistant pipe.

10. The multi-stage filtration and purification device for flue gas from the smelting furnace of aluminum alloy ingots for automotive parts according to claim 1, characterized in that: The filter assembly (203) adopts a multi-layer stainless steel filter screen stacked structure, with the filter screen pore size decreasing from the outside to the inside. It can filter impurities of different particle sizes in the clean water step by step. Combined with the water circulation function of the circulating water tank (201), it can realize the reuse of clean water.

Images