Anode roasting flue gas treatment device and process

Abstract

The invention relates to the technical field of flue gas treatment, and provides an anode roasting flue gas treatment device and technology.The anode roasting flue gas treatment device comprises a flue gas treater, four cooling fans are arranged in the flue gas treater, a tar collecting tank is arranged below the cooling fans, flue gas ascends to drive the cooling fans to rotate, and then centrifugal force is used for extracting external cold air to cool the flue gas; and a centrifugal filtering mechanism is arranged above the cooling fan and used for filtering solid particles in the smoke, and a first electrostatic adsorption net and a second electrostatic adsorption net are arranged above the centrifugal filtering mechanism and used for adsorbing small particles in the smoke. By means of the technical scheme, the problems that in existing anode roasting flue gas treatment, equipment is large in size, complex in structure and high in energy consumption are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to an anode baking flue gas treatment device and process. Background Art

[0002] Anode roasting is an important process in the electrolytic aluminum industry. It uses coke oven gas, natural gas or heavy oil as fuel to roast the raw anode carbon blocks under high temperature conditions to carbonize them at high temperature. During this process, a large amount of flue gas will be generated, which contains pollutants such as tar, particulate matter, and sulfur dioxide.

[0003] At present, the main methods for anode roasting flue gas treatment include electrostatic precipitator, alkaline solution absorption wet purification, alumina dry adsorption and slaked lime dry adsorption. These methods have their own advantages and disadvantages. For example, electrostatic precipitator can effectively capture smoke dust of 0.1μm or even less than 0.1μm, with a high dust collection efficiency of more than 99.99%. However, a single treatment plan often has certain limitations, and these devices are large in size, with high installation and use costs, and high operation and maintenance costs. Summary of the invention

[0004] The present invention provides an anode baking flue gas treatment device and process, which solves the problems of large equipment size, complex structure and high energy consumption in the related technology.

[0005] The existing anode baking flue gas treatment device is large in size and has high operation and maintenance costs, which makes it difficult to meet the needs of energy conservation and emission reduction.

[0006] The technical solution of the present invention is as follows: An anode roasting flue gas treatment device and process, comprising a flue gas processor, wherein a flue gas inlet is provided at the lower end of the flue gas processor, a flue gas outlet is provided at the upper end of the flue gas processor, a cold air mixing pipe is passed through one side of the flue gas inlet, a first rotating joint is rotatably connected to the upper end of the cold air mixing pipe, a rotating ventilation pipe is rotatably connected to the first rotating joint, a first cooling fan is fixedly connected to the rotating ventilation pipe, a second cooling fan is provided above the first cooling fan, a third cooling fan is provided above the second cooling fan, a fourth cooling fan is provided above the third cooling fan, a first conical collecting plate is provided below the fourth cooling fan, a second conical collecting plate is provided below the third cooling fan, a third conical collecting plate is provided below the second cooling fan, and a tar collecting tank is provided below the first cooling fan; The upper end of the rotating ventilation pipe is fixedly connected to a rotating water inlet pipe, the upper end of the rotating water inlet pipe is rotatably connected to a second rotating connector, the upper end of the second rotating connector is rotatably connected to the water inlet pipe, a centrifugal filtration mechanism is arranged on the water inlet pipe, a first electrostatic adsorption net and a second electrostatic adsorption net are arranged above the centrifugal filtration mechanism, an electrostatic generating mechanism is arranged between the first electrostatic adsorption net and the second electrostatic adsorption net and the rotating water inlet pipe, an adsorption net cleaning brush is arranged between the first electrostatic adsorption net and the second electrostatic adsorption net, and the adsorption net cleaning brush is fixedly mounted on the rotating water inlet pipe.

[0007] Furthermore, the blades of the first cooling fan are made of aluminum alloy, and the blades of the first cooling fan are hollow, and a cold air channel is arranged inside the blades, and the cold air channel is connected to the rotating ventilation pipe. The second cooling fan, the third cooling fan and the fourth cooling fan have the same structure as the first cooling fan.

[0008] Furthermore, the first conical collecting plate, the second conical collecting plate and the third conical collecting plate are all fixedly connected to the inner wall of the flue gas processor, and gaps for tar to flow through are arranged between the first conical collecting plate, the second conical collecting plate and the third conical collecting plate and the inner wall of the flue gas processor, and the first conical collecting plate, the second conical collecting plate and the third conical collecting plate are all frustum-shaped, and the upper end openings of the first conical collecting plate, the second conical collecting plate and the third conical collecting plate are all smaller than the lower end openings, and the upper end opening diameters of the first conical collecting plate, the second conical collecting plate and the third conical collecting plate are smaller than the diameters of the first cooling fan, the second cooling fan, the third cooling fan and the fourth cooling fan.

[0009] Furthermore, the tar collection tank is arranged around the bottom of the flue gas processor, the tar collection tank is annular, the inner diameter of the tar collection tank is smaller than the diameters of the first cooling fan, the second cooling fan, the third cooling fan and the fourth cooling fan, and a tar discharge pipe is arranged on one side of the tar collection tank.

[0010] Furthermore, the rotating ventilation pipe is fixedly connected to the rotating water inlet pipe, and the rotating ventilation pipe and the rotating water inlet pipe are sealed and separated.

[0011] Furthermore, the centrifugal filter mechanism comprises a conical base, the conical base is fixedly connected with a centrifugal filter cartridge on all sides, the centrifugal filter cartridge is rotatably connected with an annular baffle on all sides, and the annular baffle is fixedly connected to the inner wall of the flue gas processor.

[0012] Furthermore, water spray holes are formed around one end of the rotating water inlet pipe located inside the centrifugal filter cartridge, the water spray holes are located higher than the centrifugal filter cartridge, and the conical base is low around and high in the middle.

[0013] Further, the electrostatic generating mechanism includes a positioning bracket, the outer side of the rotating water inlet pipe is fixedly connected with a positioning bracket, the positioning bracket is provided with four groups, the positioning brackets are evenly distributed around the rotating water inlet pipe, the outer side of the positioning bracket is movably connected with a friction shoe, the inner side of the friction shoe is fixedly connected with a positioning rod, and the positioning rod passes through the positioning bracket; The first electrostatic adsorption net and the second electrostatic adsorption net are both fixedly installed on the inner wall of the flue gas processor, and the first electrostatic adsorption net and the second electrostatic adsorption net are both insulated and connected to the inner wall of the flue gas processor, and friction rings are fixedly connected to the inner sides of the first electrostatic adsorption net and the second electrostatic adsorption net.

[0014] Furthermore, the friction ring on the inner side of the first electrostatic adsorption net is made of glass, the friction shoe on the inner side of the first electrostatic adsorption net is made of polytetrafluoroethylene, the friction ring on the inner side of the second electrostatic adsorption net is made of polytetrafluoroethylene, and the friction shoe on the inner side of the second electrostatic adsorption net is made of glass.

[0015] The present invention provides another technical solution: an anode baking flue gas treatment process, comprising the following steps: S1. Cooling by mixing with cold air: Place the flue gas processor vertically, with the flue gas inlet facing downward and the flue gas outlet facing upward, and then introduce the flue gas from the 36-chamber anode baking furnace into the flue gas processor through the flue gas inlet. Use the rising power of the high-temperature flue gas to drive the first cooling fan, the second cooling fan, the third cooling fan and the fourth cooling fan to rotate together. When the first cooling fan, the second cooling fan, the third cooling fan and the fourth cooling fan rotate, use the centrifugal force to throw the air in the cold air channel of the blades to the surroundings, thereby reducing the pressure in the rotating ventilation pipe, and then the mixing cold air pipe draws low-temperature cold air from the outside and injects it into the flue gas processor through the cold air channel of the blades, and mixes with the high-temperature flue gas to cool it down; S2. Tar condensation: When cold air flows through the cold air channel, the aluminum alloy blades will be quickly cooled, so that the tar in the flue gas will condense on the outer surfaces of the blades of the first cooling fan, the second cooling fan, the third cooling fan and the fourth cooling fan to form tar droplets. Then, the rotating centrifugal force of the first cooling fan, the second cooling fan, the third cooling fan and the fourth cooling fan is used to make the tar flow along the outer surface of the blade to the end of the blade and be thrown out. Since the upper end opening diameters of the first conical collecting plate, the second conical collecting plate and the third conical collecting plate are smaller than the diameters of the first cooling fan, the second cooling fan, the third cooling fan and the fourth cooling fan, the thrown tar can only fall on the inner wall of the flue gas processor and the outer sides of the first conical collecting plate, the second conical collecting plate and the third conical collecting plate, and then flow along the inner wall of the flue gas processor to the tar collection tank for centralized storage and discharge through the tar discharge pipe; S3. Centrifugal filtration: When the flue gas continues to rise after being cooled and initially cleaned of tar, it will be blocked by the annular baffle and can only pass through the centrifugal filter cartridge. As a result, the solid particles in the flue gas will be blocked on the outside by the centrifugal filter cartridge, thus achieving filtration of solid particles in the flue gas; S4. Chemical adsorption: Sodium carbonate solution is injected through the water inlet pipe and sprayed out through the water spray hole. After being sprayed out through the water spray hole, the sodium carbonate solution will flush the centrifugal filter cartridge from the inside to the outside, dissolve the tar on the centrifugal filter cartridge, and absorb harmful gases in the flue gas. At the same time, the solid particles and dissolved tar attached to the outside of the centrifugal filter cartridge are thrown out to the inner wall of the flue gas processor together with the centrifugal force of the rotation of the centrifugal filter cartridge, and flow along the inner wall of the flue gas processor into the tar collection tank. At the same time, the sodium carbonate solution will also dissolve and flush the tar attached to the inner wall of the flue gas processor; S5. Electric adsorption: After being filtered by the centrifugal filter cartridge and absorbed by the sodium carbonate solution, the flue gas will pass through the first electrostatic adsorption net and the second electrostatic adsorption net. When the rotating water inlet pipe rotates together with the rotating ventilation pipe, it will drive the friction shoe 2202 to rotate, and generate centrifugal force to push the friction shoe 2202 to the surroundings, causing the friction shoe 2202 to rub against the friction ring. The friction ring on the inside of the first electrostatic adsorption net is made of glass, and the friction shoe is made of polytetrafluoroethylene. After the friction ring made of glass and the friction shoe made of polytetrafluoroethylene rub, the electrons on the glass will be transferred to the polytetrafluoroethylene, thereby making the friction ring positively charged and the friction shoe negatively charged, so that the first electrostatic adsorption net in contact with the friction ring will be negatively charged. Similarly, the second electrostatic adsorption net will be positively charged, thereby forming an electric field between the first electrostatic adsorption net and the second electrostatic adsorption net, which adsorbs extremely tiny solids or tar particles remaining in the flue gas. At the same time, the rotating water inlet pipe will also drive the adsorption net cleaning brush to rotate to clean the first electrostatic adsorption net and the second electrostatic adsorption net to prevent blockage.

[0016] The working principle and beneficial effects of the present invention are: In the present invention, the rising power of high-temperature flue gas is used to drive multiple sets of fans to rotate, and the centrifugal force of the fan's rotation is used to draw low-temperature cold air from the outside to mix and cool the high-temperature flue gas. At the same time, the tar in the flue gas is condensed on the fan, and the tar is thrown out by the rotation of the fan to realize the automatic separation of the tar. Compared with traditional separation equipment and methods, this solution completely utilizes the power of the high-temperature flue gas itself, does not require external power, is more green and environmentally friendly, saves energy and reduces emissions, and has a simpler structure and lower maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic cross-sectional view of the smoke treatment device of the present invention; Figure 2 This is a schematic diagram of the cross-sectional front view of the smoke treatment device of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the centrifugal filter cartridge of the present invention; Figure 4 This is a schematic diagram of the structure of the first cooling fan of the present invention; Figure 5 This is a schematic diagram of the structure of the first electrostatic adsorption network of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0019] In the figure: 1, flue gas processor; 2, flue gas inlet; 3, flue gas outlet; 4, cold air pipe; 5, first rotary joint; 6, rotary ventilation pipe; 7, first cooling fan; 701, cold air channel; 8, second cooling fan; 9, third cooling fan; 10, fourth cooling fan; 11, first conical collector; 12, second conical collector; 13, third conical collector; 14, tar collecting tank; 15, tar outlet pipe; 16, rotary inlet Water pipe; 17. second rotary connector; 18. water inlet pipe; 19. centrifugal filtration mechanism; 1901. conical base; 1902. centrifugal filter cartridge; 1903. annular baffle; 1904. water spray hole; 20. first electrostatic adsorption net; 21. second electrostatic adsorption net; 22. electrostatic generating mechanism; 2201. positioning bracket; 2202. friction shoe; 2203. positioning rod; 2204. friction ring; 23. adsorption net cleaning brush. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1 like Figure 1 to Figure 6As shown, this embodiment proposes an anode baking flue gas treatment device, including a flue gas processor 1, a flue gas inlet 2 is provided at the lower end of the flue gas processor 1, a flue gas outlet 3 is provided at the upper end of the flue gas processor 1, a cold air mixing pipe 4 is penetrated on one side of the flue gas inlet 2, a first rotary joint 5 is rotatably connected to the upper end of the cold air mixing pipe 4, a rotary joint 5 is rotatably connected to a rotary ventilation pipe 6, a first cooling fan 7 is fixedly connected to the rotary ventilation pipe 6, a second cooling fan 8 is provided above the first cooling fan 7, a third cooling fan 9 is provided above the second cooling fan 8, and a fourth cooling fan 10 is provided above the third cooling fan 9. The blades of the first cooling fan 7 are made of aluminum alloy, and the blades of the first cooling fan 7 are hollow, and a cold air channel 701 is arranged inside the blades, and the cold air channel 701 is connected to the rotating ventilation pipe 6. The second cooling fan 8, the third cooling fan 9 and the fourth cooling fan 10 have the same structure as the first cooling fan 7. Therefore, when the first cooling fan 7, the second cooling fan 8, the third cooling fan 9 and the fourth cooling fan 10 rotate, the air in the cold air channel 701 will be thrown to the surroundings by centrifugal force, so that the air pressure in the rotating ventilation pipe 6 is lower than the external atmospheric pressure, and then the rotating ventilation pipe 6 will draw cold air from the outside through the cold air pipe 4.

[0022] A first conical collecting plate 11 is arranged below the fourth cooling fan 10, a second conical collecting plate 12 is arranged below the third cooling fan 9, and a third conical collecting plate 13 is arranged below the second cooling fan 8. The first conical collecting plate 11, the second conical collecting plate 12 and the third conical collecting plate 13 are all fixedly connected to the inner wall of the flue gas processor 1, and a gap for tar to flow through is arranged between the first conical collecting plate 11, the second conical collecting plate 12 and the third conical collecting plate 13 and the inner wall of the flue gas processor 1. The first conical collecting plate 11, the second conical collecting plate 12 and the third conical collecting plate 13 are all in the shape of a truncated cone, and the first conical collecting plate 11, the second conical collecting plate 12 and the third conical collecting plate 13 are all in the shape of a truncated cone. The upper openings of the first conical collecting plate 11, the second conical collecting plate 12 and the third conical collecting plate 13 are all smaller than the lower openings, and the upper opening diameters of the first conical collecting plate 11, the second conical collecting plate 12 and the third conical collecting plate 13 are smaller than the diameters of the second cooling fan 8, the third cooling fan 9 and the fourth cooling fan 10, so that the tar thrown out by the rotation of the second cooling fan 8, the third cooling fan 9 and the fourth cooling fan 10 will fall on the inner wall of the flue gas processor 1 and the outer sides of the first conical collecting plate 11, the second conical collecting plate 12 and the third conical collecting plate 13, and will not fall into the pipe of the flue gas inlet 2 to cause pollution. A tar collecting tank 14 is provided below the first cooling fan 7. The tar collecting tank 14 is provided around the bottom of the flue gas processor 1. The tar collecting tank 14 is annular. The inner diameter of the tar collecting tank 14 is smaller than the diameters of the first cooling fan 7, the second cooling fan 8, the third cooling fan 9 and the fourth cooling fan 10. Therefore, the tar flowing down the inner wall of the flue gas processor 1 and the tar thrown out by the first cooling fan 7 will only fall into the tar collecting tank 14. A tar discharge pipe 15 is provided on one side of the tar collecting tank 14 for discharging the tar in the tar collecting tank 14 in a centralized manner.

[0023] The upper end of the rotating ventilation pipe 6 is fixedly connected to a rotating water inlet pipe 16, and the rotating ventilation pipe 6 and the rotating water inlet pipe 16 are sealed and separated, so that the rotating ventilation pipe 6 and the rotating water inlet pipe 16 can be used to transport cold air and water respectively. The upper end of the rotating water inlet pipe 16 is rotatably connected to a second rotating connector 17, and the upper end of the second rotating connector 17 is rotatably connected to a water inlet pipe 18. A centrifugal filter mechanism 19 is arranged on the water inlet pipe, and the centrifugal filter mechanism 19 includes a conical base 1901, and the conical base 1901 is fixedly connected to a centrifugal filter cartridge 1902 around it, and the centrifugal filter cartridge 1902 is rotatably connected to an annular baffle 1903 around it, and the annular baffle 1903 is fixedly connected to the inner wall of the flue gas processor 1, so that when the flue gas rises, it will be blocked by the annular baffle 1903, and can only pass through the centrifugal filter cartridge 1902, so that the solid particles in the flue gas will be blocked on the outside by the centrifugal filter cartridge 1902, and the solid particles in the flue gas are filtered. The rotating water inlet pipe 16 is located at one end of the inner side of the centrifugal filter cylinder 1902 and is provided with water spray holes 1904 around it for spraying sodium carbonate solution to clean the centrifugal filter cylinder 1902 and absorb harmful gases in the flue gas. The water spray holes 1904 are located higher than the centrifugal filter cylinder 1902, so that most of the sodium carbonate solution will fall on the centrifugal filter cylinder 1902 after being sprayed along the parabola, and the conical base 1901 is low on the sides and high in the middle, so that the sodium carbonate solution in the centrifugal filter cylinder 1902 can flow out to the surroundings. The outflowing sodium carbonate solution will also be thrown onto the inner wall of the flue gas processor 1 by the rotation of the conical base 1901, dissolving and flushing the tar on the inner wall, and then flowing into the tar collection tank 14.

[0024] A first electrostatic adsorption net 20 and a second electrostatic adsorption net 21 are arranged above the centrifugal filtering mechanism 19, and an electrostatic generating mechanism 22 is arranged between the first electrostatic adsorption net 20 and the second electrostatic adsorption net 21 and the rotating water inlet pipe 16, and the electrostatic generating mechanism 22 includes a positioning bracket 2201, and the outer side of the rotating water inlet pipe 16 is fixedly connected with the positioning bracket 2201, and the positioning bracket 2201 is arranged in four groups, and the positioning bracket 2201 is evenly distributed around the rotating water inlet pipe 16, and the outer side of the positioning bracket 2201 is movably connected with a friction shoe 2202, and the inner side of the friction shoe 2202 A positioning rod 2203 is fixedly connected, and the positioning rod 2203 passes through the positioning bracket 2201. The first electrostatic adsorption net 20 and the second electrostatic adsorption net 21 are fixedly installed on the inner wall of the flue gas processor 1, and the first electrostatic adsorption net 20 and the second electrostatic adsorption net 21 are insulated from the inner wall of the flue gas processor 1. The first electrostatic adsorption net 20 and the second electrostatic adsorption net 21 are fixedly connected to the inner side of the first electrostatic adsorption net 20 and the second electrostatic adsorption net 21. The friction ring 2204 on the inner side of the first electrostatic adsorption net 20 is made of glass, and the friction shoe 2202 on the inner side of the first electrostatic adsorption net 20 is made of polytetrafluoroethylene. The friction ring 2204 on the inner side of the second electrostatic adsorption net 21 is made of polytetrafluoroethylene, and the friction tile 2202 on the inner side of the second electrostatic adsorption net 21 is made of glass. When the smoke passes through the first electrostatic adsorption net 20 and the second electrostatic adsorption net 21, the rotating water inlet pipe 16 rotates together with the rotating ventilation pipe 6, which drives the friction tile 2202 to rotate and generates centrifugal force to push the friction tile 2202 to the surroundings, so that the friction tile 2202 and the friction ring 2204 rub against each other. The friction ring 2204 on the inner side of the first electrostatic adsorption net 20 is made of glass, and the friction tile 2202 is made of glass. 2202 is made of polytetrafluoroethylene. After the friction ring 2204 made of glass rubs against the friction shoe 2202 made of polytetrafluoroethylene, the electrons on the glass will be transferred to the polytetrafluoroethylene, thereby making the friction ring 2204 positively charged and the friction shoe 2202 negatively charged, so that the first electrostatic adsorption net 20 in contact with the friction ring 2204 will be negatively charged. Similarly, the second electrostatic adsorption net 21 will be positively charged, thereby forming an electric field between the first electrostatic adsorption net 20 and the second electrostatic adsorption net 21 to adsorb the extremely small solid or tar particles remaining in the flue gas.

[0025] An adsorption net cleaning brush 23 is arranged between the first electrostatic adsorption net 20 and the second electrostatic adsorption net 21. The adsorption net cleaning brush 23 is fixedly installed on the rotating water inlet pipe 16. The adsorption net cleaning brush 23 can rotate with the adsorption net cleaning brush 23 to clean the first electrostatic adsorption net 20 and the second electrostatic adsorption net 21 to prevent blockage.

[0026] Example 2 This embodiment also proposes an anode baking flue gas treatment process, including the following steps: S1. Cooling by mixing with cold air: Place the flue gas processor 1 vertically, with the flue gas inlet 2 facing downward and the flue gas outlet 3 facing upward, and then introduce the flue gas from the 36-chamber anode baking furnace into the flue gas processor 1 through the flue gas inlet 2, and use the power of the rising high-temperature flue gas to drive the first cooling fan 7, the second cooling fan 8, the third cooling fan 9 and the fourth cooling fan 10 to rotate together. When the first cooling fan 7, the second cooling fan 8, the third cooling fan 9 and the fourth cooling fan 10 rotate, the centrifugal force is used to throw the air in the cold air channel 701 of the blade to the surroundings, thereby causing the pressure in the rotating ventilation pipe 6 to decrease, and then the mixing cold air pipe 4 draws low-temperature cold air from the outside and injects it into the flue gas processor 1 through the cold air channel 701 of the blade, and mixes with the high-temperature flue gas to cool down; S2. Tar condensation: When the cold air flows through the cold air channel 701, the aluminum alloy blades are quickly cooled, so that the tar in the smoke is condensed on the outer surfaces of the blades of the first cooling fan 7, the second cooling fan 8, the third cooling fan 9 and the fourth cooling fan 10 to form tar droplets. Then, the centrifugal force of the first cooling fan 7, the second cooling fan 8, the third cooling fan 9 and the fourth cooling fan 10 is used to make the tar flow along the outer surface of the blade to the end of the blade and be thrown out. The diameters of the upper openings of the conical collecting plate 11, the second conical collecting plate 12 and the third conical collecting plate 13 are smaller than the diameters of the first cooling fan 7, the second cooling fan 8, the third cooling fan 9 and the fourth cooling fan 10, so the thrown tar can only fall on the inner wall of the flue gas processor 1 and the outer sides of the first conical collecting plate 11, the second conical collecting plate 12 and the third conical collecting plate 13, and then flow along the inner wall of the flue gas processor 1 to the tar collecting tank 14 for centralized storage and discharge through the tar discharge pipe 15; S3. Centrifugal filtration: When the flue gas continues to rise after being cooled and initially cleaned of tar, it will be blocked by the annular baffle 1903 and can only pass through the centrifugal filter cartridge 1902, so that the solid particles in the flue gas will be blocked on the outside by the centrifugal filter cartridge 1902, thereby achieving filtration of solid particles in the flue gas; S4. Chemical adsorption: Sodium carbonate solution is injected through the water inlet pipe 18, and the sodium carbonate solution is sprayed out through the water spray hole 1904. After being sprayed out through the water spray hole 1904, the sodium carbonate solution will flush the centrifugal filter cartridge 1902 from the inside to the outside, dissolve the tar on the centrifugal filter cartridge 1902, and absorb harmful gases in the flue gas. At the same time, the solid particles and dissolved tar attached to the outside of the centrifugal filter cartridge 1902 are thrown out to the inner wall of the flue gas processor 1 together with the centrifugal force of the rotation of the centrifugal filter cartridge 1902, and flow along the inner wall of the flue gas processor 1 to the tar collection tank 14. At the same time, the sodium carbonate solution will also dissolve and flush the tar attached to the inner wall of the flue gas processor 1; S5. Electrosorption: After being filtered by the centrifugal filter cartridge 1902 and absorbed by the sodium carbonate solution, the smoke passes through the first electrostatic adsorption net 20 and the second electrostatic adsorption net 21. When the rotating water inlet pipe 16 rotates together with the rotating ventilation pipe 6, the friction shoe 2202 is driven to rotate, and the centrifugal force is generated to push the friction shoe 2202 to the surroundings, so that the friction shoe 2202 and the friction ring 2204 rub against each other. The friction ring 2204 on the inner side of the first electrostatic adsorption net 20 is made of glass, and the friction shoe 2202 is made of polytetrafluoroethylene. The friction ring 2204 made of glass and the friction shoe 2202 made of polytetrafluoroethylene rub against each other. 02 After friction, the electrons on the glass will be transferred to the polytetrafluoroethylene, so that the friction ring 2204 will be positively charged and the friction shoe 2202 will be negatively charged, so that the first electrostatic adsorption net 20 in contact with the friction ring 2204 will be negatively charged. Similarly, the second electrostatic adsorption net 21 will be positively charged, thereby forming an electric field between the first electrostatic adsorption net 20 and the second electrostatic adsorption net 21, which adsorbs the extremely small solid or tar particles remaining in the flue gas. At the same time, the rotating water inlet pipe 16 will also drive the adsorption net cleaning brush 23 to rotate, so as to clean the first electrostatic adsorption net 20 and the second electrostatic adsorption net 21 to prevent blockage.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Anode baking flue gas treatment device, characterized in that: The invention comprises a smoke processor (1), wherein a smoke inlet (2) is arranged at the lower end of the smoke processor (1), a smoke outlet (3) is arranged at the upper end of the smoke processor (1), a cold air pipe (4) is passed through one side of the smoke inlet (2), a first rotating joint (5) is rotatably connected to the upper end of the cold air pipe (4), the first rotating joint (5) is rotatably connected to a rotating ventilation pipe (6), a first cooling fan (7) is fixedly connected to the rotating ventilation pipe (6), and the first cooling fan (7) is A second cooling fan (8) is provided on the side, a third cooling fan (9) is provided above the second cooling fan (8), a fourth cooling fan (10) is provided above the third cooling fan (9), a first conical collecting plate (11) is provided below the fourth cooling fan (10), a second conical collecting plate (12) is provided below the third cooling fan (9), a third conical collecting plate (13) is provided below the second cooling fan (8), and a tar collecting tank (14) is provided below the first cooling fan (7); The upper end of the rotating ventilation pipe (6) is fixedly connected to a rotating water inlet pipe (16), the upper end of the rotating water inlet pipe (16) is rotatably connected to a second rotating connector (17), the upper end of the second rotating connector (17) is rotatably connected to a water inlet pipe (18), a centrifugal filtering mechanism (19) is provided on the water inlet pipe, a first electrostatic adsorption net (20) and a second electrostatic adsorption net (21) are provided above the centrifugal filtering mechanism (19), an electrostatic generating mechanism (22) is provided between the first electrostatic adsorption net (20), the second electrostatic adsorption net (21) and the rotating water inlet pipe (16), an adsorption net cleaning brush (23) is provided between the first electrostatic adsorption net (20) and the second electrostatic adsorption net (21), and the adsorption net cleaning brush (23) is fixedly mounted on the rotating water inlet pipe (16).

2. The anode baking flue gas treatment device according to claim 1, characterized in that: The blades of the first cooling fan (7) are made of aluminum alloy and are hollow. A cold air channel (701) is provided inside the blades. The cold air channel (701) is connected to the rotating ventilation pipe (6). The second cooling fan (8), the third cooling fan (9) and the fourth cooling fan (10) have the same structure as the first cooling fan (7).

3. The anode baking flue gas treatment device according to claim 1, characterized in that: The first conical collecting plate (11), the second conical collecting plate (12) and the third conical collecting plate (13) are all fixedly connected to the inner wall of the flue gas processor (1); gaps for tar to flow through are provided between the first conical collecting plate (11), the second conical collecting plate (12) and the third conical collecting plate (13) and the inner wall of the flue gas processor (1); the first conical collecting plate (11), the second conical collecting plate (12) and the third conical collecting plate (13) are all in the shape of a truncated cone; the upper openings of the first conical collecting plate (11), the second conical collecting plate (12) and the third conical collecting plate (13) are all smaller than the lower openings; and the upper opening diameters of the first conical collecting plate (11), the second conical collecting plate (12) and the third conical collecting plate (13) are smaller than the diameters of the first cooling fan (7), the second cooling fan (8), the third cooling fan (9) and the fourth cooling fan (10).

4. The anode baking flue gas treatment device according to claim 1, characterized in that: The tar collection tank (14) is arranged around the bottom of the flue gas treatment device (1), the tar collection tank (14) is annular, the inner diameter of the tar collection tank (14) is smaller than the diameters of the first cooling fan (7), the second cooling fan (8), the third cooling fan (9) and the fourth cooling fan (10), and a tar discharge pipe (15) is arranged on one side of the tar collection tank (14).

5. The anode baking flue gas treatment device according to claim 1, characterized in that: The rotating ventilation pipe (6) is fixedly connected to the rotating water inlet pipe (16), and the rotating ventilation pipe (6) and the rotating water inlet pipe (16) are sealed and isolated.

6. The anode baking flue gas treatment device according to claim 1, characterized in that: The centrifugal filter mechanism (19) comprises a conical base (1901), the conical base (1901) being fixedly connected to a centrifugal filter cartridge (1902) on all sides, the centrifugal filter cartridge (1902) being rotatably connected to an annular baffle (1903) on all sides, and the annular baffle (1903) being fixedly connected to the inner wall of the flue gas processor (1).

7. The anode baking flue gas treatment device according to claim 6, characterized in that: The rotating water inlet pipe (16) is located on the inner side of the centrifugal filter cylinder (1902) and is provided with water spray holes (1904) on all sides. The water spray holes (1904) are located higher than the centrifugal filter cylinder (1902), and the conical base (1901) is low on all sides and high in the middle.

8. The anode baking flue gas treatment device according to claim 1, characterized in that: The static electricity generating mechanism (22) comprises a positioning bracket (2201), the outer side of the rotating water inlet pipe (16) is fixedly connected to the positioning bracket (2201), four groups of the positioning brackets (2201) are arranged, the positioning brackets (2201) are evenly distributed around the rotating water inlet pipe (16), the outer side of the positioning bracket (2201) is movably connected to a friction shoe (2202), the inner side of the friction shoe (2202) is fixedly connected to a positioning rod (2203), and the positioning rod (2203) passes through the positioning bracket (2201); The first electrostatic adsorption net (20) and the second electrostatic adsorption net (21) are both fixedly mounted on the inner wall of the flue gas treatment device (1), and the first electrostatic adsorption net (20) and the second electrostatic adsorption net (21) are both insulatedly connected to the inner wall of the flue gas treatment device (1), and a friction ring (2204) is fixedly connected to the inner side of the first electrostatic adsorption net (20) and the second electrostatic adsorption net (21).

9. The anode baking flue gas treatment device according to claim 8, characterized in that: The friction ring (2204) on the inner side of the first electrostatic adsorption net (20) is made of glass, the friction shoe (2202) on the inner side of the first electrostatic adsorption net (20) is made of polytetrafluoroethylene, the friction ring (2204) on the inner side of the second electrostatic adsorption net (21) is made of polytetrafluoroethylene, and the friction shoe (2202) on the inner side of the second electrostatic adsorption net (21) is made of glass.

10. Anode baking flue gas treatment process, using the anode baking flue gas treatment device according to any one of claims 1 to 9, characterized in that: The following steps are also included: S1. Cooling by mixing with cold air: the flue gas processor (1) is placed vertically, with the flue gas inlet (2) facing downward and the flue gas outlet (3) facing upward. The flue gas from the 36-chamber anode roasting furnace is then introduced into the flue gas processor (1) through the flue gas inlet (2). The rising power of the high-temperature flue gas is used to drive the first cooling fan (7), the second cooling fan (8), the third cooling fan (9) and the fourth cooling fan (10) to rotate together. When the first cooling fan (7), the second cooling fan (8), the third cooling fan (9) and the fourth cooling fan (10) rotate, the centrifugal force is used to throw the air in the cold air channel (701) of the blades to the surroundings, thereby causing the pressure in the rotating ventilation pipe (6) to decrease, thereby allowing the mixing with cold air pipe (4) to draw low-temperature cold air from the outside and inject it into the flue gas processor (1) through the cold air channel (701) of the blades to mix with the high-temperature flue gas for cooling. S2. Tar condensation: When cold air flows through the cold air passage (701), the aluminum alloy blades are rapidly cooled, so that the tar in the flue gas is condensed on the outer surfaces of the blades of the first cooling fan (7), the second cooling fan (8), the third cooling fan (9) and the fourth cooling fan (10) to form tar droplets. Then, the rotating centrifugal force of the first cooling fan (7), the second cooling fan (8), the third cooling fan (9) and the fourth cooling fan (10) is used to make the tar flow along the outer surface of the blade to the end of the blade and be thrown out. The diameter of the upper opening of the first conical collecting plate (11), the second conical collecting plate (12) and the third conical collecting plate (13) is smaller than the diameter of the first cooling fan (7), the second cooling fan (8), the third cooling fan (9) and the fourth cooling fan (10), so that the tar thrown out can only fall on the inner wall of the flue gas treatment device (1) and the outer side of the first conical collecting plate (11), the second conical collecting plate (12) and the third conical collecting plate (13), and then flow along the inner wall of the flue gas treatment device (1) to the tar collection tank (14) for centralized storage and discharged through the tar discharge pipe (15); S3. Centrifugal filtration: When the flue gas continues to rise after being cooled and initially cleaned of tar, it will be blocked by the annular baffle (1903) and can only pass through the centrifugal filter cartridge (1902), so that the solid particles in the flue gas will be blocked on the outside by the centrifugal filter cartridge (1902), thereby achieving filtration of the solid particles in the flue gas; S4. Chemical adsorption: Sodium carbonate solution is injected through the water inlet pipe (18) and sprayed out through the water spray hole (1904). After being sprayed out through the water spray hole (1904), the sodium carbonate solution will flush the centrifugal filter cartridge (1902) from the inside to the outside, dissolving the tar on the centrifugal filter cartridge (1902) and reacting to absorb harmful gases in the flue gas. At the same time, the solid particles and dissolved tar adhering to the outside of the centrifugal filter cartridge (1902) are thrown out to the inner wall of the flue gas treatment device (1) together with the centrifugal force of the rotation of the centrifugal filter cartridge (1902), and flow along the inner wall of the flue gas treatment device (1) into the tar collection tank (14). At the same time, the sodium carbonate solution will also dissolve the tar adhering to the inner wall of the flue gas treatment device (1) and flush it clean; S5. Electrosorption: After being filtered by the centrifugal filter cartridge (1902) and absorbed by the sodium carbonate solution, the smoke passes through the first electrostatic adsorption net (20) and the second electrostatic adsorption net (21). When the rotating water inlet pipe (16) rotates together with the rotating ventilation pipe (6), the friction shoe 2202 is driven to rotate, and centrifugal force is generated to push the friction shoe 2202 in all directions, causing the friction shoe 2202 to rub against the friction ring (2204). The friction ring (2204) on the inner side of the first electrostatic adsorption net (20) is made of glass, and the friction shoe (2202) is made of polytetrafluoroethylene. The friction ring (2204) made of glass and the friction shoe (2204) made of polytetrafluoroethylene are in contact with each other. 2) After friction, the electrons on the glass will be transferred to the polytetrafluoroethylene, thereby making the friction ring (2204) positively charged and the friction shoe (2202) negatively charged, so that the first electrostatic adsorption net (20) in contact with the friction ring (2204) will be negatively charged, and similarly, the second electrostatic adsorption net (21) will be positively charged, thereby forming an electric field between the first electrostatic adsorption net (20) and the second electrostatic adsorption net (21), which adsorbs extremely small solid or tar particles remaining in the flue gas. At the same time, the rotating water inlet pipe (16) will also drive the adsorption net cleaning brush (23) to rotate, thereby cleaning the first electrostatic adsorption net (20) and the second electrostatic adsorption net (21) to prevent clogging.

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