Feeding device for aluminum electrolysis flue gas dry purification system

Abstract

The utility model discloses a feeding device for an aluminum electrolysis flue gas dry-process purification system, relates to the technical field of feeding devices, and aims to solve the problems that a bag-type dust collector in the flue gas dry-process purification system is divided into two sides, the distances between dust collector box bodies on the two sides are different, and fresh aluminum oxide feeding pipes are different in height; the utility model relates to an aluminum oxide purification device, which solves the problems that the feeding of fresh aluminum oxide in a single-side box body unit of a dust remover is not uniform, the adsorption reaction of aluminum oxide flue gas is greatly influenced, and the stability of purified materials and the process of an electrolytic bath is seriously influenced due to the fact that the feeding of the fresh aluminum oxide in the single-side box body unit of the dust remover is not uniform, and the lower end of a stock bin is hermetically connected with a main discharge pipe; the ion fan is in sealed connection with the main discharging pipe through an air inlet pipe, the lower end of the main discharging pipe is in sealed connection with a powder distributor, the lower end of the powder distributor is in sealed connection with a first feeding pipe and a second feeding pipe respectively, and a VRI reactor is installed at the lower end of the first feeding pipe and the lower end of the second feeding pipe in a sealed mode. And a gas collecting mechanism is mounted in the flue gas pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding devices, in particular to a feeding device for a dry purification system of aluminum electrolysis flue gas. Background Technique

[0002] Nowadays, in the aluminum electrolysis industry and steelmaking production process of the metallurgical industry, as well as in the production processes of yellow phosphorus, phosphate fertilizer, and fluoroplastics in the chemical industry, fluorine-containing flue gas will be discharged ultimately. The directly discharged waste gas will cause serious pollution to the environment. However, the dry purification of aluminum electrolysis flue gas adopted in practice is currently the most direct and effective technology. With the popular application of large pre-baked cells, the dry purification system technology has also been widely used and developed. By adopting this method, the operation efficiency and quality of the purification system can be greatly improved, and it is also a very efficient method for dealing with environmental pollution. Dry purification generally uses substances in solid form to absorb and dispose of fluorides in fluorine-containing flue gas, further achieving the effect of purifying waste gas. The feeding device of the dry purification system of aluminum electrolysis flue gas plays a key role in ensuring the purification effect of aluminum electrolysis flue gas. By precisely controlling the feeding amount and evenly distributing alumina powder, the purification efficiency can be effectively improved and environmental pollution can be reduced.

[0003] Chinese Patent Publication No. CN219861616U discloses a feeding device for an electrolytic aluminum flue gas purification system. The feeding device includes a storage bin having a discharge pipe; one end of the discharge pipe is communicated with the flue gas pipe of the purification system; a fluidization plate is arranged in the storage bin and divides the internal space of the storage bin into an upper chamber and a lower chamber arranged up and down; the chamber is communicated with the other end of the discharge pipe; an air inlet assembly is communicated with the lower chamber; the air inlet assembly has a box body communicated with the lower chamber; a plurality of filter meshes are arranged in the box body at intervals; an adsorption and drying layer. This feeding device removes impurities and water in compressed air through the air inlet assembly, avoiding the problem that impurities and moisture are mixed into alumina powder to block the fluidization plate and the discharge pipe, which is beneficial to achieving uniform feeding.

[0004] The above-mentioned existing technical solutions have the following defects: As the core equipment in the flue gas purification of aluminum electrolysis industrial production, the operation stability of the dust collector directly affects the safe operation of production. The bag filter is divided into two sides. The distances between the dust collector boxes on both sides are different, and the heights of the fresh alumina feeding pipes are different, resulting in uneven feeding of fresh alumina in the single-side box unit of the dust collector, which has a greater impact on the adsorption reaction of alumina flue gas and seriously affects the stability of the purification materials and the electrolytic cell process. Therefore, we propose a feeding device for a dry purification system of aluminum electrolysis flue gas to solve the problems raised above. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a feeding device for a dry purification system of aluminum electrolysis flue gas, so as to solve the problem proposed in the above background technology that in the dry purification system of flue gas, the bag filters are divided into two sides, the distances between the dust collector boxes on both sides are different, and the heights of the fresh alumina feeding pipes are different, resulting in uneven feeding of fresh alumina in the single-side box unit of the dust collector, which has a greater impact on the adsorption reaction of alumina flue gas and seriously affects the stability of the purification materials and the electrolytic cell process.

[0006] To achieve the above purpose, the present utility model provides the following technical solution: A feeding device for a dry purification system of aluminum electrolysis flue gas, including a silo, a first bag filter is arranged on one side of the silo, a second bag filter is arranged on one side of the first bag filter, a flue gas pipe is arranged on one side of the first bag filter and the second bag filter, the lower end of the silo is hermetically connected with a total discharge pipe, and a silo valve is hermetically connected between the total discharge pipe and the lower end of the silo. An ion blower is installed on one side of the total discharge pipe, and the ion blower is hermetically connected with the total discharge pipe through an air inlet pipe. The lower end of the total discharge pipe is hermetically connected with a powder distributor, and the lower ends of the powder distributor are respectively hermetically connected with a first feeding pipe and a second feeding pipe. The lower ends of the first feeding pipe and the second feeding pipe are hermetically installed with a VRI reactor, and the VRI reactor extends into the interior of the flue gas pipe. A gas collection mechanism is installed inside the flue gas pipe.

[0007] Preferably, the lower end of the flue gas pipe is hermetically connected with a shunt pipe and a smoke distribution pipe, and the lower end of the smoke distribution pipe is hermetically connected with the air inlet ends of the first bag filter and the second bag filter. A smoke distribution pipe valve is hermetically installed at the lower end of the smoke distribution pipe. A chimney is arranged on one side of the second bag filter. The air outlet end of the first bag filter is hermetically connected with a first outlet pipe, and the air outlet end of the second bag filter is hermetically connected with a second outlet pipe. One side of one end of the first outlet pipe and the second outlet pipe is hermetically connected with a flue gas collector. The lower part of the flue gas collector is hermetically connected with a total outlet pipe, and the lower end of the total outlet pipe is hermetically connected with the lower end of the chimney. An ion blower bracket is arranged at the outer end of the ion blower, and the ion blower bracket is fixedly connected with the ion blower, and the upper end of the ion blower bracket is fixedly connected with the silo. VRI reactor valves are hermetically installed at the joints of the first feeding pipe and the second feeding pipe with the VRI reactor.

[0008] Preferably, an air inlet pipe valve is hermetically installed at one end of the air inlet pipe, a first feeding pipe valve is installed at the upper end of the first feeding pipe, and a second feeding pipe valve is installed at the upper end of the second feeding pipe.

[0009] Preferably, a first gas pipeline is hermetically installed between the first feeding pipe and the flue gas pipe, and a first gas pipeline valve is installed at one end of the first gas pipeline. A second gas pipeline is hermetically installed between the second feeding pipe and the flue gas pipe, and a second gas pipeline valve is installed at one end of the second gas pipeline.

[0010] Preferably, a first powder flowmeter is hermetically installed at the lower end of the first feeding pipe, and a second powder flowmeter is hermetically installed at the lower end of the second feeding pipe. The first powder flowmeter and the second powder flowmeter are located on one side of the VRI reactor. A second powder flowmeter is hermetically installed below the second feeding pipe valve.

[0011] Preferably, the gas collecting mechanism includes a sealing ring, a gas collecting pipe, an electric telescopic cylinder bracket, an electric telescopic cylinder, an air guiding cap and a sealing plug. The gas collecting pipe is located at the lower end of the gas collecting mechanism, and the gas collecting pipe is hermetically connected to the first gas pipeline and the second gas pipeline respectively.

[0012] Preferably, an air guiding cap is arranged at the upper end of the gas collecting mechanism, and a sealing plug is arranged at the lower end of the air guiding cap. Four sealing rings are equidistantly installed at the outer end of the sealing plug, and the sealing plug and the sealing rings are hermetically connected to the inner wall of the gas collecting pipe. An electric telescopic cylinder bracket is fixedly installed inside the upper end of the gas collecting pipe, and an electric telescopic cylinder is fixedly installed at the middle position above the electric telescopic cylinder bracket. The upper end of the electric telescopic cylinder is fixedly connected to the sealing plug. The air guiding cap is in the shape of a water droplet.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, alumina is pumped to the first powder flowmeter or the second powder flowmeter by the drive of a centrifugal fan. The first powder flowmeter and the second powder flowmeter respectively detect the flow rate of alumina in the first feeding pipe and the second feeding pipe. The opening degree of the VRI reactor valve is adjusted according to the flow rate of the powder in the two feeding pipes, so that the flow rate of alumina entering the two VRI reactors is adjusted. The alumina and the flue gas undergo an adsorption reaction. The flue gas after the adsorption reaction is guided by a shunt pipe and distributed into the smoke distribution pipes. By adjusting the opening degree of the valves of multiple smoke distribution pipes, the flue gas enters the box body of each bag filter for gas-solid separation, solving the problem that in the dry flue gas purification system, the bag filters are divided into two sides, the distances between the dust collector boxes on both sides are different, and the heights of the fresh alumina feeding pipes are different, resulting in uneven fresh alumina feeding in the dust collector box unit on one side, which has a great impact on the adsorption reaction of alumina and flue gas, and seriously affects the stability of the purification materials and the electrolytic cell process.

[0015] 2. After long-term use, some alumina will adhere to the inner parts of the first feeding pipe and the second feeding pipe. At this time, extend the electric telescopic cylinder of the gas collecting mechanism. The electric telescopic cylinder drives the air guiding cap and the sealing plug to move upward, thereby releasing the sealing state of the sealing plug on the gas collecting pipe. The flue gas in the flue gas pipe enters the inside of the gas collecting pipe through the guidance of the air guiding cap, and enters the corresponding first gas transmission pipe and the second gas transmission pipe through the guidance of the gas collecting pipe. The flue gas passes through the first gas transmission pipe valve and enters the inside of the first feeding pipe. At the same time, the flue gas is blocked by the first feeding pipe valve and moves towards the VRI reactor, so that the flue gas reacts with the alumina adhered to the inner wall through adsorption. At the same time, the heat and pressure of the flue gas blow off the alumina. After the blowing is completed, contract the electric telescopic cylinder to reset the air guiding cap and the sealing plug to restore the sealing state. At the same time, close the first gas transmission pipe valve and the second gas transmission pipe valve, open the air inlet pipe valve and the ion fan. The ion fan contains an electrode inside. The gas on the electrode is ionized by a high-voltage power supply to form a charged ion cloud. These charged ion clouds include positive ions and negative ions. The positive ions and negative ions will diffuse into the air inlet pipe along with the air flow generated by the electric fan, pass through the air inlet pipe valve and enter the inside of the total discharge pipe, powder distributor, first feeding pipe and second feeding pipe for the first time. When these charged ion clouds come into contact with the electrostatically charged inner wall of the pipe, the positive ions and negative ions will undergo a neutralization reaction with the charges on the object surface, thereby eliminating static electricity and blowing off the alumina adsorbed by static electricity, so as to realize self-cleaning of the inner wall of the pipe and avoid affecting the process stability due to pipe blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present utility model;

[0017] Figure 2 In the present utility model Figure 1 is a partial enlarged view of area A;

[0018] Figure 3 is a connection relationship diagram of the flue gas pipe, VRI reactor and gas collecting mechanism of the present utility model;

[0019] Figure 4 is a structural schematic diagram of the gas collecting mechanism of the present utility model.

[0020] In the figure: 1. Silo; 2. First bag filter; 3. Second bag filter; 4. Flue gas pipe; 5. Total discharge pipe; 6. Powder distributor; 7. First feeding pipe; 8. VRI reactor; 9. First gas transmission pipe; 10. First gas outlet pipe; 11. Second gas outlet pipe; 12. Flue gas collector; 13. Gas collection mechanism; 14. Total gas outlet pipe; 15. Chimney; 16. Ion fan bracket; 17. Ion fan; 18. Inlet pipe; 19. Inlet pipe valve; 20. Silo valve; 21. First feeding pipe valve; 22. First gas transmission pipe valve; 23. Second feeding pipe; 24. Second gas transmission pipe; 25. Second feeding pipe valve; 26. Second gas transmission pipe valve; 27. VRI reactor valve; 28. Sealing ring; 29. Gas collecting pipe; 30. Electric telescopic cylinder bracket; 31. Electric telescopic cylinder; 32. Air guide cap; 33. Sealing plug; 34. Smoke dividing pipe; 35. Smoke dividing pipe valve; 36. First powder flowmeter; 37. Second powder flowmeter. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] Please refer to Figures 1-4 , an embodiment provided by the present invention: A feeding device for a dry purification system of aluminum electrolysis flue gas, including a silo 1, a first bag filter 2 is arranged on one side of the silo 1, a second bag filter 3 is arranged on one side of the first bag filter 2, a flue gas pipe 4 is arranged on one side of the first bag filter 2 and the second bag filter 3, the lower end of the silo 1 is hermetically connected to a total discharge pipe 5, and a silo valve 20 is hermetically connected between the lower end of the total discharge pipe 5 and the lower end of the silo 1. An ion fan 17 is installed on one side of the total discharge pipe 5, and the ion fan 17 is hermetically connected to the total discharge pipe 5 through an inlet pipe 18. The lower end of the total discharge pipe 5 is hermetically connected to a powder distributor 6, and the lower ends of the powder distributor 6 are respectively hermetically connected to a first feeding pipe 7 and a second feeding pipe 23. The lower ends of the first feeding pipe 7 and the second feeding pipe 23 are hermetically installed with a VRI reactor 8, and the VRI reactor 8 extends into the interior of the flue gas pipe 4. A gas collection mechanism 13 is installed inside the flue gas pipe 4.

[0023] After long-term use, some alumina will adhere to the inner parts of the first feeding pipe 7 and the second feeding pipe 23. At this time, extend the electric telescopic cylinder 31 of the air collecting mechanism 13. The electric telescopic cylinder 31 drives the air guiding cap 32 and the sealing plug 33 to move upward, thereby releasing the sealing state of the sealing plug 33 on the gas collecting pipe 29. The flue gas in the flue gas pipe 4 enters the inside of the gas collecting pipe 29 through the guidance of the air guiding cap 32, and enters the corresponding first gas transmission pipe 9 and the second gas transmission pipe 24 through the guidance of the gas collecting pipe 29. The flue gas passes through the first gas transmission pipe valve 22 and enters the inside of the first feeding pipe 7. At the same time, the flue gas is blocked by the first feeding pipe valve 21 from moving towards the VRI reactor 8, so that the flue gas undergoes an adsorption reaction with the alumina adhering to the inner wall. At the same time, the heat and pressure of the flue gas blow off the alumina. After the blowing is completed, contract the electric telescopic cylinder 31 to reset the air guiding cap 32 and the sealing plug 33 to restore the sealing state. At the same time, close the first gas transmission pipe valve 22 and the second gas transmission pipe valve 26, open the air inlet pipe valve 19 and the ion fan 17. The ion fan 17 contains an electrode inside. The gas on the electrode is ionized by a high-voltage power supply to form a charged ion cloud. These charged ion clouds include positive ions and negative ions. The positive ions and negative ions will diffuse into the air inlet pipe 18 along with the air flow generated by the electric fan, pass through the air inlet pipe valve 19 and enter the inside of the primary total discharge pipe 5, the powder distributor 6, the first feeding pipe 7 and the second feeding pipe 23. When these charged ion clouds come into contact with the electrostatically charged inner wall of the pipeline, the positive ions and negative ions will undergo a neutralization reaction with the charges on the surface of the object, thereby eliminating static electricity and blowing off the alumina adsorbed by static electricity.

[0024] Please refer to Figure 1 , the lower end of the flue gas pipe 4 is hermetically connected to the smoke distributing pipe 34 through a shunt pipe, and the lower end of the smoke distributing pipe 34 is hermetically connected to the air inlet ends of the first bag filter 2 and the second bag filter 3. A smoke distributing pipe valve 35 is hermetically installed at the lower end of the smoke distributing pipe 34. A chimney 15 is arranged on one side of the second bag filter 3. The air outlet end of the first bag filter 2 is hermetically connected to a first air outlet pipe 10. The air outlet end of the second bag filter 3 is hermetically connected to a second air outlet pipe 11. One side of one end of the first air outlet pipe 10 and the second air outlet pipe 11 is hermetically connected to a flue gas collector 12. The lower part of the flue gas collector 12 is hermetically connected to a total air outlet pipe 14, and the lower end of the total air outlet pipe 14 is hermetically connected to the lower end of the chimney 15. An ion fan bracket 16 is arranged at the outer end of the ion fan 17, and the ion fan bracket 16 is fixedly connected to the ion fan 17, and the upper end of the ion fan bracket 16 is fixedly connected to the silo 1. VRI reactor valves 27 are hermetically installed at the joints of the first feeding pipe 7 and the second feeding pipe 23 with the VRI reactor 8.

[0025] Please refer to Figure 2, one end of the intake pipe 18 is sealed and installed with an intake pipe valve 19, the upper end of the first feeding pipe 7 is installed with a first feeding pipe valve 21, and the upper end of the second feeding pipe 23 is installed with a second feeding pipe valve 25.

[0026] Please refer to Figures 1-2 , a first gas transmission pipe 9 is sealed and installed between the first feeding pipe 7 and the flue gas pipe 4, and one end of the first gas transmission pipe 9 is installed with a first gas transmission pipe valve 22. A second gas transmission pipe 24 is sealed and installed between the second feeding pipe 23 and the flue gas pipe 4, and one end of the second gas transmission pipe 24 is installed with a second gas transmission pipe valve 26.

[0027] Please refer to Figures 1-2 , the lower end of the first feeding pipe 7 is sealed and installed with a first powder flowmeter 36, the lower end of the second feeding pipe 23 is sealed and installed with a second powder flowmeter 37, and the first powder flowmeter 36 and the second powder flowmeter 37 are located on one side of the VRI reactor 8. A second powder flowmeter 37 is sealed and installed below the second feeding pipe valve 25. One side of the first powder flowmeter 36 and the second powder flowmeter 37 is sealed and connected to a centrifugal fan.

[0028] Please refer to Figure 4 , the gas collecting mechanism 13 includes a sealing ring 28, a gas collecting pipe 29, an electric telescopic cylinder bracket 30, an electric telescopic cylinder 31, an air guiding cap 32 and a sealing plug 33. The gas collecting pipe 29 is located at the lower end of the gas collecting mechanism 13, and the gas collecting pipe 29 is respectively and hermetically connected to the first gas transmission pipe 9 and the second gas transmission pipe 24.

[0029] Please refer to Figure 4 , the upper end of the gas collecting mechanism 13 is provided with an air guiding cap 32, and a sealing plug 33 is arranged at the lower end of the air guiding cap 32. Four sealing rings 28 are equidistantly installed at the outer end of the sealing plug 33, and the sealing plug 33 and the sealing rings 28 are hermetically connected to the inner wall of the gas collecting pipe 29. An electric telescopic cylinder bracket 30 is fixedly installed inside the upper end of the gas collecting pipe 29, and an electric telescopic cylinder 31 is fixedly installed at the middle position above the electric telescopic cylinder bracket 30. The upper end of the electric telescopic cylinder 31 is fixedly connected to the sealing plug 33, and the air guiding cap 32 is in the shape of a water droplet.

[0030] Working principle: During use, the flue gas enters through the flue gas pipe 4. Open the bin valve 20 at the lower end of the bin 1 to allow the alumina in the bin 1 to enter the total discharge pipe 5 under gravity. Through the setting of the powder distributor 6, the alumina is divided and flows into the first feeding pipe 7 and the second feeding pipe 23. Driven by the centrifugal fan, the alumina is pumped to the first powder flowmeter 36 or the second powder flowmeter 37. The first powder flowmeter 36 and the second powder flowmeter 37 respectively detect the flow rate of the alumina in the first feeding pipe 7 and the second feeding pipe 23. The opening degree of the VRI reactor valve 27 is adjusted according to the powder flow rates in the two feeding pipes, so that the flow rate of the alumina entering the two VRI reactors 8 is adjusted. The alumina reacts with the flue gas by adsorption. The flue gas after the adsorption reaction is guided by the shunt pipe and distributed into the smoke distribution pipes 34. By adjusting the opening degrees of the multiple smoke distribution pipe valves 35, the flue gas is allowed to enter the box body of each bag filter for gas-solid separation. The gas after dust removal is discharged through the first gas outlet pipe 10 and the second gas outlet pipe 11, and is guided and collected into the total gas outlet pipe 14 by the flue gas collector 12, and finally discharged from the chimney 15. After long-term use, some alumina will adhere to the inner parts of the first feeding pipe 7 and the second feeding pipe 23. At this time, extend the electric telescopic cylinder 31 of the gas collection mechanism 13. The electric telescopic cylinder 31 drives the air guide cap 32 and the sealing plug 33 to move upward, thereby releasing the sealing state of the sealing plug 33 on the gas collection pipe 29. The flue gas in the flue gas pipe 4 enters the interior of the gas collection pipe 29 through the guidance of the air guide cap 32, and enters the corresponding first gas transmission pipe 9 and the second gas transmission pipe 24 through the guidance of the gas collection pipe 29. The flue gas passes through the first gas transmission pipe valve 22 and enters the interior of the first feeding pipe 7. At the same time, the flue gas is blocked by the first feeding pipe valve 21 from moving towards the VRI reactor 8, so that the flue gas reacts with the alumina adhering to the inner wall by adsorption. At the same time, the heat and pressure of the flue gas blow off the alumina. After the blowing is completed, contract the electric telescopic cylinder 31 to reset the air guide cap 32 and the sealing plug 33 to restore the sealing state. At the same time, close the first gas transmission pipe valve 22 and the second gas transmission pipe valve 26, open the intake pipe valve 19 and the ion fan 17. The ion fan 17 contains an electrode inside. The gas on the electrode is ionized by a high-voltage power supply to form a charged ion cloud. These charged ion clouds include positive ions and negative ions. The positive ions and negative ions will diffuse into the intake pipe 18 along with the air flow generated by the electric fan, pass through the intake pipe valve 19 and enter the interior of the total discharge pipe 5, the powder distributor 6, the first feeding pipe 7 and the second feeding pipe 23 for the first time. When these charged ion clouds come into contact with the electrostatically charged inner wall of the pipeline, the positive ions and negative ions will undergo a neutralization reaction with the charges on the surface of the object, thereby eliminating static electricity and blowing off the alumina adsorbed by static electricity.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A feeding device for an aluminum electrolysis flue gas dry purification system, comprising a feed bin (1), characterized in that: A first bag dust collector (2) is arranged on one side of the silo (1), a second bag dust collector (3) is arranged on one side of the first bag dust collector (2), a smoke pipe (4) is arranged on one side of the first bag dust collector (2) and the second bag dust collector (3), a main discharge pipe (5) is sealedly connected to the lower end of the silo (1), and a silo valve (20) is sealedly connected between the main discharge pipe (5) and the lower end of the silo (1), an ion blower (17) is installed on one side of the main discharge pipe (5), and the ion blower ( 17) is sealedly connected to the main discharge pipe (5) through an air inlet pipe (18); the lower end of the main discharge pipe (5) is sealedly connected to a powder distributor (6); the lower ends of the powder distributor (6) are respectively sealedly connected to a first feeding pipe (7) and a second feeding pipe (23); the lower ends of the first feeding pipe (7) and the second feeding pipe (23) are sealedly installed with a VRI reactor (8), and the VRI reactor (8) extends to the interior of the flue gas pipe (4); and the interior of the flue gas pipe (4) is installed with a gas collecting mechanism (13).

2. The feeding device for aluminum electrolysis fume dry purification system according to claim 1 is characterized in that: The lower end of the smoke pipe (4) is sealedly connected to the smoke distribution pipe (34) through a shunt pipe, and the lower end of the smoke distribution pipe (34) is sealedly connected to the air inlet ends of the first bag dust collector (2) and the second bag dust collector (3). A smoke distribution pipe valve (35) is sealedly installed at the lower end of the smoke distribution pipe (34). A chimney (15) is provided on one side of the second bag dust collector (3). The air outlet end of the first bag dust collector (2) is sealedly connected to the first air outlet pipe (10), and the air outlet end of the second bag dust collector (3) is sealedly connected to the second air outlet pipe (11). The first air outlet pipe (10) and the second air outlet pipe (11) are sealedly connected to each other. ) is sealedly connected to one side of one end thereof with a flue gas collector (12), a main gas outlet pipe (14) is sealedly connected to the lower side of the flue gas collector (12), and the lower end of the main gas outlet pipe (14) is sealedly connected to the lower end of the chimney (15), an ion fan bracket (16) is provided at the outer end of the ion fan (17), and the ion fan bracket (16) is fixedly connected to the ion fan (17), and the upper end of the ion fan bracket (16) is fixedly connected to the silo (1), and a VRI reactor valve (27) is sealedly installed at the connection between the first feeding pipe (7) and the second feeding pipe (23) and the VRI reactor (8).

3. The feeding device for aluminum electrolysis fume dry purification system according to claim 1, characterized in that: An air intake pipe valve (19) is installed in a sealed manner at one end of the air intake pipe (18), a first feeding pipe valve (21) is installed at the upper end of the first feeding pipe (7), and a second feeding pipe valve (25) is installed at the upper end of the second feeding pipe (23).

4. The feeding device for aluminum electrolysis fume dry purification system according to claim 1, characterized in that: A first gas pipe (9) is installed in a sealed manner between the first feeding pipe (7) and the smoke pipe (4), and a first gas pipe valve (22) is installed at one end of the first gas pipe (9); a second gas pipe (24) is installed in a sealed manner between the second feeding pipe (23) and the smoke pipe (4), and a second gas pipe valve (26) is installed at one end of the second gas pipe (24).

5. The feeding device for aluminum electrolysis fume dry purification system according to claim 3 is characterized in that: A first powder flowmeter (36) is sealed and installed at the lower end of the first feeding pipe (7), and a second powder flowmeter (37) is sealed and installed at the lower end of the second feeding pipe (23), and the first powder flowmeter (36) and the second powder flowmeter (37) are located on one side of the VRI reactor (8), and the second powder flowmeter (37) is sealed and installed below the valve (25) of the second feeding pipe.

6. The feeding device for aluminum electrolysis fume dry purification system according to claim 1, characterized in that: The gas collecting mechanism (13) comprises a sealing ring (28), a gas collecting pipe (29), an electric telescopic cylinder bracket (30), an electric telescopic cylinder (31), an air induction cap (32) and a sealing plug (33); the gas collecting pipe (29) is located at the lower end of the gas collecting mechanism (13), and the gas collecting pipe (29) is respectively sealedly connected to the first gas delivery pipe (9) and the second gas delivery pipe (24).

7. The feeding device for aluminum electrolysis fume dry purification system according to claim 1, characterized in that: An air bleed cap (32) is provided at the upper end of the air collecting mechanism (13), and a sealing plug (33) is provided at the lower end of the air bleed cap (32), and four sealing rings (28) are equidistantly installed at the outer end of the sealing plug (33), and the sealing plug (33) and the sealing ring (28) are sealedly connected to the inner wall of the air collecting pipe (29), an electric telescopic cylinder bracket (30) is fixedly installed inside the upper end of the air collecting pipe (29), and an electric telescopic cylinder (31) is fixedly installed at the middle position above the electric telescopic cylinder bracket (30), the upper end of the electric telescopic cylinder (31) is fixedly connected to the sealing plug (33), and the air bleed cap (32) is in a water drop shape.

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