A gas absorption device for an intermediate link in the production of aluminum ingots and a method of absorption

Abstract

This invention relates to the field of aluminum ingot preparation technology, specifically to a gas absorption device and method for the intermediate stage of aluminum ingot preparation, comprising: a base, on which a support is fixed, and on which a dust collection tank is fixed; a spray tank, fixedly installed on the base, with a conveying pipe connected to the dust collection tank and a spray absorption mechanism connected to the conveying pipe inside the spray tank; further comprising: a dust collection pipe, fixedly installed at the bottom of the dust collection tank, with a dust collection mechanism connected to the dust collection pipe inside the dust collection tank; a filter plate, movably installed inside the conveying pipe, for filtering the gas entering the conveying pipe; a holding box, fixedly installed on the dust collection tank and symmetrically arranged, with an elastic component connected to the receiving component and the filter plate inside the holding box; and a pushing mechanism, disposed inside the holding box and connected to the elastic component.

Description

[0001] Citation of relevant applications

[0002] This application claims the full benefits of the invention patent application No. 202310932938.6, filed on July 27, 2023 with the State Intellectual Property Office of the People's Republic of China, entitled "A Gas Absorption Device and Absorption Method for the Intermediate Stage of Aluminum Ingot Preparation", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to the field of aluminum ingot preparation technology, specifically to a gas absorption device and method for the intermediate stage of aluminum ingot preparation. Background Technology

[0004] The production of aluminum ingots consists of several stages, including bauxite mining, alumina production, and aluminum electrolysis. First, bauxite is mined, then washed and ground to produce aluminum ore powder. Alumina is then obtained through four complex processes, including roasting. There are three main types of bauxite used to produce alumina: gibbsite, boehmite, and diaspore.

[0005] During aluminum smelting, cryolite-containing covering agents and slagging agents are used to ensure smelting quality. However, at high temperatures, cryolite reacts chemically with moisture in the atmosphere and aluminum material to produce hydrogen fluoride gas, a colorless gas with a pungent odor that poses a significant hazard to human health and the atmospheric environment.

[0006] Therefore, it is necessary to absorb and treat fluorine-containing gases. Existing treatment methods mainly include dry and wet scrubbing. The principle of dry scrubbing is to pass the gas containing hydrogen fluoride through a solid alkaline substance, causing a neutralization reaction between the two to produce harmless salts. However, in actual treatment, due to reasons such as the alkaline substance used in the filter not being replaced in time, the gas cannot be completely neutralized into harmless alkaline substances. The principle of wet scrubbing is to pass the waste gas containing hydrogen fluoride into a sodium hydroxide solution, where it is neutralized to produce harmless sodium fluoride. However, due to the limited contact area between the solution and the waste gas, the absorption effect of hydrogen fluoride is not good. Summary of the Invention

[0007] The purpose of this invention is to provide a gas absorption device and method for the intermediate stage of aluminum ingot preparation, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A gas absorption device for intermediate steps in aluminum ingot preparation, comprising:

[0010] A base, on which a bracket is fixedly installed, and on which a dust collection bucket is fixed;

[0011] A spray tank is fixedly installed on the base. A conveying pipe connected to the dust collection tank is connected to the spray tank. A spray absorption mechanism connected to the conveying pipe is provided inside the spray tank. The spray absorption mechanism can operate when the gas in the dust collection tank is conveyed to the conveying pipe.

[0012] The gas absorption device used in the intermediate stage of aluminum ingot preparation also includes:

[0013] A dust collection pipe is fixedly installed at the bottom of the dust collection bucket. The dust collection bucket is equipped with a dust collection mechanism connected to the dust collection pipe. The dust collection mechanism can adjust the dust collection pipe to be in a conductive or blocked state according to the dust collection status.

[0014] A filter plate is movably installed inside the conveying pipe. The filter plate is used to filter the gas entering the conveying pipe. A receiving component connected to the filter plate is provided inside the conveying pipe. The receiving component is used to limit the position of the filter plate.

[0015] A holding box is fixedly installed on the dust collection bucket and arranged symmetrically. One of the holding boxes is used to hold the unused filter plates, and the other holding box is used to hold the used filter plates. The holding box is provided with an elastic component connected to the receiving component and the filter plate. The elastic component can move after the filter plate is blocked and push the filter plate into one of the holding boxes.

[0016] A pushing mechanism is disposed inside the holding box and connected to the elastic component. The pushing mechanism is able to operate when the elastic component moves and push the filter plate inside the holding box into the conveying pipe.

[0017] As a further aspect of the present invention: the spray absorption mechanism includes a plurality of through holes formed on the conveying pipe and arranged equidistantly around the circumference, a limiting sleeve is movably installed on the conveying pipe, a float plate is fixed to one end of the limiting sleeve facing the bottom of the spray tank, and a pumping assembly is provided on the spray tank.

[0018] As a further embodiment of the present invention: the pump assembly includes a water pump fixedly installed on the spray tank, a conduit passing through the spray tank is fixed on the water pump, and a nozzle is fixed at the end of the conduit away from the water pump.

[0019] As a further embodiment of the present invention: the dust collection mechanism includes a slot formed at the bottom of the dust collection tube, and a groove connected to the slot is also formed at the bottom of the dust collection tube. A dust collection cup is movably installed inside the dust collection tube. A symmetrically arranged limiting block is fixed on the outer wall of the dust collection cup. The limiting block engages with the groove and the slot. A sealing component connected to the dust collection cup is provided on the dust collection tube.

[0020] As a further embodiment of the present invention: the sealing assembly includes a guide ring fixedly installed inside the dust collection pipe, a movable rod movably installed on the guide ring, a piston fixed at the end of the movable rod away from the dust collection pipe, and the piston cooperating with the guide ring;

[0021] The sealing assembly further includes a fixing ring fixedly installed at the end of the movable rod away from the piston. A first spring is sleeved on the movable rod, which abuts against the guide ring and the fixing ring respectively. The fixing ring abuts against the dust collection cup.

[0022] As a further embodiment of the present invention: the receiving component includes a limiting ring fixedly installed on the conveying pipe and arranged symmetrically, the conveying pipe having a first through groove communicating with one of the holding boxes, and the conveying pipe also having a second through groove communicating with the other holding box, the limiting ring abutting against the filter plate.

[0023] As a further embodiment of the present invention: the elastic component includes a support rod movably installed in one of the holding boxes and passing through the holding box, an inclined block passing through the conveying pipe is fixed to one end of the support rod facing the conveying pipe, a second spring is sleeved on the support rod and abuts against the inclined block, the support rod is connected to the pushing mechanism, and the inclined block cooperates with the filter plate.

[0024] As a further embodiment of the present invention: the pushing mechanism includes a receiving rod fixedly installed on the end of the support rod away from the inclined block, a rotating sleeve rotatably installed on the container, a first spiral groove being formed on the outer wall of the rotating sleeve, a driven component connected to the rotating sleeve being provided on the container, the receiving rod engaging with the first spiral groove, and the driven component cooperating with the filter plate.

[0025] As a further embodiment of the present invention: the driven component includes a second spiral groove formed in the rotating sleeve, a push rod movably installed in the rotating sleeve that passes through the container, a protrusion fixed on the push rod that engages with the second spiral groove, a limit rod fixed on the container, a limit groove formed on the push rod that engages with the limit rod, and the push rod cooperating with the filter plate.

[0026] A gas absorption method for an intermediate gas absorption device in aluminum ingot preparation includes the following steps:

[0027] Step 1: Pass the gas to be treated into the dust collection bin, and under the action of the dust collection bin, the dust mixed in the gas is separated from the gas and gradually falls into the dust collection pipe under the action of gravity.

[0028] Step 2: Under the action of the dust collection mechanism, the dust collection pipe is in a conductive state, and dust will fall into the dust collection mechanism. When the dust reaches a certain amount, the dust collection mechanism needs to be cleaned. During the cleaning process, the dust collection mechanism will block the dust collection pipe to ensure that the gas in the dust collection bucket does not overflow.

[0029] Step 3: The gas in the dust collector will enter the conveying pipe and be filtered again by the filter plate to remove residual impurities in the gas.

[0030] Step 4: As the filter plate is used for a long time, the filter holes of the filter plate will become clogged, which will increase the air pressure in the delivery pipe and push the filter plate to move in the delivery pipe. When the filter plate comes into contact with the elastic component, it drives the elastic component to move and drives the pushing mechanism to move, so that the filter plate enters one of the holding boxes. Under the action of the pushing mechanism, another new filter plate enters the delivery pipe.

[0031] Step 5: The gas passing through the filter plate will enter the spray tank, and under the action of the spray mechanism, the fluoride contained in the gas will be absorbed.

[0032] Compared with the prior art, the beneficial effects of this invention are as follows: When treating fluorine-containing waste gas, the gas is introduced into a dust collector. Under the action of centrifugal force, particulate matter is separated from the airflow and collected on the wall of the container. Under the action of gravity, the particulate matter will fall into the dust collection pipe and be collected in the dust removal mechanism. After preliminary screening, the gas will enter the conveying pipe and be further filtered by the filter plate. As the filter plate removes more impurities, the filter holes on the filter plate will gradually become blocked, increasing the air pressure in the conveying pipe. This causes the filter plate to move in the conveying pipe. The filter plate also drives the elastic component to move and drives the pushing mechanism to move. Under the action of the elastic component, the filter plate enters one of the holding boxes, and under the action of the pushing mechanism, a new filter plate enters the conveying pipe, thus ensuring that the filtration effect of the gas is always maintained at a good level. The filtered gas will be conveyed to the spray tank, where the hydrogen fluoride contained in the gas is absorbed and treated by the spray absorption mechanism, thereby achieving the effect of treating fluorine-containing waste gas. Attached Figure Description

[0033] Figure 1A schematic diagram of one embodiment of a gas absorption device for the intermediate stage of aluminum ingot preparation.

[0034] Figure 2 A schematic diagram of the structure of a gas absorption device for the intermediate stage of aluminum ingot preparation from another angle in one embodiment.

[0035] Figure 3 A half-section schematic diagram of a gas absorption device for intermediate stages in aluminum ingot preparation.

[0036] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0037] Figure 5 An exploded structural diagram of the dust accumulation mechanism in one embodiment of a gas absorption device for intermediate stages of aluminum ingot preparation.

[0038] Figure 6 A partial cross-sectional schematic diagram of one embodiment of a gas absorption device for intermediate stages in aluminum ingot preparation.

[0039] Figure 7 A schematic diagram of the conveying pipe and part of the pushing mechanism in one embodiment of the gas absorption device for the intermediate stage of aluminum ingot preparation.

[0040] Figure 8 A schematic diagram showing the connection relationship between the elastic component and part of the pushing mechanism in one embodiment of a gas absorption device for the intermediate stage of aluminum ingot preparation.

[0041] Figure 9 An exploded structural diagram of the elastic component and pushing mechanism in one embodiment of a gas absorption device for the intermediate stage of aluminum ingot preparation.

[0042] Figure 10 A half-sectional schematic diagram of the conveying pipe, elastic component, and pushing mechanism in one embodiment of a gas absorption device for intermediate stages of aluminum ingot preparation.

[0043] Figure 11 An exploded structural diagram of a portion of the spraying mechanism in one embodiment of a gas absorption device for intermediate stages of aluminum ingot preparation.

[0044] In the diagram: 1. Base; 2. Bracket; 3. Dust collection bucket; 4. Dust collection pipe; 5. Guide ring; 6. Movable rod; 7. Piston; 8. Fixed ring; 9. Spring No. 1; 10. Slot; 11. Groove; 12. Dust collection cup; 13. Limiting block; 14. Conveying pipe; 15. Through groove No. 1; 16. Through groove No. 2; 17. Limiting ring; 18. Container box; 19. Support rod; 20. Spring No. 2; 21. Inclined block; 22. Receiving rod; 23. Rotating sleeve; 24. Spiral groove No. 1; 25. Push rod; 26. Protrusion; 27. Spiral groove No. 2; 28. Spray bucket; 29. ​​Through hole; 30. Limiting sleeve; 31. Float plate; 32. Water pump; 33. Conduit; 34. Spray head. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0047] Please see Figures 1 to 11In this embodiment of the invention, a gas absorption device for the intermediate stage of aluminum ingot preparation includes: a base 1, a support 2, a dust collection bucket 3, a spray bucket 28, a dust collection pipe 4, a conveying pipe 14, a filter plate, a holding box 18, a spray absorption mechanism, a dust collection mechanism, a receiving component, an elastic component, and a pushing mechanism. During the aluminum ingot preparation process, recycled aluminum and atmospheric moisture react chemically with cryolite-containing covering agents and slagging agents, producing hydrogen fluoride gas, which is harmful to human health and the atmospheric environment. To ensure human health and environmental protection requirements, this waste gas needs to be absorbed and treated. During treatment, particulate matter mixed with the gas also needs to be removed. The gas is passed into the dust collection bucket 2, where centrifugal force causes the particulate matter to separate from the airflow and be collected on the container wall. Under gravity, the particulate matter falls into the dust collection pipe 4 and is collected in the dust collection bucket. Inside the mechanism, the gas, after initial screening, enters the conveying pipe 14 and is further filtered by the filter plate. As the filter plate removes more impurities, the filter holes on the filter plate are gradually blocked, increasing the gas pressure inside the conveying pipe 14. This causes the filter plate to move within the conveying pipe 14. The filter plate also drives the elastic component to move, which in turn drives the pushing mechanism. Under the action of the elastic component, the filter plate enters one of the holding boxes 18, and under the action of the pushing mechanism, a new filter plate enters the conveying pipe 14, thus ensuring that the filtration effect of the gas is always maintained at a good level. The filtered gas is then conveyed to the spray tank 28, where the hydrogen fluoride contained in the gas is absorbed and treated by the spray absorption mechanism, thereby achieving the effect of treating fluorine-containing waste gas.

[0048] Specifically, the following are included:

[0049] A base 1, on which a bracket 2 is fixedly installed, and on which a dust collection bucket 3 is fixedly installed;

[0050] Please see Figures 1-3 , Figure 11 A spray tank 28 is fixedly installed on the base 1. A conveying pipe 14 connected to the spray tank 28 is connected to the dust collection tank 3. A spray absorption mechanism connected to the conveying pipe 14 is provided inside the spray tank 28. The spray absorption mechanism can operate when the gas in the dust collection tank 3 is conveyed to the conveying pipe 14. The spray absorption mechanism includes a plurality of through holes 29 opened on the conveying pipe 14 and arranged circumferentially. A limiting sleeve 30 is movably installed on the conveying pipe 14. A float plate 31 is fixed to one end of the limiting sleeve 30 facing the bottom of the spray tank 28. A pump assembly is provided on the spray tank 28. The pump assembly includes a water pump 32 fixedly installed on the spray tank 28. A conduit 33 penetrating the spray tank 28 is fixed on the water pump 32. A nozzle 34 is fixed to one end of the conduit 33 away from the water pump 32.

[0051] In detail, aluminum ingots are generally produced by smelting to extract aluminum metal. During the smelting process, a covering agent containing cryolite (Na3AIF6) and a slagging agent (a mixture of NaI, KCl, CaCl, and AlCl3) are used to ensure the quality of the smelting. Cryolite is used at 400℃~ At a high temperature of 600℃, hydrogen fluoride reacts chemically with moisture in the atmosphere and aluminum materials to produce hydrogen fluoride gas. This is a colorless gas with a pungent odor and is highly toxic, posing a significant threat to human health and the atmospheric environment. Therefore, hydrogen fluoride gas needs to be absorbed and treated. Existing treatment methods mainly include dry decontamination and wet decontamination. The principle of dry decontamination is to pass the hydrogen fluoride-containing gas through a solid alkaline substance, causing a neutralization reaction between the two to produce harmless salts. However, in actual treatment, due to reasons such as the alkaline substance used in the filter not being replaced in a timely manner, the gas cannot completely neutralize the waste gas into harmless alkaline substances. The principle of wet decontamination is to pass the hydrogen fluoride-containing waste gas into a sodium hydroxide solution, where it neutralizes with the solution to produce harmless sodium fluoride.

[0052] Preferably, in the initial state, the sodium hydroxide solution required for absorbing hydrogen fluoride is added into the spray tank 28. Under the action of buoyancy, the float 31 is positioned above the liquid surface, thereby driving the limiting sleeve 30 to move. This ensures that the through hole 29 below the liquid level is open, while the through hole 29 above the liquid level is blocked. When the conveying pipe 14 conveys gas containing hydrogen fluoride, the gas will be discharged through the open through hole 29. At this time, the hydrogen fluoride gas will react with the sodium hydroxide to generate sodium fluoride. To ensure that the discharged gas does not contain hydrogen fluoride, the gas after overflowing the solution needs to be treated. During the spray absorption process, the water pump 32 operates and transports the solution in the spray tank 28 to the nozzle 34 through the conduit 33, where it is sprayed out to treat the overflowing gas. Because the sprayed solution has a larger contact area with the gas, the absorption effect of hydrogen fluoride gas is better. When the sodium hydroxide solution needs to be replaced, the liquid level will gradually decrease as the sodium hydroxide solution is discharged, causing the float 31 to gradually descend and, under the action of the limiting sleeve 30, to seal the through hole 29, thereby ensuring that the gas will not overflow before treatment.

[0053] The gas absorption device for the intermediate stage of aluminum ingot preparation also includes:

[0054] Please see Figures 1-3 , Figure 5 , Figure 6A dust collection pipe 4 is fixedly installed at the bottom of the dust collection bin 3. A dust collection mechanism connected to the dust collection pipe 4 is provided inside the dust collection bin 3. The dust collection mechanism can adjust the dust collection pipe 4 to be in a conductive or blocked state according to the dust collection status. The dust collection mechanism includes a slot 10 formed at the bottom of the dust collection pipe 4, and a groove 11 connected to the slot 10 at the bottom of the dust collection pipe 4. A dust collection cup 12 is movably installed inside the dust collection pipe 4. Symmetrically arranged limiting blocks 13 are fixed on the outer wall of the dust collection cup 12. The limiting blocks 13 engage with the groove 11 and the slot 10. The dust collection pipe 4 is provided with a sealing assembly connected to the dust collection cup 12. The sealing assembly includes a guide ring 5 fixedly installed inside the dust collection pipe 4, a movable rod 6 movably installed on the guide ring 5, and a piston 7 fixed at the end of the movable rod 6 away from the dust collection pipe 4. The piston 7 cooperates with the guide ring 5. The sealing assembly also includes a fixing ring 8 fixedly installed at the end of the movable rod 6 away from the piston 7. A first spring 9 is sleeved on the movable rod 6, which abuts against the guide ring 5 and the fixing ring 8 respectively. The fixing ring 8 abuts against the dust collection cup 12.

[0055] It should be noted that the dust collection cup 12 is used to collect particulate matter separated from the gas. During the preparation of aluminum ingots, at high temperatures, volatilization, oxidation, and condensation will form many particulate matter mixed in with the gas. Therefore, when treating the gas, it is necessary to remove the particulate matter mixed in with the gas. In the initial state, the dust collection cup 12 is not installed, and the first spring 9 is in the normal state, so that the movable rod 6 is at the end of its stroke towards the base 1, and controls the piston 7 to enter the guide ring 5, so that the guide ring 5 is in a blocked state. When it is necessary to filter the gas, the dust collection cup 12 is inserted into the dust collection tube 4, and the limiting block 13 is inserted into the slot 10 and the groove 11. The size of the slot 10 is the same as the size of the limiting block 13, and the groove 11 is... The size of the 1 is in the shape of two fan-shaped parts, and the size of the fan-shaped parts is the same as the distance between the center of the limiting block 13 and the dust collection cup 12. When the limiting block 13 is located in the groove 11, the dust collection cup 12 abuts against the fixing ring 8 and drives the movable rod 6 to move away from the base 1, so that the first spring 9 is compressed. The movable rod 6 will also drive the piston 7 to move, so that the piston 7 is disengaged from the guide ring 5. At this time, the dust collection cup 12 can be rotated, so that the limiting block 13 is separated from the slot 10. Under the action of the first spring 9, the dust collection cup 12 will not move. When the gas is introduced into the dust collection bucket 3, the particulate matter in the gas will be separated from the gas and fall into the dust collection pipe 4. Then, it enters the dust collection cup 12 through the guide ring 5 to collect the particulate matter.

[0056] Preferably, when the amount of particulate matter collected reaches a certain level, the dust collection cup 12 needs to be cleaned. At this time, the dust collection cup 12 is manually rotated so that the limiting block 13 rotates to the position that engages with the slot 10, and the limiting block 13 is controlled to disengage from the slot 10 to remove the dust collection cup 12. At the same time, the dust collection cup 12 will separate from the fixing ring 8, the first spring 9 is released elastically, and the moving rod 6 is driven to reset, so that the piston 7 re-enters the guide ring 5 to seal the dust collection tube 4, ensuring that the gas in the dust collection bucket 3 will not overflow during the cleaning of the dust collection cup 12.

[0057] Please see Figures 1-4 , Figures 7-10 A filter plate is movably installed inside the conveying pipe 14. The filter plate is used to filter the gas entering the conveying pipe 14. A receiving assembly connected to the filter plate is provided inside the conveying pipe 14. The receiving assembly is used to limit the position of the filter plate. The receiving assembly includes a limiting ring 17 fixedly installed on the conveying pipe 14 and symmetrically arranged. A first through groove 15 is opened on the conveying pipe 14 to communicate with one of the containers 18. A second through groove 16 is also opened on the conveying pipe 14 to communicate with the other container 18. The limiting ring 17 abuts against the filter plate.

[0058] Furthermore, the dust collection bin 3 and the dust collection pipe 4 combine to form a cyclone dust collector. However, the cyclone dust collector cannot remove small dust particles during dust removal. Therefore, a secondary filtration of the gas is required through a filter plate. Initially, the filter plate is placed between two limiting rings 17, and under the action of gravity, the filter plate abuts against the limiting ring 17 located towards the base 1. As the filter plate is used for a longer period of time, the filter holes on the filter plate will gradually become blocked, resulting in a smaller amount of gas passing through the filter plate per unit time. This increases the air pressure in the conveying pipe 14, indicating that the filter plate needs to be replaced. Under the action of air pressure, the filter plate is pushed to move away from the base 1. When the filter plate moves to the required position, under the action of the elastic component, the failed filter plate is pushed into one of the holding boxes 18, so as to achieve the effect of automatic replacement based on the filtration effect of the filter plate.

[0059] Please see Figures 1-4 , Figures 7-10A holding box 18 is fixedly installed on the dust collection bin 3 and arranged symmetrically. One holding box 18 is used to hold the unused filter plate, and the other holding box 18 is used to hold the used filter plate. An elastic component connected to the receiving component and the filter plate is provided inside the holding box 18. The elastic component can move after the filter plate is blocked and push the filter plate into one of the holding boxes 18. The elastic component includes a support rod 19 movably installed in one of the holding boxes 18 and passing through the holding box 18. An inclined block 21 passing through the conveying pipe 14 is fixed to one end of the support rod 19 facing the conveying pipe 14. A second spring 20 is sleeved on the support rod 19 and abuts against the inclined block 21. The support rod 19 is connected to the pushing mechanism, and the inclined block 21 cooperates with the filter plate.

[0060] Furthermore, there are two containers 18. One is used to hold unused filter plates, and the other is used to hold filter plates with clogged filter holes. In the initial state, the filter plate is in contact with the limiting ring 17, and the second spring 20 is in normal condition, so that the tilting block 21 is at the end of its stroke away from the container 18 and enters the delivery pipe 14. With the long-term use of this filter plate, the filter holes of the filter plate will become clogged, causing the air pressure in the delivery pipe 14 to increase, thereby pushing the filter plate to move. When the filter plate moves to contact the inclined surface of the tilting block 21, it pushes the tilting block 21 to move and drives the support rod 19 to move, so that the second spring 20 is compressed. When the inclined surface of the tilting block 21 separates from the filter plate, the filter plate just moves to the contact position of the other limiting ring 17 and is located in the position of engaging with the second through groove 16. At this time, the second spring 20 is released elastically and drives the tilting block 21 to move through the support rod 19. Under the action of the tilting block 21, the filter plate is pushed into the container 18.

[0061] Please see Figures 1-4 , Figures 7-10A pushing mechanism is disposed within the holding box 18 and connected to the elastic component. The pushing mechanism is capable of operating when the elastic component moves, pushing the filter plate within the holding box 18 into the conveying pipe 14. The pushing mechanism includes a receiving rod 22 fixedly installed on the support rod 19 at the end away from the inclined block 21. A rotating sleeve 23 is rotatably mounted on the holding box 18. A spiral groove 24 is formed on the outer wall of the rotating sleeve 23. The holding box 18 is provided with a connection to the rotating sleeve 23. The driven component includes a receiving rod 22 that engages with the first spiral groove 24, and a driven component that cooperates with the filter plate. The driven component includes a second spiral groove 27 formed within the rotating sleeve 23. A push rod 25 that penetrates the container 18 is movably installed within the rotating sleeve 23. A protrusion 26 that engages with the second spiral groove 27 is fixed on the push rod 25. A limiting rod is fixed on the container 18. A limiting groove that engages with the limiting rod is formed on the push rod 25. The push rod 25 cooperates with the filter plate.

[0062] In its initial state, the support rod 19 passes through one of the holding boxes 18 and the conveying pipe 14, and abuts against the filter plate located inside the conveying pipe 14. When the filter plate's filter holes are blocked and it moves towards the tilting block 21, it drives the tilting block 21 to move, and through the support rod 19, it drives the receiving rod 22 to move. Since the receiving rod 22 engages with the first spiral groove 24, the rotating sleeve 23 with the first spiral groove 24 rotates, thereby driving the second spiral groove 27 to move. Since multiple filter plates are placed above the push rod 25, in order to ensure that a new filter plate can enter the conveying pipe 14, it is necessary to control the push rod 25 to completely disengage from the holding box 18. Therefore, the stroke of the push rod 25 must be greater than the stroke of the tilting block 21. The first spiral groove 24 and the second spiral groove 27 are also spirally arranged, and the pitch of the first spiral groove 24 is smaller than that of the second spiral groove 27. Therefore, the second spiral groove 27 will drive the push rod 25, which is fixed with the protrusion 26, to move away from the conveying pipe 14. The stroke of the push rod 25 is greater than the stroke of the inclined block 21. Since the limiting rod is engaged with the limiting groove, the push rod 25 moves along the length of the rotating sleeve 23. When the inclined surface of the inclined block 21 separates from the filter plate, the push rod 25 disengages from the holding box 18. Under the action of gravity, the filter plate in the holding box 18 moves to the holding box 18 and abuts against it, and cooperates with the first through groove 15. At this time, the second spring 20 is released elastically and pushes the filter plate with blocked filter holes into another holding box 18 through the inclined block 21. At the same time, the receiving rod 22 is reset and drives the rotating sleeve 23 to reverse, so as to drive the push rod 25 to re-enter the holding box 18 and push the new filter plate into the conveying pipe 14, thereby realizing the effect of automatic filter plate replacement.

[0063] A gas absorption method for an intermediate gas absorption device in aluminum ingot preparation includes the following steps:

[0064] Step 1: The gas to be treated is introduced into the dust collection bin 3, and under the action of the dust collection bin 3, the dust mixed in the gas is separated from the gas and gradually falls into the dust collection pipe 4 under the action of gravity.

[0065] Step 2: Under the action of the dust collection mechanism, the dust collection pipe 4 is in a conductive state, and dust will fall into the dust collection mechanism. When the dust reaches a certain amount, the dust collection mechanism needs to be cleaned. During the cleaning process, the dust collection mechanism will block the dust collection pipe 4 to ensure that the gas in the dust collection bucket 3 will not overflow.

[0066] Step 3: The gas in the dust collector 3 will enter the conveying pipe 14, and under the action of the filter plate, the gas will be filtered again to remove the residual impurities in the gas.

[0067] Step 4: As the filter plate is used for a long time, the filter holes of the filter plate will become clogged, which will increase the air pressure in the delivery pipe 14 and push the filter plate to move in the delivery pipe 14. When the filter plate comes into contact with the elastic component, it drives the elastic component to move and drives the pushing mechanism to move, so that the filter plate enters one of the holding boxes 18. Under the action of the pushing mechanism, another new filter plate enters the delivery pipe 14.

[0068] Step 5: The gas passing through the filter plate will enter the spray tank 28, and under the action of the spray mechanism, the fluoride contained in the gas will be absorbed.

[0069] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0070] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas absorption device for the intermediate stage of aluminum ingot preparation, comprising: A base (1) is fixedly mounted on the base (1), and a dust collection bucket (3) is fixedly mounted on the bracket (2). A spray tank (28) is fixedly installed on the base (1). A conveying pipe (14) connected to the spray tank (28) is connected to the dust removal tank (3). A spray absorption mechanism connected to the conveying pipe (14) is provided inside the spray tank (28). The spray absorption mechanism can operate when the gas in the dust removal tank (3) is conveyed to the conveying pipe (14) through the conveying pipe (14). Its characteristic is that it further includes: A dust collection pipe (4) is fixedly installed at the bottom of the dust collection bucket (3). The dust collection bucket (3) is provided with a dust collection mechanism connected to the dust collection pipe (4). The dust collection mechanism can adjust the dust collection pipe (4) to be in a conductive or blocked state according to the dust collection state. A filter plate is movably installed inside the conveying pipe (14). The filter plate is used to filter the gas entering the conveying pipe (14). A receiving component connected to the filter plate is provided inside the conveying pipe (14). The receiving component is used to limit the position of the filter plate. The holding box (18) is fixedly installed on the dust collection bucket (3) and includes a first holding box and a second holding box arranged symmetrically. The first holding box is used to hold new filter plates, and the second holding box is used to hold clogged filter plates. The first holding box is provided with an elastic component connected to the receiving component and the clogged filter plate. The clogged filter plate increases the air pressure in the conveying pipe (14) and pushes the filter plate to move in the conveying pipe (14). When the clogged filter plate comes into contact with the elastic component, it drives the elastic component to move and pushes the clogged filter plate into the second holding box. A pushing mechanism is disposed in the first holding box and connected to the elastic component. The pushing mechanism can operate when the elastic component moves and push the new filter plate in the first holding box into the conveying pipe (14). The elastic component includes a support rod (19) movably installed inside and through the first container. An inclined block (21) is fixed to one end of the support rod (19) facing the conveying pipe (14) and passes through the conveying pipe (14). A second spring (20) is sleeved on the support rod (19) and abuts against the inclined block (21). The support rod (19) is connected to the pushing mechanism, and the inclined block (21) cooperates with the clogged filter plate.

2. The gas absorption device for an intermediate step in the production of aluminum ingots according to claim 1, characterized in that, The spray absorption mechanism includes a plurality of through holes (29) opened on the conveying pipe (14) and arranged equidistantly around the circumference. A limiting sleeve (30) is movably installed on the conveying pipe (14). A float plate (31) is fixed to one end of the limiting sleeve (30) facing the bottom of the spray tank (28). A pump assembly is provided on the spray tank (28).

3. The gas absorption device for an intermediate step in the production of aluminum ingots according to claim 2, characterized in that, The pump assembly includes a water pump (32) fixedly installed on the spray tank (28), and a conduit (33) through the spray tank (28) is fixed on the water pump (32). A nozzle (34) is fixed at one end of the conduit (33) away from the water pump (32).

4. The gas absorption apparatus for an intermediate step in the production of aluminum ingot according to claim 1, wherein The dust collection mechanism includes a slot (10) at the bottom of the dust collection tube (4), and a groove (11) communicating with the slot (10) is also provided at the bottom of the dust collection tube (4). A dust collection cup (12) is movably installed inside the dust collection tube (4). A symmetrically arranged limiting block (13) is fixed on the outer wall of the dust collection cup (12). The limiting block (13) engages with the groove (11) and the slot (10). A sealing component connected to the dust collection cup (12) is provided on the dust collection tube (4).

5. The apparatus for absorbing gas in an intermediate step of producing an aluminum ingot according to claim 4, wherein The sealing assembly includes a guide ring (5) fixedly installed inside the dust collection tube (4), a movable rod (6) is movably installed on the guide ring (5), and a piston (7) is fixed at one end of the movable rod (6) away from the dust collection tube (4), and the piston (7) cooperates with the guide ring (5). The sealing assembly also includes a fixing ring (8) fixedly installed on the end of the movable rod (6) away from the piston (7). A first spring (9) is sleeved on the movable rod (6) and abuts against the guide ring (5) and the fixing ring (8) respectively. The fixing ring (8) abuts against the dust cup (12).

6. The gas absorption apparatus for an intermediate step in the production of aluminum ingot according to claim 1, wherein The receiving component includes a limiting ring (17) fixedly installed on the conveying pipe (14) and symmetrically arranged. The conveying pipe (14) has a first through groove (15) that communicates with the first container box. The conveying pipe (14) also has a second through groove (16) that communicates with the second container box. The limiting ring (17) abuts against the new filter plate.

7. The gas absorption apparatus for an intermediate step in the production of aluminum ingot according to claim 1, wherein The pushing mechanism includes a receiving rod (22) fixedly installed on the support rod (19) at the end away from the inclined block (21). A rotating sleeve (23) is rotatably installed on the first container. A spiral groove (24) is formed on the outer wall of the rotating sleeve (23). A driven component connected to the rotating sleeve (23) is provided on the first container. The receiving rod (22) engages with the spiral groove (24). The driven component cooperates with the new filter plate.

8. The gas absorption apparatus for an intermediate step in the production of aluminum ingot according to claim 7, wherein The driven component includes a second spiral groove (27) opened in the rotating sleeve (23). A push rod (25) that passes through the first container is movably installed in the rotating sleeve (23). A protrusion (26) that engages with the second spiral groove (27) is fixed on the push rod (25). A limit rod is fixed on the first container. A limit groove that engages with the limit rod is opened on the push rod (25). The push rod (25) cooperates with the new filter plate.

9. An absorption method for an intermediate step gas absorption device for ingot production of aluminum, using the intermediate step gas absorption device for ingot production of aluminum according to any one of claims 1 to 8, characterized by, Includes the following steps: Step 1: Pass the gas to be treated into the dust collection bin (3), and under the action of the dust collection bin (3), the dust mixed in the gas is separated from the gas and gradually falls into the dust collection pipe (4) under the action of gravity. Step 2: Under the action of the dust collection mechanism, the dust collection pipe (4) is in a conductive state, and the dust will fall into the dust collection mechanism. When the dust reaches a certain amount, the dust collection mechanism needs to be cleaned. During the cleaning process, the dust collection mechanism will block the dust collection pipe (4) to ensure that the gas in the dust collection bucket (3) will not overflow. Step 3: The gas in the dust collector (3) will enter the conveying pipe (14) and be filtered again by the new filter plate to remove the residual impurities in the gas. Step 4: As the filter plate is used for a long time, the filter holes of the filter plate will be blocked, which will increase the air pressure in the conveying pipe (14) and push the filter plate to move in the conveying pipe (14). When the blocked filter plate comes into contact with the elastic component, it drives the elastic component to move and drives the pushing mechanism to move, so that the blocked filter plate enters the second holding box, and under the action of the pushing mechanism, a new filter plate enters the conveying pipe (14). Step 5: The gas passing through the new filter plate will enter the spray tank (28) and, under the action of the spray mechanism, absorb the fluoride contained in the gas.

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