Alkali-fog-containing waste gas purification equipment for drying aluminum hydroxide

Abstract

The invention discloses an alkali-fog-containing waste gas purification device for drying aluminum hydroxide, and relates to the technical field of waste gas purification, the alkali-fog-containing waste gas purification device comprises an air duct, and one end of the air duct is fixedly provided with a fan; according to the alkali-fog-containing waste gas purification equipment for drying the aluminum hydroxide, the storage cage can be driven by the motor to ascend and descend in the air duct, so that activated carbon with different heights is used for purifying waste gas, the whole desorption regeneration process is carried out while the activated carbon purifies the waste gas, and therefore, shutdown is not needed, and the cost is reduced. A filter screen is installed at the position of an opening of an inner barrel cavity of the air barrel, and in order to avoid unsmooth air inlet of the air barrel due to the fact that meshes of the filter screen are blocked after the filter screen is used for a long time, a cleaning roller sleeve capable of rotating and moving is arranged on the surface of the filter screen. The cleaning roller sleeve is driven by the motor through a related transmission structure, the motor drives the storage cage to ascend and descend at the same time, and the advantages of saving driving sources and saving energy are achieved.

Description

Technical Field

[0001] This invention relates to the field of waste gas purification technology, specifically to a waste gas purification device for drying aluminum hydroxide containing alkaline mist. Background Technology

[0002] The drying process of aluminum hydroxide generates a large amount of waste gas containing alkaline mist. This waste gas not only contains particulate matter such as aluminum hydroxide dust, but also highly corrosive alkaline mist components. Direct emission of this gas will cause air pollution, corrode equipment, and harm human health. Existing equipment for purifying alkaline mist waste gas mostly uses adsorption or absorption methods. Adsorption methods commonly use adsorbents such as activated carbon, but once the adsorbent is saturated, it needs to be shut down for replacement or regeneration, resulting in a decrease in waste gas treatment efficiency per unit time and an increase in alkaline mist emission concentration. At the same time, the aluminum hydroxide dust entrained in the waste gas can easily clog the pores of the adsorbent and the air inlet channels of the equipment, further affecting the purification effect. Summary of the Invention

[0003] The purpose of this invention is to provide an alkaline mist exhaust gas purification device for aluminum hydroxide drying, so as to solve the technical problems mentioned in the background art.

[0004] The objective of this invention can be achieved through the following technical solutions: A purification device for alkaline mist exhaust gas during aluminum hydroxide drying includes a duct, a fan fixedly installed at one end of the duct, a filter screen fixedly installed at the cavity opening of the duct, a fixed base vertically fixedly fitted on the outer wall of the duct, a motor installed on the outer wall of the fixed base, a drive shaft installed at the output end of the motor, a small gear fixedly fitted on the outer wall of the drive shaft, a large gear meshing with one side of the small gear, a storage cage slidably installed and lifted in the inner cavity of the fixed base, activated carbon detachably filled in the storage cage, a rack fixedly installed on one side of the storage cage, the rack meshing with the large gear, a connecting shaft detachably installed at the output end of the drive shaft, and a cleaning roller sleeve detachably installed at one end of the connecting shaft.

[0005] As a further embodiment of the present invention: the outer wall of the duct has an annular cavity through the inner cavity, the fixing seat is vertically inserted into the annular cavity, the width of the fixing seat is greater than the outer diameter of the duct, and the filter screen is embedded and fixedly installed in the inner cavity of the duct away from the fan, and the filter screen is designed to be flush with the end face of the duct.

[0006] As a further embodiment of the present invention: two connecting seats are fixedly installed on each of the two opposite outer walls of the fixed seat. The four connecting seats are of the same specification and are arranged in a rectangular array. Hot air pipes are fixedly connected to the side of the four connecting seats away from the fixed seat. Flange mounting plates are installed at the ends of the four hot air pipes. The four hot air pipes are connected to the inner cavity of the fixed seat through the corresponding connecting seats.

[0007] As a further embodiment of the present invention: a mounting base is vertically fixedly installed on one side of the fixed base, a motor is fixedly installed on one side of the mounting base, the small gear is rotatably installed in the mounting base, the large gear is embedded and rotatably installed at the connection between the mounting base and the fixed base, and the drive shaft extends through to the other side of the mounting base.

[0008] As a further embodiment of the present invention: a cleaning mechanism is detachably installed at the end of the drive shaft. The cleaning mechanism includes a retaining ring, which is disposed at the end of the drive shaft. A first screw is disposed on one side of the retaining ring. The head of the first screw passes through the retaining ring and is threaded onto the end of the drive shaft. The head of the first screw is attached to the side wall of the retaining ring.

[0009] As a further embodiment of the present invention: a connecting shaft is vertically fixedly installed on the outer ring wall of the fixed ring, a circular stop block is vertically fixedly installed on the connecting shaft away from the end of the fixed ring, a central shaft is vertically fixedly connected to the circular position on the other side of the circular stop block, and a cleaning roller sleeve is detachably fitted on the outer shaft wall of the central shaft.

[0010] As a further aspect of the present invention: a threaded hole is provided at the end of the central shaft away from the circular stop, and a cleaning roller sleeve is movably inserted into the outer shaft wall of the central shaft. The inner diameter of the cleaning roller sleeve is the same as the outer diameter of the central shaft. A second screw is threadedly installed at one end of the cleaning roller sleeve. The second screw is threaded through the cleaning roller sleeve and threadedly installed in the threaded hole.

[0011] As a further aspect of the present invention: several rollers are rotatably installed on the other side of the storage cage, and the rollers are all in rolling contact with the inner wall of the fixed seat. A storage cavity is opened on one side of the storage cage, and several air holes are opened through the bottom of the storage cavity through the outer wall of the storage cage. Activated carbon is embedded in the storage cavity.

[0012] As a further embodiment of the present invention: connection holes are provided at the four corners of one side of the storage cage, a filter plate is provided on one side of the storage cage, and a third screw is threadedly installed at the four corners of the filter plate. The four third screws penetrate the filter plate and are respectively threaded into the corresponding connection holes. The storage cage and the filter plate are respectively designed to fit into the two corresponding connecting seats.

[0013] As a further aspect of the present invention: the input end of the fan is connected to the inner cavity of the air duct, and the outer diameter of the fan is larger than the outer diameter of the air duct.

[0014] The beneficial effects of this invention are: First, this invention features a storage cage filled with activated carbon inside the air duct. The storage cage can be driven by a motor to move up and down within the air duct, allowing activated carbon at different heights to purify the exhaust gas. More notably, hot air pipes are installed on both sides of the storage cage, which deliver hot air through the storage cage. This allows the hot air to pass through the gaps in the activated carbon filling, thereby desorbing the activated carbon. This restores the saturated activated carbon to its original purification capacity, and the desorbed substances are released from the storage cage along with the hot air. The entire desorption and regeneration process occurs simultaneously with the activated carbon's purification of the exhaust gas, eliminating the need for shutdown, disassembly, and reinstallation, making it convenient to use. Secondly, to prevent dust from entering the air duct and clogging the activated carbon, thus reducing the filtration and purification effect of the activated carbon, a filter screen is installed at the inner cavity opening of the air duct. To prevent the filter screen from becoming clogged after long-term use and causing poor airflow in the air duct, a rotating cleaning roller sleeve is installed on the surface of the filter screen. More notably, the cleaning roller sleeve is driven by a motor through a related transmission structure. The motor also drives the lifting and lowering of the storage cage, which has the advantages of saving drive power and energy. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall first-view structure of the present invention; Figure 2 This is a schematic diagram of the overall second-view structure of the present invention; Figure 3 This is a schematic diagram of the motor drive structure of the present invention; Figure 4 This is a schematic diagram of the cleaning mechanism structure of the present invention; Figure 5 This is a schematic diagram of the cleaning roller sleeve installation structure of the present invention; Figure 6 This is a front cross-sectional view of the fixing base of the present invention; Figure 7 This is a schematic cross-sectional view of the side of the fixing base of the present invention; Figure 8 This is a schematic diagram of the installation structure of the storage cage of the present invention.

[0017] In the picture: 1. Air duct; 11. Filter screen; 2. Fixed base; 21. Connecting base; 22. Hot air duct; 23. Flange mounting plate; 24. Mounting base; 25. Motor; 26. Pinion gear; 27. Drive shaft; 28. Large gear; 3. Cleaning mechanism; 31. Fixing ring; 32. First screw; 33. Connecting shaft; 34. Circular stop; 35. Central shaft; 36. Cleaning roller sleeve; 4. Storage cage; 41. Rack; 42. Roller; 43. Storage chamber; 44. Air vent; 45. Connection hole; 46. Activated carbon; 47. Filter plate; 48. Third screw; 5. Fan. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.

[0019] like Figure 1-8 As shown, an alkaline mist exhaust gas purification device for aluminum hydroxide drying includes a duct 1, with a fan 5 fixedly installed at one end of the duct 1. The fan 5 is an axial flow fan. Its working principle is that when the impeller rotates, the gas enters the impeller axially from the air inlet (that is, the duct 1 in this invention), and the gas energy is increased by the pushing of the blades on the impeller, and then flows into the guide vane. The guide vanes convert the deflected airflow into axial flow and simultaneously guide the gas into the diffuser, further converting the gas's kinetic energy into pressure energy, which is then introduced into the working pipeline. A filter screen 11 is embedded and fixedly installed at the inner cavity opening of the air duct 1. A fixed base 2 is vertically fixedly mounted on the outer wall of the air duct 1. A motor 25 is installed on the outer wall of the fixed base 2, and a drive shaft 27 is installed at the output end of the motor 25. A small gear 26 is fixedly mounted on the outer shaft wall of the drive shaft 27. A large gear 28 is meshed on one side of the small gear 26. The outer diameter of the small gear 26 is smaller than that of the large gear 28. Because the storage cage 4, i.e., the activated carbon 46, does not require rapid lifting and lowering, while the cleaning roller sleeve 36 requires relatively rapid rotation, the small gear 26 is fixedly mounted on the drive shaft 2. 7. The rotation of the drive shaft 27 drives the large gear 28 to decelerate and increase torque. The storage cage 4 is slidably installed in the inner cavity of the fixed base 2. The storage cage 4 is detachably filled with activated carbon 46. The activated carbon 46 is formed by stacking many particles. Since the gaps between the particles are large, even if it is filled into the storage cage 4, it will not affect the normal air circulation. A rack 41 is fixedly installed on one side of the storage cage 4. The rack 41 meshes with the large gear 28. A connecting shaft 33 is detachably installed at the output end of the drive shaft 27. A cleaning roller sleeve 36 is detachably installed at one end of the connecting shaft 33 for easy replacement and to maintain a good cleaning effect. The input end of the fan 5 is connected to the inner cavity of the air duct 1. The outer diameter of the fan 5 is larger than the outer diameter of the air duct 1. like Figure 1-2As shown, what is particularly special is that the outer wall of the air duct 1 has an annular cavity through the inner cavity, and the fixing seat 2 is vertically inserted into the annular cavity. The width of the fixing seat 2 is greater than the outer diameter of the air duct 1. The filter screen 11 is embedded and fixedly installed in the inner cavity of the air duct 1 away from the fan 5. The filter screen 11 is made of fluoroplastic material and is designed to be flush with the end face of the air duct 1 to avoid the accumulation of alkaline mist and dust in the dead corner between the filter screen 11 and the inner cavity of the air duct 1.

[0020] As explained here, an elastic sealing isolation ring made of silicone rubber is provided at the part where the fixed seat 2 is embedded in the annular cavity of the air duct 1. The inner side of the isolation ring is tightly fitted with the outer wall of the air duct 1, and the outer side is pressed against the inner wall of the fixed seat 2, forming a physical isolation between the "fixed seat inner cavity (hot airflow channel)" and the "air duct inner cavity (purified airflow channel)". This prevents hot airflow from directly entering the air duct from the gap between the fixed seat and the air duct, and only allows hot airflow to flow in the gap of the activated carbon 46 in the storage cage 4 and be discharged from the hot air pipe on the other side.

[0021] High-temperature resistant sealing gaskets made of polytetrafluoroethylene are provided on both end faces of the storage cage 4 and the surfaces that fit with the connecting seat 21. The edges of the sealing gaskets extend 1-2mm beyond the end face of the storage cage 4, and corresponding sealing grooves are opened on the mating surfaces of the connecting seat 21. This ensures that the storage cage remains sealed and fitted with the connecting seat when it is raised and lowered, and that the hot airflow only enters the gap of the activated carbon 46 in the storage cage 4 through the connecting seat 21, and does not leak from the gap between the storage cage and the connecting seat to the air duct 1.

[0022] like Figure 1-3 As shown, particularly noteworthy is that two connecting seats 21 are fixedly installed on each of the two opposite outer walls of the fixed base 2. The four connecting seats 21 are of the same specification and are arranged in a rectangular array. The hot air pipes 22 are fixedly connected to the side of the four connecting seats 21 away from the fixed base 2. Flange mounting plates 23 are installed at the ends of the four hot air pipes 22 to facilitate connection with the hot air source and the desorbed material treatment pipeline. The four hot air pipes 22 are all connected to the inner cavity of the fixed base 2 through the corresponding connecting seats 21 to ensure smooth flow of hot air. A mounting base 24 is vertically fixedly installed at the center of one side of the fixed base 2. A motor 25 is fixedly installed on one side of the mounting base 24. A small gear 26 is rotatably installed in the mounting base 24 to ensure stable and reliable rotational installation and no loosening or jamming during meshing transmission. A large gear 28 is embedded and rotatably installed at the connection between the mounting base 24 and the fixed base 2. The drive shaft 27 extends through to the other side of the mounting base 24. like Figure 4-5As shown, a particularly noteworthy feature is that a cleaning mechanism 3 is detachably mounted at the end of the drive shaft 27. The cleaning mechanism 3 includes a retaining ring 31, which is located at the end of the drive shaft 27. The end of the drive shaft 27 extends beyond the end face of the air duct 1, ensuring that the final cleaning roller sleeve 36 makes rolling contact with the end face of the air duct 1, i.e., the filter screen 11. A first screw 32 is provided on one side of the retaining ring 31. The head of the first screw 32 passes through the retaining ring 31 and is threaded onto the end of the drive shaft 27. A mating hole is pre-drilled at the end of the drive shaft 27 to facilitate the positioning of the first screw 32. The retaining ring 31 is fixed in place, with the head of the first screw 32 attached to the side wall of the retaining ring 31 to ensure stable and reliable compression. A connecting shaft 33 is vertically fixed to the outer ring wall of the retaining ring 31. A circular stop 34 is vertically fixed to the end of the connecting shaft 33 away from the retaining ring 31, facilitating the direct insertion of the cleaning roller sleeve 36 onto the circular stop 34 and optimizing the installation process. A central shaft 35 is vertically fixed to the circular position on the other side of the circular stop 34. The cleaning roller sleeve 36 is detachably fitted onto the outer shaft wall of the central shaft 35. The central shaft 35 is located away from the circular stop 34. 4. A threaded hole is provided at one end of the central shaft 35. A cleaning roller sleeve 36 is movably inserted into the outer shaft wall of the central shaft 35. The outer layer of the cleaning roller sleeve 36 is wrapped with an alkali-resistant brush 37. The brush material is polyetheretherketone (PEEK) to ensure that it does not age or fail in an alkaline mist environment. The inner diameter of the cleaning roller sleeve 36 is the same as the outer diameter of the central shaft 35. A second screw is threaded onto one end of the cleaning roller sleeve 36. The thread of the second screw penetrates the cleaning roller sleeve 36 and is threaded into the threaded hole. The function of the second screw is to prevent the cleaning roller sleeve 36 from escaping from the central shaft 35 when the central shaft 35 rotates. The second screw does not need to be fully tightened. However, since the direction of rotation is perpendicular to the tangent of the direction of loosening of the second screw, the second screw, which is not fully tightened, will not loosen or fall off during the rotation of the central shaft 35, thus preventing the cleaning roller sleeve 36 from falling off. On the contrary, since the cleaning roller sleeve 36 is not squeezed, limited, or fixed, it rotates continuously due to rolling friction when it comes into contact with the filter screen 11. This allows the surface of the cleaning roller sleeve 36 to fully participate in the cleaning operation of the filter screen 11, improving the cleaning effect of the cleaning roller sleeve 36. like Figure 6-8As shown, particularly noteworthy is that several rollers 42 are rotatably mounted on the other side of the storage cage 4. These rollers 42 all roll in contact with the inner wall of the fixed base 2. The purpose of the rollers 42 is to reduce the frictional resistance generated during the lifting and lowering of the storage cage 4, and to reduce wear on the sides of the storage cage 4. A storage cavity 43 is provided on one side of the storage cage 4. Several air holes 44 are provided at the bottom of the storage cavity 43, penetrating the outer wall of the storage cage 4. The purpose of the air holes 44 is to ensure unobstructed airflow inside and outside the storage cage 4. Exhaust gas from the duct 1 can pass through the air holes 44 and enter the gaps between the activated carbon 46 in the storage cavity 43. Activated carbon 46 and modified activated carbon 46 are embedded in the storage cavity 43. 6. Honeycomb activated carbon is modified by impregnation with sodium hydroxide solution; connection holes 45 are opened at the four corners of one side of the storage cage 4, and a filter plate 47 is set on one side of the storage cage 4. The filter plate 47 and the filter screen 11 have similar structures. Therefore, the waste gas entering the gap of the activated carbon 46 can pass through the filter plate 47 and continue to enter the inner cavity of the air duct 1 after being purified by the activated carbon 46, and is finally extracted by the fan 5. The four corners of the filter plate 47 are threaded with third screws 48. The four third screws 48 pass through the filter plate 47 and are respectively threaded into the corresponding connection holes 45. The storage cage 4 and the filter plate 47 are respectively designed to fit with the two corresponding connecting seats 21.

[0023] Working principle of the invention: First, start the fan 5 to exhaust the air in the inner cavity of the air duct 1, and then draw the alkaline mist exhaust gas generated by the drying of aluminum hydroxide from the other end into the air duct 1. The dust in the exhaust gas will be filtered and intercepted outside the air duct 1 by the filter screen 11 and remain on the surface of the filter screen 11. The exhaust gas that has passed through the primary filter enters the inner cavity of the air duct and flows with the change of air pressure. Since the cross-section of the inner cavity of the air duct 1 is intercepted by the storage cage 4, and the storage cavity 43 of the storage cage 4 is filled with a number of activated carbon 46, there are gaps between the activated carbon 46. Therefore, the exhaust gas will pass through the gaps between the activated carbon 46. During the process of passing through the surface of the activated carbon 46, the alkaline mist will be adsorbed by the activated carbon 46, and the purified air will be drawn out and discharged by the fan 5. The second step involves simultaneously starting motor 25. Motor 25 drives drive shaft 27 to rotate, which in turn drives pinion 26 to rotate, which in turn drives large gear 28 to rotate in the opposite direction at reduced speed. Due to the interaction between large gear 28 and rack 41, the storage cage 4 is able to move up and down within the cavity of fixed base 2. Since the storage cage 4 is filled with activated carbon 46, the activated carbon 46 horizontally intercepted within the cavity of air duct 1 is constantly being replaced, thus maintaining the overall purification effect of activated carbon 46 for a longer period of time. More notably, while the storage cage 4 is moving up and down, the heat source is directed to one side. Hot air is injected into the two hot air pipes 22. The hot air flows from one side of the storage cage 4 to the other side. During the process of passing through the storage cage 4, the hot air directly impacts and penetrates through the gaps of the saturated activated carbon 46 from the connecting seat 21, thus achieving a good desorption and regeneration effect on the saturated activated carbon 46. Furthermore, the desorbed material is separated from and discharged from the storage cage 4 along with the hot air. The entire desorption and regeneration process is carried out simultaneously with the activated carbon 46 purifying the waste gas. Therefore, there is no need to stop the machine or disassemble and reinstall it, making it convenient to use. Thirdly, while the drive shaft 27 rotates, it also drives the fixed ring 31 to rotate, which in turn drives the connecting shaft 33, the circular stop block 34, the central shaft 35, and the cleaning roller sleeve 36 to rotate around the drive shaft 27. The cleaning roller sleeve 36 rotates over the surface of the filter screen 11 and picks up and sweeps the dust trapped in the exhaust gas by rolling. The cleaning roller sleeve 36 is disassembled and replaced regularly to ensure a good cleaning effect on the dust on the surface of the filter screen 11. The specific cleaning steps are as follows: loosen the third screw 48 so that the rotation of the drive shaft 27 no longer drives the entire cleaning mechanism 3 to rotate; remove the second screw to remove the cleaning roller sleeve 36 along the axial direction of the central shaft 35 and replace it; finally, tighten the third screw 48 so that the rotation of the drive shaft 27 can drive the entire cleaning mechanism 3 to rotate. The entire cleaning process is carried out under the premise that the machine needs to be stopped, so it will not affect the purification of exhaust gas by the activated carbon 46, nor will it affect the desorption and regeneration of the activated carbon 46 by the hot air flow.

[0024] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A purification device for alkaline mist exhaust gas in aluminum hydroxide drying, comprising a duct (1), wherein a fan (5) is fixedly installed at one end of the duct (1), and a filter screen (11) is embedded and fixedly installed at the cavity opening of the duct (1), characterized in that, The outer wall of the air duct (1) is vertically fixed with a fixed seat (2). A motor (25) is provided on the outer wall of the fixed seat (2). A drive shaft (27) is installed at the output end of the motor (25). A small gear (26) is fixedly installed on the outer wall of the drive shaft (27). A large gear (28) is meshed on one side of the small gear (26). A storage cage (4) is slidably installed in the inner cavity of the fixed seat (2). Activated carbon (46) is detachably filled in the storage cage (4). A rack (41) is fixedly installed on one side of the storage cage (4). The rack (41) meshes with the large gear (28). A connecting shaft (33) is detachably installed at the output end of the drive shaft (27). A cleaning roller sleeve (36) is detachably installed at one end of the connecting shaft (33).

2. The alkaline mist exhaust gas purification device for aluminum hydroxide drying according to claim 1, characterized in that, The outer wall of the air duct (1) has an annular cavity through the inner cavity. The fixing seat (2) is vertically inserted into the annular cavity. The width of the fixing seat (2) is greater than the outer diameter of the air duct (1). The filter screen (11) is embedded and fixedly installed in the inner cavity of the air duct (1) away from the fan (5). The filter screen (11) is designed to be flush with the end face of the air duct (1).

3. The alkaline mist exhaust gas purification equipment for aluminum hydroxide drying according to claim 2, characterized in that, Two connecting seats (21) are fixedly installed on each of the two opposite outer walls of the fixed seat (2). The four connecting seats (21) are of the same specification and are arranged in a rectangular array. The four connecting seats (21) are fixedly connected to the hot air pipes (22) on the side away from the fixed seat (2). The ends of the four hot air pipes (22) are all equipped with flange mounting plates (23). The four hot air pipes (22) are all connected to the inner cavity of the fixed seat (2) through the corresponding connecting seats (21).

4. The alkaline mist exhaust gas purification equipment for aluminum hydroxide drying according to claim 3, characterized in that, A mounting base (24) is vertically fixedly installed on one side of the fixed base (2). A motor (25) is fixedly installed on one side of the mounting base (24). The small gear (26) is rotatably installed in the mounting base (24). The large gear (28) is embedded and rotatably installed at the connection between the mounting base (24) and the fixed base (2). The drive shaft (27) extends through to the other side of the mounting base (24).

5. The alkaline mist exhaust gas purification device for aluminum hydroxide drying according to claim 4, characterized in that, A cleaning mechanism (3) is detachably installed at the end of the drive shaft (27). The cleaning mechanism (3) includes a retaining ring (31), which is located at the end of the drive shaft (27). A first screw (32) is provided on one side of the retaining ring (31). The head of the first screw (32) passes through the retaining ring (31) and is threaded onto the end of the drive shaft (27). The head of the first screw (32) is attached to the side wall of the retaining ring (31).

6. The alkaline mist exhaust gas purification device for aluminum hydroxide drying according to claim 5, characterized in that, The connecting shaft (33) is vertically fixed to the outer ring wall of the fixed ring (31). A circular stop (34) is vertically fixed to the end of the connecting shaft (33) away from the fixed ring (31). A central shaft (35) is vertically fixed to the other circular position of the circular stop (34). A cleaning roller sleeve (36) is detachably fitted to the outer shaft wall of the central shaft (35).

7. The alkaline mist exhaust gas purification device for aluminum hydroxide drying according to claim 6, characterized in that, The central shaft (35) has a threaded hole at one end away from the circular stop (34). A cleaning roller sleeve (36) is movably inserted into the outer shaft wall of the central shaft (35). The inner diameter of the cleaning roller sleeve (36) is the same as the outer diameter of the central shaft (35). A second screw is threaded onto one end of the cleaning roller sleeve (36). The second screw is threaded through the cleaning roller sleeve (36) and threaded into the threaded hole.

8. The alkaline mist exhaust gas purification device for aluminum hydroxide drying according to claim 7, characterized in that, Several rollers (42) are rotatably installed on the other side of the storage cage (4). The rollers (42) all roll in contact with the inner wall of the fixed seat (2). A storage cavity (43) is opened on one side of the storage cage (4). Several air holes (44) are opened through the bottom of the storage cavity (43) through the outer wall of the storage cage (4). Activated carbon (46) is embedded in the storage cavity (43).

9. The alkaline mist exhaust gas purification equipment for aluminum hydroxide drying according to claim 8, characterized in that, The storage cage (4) has four connecting holes (45) at each of its four corners. A filter plate (47) is provided on one side of the storage cage (4). A third screw (48) is threaded onto each of the four corners of the filter plate (47). The four third screws (48) pass through the filter plate (47) and are threaded into the corresponding connecting holes (45). The storage cage (4) and the filter plate (47) are designed to fit into the corresponding two connecting seats (21).

10. The alkaline mist exhaust gas purification device for aluminum hydroxide drying according to claim 9, characterized in that, The input end of the fan (5) is connected to the inner cavity of the air duct (1), and the outer diameter of the fan (5) is larger than the outer diameter of the air duct (1).

Images