Sludge discharging and filtering device for leaf filter

Abstract

The sludge discharging and filtering device comprises a filter box main body and a cover plate fixed to the upper end of the filter box main body through bolts, a liquid inlet pipe is arranged on the side wall of the filter box main body, a liquid discharging pipe is arranged at the lower end of the side, symmetrical to the liquid inlet pipe, of the filter box main body, and multiple filtering mechanisms are arranged in the filter box main body. The multi-filtering mechanism is connected with a filtering plate cleaning mechanism, and an automatic deslagging mechanism is arranged at the bottom of the filtering box main body; the multi-filtering mechanism comprises a supporting plate fixed on the inner wall of the filter box main body, a supporting plate parallel to the supporting plate is arranged above the supporting plate, and a plurality of stainless steel filter plates are connected to the supporting plate along the direction of a longer side in an inserting and pulling manner; the filter plate cleaning mechanism is composed of a sliding rail, a moving plate and a cleaning roller; and the automatic deslagging mechanism comprises a precipitation tank, a deslagging pipe and a spiral conveying roller. The invention belongs to the technical field of filtering of leaf filters, and particularly relates to a sludge discharging and filtering device for a leaf filter.

Description

Technical Field

[0001] This invention belongs to the field of leaf filter technology, specifically referring to a sludge removal and filtration device for leaf filters. Background Technology

[0002] Leaf filters, as a type of pressure filtration equipment, are widely used in chemical, metallurgical, and environmental protection fields, and play an important role, especially in the alumina production process. Traditional leaf filters mainly include vertical leaf filters and continuous slag discharge leaf filters, which mainly achieve solid-liquid separation through filter cloth or filter screen.

[0003] To protect leaf filters, secondary filtration protection devices are usually installed. For example, a sludge discharge filtration device for leaf filters is disclosed in application number CN202520298891.7. By installing it on the leaf filter and using the filter plate inside, it can provide sufficient protection for the leaf filter while making it easy to judge changes in the solid content of the material, and reducing wear on the internal structure of the leaf filter.

[0004] However, during the alumina production process, filter plates or filter cloths are prone to scaling and are difficult to clean, requiring periodic replacement of the filter cloth, which increases production costs and maintenance burden. Moreover, when the solid content of the material is high, the filter cloth clogs faster, affecting filtration efficiency. In particular, when the filter cake is full, the machine needs to be stopped to discharge the material, causing production interruption. In addition, the existing leaf filter sludge discharge device often has problems such as poor discharge of filter residue and back absorption of filtrate, resulting in problems such as low dryness and high alkali content of white mud. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a sludge removal and filtration device for leaf filters, which effectively solves the problem that the filter plates or filter cloths of existing leaf filters are easily clogged and affect the filtration efficiency, while also solving the problem of frequent shutdowns for cleaning and production interruptions, and solving the problem of poor sediment removal.

[0006] The technical solution adopted by this invention is as follows: This invention proposes a sludge removal and filtration device for a leaf filter, comprising a filter box body and a cover plate fixed to the upper end of the filter box body by bolts. An inlet pipe is provided on the side wall of the filter box body, and a drain pipe is provided at the lower end of the filter box body on the side symmetrical to the inlet pipe. A multi-stage filtration mechanism is provided inside the filter box body, and a filter plate cleaning mechanism is connected to the multi-stage filtration mechanism. An automatic sludge removal mechanism is provided at the bottom of the filter box body, and the automatic sludge removal mechanism is located below the multi-stage filtration mechanism. The multi-stage filtration mechanism includes a support plate fixed to the inner wall of the filter box body, and a support plate parallel to the support plate is provided above the support plate, and the support plate is pluggable. The filter box body is attached to the upper end. Several stainless steel filter plates are inserted and pulled along the longer side of the support plate, with each stainless steel filter plate evenly distributed. The filter plate cleaning mechanism consists of a slide rail, a moving plate, and a cleaning roller. Two sets of slide rails are symmetrically fixed to both sides of the upper end of the support plate, and the moving plate is slidably connected to the slide rail. The cleaning roller is rotatably connected to the moving plate and inserted into the stainless steel filter plate. The automatic slag discharge mechanism includes a sedimentation tank, a slag discharge pipe, and a spiral conveying roller. The sedimentation tank is fixed to the bottom of the filter box body and arranged at intervals with the stainless steel filter plates. The slag discharge pipe is connected to the bottom of one end of the sedimentation tank, and the spiral conveying roller is rotatably connected inside the slag discharge pipe.

[0007] Furthermore, a sealing gasket is provided between the support plate and the support bracket, and the support plate is fixed to the support bracket by bolts passing through the sealing gasket. Several U-shaped sealing strips are evenly distributed on the inner wall of the filter box body and correspond one-to-one with the stainless steel filter plate. The bottom of the stainless steel filter plate is provided with a sealing groove that cooperates with the sealing strip, that is, the stainless steel filter plate is connected to the sealing strip by inserting and pulling through the sealing groove at the bottom.

[0008] Furthermore, a screw is rotatably connected to the inner wall of the filter box body, and the screw is parallel to the support plate and perpendicular to the moving plate. A drive slider is fixed to the moving plate by bolts, and the drive slider is threaded to the screw. A reducer connected to the screw is provided on the side wall of the filter box body, and a cleaning motor is connected to the reducer.

[0009] Furthermore, the lower end of the cover plate is evenly distributed with several racks, and the racks are arranged parallel to the screw. The upper end of the cleaning roller is fixed with a gear, and the gear meshes with the racks.

[0010] Furthermore, the slag discharge pipe is equipped with an electromagnetic slag discharge valve, and a discharge motor is fixed at one end of the sedimentation tank, with the output shaft of the discharge motor connected to the screw conveyor roller.

[0011] Furthermore, the sidewall of the cleaning roller is evenly covered with several bristles, which are made of nylon material.

[0012] Furthermore, the support plate is a cuboid with an open top, and several through holes are evenly distributed on the side wall of the support plate. The diameter of the through holes on each stainless steel filter plate gradually decreases from the liquid inlet pipe to the liquid outlet pipe. The support plate and the sealing gasket are both arranged in a U-shape.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows: 1. The entire system adopts a multi-stage filtration mechanism. Through the structural design of multiple sets of stainless steel filter plates, it can effectively filter solid impurities in liquids, ensuring the filtration effect of the leaf filter. 2. The stainless steel filter plate adopts a hollow plate shape and is equipped with a filter plate cleaning mechanism. This allows the cleaning roller to unclog the stainless steel filter plate from the inside to the outside, ensuring the filtration efficiency of the stainless steel filter plate, enabling reusability, extending the service life, and reducing losses caused by downtime. 3. The automatic slag discharge mechanism at the bottom enables real-time and automatic slag discharge, reducing manual operation and lowering labor costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a sludge removal and filtration device for a leaf filter proposed in this invention. Figure 2 This is a first-view cross-sectional view of a sludge removal and filtration device for a leaf filter proposed in this invention. Figure 3 This is a schematic diagram of the internal structure of a sludge removal and filtration device for a leaf filter proposed in this invention; Figure 4 This is a cross-sectional view from a second perspective of a sludge removal and filtration device for a leaf filter proposed in this invention. Figure 5 This is an exploded view of the structure of a sludge removal and filtration device for a leaf filter proposed in this invention. Figure 6 This is a component diagram of the cover plate in this embodiment; Figure 7 This is a component diagram of the stainless steel filter plate in this embodiment; Figure 8 This is a component diagram of the cleaning roller in this embodiment.

[0015] The components include: 1. Filter box body; 2. Cover plate; 3. Liquid inlet pipe; 4. Liquid outlet pipe; 5. Multi-stage filtration mechanism; 6. Filter plate cleaning mechanism; 7. Automatic slag discharge mechanism; 8. Support plate; 9. Support plate; 10. Stainless steel filter plate; 11. Slide rail; 12. Moving plate; 13. Cleaning roller; 14. Sedimentation tank; 15. Slag discharge pipe; 16. Screw conveyor roller; 17. Sealing gasket; 18. Sealing strip; 19. Sealing groove; 20. Screw; 21. Drive slider; 22. Reducer; 23. Cleaning motor; 24. Rack; 25. Gear; 26. Electromagnetic slag discharge valve; 27. Discharge motor; 28. Brush bristles.

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention proposes a sludge removal and filtration device for a leaf filter, comprising a filter box body 1 and a cover plate 2 fixed to the upper end of the filter box body 1 by bolts. The filter box body 1 is provided with an inlet pipe 3 on its side wall, and a drain pipe 4 is provided at the lower end of the filter box body 1 on the side symmetrical to the inlet pipe 3. The filter box body 1 is provided with a multi-stage filtration mechanism 5, and a filter plate cleaning mechanism 6 is connected to the multi-stage filtration mechanism 5. The bottom of the filter box body 1 is provided with an automatic sludge removal mechanism 7, and the automatic sludge removal mechanism 7 is located below the multi-stage filtration mechanism 5. In order to achieve filtration of slurry and ensure filtration effect, the multi-filtration mechanism 5 includes a support plate 8 fixed on the inner wall of the filter box body 1. A support plate 9 parallel to the support plate 8 is provided above the support plate 8. The support plate 9 is plugged and connected to the upper end of the filter box body 1. At the same time, a number of stainless steel filter plates 10 are plugged and connected to the support plate 9 along the direction of the longer side, and each stainless steel filter plate 10 is equidistantly distributed. In order to clean the stainless steel filter plate 10, the filter plate cleaning mechanism 6 consists of a slide rail 11, a moving plate 12 and a cleaning roller 13. The slide rail 11 is provided in two sets and is symmetrically fixed on both sides of the upper end of the support plate 9. The moving plate 12 is slidably connected to the slide rail 11, and the cleaning roller 13 is rotatably connected to the moving plate 12 and inserted into the stainless steel filter plate 10. In order to remove the deposited solid impurities, the automatic slag discharge mechanism 7 includes a sedimentation tank 14, a slag discharge pipe 15 and a spiral conveying roller 16. The sedimentation tank 14 is fixed to the bottom of the filter box body 1 and is arranged at intervals with the stainless steel filter plate 10. The slag discharge pipe 15 is connected to the bottom of one end of the sedimentation tank 14, and the spiral conveying roller 16 is rotatably connected to the slag discharge pipe 15.

[0019] like Figure 3 and Figure 5 As shown, a sealing gasket 17 is provided between the support plate 9 and the support bracket 8, and the support plate 9 is fixed to the support bracket 8 by bolts passing through the sealing gasket 17. Several U-shaped sealing strips 18 are evenly distributed on the inner wall of the filter box body 1 and correspond one-to-one with the stainless steel filter plate 10. The bottom of the stainless steel filter plate 10 is provided with a sealing groove 19 that cooperates with the sealing strips 18. That is, the stainless steel filter plate 10 is connected to the sealing strips 18 by inserting and pulling through the sealing groove 19 at the bottom.

[0020] like Figure 3 A screw 20 is rotatably connected to the inner wall of the filter box body 1. The screw 20 is parallel to the support plate 9 and perpendicular to the moving plate 12. A drive slider 21 is fixed to the moving plate 12 by bolts. The drive slider 21 is threaded to the screw 20. A reducer 22 connected to the screw 20 is provided on the side wall of the filter box body 1. At the same time, a cleaning motor 23 is connected to the reducer 22.

[0021] like Figure 3 and Figure 6 As shown, several racks 24 are evenly distributed at the lower end of the cover plate 2, and the racks 24 are arranged parallel to the screw 20. A gear 25 is fixed at the upper end of the cleaning roller 13, and the gear 25 meshes with the racks 24.

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, an electromagnetic slag discharge valve 26 is provided on the slag discharge pipe 15, and a discharge motor 27 is fixed at one end of the sedimentation tank 14, and the output shaft of the discharge motor 27 is connected to the screw conveyor roller 16.

[0023] like Figure 2 and Figure 8 The sidewall of the cleaning roller 13 is evenly covered with several bristles 28, which are made of nylon.

[0024] like Figure 7 As shown, the support plate 9 is a cuboid with an open top, and several through holes are evenly distributed on the side wall of the support plate 9. The diameter of the through holes on each stainless steel filter plate 10 gradually decreases from the liquid inlet pipe 3 to the liquid outlet pipe 4. The support plate 8 and the sealing gasket 17 are both arranged in a U-shape.

[0025] In practical use, several stainless steel filter plates 10 are inserted sequentially into the through grooves on the support plate 9. The sealing gasket 17 is placed on the support bracket 8 on the inner wall of the filter box body 1. Then, the support plate 9 is slightly tilted and the screw 20 is inserted from the top side of the filter box body 1 to the bottom until the entire support plate 9 is parallel to the support bracket 8. Then, bolts are used to pass through the support plate 9 and the sealing gasket 17 in sequence and screwed onto the support bracket 8 to complete the fixation, so that the support plate 9 presses the sealing gasket 17 tightly. Then, the drive slider 21 threaded to the screw 20 is fixed to the moving plate 12 by bolts. Then, the cover plate 2 is placed on the upper end of the filter box body 1, so that the rack 24 at its bottom meshes with each set of gears 25. Then, the cover plate 2 is fixed to the filter box body 1 by bolts. The external slurry is sent into the filter box body 1 through the liquid inlet pipe 3. After being filtered by multiple sets of stainless steel filter plates 10, the liquid is discharged from one side of the drain pipe 4, while solid impurities are filtered between each set of stainless steel filter plates 10. Over time, the filter box body 1... After the internal water flow stabilizes, solid impurities settle into the sedimentation tank 14. When it is necessary to clean the sediment, simply turn on the discharge motor 27 to drive the spiral conveyor roller 16 to rotate and open the electromagnetic slag discharge valve 26. The sediment in the sedimentation tank 14 can be transported to the slag discharge pipe 15 and discharged through the slag discharge pipe 15. When it is necessary to clean the through holes on the stainless steel filter plate 10, simply turn on the cleaning motor 23 to drive the screw 20 to rotate through the reducer 22. This causes the drive slider 21, which is threaded onto the screw 20, to drive the moving plate 12 connected to the drive slider 21 to slide along the slide rail 11. This allows the cleaning rollers 13 on the moving plate 12 to clean the inner wall of the stainless steel filter plate 10. During this process, the gear 25 at the upper end of the cleaning roller 13, under the action of the gear 24 meshing with it, drives the cleaning roller 13 to rotate. The bristles 28 on the cleaning roller 13 can then pass through the through holes of the stainless steel filter plate 10 from the inside to the outside to complete the unblocking. The above is the entire process of using the sludge removal and filtration device for the leaf filter.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A sludge removal and filtration device for a leaf filter, comprising a filter box body (1) and a cover plate (2) bolted to the upper end of the filter box body (1), wherein an inlet pipe (3) is provided on the side wall of the filter box body (1), and a drain pipe (4) is provided at the lower end of the filter box body (1) on the side symmetrical to the inlet pipe (3), characterized in that: The filter box body (1) is provided with a multi-stage filtration mechanism (5), and a filter plate cleaning mechanism (6) is connected to the multi-stage filtration mechanism (5). The bottom of the filter box body (1) is provided with an automatic slag discharge mechanism (7), and the automatic slag discharge mechanism (7) is located below the multi-stage filtration mechanism (5). The multi-filtration mechanism (5) includes a support plate (8) fixed on the inner wall of the filter box body (1). A support plate (9) parallel to the support plate (8) is provided above the support plate (8). The support plate (9) is plugged into the upper end of the filter box body (1). At the same time, a number of stainless steel filter plates (10) are plugged into the support plate (9) along the direction of the longer side. The stainless steel filter plates (10) are equidistantly distributed. The filter plate cleaning mechanism (6) consists of a slide rail (11), a moving plate (12) and a cleaning roller (13). The slide rail (11) is provided in two sets and is symmetrically fixed on both sides of the upper end of the support plate (9). The moving plate (12) is slidably connected to the slide rail (11). The cleaning roller (13) is rotatably connected to the moving plate (12) and inserted into the stainless steel filter plate (10). The automatic slag discharge mechanism (7) includes a sedimentation tank (14), a slag discharge pipe (15), and a spiral conveying roller (16). The sedimentation tank (14) is fixed to the bottom of the filter box body (1) and is arranged at intervals with the stainless steel filter plate (10). The slag discharge pipe (15) is connected to the bottom of one end of the sedimentation tank (14), and the spiral conveying roller (16) is rotatably connected to the slag discharge pipe (15).

2. The sludge removal and filtration device for a leaf filter according to claim 1, characterized in that: A sealing gasket (17) is provided between the support plate (9) and the support bracket (8), and the support plate (9) is fixed to the support bracket (8) by bolts passing through the sealing gasket (17). Several U-shaped sealing strips (18) are evenly distributed on the inner wall of the filter box body (1) and correspond one-to-one with the stainless steel filter plate (10). The bottom of the stainless steel filter plate (10) is provided with a sealing groove (19) that cooperates with the sealing strip (18). That is, the stainless steel filter plate (10) is connected to the sealing strip (18) by inserting and pulling through the sealing groove (19) at the bottom.

3. A sludge removal and filtration device for a leaf filter according to claim 2, characterized in that: A screw (20) is rotatably connected to the inner wall of the filter box body (1), and the screw (20) is parallel to the support plate (9) and perpendicular to the moving plate (12). A drive slider (21) is fixed on the moving plate (12) by bolts, and the drive slider (21) is threaded to the screw (20). A reducer (22) connected to the screw (20) is provided on the side wall of the filter box body (1), and a cleaning motor (23) is connected to the reducer (22).

4. A sludge removal and filtration device for a leaf filter according to claim 3, characterized in that: The lower end of the cover plate (2) is evenly distributed with several racks (24), and the racks (24) are arranged in parallel with the screw (20). The upper end of the cleaning roller (13) is fixed with a gear (25), and the gear (25) meshes with the rack (24).

5. A sludge removal and filtration device for a leaf filter according to claim 4, characterized in that: The slag discharge pipe (15) is equipped with an electromagnetic slag discharge valve (26), and a discharge motor (27) is fixed at one end of the sedimentation tank (14), and the output shaft of the discharge motor (27) is connected to the spiral conveying roller (16).

6. A sludge removal and filtration device for a leaf filter according to claim 5, characterized in that: The cleaning roller (13) has a number of bristles (28) evenly distributed on its sidewall, and the bristles (28) are made of nylon material.

7. A sludge removal and filtration device for a leaf filter according to claim 6, characterized in that: The support plate (9) is a cuboid with an open top, and several through holes are evenly distributed on the side wall of the support plate (9). The diameter of the through holes on each stainless steel filter plate (10) gradually decreases from the liquid inlet pipe (3) to the liquid outlet pipe (4). The support plate (8) and the sealing gasket (17) are both arranged in a square shape.

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