Filter plate structure of disc filter

Abstract

A filter plate structure of a disc filter relates to the technical field of disc filters and comprises a filter plate body filter surface, a filter cloth sealing pipe, a filter plate fixing block and a plate handle branch pipe, the filter cloth sealing pipe and the plate handle branch pipe are sequentially fixed at a plate handle of the filter plate body filter surface, and the filter plate fixing block is fixed outside the plate handle branch pipe. The two working surfaces of the filter surface of the filter plate main body are respectively parallel to the contour surfaces at the two ends of the filter plate fixing block, and the contour surface at any end of the filter plate fixing block can be attached to the fixing ring on the central shaft; the fixing mode of the filter plate assembly is changed, the stress direction of the filter plate assembly is changed to be perpendicular to the filter surface from the stress direction of a filter plate in the prior art to be parallel to the filter surface, the flatness of a whole disc formed after the filter plate assembly is assembled into the filter disc is guaranteed, the filter disc with the high flatness is more stable during operation, the cake discharging rate is high, and the filter plate assembly is convenient to assemble and disassemble. Rubbing of the filter cloth is avoided, and the service life of the filter cloth is prolonged.

Description

Technical Field

[0001] This invention relates to the field of disc filter technology, and particularly to a filter plate structure for a disc filter. Background Technology

[0002] As is generally known, disc filters are mainly used for the filtration and dewatering of aluminum hydroxide seed liquor in alumina plants in the non-ferrous metals industry, coal slime in the coal industry, and flotation concentrates in various mines. Disc filters use the suction action of a vacuum pump to form a filter cake on the filter cloth of the filter plate. The filtrate is discharged sequentially through the filter cloth, the inner cavity of the filter plate, and the flow channel of the central shaft, thus achieving the purpose of solid-liquid separation.

[0003] The filter disc of a disc filter is composed of multiple filter plates. The rotating discs form a filter cake within the tank. The cake is then removed from the tank, dried, and transferred to the cake discharge area, where it is removed by air blowing or a scraper. During the rotation process, the strength and flatness of the filter plates are crucial. Insufficient compressive strength can easily cause cracking or detachment; poor flatness will reduce dewatering efficiency. Existing disc filter plates and their fixing methods mainly fall into two categories: 1. As shown in the attached... Figure 1 As shown, a filtrate branch pipe A2 is set on the central shaft. The base of filter plate A1 has a groove containing an O-ring seal. After filter plate A1 is inserted into the filtrate branch pipe A2, the larger end of the filter plate is fixed in the radial direction of the filter plate by guide rails A3 fixed to the filter plate via pull rods 4 on both sides of the filter plate; 2. As shown in the attached... Figure 2 As shown, a hole is provided on the central shaft, and the filter plate B5 is inserted into the hole. There are protrusions 6 on both sides of the handle of the filter plate B5. The protrusions 6 are perpendicular to the filter surface of the filter plate B5. The screws 7 on both sides are pressed vertically on the protrusions 6 to fix the root of the filter plate B5. The top is fixed by the guide rail. Due to structural limitations, the above two fixing methods make it difficult to ensure that the filtration surfaces of all filter plates are on the same plane, and the overall flatness of the filter plate is difficult to control. Although the force direction of the fixed filter plates is parallel to the filtration surface, ensuring that the filter plates do not slide outward in the radial direction, when the filter plate rotates, the vacuum force of the filter cake is formed on both sides of the filter plate surface under the action of vacuum. Due to the impact force of the slurry in the tank disturbed by the rotating filter plate, under the action of the filter plate blowing or the scraper unloading the cake, the overall force of the filter plate is perpendicular to the filtration surface, which further aggravates the bending of the filter plate and affects the flatness of the filter plate. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a filter plate structure for a disc filter.

[0005] The technical solution adopted in this invention is: A filter plate structure for a disc filter includes a filter plate main body filter surface, a filter cloth sealing tube, a filter plate fixing block, and a plate handle branch pipe. The filter cloth sealing tube and the plate handle branch pipe are fixed sequentially at the plate handle of the filter plate main body filter surface. The filter plate fixing block is fixed to the outside of the plate handle branch pipe. The two working surfaces of the filter plate main body filter surface are respectively set parallel to the two end contour surfaces of the filter plate fixing block. The contour surface of either end of the filter plate fixing block can be fitted with the fixing ring on the central shaft.

[0006] Specifically, the center line of the plate handle branch pipe is aligned with that of the filtrate branch pipe B on the central shaft.

[0007] Specifically, a filter cloth is fitted into the branch tube of the filter plate handle, and the root of the filter cloth is fixed to the filter cloth sealing tube.

[0008] Specifically, the filter plate fixing block and the plate handle branch pipe are either integrally set or separately set. The two end contour surfaces are set as non-perforated planes or perforated planes with through holes on both sides of the two end contour surfaces. Whether it is integrally set or separately set, the filter plate fixing block can be pressed onto the outer end contour surface of the fixing ring using a pressure plate assembly or a bolt and nut assembly A. The pressure plate assembly includes a pressure plate and a set of bolt and nut assemblies B.

[0009] Specifically, the filter plate fixing block and the plate handle branch pipe are set as one piece. When the filter plate fixing block is a flat surface without holes, the two sides of the pressure plate are respectively pressed on the two sides of the outer contour surface of the two adjacent filter plate fixing blocks. The bolts of the bolt and nut assembly B pass through the through hole in the middle of the pressure plate and the round hole on the fixing ring in sequence and are then locked by the nut. When the filter plate fixing block is a perforated plane, the bolt and nut assembly A is used to press the filter plate fixing block onto the outer contour surface of the fixing ring. The bolt and nut assembly A includes two sets of matching bolts and nuts. The two bolts pass through the through holes on both sides of the contour surface of the filter plate fixing block and the round hole on the fixing ring, respectively, and are then locked by the nuts.

[0010] Specifically, when the filter plate fixing block and the plate handle branch pipe are set separately, the filter plate fixing block consists of a fixing block A and a fixing block B with a two-half structure. A keyway A is opened on the semi-circular groove at the center of the fixing block A or fixing block B, and a corresponding keyway B is opened on the contact surface of the plate handle branch pipe and the fixing block A or fixing block B and the plate handle branch pipe are connected by a key. When the filter plate fixing block is a flat surface without holes, the two sides of the pressure plate are respectively pressed on the two sides of the outer contour surface of the filter plate fixing blocks connected by keys. The bolts of the bolt and nut assembly B pass through the through hole in the middle of the pressure plate and the round hole on the fixing ring in sequence and are then locked by the nut. When the filter plate fixing block is a perforated plane, the two bolts of the bolt and nut assembly A pass through the through holes on both sides of fixing block A and fixing block B, and the round hole on the fixing ring, respectively, and are then locked by the nut.

[0011] Due to the adoption of the technical solution described above, the present invention has the following advantages: The filter plate structure of the disc filter described in this invention changes the fixing method of the filter plate assembly. The force direction is changed from being parallel to the filter surface in existing technology to being perpendicular to the filter surface. This ensures the flatness of the overall disc formed after the filter plate assembly is assembled. A high-flatness filter disc is more stable during operation and has a higher cake discharge rate, avoiding filter cloth abrasion and extending the filter cloth's service life. Furthermore, the filter plate assembly described in this invention is simple and convenient to disassemble. The outer contour surface of the filter plate fixing block is tightly fitted and fixedly connected to the fixing ring, resulting in high stability and better sealing of the entire filter disc. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the first existing disc filter plate fixing method in the background art.

[0013] Figure 2 This is a schematic diagram of the second existing disc filter plate fixing method in the background art.

[0014] Figure 3 This is a schematic diagram of the structure of the present invention.

[0015] Figure 4 This is a schematic diagram of the structure of the filter plate fixing block of the present invention, which is fixed by bolt and nut assembly A.

[0016] Figure 5 This is a schematic diagram of the structure of the filter plate fixing block of the present invention, which is fixed by a pressure plate.

[0017] Figure 6 This is a schematic diagram of the split structure of the filter plate fixing block of the present invention.

[0018] In the diagram: 1. Filter plate A; 2. Filtrate branch pipe A; 3. Guide rail A; 4. Pull rod; 5. Filter plate B; 6. Protrusion; 7. Screw; 8. Filter plate main body filter surface; 9. Filter cloth sealing tube; 10. Filter plate fixing block; 11. Plate handle branch pipe; 12. Fixing ring; 13. Filtrate branch pipe B; 14. Bolt and nut assembly A; 15. Pressure plate; 16. Bolt and nut assembly B; 17. Fixing block A; 18. Fixing block B. Detailed Implementation

[0019] The present invention will be further explained and described below with reference to the accompanying drawings and embodiments. However, this should not be construed as limiting the scope of protection of the present invention. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0020] Combined with appendix Figure 3-6The filter plate structure of the disc filter includes a filter plate main body filter surface 8, a filter cloth sealing tube 9, a filter plate fixing block 10, and a plate handle branch tube 11. The filter cloth sealing tube 9 and the plate handle branch tube 11 are fixed sequentially at the plate handle of the filter plate main body filter surface 8. A filter cloth is inserted into the plate handle branch tube 11, and the root of the filter cloth is fixed at the filter cloth sealing tube 9. The filter plate fixing block 10 is fixed to the outside of the plate handle branch tube 11. The plate handle branch tube 11 is aligned with the center line of the filtrate branch tube B13 on the central shaft. The two working surfaces of the filter plate main body filter surface 8 are parallel to the two end contour surfaces of the filter plate fixing block 10. The contour surface of either end of the filter plate fixing block 10 can be fitted with the fixing ring 12 on the central shaft.

[0021] Specifically, the filter plate fixing block 10 and the plate handle branch pipe 11 are either integrally set or separately set. The two end contour surfaces are set as non-perforated planes or perforated planes with through holes on both sides of the two end contour surfaces. Whether it is integrally set or separately set, the filter plate fixing block 10 can be pressed onto the outer end contour surface of the fixing ring 12 using a pressure plate assembly or a bolt and nut assembly A14. The pressure plate assembly includes a pressure plate 15 and a set of bolt and nut assemblies B16.

[0022] Specifically, the filter plate fixing block 10 and the plate handle branch pipe 11 are integrally set, and when the filter plate fixing block 10 is a flat surface without holes, the two sides of the pressure plate 15 are respectively pressed on the two sides of the outer contour surface of the two adjacent filter plate fixing blocks 10. The bolts of the bolt and nut assembly B16 pass through the through hole in the middle of the pressure plate 15 and the round hole on the fixing ring 12 in sequence, and are then locked by the nut. When the filter plate fixing block 10 is a plane with holes, the bolt and nut assembly A14 is used to press the filter plate fixing block 10 onto the outer contour surface of the fixing ring 12. The bolt and nut assembly A14 includes two sets of matching bolts and nuts. The two bolts pass through the through holes on both sides of the contour surface at both ends of the filter plate fixing block 10 and the round hole on the fixing ring 12, and are then locked by the nuts.

[0023] Specifically, when the filter plate fixing block 10 and the plate handle branch pipe 11 are set separately, the filter plate fixing block 10 is composed of a two-half structure fixing block A17 and fixing block B18. A keyway A is provided on the semi-circular groove at the center of fixing block A17 or fixing block B18, and a corresponding keyway B is provided on the contact surface of the plate handle branch pipe 11 and the plate handle branch pipe 11. The fixing block A17 or fixing block B18 is connected to the plate handle branch pipe 11 by a key. When the filter plate fixing block 10 is a flat surface without holes, the two sides of the pressure plate 15 are respectively pressed on the two sides of the outer contour surface of the filter plate fixing block 10 after the two adjacent blocks are connected by keys. The bolts of the bolt and nut assembly B16 pass through the through hole in the middle of the pressure plate 15 and the round hole on the fixing ring 12 in sequence, and are then locked by the nut. When the filter plate fixing block 10 is a perforated plane, the two bolts of the bolt and nut assembly A14 pass through the through holes on both sides of the fixing block A17, the fixing block B18, and the round hole on the fixing ring 12 in sequence, and are then locked by the nut.

[0024] In the filter plate structure of the disc filter described in this invention, during installation, the filter cloth is sleeved from the plate handle branch pipe 11 toward the filter plate main body filter surface 8. The small end of the filter cloth is extended outside the filter cloth sealing tube 9 and is tightly fixed to the outside of the filter cloth sealing tube 9 using a hose clamp or cable tie. The filter cloth completely covers the surface of the filter plate main body filter surface 8. The large end of the filter cloth is welded with a soldering iron or fixed with a filter cloth clamp. When the small end of the filter cloth is fixed to the outside of the filter cloth sealing tube 9, the filter cloth is not affected when the filter plate fixing block 10 is pressed onto the fixing ring 12 by the pressure plate 15 or the bolt and nut assembly A14. The filter plate structure of this invention does not distinguish between the front and back during installation. The plate handle branch pipe 11 is perpendicularly set and sealed to the filtrate branch pipe B13 set on the central shaft to form a filtrate channel for collecting filtrate. The inner end contour surface of the filter plate fixing block 10 is tightly fitted with the outer end contour surface of the fixing ring 12. When the filter plate fixing block 10 and the plate handle branch pipe 11 are integrally set, the filter plate fixing block 10 can be pressed onto the outer contour surface of the fixing ring 12 by the pressure plate assembly or the bolt and nut assembly A14; as shown in the attached Figure 4 As shown, the filter plate fixing block 10 is pressed onto the outer contour surface of the fixing ring 12 by the bolt and nut assembly A14. The two bolts of the bolt and nut assembly A14 pass through the through holes on both sides of the filter plate fixing block 10 and the round hole on the fixing ring 12 in sequence, and are then locked by the nut. As attached Figure 5 As shown, the filter plate fixing block 10 is pressed onto the outer contour surface of the fixing ring 12 by the pressure plate assembly. There is a gap between two adjacent filter plate fixing blocks 10. The two sides of the pressure plate 15 are respectively pressed onto the two sides of the outer contour surface of the two adjacent filter plate fixing blocks 10. The bolts of the bolt and nut assembly B16 pass through the through hole in the middle of the pressure plate 15, the gap between two adjacent filter plate fixing blocks 10, and the round hole on the fixing ring 12 in sequence, and are then locked by the nut. When the filter plate fixing block 10 and the plate handle support pipe 11 are set separately, as shown in the attached... Figure 6As shown, a keyway A is provided on the semi-circular groove at the center of the fixing block B18. The fixing block B18 and the plate handle branch pipe 11 are fixedly connected by the keyway. During installation, the filter plate fixing block 10 can be pressed onto the outer contour surface of the fixing ring 12 by the pressure plate assembly or the bolt and nut assembly A14. When the pressure plate assembly is used, there is a gap between two adjacent filter plate fixing blocks 10 connected by the key. The two sides of the pressure plate 15 are respectively pressed onto the two sides of the outer contour surface of the two adjacent filter plate fixing blocks 10. The bolts of the bolt and nut assembly B16 pass through the through hole in the middle of the pressure plate 15, the gap between the two adjacent filter plate fixing blocks 10, and the round hole on the fixing ring 12 in sequence, and are then locked by the nut. When the bolt and nut assembly A14 is used, the bolts of the bolt and nut assembly A14 pass through the through holes on both sides of the fixing block A17, the round hole on the fixing ring 12 in sequence, and are then locked by the nut. After the plate handle branch pipe 11 of the present invention is installed on multiple filtrate branch pipes B13 on the central shaft, a disc-shaped filter disc structure is formed after installation, and the filter surfaces 8 of multiple filter plates are all on the same plane.

[0025] The parts of this invention not described in detail are prior art.

[0026] The embodiments selected herein for the purpose of disclosing the inventive objectives are currently considered suitable; however, it should be understood that the invention is intended to include all variations and modifications of the embodiments that fall within the scope of this concept and invention.

Claims

1. A filter plate structure for a disc filter, comprising a filter plate body filter surface, a filter cloth sealing tube, a filter plate fixing block, and a plate handle branch tube; characterized in that: A filter cloth sealing tube and a plate handle branch tube are fixed sequentially at the plate handle of the filter plate main body filter surface. The filter plate fixing block is fixed to the outside of the plate handle branch tube. The two working surfaces of the filter plate main body filter surface are set parallel to the two end contour surfaces of the filter plate fixing block. The contour surface of either end of the filter plate fixing block can fit with the fixing ring on the central shaft.

2. The filter plate structure of the disc filter according to claim 1, characterized in that: The center line of the plate handle branch pipe coincides with that of the filtrate branch pipe B on the central shaft.

3. The filter plate structure of the disc filter according to claim 1, characterized in that: A filter cloth is fitted into the branch tube of the filter plate handle, and the root of the filter cloth is fixed to the filter cloth sealing tube.

4. The filter plate structure of the disc filter according to claim 1, characterized in that: The filter plate fixing block and the plate handle branch pipe are either integrally set or separately set. The two end contour surfaces are set as non-perforated planes or perforated planes with through holes on both sides of the two end contour surfaces. Whether it is integrally set or separately set, the filter plate fixing block can be pressed onto the outer end contour surface of the fixing ring using a pressure plate assembly or a bolt and nut assembly A. The pressure plate assembly includes a pressure plate and a set of bolt and nut assemblies B.

5. The filter plate structure of the disc filter according to claim 4, characterized in that: When the filter plate fixing block and the plate handle branch pipe are integrated, and the filter plate fixing block is a flat surface without holes, the two sides of the pressure plate are respectively pressed on the two sides of the outer contour surface of the two adjacent filter plate fixing blocks. The bolts of the bolt and nut assembly B pass through the through hole in the middle of the pressure plate and the round hole on the fixing ring in sequence, and are then locked by the nut. When the filter plate fixing block is a perforated plane, the bolt and nut assembly A is used to press the filter plate fixing block onto the outer contour surface of the fixing ring. The bolt and nut assembly A includes two sets of matching bolts and nuts. The two bolts pass through the through holes on both sides of the contour surface of the filter plate fixing block and the round hole on the fixing ring, respectively, and are then locked by the nuts.

6. The filter plate structure of the disc filter according to claim 4, characterized in that: When the filter plate fixing block and the plate handle branch pipe are set separately, the filter plate fixing block consists of a two-half structure fixing block A and fixing block B. A keyway A is opened on the semi-circular groove at the center of fixing block A or fixing block B, and a corresponding keyway B is opened on the contact surface of the plate handle branch pipe and the plate handle branch pipe. Fixing block A or fixing block B and plate handle branch pipe are connected by a key. When the filter plate fixing block is a flat surface without holes, the two sides of the pressure plate are respectively pressed on the two sides of the outer contour surface of the filter plate fixing blocks connected by keys. The bolts of the bolt and nut assembly B pass through the through hole in the middle of the pressure plate and the round hole on the fixing ring in sequence and are then locked by the nut. When the filter plate fixing block is a perforated plane, the two bolts of the bolt and nut assembly A pass through the through holes on both sides of fixing block A and fixing block B, and the round hole on the fixing ring, respectively, and are then locked by the nut.

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