Improved rotary wheel continuous filter press

Abstract

An improved rotary wheel type continuous filter press, including a feed end cover, a discharge end cover, a filter frame, a filter disc, a center shaft and a rotary wheel, the feed end cover is connected with a feed pipe, the discharge end cover is provided with a discharge valve, the outlet of the discharge valve is connected with a discharge pipe, the center of the filter disc is provided with a center hole, the filter frame is a thin-walled annular structure, the filter frame and the filter disc are alternately superimposed along the horizontal direction to form a superimposed body, the both ends of the superimposed body are filter frames, the feed end cover and the discharge end cover are respectively superimposed on the outer sides of the both ends of the superimposed body, the first end of the center shaft passes through all the filter frames, the center holes of all the filter discs and the center of the feed end cover, the second end of the center shaft is connected with a rotary driving device outside the superimposed body, and the center shaft is rotationally sealed with the feed end cover by mechanical sealing. The filter frame and the filter disc are directly disassembled from the side during maintenance, so that maintenance is facilitated.

Description

Technical Field

[0001] This utility model relates to the chemical industry, and more particularly to filtration and filter press equipment, especially an improved rotary continuous filtration and filter press. Background Technology

[0002] In the prior art, utility model patent CN208678543U discloses a high-efficiency rotary filter press, which uses dynamic filtration, with the filter cake constantly being renewed and kept under a thin layer of filter cake for filtration, greatly shortening the filtration time and significantly improving the filtration efficiency. It can filter slurries with very fine solid particle sizes and very difficult-to-filter viscous slurries. However, in the prior art, the filter discs and impellers of the rotary continuous filter press are arranged alternately, with the central axis in a vertical direction. The cylindrical filter discs are fixed inside the cylinder. If maintenance or replacement of the filter discs is required, it is necessary to disassemble them from the top or remove the cylinder before disassembling the filter discs, which is inconvenient for maintenance. Summary of the Invention

[0003] The purpose of this utility model is to provide an improved rotary continuous filter press, which solves the technical problem of inconvenient disassembly and maintenance of filter discs in the prior art.

[0004] This improved rotary continuous filter press includes a feed end cover, a discharge end cover, filter frames, filter discs, a central shaft, and a rotary wheel. The feed end cover is connected to a feed pipe, and the discharge end cover is equipped with a discharge valve. The outlet of the discharge valve is connected to the discharge pipe. The filter disc has a central hole. The filter frame is a thin-walled annular structure. The filter frames and filter discs are alternately stacked along the axial direction to form a composite body. The two ends of the composite body are filter frames. The feed end cover and discharge end cover are respectively stacked on the outer sides of the two ends of the composite body. The first end of the central shaft passes through all the filter frames and all the filter discs. The center hole of the disc and the center of the feed end cover, the second end of the central shaft is connected to the rotary drive device on the outside of the composite body, the number of the rotating wheels is the same as the number of filter frames, each rotating wheel includes a mounting sleeve, the mounting sleeve is fixedly set outside the central shaft and adjacent to the filter frame, the mounting sleeve is circumferentially provided with a rotating disc perpendicular to the axis of the central shaft, the rotating disc is provided with a first set of rotating blades on the side facing the feed end cover, the rotating disc is provided with a second set of rotating blades on the side facing the discharge end cover, the first set of rotating blades and the second set of rotating blades have opposite rotation directions.

[0005] Furthermore, both end faces of the filter frame are provided with annular sealing rings, which abut and seal with the filter disc, the feed end cover, or the discharge end cover. The feed end cover and the discharge end cover are connected by multiple studs and press all the filter discs and filter frames together.

[0006] Furthermore, the outer edges of both end faces of the filter frame are provided with raised limiting steps, and the two sides of the outer circle of the filter disc are respectively nested in the limiting steps of the adjacent filter frames.

[0007] Furthermore, both the first set of rotating blades and the second set of rotating blades are deployed along an Archimedean spiral.

[0008] Furthermore, the mounting sleeve is installed on the outside of the central shaft via a keyway, and a positioning sleeve is provided between adjacent mounting sleeves.

[0009] Furthermore, the filter disc is provided with a filtrate outlet pipe, which is connected to a filtrate outlet main pipe, and the filtrate outlet main pipe is provided with a filtrate discharge port.

[0010] Furthermore, the feed end cover is provided with a shaft sealing device, and the central shaft passes through the shaft sealing device.

[0011] Furthermore, it also includes an equipment frame, on which a support frame is fixedly mounted. The feed end cover is fixedly mounted on one side of the support frame. The rotary drive device includes a motor, a drive pulley, a transmission belt, and a driven pulley. The motor is fixedly mounted on the equipment frame. The output shaft of the motor is connected to the drive pulley. The drive pulley is connected to the driven pulley via the transmission belt. The second end of the central shaft passes through the support frame and is connected to the driven pulley.

[0012] Furthermore, the diameter of the driving pulley is smaller than the diameter of the driven pulley.

[0013] Compared with existing technologies, the advantages of this invention are positive and obvious. By stacking the filter frame and filter disc horizontally, this invention allows for easy disassembly of the filter frame and filter disc from the side during maintenance, facilitating maintenance of the filter disc. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the spiral disc of this utility model.

[0016] Figure 3 This is a side sectional view of the rotating wheel of this utility model.

[0017] Figure 4 This is a front view of the rotating wheel of this utility model.

[0018] The markings in the diagram are: 1. Discharge end cover; 2. Filter frame; 201. Limiting step; 3. Rotary wheel; 301. Mounting sleeve; 302. Rotating disc; 303. First set of rotating blades; 304. Second set of rotating blades; 4. Filter disc; 401. Filtrate outlet pipe; 5. Stud; 6. Feed end cover; 7. Shaft sealing device; 8. Support frame; 9. Passive pulley; 10. Drive belt; 11. Drive pulley; 12. Motor; 13. Central shaft; 14. Filtrate outlet main pipe; 15. Sealing ring; 16. Equipment frame; 17. Discharge valve; 18. Feed pipe; 19. Discharge pipe; 20. Filtrate discharge port; 21. Positioning sleeve. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention.

[0020] like Figures 1-4 As shown, an improved rotary continuous filter press of this utility model includes a feed end cover 6, a discharge end cover 1, a filter frame 2, a filter disc 4, a central shaft 13, and a rotary wheel 3. The feed end cover 6 is connected to a feed pipe 18. A discharge valve 17 is provided at the radial center of the discharge end cover 1, and the outlet of the discharge valve 17 is connected to a discharge pipe 19. A central hole is provided at the center of the filter disc 4. The filter frame 2 is a thin-walled annular structure. The filter frame 2 and the filter disc 4 are alternately stacked along the axial direction to form a composite body. The two ends of the composite body are filter frames 2. The feed end cover 6 and the discharge end cover 1 are respectively stacked on the outer sides of the two ends of the composite body. The first end of the central shaft 13 passes through the center of all the filter frames 2 and all the filter discs 4. The center of the core hole and the feed end cover 6, the second end of the central shaft 13 is connected to the rotary drive device on the outside of the composite body, the number of the rotating wheels 3 is the same as the number of filter frames 2, each rotating wheel 3 includes a mounting sleeve 301, the mounting sleeve 301 is fixedly set on the central shaft 13 at a position adjacent to the filter frame 2, the mounting sleeve 301 is circumferentially provided with a rotating disk 302 perpendicular to the axis of the central shaft 13, the rotating disk 302 is provided with a first set of rotating blades 303 on the side facing the feed end cover 6, the rotating disk 302 is provided with a second set of rotating blades 304 on the side facing the discharge end cover 1, the first set of rotating blades 303 and the second set of rotating blades 304 have opposite rotation directions.

[0021] Specifically, the filter frame 2 and filter disc 4 are alternately stacked, and the feed end cover 6 and discharge end cover 1 are set outside the filter frame 2 at both ends. The material is pushed by the pressure generated by the rotating wheel 3 in the space formed by the combination of filter frame 2, filter disc 4, feed end cover 6 and discharge end cover 1, and the material is filtered by the filter disc 4. The first set of rotating blades 303 and the second set of rotating blades 304 each include multiple evenly distributed blades. The opposite rotation direction of the first set of rotating blades 303 and the second set of rotating blades 304 means that when the central shaft 13 drives the rotating wheel 3 to rotate, if the first set of rotating blades 303 pushes the material in the outward direction, then the second set of rotating blades 304 pushes the material in the center direction.

[0022] Furthermore, both end faces of the filter frame 2 are provided with annular sealing rings 15, which abut and seal with the filter disc 4, the feed end cover 6, or the discharge end cover 1. The feed end cover 6 and the discharge end cover 1 are connected by multiple studs 5 and press all the filter discs 4 and the filter frame 2 together.

[0023] Specifically, the sealing ring 15 can improve the sealing effect and prevent leakage between the filter frame 2 and the filter disc 4, as well as between the filter frame 2 and the feed end cover 6 or the discharge end cover 1. The stud 5 can be set on the outside of the filter frame 2 and the filter disc 4. The feed end cover 6 and the discharge end cover 1 are connected by the stud 5 for easy disassembly and assembly. It can also apply a clamping force between the filter frame 2 and the filter disc 4, the discharge end cover 1, and the feed end cover 6, making the structure of the composite more stable. The filter frame 2, the filter disc 4, the discharge end cover 1, and the feed end cover 6 are sealed by the sealing ring 15.

[0024] Furthermore, the outer edges of both end faces of the filter frame 2 are provided with raised limiting steps 201, and the two sides of the outer circle of the filter disk 4 are respectively nested in the limiting steps 201 of the adjacent filter frame 2.

[0025] Specifically, the limiting step 201 is set to facilitate the stacking and installation of the filter frame 2 and the filter disc 4, and can prevent the filter disc 4 from coming out of the stack.

[0026] Furthermore, both the first set of rotating blades 303 and the second set of rotating blades 304 are deployed along an Archimedean spiral.

[0027] Specifically, the Archimedean spiral, also known as the constant velocity fall line, is the trajectory generated by a point moving away from a fixed point at a constant speed while rotating around that fixed point at a constant angular velocity. The blades of the first set of rotating blades 303 and the second set of rotating blades 304 unfold along the Archimedean spiral and can push and squeeze the material in the radial direction at a constant speed when the central shaft 13 rotates at a constant speed, so as to filter the material evenly and ensure that the central shaft 13 can operate smoothly.

[0028] Furthermore, the mounting sleeve 301 is mounted on the outside of the central shaft 13 via a keyway, and a positioning sleeve 21 is provided between adjacent mounting sleeves 301.

[0029] Specifically, the mounting sleeve 301 and the central shaft 13 are connected by a keyway, allowing for quick assembly and disassembly of the rotating wheel 3 from the side. The positioning sleeve 21 can fill the gaps between the mounting sleeves 301, so that the mounting sleeves 301 are distributed at the required intervals on both sides of the filter disc 4.

[0030] Furthermore, the filter disc 4 is provided with a filtrate outlet pipe 401, which is connected to the filtrate outlet main pipe 14, and the filtrate outlet main pipe 14 is provided with a filtrate discharge port 20.

[0031] Specifically, the filtrate after being filtered by the filter plate 4 flows out from the filtrate outlet pipe 401 and is collected in the filtrate outlet main pipe 14, and finally discharged from the filtrate discharge port 20.

[0032] Furthermore, the feed end cover 6 is provided with a shaft sealing device 7, and the central shaft 13 passes through the shaft sealing device 7.

[0033] Specifically, the shaft sealing device 7 can be a mechanical seal. The shaft sealing device 7 can seal the connection between the central shaft 13 and the feed end cover 6, preventing material from leaking from the connection between the central shaft 13 and the feed end cover 6.

[0034] Furthermore, it also includes an equipment frame 16, on which a support frame 8 is fixedly mounted. The feed end cover 6 is fixedly mounted on one side of the support frame 8. The rotary drive device includes a motor 12, a drive pulley 11, a transmission belt 10, and a driven pulley 9. The motor 12 is fixedly mounted on the equipment frame 16. The output shaft of the motor 12 is connected to the drive pulley 11. The drive pulley 11 is connected to the driven pulley 9 via the transmission belt 10. The second end of the central shaft 13 passes through the support frame 8 and is connected to the driven pulley 9.

[0035] Specifically, the rotary drive device is driven by a belt. If the filter pressure resistance is too high, the belt can slip, allowing the motor 12 to continue rotating and preventing the motor 12 from burning out.

[0036] Furthermore, the diameter of the driving pulley 11 is smaller than the diameter of the driven pulley 9.

[0037] Specifically, having a smaller diameter for the active pulley 11 than for the passive pulley 9 can increase the torque and thus improve the pressure of the filter press.

[0038] In use, the solid-liquid mixture is fed into the composite body located on one side of the feed end cover 6 through the feed pipe 18. The central shaft 13 drives the rotating wheel 3 to rotate. Under the action of the first set of rotating blades 303 of the first rotating wheel 3, the material is first squeezed outward in the direction of the outer periphery between the rotating disk 302 and the feed end cover 6. Then, the material passes through the gap between the rotating disk 302 and the filter frame 2. Since the second set of rotating blades 304 has the opposite direction to the first set of rotating blades 303, the second set of rotating blades 304 squeezes the material in the direction of the center between the rotating disk 302 and the first filter disk 4. This process is repeated to transport the material along the gap between the rotating disk 302 and the filter disk 4 to the discharge end cover 1, forming a filter cake that is discharged from the discharge pipe 19. When the material passes through the filter disk 4, the pressure exerted by the first set of rotating blades 303 and the second set of rotating blades 304 on the material causes the filter disk 4 to filter the material.

[0039] When the filter disc 4 needs maintenance or replacement, the discharge end cover 1 can be removed from the side, and then the filter frame 2, the rotary wheel 3, and the filter disc 4 can be removed one by one for maintenance, which is convenient and quick.

Claims

1. An improved rotary wheel continuous filter press, characterized by: The system includes a feed end cap (6), a discharge end cap (1), a filter frame (2), a filter disc (4), a central shaft (13), and a rotating wheel (3). The feed end cap (6) is connected to the feed pipe (18). A discharge valve (17) is provided at the radial center of the discharge end cap (1), and the outlet of the discharge valve (17) is connected to the discharge pipe (19). A central hole is provided at the center of the filter disc (4). The filter frame (2) is a ring structure. The filter frame (2) and the filter disc (4) are alternately stacked along the axial direction to form a composite body. The two ends of the composite body are filter frames (2). The feed end cap (6) and the discharge end cap (1) are respectively stacked on the outer sides of the two ends of the composite body. The first end of the central shaft (13) passes through the central holes of all the filter frames (2), all the filter discs (4), and the feed end cap (6). The second end of the central shaft (13) is connected to the rotary drive device on the outside of the composite body. The number of the rotating wheels (3) is the same as the number of the filter frames (2). Each rotating wheel (3) includes a mounting sleeve (301). The mounting sleeve (301) is fixedly set outside the central shaft (13) and adjacent to the filter frame (2). The mounting sleeve (301) is circumferentially provided with a rotating disk (302) perpendicular to the axis of the central shaft (13). The rotating disk (302) is provided with a first set of rotating blades (303) on the side facing the feed end cover (6). The rotating disk (302) is provided with a second set of rotating blades (304) on the side facing the discharge end cover (1). The first set of rotating blades (303) and the second set of rotating blades (304) have opposite rotation directions.

2. The improved rotary continuous filter press as described in claim 1, characterized in that: Both ends of the filter frame (2) are provided with annular sealing rings (15). The sealing rings (15) abut against the filter disc (4), the feed end cover (6), or the discharge end cover (1) for sealing. The feed end cover (6) and the discharge end cover (1) are connected by multiple studs (5) and press all the filter discs (4) and filter frame (2).

3. The improved rotary wheel continuous filter press of claim 1, wherein: The outer edges of both end faces of the filter frame (2) are provided with raised limiting steps (201), and the outer circles of the filter disc (4) are respectively nested in the limiting steps (201) of the adjacent filter frame (2).

4. The improved rotary wheel continuous filter press of claim 1, wherein: The first set of rotating blades (303) and the second set of rotating blades (304) are both deployed along the Archimedes spiral.

5. The improved rotary wheel continuous filter press of claim 1, wherein: The mounting sleeve (301) is installed outside the central shaft (13) through a keyway, and a positioning sleeve (21) is provided between adjacent mounting sleeves (301).

6. The improved rotary wheel continuous filter press of claim 1, wherein: The filter disc (4) is provided with a filtrate outlet pipe (401), which is connected to the filtrate outlet main pipe (14), and the filtrate outlet main pipe (14) is provided with a filtrate discharge port (20).

7. The improved rotary wheel continuous filter press of claim 1, wherein: The feed end cover (6) is provided with a shaft sealing device (7), and the central shaft (13) passes through the shaft sealing device (7).

8. The improved rotary continuous filter press as described in claim 1, characterized in that: It also includes an equipment frame (16), on which a support frame (8) is fixedly installed. The feed end cover (6) is fixedly installed on one side of the support frame (8). The rotary drive device includes a motor (12), a drive pulley (11), a transmission belt (10), and a driven pulley (9). The motor (12) is fixedly installed on the equipment frame (16). The output shaft of the motor (12) is connected to the drive pulley (11). The drive pulley (11) is connected to the driven pulley (9) via the transmission belt (10). The second end of the central shaft (13) passes through the support frame (8) and is connected to the driven pulley (9).

9. The improved rotary continuous filter press as described in claim 8, characterized in that: The diameter of the active pulley (11) is smaller than the diameter of the passive pulley (9).

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