Device for filtering fiber impurities in printing and dyeing wastewater

Abstract

The invention relates to a device for filtering fiber impurities in printing and dyeing wastewater, and effectively solves the problem that impurities blocked in a sewage filter screen are not easy to backflush out. According to the technical scheme, the filtering device comprises a cylindrical shell and a filtering assembly installed in the shell, the filtering assembly comprises a horizontal upper disc and a horizontal lower disc, the upper disc and the lower disc are coaxially arranged, a plurality of net wires are evenly distributed between the upper disc and the lower disc in the circumferential direction, the net wires define a cylindrical filtering net between the two discs, and the distance between the net wires and the two discs is fixed. The device further comprises a tensioning device located below the lower disc, the tensioning device tensions the net wires, the upper disc rotates, the included angle between the net wires and the vertical direction can be changed, the larger the included angle is, the smaller the distance between the net wires is, and on the contrary, the smaller the included angle is, the larger the distance between the net wires is. The distance between the net wires can be increased during back flushing of the net wires, so that impurities mingled in the net wires can be easily flushed out, and the back flushing effect is improved.

Description

Technical Field

[0001] The invention relates to the field of environmental protection equipment, in particular to a device for filtering fiber impurities in printing and dyeing wastewater. Background Art

[0002] Printing and dyeing wastewater contains solid waste such as cotton yarn, fiber, and impurities, which need to be filtered during treatment. During filtration, solid impurities will adhere to the water-facing surface of the filter, and some impurities will be stuck in the filter. Backflushing is a commonly used filter cleaning method. For example, the invention patent with application number: CN201610256887.X provides a backflushing filter device that cleans by regular backflushing. The backflushing method can generally wash away impurities on the surface of the filter, but some impurities that are stuck tightly in the filter cannot be flushed out, resulting in poor backflushing effect. Summary of the Invention

[0003] Aiming at the problem that impurities stuck in a sewage filter are not easy to be backwashed out, the present invention provides a device for filtering fiber impurities in printing and dyeing wastewater.

[0004] The technical solution includes a cylindrical shell and a filter assembly installed in the shell, a water inlet and a slag discharge port are provided on the side wall of the shell, a water outlet is provided at the lower end of the shell, the filter assembly includes a horizontal upper disc and a lower disc, the upper disc and the lower disc are coaxially arranged, the lower disc is fixedly mounted on the lower end of the shell via a vertical axis, the upper disc is rotatably mounted on the upper end of the shell via a vertical rotating shaft and a bearing, a plurality of mesh wires are evenly distributed on the circumference between the upper disc and the lower disc, each mesh wire is tightly supported by the upper disc and the lower disc, the outer wall of the lower disc is sealed with the inner wall of the shell via a sealing ring, the water outlet is located below the lower disc, and a water trough is provided on the surface of the lower disc; it also includes a position The tensioning device below the lower disc includes a sliding sleeve that is slidably inserted into the vertical shaft, an inner conical sleeve is fixed at the lower end of the sliding sleeve, a conical block located above the inner conical sleeve is slidably inserted into the sliding sleeve, and a clamping nut located above the conical block is screwed onto the sliding sleeve via a thread. Under the action of the clamping nut, the conical outer wall of the conical block can be pressed against the conical inner wall of the inner conical sleeve, and a first compression spring is installed between the lower disc and the sliding sleeve; first through holes are evenly distributed on the circumference of the lower disc, the same number as the number of mesh wires, and the lower ends of the mesh wires pass through the first through holes one by one, and then are clamped between the inner conical sleeve and the conical block, and the mesh wires are tensioned under the action of the first compression spring.

[0005] The upper end of each mesh wire is fixed on the upper disc.

[0006] The upper circumference of the upper disc is uniformly distributed with second through holes equal in number to the mesh wires. The diameter of the distribution circle of the second through holes is equal to that of the first through holes. Every two adjacent mesh wires are formed by folding and winding the same steel wire.

[0007] A horizontal rubber disc is provided between the lower disc and the tensioning device, and a second compression spring is installed between the rubber disc and the lower disc. Under the downward force of the second compression spring, the outer wall of the rubber disc tightens the mesh wire, and a first water hole is provided on the rubber disc.

[0008] A plurality of vertical guide rods are evenly distributed on the circumference of the rubber disc, and the upper end of each guide rod is slidably penetrated on the lower disc.

[0009] A support tube located inside the mesh is provided between the upper and lower discs. The upper end of the support tube is closed and the lower end is open. The lower end of the support tube is fixed to the lower disc. The side wall of the support tube is densely covered with second water holes. The mesh is attached to the outer wall of the support tube to support the mesh.

[0010] The lower end of the rotating shaft is fixed to the upper end of the supporting cylinder, the upper disc is installed on the rotating shaft via a bearing, and a plurality of supporting balls are arranged between the upper end of the supporting cylinder and the upper disc.

[0011] The openings of the first through hole and the second through hole are both provided with rounded corners.

[0012] The lower end of the inner conical sleeve is provided with a rope threading groove, and the lower end of the mesh wire passes through between the inner conical sleeve and the conical block and then passes out from the rope threading groove.

[0013] A first gear is coaxially fixed to the upper surface of the upper disc, the first gear is meshed with a second gear, and the second gear is connected to a driving motor located outside the housing via a transmission shaft.

[0014] The present invention can change the spacing between the mesh wires by changing the mesh wire inclination, so that the mesh wires can be filtered with a larger inclination and smaller spacing, and backflushed with a smaller inclination and larger spacing, thereby making it easy to flush out impurities contained in the mesh wires and improving the backflushing effect; in addition, by adjusting the mesh wire inclination, the filtering accuracy of the filter screen can be adjusted within a certain range, so that the device can more flexibly adapt to the filtering needs of solid impurities of different particle sizes within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front sectional view of the present invention.

[0016] Figure 2 It is the front view of the filter assembly of the present invention.

[0017] Figure 3 It is a three-dimensional diagram of the filter assembly of the present invention.

[0018] Figure 4 A top cross-sectional view of the filter assembly.

[0019] Figure 5 for Figure 1 Enlarged view of position A in the middle.

[0020] Figure 6 Schematic diagram of the change in mesh spacing; the line of sight in the figure represents the mesh spacing in the vertical state, and the dotted line represents the mesh spacing in the inclined state. DETAILED DESCRIPTION

[0021] like Figures 1 to 5 As shown, the present invention includes a cylindrical shell 1 and a filter assembly installed in the shell 1. The side wall of the shell 1 is provided with a water inlet 2 and a slag outlet 3. The lower end of the shell 1 is provided with a water outlet 4. The filter assembly includes a horizontal upper disc 5 and a lower disc 6. The upper disc 5 and the lower disc 6 are coaxially arranged. The lower disc 6 is fixedly mounted on the lower end of the shell 1 through a vertical shaft 7. The upper disc 5 is rotatably mounted on the upper end of the shell 1 through a vertical rotating shaft 8 and a bearing 9. A plurality of mesh wires 10 are evenly distributed on the circumference between the upper disc 5 and the lower disc 6. Each mesh wire 10 is covered by the upper disc 5 and the lower disc 6 are held tightly together, and the mesh 10 is surrounded by a cylindrical filter with a fixed spacing between the two discs. The outer wall of the lower disc 6 and the inner wall of the shell 1 are sealed by a sealing ring. The water outlet 4 is located below the lower disc 6. A water trough 11 is opened on the surface of the lower disc 6. The sewage enters the shell from the water inlet 2 and enters the filter screen composed of the mesh 10, then passes through the lower disc 6 through the water trough 11 and is finally discharged from the water outlet 4. The solid impurities in the sewage are intercepted by the filter screen; the upper disc 5 rotates to change the angle between the mesh 10 and the vertical direction, such as Figure 6 As shown, the larger the angle, the smaller the spacing between the mesh wires 10. Conversely, the smaller the angle, the larger the spacing between the mesh wires 10. During filtration, the mesh wires 10 are tilted at a larger angle. During backflushing, the upper disc 5 rotates to adjust the mesh wires 10 to an inclined or vertical shape with a smaller angle. The spacing between the mesh wires 10 is increased, and impurities stuck between the mesh wires 10 can be easily flushed out. Also includes a tensioning device located below the lower disc 6, such as Figure 5 As shown, the tensioning device includes a sliding sleeve 12 that is slidably mounted on the vertical shaft 7. An inner tapered sleeve 13 is fixed to the lower end of the sliding sleeve 12. A tapered block 14 is slidably mounted on the sliding sleeve 12 and is located above the inner tapered sleeve 13. A compression nut 15 is threadedly mounted on the sliding sleeve 12 and is located above the tapered block 14. Under the action of the compression nut 15, the tapered outer wall of the tapered block 14 can be pressed against the tapered inner wall of the inner tapered sleeve 13. A first compression spring 16 is installed between the lower disc 6 and the sliding sleeve 12. The lower disc 6 is evenly distributed on the circumference with the same number of first through holes 17 as the number of mesh wires 10. The lower ends of the mesh wires 10 pass through the first through holes 17 one by one, and are then placed between the inner wall of the inner conical sleeve 13 and the outer wall of the conical block 14. The conical block 14 and the inner conical sleeve 13 are then pressed tightly by the compression nut 15. The lower ends of the mesh wires 10 are clamped between the inner conical sleeve 13 and the conical block 14, and the mesh wires 10 are tensioned under the action of the first compression spring 16. The mesh wires 10 below the lower disc 6 are distributed in a conical shape with the upper part larger and the lower part smaller.

[0022] The upper end of each mesh wire 10 is fixed on the upper disc 5 . The mesh wire 10 can be fixed by welding, tying, clamping, etc. to ensure that the upper end of the mesh wire 10 can rotate synchronously with the upper disc 5 .

[0023] The upper circumference of the upper disc 5 is evenly distributed with second through holes 18, the number of which is equal to that of the mesh wires 10. The distribution circle diameter of the second through holes 18 is equal to that of the first through holes 17. Every two adjacent mesh wires 10 are formed by folding and winding the same steel wire. Specifically, one end of the steel wire passes through a first through hole 17 from bottom to top, then passes through a second through hole 18 from bottom to top, then turns back and passes through the adjacent second through hole 18 from top to bottom, and then passes through the adjacent first through hole 17 from top to bottom, thereby forming two parallel mesh wires 10 between the two discs, and both ends of the steel wire are clamped between the inner conical sleeve 13 and the conical block 14; this meshing method does not require fixing the upper end of the mesh wire 10, reduces the difficulty of the manufacturing process, and avoids the risk of the upper end of the mesh wire 10 being broken due to a loose fixing point.

[0024] A horizontal rubber disc 19 is provided between the lower disc 6 and the tensioning device, and a second compression spring 20 is installed between the rubber disc 19 and the lower disc 6. Under the downward force of the second compression spring 20, the outer wall of the rubber disc 19 tightens the mesh 10. The tensioning unit uniformly tensions all the meshes 10, and it is easy for individual meshes 10 to have insufficient tension. The elasticity of the rubber disc 19 enables it to compensate for the tension of the meshes 10 with insufficient tension. In order to avoid water blocking by the rubber disc 19, a first water hole 21 is opened on the rubber disc 19.

[0025] The rubber disc 19 is evenly distributed with a plurality of vertical guide rods 22 on its circumference. The upper end of each guide rod 22 is slidably passed through the lower disc 6. The plurality of guide rods 22 guide and limit the rubber disc 19 to keep the rubber disc 19 in a horizontal state.

[0026] A support tube 23 located inside the mesh 10 is provided between the upper disc 5 and the lower disc 6. The upper end of the support tube 23 is closed and the lower end is open. The lower end of the support tube 23 is fixed to the lower disc 6. The side wall of the support tube 23 is densely covered with second water holes 24. The mesh 10 is attached to the outer wall of the support tube 23 to support the mesh 10.

[0027] The lower end of the rotating shaft 8 is fixed to the upper end of the support tube 23, and the upper disc 5 is installed on the rotating shaft 8 via the bearing 9. A plurality of supporting balls 25 are installed between the upper end of the support tube 23 and the upper disc 5. The supporting balls 25 can support the upper disc 5 to keep the upper disc 5 level.

[0028] The openings of the first through hole 17 and the second through hole 18 are both provided with rounded corners to avoid cutting the mesh wire 10 .

[0029] The lower end of the inner conical sleeve 13 is provided with a rope threading groove 26. The lower end of the mesh 10 passes through between the inner conical sleeve 13 and the conical block 14 and then passes through the rope threading groove 26, so that the mesh 10 can be tightened. When the conical block 14 is pressed, it can be pressed twice. First, the initial pressing is performed, and the mesh 10 can be pulled with force. At this time, the loose mesh 10 can be tightened one by one, and then the conical block 14 is completely pressed, and the first compression spring 16 is released; then the mesh 10 below the inner conical sleeve 13 can be sorted, tied or cut off.

[0030] A first gear 27 is coaxially fixed to the upper surface of the upper disc 5. The first gear 27 is meshed with a second gear 28. The second gear 28 is connected to a drive motor 29 located outside the housing 1 via a transmission shaft. The drive motor 29 drives the upper disc 5 to rotate through a gear set.

[0031] During filtration, the present invention has the slag discharge port 3 closed and the mesh 10 working in an inclined state. The greater the inclination, the smaller the spacing between the meshes 10. The sewage enters the housing 1 from the water inlet 2, then passes through the filter screen composed of the mesh 10 and the second water hole 24 on the support tube 23 to enter the support tube 23, then flows through the water trough 11 on the lower disc 6 to the bottom of the lower disc 6, and finally is discharged from the water outlet 4. The impurities are intercepted by the filter screen.

[0032] During backflushing, the upper disc 5 is rotated to reduce the inclination of the mesh 10 or make it vertical, thereby increasing the spacing between the meshes 10. Then the water inlet 2 is closed and the slag discharge port 3 is opened. The backflushing water enters the outer shell 1 from the water outlet 4, passes through the water trough 11 on the lower disc 6, enters the support cylinder 23, and then flows out of the support cylinder 23 through the second water hole 24 and the filter screen, and is finally discharged from the slag discharge port 3. Since the spacing between the meshes 10 is increased compared to that during filtration, impurities stuck between the meshes 10 can be easily flushed out, thereby improving the backflushing effect.

[0033] When the inclination of the mesh 10 becomes larger, the length of the mesh 10 between the upper disc 5 and the lower disc 6 becomes longer, the tensioning device moves upward, and the first compression spring 16 is compressed. When the inclination of the mesh 10 becomes smaller, the length of the mesh 10 between the upper disc 5 and the lower disc 6 becomes smaller, and the tensioning device moves downward under the action of the first compression spring 16, so that the mesh 10 can always be in a tensioned state.

[0034] The present invention can increase the mesh spacing during the recoil of the mesh, so that impurities contained in the mesh can be easily flushed out, thereby improving the recoil effect.

Claims

1. A device for filtering fiber impurities in printing and dyeing wastewater, comprising a cylindrical shell (1) and a filter assembly mounted in the shell (1), wherein the side wall of the shell (1) is provided with a water inlet (2) and a slag outlet (3), and the lower end of the shell (1) is provided with a water outlet (4), characterized in that: The filter assembly includes a horizontal upper disc (5) and a lower disc (6), the upper disc (5) and the lower disc (6) are coaxially arranged, the lower disc (6) is fixedly mounted on the lower end of the shell (1) via a vertical shaft (7), the upper disc (5) is rotatably mounted on the upper end of the shell (1) via a vertical rotating shaft (8) and a bearing (9), a plurality of mesh wires (10) are evenly distributed on the circumference between the upper disc (5) and the lower disc (6), each mesh wire (10) is tightened by the upper disc (5) and the lower disc (6), the outer wall of the lower disc (6) and the inner wall of the shell (1) are sealed by a sealing ring, the water outlet (4) is located below the lower disc (6), and a water groove (11) is opened on the disc surface of the lower disc (6); and a tensioning device is also included below the lower disc (6), the tensioning device includes a sliding sleeve (12) slidingly penetrated on the vertical shaft (7) ), an inner conical sleeve (13) is fixed to the lower end of the sliding sleeve (12), and a conical block (14) located above the inner conical sleeve (13) is slidably passed through the sliding sleeve (12), and a clamping nut (15) located above the conical block (14) is screwed on the sliding sleeve (12). Under the action of the clamping nut (15), the conical outer wall of the conical block (14) can be pressed against the conical inner wall of the inner conical sleeve (13), and a first compression spring (16) is installed between the lower disc (6) and the sliding sleeve (12); the upper circumference of the lower disc (6) is uniformly distributed with first through holes (17) of the same number as the number of mesh wires (10), and the lower ends of the mesh wires (10) pass through the first through holes (17) one by one, and are then clamped between the inner conical sleeve (13) and the conical block (14), and the mesh wires (10) are tensioned under the action of the first compression spring (16).

2. The device for filtering fiber impurities in printing and dyeing wastewater according to claim 1, characterized in that: The upper end of each mesh wire (10) is fixed on the upper disc (5).

3. The device for filtering fiber impurities in printing and dyeing wastewater according to claim 1, characterized in that: The upper circumference of the upper disc (5) is uniformly distributed with second through holes (18) equal in number to the mesh wires (10), the distribution circle diameters of the second through holes (18) and the first through holes (17) are equal, and every two adjacent mesh wires (10) are formed by folding and winding the same steel wire.

4. The device for filtering fiber impurities in printing and dyeing wastewater according to claim 1, characterized in that: A horizontal rubber disc (19) is provided between the lower disc (6) and the tensioning device, and a second compression spring (20) is installed between the rubber disc (19) and the lower disc (6). Under the downward force of the second compression spring (20), the outer wall of the rubber disc (19) tightens the mesh (10), and a first water hole (21) is opened on the rubber disc (19).

5. The device for filtering fiber impurities in printing and dyeing wastewater according to claim 4, characterized in that: A plurality of vertical guide rods (22) are evenly distributed on the circumference of the rubber disc (19), and the upper end of each guide rod (22) is slidably mounted on the lower disc (6).

6. The device for filtering fiber impurities in printing and dyeing wastewater according to claim 1, characterized in that: A support tube (23) is provided between the upper disc (5) and the lower disc (6) and is located inside the mesh (10). The upper end of the support tube (23) is closed and the lower end is open. The lower end of the support tube (23) is fixed to the lower disc (6). The side wall of the support tube (23) is densely covered with second water holes (24). The mesh (10) is attached to the outer wall of the support tube (23) to support the mesh (10).

7. The device for filtering fiber impurities in printing and dyeing wastewater according to claim 1, characterized in that: The lower end of the rotating shaft (8) is fixed to the upper end of the supporting cylinder (23), the upper disc (5) is mounted on the rotating shaft (8) via the bearing (9), and a plurality of supporting balls (25) are installed between the upper end of the supporting cylinder (23) and the upper disc (5).

8. The device for filtering fiber impurities in printing and dyeing wastewater according to claim 1, characterized in that: The openings of the first through hole (17) and the second through hole (18) are both provided with rounded corners.

9. The device for filtering fiber impurities in printing and dyeing wastewater according to claim 1, characterized in that: The lower end of the inner conical sleeve (13) is provided with a rope threading groove (26), and the lower end of the mesh (10) passes through between the inner conical sleeve (13) and the conical block (14) and then passes out from the rope threading groove (26).

10. The device for filtering fiber impurities in printing and dyeing wastewater according to claim 1, characterized in that: A first gear (27) is coaxially fixed to the upper surface of the upper disc (5), the first gear (27) is meshed with a second gear (28), and the second gear (28) is connected to a drive motor (29) located outside the housing (1) via a transmission shaft.

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