A filtering device for fiber impurities in printing and dyeing wastewater

Abstract

The present application relates to a kind of filtering devices of fiber impurities in printing and dyeing wastewater, effectively solve the problem that the impurities jammed in sewage filter screen are not easy to be backflushed out;The technical solution includes cylindrical shell and filter assembly installed in the shell, the filter assembly includes horizontal upper disc and lower disc, the upper disc and lower disc are coaxially arranged, and a plurality of mesh wires are uniformly distributed between the upper disc and lower disc, the mesh wire forms a fixed-spacing cylindrical filter screen between the two discs, and it further includes a tensioning device located below the lower disc, the tensioning device tensions the mesh wire, the upper disc rotates, and the included angle between the mesh wire and the vertical direction can be changed, the larger the included angle, the smaller the spacing between the mesh wires, and vice versa, the smaller the included angle, the larger the spacing between the mesh wires;The present application can increase the spacing between the mesh wires during backflushing, so that the impurities trapped in the mesh wire can be easily flushed out, and the backflushing effect is improved.

Description

Technical Field

[0001] This invention relates to the field of environmental protection equipment, specifically a filtration device for fibrous impurities in dyeing and printing wastewater. Background Technology

[0002] Dyeing and printing wastewater contains solid waste such as cotton yarn, fibers, and impurities. Filtration is required during treatment. During filtration, solid impurities adhere to the water-facing surface of the filter screen, and some impurities become stuck inside the screen. Backwashing is a common method for cleaning filter screens. For example, the invention patent application number CN201610256887.X provides a backwashing filter device that cleans the screen through periodic backwashing. Backwashing can generally remove impurities from the surface of the filter screen, but some tightly stuck impurities cannot be flushed out, resulting in poor backwashing effect. Summary of the Invention

[0003] To address the problem that impurities stuck in the wastewater filter screen are not easily backwashed out, this invention provides a filtration device for fibrous impurities in dyeing and printing wastewater.

[0004] The technical solution includes a cylindrical outer shell and a filter assembly installed inside the shell. The outer shell has an inlet and a slag outlet on its side wall, and an outlet at its lower end. The filter assembly includes a horizontal upper and lower disc, coaxially arranged. The lower disc is fixed to the lower end of the shell via a vertical shaft, while the upper disc is rotatably mounted to the upper end of the shell via a vertical shaft and a bearing. Several mesh wires are evenly distributed around the circumference of the upper and lower discs, each wire being held taut by the upper and lower discs. The outer wall of the lower disc is sealed to the inner wall of the shell via a sealing ring. The outlet is located below the lower disc, and a water-passing groove is formed on the surface of the lower disc. It also includes a position... The tensioning device located below the lower disc includes a sliding sleeve that slides along a vertical shaft. An inner conical sleeve is fixed to the lower end of the sliding sleeve. A conical block located above the inner conical sleeve slides along the sliding sleeve. A clamping nut located above the conical block is screwed onto the sliding sleeve via threads. 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. A first compression spring is installed between the lower disc and the sliding sleeve. The lower disc has a number of first through holes evenly distributed around its circumference, the same number as the number of mesh wires. The lower ends of the mesh wires pass through the first through holes one by one and are then clamped between the inner conical sleeve and the conical block. The mesh wires are tensioned under the action of the first compression spring.

[0005] The upper end of each of the aforementioned wires is fixed to the upper disc.

[0006] The upper disc has a number of second through holes evenly distributed around its circumference, equal to the number of mesh wires. The diameter of the distribution circle of the second through holes is equal to that of the first through holes. Each pair of adjacent mesh wires is formed by folding and winding the same steel wire back and forth.

[0007] A horizontal rubber disc is provided between the lower disc and the tensioning device. 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. A first water passage hole is opened on the rubber disc.

[0008] The rubber disc has multiple vertical guide rods evenly distributed around its circumference, and the upper end of each guide rod slides through the lower disc.

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

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

[0011] Both the first and second through holes have rounded corners at their openings.

[0012] The lower end of the inner conical sleeve has a rope-threading groove, and the lower end of the mesh wire passes between the inner conical sleeve and the conical block and then exits through the rope-threading groove.

[0013] The upper surface of the upper disk is coaxially fixed with a first gear, which meshes with a second gear. The second gear is connected to a drive motor located outside the housing via a transmission shaft.

[0014] This invention changes the spacing between the mesh wires by varying their inclination. This allows the mesh wires to filter with a larger inclination and a smaller spacing, and to backwash with a smaller inclination and a larger spacing. This makes it easier to flush out impurities trapped within the mesh wires, improving the backwashing effect. In addition, by adjusting the inclination of the mesh wires, the filtration accuracy of the filter can be adjusted within a certain range, allowing the device to more flexibly adapt to the filtration needs of solid impurities of different particle sizes. Attached Figure Description

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

[0016] Figure 2 This is the front view of the filtering component of the present invention.

[0017] Figure 3 This is a perspective view of the filter component of the present invention.

[0018] Figure 4 This is a top sectional view of the filter component.

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

[0020] Figure 6 This is a schematic diagram showing the variation in wire spacing; the lines of sight represent the wire spacing in the vertical state, and the dashed lines represent the wire spacing in the inclined state. Detailed Implementation

[0021] like Figures 1 to 5 As shown, the present invention includes a cylindrical outer shell 1 and a filter assembly installed inside the outer shell 1. The outer shell 1 has an inlet 2 and a slag outlet 3 on its side wall, and an outlet 4 at its lower end. The filter assembly includes a horizontal upper disc 5 and a lower disc 6, which are coaxially arranged. The lower disc 6 is fixedly installed at the lower end of the outer shell 1 via a vertical shaft 7. The upper disc 5 is rotatably installed at the upper end of the outer shell 1 via a vertical rotating shaft 8 and a bearing 9. A plurality of mesh wires 10 are evenly distributed around the circumference between the upper disc 5 and the lower disc 6. Each mesh wire 10 is supported by the upper disc. The upper disc 5 and the lower disc 6 are tightly supported, and the mesh wires 10 form a cylindrical filter screen with a fixed spacing between the two discs. The outer wall of the lower disc 6 is sealed to the inner wall of the outer shell 1 by a sealing ring. The outlet 4 is located below the lower disc 6. A water groove 11 is opened on the surface of the lower disc 6. Sewage enters the shell from the inlet 2, passes through the filter screen formed by the mesh wires 10, enters the filter screen, then passes through the water groove 11 and through the lower disc 6, and finally exits from the outlet 4. Solid impurities in the sewage are intercepted by the filter screen. The upper disc 5 can rotate to change the angle between the mesh wires 10 and the vertical direction, such as... Figure 6 As shown, the larger the included angle, the smaller the spacing between the mesh wires 10; conversely, the smaller the included angle, the larger the spacing between the mesh wires 10. During filtration, the mesh wires 10 are tilted at a larger included angle. During backwashing, the upper disc 5 rotates to adjust the mesh wires 10 to tilt at a smaller included angle or vertically, increasing the spacing between the mesh wires 10, and allowing impurities stuck between the mesh wires 10 to be easily flushed out.

[0022] It 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 slides through the vertical shaft 7. An inner conical sleeve 13 is fixed at the lower end of the sliding sleeve 12. A conical block 14 located above the inner conical sleeve 13 slides through the sliding sleeve 12. A clamping nut 15 located above the conical block 14 is screwed onto 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. A first compression spring 16 is installed between the lower disc 6 and the sliding sleeve 12. The lower disc 6 has a number of first through holes 17 evenly distributed around its circumference, the same number as the number of wire mesh 10. The lower ends of the wire mesh 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 together by the clamping nut 15. The lower ends of the wire mesh 10 are clamped between the inner conical sleeve 13 and the conical block 14, and the wire mesh 10 is tensioned under the action of the first compression spring 16. The wire mesh 10 below the lower disc 6 is distributed in a conical shape with a larger upper part and a smaller lower part.

[0023] The upper end of each wire 10 is fixed on the upper disc 5. The wire 10 can be fixed by welding, binding, clamping or other methods to ensure that the upper end of the wire 10 can rotate synchronously with the upper disc 5.

[0024] The upper disc 5 has a number of second through holes 18 evenly distributed around its circumference, equal to the number of mesh wires 10. The distribution diameter of the second through holes 18 is equal to that of the first through holes 17. Each pair of adjacent mesh wires 10 is formed by the same steel wire being folded back and forth. Specifically, one end of the steel wire passes through a first through hole 17 from bottom to top, then through a second through hole 18 from bottom to top, then folds back and passes through an adjacent second through hole 18 from top to bottom, and then passes through an adjacent first through hole 17 from top to bottom, thus forming two parallel mesh wires 10 between the two discs. Both ends of the steel wire are clamped between the inner conical sleeve 13 and the conical block 14. This mesh-forming method eliminates the need to fix the upper end of the mesh wires 10, reducing the difficulty of the manufacturing process and avoiding the risk of the mesh wires 10 breaking due to an unstable fixing point.

[0025] A horizontal rubber disc 19 is provided between the lower disc 6 and the tensioning device. 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 wire 10. The tensioning unit tensions all the mesh wires 10 uniformly, which may easily lead to insufficient tension in some mesh wires 10. The elasticity of the rubber disc 19 enables it to compensate for the insufficient tension of the mesh wires 10. In order to prevent the rubber disc 19 from blocking water, a first water passage hole 21 is opened on the rubber disc 19.

[0026] The rubber disc 19 has multiple vertical guide rods 22 evenly distributed around its circumference. The upper end of each guide rod 22 slides through the lower disc 6. The multiple guide rods 22 guide and limit the rubber disc 19, keeping it in a horizontal state.

[0027] A support cylinder 23 located inside the mesh wire 10 is provided between the upper disc 5 and the lower disc 6. The upper end of the support cylinder 23 is closed and the lower end is open. The lower end of the support cylinder 23 is fixed to the lower disc 6. The side wall of the support cylinder 23 is densely covered with second water passage holes 24. The mesh wire 10 is attached to the outer wall of the support cylinder 23 to support the mesh wire 10.

[0028] The lower end of the rotating shaft 8 is fixed to the upper end of the support cylinder 23. The upper disk 5 is mounted on the rotating shaft 8 via the bearing 9. Multiple support balls 25 are installed between the upper end of the support cylinder 23 and the upper disk 5. The support balls 25 can support the upper disk 5 and keep the upper disk 5 horizontal.

[0029] Both the openings of the first through hole 17 and the second through hole 18 are rounded to prevent the cutting of the wire mesh 10.

[0030] The lower end of the inner conical sleeve 13 has a rope groove 26. The lower end of the mesh wire 10 passes through the inner conical sleeve 13 and the conical block 14 and then exits through the rope groove 26, thereby tightening the mesh wire 10. When pressing the conical block 14, it can be tightened in two stages. First, it is initially tightened, and the mesh wire 10 can be pulled with force. At this time, the loose mesh wire 10 can be tightened one by one. Then, the conical block 14 is fully pressed and the first compression spring 16 is released. Then, the mesh wire 10 below the inner conical sleeve 13 can be sorted, tied, or cut.

[0031] The upper surface of the upper disk 5 is coaxially fixed with a first gear 27, which meshes 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 disk 5 to rotate through the gear set.

[0032] During filtration, the slag discharge port 3 is closed, and the mesh 10 operates in an inclined state. The greater the inclination, the smaller the spacing between the mesh 10. Wastewater enters the outer shell 1 from the inlet 2, then passes through the filter screen composed of the mesh 10 and the second water passage hole 24 on the support cylinder 23, enters the support cylinder 23, flows through the water passage groove 11 on the lower disc 6 to the bottom of the lower disc 6, and finally is discharged from the outlet 4. Impurities are intercepted by the filter screen.

[0033] During backwashing, rotating the upper disc 5 reduces the inclination of the mesh wires 10 or makes them vertical, thus increasing the spacing between the mesh wires 10. Then, the inlet 2 is closed and the slag outlet 3 is opened. The backwash water enters the outer shell 1 from the outlet 4, passes through the water channel 11 on the lower disc 6, enters the support cylinder 23, then flows out of the support cylinder 23 through the second water passage 24 and the filter screen, and finally exits from the slag outlet 3. Since the spacing between the mesh wires 10 is larger than during filtration, the impurities stuck between the mesh wires 10 can be easily flushed out, improving the backwashing effect.

[0034] When the inclination of the mesh wire 10 increases, the length of the mesh wire 10 between the upper disk 5 and the lower disk 6 increases, the tensioning device moves upward, and the first compression spring 16 is compressed. When the inclination of the mesh wire 10 decreases, the length of the mesh wire 10 between the upper disk 5 and the lower disk 6 decreases, and the tensioning device moves downward under the action of the first compression spring 16, so that the mesh wire 10 can always be kept in a taut state.

[0035] This invention increases the spacing between the mesh wires during backflushing, allowing impurities trapped within the mesh wires to be easily flushed out, thus improving the backflushing effect.

Claims

1. A device for filtering fibrous impurities in dyeing and printing wastewater, comprising a cylindrical outer shell (1) and a filter assembly installed inside the outer shell (1), wherein the outer shell (1) has an inlet (2) and a slag outlet (3) on its side wall, and an outlet (4) at the lower end of the outer shell (1), characterized in that, The filter assembly includes a horizontal upper disc (5) and a lower disc (6), which are coaxially arranged. The lower disc (6) is fixedly installed at the lower end of the outer casing (1) via a vertical shaft (7). The upper disc (5) is rotatably installed at the upper end of the outer casing (1) via a vertical shaft (8) and a bearing (9). A number of mesh wires (10) are evenly distributed around the circumference between the upper disc (5) and the lower disc (6). Each mesh wire (10) is stretched by the upper disc (5) and the lower disc (6). The outer wall of the lower disc (6) is sealed to the inner wall of the outer casing (1) by a sealing ring. The outlet (4) is located below the lower disc (6). A water groove (11) is opened on the surface of the lower disc (6). The filter assembly also includes a tensioning device located below the lower disc (6). The tensioning device includes a sliding sleeve (12) that slides through the vertical shaft (7). The lower end of the sliding sleeve (12) is fixed with an inner conical sleeve (13). A conical block (14) located above the inner conical sleeve (13) slides through the sliding sleeve (12). A clamping nut (15) located above the conical block (14) is screwed onto 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). A first compression spring (16) is installed between the lower disc (6) and the sliding sleeve (12). The lower disc (6) has a number of first through holes (17) that are the same as the number of wire mesh (10) evenly distributed around its circumference. The lower ends of the wire mesh (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). The wire mesh (10) is tensioned under the action of the first compression spring (16).

2. The filtration device for fibrous impurities in dyeing and printing wastewater according to claim 1, characterized in that, The upper end of each of the aforementioned wires (10) is fixed on the upper disc (5).

3. The filtration device for fibrous impurities in dyeing and printing wastewater according to claim 1, characterized in that, The upper disc (5) has a number of second through holes (18) that are equal to the number of mesh wires (10) evenly distributed around its circumference. The distribution circle diameter of the second through holes (18) is equal to that of the first through holes (17). Each pair of adjacent mesh wires (10) is formed by folding and winding the same steel wire back and forth.

4. The filtration device for fibrous impurities in dyeing and printing wastewater according to claim 1, characterized in that, A horizontal rubber disc (19) is provided between the lower disc (6) and the tensioning device. 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 wire (10). A first water passage hole (21) is opened on the rubber disc (19).

5. The filtration device for fibrous impurities in dyeing and printing wastewater according to claim 4, characterized in that, The rubber disc (19) has multiple vertical guide rods (22) evenly distributed around its circumference, and the upper end of each guide rod (22) slides through the lower disc (6).

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

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

8. The filtration device for fibrous impurities in dyeing and printing wastewater according to claim 1, characterized in that, Both the first through hole (17) and the second through hole (18) have rounded corners at their openings.

9. The filtration device for fibrous impurities in dyeing and printing wastewater according to claim 1, characterized in that, The lower end of the inner conical sleeve (13) has a rope groove (26). The lower end of the wire mesh (10) passes between the inner conical sleeve (13) and the conical block (14) and then exits through the rope groove (26).

10. A filtration device for fibrous impurities in dyeing and printing wastewater according to claim 1, characterized in that, The upper surface of the upper disk (5) is coaxially fixed with a first gear (27), the first gear (27) meshes with a second gear (28), and the second gear (28) is connected to a drive motor (29) located outside the outer casing (1) via a transmission shaft.

Images