A printing and dyeing wastewater pigment filtering device

Abstract

This utility model relates to the field of dyeing and printing wastewater treatment technology, specifically a dyeing and printing wastewater pigment filtration device, including a filter box with external pipes on both sides. The filter box has a filter groove inside, a rinsing plate and a maintenance cover at the top, a splicing mechanism and a rinsing mechanism between the rinsing plate and the filter groove, a sealing box in the filter groove, a slot at the top of the sealing box connecting to the bottom, filter ports on both sides, a composite filter structure in the slot, and a threaded hole at one end of the sealing box penetrating the sealing box. This device achieves automatic cleaning of the composite filter structure through the cooperation of a movable sealing box and a rinsing structure, reducing maintenance difficulty and extending filter media life. The overall structure is reasonable and highly practical.

Description

Technical Field

[0001] This utility model relates to the field of dyeing and printing wastewater treatment technology, specifically to a dyeing and printing wastewater pigment filtration device. Background Technology

[0002] As is well known, the textile dyeing and finishing industry generates a large amount of dyeing and printing wastewater containing pigments during production. Direct discharge of this wastewater would severely pollute aquatic environments and disrupt the ecological balance; therefore, it must be filtered to meet standards before discharge. Currently, commercially available devices for filtering pigments from dyeing and printing wastewater have several shortcomings in practical use: Many filtration devices have fixed filter components, meaning that wastewater can only come into contact with a localized area of ​​the filter component during filtration. This can lead to excessive impurity trapping in certain areas while other areas remain idle, resulting in low filtration efficiency and difficulty in ensuring the stability of the filtration effect. Furthermore, when the filter components need cleaning or replacement, it is often necessary to disassemble multiple parts of the device, which is cumbersome and not only increases the workload of the staff but also causes the device to be shut down for extended periods, affecting the wastewater treatment progress.

[0003] Furthermore, some filtration devices lack convenient cleaning mechanisms. After prolonged use, a large amount of trapped pigments and impurities accumulate on the surface of the filter components. If not cleaned promptly and effectively, this can lead to clogging of the filter components, further reducing filtration efficiency and even shortening their lifespan, thus increasing equipment operating costs. These problems make existing dyeing and printing wastewater pigment filtration devices unable to meet the demands of efficient, stable, and convenient wastewater treatment in actual production. Therefore, there is an urgent need for a dyeing and printing wastewater pigment filtration device that can solve the aforementioned problems. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a pigment filtration device for dyeing and printing wastewater.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a pigment filtration device for dyeing and printing wastewater, comprising a filter box, external connecting pipes on both sides of the filter box, a filter groove inside the filter box, a rinsing plate and a maintenance cover at the top of the filter box, a splicing mechanism and a rinsing mechanism between the rinsing plate and the filter groove, a sealing box in the filter groove, a slot at the top of the sealing box connecting to the bottom of the sealing box, filter ports on both sides of the sealing box, a composite filter structure in the slot, a threaded hole at one end of the sealing box penetrating the sealing box, a drive motor at one end of the filter box, the output end of the drive motor extending into the filter groove and having a lead screw passing through the threaded hole.

[0006] Furthermore, the present invention is improved in that the splicing mechanism includes a threaded groove, which is formed at the top of the filter box and communicates with the filter tank, and the rinsing disc is threadedly connected to the threaded groove.

[0007] Furthermore, the present invention is improved in that the rinsing mechanism includes a water pump and a drain tank. The water pump is installed at the top of the rinsing plate, and the top of the water pump is provided with a liquid inlet pipe. A rinsing chamber is opened between the water pump and the interior of the filter box. A nozzle is provided between the rinsing chamber and the bottom of the rinsing plate. Multiple nozzles are provided and arranged in a circular array. The drain tank is opened at the bottom of the filter tank, and a drain pipe is provided between the drain tank and the bottom of the filter box.

[0008] Furthermore, the present invention is improved in that the composite filtration structure includes a modified activated carbon filter media layer, a hollow fiber ultrafiltration membrane module, and a modified diatomaceous earth filter media layer.

[0009] Furthermore, the present invention is improved in that both the external connecting pipe and the sewage pipe are equipped with valves, and the valves are electric valves.

[0010] Furthermore, an improvement of this utility model is that the drive motor is a servo motor.

[0011] Furthermore, the present invention is improved by providing sealing strips around the top and bottom of the sealed box.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a pigment filtration device for dyeing and printing wastewater, which has the following beneficial effects: This dyeing and printing wastewater pigment filtration device uses a drive motor to rotate a lead screw. The lead screw engages with the threaded hole of the sealing box, allowing the sealing box to move horizontally and linearly within the filter tank. During filtration, the sealing box can be precisely moved to align the filter port with the external connecting pipe, ensuring that the dyeing and printing wastewater can smoothly enter the sealing box through the filter port and completely pass through the composite filter structure, effectively trapping pigments and impurities. Simultaneously, the movable design of the sealing box avoids the problem of wastewater only partially contacting the filter components, ensuring that all areas of the filter components can function fully, significantly improving filtration efficiency and the stability of the filtration effect.

[0013] When cleaning the composite filter structure is required, there is no need to disassemble complex components. Simply stop the wastewater supply, move the sealed box to one side of the filter tank using the drive motor, and then use the rinsing mechanism between the rinsing disc and the filter tank to rinse the composite filter structure through slotting. This effectively removes pigments and impurities adhering to the surface of the filter media, restores filtration performance, and extends the service life of the filter media. The entire cleaning process is simple to operate, requires no long-term downtime, and significantly reduces the maintenance time and cost of the equipment. Attached Figure Description

[0014] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This is a front half-sectional view of the structure of this utility model; Figure 4 This is a top half-sectional view of the structure of this utility model.

[0015] In the diagram: 1. Filter box; 2. External pipe; 3. Flushing plate; 4. Maintenance cover; 5. Sealed box; 6. Slot; 7. Filter port; 8. Drive motor; 9. Lead screw; 10. Water pump; 11. Drainage tank; 12. Liquid inlet pipe; 13. Flushing chamber; 14. Nozzle; 15. Drainage pipe; 16. Modified activated carbon filter media layer; 17. Hollow fiber ultrafiltration membrane module; 18. Modified diatomaceous earth filter media layer; 19. Valve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4This utility model relates to a pigment filtration device for dyeing and printing wastewater, comprising a filter box 1, external pipes 2 on both sides of the filter box 1, a filter groove inside the filter box 1, a rinsing plate 3 and a maintenance cover 4 at the top of the filter box 1, a splicing mechanism and a rinsing mechanism between the rinsing plate 3 and the filter groove, a sealing box 5 in the filter groove, a slot 6 at the top of the sealing box 5 connecting to the bottom of the sealing box 5, filter ports 7 on both sides of the sealing box 5, a composite filtration structure in the slot 6, a threaded hole at one end of the sealing box 5, and a drive motor 8 at one end of the filter box 1. The output end of the drive motor 8 extends into the filter groove and is provided with a lead screw 9, which passes through the threaded hole. In this embodiment, one external pipe 2 is connected to a pipe supplying dyeing and printing wastewater, and the other external pipe 2 is connected to a pipe for the filtered wastewater to flow out or to a pipe for the next treatment process. By controlling the output end of the drive motor 8 to rotate the lead screw 9, the filter is filtered through the threaded hole. The threaded hole of the sealing box 5 allows it to move horizontally in the filter tank. The drive motor 8 stops when the sealing box 5 moves to the point where its filter port 7 aligns with the outer connecting pipe 2. Dyeing wastewater enters the sealing box 5 through the filter port 7 via the outer connecting pipe 2, passing through the composite filter structure fixed in the slot 6. Pigments and impurities are trapped by the composite filter structure. The filtered wastewater is discharged from the other side of the outer connecting pipe 2. After long-term use, to ensure filtration effect and quality, the composite filter structure needs to be cleaned regularly. At this time, the wastewater supply is stopped, and the output end of the drive motor 8 is rotated by the screw 9, causing the sealing box 5 to move to one side of the filter tank. Then, the composite filter structure is rinsed through the slot 6 via the rinsing mechanism between the rinsing disc 3 and the filter tank to restore filtration performance and extend the filter media's lifespan. After rinsing, the sealing box 5 is reset, allowing for renewed filtration of pigments and impurities from the wastewater. When the composite filter structure needs to be replaced after long-term use, simply open the maintenance cover 4 and replace the composite filter structure directly through the slot 6. This method is convenient.

[0018] To facilitate the assembly of the rinsing disc 3, in this design, the splicing mechanism includes a threaded groove. The threaded groove is located at the top of the filter box 1 and connects to the filter channel. The rinsing disc 3 is threadedly connected to the threaded groove. The threaded connection enables the rinsing disc 3 to be detachably fixed to the filter box 1. The rinsing disc 3 can be rotated to complete the installation or removal. The threaded fit also ensures the connection is sealed.

[0019] To facilitate cleaning of the composite filter structure, in this design, the rinsing mechanism includes a water pump 10 and a drain trough 11. The water pump 10 is installed at the top of the rinsing plate 3, and an inlet pipe 12 is provided at the top of the water pump 10. A rinsing chamber 13 is formed between the water pump 10 and the interior of the filter box 1. A spray nozzle 14 is provided between the rinsing chamber 13 and the bottom of the rinsing plate 3. Multiple spray nozzles 14 are arranged in a circular array. The drain trough 11 is located at the bottom of the filter box, and a drain pipe is provided between the drain trough 11 and the bottom of the filter box 1. 15. The water pump 10 delivers cleaning water to the rinsing chamber 13 through the inlet pipe 12. The water is then evenly sprayed onto the surface of the composite filter structure through the annularly distributed nozzles 14, washing away the pigments and impurities trapped by the filter media. The cleaning wastewater flows into the drain trough 11 at the bottom of the filter tank under the influence of gravity, and is finally discharged through the drain pipe 15. The annular nozzles 14 ensure that there are no dead corners in the rinsing, avoiding localized impurities remaining on the filter media. The design of the drain trough 11 and the drain pipe 15 enables the directional collection and discharge of cleaning wastewater, preventing the cleaning wastewater from mixing with the wastewater to be treated. At the same time, there is no need for manual cleaning of cleaning residue, reducing maintenance costs. The composite filtration structure includes a modified activated carbon filter layer 16, a hollow fiber ultrafiltration membrane module 17, and a modified diatomaceous earth filter layer 18. The modified activated carbon filter layer 16 adsorbs soluble pigments through its porous structure, the hollow fiber ultrafiltration membrane module 17 (with a molecular weight cutoff of 10,000-30,000 Da) retains large molecular pigments and colloidal particles, and the modified diatomaceous earth filter layer 18 further adsorbs residual small molecular pigments and organic matter, forming a multi-stage filtration system of adsorption and retention.

[0020] To facilitate the control of valve 19, valve 19 is provided on both the external connecting pipe 2 and the sewage pipe 15 in this design. Valve 19 is an electric valve, controlled by an electrical signal. It can be linked with an external control system such as a PLC to achieve automated control of wastewater inflow and outflow and cleaning wastewater discharge, eliminating the need for manual operation of valve 19. To improve the moving accuracy of the sealing box 5, in this solution, the drive motor 8 is a servo motor. The servo motor can precisely control the speed and rotation angle through pulse signals, and then precisely control the moving speed, position and stroke of the sealing box 5 through the lead screw 9.

[0021] To reduce wastewater seepage into the filter tank, in this design, sealing strips are provided around the top and bottom of the sealing box 5. The sealing strips fill the gaps between the sealing box 5 and the inner wall of the filter tank and the maintenance cover 4, forming a physical seal to prevent unfiltered wastewater from seeping into the filter tank through the gaps. This ensures that all wastewater is treated by the composite filtration structure, guarantees that the effluent water quality is stable and meets the standards, and avoids cross-contamination of water bodies in different areas.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pigment filtration device for dyeing and printing wastewater, comprising a filter box (1), wherein external connecting pipes (2) are provided on both sides of the filter box (1), characterized in that, The filter box (1) has a filter groove inside. The top of the filter box (1) is provided with a flushing plate (3) and a maintenance cover (4). The flushing plate (3) and the filter groove are provided with a splicing mechanism and a flushing mechanism. The filter groove is provided with a sealing box (5). The top of the sealing box (5) is provided with a slot (6). The slot (6) connects to the bottom of the sealing box (5). The two sides of the sealing box (5) are provided with filter ports (7). The slot (6) is provided with a composite filter structure. One end of the sealing box (5) is provided with a threaded hole. The threaded hole passes through the sealing box (5). One end of the filter box (1) is provided with a drive motor (8). The output end of the drive motor (8) extends into the filter groove and is provided with a lead screw (9). The lead screw (9) passes through the threaded hole.

2. The dyeing wastewater pigment filtration device according to claim 1, characterized in that, The splicing mechanism includes a threaded groove, which is opened at the top of the filter box (1) and communicates with the filter tank. The rinsing plate (3) is threadedly connected to the threaded groove.

3. The dyeing wastewater pigment filtration device according to claim 2, characterized in that, The rinsing mechanism includes a water pump (10) and a drain trough (11). The water pump (10) is installed at the top of the rinsing plate (3). The top of the water pump (10) is provided with an inlet pipe (12). A rinsing chamber (13) is opened between the water pump (10) and the interior of the filter box (1). A nozzle (14) is provided between the rinsing chamber (13) and the bottom of the rinsing plate (3). Multiple nozzles (14) are provided and arranged in a circular array. The drain trough (11) is opened at the bottom of the filter trough. A drain pipe (15) is provided between the drain trough (11) and the bottom of the filter box (1).

4. The dyeing wastewater pigment filtration device according to claim 1, characterized in that, The composite filtration structure includes a modified activated carbon filter media layer (16), a hollow fiber ultrafiltration membrane module (17), and a modified diatomaceous earth filter media layer (18).

5. A pigment filtration device for dyeing and printing wastewater according to claim 3, characterized in that, Both the external pipe (2) and the sewage pipe (15) are equipped with valves (19), and the valves (19) are electric valves.

6. The dyeing wastewater pigment filtration device according to claim 1, characterized in that, The drive motor (8) is a servo motor.

7. The dyeing wastewater pigment filtration device according to claim 1, characterized in that, The top and bottom of the sealed box (5) are provided with sealing strips.

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