Wool filtering machine and multi-stage treatment process for printing and dyeing wastewater

Abstract

The wool filtering machine comprises a box body, a filtering assembly and a cleaning assembly, the side wall of the box body is provided with a water inlet pipe communicated with a workshop sewage pipe, the bottom of the box body is provided with a water outlet pipe communicated with an adjusting pool, the filtering assembly comprises a supporting frame and a plurality of filtering nets, and the supporting frame is provided with a water inlet pipe communicated with a water outlet pipe communicated with an adjusting pool. The bottom of the supporting frame covers the water outlet pipe, the filter screen is arranged on the supporting frame, a plurality of sliding grooves are formed in the supporting frame, the cleaning assembly comprises a mounting ring, a plurality of cleaning rods and a driving air cylinder, the mounting ring and the supporting frame are coaxially arranged, the mounting ring is slidably connected to the box body in the vertical direction, and the driving air cylinder drives the cleaning rods to rotate. One end of each cleaning rod is arranged on the mounting ring, each cleaning rod is provided with a protruding strip for hooking hair, the sliding grooves are used for containing the cleaning rods, and the driving air cylinder is used for driving the mounting ring to move. The method has the advantages that the shutdown maintenance time is shortened, and therefore the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing and dyeing wastewater treatment, and in particular to a filter hair machine and a multi-stage treatment process for printing and dyeing wastewater. BACKGROUND

[0002] In the production process of the textile printing and dyeing industry, a large amount of printing and dyeing wastewater containing lint, short fibers, fine suspended solids and other impurities will be generated. If such wastewater is directly discharged into the subsequent treatment unit, it will not only affect the treatment effect, but also block the pipelines, membrane components and other core components of the subsequent treatment equipment, resulting in frequent failures of the subsequent treatment system and increased maintenance costs. Therefore, in the multi-stage treatment process of printing and dyeing wastewater, the pre-filtering hair treatment is a crucial pretreatment link. The filter hair machine, as the core equipment to achieve this link, its main function is to intercept and separate the lint and various fiber impurities in the wastewater through the filter screen, to ensure the stable and efficient operation of the subsequent biochemical treatment, depth filtration and other processes.

[0003] To avoid the filter screen blockage causing the filter hair machine to be unable to work normally, the existing technology usually adopts the mode of stopping cleaning to maintain the filter screen, which specifically includes manually disassembling the filter screen for flushing, replacement, or using the simple cleaning structure provided by the equipment to complete the filter screen cleaning in the stopped state. However, this mode of stopping cleaning has significant defects: on the one hand, the printing and dyeing wastewater treatment often needs continuous operation to meet the batch processing requirements of industrial production, and frequent stopping operation will directly interrupt the process of the multi-stage treatment process of printing and dyeing wastewater, resulting in a significant reduction in processing efficiency, which is difficult to match the efficient processing requirements of large-scale production of enterprises; on the other hand, the stopping cleaning process consumes a large amount of labor cost and time cost, and after the cleaning is completed, the equipment needs to go through the stages of debugging, stabilization and the like before being restarted, further prolonging the processing cycle and increasing the operating cost of the enterprise. SUMMARY

[0004] In order to reduce the downtime maintenance time and improve the work efficiency, the present application provides a filter hair machine and a multi-stage treatment process for printing and dyeing wastewater.

[0005] In the first aspect, the present application provides a filter hair machine, which adopts the following technical solution: The hair filterer includes a box, a filter assembly and a cleaning assembly, the box is provided with an inlet pipe communicated with a workshop sewage pipe on a side wall, the bottom of the box is provided with an outlet pipe communicated with a regulating pool, the filter assembly includes a support frame and a plurality of filter screens, the support frame is in the shape of a circular truncated cone, the bottom of the support frame covers the outlet pipe, the plurality of filter screens are distributed along the axis of the support frame in the circumferential direction, the filter screens are arranged on the support frame, a plurality of sliding grooves are formed in the support frame, and the sliding grooves and the filter screens are alternately distributed, the cleaning assembly includes a mounting ring, a plurality of cleaning rods and a driving cylinder, the mounting ring is coaxially arranged with the support frame, the mounting ring is slidably connected to the box in the vertical direction, one end of each of the cleaning rods is arranged on the mounting ring, the cleaning rods are provided with protrusions for hooking hair, the sliding grooves are used for accommodating the cleaning rods, and the cleaning rods coincide with the generatrix of the support frame so that the protrusions are exposed to the support frame, and the driving cylinder is used for moving the mounting ring.

[0006] By adopting the technical scheme, the box is communicated with the workshop sewage pipe through the inlet pipe, can directly receive printing and dyeing wastewater, the bottom outlet pipe is connected with the regulating pool, and the continuous flow of wastewater treatment is ensured; the support frame in the shape of a circular truncated cone can stably support the filter screens, the design that the bottom of the support frame covers the outlet pipe can guide the wastewater to uniformly flow through the filter screens, and direct impact of the wastewater on the outlet pipe to cause impurity leakage is avoided; the plurality of filter screens are distributed along the axis of the support frame in the circumferential direction and are alternately arranged with the sliding grooves, the filtering space is maximally utilized, the interception efficiency of impurities such as hair and short fibers in the wastewater is improved, the pipelines and membrane assemblies of subsequent treatment equipment are effectively prevented from being blocked, and the stable operation of subsequent processes such as biochemical treatment and depth filtration is ensured; in the cleaning assembly, the mounting ring is coaxially arranged with the support frame and slides in the vertical direction, one end of each of the cleaning rods is fixed to the mounting ring and coincides with the generatrix of the support frame, the protrusions on the cleaning rods are exposed, the cleaning rods can not affect the flow of the wastewater during the filtering process, and the protrusions can hook the hair lint wound on the support frame and the filter screens during cleaning; the sliding grooves provide accommodation space for the cleaning rods, ensure that the cleaning rods do not interfere with the filtering operation in a non-working state, and when the driving cylinder drives the mounting ring to move vertically, the cleaning rods move synchronously along the sliding grooves, the protrusions can limit the expansion of the wound hair lint, force the hair lint to move upwards along the cleaning rods and away from the support frame and the filter screens, and realize preliminary cleaning without shutdown, avoid the production process interruption caused by traditional shutdown cleaning, greatly improve the wastewater treatment efficiency, and reduce the operating cost.

[0007] Optionally, one end of the cleaning rod is rotationally connected to the mounting ring in the tangential direction of the mounting ring, the mounting ring is provided with a limiting piece for limiting the rotation of the cleaning rod towards the axis of the support frame, and the limiting piece includes a plurality of ratchet teeth, a pawl and a spring, the ratchet teeth are distributed in the circumferential direction of the rotation axis of the cleaning rod, the ratchet teeth are arranged on the cleaning rod, the pawl is rotationally connected to the mounting ring, and the spring is used to keep the pawl clamped on the ratchet teeth.

[0008] By adopting the technical scheme, one end of the cleaning rod is rotationally connected along the tangential direction of the mounting ring to provide a structural basis for subsequent state switching of the cleaning rod; the limiting member provided on the mounting ring is composed of a ratchet, a pawl and a spring, the plurality of ratchets are distributed in the circumferential direction of the cleaning rod along the rotation axis of the cleaning rod, the pawl is rotationally connected to the mounting ring, and the spring always applies a spring force to enable the pawl to be clamped to the ratchet to form a one-way limiting structure, which can effectively limit the rotation of the cleaning rod toward the axis of the support frame. During the filtering and cleaning of lint, the limiting structure can ensure that the cleaning rod always maintains a state of coinciding with the generatrix of the support frame, avoids the deviation of the cleaning rod due to external forces such as wastewater impact and lint pulling, ensures that the protrusions are always exposed and can stably hook the lint, prevents the position change of the cleaning rod from affecting the peeling effect of the lint, ensures the working stability of the cleaning assembly, and further ensures the continuous and efficient operation of the lint filter.

[0009] Optionally, a release member for releasing the pawl from the ratchet is arranged on the mounting ring, the release member includes a release frame, a plurality of protrusions and a release cylinder, the release frame is slidably connected to the mounting ring in the vertical direction, the plurality of protrusions correspond to the plurality of pawls, the protrusions are arranged on the release frame, and the release cylinder is used to drive the release frame to slide.

[0010] By adopting the technical scheme, the release member is composed of a release frame, protrusions and a release cylinder, the release frame is slidably connected to the mounting ring in the vertical direction, the protrusions are arranged on the release frame in one-to-one correspondence with the pawls, and the release cylinder can drive the release frame to slide up and down; when the cleaning rod carrying the lint moves upward to a specified position and needs to be released, the release cylinder is started to drive the release frame to move downward, the protrusions abut against the pawls and force the pawls to overcome the spring force to be released from the ratchets, the rotation limitation on the cleaning rod is released, and the cleaning rod can freely rotate to switch the state; when the release of the lint is completed, the release cylinder drives the release frame to move upward, the protrusions are released from the pawls, the pawls are clamped to the ratchets again under the action of the spring force, the rotation of the cleaning rod is limited again, the cleaning rod can stably be in the working state after being reset, the whole process does not need manual intervention, the automation control of the limiting and releasing is realized, and the convenience of equipment operation and the continuity of the cleaning process are improved.

[0011] Optionally, a counterweight is arranged on the cleaning rod, the counterweight enables the free end of the cleaning rod to face the axis of the support frame when the cleaning rod is in a free rotating state, and a plurality of cleaning rods in the free rotating state form an inverted circular table shape.

[0012] By adopting the above technical solution, the counterweight ensures that when the rotation restriction of the cleaning rod is lifted, its free end naturally faces the axis of the support frame under the action of gravity, and several cleaning rods together form an inverted frustum structure. When the cleaning rod moves upward and detaches from the filter screen and the support frame, the lint that was originally wrapped around the cleaning rod and the protrusions loses its stable wrapping support due to the inverted frustum shape of the cleaning rod. At the same time, under the action of its own gravity and the pulling force generated by the change in the shape of the cleaning rod, it quickly falls off the cleaning rod. There is no need to manually clean the residual lint on the cleaning rod, avoiding the time-consuming and labor-intensive problem of manual cleaning, shortening the cleaning cycle, ensuring that the equipment can quickly enter the next round of filtration, and improving the overall processing efficiency.

[0013] Optionally, the sliding groove extends through the top of the support frame, and the support frame is provided with a guide slope, which facilitates the guidance of several cleaning rods forming an inverted frustum shape into the sliding groove.

[0014] By adopting the above technical solution, the sliding groove runs through the top of the support frame, providing a channel for the cleaning rod to enter the sliding groove from above. The guide ramp on the support frame acts as a guide when the cleaning rod needs to be reset. When the cleaning rod moves downwards in an inverted frustum shape, its free end first contacts the guide ramp. Under the guidance and compression of the ramp, the cleaning rod gradually rotates around the rotating connection point of the mounting ring, its posture gradually adjusting from an inverted frustum shape to a state parallel to the generatrix of the support frame, thus smoothly entering the sliding groove. This design avoids the problem of the cleaning rod failing to accurately enter the sliding groove due to posture deviation during reset, eliminating the need for manual adjustment of the cleaning rod's position, achieving automation and precision in cleaning rod reset, and ensuring the circulation of the filtration and cleaning process. Optionally, the mesh orientation of the filter screen is tangential to the corresponding position of the frustum-shaped support frame.

[0015] By adopting the above technical solution, the tangential mesh openings guide the water flow, causing the wastewater to form a stable vortex motion within the tank. This vortex motion makes it easier for lint to entangle on the support frame and filter screen, forming concentrated flocculent material rather than dispersed and adhering to the filter screen surface. This facilitates precise hooking and grabbing by the protrusions of subsequent cleaning components and reduces deep clogging of lint within the mesh openings, slowing down the rate at which the filter screen's filtration resistance increases. Simultaneously, the tangential mesh design optimizes water flow efficiency, preventing water flow obstruction caused by improper mesh orientation. Optionally, the free end of the cleaning rod is provided with a scraper, which is used to scrape off dirt or lint remaining in the sliding groove.

[0016] By adopting the above technical solution, during the long-term use of the filter press, some fine lint and dirt may adhere to the inner wall of the sliding groove. If not cleaned in time, it will cause the cleaning rod to be obstructed from moving, not to reset accurately, and even affect the filtration effect. The scraper at the free end of the cleaning rod is in contact with the inner wall of the sliding groove. When the cleaning rod moves down along the sliding groove, the scraper scrapes the inner wall of the sliding groove at the same time, scraping away the residual dirt and lint. This ensures that the inside of the sliding groove is always clean and unobstructed, avoiding problems such as cleaning rod jamming and wear caused by residual impurities. It ensures the smooth movement and accurate reset of the cleaning rod, thereby maintaining the stable performance of the filtration and cleaning functions and extending the service life of the core components of the equipment.

[0017] Optionally, the box body is provided with a receiving component for receiving fallen lint. The receiving component includes a sliding plate, a receiving basin, and a driving component. The sliding plate is slidably connected to the box body in a horizontal direction, the receiving basin is placed on the sliding plate, and the driving component is used to drive the sliding plate to move.

[0018] By adopting the above technical solution, when lint falls from the cleaning rod, the receiving basin is precisely positioned below the cleaning rod, accurately catching the falling lint and preventing it from scattering into the box or around the equipment, maintaining a clean working environment, and preventing the scattered lint from re-entering the wastewater and affecting the treatment effect. When the lint accumulates to a certain amount in the receiving basin, the drive component moves the sliding plate horizontally out of the box, making it convenient for workers to remove the receiving basin and empty the lint. Lint cleaning can be completed without disassembling the equipment, making operation convenient. After the lint is emptied, the drive component moves the sliding plate back to its original position, and the receiving basin returns to its receiving position, realizing automated assistance for lint collection and cleaning, reducing manual labor intensity, and improving work efficiency.

[0019] Optionally, the driving component includes a driving screw and a driving motor. The length direction of the driving screw is parallel to the sliding direction of the sliding plate. The driving screw is rotatably connected to the housing. The sliding plate is threadedly connected to the driving screw. The driving motor is used to drive the driving screw to rotate.

[0020] By adopting the above technical solution, the screw is driven by a motor to rotate, and the rotational motion of the motor is converted into the linear motion of the sliding plate through threaded transmission. Compared with other driving methods, threaded transmission has the advantages of smooth transmission and precise positioning, which can ensure that the sliding plate moves the receiving basin accurately to or out of the receiving position, avoiding the lint from being scattered due to the offset of the receiving basin. At the same time, the control of the drive motor is convenient, which can realize the automated control of the movement of the sliding plate. Combined with the overall cleaning process of the equipment, it further improves the automation level and ease of operation of the equipment and reduces human operation errors.

[0021] Secondly, this application provides a multi-stage treatment process for dyeing and printing wastewater. Optionally, S1: Wastewater pretreatment, where workshop wastewater is passed into one of the above-mentioned filter presses to remove lint from the wastewater; S2: Pass the filtered wastewater into the equalization tank to balance the wastewater quality and reduce water quality peaks; S3: Pass the wastewater from the equalization tank into the shallow air flotation equipment and add ferrous iron and polymeric agents to adjust the pH value of the wastewater and improve the coagulation and flocculation effect. S4: The sludge and wastewater in the shallow air flotation equipment are extracted into the anaerobic tank, and the metabolic action of anaerobic microorganisms is used to decompose the macromolecules and recalcitrant organic matter in the wastewater. S5: Anaerobic effluent enters the aerobic tank, where microorganisms convert the remaining organic matter in the wastewater into harmless substances such as carbon dioxide and water in an aerobic environment. S6: Aerobic effluent flows into the secondary sedimentation tank, which provides space for solid-liquid separation of wastewater. Some of the settled sludge can be returned to the aerobic tank. S7: The sludge scraper in the secondary sedimentation tank scrapes the remaining sludge to the sludge collection area, which facilitates sludge collection. The collected sludge can be further dewatered and treated to reduce secondary pollution.

[0022] In summary, this application includes at least one of the following beneficial technical effects: The lint filter machine constructs a filtration structure with a frustum-shaped support frame and circumferentially distributed filter screens. Combined with a vertically sliding cleaning component, it can remove lint without stopping the machine. The filter mesh is designed with tangential orientation to guide the wastewater to form a vortex. Centrifugal force is used to concentrate and entangle impurities such as lint and short fibers on the support frame and filter mesh, thereby improving the interception efficiency. The cleaning rod hooks lint with its raised strips and moves upward with the mounting ring to detach from the filter screen. Then, with the help of a counterweight and release mechanism, the lint automatically falls off, eliminating the need for manual removal of the filter screen. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a fiber filter machine.

[0024] Figure 2 yes Figure 1 A cross-sectional view of the central support frame, used to show the sliding groove and filter screen.

[0025] Figure 3 This is a structural diagram of the cleaning components and release mechanism.

[0026] Figure 4 yes Figure 3 The enlarged view at point A in the middle is used to show the limiting component.

[0027] Figure 5 This is a structural diagram of the supporting components.

[0028] Reference numerals: 1. Housing; 11. Inlet pipe; 12. Outlet pipe; 13. Regulating valve; 14. Liquid level sensor; 2. Filter assembly; 21. Support frame; 22. Filter screen; 23. Sliding groove; 24. Guide slope; 3. Cleaning assembly; 31. Mounting ring; 32. Cleaning rod; 33. Drive cylinder; 34. Protrusion; 35. Scraper; 4. Limiting component; 41. Racket; 42. Pad; 43. Spring; 44. Paddle plate; 5. Release component; 51. Release frame; 52. Protrusion; 53. Release cylinder; 54. Counterweight; 6. Receiving assembly; 61. Sliding plate; 611. Container hole; 62. Receiving basin; 621. Handle; 63. Drive component; 631. Drive screw; 632. Drive motor. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail.

[0030] This application discloses a filter press. (Refer to...) Figure 1 and Figure 2 A filter press includes a housing 1, a filter assembly 2, and a cleaning assembly 3. The housing 1 has an opening at its upper end, and an inlet pipe 11 is provided on the side wall of the housing 1. One end of the inlet pipe 11 is connected to a workshop sewage pipe. An outlet pipe 12 is provided at the lower end of the housing 1, and one end of the outlet pipe 12 is connected to a regulating tank. Both the inlet pipe 11 and the outlet pipe 12 are equipped with regulating valves 13. The filter assembly 2 includes a support frame 21 and several filter screens 22. The support frame 21 is frustoconical in shape, with its axis vertically aligned. The support frame 21 covers the outlet pipe 12, and its upper end is sealed. The filter screens 22 are arranged along the support frame. The support frame 21 is evenly distributed along its axis. The filter screen 22 is fixedly mounted on the support frame 21. The filter screen 22 and the support frame 21 form a complete frustum. The mesh of the filter screen 22 faces the tangent direction at the corresponding position on the support frame 21. The support frame 21 is provided with several sliding grooves 23. The sliding grooves 23 and the filter screens 22 are alternately distributed. The sliding grooves 23 penetrate the upper end face of the support frame 21 along the generatrix direction. The bottom of the sliding grooves 23 is U-shaped parabolic. A liquid level sensor 14 is also provided on the box 1. The liquid level sensor 14 is used to control the liquid level in the box 1 to always be below the top of the support frame 21.

[0031] Reference Figure 1 and Figure 3The cleaning component 3 includes a mounting ring 31, several cleaning rods 32, and a driving cylinder 33. The mounting ring 31 is coaxially arranged with the support frame 21 and is vertically slidably connected to the housing 1. The driving cylinder 33 is vertically arranged, and its cylinder body is fixedly mounted on the housing 1. The piston rod of the driving cylinder 33 is fixedly connected to the mounting ring 31. Several cleaning rods 32 correspond to several sliding grooves 23. One end of each cleaning rod 32 is rotatably connected to the mounting ring 31 along the tangential direction of the mounting ring 31. When the mounting ring 31 abuts against the support... When the cleaning rod 32 is positioned on the upper end of the support frame 21, it is located within the sliding groove 23, and the length direction of the cleaning rod 32 coincides with the generatrix of the support frame 21. The cleaning rod 32 is provided with several protruding strips 34, which are distributed along the length direction of the cleaning rod 32. The protruding strips 34 are exposed outside the support frame 21 and are used to hook lint. The free end of the cleaning rod 32 is provided with a scraper 35. When the cleaning rod 32 moves within the sliding groove 23, the scraper 35 is used to abut against the bottom of the sliding groove 23 and is used to scrape away impurities and lint within the sliding groove 23.

[0032] Reference Figure 3 and Figure 4 The mounting ring 31 is provided with a limiting member 4 for restricting the free end of the cleaning rod 32 from rotating toward the axis of the support frame 21. The limiting member 4 includes several ratchet teeth 41, pawls 42, springs 43 and a lever 44. The ratchet teeth 41 are circumferentially distributed along the rotation axis of the cleaning rod 32 and are fixedly mounted on the cleaning rod 32. The rotation axis of the pawls 42 is parallel to the rotation axis of the cleaning rod 32 and is rotatably connected to the mounting ring 31. The lever 44 is fixedly mounted on the pawls 42. The springs 43 are vertically mounted, with one end fixedly mounted on the lever 44 and the other end fixedly mounted on the mounting ring 31. The springs 43 are used to drive the pawls 42 to remain in the ratchet 41 engagement state.

[0033] Reference Figure 3 and Figure 4The mounting ring 31 is also equipped with a release element 5 for disengaging the pawl 42 from the ratchet tooth 41. The release element 5 includes a release frame 51, several protrusions 52, and two release cylinders 53. The release frame 51 is located above the mounting ring 31 and is slidably connected to the housing 1 in the vertical direction. The two release cylinders 53 are distributed circumferentially along the axis of the mounting ring 31. The cylinder body of the release cylinder 53 is fixedly mounted on the housing 1, and the piston rod of the release cylinder 53 is fixedly connected to the release frame 51. Several protrusions 52 correspond to several limiting elements 4 and are fixedly mounted. Placed on the release frame 51, the protrusion 52 is used to abut against the lever 44 to overcome the elastic force of the spring 43 and make the pawl 42 disengage from the ratchet 41. The cleaning rod 32 is also provided with a counterweight 54. When the cleaning rod 32 is in a free rotation state, the counterweight 54 drives the free end of the cleaning rod 32 to move in the direction of the axis of the support frame 21. Several cleaning rods 32 form an inverted frustum shape. A guide slope 24 is provided between the top of the support frame 21 and the bottom of the sliding groove 23 to facilitate the free ends of several cleaning rods 32 forming an inverted frustum shape to enter the sliding groove 23.

[0034] Reference Figure 1 and Figure 5 The housing 1 is equipped with a receiving component 6 for receiving fallen lint. The receiving component 6 includes a sliding plate 61, a receiving basin 62, and a driving component 63. The sliding plate 61 is horizontally set and slides along the horizontal direction close to the orthogonal projection of the mounting ring 31 to the housing 1. The sliding plate 61 has a collection hole 611. The receiving basin 62 is horizontally set and its opening faces upward. The receiving basin 62 is placed in the collection hole 611 and has a handle 621. The driving component 63 includes a driving screw 631 and a driving motor 632. The length direction of the driving screw 631 is parallel to the sliding direction of the sliding plate 61. The driving screw 631 is rotatably connected to the housing 1. The sliding plate 61 is threadedly connected to the driving screw 631. The driving motor 632 is fixedly set on the housing 1, and the output shaft of the driving motor 632 is fixedly connected to one end of the driving screw 631.

[0035] The implementation principle of a filter press according to an embodiment of this application is as follows: When the filter press is in standby mode, each component is reset to its initial position: the mounting ring 31 abuts against the upper end face of the support frame 21 under the action of the driving cylinder 33, the cleaning rod 32 is accommodated in the sliding groove 23 and fixed by the limiting member 4, maintaining the posture of coinciding with the generatrix of the support frame 21, the protrusion 34 is exposed outside the support frame 21, and the scraper 35 is attached to the bottom of the sliding groove 23; the release member 5 is in the initial state, and the pawl 42 is engaged with the ratchet 41 under the action of the spring 43, restricting the rotation of the cleaning rod 32; in the receiving component 6, the sliding plate 61 drives the receiving basin 62 to be located on one side of the cleaning component 3.

[0036] During the filtration process, the lint-containing wastewater from the textile printing and dyeing workshop enters the tank 1 through the inlet pipe 11. The liquid level sensor 14 monitors the liquid level in the tank 1 in real time. The wastewater flows to the bottom in the tank 1. When it flows through the frustum-shaped support frame 21, the mesh of the filter screen 22 is tangential to the support frame 21 at that point, which guides the wastewater to form a stable vortex. The centrifugal force generated by the vortex throws the lint, short fibers and other impurities in the wastewater toward the surface of the filter screen 22 and the support frame 21, causing them to concentrate and entangle, thus achieving the separation of impurities from wastewater.

[0037] When the filter press operates continuously for a period of time, the accumulation of lint leads to a decrease in filtration efficiency. The cleaning process is then initiated, which drives the cylinder 33 to start and causes the mounting ring 31 to slide upward in the vertical direction. The mounting ring 31 drives the cleaning rod 32 to move upward in sync. The protrusions 34 on the cleaning rod 32 hook onto the lint wrapped around the support frame 21 and the filter screen 22. Because the protrusions 34 are exposed and the cleaning rod 32 coincides with the busbar, the expansion of lint can be restricted. Under the upward pulling force, the lint gradually detaches from the support frame 21 and the filter screen 22 and moves upward together with the cleaning rod 32.

[0038] When the cleaning rod 32 moves up to the preset lint removal position, the sliding plate 61 drives the receiving basin 62 to move directly below the cleaning rod 32 to prepare for lint collection. The release cylinder 53 is activated, causing the release frame 51 to slide vertically. The protrusion 52 on the release frame 51 abuts against the pawl 42, forcing the pawl 42 to overcome the elastic force of the spring 43 and disengage from the ratchet 41, thus releasing the rotation restriction on the cleaning rod 32. Under the gravity of the counterweight 54, the free end of the cleaning rod 32 rotates towards the axis of the support frame 21. Several cleaning rods 32 together form an inverted frustum shape. The lint that was originally wrapped around the cleaning rod 32 and the protrusion 34 loses its support and falls off under its own gravity into the receiving basin 62 below, completing the separation of the lint from the cleaning rod 32.

[0039] After de-fluffing is completed, the release cylinder 53 is activated in reverse, causing the release frame 51 to reset. The protrusion 52 disengages from the pawl 42, and the pawl 42 re-engages with the ratchet 41 under the elastic force of the spring 43, restoring the rotation restriction on the cleaning rod 32. This causes the cylinder 33 to drive the mounting ring 31 to slide downwards in the vertical direction, and the cleaning rod 32 moves downwards accordingly. Its free end contacts the guide slope 24 on the support frame 21. Under the guidance and squeezing action of the slope, the cleaning rod 32 gradually rotates around the mounting ring 31, adjusting its posture from an inverted frustum shape to coincide with the generatrix of the support frame 21, and simultaneously enters the sliding groove 23 to reset. During the reset process of the cleaning rod 32, the scraper 35 adheres to the bottom of the sliding groove 23 to scrape away the residual dirt and fine lint in the groove, preventing the sliding groove 23 from becoming clogged.

[0040] This application also discloses a multi-stage treatment process for dyeing and printing wastewater, comprising the following process steps: S1: Wastewater pretreatment, the workshop wastewater is passed into one of the above-mentioned filter presses to remove the lint from the wastewater; S2: Pass the filtered wastewater into the equalization tank to balance the wastewater quality and reduce water quality peaks; S3: Pass the wastewater from the equalization tank into the shallow air flotation equipment and add ferrous iron and polymeric agents to adjust the pH value of the wastewater and improve the coagulation and flocculation effect. S4: The sludge and wastewater in the shallow air flotation equipment are extracted into the anaerobic tank, and the metabolic action of anaerobic microorganisms is used to decompose the macromolecules and recalcitrant organic matter in the wastewater. S5: Anaerobic effluent enters the aerobic tank, where microorganisms convert the remaining organic matter in the wastewater into harmless substances such as carbon dioxide and water in an aerobic environment. S6: Aerobic effluent flows into the secondary sedimentation tank, which provides space for solid-liquid separation of wastewater. Some of the settled sludge can be returned to the aerobic tank. S7: The sludge scraper in the secondary sedimentation tank scrapes the remaining sludge to the sludge collection area, which facilitates sludge collection. The collected sludge can be further dewatered and treated to reduce secondary pollution.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A filter wool machine, characterized in that: The system includes a housing (1), a filter assembly (2), and a cleaning assembly (3). The housing (1) has an inlet pipe (11) connected to a workshop sewage pipe on its side wall, and an outlet pipe (12) connected to a regulating tank at its bottom. The filter assembly (2) includes a support frame (21) and several filter screens (22). The support frame (21) is frustum-shaped, and its bottom covers the outlet pipe (12). Several filter screens (22) are circumferentially distributed along the axis of the support frame (21) and are mounted on the support frame (21). Several sliding grooves (23) are provided on the support frame (21). The nets (22) are distributed alternately. The cleaning component (3) includes a mounting ring (31), a number of cleaning rods (32) and a driving cylinder (33). The mounting ring (31) is coaxially arranged with the support frame (21). The mounting ring (31) is slidably connected to the box (1) in the vertical direction. One end of the number of cleaning rods (32) is set on the mounting ring (31). The cleaning rods (32) are provided with protrusions (34) for hooking hair. The sliding groove (23) is used to accommodate the cleaning rods (32). The generatrix of the cleaning rods (32) and the support frame (21) coincides so that the protrusions (34) are exposed outside the support frame (21). The driving cylinder (33) is used to drive the mounting ring (31) to move.

2. The filter machine according to claim 1, characterized in that: One end of the cleaning rod (32) is rotatably connected to the mounting ring (31) along the tangential direction of the mounting ring (31). The mounting ring (31) is provided with a limiting member (4) that restricts the cleaning rod (32) from rotating toward the axis of the support frame (21). The limiting member (4) includes a plurality of ratchet teeth (41), a pawl (42), and a spring (43). The plurality of ratchet teeth (41) are distributed circumferentially along the rotation axis of the cleaning rod (32). The ratchet teeth (41) are provided on the cleaning rod (32). The pawl (42) is rotatably connected to the mounting ring (31). The spring (43) is used to keep the pawl (42) locked on the ratchet teeth (41).

3. A filter press according to claim 2, characterized in that: The mounting ring (31) is provided with a release element (5) for disengaging the pawl (42) from the ratchet (41). The release element (5) includes a release frame (51), a plurality of protrusions (52) and a release cylinder (53). The release frame (51) is slidably connected to the mounting ring (31) in the vertical direction. The plurality of protrusions (52) correspond to the plurality of pawls (42). The protrusions (52) are provided on the release frame (51). The release cylinder (53) is used to drive the release frame (51) to slide. The protrusions (52) are used to abut against the pawls (42) and cause the pawls (42) to overcome the elastic force of the spring (43) and disengage from the ratchet (41).

4. A filter press according to claim 3, characterized in that: The cleaning rod (32) is provided with a counterweight (54). The counterweight (54) makes the free end of the cleaning rod (32) face the axis of the support frame (21) when the cleaning rod (32) is in a free rotation state. Several cleaning rods (32) in the free state form an inverted frustum shape.

5. A filter press according to claim 4, characterized in that: The sliding groove (23) passes through the top of the support frame (21), and the support frame (21) is provided with a guide slope (24). The guide slope (24) facilitates the guidance of several cleaning rods (32) forming an inverted frustum shape into the sliding groove (23).

6. A filter press according to claim 1, characterized in that: The mesh orientation of the filter screen (22) is the tangential direction of the corresponding position of the frustum-shaped support frame (21).

7. A filter press according to claim 1, characterized in that: The cleaning rod (32) is provided with a scraper (35) at its free end, which is used to scrape off dirt or lint remaining in the sliding groove (23).

8. A filter press according to claim 1, characterized in that: The box (1) is provided with a receiving component (6) for receiving fallen lint. The receiving component (6) includes a sliding plate (61), a receiving basin (62), and a driving component (63). The sliding plate (61) is slidably connected to the box (1) in the horizontal direction. The receiving basin (62) is placed on the sliding plate (61). The driving component (63) is used to drive the sliding plate (61) to move.

9. A filter press according to claim 8, characterized in that: The driving component (63) includes a driving screw (631) and a driving motor (632). The length direction of the driving screw (631) is parallel to the sliding direction of the sliding plate (61). The driving screw (631) is rotatably connected to the housing (1). The sliding plate (61) is threadedly connected to the driving screw (631). The driving motor (632) is used to drive the driving screw (631) to rotate.

10. A multi-stage treatment process for dyeing and printing wastewater, characterized in that: Includes the following steps S1: Wastewater pretreatment, the workshop wastewater is fed into a filter press as described in any one of claims 1-9 to remove the lint from the wastewater; S2: Pass the filtered wastewater into the equalization tank to balance the wastewater quality and reduce water quality peaks; S3: Pass the wastewater from the equalization tank into the shallow air flotation equipment and add ferrous iron and polymeric agents to adjust the pH value of the wastewater and improve the coagulation and flocculation effect. S4: The sludge and wastewater in the shallow air flotation equipment are extracted into the anaerobic tank, and the metabolic action of anaerobic microorganisms is used to decompose the macromolecules and recalcitrant organic matter in the wastewater. S5: Anaerobic effluent enters the aerobic tank, where microorganisms convert the remaining organic matter in the wastewater into harmless substances such as carbon dioxide and water in an aerobic environment. S6: Aerobic effluent flows into the secondary sedimentation tank, which provides space for solid-liquid separation of wastewater. Some of the settled sludge can be returned to the aerobic tank. S7: The sludge scraper in the secondary sedimentation tank scrapes the remaining sludge to the sludge collection area, which facilitates sludge collection. The collected sludge can be further dewatered and treated to reduce secondary pollution.

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