A device for recovering waste water from a paper mill by sedimentation

Abstract

The utility model provides a kind of wastewater precipitation recovery device for paper mill, it is related to papermaking wastewater recovery technical field, and it includes: waste liquid precipitation body, the upper surface of waste liquid precipitation body is fixed with stirring motor, the lower end of stirring motor is connected with stirring paddle by stirring shaft, the inside of fine filter body is supported by transmission base insertion and has centrifugal filter cartridge, the lower end of transmission base is connected with centrifugal motor, the right side inner cylinder surface of centrifugal filter cartridge is contacted with long strip scraper, the left side inner cylinder end of centrifugal filter cartridge is provided with waste residue conveying cylinder, the inside of waste residue conveying cylinder is equipped with helical blade mechanism, the left side inner cavity wall of fine filter body is equipped with flushing nozzle by inclination frame, the upper end of inclination frame is connected with the inner cavity of fine filter body by circulating water pipe and communicates. The utility model solves the problem that the self-cleaning movement of the residue-water separation assembly vibration in the prior art is easy to aggravate the wear of the gear drive mechanism, affecting the service life of the recovery device.

Description

Technical Field

[0001] This utility model relates to the field of papermaking wastewater recycling technology, specifically to a wastewater sedimentation and recycling device for paper mills. Background Technology

[0002] In paper mill production, a large amount of water is used, requiring continuous treatment and reuse to solve the problem and avoid water waste. A search revealed existing technology (Announcement No.: CN202222012608.9) for a paper mill wastewater sedimentation and recovery device. The document describes how, "When the slag-water separation component reaches the lower end of the wastewater conveying component, a continuously rotating water-guiding component applies a driving force to the slag-water separation component, causing it to spiral upwards. The centrifugal force generated during this spiral ascent throws the wastewater off the receiving tray, achieving slag-water separation; when the slag-water separation component reaches the wastewater..." When the conveying component reaches the upper end, the slag-water separation component is subject to a stroke limit, resulting in an oscillation effect. This shakes off the slag adhering to the separation hood and inside the filter holes, achieving self-cleaning of the slag and effectively preventing slag from clogging the filter holes. At the same time, no downtime is required, ensuring processing efficiency. Subsequently, the slag-water separation component spirals down under its own gravity, causing the shaken-off slag to concentrate at the bottom of the separation hood under centrifugal force, thereby achieving the recovery of the settled slag. However, in the existing technology, the self-cleaning motion of the slag-water separation component's vibration and shaking can easily aggravate the wear of the gear drive mechanism, affecting the service life of the recovery device. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a wastewater sedimentation and recovery device for paper mills is provided to solve the problem that the self-cleaning motion of the slag-water separation component due to vibration can easily aggravate the wear of the gear drive mechanism and affect the service life of the recovery device.

[0004] To achieve the above objectives, a wastewater sedimentation and recovery device for paper mills is provided, comprising: a wastewater sedimentation body, wherein a fine filter body is provided at the lower end of the wastewater sedimentation body.

[0005] A stirring motor is fixed on the upper surface of the waste liquid sedimentation machine body. The lower end of the stirring motor is connected to a stirring blade via a stirring shaft. A centrifugal filter cylinder is inserted and supported inside the fine filter body via a transmission base. A centrifugal motor is shaft-connected to the lower end of the transmission base. A long scraper is in contact with the inner surface of the right side of the centrifugal filter cylinder. A waste residue conveying cylinder is provided at the inner end of the left side of the centrifugal filter cylinder. A spiral blade mechanism is installed inside the waste residue conveying cylinder. A flushing nozzle is installed on the inner wall of the left side of the fine filter body via an inclined frame. The upper end of the inclined frame is connected to the inner cavity of the fine filter body via a circulating water pipe.

[0006] Furthermore, the upper surface of the waste liquid sedimentation machine is provided with a liquid inlet and a guide hopper; and the liquid inlet and the guide hopper are located on the left and right sides of the stirring motor.

[0007] Furthermore, a feed pipe is fixed to the lower end face of the waste liquid sedimentation machine body, an electrically controlled valve is installed on the surface of the feed pipe, and a viewing window is provided on the front surface of the fine filter body.

[0008] Furthermore, a liquid outlet pipe is connected to the right end of the fine filter body; and a circulating water pipe is connected to the left end of the fine filter body, with a booster pump installed on the surface of the circulating water pipe.

[0009] Furthermore, a sealing top plate is screwed onto the upper surface of the fine filter body, and a waste liquid sedimentation body is fixedly supported on the upper surface of the sealing top plate. A waste residue conveying cylinder is fixedly inserted through the surface of the sealing top plate.

[0010] Furthermore, the front surface of the waste slag conveying cylinder is provided with a slag outlet, and the inclined surface of the inclined frame is longitudinally and equidistantly distributed with flushing nozzles.

[0011] Furthermore, a limiting arc block is welded to the outer end of the transmission base, and the transmission base is fixed to the centrifugal filter cartridge by bolts.

[0012] The beneficial effects of this utility model are as follows: the wastewater sedimentation and recovery device for paper mills utilizes a combination of chemical and physical treatment methods to treat papermaking wastewater using a waste liquid sedimentation machine and a fine filter machine. This allows suspended solids, fiber particles, and other impurities in the wastewater to be separated through flocculation, sedimentation, and centrifugal filtration, resulting in water quality that meets papermaking standards. This reduces water waste in paper mills. A waste residue conveying cylinder inserted inside the centrifugal filter cartridge transports and discharges the filtered waste residue. A circulating water pipe pumps the finely filtered papermaking water to a flushing nozzle to wash the screen surface of the centrifugal filter cartridge, flushing back any clogged waste residue and preventing it from falling into the filtered papermaking water. This facilitates effective cleaning of the centrifugal filter cartridge and discharge of waste residue, reducing cleaning damage to the wastewater sedimentation and recovery device, ensuring stable treatment of papermaking wastewater, and improving the device's durability. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of a wastewater sedimentation and recovery device for paper mills according to an embodiment of this utility model.

[0014] Figure 2 This is a front view cross-sectional structural diagram of a wastewater sedimentation and recovery device for paper mills according to an embodiment of this utility model.

[0015] Figure 3 This is a front view cross-sectional structural diagram of the fine filter body according to an embodiment of the present utility model.

[0016] Figure 4 This is a top view of the centrifugal filter cartridge according to an embodiment of the present invention.

[0017] In the diagram: 1. Waste liquid sedimentation machine body; 11. Liquid inlet; 12. Feed hopper; 13. Feed pipe; 14. Stirring motor; 15. Stirring shaft; 16. Stirring blade; 17. Electrically controlled valve; 2. Fine filter body; 21. Viewing window; 22. Liquid outlet pipe; 23. Long scraper; 24. Sealed top plate; 3. Centrifugal filter cartridge; 31. Centrifugal motor; 32. Transmission base; 33. Limiting arc block; 4. Waste residue conveying cylinder; 41. Slag outlet; 42. Spiral blade mechanism; 5. Flushing nozzle; 51. Circulating water pipe; 52. Booster pump; 53. Inclined frame. Detailed Implementation

[0018] Reference Figures 1 to 4 As shown, this utility model provides a wastewater sedimentation and recovery device for paper mills, including: a waste liquid sedimentation body 1, and a fine filter body 2 installed at the lower end of the waste liquid sedimentation body 1.

[0019] A stirring motor 14 is fixed on the upper surface of the waste liquid sedimentation machine body 1. The lower end of the stirring motor 14 is connected to the stirring blade 16 through the stirring shaft 15. A centrifugal filter cylinder 3 is inserted and supported on the inner side of the fine filter body 2 through the transmission base 32. A centrifugal motor 31 is shaft-connected to the lower end of the transmission base 32. A long scraper 23 is in contact with the inner cylinder surface on the right side of the centrifugal filter cylinder 3. A waste residue conveying cylinder 4 is set at the inner cylinder end on the left side of the centrifugal filter cylinder 3. A spiral blade mechanism 42 is installed inside the waste residue conveying cylinder 4. A flushing nozzle 5 is installed on the inner wall of the left side of the fine filter body 2 through the inclined frame 53. The upper end of the inclined frame 53 is connected to the inner cavity of the fine filter body 2 through the circulating water pipe 51.

[0020] First, papermaking wastewater is introduced into the wastewater sedimentation unit 1 through the inlet 11. Then, coagulant and neutralizing agent are added to the wastewater sedimentation unit 1. The stirring motor 14 drives the stirring blades 16 to mix the liquid in the wastewater sedimentation unit 1. This causes impurities in the wastewater to react and form precipitates, which are then discharged into the centrifugal filter cartridge 3 inside the fine filter unit 2. The centrifugal filter cartridge 3 separates the discharged wastewater and precipitates by centrifugation. The wastewater is discharged from the outlet pipe 22, and the precipitates and impurities are filtered out. Inside the centrifugal filter cartridge 3, during centrifugal filtration, the centrifugal filter cartridge 3 pressurizes and delivers the separated water to the flushing nozzle 5, causing the flushing nozzle 5 to flush the mesh surface of the centrifugal filter cartridge 3, washing away the impurities clogging the mesh and ensuring that the water flows smoothly out of the mesh of the centrifugal filter cartridge 3. After separation, the spiral blade mechanism 42 inside the waste residue conveying cylinder 4 conveys the sediment in the cylinder upward, allowing the sediment to be discharged from the slag outlet 41 into the centrifugal filter cartridge 3, facilitating the cleaning of the residue inside the centrifugal filter cartridge 3, thus completing the sedimentation and recycling treatment of papermaking wastewater.

[0021] In this embodiment, the upper end face of the waste liquid sedimentation machine body 1 is provided with a liquid inlet 11 and a guide hopper 12; and the liquid inlet 11 and the guide hopper 12 are located on the left and right sides of the stirring motor 14. A feed pipe 13 is fixed on the lower end face of the waste liquid sedimentation machine body 1, and an electrically controlled valve 17 is installed on the surface of the feed pipe 13. A viewing window 21 is provided on the front surface of the fine filter body 2.

[0022] In a preferred embodiment, the stirring motor 14 drives the stirring shaft 15 to move the stirring blades 16 to mix the liquid and added treatment agents in the wastewater sedimentation body 1. The inlet 11 and the feed hopper 12 introduce papermaking wastewater, coagulants, neutralizing agents, and other treatment agents. The electrically controlled valve 17 controls the discharge pipe 13 to discharge the settled wastewater mixture into the centrifugal filter cartridge 3 inside the fine filter body 2 for separation and filtration.

[0023] In this embodiment, the right end of the fine filter body 2 is connected to the liquid outlet pipe 22; and the left end of the fine filter body 2 is connected to the circulating water pipe 51, and a booster pump 52 is installed on the surface of the circulating water pipe 51.

[0024] As a preferred implementation, the outlet pipe 22 facilitates the discharge and recycling of treated water. The booster pump 52 facilitates the pressurization and pumping of the water separated by filtration in the fine filter body 2 into the circulating water pipe 51, so that the circulating water pipe 51 delivers the water to the flushing nozzle 5, so that the flushing nozzle 5 washes the screen surface of the centrifugal filter cartridge 3, cleaning and unblocking the impurities and residues clogging the screen.

[0025] In this embodiment, a sealing top plate 24 is screwed onto the upper surface of the fine filter body 2. A waste liquid sedimentation body 1 is fixedly supported on the upper surface of the sealing top plate 24. A waste residue conveying cylinder 4 is fixedly inserted through the surface of the sealing top plate 24. A slag outlet 41 is opened on the front cylinder surface of the slag conveying cylinder 4, and flushing nozzles 5 are longitudinally and equidistantly distributed on the inclined surface of the inclined frame 53.

[0026] As a preferred implementation, the spiral blade mechanism 42 inside the waste slag conveying cylinder 4 facilitates the upward conveying of the sediment inside the cylinder, allowing the sediment to be discharged from the slag outlet 41 into the centrifugal filter cylinder 3. This makes it easier to clean the impurities and residues filtered out of the centrifugal filter cylinder 3 and reduces the intensity of manual cleaning.

[0027] In this embodiment, a limiting arc block 33 is welded to the outer end of the transmission base 32, and the transmission base 32 is fixed to the centrifugal filter cartridge 3 by bolts.

[0028] As a preferred embodiment, the transmission base 32 drives the centrifugal filter cartridge 3 to rotate centrifugally via the centrifugal motor 31. The high-speed rotation of the centrifugal filter cartridge 3 generates a strong centrifugal force that can process a large amount of liquid in a short time, separating impurities from the liquid.

[0029] This utility model of wastewater sedimentation and recovery device for paper mills effectively solves the problem in the prior art where the self-cleaning motion of the slag-water separation component vibrates and shakes off the gear drive mechanism, which easily aggravates the wear of the recovery device and affects its service life. It facilitates effective cleaning of the centrifugal filter cartridge and discharges the waste residue inside the cartridge, reduces cleaning damage to the wastewater sedimentation and recovery device, ensures stable treatment of papermaking wastewater by the wastewater sedimentation and recovery device, and improves the durability of the wastewater sedimentation and recovery device. It is suitable for wastewater sedimentation and recovery devices used in paper mills.

Claims

1. A wastewater sedimentation and recovery device for paper mills, comprising: Waste liquid sedimentation body (1), wherein a fine filter body (2) is provided at the lower end of the waste liquid sedimentation body (1), characterized in that: The upper surface of the waste liquid sedimentation machine body (1) is fixed with a stirring motor (14). The lower end of the stirring motor (14) is connected to a stirring blade (16) through a stirring shaft (15). The inner side of the fine filter body (2) is supported by a centrifugal filter cylinder (3) through a transmission base (32). The lower end of the transmission base (32) is connected to a centrifugal motor (31). The inner surface of the right side of the centrifugal filter cylinder (3) is in contact with a long scraper (23). The inner end of the left side of the centrifugal filter cylinder (3) is provided with a waste residue conveying cylinder (4). The inner side of the waste residue conveying cylinder (4) is equipped with a spiral blade mechanism (42). The inner wall of the left side of the fine filter body (2) is equipped with a flushing nozzle (5) through an inclined frame (53). The upper end of the inclined frame (53) is connected to the inner cavity of the fine filter body (2) through a circulating water pipe (51).

2. The wastewater sedimentation and recovery device for paper mills according to claim 1, characterized in that, The waste liquid sedimentation machine body (1) has an inlet (11) and a guide hopper (12) on its upper end face; and the inlet (11) and the guide hopper (12) are located on the left and right sides of the stirring motor (14).

3. The wastewater sedimentation and recovery device for paper mills according to claim 1, characterized in that, The waste liquid sedimentation machine body (1) has a feed pipe (13) fixed on its lower end face, and an electric control valve (17) is installed on the surface of the feed pipe (13). The fine filter body (2) has a viewing window (21) on its front surface.

4. The wastewater sedimentation and recovery device for paper mills according to claim 1, characterized in that, The fine filter body (2) is connected to a liquid outlet pipe (22) on the right side; and a circulating water pipe (51) is connected to the left side of the fine filter body (2), and a booster pump (52) is installed on the surface of the circulating water pipe (51).

5. The wastewater sedimentation and recovery device for paper mills according to claim 1, characterized in that, The upper surface of the fine filter body (2) is screwed with a sealing top plate (24), the upper surface of the sealing top plate (24) is fixedly supported by a waste liquid sedimentation body (1), and a waste residue conveying cylinder (4) is fixedly inserted through the surface of the sealing top plate (24).

6. The wastewater sedimentation and recovery device for paper mills according to claim 1, characterized in that, The waste conveying cylinder (4) has a slag outlet (41) on its front cylinder surface, and the inclined frame (53) has flushing nozzles (5) distributed longitudinally and equidistantly on its inclined surface.

7. The wastewater sedimentation and recovery device for paper mills according to claim 1, characterized in that, The transmission base (32) has a limiting arc block (33) welded to the outer end, and the transmission base (32) is fixed to the centrifugal filter cylinder (3) by bolts.

Images