Sludge flocculation stirring device integrated with self-cutting filtering device

Abstract

The invention relates to a sludge flocculation stirring device integrated with a self-cutting filtering device. The device comprises a flocculation cylinder, a stirring central shaft, a driving device, a filtering device and a stirring part, the filtering device consists of a plurality of groups of ring sheet assemblies with sawtooth-shaped cutting parts, and movable ring sheets and static ring sheets are arranged in a staggered manner to form filtering gaps; the device adopts a stepped graded filtering structure, can effectively treat sludge with the water content being greater than or equal to 97%, and realizes integrated operation of flocculation and dehydration; when the device works, the driving device drives the stirring central shaft to rotate, so that the flocculation stirring of sludge is realized, and the blockage of filter seams is prevented through the self-cutting effect generated by the relative movement of the ring pieces. The self-cutting filter screen has the beneficial effects that the problem that a traditional filter screen is easy to block is solved through a self-cutting mechanism, and the filtering efficiency is improved; the water content of the dewatered sludge is reduced to be below 80% through the graded filtering structure; the whole device has the functions of flocculation mixing and continuous dehydration, and the energy consumption and the maintenance cost are reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of high-moisture-content sludge treatment, and particularly relates to a sludge flocculation and stirring device integrated with a self-cutting filter device. BACKGROUND

[0002] In the field of sludge treatment, flocculation stirrers are widely used in the pretreatment of sludge with a moisture content of greater than or equal to 97% in secondary sedimentation tanks, primary sedimentation tanks and homogenizing tanks.

[0003] Traditional flocculation stirrers such as belt filter presses and plate-and-frame filter presses only have stirring devices but no pre-dewatering devices, and have a single function, that is, the mixing and flocculation of sludge and PAM reagents through mechanical stirring, so that the sludge forms flocculation to facilitate subsequent pressing and dewatering, and finally the moisture content of the sludge is reduced to about 80% to meet the requirements of landfill. However, for high-moisture-content sludge with a moisture content of greater than or equal to 97%, direct flocculation and pressing have problems such as low dewatering efficiency and high energy consumption.

[0004] To improve efficiency, existing improved schemes are provided with a pre-dewatering device on the upper part of the flocculation cylinder, such as a 24-mesh steel wire mesh (pore size of about 0.7 mm x 0.7 mm) as a dewatering main part. However, the steel wire mesh is easily blocked by fibers, hairs and other impurities in the flocculation sludge in actual application, and the cleaning effect of manual cleaning or an additional spraying system is still not ideal, making it difficult to maintain continuous operation.

[0005] In addition, such devices lack an online self-cleaning device, and frequent shutdown and maintenance are required after the filter gap is blocked, which seriously affects the processing efficiency and automation level.

[0006] Therefore, there is an urgent need for an integrated equipment that can simultaneously achieve efficient flocculation, self-blocking prevention and continuous dewatering. SUMMARY

[0007] The purpose of the present application is to overcome the deficiencies in the prior art and provide a sludge flocculation and stirring device integrated with a self-cutting filter device.

[0008] The sludge flocculation and stirring device integrated with a self-cutting filter device comprises:

[0009] a flocculation cylinder, the lower part of the flocculation cylinder being provided with a sludge inlet and a reagent inlet, the upper part of the flocculation cylinder being provided with a sludge outlet, and the bottom of the flocculation cylinder being provided with a vent;

[0010] a stirring central shaft arranged inside the flocculation cylinder;

[0011] a driving device arranged outside the flocculation cylinder, the output shaft of the driving device being rigidly and coaxially connected in transmission with the stirring central shaft;

[0012] The filter device is sleeved on the upper middle side of the stirring central shaft, can separate the gathered sludge and water after flocculation, and can be retained outside the filter cylinder. The flocculated sludge exists in the form of floc, a large amount of free water is filtered out in the flocculation cylinder, and the sludge dewatering efficiency of subsequent equipment is improved.

[0013] The frame is fixedly arranged on the inner side wall of the flocculation cylinder, and the stirring central shaft is located on the symmetry axis of the frame.

[0014] The stirring part is fixedly connected to the bottom end of the stirring central shaft and arranged in the middle lower part of the flocculation cylinder.

[0015] The filter device is composed of at least one set of integrated self-cutting filter elements. Each set of filter elements includes stationary ring pieces, moving ring pieces, stationary ring piece end plates, moving ring piece end plates, at least two stationary ring piece positioning rods, and at least two moving ring piece positioning rods. A plurality of stationary ring pieces are detachably connected to the stationary ring piece positioning rods and are located inside all the stationary ring piece positioning rods. The stationary ring pieces are fixed to the stationary ring piece end plates through the stationary ring piece positioning rods. The stationary ring piece end plates are detachably connected to the frame connecting rods, which are fixedly connected to the frame. A plurality of moving ring pieces are detachably connected to the moving ring piece positioning rods and are located outside all the moving ring piece positioning rods. The moving ring pieces are fixed to the moving ring piece end plates through the moving ring piece positioning rods. The moving ring piece end plates are fixedly connected to the shaft sleeve of the stirring central shaft, and the shaft sleeve is detachably connected to the stirring central shaft through bolts.

[0016] There is a specific width of stationary ring piece gap between adjacent stationary ring pieces on the stationary ring piece positioning rod, and there is a specific width of moving ring piece gap between adjacent moving ring pieces on the moving ring piece positioning rod. Along the axial direction of the stirring central shaft, a plurality of moving ring pieces are nested inside a plurality of stationary ring pieces, and a plurality of moving ring pieces, moving ring piece positioning rods, a plurality of stationary ring pieces, and stationary ring piece positioning rods form a filter gap. In the radial direction of the stirring central shaft, one moving ring piece is located between two stationary ring pieces. The side of the stationary ring piece and the moving ring piece close to the filter gap is provided with a cutting part matched in shape, which is used to cut the blockage at the filter gap. While the sludge flocculation stirrer is started to stir and flocculate, the stirring central shaft is used to drive all the moving ring pieces to rotate under the drive of the driving device (i.e., the reducer of the stirrer), i.e., to drive all the moving ring pieces to rotate relative to the stationary ring pieces. Through the rotation of the moving ring pieces, centrifugal force and shear force are generated, and the filter is cut and cleaned continuously, and the dirt in the filter gap is continuously removed.

[0017] The frame, the frame connecting rod, and the water outlet side of the filter device enclose a water collecting cylinder, the stirring central shaft passes through the water collecting cylinder, and the water collecting cylinder is provided with a corresponding drain.

[0018] As preferred: the cutting part on the side of the stationary ring piece and the moving ring piece close to the filtering gap is arc-shaped, oval-shaped, sinusoidal-shaped, jagged or rectangular.

[0019] As preferred: the cutting part is jagged.

[0020] As preferred: when the filtering device includes two or more groups of integrated self-cutting filtering pieces, the multiple groups of integrated self-cutting filtering pieces that constitute the filtering device are:

[0021] The stationary ring piece positioning rod of the first group of filtering pieces is fixedly connected to the rack connecting rod through the stationary ring piece end plate at the front end of the stationary ring piece positioning rod; starting from the second group, the stationary ring piece end plate at the front end of the stationary ring piece positioning rod of the next group of filtering pieces is fixedly connected to the stationary ring piece end plate at the rear end of the stationary ring piece positioning rod of the previous group; the rear end of the stationary ring piece positioning rod of the last group of filtering pieces is fixedly connected to its own stationary ring piece end plate; along the axial direction of the stirring central shaft, the closer to the stirring part, the smaller the outer diameter of the stationary ring piece in the filtering piece, and the outer diameter of the stationary ring piece in the multiple groups of integrated self-cutting filtering pieces decreases in turn along the axial direction of the stirring central shaft.

[0022] The moving ring piece positioning rod of each group of filtering pieces is fixedly connected to the shaft sleeve of the stirring central shaft through the moving ring piece end plates at the front end and the rear end of the moving ring piece positioning rod; along the axial direction of the stirring central shaft, the closer to the stirring part, the smaller the outer diameter of the moving ring piece in the filtering piece, and the outer diameter of the stationary ring piece in the multiple groups of integrated self-cutting filtering pieces decreases in turn along the axial direction of the stirring central shaft.

[0023] Each group of integrated self-cutting filtering pieces is arranged in a stepped manner along the axial direction of the stirring central shaft.

[0024] As preferred: the sludge flocculation and stirring device is a vertical structure (vertical flocculation and stirring machine).

[0025] As preferred: the rack is fixedly arranged on the inner side wall of the top of the flocculation cylinder; the bottom end of the stirring central shaft is fixedly connected to the stirring part through a flange; the output shaft of the driving device is rigidly coaxially connected to the stirring central shaft through a flange; the outer side of the flocculation cylinder is further provided with a support frame fixed thereto for supporting the entire flocculation cylinder; the bottom of the support frame is further provided with multiple supporting legs for supporting the support frame fixedly connected to the flocculation cylinder on the ground or a specified horizontal surface.

[0026] The working method of the sludge flocculation and stirring device of the integrated self-cutting filtering device includes the following steps:

[0027] The sludge with a high water content (water content ≥ 97%) is transported into the flocculation cylinder through the sludge inlet, and the reagent is added into the flocculation cylinder through the reagent inlet, and the water, sludge and reagent enter the flocculation cylinder at the same time;

[0028] Then the driving device is started, the driving device drives the stirring central shaft to rotate, the stirring central shaft drives the stirring part to stir and mix rapidly, sludge is rapidly separated from water to form flocculent sludge, and water and the flocculent sludge are layered to form a free water layer (a large amount of water in the free water layer is still mixed with sludge) located on the upside and a sludge layer located on the downside;

[0029] The water in the free water layer is driven by the spiral flow generated by the stirring central shaft and continuously rises in liquid level under the condition that the input amount of the water-containing sludge gradually increases to pass through the filtering device, the rotation of the stirring central shaft drives the moving ring piece in the filtering device to rotate relative to the stationary ring piece, the residual sludge in the free water layer is intercepted by the filtering device and remains in the filtering gap, while the filtering device is filtering, the respective cutting parts on the moving ring piece and the stationary ring piece cut the sludge in the filtering gap due to the rotation of the moving ring piece relative to the stationary ring piece, the sludge in the filtering gap returns to the free water layer under the driving of the spiral flow and gradually precipitates to the sludge layer under the action of gravity; the filtering device can effectively filter and separate clean water and intercept sludge (matter) outside the outer cylinder of the filtering device;

[0030] The water in the free water layer is filtered by the filtering device to become clean water, the clean water flows into the inner cavity of the filtering device, enters the water collecting cylinder, and is continuously discharged from the water outlet;

[0031] The flocculent sludge in the sludge layer is discharged from the venting port for subsequent treatment.

[0032] As preferred: after the water-containing sludge is treated by flocculation and filtration in the sludge flocculation and stirring device integrated with the self-cutting filtering device, the sludge flocculation and stirring device is further cleaned; the sludge outlet is used to discharge the sludge cleaned from the flocculation cylinder.

[0033] The beneficial effects of the present application are:

[0034] The application designs an integrated self-cutting filter device and sludge flocculation stirring device, which simultaneously realizes efficient dewatering and anti-blocking requirements; Specifically, the sawtooth-shaped cutting parts on the moving ring piece and the stationary ring piece produce relative motion under the driving of the stirring center shaft, dynamically cutting the pollutants such as fibers and hairs in the filter gap, effectively avoiding the traditional filter screen blockage problem, and significantly reducing the frequency of shutdown cleaning. A plurality of filter pieces are arranged in a stepped manner along the axial direction, and the pollutants are classified and intercepted by the gradually decreasing outer diameter of the ring piece and the filter gap, efficiently separating flocculent sludge and free water, and the actual measurement shows that the water content of the dewatered sludge can be reduced from more than 97% to less than 80%. In the application, the filter device and the flocculation cylinder are designed in an integrated manner, the rack and the shaft sleeve are fixed in a compact manner, and the functions of stirring flocculation and continuous dewatering are realized, reducing the dependence on external equipment, reducing energy consumption and operation and maintenance cost. The detachable ring piece structure and the buffer sealing structure support rapid maintenance, ensuring long-term stable operation of the device in high-load sludge treatment. The application finally overcomes the technical bottleneck of low dewatering efficiency and frequent blockage in high-moisture sludge treatment, and provides an innovative solution for sludge pretreatment process. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the sludge flocculation stirring device integrated with the self-cutting filter device.

[0036] Figure 2 It is a structural schematic diagram of the filter device.

[0037] Figure 3 It is an enlarged diagram of the stationary ring piece and the moving ring piece assembled in the filter device.

[0038] Figure 4 It is an assembly diagram of the moving ring piece.

[0039] Figure 5 It is an assembly diagram of the stationary ring piece.

[0040] Figure 6 It is a top view of the sludge flocculation stirring device.

[0041] Figure 7 It is a schematic diagram of the stationary ring piece with a sawtooth-shaped cutting part.

[0042] Figure 8 It is a schematic diagram of the moving ring piece with a sawtooth-shaped cutting part.

[0043] Explanation of reference numerals in the attached drawings: 1. Stationary ring plate; 2. Stirring center shaft; 3. Moving ring plate; 4. Filter device; 5. Stationary ring plate positioning rod; 6. Moving ring plate positioning rod; 7. Water collection cylinder; 8. Flocculation cylinder; 9. Stirring section; 10. Flange; 11. Drive device; 12. Support frame; 13. Support leg; 14. Drain outlet; 15. Dosing port; 16. Mud inlet; 17. Mud outlet; 18. Vent outlet; 19. Liquid level; 20. Vertical flocculation mixer; 21. Moving ring plate end plate; 22. Stationary ring plate end plate; 23. Frame connecting rod; 24. Frame; 25. Cutting section. Detailed Implementation

[0044] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0045] Example 1

[0046] like Figures 1 to 8 As shown, a sludge flocculation and mixing device integrating a self-cutting filter is a vertical flocculation mixer 20, vertically installed, with external inlet and internal outlet, comprising:

[0047] The flocculation cylinder 8 has a mud inlet 16 and a chemical dosing inlet 15 in its lower part, a mud outlet 17 in its upper part, and a vent 18 at its bottom. A support frame 12 is also provided on the outside of the flocculation cylinder 8 to support the entire flocculation cylinder. The bottom of the support frame 12 is also provided with multiple support legs 13 to support the support frame that is fixed to the flocculation cylinder on the ground or a set horizontal surface.

[0048] The stirring center shaft 2 is located inside the flocculation cylinder 8;

[0049] The drive device 11 is located outside the flocculation cylinder 8, and the output shaft of the drive device 11 is rigidly coaxially connected to the stirring center shaft 2 through the flange 10.

[0050] The filter device 4 is sleeved on the upper side of the mixing center shaft 2. It can aggregate and separate the flocculated sludge and water. The flocculated sludge exists in flocculent form and can be trapped outside the filter cylinder. A large amount of free water is filtered out inside the flocculation cylinder, which improves the sludge dewatering efficiency of subsequent equipment.

[0051] The frame 24 is fixedly installed on the inner side wall of the top of the flocculation cylinder 8, and the stirring center shaft 2 is located on the axis of symmetry of the frame 24;

[0052] The stirring section 9 is fixedly connected to the bottom end of the stirring center shaft 2 via flange 10 and is located in the lower middle part of the flocculation cylinder 8; wherein:

[0053] The filtering device 4 is composed of three groups of integrated self-cutting filtering pieces; each group of filtering pieces includes a stationary ring piece 1, a moving ring piece 3, a stationary ring piece end plate 22, a moving ring piece end plate 21, four stationary ring piece positioning rods 5, and four moving ring piece positioning rods 6; a plurality of stationary ring pieces 1 are detachably connected to the stationary ring piece positioning rods 5 and are located inside all the stationary ring piece positioning rods 5, the stationary ring pieces 1 are fixed on the stationary ring piece end plate 22 through the stationary ring piece positioning rods 5, the stationary ring piece end plate 22 is detachably connected to the rack connecting rod 23, and the rack connecting rod 23 is fixedly connected to the rack 24; a plurality of moving ring pieces 3 are detachably connected to the moving ring piece positioning rods 6 and are located outside all the moving ring piece positioning rods 6, the moving ring pieces 3 are fixed on the moving ring piece end plate 21 through the moving ring piece positioning rods 6, the moving ring piece end plate 21 is fixedly connected to the shaft sleeve of the stirring center shaft 2, and the shaft sleeve is detachably connected to the stirring center shaft 2 through bolts; among the three groups of integrated self-cutting filtering pieces that constitute the filtering device 4: the stationary ring piece positioning rods 5 of the first group of filtering pieces are fixedly connected to the rack connecting rod 23 through the stationary ring piece end plate 22 located at the front end thereof, the stationary ring piece end plate 22 at the front end of the next group of filtering pieces is fixedly connected to the stationary ring piece end plate 22 at the rear end of the stationary ring piece positioning rods 5 of the previous group, and the rear end of the stationary ring piece positioning rods 5 of the last group of filtering pieces is fixedly connected to its own stationary ring piece end plate 22; along the axial direction of the stirring center shaft 2, the closer to the stirring part 9, the smaller the outer diameter of the stationary ring piece 1 in the filtering piece, and the outer diameter of the stationary ring piece in the multiple groups of integrated self-cutting filtering pieces decreases in turn along the axial direction of the stirring center shaft; the moving ring piece positioning rods 6 of each group of filtering pieces are fixedly connected to the shaft sleeve of the stirring center shaft 2 through the moving ring piece end plates 21 located at the front end and the rear end thereof; along the axial direction of the stirring center shaft 2, the closer to the stirring part 9, the smaller the outer diameter of the moving ring piece 3 in the filtering piece, and the outer diameter of the stationary ring piece in the multiple groups of integrated self-cutting filtering pieces decreases in turn along the axial direction of the stirring center shaft; the three groups of integrated self-cutting filtering pieces are arranged in a stepped manner along the axial direction of the stirring center shaft 2;

[0054] There is a certain width of the stationary ring gap between adjacent stationary ring pieces 1 on the stationary ring piece positioning rod 5, and a certain width of the moving ring gap between adjacent moving ring pieces 3 on the moving ring piece positioning rod 6; along the axial direction of the stirring center shaft 2, a plurality of moving ring pieces 3 are nested inside a plurality of stationary ring pieces 1, and a plurality of moving ring pieces 3, moving ring piece positioning rod 6, a plurality of stationary ring pieces 1 and stationary ring piece positioning rod 5 form a filter gap; and in the radial direction of the stirring center shaft 2, one moving ring piece 3 is located between two stationary ring pieces 1; The side of the stationary ring piece 1 and the moving ring piece 2 close to the filter gap is provided with a sawtooth cutting part 25 matched in shape, and the cutting part 25 is used to cut the blockage at the filter gap; When the sludge flocculation stirrer is started to make the stirring part stir and flocculate, the stirring center shaft 2 is used to drive all the moving ring pieces 3 to rotate under the drive of the driving device 11 (i.e. the reducer of the stirrer), that is, all the moving ring pieces are driven to rotate relative to the stationary ring pieces, and the centrifugal force and shear force are generated by the rotation of the moving ring pieces, and the filter is cut and cleaned while stirring and flocculating, and the filter gap is continuously cleaned and the dirt in the filter gap is continuously removed.

[0055] The rack 24, the rack connecting rod 23 and the water outlet side of the filter device 4 form a water collecting cylinder 7, and the stirring center shaft 2 passes through the water collecting cylinder 7. The water collecting cylinder 7 is provided with a corresponding drain port 14.

[0056] Embodiment 2

[0057] On the basis of embodiment 1, the working method of the vertical flocculation stirrer 20 comprises the following steps:

[0058] The sludge with high water content (water content ≥97%) is transported into the flocculation cylinder 8 through the mud inlet 16, and the reagent is added into the flocculation cylinder 8 through the reagent inlet 15, and the water, sludge and reagent are simultaneously introduced into the flocculation cylinder 8;

[0059] Then the driving device 11 is started, the driving device 11 drives the stirring center shaft 2 to rotate, the stirring center shaft 2 drives the stirring part 9 to stir and mix quickly, the sludge is quickly separated from the water to form flocculent sludge, and the water and the flocculent sludge are layered to form a free water layer (a large amount of water is still mixed with the sludge) on the upper side and a sludge layer on the lower side;

[0060] The water in the free water layer is driven by the rotation flow generated by the stirring central shaft 2 and the rising liquid level caused by the increasing amount of water-containing sludge, and passes through the filter device 4, the rotation of the stirring central shaft 2 drives the moving ring 3 in the filter device 4 to rotate relative to the stationary ring 1, the residual sludge in the free water layer is intercepted by the filter device 4 and stays in the filter gap, while the filter device 4 is filtering, the cutting parts 25 on the moving ring 3 and the stationary ring 1 cut the sludge in the filter gap due to the rotation of the moving ring 3 relative to the stationary ring 1, the sludge in the filter gap returns to the free water layer under the driving of the rotation flow and gradually precipitates to the sludge layer under the action of its own gravity; the filter device can effectively filter and separate clean water and intercept sludge (material) outside the filter device outer cylinder;

[0061] The water in the free water layer is filtered by the filter device 4 to become clean water, the clean water flows into the inner cavity of the filter device 4 and then enters the water collecting cylinder 7, and is continuously discharged from the water outlet 14;

[0062] The flocculent sludge in the sludge layer is discharged from the vent port 18 for subsequent treatment;

[0063] After the sludge flocculation and stirring device integrated with the self-cutting filter device is used to flocculate and filter the water-containing sludge, a cleaning step for the sludge flocculation and stirring device is further included; the sludge outlet 17 is used to discharge the sludge cleaned out after cleaning the flocculation cylinder 8.

Claims

1. A sludge flocculation and agitation device integrated with a self-cutting filtration device, characterized by, The application relates to a sludge flocculation device. The sludge flocculation device comprises a flocculation cylinder, a stirring central shaft, a driving device and a filtering device. The flocculation cylinder is internally provided with a sludge inlet, a chemical inlet and a sludge outlet, and is externally provided with a venting hole. The stirring central shaft is arranged in the flocculation cylinder. The driving device is arranged outside the flocculation cylinder and is rigidly coaxially connected with the stirring central shaft. The filtering device is arranged on the upper side of the stirring central shaft. The machine frame is fixedly arranged on the inner wall of the flocculation cylinder and the stirring central shaft is arranged on the symmetry axis of the machine frame. The stirring part is fixedly connected with the bottom end of the stirring central shaft and is arranged in the middle lower part of the flocculation cylinder. The filtering device is composed of at least one group of integrated self-cutting filtering pieces. Each group of filtering pieces comprises stationary ring pieces, moving ring pieces, a stationary ring piece end plate, a moving ring piece end plate, at least two stationary ring piece positioning rods and at least two moving ring piece positioning rods.

2. The sludge flocculation and mixing apparatus integrated with self-cutting filter apparatus as claimed in claim 1, wherein: The stationary ring pieces are detachably connected with the stationary ring piece positioning rods and are arranged on the inner side of the stationary ring piece positioning rods.

3. The sludge flocculation and mixing apparatus integrated with a self-cutting filter apparatus according to claim 2, characterized in that: The stationary ring pieces are fixed on the stationary ring piece end plate through the stationary ring piece positioning rods.

4. The sludge flocculation and mixing apparatus integrated with self-cutting filter apparatus according to claim 1, wherein The stationary ring piece end plate is detachably connected with a machine frame connecting rod which is fixedly connected with the machine frame. The moving ring pieces are detachably connected with the moving ring piece positioning rods and are arranged on the outer side of the moving ring piece positioning rods. The moving ring pieces are fixed on the moving ring piece end plate through the moving ring piece positioning rods. The moving ring piece end plate is fixedly connected with a shaft sleeve of the stirring central shaft. The shaft sleeve is detachably connected with the stirring central shaft. The specific width of the stationary ring piece gap between the adjacent stationary ring pieces on the stationary ring piece positioning rods and the specific width of the moving ring piece gap between the adjacent moving ring pieces on the moving ring piece positioning rods are determined. In the axial direction of the stirring central shaft, the moving ring pieces are nested in the stationary ring pieces. The moving ring pieces, the moving ring piece positioning rods, the stationary ring pieces and the stationary ring piece positioning rods form a filtering gap. In the radial direction of the stirring central shaft, one moving ring piece is arranged between two stationary ring pieces. The cutting parts on the stationary ring pieces and the moving ring pieces are arranged on the side close to the filtering gap. The cutting parts are used for cutting the blockage in the filtering gap. The stirring central shaft is used for driving all the moving ring pieces to rotate under the driving of the driving device. The machine frame, the machine frame connecting rod and the water outlet side of the filtering device form a water collecting cylinder. The cutting parts on the stationary ring pieces and the moving ring pieces are arc-shaped, elliptical, sinusoidal, sawtooth-shaped or rectangular. The cutting parts are sawtooth-shaped. When the filtering device comprises two or more groups of integrated self-cutting filtering pieces, the groups of integrated self-cutting filtering pieces are arranged in the axial direction of the stirring central shaft. The stationary ring piece positioning rod of the first set of filter pieces is fixedly connected with the rack connecting rod through the stationary ring piece end plate at the front end of the stationary ring piece positioning rod; the stationary ring piece end plate at the front end of the next set of filter pieces is fixedly connected with the stationary ring piece end plate at the rear end of the stationary ring piece positioning rod of the previous set of filter pieces, starting from the second set; the rear end of the stationary ring piece positioning rod of the last set of filter pieces is fixedly connected with its own stationary ring piece end plate; along the axial direction of the stirring central shaft, the closer to the stirring part, the smaller the outer diameter of the stationary ring piece in the filter piece; The moving ring piece positioning rod of each set of filter pieces is fixedly connected with the shaft sleeve of the stirring central shaft through the moving ring piece end plates at the front end and the rear end of the moving ring piece positioning rod; along the axial direction of the stirring central shaft, the closer to the stirring part, the smaller the outer diameter of the moving ring piece in the filter piece; Each set of integrated self-cutting filter pieces is arranged in a stepped manner along the axial direction of the stirring central shaft.

5. The sludge flocculation and mixing apparatus integrated with self-cutting filter apparatus as claimed in claim 1 wherein: The sludge flocculation stirring device is a vertical structure.

6. The sludge flocculation and mixing apparatus integrated with a self-cutting filter apparatus according to claim 5, characterized in that: The rack is fixedly arranged on the inner side wall of the top of the flocculation cylinder; the bottom end of the stirring central shaft is fixedly connected with the stirring part through a flange; the output shaft of the driving device is rigidly coaxially connected with the stirring central shaft through a flange; the flocculation cylinder is further provided with a support frame fixed therewith; the bottom of the support frame is further provided with a plurality of supporting legs.

7. A method of operating a sludge flocculating and mixing apparatus integrated with a self-cutting filter apparatus as claimed in claim 4, wherein, The method comprises the following steps: The aqueous sludge is transported into the flocculation cylinder through the sludge inlet, and the reagent is added into the flocculation cylinder through the reagent inlet, so that the water, the sludge and the reagent enter the flocculation cylinder at the same time; Then, the driving device is started to drive the stirring central shaft to rotate, and the stirring central shaft drives the stirring part to rapidly stir and mix, so that the sludge is separated from the water to form flocculent sludge, and the water and the flocculent sludge are stratified to form a free water layer on the upper side and a sludge layer on the lower side; The water in the free water layer is driven by the rotational flow generated by the stirring central shaft to pass through the filter device, the rotation of the stirring central shaft drives the moving ring piece in the filter device to rotate relative to the stationary ring piece, the residual sludge in the free water layer is intercepted by the filter device and remains in the filter gap, while the filter device is filtering, the cutting parts on the moving ring piece and the stationary ring piece cut the pollutants in the filter gap due to the rotation of the moving ring piece relative to the stationary ring piece, and the pollutants in the filter gap return to the free water layer under the driving of the rotational flow and gradually precipitate to the sludge layer; The water in the free water layer is filtered by the filter device to form clean water, which flows into the inner cavity of the filter device and then enters the water collecting cylinder and is discharged from the water outlet; The flocculent sludge in the sludge layer is discharged from the venting port.

8. The method of claim 7, wherein: After the sludge flocculation stirring device with the integrated self-cutting filter device is used to treat the aqueous sludge, a cleaning step for the sludge flocculation stirring device is further included; the sludge outlet is used to discharge the sludge cleaned from the flocculation cylinder.

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