A solid-liquid separation device for water treatment

Abstract

The present invention relates to the field of sewage treatment, in particular to a solid-liquid separation device for water treatment, comprising a tank body, a granulation zone of the tank body provided with a flow blocking mechanism, an outer wall of the tank body provided with a servo motor, the flow blocking mechanism comprising a cover body, an annular seat and a fan blade, a first bevel gear disk rotatably installed in the cover body, a plurality of first rotating rods are installed on the side wall of the cover body, one end of the first rotating rod extends into the cover body and is provided with a first bevel gear meshing with the first bevel gear disk, a second rotating rod is installed on the side wall of the annular seat, wherein one of the second rotating rods is fixedly connected to the output shaft of the servo motor through a transmission rod passing through the tank body, one end of the fan blade is fixedly connected to the first rotating rod, and the other end of the fan blade is fixedly connected to the second rotating rod. The flow blocking mechanism can form multi-level water flow obstacles, further prolonging the residence time of sewage in the granulation zone, and the synchronous opening and closing of the fan blade driven by the servo motor can change the turbulence and mixing effect of the water flow, further enhancing the agglomeration and flocculation of small particles.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, and in particular to a solid-liquid separation device for water treatment. Background Art

[0002] In the water treatment process, the removal of colloidal and suspended pollutants can be achieved through solid-liquid separation operations. Some dissolved pollutants can also be effectively removed during the separation process. Therefore, good solid-liquid separation effect is one of the main goals of water treatment.

[0003] A Chinese invention patent with publication number CN105858735B discloses a granulation fluidized bed for solid-liquid separation, comprising a base frame on which a tank body is fixedly mounted, wherein the tank body is composed of a sludge concentration zone, a granulation zone, a separation zone and a water collection zone from bottom to top, wherein a vertical vortex enhancement separation device is installed in the separation zone, and the vertical vortex enhancement separation device can cause the water in the separation zone to generate a vertical vortex; the vertical vortex enhancement separation device comprises a centrally arranged stirring shaft sleeve, and a plurality of vertically fixed bellows are arranged around the stirring shaft sleeve, and the two ends of the bellows are sandwiched between a pair of cross frames, the centers of the cross frames are installed at the two ends of the stirring shaft sleeve, and the ends of the cross frames are fixed to the inner wall of the tank body in the separation zone.

[0004] In the above device, the vertical eddy current enhanced separation device can generate vertical eddy currents, which can promote the growth of small particles entering the device, increase the output rate of large particles, and improve the separation efficiency. However, if the residence time of small particles in the granulation area is insufficient, it may lead to insufficient agglomeration and flocculation, and small particles cannot flocculate into large particles. These small particles will directly enter the water collection area, affecting the final separation effect. Summary of the invention

[0005] The object of the present invention is to provide a solid-liquid separation device for water treatment, which ensures that small particles have enough time to agglomerate and flocculate by prolonging the residence time of sewage in a granulation zone.

[0006] In order to solve the above technical problems, the present invention provides a solid-liquid separation device for water treatment, comprising a tank body, a granulation zone is arranged in the tank body; a plurality of vertically arranged flow-blocking mechanisms are arranged in the granulation zone, a servo motor corresponding to the flow-blocking mechanism is installed on the outer wall of the tank body, the flow-blocking mechanism comprises a cover body, an annular seat and fan blades, the annular seat is fixed to the inner wall of the granulation zone, the cover body is fixed to the center of the annular seat by a plurality of groups of connecting rods, a first bevel gear disk is rotatably installed in the cover body, a plurality of groups of first rotating rods are installed on the side wall of the cover body, one end of each of the first rotating rods extends into the cover body and is provided with a first bevel gear meshing with the first bevel gear disk, a second rotating rod corresponding to the first rotating rod is installed on the side wall of the annular seat, wherein the second rotating rod is fixedly connected to the output shaft of the servo motor through a transmission rod passing through the tank body, the number of groups of the fan blades is consistent with the number of groups of the first rotating rods, one end of the fan blades is fixedly connected to the first rotating rod, and the other end of the fan blades is fixedly connected to the second rotating rod.

[0007] Preferably, the adjacent servo motors have opposite rotation directions.

[0008] Preferably, the rotation frequency of the servo motor is 30-40° / min.

[0009] Preferably, the tank body includes a base and an inner tank body, an outer tank body is installed on the base, the inner tank body is installed in the center of the outer tank body through a cross support frame, the inner cavity of the inner tank body constitutes a granulation area, a sludge scraping and sewage discharge assembly is installed in the outer tank body, a hydraulic drive mechanism is installed in the base, the output end of the hydraulic drive mechanism is fixedly connected to the input end of the sludge scraping and sewage discharge assembly, a third water supply pipe and a first water supply pipe respectively connected to the two ends of the hydraulic drive mechanism are provided on the outer wall of the base, a second water supply pipe connected to the bottom end of the inner tank body is provided on the outer wall of the outer tank body, the second water supply pipe is connected to the first water supply pipe, and when the sewage flows through the hydraulic drive mechanism, the sludge scraping and sewage discharge assembly is driven to rotate and scrape the mud.

[0010] Preferably, the hydraulic drive mechanism includes a cylinder, one end of which is provided with a water outlet connected to a first water supply pipe, the other end of the cylinder is connected to an end cover, one end of the end cover is provided with a water inlet connected to a third water supply pipe, a second bevel gear plate perpendicular to the water flow direction is rotatably installed in the cylinder, one end of the second bevel gear plate is fixedly installed with a turbine assembly facing the water inlet, a shaft cylinder is provided on one side of the cylinder, a rotating shaft is rotatably installed in the shaft cylinder, one end of the rotating shaft extends into the cylinder and is provided with a second bevel gear meshing with the second bevel gear plate, and the other end of the rotating shaft is fixedly connected to the input end of the mud scraping and sewage discharge assembly.

[0011] Preferably, the turbine assembly includes an inner sleeve and an outer sleeve fixedly mounted on one end of the thrust ball bearing, the inner sleeve is arranged at the axial center position of the outer sleeve, and the outer wall of the inner sleeve is provided with a plurality of groups of blades connected to the inner wall of the outer sleeve.

[0012] Preferably, the outer contour of the longitudinal cross-section of the inner sleeve is wing-shaped.

[0013] Preferably, the inner diameter of the outer sleeve is consistent with the inner diameter of the water inlet, and the inner diameter of the water outlet is larger than the outer diameter of the inner sleeve and smaller than the inner diameter of the water inlet.

[0014] Preferably, the end of the second bevel gear plate away from the outer sleeve is provided with a thrust ball bearing abutting the inner wall of the cylinder body, the diameter of the thrust ball bearing is consistent with the inner diameter of the cylinder body, the end of the end cover facing the cylinder body is inlaid with a radial bearing, the radial bearing is sleeved on the outside of the outer sleeve, and a shaft sleeve is abutted between the second bevel gear plate and the radial bearing, and the shaft sleeve is sleeved on the outside of the outer sleeve.

[0015] Preferably, the mud scraping and sewage discharge assembly includes a sewage discharge elbow fixed at the bottom end of the outer tank body, the vertical pipe section of the sewage discharge elbow is directly facing the sewage discharge port at the bottom of the outer tank body, and a mounting seat which is coaxial with the vertical pipe section is provided on one side of the sewage discharge elbow, a rotating rod which extends into the outer tank body along the vertical pipe section and is rotatably installed in the mounting seat, a mud scraper which adapts to the bottom contour of the outer tank body is installed at one end of the rotating rod, and the other end of the rotating rod is connected to the output end of the hydraulic drive mechanism.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are:

[0017] Multiple vertically arranged flow-blocking mechanisms can form multi-level water flow obstacles, further prolonging the residence time of sewage in the granulation area. The synchronous opening and closing of the fan blades driven by the servo motor can change the turbulence and mixing effect of the water flow, further enhancing the agglomeration and flocculation of small particles, thereby improving the solid-liquid separation effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 is a structural schematic diagram of the flow blocking mechanism;

[0021] Figure 3 Schematic diagram of the installation of the first bevel gear plate;

[0022] Figure 4 It is the structural explosion diagram of the hydraulic drive mechanism;

[0023] Figure 5 It is a schematic diagram of the internal structure of the hydraulic drive mechanism;

[0024] Figure 6 is a schematic diagram of the structure of a turbine assembly;

[0025] Figure 7 It is a schematic diagram of the structure of the sludge scraping and sewage discharge assembly.

[0026] In the figure: 1-base, 2-first water supply pipe, 3-hydraulic drive mechanism, 4-second water supply pipe, 5-servo motor, 6-outer tank, 7-stirring shaft, 8-bellows, 9-drive motor, 10-stirring paddle, 11-cross support frame, 12-inner tank, 13-blocking mechanism, 14-sludge scraping and sewage discharge assembly, 15-sewage discharge elbow, 16-third water supply pipe, 17-transmission rod, 18-annular seat, 19-fan blades, 20-connecting rod, 21-upper shell, 22-first rotating rod, 23-second rotating rod , 24-upper sleeve, 25-first bevel gear, 26-lower housing, 27-lower sleeve, 28-first bevel gear plate, 29-cylinder, 30-water outlet, 31-shaft cylinder, 32-rotating shaft, 33-pressure cover, 34-second bevel gear, 35-thrust ball bearing, 36-second bevel gear plate, 37-turbine assembly, 38-shaft sleeve, 39-radial bearing, 40-end cover, 41-water inlet, 42-outer sleeve, 43-inner sleeve, 44-blade, 45-rotating rod, 46-scraper, 47-mounting seat. DETAILED DESCRIPTION

[0027] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0028] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] like Figure 1-7 As shown, an embodiment of the present invention provides a solid-liquid separation device for water treatment, including a tank body. The tank body is composed of a base 1 and an inner tank body 12, and the top of the inner tank body 12 is open. An outer tank body 6 is installed on the base 1, and a plurality of vertically arranged cross support frames 11 firmly install the inner tank body 12 at the center of the outer tank body 6. A separation device composed of several groups of bellows 8 is installed on the top of the outer tank body 6, and the separation device constitutes the separation area of ​​the device, and the chamber between the inner top wall of the outer tank body 6 and the separation device is the water collection area. The inner cavity of the inner tank body 12 constitutes the granulation area of ​​the device, and the chamber between the outer bottom of the inner tank body 12 and the inner bottom of the outer tank body 6 is the sludge concentration area.

[0030] A stirring shaft 7 is installed in the inner tank body 12, and multiple groups of stirring paddles 10 are installed on the stirring shaft 7. One end of the stirring shaft 7 passes through the separation zone and the water collection zone and is connected to the driving motor 9 installed on the top of the outer tank body 6. Multiple vertically arranged flow blocking mechanisms 13 are arranged in the granulation zone, and these flow blocking mechanisms 13 are arranged between adjacent stirring paddles 10. The flow blocking mechanism 13 includes a cover body, an annular seat 18, a fan blade 19 and a first bevel gear disc 28. The cover body is formed by the upper shell 21 and the lower shell 26 being snap-fitted and installed. An upper sleeve 24 facing the lower shell 26 is arranged in the middle of the upper shell 21, and a lower sleeve 27 facing the upper shell 21 is arranged in the middle of the lower shell 26. The stirring shaft 7 passes through the lower sleeve 27 and the upper sleeve 24, and the inner diameter of the upper sleeve 24 is larger than the diameter of the stirring shaft 7. The end of the lower sleeve 27 shrinks toward the center to form a card table, and the first bevel gear disc 28 is sleeved on the card table and can rotate with the axis of the card table. When the upper housing 21 is buckled with the lower housing 26 , the upper sleeve 24 presses the first bevel gear plate 28 to limit its axial position.

[0031] The annular seat 18 is fixed on the inner wall of the inner tank 12 to provide stable support for the entire flow-blocking mechanism 13. The lower shell 26 is fixed to the center position of the annular seat 18 by three groups of connecting rods 20 with an angle of 120°, ensuring the stability of the lower shell 26. Multiple groups of first rotating rods 22 are installed on the side wall of the lower shell 26. One end of each first rotating rod 22 extends into the lower shell 26 and is fixed with a first bevel gear 25 meshing with the first bevel gear plate 28. Second rotating rods 23 corresponding to the first rotating rods 22 are installed on the side wall of the annular seat 18. The number of groups of blades 19 is consistent with the number of groups of first rotating rods 22. One end of the blade 19 is fixedly connected to the first rotating rod 22, and the other end of the blade 19 is fixedly connected to the second rotating rod 23 to form an integrated blade rotation system.

[0032] The outer wall of the outer tank body 6 is equipped with a servo motor 5 corresponding to the flow blocking mechanism 13, wherein a second rotating rod 23 is fixedly connected to the output shaft of the servo motor 5 through a transmission rod 17 passing through the inner tank body 12 and the outer tank body 6 (a mechanical seal is provided at the connection between the transmission rod 17 and the inner tank body 12 and the outer tank body 6 to prevent sewage leakage). Among them, the directions of the adjacent servo motors 5 are opposite, and the rotation frequency of the servo motor 5 is 30-40° / min. When the servo motor 5 is started, it drives the second rotating rod 23 connected thereto to rotate through the transmission rod 17. Since the two ends of the fan blade 19 are fixedly connected to the first rotating rod 22 and the second rotating rod 23 respectively, the rotation of the second rotating rod 23 will drive the fan blade 19 and the first rotating rod 22 thereon to rotate together, and the rotation of the first rotating rod 22 drives the first bevel gear disk 28 to rotate through the first bevel gear 25, thereby realizing the synchronous rotation of all the fan blades 19.

[0033] In the initial state, when the angle between the blades 19 and the horizontal plane is 0°, they actually play the role of closing the channel between the annular seat 18 and the lower shell 26. However, as the servo motor 5 continues to rotate, the inclination angle of the blades 19 will change and no longer remain parallel to the horizontal plane. This change causes the space between the annular seat 18 and the lower shell 26 to be reconfigured, forming a number of dynamic, adjustable channels or openings, thereby realizing the dynamic screening and separation of small particles in the sewage and extending the residence time of small particles.

[0034] A mud scraping and sewage discharge assembly 14 is installed in the outer tank body 6, a hydraulic drive mechanism 3 is installed in the base 1, and the output end of the hydraulic drive mechanism 3 is fixedly connected to the input end of the mud scraping and sewage discharge assembly 14. A third water supply pipe 16 and a first water supply pipe 2 are respectively connected to the two ends of the hydraulic drive mechanism 3 on the outer wall of the base 1, and a second water supply pipe 4 connected to the bottom end of the inner tank body 12 is provided on the outer wall of the outer tank body 6, and the second water supply pipe 4 is connected to the first water supply pipe 2.

[0035] The hydraulic drive mechanism 3 includes a cylinder 29, a thrust ball bearing 35, a second bevel gear disc 36, a turbine assembly 37, a sleeve 38 and a radial bearing 39. A water outlet 30 connected to the first water supply pipe 2 is provided at one end of the cylinder 29, an end cover 40 is connected to the other end of the cylinder 29, and a water inlet 41 connected to the third water supply pipe 16 is provided at one end of the end cover 40. The turbine assembly 37 is directly opposite to the water inlet 41, and includes an inner sleeve 43 and an outer sleeve 42. The inner sleeve 43 is arranged at the axial center position of the outer sleeve 42, and the outer wall of the inner sleeve 43 is provided with a plurality of groups of blades 44 connected to the inner wall of the outer sleeve 42. The outer contour of the longitudinal section of the inner sleeve 43 is wing-shaped, so that the water flow is accelerated through the blade area. The inner diameter of the outer sleeve 42 is consistent with the inner diameter of the water inlet 41, and the inner diameter of the water outlet 30 is larger than the outer diameter of the inner sleeve 43 and smaller than the inner diameter of the water inlet 41.

[0036] The second bevel gear disc 36 is perpendicular to the direction of water flow. The thrust ball bearing 35 is sleeved on one end of the second bevel gear disc 36 and abuts against the inner wall of the cylinder 29. The diameter of the thrust ball bearing 35 is consistent with the inner diameter of the cylinder 29, ensuring that the second bevel gear disc 36 rotates stably in the axial direction and preventing it from being offset due to axial force. The other end of the second bevel gear disc 36 is fixedly installed with the outer sleeve 42. The end of the end cover 40 facing the cylinder 29 is inlaid with a radial bearing 39, and the radial bearing 39 is sleeved on the outside of the outer sleeve 42. The radial bearing 39 provides radial support for the second bevel gear disc 36 and the outer sleeve 42 to ensure that they will not shake due to radial force during rotation. A shaft sleeve 38 is abutted between the second bevel gear disc 36 and the radial bearing 39, and the shaft sleeve 38 is sleeved on the outside of the outer sleeve 42 to provide axial limitation for the second bevel gear disc 36. A shaft cylinder 31 is provided on one side of the cylinder 29, and a rotating shaft 32 is rotatably mounted in the shaft cylinder 31, and the rotating shaft 32 is limited in axial movement by a pressure cover 33. One end of the rotating shaft 32 extends into the cylinder 29 and is provided with a second bevel gear 34 meshing with a second bevel gear disc 36.

[0037] The sludge scraping and sewage discharge assembly 14 includes a sewage discharge elbow 15 fixed at the bottom end of the outer tank body 6, the vertical pipe section of the sewage discharge elbow 15 is directly facing the sewage discharge port at the bottom of the outer tank body 6, and the horizontal pipe section of the sewage discharge elbow 15 extends to the outside of the base 1. A mounting seat 47 coaxial with the vertical pipe section is provided on one side of the sewage discharge elbow 15, and a rotating rod 45 extending into the outer tank body 6 along the vertical pipe section is rotatably installed in the mounting seat 47. A scraper blade 46 adapted to the bottom contour of the outer tank body 6 is installed at one end of the rotating rod 45, and the other end of the rotating rod 45 is fixedly connected to the rotating shaft 32 through an electromagnetic clutch.

[0038] The horizontal pipe section of the sewage elbow 15 is equipped with a normally closed valve. The pressurized raw water with coagulant and coagulant aid enters the inner tank 12 through the third water supply pipe 16, the hydraulic drive mechanism 3, the first water supply pipe 2, and the second water supply pipe 4. The drive motor 9 is started, and the electromagnetic clutch disconnects the connection between the rotating rod 45 and the rotating shaft 32. In the granulation area, the raw water is continuously stirred by the coagulant, coagulant aid and the stirring paddle 10. The small particles in the sewage rise with the water flow and gradually flocculate and grow. When the servo motor 5 is started, the inclination angle of the fan blade 19 will change and no longer remain parallel to the horizontal plane. This change causes the space between the annular seat 18 and the lower shell 26 to be reconfigured, forming a number of dynamic and adjustable channels or openings, thereby realizing the dynamic screening and separation of small particles in the sewage, extending the residence time of small particles, and providing sufficient time for flocculation. The flocculated large particles flip down from the top of the inner tank 12 under the action of the rising water flow. Due to the obstruction of the bellows 8, the large particles enter the sludge concentration area under the action of gravity until they settle to the bottom of the outer tank 6 to form sludge. The remaining small particles that flow out of the inner tank 12 enter the bellows 8. At a certain rising flow rate, the water flow forms a vortex at the corrugation of the bellows 8. The small particles gradually grow in the vortex through contact flocculation. The grown particles automatically fall into the sludge concentration area under the action of gravity. After the particles in the bellows 8 fall, new particles are formed again, and the cycle continues. The clean water finally formed is discharged from the water collection area through the outlet pipe set at the top of the outer tank 6.

[0039] After the device has been running for a period of time (generally 1 to 1.5 hours), the valve is opened, the sludge in the sludge concentration area is discharged, and the electromagnetic clutch reconnects the rotating rod 45 with the rotating shaft 32. Since the inner diameter of the water inlet 41 is larger than the inner diameter of the water outlet 30, the flow rate of the water flowing through the turbine assembly 37 increases. When the water flow hits the turbine assembly 37, it will drive it to rotate. The turbine assembly 37 is fixedly connected to the second bevel gear disc 36, so the rotation of the turbine assembly 37 will drive the second bevel gear disc 36 to rotate together, and then drive the second bevel gear 34 to rotate, and finally drive the scraper 46 to rotate and scrape the sludge, accelerating the discharge of sludge and avoiding sludge accumulation. When the sludge discharged from the sewage elbow 15 turns into relatively clear water, the valve is closed again, and the electromagnetic clutch disconnects the connection between the rotating rod 45 and the rotating shaft 32, waiting for the next cycle.

[0040] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solid-liquid separation device for water treatment, comprising a tank body, wherein a granulation zone is arranged in the tank body; characterized in that: A plurality of vertically arranged flow-blocking mechanisms (13) are arranged in the granulation zone. A servo motor (5) corresponding to the flow-blocking mechanisms (13) is installed on the outer wall of the tank body. The flow-blocking mechanism (13) comprises a cover body, an annular seat (18) and a fan blade (19). The annular seat (18) is fixed to the inner wall of the granulation zone. The cover body is fixed to the center of the annular seat (18) through a plurality of groups of connecting rods (20). A first bevel gear plate (28) is rotatably installed in the cover body. A plurality of groups of first rotating rods (22) are installed on the side wall of the cover body. One end of each of the first rotating rods (22) extends A first bevel gear (25) meshing with the first bevel gear plate (28) is disposed in the housing, and a second rotating rod (23) corresponding to the first rotating rod (22) is mounted on the side wall of the annular seat (18), wherein the second rotating rod (23) is fixedly connected to the output shaft of the servo motor (5) via a transmission rod (17) passing through the tank body, the number of groups of the fan blades (19) is consistent with the number of groups of the first rotating rod (22), one end of the fan blade (19) is fixedly connected to the first rotating rod (22), and the other end of the fan blade (19) is fixedly connected to the second rotating rod (23).

2. The solid-liquid separation device for water treatment according to claim 1, characterized in that: The rotation directions of adjacent servo motors (5) are opposite.

3. The solid-liquid separation device for water treatment according to claim 2, characterized in that: The rotation frequency of the servo motor (5) is 30-40° / min.

4. The solid-liquid separation device for water treatment according to claim 1, characterized in that: The tank body comprises a base (1) and an inner tank body (12); an outer tank body (6) is mounted on the base (1); the inner tank body (12) is mounted at the center of the outer tank body (6) via a cross support frame (11); the inner cavity of the inner tank body (12) constitutes a granulation zone; a sludge scraping and sewage discharge assembly (14) is mounted in the outer tank body (6); a hydraulic drive mechanism (3) is mounted in the base (1); the output end of the hydraulic drive mechanism (3) is fixedly connected to the input end of the sludge scraping and sewage discharge assembly (14); a third water supply pipe (16) and a first water supply pipe (2) are respectively connected to the two ends of the hydraulic drive mechanism (3); a second water supply pipe (4) connected to the bottom end of the inner tank body (12) is arranged on the outer wall of the outer tank body (6); the second water supply pipe (4) is connected to the first water supply pipe (2); when sewage flows through the hydraulic drive mechanism (3), the sludge scraping and sewage discharge assembly (14) is driven to rotate and scrape the sludge.

5. The solid-liquid separation device for water treatment according to claim 4, characterized in that: The hydraulic drive mechanism (3) comprises a cylinder (29), one end of which is provided with a water outlet (30) connected to a first water supply pipe (2), the other end of which is connected to an end cover (40), one end of which is provided with a water inlet (41) connected to a third water supply pipe (16), a second bevel gear disc (36) rotatably mounted in the cylinder (29) and perpendicular to the direction of water flow, one end of which is fixedly mounted with a turbine assembly (37) facing the water inlet (41), a shaft cylinder (31) being provided on one side of the cylinder (29), a rotating shaft (32) being rotatably mounted in the shaft cylinder (31), one end of which extends into the cylinder (29) and is provided with a second bevel gear (34) meshing with the second bevel gear disc (36), and the other end of which is fixedly connected to an input end of a sludge scraping and sewage discharge assembly (14).

6. The solid-liquid separation device for water treatment according to claim 5, characterized in that: The turbine assembly (37) comprises an inner sleeve (43) and an outer sleeve (42) fixedly mounted on one end of a thrust ball bearing (35); the inner sleeve (43) is arranged at the axial center of the outer sleeve (42); and the outer wall of the inner sleeve (43) is provided with a plurality of groups of blades (44) connected to the inner wall of the outer sleeve (42).

7. The solid-liquid separation device for water treatment according to claim 6, characterized in that: The outer contour of the longitudinal cross section of the inner sleeve (43) is wing-shaped.

8. The solid-liquid separation device for water treatment according to claim 7, characterized in that: The inner diameter of the outer sleeve (42) is consistent with the inner diameter of the water inlet (41), and the inner diameter of the water outlet (30) is larger than the outer diameter of the inner sleeve (43) and smaller than the inner diameter of the water inlet (41).

9. The solid-liquid separation device for water treatment according to claim 6, characterized in that: The end of the second bevel gear plate (36) away from the outer sleeve (42) is covered with a thrust ball bearing (35) that abuts against the inner wall of the cylinder (29); the diameter of the thrust ball bearing (35) is consistent with the inner diameter of the cylinder (29); the end of the end cover (40) facing the cylinder (29) is inlaid with a radial bearing (39); the radial bearing (39) is sleeved on the outside of the outer sleeve (42); a shaft sleeve (38) abuts between the second bevel gear plate (36) and the radial bearing (39); the shaft sleeve (38) is sleeved on the outside of the outer sleeve (42).

10. The solid-liquid separation device for water treatment according to claim 4, characterized in that: The mud scraping and sewage discharge assembly (14) comprises a sewage discharge elbow (15) fixed at the bottom end of the outer tank body (6), the vertical pipe section of the sewage discharge elbow (15) facing the sewage discharge port at the bottom of the outer tank body (6), a mounting seat (47) coaxial with the vertical pipe section is provided on one side of the sewage discharge elbow (15), a rotating rod (45) extending into the outer tank body (6) along the vertical pipe section is rotatably mounted in the mounting seat (47), a mud scraping plate (46) adapted to the bottom contour of the outer tank body (6) is mounted at one end of the rotating rod (45), and the other end of the rotating rod (45) is connected to the output end of the hydraulic drive mechanism (3).

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