CN111533388A

CN111533388A - Sewage treatment system

Info

Publication number: CN111533388A
Application number: CN202010431161.1A
Authority: CN
Inventors: 钟灵; 胡遵琪; 赵晓东
Original assignee: Anhui Qinglan Environmental Protection Engineering Co ltd
Current assignee: Anhui Qinglan Environmental Protection Engineering Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-08-14

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment system which comprises a solid-liquid separation device, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, a disinfection tank and a water outlet well; the solid-liquid separation device comprises a sewage pool, a material stirring and conveying mechanism, a solid garbage recycling mechanism and a floccule recycling mechanism; the sewage treatment system provided by the invention can intercept solid garbage with various volumes at one time, continuously and efficiently in the early stage, a plurality of groups of grids are not needed, the equipment cost and the occupied space are reduced, in addition, the large-volume garbage is easier to separate from the intercepting device, the subsequent collection of the solid garbage is convenient, and the garbage accumulation is avoided to prevent the equipment from running.

Description

Sewage treatment system

Technical Field

The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment system.

Background

In the sewage treatment process, a grid is generally adopted for solid-liquid separation, however, the types of solid garbage in sewage are complicated, such as general solid garbage with a certain volume and floccule garbage with a smaller volume and suspended in water, and the two types of solid garbage need to use two types of grids with different thicknesses during separation, because the meshes of the coarse grid are larger and cannot intercept fine floccules, and the surfaces of the fine grids are smooth and are not easy to attach large-volume solid garbage, two sets of grid equipment are needed in order to fully separate the solid garbage from the sewage in the prior art, so that the occupied space is large, and the equipment cost is high; in addition, the grapple on the grating in the prior art is generally of a fixed structure, so that garbage is not easy to fall off after being attached, is easy to accumulate on the grating, and even blocks the grating and hinders the grating to operate in severe cases.

Disclosure of Invention

The invention aims to provide a sewage treatment system which can efficiently and reliably intercept and recover solid garbage in sewage in the early stage of sewage treatment.

The technical scheme adopted by the invention is as follows:

a sewage treatment system comprises a solid-liquid separation device, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, a disinfection tank and a water outlet well; the solid-liquid separation device comprises a sewage pool, a material stirring and conveying mechanism, a solid garbage recycling mechanism and a floccule recycling mechanism; the sewage pool is provided with a water inlet and a water outlet; the material stirring and conveying mechanism comprises a material stirring roller, a conveying mesh belt and a guide roller; the material stirring roller and the guide roller are arranged on the frame in a parallel rotating mode, the conveying mesh belt is tensioned between the material stirring roller and the guide roller, a movable hook claw is arranged on the material stirring roller, the movable hook claw is arranged on the roller surface of the material stirring roller in a telescopic mode, and the movable hook claw is assembled to move between the following two stations: the material poking device comprises a first station and a second station, wherein a movable hook claw protrudes out of the outer side of the roll surface of the material poking roll, and the movable hook claw contracts into the inner side of the roll surface of the material poking roll; when the movable hook claw is switched from the station to the station I, the movable hook claw can pierce through meshes of the conveying mesh belt and protrudes to the outer side of the belt surface of the conveying mesh belt; the stirring roller is positioned in the sewage tank, and the discharge end of the conveying net belt extends out of the sewage tank; the solid garbage recycling mechanism is positioned at the material outlet end of the conveying net and used for collecting solid garbage; the floccule recycling mechanism is positioned on a conveying path of a conveying mesh belt at the downstream of the solid garbage recycling mechanism and is used for collecting small-particle garbage and floccule; the water outlet of the sewage tank is communicated with the anaerobic tank, the anoxic tank and the aerobic tank are sequentially communicated, the aerobic tank is communicated with the sedimentation tank, the sedimentation tank is communicated with the disinfection tank, the disinfection tank is communicated with the water outlet well, and an aeration pipeline is arranged in the aerobic tank; also comprises a dosing device used for dosing the aerobic tank.

The material shifting and conveying mechanism further comprises a telescopic driving mechanism, the telescopic driving mechanism is assembled to be capable of driving the movable hook claw to be switched to the first station from the second station after the movable hook claw is rotated into the wrap angle range of the material shifting roller and the conveying mesh belt, and capable of driving the movable hook claw to be switched to the second station from the first station before the movable hook claw is rotated out of the wrap angle range of the material shifting roller and the conveying mesh belt.

The material shifting roller comprises a rotating shaft, a spoke frame arranged in a protruding manner along the radial direction is arranged on the rotating shaft, an arc-shaped plate is arranged at the outer end of the spoke frame, the arc center of the arc-shaped plate is overlapped with the axis of the rotating shaft, the movable hook claw is arc-shaped, the movable hook claw is connected with the arc-shaped plate in a relative rotation manner by taking the arc center as the rotating shaft, and an arc-shaped through hole for the movable hook claw to penetrate through is formed in the arc-shaped plate.

The telescopic driving mechanism comprises a first swing rod, a second swing rod, a first connecting rod and a second connecting rod, one end of the first swing rod and one end of the second swing rod are hinged with the spoke frame, the other end of the first swing rod is hinged with one end of the first connecting rod, a connecting plate which extends along the radial direction of a clamping jaw is arranged on the clamping jaw, the other end of the first connecting rod is hinged with a first pivot arranged on the connecting plate, a rod body of the first connecting rod is hinged with one end of the second swing rod, one end of the second connecting rod is hinged with a rod body of the second swing rod, the other end of the second swing rod is hinged with a second pivot arranged on the connecting plate, the first swing rod is parallel to the second swing rod, and the first connecting rod is parallel to; the connecting line of the axes of the first pivot and the second pivot is parallel to the first swing rod and the second swing rod, and the arc center of the claw is positioned on the extension line of the connecting line of the axes of the first pivot and the second pivot; the telescopic driving mechanism further comprises a driving member for driving the first swing rod or the second swing rod to swing.

The driving component comprises a deflector rod coaxially and fixedly connected with the first oscillating rod or the second oscillating rod, the end part of the deflector rod is provided with a roller, a groove-shaped rail is arranged beside the spoke frame, and the roller is positioned in the groove-shaped rail and forms rolling fit with the groove-shaped rail; the groove-shaped track comprises a first section and a second section, the first section and the second section are both arc-shaped, arc centers of the first section and the second section are located on an axis of the rotating shaft, the curvature radius of the first section is smaller than that of the second section, the second section is located in a covering range of a wrap angle of the material stirring roller and the conveying net belt, the first section and the second section are in smooth transition, and the groove-shaped track is fixedly connected with the rack.

A plurality of the spoke frames and the arc-shaped plates are uniformly arranged at intervals along the circumferential direction of the rotating shaft; a plurality of movable hook claws are uniformly arranged at intervals along the length direction of the arc-shaped plate, and all the movable hook claws on the same arc-shaped plate share the same first pivot and the same second pivot; the arc-shaped plate is provided with a groove for containing the connecting plate and an arc-shaped groove for containing the first pivot and the second pivot, and the arc center of the arc-shaped groove is superposed with the arc center of the movable hook claw.

The conveying direction of the cutting end of the conveying mesh belt on the material poking roller is horizontally or obliquely arranged downwards.

The part of the conveying mesh belt extending out of the sewage pool is provided with an upper layer of belt surface and a lower layer of belt surface, wherein the solid garbage recycling mechanism is arranged at a turning-back position between the upper layer of belt surface and the lower layer of belt surface, and the solid garbage recycling mechanism comprises a material collecting hopper.

The floccule recycling mechanism comprises a cleaning box, the lower layer of belt surface of the conveying net belt penetrates through the cleaning box, roller brushes are arranged in the cleaning box, the roller brushes are arranged in pairs and are respectively arranged on two sides of the lower layer of belt surface, an air outlet is arranged below the cleaning box, and the air outlet is connected with the suction type filter.

The cleaning box is characterized in that a drying device is further arranged at the upper stream of the cleaning box and comprises a box body, a lower layer belt surface penetrates through the box body, an electric heating device is arranged in the box body, and an exhaust port is formed in the box body.

The invention has the technical effects that: the sewage treatment system provided by the invention can intercept solid garbage with various volumes at one time, continuously and efficiently in the early stage, a plurality of groups of grids are not needed, the equipment cost and the occupied space are reduced, in addition, the large-volume garbage is easier to separate from the intercepting device, the subsequent collection of the solid garbage is convenient, and the garbage accumulation is avoided to prevent the equipment from running.

Drawings

FIG. 1 is a perspective view of a solid-liquid separation apparatus provided in an embodiment of the present invention;

FIG. 2 is a perspective view of another perspective of a solid-liquid separation device provided in an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a solid-liquid separation device provided in an embodiment of the present invention;

FIG. 4 is a perspective view of an inverted delivery mechanism provided by an embodiment of the present invention;

FIG. 5 is a perspective view of a kickoff roller provided by embodiments of the present invention;

FIG. 6 is a perspective view of a track provided by an embodiment of the present invention;

fig. 7 is a perspective view of a driving structure of a first movable claw station provided in the embodiment of the present invention;

FIG. 8 is a front view of a driving structure of a first movable claw station provided by the embodiment of the invention;

fig. 9 is a perspective view of a driving structure of a second movable claw station provided in the embodiment of the present invention;

fig. 10 is a front view of a driving structure of a second movable claw station provided in the embodiment of the present invention;

FIG. 11 is a schematic diagram of a wastewater treatment system provided by an embodiment of the present invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.

Example 1

As shown in fig. 11, a sewage treatment system comprises a solid-liquid separation device 1, an anaerobic tank 2, an anoxic tank 3, an aerobic tank 4, a sedimentation tank 5, a disinfection tank 6 and a water outlet well 7; as shown in fig. 1, 2 and 3, the solid-liquid separation device 1 comprises a sewage tank 20, a material-stirring conveying mechanism 10, a solid waste recovery mechanism 30 and a floccule recovery mechanism 40; the sewage tank 20 is provided with a water inlet 21 and a water outlet 22; as shown in fig. 4, the material stirring and conveying mechanism 10 includes a material stirring roller 11, a conveying mesh belt 12 and a guide roller 13; dial material roller 11 and guide roll 13 parallel rotation and set up in the frame, conveying mesh belt 12 tensioning is between dial material roller 11 and guide roll 13, dial and be equipped with movable claw 111 on the material roller 11, movable claw 111 is colluded in the flexible roll surface department that sets up in dial material roller 11, and movable claw 111 is colluded in the assembly and is moved between following two stations: in the first station, the movable hook claw 111 protrudes out of the roll surface of the material poking roll 11, and in the second station, the movable hook claw 111 contracts into the roll surface of the material poking roll 11; when the movable hook claw 111 is switched from the station two to the station one, the mesh of the conveying mesh belt 12 can be pierced and protruded outside the belt surface of the conveying mesh belt 12; the material poking and conveying mechanism 10 provided by the invention has the advantages that the movable hook claw 111 extends out of the roller surface in the material poking state, so that large-volume materials can be reliably attached to the conveying mesh belt 12 on the surface of the material poking roller 11, and when the materials are about to reach the horizontal conveying belt at the top end of the material poking roller 11, the movable hook claw 111 can be contracted in the roller surface, so that the large-volume materials can be separated from the claw to avoid winding on one hand, and the conveying mesh belt 12 is conveniently separated from the material poking roller 11 on the other hand; in addition, the telescopic movable hook claw 111 is arranged to pick up large-volume materials, so that meshes of the conveying net belt 12 can be set to be small enough to intercept small-volume materials such as floccules and the like, and one-time interception of materials with different volumes is realized; the stirring roller 11 is positioned in the sewage tank 20, and the discharge end of the conveying mesh belt 12 extends out of the sewage tank 20; the solid garbage recycling mechanism 30 is positioned at the discharge end of the conveying mesh belt 12 and is used for collecting solid garbage; the floccule recycling mechanism 40 is positioned on the conveying path of the conveying mesh belt 12 at the downstream of the solid waste recycling mechanism 30, and the floccule recycling mechanism 40 is used for collecting small-particle waste and floccule; the invention can separate the large-volume garbage and the flocculent garbage from the sewage at the same time, and can collect the large-volume garbage and the flocculent garbage respectively, thereby realizing the quick salvage, classification and recovery of the solid garbage; the water outlet 22 of the sewage tank 20 is communicated with the anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 are sequentially communicated, the aerobic tank 4 is communicated with the sedimentation tank 5, the sedimentation tank 5 is communicated with the disinfection tank 6, the disinfection tank 6 is communicated with the water outlet well 7, and an aeration pipeline 8 is arranged in the aerobic tank 4; and a drug adding device 9 for adding drug to the aerobic tank 4. The sewage treatment system provided by the invention can intercept solid garbage with various volumes at one time, continuously and efficiently in the early stage, a plurality of groups of grids are not needed, the equipment cost and the occupied space are reduced, in addition, the large-volume garbage is easier to separate from the intercepting device, the subsequent collection of the solid garbage is convenient, and the garbage accumulation is avoided to prevent the equipment from running.

Further, as shown in fig. 5, 7, 8, 9, and 10, the material-shifting conveying mechanism 10 further includes a telescopic driving mechanism 114, and the telescopic driving mechanism 114 is configured to drive the movable hook 111 to switch from the station two to the station one after the movable hook 111 rotates into the wrap angle range between the material-shifting roller 11 and the conveying mesh belt 12, and drive the movable hook 111 to switch from the station one to the station two before the movable hook 111 rotates out of the wrap angle range between the material-shifting roller 11 and the conveying mesh belt 12.

Specifically, as shown in fig. 5, 8, and 10, the material stirring roller 11 includes a rotating shaft 112, a radial frame 113 protruding along a radial direction is disposed on the rotating shaft 112, an arc plate 115 is disposed at an outer end of the radial frame 113, an arc center of the arc plate 115 coincides with an axis of the rotating shaft 112, the movable hook 111 is arc-shaped, the movable hook 111 rotates relative to the arc plate 115 with its own arc center as the rotating shaft 112, and an arc through hole for the movable hook 111 to pass through is disposed on the arc plate 115. The movable hook claw 111 is set to be arc-shaped and beneficial to hooking materials, the movable hook claw 111 rotates along the arc center of the movable hook claw, the arc-shaped movable hook claw 111 can be ensured to be located at the same position with the intersection point of the arc plate 115 in the stretching process all the time, the arc hole is convenient to open on the one hand, only normal motion can be caused between the movable hook claw 111 and the conveying mesh belt 12 on the other hand, and the stretching process of the movable hook claw 111 is prevented from dragging the conveying mesh belt 12.

Specifically, as shown in fig. 7, 8, 9 and 10, the telescopic driving mechanism 114 includes a first swing link 1141, a second swing link 1142, a first link 1143 and a second link 1144, one end of the first swing link 1141 and one end of the second swing link 1142 are hinged to the spider 113, the other end of the first swing link 1141 is hinged to one end of the first link 1143, the jaw is provided with a connecting plate 1111 extending along the radial direction of the jaw, the other end of the first link 1143 is hinged to a first pivot 1146 arranged on the connecting plate 1111, a shaft of the first link 1143 is hinged to one end of the second swing link 1142, one end of the second link 1144 is hinged to a shaft of the second swing link 1142, the other end of the second swing link 1142 is hinged to a second pivot 1145 arranged on the connecting plate 1111, the first swing link 1141 is parallel to the second swing link 1142, and the first link 1143 is parallel to the second link 1144; the axis connecting line of the first pivot 1146 and the second pivot 1145 is parallel to the first swing rod 1141 and the second swing rod 1142, and the arc center of the claw is located on the extension line of the axis connecting line of the first pivot 1146 and the second pivot 1145; the telescopic driving mechanism 114 further includes a driving member for driving the first swing link 1141 or the second swing link 1142 to swing. The driving component comprises a driving lever 1147 coaxially and fixedly connected with the first swing rod 1141 or the second swing rod 1142, the end part of the driving lever 1147 is provided with a roller 1148, the side of the spoke frame 113 is provided with a groove-shaped rail 116, and the roller 1148 is positioned in the groove-shaped rail 116 and forms rolling fit with the groove-shaped rail 116; as shown in fig. 6, the groove-shaped track 116 includes a first segment 1161 and a second segment 1162, the first segment 1161 and the second segment 1162 are both arc-shaped, and an arc center is located on an axis of the rotating shaft 112, wherein a curvature radius of the first segment 1161 is smaller than a curvature radius of the second segment 1162, the second segment 1162 is located in a wrap angle coverage range of the material poking roller 11 and the conveying mesh belt 12, the first segment 1161 and the second segment 1162 are in smooth transition, and the groove-shaped track 116 is fixedly connected to the frame. The transmission principle of the telescopic driving mechanism 114 is as follows: referring to fig. 7, 8, 9 and 10, when the movable hook 111 is located at a station, as shown in fig. 7 and 8, the first oscillating bar 1141, the second oscillating bar 1142, the first connecting bar 1143 and the spoke 113 form a set of parallel four-bar linkage mechanism, and the first connecting bar 1143, the second connecting bar 1144, the second oscillating bar 1142 and the connecting plate 1111 form another set of parallel four-bar linkage mechanism, in which the oscillating posture of the connecting plate 1111 is always consistent with that of the first oscillating bar 1141 and the second oscillating bar 1142, and the arc center of the movable hook 111 is located on the connecting line between the hinge axis centers of the first oscillating bar 1141 and the second oscillating bar 1142 and the spoke 113, so that the oscillating of the first oscillating bar 1141 and the second oscillating bar 1142 can drive the movable hook 111 to rotate around its own arc center.

Preferably, as shown in fig. 5, a plurality of the spokes 113 and the arc plates 115 are uniformly arranged along the circumferential direction of the rotating shaft 112 at intervals; a plurality of movable hook claws 111 are uniformly arranged at intervals along the length direction of the arc-shaped plate 115, and all the movable hook claws 111 on the same arc-shaped plate 115 share the same first pivot 1146 and second pivot 1145; the arc plate 115 is provided with a groove for accommodating the connecting plate 1111 and an arc groove for accommodating the first pivot 1146 and the second pivot 1145, and the arc center of the arc groove coincides with the arc center of the movable hook claw 111.

Preferably, the conveying mesh belt 12 is arranged horizontally or obliquely downwards in the conveying direction of the cutting end of the material poking roller 11, so that the solid garbage is prevented from falling back.

Specifically, as shown in fig. 3, the portion of the mesh conveyor belt 12 extending out of the wastewater tank 20 has upper and lower belt surfaces, wherein the solid waste recycling mechanism 30 is disposed at the turn-back position between the upper belt surface and the lower belt surface, and the solid waste recycling mechanism 30 includes a collecting hopper. The floccule recycling mechanism 40 comprises a cleaning box 41, the lower layer of the conveying net belt 12 penetrates through the cleaning box 41, roller brushes 411 are arranged in the cleaning box 41, the roller brushes 411 are arranged in pairs and are respectively arranged on two sides of the lower layer of the belt, an air outlet is arranged below the cleaning box 41, and the air outlet is connected with a suction type filter. The upper stream of the cleaning box 41 is also provided with a drying device, the drying device comprises a box body 42, the lower layer belt surface penetrates through the box body 42, an electric heating device 421 is arranged in the box body 42, and an exhaust port is arranged on the box body 42. The invention dries the floccule first, then uses the roller brush 411 to clear the floccule from the conveying mesh belt 12, and then uses the suction type filter to realize the final recovery of the floccule.

Example 2

A solid-liquid separation method for sewage comprises the following steps:

step 1: discharging the mixed sewage with the solid garbage and the floccules into a sewage tank 20;

step 2: filtering the mixed sewage by using the material stirring conveying mechanism 10, separating solid garbage and floccules from the mixed sewage by using the material stirring conveying mechanism 10, and feeding the filtered sewage into a downstream reaction tank;

and step 3: the kick-out conveying mechanism 10 conveys the solid garbage to the solid garbage recycling mechanism 30, and the floccules are adsorbed on the conveying mesh belt 12 of the kick-out conveying mechanism 10 to be conveyed continuously;

and 4, step 4: the floc enters a floc recovery mechanism 40 along with the mesh belt 12, and the floc recovery mechanism 40 cleans the mesh belt 12 and recovers the floc adsorbed thereon.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. A sewage treatment system is characterized in that: comprises a solid-liquid separation device, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, a disinfection tank and a water outlet well; the solid-liquid separation device comprises a sewage pool, a material stirring and conveying mechanism, a solid garbage recycling mechanism and a floccule recycling mechanism; the sewage pool is provided with a water inlet and a water outlet; the material stirring and conveying mechanism comprises a material stirring roller, a conveying mesh belt and a guide roller; the material stirring roller and the guide roller are arranged on the frame in a parallel rotating mode, the conveying mesh belt is tensioned between the material stirring roller and the guide roller, a movable hook claw is arranged on the material stirring roller, the movable hook claw is arranged on the roller surface of the material stirring roller in a telescopic mode, and the movable hook claw is assembled to move between the following two stations: the material poking device comprises a first station and a second station, wherein a movable hook claw protrudes out of the outer side of the roll surface of the material poking roll, and the movable hook claw contracts into the inner side of the roll surface of the material poking roll; when the movable hook claw is switched from the station to the station I, the movable hook claw can pierce through meshes of the conveying mesh belt and protrudes to the outer side of the belt surface of the conveying mesh belt; the stirring roller is positioned in the sewage tank, and the discharge end of the conveying net belt extends out of the sewage tank; the solid garbage recycling mechanism is positioned at the material outlet end of the conveying net and used for collecting solid garbage; the floccule recycling mechanism is positioned on a conveying path of a conveying mesh belt at the downstream of the solid garbage recycling mechanism and is used for collecting small-particle garbage and floccule; the water outlet of the sewage tank is communicated with the anaerobic tank, the anoxic tank and the aerobic tank are sequentially communicated, the aerobic tank is communicated with the sedimentation tank, the sedimentation tank is communicated with the disinfection tank, the disinfection tank is communicated with the water outlet well, and an aeration pipeline is arranged in the aerobic tank; also comprises a dosing device used for dosing the aerobic tank.

2. The wastewater treatment system according to claim 1, wherein: the material shifting and conveying mechanism further comprises a telescopic driving mechanism, the telescopic driving mechanism is assembled to be capable of driving the movable hook claw to be switched to the first station from the second station after the movable hook claw is rotated into the wrap angle range of the material shifting roller and the conveying mesh belt, and capable of driving the movable hook claw to be switched to the second station from the first station before the movable hook claw is rotated out of the wrap angle range of the material shifting roller and the conveying mesh belt.

3. The wastewater treatment system according to claim 2, wherein: the material shifting roller comprises a rotating shaft, a spoke frame arranged in a protruding manner along the radial direction is arranged on the rotating shaft, an arc-shaped plate is arranged at the outer end of the spoke frame, the arc center of the arc-shaped plate is overlapped with the axis of the rotating shaft, the movable hook claw is arc-shaped, the movable hook claw is connected with the arc-shaped plate in a relative rotation manner by taking the arc center as the rotating shaft, and an arc-shaped through hole for the movable hook claw to penetrate through is formed in the arc-shaped plate.

4. The wastewater treatment system according to claim 3, wherein: the telescopic driving mechanism comprises a first swing rod, a second swing rod, a first connecting rod and a second connecting rod, one end of the first swing rod and one end of the second swing rod are hinged with the spoke frame, the other end of the first swing rod is hinged with one end of the first connecting rod, a connecting plate which extends along the radial direction of a clamping jaw is arranged on the clamping jaw, the other end of the first connecting rod is hinged with a first pivot arranged on the connecting plate, a rod body of the first connecting rod is hinged with one end of the second swing rod, one end of the second connecting rod is hinged with a rod body of the second swing rod, the other end of the second swing rod is hinged with a second pivot arranged on the connecting plate, the first swing rod is parallel to the second swing rod, and the first connecting rod is parallel to; the connecting line of the axes of the first pivot and the second pivot is parallel to the first swing rod and the second swing rod, and the arc center of the claw is positioned on the extension line of the connecting line of the axes of the first pivot and the second pivot; the telescopic driving mechanism further comprises a driving member for driving the first swing rod or the second swing rod to swing.

5. The wastewater treatment system according to claim 4, wherein: the driving component comprises a deflector rod coaxially and fixedly connected with the first oscillating rod or the second oscillating rod, the end part of the deflector rod is provided with a roller, a groove-shaped rail is arranged beside the spoke frame, and the roller is positioned in the groove-shaped rail and forms rolling fit with the groove-shaped rail; the groove-shaped track comprises a first section and a second section, the first section and the second section are both arc-shaped, arc centers of the first section and the second section are located on an axis of the rotating shaft, the curvature radius of the first section is smaller than that of the second section, the second section is located in a covering range of a wrap angle of the material stirring roller and the conveying net belt, the first section and the second section are in smooth transition, and the groove-shaped track is fixedly connected with the rack.

6. The wastewater treatment system according to claim 5, wherein: a plurality of the spoke frames and the arc-shaped plates are uniformly arranged at intervals along the circumferential direction of the rotating shaft; a plurality of movable hook claws are uniformly arranged at intervals along the length direction of the arc-shaped plate, and all the movable hook claws on the same arc-shaped plate share the same first pivot and the same second pivot; the arc-shaped plate is provided with a groove for containing the connecting plate and an arc-shaped groove for containing the first pivot and the second pivot, and the arc center of the arc-shaped groove is superposed with the arc center of the movable hook claw.

7. The wastewater treatment system according to claim 5, wherein: the conveying direction of the cutting end of the conveying mesh belt on the material poking roller is horizontally or obliquely arranged downwards.

8. The wastewater treatment system according to claim 1, wherein: the part of the conveying mesh belt extending out of the sewage pool is provided with an upper layer of belt surface and a lower layer of belt surface, wherein the solid garbage recycling mechanism is arranged at a turning-back position between the upper layer of belt surface and the lower layer of belt surface, and the solid garbage recycling mechanism comprises a material collecting hopper.

9. The wastewater treatment system according to claim 8, wherein: the floccule recycling mechanism comprises a cleaning box, the lower layer of belt surface of the conveying net belt penetrates through the cleaning box, roller brushes are arranged in the cleaning box, the roller brushes are arranged in pairs and are respectively arranged on two sides of the lower layer of belt surface, an air outlet is arranged below the cleaning box, and the air outlet is connected with the suction type filter.

10. The wastewater treatment system according to claim 9, wherein: the cleaning box is characterized in that a drying device is further arranged at the upper stream of the cleaning box and comprises a box body, a lower layer belt surface penetrates through the box body, an electric heating device is arranged in the box body, and an exhaust port is formed in the box body.