CN108623039B

CN108623039B - System for be used for sewage processing

Info

Publication number: CN108623039B
Application number: CN201810266557.8A
Authority: CN
Inventors: 骆登科; 尹新安; 石玉广; 张永旺; 孙鹏
Original assignee: Ningxia Environmental Protection Group Co Ltd
Current assignee: Ningxia Environmental Protection Group Co., Ltd
Priority date: 2018-03-28
Filing date: 2018-03-28
Publication date: 2021-01-26
Anticipated expiration: 2038-03-28
Also published as: CN108623039A; CN112479430A

Abstract

The invention discloses a system for sewage processing, which comprises a primary treatment tank, a filter tank arranged at the rear side of the primary treatment tank, a flocculation sedimentation tank arranged at the rear side of the filter tank and a disinfection chamber arranged at the rear side of the flocculation sedimentation tank, wherein the filter tank is arranged at the front side of the primary treatment tank; the flocculation sedimentation tank comprises a tank body; a first water inlet communicated with the filtering tank is formed in the lower portion of the side wall of the primary treatment tank, and a second water inlet communicated with the flocculation sedimentation tank is formed in the middle upper portion of the side wall of the filtering tank; the sedimentation device is arranged in the tank body, the second water inlet is arranged below the sedimentation device, and the water outlet is arranged above the lower portion of the sedimentation device. According to the invention, the sewage is subjected to primary treatment and filtration and then flocculation operation, so that impurities and large granular substances in the sewage can be removed, the flocculation effect is improved, and the effluent quality is improved; secondly, set up the disinfection room, sewage can carry out disinfection treatment after the processing is accomplished, effectively removes the toxic substance in the sewage, guarantees the safe and healthy of the play water of sewage treatment back.

Description

System for be used for sewage processing

Technical Field

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

Background

In the existing sewage treatment, a plurality of processing procedures such as filtration, flocculation and precipitation are generally needed for sewage, but the traditional treatment system has poor flocculation and precipitation effects on sewage, and the sewage still can carry more precipitates when yielding water, so that the quality of the yielding water is influenced. Secondly, the sewage is not disinfected after processing, and the toxic substances in the sewage are difficult to be completely removed.

Disclosure of Invention

The invention provides a system for processing sewage, which overcomes the defects of the prior art and has good water quality and safe water body after treatment.

In order to achieve the purpose, the invention adopts the following technical scheme: a system for sewage processing comprises a primary treatment tank, a filter tank arranged at the rear side of the primary treatment tank, a flocculation sedimentation tank arranged at the rear side of the filter tank and a disinfection chamber arranged at the rear side of the flocculation sedimentation tank; the flocculation sedimentation tank comprises a tank body, a stirring part, a feeding chamber and a discharge switch matched with the feeding chamber, wherein a transmission mechanism is arranged in the tank body, and the stirring part opens the discharge switch through the transmission mechanism; a first water inlet communicated with the filtering tank is formed in the lower portion of the side wall of the primary treatment tank, and a second water inlet communicated with the flocculation sedimentation tank is formed in the middle upper portion of the side wall of the filtering tank; the sedimentation device is arranged in the tank body, the second water inlet is arranged below the sedimentation device, and the water outlet is arranged above the lower portion of the sedimentation device. According to the invention, the sewage is subjected to primary treatment and filtration and then flocculation operation, so that impurities and large granular substances in the sewage can be removed, the flocculation effect is improved, and the effluent quality is improved; secondly, a disinfection chamber is arranged, so that the sewage can be disinfected after being processed, toxic substances in the sewage can be effectively removed, and the safety and health of the effluent after sewage treatment are ensured; the settling device is arranged, so that flocs carried in the water body flowing to the water outlet in the water body can be settled again by the settling device when the water body is discharged, the flocs are prevented from being carried when the water body is discharged, and the quality of discharged water is ensured to be good; the water inlet is arranged at the lower part of the sedimentation device, so that the inflow water flow is not influenced by the sedimentation device, and the inflow water body can be ensured to fully react with the flocculating agent;

secondly, a feeding part is arranged, and the flocculating agent for treatment can be added into the tank body at equal time intervals through the feeding part, so that the conditions that all flocculating agents are added together to cause excessive flocculating agents and the like are avoided; the stirring part can stir the sewage, so that the flocculating agent is quickly dissolved after the flocculating agent is added, the reaction between the flocculating agent and pollutants in the sewage is accelerated, and the sewage treatment efficiency is improved; the feeding chamber is arranged and can contain the flocculating agent, so that a large amount of flocculating agent can be added into the feeding chamber in the use process, the traditional manual multiple flocculating agent addition is avoided, the operation is convenient, and the labor cost is reduced; the discharging switch arranged at the lower end can be opened and closed at equal time intervals to equally add the treatment flocculating agent into the tank body at equal time intervals, so that the situation that excessive flocculating agent is difficult to dissolve or excessive flocculating agent is added is avoided, the transmission mechanism is arranged, and the stirring component opens the discharging switch through the transmission mechanism, so that after the stirring component rotates, the discharging switch can continuously release the flocculating agent into the tank along with the rotation of the stirring component, and the flocculating agent can be quickly dissolved, mixed and reacted once falling into sewage under stirring, so that pollutants in the water can be quickly neutralized; and this mode has avoided additionally even devices such as motor to open the blowing switch, has reduced the use cost of device, and at whole opening process, adopts pure mechanical device simultaneously, and the difficult emergence of device is damaged long service life.

Further, a filter element is arranged at the second water inlet; through the setting of filtering piece, can filter the large granule impurity in the water in advance, promote the effect of later stage flocculation.

Further, a third water inlet is formed in the upper portion of the side wall of the primary treatment pool, and a grid is arranged at the bottom of the primary treatment pool; and (4) removing the garbage in the sewage through grid treatment, and performing primary filtering processing.

Furthermore, the sedimentation device comprises two cross rods and a plurality of connecting rods arranged between the two cross rods and distributed at intervals, and each connecting rod is correspondingly provided with a group of sedimentation components; the setting of the multiple groups of sedimentation components has good sedimentation effect, and the quality of the discharged water is further improved.

Further, the sedimentation assembly comprises a plurality of sedimentation plates which are uniformly distributed at intervals along the length direction of the connecting rod; through the slope setting of settling plate, better settling the flocculation thing, and the flocculation thing that deposits on settling plate will slide to the bottom of the pool along settling plate's gradient.

Further, the settlement plate is arranged in an inclined mode, and an included angle formed between the axis of the settlement plate and the axis of the connecting rod is 60 degrees.

Further, the transmission mechanism comprises a transmission component matched with the stirring component and a switch component used for starting the emptying switch, and the switch component is matched with the transmission component; the transmission part can transmit kinetic energy on the stirring part and can also fix the lower end part of the stirring part, so that the working stability of the stirring part is ensured, and the stirring part is prevented from shaking in the tank body; the arrangement of the switch component can open the emptying switch under the pushing of the transmission component, so that the materials are synchronously put into the tank body when the stirring component works.

Further, the switch component comprises a movable rod for opening the discharging switch and a pushing piece for pushing the movable rod to move upwards; the second piston is matched with the pushing piece; the movable rod moves upwards to further push the discharging switch to be opened, the pushing piece is arranged and moves through the pushing piece, and therefore the movable rod is jacked.

In conclusion, the sewage is subjected to primary treatment and filtration and then flocculation operation, so that impurities and large granular substances in the sewage can be removed, the flocculation effect is improved, and the effluent quality is improved; secondly, set up the disinfection room, sewage can carry out disinfection treatment after the processing is accomplished, effectively removes the toxic substance in the sewage, guarantees the safe and healthy of the play water of sewage treatment back.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the flocculation sedimentation tank in the invention.

Fig. 3 is a schematic structural view of the support frame of the present invention.

Fig. 4 is an enlarged view of a in fig. 2.

Fig. 5 is an enlarged view of B in fig. 2.

Fig. 6 is an enlarged view of C in fig. 2.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

As shown in fig. 1 to 6, a system for sewage treatment includes a primary treatment tank 10, a filtering tank 20 disposed at the rear side of the primary treatment tank, a flocculation settling tank disposed at the rear side of the filtering tank, and a sterilizing chamber 30 disposed at the rear side of the flocculation settling tank; specifically, the primary treatment tank 10 and the filter tank 20 are both made of stainless steel or cement, and the disinfection chamber 30 is a contact disinfection tank; a first water inlet 101 is arranged at the lower part of the side wall of the primary treatment tank 10, and the first water inlet 101 is communicated with the filter tank 20; the upper part of the side wall of the primary treatment pool 10 is provided with a third water inlet 103, the third water inlet 103 is connected with a water inlet pipe, the bottom of the primary treatment pool 10 is provided with a grid 104, the grid is directly purchased on the market, and the grid can be arranged in a plurality of ways without limitation.

A second water inlet 201 is arranged at the middle upper part of the side wall of the filtering tank 20, and the second water inlet 201 is communicated with the flocculation sedimentation tank; preferably, a filter 202 is arranged at the second water inlet 201, and the filter 202 is a stainless steel net; further, the flocculation sedimentation tank comprises a tank body 1, a stirring part 2 and a feeding part 3, the stirring part 2 comprises a rotating part 21 and a stirring paddle 22, the rotating part 21 is a metal rod, the rotating part 21 is driven by a motor to rotate, and the stirring paddle 22 is connected with the rotating part 21 and is used for stirring the sewage in the tank body 1; the feeding part 3 comprises a feeding chamber 31 and a discharging switch 32, the feeding chamber 31 is a metal barrel connected with the tank body 1, the bottom of the feeding chamber 31 is provided with an opening, a flocculating agent in the feeding chamber 31 can come out from the opening and then fall into the tank body 1, the discharging switch 32 is arranged at the opening, the discharging switch 32 is a metal plate, and the discharging switch 32 is movably connected with the bottom of the feeding chamber 31; the opening is blocked by the discharge switch 32; a transmission mechanism 4 is arranged in the tank body 1, and the rotating piece 21 can push open the discharging switch 32 through the transmission mechanism 4, so that the flocculating agent is discharged from an opening at the bottom of the charging chamber 31.

Further, a sedimentation device 7 is arranged in the tank body 1, a water outlet 12 is arranged on the side wall of the tank body 1 corresponding to the upper part of the sedimentation device, the water inlet is connected with a stainless steel water inlet pipe 14, and the second water inlet 201 is arranged at the lower part of the sedimentation device 7; specifically, the sedimentation device 7 comprises a support frame 71, a plurality of groups of sedimentation components 72 distributed on the support frame at intervals, and a support part 73 arranged in the tank body and matched with the support frame; the support frame 71 comprises two cross rods 711 and a plurality of connecting rods 712 which are arranged between the two cross rods and are uniformly distributed at intervals, and two ends of each connecting rod 712 are respectively welded with the two cross rods; the supporting portion 73 is a strip-shaped protruding strip 731 formed by outwards extending the inner wall of the tank body, a strip-shaped convex portion 33 is also arranged on the side wall of the discharging chamber 3, one of the two cross rods is arranged on the supporting portion 73, the other cross rod is arranged on the strip-shaped convex portion 33, and therefore the supporting of the supporting frame is achieved, and the supporting frame is limited on the upper portion of the water outlet.

Each connecting rod 712 is correspondingly provided with a group of sedimentation assemblies 72; specifically, the settling component 72 includes a plurality of stainless steel settling plates 721, the settling plates 721 are obliquely arranged, welded and fixedly connected to the connecting rod, and evenly distributed along the length direction of the connecting rod 712 at intervals; preferably, the angle between the axis of the settling plate 721 and the axis of the connecting rod 712 is 60 °.

Further, a positioning column 10 is arranged at the bottom of the tank body 1, the positioning column 10 is a metal column, a bearing 101 is sleeved on the positioning column 10, an inner metal ring of the bearing 101 is fixedly connected with the positioning column 10, and an outer metal ring of the bearing can rotate; a placing cavity 11 is arranged on the tank body 1, and part of parts in the transmission mechanism 4 are arranged in the placing cavity 11; the arrangement of the placing cavity can facilitate the hidden installation of the moving part and avoid the corrosion of the moving part, and the arrangement of the resetting piece can quickly restore to the original position after the moving part moves upwards, so that the situation that the moving part is retained to open the discharging switch for a long time is avoided; and locating part and anticreep piece are mutually supported, can fix the both ends of piece that resets, and the guarantee makes the compression of the piece that resets at the in-process that the movable rod upwards moved about.

Specifically, the transmission mechanism 4 includes a transmission component 41 and a discharge component 42, the transmission component 41 includes a receiving part 411 and a hydraulic part 412, specifically, the receiving part 411 includes a rotating disc 401, a rotating shaft 402 fixed on the rotating disc 401 and a reduction gear 403; the rotating disc 401 is a metal disc, the side wall of the rotating disc 401 is provided with teeth, the lower end surface of the rotating disc 401 is fixedly connected with the outer metal ring of the bearing 101, so that the rotating disc can rotate relative to the positioning column 10, the middle part of the rotating disc 401 is provided with a convex column 403, the rotating shaft 402 is sleeved on the convex column 403 and can rotate relative to the convex column 403, and the outer wall of the rotating shaft 402 is provided with teeth; one side of the reduction gear 404 is meshed with the side wall teeth of the rotating disc 401, and the other side of the reduction gear is meshed with the side wall of the rotating shaft 402, so that a sun planetary gear set is formed; furthermore, the upper part of the rotating shaft 402 is a hexagonal prism, and the rotating member 21 is provided with a hexagonal prism-shaped cavity, so that the lower part of the rotating member 21 is sleeved on the rotating shaft 402, and the rotating shaft 402 can rotate along with the rotating member 21, and further the rotating disc 401 rotates along with the rotating; a push protrusion 413 is arranged on the lower end surface of the rotary disc 401, the lower part of the push protrusion 413 is an arc-shaped surface, and the push protrusion 413 is eccentrically arranged on the lower part of the rotary disc 401.

Further, the hydraulic part 412 is arranged in the placing cavity 11, the hydraulic part 412 includes a first piston 416, a second piston 418 and a cylinder 414, the first piston 416 is arranged at one end of the cylinder 414, the second piston 418 is arranged at the other end of the cylinder 414, hydraulic oil is filled between the first piston 416 and the second piston 418, an opening is arranged at the bottom of the tank body 1, the first piston 416 extends out of the opening, and the first piston 416 and the side wall of the opening are in sealed connection, the specific sealed connection may be a thin elastic sheet, a through hole is arranged in the middle of the elastic sheet, the upper end of the first piston 416 passes through the through hole, and then the elastic sheet is welded with the first piston 416; the outer edge of the elastic sheet is welded with the edge of the opening to realize sealing; the pushing protrusion 413 contacts with the upper end of the first piston 416 during the rotation of the rotating disc 401, and presses the first piston 416 downward to push the second piston 418 to move outward, and a return spring 417 is connected to the lower end of the first piston 416, and the end of the return spring 417 contacts with the inner wall of the cylinder 414, so that the return spring 417 can jack up the first piston 416 again, and the pushing protrusion 413 is convenient to push the first piston 416 again; the end part of the cylinder is plugged by the first piston and the second piston, liquid is filled in the cylinder, the first piston is enabled to move towards the inside of the cylinder under the pressing of the first piston pushing convex part, and then the liquid in the cylinder is pressed to move towards the direction of the second piston, so that the second piston is pushed out outwards; the same reset spring is arranged, the first piston can be reset by the reset spring after the convex part is pushed, and the pressure of the inner wall is reduced after the first piston is reset, so that the second piston can be restored to the original position under the external pressure, the pressure difference is fully utilized to enable the second piston to move in the whole process, and the kinetic energy on the rotating part is effectively converted.

The stirring paddle is driven by the rotating piece to stir the sewage, so that pollutants in the sewage are quickly reacted with the flocculating agent; the rotating piece is inserted into the bearing piece, the bearing piece is driven to rotate through the rotation of the rotating piece, the preliminary transmission of kinetic energy on the stirring component is realized, the lower part of the rotating piece is fixed by the bearing piece, the rotation of the rotating piece cannot be influenced, the vibration in the rotating process of the rotating piece can be reduced, the hydraulic piece and the pushing convex part are arranged, the pushing convex part is driven to rotate along with the rotating piece in the rotating process of the bearing piece, the hydraulic piece is driven to work once when the pushing convex part rotates for one circle, the moving piece is driven to move by the hydraulic piece, the discharging switch is opened once, the time interval for pushing the convex part to rotate for one circle in the process is constant, the discharging frequency of the discharging switch in the opening process is constant, the opening size of the discharging switch in each discharging process can be adjusted, and the flocculating agent entering the sewage can be completely dissolved and reacted in the time interval, the utilization rate of the flocculating agent is improved, and the waste of the flocculating agent is reduced; and through the hydraulic mode, it has avoided mechanical transmission, and is wearless, only need ensure that its inside liquid volume is invariable can, this mode still can adapt to various different position installations, in the installation, only need install the pipeline, then install a piston with pipeline inner wall sealing contact at both ends can, the shape of its pipeline, crooked degree all have no influence to this hydraulic part transmission, avoid in traditional installation, mechanical transmission need consider mechanical shape etc..

Further, the material placing component 42 is arranged in the placing cavity 11, the material placing component 42 includes a movable rod 421 and a pushing member 422, the movable rod 421 is sleeved with a resetting member 425, the resetting member 425 is a spring, an extending portion is arranged on the inner wall of the placing cavity 11, and the upper end of the resetting member 425 abuts against the extending portion; the lower end part is clamped on the movable rod 421, and the upper end part of the movable rod 421 is contacted with one end of the emptying switch 32, so that one end of the emptying switch 32 is pushed upwards, and the other end moves downwards; a concave hole is arranged at the lower end part of the movable rod 421, and a ball 424 is arranged in the concave hole; the pushing member 422 is a metal block with a pushing inclined plane 423, one end of the pushing member 422 is connected with a spring, and the second piston 418 pushes the other end of the pushing member 422; therefore, after the second piston 418 pushes the pushing member 422 to move in one direction, the spring resets the pushing member 422, and during this time, the ball 424 of the movable rod 421 moves upward along the pushing slope 423, thereby lifting the movable rod 421; the movable rod 421 opens the discharging switch 32; a plurality of convex parts 427 are arranged on the push inclined surface 421, the convex parts 427 are convex ribs, and the balls 424 can roll over the convex parts 427; the pushing inclined plane is arranged to gradually push the pushing piece upwards in the pushing process; set up the bellying on the piece that resets, when the ball rolled the bellying, made the movable rod take place the ascending shake of longitudinal direction to the blowing switch also can take place the shake, and this shake can shake out the flocculating agent of blowing switch department, has avoided pulverous flocculating agent extrusion to enter into the opening part of blowing switch smoothly, has ensured the flocculating agent to the sewage in.

An elastic member 319 is connected to the end of the discharging switch 32, the elastic member 319 is a spring, and one end of the elastic member 319 is fixedly connected to the inner wall of the placing chamber 11, so that after the movable rod 421 moves downward, the elastic member 319 can restore the discharging switch 32 to close the opening at the bottom of the loading chamber 31.

Specifically, when the device works, the rotating member 21 drives the rotating shaft 402 to rotate, and when the rotating shaft 402 rotates, the reducing gear 403 is driven to rotate so as to drive the rotating disc 401 to rotate; during the rotation of the rotary disk 401, the push protrusion 413 collides with the upper end portion of the first piston 416, and since the lower portion of the push protrusion 413 and the upper portion of the first piston 416 are both arc-shaped, the push protrusion 413 presses the first piston 416 to move downward, the first piston 416 presses the hydraulic oil in the cylinder 414, the second piston 418 is pushed by the hydraulic oil to move outwards, the second piston 418 pushes the pushing member 422 to move rightwards, so that the balls 424 move upwards along the pushing inclined surface 423, during the upward movement of the ball 424 along the push slope 423, the movable rod 421 moves upward, and the movable rod 421 pushes the discharge switch 32 to open, so that the flocculant is discharged from the feeding chamber 31, during the opening process, due to the arrangement of the convex portion 427, the movable rod 421 will continuously shake up and down, the discharging switch 32 is continuously shaken, so that the flocculating agent is ensured to be smoothly discharged from the feeding chamber 31; meanwhile, when the pushing protrusion 413 is not in contact with the upper end of the first piston 416, the return spring 417 moves the first piston 416 upward, so that the second piston 418 moves leftward, and the pushing member 422 is reset again by the spring, during the resetting process, the movable rod 421 moves downward by the action of the reset member 425, and the elastic member 319 pulls one end of the discharging switch 32 to move downward, so that the discharging switch 32 closes the opening at the lower end of the charging chamber 31, and thus, the whole device completes a discharging process in one cycle.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. A system for sewage processing comprises a primary treatment tank (10), a filter tank (20) arranged at the rear side of the primary treatment tank, a flocculation sedimentation tank arranged at the rear side of the filter tank and a disinfection chamber (30) arranged at the rear side of the flocculation sedimentation tank; the flocculation sedimentation tank comprises a tank body (1), a stirring part (2), a feeding chamber (31) and a discharging switch (31) matched with the feeding chamber (31), wherein a transmission mechanism (4) is arranged in the tank body (1), and the stirring part (2) opens the discharging switch (31) through the transmission mechanism (4); the method is characterized in that: a first water inlet (101) communicated with the filtering tank (20) is formed in the lower portion of the side wall of the primary treatment tank (10), and a second water inlet (201) communicated with the flocculation sedimentation tank is formed in the middle upper portion of the side wall of the filtering tank (20); a sedimentation device (7) is arranged in the tank body (1), the second water inlet is arranged below the sedimentation device, a water outlet (12) is arranged above the sedimentation device, and the water outlet (12) is connected with the disinfection chamber through a pipeline;

the transmission mechanism (4) comprises a transmission component (41) matched with the stirring component (2) and a switch component (42) used for opening the emptying switch (32), and the switch component (42) is matched with the transmission component (41);

the switch component (42) comprises a movable rod (421) for opening the discharging switch (31) and a pushing piece (422) for pushing the movable rod (421) to move upwards; the stirring component 2 comprises a rotating piece 21 and a stirring paddle 22;

the transmission component (41) comprises a bearing piece (411) and a hydraulic piece (412), wherein the bearing piece (411) comprises a rotating disc (401), a rotating shaft (402) fixed on the rotating disc (401) and a reduction gear (403); the rotating disc (401) is a metal disc, the side wall of the rotating disc (401) is provided with a tooth, the lower end face of the rotating disc (401) is fixedly connected with an outer metal ring of the bearing (101) and can rotate relative to the positioning column (10), a convex column (403) is arranged at the middle part of the rotating disc (401), the rotating shaft (402) is sleeved on the convex column (403) and can rotate relative to the convex base (403), and the outer wall of the rotating shaft (402) is provided with the tooth; one side of the reduction gear (404) is meshed with the side wall teeth of the rotating disc (401), and the other side of the reduction gear is meshed with the side wall of the rotating shaft (402);

the upper part of the rotating shaft (402) is a hexagonal prism, and the rotating piece (21) is provided with a hexagonal prism-shaped cavity, so that the lower part of the rotating piece (21) is sleeved on the rotating shaft (402), the rotating shaft (402) can rotate along with the rotating piece (21), and the rotating disc (401) rotates along with the rotating; a pushing convex part (413) is arranged on the lower end face of the rotating disc (401), the lower part of the pushing convex part (413) is an arc-shaped face, and the pushing convex part (413) is eccentrically arranged on the lower part of the rotating disc (401);

the hydraulic part (412) is arranged in the placing cavity (11), the hydraulic part (412) comprises a first piston (416), a second piston (418) and a cylinder (414), the first piston (416) is arranged at one end of the cylinder (414), the second piston (418) is arranged at the other end of the cylinder (414), hydraulic oil is filled between the first piston (416) and the second piston (418), an opening is formed in the bottom of the tank body (1), the first piston (416) extends out of the opening, and the first piston (416) is in sealing connection with the side wall of the opening;

the middle of the elastic sheet is provided with a through hole, the upper end of the first piston (416) penetrates through the through hole, and then the elastic sheet is welded with the first piston (416); the outer edge of the elastic sheet is welded with the edge of the opening to realize sealing; the pushing convex part (413) is contacted with the upper end part of the first piston (416) in the rotating process of the rotating disc (401), the first piston (416) is pressed downwards to push the second piston (418) to move outwards, meanwhile, a return spring (417) is connected to the lower end part of the first piston (416), and the end part of the return spring (417) is contacted with the inner wall of the cylinder body (414), so that the return spring (417) can jack the first piston (416) up again, and the pushing convex part (413) is convenient to push the first piston (416) again;

the rotating piece (21) drives the rotating shaft (402) to rotate, and when the rotating shaft (402) rotates, the reducing gear (403) is driven to rotate so as to drive the rotating disc (401) to rotate; during the rotation of the rotating disc (401), the pushing convex part (413) collides with the upper end part of the first piston (416), because the lower part of the pushing convex part (413) and the upper part of the first piston (416) are both arranged in an arc shape, the pushing convex part (413) presses the first piston (416) to move downwards, the first piston (416) presses hydraulic oil in the cylinder (414), the second piston (418) is pushed to move outwards by the hydraulic oil, the second piston (418) pushes the pushing part (422) to move rightwards, so that the ball (424) moves upwards along the pushing inclined plane (423), during the period that the ball (424) moves upwards along the pushing inclined plane (423), the movable rod (421) moves upwards, and the movable rod (421) pushes the discharging switch (32) to be opened, so that the flocculating agent is discharged from the charging chamber (31).

2. A system for wastewater processing according to claim 1, characterized in that: a filter element (202) is arranged at the second water inlet (201).

3. A system for wastewater processing according to claim 1, characterized in that: and a third water inlet (103) is formed in the upper part of the side wall of the primary treatment pool (10), and a grid (104) is arranged at the bottom of the primary treatment pool (10).

4. A system for wastewater processing according to claim 2, characterized in that: the sedimentation device (7) comprises two cross rods (711) and a plurality of connecting rods (712) which are arranged between the two cross rods and distributed at intervals, and each connecting rod (712) is correspondingly provided with a group of sedimentation components (72).

5. A system for wastewater processing according to claim 4, characterized in that: the settling assembly (72) comprises a plurality of settling plates (721) which are uniformly distributed at intervals along the length direction of the connecting rod (712).

6. A system for wastewater processing according to claim 5, characterized in that: the settlement plate (721) is obliquely arranged, and an included angle between the axis of the settlement plate (721) and the axis of the connecting rod (712) is 60 degrees.