CN211198827U

CN211198827U - Sedimentation system

Info

Publication number: CN211198827U
Application number: CN201920948119.XU
Authority: CN
Inventors: 吕冲
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-08-07
Anticipated expiration: 2029-06-21

Abstract

The utility model discloses a sedimentation system. Comprises a slotted pipe, a sediment discharge pipeline valve, a pump settled water backflow pipeline valve, a flushing tank pipeline valve, a funnel-shaped sedimentation tank, a sedimentation tank mud discharge pipeline valve, a funnel-shaped final sedimentation tank and a mud blocking baffle. The method comprises the steps that a mud blocking plate is installed on one side of two outermost circles of transverse near-sedimentation tanks of a folded plate flocculation tank, folded plate flocculation tank vertical folded plates are installed on the bottom of each folded plate, a grooving pipe vertically penetrating through the bottom of the tank is installed at the bottom of each folded plate, two ends of the grooving pipe are respectively exposed out of the folded plate flocculation tank, exposed parts on two sides of the grooving pipe are respectively connected with a transverse pipeline, the grooving pipe is led to an ultimate tank bottom tank through a valve, a water pump is installed on a clear water sedimentation part of the ultimate tank bottom tank, a water outlet pipeline of the water pump is divided. One path is led to the bottom of the ultimate tank bottom through a valve. The bottom of the ultimate pool bottom is funnel-shaped, the bottom of the sedimentation pool is funnel-shaped, a slotted sludge discharge pipeline is vertically arranged at the funnel-shaped bottom, and two ends of the slotted sludge discharge pipeline are exposed respectively and lead to the ultimate pool bottom through a valve elbow.

Description

Sedimentation system

Technical Field

The utility model relates to a sedimentation system, precipitate and water can in time separate when concretely relates to deposits, and arrange the simple and convenient sedimentation system of mud.

Background

The sedimentation tank is used for settling impurities and precipitable substances in water to obtain settled and clear water within a required usable range. The method mainly comprises the steps that raw water flows into a medicine adding pool through a balance pool, medicine is added and flows into a reaction pool to react, impurities can be flocculated in a flocculation pool, and settled clear water is settled in a sedimentation pool. The sediment is sucked out by a siphon mud scraper. At present siphon mud scraper is because of can't judge whether the vacuum pump is used for evacuating in the siphon of mud and the ascending position of liquid level with siphon mud scraper, so often with the deposit and the water suction vacuum pump of sedimentation tank bottom in, lead to the vacuum pump to damage. In addition, partial sediments can exist in the flocculation process of the raw water in the flocculation tank, but no facility capable of discharging in time exists, so that most of the sediments settled at the bottom of the flocculation tank can flow into the sedimentation tank under the action of water flow, part of the sediments remained in the folded plate flocculation tank continue to settle in the sedimentation tank, the sediments settled at the bottom of the sedimentation tank are sucked out by the siphon sludge scraper which is transported back and forth and discharged into a trench, so that the sedimentation effect is influenced by the back and forth movement of the siphon sludge scraper, the continuous sludge pumping process of the siphon sludge scraper is also wasted for water, in order to reduce the waste of water and the reduction of sludge discharge amount, the current solution is to discharge sludge at intervals, thus the loss rate of the siphon sludge scraper is increased due to the start and stop of the siphon sludge scraper, and the siphon sludge scraper cannot move due to the excessive thickness of the sediments at the bottom of the sedimentation tank, the siphon pipe mud machine can only suck out the original precipitate, the precipitate at the bottom of the whole sedimentation tank cannot be sucked away, and at the moment, water in the real sedimentation tank and the flocculation tank only needs to be discharged for manual flushing, so that time and labor are wasted, and water is wasted.

Disclosure of Invention

For solving the problem that exists among the prior art, the utility model aims to provide a sedimentation system, mud, water in time separate when this sedimentation system can realize deposiing, do not influence sedimentation system when arranging mud and deposit the operation, easy operation, and improve the effect of deposiing greatly.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a sedimentation system comprises a balance tank, a dosing stirring tank, a reaction tank, a folded plate flocculation tank, a sedimentation tank and an ultimate sedimentation tank, wherein the balance tank is connected with the dosing stirring tank which is connected with the reaction tank; the reaction tank is arranged in the middle of the folded plate flocculation tank, water treated by the reaction tank can flow into the folded plate flocculation tank, a folded plate flocculation tank sediment discharge pipe is arranged between every two folded plates at the bottom of the folded plate flocculation tank, an outlet of the folded plate flocculation tank sediment discharge pipe penetrates out of the folded plate flocculation tank, an open slot for sediment to flow into is formed in the part, located in the folded plate flocculation tank, of the folded plate flocculation tank sediment discharge pipe in the axial direction of the folded plate flocculation tank sediment discharge pipe, the end parts of all the folded plate flocculation tank sediment discharge pipes are connected to a folded plate flocculation tank sediment discharge pipeline, and the folded plate flocculation tank sediment discharge pipeline is communicated to the final sedimentation tank; the outlet of the folded plate flocculation tank is communicated with the sedimentation tank; the final sedimentation tank is arranged below the sedimentation tank, the bottom of the sedimentation tank is communicated with the final sedimentation tank through a sedimentation tank sludge discharge pipeline, and an open slot for the inflow of sediments is formed in the part of the sedimentation tank sludge discharge pipeline, which is positioned in the sedimentation tank, along the axial direction of the sedimentation tank sludge discharge pipeline; a clear water collecting tank is arranged at the upper part of the sedimentation tank; and a blow-off pipe is arranged at the bottom of the final sedimentation tank.

The top of equalizing basin and the top of adding the medicine stirring pond pass through the pipeline intercommunication, are provided with the valve on this pipeline, and the bottom that adds the medicine stirring pond passes through the reaction tank water inlet pipeline and communicates to the bottom of reaction tank, and the bottom of reaction tank is provided with the reaction tank mud pipe.

The bottom of the two outermost circles of the folded plate flocculation tank near one side of the sedimentation tank is provided with a mud blocking baffle for blocking sediments.

The device also comprises a water pump, a water suction pipe of the water pump is communicated with the clarified water part of the final sedimentation tank, a water outlet pipe of the water pump is divided into two paths through a three-way pipe, one path of clarified water is communicated to the dosing stirring tank through a clarified water reflux pipeline of the sedimentation tank, the other path of flushing tank pipeline is communicated to the bottom of the final sedimentation tank, and valves are arranged on the clarified water reflux pipeline of the sedimentation tank and the flushing tank pipeline.

And the folded plate flocculation tank sediment discharge pipeline is communicated to the middle positions above and below the final sedimentation tank.

The export of folded plate flocculation basin is equipped with unhurried current wall and guide wall to sedimentation tank entry direction in proper order, sets up the water hole of crossing that supplies water to pass through on the unhurried current wall, and the guide wall can be with the water conservancy diversion of the unhurried current wall of flowing through to the bottom of sedimentation tank.

The bottom of sedimentation tank is equipped with the pipe chute otter board that is used for filterable, and a plurality of apopores that communicate with the clarified water collecting pit are seted up on the upper portion of sedimentation tank.

The sedimentation tank is provided with a water outlet collecting filter tank at the inlet of the water outlet hole.

The sedimentation tank sludge discharge pipeline is provided with a valve, the valve is positioned at the upper edge of the bent pipe part of the sedimentation tank sludge discharge pipeline and close to one end of the sedimentation tank, and the outlet of the sedimentation tank sludge discharge pipeline leads to the upper and lower middle positions of the final sedimentation tank.

The bottom of the sedimentation tank and the bottom of the final sedimentation tank are both funnel-shaped or V-shaped.

The utility model has the advantages as follows:

the utility model discloses a sedimentation system utilizes the open slot on the folded plate flocculation basin deposit discharge pipe can be in time arrange the deposit that the folded plate flocculation basin subsides gets off toward ultimate sedimentation tank to effectual reduction flows toward the deposit of sedimentation tank. Meanwhile, sediment precipitated from the sedimentation tank can be timely discharged to a final sedimentation tank by utilizing a sedimentation tank sludge discharge pipeline at the bottom of the sedimentation tank, so that the sludge and water in the sedimentation tank can be timely separated, and the sedimentation effect of the sedimentation tank is greatly improved. The utility model discloses not only save cost, the maintenance expense of siphon mud scraper, improved the sediment effect, the displacement when having practiced thrift row mud. And the using amount of coagulant and other medicaments is reduced, the operation flow is simplified, and the method is economical and applicable and has high efficiency and emission reduction.

Further, the bottom of the nearly sedimentation tank one side of folded plate flocculation basin two outermost circles all is equipped with the mud baffle that hinders that is used for blockking the precipitate, hinders the mud baffle and can block that the precipitate that gets off at folded plate flocculation basin continues to flow toward the sedimentation tank to make what make the precipitate as much as possible arrange to ultimate sedimentation tank through folded plate flocculation basin precipitate discharge pipe, realize the timely separation of mud and water in the folded plate flocculation tank, reduced the sedimentation pressure of sedimentation tank, improved precipitation efficiency.

Furthermore, a water outlet pipe of the water pump is divided into two paths by a three-way pipe, one path of water is led to the dosing stirring tank through a clarified water reflux pipeline of the sedimentation tank, and the other path of flushing tank pipeline is led to the bottom of the final sedimentation tank; and pumping clear water of muddy water discharged from the folded plate flocculation tank and the sedimentation tank sludge discharge pipeline which flow into the final sedimentation tank by using a water pump to the chemical adding stirring tank for secondary sedimentation, thereby realizing the operation of a sedimentation system. The secondary sedimentation and the backflow of clarified water of the final sedimentation tank are utilized, so that the reduction of the water discharge amount during sludge discharge is realized, and the stable, efficient and continuous operation of the sedimentation tank is ensured.

Furthermore, the flow speed of water and the disorder degree of water flow can be reduced by utilizing the flow slowing wall, the timely and effective separation of mud and water in the folded plate flocculation tank is realized, and the amount of sediment carried by the effluent of the folded plate flocculation tank is reduced.

Furthermore, the effluent collecting filter tank can further filter the powder clarified water on the upper part of the sedimentation tank, can also stabilize the water body in the sedimentation tank, reduce the vibration and ensure the sedimentation effect.

Drawings

FIG. 1 is a schematic diagram of the sedimentation system of the present invention;

FIG. 2 is a first operational schematic of the settling system of the present invention;

figure 3 is a second operational schematic of the sedimentation system of the present invention.

In the figure, 1-raw water inlet pipeline, 2-balance tank, 3-dosing stirring tank, 4-reaction tank sludge discharge pipe, 5-folded plate flocculation tank, 6-folded plate flocculation tank sediment discharge pipeline, 7-final sedimentation tank, 8-buffer wall, 9-sedimentation tank, 10-guide wall, 11-inclined pipe net plate, 12-effluent water collecting filter tank, 13-clear water collecting tank, 14-sedimentation tank sludge discharge pipeline, 15-water pump, 16-sedimentation tank clear water return pipeline, 17-valve, 18-flushing tank pipeline, 19-valve, 20-valve, 21-valve, 22-folded plate flocculation tank sediment discharge pipe, 23-clear water discharge pipe, 24-reaction tank water inlet pipeline, 25-reaction tank, 26-blow-off pipe, 27-a blowoff valve, 28-a damping baffle, 29-a water pump, 30-a water outlet hole, 31-an open slot and 32-the outermost two circles of a folded plate flocculation tank.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Referring to fig. 1 to 3, the sedimentation system of the present invention comprises a balance tank 2, a dosing agitation tank 3, a reaction tank 25, a folded plate flocculation tank 5, a sedimentation tank 9 and an ultimate sedimentation tank 7, wherein the balance tank 2 is connected with the dosing agitation tank 3, and the dosing agitation tank 3 is connected with the reaction tank 25; the reaction tank 25 is arranged in the middle of the folded plate flocculation tank 5, water treated by the reaction tank can flow into the folded plate flocculation tank 5, a folded plate flocculation tank sediment discharge pipe 22 is arranged between every two folded plates at the bottom of the folded plate flocculation tank 5, an outlet of the folded plate flocculation tank sediment discharge pipe 22 penetrates out of the folded plate flocculation tank 5, an open slot for sediment to flow into is formed in the part, located in the folded plate flocculation tank 5, of the folded plate flocculation tank sediment discharge pipe 22 in the axial direction of the folded plate flocculation tank sediment discharge pipe 22, the end parts of all the folded plate flocculation tank sediment discharge pipes 22 are connected to the folded plate flocculation tank sediment discharge pipeline 6, and the folded plate flocculation tank sediment discharge pipeline 6 is communicated to the final sedimentation tank 7; the outlet of the folded plate flocculation tank 5 is communicated with the sedimentation tank 9; the final sedimentation tank 7 is arranged below the sedimentation tank 9, the bottom of the sedimentation tank 9 is communicated with the final sedimentation tank 7 through a sedimentation tank sludge discharge pipeline 14, and an open slot for the inflow of sediments is formed in the part of the sedimentation tank sludge discharge pipeline 14, which is positioned inside the sedimentation tank 9, along the axial direction of the sedimentation tank sludge discharge pipeline 14; a clarified water collecting tank 13 is arranged at the upper part of the sedimentation tank 9; the bottom of the final sedimentation tank 7 is provided with a sewage draining pipe 26.

As the utility model discloses an optimal scheme, the pipeline intercommunication is passed through with the top that adds medicine stirring pond 3 at the top of equalizing basin 2, is provided with the valve on this pipeline, adds the bottom of medicine stirring pond 3 and feeds through to the bottom of reaction tank 25 through reaction tank inlet line 24, and the bottom of reaction tank 25 is provided with reaction tank mud pipe 4.

As the preferred scheme of the utility model, the bottom of folded plate flocculation basin 5 two outermost circles nearly sedimentation tank 9 one side all is equipped with and is used for blockking hindering mud baffle 28 of precipitate.

As the utility model discloses a preferred scheme, the utility model discloses a sedimentation system still includes water pump 29, and water pump 29's water absorption pipe leads to the clarified water position of ultimate sedimentation tank 7, and water pump 29's outlet pipe is divided into two the tunnel through the three-way pipe, leads to adding medicine stirring tank 3 through sedimentation tank clarified water backflow pipeline 16 all the way, and another way dashes the bottom that pond pipeline 18 leads to ultimate sedimentation tank 7, and sedimentation tank clarified water backflow pipeline 16 all is equipped with the valve on dashing pond pipeline 18.

As the preferred scheme of the utility model, the folded plate flocculation tank sediment discharge pipeline 6 leads to the intermediate position above and below the final sedimentation tank 7.

As the utility model discloses an optimal scheme, the export of folded plate flocculation basin 5 is equipped with unhurried current wall 8 and guide wall 10 to 9 entry orientations in proper order in sedimentation tank, sets up the water hole of crossing that supplies water to pass through on the unhurried current wall 8, and guide wall 10 can be with the bottom of the water conservancy diversion to sedimentation tank 9 of unhurried current wall 8 of flowing through.

As the preferred scheme of the utility model, the bottom of sedimentation tank 9 is equipped with and is used for filterable pipe chute otter board 11, and a plurality of apopores 30 that communicate with clarified water collecting pit 13 are seted up on the upper portion of sedimentation tank 9.

As the preferred scheme of the utility model, sedimentation tank 9 is equipped with a water catchment filter tank 12 at the entrance of apopore 30.

As the utility model discloses a preferred scheme is provided with valve 21 on the mud pipeline 14 is arranged to the sedimentation tank, and valve 21 is located the higher authority that 14 return bends of mud pipeline position are arranged to the sedimentation tank and is close to 9 one ends of sedimentation tank, and the export of sedimentation tank mud pipeline 14 leads to the intermediate position about ultimate sedimentation tank 7.

As the preferred scheme of the utility model, the bottom of the sedimentation tank 9 and the bottom of the final sedimentation tank 7 are both funnel-shaped or V-shaped.

Examples

In this embodiment, the existing raw water sedimentation tank of a chemical plant is taken as an example

Structural improvement design

Referring to fig. 1-3, the system is improved for sedimentation and sludge discharge in a sedimentation tank. A mud blocking baffle 28 is arranged on one side of the transverse outermost two circles of folded plates of the folded plate flocculation tank 5, which is close to the sedimentation tank 9, as shown in fig. 3, the mud blocking baffle 28 is arranged on one side of the transverse outermost two circles of folded plates of the folded plate flocculation tank 5, which is close to the sedimentation tank 9, at the other end of the folded plate flocculation tank sediment discharge pipe 22 provided with the mud blocking baffle 28; the mud blocking baffle is made of concrete, the height of the mud blocking baffle is the lowest height, and the mud blocking baffle can block sediments, and the height is usually between 1 m and 1.5 m. The mud baffle that hinders of folded plate flocculation basin 5 outermost two circles is respectively in the horizontal outermost round and the past round on folded plate flocculation basin nearly sedimentation tank 9 one side. A folded plate flocculation tank sediment discharge pipe 22 with a groove at the upper part is arranged at the bottom between every two vertical folded plates of the folded plate flocculation tank 5, and the folded plate flocculation tank 5 is exposed at the two ends of the folded plate flocculation tank sediment discharge pipe 22. The exposed part of the folded plate flocculation tank sediment discharge pipe 22 is communicated with two folded plate flocculation tank sediment discharge pipelines 6 on two transverse sides outside the folded plate flocculation tank, and the folded plate flocculation tank sediment discharge pipelines 6 discharge the sediment flowing out of each folded plate flocculation tank sediment discharge pipe to the final sedimentation tank 7 in a concentrated manner. The final sedimentation tank 7 is beneficial to sludge discharge, the bottom of the final sedimentation tank 7 is funnel-shaped, and two sides of the bottom of the final sedimentation tank 7 are provided with a sewage discharge pipe 26 and a sewage discharge valve 27. A water pump 15 is arranged at a position, close to the top, of clarified water on the final sedimentation tank 7, a water discharge pipe of the water pump 15 is divided into two paths by a tee joint, one path is a flushing tank pipeline 18, the flushing tank pipeline 18 leads to the funnel-shaped bottom of the final sedimentation tank 7, the other path is a sedimentation tank clarified water return pipeline 16, the sedimentation tank clarified water return pipeline 16 leads to the dosing stirring tank 3, valves are arranged on the flushing tank pipeline 18 and the sedimentation tank clarified water return pipeline 16, and the valves are used for controlling the water flow direction. The sedimentation tank 9 is favorable for discharging sludge to the ultimate sedimentation tank 7, the bottom of the sedimentation tank 9 is also set into a funnel shape, a sedimentation tank sludge discharge pipeline 14 is installed at the bottom of the sedimentation tank 9, the part of the sedimentation tank sludge discharge pipeline 14, which is positioned in the sedimentation tank, is upwards grooved, the width of the groove opening is not more than 3cm and not less than 2cm, the outlet of the sedimentation tank sludge discharge pipeline 14 leads to the intermediate position of the ultimate sedimentation tank 7, and a valve is arranged on the sedimentation tank sludge discharge pipeline 14. In order to conveniently switch the water outlet flow direction of the water pump, the distance between a valve for controlling the flushing pipeline and a valve for controlling the clarified water backflow pipeline on the water outlet pipeline of the water pump is the closest distance. The flushing tank pipeline leads to the bottom of the ultimate settling tank, and the three-way flow distribution enables the water flow direction to flush the two rows of mud pipes of the ultimate settling tank.

(II) Assembly and use

Raw water flows into the balancing tank 2 through the raw water inlet pipeline 1, then flows into the dosing stirring tank 3 through the balancing tank 2 to be dosed, the water which is dosed and stirred in the dosing stirring tank 3 flows into the reaction tank 25, impurities in the water are condensed through the reaction of the raw water and the medicament in the reaction tank 25, and the precipitation effect of the impurities in the water is improved. Then flows into a folded plate flocculation tank 5, and the stable flow flocculation and the primary sedimentation are carried out in the folded plate flocculation tank 5. The sediment settled in the folded plate flocculation basin is discharged into a final sedimentation basin 7 through a folded plate flocculation basin sediment discharge pipeline 6. Impurities in water which are not settled in the folded plate flocculation tank slowly flow through the slow flow wall 8 along with water flow, and the guide wall 10 guides the water to flow into the sedimentation tank from the bottom of the sedimentation tank 9. Along with the inflow of the water flow, the water level of the sedimentation tank gradually rises, and secondary sedimentation is formed in the rising process of the water flow. The water flow rises in the sedimentation tank and passes through the inclined tube screen plate 11 in the sedimentation tank, and the inclined tube screen plate can block sediments rising along with the water flow, so that the sedimentation effect is improved. The ascending clear water flows into a clear water collecting tank 13 through an outlet water collecting filter tank 12, and the sediment flows into a final sedimentation tank 7 through a sedimentation tank sludge discharge pipeline 14. And the sediment muddy water flowing into the final sedimentation tank 7 is sedimentated again in the final sedimentation tank, the sediment is sedimentated at the bottom of the final sedimentation tank, and the sedimentated water is recycled to the dosing stirring tank 3 through the water pump 15 to be sedimentated again. When the water pump pumps the water in the final sedimentation tank to lower the water level of the final sedimentation tank, the folded plate flocculation tank 5 and the sedimentation tank 9 can discharge the water and the sediment settled at the bottom to the final sedimentation tank 7 through the folded plate flocculation tank sediment discharge pipeline 6 and the sedimentation tank sediment discharge pipeline 14 due to the water pressure difference, and circulation is formed. When the sediment in the final sedimentation tank 7 is settled to the position of the sedimentation tank sediment discharge pipeline 14 in the final sedimentation tank 7, a valve 20 on the folded plate flocculation tank sediment discharge pipeline 6 and a valve 21 on the sedimentation tank sediment discharge pipeline 14 are closed, a valve 19 on a flushing tank pipeline of the water pump 15 leading to the bottom of the final sedimentation tank is opened, a valve 17 on a clear water recovery pipeline of the water pump 15 leading to the dosing tank 3 is closed, and flushing operation is carried out. And after the sediment in the final sedimentation tank is mixed with the clarified water, the water pump is closed. And (4) opening the sewage discharge valves on the sewage discharge pipes on the two sides of the final sedimentation tank 7, and discharging all the muddy water in the final sedimentation tank 7.

To sum up, the utility model provides a siphon sludge scraper operation complicated, the vacuum pump frequently damages, and the big problem of the total mud blowdown discharge of sedimentation process. The equipment is simple to operate, and the siphon sludge scraper is omitted, so that the investment is reduced. The maintenance is simple, the maintenance cost is low, and the continuous operation can be realized. When in precipitation, the sludge and the water are separated in time, so that the precipitation effect is improved, the medicament use amount is reduced, and the discharge amount when the precipitate is discharged is reduced.

Claims

1. A sedimentation system is characterized by comprising a balance tank (2), a dosing stirring tank (3), a reaction tank (25), a folded plate flocculation tank (5), a sedimentation tank (9) and a final sedimentation tank (7), wherein the balance tank (2) is connected with the dosing stirring tank (3), and the dosing stirring tank (3) is connected with the reaction tank (25); the reaction tank (25) is arranged in the middle of the folded plate flocculation tank (5), water treated by the reaction tank can flow into the folded plate flocculation tank (5), a folded plate flocculation tank sediment discharge pipe (22) is arranged between every two folded plates at the bottom of the folded plate flocculation tank (5), an outlet of the folded plate flocculation tank sediment discharge pipe (22) penetrates out of the folded plate flocculation tank (5), an open slot for sediment to flow into is formed in the part, located in the folded plate flocculation tank (5), of the folded plate flocculation tank sediment discharge pipe (22) along the axial direction of the folded plate flocculation tank sediment discharge pipe (22), the end parts of all the folded plate flocculation tank sediment discharge pipes (22) are connected to a folded plate flocculation tank sediment discharge pipeline (6), and the folded plate flocculation tank sediment discharge pipeline (6) is communicated to a final sedimentation tank (7); the outlet of the folded plate flocculation tank (5) is communicated with the sedimentation tank (9); the final sedimentation tank (7) is arranged below the sedimentation tank (9), the bottom of the sedimentation tank (9) is communicated with the final sedimentation tank (7) through a sedimentation tank sludge discharge pipeline (14), and an open slot for the inflow of sediments is formed in the part of the sedimentation tank sludge discharge pipeline (14) positioned in the sedimentation tank (9) along the axial direction of the sedimentation tank sludge discharge pipeline (14); a clarified water collecting tank (13) is arranged at the upper part of the sedimentation tank (9); a sewage discharge pipe (26) is arranged at the bottom of the final sedimentation tank (7).

2. The sedimentation system according to claim 1, wherein the top of the balancing tank (2) is communicated with the top of the dosing stirring tank (3) through a pipeline, a valve is arranged on the pipeline, the bottom of the dosing stirring tank (3) is communicated to the bottom of the reaction tank (25) through a reaction tank water inlet pipeline (24), and a reaction tank sludge discharge pipe (4) is arranged at the bottom of the reaction tank (25).

3. A sedimentation system according to claim 1, characterised in that the bottom of the outermost two rings of the folded plate flocculation basin (5) near the sedimentation basin (9) are provided with sludge-blocking baffles (28) for blocking sediment.

4. The sedimentation system according to claim 1, further comprising a water pump (29), wherein a water suction pipe of the water pump (29) is connected to a clarified water part of the final sedimentation tank (7), a water outlet pipe of the water pump (29) is divided into two paths through a three-way pipe, one path is connected to the dosing stirring tank (3) through a clarified water return pipeline (16) of the sedimentation tank, the other path is connected to the bottom of the final sedimentation tank (7) through a flushing tank pipeline (18), and valves are arranged on the clarified water return pipeline (16) of the sedimentation tank and the flushing tank pipeline (18).

5. A sedimentation system according to claim 1, characterised in that the folded plate flocculation basin sediment discharge line (6) opens into an intermediate position above and below the final sedimentation basin (7).

6. The sedimentation system according to claim 1, wherein a slow flow wall (8) and a guide wall (10) are sequentially arranged from the outlet of the folded plate flocculation tank (5) to the inlet of the sedimentation tank (9), a water through hole for water to pass through is formed in the slow flow wall (8), and the guide wall (10) can guide the water flowing through the slow flow wall (8) to the bottom of the sedimentation tank (9).

7. A sedimentation system according to claim 1, characterised in that the bottom of the sedimentation tank (9) is provided with a pipe chute screen (11) for filtering, and the upper part of the sedimentation tank (9) is provided with a plurality of water outlet holes (30) communicating with the clarified water collection tank (13).

8. A sedimentation system according to claim 7, characterised in that the sedimentation basin (9) is provided with a catchment filter (12) at the inlet of the outlet opening (30).

9. A sedimentation system according to claim 1, characterised in that a valve (21) is arranged in the sedimentation tank sludge discharge line (14), the valve (21) being located at the upper side of the elbow of the sedimentation tank sludge discharge line (14) near one end of the sedimentation tank (9), the outlet of the sedimentation tank sludge discharge line (14) leading to an intermediate position above and below the final sedimentation tank (7).

10. A sedimentation system according to claim 1, characterised in that the bottom of the sedimentation tank (9) and the bottom of the final sedimentation tank (7) are funnel-shaped or V-shaped.