CN214714557U - Water inlet system of sedimentation tank, sedimentation tank and sewage treatment system - Google Patents

Abstract

The utility model discloses a water intake system, sedimentation tank and sewage treatment system of sedimentation tank, drainage system set up on the sedimentation tank top for the clear water after the sediment of discharging, it includes: the water inlet pipe and the dosing pipe are arranged at the top of the tank; the first reactor is respectively communicated with the water inlet pipe and the dosing pipe; a first concentration tube in communication with the reactor; a second reactor in communication with the first concentrator tube; a second concentration tube in communication with the reactor; and the slow release pipe is communicated with the second concentration pipe. The utility model discloses a sedimentation tank's water inlet system is through setting up add the pencil first reactor the second reactor has simplified and has added the medicine process, has cancelled solitary reaction tank to practice thrift the construction cost, promoted the efficiency of medicine mixing reaction.

Description

Water inlet system of sedimentation tank, sedimentation tank and sewage treatment system

Technical Field

The utility model belongs to the technical field of sewage treatment, especially, relate to a water intake system, sedimentation tank and sewage treatment system of sedimentation tank.

Background

The sedimentation tank is a device for removing suspended matters in water and purifying water quality by applying sedimentation. The working principle is to remove suspended substances in water by utilizing the natural sedimentation or coagulating sedimentation effect of water, and the sedimentation effect is determined by the flow rate of the water in the sedimentation tank and the retention time of the water in the tank. Sedimentation tanks have wide market requirements and applications in the field of water treatment, and sedimentation tank technology is used in almost all water treatment projects. In practical application of the existing sedimentation tank, the dosing process is complex, and the drug mixing reaction efficiency is low.

SUMMERY OF THE UTILITY MODEL

Objects of the invention

The utility model aims at providing a water intake system, sedimentation tank and sewage treatment system of sedimentation tank add the medicine process in order to solve among the prior art complicated, the technical problem that the medicine mixing reaction efficiency is low.

(II) technical scheme

In order to solve the above problem, the first aspect of the present invention provides a water inlet system for a sedimentation tank, the water inlet system is disposed on the top of the sedimentation tank for making sewage enter the sedimentation tank and/or adding medicine into sewage, which comprises: the water inlet pipe is arranged at the top of the tank; the dosing pipe is arranged at the top of the tank; the first reactor is respectively communicated with the water inlet pipe and the dosing pipe; a first concentrator tube in communication with the reactor, the first concentrator tube having an axial area less than a cross-sectional area of the first reactor; a second reactor in communication with the first concentrator tube; a second concentrator tube in communication with the reactor, the second concentrator tube having an axial area less than a cross-sectional area of the second reactor; a delay tube in communication with the second concentration tube.

Further, the outlet of the slow release pipe is positioned in the center of the sedimentation tank.

Further, the outlet of the slow release pipe is connected with a liquid distribution device.

Further, still include: and the water inlet valve is arranged on the water inlet pipe and used for controlling the water inlet pipe to start/stop water inlet.

Further, still include: the center position of the slow release pipe and the center position of the sedimentation tank are on the same vertical straight line.

Further, the dosing pipe is connected with a timing metering valve, and the other end of the timing metering valve is connected with a medicine tank.

According to the utility model discloses a still another aspect provides a sedimentation tank, its characterized in that, includes the water intake system of sedimentation tank of any one of above-mentioned scheme.

Further, still include: and the sludge discharge system is arranged at the bottom of the pool and is used for discharging sediments. Wherein, row's mud system includes: the first sludge discharge groove is a plurality of V-shaped grooves which are arranged in parallel; the second sludge discharge groove is a plurality of V-shaped grooves which are arranged in parallel, and the V-shaped grooves of the first sludge discharge groove and the V-shaped grooves of the second sludge discharge groove are staggered and parallel; the number of the sludge discharge pipes is the sum of the number of the V-shaped grooves of the first sludge discharge groove and the number of the V-shaped grooves of the second sludge discharge groove; the plurality of sludge discharge pipes are respectively arranged at the bottoms of the V-shaped grooves of the first sludge discharge groove and the second sludge discharge groove; the sludge discharge pipe arranged at the bottom of the first sludge discharge groove penetrates through the V-shaped bulge between the V-shaped grooves of the two second sludge discharge grooves; and mud inlet holes are formed in the parts of the mud discharging pipes, which are arranged in the V-shaped grooves of the first mud discharging groove and the second mud discharging groove.

Further, still include: the water drainage system is arranged at the top of the sedimentation tank and used for discharging the settled clean water; wherein the drainage system comprises: the scum baffle is arranged in the tank wall, is matched with the tank wall in shape and surrounds the whole sedimentation tank; and the scum baffle is used as one side plate of the drainage channel, and the other side plate of the drainage channel and the top end of the scum baffle are at the same horizontal height.

According to another aspect of the utility model, a sewage treatment system is provided, including any one of the above-mentioned scheme sedimentation tank.

(III) advantageous effects

The above technical scheme of the utility model has following profitable technological effect:

the utility model discloses a sedimentation tank's water inlet system is through setting up add the pencil first reactor the second reactor has simplified and has added the medicine process, has cancelled solitary reaction tank to practice thrift the construction cost, promoted the efficiency of medicine mixing reaction.

Drawings

Fig. 1 is a schematic view of a water intake system of a settling tank according to an embodiment of the present invention.

Fig. 2 is a schematic view of a water intake system of a settling tank according to another embodiment of the present invention.

Fig. 3 is a schematic view of a drainage system of a settling tank according to still another embodiment of the present invention.

Fig. 4 is a schematic view of a settling tank according to yet another embodiment of the present invention.

Reference numerals:

1: a sludge discharge system; 11: a first sludge discharge groove; 12: a second sludge discharge groove; 13: a sludge discharge pipe; 131: a mud inlet hole; 14: a mud discharge main pipe; 140: a valve; 2: a drainage system; 21: a scum baffle; 22: a drainage channel; 23: a dovetail groove; 3: a water intake system; 31: a water inlet pipe; 32: a medicine feeding pipe; 33: a first reactor; 34: a first concentration tube; 35: a second reactor; 36: a second concentration tube; 37: a slow release tube; 38: liquid distribution device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

A schematic diagram of a layer structure according to an embodiment of the invention is shown in the drawing. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, as actually required.

It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.

The existing sedimentation tank is a treatment structure for removing suspended particles with density larger than that of water from water by utilizing gravity sedimentation, is one of the most widely applied treatment units in sewage treatment, and can be used for primary treatment of sewage, post-treatment of biological treatment and advanced treatment. The sedimentation tank is divided according to the water flow direction and can be divided into a horizontal flow type sedimentation tank, a radial flow type sedimentation tank and a vertical flow type sedimentation tank. The sedimentation tank comprises a water inlet area, a sedimentation area, a buffer area, a sludge area and a water outlet area. The water inlet area and the water outlet area have the functions of enabling water flow to uniformly flow through the sedimentation tank, avoiding the adverse effects of short flow and reduction of turbulent flow on sedimentation, reducing a dead water area and improving the volume utilization rate of the sedimentation tank; the settling zone is also called a clarification zone, namely a working zone of the settling tank, and is a zone where sediments can be separated from sewage; the sludge settling area is an area for storing, concentrating and discharging sludge; the buffer zone is a water layer zone for dividing the settling zone and the sludge zone, and ensures that the settled matters are not floated again due to the stirring of water flow.

The sludge at the bottom of the existing sedimentation tank is generally uniformly settled and stacked at the bottom of the tank. The existing sludge discharge scheme is that a sludge discharge pipeline is usually constructed at the bottom of a pool, sludge at the bottom of the pool enters from the perforated sludge discharge pipeline, the perforated sludge discharge pipeline is connected to a main sludge discharge pipe, and the main sludge discharge pipe is provided with a sludge discharge main valve for controlling sludge discharge. When the valve is opened to discharge sludge, sludge at the bottom of the tank close to one end of the main sludge discharge pipe enters the pipeline to be discharged. Because bottom of the pool mud is even tiling distribution, keeps away from house steward one end mud and has not been arranged to the greatest extent, and front end mud just has been the evacuation, and a large amount of moisture gets into the mud pipe from the hole of front end, leads to the unable discharge of mud of distal end to lead to the discharged mud water content too high.

Fig. 1 is a schematic view of a water intake system of a settling tank according to an embodiment of the present invention.

Fig. 2 is a schematic view of a water intake system of a settling tank according to another embodiment of the present invention.

As shown in fig. 1 and fig. 2, in an embodiment of the present invention, there is provided a water inlet system of a sedimentation tank, wherein the water inlet system 3 is disposed on the top of the sedimentation tank, and is used for making sewage enter the sedimentation tank and/or adding chemicals into the sewage, and comprises: a water inlet pipe 31 provided at the top of the tank; a dosing pipe 32 arranged at the top of the tank; the first reactor 33, the first reactor 33 is respectively communicated with the water inlet pipe 31 and the dosing pipe 32; a first concentration tube 34, the first concentration tube 34 being in communication with the reactor, and the axial area of the first concentration tube 34 being smaller than the cross-sectional area of the first reactor 33; a second reactor 35, said second reactor 35 being in communication with said first concentrator tube 34; a second concentration tube 36, the second concentration tube 36 being in communication with the reactor, and the axial area of the second concentration tube 36 being smaller than the cross-sectional area of the second reactor 35; a slow release tube 37 in communication with the second concentration tube 36. Through setting up add pencil 32 first reactor 33 second reactor 35 has simplified the medicine process of adding, has cancelled independent reaction tank to practice thrift the construction cost, promoted the efficiency of medicine mixing reaction.

In an alternative embodiment, the outlet of the slow release tube 37 is located in the center of the sedimentation tank.

In an alternative embodiment, the outlet of the slow release pipe 37 is connected with a liquid distribution device 38.

The water inlet pipe 31 is controlled by a water inlet valve, and the pipeline and the top surface of the sedimentation tank are horizontally arranged. The water inlet pipe 31 extends to the central position of the sedimentation tank and bends downwards by 90 degrees, and is vertically opened downwards and connected with the reactor.

The dosing pipe 32 and the water inlet pipe 31 are both arranged at the top of the tank or communicated with each other, the dosing pipe 32 is connected with a timing metering valve, and the other end of the dosing pipe is connected with a medicine tank.

In an alternative embodiment, the first reactor 33 is located at the center of the sedimentation tank, vertically connected to the water inlet pipe, and vertically extended downward to the center of the tank body. The first reactor 33 and the second reactor 35 of the reactor have two or more times of thickness change, the thick tube is the reactor, the thin tube is the concentration tube, the second concentration tube 36 and the first concentration tube 34, and the tail end of the reaction tube is connected with the slow release tube 37.

The center of the slow release pipe 37 is vertically connected with the reaction pipe and is parallel to the water level of the sedimentation tank.

Fig. 4 is a schematic view of a drainage system of a settling tank according to still another embodiment of the present invention.

As shown in fig. 4, in another embodiment of the present invention, a sedimentation tank is provided, which includes the water inlet system 1 of the sedimentation tank according to any one of the above technical solutions.

In an optional embodiment, the sedimentation tank may further include: and a sludge discharge system 1 arranged at the bottom of the tank and used for discharging sediments. Wherein, the sludge discharge system 1 may include: the first sludge discharge groove 11 is a plurality of V-shaped grooves arranged in parallel; the second sludge discharge groove 12 is a plurality of V-shaped grooves which are arranged in parallel, and the V-shaped grooves of the first sludge discharge groove 11 and the V-shaped grooves of the second sludge discharge groove 12 are staggered and parallel; the number of the sludge discharge pipes 13 is the sum of the number of the V-shaped grooves of the first sludge discharge groove 11 and the number of the V-shaped grooves of the second sludge discharge groove 12; the plurality of sludge discharge pipes 13 are respectively arranged at the bottoms of the V-shaped grooves of the first sludge discharge groove 11 and the second sludge discharge groove 12; the sludge discharge pipe 13 arranged at the bottom of the first sludge discharge groove 11 penetrates through the V-shaped bulge between the V-shaped grooves of the two second sludge discharge grooves 12; the mud discharging pipe 13 is provided with mud inlet holes 131 at the V-shaped groove parts of the first mud discharging groove 11 and the second mud discharging groove 12. The utility model discloses a sedimentation tank has promoted mud discharging efficiency through setting up crisscross V type groove end and parallel row's mud pipe of laying to can evenly inhale the bottom of the pool mud, reduce the moisture that the mud pipe brought out, improve row's mud efficiency and play mud quality. Wholly promote work efficiency, simplify the facility simultaneously, reduced construction and operation maintenance cost, promoted play mud quality and play water quality.

Through setting up crisscross first sludge discharge groove 11 with second sludge discharge groove 12 to and parallel laying sludge discharge pipe 13 has promoted mud discharge efficiency to can evenly inhale the bottom of the pool mud, reduce the moisture that sludge discharge pipe brought out, improve sludge discharge efficiency and play mud quality.

In an optional embodiment, the sludge discharge system 1 may further include: arrange mud house steward 14, arrange mud house steward 14 and set up outside the pool wall of sedimentation tank, it is a plurality of arrange mud pipe 13 respectively with arrange mud house steward 14 is connected.

In an alternative embodiment, a valve 140 is provided on the sludge discharge pipe 13. The valve 140 is used for controlling each sludge discharge pipe 13 to start/stop discharging sludge respectively.

In an alternative embodiment, a valve 140 is provided on the sludge discharge main 14. The valve 140 is used for controlling the mud discharging main pipe 14 to start/stop discharging mud.

In an optional embodiment, the sedimentation tank may further include: and the drainage system 2 is arranged at the top of the sedimentation tank and is used for discharging the settled clean water.

In an alternative embodiment, the drainage system 2 may comprise: a scum baffle 21, which is arranged inside the tank wall and matches the shape of the tank wall, surrounds the entire settling tank. The scum baffle 21 forms a guide chute (drainage path) with the tank wall.

In an alternative embodiment, the scum baffle 21 and the pool wall form an outlet diversion trench (drainage path) with the width of about 30mm and the depth of about 500mm, so that the traditional outlet trench without a water channel baffle is replaced, and the outlet water quality is improved.

In an alternative embodiment, the drainage system 2 may comprise: and a drain channel 22 disposed on a top of the scum baffle 21, wherein the scum baffle 21 serves as one side plate of the drain channel 22, and the other side plate of the drain channel 22 is at the same level as a top end of the scum baffle 21.

In an alternative embodiment, the dross baffle 21 has a dovetail groove 23 at the top.

The dovetail 23 is arranged at the sedimentation tank top, lays with pool wall parallel, and remains about 30 mm's space between the pool wall, and the dross baffle 21 upper end in the dovetail 23 outside is dovetail 23, and lower extreme downwardly extending is about 500mm does dross baffle 21, when the surface of water height of sedimentation tank reached the height of dovetail 23, the gap between dross baffle 21 and the pool wall formed out the water guiding gutter, and the clear water is through going out the water guiding gutter, crosses dovetail 23 again, flows into water drainage channel 22. Scum foam and the like usually appearing on the water surface of the sedimentation tank can not enter the drainage channel 22, so that scum is not attached to the discharged water, and the quality of the discharged water is improved.

Fig. 3 is a schematic view of a drainage system according to yet another embodiment of the present invention.

In an alternative embodiment, as shown in fig. 3, the drainage system 2 may comprise: and the drainage channel 22 is arranged on the outer side of the top of the pool wall, the pool wall is used as one side plate of the drainage channel 22, and the other side plate of the drainage channel 22 is at the same level with the top end of the pool wall.

In an alternative embodiment, the top of the pool wall has a dovetail groove 23.

In an alternative embodiment, the drain channel 22 communicates with a drain line.

The dovetail groove 23 is arranged at the top of the sedimentation tank, the lower end of the scum baffle 21 extends downwards for about 500mm to form the scum baffle 21, when the water level of the sedimentation tank reaches the height of the dovetail groove 23, a water outlet diversion trench is formed in a gap between the scum baffle 21 and the tank wall, and clean water passes through the water outlet diversion trench and then passes over the dovetail weir to flow into the drainage channel 22. Scum foam and the like usually appearing on the water surface of the sedimentation tank can not enter the water outlet tank, so that the scum is not attached to the outlet water, and the quality of the outlet water is improved.

In an optional embodiment, a valve is arranged on the drainage pipeline. The valve is used to control the drainage system 2 to start/stop drainage.

The existing sedimentation tank often has lighter dross to float on the surface of water, and the dross together crosses the dovetail along with the clear water, flows into the drainage canal, influences the play water quality. The utility model discloses a clear water in the sedimentation tank can rise along the route that dross baffle 21 and pool wall constitute, stride across dovetail 23 and get into and discharge behind the drainage channel 22. Through the width that reduces the drainage route and arrange mud around the pool wall of sedimentation tank, effectually avoided the dross to flow along with the clear water, improved the quality of drainage, increased sewage treatment's efficiency.

In an alternative embodiment, a restriction is provided between the scum baffle 21 and the tank wall. By means of the flow restriction, the width of the drainage path between the scum baffle 21 and the tank wall is further reduced, further reducing scum carried along with the clean water.

In an alternative embodiment, the dross baffle 21 is spaced from the wall by: 20-50 mm.

In an alternative embodiment, the drainage system 2 may further comprise: a drain pipe which is communicated with the drain channel 22 and is provided with a valve.

Through the drainage channel 22 outside the design of dross baffle 21, the cooperation of dross baffle 21 and pool wall has restricted the width in play water route, has more restricted the discharge of mainly concentrating the dross at the cell body center, and the main region of dross has been kept away from in the play water route of narrow, has avoided the surface of water dross to get into drainage channel 22 to the play water quality of water has been improved.

In another embodiment of the present invention, a sewage treatment system is provided, which comprises the sedimentation tank according to any one of the above technical solutions.

The raw water gets into a reactor with sedimentation tank parallel arrangement with power promotion or gravity from the mode of flowing, carries out intensive mixing with the chemical reagent that adds simultaneously and stirs and take place the reaction, make the suspended solid behind the quick flocculation and formation alum blossom, enter into the settling zone of sedimentation tank, buffer zone, form and sink solid thing, realize solid-water separation, the rivers after settling clear are through the pipe chute that sets up in the middle of the sedimentation tank, rise to the pond top and discharge through horizontal weir overflow drainage canal 22, it is external through discharging device to sink solid thing to the V type groove concentration back in bottom of the pool mud district.

After a period of natural precipitation or coagulating sedimentation, the cement in the sedimentation tank is layered, the upper middle layer is clear water, and the lower layer is sludge.

The drainage channel 22 is arranged at the top of the sedimentation tank, the drainage channel 22 is flush with the upper end of the tank wall and surrounds the tank wall for a circle, and the clear water on the upper layer after the sedimentation reaction flows into the drainage channel 22 through the dovetail groove 23 and then flows into the drainage pipe to enter the next procedure.

The whole work efficiency that has promoted has reduced construction and operation maintenance cost, has promoted play mud quality and play water quality.

The utility model discloses a sedimentation tank work flow:

the user opens the water inlet valve and sewage enters the first reactor 33 through the water inlet pipe 31.

The user opens the timed metering valve and the medicament enters the first reactor 33 through the dosing tube 32.

The sewage and the medicine are primarily mixed and reacted in the first reactor 33, then flow into the first concentration pipe 34, enter the second reactor 35 after primary concentration, and the sewage after primary reaction is impacted and stirred in the pipe wall to be fully mixed and reacted with the added medicine.

The sewage and the medicament after the mixing reaction flow into the slow release pipe 37, and are uniformly distributed and discharged into the sedimentation tank after passing through the slow release pipe 37 to the liquid distribution device 38 communicated with the slow release pipe 37.

After entering the sedimentation tank, the sewage flowing into the sedimentation tank undergoes flocculation reaction, and the agglomerated suspended matters fall into the bottom of the tank to form sludge through coagulating sedimentation under the action of gravity.

Mud is evenly deposited at the bottom of the pool, because the slot structure of bottom of the pool, mud is concentrated in second mud groove 12 with the tank bottom in the V type groove of first mud groove 11, mud is under self gravity and water pressure effect, through each on the mud pipe 13 go into mud hole 131, flow into mud pipe 13, open valve 140, mud in the mud pipe 13 gets into discharge behind the mud main pipe 14. Sludge in each area of the bottom of the pond respectively enters the corresponding sludge discharge pipe 13, and the situation that the sludge close to one section of the sludge discharge main pipe 14 is completely sucked and flows into clean water, and the sludge at the far end is not completely sucked does not occur.

The clean water in the sedimentation tank forms a diversion trench with the tank wall through the scum baffle 21, and then flows into the drainage channel 22 after passing through the dovetail groove 23. The valve on the drainage pipeline is opened, and the clean water in the drainage channel 22 is discharged by the drainage pipeline for reuse. Scum foam and the like usually appearing on the water surface of the sedimentation tank can not enter the drainage channel 22, so that scum is not attached to the discharged water, and the quality of the discharged water is improved.

The utility model discloses aim at protecting water intake system, sedimentation tank and sewage treatment system of a sedimentation tank, drainage system sets up on the sedimentation tank top for the clear water after the sediment of discharging, include: a water inlet pipe 31 provided at the top of the tank; a dosing pipe 32 arranged at the top of the tank; the first reactor 33, the first reactor 33 is respectively communicated with the water inlet pipe 31 and the dosing pipe 32; a first concentration tube 34, the first concentration tube 34 being in communication with the reactor, and the axial area of the first concentration tube 34 being smaller than the cross-sectional area of the first reactor 33; a second reactor 35, said second reactor 35 being in communication with said first concentrator tube 34; a second concentration tube 36, the second concentration tube 36 being in communication with the reactor, and the axial area of the second concentration tube 36 being smaller than the cross-sectional area of the second reactor 35; a slow release tube 37 in communication with the second concentration tube 36. Through setting up add pencil 32 first reactor 33 second reactor 35 has simplified the medicine process of adding, has cancelled independent reaction tank to practice thrift the construction cost, promoted the efficiency of medicine mixing reaction.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. The utility model provides a water intake system of sedimentation tank, water intake system (3) set up at the sedimentation tank top for make sewage get into the sedimentation tank and/or to adding the medicine in the sewage, its characterized in that, it includes:

a water inlet pipe (31) arranged on the top of the tank;

a dosing pipe (32) arranged at the top of the tank;

the first reactor (33), the first reactor (33) is respectively communicated with the water inlet pipe (31) and the dosing pipe (32);

a first concentration tube (34), the first concentration tube (34) being in communication with the reactor, and an axial area of the first concentration tube (34) being less than a cross-sectional area of the first reactor (33);

a second reactor (35), the second reactor (35) being in communication with the first concentrator tube (34);

a second concentration tube (36), the second concentration tube (36) being in communication with the reactor, and the axial area of the second concentration tube (36) being less than the cross-sectional area of the second reactor (35);

a slow-release tube (37) which is communicated with the second concentration tube (36).

2. The intake system of a sedimentation tank of claim 1,

the outlet of the slow release pipe (37) is positioned in the center of the sedimentation tank.

3. A water intake system of a sedimentation tank according to claim 1 or 2,

the outlet of the slow release pipe (37) is connected with a liquid distribution device (38).

4. A sedimentation tank water intake system according to claim 1 or 2, further comprising:

a water inlet valve disposed on the water inlet pipe (31) for controlling the water inlet pipe (31) to start/stop water inlet.

5. A sedimentation tank water intake system according to claim 1 or 2, further comprising:

the central position of the slow release pipe (37) and the central position of the sedimentation tank are on the same vertical line.

6. A water intake system of a sedimentation tank according to claim 1 or 2,

the dosing pipe (32) is connected with a timing metering valve, and the other end of the timing metering valve is connected with a medicine tank.

7. A sedimentation tank, characterized by comprising the intake system of a sedimentation tank according to any one of claims 1 to 6.

8. A sedimentation tank as claimed in claim 7, further comprising:

a sludge discharge system (1) arranged at the bottom of the tank and used for discharging sediment,

wherein the sludge discharge system (1) comprises:

the first sludge discharge groove (11) is a plurality of V-shaped grooves which are arranged in parallel;

the second sludge discharge groove (12) is a plurality of V-shaped grooves which are arranged in parallel, and the V-shaped grooves of the first sludge discharge groove (11) and the V-shaped grooves of the second sludge discharge groove (12) are staggered and parallel;

the number of the sludge discharge pipes (13) is the sum of the number of the V-shaped grooves of the first sludge discharge groove (11) and the number of the V-shaped grooves of the second sludge discharge groove (12); the plurality of sludge discharge pipes (13) are respectively arranged at the bottoms of the V-shaped grooves of the first sludge discharge groove (11) and the second sludge discharge groove (12);

the sludge discharge pipe (13) arranged at the bottom of the first sludge discharge groove (11) penetrates through a V-shaped bulge between the V-shaped grooves of the two second sludge discharge grooves (12);

and mud inlet holes (131) are formed in the parts, arranged in the V-shaped grooves of the first mud discharging groove (11) and the second mud discharging groove (12), of the mud discharging pipes (13).

9. A sedimentation tank as claimed in claim 7, further comprising:

the water drainage system (2) is arranged at the top of the sedimentation tank and is used for discharging the settled clean water;

wherein the drainage system (2) comprises:

a scum baffle (21) which is arranged in the tank wall, is matched with the shape of the tank wall and surrounds the whole sedimentation tank;

and the drainage channel (22) is arranged at the top of the scum baffle (21), the scum baffle (21) is used as one side plate of the drainage channel (22), and the other side plate of the drainage channel (22) is at the same horizontal height as the top end of the scum baffle (21).

10. A sewage treatment system comprising a sedimentation tank according to any one of claims 7 to 9.

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