A hydraulic stratified radiation flow multi-layer suspension sedimentation device and sedimentation method

Abstract

The present invention relates to the technical field of water quality treatment and purification, and discloses a hydraulic stratified radiation flow multi-layer suspension sedimentation device and a sedimentation method. The sedimentation device includes: a cylinder body, inside which are provided: a water inlet pipe, a plurality of inverted umbrella-shaped sedimentation devices fixed inside the cylinder body, which divide the inside of the cylinder body into multi-layer inverted conical sedimentation spaces, and the turbid water precipitates sludge in the multi-layer conical sedimentation spaces; a plurality of radiation flow water distribution devices for radially distributing the turbid water in the multi-layer inverted conical sedimentation spaces; a plurality of sludge collection guiding devices arranged between the inverted umbrella-shaped sedimentation devices and the radiation flow water distribution devices for guiding the sludge in the inverted conical sedimentation spaces so that the sludge sinks to the bottom inside the cylinder body; a drain pipe, a sludge discharging device. This hydraulic stratified radiation flow multi-layer suspension sedimentation device and sedimentation method have a small floor area, good sedimentation effect and high sedimentation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment and purification, and in particular to a hydraulic stratified radiation flow multi-layer suspension sedimentation device and a sedimentation method. Background Art

[0002] Existing sedimentation technology: Conventional sedimentation water purification structures and equipment use horizontal flow sedimentation tanks, radial flow sedimentation tanks or inclined plate sedimentation tanks. Horizontal flow sedimentation tanks occupy a large area and take a long time to settle. Radial flow sedimentation tanks take in water from the middle and expand to the surrounding areas, and then overflow to collect water, resulting in poor sedimentation effect. Inclined plate sedimentation tanks have poor sedimentation effects and are inconvenient to clean. Currently, various types of existing sedimentation devices generally have large footprints, poor sedimentation effects, high effluent turbidity, and excessive load on the subsequent filtration device, which increases the frequency of backwashing of the filtration device and wastes water resources. Summary of the invention

[0003] The invention provides a hydraulic stratified radiation flow multi-layer suspension sedimentation device and a sedimentation method, which has small footprint, good sedimentation effect and high sedimentation efficiency.

[0004] The present invention provides a hydraulic stratified radial flow multi-layer suspension sedimentation device, comprising: a cylinder, in which:

[0005] A water inlet pipe, one end of which extends into the cylinder and upward along the cylinder, and is used to transport dirty water to be treated into the cylinder;

[0006] Multiple inverted umbrella-shaped sedimentation devices are fixed in the cylinder, dividing the cylinder into multiple layers of inverted cone-shaped sedimentation spaces, and the dirty water is precipitated into sludge in the multiple layers of cone-shaped sedimentation spaces;

[0007] Multiple radial flow water distribution devices are used to radiate and distribute the dirty water in the multi-layer inverted cone sedimentation space. A radial flow water distribution device is set in each layer of the inverted cone sedimentation space. The upper and lower adjacent radial flow water distribution devices are connected in sequence. The lower radial flow water distribution device is sealed and connected to the water inlet pipe. The top of the upper radial flow water distribution device is provided with a sealing plug.

[0008] Multiple mud collecting guide devices, one mud collecting guide device is arranged between each inverted umbrella-shaped sedimentation device and the corresponding radial flow water distribution device, and is used to guide the sludge in the inverted cone-shaped sedimentation space so that the sludge sinks to the bottom of the cylinder;

[0009] A drainage pipe is arranged at the upper part of the outer wall of the cylinder, located above the upper inverted umbrella-shaped sedimentation device, and is used to discharge the water after the sludge is settled;

[0010] The mud discharge device is located at the bottom of the cylinder body and is connected to a mud discharge pipe. The mud discharge pipe extends out of the cylinder body and is used to discharge the sludge settled at the bottom of the cylinder body.

[0011] An upper part inside the cylinder body is provided with a partition board, the partition board is located above the sealing plug, a diversion pipe is fixedly arranged in the middle of the partition board, the diversion pipe is communicated with the lower part of the partition board inside the cylinder body, an outer sleeve is further arranged on the partition board outside the diversion pipe, the height of the outer sleeve is lower than that of the diversion pipe, a primary aeration zone is formed between the diversion pipe and the outer sleeve, a secondary aeration zone is formed between the outer sleeve and the inner wall of the cylinder body, and the drain pipe is communicated with the secondary aeration zone.

[0012] A plurality of water flow cutting aeration and oxygen dissolution devices are fixedly arranged between the circumferential edge of the top of the outer sleeve and the inner wall of the cylinder body for carrying out water flow cutting oxygen dissolution and secondary aeration on the water after primary aeration.

[0013] The radial flow water distribution device includes a vertical pipe and a plurality of sub-flow pipes, the plurality of sub-flow pipes are uniformly arranged on the circumference of the vertical pipe, and the inner ends are respectively communicated with the vertical pipe, the outer ends are inclined upward, a pipe joint is arranged at the lower part of the vertical pipe, the upper and lower adjacent vertical pipes are hermetically connected through the pipe joint, the radial flow water distribution device located at the lower part inside the cylinder body is hermetically connected with the upper end of the water inlet pipe through the pipe joint, and the sealing plug is arranged at the upper end of the upper vertical pipe.

[0014] The sludge collection and guiding device includes an outer ring plate, an inner ring plate and a plurality of connecting rods uniformly and fixedly arranged between the outer ring plate and the inner ring plate, a sludge guiding port is formed between the outer ring plate, the inner ring plate and two adjacent connecting rods, the inner ring plate is fixedly sleeved on the vertical pipe, the inner ring plate is located above the plurality of sub-flow pipes, and the lower end of the inverted umbrella-shaped precipitation device is fixedly arranged on the outer ring plate.

[0015] The inverted umbrella-shaped precipitation device is an inverted cone body with both upper and lower ends open, the upper end opening of the inverted cone body is hermetically fixed on the inner wall of the cylinder body, and the lower end opening of the inverted cone body is hermetically fixed on the outer ring plate.

[0016] A plurality of water permeable holes are uniformly arranged on the circumferential side surface of the inverted cone body close to the upper end opening.

[0017] The distance between two adjacent upper and lower inverted cone bodies is 5 - 30 cm.

[0018] The water flow cutting aeration and oxygen dissolution device includes a concave panel, one end of the concave panel is fixed on the edge of the overflow water port of the primary stepped aeration zone, the other end of the concave panel is fixed on the inner side surface of the circumferential direction of the cylinder body, a plurality of slot seams are arranged along the length direction inside the concave panel, and the concave panel is arranged to be inclined from the inside to the outside.

[0019] A precipitation method for a hydraulic stratified radial flow multi-layer suspended precipitation device includes the following steps:

[0020] S1. The turbid water enters the cylinder body through the water inlet pipe;

[0021] S2. The turbid water flows out from the inlet pipe and enters the radial flow water distribution device, and then radially enters the sedimentation space in a circumferential direction, and the flow velocity of the water decreases.

[0022] S3. The water precipitates sludge in the sedimentation space, and the sludge enters the sludge collection guiding device along the inverted umbrella-shaped sedimentation device.

[0023] S4. After passing through the sludge collection guiding device, the sludge falls to the bottom inside the cylinder.

[0024] S5. The water after sedimenting the sludge overflows upward along the sludge collection guiding device and enters the first-stage aeration area for first-stage aeration.

[0025] S6. The water after the first-stage aeration enters the second-stage aeration area for second-stage aeration.

[0026] S7. The water after the second-stage aeration is discharged through the drain pipe.

[0027] S8. The sludge deposited at the bottom of the cylinder is discharged outside the cylinder through the sludge discharge device and the sludge discharge pipe.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] The present invention adopts multiple inverted umbrella-shaped sedimentation devices, which can multiply the sedimentation area for the settlement of particulate matters in water, occupy a small area, improve the sedimentation effect, and increase the sedimentation water treatment capacity.

[0030] The present invention adopts the radial flow water distribution method through multiple radial flow water distribution devices, so that the influent diffuses and flows circumferentially, reducing the water flow velocity and making it difficult for impurities in the water to be carried away by the water flow.

[0031] The present invention combines multiple radial flow water distribution devices, multiple layers of inverted umbrella-shaped sedimentation devices and sludge collection guiding devices. Since the particulate matters contained in the raw water have different densities and sizes and different sedimentation velocities, the vertical upward stratified flow method is adopted, which can effectively sediment the particulate matters step by step according to the density and volume sizes.

[0032] The present invention can replace the treatment capacity of a conventional sedimentation clarifier, expand the turbidity range of the raw water, reduce the turbidity of the effluent water quality. Compared with the prior art, it has:

[0033] 1. Reduce the area of the existing sedimentation structure;

[0034] 2. Improve the sedimentation efficiency of the structure;

[0035] 3. Reduce the dosage of flocculant in the sedimentation structure;

[0036] 4. Can relax the requirements for the raw water quality and expand the turbidity range of the raw water quality. Description of the Drawings

[0037] Figure 1 This is a schematic structural diagram of the longitudinal section of a hydraulic stratified radiation flow multi-layer suspension sedimentation device provided by the present invention.

[0038] Figure 2 This is a schematic top view structural diagram of the sludge collection guiding device provided by the present invention.

[0039] Figure 3 This is a schematic top view structural diagram of an inverted umbrella-shaped sedimentation device provided by the present invention.

[0040] Figure 4 This is a schematic top view structural diagram of a water flow cutting aeration and oxygen dissolution device provided by the present invention.

[0041] Figure 5 This is a schematic longitudinal section structural diagram of a stratified radiation flow water distribution device provided by the present invention.

[0042] Explanation of reference numerals:

[0043] 1 - water inlet pipe, 2 - radiation flow water distribution device, 2 - 1 - vertical pipe, 2 - 2 - shunt water pipe, 2 - 3 - pipe joint, 3 - sludge collection guiding device, 3 - 1 - inner ring plate, 3 - 2 - outer ring plate, 3 - 3 - connecting rod, 4 - cylinder body, 5 - inverted umbrella-shaped sedimentation device, 6 - permeable hole, 7 - sealing plug, 8 - diversion pipe, 9 - outer sleeve, 10 - water flow cutting aeration and oxygen dissolution device, 10 - 1 - concave panel, 10 - 2 - slot, 11 - drain pipe, 12 - sludge discharging device, 13 - partition board. Detailed implementation manners

[0044] The following Figures 1-5 , in conjunction with the attached drawings, will describe in detail a specific implementation manner of the present invention. However, it should be understood that the protection scope of the present invention is not limited by the specific implementation manner.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the technical solution of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0046] As Figure 1 shown, the present invention discloses a hydraulic stratified radiation flow multi-layer suspension sedimentation device, including: a cylinder body 4, and arranged inside the cylinder body 4 are:

[0047] The water inlet pipe 1, one end of the water inlet pipe 1 extends into the cylinder body 4 and extends upward along the cylinder body 4, and is used to convey the turbid water to be treated into the cylinder body 4;

[0048] A plurality of inverted umbrella-shaped sedimentation devices 5 are fixed in the cylinder body 4, dividing the inside of the cylinder body 4 into multiple inverted conical sedimentation spaces, and the turbid water sediments sludge in the multiple conical sedimentation spaces;

[0049] A plurality of radial water distribution devices 2 are used to radially distribute the turbid water in the multiple inverted conical sedimentation spaces. One radial water distribution device 2 is arranged in each inverted conical sedimentation space, and the upper and lower adjacent radial water distribution devices 2 are connected in sequence. The lower radial water distribution device 2 is hermetically connected to the water inlet pipe 1, and a sealing plug 7 is provided at the top of the upper radial water distribution device 2;

[0050] A plurality of sludge collection guiding devices 3 are arranged between each inverted umbrella-shaped sedimentation device 5 and the corresponding radial water distribution device 2, and are used to guide the sludge in the inverted conical sedimentation space, so that the sludge sinks to the bottom inside the cylinder body 4;

[0051] The drain pipe 11 is arranged at the upper part of the outer wall of the cylinder body 4, above the upper inverted umbrella-shaped sedimentation device 5, and is used to discharge the water after sludge sedimentation;

[0052] The sludge discharge device 12 is located at the bottom inside the cylinder body 4, is connected to the sludge discharge pipe, and the sludge discharge pipe extends outside the cylinder body 4, and is used to discharge the sludge deposited at the bottom inside the cylinder body 4.

[0053] Through the plurality of inverted umbrella-shaped sedimentation devices 5 of the present invention, the sedimentation area for sedimentation of particulate matters in water can be increased by several times, the floor area is small, the sedimentation effect is improved, and the sedimentation water treatment capacity is increased.

[0054] Through the plurality of radial water distribution devices 2 of the present invention, the radial water distribution method is adopted, so that the influent diffuses and flows circumferentially, the water flow velocity is reduced, and the impurities in the water are not easily carried away by the water flow.

[0055] Through the combination of the plurality of radial water distribution devices 2, the plurality of inverted umbrella-shaped sedimentation devices 5 and the sludge collection guiding devices 3 of the present invention, because the particulate matters contained in the raw water have different densities and sizes and different sedimentation velocities, the vertical upward stratified flow method is adopted, and the particulate matters can be effectively stratified and sedimented step by step according to the density and size.

[0056] In order to further treat water, a partition plate 13 is provided in the upper part of the cylinder body 4. The partition plate 13 is located above the sealing plug 7. A diversion pipe 8 is fixedly provided in the middle of the partition plate. The diversion pipe 8 is communicated with the lower part of the partition plate 13 in the cylinder body 4. An outer sleeve 9 is also provided on the partition plate 13 outside the diversion pipe 8. The height of the outer sleeve 9 is lower than that of the diversion pipe 8. A primary aeration zone is formed between the diversion pipe 8 and the outer sleeve 9, and a secondary aeration zone is formed between the outer sleeve 9 and the inner wall of the cylinder body 4. The drain pipe 11 is communicated with the secondary aeration zone.

[0057] The water after precipitation by multiple inverted umbrella-shaped sedimentation devices 5 overflows through the diversion pipe 8 and enters the primary aeration zone. Drop aeration is carried out through the primary aeration zone, and the water after drop aeration overflows into the secondary aeration zone for secondary aeration to further treat the water.

[0058] In order to better use activated sludge to treat water, a plurality of water flow cutting aeration and oxygen dissolution devices 10 are fixedly provided between the circumferential edge of the top of the outer sleeve 9 and the inner wall of the cylinder body 4 for carrying out water flow cutting oxygen dissolution and secondary aeration on the water after primary aeration.

[0059] As Figure 5 shown, the radial flow water distribution device 2 includes a vertical pipe 2-1 and a plurality of shunt water pipes 2-2. The plurality of shunt water pipes 2-2 are evenly arranged circumferentially on the vertical pipe 2-1, and the inner ends are respectively communicated with the vertical pipe 2-1, and the outer ends are inclined upward. A pipe joint 2-3 is provided at the lower part of the vertical pipe 2-1. The two adjacent vertical pipes 2-1 up and down are hermetically connected through the pipe joint 2-3. The radial flow water distribution device 2 located in the lower part of the cylinder body 4 is hermetically connected with the upper end of the water inlet pipe 1 through the pipe joint 2-3. The sealing plug 7 is arranged at the upper end of the upper vertical pipe 2-1.

[0060] The dirty water enters the vertical pipe 2-1 through the water inlet pipe 1, enters the plurality of water distribution pipes 2-2 through the vertical pipe 2-1, and enters the multi-layer inverted conical sedimentation space obliquely upward from the shunt water pipes 2-2 to precipitate sludge.

[0061] As Figure 2 shown, the sludge collection and guiding device 3 includes an outer ring plate 3-2, an inner ring plate 3-1 and a plurality of connecting rods 3-3 evenly and fixedly arranged between the outer ring plate 3-2 and the inner ring plate 3-1. A sludge guiding port is formed between the outer ring plate 3-2, the inner ring plate 3-1 and two adjacent connecting rods 3-3. The inner ring plate 3-1 is fixedly sleeved on the vertical pipe 2-1. The inner ring plate 3-1 is located above the plurality of shunt water pipes 2-2. The lower end of the inverted umbrella-shaped sedimentation device 5 is fixedly connected to the outer ring plate 3-2.

[0062] The precipitated sludge enters the outer ring plate 3-2 along the inverted umbrella-shaped sedimentation device 5, then enters the sludge guiding port, and falls into the bottom inside the cylinder body from the sludge guiding port. The sludge guiding ports of the multiple sludge collecting and guiding devices 3 correspond to each other, facilitating the direct fall of the sludge to the bottom inside the cylinder body.

[0063] As Figure 3 shown, the inverted umbrella-shaped sedimentation device 5 is an inverted cone body with openings at both the upper and lower ends. The upper opening of the inverted cone body is hermetically fixed on the inner wall of the cylinder body 4, and the lower opening of the inverted cone body is hermetically fixed on the outer ring plate 3-2.

[0064] The precipitated sludge slides down along the inverted cone body under the action of gravity to the outer ring plate 3-2. The inverted cone body facilitates the diversion of the precipitated sludge.

[0065] In order to facilitate the overflow of water in the lower inverted cone-shaped sedimentation space into the upper sedimentation space, a plurality of water permeable holes 6 are evenly arranged on the circumferential side surface of the inverted cone body near the upper opening. The water in the lower sedimentation space overflows into the upper sedimentation space through the plurality of water permeable holes 6 for continuous sedimentation, improving the sedimentation effect and efficiency.

[0066] In order to ensure the sedimentation effect, the distance between two adjacent inverted cone bodies above and below is 5 - 30 cm. The smaller the distance, the better the sedimentation effect.

[0067] In order to further improve the cleanliness of water treatment and reduce the turbidity of water, as Figure 4 shown, the water flow cutting aeration and oxygen dissolution device 10 includes a concave panel 10-1. One end of the concave panel 10-1 is fixed on the edge of the overflow port of the first-stage stepped aeration area 8, and the other end of the concave panel 10-1 is fixed on the inner side surface of the circumferential direction of the cylinder body 1. A plurality of slot seams 10-2 are arranged along the length direction inside the concave panel 10-1, and the concave panel 10-1 is arranged to be inclined from the inside to the outside.

[0068] By arranging a plurality of slot seams 10-2 to cut the water flow, the contact area between water and air is increased, and at the same time, more oxygen is dissolved, improving the water treatment effect.

[0069] The size of the cylinder body 4, the size of the inverted cone body, and the number of the water diversion pipes 2-2 are related to the water volume of water treatment.

[0070] As Figure 1As shown in the figure, when water flows into the middle water inlet pipe 1 and flows upward, it enters multiple radial flow water distribution devices 2 from bottom to top in sequence for homogeneous water distribution. The homogeneously distributed water flows into the multi-layer inverted umbrella-shaped sedimentation device 5 in layers, radiates into each sedimentation space around, and finally the clear water gathers and converges into the clear water area, that is, the upper part inside the cylinder body 4. The clear water overflows into the first-stage aeration area for first-stage aeration. The water after the first-stage aeration enters the second-stage aeration area through the water flow cutting aeration and oxygen dissolution device 10 for second-stage aeration. Finally, the water enters the subsequent filtration device from the drain pipe.

[0071] Sediment accumulation process: When water flows into the multi-layer inverted umbrella-shaped sedimentation device 5, the separation and settlement of particulate matters in the water are carried out. The settled particulate matters slide along the umbrella-shaped sedimentation plate from the surrounding to the sludge guiding device 3 in the middle under the action of gravity, and enter the sediment collection area at the bottom inside the cylinder body 4 to collect the sediment. After the sediment collection area is full of sediment, it is discharged outside the entire cylinder body 4 through the sludge discharge device.

[0072] Explanation of the working principle: The turbid water enters the cylinder body 1 from the lower part of the cylinder body 4 through the water inlet pipe 1 and extends upward along the axis or center of the cylinder body 1. The turbid water enters the multi-layer sedimentation space through multiple shunt water pipes 2-2 of the lower radial flow water distribution device 2. The particulate matters in the water settle along the inner side surface of the cone. Under the action of gravity, the particulate matters in the water slide down along the inner side surface of the cone to the sludge guiding port of the sludge guiding device 3, and then fall from the sludge guiding port into the bottom sediment collection area inside the cylinder body 1. The water in the multi-layer sedimentation space enters the upper space along the sludge guiding port and the water permeable holes 6, and continues to carry out particulate matter deposition. The water in the uppermost space enters the upper part inside the cylinder body 1 through the water permeable holes 6 and overflows from the pipe in the middle of the upper part of the cylinder body 1 into the first-stage aeration area for first-stage aeration. The water after the first-stage aeration overflows and enters the second-stage aeration through the water flow cutting aeration and oxygen dissolution device 10. At the same time, the water is cut through multiple slots 10-2 to dissolve more air and oxygen. The water after the second-stage aeration is discharged through the drain pipe 11 and enters the subsequent filtration equipment for filtration.

[0073] The particulate sediment falling into the bottom sediment collection area inside the cylinder body 4 is discharged outside the cylinder body 4 through the suction pump and the sludge discharge valve.

[0074] The invention has a small floor area, good sedimentation effect, high sedimentation efficiency, low effluent turbidity, good water cleanliness, can reduce the filtration pressure of the subsequent filtration device, and save water resources.

[0075] Taking surface water as the water source, the conventional water purification process of the waterworks is: raw water + reaction precipitation + filtration + disinfection. The reaction precipitation device of the conventional water purification process has a limit on the influent turbidity of the raw water. If the turbidity is too high, the sedimentation tank operates overloaded, the effluent effect is poor, the dosage of the flocculant is large, which increases the backwashing frequency of the subsequent filtration device and consumes a large amount of water resources and drugs. After adopting the hydraulic radiation stratified flow suspension multi-layer sedimentation device of the present invention, the change of the raw water turbidity has no influence on its sedimentation effluent effect, the effluent turbidity is stable, the subsequent filtration device operates smoothly, and the effluent quality is better than that of the conventional water purification treatment process.

[0076] The present invention adopts multi-layer inverted umbrella-shaped inclined plates, which can multiply the sedimentation area for the settlement of particulate matters in water, occupy a small area, improve the sedimentation effect, and increase the sedimentation water treatment capacity.

[0077] The present invention adopts a radiation flow water distribution method through multiple radiation flow water distribution devices, so that the influent diffuses and flows circumferentially, reduces the water flow velocity, and makes it difficult for impurities in the water to be carried away by the water flow.

[0078] The present invention combines multiple radiation flow water distribution devices, multiple inverted umbrella-shaped sedimentation devices and sludge collection guiding devices. Since the densities and sizes of the particulate matters contained in the raw water are different and their sedimentation velocities are also different, a vertical upward stratified flow method is adopted, which can effectively sediment the particulate matters step by step according to their density and size.

[0079] The present invention can replace the treatment capacity of the conventional sedimentation clarifier, expand the raw water turbidity range, and reduce the effluent water quality turbidity.

[0080] 1. Reduce the area of the existing sedimentation structure;

[0081] 2. Improve the sedimentation efficiency of the structure;

[0082] 3. Reduce the dosage of the flocculant in the sedimentation structure;

[0083] 4. Can relax the requirements for the raw water quality and expand the raw water quality turbidity range.

[0084] The above-disclosed are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A hydraulic stratified radiation flow multi-layer suspended sedimentation device, characterized in that, Comprising: A cylinder body (4), inside which are provided: A water inlet pipe (1), one end of which extends into the cylinder body (4) and extends upward along the cylinder body (4) for conveying the turbid water to be treated into the cylinder body (4); A plurality of inverted umbrella-shaped sedimentation devices (5), fixed inside the cylinder body (4), dividing the inside of the cylinder body (4) into multiple inverted conical sedimentation spaces, and the turbid water sedimentates sludge in the multiple inverted conical sedimentation spaces; A plurality of radial flow water distribution devices (2), used for radially distributing the turbid water in the multiple inverted conical sedimentation spaces, one radial flow water distribution device (2) is arranged in each inverted conical sedimentation space, the upper and lower adjacent two radial flow water distribution devices (2) are communicated in sequence, the lower radial flow water distribution device (2) is hermetically communicated with the water inlet pipe (1), and a sealing plug (7) is provided at the top of the upper radial flow water distribution device (2); A plurality of sludge collection guiding devices (3), one sludge collection guiding device (3) is arranged between each inverted umbrella-shaped sedimentation device (5) and the corresponding radial flow water distribution device (2), used for guiding the sludge in the inverted conical sedimentation space so that the sludge sinks to the bottom inside the cylinder body (4); A drain pipe (11), arranged at the upper part of the outer wall of the cylinder body (4), above the upper inverted umbrella-shaped sedimentation device (5), for discharging the water after sludge sedimentation; A sludge discharge device (12), located at the bottom inside the cylinder body (4), connected to a sludge discharge pipe, and the sludge discharge pipe extends outside the cylinder body (4), used for discharging the sludge sedimentated at the bottom inside the cylinder body (4); A partition plate (13) is provided at the upper part inside the cylinder body (4), the partition plate (13) is above the sealing plug (7), a diversion pipe (8) is fixedly provided in the middle of the partition plate, the diversion pipe (8) is communicated with the lower part of the partition plate (13) inside the cylinder body (4), an outer sleeve (9) is also provided on the partition plate (13) outside the diversion pipe (8), the height of the outer sleeve (9) is lower than that of the diversion pipe (8), a primary aeration zone is formed between the diversion pipe (8) and the outer sleeve (9), a secondary aeration zone is formed between the outer sleeve (9) and the inner wall of the cylinder body (4), and the drain pipe (11) is communicated with the secondary aeration zone; A plurality of water flow cutting aeration and oxygen dissolution devices (10) are fixedly provided between the circumferential edge of the top of the outer sleeve (9) and the inner wall of the cylinder body (4), used for carrying out water flow cutting oxygen dissolution and secondary aeration on the water after primary aeration; The radial flow water distribution device (2) includes a vertical pipe (2-1) and a plurality of shunt water pipes (2-2), the plurality of shunt water pipes (2-2) are evenly arranged in the circumferential direction of the vertical pipe (2-1), and the inner ends are respectively communicated with the vertical pipe (2-1), the outer ends are inclined upward, a pipe joint (2-3) is provided at the lower part of the vertical pipe (2-1), the upper and lower adjacent two vertical pipes (2-1) are hermetically connected through the pipe joint (2-3), the radial flow water distribution device (2) located at the lower part inside the cylinder body (4) is hermetically connected to the upper end of the water inlet pipe (1) through the pipe joint (2-3), and the sealing plug (7) is arranged at the upper end of the upper vertical pipe (2-1).

2. The hydraulic stratified radiation flow multi-layer suspended sedimentation device according to claim 1, characterized in that, The sludge collecting and guiding device (3) includes an outer ring plate (3-2), an inner ring plate (3-1), and a plurality of connecting rods (3-3) uniformly and fixedly arranged between the outer ring plate (3-2) and the inner ring plate (3-1). A sludge guiding port is formed between the outer ring plate (3-2), the inner ring plate (3-1), and two adjacent connecting rods (3-3). The inner ring plate (3-1) is fixedly sleeved on the vertical pipe (2-1), and the inner ring plate (3-1) is located above a plurality of water diversion pipes (2-2). The lower end of the inverted umbrella-shaped sedimentation device (5) is fixedly connected to the outer ring plate (3-2).

3. The hydraulic stratified radiation flow multi-layer suspended sedimentation device according to claim 2, characterized in that, The inverted umbrella-shaped sedimentation device (5) is an inverted cone body with openings at both the upper and lower ends. The upper opening of the inverted cone body is hermetically fixed to the inner wall of the cylinder body (4), and the lower opening of the inverted cone body is hermetically fixed to the outer ring plate (3-2).

4. The hydraulic stratified radiation flow multi-layer suspended sedimentation device according to claim 3, characterized in that, A plurality of water permeable holes (6) are uniformly arranged on the circumferential side surface of the inverted cone body near the upper opening.

5. The hydraulic stratified radiation flow multi-layer suspended sedimentation device according to claim 3, characterized in that, The distance between two adjacent inverted cone bodies up and down is 5 - 30 cm.

6. The hydraulic stratified radiation flow multi-layer suspended sedimentation device according to claim 1, characterized in that, The water flow cutting aeration and oxygenation device (10) includes a concave panel (10-1). One end of the concave panel (10-1) is fixed to the edge of the overflow port in the primary aeration zone, and the other end of the concave panel (10-1) is fixed to the inner side surface of the circumferential direction of the cylinder body (4). A plurality of slot seams (10-2) are arranged along the length direction inside the concave panel (10-1), and the concave panel (10-1) is inclined from the inside to the outside.

7. A sedimentation method for the hydraulic stratified radiation flow multi-layer suspended sedimentation device according to claim 1, characterized in that, It includes the following steps: S1. The turbid water enters the cylinder body (4) through the water inlet pipe (1). S2. The turbid water flows out from the water inlet pipe (1) and enters the radial flow water distribution device (2), and then radially enters the sedimentation space in a circumferential direction, and the flow rate of the water decreases. S3. The water precipitates sludge in the sedimentation space, and the sludge enters the sludge collecting and guiding device (3) along the inverted umbrella-shaped sedimentation device (5). S4. After passing through the sludge collecting and guiding device (3), the sludge falls to the bottom inside the cylinder body (4). S5. The water after precipitating sludge overflows upward along the sludge collecting and guiding device (3) and enters the primary aeration zone for primary aeration. S6. The water after primary aeration enters the secondary aeration zone for secondary aeration. In order to better use activated sludge to treat water, a plurality of water flow cutting aeration and oxygenation devices (10) are fixedly arranged between the circumferential edge of the top of the outer sleeve (9) and the inner wall of the cylinder body (4) for water flow cutting oxygenation and secondary aeration of the water after primary aeration. S7. The water after secondary aeration is discharged through the drain pipe (11). S8. The sludge deposited at the bottom of the cylinder body (4) is discharged out of the cylinder body (4) through the sludge discharging device (12) and the sludge discharging pipe.

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