A high efficiency sedimentation tank apparatus

Abstract

The utility model discloses a kind of efficient sedimentation tank equipment, belong to sewage treatment equipment technical field.The sedimentation tank includes the pretreatment area and the sedimentation area that are sequentially connected, the upper portion of sedimentation area is equipped with water inlet flow guide subarea, and lower portion is equipped with sludge settling subarea, pretreatment area is communicated with the top of water inlet flow guide subarea, water flow enters sludge settling subarea through water inlet flow guide subarea;Water inlet flow guide subarea is equipped with at least two columns of staggered inclined arrangement steady flow plate inside, and the inclined direction of two adjacent steady flow plates is opposite;The bottom end of two columns of steady flow plates located at edge is close to the setting of opposite two side walls of water inlet flow guide subarea, and there is gap between corresponding side wall, and the gap is for sediment to pass through.The scheme is optimized to steady flow plate, which is conducive to steady flow plate to reduce the potential energy of sewage flowing through water inlet flow guide subarea;Meanwhile, also effectively reduce the accumulation of sediment at the bottom end of steady flow plate.Further, reflux pump equipment area does not need additional space, and shortens the path of sludge reflux.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment equipment technology, and more specifically, to a high-efficiency sedimentation tank device. Background Technology

[0002] Sludge settling tanks are typically divided into multiple functional zones, including a mixing reaction zone, a flocculation reaction zone, and a sedimentation zone. This zoned design allows the processes of coagulation, flocculation, and sedimentation to proceed efficiently within their respective independent areas.

[0003] During the process of existing sewage flowing from the flocculation zone to the sedimentation zone, the mixed liquid that just enters the sedimentation tank has a certain potential energy and its flow velocity is relatively fast. Generally, by setting up turbulence plates (also known as energy dissipation plates), the potential energy of this part of the mixed liquid is reduced so that it can enter the sedimentation zone evenly and gently.

[0004] For example, Chinese Patent Application No. CN210751432U discloses a sludge-water separation device for sewage treatment. The device specifically includes: a sedimentation tank body, an inlet pipe, an inlet bar screen box, a perforated water distribution pipe, an inlet baffle, a water distribution energy dissipation plate, an intermediate baffle, an outlet guide plate, a sludge blocking plate, an outlet water distribution weir, an outlet pipe, a vent pipe, a scum skimming device, a sludge discharge solenoid valve, a sludge collection hopper, a sludge discharge solenoid valve, a sludge air lift return device, and a sludge return pipe. The first section of the sedimentation tank body is the area between the outer wall of the sedimentation tank inlet end and the inlet baffle. The water distribution angle of the water distribution energy dissipation plate is 45°~60°. The energy dissipation effect of the water distribution energy dissipation plate in this application needs to be further improved.

[0005] For example, Chinese Patent Application No. CN119707110A discloses a water treatment tank and an integrated wastewater treatment device for nitrogen and phosphorus removal coupled with a mud-film coupling system. This wastewater treatment device includes, sequentially connected along the water flow direction, a deoxygenation and denitrification mud-film tank, a pure anaerobic phosphorus-releasing mud-film tank, an anoxic denitrification mud-film tank, an aerobic carbon removal and phosphorus absorption mud-film tank, an aerobic nitrification mud-film tank, a sedimentation tank, and an air-washing regeneration filter tank. An aerodynamic mixing and flocculation zone is located after the nitrification liquid return zone. A flocculation pre-sedimentation zone is located between the aerodynamic mixing and flocculation zone and the sedimentation tank. The effluent from the aerodynamic mixing and flocculation zone first passes through the flocculation pre-sedimentation zone before flowing into the sedimentation tank. Baffles are provided on the sides of the flocculation pre-sedimentation zone, with interlaced inclined plates and water-passing strip holes on the inclined plates. While the energy dissipation effect of the baffles in this application is improved, sludge accumulation easily forms at the bottom of the baffles and adjacent sidewalls. Utility Model Content

[0006] 1. Technical problems to be solved To address the technical problem of sludge accumulation between the bottom and sidewalls of flow stabilizers in existing sedimentation tanks due to improper arrangement, this invention provides a high-efficiency sedimentation tank device. This solution, through optimized design of the flow stabilizer, not only reduces the potential energy of wastewater flowing through the inlet guide zone but also effectively reduces sediment accumulation at the bottom of the flow stabilizer, contributing to its long-term stable operation.

[0007] 2. Technical solutions adopted To achieve the above objectives, the technical solution provided by this utility model is as follows: This utility model discloses a high-efficiency sedimentation tank device, which includes a pretreatment zone and a sedimentation zone connected in sequence. The sedimentation zone has an inlet guide zone at the top and a sludge settling zone at the bottom. The top of the pretreatment zone is connected to the inlet guide zone, and water flows through the inlet guide zone into the sludge settling zone. The inlet guide zone has at least two rows of staggered inclined flow stabilizers inside, and the inclination directions of adjacent rows of flow stabilizers are opposite. The bottom ends of the two rows of flow stabilizers located at the edge are set close to the opposite side walls of the inlet guide zone, and there is a gap between them and the corresponding side walls, which is used for sediment to pass through.

[0008] Furthermore, a single flow stabilizer extends along the width of the sedimentation tank, and adjacent rows of flow stabilizers are spaced apart along the length of the sedimentation tank.

[0009] Furthermore, the two side walls of the flow stabilizer plate extend and are fixedly installed on the other two opposite side walls of the water inlet guide zone.

[0010] Furthermore, the number of flow stabilizers is two rows, and the two rows of flow stabilizers are staggered with the vertical axis of the water inlet guide zone as the center of symmetry, and the inclination angle θ with the vertical direction is 30°~60°.

[0011] Furthermore, the sedimentation zone is equipped with a first baffle, which includes a first vertical section, a second inclined section, and a third vertical section arranged from top to bottom. The first vertical section, the second inclined section, and the third vertical section, together with the adjacent sidewalls in the pretreatment zone, respectively form an energy dissipation layer, a gradient layer, and a flow guiding layer in the influent flow guiding zone. A flow stabilizing plate is arranged inside the energy dissipation layer. The diameter of the gradient layer gradually increases from top to bottom. An inclined tube sedimentation zone is arranged on the side of the gradient layer away from the pretreatment zone. The flow guiding layer extends below the inclined tube sedimentation zone to guide sewage into the sludge sedimentation zone.

[0012] Furthermore, the sedimentation zone also includes an effluent regulation zone and a main collection channel located above the inclined tube sedimentation zone. The inlet diversion zone, the effluent regulation zone, and the main collection channel are arranged sequentially along the line connecting the pretreatment zone and the sedimentation zone. The effluent regulation zone includes multiple branch channels distributed at intervals, and a second inlet weir with adjustable height is provided on the top of the side wall of each branch channel.

[0013] Furthermore, each of the branch channels extends along the line connecting the pretreatment zone and the sedimentation zone, and a second inlet weir is provided on the adjacent sidewall of the multiple branch channels.

[0014] Furthermore, the pretreatment zone has a double-layer structure, including an upper coagulation zone and a flocculation zone, and a lower return pump equipment zone. The coagulation zone and the flocculation zone are arranged side by side, and the bottom of the return pump equipment zone is flush with the bottom of the sedimentation zone. The return pump equipment zone is equipped with a sludge return pump, and the two ends of the sludge return pump are respectively equipped with a sludge suction pipe extending to the bottom of the sedimentation zone and a sludge return pipe extending to the bottom of the flocculation zone, for returning the sludge from the sedimentation zone to the flocculation zone.

[0015] Furthermore, the coagulation zone includes a coagulation dosing zone and a coagulation mixing zone. The top of the coagulation mixing zone near the side wall of the coagulation dosing zone is provided with a height-adjustable first inlet weir. The coagulation dosing zone and the coagulation mixing zone are connected through the top of the first inlet weir.

[0016] Furthermore, the coagulation dosing zone and the coagulation mixing zone are sequentially connected along the line connecting the pretreatment zone and the sedimentation zone.

[0017] Compared with the prior art, the technical solution provided by this utility model has the following advantages: (1) This utility model optimizes the design of the flow stabilizer plate in the sedimentation tank equipment. Specifically, at least two rows of staggered and inclined flow stabilizers are provided inside the inlet guide zone. The bottom ends of the two rows of flow stabilizers located at the edge are respectively close to the opposite side walls of the inlet guide zone, and there is a gap between them and the corresponding side walls. This arrangement not only ensures a good energy dissipation effect, but also effectively prevents the sediment in the sewage from forming sludge accumulation between the bottom end of the flow stabilizer plate and its adjacent side wall, thus contributing to the long-term stable operation of the flow stabilizer plate.

[0018] (2) This utility model further optimizes the design of the effluent regulation zone. Specifically, the effluent regulation zone includes multiple channels distributed at intervals. Each channel has a second inlet weir with adjustable height on its side wall. On the one hand, this can adjust the relative height of the effluent outlet position of each channel, thereby reducing the adverse effects caused by the height difference at the bottom of the sedimentation zone. On the other hand, it can further reduce the degree of difference in effluent flow rate per unit time of each channel. At the same time, it adjusts the time difference of sewage flowing to different areas of the sedimentation tank.

[0019] (3) The present invention further optimizes the layout of the pretreatment zone. Specifically, the pretreatment zone is a double-layer structure, with the coagulation zone and the flocculation zone arranged side by side, and the return pump equipment zone located in the lower layer. This saves the extra space required for the return pump equipment zone and shortens the sludge return path; at the same time, it improves the space utilization rate of the sedimentation tank equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal structure of the high-efficiency sedimentation tank equipment according to an embodiment of this utility model.

[0021] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle.

[0022] Figure 3 This is a top view of the high-efficiency sedimentation tank equipment according to an embodiment of the present invention.

[0023] Figure 4 This is a side view of the internal structure of the high-efficiency sedimentation tank equipment according to an embodiment of the present invention.

[0024] Explanation of icon numbers: 100. Coagulation zone; 110. Coagulation dosing zone; 120. Coagulation mixing zone; 101. Sedimentation tank inlet; 102. First inlet weir; 103. First mixer; 104. Dosing pipe; 200. Flocculation Zone; 210. Flocculation Mixing Zone 1; 220. Flocculation Zone 2; 201. Second Mixer; 202. Guide Flow Tube; 300. Sedimentation Zone; 310. Inlet Flow Diversion Zone; 320. Sludge Settling Zone; 330. Inclined Tube Settling Zone; 340. Water Level Regulation Zone; 350. Main Collection Channel; 301. First Baffle Plate; 302. Flow Stabilizer Plate; 303. Sludge Interface Meter; 304. Second Inlet Weir; 305. Sludge Scraper; 306. Sedimentation Tank Outlet; 307. Sludge Discharge Outlet; 400. Return pump equipment area; 401. Sludge return pipe; 402. Sludge return pump; 403. Suction pipe; 404. Door panel. Detailed Implementation

[0025] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0026] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0027] Regarding the orientation, in this wastewater sedimentation equipment, the pretreatment zone and sedimentation zone 300 are sequentially connected. The direction of the line connecting the pretreatment zone and sedimentation zone 300 is called the length direction of the wastewater sedimentation equipment, and the horizontal direction perpendicular to this direction is called the width direction of the wastewater sedimentation equipment. Generally, the length dimension of the wastewater sedimentation equipment is larger than its width dimension. In the following embodiments, the length direction or width direction refers to the orientation of the wastewater sedimentation equipment.

[0028] This embodiment provides a high-efficiency sedimentation tank device, referencing... Figure 1 , Figure 2 As shown, the sedimentation tank includes a pretreatment zone and a sedimentation zone 300, which are sequentially connected. The sedimentation zone 300 has an inlet flow guide zone 310 at its upper part and a sludge settling zone 320 at its lower part. The top of the pretreatment zone is connected to the inlet flow guide zone 310, and water flows through the inlet flow guide zone 310 into the sludge settling zone 320. The inlet flow guide zone 310 has at least two rows of staggered inclined flow stabilizers 302 inside, and the inclination directions of adjacent rows of flow stabilizers 302 are opposite. The bottom ends of the two rows of flow stabilizers 302 located at the edge are respectively close to the opposite side walls of the inlet flow guide zone 310, and there is a gap between them and the corresponding side walls. This gap is used for sediment to pass through.

[0029] In wastewater sedimentation equipment, the interior of the sedimentation tank is generally divided into a pretreatment zone and a sedimentation zone 300 by setting up a partition. The top of the adjacent side walls of the two zones forms the outlet of the pretreatment zone, which is the inlet of the inlet diversion zone 310. Wastewater is pretreated in the pretreatment zone and then enters the sedimentation zone 300. The pretreatment generally includes coagulation treatment and flocculation treatment.

[0030] In this application, the flow stabilizer 302 is inclined and its bottom end is close to the opposite side wall of the inlet guide section 310. Therefore, the tops of the two rows of flow stabilizers 302 located at the edge are inclined upwards towards the interior of the inlet guide section 310. This arrangement provides better energy dissipation compared to the existing downward-inclined arrangement. Furthermore, in this application, there is a gap between the bottom end of the flow stabilizer 302 and the corresponding side wall. This gap allows sediment to pass through, effectively preventing sludge accumulation between the bottom end of the flow stabilizer 302 and its adjacent side wall, thus contributing to the long-term stable operation of the flow stabilizer 302.

[0031] The size of this gap is generally set between 5 and 15 mm, just large enough to allow large sludge flocs to pass through. The gap should not be too large to reduce the flow rate of wastewater directly flowing down to the sludge settling zone 320.

[0032] Specifically, a single flow stabilizer plate 302 extends along the width of the sedimentation tank, and two adjacent rows of flow stabilizers 302 are spaced apart along the length of the sedimentation tank.

[0033] It should be noted that the adjacent columns of flow stabilizers 302 are spaced apart along the length direction. The adjacent ends of the adjacent columns of flow stabilizers 302 may partially overlap, be flush, or not overlap in the top view projection. The flow stabilization effect is better when the adjacent ends partially overlap or are flush.

[0034] As a preferred embodiment of the installation of the flow stabilizer plate 302, the two side walls of the flow stabilizer plate 302 extend along the width direction of the sedimentation tank and are fixedly installed on the other two opposite side walls of the water inlet guide zone 310.

[0035] More specifically, the number of flow stabilizers 302 is two rows, and the two rows of flow stabilizers 302 are staggered with the vertical axis of the water inlet guide zone 310 as the center of symmetry, and the inclination angle θ with the vertical direction is 30°~60°. More preferably, the inclination angle θ of the two rows of flow stabilizers 302 with the vertical direction is 45°.

[0036] As a further preferred embodiment of any of the above embodiments, a first partition 301 is provided inside the sedimentation zone 300. The first partition 301 and the adjacent sidewalls in the pretreatment zone form an inlet flow guiding zone 310. The first partition 301 includes a first vertical section, a second inclined section and a third vertical section arranged from top to bottom. The first vertical section, the second inclined section and the third vertical section and the adjacent sidewalls in the pretreatment zone respectively form an energy dissipation layer, a gradient layer and a flow guiding layer in the inlet flow guiding zone 310. A flow stabilizing plate 302 is provided inside the energy dissipation layer. The diameter of the gradient layer gradually increases from top to bottom. An inclined tube sedimentation zone 330 is provided on the side of the gradient layer away from the pretreatment zone. The flow guiding layer extends below the inclined tube sedimentation zone 330 to guide sewage into the sludge sedimentation zone 320 through the flow guiding layer.

[0037] The guide layer is used to guide sewage into the sludge settling zone 320, preventing sewage from directly entering the inclined tube settling zone 330 from the transition layer, thereby further extending the sewage settling path. More preferably, the top of the sludge tank 300 is equipped with a sludge interface meter 303. Based on the data obtained from the sludge interface meter 303, the frequency of sludge return is adjusted to maintain the balance of sludge concentration within the sludge settling zone 320.

[0038] As an extension, the sedimentation zone 300 also includes an effluent regulation zone 340 and a main collection channel 350 located above the inclined tube sedimentation zone 330. The inlet diversion zone 310, the effluent regulation zone 340 and the main collection channel 350 are arranged sequentially along the line connecting the pretreatment zone and the sedimentation zone 300. The effluent regulation zone 340 includes multiple branch channels distributed at intervals, and a second inlet weir 304 with adjustable height is provided on the side wall of each branch channel.

[0039] Generally, due to construction errors, especially for concrete tanks, the bottom or bottom support surface of the sedimentation zone 300 may have a height difference. By setting up a height-adjustable second inlet weir 304, the relative height of the outlet positions of each branch channel can be adjusted, thereby reducing the adverse effects caused by the height difference at the bottom of the sedimentation zone 300. More importantly, because the inflow direction and angle of multiple water streams in the sewage flowing from the pretreatment zone to the sedimentation zone 300 differ, the flow rate of each branch channel flowing to the main collection channel 350 per unit time varies. By setting up the second inlet weir 304, the degree of difference in the outflow rate of each branch channel per unit time can be further reduced. At the same time, it regulates the time difference of sewage flowing to different areas of the sedimentation tank.

[0040] As a further extension, a single branch channel extends along the line connecting the pretreatment zone and the sedimentation zone 300, and a second inlet weir 304 is set on the adjacent sidewalls of multiple branch channels.

[0041] Preferably, a sedimentation tank outlet 306 is provided on the side wall of the main water collection channel 350, away from the water outlet regulating zone 340.

[0042] As a preferred embodiment of the preprocessing area, refer to Figure 3 , Figure 4 As shown, the pretreatment zone has a double-layer structure, which includes a coagulation zone 100 and a flocculation zone 200 in the upper layer and a return pump equipment zone 400 in the lower layer. The coagulation zone 100 and the flocculation zone 200 are arranged side by side along the width direction. The bottom end of the return pump equipment zone 400 is flush with the bottom end of the sedimentation zone 300. The return pump equipment zone 400 is equipped with a sludge return pump 402. The two ends of the sludge return pump 402 are respectively provided with a sludge suction pipe 403 extending to the bottom of the sedimentation zone 300 and a sludge return pipe 401 extending to the bottom of the flocculation zone 200, which are used to return the sludge in the sedimentation zone 300 to the flocculation zone 200.

[0043] Generally, in existing wastewater sedimentation equipment, due to the need for mixers inside the coagulation zone 100 and flocculation zone 200, and for maintenance purposes, there are minimum size requirements for the length and width of the coagulation zone 100 and flocculation zone 200. Typically, their width is designed according to the minimum size, while their length and height are redundant, especially for the coagulation zone 100 and flocculation zone 200 which are designed with the same height as the sedimentation zone 300, resulting in excessive space occupation. Simultaneously, the existing return pump equipment area 400 is located outside the sedimentation tank, extending the sludge return path. By arranging the coagulation zone 100 and flocculation zone 200 side-by-side along the width direction, the pretreatment zone and sedimentation zone 300 side-by-side along the length direction, and placing the return pump equipment area 400 directly below the coagulation zone 100 and flocculation zone 200, not only is the extra space required for the return pump equipment area 400 saved, but the sludge return path is also shortened; furthermore, the space utilization rate of the wastewater sedimentation equipment is improved. The side wall of the reflux pump equipment area 400 is provided with a door opening, and the door panel 404 is hinged to be installed in the door opening for entering and exiting the reflux pump equipment area 400.

[0044] Specifically, the bottom of the sludge settling zone 320 is equipped with a sludge hopper and a scraper 305 extending from the top of the settling zone 300 into the sludge hopper. One end of the suction pipe 403 extends into the sludge hopper to suck up the wastewater in the sludge hopper, which is then returned to the bottom of the flocculation zone 200 via the sludge return pump 402. A sludge discharge port 307 is provided on one side of the sludge hopper for discharging the sludge from the hopper.

[0045] More specifically, the sludge suction pipe 401 is preferably set horizontally, and the sludge return pipe 401 is preferably set vertically, thereby further shortening the sludge return path.

[0046] Preferably, the bottom ends of the coagulation zone 100 and the flocculation zone 200 are flush, and the width of the coagulation zone 100 is smaller than the width of the flocculation zone 200.

[0047] In some implementations, the coagulation zone 100 includes a coagulation dosing zone 110 and a coagulation mixing zone 120. The top of the coagulation mixing zone 120 near the side wall of the coagulation dosing zone 110 is provided with a height-adjustable first inlet weir 102. The coagulation dosing zone 110 and the coagulation mixing zone 120 are connected through the top of the first inlet weir 102.

[0048] The coagulation zone 100 is divided into a coagulation dosing zone 110 and a coagulation mixing zone 120 by a partition. A first inlet weir 102 is located on the top of the partition. That is, the coagulation mixing zone 120 has a height-adjustable first inlet weir 102 on the top of the side wall near the coagulation dosing zone 110. The dosing pipe 104 is connected to the coagulation dosing zone 110 and is used to add coagulant to it. The coagulation mixing zone 120 is equipped with a first mixer 103. The first mixer 103 is used to promote the mixing of sewage with coagulant in the coagulation dosing zone 110 and then flow into the coagulation mixing zone 120 from the top of the first inlet weir 102, which fully prolongs the coagulation time and thus improves the mixing efficiency of the coagulant.

[0049] Preferably, the coagulation dosing zone 110 and the coagulation mixing zone 120 are sequentially connected along the line connecting the pretreatment zone and the sedimentation zone 300. The side wall of the coagulation dosing zone 110 away from the coagulation mixing zone 120 is provided with a sedimentation tank inlet 101. Wastewater enters the coagulation dosing zone 110 from the sedimentation tank inlet 101, and then enters the flocculation zone 200 through the coagulation mixing zone 120.

[0050] In some other embodiments, the flocculation zone 200 includes a guide tube 202 and a second mixer 201 located inside the guide tube 202. The interior of the guide tube 202 forms a flocculation mixing zone 210, and the exterior of the guide tube 202 and the sidewall of the flocculation zone 200 form a flocculation zone 220. The inlet in the guide tube 202 is located at its lower part and is connected to the coagulation zone 100. The wastewater flows from the coagulation zone 100 at a 90° angle and then enters the interior of the guide tube 202, and then enters the flocculation zone 220 from the top of the guide tube 202. That is, the wastewater flows through the flocculation mixing zone 210 and the flocculation zone 220 in sequence.

[0051] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-efficiency sedimentation tank device, the sedimentation tank comprising a pretreatment zone and a sedimentation zone (300) sequentially connected, characterized in that, The sedimentation zone (300) is provided with an inlet water diversion zone (310) at the top and a sludge settling zone (320) at the bottom. The pretreatment zone is connected to the top of the inlet water diversion zone (310), and the water flows through the water diversion zone (310) into the sludge settling zone (320). The interior of the water inlet guide zone (310) is provided with at least two rows of staggered inclined flow stabilizers (302), and the inclination directions of the two adjacent rows of flow stabilizers (302) are opposite; the bottom ends of the two rows of flow stabilizers (302) located at the edge are set close to the opposite side walls of the water inlet guide zone (310), and there is a gap between them and the corresponding side walls, which is used for sediment to pass through.

2. The high-efficiency sedimentation tank equipment according to claim 1, characterized in that, A single flow stabilizer plate (302) extends along the width of the sedimentation tank, and two adjacent rows of flow stabilizers (302) are spaced apart along the length of the sedimentation tank.

3. The high-efficiency sedimentation tank equipment according to claim 2, characterized in that, The two side walls of the flow stabilizer (302) extend and are fixedly installed on the other two opposite side walls of the water inlet guide zone (310).

4. The high-efficiency sedimentation tank equipment according to claim 3, characterized in that, The number of flow stabilizers (302) is two rows. The two rows of flow stabilizers (302) are arranged alternately with the vertical axis of the water inlet guide zone (310) as the center of symmetry, and the inclination angle θ with the vertical direction is 30°~60°.

5. The high-efficiency sedimentation tank equipment according to any one of claims 1-4, characterized in that, The sedimentation zone (300) is provided with a first partition (301). The first partition (301) includes a first vertical section, a second inclined section and a third vertical section arranged from top to bottom. The first vertical section, the second inclined section and the third vertical section respectively form an energy dissipation layer, a gradient layer and a flow guiding layer in the water inlet guiding zone (310) between the adjacent sidewalls in the pretreatment zone. The flow stabilizer (302) is located inside the energy dissipation layer. The diameter of the gradient layer gradually increases from top to bottom. An inclined tube settling zone (330) is provided on the side of the gradient layer away from the pretreatment zone. The flow guide layer extends below the inclined tube settling zone (330) to guide sewage into the sludge settling zone (320).

6. The high-efficiency sedimentation tank equipment according to claim 5, characterized in that, The sedimentation zone (300) also includes an effluent regulation zone (340) and a main collection channel (350) located above the inclined tube sedimentation zone (330). The inlet diversion zone (310), the effluent regulation zone (340) and the main collection channel (350) are arranged sequentially along the line connecting the pretreatment zone and the sedimentation zone (300). The effluent regulation zone (340) includes multiple branch channels distributed at intervals. A second inlet weir (304) with adjustable height is provided on the top of the side wall of each branch channel.

7. The high-efficiency sedimentation tank equipment according to claim 6, characterized in that, Each of the branch channels extends along the line connecting the pretreatment zone and the sedimentation zone (300), and a second inlet weir (304) is provided on the adjacent sidewall of the multiple branch channels.

8. The high-efficiency sedimentation tank equipment according to any one of claims 1-4, characterized in that, The pretreatment zone has a double-layer structure, which includes a coagulation zone (100) and a flocculation zone (200) located in the upper layer and a return pump equipment zone (400) located in the lower layer. The coagulation zone (100) and the flocculation zone (200) are arranged side by side, and the bottom end of the return pump equipment zone (400) is flush with the bottom end of the sedimentation zone (300). The sludge return pump equipment area (400) is equipped with a sludge return pump (402). The two ends of the sludge return pump (402) are respectively provided with a sludge suction pipe (403) extending to the bottom of the sedimentation zone (300) and a sludge return pipe (401) extending to the bottom of the flocculation zone (200), which are used to return the sludge in the sedimentation zone (300) to the flocculation zone (200).

9. The high-efficiency sedimentation tank equipment according to claim 8, characterized in that, The coagulation zone (100) includes a coagulation dosing zone (110) and a coagulation mixing zone (120). The top of the coagulation mixing zone (120) near the side wall of the coagulation dosing zone (110) is provided with a height-adjustable first inlet weir (102). The coagulation dosing zone (110) and the coagulation mixing zone (120) are connected through the top of the first inlet weir (102).

10. The high-efficiency sedimentation tank equipment according to claim 9, characterized in that, The coagulation dosing zone (110) and the coagulation mixing zone (120) are sequentially connected along the line connecting the pretreatment zone and the sedimentation zone (300).

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