A radial flow sedimentation basin

Abstract

The utility model relates to a kind of radial flow sedimentation tanks, including pool body, mud scraping mechanism and cleaning mechanism, the pool body has sedimentation zone, inlet channel and outlet channel, the inlet channel and outlet channel are respectively around the sedimentation zone setting, the inlet channel is located the outside of the outlet channel;Multiple water distribution holes are annularly set in the circumferential direction of the inlet channel, the inlet channel is communicated with the sedimentation zone by the water distribution hole;The sedimentation zone is also communicated with the outlet channel;The center of the sedimentation zone is provided with center column, one end of the center column is fixed to the bottom of the sedimentation zone, and the other end extends upward relative to the bottom of the sedimentation zone;The mud scraping mechanism and cleaning mechanism are respectively arranged at the bottom and top of the pool body, the cleaning mechanism can rotate around the center column, the rotation path of the cleaning mechanism can cover at least the water surface area between the sedimentation zone and the outlet channel, and the cleaning mechanism is used to clean the dregs of the water surface area.

Description

Technical Field

[0001] This utility model relates to the field of sedimentation tank technology, specifically to a radial flow sedimentation tank. Background Technology

[0002] Radial flow sedimentation tanks are large, mostly circular, sedimentation tanks. They are named for the fan-shaped flow of water radiating outwards from the center during operation, thus separating solid particles (sludge) from liquid (water). As a very common and crucial structure in waterworks and municipal wastewater treatment plants, they play a central role, especially in the secondary sedimentation tank stage.

[0003] Because this wastewater is rich in phosphorus and nitrogen, and sedimentation tanks are generally outdoors, algae floating on the surface proliferate under direct sunlight, requiring regular manual removal of floating debris. However, sedimentation tanks are typically large and deep, making it inconvenient for cleaners to constantly move around the edges or stand on the tank's support structure to retrieve debris. There is also a risk of falling into the sedimentation tank.

[0004] Therefore, it is necessary to improve upon existing technologies and provide a radial flow sedimentation tank with an automatic function to clean floating objects on the surface of the sedimentation tank. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a radial flow sedimentation tank with an automatic function for cleaning floating scum on the water surface.

[0006] To solve the above-mentioned technical problems, the technical solution used in this utility model is: a radial flow sedimentation tank, including a tank body, a sludge scraping mechanism, and a cleaning mechanism. The tank body has a sedimentation zone, an inlet channel, and an outlet channel. The inlet channel and the outlet channel are respectively arranged around the sedimentation zone, with the inlet channel located outside the outlet channel. The inlet channel is provided with multiple water distribution holes along its circumferential direction, and the inlet channel is connected to the sedimentation zone through the water distribution holes. The sedimentation zone is also connected to the outlet channel.

[0007] A central column is provided at the center of the sedimentation zone. One end of the central column is fixed to the bottom of the sedimentation zone, and the other end extends upward relative to the bottom of the sedimentation zone.

[0008] The sludge scraping mechanism and the cleaning mechanism are respectively located at the bottom and top of the pool. The cleaning mechanism can rotate around the central column. The rotation path of the cleaning mechanism can at least cover the water surface area between the sedimentation zone and the outlet channel. The cleaning mechanism is used to clean the scum on the water surface area.

[0009] Preferably, the cleaning mechanism includes a drive and a baffle connected to each other. The drive is fixed to the top of the central column, one end of the baffle is rotatably connected to the central column, and the other end extends outward relative to the central column. The drive can drive the baffle to rotate around the central column.

[0010] Preferably, the sludge scraping mechanism includes a scraper blade and a drive motor. The drive motor is fixed to the top of the central column, and the scraper blade is rotatably connected to the bottom of the central column. The drive motor can drive the scraper blade to rotate around the central column. The cleaning mechanism includes a baffle plate, which is fixed to the scraper blade. When the drive motor drives the scraper blade to rotate, it can simultaneously drive the baffle plate to rotate around the central column.

[0011] Preferably, the baffle has an interception part and a slag collection part connected together. The interception part extends radially along the pool body, and the slag collection part is located near the outlet channel. The first end of the slag collection part is connected to the interception part, and the second end extends circumferentially along the pool body and extends from the second end toward the outlet channel to form a slag collection trough. A slag discharge well is provided in the sedimentation zone. The opening of the slag collection trough faces the slag discharge well, and a scum discharge pipe is connected to the bottom of the slag discharge well. When the baffle rotates, the scum in the slag collection trough can be discharged into the scum discharge pipe through the slag discharge well.

[0012] Preferably, the wellhead of the slag discharge well is provided with multiple spacers at intervals, and a slag discharge port is formed between two adjacent spacers.

[0013] Preferably, the cleaning mechanism further includes a skirt board, which is fixed to one end of the baffle near the water outlet channel, and the bottom of the skirt board is divided into multiple brush strips.

[0014] Preferably, the skirt is made of rubber.

[0015] Preferably, the height of the central column is greater than the depth of the sedimentation zone.

[0016] Preferably, the sludge scraping mechanism includes a scraper, a drive motor, and a suction pipe. The drive motor is fixed to the top of the central column, and the scraper and suction pipe are rotatably connected to the bottom sides of the central column, respectively. The drive motor can drive the scraper and suction pipe to rotate. The suction pipe has multiple spaced suction holes along its length, and the suction holes penetrate the suction pipe radially. A sludge discharge pipe is also provided at the bottom of the sedimentation zone, and at least part of the discharge pipe extends out of the tank body. The suction pipe is connected to the discharge pipe.

[0017] Preferably, the wall of the outlet channel is provided with a plurality of flow equalization elements; a drainage channel is formed between two adjacent flow equalization elements; a drainage well is provided on one side of the pool, and a drainage pipe is provided at the bottom of the drainage well; the drainage channel, the drainage well and the drainage pipe are connected in sequence.

[0018] The beneficial effects of this utility model are mainly reflected in the following: By setting a cleaning mechanism in the sedimentation tank, the baffle of the cleaning mechanism can rotate together with the scraper blade of the sludge scraper. This allows the sludge scraper at the bottom of the sedimentation zone to simultaneously scrape sludge, while the baffle of the top cleaning mechanism intercepts, collects, and sweeps floating debris (algae, etc.) from the water surface and discharges it into the slag discharge well. This avoids the dangers of manual operation, and as long as the scraper blade is running, the baffle remains in a rotating state, resulting in better cleaning performance. Attached Figure Description

[0019] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0020] Figure 1 This is a top view structural diagram of the sedimentation tank in this utility model;

[0021] Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle;

[0022] Figure 3 This is a cross-sectional view of the sedimentation tank in this utility model.

[0023] Figure 4 for Figure 3 Enlarged structural diagram of section B in the middle;

[0024] Figure 5 This is a partial cross-sectional structural diagram of the sedimentation tank in this utility model;

[0025] Figure 6 This is a schematic diagram of the cleaning mechanism in this utility model from a frontal view.

[0026] Figure 7 This is a partial planar structural diagram of the water outlet channel in this utility model;

[0027] In the diagram: Pool body 1, sedimentation zone 10, central column 101, slag discharge well 102, partition bar 1021, slag discharge port 1022, scum discharge pipe 103, water inlet channel 11, water distribution hole 110, water inlet pipe 111, water outlet channel 12, flow equalization component 120, drainage channel 121, drainage well 13, drainage pipe 130, passage bridge 14, sludge scraping mechanism 2, sludge scraper 20, drive motor 21, sludge suction pipe 22, sludge suction hole 220, sludge discharge pipe 23, cleaning mechanism 3, baffle 30, interception part 301, slag collection part 302, slag collection trough 303, skirt 31, brush bar 310. Detailed Implementation

[0028] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0029] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] refer to Figure 1-7 This utility model provides a radial flow sedimentation tank, including a tank body 1, a sludge scraping mechanism 2, and a cleaning mechanism 3. The tank body 1 is generally circular and has a sedimentation zone 10, an inlet channel 11, and an outlet channel 12. The inlet channel 11 introduces wastewater into the sedimentation zone 10 for sedimentation through an inlet pipe 111. Under the action of gravity, the sludge settles at the bottom of the sedimentation zone 10, while the clear water at the top is discharged to the drain pipe 130 through the outlet channel 12. The inlet channel 11 and the outlet channel 12 are respectively arranged around the sedimentation zone 10, with the inlet channel 11 located outside the outlet channel 12, that is, the inlet channel 11 is arranged around the outer perimeter of the outlet channel 12. For example, from the top view of the sedimentation tank (reference). Figure 1The sedimentation tank consists of an inlet channel 11 near the outer perimeter, an outlet channel 12 in the middle, and a sedimentation zone 10 in the inner perimeter. This embodiment of the radial flow sedimentation tank employs a "circumferential inlet and outlet" sedimentation method, meaning that wastewater is introduced into the sedimentation zone 10 from its outer perimeter, and the settled water is then discharged from the outer perimeter of the sedimentation zone 10. The bottom of the inlet channel 11 is provided with multiple distribution holes 110 along its circumferential direction. The inlet channel 11 communicates with the sedimentation zone 10 through the distribution holes 110, allowing wastewater to settle more evenly and slowly to the bottom of the sedimentation zone 10. The sedimentation zone 10 is also connected to the outlet channel 12.

[0032] A central column 101 is provided in the center of the sedimentation zone 10. The central column 101 can be formed by pouring concrete such as cement, and it serves as a fixing pile. One end of the central column 101 is fixed to the bottom of the sedimentation zone 10, and the other end extends upward relative to the bottom of the sedimentation zone 10.

[0033] refer to Figure 3 The sludge scraping mechanism 2 and the cleaning mechanism 3 are respectively located at the bottom and top of the tank body 1. The cleaning mechanism 3 can rotate around the central column 101. The rotation path of the cleaning mechanism 3 can at least cover the water surface area between the sedimentation zone 10 and the outlet channel 12. The cleaning mechanism 3 is used to clean the scum on the water surface. Here, "the rotation path of the cleaning mechanism 3 can cover the water surface area between the sedimentation zone 10 and the outlet channel 12" means that the effective working range of the cleaning mechanism 3 in the radial direction of the sedimentation tank is from the sedimentation zone 10 to the outlet channel 12. It can also be understood as the projection of the cleaning mechanism 3 in the radial direction of the sedimentation tank extending from near the center of the sedimentation zone 10 to the edge of the outlet channel 12, or even the edge of the inlet channel 11. This allows the cleaning mechanism 3 to clean a larger radius during rotation.

[0034] Since these radial flow sedimentation tanks are generally built outdoors, algae will continuously proliferate on the water surface under prolonged sunlight exposure in an open environment, causing significant difficulties for manual cleaning. Therefore, in this embodiment, as the cleaning mechanism 3 rotates around the central column 101, it can cover the water surface area between the sedimentation zone 10 and the outlet channel 12 or the inlet channel 11 along its rotation path. This allows for better collection and cleaning of algae on the water surface, improving cleaning efficiency and avoiding the risks associated with manual cleaning.

[0035] This utility model provides two implementation methods for driving the baffle 30 of the cleaning mechanism 3:

[0036] In embodiment 1, the cleaning mechanism 3 includes a driver (e.g., a motor) and a baffle 30 connected to each other. The driver is fixed to the top of the central column 101. One end of the baffle 30 is rotatably connected to the central column 101, and the other end extends outward relative to the central column 101. The driver can drive the baffle 30 to rotate around the central column 101. In this embodiment, the baffle 30 has an independent driver to drive its rotation. Specifically, the driver can be a motor. The driver is fixed to the top of the central column 101. The baffle 30 serves as a cleaning component for the water surface area. One end of the baffle is rotatably connected to the central column 101, and the other end extends outward relative to the central column 101. The outward extension refers to the extension along the radial direction of the pool body 1 until it reaches the edge of the outlet channel 12 (or the edge of the inlet channel 11). When the driver is working, it drives the baffle 30 to rotate around the central axis of the central column 101 (specifically, it can be achieved by a worm gear transmission structure or a gear transmission structure to drive the driver to drive the baffle 30 to rotate around the central column). During the rotation, the baffle 30 continuously intercepts and collects the floating scum (such as algae like duckweed or some light floating debris) on the water surface, and then cleans the collected debris uniformly, resulting in higher cleaning efficiency.

[0037] refer to Figure 3 In embodiment 2, the sludge scraping mechanism 2 includes a scraper blade 20 and a drive motor 21. The drive motor 21 is fixed to the top of the central column 101, and the scraper blade 20 is rotatably connected to the bottom of the central column 101. The drive motor 21 can drive the scraper blade 20 to rotate around the central column 101. The cleaning mechanism 3 includes a baffle 30, which is fixed to the scraper blade 20. When the drive motor 21 drives the scraper blade 20 to rotate, it can simultaneously drive the baffle 30 to rotate around the central column 101. In this embodiment, the baffle 30 and the scraper blade 20 share a common drive; in other words, the drive motor 21 of the sludge scraping mechanism 2 indirectly drives the baffle 30 to rotate. Specifically, in this embodiment, the baffle 30 of the cleaning mechanism 3 is directly fixed to the top of the scraper 20 (specifically, stainless steel can be used as a connecting plate to fix the baffle 30 to the top of the scraper 20; the fixing method can be bolt fixing, etc., and the specific fixing method is not limited); one end of the scraper 20 is rotatably connected to the central column 101. When the drive motor 21 drives the scraper 20 to rotate around the central column 101, it is also equivalent to indirectly driving the baffle 30 to rotate synchronously with the scraper 20. Therefore, the rotation speed of the two can be kept the same, avoiding excessive turbulence on the water surface (generally, this rotation speed is very slow, and the time for the scraper to rotate around the central column is about 20-30 minutes). The way the drive motor 21 drives the scraper 20 to rotate is a common working principle of center-driven scrapers in the art, which will not be described in detail here.

[0038] In both Embodiment 1 and Embodiment 2, the baffle 30 is made of stainless steel. Since it needs to be immersed in water for operation, stainless steel has good corrosion resistance, which can extend the service life of the baffle 30. At the same time, the replacement cost is relatively low.

[0039] refer to Figure 1 and 6 In a preferred embodiment, the baffle 30 has an interception part 301 and a slag collection part 302 connected to each other. The interception part 301 extends radially along the pool body 1, and the slag collection part 302 is located near the outlet channel 12. The first end of the slag collection part 302 is connected to the interception part 301, and the second end extends circumferentially along the pool body 1 and extends from the second end toward the outlet channel 12 to form a slag collection trough 303. Specifically, the interception part 301 and the slag collection part 302 are roughly "U" shaped when viewed from above. This has the advantage of facilitating the collection of floating objects on the water surface to one place. On the other hand, since a slag discharge well 102 is provided in the sedimentation zone 10, and the opening of the slag collection trough 303 faces the slag discharge well 102, it is convenient to couple the slag collection part 302 with the slag discharge well 102 one-to-one, thereby discharging the slag. The bottom of the slag discharge well 102 is connected to the slag discharge pipe 103. When the baffle 30 rotates, the slag in the slag collection trough 303 can be discharged into the slag discharge pipe 103 through the slag discharge well 102 for final unified cleaning, which is more convenient.

[0040] refer to Figure 1 and 2 In a further preferred embodiment, a plurality of spacers 1021 are spaced apart at the wellhead of the slag discharge well 102, and a slag discharge port 1022 is formed between two adjacent spacers 1021. The spacers 1021 serve as reinforcing ribs on the one hand, and as flow equalization on the other.

[0041] refer to Figure 5 and 6 In a preferred embodiment, the cleaning mechanism 3 further includes a skirt plate 31, which is fixed to one end of the baffle 30 near the outlet channel 12. The bottom of the skirt plate 31 is divided into multiple brush strips 310. When the baffle 30 rotates, the skirt plate 31 also rotates. During rotation, the brush strips 310 formed at the bottom of the skirt plate 31 continuously rub against the wall of the outlet channel 12, thus scraping off some algae adhering to the wall of the outlet channel 12, further achieving a cleaning effect. In a further preferred embodiment, the skirt plate 31 is made of rubber. Using rubber provides friction resistance and corrosion resistance.

[0042] In a preferred embodiment, the height of the central column 101 is greater than the depth of the sedimentation zone 10. That is, when the water level in the sedimentation zone 10 reaches its highest point, a portion of the central column 101 can still be exposed above the water surface. Since the driver / drive motor 21 and the like are all installed at the top of the central column 101, they can be prevented from being submerged in water, thus protecting the equipment.

[0043] refer to Figure 3 and 4 In a preferred embodiment, the sludge scraping mechanism 2 includes a scraper 20, a drive motor 21, and a suction pipe 22. The drive motor 21 is fixed to the top of the central column 101, and the scraper 20 and the suction pipe 22 are rotatably connected to the bottom sides of the central column 101, respectively. The drive motor 21 can drive the scraper 20 and the suction pipe 22 to rotate. The suction pipe 22 has a plurality of spaced suction holes 220 along its length, and the suction holes 220 penetrate along the radial direction of the suction pipe 22. Multiple suction holes 220 are provided on the suction pipe 22. During operation, the sludge at the bottom of the tank is sucked into the suction pipe 22 through these holes using the siphon principle. A sludge discharge pipe 23 is also provided at the bottom of the sedimentation zone 10. At least part of the sludge discharge pipe 23 extends out of the tank body 1. The suction pipe 22 and the sludge discharge pipe 23 are connected. The sludge is collected by the suction pipe 22 and then collected into the sludge discharge pipe 23. One end of the sludge discharge pipe 23 is connected to the sludge pump tank, thereby collecting the sludge into the sludge pump tank for subsequent treatment. Furthermore, the bottom of the sedimentation tank is inclined from the periphery towards the center, forming a slope. This allows the sludge to continuously converge towards the center under the guidance of the slope when it sinks to the bottom of the tank, making it easier to collect and clean the sludge.

[0044] refer to Figure 7 In a preferred embodiment, a plurality of flow equalization elements 120 are arranged around the wall of the outlet channel 12; the flow equalization elements 120 are triangular or trapezoidal in cross-section, but are not limited to other shapes of flow equalization elements 120. When a plurality of flow equalization elements 120 are connected together, a drainage channel 121 is formed between two adjacent flow equalization elements 120, so that the water flow is discharged outward more evenly; a drainage well 13 is provided on one side of the pool body 1, and a drainage pipe 130 is provided at the bottom of the drainage well 13. The drainage channel 121, the drainage well 13 and the drainage pipe 130 are connected in sequence.

[0045] refer to Figure 1 and 4 In a further preferred embodiment, the sedimentation tank also has a passage bridge 14. The sedimentation tank is surrounded by a wall. One end of the passage bridge 14 is fixed to the central column 101, and the other end is fixed to the wall, so that workers can walk through the passage bridge 14 to the position of the central column 101, which facilitates subsequent maintenance of equipment such as the driver / drive motor 21.

[0046] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A radial flow sedimentation tank, characterized in that, The system includes a tank body, a sludge scraping mechanism, and a cleaning mechanism. The tank body has a sedimentation zone, an inlet channel, and an outlet channel. The inlet channel and the outlet channel are respectively arranged around the sedimentation zone, with the inlet channel located outside the outlet channel. The inlet channel has multiple water distribution holes arranged around its circumference, and the inlet channel communicates with the sedimentation zone through the water distribution holes. The sedimentation zone is also connected to the outlet channel. A central column is provided at the center of the sedimentation zone. One end of the central column is fixed to the bottom of the sedimentation zone, and the other end extends upward relative to the bottom of the sedimentation zone. The sludge scraping mechanism and the cleaning mechanism are respectively located at the bottom and top of the pool. The cleaning mechanism can rotate around the central column. The rotation path of the cleaning mechanism can at least cover the water surface area between the sedimentation zone and the outlet channel. The cleaning mechanism is used to clean the scum on the water surface area.

2. The radial flow sedimentation tank as described in claim 1, characterized in that, The cleaning mechanism includes a drive and a baffle connected together. The drive is fixed to the top of the central column. One end of the baffle is rotatably connected to the central column, and the other end extends outward relative to the central column. The drive can drive the baffle to rotate around the central column.

3. The radial flow sedimentation tank as described in claim 1, characterized in that, The sludge scraping mechanism includes a scraper blade and a drive motor. The drive motor is fixed to the top of the central column, and the scraper blade is rotatably connected to the bottom of the central column. The drive motor can drive the scraper blade to rotate around the central column. The cleaning mechanism includes a baffle plate, which is fixed to the scraper blade. When the drive motor drives the scraper blade to rotate, it can simultaneously drive the baffle plate to rotate around the central column.

4. The radial flow sedimentation tank as described in any one of claims 2 or 3, characterized in that, The baffle has an interception section and a slag collection section connected together. The interception section extends radially along the pool body, and the slag collection section is located near the outlet channel. The first end of the slag collection section is connected to the interception section, and the second end extends circumferentially along the pool body and extends from the second end toward the outlet channel to form a slag collection trough. A slag discharge well is provided in the sedimentation zone. The opening of the slag collection trough faces the slag discharge well, and a scum discharge pipe is connected to the bottom of the slag discharge well. When the baffle rotates, the scum in the slag collection trough can be discharged into the scum discharge pipe through the slag discharge well.

5. The radial flow sedimentation tank as described in claim 4, characterized in that, The slag discharge well has multiple spacers spaced apart at its opening, and a slag discharge port is formed between two adjacent spacers.

6. The radial flow sedimentation tank as described in any one of claims 2 or 3, characterized in that, The cleaning mechanism also includes a skirt board, which is fixed to one end of the baffle near the water outlet channel, and the bottom of the skirt board is divided into multiple brush strips.

7. The radial flow sedimentation tank as described in claim 6, characterized in that, The skirt is made of rubber.

8. The radial flow sedimentation tank as described in claim 1, characterized in that, The height of the central pillar is greater than the depth of the sedimentation zone.

9. The radial flow sedimentation tank as described in claim 1, characterized in that, The sludge scraping mechanism includes a scraper, a drive motor, and a suction pipe. The drive motor is fixed to the top of the central column, and the scraper and suction pipe are rotatably connected to the bottom sides of the central column, respectively. The drive motor can drive the scraper and suction pipe to rotate. The suction pipe has multiple spaced suction holes along its length, and the suction holes penetrate the suction pipe radially. A sludge discharge pipe is also provided at the bottom of the sedimentation zone, and at least part of the discharge pipe extends out of the tank body. The suction pipe is connected to the discharge pipe.

10. The radial flow sedimentation tank as described in claim 1, characterized in that, The wall of the outlet channel is provided with multiple flow equalization elements; a drainage channel is formed between two adjacent flow equalization elements; a drainage well is provided on one side of the pool, and a drainage pipe is provided at the bottom of the drainage well; the drainage channel, drainage well and drainage pipe are connected in sequence.

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