A cleaning system for a sedimentation basin

Abstract

The application discloses a cleaning system for a sedimentation tank, which comprises the sedimentation tank, a sludge discharge unit and a sedimentation device arranged in sequence from the bottom to the top of the sedimentation tank, the sedimentation device comprises a plurality of parallelly distributed inclined plates, over-flow zones and sludge sliding zones are formed between adjacent inclined plates, and a gas washing system is arranged below the sedimentation device; a supporting frame is arranged at the bottom of the sedimentation device, a plurality of flow guide plates are arranged on the supporting frame, and the gas washing system can spray gas and wash the sludge sliding zone of the sedimentation device through the flow guide of the flow guide plates. The gas washing system is combined with the flow guide plates, the gas flow is directly washed against the sludge sliding wall, the washing effect of the gas flow is obviously enhanced, the influence on the sludge settlement is reduced, the gas washing system is suitable for cleaning of sedimentation devices with various structures, various effects in the washing process can be realized, the attachments on the bottom of the sedimentation tank and the inclined plates are completely removed, and the high-efficiency sedimentation and the effective cleaning of the sedimentation tank are ensured.

Description

Technical Field

[0001] This invention relates to the field of environmental protection water supply and drainage technology, and in particular to a cleaning system for sedimentation tanks. Background Technology

[0002] Sedimentation tanks are a key process in water purification, used to settle flocculated particles / flocculations in the water. For efficient operation, sedimentation tanks require regular cleaning to remove any deposits from the sedimentation equipment.

[0003] Due to the small internal structure of the sedimentation device, existing technologies make it difficult to thoroughly clean the device; manual cleaning can easily damage the device and is also inefficient.

[0004] Currently, there are also sedimentation tank cleaning systems on the market. As shown in patent publication number CN106512494A, such systems use a common inclined plate as the sedimentation device. The cleaning device employs air jet cleaning below the sedimentation device at the bottom of the sedimentation tank. Compressed air enters the bottom of the sludge hopper, blowing away the sludge caked on the inner wall of the hopper. The gas strongly disturbs the sludge. Furthermore, the compressed gas rises from the bottom of the sludge hopper to the inclined plate, where it again blows away the sludge. However, this air-washing method is relatively ineffective, and manual cleaning is still necessary after a period of time. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention designs a cleaning system for sedimentation tanks, achieving both efficient sedimentation and effective cleaning while reducing the intensity of manual cleaning.

[0006] The present invention adopts the following technical solution:

[0007] A cleaning system for a sedimentation tank includes a sedimentation tank, wherein a sludge discharge unit and a sedimentation device are arranged sequentially from bottom to top in the sedimentation tank, the sedimentation device includes multiple parallel inclined plates, and a flow zone and a sludge sliding zone are formed between adjacent inclined plates, and an air washing system is provided below the sedimentation device.

[0008] The bottom of the sedimentation device is provided with a support frame, and multiple guide plates are provided on the support frame. The gas washing system can spray gas and flush the mud-slipping area of ​​the sedimentation device through the guide plates.

[0009] The air washing system can spray gas and guide it through the baffle plate to directly flush the mud wall, significantly enhancing the flushing effect of the airflow.

[0010] Preferably, the inclined plate adopts a horizontal tubular sedimentation structure, with a reserved space between two adjacent horizontal tubular sedimentation structures. The horizontal tubular sedimentation structure is composed of multiple wing plate units. Each wing plate unit includes a base plate, on which multiple ribs are fixed. Wing plates are fixed on the ribs through insertion slots. The multiple wing plates are arranged parallel to each other along the length direction of the ribs. When the multiple wing plate units are assembled, the wing plate of each wing plate unit is fixed on the base plate of the adjacent wing plate unit, and a flow passage is formed between the wing plate and the base plate of the adjacent wing plate unit. A mud-sliding area is formed between the free edge of the wing plate and the base plate of the wing plate unit where the wing plate is located.

[0011] The air bubbles discharged from the air washing system flush and disturb the sediment at the bottom of the tank, washing away the dead zone of accumulated sludge, causing the sludge to rise and mix with the water to form a mixed liquid. At the same time, the air bubbles also flush away the deposits on the horizontal tubular sedimentation structure through the guide plate.

[0012] During this process, numerous air bubbles disturb the water near the horizontal tubular sedimentation structure, creating turbulent currents that wash away deposits on the wing plate units. Simultaneously, they accumulate in the space below the wing plates, removing deposits through gas friction against the wing plate surface. This promotes the detachment of easily detached deposits and exposes relatively stubborn deposits to the mixed liquid. During subsequent continuous aeration, an air cushion layer forms along the length of the wing plates. Due to the turbulent disturbance of the mixed liquid and the accumulation of air bubbles, the air-water agitated mixture further washes away stubborn deposits adhering to the wing plate unit surface. Simultaneously, some gas from the air cushion layer overflows from the free side of the wing plates, rises along the muddy area, and enters the upper flow area, gradually forming a new air cushion layer. This cycle continues until all flow areas of the horizontal tubular sedimentation structure are cleaned. The cleaning process of this structure integrates various complex forces, including gas friction, the impact of air bubble bursts, pressure changes caused by continuous fluctuations in water pressure and airflow, and turbulence of the mixed liquid. At the same time, the air cushion layer ensures uniform air distribution from the wing plate, rib plate and even the entire horizontal tubular sedimentation structure, achieving comprehensive, dead-angle-free and efficient cleaning of the horizontal tubular sedimentation structure, and effectively removing the deposits inside the sedimentation device.

[0013] Preferably, the inclined plate is an upward flow type, and a main water collection trough and a branch water collection trough are provided above the upward flow type; the sedimentation tank has a sedimentation tank inlet below the sedimentation device, and a flow zone and a mud sliding zone are formed between adjacent upward flow type inclined plates.

[0014] During the air-water backwashing process, the backwashing gas passes through the main air inlet pipe and the branch air inlet pipe of the sludge discharge pipe in sequence and enters the corresponding sludge discharge pipe. It is then sprayed out through the perforations on the sludge discharge pipe, flushing and disturbing the sedimented sludge at the bottom of the pool, flushing the dead sludge zone, and causing the sludge to rise and mix with the water to form a mixed liquid. At the same time, the air bubbles rise and are guided by the guide plate to flush the attached materials on the upward flow inclined plate mud sliding zone.

[0015] Preferably, the guide plate is positioned below the inclined plate body of the inclined plate, and its length direction is consistent with that of the inclined plate body. The guide plate includes an arc-shaped section and a straight section, with the straight section vertically positioned. The convex surface of the arc-shaped section faces the back of the inclined plate body above it, and the concave surface of the arc-shaped section faces the front of the adjacent inclined plate body. Through the guide plate, gas is directly flushed away the sludge on the front of the inclined plate, improving the flushing effect. Simultaneously, the guide plate's position below the front of the inclined plate reduces its impact on sludge settling.

[0016] Preferably, the sludge discharge unit includes multiple sludge discharge pipes, with a mud-sliding plate arranged between two adjacent sludge discharge pipes. A sludge accumulation area is formed between the sludge discharge pipe and the adjacent mud-sliding plates on both sides. Multiple perforations are provided on the sludge discharge pipe. One end of the sludge discharge pipe extends into the sedimentation tank and is closed at the end. The other end of the sludge discharge pipe extends out of the outside of the sedimentation tank, and a sludge discharge valve is installed at this end.

[0017] Preferably, the air washing system includes a sludge discharge pipe air washing system, which includes a main air inlet pipe for the sludge discharge pipe. The main air inlet pipe is connected to the sludge discharge pipe through branch air inlets, and each branch air inlet pipe is equipped with a sludge discharge pipe air inlet valve.

[0018] During the operation of the sludge discharge pipe air washing system, the air bubbles discharged from the sludge discharge pipe flush and disturb the sedimented sludge at the bottom of the tank, flushing the dead zone of sludge accumulation, causing the sludge to rise and mix with the water to form a mixed liquid. At the same time, the air bubbles also flush the attached substances on the horizontal tubular sedimentation structure.

[0019] Preferably, the air washing system includes a support frame air washing system, which includes a support frame installed below the sedimentation device. The support frame has a support frame base, which is mounted on the sludge discharge unit. The support frame is installed between the sludge discharge unit and the sedimentation device via the support frame base. The support frame is provided with support frame branch pipes, and multiple support frame branch pipe air holes are opened near the bottom of the support frame branch pipes. The length direction of the wing plate is perpendicular to the length direction of the support frame branch pipes. The support frame is connected to a support frame main air inlet pipe via the support frame branch air inlet pipes, and a support frame air inlet valve is also provided on the support frame main air inlet pipe.

[0020] During the operation of the support frame air washing system, the air bubbles discharged from the support frame flush and disturb the sediment at the bottom of the pool, flushing the dead zone of accumulated sludge, causing the sludge to rise and mix with the water to form a mixed liquid. At the same time, the air bubbles also flush the attached substances on the horizontal tubular sedimentation structure.

[0021] Preferably, the main air inlet pipe of the support frame is located above the sedimentation device, and the air inlet end of the main air inlet pipe is connected to a water hammer inlet pipe. The water inlet end of the water hammer inlet pipe is lower than the main air inlet pipe of the support frame and is connected to an external air source. This structure avoids the influence of water hammer effect.

[0022] Preferably, the distance from the air hole of the support bracket branch pipe to the top of the support bracket is Z1, and Z1 accounts for 50% to 90% of the height of the entire support bracket, thereby forming the mud collection area of ​​the support bracket.

[0023] The Z1 setting enhances the formation of air bubbles discharged from the vent holes of the support branch pipe, thereby increasing the scouring force of the air bubbles. On the other hand, it creates a mud collection area on the support, which helps the mud and sludge generated in the horizontal tubular sedimentation structure to fall off, reducing the risk of the vent holes of the support branch pipe being blocked.

[0024] Preferably, baffles are fixedly installed on both the front and rear sides of the support frame where the horizontal tubular sedimentation structure is installed. This structure is used to prevent short-circuiting of the horizontal tubular sedimentation structure.

[0025] Preferably, the rib plate is divided into two side rib plates and a central rib plate located in the middle of the bottom plate. Multiple side insertion slots are provided on the side rib plates, and a central insertion slot is provided on the central rib plate. The central insertion slot is slightly higher than the side insertion slots. When the wing plate is installed on the side rib plates and the central insertion slot respectively through the side insertion slots and the central insertion slot, it is bent to form an arc-shaped wing plate.

[0026] During the influent process of the sedimentation tank, the water flows through the horizontal tubular sedimentation structure. As it passes over the surface of the arc-shaped wing plate, due to the Coanda effect, the water tends to approach and flow along the surface of the arc-shaped wing plate, increasing the contact area of ​​the flocculent particles on the arc-shaped wing plate, thereby effectively improving the aggregation and deposition of the flocculent particles on the surface of the arc-shaped wing plate. At the same time, the sludge formed can not only slide down the arc-shaped surface of the arc-shaped wing plate under the action of gravity, but also slide from the middle to both sides, providing a choice of sludge sliding path, reducing the probability of blockage of the horizontal tubular sedimentation structure, thereby greatly improving the sedimentation efficiency of the horizontal tubular sedimentation structure.

[0027] During the air-water washing process of the sludge discharge pipe and support frame, when the air bubbles gather below the arc-shaped wing plate, they can accumulate towards the center along the surface of the arc-shaped wing plate under the action of buoyancy. This increases the distance of gas friction on the surface of the arc-shaped wing plate, making it easier for the attached substances to detach from the surface of the arc-shaped wing plate. It also promotes the flow of water and gas in the length direction of the arc-shaped wing plate, effectively aggravating the air-water disturbance between the wing plate units, thereby significantly improving the air-water washing effect of the horizontal tubular sedimentation structure.

[0028] Preferably, the rib has an L-shaped or T-shaped cross-section. The rib includes a fixed blade and an insert blade. The folding angle Q between the insert blade and the fixed blade ranges from 90° to 180°, where 90° is the endpoint and 180° is not. The inclined insert blade acts as a guide, reducing obstruction to the flow; simultaneously, the guiding effect of the insert blade prevents the formation of a dead zone for mud accumulation at the angle between the insert blade and the fixed blade.

[0029] Preferably, the ratio of the height h1 of the sludge discharge pipe to the diameter h2 of the sludge discharge pipe and the distance h3 from the sludge discharge pipe to the bottom of the pool is 3:2:1, where the height of the sludge discharge pipe refers to the distance from the top of the sludge discharge pipe to the bottom of the pool; the diameter of the sludge discharge pipe is the diameter of its cross-section; and the distance from the sludge discharge pipe to the bottom of the pool is the distance from the bottom of the sludge discharge pipe to the bottom of the pool. Furthermore, the ratio of the total perforated area of ​​the sludge discharge pipe to its cross-sectional area is greater than or equal to 90% and less than 100%. This layout structure achieves a balance between efficient sedimentation and effective cleaning in the sedimentation tank.

[0030] The beneficial effects of this invention are:

[0031] (1) The air flushing system used in this invention is suitable for cleaning sedimentation devices with various structures. By combining the horizontal tubular sedimentation structure or the upward flow inclined plate with the air flushing system, multiple effects can be achieved during the flushing process. It thoroughly removes the deposits on the bottom of the sedimentation tank and the inclined plate, ensuring both efficient sedimentation and effective cleaning of the sedimentation tank.

[0032] (2) The present invention adopts a combination of a guide plate and an air washing system. The air washing system can spray gas through the guide plate to flush the mud wall of the inclined plate / wing plate, so as to promote the airflow to directly flush the mud wall, significantly enhance the flushing effect of the airflow, and at the same time reduce the impact on mud sedimentation.

[0033] (3) The distance Z1 from the air hole of the support branch pipe to the top of the support increases the formation of air bubbles discharged from the air hole of the support branch pipe and increases the flushing force of the air bubbles. On the other hand, it forms a mud collection area of ​​the support, which helps the mud and dirt generated in the horizontal pipe sedimentation structure to fall down and reduces the risk of the air hole of the support branch pipe being blocked.

[0034] (4) The arc-shaped wing plate of the present invention reduces the probability of blockage of the horizontal tube sedimentation structure, thereby greatly improving the sedimentation efficiency of the horizontal tube sedimentation structure. At the same time, it increases the distance of gas friction on the surface of the arc-shaped wing plate, making it easier for the attached substances to detach from the surface of the arc-shaped wing plate. It also promotes the flow of water and gas in the length direction of the arc-shaped wing plate, effectively aggravating the gas-water disturbance between the wing plate units, thereby significantly improving the gas-water flushing effect of the horizontal tube sedimentation structure.

[0035] (5) The baffles on the front and rear sides of the horizontal tube sedimentation structure of the support frame avoid short flow of the horizontal tube sedimentation structure; and during the operation of the sludge discharge pipe air washing system, the baffles can also gather the gas under the horizontal tube sedimentation structure, accelerate the formation of the air cushion layer, and improve the air and water washing efficiency.

[0036] (6) By rationally arranging the total length of the horizontal tubular sedimentation structure, the length of the sedimentation tank, the height h1 of the sludge discharge pipe, the diameter h2 of the sludge discharge pipe, the distance h3 from the bottom of the tank to the sludge discharge pipe, the total perforation area of ​​the sludge discharge pipe and the cross-sectional area of ​​the sludge discharge pipe, the sedimentation tank can achieve both efficient sedimentation and effective cleaning.

[0037] (7) The present invention is equipped with a sludge discharge pipe air washing system and a support frame air washing system. The air bubbles discharged from the sludge discharge pipe and the support frame agitate the sludge in the sedimentation tank area and the attached substances on the inclined plate, mixing the sludge with the water to form a mixed liquid. The mixed liquid has a better effect on flushing the horizontal tubular sedimentation structure. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of a structure according to Embodiment 1 of the present invention;

[0039] Figure 2 yes Figure 1 A side view;

[0040] Figure 3 This is a top view of the support frame in Embodiment 1 of the present invention;

[0041] Figure 4 This is a schematic diagram of a horizontal tubular sedimentation structure and support frame in Embodiment 1 of the present invention;

[0042] Figure 5 This is a schematic diagram of a structure according to Embodiment 2 of the present invention;

[0043] Figure 6 yes Figure 5 A side view;

[0044] Figure 7 yes Figure 6 A top view;

[0045] Figure 8yes Figure 7 A cross-sectional view along the AA direction;

[0046] Figure 9 yes Figure 7 A cross-sectional view along the BB direction;

[0047] Figure 10 yes Figure 8 Enlarged view of point C in the middle;

[0048] Figure 11 yes Figure 9 A cross-sectional view in the DD direction;

[0049] Figure 12 yes Figure 11 Enlarged view at point E in the middle;

[0050] Figure 13 This is a partial structural schematic diagram of the horizontal tubular precipitation structure in Embodiment 3 of the present invention;

[0051] Figure 14 This is a schematic diagram of a horizontal tubular precipitation structure in Embodiment 3 of the present invention;

[0052] Figure 15 yes Figure 14 Enlarged view of section H in the middle;

[0053] Figure 16 This is a schematic diagram of a structure of the first type of rib plate in this invention;

[0054] Figure 17 yes Figure 16 A cross-sectional view in the middle II direction;

[0055] Figure 18 This is a schematic diagram of a structure of the second type of rib in this invention;

[0056] Figure 19 yes Figure 18 A cross-sectional view along the JJ direction;

[0057] Figure 20 This is a schematic diagram of a structure of the third type of rib in this invention;

[0058] Figure 21 This is a schematic diagram of a structure in Embodiment 5 of the present invention;

[0059] Figure 22 yes Figure 21 A left view;

[0060] Figure 23 yes Figure 22 A cross-sectional view along the KK direction;

[0061] Figure 24yes Figure 22 A cross-sectional view in the LL direction;

[0062] Figure 25 yes Figure 22 Enlarged view at point M;

[0063] Figure 26 This is a schematic diagram of a structure according to Embodiment 6 of the present invention;

[0064] Figure 27 This is a top view of the support frame in Embodiment 6 of the present invention;

[0065] Figure 28 yes Figure 27 A cross-sectional view in the FF direction;

[0066] Figure 29 yes Figure 27 A cross-sectional view in the GG direction;

[0067] In the diagram: 1. Sedimentation tank; 110. Sedimentation tank inlet; 2. Sedimentation device; 210. Horizontal tubular sedimentation structure; 211. Bottom plate; 212. Rib plate; 212-1. Side rib plate; 212-2. Middle rib plate; 2121. Fixed blade plate; 2122. Insert blade plate; 213. Insert groove; 213-1. Side plate insert groove; 213-2. Middle insert groove; 214. Wing plate; 214'. Arc-shaped wing plate; 215. Sludge sliding zone; 216. Flow zone; 217. Air cushion layer; 218. Reserved space; 220. Upward flow inclined plate; 221. Front of inclined plate; 222. Back of inclined plate; 3. Sludge discharge unit; 310. Sludge discharge pipe; 311. Sludge discharge valve; 312. 1. Sludge discharge pipe; 320. Sludge sliding plate; 330. Sludge accumulation area; 4. Sludge discharge pipe air washing system; 410. Sludge discharge pipe main air inlet pipe; 420. Sludge discharge pipe branch air inlet pipe; 421. Sludge discharge pipe air inlet valve; 5. Support frame air washing system; 510. Support frame; 511. Support frame branch pipe; 512. Support frame branch pipe air hole; 513. Support frame sludge collection area; 514. Connecting reinforcement pipe; 520. Support frame main air inlet pipe; 521. Water hammer air inlet pipe; 530. Support frame branch air inlet pipe; 531. Support frame air inlet valve; 540. Support frame base; 550. Water baffle; 551. Waist-shaped hole; 552. Bolt assembly; 553. Extended baffle; 6. Main water collection tank; 61. Branch water collection tank. Detailed Implementation

[0068] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0069] Example 1: As Figures 1-4As shown, a cleaning system for a sedimentation tank includes a sedimentation tank 1, and the sedimentation tank 1 is arranged from bottom to top with a sludge discharge unit 3, a sludge discharge pipe air washing system 4, and a sedimentation device 2.

[0070] The sludge discharge unit 3 includes multiple sludge discharge pipes 310. Sliding plates 320 are arranged between two adjacent sludge discharge pipes 310, and a sludge accumulation area 330 is formed between the sludge discharge pipes 310 and the adjacent sliding plates 320 on both sides. Multiple perforations are opened on the sludge discharge pipes 310. One end of the sludge discharge pipe 310 extends into the sedimentation tank 1 and is closed at the end. The other end of the sludge discharge pipe 310 extends out of the outside of the sedimentation tank 1, and a sludge discharge valve 311 is installed at this end.

[0071] The sedimentation device 2 is installed above the sludge discharge unit 3 and includes multiple horizontal tubular sedimentation structures 210. A reserved space 218 is provided between adjacent horizontal tubular sedimentation structures 210. Figure 10 As shown, the horizontal tubular sedimentation structure 210 is composed of multiple wing plate units; each wing plate unit includes a base plate 211, and multiple ribs 212 are fixed on the base plate 211. Wing plates 214 are fixed on the ribs 212 through insertion slots 213. The multiple wing plates 214 are arranged parallel to each other along the length direction of the ribs 212.

[0072] When multiple airfoil units are assembled, the airfoil 214 of each airfoil unit is fixed on the bottom plate 211 of the adjacent airfoil unit, thereby forming a flow area 216 between the airfoil 214 and the bottom plate 211 of the adjacent airfoil unit; the free edge of the airfoil 214 and the bottom plate 211 of the airfoil unit in which the airfoil 214 is located form a mud-slipping area 215.

[0073] The sedimentation device 2 has a support frame 510 at its bottom, and the support frame 510 has a support frame base 540. The support frame base 540 is mounted on the sludge discharge unit 3, and the support frame 510 is installed between the sludge discharge unit 3 and the sedimentation device 2 through the support frame base 540. The support frame 510 is provided with multiple guide plates 120. The air washing system can spray gas and flush the sludge sliding zone 215 of the sedimentation device 2 through the guide plates 120, thereby cleaning the sedimentation device 2.

[0074] The sludge discharge pipe air washing system 4 includes a sludge discharge pipe main air inlet pipe 410, which is connected to the sludge discharge pipe 310 one by one through sludge discharge pipe branch air inlet pipes 420. A sludge discharge pipe air inlet valve 421 is also provided on the sludge discharge pipe branch air inlet pipe 420.

[0075] Furthermore, the guide vane 120 is disposed below the airfoil 214, and the length direction of the guide vane 120 is consistent with that of the airfoil 214. The guide vane 120 includes an arc-shaped section 121 and a straight section 122, with the straight section 122 being vertically arranged. The convex surface of the arc-shaped section 121 faces the back of the upper rib 212, and the concave surface of the arc-shaped section 121 faces the front of the adjacent rib 212. Through the guide vane 120, the gas directly washes away the mud and dirt on the front of the airfoil 214, improving the washing effect. At the same time, the guide vane 120 is located below the front of the airfoil 214, reducing the impact on mud and dirt settling.

[0076] Furthermore, such as Figure 2 As shown, to prevent short-flow in the horizontal tubular sedimentation structure 210, baffles 550 are installed on the support frame 510. Specifically, baffles 550 are fixedly installed on both the front and rear sides of the support frame 510 where the horizontal tubular sedimentation structure 210 is installed, and the sludge discharge pipe 310 is located between two adjacent baffles 550. The baffles 550 have oblong holes 551, and an extended baffle 553 is fixed to the lower edge of the baffle 550 using bolt assemblies 552. The extended baffle 553 is typically installed in front of the water inlet direction of the horizontal tubular sedimentation structure 210 to improve the water-blocking effect and further prevent short-flow.

[0077] In addition, during the operation of the sludge discharge pipe air washing system 4, the baffle plate 550 can also concentrate the gas below the horizontal tubular sedimentation structure 210, accelerate the formation of the air cushion layer, and improve the air-water washing efficiency.

[0078] When using the cleaning system for this sedimentation tank, first close the sludge discharge valve 311, then open the air inlet valve 421 of the sludge discharge pipe. The air source enters the sludge discharge pipe 310 through the main air inlet pipe 410 and the branch air inlet pipe 420 of the sludge discharge pipe, and the gas is then ejected through the perforations of the sludge discharge pipe 310.

[0079] The air bubbles discharged from the sludge discharge pipe 310 flush and disturb the sedimented sludge at the bottom of the pool, flushing the dead zone of sludge accumulation, causing the sludge to rise and mix with the water to form a mixed liquid. At the same time, the air bubbles also flush the attached substances on the horizontal tubular sedimentation structure 210 through the guide plate 120.

[0080] During this process, a large number of bubbles disturb the water near the horizontal tubular sedimentation structure 210, creating turbulent flow of the mixture that washes away the deposits on the wing plate unit. Simultaneously, they accumulate in the space below the wing plate 214, removing deposits through gas friction against the surface of the wing plate 214. This promotes the detachment of easily detached deposits from the wing plate unit surface and exposes relatively stubborn deposits to the mixture. During the subsequent continuous aeration, an air cushion layer forms along the length of the wing plate 214. Due to the turbulent disturbance of the mixture and the accumulation of bubbles, the mixture, agitated by air and water, further washes away the stubborn deposits adhering to the wing plate unit surface. Simultaneously, some gas in the air cushion layer overflows from the free side of the wing plate 214, floats upward along the muddy sliding zone 215, and enters the upper flow zone 216, gradually forming a new air cushion layer. This cycle continues until all flow zones 216 of the horizontal tubular sedimentation structure 210 are cleaned. The cleaning process of this structure integrates various complex forces such as gas friction, the impact of air bubble bursting, pressure changes caused by water pressure and continuous airflow fluctuations, and turbulence of the mixed liquid. At the same time, the air cushion layer ensures uniform air distribution from the wing plate 214, rib plate 212 and even the entire horizontal tubular sedimentation structure 210, realizing comprehensive, dead-angle-free and efficient cleaning of the horizontal tubular sedimentation structure 210, which can effectively remove the attached substances inside the sedimentation device 2.

[0081] Example 2: Figures 5-12 As shown, a cleaning system for a sedimentation tank includes a sedimentation tank 1, and the sedimentation tank 1 is arranged from bottom to top as follows: a sludge discharge unit 3, a sludge discharge pipe air washing system 4, a support frame air washing system 5, and a sedimentation device 2.

[0082] The sludge discharge unit 3 includes multiple sludge discharge pipes 310. Sliding plates 320 are arranged between two adjacent sludge discharge pipes 310, and a sludge accumulation area 330 is formed between the sludge discharge pipes 310 and the adjacent sliding plates 320 on both sides. Multiple perforations are opened on the sludge discharge pipes 310. One end of the sludge discharge pipe 310 extends into the sedimentation tank 1 and is closed at the end. The other end of the sludge discharge pipe 310 extends out of the outside of the sedimentation tank 1, and a sludge discharge valve 311 is installed at this end.

[0083] The sedimentation device 2 is installed above the sludge discharge unit 3 and includes multiple horizontal tubular sedimentation structures 210. There is a reserved space 218 between two adjacent horizontal tubular sedimentation structures 210. The horizontal tubular sedimentation structure 210 is composed of multiple wing plate units. Each wing plate unit includes a bottom plate 211. Multiple ribs 212 are fixed on the bottom plate 211. Wing plates 214 are fixed on the ribs 212 through insertion grooves 213. The multiple wing plates 214 are arranged parallel to each other along the length direction of the ribs 212.

[0084] When multiple airfoil units are assembled, the airfoil 214 of each airfoil unit is fixed on the bottom plate 211 of the adjacent airfoil unit, thereby forming a flow area 216 between the airfoil 214 and the bottom plate 211 of the adjacent airfoil unit; the free edge of the airfoil 214 and the bottom plate 211 of the airfoil unit in which the airfoil 214 is located form a mud-slipping area 215.

[0085] The sludge discharge pipe air washing system 4 includes a sludge discharge pipe main air inlet pipe 410, which is connected to the sludge discharge pipe 310 one by one through sludge discharge pipe branch air inlet pipes 420. A sludge discharge pipe air inlet valve 421 is also provided on the sludge discharge pipe branch air inlet pipe 420.

[0086] The support frame air washing system 5 includes a support frame 510, which is installed below the sedimentation device 2. The support frame 510 has a support frame base 540, which is mounted on the sludge discharge unit 3. The support frame 510 is installed between the sludge discharge unit 3 and the sedimentation device 2 through the support frame base 540.

[0087] The support frame 510 is equipped with a support frame branch pipe 511. Multiple support frame branch pipe air holes 512 are opened near the bottom of the support frame branch pipe 511. The length direction of the wing plate 214 is perpendicular to the length direction of the support frame branch pipe 511. The support frame 510 is connected to a support frame main air inlet pipe 520 via a support frame branch air inlet pipe 530. The support frame main air inlet pipe 520 is located above the sedimentation device 2. The air inlet end of the support frame main air inlet pipe 520 is connected to a waterproof hammer air inlet pipe 521. The water inlet end of the waterproof hammer air inlet pipe 521 is lower than the support frame main air inlet pipe 520 and is connected to an external air source. A support frame air inlet valve 531 is also provided on the support frame main air inlet pipe 520.

[0088] Furthermore, such as Figure 8 As shown, the distance from the air hole 512 of the support bracket branch pipe to the top of the support bracket 510 is Z1. Z1 accounts for 50% to 90% of the height of the entire support bracket 510, thus forming the mud collection area 513 of the support bracket.

[0089] The Z1 setting enhances the formation of air bubbles discharged from the support branch pipe vent 512, thereby increasing the scouring force of the air bubbles. On the other hand, it forms a mud collection area 513 on the support, which helps the mud and sludge generated in the horizontal tubular sedimentation structure 210 to fall off, reducing the risk of the support branch pipe vent 512 being blocked.

[0090] Furthermore, such as Figure 6As shown, to prevent short-flow in the horizontal tubular sedimentation structure 210, baffles 550 are installed on the support frame 510. Specifically, baffles 550 are fixedly installed on both the front and rear sides of the support frame 510 where the horizontal tubular sedimentation structure 210 is installed, and the sludge discharge pipe 310 is located between two adjacent baffles 550. The baffles 550 have oblong holes 551, and an extended baffle 553 is fixed to the lower edge of the baffle 550 using bolt assemblies 552. The extended baffle 553 is typically installed in front of the water inlet direction of the horizontal tubular sedimentation structure 210 to improve the water-blocking effect and further prevent short-flow.

[0091] In addition, during the operation of the sludge discharge pipe air washing system 4, the baffle plate 550 can also concentrate the gas below the horizontal tubular sedimentation structure 210, accelerate the formation of the air cushion layer, and improve the air-water washing efficiency.

[0092] When using the cleaning system for this sedimentation tank, first close the sludge discharge valve 311, then open the sludge discharge pipe air inlet valve 421. The air source enters the sludge discharge pipe 310 through the main air inlet pipe 410 and the branch air inlet pipe 420. The gas is then ejected through the perforations of the sludge discharge pipe 310. At the same time, the support frame air inlet valve 531 is opened, and the gas enters the support frame branch air inlet pipe 530 from the support frame main air inlet pipe 520, and is ejected from the support frame branch pipe air hole 512 through the support frame branch pipe 511.

[0093] The air bubbles discharged from the sludge discharge pipe 310 and the support frame 510 flush and disturb the sedimented sludge at the bottom of the pool, flushing the dead zone of sludge accumulation, causing the sludge to rise and mix with the water to form a mixed liquid. At the same time, the air bubbles also flush the attached substances on the horizontal tubular sedimentation structure 210.

[0094] During this process, a large number of bubbles disturb the water near the horizontal tubular sedimentation structure 210, creating turbulent flow of the mixture that washes away the deposits on the wing plate unit. Simultaneously, they accumulate in the space below the wing plate 214, removing deposits through gas friction against the surface of the wing plate 214. This promotes the detachment of easily detached deposits from the wing plate unit surface and exposes relatively stubborn deposits to the mixture. During the subsequent continuous aeration, an air cushion layer forms along the length of the wing plate 214. Due to the turbulent disturbance of the mixture and the accumulation of bubbles, the mixture, agitated by air and water, further washes away the stubborn deposits adhering to the wing plate unit surface. Simultaneously, some gas in the air cushion layer overflows from the free side of the wing plate 214, floats upward along the muddy sliding zone 215, and enters the upper flow zone 216, gradually forming a new air cushion layer. This cycle continues until all flow zones 216 of the horizontal tubular sedimentation structure 210 are cleaned. The cleaning process of this structure integrates various complex forces such as gas friction, the impact of air bubble bursting, pressure changes caused by water pressure and continuous airflow fluctuations, and turbulence of the mixed liquid. At the same time, the air cushion layer ensures uniform air distribution from the wing plate 214, rib plate 212 and even the entire horizontal tubular sedimentation structure 210, realizing comprehensive, dead-angle-free and efficient cleaning of the horizontal tubular sedimentation structure 210, which can effectively remove the attached substances inside the sedimentation device 2.

[0095] Compared to a single sludge discharge pipe air washing system 4 or a support frame air washing system 5, the air bubbles discharged by the sludge discharge pipe 310 and the support frame 510 agitate the sludge in the sedimentation tank area and the deposits on the horizontal tubular sedimentation structure 210, mixing the sludge with the water to form a mixed liquid. This mixed liquid has a better effect on flushing the horizontal tubular sedimentation structure 210.

[0096] Example 3: As Figures 13-15 As shown, the difference between this embodiment and Embodiment 1 lies in the improved structure of the precipitation device 2. The specific structure includes:

[0097] Rib 212 is divided into two side ribs 212-1 and a central rib 212-2 located in the middle of the base plate 211. Multiple side insertion slots 213-1 are provided on the side ribs 212-1, and a central insertion slot 213-2 is provided on the central rib 212-2. The central insertion slot 213-2 is slightly higher than the side insertion slots 213-1. When the wing plate 214 is installed on the central rib 212-2 of the side ribs 212-1 through the side insertion slots 213-1 and the central insertion slot 213-2 respectively, it is bent to form an arc-shaped wing plate 214'.

[0098] The difference between the effectiveness of the improved structure and the main effectiveness of Implementation 1 lies in:

[0099] (1) During the water inlet process of the sedimentation tank, the water flows through the horizontal tubular sedimentation structure 210. When it passes the surface of the arc-shaped wing plate 214', due to the Coanda effect, the water flow tends to approach and flow along the surface of the arc-shaped wing plate 214', which increases the contact area of ​​the flocculent particles on the arc-shaped wing plate 214', thereby effectively improving the aggregation and deposition of the flocculent particles on the surface of the arc-shaped wing plate 214'. At the same time, the sludge formed can not only slide down along the arc-shaped surface of the arc-shaped wing plate 214' under the action of gravity, but also slide from the middle to both sides, providing a choice of sludge sliding path, reducing the probability of blockage of the horizontal tubular sedimentation structure 210, thereby greatly improving the sedimentation efficiency of the horizontal tubular sedimentation structure 210.

[0100] (2) During the air-water washing process of the sludge discharge pipe 310 and the support frame 510, when the air bubbles gather below the arc-shaped wing plate 214', they can gather towards the center along the surface of the arc-shaped wing plate 214' under the action of buoyancy, which increases the distance of gas friction on the surface of the arc-shaped wing plate 214', making it easier for the attached substances to detach from the surface of the arc-shaped wing plate 214'; it also promotes the flow of water and gas in the length direction of the arc-shaped wing plate 214', effectively aggravating the air-water disturbance between the wing plate units, thereby significantly improving the air-water washing effect of the horizontal tubular sedimentation structure 210.

[0101] like Figure 16-20 As shown, the cross-section of the rib 212 can be L-shaped or T-shaped. The rib 212 includes a fixed leaf plate 2121 and an insert leaf plate 2122. The folding angle Q between the insert leaf plate 2122 and the fixed leaf plate 2121 is between 90° and 180° (90° is taken as the endpoint, and 180° is not taken as the endpoint).

[0102] Example 4: In this example, the difference from Example 1 lies in the layout structure that embodies both efficient sedimentation and effective cleaning, including:

[0103] The ratio of the height of the sludge discharge pipe (h1): the diameter of the sludge discharge pipe (h2): the distance from the sludge discharge pipe to the bottom of the pool (h3) is 3:2:1.

[0104] The height of the sludge discharge pipe refers to the distance from the top of the sludge discharge pipe to the bottom of the pool; the diameter of the sludge discharge pipe is the diameter of the cross-section of the sludge discharge pipe; the distance from the sludge discharge pipe to the bottom of the pool is the distance from the bottom of the sludge discharge pipe to the bottom of the pool.

[0105] Furthermore, the ratio of the total perforated area of ​​the mud discharge pipe to the cross-sectional area of ​​the mud discharge pipe is greater than or equal to 90% and less than 100%.

[0106] The reserved space 218 between two adjacent sets of horizontal tubular sedimentation structures 210 has more intense gas-water agitation than inside the horizontal tubular sedimentation structure 210, which causes the mixed liquid on both sides of the inclined plate to rush to the middle of the inclined plate. That is, the middle and sides of the inclined plate form a micro-hydraulic circulation, which is conducive to the discharge of the adhering substances that are washed down into the interior of the inclined plate.

[0107] Specifically, the bubbles discharged from the air washing system form an "air cushion layer" at the bottom of the horizontal tubular sedimentation structure 210 (the space below the inclined plate). (The bubbles gather in the space below the inclined plate and then roll up from the edges of the inclined plate.) The resistance encountered by the bubbles at the bottom of the horizontal tubular sedimentation structure 210 is greater than the resistance encountered by the bubbles in the reserved space. This causes more bubbles to be discharged from the reserved spaces on both sides of the horizontal tubular sedimentation structure 210. In other words, the air-water agitation in the reserved space is more intense than inside the horizontal tubular sedimentation structure 210. This causes the liquid level inside the horizontal tubular sedimentation structure 210 to be lower than that in the reserved space. This promotes the flow of the mixed liquid in the reserved space into the interior of the horizontal tubular sedimentation structure 210. The liquid flows downward inside the horizontal tubular sedimentation structure 210, carrying out the sludge and detached attachments inside the horizontal tubular sedimentation structure 210. This achieves the effect of flushing out the attachments from inside the horizontal tubular sedimentation structure 210.

[0108] The above layout structure achieves both efficient sedimentation and effective cleaning in the sedimentation tank.

[0109] Example 5: Figure 21-25 As shown, the difference between this embodiment and embodiment 1 is that the sedimentation device 2 adopts multiple upward flow inclined plates 220, and a main water collection tank 6 and a branch water collection tank 61 are provided above the upward flow inclined plates 220; the sedimentation tank 1 has a sedimentation tank inlet 110 below the sedimentation device 2.

[0110] During the air-water backwashing process, the backwashing gas sequentially passes through the main air inlet pipe 410 and the branch air inlet pipe 420 of the sludge discharge pipe, entering the corresponding sludge discharge pipe 310. The gas is then ejected through perforations in the sludge discharge pipe 310, flushing and agitating the deposited sludge at the bottom of the tank, cleaning the dead zones of accumulated sludge, and causing the sludge to rise and mix with the water to form a mixed liquid. Simultaneously, the sludge floats to the surface and is guided by the guide plate 120 to flush away any deposits on the upward-flowing inclined plate 220. The mixed liquid and air bubbles work together to flush away the deposits on the upward-flowing inclined plate 220, thereby effectively improving the cleaning efficiency.

[0111] Multiple guide plates 120 are provided on the support frame. The guide plates 120 are located below the inclined plate body and their length direction is consistent with the inclined plate body. The guide plate 120 includes an arc-shaped section 121 and a straight section 122. The straight section 122 is vertically arranged. The arc-shaped section 121 protrudes upward toward the back side 222 of the inclined plate body, and the concave surface of the arc-shaped section 121 faces the front side 221 of the adjacent inclined plate body.

[0112] like Figure 25 As shown, mud and dirt usually adhere to the front surface 221 of the inclined plate. During the air-water flushing process, the gas floating below is guided by the guide plate 120 to form airflow a and airflow b to flush the mud and dirt on the front surfaces 221 of two adjacent inclined plates respectively.

[0113] Due to the Coanda effect (the effect of airflow adhering to the wall, when airflow passes over the surface of an object with little curvature, the path of the airflow is deflected along the surface of the object), airflow 1a directly washes away the mud and dirt on the front side 221 of the inclined plate.

[0114] Airflow 2b, guided by the guide plate 120, directly washes away the mud and dirt on the front side 221 of the other inclined plate.

[0115] After being rinsed on the front of the inclined plate, the two airflows continue to rise and collide with the back of the adjacent inclined plate. This promotes the vibration effect of the adjacent inclined plate and helps the mud and dirt on the front of the adjacent inclined plate to fall off. The airflow path between the two adjacent inclined plate bodies is S-shaped, which also increases the turbulence of the gas inside the upward flow inclined plate 220, which helps the mud and dirt inside to fall off as a whole and significantly improves the cleaning effect.

[0116] The guide plate 120 directly flushes the mud and dirt on the front of the inclined plate with gas, improving the flushing effect; at the same time, the guide plate 120 is located below the front of the inclined plate, reducing the impact on mud and dirt settling.

[0117] The above layout structure achieves both efficient sedimentation and effective cleaning in the sedimentation tank.

[0118] Example 6: As Figure 26-29 As shown, the difference between this embodiment and embodiment 2 is that the sedimentation device 2 adopts multiple upward flow inclined plates 220, and a main water collection tank 6 and a branch water collection tank 61 are provided above the upward flow inclined plates 220; the sedimentation tank 1 has a sedimentation tank inlet 110 below the sedimentation device 2.

[0119] When using the cleaning system for this sedimentation tank, first close the sludge discharge valve 311, then open the sludge discharge pipe air inlet valve 421. The air source enters the sludge discharge pipe 310 through the main air inlet pipe 410 and the branch air inlet pipe 420. The gas is then ejected through the perforations of the sludge discharge pipe 310. At the same time, the support frame air inlet valve 531 is opened, and the gas enters the support frame branch air inlet pipe 530 from the support frame main air inlet pipe 520, and is ejected from the support frame branch pipe air hole 512 through the support frame branch pipe 511.

[0120] The air bubbles discharged from the sludge discharge pipe 310 and the support frame 510 flush and agitate the deposited sludge at the bottom of the pool, washing away the dead zones of sludge accumulation and causing the sludge to rise and mix with the water to form a mixed liquid. The mixed liquid and air bubbles together flush away the deposits on the upward flow inclined plate 220, thereby effectively improving the cleaning efficiency.

[0121] Compared to a single sludge discharge pipe air washing system 4 or a support frame air washing system 5, the air bubbles discharged by the sludge discharge pipe 310 and the support frame 510 agitate the sludge in the sedimentation tank area and the deposits on the upward flow inclined plate 220, mixing the sludge with the water to form a mixed liquid. This mixed liquid has a better effect on flushing the upward flow inclined plate 220.

[0122] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A cleaning system for a sedimentation tank, comprising a sedimentation tank (1), wherein a sludge discharge unit (3) and a sedimentation device (2) are arranged sequentially from bottom to top in the sedimentation tank (1), the sedimentation device (2) comprising a plurality of parallel inclined plates, wherein a flow zone (216) and a sludge sliding zone (215) are formed between adjacent inclined plates, characterized in that, An air washing system is provided below the sedimentation device (2); The bottom of the sedimentation device (2) is provided with a support frame (510), and multiple guide plates (120) are provided on the support frame (510). The gas washing system can spray gas and flush the mud area (215) of the sedimentation device (2) through the guide plate (120) to achieve cleaning of the sedimentation device (2). The guide plate (120) includes an arc-shaped section (121) and a straight section (122), with the straight section (122) being vertically arranged; the convex surface of the arc-shaped section (121) faces the back (222) of the inclined plate body above, and the concave surface of the arc-shaped section (121) faces the front (221) of the inclined plate body of the adjacent inclined plate body.

2. The cleaning system for sedimentation tanks according to claim 1, characterized in that, The inclined plate adopts a horizontal tubular sedimentation structure (210), and there is a reserved space (218) between two adjacent horizontal tubular sedimentation structures (210). The horizontal tubular sedimentation structure (210) is composed of multiple wing plate units. Each wing plate unit includes a base plate (211), and multiple ribs (212) are fixed on the base plate (211). Wing plates (214) are fixed on the ribs (212) through insertion slots (213). The multiple wing plates (214) 14) When multiple wing plate units are assembled and arranged parallel to the length direction of the rib plate (212), the wing plate (214) of each wing plate unit is fixed on the bottom plate (211) of the adjacent wing plate unit, and a flow passage (216) is formed between the wing plate (214) and the bottom plate (211) of the adjacent wing plate unit; a mud slipping area (215) is formed between the free edge of the wing plate (214) and the bottom plate (211) of the wing plate unit where the wing plate (214) is located.

3. The cleaning system for sedimentation tanks according to claim 1, characterized in that, The inclined plate is an upward flow type inclined plate (220), and a main water collection tank (6) and a branch water collection tank (61) are provided above the upward flow type inclined plate (220); the sedimentation tank (1) has a sedimentation tank inlet (110) below the sedimentation device (2), and a flow zone (216) and a mud sliding zone (215) are formed between adjacent upward flow type inclined plates (220).

4. A cleaning system for a sedimentation tank according to claim 1, 2, or 3, characterized in that, The guide plate (120) is disposed below the inclined plate body of the inclined plate, and the length direction of the guide plate (120) is consistent with the inclined plate body.

5. A cleaning system for sedimentation tanks according to claim 1, characterized in that, The sludge discharge unit (3) includes multiple sludge discharge pipes (310), with a mud-sliding plate (320) arranged between two adjacent sludge discharge pipes (310). A sludge accumulation area (330) is formed between the sludge discharge pipe (310) and the adjacent mud-sliding plates (320) on both sides. Multiple perforations are provided on the sludge discharge pipe (310). One end of the sludge discharge pipe (310) extends into the sedimentation tank (1) and is closed at the end. The other end of the sludge discharge pipe (310) extends out of the outside of the sedimentation tank (1) and is equipped with a sludge discharge valve (311).

6. A cleaning system for a sedimentation tank according to claim 5, characterized in that, The air washing system includes a sludge discharge pipe air washing system (4), which includes a sludge discharge pipe main air inlet pipe (410). The sludge discharge pipe main air inlet pipe (410) is connected to the sludge discharge pipe (310) one by one through the sludge discharge pipe branch air inlet pipes (420). The sludge discharge pipe branch air inlet pipes (420) are also equipped with sludge discharge pipe air inlet valves (421).

7. A cleaning system for a sedimentation tank according to claim 2, characterized in that, Water baffles (550) are fixedly installed on the front and rear sides of the support frame (510) where the horizontal tubular sedimentation structure (210) is installed.

8. A cleaning system for a sedimentation tank according to claim 2, characterized in that, The rib (212) is divided into two side ribs (212-1) and a central rib (212-2) located in the middle of the base plate (211). Multiple side insertion slots (213-1) are provided on the side ribs (212-1), and a central insertion slot (213-2) is provided on the central rib (212-2). The central insertion slot (213-2) is higher than the side insertion slots (213-1). When the wing plate (214) is installed on the side ribs (212-1) and the central rib (212-2) respectively through the side insertion slots (213-1) and the central insertion slot (213-2), it is bent to form an arc-shaped wing plate (214').

9. A cleaning system for a sedimentation tank according to claim 2, characterized in that, The cross-section of the rib (212) is L-shaped or T-shaped. The rib (212) includes a fixed leaf plate (2121) and an insert leaf plate (2122). The folding angle Q between the insert leaf plate (2122) and the fixed leaf plate (2121) is between 90° and 180°, where 90° is taken as the endpoint and 180° is not taken as the endpoint.

10. A cleaning system for a sedimentation tank according to claim 5, characterized in that, The height of the sludge discharge pipe (310) is h1: the diameter of the sludge discharge pipe (310) is h2: the distance from the sludge discharge pipe (310) to the bottom of the sedimentation tank (1) is h3 = 3: 2:

1. The height of the sludge discharge pipe refers to the distance from the top of the sludge discharge pipe to the bottom of the tank; the diameter of the sludge discharge pipe is the diameter of the cross-section of the sludge discharge pipe; the distance from the sludge discharge pipe to the bottom of the tank is the distance from the bottom of the sludge discharge pipe to the bottom of the tank, and the ratio of the total perforation area of ​​the sludge discharge pipe (310) to the cross-sectional area of ​​the sludge discharge pipe (310) is greater than or equal to 90% and less than 100%.

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