Bucket-shaped inclined plate sedimentation tank

Abstract

The invention belongs to the technical field of solid-liquid separation, and particularly discloses a bucket-shaped inclined plate sedimentation tank. A water inlet pipe outlet of the sedimentation tank is positioned at the lower part of the tank body; at least two bucket-shaped inclined plates are fixedly connected in series between an outlet of the water inlet pipe and an inlet of the water outlet pipe from bottom to top in the pool body, each bucket-shaped inclined plate is an inverted cone shell with an upper opening, each bucket-shaped inclined plate comprises a bucket wall and a bucket bottom opening, the bucket bottom openings are formed in the bottom ends of the bucket-shaped inclined plates, and a plurality of bucket wall openings extending up and down are formed in the bucket walls at intervals in the circumferential direction; the outer edge of the top end of the hopper wall is fixedly connected with the tank body; a sludge discharge pipe is arranged at the bottom end of the tank body. The bucket-shaped inclined plates are connected in series in the tank body at intervals from bottom to top, and the bucket bottom openings and the bucket wall openings are formed in the bucket-shaped inclined plates, so that the effective sedimentation area can be remarkably increased, the sedimentation effect can be improved, sludge can be conveniently discharged in a concentrated manner, and the sedimentation tank has the characteristics of simple structure, high sedimentation efficiency, good sludge discharge effect and difficulty in blockage.

Description

Technical Field

[0001] The present invention belongs to the technical field of solid-liquid separation, and particularly relates to a hopper-shaped inclined plate sedimentation tank with a simple structure, high sedimentation efficiency, good sludge discharge effect and not easy to be blocked. Background Art

[0002] In the water treatment process, the process of separating suspended particles from water under the action of gravity is called sedimentation. When the density of the particles is greater than the density of water, the particles sink; on the contrary, when the density of the particles is less than the density of water, the particles float.

[0003] From the analysis of the particle sedimentation process in a horizontal flow sedimentation tank and the ideal sedimentation principle, it can be seen that the sedimentation removal rate of suspended particles is only related to the sedimentation area of the sedimentation tank and has nothing to do with the tank depth. Therefore, under the condition that the volume of the sedimentation tank is certain, the shallower the tank depth, the larger the sedimentation area, and the higher the removal rate of suspended particles. This is the "shallow tank sedimentation principle". For this reason, dividing the sedimentation tank into multiple layers can double the treatment capacity of the sedimentation tank under the condition of a certain floor area. However, it is difficult to discharge the sediment in the traditional multi-layer sedimentation tank. To solve the problem of sludge discharge, generally, the traditional horizontal baffle is changed to an inclined baffle at present, and a sludge discharge interval is reserved, which becomes an inclined plate sedimentation tank. And using tubular components (forming a hexagonal or quadrilateral cross-section) to replace the inclined plate is an inclined tube sedimentation tank.

[0004] Since the inclined plate (inclined tube) filler in the inclined plate / inclined tube sedimentation tank must be installed obliquely, a part of the sedimentation tank cannot be installed with the inclined plate (inclined tube) filler. Especially in a circular tank body, the effective installation space of the inclined plate (inclined tube) filler is smaller. Moreover, the existing inclined plate (inclined tube) fillers are mostly installed side by side, there is a certain short circuit, and the solid-liquid separation effect cannot be superimposed. In addition, due to the dispersed sludge discharge at the bottom of the inclined plate (inclined tube) filler, it is difficult to gather the sludge discharge of the inclined plate (inclined tube) sedimentation tank.

[0005] In the prior art, in order to solve the deficiencies existing in the inclined plates or inclined tubes in the sedimentation tank, there is a solution of adding a flocculant to the sedimentation tank to promote the combination of suspended solids in the turbid water and accelerate sedimentation; however, the continuous use of the flocculant will bring higher chemical costs, and improper control of the flocculant dosage will also affect the subsequent treatment process and pose potential hazards to the environment and the health of operators. In addition, there is also a method of arranging multiple layers of inclined tubes or inclined plates staggered in the sedimentation tank to increase the sedimentation area and shorten the sinking distance of particles, thereby improving the overall sedimentation efficiency; however, the staggered arrangement of multiple layers of inclined tubes or inclined plates is not only difficult to lay out, but also prone to blockage problems after a period of use due to the small distance between the multiple layers of inclined tubes or inclined plates, which will increase the difficulty and cost of cleaning and maintenance. In addition, there is also a method of setting longitudinal diversion (or partition) walls in the sedimentation tank to make the water flow in the tank more stable, effectively avoiding adverse water flow phenomena such as short circuit flow, deviation flow, and density flow, so as to reduce the interference of water flow on particle sedimentation and improve the sedimentation efficiency; however, due to the design and construction of the diversion (or partition) walls requiring precise calculation and careful construction by professional technicians, unreasonable design or poor construction quality may exacerbate water flow disorder, and adding the diversion (or partition) walls will divide the sedimentation tank into multiple sedimentation chambers, thus increasing the difficulty of sediment cleaning. Summary of the Invention

[0006] In order to solve the problems mentioned in the above background art, the present invention provides a bucket-shaped inclined plate sedimentation tank with a simple structure, high sedimentation efficiency, good sludge discharge effect, and not easy to be blocked.

[0007] The bucket-shaped inclined plate sedimentation tank of the present invention is realized as follows: it includes a tank body, a water inlet pipe, and a water outlet pipe. The outlet of the water inlet pipe is located at the lower part of the tank body, and the inlet of the water outlet pipe is located at the upper part of the tank body; at least two bucket-shaped inclined plates are fixedly connected in series from bottom to top between the outlet of the water inlet pipe and the inlet of the water outlet pipe in the tank body. The bucket-shaped inclined plate is an inverted cone-shaped shell with an open upper part. The bucket-shaped inclined plate includes a bucket wall and a bucket bottom opening. The bucket bottom opening is arranged at the bottom end of the bucket-shaped inclined plate. A plurality of vertically extending bucket wall openings are arranged at intervals in the circumferential direction of the bucket wall. The outer edge of the top end of the bucket wall is fixedly connected to the tank body, and a sludge discharge pipe is also arranged at the bottom end of the tank body.

[0008] Further, the bucket-shaped inclined plate is an inverted conical shell or an inverted pyramidal shell, and the bucket wall forms a slope greater than 30° and less than 70° with the horizontal plane.

[0009] Further, the bucket wall opening is a straight strip opening consistent with the sliding direction of the sludge on the inner side of the bucket wall, and the total opening area of the bucket wall openings on each bucket-shaped inclined plate is at least 3 times larger than the opening area of the bucket bottom opening.

[0010] Further, the bucket wall openings on the adjacent bucket-shaped inclined plates arranged at intervals from bottom to top in the tank body are arranged in a staggered manner.

[0011] Further, a flanging protruding inwardly toward the inner side of the hopper-shaped inclined plate is provided at the edge of the hopper wall opening. The bottom end of the hopper bottom opening of the upper-layer hopper-shaped inclined plate in the tank body is lower than the top end of the hopper wall opening of the adjacent lower-layer hopper-shaped inclined plate, and the bottom end of the hopper bottom opening of the bottom-layer hopper-shaped inclined plate in the tank body is higher than the inlet of the sludge discharge pipe.

[0012] Further, a sludge guiding pipe extending downward is fixedly provided at the bottom end of the hopper bottom opening of the hopper-shaped inclined plate. The bottom end of the sludge guiding pipe of the upper-layer hopper-shaped inclined plate in the tank body is lower than the bottom end of the hopper wall opening of the adjacent lower-layer hopper-shaped inclined plate, and the bottom end of the sludge guiding pipe of the bottom-layer hopper-shaped inclined plate in the tank body is lower than the opening of the water inlet pipe.

[0013] Further, a hopper edge extending horizontally outward is further provided at the top end of the hopper-shaped inclined plate. A plurality of support plates are spaced apart from bottom to top on the inner wall of the tank body, and the hopper edge of the hopper-shaped inclined plate is fixed on the corresponding support plate.

[0014] Further, an overflow weir is provided between the top-layer hopper-shaped inclined plate and the water outlet pipe in the tank body.

[0015] Further, a conical precipitation part is provided below the water inlet pipe of the tank body, and a sludge discharge pipe and a sludge discharge valve are provided at the bottom of the conical precipitation part.

[0016] The present invention has the following beneficial effects: 1. By optimizing the filler structure in the sedimentation tank, the inverted conical hopper-shaped inclined plates are arranged in series and stacked in the tank body, effectively utilizing the vertical space of the sedimentation tank, realizing the superposition of multi-layer sedimentation areas under the same floor area, thereby increasing the effective sedimentation area; and by staggeredly arranging the hopper wall openings at the hopper walls of the hopper-shaped inclined plates to form a zigzag sedimentation path, not only can the flow pattern of the water flow in the tank be more reasonable, but also the flow velocity of the turbid water can be slowed down, and the sedimentation distance of the particles in the turbid water can be extended, thereby reducing the phenomenon of water flow short circuit, and enabling the solid-liquid separation effect to be superimposed layer by layer. Therefore, the sedimentation efficiency can be significantly improved compared with the traditional parallel inclined plate structure.

[0017] 2. The hopper wall opening of the present invention adopts a straight strip opening consistent with the sludge sliding direction, which can slow down and even avoid the disturbance of the upward flowing turbid water to the sliding sludge; and combined with the relative position design of the hopper bottom opening and the hopper wall opening of the adjacent hopper-shaped inclined plates, and making the total opening area of the hopper wall openings on each hopper-shaped inclined plate greater than the opening area of the hopper bottom opening by at least 3 times, thereby forming a good sludge discharge gradient, which can not only facilitate the sliding and concentration of the sludge, solve the problem that the sludge discharge of the traditional inclined plate (inclined tube) sedimentation tank is dispersed and difficult to gather, but also reduce the amount of water passing through the hopper bottom opening, further slowing down the disturbance of the turbid water to the sludge, not only can improve the solid-liquid separation effect, but also can avoid the blockage caused by sludge accumulation.

[0018] 3. The inverted cone shell structure with an open top is adopted for the bucket-shaped inclined plate of the present invention, breaking through the limitation that traditional inclined plates / inclined tubes need to be installed obliquely. It is not only applicable to rectangular sedimentation tanks, especially circular sedimentation tanks, enhancing the adaptability to sedimentation tanks; moreover, the space utilization rate is significantly improved compared with traditional inclined plate / inclined tube sedimentation tanks, and the number of layers of the bucket-shaped inclined plate can be flexibly adjusted according to the treatment volume and the properties of the treatment solution, improving the flexibility of application.

[0019] 4. Through the unique design of the bucket-shaped inclined plate of the present invention, compared with the traditional multi-layer inclined tubes / inclined plates arranged in a staggered manner, its internal space is larger, and it is not easy to have problems of blockage caused by too small distance and accumulation of sediment impurities, reducing the difficulty and cost of cleaning and maintenance, and ensuring that the sedimentation tank can operate stably for a long time.

[0020] To sum up, the present invention has the characteristics of simple structure, high sedimentation efficiency, strong adaptability, and good sludge discharge effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is one of the structural schematic diagrams of the present invention; Figure 2 is the structural schematic diagram of the bucket-shaped inclined plate of the present invention; Figure 3 is Figure 2 the top view of Figure 4 is the second structural schematic diagram of the present invention; In the figure, 1 - tank body, 2 - inlet pipe, 3 - outlet pipe, 4 - bucket-shaped inclined plate, 41 - bucket wall, 42 - bottom opening of the bucket, 43 - opening on the bucket wall, 44 - sludge guiding pipe, 45 - bucket edge, 5 - sludge discharge pipe, 6 - support plate, 7 - overflow weir, 8 - conical sedimentation part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present invention will be further described below in conjunction with the drawings and embodiments, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention fall within the protection scope of the present invention.

[0023] As Figures 1 to 4 shown, the present invention includes a tank body 1, an inlet pipe 2, and an outlet pipe 3. The outlet of the inlet pipe 2 is located at the lower part of the tank body 1, and the inlet of the outlet pipe 3 is located at the upper part of the tank body 1; at least two bucket-shaped inclined plates 4 are fixedly connected in series from bottom to top between the outlet of the inlet pipe 2 and the inlet of the outlet pipe 3 inside the tank body 1. The bucket-shaped inclined plate 4 is an inverted cone shell with an open top. The bucket-shaped inclined plate 4 includes a bucket wall 41 and a bottom opening 42 of the bucket. The bottom opening 42 of the bucket is arranged at the bottom end of the bucket-shaped inclined plate 4. A plurality of openings 43 extending up and down are arranged at intervals in the circumferential direction of the bucket wall 41. The outer edge of the top end of the bucket wall 41 is fixedly connected to the tank body 1. A sludge discharge pipe 5 is also arranged at the bottom end of the tank body 1.

[0024] The hopper-shaped inclined plate 4 is an inverted conical shell or an inverted pyramidal shell, and the hopper wall 41 forms a slope with the horizontal plane that is greater than 30° and less than 70°.

[0025] The hopper wall opening 43 is a straight strip opening that is consistent with the sludge sliding direction on the inner side of the hopper wall 41, and the total opening area of the hopper wall openings 43 on the hopper-shaped inclined plate 4 is at least 3 times greater than the opening area of the hopper bottom opening 42.

[0026] The hopper wall openings 43 on adjacent hopper-shaped inclined plates 4 arranged at intervals from bottom to top in the pool body 1 are arranged in a staggered manner.

[0027] The edge of the hopper wall opening 43 is provided with a flanging that protrudes inwardly towards the hopper-shaped inclined plate 4. The bottom end of the hopper bottom opening 42 of the upper-layer hopper-shaped inclined plate 4 in the pool body 1 is lower than the top end of the hopper wall opening 43 of the adjacent lower-layer hopper-shaped inclined plate 4, and the bottom end of the hopper bottom opening 42 of the bottom-layer hopper-shaped inclined plate 4 in the pool body 1 is higher than the inlet of the sludge discharge pipe 5.

[0028] The bottom end of the hopper bottom opening 42 of the hopper-shaped inclined plate 4 is fixedly provided with a mud guiding pipe 44 extending downward. The bottom end of the mud guiding pipe 44 of the upper-layer hopper-shaped inclined plate 4 in the pool body 1 is lower than the bottom end of the hopper wall opening 43 of the adjacent lower-layer hopper-shaped inclined plate 4, and the bottom end of the mud guiding pipe 44 of the bottom-layer hopper-shaped inclined plate 4 in the pool body 1 is lower than the opening of the water inlet pipe 2.

[0029] The top end of the hopper-shaped inclined plate 4 is further provided with a hopper edge 45 extending horizontally outward. A plurality of support plates 6 are arranged at intervals from bottom to top on the inner wall of the pool body 1, and the hopper edge 45 of the hopper-shaped inclined plate 4 is fixed on the corresponding support plate 6.

[0030] An overflow weir 7 is arranged between the top-layer hopper-shaped inclined plate 4 and the water outlet pipe 3 in the pool body 1.

[0031] A conical precipitation part 8 is arranged below the water inlet pipe 2 in the pool body 1, and a sludge discharge pipe 5 and a sludge discharge valve are arranged at the bottom of the conical precipitation part 8.

[0032] The working principle and working process of the present invention: As Figures 1 to 3 shown, according to the turbidity treatment capacity and the nature of the turbid water of the sedimentation tank, a plurality of support plates 6 are arranged at intervals from bottom to top on the inner wall of the pool body 1, and then the processed hopper-shaped inclined plates 4 are fixedly arranged on the support plates 6 in the pool body 1 layer by layer, so that the hopper-shaped inclined plates 4 in the pool body 1 form a series of stacked structures.

[0033] During operation, the turbid water enters the tank body 1 from the water inlet pipe 2. The turbid water sequentially passes through the orifices 43 of the bucket walls of each bucket-shaped inclined plate 4 from bottom to top (a small amount passes upward through the bottom orifice 42 of the bucket). The suspended solids in the turbid water gradually precipitate onto the bucket walls 41 of each layer of bucket-shaped inclined plates 4 and slide down to the bottom orifice 42 under the action of gravity. Then, they gradually fall through the bottom orifice 42 until they fall into the conical sedimentation part 8. Finally, after a certain period of sedimentation of the sludge in the conical sedimentation part 8, the sludge discharge valve at the bottom of the conical sedimentation part 8 is opened, and the sediment is discharged from the sludge discharge pipe 5. The supernatant that passes through each layer of bucket-shaped inclined plates 4 finally overflows from the overflow weir 7 and is discharged from the water outlet pipe 3.

[0034] The above description is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A hopper-shaped inclined plate sedimentation tank, comprising a tank body (1), a water inlet pipe (2), and a water outlet pipe (3). The outlet of the water inlet pipe (2) is located at the lower part of the tank body (1), and the inlet of the water outlet pipe (3) is located at the upper part of the tank body (1). It is characterized in that: Inside the pool body (1), at least two bucket-shaped inclined plates (4) are fixedly connected in series from bottom to top between the outlet of the water inlet pipe (2) and the inlet of the water outlet pipe (3). The bucket-shaped inclined plate (4) is an inverted cone-shaped shell with an open upper part. The bucket-shaped inclined plate (4) includes a bucket wall (41) and a bucket bottom opening (42). The bucket bottom opening (42) is arranged at the bottom end of the bucket-shaped inclined plate (4). A number of vertically extending bucket wall openings (43) are arranged at intervals in the circumferential direction of the bucket wall (41). The outer edge of the top end of the bucket wall (41) is fixedly connected to the pool body (1). A sludge discharge pipe (5) is also arranged at the bottom end of the pool body (1).

2. The hopper-shaped inclined plate sedimentation tank according to claim 1, wherein: The bucket-shaped inclined plate (4) is an inverted conical shell or an inverted pyramid-shaped shell. The bucket wall (41) forms a slope greater than 30° and less than 70° with the horizontal plane.

3. The hopper-shaped inclined plate sedimentation tank according to claim 1, characterized in that: The bucket wall opening (43) is a straight strip opening consistent with the sliding direction of the sludge inside the bucket wall (41). The total opening area of each bucket wall opening (43) on the bucket-shaped inclined plate (4) is at least 3 times larger than the opening area of the bucket bottom opening (42).

4. The hopper-shaped inclined plate sedimentation tank according to claim 3, characterized in that: The bucket wall openings (43) on the adjacent bucket-shaped inclined plates (4) arranged at intervals from bottom to top inside the pool body (1) are arranged in a staggered manner.

5. The hopper-shaped inclined plate sedimentation tank according to claim 3, characterized in that: A flanging protruding inward from the bucket-shaped inclined plate (4) is arranged at the edge of the bucket wall opening (43). The bottom end of the bucket bottom opening (42) of the upper-layer bucket-shaped inclined plate (4) inside the pool body (1) is lower than the top end of the bucket wall opening (43) of the adjacent lower-layer bucket-shaped inclined plate (4). The bottom end of the bucket bottom opening (42) of the bottom-layer bucket-shaped inclined plate (4) inside the pool body (1) is higher than the inlet of the sludge discharge pipe (5).

6. The hopper-shaped inclined plate sedimentation tank according to claim 3, wherein: A sludge guiding pipe (44) extending downward is fixedly arranged at the bottom end of the bucket bottom opening (42) of the bucket-shaped inclined plate (4). The bottom end of the sludge guiding pipe (44) of the upper-layer bucket-shaped inclined plate (4) inside the pool body (1) is lower than the bottom end of the bucket wall opening (43) of the adjacent lower-layer bucket-shaped inclined plate (4). The bottom end of the sludge guiding pipe (44) of the bottom-layer bucket-shaped inclined plate (4) inside the pool body (1) is lower than the opening of the water inlet pipe (2).

7. The hopper-shaped inclined plate sedimentation tank according to any one of claims 1 to 6, characterized in that: An outward horizontally extending bucket edge (45) is also arranged at the top end of the bucket-shaped inclined plate (4). A number of support plates (6) are arranged at intervals from bottom to top on the inner wall of the pool body (1). The bucket edge (45) of the bucket-shaped inclined plate (4) is fixed on the corresponding support plate (6).

8. The hopper-shaped inclined plate sedimentation tank according to any one of claims 1 to 6, characterized in that: An overflow weir (7) is arranged between the top-layer bucket-shaped inclined plate (4) and the water outlet pipe (3) inside the pool body (1).

9. The hopper-shaped inclined plate sedimentation tank according to any one of claims 1 to 6, characterized in that: A conical precipitation part (8) is arranged below the water inlet pipe (2) in the pool body (1). A sludge discharge pipe (5) and a sludge discharge valve are arranged at the bottom of the conical precipitation part (8).

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