A positive taper high-efficiency separation settling tank

Abstract

A positive cone high-efficiency separation sedimentation tank belongs to the technical field of solid-liquid separation equipment. In view of the problems of high investment, easy blockage, low separation efficiency and material short circuit flow of the traditional inverted cone sedimentation tank, a high-efficiency separation scheme based on the synergistic effect of positive cone structure and built-in settling pipe is proposed. The sedimentation tank comprises a cylindrical tank body, a central feeding cylinder, a positive cone body with a pointed end upward, a plurality of settling pipes, a top overflow outlet and a bottom underflow outlet; the positive cone body is installed at the bottom of the tank body, and the included angle between the generatrix and the bottom surface is 30-70 degrees; the settling pipe is arranged between the inner wall of the tank body and the central feeding cylinder, and the height thereof is between the upper and lower ends of the central feeding cylinder; the underflow outlet is uniformly distributed along the bottom annular area and is controlled by a program. The structure makes the material flow through the cone top and then stably settle in the settling pipe, effectively avoiding short circuit flow and improving separation efficiency, and at the same time, large particles are dispersed in the annular area, which significantly improves the discharge smoothness, and is suitable for high-efficiency solid-liquid separation in chemical industry, mining and environmental protection industry.

Description

Technical Field

[0001] This utility model relates to the field of solid-liquid separation equipment technology, specifically a positive cone high-efficiency separation sedimentation tank. Background Technology

[0002] In the production processes of many industries such as chemical, mining, and environmental protection, solid-liquid separation is a crucial process. As the core equipment for achieving solid-liquid separation, the separation efficiency of the settling tank directly affects the smoothness of subsequent production processes and product quality.

[0003] Existing settling tanks mostly adopt the traditional inverted cone structure design. Inverted cone settling tanks are relatively tall, requiring higher standards for the foundation and support structures, thus necessitating significant investment. Conical settling tanks, on the other hand, have a simpler structure, reducing investment by more than half. Compared to conical structures, the volume of the cone section in an inverted cone structure is only half that of a conical structure, resulting in a 50% reduction in cone volumetric efficiency. When there are many large particles in the slurry, the bottom of an inverted cone settling tank is easily clogged by these particles, hindering production. Conical settling tanks, however, disperse large particles into the annular space at the bottom, preventing blockage of the underflow discharge in a short time.

[0004] The conical settling tank has a simpler structural design, better structural stability, and is less prone to safety accidents such as tank collapse. Multiple underflow outlets are controlled by a programmed system to ensure uniform underflow discharge.

[0005] To address the aforementioned issues, there is an urgent need for a high-efficiency settling tank that can optimize particle settling paths, enhance separation effects, and improve discharge smoothness, in order to meet the high-performance requirements of industrial production for solid-liquid separation equipment. Utility Model Content

[0006] The purpose of this invention is to provide a novel settling tank that features low investment, high separation efficiency, minimal material blockage during discharge, and prevents materials from following short-circuit flows. This invention optimizes the tank structure and internal component layout to achieve rapid settling and efficient separation of solid particles, while ensuring smooth underflow discharge, thereby improving equipment operational stability and production efficiency.

[0007] To achieve the above objectives, the technical solution of this utility model is: a positive cone high-efficiency separation sedimentation tank, comprising a tank body, a central feeding cylinder, a positive cone with its tip pointing upwards, sedimentation pipes, an overflow outlet, and a bottom flow outlet. The tank body is a hollow cylinder, the positive cone is installed at the bottom of the tank body, a central feeding cylinder is installed at the center of the top plate of the tank body, a number of sedimentation pipes are fixed between the inner wall of the tank body and the outer wall of the central feeding cylinder, a number of overflow outlets are installed at the top of the outer wall of the tank body, and a number of bottom flow outlets are installed at the bottom of the outer wall of the tank body. The lowest point of the settling pipe is higher than the lowest point of the central discharge cylinder, and the highest point of the settling pipe is lower than the highest point of the central discharge cylinder; the angle α between the generatrix of the right cone and the bottom surface of the tank is 30°-70°.

[0008] The cross-section of the settling pipe can be circular, square, or polygonal, or it can be other shapes.

[0009] The angle between the centerline of the settling pipe and the centerline of the central discharge cylinder is 0°-60°.

[0010] This utility model has the following advantages: High separation efficiency: By setting several settling tubes inside the tank, the slurry settles stably in each settling tube without being disturbed by the lateral flow. At the same time, the flocs descending in the settling tubes hinder the rising particles, thus improving the settling efficiency.

[0011] Low investment and high safety: The positive cone settling tank has a simple structure, saves investment, has a stable structure, and has higher safety.

[0012] Smooth discharge: The conical settling tank allows large particles to disperse into the annular area at the bottom, making the bottom outlet less prone to clogging and ensuring smoother discharge.

[0013] Stable operation: The central installation design of the central feed cylinder and the height layout of the settling pipe avoid material short-flow phenomenon and ensure that the material can fully participate in the settling and separation; the overflow outlet is evenly distributed along the top of the tank, which ensures the stability of the clarified liquid discharge and makes the overall operation of the equipment more stable and reliable.

[0014] 5. High applicability: The cross-sectional shape and inclination angle of the settling pipe can be flexibly adjusted according to the characteristics of the material being processed, which can adapt to the material processing needs of different particle sizes and concentrations. It is suitable for multiple industries such as chemical, mining, and environmental protection, and has a wide range of application prospects. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front elevation cross-sectional structure of this utility model; Figure 2 for Figure 1 A schematic diagram of the structure along direction A; Figure 3 for Figure 1 A schematic diagram of the BB cross-sectional structure; In the diagram: 1-tank, 2-central discharge cylinder, 3-positive cone, 4-sinking pipe, 5-overflow outlet, 6-underflow outlet. Detailed Implementation Example 1

[0016] like Figure 1 ,like Figure 2 and Figure 3As shown, this utility model provides a technical solution: a high-efficiency conical separation settling tank, including a tank body 1, a central discharge cylinder 2, a conical body 3 (a cone-shaped structure with the tip pointing upwards), a settling pipe 4, an overflow outlet 5, and an underflow outlet 6. The tank body 1 is made of carbon steel and is cylindrical, with a diameter of 10m and a height of 12m, ensuring sufficient separation space. The conical body 3 is welded to the bottom of the tank body 1. The material of the conical body 3 is the same as that of the tank body 1. The angle α between the generatrix of the conical body 3 and the bottom of the tank body 1 is set to 52°. This angle can ensure that the solid particles slide down smoothly while taking into account the utilization rate of the tank space and the manufacturing cost.

[0017] A central discharge cylinder 2, with a diameter of 1.0m, is welded to the center of the top plate of the tank 1. Its lower end extends to the top of the conical section 3 inside the tank 1, allowing material to directly enter the tank 1 and diffuse from the center towards the tank wall along the bottom of the settling pipes 4. Several settling pipes 4 (such as...) are installed between the central cylinder and the central discharge cylinder 2 within the tank 1. Figure 3 (As shown, there are multiple) Settling pipes 4 are made of carbon steel, with a circular cross-section, a diameter of 0.6m, and a length of 2m. Several settling pipes 4 are installed side by side, and the center lines of all settling pipes 4 are parallel to the center line of the central discharge cylinder 2. The lowest point of the settling pipe 4 is 0.2m higher than the lowest point of the central discharge cylinder 2.

[0018] Two overflow outlets 5, each with a diameter of 0.3m, are evenly welded along the circumference of the top of the cylinder outside the tank 1. These outlets connect to the clarified liquid area inside the tank 1 to ensure uniform discharge of the clarified liquid. Eight underflow outlets 6, each with a diameter of 0.15m, are welded to the bottom of the cylinder outside the tank 1, corresponding to the bottom area of ​​the right cone 3. Control valves are installed at each underflow outlet 6. The eight underflow outlets 6 are controlled by a programmable controller to ensure uniform discharge from all eight outlets.

[0019] The working principle of this embodiment is as follows: The solid-liquid mixture to be separated (such as slurry) is continuously fed into the tank 1 through the central feed cylinder 2. After the material is discharged from the lower end of the central feed cylinder 2, it first impacts the top of the positive cone and then diffuses radially outward. During the diffusion process, the diffused rising material (including floating matter) enters several vertically arranged settling pipes 4. The solid particles in the rising material settle stably under the action of gravity, forming a clear liquid at the top of the settling pipes 4. Since the bottom of the tank 1 is provided with a positive cone 3, the solid particles that have settled to the bottom are guided by the positive cone 3 to converge in a ring at the bottom and are finally discharged through 8 underflow outlets 6. The clarified liquid after sufficient settling rises to the top of the tank 1 and is discharged through the overflow outlets 5 distributed along the circumference, completing the solid-liquid separation process.

[0020] In this embodiment, through the synergistic effect of the positive cone 3 and the settling pipe 4, the solid-liquid separation efficiency is increased by more than 30% compared with the traditional settling tank (the same specification inverted cone settling tank), the underflow is discharged smoothly, there is no obvious particle accumulation, and the stability of continuous operation of the equipment is significantly improved. Example 2

[0021] The difference between this embodiment and Embodiment 1 is that the angle α between the generatrix of the right cone 3 and the bottom of the tank 1 is 30°. In this configuration, the diameter of the tank 1 remains 10m, but the total height is adjusted to 13.2m to maintain effective settling space. Due to the reduced cone angle, the radial width of the bottom annular collection area increases from 1.2m to 2.1m, allowing solid particles to slide down a gentler slope and further disperse over a wider area. Correspondingly, the number of underflow outlets 6 increases to 10, evenly distributed along the annular area, and their opening and closing are coordinated by a program controller or manual intervention to ensure no local accumulation of large particles during discharge. This structure is particularly suitable for processing high-concentration slurries containing a large number of coarse particles (e.g., particles larger than 1mm). While ensuring absolutely unobstructed discharge, the solid-liquid separation efficiency is still significantly improved compared to traditional inverted cone settling tanks.

[0022] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-efficiency conical separation settling tank, comprising a tank body (1), a central discharge cylinder (2), a conical body with its tip pointing upwards (3), a settling pipe (4), an overflow outlet (5), and an underflow outlet (6), characterized in that: The tank (1) is a hollow cylinder. The positive cone (3) is installed at the bottom of the tank (1). A central feed cylinder (2) is installed at the center of the top plate of the tank (1). Several settling pipes (4) are fixed between the inner wall of the tank (1) and the outer wall of the central feed cylinder (2). Several overflow outlets (5) are installed at the top of the outer wall of the tank (1). Several underflow outlets (6) are installed at the bottom of the outer wall of the tank (1). The lowest point of the settling pipe (4) is higher than the lowest point of the central feed cylinder (2), and the highest point of the settling pipe (4) is lower than the highest point of the central feed cylinder (2); the angle α between the generatrix of the positive cone (3) and the bottom surface of the tank (1) is 30°-70°.

2. The high-efficiency conical separation sedimentation tank according to claim 1, characterized in that: The cross-section of the settling pipe (4) is circular or polygonal.

3. The high-efficiency conical separation sedimentation tank according to claim 1, characterized in that: The angle between the centerline of the settling pipe (4) and the centerline of the central feed cylinder (2) is 0°-60°.

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