A lateral flow spin-decentral tilting-bucket sedimentation tank

Abstract

The utility model discloses a lateral flow self-rotary eccentric inclined plate sedimentation tank relates to sewage treatment equipment field. A lateral flow self-rotary eccentric inclined plate sedimentation tank, including sedimentation tank body, eccentric rotation inclined plate area, eccentric rotation inclined plate device, water inlet structure, water outlet structure, sludge pump and sludge collecting hopper. The utility model adopts a lateral flow eccentric rotation inclined plate device, and the sludge formed by the particle in water and flocculating material can generate the rotation moment of force of the feature of uneven gravity distribution on the rotation inclined plate, and can rotate regularly, thereby successfully settling sludge without the restriction of the inclination angle, improving the sedimentation efficiency, and avoiding the occurrence of the traditional inclined plate sludge blockage phenomenon.

Description

Technical Field

[0001] This utility model relates to a sedimentation tank device, a lateral flow self-rotating eccentric inclined plate sedimentation tank, and relates to the field of sewage treatment equipment. Background Technology

[0002] An inclined plate sedimentation tank is a sedimentation tank with inclined plates within its sedimentation zone. In advanced water treatment processes, inclined plate sedimentation tanks are frequently used as the final treatment unit. Utilizing the theory of "shallow sedimentation," fine particles easily settle on the inclined plates, thus improving the quality of the effluent. Based on the relative directions of water flow and particle movement, inclined plate sedimentation tanks can be classified into three different separation methods: co-current flow, counter-current flow, and lateral / horizontal flow.

[0003] Lateral flow / horizontal flow sedimentation tanks are important water purification equipment, and their performance directly affects the effluent quality of wastewater treatment plants. In recent years, with the continuous advancement of water treatment technology, the lateral flow inverted V / A type has gradually been widely used in wastewater treatment plant sedimentation tanks due to its unique structure and excellent performance. For example, utility model patent application number CN201521007271.6 discloses a horizontal flow inclined plate inverted V purification device and a sedimentation tank with the purification device. Existing lateral flow sedimentation inclined plate purification devices generally adopt multiple inclined plates stacked together. However, in practical applications, due to the small spacing between the plates, when treating high concentrations of suspended solids, the phenomenon of sludge having difficulty sliding down and clogging the inclined plates still frequently occurs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a lateral flow self-rotating eccentric inclined plate sedimentation tank.

[0005] The objective of this utility model can be achieved through the following measures.

[0006] A lateral flow self-rotating eccentric inclined plate sedimentation tank includes a sedimentation tank body, an eccentric rotating inclined plate zone, an eccentric rotating inclined plate device, an inlet structure, an outlet structure, a sludge pump, and a sludge collection hopper. The sedimentation tank body has a cuboid structure and includes a buffer inlet zone and a sedimentation zone. The buffer inlet zone is located on one side of the inlet structure, and the sedimentation zone is located between the inlet structure and the outlet structure. The eccentric rotating inclined plate zone is positioned above the sedimentation zone, and the sludge pump and sludge collection hopper are located at the bottom of the sedimentation zone.

[0007] Furthermore, the eccentric rotating inclined plate area is composed of several eccentric rotating inclined plate devices. Each eccentric rotating inclined plate device consists of a rotating main shaft and a rotating inclined plate. The rotating inclined plate is tangent to the rotating main shaft, and the tangent line lies on one of the long sides of the rotating inclined plate, forming an eccentric structure. Centered on the axis of the rotating main shaft, the rotating inclined plates are fixed in a circular array on the rotating main shaft, with 6 to 10 plates of equal length. The length of the rotating inclined plate is shorter than the length of the rotating main shaft, and the ratio of the width of the rotating inclined plate to the diameter of the rotating main shaft is 15:1 to 20:1.

[0008] Furthermore, the eccentric rotating inclined plate area consists of several horizontally placed eccentric rotating inclined plate devices. The circumscribed cylinders formed by the eccentric rotating inclined plate devices are arranged in a closely packed planar circular pattern. The two ends of the rotating main shaft are placed in fixed sleeves in the structural frame, and the rotating inclined plates can rotate freely around the rotating main shaft at their placement points. During operation, water enters and exits along the direction of the rotating main shaft.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] Compared to traditional side-flow inclined plate sedimentation tanks, this invention can resolve the contradiction between the inclination angle and sedimentation efficiency. Traditional side-flow inclined plate sedimentation tanks typically have an inclination angle of 55–70°. If the inclination angle is too small, sludge will not easily slide down and will accumulate on the inclined plate, causing blockage. If the inclination angle is too large, the inclined plate will not function effectively and will not achieve a good sedimentation effect.

[0011] 1. The rotating inclined plate structure of this utility model is no longer limited by the angle of the lateral flow inclined plate. The sludge settles on the horizontally placed inclined plate, which is closer to the scenario described by the "shallow pool theory". It can not only ensure the sedimentation effect, but also solve the problem of sludge settling.

[0012] 2. The braking factor of the rotating inclined plate used in this utility model is that the torque around the axis generated by the weight difference of the sedimented sludge on the left and right sides is greater than the torque around the axis generated by the friction between the shaft and the bushing. Therefore, the rotation period of the rotating inclined plate can be limited by controlling the magnitude of the friction force, and a more efficient method can be selected for different sewage conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a side-flow self-rotating eccentric inclined plate sedimentation tank according to the present invention.

[0014] Figure 2 This is a schematic diagram of an eccentric rotating inclined plate device.

[0015] Figure 3 This is the left view of the eccentric rotating inclined plate device.

[0016] Figure 4A schematic diagram of the circumscribed circle of the eccentric rotating inclined plate device arranged in a close-packed manner (left view, the dashed circle is the circumscribed circle of the eccentric rotating inclined plate device).

[0017] Figure 5 This is a schematic diagram of the sludge accumulation formed at the upper end of the eccentric rotating inclined plate device (the dashed line is a straight line perpendicular to the axis, dividing the eccentric rotating inclined plate device into left and right parts).

[0018] In the diagram: 1. Sedimentation tank body, 1-1. Buffer inlet area, 1-2. 2. Eccentric rotating inclined plate area, 3. Eccentric rotating inclined plate device, 3-1. Rotating main shaft, 3-2. Inlet structure, 4. Outlet structure, 5. Sludge pump, 6. Sludge hopper.

[0019] principle

[0020] The eccentric rotating inclined plate device itself has weight, with its center of gravity located at the geometric center of gravity of the rotating inclined plate. Due to its eccentric structure, the center of gravity is offset from the axis. When its two ends are placed horizontally in the sleeve, gravity will cause the rotating inclined plate to generate a torque around its axis, resulting in a downward rotation tendency. Friction exists between the shaft and the sleeve, generating a torque opposite to the rotational tendency of the inclined plate, which helps maintain its relative stillness. During operation, taking the uppermost eccentric rotating inclined plate device as an example, when sewage flows horizontally over the rotating inclined plate, particles and flocculent matter in the sewage will settle to the upper end of the rotating inclined plate, such as... Figure 5 As shown. Since a rotating inclined plate at any angle will not have a symmetrical structure, it will inevitably lead to a difference in the weight of the settled sludge in the left and right parts divided by the vertical axis. The difference in the weight of the sludge on both sides will generate a torque M1 around the axis. The weight of the sludge on both sides will also be applied to the rotating main axis, resulting in additional friction. The additional friction will generate a torque M around the rotating main axis. f As the sludge settles on the rotating inclined plate, when M1 > M f The sludge automatically rotates, causing the upper sludge to flip and fall to the lower level. Under gravity, it then settles onto the next sludge layer. Each layer operates on the same principle, until the sludge reaches the bottom of the sedimentation tank, completing the entire settling process. After being unloaded, the rotating sludge returns to equilibrium due to friction, ready for the next cycle. Because the formation and vertical settling of sludge are unaffected by the sludge angle, sludge blockage is significantly reduced, saving on maintenance costs. Furthermore, the use of closely spaced external cylinders on the eccentric rotating sludge device increases the settling area and improves settling efficiency while preventing interference and collisions between the rotating sludge plates. Detailed Implementation

[0021] To make the technical objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] A lateral flow self-rotating eccentric inclined plate sedimentation tank includes a sedimentation tank body, an eccentric rotating inclined plate zone, an eccentric rotating inclined plate device, an inlet structure, an outlet structure, a sludge pump, and a sludge collection hopper. The sedimentation tank body has a cuboid structure and includes a buffer inlet zone and a sedimentation zone. The buffer inlet zone is located on one side of the inlet structure, and the sedimentation zone is located between the inlet structure and the outlet structure. The eccentric rotating inclined plate zone is positioned above the sedimentation zone, and the sludge pump and sludge collection hopper are located at the bottom of the sedimentation zone.

[0023] The eccentric rotating inclined plate area consists of several eccentric rotating inclined plate devices. Each eccentric rotating inclined plate device consists of a rotating main shaft and a rotating inclined plate. The rotating inclined plate is tangent to the rotating main shaft, and the tangent is located on one of the long sides of the rotating inclined plate, forming an eccentric structure. With the axis of the rotating main shaft as the center, the rotating inclined plates are fixed on the rotating main shaft in a ring array. The number of plates is set to 6 to 10, and they are of equal length. The length of the rotating inclined plate is shorter than the length of the rotating main shaft, and the ratio of the width of the rotating inclined plate to the diameter of the rotating main shaft is 15:1 to 20:1.

[0024] The eccentric rotating inclined plate area is composed of several eccentric rotating inclined plate devices placed horizontally. The outer cylinders formed by the eccentric rotating inclined plate devices are arranged in a close-packed manner in planar circles. The two ends of the rotating main shaft are placed in the fixed sleeves in the structural frame. The rotating inclined plate can rotate freely around the rotating main shaft at the placement point. During operation, water enters and exits along the direction of the rotating main shaft.

Claims

1. A side-flow self-rotating eccentric inclined plate sedimentation tank, comprising a sedimentation tank body (1), an eccentric rotating inclined plate area (2), an eccentric rotating inclined plate device (3), an inlet structure (4), an outlet structure (5), a sludge pump (6), and a sludge collection hopper (7); the sedimentation tank body (1) is a cuboid structure, comprising a buffer inlet area (1-1) and a sedimentation area (1-2), the buffer inlet area (1-1) being located on one side of the inlet structure (4), the sedimentation area (1-2) being located between the inlet structure (4) and the outlet structure (5), the eccentric rotating inclined plate area (2) being located above the sedimentation area (1-2), and the sludge pump (6) and the sludge collection hopper (7) being located at the bottom of the sedimentation area; the eccentric rotating inclined plate area (2) is characterized in that: It consists of several eccentric rotating inclined plate devices (3). Each eccentric rotating inclined plate device (3) consists of a rotating main shaft (3-1) and a rotating inclined plate (3-2). The rotating inclined plate (3-2) is tangent to the rotating main shaft (3-1), and the tangent line is located on one of the long sides of the rotating inclined plate (3-2), forming an eccentric structure. With the axis of the rotating main shaft (3-1) as the center, the rotating inclined plates (3-2) are fixed in a ring array on the rotating main shaft (3-1). The number of plates is set to 6 to 10, and they are of equal length. The length of the rotating inclined plate (3-2) is shorter than that of the rotating main shaft (3-1). The length of 3-1), and the ratio of the width of the rotating inclined plate (3-2) to the diameter of the rotating main shaft (3-1) is 15:1 to 20:1; the eccentric rotating inclined plate area (2) is composed of several eccentric rotating inclined plate devices (3) placed horizontally, the outer cylinders formed by the eccentric rotating inclined plate devices (3) are arranged in a close-packed manner in planar circles, the two ends of the rotating main shaft (3-1) are placed in the fixed sleeves in the structural frame, the rotating inclined plate (3-2) can rotate freely around the rotating main shaft (3-1) at the placement location, and water enters and exits along the direction of the rotating main shaft (3-1) during operation.

Images