A rotating inclined plate sedimentation tank

Abstract

The application discloses a rotary inclined plate sedimentation tank and relates to the field of sewage treatment equipment. The rotary inclined plate sedimentation tank comprises a sedimentation tank body, a water inlet structure, a rotary inclined plate structure, a sludge collecting hopper and a water outlet structure. The inclined plate structure adopts a rotatable inclined plate device. The rotatable inclined plate device can rotate periodically due to the rotating force generated by the screw propeller at the end of the rotary inclined plate in the process of water flow and the rotating force generated by the uneven gravity distribution of sludge on the rotary inclined plate. Therefore, the sludge can be smoothly settled without being limited by the inclination angle, the sedimentation efficiency is improved, and the traditional sludge blockage phenomenon of the inclined plate is avoided.

Description

Technical Field

[0001] This invention relates to a sedimentation tank device, a rotary inclined plate sedimentation tank, and relates to the field of wastewater treatment equipment. Background Technology

[0002] An inclined plate sedimentation tank is a sedimentation tank with inclined plates within the sedimentation zone. It is a commonly used solid-liquid separation facility in water treatment processes. In advanced treatment processes, inclined plate sedimentation tanks are frequently used as the final treatment unit to intercept fine particulate matter in the water, thereby improving effluent quality. Based on the relative movement direction of water flow and particles, inclined plate sedimentation tanks can be classified into three different separation methods: co-current, counter-current, and lateral flow, with counter-current flow being the most widely used. In counter-current inclined plate sedimentation tanks, the inclined plates are stacked, and the plates are at a certain angle to the horizontal plane (generally 55-60°). Water flows from bottom to top. Over time, fine particles on the inclined plate walls gradually accumulate into sludge, which slides down the inclined plates to the bottom of the sedimentation tank. The main problem with existing inclined plate sedimentation tanks is that during sedimentation, sludge adheres to the inclined plate surface. Often, the sludge's weight is insufficient to allow it to slide down the inclined plate, causing blockage and affecting the plate's lifespan and sedimentation efficiency. The sedimentation tank needs to be drained during cleaning, which is difficult to maintain, requires a lot of work, and consumes a lot of manpower and resources. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotating inclined plate sedimentation tank.

[0004] The objective of this invention can be achieved through the following measures.

[0005] A rotary inclined plate sedimentation tank includes a sedimentation tank body, an inlet structure, a rotary inclined plate zone, a rotary inclined plate device, a sludge collection hopper and a sludge discharge pump, and an outlet structure. 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 inclined plate zone is located above the sedimentation zone, and the sludge collection hopper and the sludge discharge pump are located at the bottom of the sedimentation zone.

[0006] Furthermore, the rotating inclined plate area consists of several rotating inclined plate devices. Each rotating plate device consists of three parts: a rotating main shaft, a rotating plate, and a propeller. The rotating plates are fixed on the rotating main shaft in a circular array, with 6 to 10 plates (preferably 8 plates) of equal length.

[0007] Furthermore, a propeller is provided at one end of the rotating main shaft, with 3 to 6 blades (preferably 3 blades), and there is a small distance between the plane of the propeller and the plane of the nearest end of the rotating plate. The diameter of the propeller is similar to the diameter of the circumscribed circle formed by the rotating plate.

[0008] Furthermore, the rotating inclined plate area is composed of several rotating inclined plate devices placed at an angle of 15-60° to the horizontal plane. The outer cylinders formed by the rotating inclined plate devices are arranged in a close-packed manner in planar circles, and the end with the rotating propeller is located at the top of the rotating inclined plate layer. The two ends of the rotating main shaft are placed in the fixing holes in the structural frame, and the rotating plate and propeller can rotate freely around the rotating main shaft at the placement location.

[0009] Compared with existing technologies, the present invention can produce the following positive effects.

[0010] 1. Rotary inclined plate sedimentation tanks can follow the principle of traditional inclined plate sedimentation tanks, where sludge slides down the inclined plate to the bottom sludge zone. However, the rotation of the inclined plate can also cause the sludge on the plate to settle vertically directly into the sludge zone. Therefore, unlike traditional inclined plate sedimentation tanks, they are less prone to sludge clogging of the inclined plate, saving on later maintenance costs.

[0011] 2. Traditional inclined plate sedimentation tanks generally suffer from a contradiction between the inclination angle and sedimentation efficiency. A smaller inclination angle results in better sedimentation on the inclined plate. However, if the inclination angle is too small, the automatic sludge discharge is not smooth enough, and sludge easily accumulates on the inclined plate. Generally, for counter-current inclined plate sedimentation tanks, the inclination angle is not less than 55°–60°. However, in this invention, the rotary inclined plate sedimentation tank is not limited by the inclination angle. Even at a relatively small inclination angle, sludge can still be discharged smoothly through rotation. Therefore, a small inclination angle can improve sedimentation efficiency without clogging the inclined plate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a rotating inclined plate sedimentation tank according to the present invention.

[0013] Figure 2 This is a schematic diagram of the rotating inclined plate device of the present invention.

[0014] Figure 3 The assembly diagram is shown in the close arrangement of the circumcircle of the rotating inclined plate device (view of the tilt angle of the rotating inclined plate, the dashed line is a schematic diagram of the circumcircle of the rotating inclined plate).

[0015] Figure 4 This is a schematic diagram of the sludge accumulation formed at the upper end of the rotating inclined plate device.

[0016] In the diagram: 1. Sedimentation tank body, 1-1. Buffer inlet area, 1-2. 2. Rotating inclined plate area, 3. Rotating device, 3-1. Rotating main shaft, 3-2. Propeller, 3-3. 4. Inlet structure, 5. Sludge pump, 6. Sludge hopper, 7. Outlet structure. principle

[0017] During operation, the entire rotary inclined plate sedimentation tank 1 adopts a counter-current flow method with water entering from the bottom and exiting from the top. Particles and flocculent matter in the sewage will settle onto the inclined plate at the upper end of the rotary inclined plate device 3, which will rotate using two types of power.

[0018] 1. The flow rate during the upward flow of water can drive the propeller 3-3 to rotate slowly, thereby driving the entire rotating inclined plate device 3 to rotate slowly. Therefore, the sludge formed by particles and flocs can not only slide down the plane of the rotating inclined plate 3-2 to the bottom of the tank, but also, during the rotation, the sludge at the upper end of the rotating inclined plate device 3 can be flipped down with the rotation of the inclined plate. Under the action of gravity, the sludge directly settles to the bottom or onto the adjacent rotating inclined plate device 3. The adjacent inclined plate device 3 repeats the above working process and finally deposits the sludge to the bottom of the sedimentation tank.

[0019] 2. When a certain weight of sludge is deposited on the upper end of the rotating inclined plate device 3, due to the uneven water quality and the uncertainty of the weight of sludge deposited on each part of the inclined plate, the weight of the sludge on the left and right sides of the upper end of the rotating inclined plate device 3 will be uneven, causing it to overturn and rotate.

[0020] Therefore, the combined effect of the two forces drives the rotation, greatly reducing the likelihood of sludge clogging the inclined plate. Simultaneously, the close arrangement of external cylinders on the rotating inclined plate device 3 increases the sedimentation area and improves sedimentation efficiency. Detailed Implementation

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

[0022] The present invention provides a rotary inclined plate sedimentation tank, comprising a sedimentation tank body 1, a rotary inclined plate area 2, a rotary inclined plate device 3, an inlet structure 4, a sludge pump 5, a sludge collection hopper 6, and an outlet structure 7. The sedimentation tank body 1 is a cuboid structure, and includes a buffer inlet area 1-1 and a sedimentation area 1-2. The buffer inlet area 1-1 is located on one side of the inlet structure 4, and the sedimentation area 1-2 is located between the inlet structure 4 and the outlet structure 7. The inclined plate area 2 is located above the sedimentation area 1-2, and the sludge pump 5 and the sludge collection hopper 6 are located at the bottom of the sedimentation area.

[0023] Within the rotating inclined plate area 2, there are several rotating inclined plate devices 3. Each rotating plate device 3 consists of three parts: a rotating main shaft 3-1, rotating plates 3-2, and a propeller 3-3. The rotating plates 3-2 are fixed on the rotating main shaft 3-1 in a circular array, with 6 to 10 plates (preferably 8 plates) of equal length.

[0024] The rotating main shaft 3-1 has a propeller 3-3 at one end, with 3 to 6 blades (preferably 3 blades). There is a small distance between the plane of the propeller and the plane of the nearest end of the rotating plate. The diameter of the propeller 3-3 is similar to the diameter of the circumscribed circle formed by the rotating plate 3-2.

[0025] In the rotating inclined plate area 2, several rotating inclined plate devices 3 are placed at an angle of 15 to 60° to the horizontal plane. The outer cylinders formed by the rotating inclined plate devices 3 are arranged in a close-packed manner in planar circles, and one end of the rotating propeller 3-3 is located at the upper part of the rotating layer 2. The two ends of the rotating main shaft 3-1 are placed in the fixing holes in the structural frame. The rotating plate 3-2 and the propeller 3-3 can rotate freely around the rotating main shaft 3-1 at the placement location.

Claims

1. A rotating inclined plate sedimentation tank, wherein the rotating inclined plate sedimentation tank is characterized in that... The sedimentation tank includes a sedimentation tank body (1), a rotating inclined plate area (2), a rotating inclined plate device (3), an inlet structure (4), a sludge pump (5), a sludge collection hopper (6), and an outlet structure (7). The sedimentation tank body (1) is a cuboid structure. The sedimentation tank body includes a buffer inlet area (1-1) and a sedimentation area (1-2). The buffer inlet area (1-1) is located on one side of the inlet structure (4), the sedimentation area (1-2) is located between the inlet structure (4) and the outlet structure (7), the inclined plate area (2) is located above the sedimentation area (1-2), and the sludge pump (5) and the sludge collection hopper (6) are located at the bottom of the sedimentation area.

2. Within the rotating inclined plate region (2) according to claim 1, characterized in that... It consists of several rotating inclined plate devices (3). Each rotating plate device (3) consists of three parts: a rotating main shaft (3-1), rotating plates (3-2), and a propeller (3-3). The rotating plates (3-2) are fixed on the rotating main shaft (3-1) in a ring array, and the number of plates is set to 6 to 10 (preferably 8) and the plates are of equal length.

3. The rotating spindle (3-1) according to claim 2, characterized in that... One end is provided with a propeller (3-3) with 3 to 6 blades (preferably 3 blades), and there is a small distance between the plane of the propeller and the plane of the nearest end of the rotating plate. The diameter of the propeller (3-3) is similar to the diameter of the circumscribed circle formed by the rotating plate (3-2).

4. In the rotating inclined plate region (2) according to claim 1, the characteristic is that It consists of several rotating inclined plate devices (3) placed at an angle of 15 to 60° to the horizontal plane. The outer cylinders formed by the rotating inclined plate devices (3) are arranged in a close-packed manner in planar circles, and one end of the rotating propeller (3-3) is located on the upper part of the rotating layer (2). The two ends of the rotating main shaft (3-1) are placed in the fixing holes in the structural frame. The rotating plate (3-2) and the propeller (3-3) can rotate freely around the rotating main shaft (3-1) at the placement location.

Images