Layered pushing type rotational flow sand setting system

Abstract

The utility model provides a layered push type rotational flow grit system, which relates to the technical field of sewage treatment and comprises a grit chamber, a grit stirring device, a grit suction pump and a grit suction port, and the grit stirring device comprises a power component, an upper-layer paddle component and a lower-layer paddle component. The upper-layer paddle assembly and the lower-layer paddle assembly are coaxially arranged in the grit chamber up and down and are used for forming a stepped flow field, the diameter of the upper-layer paddle assembly is larger than that of the lower-layer paddle assembly, the upper-layer paddle assembly is a small-angle bend or a flat paddle which is smaller than or equal to 15 degrees and is used for forming a downward pressing flow state, and the lower-layer paddle assembly is a large-angle bend which is larger than or equal to 30 degrees and is used for forming a downward pressing flow state. The upper-layer downward pressing flow inhibits surface vortexes, the lower-layer pushing flow enhances the radial movement of sand grains, the sand grain separation efficiency is improved, and the power consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a layered push-pressure vortex grit settling system. Background Technology

[0002] Grit chambers are mainly used to remove sand particles within a certain size range from sewage to protect pipes, valves and other facilities from wear and blockage. Currently, the main types of grit chambers include horizontal flow grit chambers, aerated grit chambers, and vortex grit chambers.

[0003] Existing cyclone sedimentation tank agitators mostly adopt a single blade structure, which has problems such as low sand separation efficiency and turbulent flow. Traditional designs cannot simultaneously meet the dual requirements of suppressing surface suspended matter and pushing bottom sand particles. In order to address the above-mentioned shortcomings, this application is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a layered push-pressure vortex grit settling system, which adopts an upper and lower double-layer irregularly shaped blade structure, and solves the problems of low sand separation efficiency and turbulent flow in current grit settling tanks.

[0005] To address the aforementioned problems, this utility model provides a layered push-pressure vortex sedimentation system, comprising a sedimentation tank, a sedimentation mixing device, a sand suction pump, and a sand suction port. The sedimentation mixing device includes a power component, an upper blade assembly, and a lower blade assembly. The power component drives the upper and lower blade assemblies to rotate. The upper and lower blade assemblies are coaxially arranged in the sedimentation tank, one above the other, to form a stepped flow field. The diameter of the upper blade assembly is larger than that of the lower blade assembly. The upper blade assembly is a small-angle bend of ≤15° or a flat blade to form a downward-pressure flow, while the lower blade assembly is a large-angle bend of ≥30° to generate a horizontal push flow. The upper downward-pressure flow suppresses surface vortices, while the lower push flow enhances the radial movement of sand particles, thereby improving sand separation efficiency and reducing power consumption.

[0006] According to one embodiment of the present invention, the lower blade assembly is bent at a large angle of 30~45°.

[0007] According to one embodiment of the present invention, the distance between the upper blade assembly and the lower blade assembly is 0.3 to 0.5 times the diameter of the upper blade assembly.

[0008] According to one embodiment of the present invention, the diameter of the lower blade assembly is 0.6 to 0.8 times the diameter of the upper blade assembly.

[0009] According to one embodiment of the present invention, the power assembly includes a motor and a hollow shaft, and both the upper blade assembly and the lower blade assembly are mounted on the hollow shaft.

[0010] According to one embodiment of the present invention, the blades in the upper blade assembly and / or the lower blade assembly are detachably installed, which facilitates maintenance and replacement.

[0011] According to one embodiment of the present invention, a blade mounting ring is provided on the hollow shaft body, and a plurality of protruding insertion portions are provided on the outer circumference of the blade mounting ring. A locking portion is provided on the blade, and the locking portion and the protruding insertion portion are connected by a connector after being inserted into each other.

[0012] According to one embodiment of the present invention, the blades of the lower blade assembly are provided with an array of guide holes.

[0013] According to one embodiment of the present invention, the blade surfaces of the lower blade assembly and / or the upper blade assembly are provided with a wear-resistant ceramic coating.

[0014] According to one embodiment of the present invention, the lower blade assembly includes four blades, and the upper blade assembly includes two blades.

[0015] The beneficial effects of this utility model are that by setting up an upper and lower double-layer irregular blade structure and designing differentiated blade angles and sizes, a stepped flow field is formed. The upper layer suppresses surface vortices with downward pressure flow, while the lower layer enhances the radial movement of sand particles by pushing flow, thus solving the problem of turbulent flow in traditional sedimentation tanks. The synergistic effect of the two flow fields improves the sand particle separation efficiency, and the power consumption is reduced compared to traditional single-layer agitators. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of a layered push-type vortex sedimentation system;

[0018] Figure 2 This is a schematic diagram of the grit mixing device.

[0019] Figure 3 This is a schematic diagram of the blade connection assembly. Detailed Implementation

[0020] The following description is only intended to disclose the present invention so that those skilled in the art can implement it. The embodiments in the following description are merely examples, and those skilled in the art will conceive of other obvious modifications. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.

[0021] Example 1:

[0022] A layered push-pressure vortex sedimentation system, such as Figure 1It includes a sedimentation tank 1, a sedimentation mixing device 2, a sand suction pump 5 and a sand suction port 4. The sand suction port 4 is connected to the sand suction pump 5 and is located at the bottom of the sedimentation tank 1.

[0023] The sedimentation mixing device 2 includes a power component, an upper blade assembly 22 and a lower blade assembly 23. The power component includes a motor 27 and a hollow shaft 21. The motor 27 is connected to the hollow shaft 21 through a transmission mechanism such as a belt or gear. A cover plate 3 is provided in the sedimentation tank 1, and the lower end of the hollow shaft 21 is connected to the cover plate 3.

[0024] The upper blade assembly 22 and the lower blade assembly 23 are both mounted on the hollow shaft 21, so that the upper blade assembly 22 and the lower blade assembly 23 are arranged coaxially in the sedimentation tank 1, one above the other.

[0025] Among them: the diameter of the upper blade assembly 22 is D1, and it adopts a small angle bend of 0~15° or flat blade to form a downward flow state; the diameter of the lower blade assembly 23 is D2, D2=0.6~0.8D1, and it adopts a large angle bend of 30-45° to generate a horizontal thrust flow.

[0026] The distance between the two blades is H = (0.3~0.5)D1, forming a stepped flow field. The upper layer suppresses surface vortices with downward pressure flow, while the lower layer enhances the radial motion of sand particles with thrust flow. The synergistic effect of the two flow fields improves the sand particle separation efficiency by more than 40%, and reduces power consumption by about 15% compared with traditional single-layer agitators.

[0027] In this embodiment, preferably, the lower blade assembly 23 includes four 45° bent blades with a diameter of 900mm and a folding height of 80mm, and the upper blade assembly 22 includes two straight blades with a diameter of 1200mm and a thickness of 10mm; the installation angle is: the upper blades are installed horizontally, and the lower blades are at a 10° elevation angle to the horizontal plane.

[0028] Example 2:

[0029] Based on Embodiment 1, in this embodiment, the blades in the upper blade assembly 22 and the lower blade assembly 23 are detachably installed, which facilitates maintenance and replacement.

[0030] like Figure 3 The hollow shaft 21 is provided with a blade mounting ring 24. The outer surface of the blade mounting ring 24 is provided with several protruding insertion parts 25. The blade is provided with a locking part 26. The locking part 26 can be configured as a U-shaped groove. Both the locking part 26 and the protruding insertion parts 25 are provided with bolt holes. After the locking part 26 and the protruding insertion parts 25 are inserted, they are connected by bolts.

[0031] The above connection method allows for easy adjustment of the number of blades installed.

[0032] Example 3:

[0033] Based on embodiment 1 or 2, the blades of the lower blade assembly 23 are provided with an array of guide holes, and the blade surfaces of the lower blade assembly 23 and the upper blade assembly 22 are provided with a wear-resistant ceramic coating.

[0034] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations and modifications.

Claims

1. A layered push-pressure vortex sedimentation system, characterized in that: The system includes a sedimentation tank (1), a sedimentation mixing device (2), a sand suction pump (5), and a sand suction port (4). The sedimentation mixing device (2) includes a power component, an upper blade assembly (22), and a lower blade assembly (23). The power component is used to drive the upper blade assembly (22) and the lower blade assembly (23) to rotate. The upper blade assembly (22) and the lower blade assembly (23) are arranged coaxially in the sedimentation tank (1) to form a stepped flow field. The diameter of the upper blade assembly (22) is larger than the diameter of the lower blade assembly (23). The upper blade assembly (22) is a small-angle bend of ≤15° or a flat blade to form a downward flow state. The lower blade assembly (23) is a large-angle bend of ≥30° to generate a horizontal flow.

2. The layered push-pressure vortex sedimentation system according to claim 1, characterized in that: The lower blade assembly (23) is bent at a large angle of 30~45°.

3. The layered push-pressure vortex sedimentation system according to claim 1, characterized in that: The distance between the upper blade assembly (22) and the lower blade assembly (23) is 0.3 to 0.5 times the diameter of the upper blade assembly (22).

4. The layered push-pressure vortex sedimentation system according to claim 3, characterized in that: The diameter of the lower blade assembly (23) is 0.6 to 0.8 times the diameter of the upper blade assembly (22).

5. The layered push-pressure vortex sedimentation system according to any one of claims 1-4, characterized in that: The power assembly includes a motor (27) and a hollow shaft (21), and the upper blade assembly (22) and the lower blade assembly (23) are both mounted on the hollow shaft (21).

6. The layered push-pressure vortex sedimentation system according to claim 5, characterized in that: The blades in the upper blade assembly (22) and / or the lower blade assembly (23) are detachably installed.

7. The layered push-pressure vortex sedimentation system according to claim 6, characterized in that: The hollow shaft (21) is provided with a blade mounting ring (24), and the outer surface of the blade mounting ring (24) is provided with a plurality of protruding insertion parts (25). The blade is provided with a locking part (26). The locking part (26) and the protruding insertion parts (25) are connected by a connector after being inserted.

8. The layered push-pressure vortex sedimentation system according to any one of claims 1-4, characterized in that: The blades of the lower blade assembly (23) are provided with flow guide holes.

9. The layered push-pressure vortex sedimentation system according to any one of claims 1-4, characterized in that: The blade surfaces of the lower blade assembly (23) and / or the upper blade assembly (22) are provided with a wear-resistant ceramic coating.

10. The layered push-pressure vortex sedimentation system according to any one of claims 1-4, characterized in that: The lower blade assembly (23) includes four blades, and the upper blade assembly (22) includes two blades.

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