Rotary cage filter

Abstract

This invention discloses a rotating cage filter, comprising: a sedimentation tank and a central filter located in the middle of the sedimentation tank; the central filter includes: a fixed cylindrical shell and a rotating shaft coaxially disposed at the center of the cylindrical shell; the rotating shaft has a D-shaped or drum-shaped cross-section; multiple filter cage assemblies are strung on the rotating shaft within the cylindrical shell; each filter cage assembly includes: a packing cage, an outer sliding sleeve, and an inner sliding sleeve; the packing cage consists of an outer ring sidewall, an inner ring sidewall, and a filter perforated plate disposed between the bottom of the outer ring sidewall and the inner ring sidewall; each packing cage is fixed to the outer sliding sleeve and the outer sidewall by an outer positioning pin; or, the inner sliding sleeve and the inner sidewall are fixed to each other. Through the rotating design of the packing cages, relative movement between adjacent packing cages is achieved, allowing wastewater to pass evenly through the packing layer, significantly improving the packing utilization rate and filtration efficiency.

Description

Technical Field

[0001] This invention relates to the field of water treatment, and more specifically to a rotary cage filter for wastewater treatment. Background Technology

[0002] Filter beds are a common device in water treatment. They are filled with packing material that purifies wastewater through retention and adsorption, or it can be loaded with microorganisms for further purification. Regardless of the method, wastewater needs to flow through the packing material. However, in actual operation, due to improper spatial arrangement of the packing material, wastewater does not flow evenly but concentrates in a specific area, leaving other areas of the packing ineffective and resulting in waste. Summary of the Invention

[0003] To overcome the above-mentioned defects, the present invention aims to provide a rotating cage filter.

[0004] To achieve the above objectives, the present invention provides a rotating cage filter, comprising a sedimentation tank and a central filter located in the middle of the sedimentation tank.

[0005] The central filter includes:

[0006] A stationary cylindrical shell, and a rotating shaft coaxially disposed at the center of the cylindrical shell; the cross-section of the rotating shaft is D-shaped or drum-shaped;

[0007] Multiple filter cage assemblies are connected in series on a rotating shaft inside the cylindrical shell;

[0008] Each filter cage assembly includes: a packing cage, an outer sliding sleeve, and an inner sliding sleeve;

[0009] The packing cage consists of an outer ring sidewall, an inner ring sidewall, and a filter plate disposed between the bottom of the outer ring sidewall and the inner ring sidewall;

[0010] One or more positioning protrusions are vertically arranged on the inner side wall of the cylindrical shell; an outer sliding sleeve is provided on the outer ring side wall of the packing cage corresponding to the positioning protrusions; an outer sliding sleeve positioning hole is provided on the outer sliding sleeve; an outer wall positioning hole is provided on the outer side wall of the packing cage corresponding to the positioning hole.

[0011] One or two semi-circular inner sliding sleeves are provided in the inner ring sidewall of each packing cage corresponding to the rotating shaft; the cross-section of the rotating shaft and the cross-section of the semi-circular inner sliding sleeve together form a circle that fits the inner ring sidewall; an inner sliding sleeve positioning hole is provided on the semi-circular inner sliding sleeve; an inner ring sidewall positioning hole is provided on the inner ring sidewall of the packing cage corresponding to the inner sliding sleeve positioning hole.

[0012] Each of the aforementioned packing cages is fixed to the outer sliding sleeve and the outer side wall by means of an outer positioning pin passing through the outer sliding sleeve positioning hole and the outer side wall positioning hole; or, each of the aforementioned packing cages is fixed to the inner sliding sleeve and the inner side wall by means of an inner positioning pin passing through the inner sliding sleeve positioning hole and the inner ring side wall positioning hole.

[0013] Furthermore, a water inlet cavity is formed in the lower part of the cylindrical shell.

[0014] Furthermore, a dosing container for adding chemicals is provided at the upper end of the rotating shaft. The dosing container is equipped with a dosing pipe. The dosing container rotates with the rotating shaft, so that the chemicals are evenly added to the sedimentation zone.

[0015] Furthermore, a sludge discharge pipe is installed at the bottom of the sedimentation zone.

[0016] Furthermore, there is a water outlet pipe on the side of the sedimentation zone.

[0017] Furthermore, the packing cages that fix the outer sliding sleeve and the outer side wall to each other are alternately arranged with the packing cages that fix the inner sliding sleeve and the inner side wall to each other.

[0018] Furthermore, rollers are provided at the bottom of the outer wall of each packing cage.

[0019] The present invention has the following advantages:

[0020] (1) By rotating the packing cage, the relative movement between adjacent packing cages is realized, so that sewage passes through the packing layer evenly, which significantly improves the packing utilization rate and filtration efficiency.

[0021] (2) The integrated filtration and sedimentation functions simplify the process, reduce the floor space, and lower construction and operating costs.

[0022] (3) The dosing system rotates with the shaft to ensure that the flocculant is added evenly, improve the sedimentation effect, and further optimize the quality of the effluent.

[0023] (4) The modular packing cage design facilitates maintenance and packing replacement, and is flexible in operation to meet different water quality treatment needs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the rotating cage filter structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the filter tank container;

[0026] Figure 3 This is a schematic diagram of the packing cage structure;

[0027] Figure 4 yes Figure 3 An explosion diagram;

[0028] Figure 5 This is a schematic diagram of the structure of the dosing container.

[0029] in:

[0030] 11 – Inlet pipe; 12 – Outlet pipe; 20 – Filter area; 21 – Cylindrical shell; 22 – Divider bottom plate; 23 – Positioning protrusion; 30 – Packing cage; 31 – Outer ring sidewall; 32 – Inner ring sidewall; 33 – Porous bottom plate; 34 – Packing cage roller; 35 – Outer sliding sleeve; 36 – Positioning hole on outer ring sidewall; 37 – Inner sliding sleeve; 38 – Positioning hole on inner ring sidewall; 40 – Rotating shaft; 43 – Shoulder of dosing container; 51 – Dosing container; 52 – Dosing pipe; 61 – Sedimentation zone; 62 – Sludge discharge pipe. Detailed Implementation

[0031] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0032] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] like Figure 1As shown, the rotating cage filter device of the present invention is divided into two parts: filtration and sedimentation. Wastewater enters the filter zone 20 through the inlet pipe 11, passes upward through several packing cages 30, and overflows into the sedimentation zone 61. The flocculant added through the dosing container 51 and dosing pipe 52 causes sedimentation. The sediment and effluent are discharged from the sludge discharge pipe 62 and the effluent pipe 12, respectively. A rotating shaft 40 rotates in the filter zone. Valves are provided for the inlet pipe, effluent pipe, dosing pipe, and sludge discharge pipe.

[0036] Figure 2 This is a detailed schematic diagram of the filter tank container. The structure includes a cylindrical shell 21; an annular dividing plate 22 at the bottom of the cylindrical shell, which divides the cylindrical shell into upper and lower parts. The lower part is used for water inlet, through which the water inlet pipe passes; the upper part is used to house the packing cage. The structure is fixed in position and does not rotate with the shaft.

[0037] like Figure 3 and Figure 4 As shown, the packing cage consists of an outer ring sidewall 31, an inner ring sidewall 32, and a porous bottom plate 33;

[0038] A positioning protrusion 23 is vertically arranged on the inner wall of the cylindrical shell; there can be one or two positioning protrusions. One or two outer sliding sleeves 35 are provided between the outer ring sidewall of each packing cage and the inner wall of the cylindrical shell. The positioning protrusion and the outer sliding sleeves form a complete circle. Figure 2 and Figure 3 The positioning protrusions shown are two symmetrically arranged positioning protrusions; corresponding to the two positioning protrusions, there are two semi-annular outer sliding sleeves, and the two semi-annular outer sliding sleeves and the two positioning protrusions form a complete circle;

[0039] The cross-section of the rotating shaft 40 can be D-shaped or drum-shaped, and one or two inner sliding sleeves 37 are provided between the inner ring sidewall of each packing cage and the rotating shaft; the rotating shaft and one or two semi-circular inner sliding sleeves form a complete circle.

[0040] As shown in the figure, the outer ring sidewall 31 has an outer ring sidewall positioning hole 36, and the outer sliding sleeve has a corresponding outer sliding sleeve positioning hole. The outer ring sidewall positioning hole and the outer sliding sleeve positioning hole can be connected and fixed by means of pins, screws, etc., so that the outer ring sidewall of the packing cage and the outer sliding sleeve are fixed to each other.

[0041] Similarly, the inner ring sidewall 32 has an inner ring sidewall positioning hole 38, and the inner sliding sleeve has a corresponding inner sliding sleeve positioning hole. The inner ring sidewall positioning hole and the inner sliding sleeve positioning hole can be connected and fixed by means of pins, screws, etc., so that the inner ring sidewall of the packing cage and the inner sliding sleeve are fixed to each other.

[0042] When the outer ring sidewall of a packing cage is fixed to the outer sliding sleeve, the inner ring sidewall of the packing cage cannot be fixed to the inner sliding sleeve; at this time, the packing cage is connected to the cylindrical shell and remains fixed.

[0043] Similarly, when the inner ring sidewall and the inner sliding sleeve of a certain packing cage are fixed to each other, the outer ring sidewall and the outer sliding sleeve of the packing cage cannot be fixed to each other; at this time, the packing cage is connected to the rotating shaft and rotates with the rotating shaft.

[0044] The packing cage can be connected to the cylindrical shell or to the rotating shaft, depending on the requirements. For example, packing cages connected to the cylindrical shell and packing cages connected to the rotating shaft can be alternately installed.

[0045] As a further improvement of the present invention, rollers 34 are provided at the bottom of the packing cage. During use, the rollers 34 are placed on the outer ring side wall of the next layer of packing cage. Since the diameter and height of the cylindrical shell are relatively large, during installation, each packing cage must first be connected to the cylindrical shell or to the rotating shaft from the outside. The connection sequence can be alternating between packing cage rotation - packing cage fixing - packing cage rotation to achieve relative rotation between adjacent packing cages.

[0046] The shaft rotates under the drive of a motor. For example... Figure 5 As shown, the upper part of the rotating shaft has a shoulder 43 for the dosing container, and the dosing container 51 is provided with a matching notch, which can fix the dosing container on the rotating shaft and rotate with the rotating shaft; a dosing pipe is provided at the bottom of the side wall of the dosing container 51, and the outlet of the dosing pipe is set to the sedimentation zone outside the cylindrical shell. When the dosing container rotates, the dosing pipe flows out flocculant, so that the flocculant is evenly added to the sedimentation zone.

[0047] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described above. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Many other changes and modifications made without departing from the concept and scope of the present invention should be considered within the scope of protection of the present invention.

[0048] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rotating cage filter, characterized in that, The center filter tank is located in the middle of the sedimentation tank. The center filter tank comprises: A fixed cylindrical shell and a rotating shaft coaxially arranged in the center of the cylindrical shell; the cross section of the rotating shaft is D-shaped or drum-shaped; A plurality of filter cage assemblies are arranged on the rotating shaft in the cylindrical shell; Each filter cage assembly comprises a filler cage, an outer sliding sleeve and an inner sliding sleeve; The filler cage is composed of an outer ring sidewall, an inner ring sidewall and a porous bottom plate arranged between the bottom of the outer ring sidewall and the inner ring sidewall; One or more positioning convex strips are vertically arranged on the inner sidewall of the cylindrical shell; an outer sliding sleeve is arranged on the outer ring sidewall of the filler cage corresponding to the positioning convex strips, and the positioning convex strips and the outer sliding sleeve form a complete circle; an outer sliding sleeve positioning hole is arranged on the outer sliding sleeve; an outer sidewall positioning hole is arranged on the outer sidewall of the filler cage corresponding to the positioning hole; One or two inner sliding sleeves with a semicircular cross section are arranged in the inner ring sidewall of each filler cage corresponding to the rotating shaft; the cross section of the rotating shaft and the cross section of the semicircular inner sliding sleeve together form a circle adapted to the inner ring sidewall; an inner sliding sleeve positioning hole is arranged on the semicircular inner sliding sleeve; an inner ring sidewall positioning hole is arranged on the inner ring sidewall of the filler cage corresponding to the inner sliding sleeve positioning hole; Each filler cage is fixed by an outer positioning pin passing through the outer sliding sleeve positioning hole and the outer sidewall positioning hole, so that the outer sliding sleeve and the outer sidewall are fixed to each other; or, each filler cage is fixed by an inner positioning pin passing through the inner sliding sleeve positioning hole and the inner ring sidewall positioning hole, so that the inner sliding sleeve and the inner sidewall are fixed to each other; The filler cages with the outer sliding sleeve and the outer sidewall fixed to each other are alternately arranged with the filler cages with the inner sliding sleeve and the inner sidewall fixed to each other.

2. The rotating cage filter basin of claim 1, wherein, A water inlet cavity is formed in the lower part of the cylindrical shell.

3. The rotating cage filter basin of claim 1 wherein, A dosing container is arranged on the upper end of the rotating shaft for adding reagents, the dosing container is provided with a dosing pipe, and the dosing container rotates with the rotating shaft to uniformly add reagents into the sedimentation zone.

4. The rotating cage filter tank of claim 3, wherein, A sludge discharge pipe is arranged at the bottom of the sedimentation zone.

5. The rotating cage filter tank of claim 3 wherein, A water outlet pipe is arranged on the side of the sedimentation zone.

6. The rotating cage filter basin of claim 1 wherein, A roller is arranged at the bottom of the outer sidewall of each filler cage.

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