Sewage filtering device

Abstract

The utility model discloses a sewage filtering device which comprises a filtering box and a filtering hopper arranged at the upper end of the filtering box, a spiral conveyor is arranged on the filter hopper; the spiral conveyor comprises an inclined tube shell, a rotating shaft rotationally mounted on the tube shell, a spiral blade fixedly connected to the rotating shaft and a driving motor fixedly connected to the left end of the tube shell, and the output end of the driving motor is fixedly connected with the rotating shaft; a feed port is formed in the left end of the tube shell, and a discharge port is formed in the right end of the tube shell; the feed port is positioned in the filter hopper and is as wide as the filter hopper; the front side of the feeding hole is fixedly connected with the inner wall of the filter hopper; the front side of the filtering pore plate is fixedly connected with the rear side of the feeding hole, and the rear side of the filtering pore plate is fixedly connected with the inner wall of the filtering hopper. The utility model has the advantages that all large-volume garbage and impurities can be thoroughly separated from sewage, so that water entering the filter box does not contain large-volume garbage.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment equipment technology, and in particular to a sewage filtration device. Background Technology

[0002] Wastewater filtration systems are devices used to purify polluted water sources, removing pollutants such as suspended solids, harmful substances, and microorganisms through physical, chemical, or biological methods. These systems typically include a pretreatment stage (such as screens and grit chambers), a primary treatment stage (such as activated sludge processes and biofilm processes), and an advanced treatment stage (such as activated carbon adsorption and reverse osmosis), ultimately ensuring the water quality meets discharge standards or reuse requirements. The design and configuration of wastewater filtration systems vary depending on the application scenario to adapt to specific wastewater treatment needs.

[0003] Chinese utility model patent publication number CN 221522182 U discloses a filtration device for municipal wastewater treatment. This device employs a uniquely designed V-shaped filter conveyor belt to treat wastewater entering the filter tank, effectively removing garbage and impurities. While this V-shaped filter conveyor belt can perform preliminary purification of wastewater during operation, its surface-distributed filter holes easily trap larger debris such as tree branches. When these debris move to either end of the conveyor belt, mechanical jamming is highly likely, increasing the resistance of the entire system and affecting the smoothness of the filtration process. Furthermore, when the filter holes carrying debris rotate to the lower position, due to gravity and the impact of the continuously flowing new wastewater, some of the previously trapped debris is washed off and falls back into the filter tank. This not only fails to completely remove pollutants from the wastewater but may also reduce the overall filtration efficiency, making it difficult for the final effluent quality to meet the expected standards. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a sewage filtration device.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A wastewater filtration device includes a filter box and a filter hopper disposed at the upper end of the filter box; a screw conveyor is disposed on the filter hopper; the screw conveyor includes an inclined tube shell, a rotating shaft rotatably mounted on the tube shell, helical blades fixedly connected to the rotating shaft, and a drive motor fixedly connected to the left end of the tube shell and whose output end is fixedly connected to the rotating shaft; a feed inlet is disposed at the left end of the tube shell and a discharge outlet is disposed at the right end; the feed inlet is located inside the filter hopper and is the same width as the filter hopper; the front side of the feed inlet is fixedly connected to the inner wall of the filter hopper; it also includes a filter perforated plate inclinedly disposed inside the filter hopper, the front side of the filter perforated plate being fixedly connected to the rear side of the feed inlet, and the rear side being fixedly connected to the inner wall of the filter hopper.

[0007] Preferably, the filter box is provided with a support, and the upper end of the support is connected to the tube shell.

[0008] Preferably, the tilt angle of the filter plate is 30°-60°.

[0009] Preferably, the tube shell and the tube wall located inside the filter bucket are provided with water filter holes.

[0010] Preferably, the holes on the filter plate are circular or elliptical.

[0011] The above technical solution has the following advantages:

[0012] This invention employs a filter plate with a large inclined angle to achieve preliminary filtration of larger debris and impurities in wastewater. Debris that cannot pass through the small apertures of the filter plate is guided into the screw conveyor by its own weight and the impact force generated by the flowing wastewater. Once inside the screw conveyor, the filtered material is lifted and eventually discharged from the system. During the lifting process, the screw conveyor effectively reduces the amount of residual wastewater in the filtered material, allowing excess water to naturally flow back to a lower position on the left side of the screw conveyor under gravity. When the accumulated wastewater level inside the screw conveyor exceeds the height of the lower edge of the filter plate, this wastewater re-enters the filter box for further purification. This design ensures that all larger debris and impurities are thoroughly separated from the wastewater, guaranteeing that the water entering the filter box is free of large debris. Furthermore, because the filter plate is continuously cleaned by the flowing wastewater, it does not accumulate excessive debris, avoiding the clogging problems common in traditional filtration devices and improving the overall system's operating efficiency and stability. Attached Figure Description

[0013] Figure 1 This is the front view of the present invention;

[0014] Figure 2 for Figure 1 Enlarged sectional view of the center line AA;

[0015] Figure 3 This is a top view of the present invention;

[0016] Figure 4 for Figure 3 Enlarged view of section B;

[0017] Figure 5 This is a perspective view of the present utility model;

[0018] In the picture:

[0019] 1-Filter box, 2-Filter hopper, 3-Tube shell, 4-Rotating shaft, 5-Spiral blade, 6-Drive motor, 7-Inlet, 8-Outlet, 9-Filter plate, 10-Support, 11-Filter holes. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] As shown in the attached figure, a wastewater filtration device includes a filter box 1 and a filter bucket 2 disposed at the upper end of the filter box 1; a screw conveyor is disposed on the filter bucket 2; the screw conveyor includes an inclined tube shell 3, a rotating shaft 4 rotatably mounted on the tube shell 3, a screw blade 5 fixedly connected to the rotating shaft 4, and a drive motor 6 fixedly connected to the left end of the tube shell 3 and the output end fixedly connected to the rotating shaft 4; a feed inlet 7 is disposed at the left end of the tube shell 3 and a discharge outlet 8 is disposed at the right end; the feed inlet 7 is located inside the filter bucket 2 and is the same width as the filter bucket 2; the front side of the feed inlet 7 is fixedly connected to the inner wall of the filter bucket 2; it also includes a filter perforated plate 9 inclinedly disposed inside the filter bucket 2, the front side of the filter perforated plate 9 being fixedly connected to the rear side of the feed inlet 7 and the rear side being fixedly connected to the inner wall of the filter bucket 2.

[0022] As a further improvement to this embodiment, a support 10 is provided on the filter box 1, and the upper end of the support 10 is connected to the tube shell 3. By providing the support 10 to support the tube shell 3, the stability of the tube shell 3 is improved.

[0023] As a preferred technical solution in this embodiment, the tilt angle of the filter plate 9 is preferably 30°-60°. With a larger tilt angle, the sewage falls quickly, which can prevent large-volume garbage from clogging the filter plate 9.

[0024] As a further improvement to this embodiment, the tube shell 3 and the tube wall located inside the filter bucket 2 are provided with water filter holes 11. The water filter holes 11 can discharge the sewage in the tube shell 3, further reducing the water content in the filtered material (large volume garbage and impurities).

[0025] In this embodiment, the holes on the filter plate 9 are circular, but obviously they can also be elliptical or other shapes.

[0026] During operation, municipal sewage enters from the rear end (higher end) of the filter plate 9, where it performs preliminary filtration of larger debris and impurities. Debris that cannot pass through the small apertures of the filter plate 9 is forced through the inlet 7 into the casing 3 by its own weight and the impact force generated by the flowing sewage. Once inside the screw conveyor, the filtered material is lifted and eventually discharged from the system. During the lifting process, the screw conveyor effectively reduces the amount of residual sewage in the filtered material, allowing excess water to naturally flow back to the lower left side of the screw conveyor under gravity. When the accumulated sewage level inside the screw conveyor exceeds the height of the lower edge of the filter plate 9, this sewage re-enters the filter box 1 through the filter plate 9 for further purification. This design ensures that all larger debris and impurities are thoroughly separated from the sewage, guaranteeing that the water entering the filter box 1 is free of large debris.

[0027] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A sewage filtering device comprising a filtering box (1) and a filtering hopper (2) arranged at the upper end of the filtering box (1); characterized in that: The filter hopper (2) is provided with a screw conveyor; the screw conveyor comprises an obliquely arranged tube shell (3), a rotating shaft (4) rotatably installed on the tube shell (3), a spiral blade (5) fixedly connected to the rotating shaft (4), and a driving motor (6) fixedly connected to the left end of the tube shell (3) and having an output end fixedly connected to the rotating shaft (4); the left end of the tube shell (3) is provided with an inlet (7), and the right end is provided with an outlet (8); the inlet (7) is located in the filter hopper (2) and has the same width as the filter hopper (2); the front side of the inlet (7) is fixedly connected to the inner wall of the filter hopper (2); the filter hopper (2) further comprises a filter hole plate (9) obliquely arranged in the filter hopper (2), the front side of the filter hole plate (9) is fixedly connected to the rear side of the inlet (7), and the rear side is fixedly connected to the inner wall of the filter hopper (2).

2. The sewage filtering device according to claim 1, characterized in that: The filter box (1) is provided with a support (10), and the upper end of the support (10) is connected to the tube shell (3).

3. A sewage filtering device according to claim 1 or 2, characterised in that: The inclination angle of the filter hole plate (9) is 30°-60°.

4. The sewage filtering device according to claim 1 or 2, characterized in that: The tube shell (3) is provided with a water filtering hole (11) on the tube wall located in the filter hopper (2).

5. The sewage filtering device of claim 3, wherein: The tube shell (3) is provided with a water filtering hole (11) on the tube wall located in the filter hopper (2).

6. The sewage filtering device according to claim 1 or 2, characterized in that: The holes on the filter hole plate (9) are circular or elliptical.

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