360-degree inflow rotation type underwater filter bed device and filtering method

Abstract

The invention relates to the technical field of filtering, and in particular relates to a 360-degree inflow rotation type underwater filter bed device and a filtering method; the filter bed device is arranged below the horizontal plane; an air pipe is arranged in a central pipe; the central pipe is connected to a general water outlet pipe; a driving device and a plurality of filtering units are arranged on the central pipe; the driving device drives the filtering units to rotate in 360 degrees by taking the central pipe as the centre; each filtering unit is composed of a filter bed, an outer cover plate of the filter bed and an inner cover plate of the filter bed; the inner cover plate of the filter bed is arranged on the outer ring of the central pipe; the outer cover plate of the filter bed is arranged on the outer ring of the inner cover plate of the filter bed; the filter bed is arranged between the inner cover plate of the filter bed and the outer cover plate of the filter bed; and a shell is arranged outside the outer cover plate of the filter bed. Compared with the prior art, the 360-degree inflow rotation type underwater filter bed device and the filtering method disclosed by the invention have the advantages that on the premise of having the same occupation area, the filtering area of the 360-degree inflow rotation type underwater filter bed device can be increased by multiple times; simultaneously, filter materials are saved; the filter speed is increased; and the 360-degree inflow rotation type underwater filter bed device is low in requirements of the strength of an outer structure and inflow suspended matters, low in loss of a filtering head, centralized in backwash gas, high in strength and good in filtering effect.

Description

[technical field] [0001] The invention relates to the technical field of filtration, in particular to a 360-degree inflow rotary underwater filter bed device and a filtration method. [Background technique] [0002] In water treatment technology, when the sewage passes through the granular filter material layer, some suspended matter and colloidal substances in it are trapped in the pores or on the surface of the medium. This method of separating insoluble pollutants through the granular medium layer is called granular medium. Filtration, referred to as filtration. The filtration mechanism is currently believed to mainly include: sieve filtration, sedimentation and adsorption coagulation. The scope of application of water and sewage filtration treatment is mainly: ①Removal of turbidity and colloids in raw water; ②Removal of fine biological flocs that have not been removed in the biological treatment secondary sedimentation tank or fine chemical flocs that have not been remov...

AI Technical Summary

Problems solved by technology

[0004] 1) Ordinary fast filter: This is the most commonly used filter at home and abroad, with stable and reliable operation, large resistance water distribution system, and good water quality; but its disadvantages are: many valves, troublesome operation and management, generally used for large , medium-sized sewage plant

[0018] 2) Pollution

[0020] 3) Running sand and leaking sand

[0026] Disadvantages are: one-way filtration, large floor area, the bottom of the entire filter surface must be backwashed with air and water, and the strength of air and water is high;

[0029] Disadvantages are: small interception capacity, low filtration accuracy, low concentration of suspended solids in influent water, frequent backwashing

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