Biological aerated filter for automatically and continuously cleaning filter materials

Abstract

The invention relates to a biological aerated filter for automatically and continuously cleaning filter materials. The biological aerated filter comprises a pond body, wherein one or more vertical filter material circulators; each of the circulators is mainly composed of a filter material cleaner and a clean water guide device; the filter material cleaner comprises a lifting pipe which is internally provided with a water flow disturbance structure; the clean water guide device is internally provided with a guide plate and an overflow tank; a filter material guide hopper corresponding to the lifting pipe is arranged in the bottom of the pond body; the lower end opening of the lifting pipe is positioned in the filter material guide hopper; a central cylinder is arranged on the outer side of the lifting pipe in a sleeving manner; the filter material guide hopper is further internally provided with an integrated gas-water distributor and a filter material distributor. The biological aerated filter provided by the invention realizes automatic cleaning of the filter materials and is simple in structure, convenient to operate, less in power consumption and low in manufacturing and maintenance costs.

Description

technical field [0001] The invention relates to an aerated biological filter tank for automatic and continuous cleaning of filter materials, which belongs to the technical field of sewage treatment. Background technique [0002] Biological aerated filter is a biofilm treatment process widely used in municipal sewage treatment and industrial sewage treatment. The principle of treatment is that when the sewage passes through the filter bed, the organic pollutants in the water are adsorbed, digested, decomposed and removed by the microorganisms attached to the filter material of the bed, so that the sewage is purified; while the microorganisms decompose and remove the pollutants, they continuously As the biofilm grows and reproduces, the biofilm will continue to thicken and cause problems such as blockage of the filter bed and mutual adhesion and "hardening" of the filter material. Therefore, it is necessary to set up a backwashing system for regular cleaning to maintain an app...

AI Technical Summary

Problems solved by technology

The biological aerated filter is generally composed of a filter bed, a water distribution system, an aeration system, and a backwashing system. Most of the current biological filters use a fixed-bed periodic intermittent backwashing mode, which makes the equipment pipeline configuration complicated. , large investment, high self-control requirements, large maintenance workload, large land occupation and unstable operation effect, etc., have always plagued the application of biological filters

Some biofilters with moving bed, because it is difficult to control and limit the excessive growth of biofilm, the biofilm will make the filter materials stick to each other, and there will be local "hardening" of the filter bed, forming an "overhead" phenomenon and the effective movement of the filter bed cannot be realized. and biofilm renewal

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