High-efficiency washing method and device for filter adopting expansive filler

Abstract

The invention discloses a high-efficiency washing method and a high-efficiency washing device for a filter adopting expansive fillers. The structure and working process comprise that: a valve for water inlet, a valve for normal water outlet and a valve for aeration are closed; a water level in the filter is reduced to a washing water level through drainage, wherein the washing water level is lower than a normally working water level; a valve for washing water inlet and a valve for washing aeration at the lower part of the filter are opened and a purification device in the filter is washed by using upward water flow and airflow; and the washing water is discharged from a washing water outlet at the bottom end of a washing water receiving tank outside the top end of the filter. The invention has the advantages that: due to reduction of the water level in the filter, the reduced water level washing reduces pressure needed by a washing water pump and a washing fan and the energy are saved; the reduced water level washing is to reduce the water level in the filter first to provide an expansion area for activated carbon, so that the activated carbon rolls to form friction on the part below the normal water level in the process of washing. Therefore, the biofilm is separated and flows out of the system along with the washing water, and the washing effect is improved.

Description

technical field [0001] The invention relates to a high-efficiency flushing method for all filters using expansive fillers (such as biological aerated filters, activated carbon filters and activated carbon adsorption ponds, etc.), and a special device for implementing the method, which is suitable for polluted river water , Treatment of slightly polluted rivers and lakes, and can also be used in the construction of high-quality reclaimed water plants. Background technique [0002] There are various forms of pollutants (dissolved, suspended, colloidal substances, microorganisms, etc.) in polluted rivers, slightly polluted rivers and lakes. When using biological activated carbon purification pools or aerated biological filters, activated carbon filters and activated carbon adsorption pools During treatment, after running for a period of time, the amount of biofilm on the filter material gradually increases, the resistance to water increases, and the filtration rate decreases. W...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-efficiency flushing method and device for all filter tanks using expansive fillers, so as to solve the problems of high energy consumption and low flushing effect in the prior art

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