Filter tank backwashing duration control method and system

Abstract

The invention provides a filter tank backwashing duration control method and system. The method comprises the steps: sequentially carrying out air flushing and water flushing on a filter tank after afilter material in the filter tank is filtered, detecting the turbidity of backwashing wastewater through an online turbidity detection device arranged on a backwashing wastewater tank of the filter tank, stopping water flushing when a detection value is lower than a set value; repeating the steps for several times, and detecting the mud content (expressed by turbidity) of the filter material so as to control the next backwashing duration. The system comprises an online turbidity detection device, a filter material mud content (expressed by turbidity) detection unit, a backwashing water pump and an air pump, wherein the online turbidity detection device and the filter material mud content (expressed by turbidity) detection unit are respectively connected with two sensors, each sensor is connected with controllers of the backwashing water pump and the air pump, and switches of the backwashing water pump and the air pump are controlled through received turbidity information and filter material mud content (expressed by turbidity) information. The method has the advantages of saving water consumption and medicine consumption, and is simple to operate.

Description

technical field [0001] The invention relates to the field of drinking water treatment, in particular to a method and system for controlling backwashing duration of a filter. [0002] technical background [0003] In recent years, with the acceleration of urban construction and the advancement of environmental protection, the quality of drinking water supplied by water purification plants has attracted more and more attention. Filtration is the core unit of the drinking water treatment process and is the final link in the removal of particulate matter and turbidity. The quality of the filtration link (filtered water quality) largely depends on the quality of the filter backwash. Backwashing is very important to the filtration operation: if the backwashing intensity or washing time is not enough, the sludge in the filter layer will not be removed in time. Deterioration; if the backwashing intensity is too large or the duration is too long, not only the water consumption is la...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned problem of filter backwash time control, in order to improve the existing technology, the purpose of the present invention is to provide a filter backwash time length control method and system, which can improve the efficiency of backwash on the basis of existing backwash , enhance the reliability of the backwashing effect, can effectively solve the problem of poor backwashing effect of drinking water plant filters or waste of resources for too long backwashing time, and achieve the purpose of saving energy and reducing consumption

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