Backwashing method of upward flow filter and backwashing water distribution structure

Abstract

The invention relates to a backwashing method of an upflow filter chamber and a backwashing water distribution structure. The method orderly comprises: single water washing, combined washing of air and water, and single water rinsing. The water distribution structure is composed of an air intake pipe arranged on the near bottom of the filter chamber and connected with an air distribution and water distribution system at the lower part of a filter material layer in the filter chamber, an original water intake pipe and a washing and water discharging pipe, wherein, an air valve on the air intake pipe, a water intake valve on the original water pipe, and a first water discharging valve on the washing and water discharging pipe are provided with water distribution devices for washing on the upper part of the filter material layer in the filter chamber; each water distribution device consists of a plurality of horizontal main pipes which are communicated with a clean water channel at one side of the filter chamber by a connection pipe through the upper part of the side wall of the filter chamber; each main pipe is evenly provided with a plurality of water distribution nozzles; one end of each main pipe is closed, and the other end penetrates through the chamber wall of the filter chamber and is connected to a second water discharging channel to the water discharging channel. The cleaning capability of the filter materials of the upflow filter chamber is largely improved. In addition, the water quality of water discharging is better. The invention solves the problems of discharging water polluted by backwashing discharging water filtered by the existing upflow filter chamber, and the problem of first filter water discharging.

Description

technical field [0001] The invention relates to a deep-bed filter tank with granular filter material, in particular to a backwash method for an upward flow filter tank and a backwash water distribution structure. Background technique [0002] Filters are the most important processing structures in water purification applications. The filter is to remove the particulate suspended impurities in the water through the interception and adsorption of the filter material in the pool. When the amount of impurities retained by the filter material reaches a certain level, that is, after reaching the saturation of the filter material, it needs to be cleaned by backwashing. The filter material is regenerated so that it can be reapplied in the filtration process. At present, the filtration can be divided into two types of filtration: upflow filtration and downflow filtration. The upflow filter is a form of filtration in which the water to be filtered enters from the bottom of the filte...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the unreasonable current situation of the backwash method of the existing upward flow filter, to provide a backwash method and backwash water distribution structure of the upward flow filter, so that the filter material of the upward flow filter can be flushed more efficiently. clean, less water consumption

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