A star-shaped filter backwash perforated distribution pipe and method

Abstract

The invention provides a star-shaped filter tank back-flushing perforated water distribution pipe and method. The perforated water distribution pipe comprises a water distribution main pipe, water distribution branch pipes, an air distribution main pipe and air distribution branch pipes, the two sides of the water distribution main pipe are symmetrically connected with the water distribution branch pipes; one end of the air distribution branch pipe which is provided with a plug is inserted into 80-85% of the water distribution branch pipe, and the other end of the air distribution branch pipe is connected with the air distribution main pipe; the cross section of the water distribution branch pipe is in a star shape, and a plurality of rows of water outlet holes are formed in the pipe wall along the water flow direction; and a plurality of rows of air outlets are formed in the air distribution branch pipes along the air flow direction. The method comprises the following steps: 1 ) air is introduced into the air distribution main pipe and the air distribution branch pipes to carry out back flushing on the star-shaped filter tank; 2) water is added into the water distribution main pipe and the water distribution branch pipes, air is introduced into the air distribution main pipe and the air distribution branch pipes, the star-shaped filter tank is simultaneously subjected to gas-water back flushing; 3 ) water is introduced into the water distribution main pipe and the water distribution branch pipes to carry out back flushing on the star-shaped filter tank. According to the invention, the back-flushing water distribution of the star-shaped filter can be uniform, the blockage of the filter material can be relieved, and the back flushing effect can be improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection treatment, and in particular relates to a perforated water distribution pipe for backwashing of a star filter tank and a method thereof. Background technique [0002] Filtration has always played an important role as an indispensable part of water treatment. The reason is that the entry threshold of filtration technology is low, the applicability is wide, and it is easy to maintain. Compared with other sewage treatment links such as biological parts, the operating cost is low. During the use of the filter material, after the filter tank has been working for a period of time, the water quality will deteriorate sharply due to the intercepted pollutants penetrating the filter layer, or because the filtration resistance of the filter layer increases to exceed the maximum allowable resistance, it is necessary to use reverse The water flow (from bottom to top) flushes the filter layer, ...

AI Technical Summary

Problems solved by technology

However, the method of separately setting the water distribution pipe and the aeration pipe has a poor mixing effect of gas and water, and the equidistant opening of the circular pipe has no obvious water distribution effect, and the backwashing effect is poor.

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