Small rapid filter equipped with air and water backwash system and filtering and backwashing technology thereof

Abstract

The invention discloses a small rapid filter equipped with an air and water backwash system. The small rapid filter comprises a filter body and is characterized in that the filter body is provided with a filter material layer, and the bottom of the filter material layer is provided with air and water distribution pipes which are also used as water collecting devices and water and air distribution devices for air and water backwashing; and the top and side wall of each water and air distribution pipe are provided with backwashing air holes, and each pipe bottom is provided with backwashing water holes. From the bottom to the top, the bottom of the filter is respectively provided with a lower supporting layer, water and air distribution pipes, an upper supporting layer and a filter material layer. One side of the filter is communicated with an intake canal, and the other side is communicated with the a water and air distribution chamber through the water and air distribution pipes; one end of the intake canal is provided with a water inlet pipe, and the other end is provided with a backwashing drainage pipe; and one end of the water and air distribution chamber is provided with a backwashing air pipe and a backwashing water pipe, and the other end is provided with a water outlet pipe. In operation, the fast filter reaches a filtration rate of 8 m/h, filtration period of 24-48 h, and water treatment amount of 700 m<3>/d. According to water supply demand, multi-group fast filters can be arranged for parallel operation, and the capacity expanding is convenient with basically no building work amount.

Description

technical field [0001] The invention relates to the field of water treatment and purification, in particular to a small fast filter equipped with an air-water backwashing system and its filtration and backwashing process, which can be applied to the filtration and purification process of small-scale water supply systems. Background technique [0002] With the promulgation of new standards for drinking water quality by the Ministry of Health and the Ministry of Construction, all domestic water supply companies will improve the quality of effluent water as a top priority. In the purification process of drinking water, filtration is not only to further reduce the turbidity of water, but also to partially remove organic matter, bacteria and even viruses in the water as the turbidity of the water decreases. important measure. The backwashing of the filter is a key step in the entire filtration project. A good flushing technique can not only effectively remove the sludge in the f...

AI Technical Summary

Problems solved by technology

And at present, in the water supply system in China's small cities and towns, the pollution of water sources is becoming more and more serious, the construction of water supply facilities is not perfect, and the water supply scale is too small. Due to the small scale of water supply in small towns, an integrated technology suitable for the filtration and purification process of small towns has been invented. It has a small footprint, basically no civil engineering volume, and the expansion of water supply scale is simple and easy, so as to ensure the water supply system of small towns the rapid development of

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