Small fast filter tank equipped with air-water backwashing system and its filtration and backwashing process

Abstract

The invention discloses a small fast filter tank equipped with an air-water backwashing system, which includes a filter tank main body, and is characterized in that a filter material layer is arranged inside the filter tank main body, and a water distribution and air distribution pipe is arranged at the bottom of the filter material layer. The trachea is also used as a water collection device and a water distribution and gas distribution device for air-water backwashing. There are backwashing air holes on the top and side walls of the water distribution air pipe, and backwashing water holes at the bottom of the pipe. From the bottom to the top of the filter, there are lower support layer, water distribution pipe, upper support layer, and filter material layer. One side of the filter is connected to the water inlet channel, and the other side is passed through the water distribution pipe and the water distribution chamber. One end of the water inlet channel is provided with a water inlet pipe, the other end is provided with a backwash drain pipe, one end of the water distribution and air distribution chamber is provided with a backwash air pipe and a backwash water pipe, and the other end is provided with a water outlet pipe. When the fast filter is running, the filtration rate is 8m / h, the filtration cycle is 24~48h, and the treated water volume is 700m 3 / d. According to the water supply demand, multiple sets of fast filters can be set up to operate in parallel, which is convenient for capacity expansion and basically requires no civil engineering.

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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