Back-flushing sand filtering pool

Abstract

The present invention relates to a back-flushing sand filtering pool comprising a pool body, a filtering pool, a pier stud and a pollutant discharging device, wherein the pollutant discharging device comprises an arch-shaped filter, a pollutant storage tank, a pipeline, a valve and a pollutant discharging pump; the bottom of the pool body is connected with the pollutant storage tank; the pollutant storage tank is connected with the pipeline; the valve and the pollutant discharging pump are arranged on the pipeline; and the arch-shaped filter is arranged between the bottom of the pool body and the pollutant storage tank. The back-flushing sand filtering pool is particularly suitable for small water body seawater filtering; seawater is discharged after filtering and clarification from bottom to top, a defect that tiny impurities in filtering layer filler fall down to pollute the seawater can be effectively avoided, furthermore, the pollutant discharging device is additionally arranged, so that precipitates can be discharged timely and effectively, and thus the purity degree and the filtering speed of filtered seawater can be ensured.

Description

technical field [0001] The invention belongs to the technical field of water purification, in particular to a recoil sand filter. Background technique [0002] Water quality is an important factor affecting the effect of seawater algae culture. In the cultivation stage, algae have higher requirements on water quality and are sensitive to irritants, and a little carelessness will lead to large-scale death. The water body for cultivating seawater algae often comes from the sea around the cultivation area. The seawater contains suspended impurities, and may also contain pathogenic bacteria, parasites, etc., so it is very necessary to carry out sedimentation, filtration, and sterilization treatment on the imported seawater. . In seawater algae cultivation in small water bodies, suspended solids and impurities in seawater are often filtered through sand filters. [0003] Currently commonly used gravity sand filters, such as the structure disclosed in patent application 2015207...

AI Technical Summary

Problems solved by technology

However, as the filtering capacity increases, more and more suspended solids are retained by the filter layer, not only will there be more and more bacteria and harmful organisms in the filter layer, but the filtering effect will become worse and worse, and the cleaning of the filter layer is very difficult. Convenience, very limited lifespan

[0004] A new type of sand filter has appeared on the market. As disclosed in patent application 201020171965.4, the raw water is filtered and clarified from bottom to top and then discharged. However, this sand filter cannot effectively deal with the impurities deposited at the bottom of the sand filter. After a long time, impurities will block the filter layer, seriously affecting the filtering effect, and it is very difficult to clean the sediment in the sand filter, which is inconvenient to operate

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