Polystyrene foam filter bead filter tank and flushing method thereof

Abstract

The invention discloses a polystyrene foam filter bead filter tank and a flushing method thereof. The polystyrene foam filter bead filter tank is characterized in that the interior of a filter tank body is divided into a clean water tank, a clean water area, a filter layer and a water distribution area from top to bottom through a partition plate and a filter plate, a water collecting groove is arranged on the inner wall of the tank body in the clean water area, short-handle filter heads are uniformly distributed on the filter plate, a raw water pipe and an air flushing pipe are introduced into the bottom of the water distribution area in the tank body, the water collecting groove is communicated with the interior of the clean water tank through a connecting pipe, a clean water pipe is introduced into the top in the clean water tank, one end of a primary filtered water discharge pipe is in butt joint with the connecting pipe, one end of a flushing wastewater discharge pipe is in butt joint with the raw water pipe, and the air inlet end of an exhaust pipe extends into the clean water area and is located at the position close to the partition plate. The filter tank has the characteristics of low operation cost, high filtering speed, uniform particle size of the filter material, strong sewage interception capability and good effluent quality, and the flushing method developed by taking the filter tank as an object has the advantages of good flushing effect, low energy consumption and the like.

Description

Technical field [0001] The present invention belongs to the field of research and development of drinking water treatment devices, and more particularly to a polystyrene foam filter bead filter and its flushing method. Background technique [0002] Traditional quartz sand filters have an important role in drinking water treatment, but there are also the following defects: (1) The price and operation cost of the quartz sand filter is high due to the price of quartz sand, the quartz sand filter is high; (2) If the high-speed water flow is reversed, the entire filter layer will show a significant "hydraulic grade" phenomenon after the end of the rinsing, and the interceptability of the filter layer will be greatly reduced; (3) Even so-called "homogeneous filter materials" However, relatively, the filter layer will still have a certain degree of "hydraulic grading" phenomenon, the interception capacity of the entire filter layer is still limited; (4) Due to the large specific gravity...

AI Technical Summary

Problems solved by technology

[0002] The traditional quartz sand filter plays an important role in drinking water treatment, but it also has the following defects: (1) Because the price of quartz sand used as filter material is relatively expensive, the construction and operation costs of the quartz sand filter are relatively high; (2) If the high-speed water flow backwashing method is used, the entire filter layer will show an obvious "hydraulic classification" phenomenon after the flushing, and the pollution interception capacity of the filter layer will be greatly reduced; (3) Even the so-called "homogeneous filter material" can Only relatively speaking, the filter layer will still have a certain degree of "hydraulic grading", and the sewage interception capacity of the entire filter layer is still relatively limited; (4) due to the large proportion of quartz sand, the resistance during flushing is relatively large, and the energy consumption is high. higher

The filter is suitable for filter materials with a density close to that of water (for example, a density of 700-850kg / m 3 Lightweight diatomite ceramsite, etc.) have a good flushing effect, but for filter materials with too small density (for example, the density is 15-20kg / m 3 styrofoam beads) are less effective in rinsing

Because the density of polystyrene foam filter beads is too small, even if the liquid level drops to a certain distance below the filter plate, the entire filter layer is still squeezed under the filter plate under the buoyancy of water, and the pollutants trapped in the filter material layer hard to clear

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