Variable-volume sewage interception and acceptance solid-liquid separator and method thereof

Abstract

The present invention discloses a volume-variable solid-liquid separating device with functions of sewage capturing and dirt accepting, and a separating method thereof. The solid-liquid mixture to be separated flows(down-to-up or up-to-down) through the filtering medium which is compressed to have a height equal to 60% to 90% of the natural filling height. With the increase of captured solid phases, a shaft lifting driver drives a lifting shaft to lift a compress screen, and the height of the filtering medium increases gradually. When the height of the filtering medium reaches 90% of the natural filling height, the compress screen is lifted to the highest position, the filtering medium is loosened completely, at the same time, reverse flushing gas is charged from the intake pipe for a period of 10 to 15 minutes, after the reverse flushing, the compress screen is lowered to compress the filtering medium for refiltration. As a result, the invention has a fast filtering speed reaching a level of 45m / h, sewage capturing speed is increased while the pressure drop loss is decreased; the reverse flushing is complete while the water consuming is less; the operation is simple, and complete auto-control can be realized.

Description

technical field [0001] The invention relates to the technical field of solid-liquid separation, in particular to a variable-volume solid-liquid separation device for intercepting and containing pollutants and deep filtration and a method thereof. Background technique [0002] Solid-liquid separation is an essential process in the water treatment process. In the field of water supply, sedimentation and depth filtration are mainly used, while in the process of sewage treatment, the solid-liquid separation methods mainly include gravity sedimentation and air flotation separation. The specific application of the gravity sedimentation method is the sedimentation tank, the primary sedimentation tank, etc. The main disadvantages are (1) the solid-liquid separation efficiency of the sedimentation tank is low; (2) the effluent contains suspended solids, the effluent water quality is not ideal, and sludge bulking is prone to occur , Sludge floating phenomenon, resulting in unstable ef...

AI Technical Summary

Problems solved by technology

[0004] The main factor affecting the depth filtration technology is the filter media. The currently used filter media are mainly granular filter media and fiber materials with different characteristics. Both have their own advantages. The granular filter media is easy to backwash and has better filtration integrity. The medium specific surface area is small, the filtration rate is small, and the interception capacity is small

The fiber filter medium has a large specific surface area and a small bulk density, so the filtration rate is large and the interception capacity is large, but backwashing is difficult, and the trapped particles are easy to accumulate on the surface of the filter medium, resulting in a large pressure drop loss and serious loss of fiber bundles.

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