Quartz-sand filter for deep treatment of sewage

Abstract

The invention discloses a quartz-sand filter for deep treatment of sewage. The quartz-sand filter comprises a filter body, an upper sealing head, a lower sealing head, an upper manhole and a lower manhole, a water inlet and a water outlet, wherein the upper sealing head and the lower sealing head are arranged at the top part and the bottom part of the filter body in sequence; the upper manhole andthe lower manhole are respectively arranged at the top parts of the upper sealing head and the lower sealing head; the water inlet is arranged in the top part of the left side of the filter body andthe water outlet is arranged in the bottom part of the lower manhole; a water distributor is connected at the right side of the water inlet; a plurality of water leaking holes are uniformly opened inthe bottom part of the water distributor, and a coarse filtering net is arranged at the bottom part of the water distributor; a quartz-sand layer is arranged under the water distributor and comprisesa first-stage quartz-sand layer, a second-stage quartz-sand layer and a third-stage quartz-sand layer which are arranged in sequence from top to bottom; the particle diameters of the quartz sand of the first-stage quartz-sand layer, the second-stage quartz-sand layer and the third-stage quartz-sand layer are reduced in sequence; the bottom part of the second-stage quartz-sand layer is arranged obliquely; the third-stage quartz-sand layer consists of a plurality of snake-shaped pipes which are arranged in a side-by-side manner; the upper ends of the snake-shaped pipes are provided with openingswhich are communicated with the oblique bottom parts of the second-stage quartz-sand layer.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a quartz sand filter used for advanced treatment of sewage. Background technique [0002] In order to make the sewage meet the water quality requirements for drainage of a certain water body or reuse, and purify it. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and it is also increasingly entering the daily life of ordinary people. At present, urban domestic sewage discharge is the main source of water pollution. According to the classification of sewage sources, sewage treatment is generally divided into production sewage treatment and domestic sewage treatment. Production sewage includes industrial sewage, agricultural sewage and medical sewage, etc., while domestic sewage is sewage produced in daily life, which r...

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Problems solved by technology

[0004] The existing quartz sand filter has the following defects: 1. After a period of use, the upper layer of quartz sand in the filter is easily adhered by sticky dirt, and it is easy to harden if it is not cleaned for a long time, which affects the pass rate and reduces the filtration efficiency ;2. The design of the filter layer is unreasonable. Generally, quartz sand is filled into the filter body. The filtration effect of sewage is generally related to the length of the path it passes through and gr

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