SU1142450A1 - Apparatus for purification of waste water - Google Patents

Abstract

A DEVICE FOR CLEANING WASTE WATERS, comprising a casing, a centrifugal separation chamber, a flotation chamber with a spout discharge pipe, an air supply manifold and an aerator, which is designed to intensify sewage treatment, the bottom of a horizontal perforated partition, a thin-layer module and tangential nozzles for draining purified water from the flotation chamber into the centrifugal separation chamber, the air intake manifold is made of a ring th ducts with radial and tangential recesses and aerator vsholnen as baskets with perforated walls and the variable curvature is set in the tangential recesses collector.

Description

1ЧЭ 01 The invention relates to wastewater treatment methods and can be used to purify wastewater from beet sugar factories and other industries. A known wastewater treatment plant includes a housing, a centrifugal separation chamber with a tangential branch pipe for supplying the treated sewage water and a branch pipe for settling contaminated soil, a flotation chamber with an air supply collector, an aerator and a branch pipe for discharging floating dirt lj. A disadvantage of the known installation is a low degree of wastewater treatment in the presence of sand and surfactants in them, since puff of air entering the centrifugal separation chamber through the mesh wall of the flotation chamber will cause abundant foaming, which is not desirable. removal of foam from the centrifugal separation chamber. In addition, in a known installation, sand is discharged together with other worn soils, which complicates its subsequent processing. The purpose of the invention is to intensify the purification of waste water. This goal is achieved in that the device comprising a housing, a centrifugal separation chamber, a flotation chamber with a pop-up discharge pipe, an air supply collector and an aerator, the flotation chamber is provided with a horizontal perforated partition located in its lower part, a thin-layer module and a tangent sleeve for outlet purified water from the flotation chamber into the centrifugal separation chamber; the air supply collector is made of annular air with radial air and tangential depressions; The torus is in the form of boxes with perforated walls of variable curvature and is installed in the tangential recesses of the collector. FIG. 1 shows the proposed installation; figure 2 - section aa in Fig .; on fig.Z - node 1 in figure 2. The installation includes a housing 1, a flotation cell 2 and a centrifugal separation chamber 3. The flotation chamber 2 has a tangential nozzle 4 supplying treated water, a vertical 1 0 air supply manifold 5, radial air inlets 6, a circular peripheral distribution manifold 7 with tangential depressions 8 equipped with ducts with a perforated wall 9 of variable curvature, having openings 10 for air distribution, as well as the pipe 11 removal of foam. At the bottom of the chamber, the flotation chamber 2 is equipped with a horizontal perforated partition 12, a thin layer module 13 and tangential nozzles 14 for draining sewage into the chamber 3 of a centrifugal separation, which has a nozzle 15 for sand, a tray 16 for collecting waste water and a nozzle 17 for draining waste water. The installation works as follows. The treated wastewater through the pipe 4 under the pressure is fed into the flotation chamber 2, thereby acquiring a circular motion .. Air is supplied through a vertical manifold 5 and radial ducts 6, and distribution - aerators made in the form of perforated walls 9 of variable curvature, located in tangential depressions 8 of the circular peripheral collector 7, thereby achieving a uniform distribution and helical movement of air bubbles throughout the entire volume of the flotation chamber. The air flow, meeting the resistance of the water, is broken up into small bubbles that saturate the waste water and rise up, adsorb to yourselves a knowledge base — surface-active substances, suspended and dissolved organic substances. The circular movement of air bubbles lengthens their path and, thus, s increases the probability of collision of puffs with contaminants, as a result of which the degree of waste water increases. In addition, the tangential air supply results in a strong mixing of water at the bottom of the Flot & As a result of this, the sand particles, colliding with each other, are cleaned; from organic contaminants that are adsorbed on air bubbles, they are floated and removed together with the foam through the nozzle 11. Treated in the flotation chamber 2. waste water passes through horizon

a perforated steel partition 12, designed to stabilize the flow, and a thin layer module 13, in which the separation of air bubbles occurs. In this way, air bubbles are prevented from entering the centrifugal separation chamber 3 and pricing in this chamber. Further, the waste water through tangential nozzles 14, acquiring a circular motion, enters the chamber 3.

The sand under the action of centrifugal forces moves along rests close to the cylindrical surface of the housing 1 and collects in the conical part of chamber 3. The remaining stream of waste water moves to the cylindrical part of chamber 2 of the flotation 2, falls into. a tray 16 serving for collecting the treated wastewater and discharged through the pipe 17. The settled sand is discharged through the pipe 15.

Equipment flotation chamber tangential nozzles supply and removal of waste water, horizontal perforated partition, thin-layer module, aerators in the form of perforated walls of variable curvature, located in the tangential recesses of the circular peripheral collector, equipped with

radial air ducts, allows to significantly intensify the process of wastewater treatment. In addition, the proposed installation is simple and economical to operate.

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Claims (1)

DEVICE FOR WASTE WATER TREATMENT, comprising a housing, a centrifugal separation chamber, a flotation chamber with a pop-up discharge pipe, an air supply manifold and an aerator, which, in order to intensify wastewater treatment, the flotation chamber is provided with a bottom flotation chamber parts of a horizontal perforated partition, a thin-layer module and tangential nozzles for draining purified water from the flotation chamber to the centrifugal separation chamber, the air supply manifold is circular with dial ducts and tangential recesses, and the aerator is made in the form of boxes with perforated walls of variable curvature and installed in the tangential recesses of the collector. SU ,. 1142450 ί