SU1194847A2 - Waste water purification plant - Google Patents

Abstract

A DEVICE FOR CLEANING WASTE WATER according to bus No. 1084251, characterized in that, in order to reduce the duration of washing the grains, the filter loading from the contaminants, excluding the air filter and reducing the washing water, is equipped with a coalescing filter placed between the flotation chamber and loading of particles of granular materials with a particle size of 40-60 mm, which has a supporting) its lattice. (L; o 00 .Yi 1

Description

The invention relates to combined devices for wastewater treatment by pressure flotation and filtering from petroleum products, fats, suspended and powdered active substances ^ ..- '' · '·' V

The goal is to improve the efficiency of bottom water treatment, to reduce the duration of the long washing of filter load grains from contaminants, and to prevent the filter from strangling and to reduce the volume of washing water.

The drawing shows the proposed device, a longitudinal section.

The device includes a housing 1, ru 2 flocculation, a chamber 3, a semisubmersible baffle layer of coalescing charge 5 with aunt 6, a quick filter 7, an annular distributor 8 of the water-air mixture, made in the form of an inverted trough with a perforated wall, a peripheral tray 9 for supplying the initial wastewater, tray 10 for removal of wash water and coarse particles, distribution system 11 for filtrate removal and supply of washer water, tray 12 and pipe 13 for dumping and removing foam product scraping mechanism 14 for driving off kamefllo4, pe2 Recreatives Products which scraper mechanism 14 is guided into the tray 12 and through conduit 13 udalyaetsya'na dehydration. An annular distributor 8 of air-water mixture or air with a perforated upper wall allows you to create an upward gas-liquid flow, preventing the penetration of large neflotiruyuschey pollution on the filter.

Freed from contamination, the waste fluid passes through the thickness of the annular conical layer of the air-water mixture and enters the layer of coalescing charge 5, located. worn on the grate 6, where oil grains are accumulated and coarsened on the grains, which, under the action of a lifting (Archimedean) force, are carried into the flotation chamber 3 and then into the foam layer. When water is filtered through a coalescing charge, the final degassing of the water takes place, and the air bubbles formed during this process are not delayed in the charge;

The presence of a coalescing charge in the space between the flotation chamber and the filtrate makes it possible to additionally extract petroleum particles on the grains, protecting the fast filter of the sewage liquid, thereby improving the filtration capacity of the load, excluding clogging of the loading pores, and reducing the flow rate of washing water due to washing of the filtrate with an upward flow in coalescing loading layer, where due to the high abrasive action a more intensive washing of the filter load from contamination occurs Nij, which reduces the washing time, and thus significantly reduces the consumption of washing water.

Claims (1)

DEVICE FOR WASTE WATER CLEANING according to Autost.No.1084251, characterized in that, in order to reduce the duration of washing the filter load grains from contaminants, to exclude filter airing and reduce the volume of washing water, it is equipped with a coalescing charge placed between the flotation chamber and the quick filter from particles of granular materials with a particle size of 40-60 mm, having a supporting grid. * 1194847