SU1068026A3 - Apparatus for purifying effluents containing fatty and oily substances and for compacting deposits - Google Patents

Abstract

In an apparatus for treating contaminated liquid comprising a flotation tank 3 adjustably mounted above a saturation chamber 1 and connected thereto by a spiral conduit 2, coagulant is added to the contaminated liquid and the latter is saturated with air, in the saturation chamber, under a predetermined pressure and for a predetermined time, the liquid then flows slowly through the conduit 2 under conditions which promote agglomeration of the contaminants and simultaneously the pressure of the liquid is reduced so that microbubbles of air adhere to the agglomerating contaminants casing them to float to the surface of the tank 3 within the cylinder 12. <IMAGE>

Description

1P) (1P.IT

rac l; willow;

j h ;;.)

xp to x.noi 1 edosta

SiieHHe 3 (rfek1 i-i and nose. ;;: l ;; - to

Jlji; -: / a; C: | y; 5 ;; eH--. y: Sr; ; ui.in. ::

VCTj.CH; cT: ie juU о.:, СГ1хИ. i-ОД, сосрИЦЩЩЧХ. (/ - лг.;.; и ;; (. (1.1C in e scho; s: t in a; -;; From ;; cm;: - 1): ax.: l , -; |.

saturatslopy kim ;;,: y. .Crlziou

U.IonHijTci reservoir;, P LRKSRR F-i 1NNGO. ::: - rag: yn; : and: ji.-i. i roydel-oh (DopMbij sssdb: cp ;; -; bri;, .. FLOTRU.IR: by this reservoir, iipii this uiJiC-i and ::; ny peseijByap is supplied with Р0: px; -im PPH .HH, npOivi and rassschei: slg; r well-iiywiii-y and, il and n.cro; r, ate in iyms i IGP and iie; J-: A i RJ; -;

gutter D / gYa OUZODA OSV T SIPOI) x;. p:

xoCTi-i and S.PI5NOY оС) ron;: о; - Р jp yoppp: with the water of the length of the carrier of the fleet; l / stanovlenko-- lkutri to "rhr th cylinder

pipes with adjustable length due to the manufacture of flexible material. The flotation tank 3 is mounted on a supporting structure 18 with adjustable height. At the flocculation fitting 2 there are air vent valves 19 for removing excess gas from the fitting 3.

The device works as follows.

The contaminated fluid is supplied to the saturation chamber 1 with air and coagulants or polyelectrolytes. In the chamber, conditions of complete mixing with simultaneous internal circulation are formed. As a result, intensive dissolution of gas and coagulants or polyelectrolytes in the liquid occurs.

The resulting solution passes through the flocculation-decompression fitting 2. The fluid is mixed under laminar flow conditions in a spiral or sinusoidal form, and during this flow in the upward direction, a continuous decrease in pressure occurs in the fluid. From the solution, microbubbles are created due to the solubility of the gas in the liquid, which create nuclei for the flakes forming around them. The conditions created for the passage of fluid cause the formation of flakes and air bubbles in spatial structures with a specific weight less than the specific gravity of the fluid.

In the flotation tank 3, these structures float to the surface and are removed from there.

The design of the flotation tank circulates the liquid to be purified in order to improve the phase separation effect.

The advantage of the proposed device is the high efficiency of the cleaning process. This results from the fact that almost all particles accumulate in space structures due to the elimination of the factors that prevent this phenomenon, thus breaking the flakes by large air bubbles moving in the liquid does not occur, and the flow conditions of the liquid contribute to combining the flakes rather than their breaking up. The transition of a gas from a soluble to a dispersed state with simultaneous flocculation of impurities causes the complete use of gas supplied to the liquid, which is included in the resulting spatial structures.

A spiral shaped fitting is used for the process.

coagulation flotation. To create appropriate turbulence conditions for the flocculation process, i.e. moderate mixing, the decompression-flocculation fitting is made in the form of a spiral or sinusoidal pipe. This form of fitting provides the required fluid flow conditions favorable for flocculation without the need for a mixing device.

Used 1-: e flexible material. For fitting allows you to adjust the saturation pressure

by changing the height

disposition of the flotation cell without the need for laborious disassembly operations.

The use of valves on the fitting allows the removal of excess air from the system, which can be released in the form of large bubbles. Thus, it is possible to prevent disruption of the flocculation process by these large gas bubbles.

Due to the use of a cylindrical device inside the flotation cell, conditions are provided

complete cross-linking with continuous circulation of the prepared liquid. This provides significantly more favorable conditions for the contact of contaminants with air bubbles.

as well as higher efficiency

WATER PREPARATIONS.

The proposed device is multifunctional, designed to simultaneously hold

the coagulation and flotation process, used both for water purification, wastewater, and for the compaction of sediments.

The device is characterized by a simple design and operation, and preparation.

ii;

I-.

./

.

tilt

Claims (5)

1. DEVICE FOR WASTE WATER CONTAINING FAT AND OILY SUBSTANCES AND SEDIMENT SEALS, containing a source liquid tank, a flotation tank and a saturation chamber, characterized in that, in order to improve cleaning efficiency, the saturation chamber is located below the flotation tank and equipped with a spiral or sinusoidal shape fitting connected to the flotation tank, the flotation tank is equipped with an upper cylinder and a lower cylinder placed in it, a peripheral drain 4 channel for draining the clarified liquid tee and a drain funnel with by a pipeline for the removal of floatable contaminants installed inside the upper cylinder. 2. The device according to claim 1, wherein the fitting is made of flexible material, and the flotation tank is installed with the possibility of moving vertically. 3. The device according to claim 1, wherein the flotation tank is equipped with a lower cylindrical chamber. 4. The device according to claim 1, wherein the drain trough is provided with a recirculation pipe connected to the source fluid reservoir. 5. The device according to claim 1, wherein the fitting is equipped with air vent valves.