SU994014A1 - Unit for filtration cleaning of waste waters - Google Patents

Description

(54) INSTALLATION FOR FLOTATION WASTEWATER TREATMENT

one

This invention relates to wastewater treatment plants by flotation.

A known installation for the purification of contaminated water, containing a funnel-shaped reservoir, in which a central pipe enters to a certain depth. Through the lower open end of this pipe, the reservoir is filled with treated water. The central tube is surrounded by two tubes, by means of which a stream of water is formed from which heavy impurities are separated, 1 1.

The disadvantage of such an installation is insufficient quality wastewater treatment.

Closest to the invention according to the technical essence and the achieved result is a plant for the flotation treatment of wastewater, which includes successively installed chambers for the preparation of the water-air mixture, water distribution

connection and flotation branch pipe 2.

This flotation unit does not have high throughput. The reason is that the adjacent arrangement is flotation. Node and settling chambers cause non-simultaneity in the process of flotation and sludge, and the greater depth of the chambers, which is necessary for flotation processes and sludge, requires a long time of water in the chambers. In addition, this plant has a low efficiency in the treatment of waste water with a high content of petroleum products.

The aim of the invention is to intensify the processes and improve the quality of wastewater treatment.

Claims (2)

The goal is achieved by the fact that in an installation that includes successively chambers of water-air mixture preparation, water distribution with a mixture supply pipe and flotation chamber, the flotation chamber is made in the form of an inclined pipe, the lower end of which is connected to the water distribution camera, and the top NII is plugged, while the pipe is equipped with pipes removal of separated products. The water distribution chamber is provided with a perforated partition placed in the upper part, and the supply pipe for the mixture is made tangential. The drawing shows the proposed plant for flotation sewage treatment. The installation contains a hydrocyclone 1 connected via a pipeline 2 and a tangentially installed nozzle 3 with a conical part of the water distribution chamber kf a perforated partition 5 installed at the beginning of the cylindrical part 6 of the flotation pipe 7, a drain pipe 8 installed at the apex of the cone in the distribution chamber, a system of pipes 9 for removal of the floating oil products and the collecting tank 10, the pipe system 11, the receiver of purified water 12 and the air exhaust pipe 13 installed in the upper part of the flotation cell. The installation works as follows. The water-air mixture from the hydrocyclone on line 1 via line 2. flows through the tangentially mounted nozzle 3 into the conical part of the water distribution chamber k of the tubular floater. The water-air mixture acquires a rotational motion, which contributes to a more complete mixing and its uniform distribution over the entire cross section of the chamber. The Air / Water J j: MeCb then passes through a perforated partition 5, serving as a damper for the speed of rotational motion at the beginning of the cylindrical part 6 of the flotation tube 7. The air / water mixture moves along a sloping tube in a laminar flow. The flotation process takes place in a moving laminar flow in a thin layer of water with a shallow depth of sludge throughout the entire volume of the elementary tube used as a flotation chamber and sludge. Due to the co-emergence of air bubbles and oil particles at the end of the upper part of the inclined plane of the pipe foam oil accumulates and is discharged through the pipe system 9 into the collecting tank 10. The waste water separating from the lower zone 7 is removed also through a system of pipes 11 to the purified water receiver 12. To drain the flotation unit, a drain pipe 8 is installed at the top of the cone of the water distribution chamber. To remove air from the system in the upper part a floatator has an exhaust pipe 13 installed. The proposed plant for the flotation treatment of wastewater makes it possible to intensify the process of flotation treatment. Therefore, with effective flotation, the residence time of the water in the flotation cell is reduced and, accordingly, the size of the flotation unit is reduced, which leads to a simplification of the plant design and its cost reduction. 1. Installation for flotation treatment of wastewater, including successively installed chambers of water-air mixture preparation, water distribution with a mixture supply pipe and flotation, which in order to intensify the process of thin-layer flotation and improve the quality of wastewater treatment, the flotation chamber was made as an inclined pipe, the lower end of which is connected to the water distribution chamber, and the upper one is plugged, and the pipe is equipped with branch pipes for the removal of separated products . 2. The installation according to any one of the preceding paragraphs, 1, and 2 tons, which is connected with the fact that the water distribution chamber is provided with a perforated partition placed in the upper part; Information sources, . taken into account in the examination 1. Japanese Patent No., cl. C 02 C 1/26, 1973. 2. Japanese Patent ff i 7-26873, cl. 72 C 31, 1972.