SU1623968A1 - Apparatus for purification of oil-containing effluents - Google Patents

Abstract

The invention relates to devices for the flotation treatment of wastewater and can be used in the mechanical and physicochemical treatment of contaminated petrochemical effluents. The purpose of the invention is to increase the efficiency of wastewater treatment from petroleum products and eliminate the removal of suspended particles with purified water. The device includes a housing, a water distributor, made in the form of coaxially installed extras. The invention relates to devices for the flotation treatment of wastewater and can be used for mechanical and physico-chemical cleaning 1 of oil-contaminated wastewater. The purpose of the invention is to increase the efficiency of wastewater treatment from petroleum products and eliminate the removal of suspended particles (crystalline salts) with purified water. The drawing shows schematically the proposed device for it a cylinder with a tangential inlet pipe of the fluid being cleaned, equipped with a chamber for its treatment with direct current with electrodes, and an internal cylinder. At the same time, the inner cylinder of the water distributor in the upper part is equipped with a confuser with guides placed in it in the form of truncated cones of different heights. In the upper part, at the interface of the water distributor with the confuser, tangentially guiding nozzles are installed, and in the lower part, the sand chamber with the nozzle. The flotation cell contains a system of diffusers mounted one above the other coaxially with the hull, with the upper part of the located diffuser located inside the located above the diffuser with a gap between them. For removal of petroleum products and purified water are annular trays with nozzles. 1 il. with W (L of oil-containing water purification, longitudinal section. The device for purifying oil-containing water contains a cylindrical body 1, a water distributor 2 made in the form of an outer 3 and an internal 4 cylinder coaxially arranged, while the water distributor 2 in the upper part is equipped with a confuser 5 with guides in the form of truncated cones 6 and 7 of different heights. The water dispenser is equipped with tangential coefficients OE 1C 00 CD O 00

Description

guide pipes 8 installed in its upper part at the interface with confuser 5 and sand chamber 9 with branch pipe 10 in the lower part of oil products flotation chamber 1J, made in the form of diffusers 12 installed one above the other coaxially with the housing, while the upper part The downstream diffuser is located inside the upstream diffuser with a clearance of 13 between them. The lower diffuser (the first one in the course of the water movement) is connected directly to the confuser 5, and the upper diffuser is equipped with an annular tray 14 for collecting oil products with the outlet 15 of their outlet. The space between the housing 1 and the diffusers 12 constitutes a settling chamber 16. The housing 1 is equipped with annular trays 17 for collecting purified water and a nozzle 18, the outer cylinder 3 of the water distributor 2 contains the inlet nozzle 19 of the water to be purified connected to it tangentially and equipped with a chamber 20 for treating the treated water direct current with electrodes 21: the anode is made of graphite, the cathode is made of stainless plates, and the space between the outer and inner 4 cylinders of the water distributor is equipped with drainage pipes 22 for removing suspended particles (crystalline salts).

A device for purifying oil-containing water works as follows.

 Purified water through the pipe 10 is supplied to the processing chamber 20 of the 22 e by direct current, equipped with electrodes 21, A voltage of 8-10 volts to the electrodes 21 is supplied from a rectifier (not shown) fed through a transformer. Then, the purified water enters the water distributor 2, where it acquires rotational motion around the inner cylinder 4.

In the chamber 20, electrolysis of the treated water results in the evolution of gases and the formation of crystalline salts. The latter and the suspended particles previously contained in the source water are periodically removed by blowing through the drainage pipes 22, and the emulsion passes through the tangential guide pipes 8 into the internal cavity of the water distribution valve 4 2. Here is the pressure

0

Q 5

"

five

the water being treated is reduced, the air dissolved in water and the gases formed during electrolysis are released.

Then the wastewater rises along Confueor 5, passes between cones 6 and 7. Since the probability of suspended particles (crystalline salts) entering the internal cavity of cylinder 4 of water distributor 2 is not excluded, in this case suspended particles (crystalline salts) due to centrifugal forces are collected in the sand chamber 9, and another part of them settles on the surface of the cones 6 and 7 of the confuser, as they accumulate they enter the sand chamber 9 and periodically are output through the nozzle 10. The water-gas emulsion passes through the annular The gaps of the truncated cones 6 and 7 and falls into the chamber 11 of the flotation of petroleum products. In the condenser 5, the speed of the GERDIC BREEDING gradually increases, maintaining rotational motion, where the oil particles, as the lighter one, spread in the center and then in the diffusers undergo flstatsh: nostril and gas bubbles emitted by the reduction of water accumulation and its electrolysis, enlarged (This is facilitated by a gradual decrease in the rate of ascent of the medium in the diffuse 12), float up into the upper part of the chamber 1 1, collect into the annular tray 14 and are discharged through the nozzle 15.

The water freed from oil products and suspended particles (crystalline salts) in the interface zone of the diffusers 12 changes its direction between itself and through the annular gaps 13 enters the settling chamber 16, collects in the annular tray 17 and is discharged through the pipe 18. Falling of petroleum products into the settling chamber 16 prevent the lower edges of the diffusers 12.

Confueor 5 concentrates the flow of waste water in the central zone of diffusers, increasing the effect of flotation of petroleum products, and the execution of a confuser in the form of truncated cones of different heights creates additional conditions for changing the velocity of the upward flow of the medium, which contributes to the removal of suspended particles (crystalline salts) into the inner chamber 9 of the inner cylinder water distribution

Claims (1)

Formula of the invention A device for the treatment of oily wastewater, including a housing, a water distributor, made in the form of a coaxially mounted external cylinder with a tangential inlet pipe of the liquid to be cleaned, equipped with a DC processing chamber, and an internal 1623968 6 cylinders with tangential guiding nozzles in its upper part and a sand chamber, a diffuser, annular trays for collecting oil products and purified water with nozzles, characterized in that, in order to increase the efficiency of wastewater treatment from oil products and eliminate the removal of suspended particles of purified water, it equipped with a confuser with guides placed in it in the form of truncated cones of various heights, the lower part connected to the inner cylinder of the water distributor, and the upper - with a diffuser, additional diffusers patterns mounted on top of each other coaxially with the body, while the upper part of the upstream diffuser is placed inside the upstream diffuser with a gap between them.