SU1028603A1 - Apparatus for purifying liquid - Google Patents

Abstract

CLEANING DEVICE FOR LIQUID, incl. Case with reception and futon chamber, soothing lattice, electrocoagulator, foam gathering mechanism and suction box. About me with this. what. In order to intensify the cleaning process and simplify the design, the device is equipped with a cylinder with a conical bottom installed coaxially in the flotation cell. PJp lattice and filter material placed on a perforated lattice, while the flotation cell is made with a narrowing in the upper part. "L

Description

The invention relates to devices for the flotation treatment of wastewater and can be used in the oil refining, petrochemical and other fields where it is necessary to purify wastewater from oil products, suspended:. and colloidal substances.

The closest to the invention to the technical essence and to achieve the effect is a device for flotation wastewater treatment, comprising a housing with a receiving and flotation chambers, a soothing latch, an electrocoagulator, a foam scavenging mechanism and a foam collector 1,

However, the known device is not characterized by a high efficiency of wastewater treatment.

The purpose of the invention is to intensify the cleaning process and simplify; designs.

This goal is achieved in that the device for flotation sewage treatment, comprising a housing with a receiving and flotation chambers, a still screen. electrocoagulator, mechanism. it is scooped up by foam and foam collector; it is provided with a cylinder coaxially mounted in the flotation chamber with a conical perforated grid. and filtering material placed on a perforated grate, while the fleet:; ion chamber is made with a narrowing in the upper part.

FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 - the same, top view.

The device consists of a housing 1, a receiving chamber 2. separated by a sedative lattice 3 with apertures 4. on which an electrode system 5 is located (electro-coagulator of a flotation chamber 6 with a foam collector 7 and a device for blowing off foam 8 coaxially installed in the flotation chamber with apertures 9 cylinder 10. made with a conical bottom, a pipe 11 for draining cleaned fluid and filter material 12. placed on a perforated grid 13. A filter chamber 14 is arranged above the filter material. abraded with clamp 15 for supplying the cleaned liquid, fitting 16 for feeding reagents, fitting 17 for withdrawing the foam condensate, horns 18 for installing the device on the foundation.

The device works as follows.

The electrode system 5 is supplied with power from a DC source. The liquid to be treated is fed through the nozzle 15 into the receiving chamber 2.

The passage through the openings 4 of the pacifying grid 3 stabilized flow of the treated liquid enters the megolelectrode space of the electrode system (electrocoagulant) 5. where it is subjected to electrical work. At the same time, the dissolution of the anodes occurs with the formation of metal hydroxides (oxidized) and the expansion of gas bubbles.

Then the liquid enters the flotation cell b, where, together with the liquid flow, gas bubbles rise and suspended substances adhere to them, including flakes of metal hydroxides with sorbed contaminants. Gas bubbles on the surface of the liquid form a layer of foam, which is blown off by a device for blowing foam 8 into a foam container 7, where it is extinguished by known methods (for example, water irrigation or steam treatment). The resulting foam condensate is discharged through fitting 17.

The liquid purified during flotation through the flooded holes 9 in the cylinder 10 is fed for purification of the filter chamber 14. Next, the liquid is filtered through the filtering material 12 made, for example, of syprone, wood fiber chips, polyurethane foam, silica sand, etc.

The purified liquid is discharged through pipe 11 from the device.

Intensive / foaming on the surface of the water mirror, which means. and the formation of a high and stable foam layer is provided by the narrowing of the flotation chamber b in the upper part, which significantly reduces the water surface.

In order to improve the flotation process or to give the treated liquid a neutral reaction, reagents are fed to the device through fittings 16. It is also possible to introduce gases through the same fittings, or a polluted liquid saturated with air to increase the number of gas bubbles in the flotation chamber, i.e. improving the flotation process.

In the case of the absence of metal for electrode plates, the device is used for pressure reagent flotation, for which air saturated and reagent-treated liquid is supplied to fitting 15.

Flushing of the filter is carried out by reverse flow of the clarified liquid, i.e. through pipe 11.

The contaminated water (filtrate) is poured over the side of the cylinder 10 and the orifices 9 into the flotation chamber b, from where it is discharged through the fitting 15. A part of the filtrate is also poured into the sump 7 and discharges through the fitting 17. This rinsing facilitates cleaning of the foam collection tray 7, the electrode the electrode system 5 and the holes 4 of the pacifying grid from the dirt accumulated in them. The proposed device for cleaning liquids allows to achieve high quality cleaning of liquids in one device, significantly reducing the dimensions of known installations and simplifying the process of their operation.

Claims (1)

A LIQUID CLEANING DEVICE, including a housing with a receiving and (flotation chambers, soothing grate, electrocoagulator, foam raking mechanism and foam collector. Characterized in that. In order to intensify the cleaning process and simplify the design, the device is equipped with a conical cylinder installed in the flotation chamber with a conical the bottom of the perforated grate and filter material placed on the perforated grate, while the flotation chamber is made with a narrowing in the upper part.