SU1470668A1 - Apparatus for electrochemical treatment of waste water - Google Patents

Abstract

The invention relates to devices for the electrochemical purification of water. The purpose of the invention is to reduce energy consumption. A device for the electrochemical treatment of wastewater contains a series-connected electrocoagulator and an electroplator, while in the electrocoagulator a perforated dielectric tube is placed coaxially to its body and connected to an air supply device. The electrocoagulant cathodes of porous graphite are fixed on the dielectric tube, and the anodes are made of aluminum and placed on the body. Electrode pairs - cathode and anode - electrocoagulator are separated by radial dielectric partitions, electrically connected in series with each other and closed through the electrode unit of the electroflotter. 1 tab. 2 Il.

Description

The invention relates to devices for the purification of liquids by electrochemical methods and can be used to clean process solutions and wastewater in oil producing, oil refining, metal processing, sea, river and road transport and other industrial sectors.

The aim of the invention is to reduce the energy consumption for wastewater treatment. waters

1 shows a device for the electrochemical treatment of wastewater; figure 2 - section aa in figure 1.

A branch pipe 2 for discharging water and a set of insoluble electrodes 3 are located in the electroflotter housing 1. In the lower part of the electroflotter housing 1, there is a chamber 4 of electrocoagulant. Inside the housing 5 there is a coaxially arranged pipe 6 made of a dielectric with strips 7 of porous graphite fixed on it — cathodes. In the pipe 6, over the graphite strips, there are holes for purging the oxygen-containing gas. Opposite the strips 7 of graphite on the case 5 there are fixed strips 8 of aluminum - anode. Partitions 9 are placed between the housing 5 and the tube 6, dividing the chamber 4 into separate volumes, inside each of which one electrode pair anode cathode is placed. The pipe 6 is connected to the system 10 supply of oxygen-containing gas. At the bottom of the camera 4. has a tapered days 4 hours

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Other with a pipe 11 for the supply and uniform distribution of water. The anode-cathode electrode pairs are electrically connected in series with each other and connected to the load by an insoluble electro-flotation electrode.

The device for electrochemical wastewater works as follows.

The purified water is supplied from below to the chamber A of the electrocoagulant and, evenly distributed, flows between the electrodes of the electrode pairs. Here, air is supplied to the perforated pipe 6. When air is passed through a porous graphite cathode 7, coarse dispersed plies are formed. zyrki that float large particles of soil on the surface of the water in the electroflotter. At the same time, an electromotive force arises between the cathode 7 and the anode 8 of the electrocoagulator, and when the electrodes are closed through the load, the anode is electrochemically dissolved to form coagulum-aluminum hydroxide flakes.

Purified water enters the electrofloater, where coagulant flakes are enlarged and they adsorb pollution particles.

The energy produced by the electrode pairs of the electro-coagulant is consumed by the electrolysis of water in the electrofloater, as a result of which finely dispersed gas bubbles are formed, which float fine particles of dirt onto the surface. The purified water is discharged through the nozzle 2. The electroflotter electrodes work efficiently by means of a series connection of electrode, electrocoagulant vapor.

The reduction of energy consumption in the device is achieved due to the fact that the dissolution of electrodes of the electrocoagulator of the torus and the formation of floating gases in the electroflotter are carried out due to the electrical energy produced in the electrocoagulant. Electric energy, supplied from the outside, is spent only on blowing air through the porous cathode.

The table compares the energy consumption for wastewater treatment in the known and proposed devices.

The wastewater treatment device reduces the energy costs by more than two times.

Claims (1)

Invention Formula A device for electrochemical sewage treatment that contains a series-connected electrocoagulator and an electrofloater with electrodes placed in them, and a system for supplying and discharging water, characterized in that, in order to reduce energy consumption, the device fitted with a perforated tube of a dielectric located in an electrocogulator coaxial to its case and connected to an air supply device, the electrocoagulator cathodes are made of porous graphite and fixed on the dielectric tube, the electrodes of the electrocoagulator are made of aluminum and fixed on the body, the electrode pairs electrocoagulators of the torus are separated by radial dielectric partitions, are electrically sequenced soy, repaired with each other and closed through the electrode unit electrofloter. oh 4 6 ten 150 150 150 150 150 400 400 400 400 400 86 80 82 86 SO 90 85 87 90 92 1.0 0.416 0.416 0.416 0.416 OL t with d / f zlentrodam f I ,. lectro (p / iomamopa te. /