SU1546432A1 - Electric flotator - Google Patents

Abstract

The invention relates to devices for the purification of natural and waste waters and can be used in water supply and sewage. The purpose of the invention is to reduce energy consumption for the process. The electrofloat includes a flotation chamber with lamellar and lumpy electrodes, dielectric perforated grids installed perpendicular to lamellar electrodes, nozzles for supplying and discharging liquid and has dielectric perforated partitions that form sections in the flotation chamber, each with elastic straps with lumpy electrodes placed in a lumpy section with lumpy electrodes, which form elastic sections with lumpy electrodes in the flotation chamber, each with elastic chords with lumpy electrodes. perforations of two adjacent partitions along the fluid flow. 1 ill., 1 tab.

Description

The invention relates to devices for the purification of natural and waste waters and can be used in water supply, energy, shipbuilding and other areas of technology.

The purpose of the invention is to reduce energy consumption for the cleaning process.

The drawing shows a longitudinal section of a hydraulic electroflotter.

The electroflotter consists of a housing 1, rectangular in cross section, plate electrodes 2 and 3, arranged parallel to each other, dielectric grids 4 and 5, arranged perpendicular to plate electrodes and forming a flotation chamber. The casing 1 is connected to the nozzle 6 and outlet

7 fluid flow. Between the perforations of the gratings 4 and 5 there are installed dielectric partitions 8 fixed in the grooves of two opposite walls of the housing (not shown). In partitions 8 perforations 9 are made, for example, in the form of round holes. The perforations of two adjacent partitions are made coaxially.

Two adjacent partitions 8 form section A. In sections A, along the flow of fluid between grids 4 and 5, elastic straps 10, for example, rubber, are attached to grids 4 and 5 at their ends. Lump electrodes 11 are fixed on the wiring so that each lump electrode 11 is located between the perforations 9 of two adjacent partitions 8.

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To attach each lump electrode 11 to the harness 10, a through hole 12 is made in the electrode, through which the harness 10 is passed through the loop. The perforation diameter must be not less than the characteristic size of the lump electrode and not more than the amplitude of the forced oscillations of the lump electrode. The first limitation is due to the desire to get gas formation over the entire electrode surface, the second is due to the fact that when the hole diameter is larger than the amplitude of oscillations of the lumpy electrodes, some of the electric current will not pass through the electrode, which means it will not participate in the decomposition of water, which will lead to a decrease in the current efficiency of the gaseous products of water electrolysis.

The device works as follows.

A flow of contaminated fluid is injected through the pipe 6, which through the perforations of the dielectric grids 5 moves through the sections A of the flotation cell. Electrodes 2 and 3 are supplied with a constant or alternating current, and electric power lines are passed through the chamber. The flow of water excites the forced oscillations of the electrodes 11 due to the flexible coupling of the harness 10. In the perforations 9 between two adjacent partitions, the electric current is concentrated and passes through the oscillating electrodes 11, and there is an intense evolution of electrolytic gas bubbles, which are disturbed by the flow of water under the influence of the oscillations of the electrodes 11 . The excreted bubbles adsorb the contaminants on their surface and, together with the flow through the nozzle 7, are diverted to further processing.

Reduction of energy consumption occurs when perforated partitions are placed in the flotation cell parallel to the plate electrodes, between the holes of which bipolar lump electrodes are fixed on elastic cords. These conditions lead to the fact that during the passage of a constant electric current through the flotation cell into the region

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As a result of perforations on partitions and, consequently, on the surface of bipolar electrodes, the current density increases significantly, which allows for an intense gas release from the surface of electrodes placed on elastic bundles, which in turn increases the degree of extraction of contaminants by forming more the amount of flotation complex, or at the same value of the degree of extraction of pollutants to reduce the cost of electricity per unit of the treated liquid.

Each series consisted of ten experiments. The test results are tabulated (in the numerator, the averaged values of the test results for the invention, in the denominator by the known).

As can be seen from the test results, in order to reduce contaminants to the maximum permissible concentrations of the present invention, 15-20% less electricity is required than the known one.

Claims (1)

Invention Formula An electroplator for wastewater treatment, comprising a housing with monopolar electrodes installed in it, between which are placed bipolar spherical electrodes, pipes for supplying and discharging purified water, characterized in that, in order to reduce energy consumption for carrying out the process in the lower and The upper parts of the body are horizontal perforated dielectric gratings, the monopolar electrodes are placed on the side walls of the body perpendicular to the gratings and in the space between them are perforated s dielectric partitions, wherein the perforation is formed of coaxial and spherical bipolar electrodes are fixed on the elastic cord and mounted between the baffles at their perforations, wherein input and output connections are arranged respectively in the lower and upper portions of the housing. Initial concentration one 2.21 13.9 0.01 ots 0.1