SU482202A1 - Device for electroflotation cleaning of circulating fluid - Google Patents

Description

one

The invention relates to the purification of a liquid from fine particles dispersed in it by the flotation method and can be used in metalworking without chip removal for cleaning a working fluid, for example, an electrolyte, during electrochemical treatment from suspended fine particles of sludge.

Electrofloating purification devices are known to be circulating, it is liquid, which is a tank divided by a partition into an intake compartment with a pump and a worker with an electrolyzer, each of the compartments being a flotation chamber.

The drawback of the device, along with the cumbersome and complex installation and replacement of the electrodes, is that the foam product (sludge) accumulated in the upper part of each compartment, when it is removed, mixes with pure liquid and enters the intake part of the device. In addition, the direction of the emergence of gas bubbles in some compartments is opposite to the direction of movement of the liquid. All this reduces the quality of cleaning contaminated fluid.

The aim of the invention is to improve the quality of cleaning.

This is achieved by the fact that the electrolyzer is designed as a diffuser and is mounted on a horizontal partition.

which forms the intermediate compartment with the container capacity and on which the valve is installed with an additional electrolyzer at the inlet.

The drawing shows the proposed device for electroflotation cleaning of liquid liquid, the general view.

The device consists of an electrolytic compartment 1, intake compartment 2, interconnected by means of an intermediate compartment

3. In the electrolysis cell 1, there is an electrolysis cell comprising a plate-shaped anode 4 and a grid-cathode 5 located along the edges of the diffuser 6 made of an insulating material.

Anode 4 has a large working area to reduce the anode current density. The electrolysis compartment 1 and the intermediate compartment 3 are separated by a partition 7 made of insulating material,

on which valve 8 is installed. Via valve 8, communication between the electrolyzer and intake compartments of the device is carried out. The inlet part of the valve is designed as an additional electrolyzer with an anode.

9 and the grid cathode 10. As one of the options, the functions of the automatic valve reliably are performed by the ball 11 with a specific weight less than the specific weight of the liquid being cleaned. The walls of the electrolytic compartment are insulated with overlays 12. Soiled liquid

The bone (electrolyte) is supplied to the device through a pipe 13 connected to the negative pole of the power source. In the intake compartment installed pump 14.

The device works as follows.

When a polluted fluid enters the pipe 13 when the operating cycle is switched on, it passes into the diffuser 6, where the flow velocity slows down dramatically. At the same time, a constant voltage is applied to the electrodes 4, 5, 9 and 10. On the cathodes of the grid, water begins to form, saturating the polluted liquid in the diffuser 6 and near the inlet part of the valve 8. Suspended fine particles in the liquids, under the action of gas bubbles, rise to the upper part of the electrolysis cell 1 and accumulate there as a frothy product. Up to a certain level difference in compartments 1 and 2, a stable cleaning process is established in a stationary liquid, after which, under the action of the pressure difference in compartments 1 and 2, a valve opens and a continuous circulation of the cleaned fluid begins. The closed circulation of a liquid, for example, electrolyte during electrochemical processing, ensures equal flow rates, and when a certain level difference is reached in compartments 1 and 2, the valve is constantly open.

The removal of the frothy product (sludge) located in the upper part of the electrolytic compartment 1 is carried out periodically with a non-moving fluid and a closed valve.

Subject invention

A device for electroflotation cleaning of the circulating fluid, including a container divided by a partition into an intake compartment with a pump and a worker with an electrolyzer, characterized in that, in order to improve the quality of cleaning, the electrolyzer is designed as a diffuser and mounted on a horizontal partition that forms with the bottom tanks intermediate compartment and on which the valve is installed with an additional electrolyzer at the inlet.