RU1796299C - Method for washing vessels - Google Patents

Abstract

Scope: for washing containers with complex internal configuration from residues of insoluble and water-insoluble organic substances. SUMMARY OF THE INVENTION: gas during the washing process is supplied to the lower part of the tank both during washing and during the discharge, with kinetic energy corresponding to the separation of contaminants and keeping them in suspension. 1 s.p. f-ly, 1 ill.

Description

The invention relates to washing technology, in particular ™, of containers with a complex internal configuration (set) from residues of insoluble and sparingly soluble in organic substances.

A known method of cleaning (washing) containers is that after filling the container with a solution of a washing liquid, alternating periodically supplying a vapor-air mixture. Reciprocal movements of this liquid are created which intensify the washing of these deposits. At the same time, circulating washing liquid is carried out at low flow rates, during which part of the contaminated washing liquid from the tank is continuously diverted to sedimentation and filtration, and the same part of the purified one is added.

The aim of the invention is to improve the quality and productivity of the washing process.

The goal is achieved by the fact that the gas during the washing process is fed into the lower part of the tank in the direction from the bottom up with kinetic energy sufficient to detach particles of contaminants from the surface being cleaned by gas bubbles, and during the discharge of the washing solution, gas is also supplied in the same direction and with kinetic energy sufficient to keep the contaminant particles in suspension.

In addition, gas is supplied through pneumatic aerators.

The drawing shows a diagram of the implementation of the method.

A system of pneumatic aerators 1. mounted on the bottom of the tank 2, through a flow limiter 3 connected to a gas source 4. As a gas source, a compressor or an inert gas generator or a cylinder with compressed az can be used. For pumping waste

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a drain valve 5 is used for liquid; a valve 6 is used for venting gas.

Before washing, the remaining product is pumped out of the tank and the tank is filled with an effective surfactant solution, after which gas is supplied to the lower part of the tank through pneumatic aerators. This not only organizes the reciprocating movement of the solution, but also leads to direct contact of small air bubbles with the Mie pollution located on the walls and on the bottom. With a decrease in the surface tension holding the pollution on the wall and bottom (which is achieved by the presence of an effective surfactant), the air bubble is able to tear off the pollution particle from the surface of the container and transfer it to the next liquid layer.

At the end of the washing, the liquid is pumped out through the drain valve located below. At the same time, the gas supply continues, i.e. do not allow settling of washed residues on the bottom. If possible 0

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If you can remove the upper part of the solution with washed dirt through a valve located in the upper or middle part of the tank, you must use this. If the container is closed, a hole or valve should be provided to vent excess gas.

During the entire period of operation of the tank, gas is periodically supplied to raise the settling but not cemented solid particles. This operation is particularly effective while pumping part of the contents of the container to another container for transportation or for corresponding consumption. Such preventive gas supply protects the tank from the accumulation of asphalt-tar deposits, which greatly simplifies washing. This eliminates the need for manual washing, maintains a uniform concentration of surfactants in the washing liquid and reduces the emulsification of the wash water, i.e., easily separated waste solutions are formed.

Claims (2)

Formula 1, A method of washing containers, the method is that the container is filled with a washing solution into which gas is supplied during the washing process, after which the spent solution is drained, characterized in that, in order to improve the quality and productivity of the washing, the gas during washing served in the lower part of the tank in the direction from the bottom up, with kinetic energy sufficient to detach the particles of contaminants from the surface being cleaned by gas bubbles, and during the discharge of the washing solution, gas is also supplied in the same direction and with kinetic energy sufficient to keep the contaminant particles in suspension. 2. A method according to claim 1, characterized in that the gas is supplied by means of pneumatic aerators.