SU1095934A1 - Method of suppressing froth - Google Patents

Abstract

A method of damping a foam by exposing red radiation, characterized in that, in order to increase the efficiency of foam quenching, it is exposed to infrared radiation with a wavelength corresponding to the absorption spectrum of the films, the liquid contained in the foam.

Description

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The invention relates to methods for the separation of two-phase gas-liquid systems with a foam structure and can be used in the microbiological industry in synthetic processes for microorganisms.

There is a known method of quenching a foam, in which the foam is treated with superheated steam with a temperature exceeding the temperature of the foaming liquid Cl i

The disadvantages of the method are the impossibility of using it in the conditions of microbiological synthesis due to the death of microorganisms and large heat losses.

Closest to the proposed technical essence and the achieved result is a method of extinguishing the foam by exposure to infrared radiation. A known method is to install a series of infrared radiation sources with a reflective screen above the surface of the foam liquid. The heat flux received from the radiators causes the foam to heat up and thermally destroy it. 23 The disadvantages of this method are high temperature effects on the foam surfaces, which result in local overheating, which makes it impossible to use this method in the synthesis of microorganisms, as well as large heat losses.

The purpose of the invention is to increase the efficiency of the foam quenching. The goal is achieved by the fact that in the method of extinguishing the foam by the action of infrared radiation,

they are exposed to infrared radiation with a wavelength corresponding to the absorption spectrum of the liquid films contained in the foam.

The effect occurs when coherent laser radiation is used, the wavelength of which coincides with the half absorption of liquid film substances. The absorption bands of solutions constituting the culture fluid are in the range of 5-12 microns.

Efficiency arises as a result of foam destruction due to selective absorption of laser beam energy by films of a two-phase system. Absorption of a laser pulse causes instantaneous evaporation of the fraction of liquid contained in the film. Since evaporation is short-lived at the molecular level, it does not heat the components as a whole. The impulse effect of radiation ensures the destruction of large volumes and leads to a decrease in energy loss.

An example. The processing of foams of different nature is carried out: a one-percent foam solution of the PO-HA type foam, a one-percent foam solution of the SAMPO type foam and Zhigulyovsk beer beer foam by the proposed method and methods using radiation with a wavelength different from the absorption spectrum of liquid-film films contained in foam (5 um).

The results obtained are presented in the table.

310959344

The data obtained show that the change in ambient temperature and conditions

Only the use of radiation is the cultivation of microorganisms, the wavelength corresponding to the spectrum. The proposed method provides

The absorption of liquid films, which is also highly reliable and stable in foam, allows destructiveness of work, allows you to automatically control and control the process with the same consumption of energy:

Hygiene 10 times the volume of foam carried on any operating modes.

Claims (1)

METHOD FOR EXTINGUISHING FOAM by exposure to infrared radiation, characterized in that, in order to increase the efficiency of extinguishing foam, they are exposed to infrared radiation with a wavelength corresponding to the absorption spectrum of the films of the liquid contained in the foam. about © 4 ^