How to eliminate bubbles
1. Physical method
Methods to eliminate foam from a physical perspective mainly include placing baffles or filters, mechanical stirring, static electricity, freezing, heating, steam, radiation irradiation, high-speed centrifugation, pressure and decompression, high-frequency vibration, instantaneous discharge and ultrasonic waves (acoustics). Liquid control), etc., these methods all promote the gas permeation rate at both ends of the liquid film and the drainage of the bubble film to varying degrees, so that the stability factor of the foam is smaller than the attenuation factor, so that the number of foams gradually decreases. However, the common shortcomings of these methods are that their use is highly restricted by environmental factors and the defoaming rate is not high. The advantages are environmental protection and high reuse rate.
2. Chemical methods
Methods to eliminate foam from a chemical perspective mainly include chemical reaction methods and methods of adding defoaming agents. The chemical reaction method refers to adding some reagents to cause a chemical reaction with the foaming agent to generate water-insoluble substances, thereby reducing the concentration of surfactants in the liquid film and promoting the rupture of the foam. However, this method involves foaming. The composition of the agent is uncertain and the production of insoluble substances may cause harm to the system equipment. Nowadays, the most widely used defoaming method in all walks of life is the method of adding defoaming agents. The biggest advantages of this method are high foam breaking efficiency and easy use. However, finding a suitable and efficient defoaming agent is the key.
