How many kinds of defoaming methods do you know?

Physical defoaming

Spraying water, high-speed spraying water or water droplets can break up the bubbles floating on the water surface, which can reduce the foam. Although it can not be defoamed at all, it is a simple and common physical method. Although the foam is reduced, once it stops, The foam is also produced in large quantities, resulting in a series of increasing costs (this method is only suitable for partial liquid phase systems, such as sewage treatment).

The use of heating and cooling to break the foam increases the temperature to lower the viscosity of the liquid, and enhances the evaporation of the solvent, causing the foam to rupture. At low temperatures, the surface elasticity of the foam is lowered, and the foam becomes unstable due to icing, thereby achieving the purpose of defoaming. Disadvantages: Heating or cooling may cause damage to the system itself.

Pressurization or decompression (pressure-reduction; depressurization-normal pressure; normal pressure-pressure) Repeated operation is a method of destroying the membrane (high-viscosity substances are suitable for decompression).

Natural defoaming method. The liquid using the liquid film between the foams oozes along the Plateau interface, the gas diffusion between the bubbles and the rupture of some individual bubble films. The characteristics are: large area and long defoaming time. (Not suitable for drilling fluid defoaming)

Physical defoamer. The application area is small, the defoaming effect remains to be observed, the product maturity is insufficient, the equipment cost is high, and the maintenance cost is high.

Chemical defoaming

The addition of an antifoaming agent is a commonly used method. In addition, it is also possible to achieve certain purposes by changing certain properties of the blowing agent, adding a chemical reagent that reacts with the foam, adjusting the pH, and the like.

Preferably, a combination of an antifoaming agent or an antifoaming agent and physical defoaming is used. Due to the appearance of defoamers with excellent properties such as silicones and silicone copolymers, defoamers have attracted more and more attention, and their use has been increasing and the dosage has been increasing.

Amber Zhang Ms.

Foreign trade 

Zhejiang Ruico Advanced Materials Co., Ltd. (Stock No.873233)

Add: No.188, Liangshan Road, Linghu Town, Nanxun District, Huzhou City, Zhejiang Province, China 313018

Phone: +86 (572) 2903236

Fax: +86 (572) 2905222

Wechat: 15534631339

Website: www.ruicoglobal.com 

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