Baoding Santuo Chemical briefly analyzes how to choose defoamer?

Baoding Santuo Chemical IndustryIntroduction Defoaming agent is insoluble or difficult to dissolve in the foaming liquid. In order to eliminate foam, the defoaming agent should be concentrated on the bubble film. The surface tension should be lower than that of the foaming liquid so that the defoaming agent particles can immerse and expand on the bubble film. It has a certain degree of affinity with the foaming liquid. If it is too close, it will dissolve, and if it is too loose, it will be difficult to disperse. It is best to strike a balance between the two. There is no chemical reaction with foam liquid to avoid the generation of dangerous substances.

The defoaming effect is fast and the foam suppression time is long. The length of the foam suppression time is an important indicator that determines the quality of the defoamer. In most cases, defoaming agents are used for their foam suppression properties rather than their initial defoaming properties. Determine the defoaming agent system and choose an industry-specific defoaming agent system. For example, in the fermentation industry, you must choose oil-based defoaming agents, and in the water treatment industry, choose water-based defoaming agents or silicone defoaming agents.

In the process of metal cleaning, the cleaning agent itself has strong decomposition and dissolution capabilities for dirt, but the large amount of foam produced will corrode the metal to a certain extent, so corresponding suppression measures are required.The large amount of foam produced during the cleaning process is not conducive to observing the degree of cleaning, which virtually increases the cost of cleaning and causes a waste of resources.The discharge of a large amount of foam during cleaning will bring a certain degree of pressure to organisms and the environment, and can easily cause environmental pollution.

During the cleaning process, a large amount of foam can easily cause a certain degree of damage to mechanical equipment and reduce the life of the equipment.Foam will leave insoluble matter on the surface of the cleaning object and form a new covering layer, causing improper cleaning, which is not conducive to subsequent processes and affects the quality of the product.