Bubbles have a great impact on industrial production. In the production process, foams generated due to various reasons need to be treated with defoamers. There may be some problems with the use of defoamers. We will analyze the use of defoamers in turn to find out the correct method of use.

First, the defoamer is turbid.

The main components of defoamers are generally hydrophobic particles, silicone oil and emulsifiers. Hydrophobic particles absorb silicone oil, so that the silicone can achieve the maximum effect with as little as possible. Silicone oil is used as a foam removal medium with low surface tension, non-lipophilic, non-hydrophilic, and is suspended in the system. When the foam remover exists in the middle of the foam wall, the drained oil and water will produce the foam removal effect. At the same time, when the consumption of silicone oil is low and the silicone oil outside the hydrophobic particles is completely consumed, the foam system will become turbid. Therefore, depending on the amount and color of the hydrophobic particles, silicone oil and emulsifier selected for the defoamer, the performance of the defoamer is also different. The defoaming agent has good defoaming effect, long control time, and the system is not turbid.

Second, restrain the time issue.

The nature of the silicone oil in the foaming agent determines the inhibition time of the foaming agent, and the content of the foaming agent determines the consumption cycle of the foaming agent during use. The foaming elimination performance of the foaming agent of the foaming agent does not meet the requirements , Excessive addition of the foaming remover will affect the performance of the foaming remover, and will also reduce the foaming removal performance of the foaming remover. The particle size of the foaming remover determines the filter resistance of the foaming remover If the particle size of the foaming remover is too large, the foaming remover can be easily filtered. The occurrence of the foaming remover and the mixing time of foaming removal are also important indicators of the foaming removal ability. The foam elimination force is weakened and the foam elimination time is reduced.

Third, the problem of failure.

The stable acid-base silicone oil will destroy the tension of the liquid surface and play a defoaming effect. If the defoaming agent is poor in acid and alkali resistance, the silicone oil will decompose, and the defoaming ability will be reduced and invalid. Adding silicate to the system will inhibit decomposition. Solubility of defoamers; some chemicals dissolve silicone oil in the system, so defoamers no longer have a defoaming effect, but exist in the system as a surfactant, and their foaming rate is higher than that of non-defoamers.

Classification of defoamers.

From the first generation of mineral oil defoamers to the second generation of polyether defoamers, the third generation of silicone defoamers, and polyether modified polysiloxane defoamers, the types and application fields of defoamers are increasing. The more the defoamer, the better the performance of the defoamer.

How to use defoamer?

When buying a defoamer, try to choose a brand-name defoamer manufacturer. There are few problems in the use of defoamer. According to the manufacturer's instructions, add it in a standard proportion to achieve the best defoaming effect.