The selection and use of defoamers in papermaking are crucial for the production efficiency and product quality of the papermaking industry. When choosing defoamers, multiple factors need to be considered, including defoaming performance, foam inhibition performance, impact on sizing, usage cost, and environmental requirements.

First of all, according to the specific needs of papermaking process and the characteristics of foam production, select the appropriate type of defoamer. For example, for high-end paper production, fatty alcohol defoamers have become the preferred choice due to their high efficiency and low impact. Kerosene defoamers may be more suitable for situations where foam on water surface needs to be eliminated.

Secondly, consider the impact of defoamers on sizing. Some defoamers may affect the sizing effect, causing odors on the finished paper or affecting the quality of the paper. Therefore, when choosing defoamers, priority should be given to products that have less impact on sizing.

In addition, the cost of use is also an important factor to consider when choosing defoamers. The prices of different types of defoamers vary greatly, and suitable products should be selected based on actual needs and budget. At the same time, consider the dosage and addition method of defoamers to ensure cost-effectiveness and effectiveness.

When using defoamers, they should be added according to specific process conditions and defoaming requirements. Usually, it can be directly added to the system that needs to be defoamed through a drip pump, or it can be used after dilution. The dosage shall be adjusted according to the severity of foam and the performance of defoamer.

In the process of use, the following points should also be noted: First, fully mix the lotion to ensure the uniform distribution of defoamer; Secondly, avoid excessive dilution to avoid affecting the defoaming effect; Third, pay attention to the stability of lotion to avoid damage to lotion caused by frost and high temperature environment.