The selection and use of defoamers in papermaking are directly related to the production efficiency and product quality of papermaking. The correct selection and use of defoamer can not only effectively solve the foam problem, but also reduce production costs and improve overall efficiency. This article will provide practical guidance for paper companies on the selection principles, usage methods, and precautions of defoamers.

1、 The principle of selecting defoamers is to choose the appropriate defoamer based on the papermaking process and pulp characteristics. High efficiency and long-lasting organic silicon defoamers should be selected for high-speed paper machines; The process of removing ink from waste paper requires consideration of the dispersibility and stability of defoamers. Prioritize the use of low toxicity and biodegradable defoamers to reduce their impact on the environment. On the premise of ensuring the defoaming effect, consider the cost-effectiveness of defoamers and choose products with high cost-effectiveness.

2、 Usage: According to the type of defoamer and the requirements of the papermaking process, dilute the defoamer to an appropriate concentration and evenly add it to the pulp through a dedicated dosing device. Select the right time to put, such as at the initial stage of slurry mixing or before the peak of foam production, to achieve the best defoaming effect. Determine the optimal dosage through experimentation to avoid excessive use causing waste or affecting paper quality.

3、 Attention: Regularly check the effectiveness of defoamers, adjust the dosage and delivery method in a timely manner. Pay attention to the storage conditions of defoamers and avoid high temperature and humid environments that may cause a decrease in their performance. Follow safety production regulations to prevent defoamers from causing harm to human health and the environment.

The selection and use of defoamers in papermaking is a science that requires comprehensive consideration of process requirements, environmental regulations, cost-effectiveness, and other factors. Scientific and reasonable selection and use can effectively solve the foam problem in the papermaking process, improve production efficiency and product quality, and contribute to the sustainable development of papermaking enterprises.