Our lives are increasingly inseparable from chemical products, from clothing, food, housing, transportation, and other aspects such as clothing, building materials, furniture, rice cultivation, wheat, etc. The same applies in industrial production. Generally, some foam are often encountered in industrial production. This is also a difficult point to solve.
Foam is often accompanied by industrial production. Many operations or technological processes often produce foam, which greatly affects the industrial production capacity. For example, foam produced in the industrial production of lubricating oil is bound to reduce the lubricity, wear and even failure of components; In the transmission series, the foam can reduce the oil pressure and power so that the oil supply is interrupted and the operation fails; In the process of gas absorption, the production of foam will reduce the processing capacity of the absorption device and even cause flooding; In the fermentation process of producing antibiotics, glutamic acid, monosodium glutamate, etc., foaming often seriously reduces the utilization rate of the fermentation tank, and even affects oxygen supply, resulting in a decrease in the yield of the target product. It can be seen from the above that eliminating harmful foam is of great technical and economic significance, so the application of defoamer plays an indispensable role in industrial production.
The production of foam is mostly due to the external force, the surfactant contained in the solution forms foam at the junction of the solution and air and floats up, or colloidal substances such as gelatin and protein form films and bubbles. Defoamers are substances that can reduce the surface tension and eliminate foam in the production process.
There are many kinds of defoamers, which are mainly divided into five categories: organosiloxane, polyether, silicon and polyether grafting, imine and amide. They have the characteristics of fast defoaming speed, long foam suppression time, a wide range of use media, and even harsh media environment, such as high temperature, strong base and strong acid. They are widely used to remove harmful foam generated in the production process of latex, textile sizing, food fermentation, biomedicine, coating, petrochemical, paper industry cleaning, etc.
Proper use of defoamers: The selection of defoamers should be targeted, with an understanding of the usage environment, temperature, pH value, and foaming medium. First conduct small-scale trials, then conduct pilot trials to determine the optimal product and dosage for use. After layering occurs, stir well first. Even if there is no layering, stir well before use. Do not dilute randomly. If dilution is necessary, use a thick water solution under guidance.
