Foams and foams often accompany industrial production. Many operations or processes often generate foams and greatly affect industrial production capacity. For example, the production of foams in the lubricating oil industry will inevitably decrease to produce lubricity, wear and even components Failure; in the transmission series, the foam can reduce the oil pressure, the power drops, and the oil supply is interrupted, and the operation fails; in the gas absorption process, the production of foam will reduce the processing capacity of the absorption device and even cause flooding; In the fermentation process of acid, monosodium glutamate, etc., foaming often severely reduces the utilization rate of the fermenter, even affects the oxygen supply, and reduces the yield of the target product. It can be seen from the above that the elimination of harmful foam has great technical and economic significance, so the application of defoamers plays an indispensable role in industrial production.
Foaming is mostly caused by external forces. The surface-active substances in the solution form foam and float at the junction of the solution and the air, or are caused by the formation of gelatin, protein and other colloidal substances. The defoamer is the In the production process, the surface tension can be reduced and the foam can be eliminated.
There are many types of defoamers, which are mainly divided into five categories: organosiloxane, polyether, silicon and polyether graft, imine and amide, with fast defoaming speed, long foam suppression time, wide range of medium and even harsh The medium environment, such as high temperature, strong alkali and strong acid, is widely used to remove harmful foam produced in the production process of latex, textile sizing, food fermentation, biomedical treatment, coatings, petrochemicals, and paper industry cleaning.
Use defoamer correctly: Choose defoamer with specificity, and understand the environment, temperature, PH value and foaming medium.
Small test first, then pilot test. Stir evenly after stratification. Even if no stratification, stir evenly before use. Do not dilute at will. If you really want to dilute, please use thick aqueous solution under guidance.