The purpose of cooling and aging treatment in washing powder processing technology

The original powder of washing powder is called mother powder. The initial state is also small granules, and then it is processed and stirred with various additives to make washing powder. Laundry detergent is an alkaline synthetic detergent, a chemical used to wash clothes. The main components of washing powder are anionic surfactant, sodium alkyl benzene sulfonate, a small amount of non-ionic surfactant, plus some additives, phosphate, silicate, yuanming powder, fluorescent agent, enzyme, etc., after mixing , powder spraying and other processes, and now most of them use 4A fluorspar instead of phosphate. Laundry powder refers to powdery (granular) synthetic detergents. Washing powder processing manufacturers share the purpose of cooling and aging treatment of washing powder processing: usually, the inlet temperature of the hot air in the drying tower is 300 degrees Celsius, and the temperature in the drying tower is about 250 degrees Celsius, and the slurry droplets are dried at this temperature Fine-grained products, too high temperature in the tower will cause the organic components of the powdery product to decompose on the hot wall of the tower and produce insoluble matter. After the slurry mist is dried in the drying tower, the humidity of the fine-grained products coming out of the tower is 60-70°C, and the washing powder coming out of the tower needs to be cooled and aged by air with a lower humidity. The air temperature should be generally controlled at around 30°C. The purpose of cooling and aging treatment is to promote the crystallization of various additives in washing powder, because the water content in washing powder is often related to the solubility and agglomeration performance of the product, and the cooling and aging time is short, so that the water content in washing powder is too small , to accelerate the moisture absorption of the product, and it is easy to agglomerate. This is an important purpose that the post-treatment process needs to achieve.

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