The appearance of spray dried polyaluminum chloride is white and light yellow powder. The characteristics of spray drying polyaluminum chloride depend on the operating principle of the pressure spray. The aluminum chloride produced by the pressure spray drying process is porous small particles or hollow small particles, showing dust-proof and smoothness. Because of its better contact with the water to be treated, its wettability and water treatment speed are stronger than other powder products. Spray production not only dries polyaluminum chloride, but also turns it into tiny particles. Polyaluminum chloride is a water-soluble material and shows good thermal stability and solubility.
Spray granulation is to atomize polyaluminum chloride into tiny particles while it is dried. This type of granule has good application performance. Polyaluminum chloride is a water-soluble substance with good thermal stability and high solubility. In the drying process, polyaluminum chloride solution with a solid content of 40% - 50% is introduced into a high-pressure pump, and is atomized by the atomizer in the dryer after being pressurized. It is dispersed into tiny mist droplets. After the mist droplets are dried, granular products are obtained, so that drying and granulation can be completed at the same time.
What are the advantages of spray drying polyaluminum chloride?
1. Spray drying polyaluminum chloride has uniform and stable Al2O3 content, which is easy to be controlled within the index range, enhances the adsorption capacity of colloidal particles, and has two effects of coagulation and flocculation, which can not be achieved by other drying methods.
2. In water treatment, the degree of alkalinity, that is, the degree of polymerization, directly affects the effect of water purification. We use the pressure particle spray drying method to improve the degree of polymerization of the product while maintaining the original activity of the mother liquor. At the same time, we can adjust the degree of alkalinity in time according to different water quality. However, drum drying is very easy to destroy the degree of polymerization, the range of product basicity is small, and the water quality is very narrow.
3. Due to the use of plate and frame pressure filtration technology, the water insoluble matter of solid is below 0.3 and the water insoluble matter of liquid is below 0.1, which can ensure the smooth flow of users' pipes and improve the drug utilization rate, but the natural sedimentation method cannot.
The characteristics of pressure spray drying are mainly determined by the working principle of pressure atomizer, which makes this drying system have its own characteristics. Since the products obtained by pressure spray drying are porous particles or hollow particles, the purpose of pressure spray drying is to obtain granular products, and the obtained granular products have excellent dust-proof performance and fluidity. As there is a large contact area between the product and water, the wettability is better than that of powder products. The speed of purifying water is significantly higher than that of powder products. The products dried by pressure spray have unique characteristics, so they are highly praised by users.
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