Due to the good stability of spray drying, the PAC has the advantages of wide adaptability to water, fast hydrolysis speed and strong adsorption capacity, and has the advantages of large alum, dense and precipitated precipitates, low turbidity and good dewatering performance. Under the same water quality, the dosage of spray drying polyaluminum chloride(PAC) is reduced, especially under the condition of poor water quality. The volume of spray drying products can be reduced by half compared with that of the drum drying polyaluminum chloride, which not only reduces the labor intensity of workers, but also more importantly, reduces the user’s water production cost. In addition, spray drying products can ensure safety and reduce water accidents, which is very safe and reliable for drinking water.
The color is yellow or light yellow, dark brown and dark gray resin solid. The product has strong bridging adsorption performance. In the hydrolysis process, physical and chemical processes such as condensation, adsorption and precipitation occur. The fundamental difference between polyaluminium chloride and traditional inorganic coagulant is that the traditional inorganic coagulant is a low molecular crystalline salt, while the structure of polyaluminium chloride is composed of polybasic carboxyl complex with changeable morphology, with fast flocculation and sedimentation speed, wide applicable pH value range, no corrosion to pipeline equipment, obvious water purification effect, and can effectively support the color SS, COD, BOD, arsenic, mercury and other heavy metal ions in the water, The product is widely used in the fields of drinking water, industrial water and sewage treatment.