Application of Polyaluminum Chloride

Polyaluminum chloride is a new type of inorganic polymer coagulant. It is the most widely used variety with mature industrial production technology. It has become the mainstream product in the polyaluminum flocculant market. The earliest production and application was Japan. In the late 1960s, it was officially put into industrial production and application. Our country has also started production and application in the early 1970s. The application range of basic aluminum chloride is becoming wider and wider, and it can be used for water purification, industrial wastewater, domestic sewage, sludge, etc. It is currently the most widely used coagulant in domestic water supply and industrial water supply treatment. It can also be used in papermaking glue, refractory material binder, textile industry mordant, and in medicine, foundry, machinery, leather, cosmetics, etc. Because basic aluminum chloride has the advantages of less dosage, simple process, convenient operation, high purification efficiency, and wide source of raw materials, it has developed rapidly at home and abroad in the past 20 years.

This product is a cationic inorganic polymer coagulant, which can provide multi-nuclear complex ions when put into water, and will continue to be hydrolyzed and polycondensed until finally producing aluminum hydroxide. Therefore, after the polyaluminum chloride is hydrolyzed, it can provide high-priced polymer ions, the flocs form quickly, the particles are large and heavy, the sedimentation performance is good, and the flocculation effect is better than that of general aluminum salts such as aluminum sulfate. The suitable pH value range is wider than that of traditional aluminum salts (pH value is 5-9), and the pH value and alkalinity of the treated water drop less. When the water temperature is low, it can still maintain a stable flocculation effect, and its alkalization degree is higher than other aluminum salts and iron salts, so the corrosion effect of the liquid medicine on the equipment is small. At the same time, it can also be used to remove iron, manganese, chromium, lead and other heavy metals contained in water, as well as fluoride and oil in water, so it can be used to treat various industrial wastewater. The effective dosage of the product is 20-50 mg/L. Liquid products can be directly metered and added. Solid products need to be made into a 10% to 15% solution in the dissolution tank first, and then metered and added according to the required concentration. The product is highly corrosive, and the feeding equipment needs to be treated with anticorrosion. Need to be equipped with labor protection facilities.