Polyacrylamide is widely used in sewage treatment field（污水处理领域大量使用聚丙烯酰胺）.doc

Polyacrylamide is widely used in sewage treatment field（污水处理领域大量使用聚丙烯酰胺） The appearance of polyacrylamide: solid polyacrylamide is white or yellowish powder, the molecular weight of 400 - 20 million, the appearance of a solid product is white or slightly yellow powder, liquid is colorless viscous colloid, soluble in water, easy to decompose at the temperature above 120 DEG C; colloidal polyacrylamide is a colorless or slightly yellow transparent colloid. Polyacrylamide dissolution uneven or inadequate will affect the use effect. The powdered polyacrylamide can be stored in a dry, cool place for more than two years, but the storage time is limited after the solution has been prepared. In general, when the solution concentration is 0.1%, the non anionic polymer solution is not more than one week; the cationic polymer solution is not more than one day. The stability of the solution is related to the concentration, and the longer the concentration of the solution (such as 3% to 5%), the longer the storage time of the solution. But 3% to 5% of the solution can not directly deal with sewage, before use, but also diluted, cationic polyacrylamide solution pH value of less than 5.5 is more stable, greater than 6 will be quickly broken due to hydrolysis. It is sensitive to iron ion, calcium ion and magnesium ion than anionic polymerization. Iron is caused by chemical degradation of polyacrylamide catalyst, all so in preparation, transfer and storage of polyacrylamide solution, to avoid iron into contact with the solution with the best equipment, stainless steel, plastic, glass or steel surface coating resin made of carbon steel. Polyacrylamide as a kind of organic polymer flocculants in wastewater treatment field is widely used in the previous article has talked about the importance of Polyacrylamide in the practical application of the selection, at noon received a newly dealers call, it is about the selection of the problem, not done with any experiment, as elsewhere bought