When using polyacrylamide, polyacrylamide particles should be fully dissolved before use. However, it is often seen that there is always a thin layer of gel-like residue on the inner wall of the dispensing tank, and this layer of gel-like residue is very sticky and slippery. If not cleaned in time, it will easily block the injection pump, so it needs to be cleaned every time. This is very troublesome, so what cause this phenomenon, polyacrylamide manufacturers teach you to avoid residue effective methods.
Generally speaking, this phenomenon is caused by the addition of too much flocculant. In general, do not overadd polyacrylamide flocculant. Polyacrylamide manufacturers found that the polymer flocculant in aqueous solution if the concentration of more than 5%, is very easy to form a gelatinous material. Under normal circumstances, flocculants will be used to flocculate and enter the flocculation group. However, if the concentration of polymer materials is too high, the molecules are prone to settlement and adhesion. If part or all of the polymer material does not function, automatic condensation. If added in excess, the excess polymer material will slowly coagulate.
Polyacrylamide is widely used in papermaking industry, which can be used as dispersant, retention and filtration aid for papermaking, and sewage treatment agent for papermaking. Polyacrylamide with different technical indexes should be selected in different application steps.
Polyacrylamide as paper dispersant, the general use of molecular weight of 14 -18 million anionic polyacrylamide; Cationic polyacrylamide needs to be used in the process of retention and filtration assistance. It is suggested that manufacturers use high-quality cationic polyacrylamide, so that the effect of filtration assistance is better, and at the same time, the dosage is less; In the process of papermaking sewage treatment, the selection of polyacrylamide should be based on the situation of sewage, on-site sewage treatment process, sludge dewatering equipment to choose, generally choose the molecular weight of cationic polyacrylamide over 9 million as sludge dehydrating agent.
