In terms of chemical properties, polyacrylamide not only has strong thickening properties, but also has resistance reduction, adhesion and flocculation properties. In terms of physical properties, it is easy to dissolve in water.
Dissolved concentration of polyacrylamide: The dissolved concentration of cation is usually 0.2 percent, while the dissolved concentration of anionic and non-ionic products is one percent. When in use, a stirring tank and a metering pump with a stirring device should be provided on site. The stirring tank cannot be made of iron materials, because the reaction performance of PAM with iron is reduced. When dissolving the medicine, use clean tap water, and it is strictly forbidden to use sewage, acidic or alkaline water. Dissolving, the temperature during dissolving is 10-40°C. After dissolving, it should be used up within 24 hours. This product is non-toxic, pay attention to moisture-proof, rain-proof, and avoid sunlight exposure. The storage period is 2 years.
Anionic polyacrylamide can be effectively used for the sedimentation and separation of mineral suspensions, and has a good sedimentation and separation effect on suspensions with a neutral to alkaline pH containing a lot of inorganic substances. It can be used in iron-making blast furnaces and aluminum processing in water treatment. , papermaking, river sand washing, domestic water and treatment, power plant water, tailings sewage, etc., and others are basically the same as cations.
Zwitterions have the neutralization properties of cationic and anionic polyacrylamide. In water treatment, amphoteric PAM has the characteristics of less dosage, fast flocculation, less influence by common salts and temperature, easy handling and wide application range of PH. In sewage treatment, the properties of water quality are relatively complex or the properties of water often change, and the effect of using amphoteric PAM as a flocculant will be better.
Non-ionic polyacrylamide has high purity and good solubility. It has the functions of flocculation, dispersion, thickening, bonding, gel formation and colloid stabilization. In sewage treatment, the use method is basically the same as that of anions and cations, but the stirring speed should be controlled at 100-300r/min, and the stirring time should be more than 90 minutes, so that the chemicals can fully play their role.