The cause of the dissolution of Cationic Polyacrylamide and its solution
Many sewage treatment plant bottles inside the wall, the bottom of the tank is a thin layer of similar colloidal residue and some large floc, these residues stirring, stirring for how long time it is difficult to dissolve it, if not properly handled, often cause some unnecessary small trouble, and these residues in the clean-up also want to be the trouble, some larger flocculation group can also use hooks, such as to remove it, the most afraid is that some small floc into the drug pipeline plugging dosing pump.
Cationic Polyacrylamide is an organic polymer flocculant, the molecular weight is relatively large, generally in million, tens, dissolved when the first swelling, and then slowly dissolved, if the use of artificial dosing method, one-time into the water to add a large amount of Cationic Polyacrylamide, and can not even slowly add, Cationic Polyacrylamide first contact with the water part, began to swelling, and then the surface area became larger, and then wrapped the part of the water that is not exposed (you can peel out the floc to see, the middle is dry, not stained with water), So it forms some insoluble Cationic Polyacrylamide clusters. At present, most sewage treatment plants generally use artificial dosing (if the use of automatic feeding machine to add medicine, not only save manpower, and can be the greatest effort to avoid this situation). It is suggested that the water should be stirred up first, then slowly and evenly in the water column above the water inlet, so that the medicament can be washed into the waters, so as to reduce the probability of the knot, and avoid the contact between the medicament and the inner wall of the dissolving tank as far as possible.
Recommendations: Conditions permitting the use of automatic continuous feeding system as far as possible, improve the efficiency of the same time can also be very good to avoid the drug when the knot of the situation. In addition, at present, the quality of Cationic Polyacrylamide in the market is uneven, some products themselves have quality defects, product hydrophilic is not good, insoluble, poor solubility, in addition to the drug is easy to knot.