PARTICLE SUSPENSIONS OF FLOCCULATING POLYMER POWDERS AND POWDER FLOCCULANT POLYMER BLENDS

摘要

Powder blends are described comprising blends of particulate water soluble high molecular weight polymer flocculants. The polymer flocculants can include polyethylene oxide, polyDadmac, Dadmac-acrylamide copolymers, copolymers thereof and combinations thereof. The powder blends allows the use of fine powders while reducing potential air quality and safety issues. The powder blends can be used for waste water purification, fiber dewatering, and the like. The powder blends can be diluted by a water dilution flow prior to entering a waste water stream.

主权项

1. A method for treating a liquid, the method comprising:
delivering a powder blend of flocculating polymers from a reservoir into an aqueous treatment stream at a selected concentration, the delivering process comprising direct delivery of powder blend into the aqueous treatment stream and/or delivering the powder blend into a dilution water flow to form an initial aqueous combination that is flowed into the waste stream within 5 minutes of forming the combination, wherein the powder blend comprises a particulate water soluble flocculant polymer different from polyDadmac having a molecular weight of more than 100,000 g/mol and polyDadmac, wherein the powder blend has a concentration of flocculant polymer from about 1 weight percent to about 60 weight percent, and wherein the flocculant polymer has a particulate size providing for dissolving into water at low concentration in no more than about 5 minutes.