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纸厂消耗的新鲜水10%～15%是用来稀释浆料和助留剂的,因此利用生产用水代替新鲜水可大大节约新鲜水用量。不同来源和不同质量的水包括新鲜水、从位于纸机系统内部超滤装置排出的水以及纸厂最终废水的薄膜生物反应器的水,用于制备由阳离子聚丙烯酰胺(CPAM)和膨润土组成的双元助留体系。制备用水的质量对膨润土性能影响不明显,当带电基团使得用于制备CPAM的水具有较高的阴离子垃圾和电导率时,会使CPAM的絮凝效率降低12%左右。
10% to 15% of fresh water consumed by the mill is used to dilute the slurry and retention aid, so the use of production water instead of fresh water can greatly save the amount of fresh water. Water from different sources and of different qualities includes fresh water, water from thin-film bioreactors from the water discharged from the ultrafiltration unit located inside the paper machine system and the final waste water of the mill, for the preparation of water consisting of cationic polyacrylamide (CPAM) and bentonite Dual support system. The quality of the make-up water has insignificant effect on the bentonite properties. When charged groups make the water used to make CPAM have high anionic trash and conductivity, the flocculation efficiency of CPAM is reduced by about 12%.