中水在造纸过程中的应用特性

分别以中水和清水作为造纸过程抄造用水进行漂白木浆的抄造并模拟白水的封闭循环，分析比较它们对白水水质变化特性以及纸机湿部化学性质的影响．结果发现：模拟白水循环时，总溶解固体、电导率、悬浮固体和硬度等参数，中水组要显著高于清水组；化学耗氧量、浊度、阳离子需求量等参数，中水组比清水组略高；使用中水要比使用清水抄造时浆料的滤水性能和留着性能差．用中水代替清水进行抄造，对纸机湿部化学性质、白水封闭循环程度及纸张物理性能均有一定的影响，需要通过水质分析，并采取相应措施与方法来预防相关问题的发生、

Appliance Performance in Papermaking Industry Using Reclaimed Water as Process Water

In this paper, reclaimed water and fresh water were used as papermaking process water respectively to simulate their differences in the changes of water qualities by different times of white water recirculation, and the influences on wet-end chemistry were compared between them. The results showed that in white water recireulation process, TDS, conductivity, SS and water hardness those for reclaimed water were much higher than those for fresh water, and COD, turbidity, cationic demand those for reclaimed water were a little higher than those for fresh water. Using reclaimed water showed slightly worse performances on retention and drainage than using fresh water. There would be some deterioration in wet-end characteristics, paper physical properties and whitewater closure degree if reclaimed water was used as papermaking process water. So strict water quality examination and controlling strategies would be necessary to prevent the related problems from happening.