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首页> 外文期刊>Wochenblatt fur papierfabrikation >Polyacrylamides (PAM) for Process Water Treatment in the Production of Mechanical Printing Papers
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Polyacrylamides (PAM) for Process Water Treatment in the Production of Mechanical Printing Papers

机译：聚丙烯酰胺 （PAM） 在机械印刷纸生产中的工艺水处理

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摘要

Measures for fiber recovery and lowest load of circulating water and clear filtrates have major impact on productivity and paper quality.Well known technologies (Dissolved Air Flotation,Disk Screens) are supported by tailor-made chemical additives.At this flocculants are used on the basis of polyacrylamides (PAM) possibly in combination with coagulants such as polyamines or poly-DADMAC.Chemistry and market situation of this flocculants will be introduced in this paper.Process Water Treatment will be discussed considering the production of mechanical printing papers as example.After an explanation of the water circuitry feeding points and dosages will be described.Finely it will be shown,that more then 99 of the flocculants are carried out with the rejects.Ca.0,5 only will be discharged to the biological treatment plant (which belongs to the municipality in this case).In this plant significant higher amounts of similar polyacrylamides are added for sludge dewatering according best technical practice.
机译：纤维回收、最低循环水负荷和清滤液的措施对生产率和纸张质量有重大影响。众所周知的技术（溶气浮选、圆盘筛）由量身定制的化学添加剂提供支持。本文将介绍这种絮凝剂的化学性质和市场情况，以聚丙烯酰胺（PAM）为基础，可能与聚胺或聚DADMAC等混凝剂结合使用。以机械打印纸的生产为例，将讨论工艺水处理。在对水回路进行解释后，将描述进料点和剂量。可以看出，超过99%的絮凝剂是用废品进行的。只有 Ca.0,5% 将排放到生物处理厂（在这种情况下属于市政当局）。在该工厂中，根据最佳技术实践，添加了大量类似的聚丙烯酰胺用于污泥脱水。

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