纸机上浆系统和湿部化学控制——岳阳纸业LWC改造项目国际新技术消化吸收

The approach system and wet-end chemistry——Digestion and absorption of new international technologies in the LWC technology innovation project of Yueyang Paper Co.

现代高速纸机要求上浆系统提供混合均匀、不絮聚、低脉冲、清洁不含空气的浆料。由于采用稀释水流浆箱和夹网成形器,成形时脱水迅猛,必须加入助留剂,保持稳定的留着率,才能保证白水浓度和纵向定量的稳定。本文介绍讨论了上浆系统的除渣、除气、筛选等工艺设备上的新技术、新特点;各种助剂加入顺序、加入量的控制,以达到稳定留着率、稳定定量和匀度等质量要求。

Modern high speed paper machines require that the approach system provide uniformly-mixed, non-flocculation,low-pulse,cleanand air-free stock.Because dilution water headbox and twin-wire former are used,drainage is very violent when forming,so the retentionaids must be added to keep retention rate so that the concentration of off-machine water and the longitudinal weight can be keptstabilized.The paper discusses the new technologies and new characteristics of the equipment such as cleanning,deaerating and screeningin the stock system.