废纸回用过程中硅藻土对白水中DCS的影响研究

利用硅藻土作树脂吸附剂加填到废纸回用体系中,探讨了硅藻土的加入对白水中胶体和溶解物质(DCS)累积、浆料滤水以及成纸性能的影响,分析硅藻土对树脂障碍的缓解改善情况。研究表明废纸回用体系中硅藻土的加入可以缓解白水中DCS的积累和胶黏物问题,有利于白水循环程度的提高。研究表明浆料滤水时间减少25.8%,助留助滤效果明显。成纸灰分和白度分别提高9.13%和5.30%,裂断长和施胶度分别降低14.43%和18%,物理强度和施胶度均可满足用户要求。

Effect of Diatomite on DCS in White Water during the Process of Waste Paper Recycling

With the increasing of waste paper recycling degree in papermaking industry,more attention was paid on how to solve resin trouble and stickies trouble effectively in the process of second fiber utilization industry.Diatomite was selected to be used as resin adsorbent in waste paper system.The effect of diato-mite on dissolved and colloidal substances(DCS) accumulation in white-water,pulp drainage and paper performance was investigated.The improvement of diatomite on resin trouble was analyzed as well.Results showed that the addition of diatomite as resin adsorbent can relieve DCS accumulation and resin trouble effectively in waste paper recycling process.Under the help of diatomite,the drainage time was reduced about 25.8 % and the effect of retention and drainage was improved greatly.As for the paper sheet property,the ash and brightness were increased 9.13 % and 5.30 % respectively.The break length and sizing degree were reduced 14.43 % and 18 % respectively,but it can still meet the requirement of customers.