Abstract: Wood cellulose is widely used as a filter aid. Different filtration conditions greatly affect the filtration performance of the wood cellulose filter cake layer. In this paper，the influence of filtration pressure on retention efficiency and average filtration rate was studied with the single-factor method. The influence of viscosity of suspension，concentration of wood cellulose，amount of wood cellulose and water content on retention efficiency and average filtration rate was studied with orthogonal experiment. Experimental results showed that wood cellulose filter aid was a moderately compressible material and its filtration performance changed with filtration condition. The best filtration condition was determined by analyzing experimental results. The results provide a reference for small-scale industrial trials of filtration with wood cellulose.

Key words: wood cellulose, filter aid, filtration, retention efficiency, average filtration rate

摘要： 木浆纤维素作为助滤剂应用广泛，其过滤性能亟待研究。不同的过滤条件对木浆纤维素滤饼层的过滤性能会有很大影响。本文通过单因素法考察了过滤压力对滤饼层截留精度和平均滤速的影响，并通过正交实验法考察了木浆悬浮液黏度、木浆浓度、木浆添加量、悬浮液含水对滤饼层截留精度和平均滤速的影响。实验表明木浆纤维素属于中等可压缩性物料，其过滤性能随过滤条件变化呈规律性变化。通过对实验结果的分析，确定了优化方案。研究结果为木浆纤维素过滤的小型工业试验提供参考。

关键词: 木浆纤维素, 助滤剂, 过滤, 截留精度, 平均滤速