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摘要：针对悬浮液体系中纳米级凹凸棒石回收困难问题，本文采用无机陶瓷膜微滤分离纳米凹凸棒石悬浮液，考察陶瓷膜孔径、操作条件(如温度、压力)和料液性质对微滤过程的影响。实验结果表明，膜孔径不同，膜微滤所得渗透通量不同，对凹凸棒石的截留效果也不相同，采用孔径为500nm的陶瓷膜分离效果较好，稳定渗透通量较大，生产能力较高；膜面流速越大，膜稳定渗透通量越高；料液浓度越大，膜渗透通量越小；操作压力0.1Mpa、料液温度25℃、料液pH值9.81时，膜渗透通量最大。过滤两个小时以后，渗透液和截留液浊度分别是0.148NTU和3507NTU，表明氧化锆微滤膜能够有效截留水体中的凹凸棒石颗粒。53390
毕业论文关键词：凹凸棒石，膜分离，微滤
Abstract：Membrane separation technology is an emerging one which has superiority in energy saving, high efficiency and simple equipment in contrast with the traditional separation technologies. The microfiltration separation process of attapulgite clay suspension was studied with inorganic ceramic membrane. The effect on the permeate flux of various operating parameters, including pore size of membranes, operating conditions such as transmembrane pressure and temperature and the solution properties were studied respectively. The results showed that permeate flux and retention effects were different for different pore size of membranes. The best pore size of membranes was 500nm. The increasing of surface velocity of membranes was beneficial to the improvement of the membrane permeate flux. The smaller the slurry concentration, the greater the permeate flux. The largest membrane permeate flux could be obtained when operating conditions such as operating pressure 0.1 Mpa, feed liquid temperature 25℃, pH value of 9.81 and so on were ideal. Filtering two hours later, the turbidity of penetrating fluid and residual liquid are 0.148 NTU and 3507 NTU respectively, suggesting that membrane separation can effectively realize the separation of attapulgite patticles and water.
Keywords：attapulgite clay, membrane separation, microfiltration
目 录
1 绪论 4
1.1 凹凸棒石 4
1.1.1 凹凸棒石的性质 4
1.1.2 凹凸棒石的应用研究进展 4
1.2 膜分离 5
1.2.1 膜分离简介 5
1.2.2 膜分离法的优点 6
1.2.3 膜分离法在水处理中的应用 6
1.2.4 膜污染及清洗 6
1.3 本文的研究思路及内容 7
2 实验部分 8
2.1 实验仪器和试剂 8
2.2 膜分离实验工艺流程 8
2.3 实验测试和分析方法 9
2.3.1 膜渗透通量的测定 9
2.3.2 浊度的测定 9
2.4 实验操作 9
2.4.1 实验预处理 9
2.4.2 工艺参数的选择 10
2.4.3 反冲清洗对膜通量的恢复效果 10
2.4.4 吸附-微滤膜分离组合处理铅酸蓄电池生产废水 10
3 结果与讨论