陶瓷膜处理复合密封材料纸机白水的研究

来源 :2016全国特种纸技术交流会暨特种纸委员会第十一届年会 | 被引量 : 0次 | 上传用户:down678
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本文分别对粗滤、自然沉降以及絮凝预处理三种预处理方法进行了对比,结果显示絮凝预处理后的废水CODcr及SS的去除率明显高于其他两种预处理方式;进而对预处理过程中絮凝过程的影响因素(絮凝剂种类、絮凝剂用量、温度等)进行了系统的优化.在膜分离的过程中,采用孔径为1.4μm、0.8μm、0.2μm、50 nm及20 nm的陶瓷膜进行了分离特性研究,结果表明孔径较小的20 nm膜不仅具有较为稳定的通量,且对CODcr、SS、浊度均有较好的去除效果;对孔径为20nm膜过滤性能进行了系统的研究,优化了操作温度、过膜压差和膜面流速等条件.透过液水质指标满足工业废水回用标准,可以代替部分新鲜水,实现节水.最后针对膜工业化应用中存在的共性问题膜污染进行了重点研究,结果显示处理复合材料白水后的膜经清洗后通量可以恢复到之前98%.最终在采用陶瓷膜分离系统在复合材料生产车间进行的中试试验与实验室结果基本吻合.
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