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首页> 外文期刊>Separation and Purification Technology >Effects of anti-scaling and cleaning chemicals on membrane scale in direct contact membrane distillation process for RO brine concentrate
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Effects of anti-scaling and cleaning chemicals on membrane scale in direct contact membrane distillation process for RO brine concentrate

机译：RO盐水浓缩液直接接触式膜蒸馏工艺中防垢清洗剂对膜垢的影响

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摘要

Membrane distillation (MD) is a promising desalination technology for water recovery from reverse osmosis (RO) brine. However, calcium sulfate as the major pollutant in RO brine concentrates induces scale occurrence in MD. Effective control of membrane scaling and cleaning of the membrane module are the key technologies for the industrialization of MD. In this work, effects of four anti-scaling and five cleaning agents on calcium sulfate scaling in direct contact membrane distillation (DCMD) process were investigated and discussed. It was found that membrane scaling and wetting was significantly alleviated with the addition of an effective anti-scaling agent. The flux recovery of a membrane with five cleaning agents was also improved and the flux recovery using a 2% EDTA-4Na solution was obtained as high as 92.8% at 77 degrees C. (C) 2015 Elsevier B.V. All rights reserved.
机译：膜蒸馏（MD）是一种很有前景的脱盐技术，可用于从反渗透（RO）盐水中回收水。但是，硫酸钙是RO盐水浓缩物中的主要污染物，会引起MD结垢的发生。有效控制膜的结垢和膜组件的清洁是MD工业化的关键技术。在这项工作中，研究和讨论了四种防垢剂和五种清洁剂对直接接触膜蒸馏（DCMD）过程中硫酸钙垢的影响。发现通过加入有效的防垢剂可以显着减轻膜的结垢和润湿。具有五种清洁剂的膜的通量回收率也得到了改善，使用2％EDTA-4Na溶液在77摄氏度下的通量回收率高达92.8％。（C）2015 Elsevier B.V.保留所有权利。

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