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Application of membrane coupled chemical dehardening technology in zero discharge process of circulating wastewater

Authors： ZHOU Jianqiang，ZHANG Zhichao，DONG Qinghua，BI Fei，ZHANG Lin

Units： 1.Ningxia Coal Mine Design and Research Institute Co., Ltd,Yinchuan 750004,China); 2.Ld Membrane Advanced Material Technology Co., Ltd,Beijing 100010,China ; 3. College of Chemical and Biological Engineering, Zhejiang University ,Hangzhou 310058,China

KeyWords： circulating cooling sewage; membrane coupled chemical dehardening; removalofhardness; short process; zero discharge

ClassificationCode：TQ028；X703.1

year,volume(issue):pagination： 2024,44(1):91-95

Abstract：

Membrane coupled chemical dehardeningtechnology is innovatively used to replace the traditional combination process of"high-density pool + V-type filter + ultrafiltration".The polycrystalline silicon circulating cooling sewage is pre-treated with membrane coupled chemical dehardening to remove hardness and turbidity, and then directly enters the "cation bed+reverse osmosis system" process.A high water recovery rate and short process technology route of " membrane coupled chemical dehardening +cation bed+multi-stage reverse osmosis" was proposed.The engineering practice results indicate that the technical route operates reliably and can significantly shorten the process flow, reduce operating energy consumption, extend the regeneration cycle of the cation bed, and make the water recovery rate of the whole system reach more than 90%at the same time.

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AuthorIntro：

周建强（1974-），男，宁夏中宁人，研究方向为水处理新工艺与技术

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