Research progress on deep treatment and reclamation of coal gasification wastewater

doi:10.11949/j.issn.0438-1157.20150770

Abstract

Abstract:

The treatment of coal gasification wastewater is difficult because of its complex composition and many contaminants with high concentrations, such as oils, phenols and NH₃-N. In this paper, the compositions and characteristics of the wastewater from coal gasification were analyzed and the feasibility of recent technologies for the deep treatment and reclamation of it were reviewed. Aiming to overcome the shortcomings of different technologies and to obtain high water recovery, the feasibility of multi-membrane technologies (ultrafiltration, nanofiltration, reverse osmosis, electrodialysis) for treating it deeply was specially discussed. At last, an outlook on the development trends of the technologies for the deep treatment and reclamation of coal gasification wastewater was given.

Key words: coal gasification wastewater, deep treatment, reclamation, multi-membrane technology, recovery

摘要：

煤气化废水水质复杂,污染物浓度高,处理难度大。分析了煤气化废水的组成及特点,概述了煤气化废水深度处理与回用的工艺现状。针对不同工艺存在的问题,以提高水回收率为重点,探讨了多膜工艺(超滤、纳滤、反渗透、电渗析)深度处理煤气化废水的可行性,展望了煤气化废水深度处理与资源化利用工艺的发展方向。

关键词: 煤气化废水, 深度处理, 回用, 多膜工艺, 回收率

CLC Number:

X703

ZHANG Runnan, FAN Xiaochen, HE Mingrui, SU Yanlei, JIANG Zhongyi. Research progress on deep treatment and reclamation of coal gasification wastewater[J]. CIESC Journal, 2015, 66(9): 3341-3349.

张润楠, 范晓晨, 贺明睿, 苏延磊, 姜忠义. 煤气化废水深度处理与回用研究进展[J]. 化工学报, 2015, 66(9): 3341-3349.

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