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Chemcial Industry and Engineering 2019, Vol. 36 Issue (1) :24-37    DOI: 10.13353/j.issn.1004.9533.20181067
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Status and Prospect of Zero Liquid Discharge Technologies for Flue Gas Desulfurization Wastewater in Thermal Power Plant
Zheng Libing1,2,3, Wei Yuansong1,2,3, Jiao Yunyi4, Wang Gang5, Yue Zenggang5
1. State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Beijing 100085, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Beijing Key Laboratory of Industrial Wastewater Treatment and Reuse, Research Center for Eco-Environmental Sciences, Beijing 100085, China;
4. School of Civil Engineering, University of South China, Hunan Hengyang 421001, China;
5. Huaneng Jiaxiang Power Generation Co. Ltd., Shandong Jining 272400, China

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Abstract The application and research status of flue gas desulfurization wastewater (FGDW) treatment technologies were reviewed under the more and more strict environmental policies and the intensive requirements of zero liquid discharge (ZLD) in China. With high suspend solids (SS), high salinity, complicated composition, and significant fluctuation of the FGDW, conventional treatment technologies of the FGDW face big challenges such as unstable performance which cannot meet with the discharge standard, serious scaling and corrosion issue, and concentrate discharge, etc. The application of conventional treatment technologies and their improved processes were mainly reviewed, which cannot meet with the standard and have been transferred to pretreatment process in ZLD application. Then the ZLD technologies for FGDW and their development trend were carefully reviewed in terms of pretreatment process, heavy metal removal processes, wastewater concentration and reduction technologies, and salts crystallization technologies. And the research & development of ZLD technologies for FGDW wastewater and some typical application cases of ZLD project were summarized, and the combination of membrane separation, evaporation and crystallization will be the key technologies for the ZLD of FGDW treatment. It was believed that ZLD treatment would become the major approach in the ZLD of FGDW, and the development of new materials, equipments, and technologies will promote the industrial application of ZLD project for FGDW in thermal power plant.
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Zheng Libing
Wei Yuansong
Jiao Yunyi
Wang Gang
Yue Zenggang
Keywordsflue gas desulfurization wastewater;   zero liquid discharge;   membrane separation;   evaporation-crystallization;   pretreatment     
Received 2018-11-14;
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Zheng Libing, Wei Yuansong, Jiao Yunyi, Wang Gang, Yue Zenggang.Status and Prospect of Zero Liquid Discharge Technologies for Flue Gas Desulfurization Wastewater in Thermal Power Plant[J]  Chemcial Industry and Engineering, 2019,V36(1): 24-37
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