Study and Application on Membrane-based Wastewater Zero Liquid Discharge Technology in a Power Plant

被引：0
|
作者：
Xu Z. [1 ]
Zhao Y. [1 ]
Lu M. [1 ]
Xu F. [1 ]
机构：
[1] Beijing Lucency Enviro-Tech Co., Ltd, CHN Energy Group, Haidian District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷
关键词：
Desulfurization wastewater; Membrane method; Power plant; Recycling; Zero-Liquid-Discharge;
D O I：
10.13334/j.0258-8013.pcsee.190505
中图分类号：
学科分类号：
摘要：
In recent years, the "Zero-Liquid-Discharge" of power plant wastewater has been increasingly important, especially for the power plants settled in the water source protection areas and northwest of China. According to bottlenecks of Zero-Liquid-Discharge technology, like low water production rate, secondary polluted salt-mixture by- products, a full-membrane Zero-Liquid-Discharge technology was explored for desulfurization wastewater advanced treatment, which followed a novel "Softening & TUF+NF & SCRO/XRO+MVR" treatment route. This route comprises three subsystems and six core technical units, which respectively realize the functions of pretreatment, salt concentration and evaporation crystallization. Innovated automatic dry powder dosing system coupled tubular membrane system to realize the integration of chemical softening, sedimentation and filtration, of that shortened the process flow and saved 15%~20% investment cost; Explored special NF and two-stage RO system to achieve high-efficiency salt-concentration and meanwhile reduce the 85% quantity of wastewater influent. This technology achieved zero emission of wastewater and comprehensive utilization of water and solid waste resources, which accomplished over than 93% freshwater production rate and obtained highly purified NaCl salt. Corresponding Zero-Liquid-Discharge route has been certified its high efficiency and high stability in the full-scale application in Hanchuan Power Plant. The operating cost of system is 32 ¥/t that of half cost of other Zero-Liquid- Discharge full-scale projects. © 2019 Chin. Soc. for Elec. Eng.
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页码：148 / 154
页数：6
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