Numerical Simulation of Key Parameters of Zero Discharge System for WFGD Wastewater

doi:10.11930/j.issn.1004-9649.201802041

Abstract

Abstract: The evaporation technology of WFGD wastewater in the flue gas before it enters ESP is studied by numerical simulation. The impacts of the six parameters on droplet residence time and evaporation distance are investigated, i.e., droplet size, flue gas temperature, flue gas velocity, wastewater volume, jet velocity and jet angle of wastewater. The results show that the higher of the flue gas temperature, the smaller of the droplet size and the injection amount, the less residence time of the droplet will last. With the increase of flue gas velocity, injection velocity and injection angle, the residence time tends to decrease first and then rise afterwards. The research results can provide support for project decision-making process and design optimization.

Key words: coal-fired power generation, flue gas desulfurization, numerical simulation, WFGD waste water, zero-emission

CLC Number:

X51
TM621

WENG Weiguo, SUN Jianguo, LI Qinwu, ZHOU Can, JIANG Shanxing. Numerical Simulation of Key Parameters of Zero Discharge System for WFGD Wastewater[J]. Electric Power, 2018, 51(6): 42-47.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201802041

https://www.electricpower.com.cn/EN/Y2018/V51/I6/42

References

[1] 朱法华. 燃煤电厂烟气污染物超低排放技术路线的选择[J]. 中国电力, 2017, 50(3):11-16.ZHU Fahua. Methodologies on choosing appropriate technical route for ultra low emission of flue gas pollutants from coal-fired power plants[J]. Electric Power, 2017, 50(3):11-16.
[2] 宋佩珊, 梁龙妮, 吴锦泽. 广东省燃煤机组超低排放改造成本收益分析[J]. 中国电力, 2017, 50(3):55-59.SONG Peishan, LIANG Longni, WU Jinze. Cost benefit analysis on coal-fired unit modification with ultra-low emission in Guangdong[J]. Electric Power, 2017, 50(3):55-59.
[3] 郭彦鹏, 潘丹萍, 杨林军. 湿法烟气脱硫中石膏雨的形成及其控制措施[J]. 中国电力, 2014, 47(3):152-154, 159.GUO Yanpeng, PAN Danping, YANG Linjun. Formation and control of gypsum rain in wet flue gas desulfurization[J]. Electric Power, 2014, 47(3):152-154, 159.
[4] 魏宏鸽, 叶伟平, 柴磊, 等. 湿法脱硫系统除尘效果分析与提效措施[J]. 中国电力, 2015, 48(8):33-36.WEI Hongge, YE Weiping, CHAI Lei, et al. Analysis of dust removal effect in wet-FGD system and its efficiency-enhancement techniques[J]. Electric Power, 2015, 48(8):33-36.
[5] 刘定平, 陆培宇. 旋流雾化技术在464000 m³/h烟气湿法脱硫中的应用[J]. 中国电力, 2015, 48(8):130-134.LIU Dingping, LU Peiyu. Application of swirl spray technology in 464000-m³/h wet flue gas desulphurization[J]. Electric Power, 2015, 48(8):130-134.
[6] 武春锦, 吕武华, 梅毅, 等. 湿法烟气脱硫技术及运行经济性分析[J]. 化工进展, 2015, 34(12):4368-4374.WU Chunjin, LU Wuhua, MEI Yi, et al. Application and running economic analysis of wet flue gas desulfurization technology[J]. Chemical Industry and Engineering Progress, 2015, 34(12):4368-4374.
[7] 叶春松, 黄建伟, 刘通, 等. 燃煤电厂烟气脱硫废水处理方法与技术进展[J]. 环境工程, 2017, 35(11):10-13.
[8] 马双忱, 于伟静, 贾绍广, 等. 燃煤电厂脱硫废水处理技术研究与应用进展[J]. 化工进展, 2016, 35(1):255-262.MA Shuangchen, YU Weijing, JIA Shaoguang, et al. Research and application progresses of flue gas desulfurization (FGD) wastewater treatment technologies in coal-fired plants[J]. Chemical Industry and Engineering Progress. 2016, 35(1):255-262.
[9] HOQUE S, ALEXANDERT, GURIAN P L. Innovative technologies increase evaporation pond efficiency[J]. IDA Journal of Desalination and Water Reuse, 2010, 2(1):72-78.
[10] 于伟静. 脱硫废水蒸发处理系统研究[D]. 北京:华北电力大学, 2016.
[11] 郦建国, 郦祝海, 何毓忠, 等. 低低温电除尘技术的研究及应用[J]. 中国环保产业, 2014(3):28-33.LI Jianguo, LI Zhuhai, HE Yuzhong, et al. Research and application on electric precipitation technology with low-low temperature[J]. China Environmental Protection Industry. 2014(3):28-33.
[12] 刘含笑, 姚宇平, 郦建国, 等. 低低温条件下飞灰工况比电阻特性[J]. 洁净煤技术, 2017, 23(5):125-128.LIU Hanxiao, YAO Yuping, LI Jianguo, et al. Resistivity characteristics of fly ash under low-low temperature[J]. Clean Coal Technology, 2017, 23(5):125-128.
[13] 王晓华. 静电场中水对颗粒物脱除增强机理与过程[D]. 北京:清华大学, 2013.
[14] 柴峰. 脱硫废水蒸发的调控与机制研究[D]. 北京:华北电力大学, 2016.
[15] 钟毅, 高翔, 王惠挺, 等. 基于CFD技术的湿法烟气脱硫系统性能优化[J]. 中国电机工程学报, 2008, 28(32):18-23.ZHONG Yi, GAO Xiang, WANG Huiting, et al. Performance optimization of wet flue gas desulphurization system based on CFD technology[J]. Proceedings of the CSEE, 2008, 28(32):18-23.
[16] 马力, 仇性启, 郑志伟, 等. 高温气流中液滴蒸发影响因素的数值研究[J]. 石油化工, 2013(8):886-890.MA Li, QIU Xingqi, ZHENG Zhiwei, et al. Numerical research on influencing factors of droplet evaporation in high temperature airflow[J]. Petrochemical Technology, 2013(8):886-890.
[17] 王贞涛, 郭天宇, 朱忠辉, 等. 蒸发液滴内部非稳态流动的数值计算[J]. 热科学与技术, 2017, 16(4):273-279.WANG Zhentao, GUO Tianyu, ZHU Zhonghui, et al. Numerical study on transient flow in evaporating droplet[J]. Journal of Thermal Science and Technology, 2017, 16(4):273-279.
[18] 孙卓, 肖丛杰, 周乐平, 等. 含颗粒液滴蒸发的沉积和内部流动特性[J]. 工程热物理学报, 2016, 37(12):2602-2606.SUN Zhuo, XIAO Congjie, ZHOU Leping, et al. The depositions and internal flow characteristics of drying droplets containing particles[J]. Journal of Engineering Thermophysics, 2016, 37(12):2602-2606.