管束式除雾器结构优化数值模拟及高效除雾器研制

doi:10.11930/j.issn.1004-9649.201706151

中国电力 ›› 2018, Vol. 51 ›› Issue (5): 134-140.DOI: 10.11930/j.issn.1004-9649.201706151

管束式除雾器结构优化数值模拟及高效除雾器研制

邱桂芝, 张志刚, 宋寅, 郭婷婷, 王海刚, 贾嘉, 王鹤麒

中国大唐集团科学技术研究院火力发电技术研究所, 北京 100040

收稿日期:2017-06-26 修回日期:2017-12-18 出版日期:2018-05-05 发布日期:2018-05-07
作者简介:邱桂芝(1987-),女,河北保定人,博士,工程师,主要从事燃煤电厂全烟气多场耦合系统优化设计,E-mail:qiuguizhi@cdt-kxjs.com
基金资助:
中国大唐集团多污染物协同脱除与均衡控制关键技术研究与示范项目（CDT1-17-02）。

Numerical Simulation on Tube Bundle Demister and Development of High Efficiency Demister

QIU Guizhi, ZHANG Zhigang, SONG Yin, GUO Tingting, WANG Haigang, JIA Jia, WANG Heqi

Institute of Thermal Power Generation Technology, China Datang Corporation Science and Technology Research Insitute, Beijing 10040, China

Received:2017-06-26 Revised:2017-12-18 Online:2018-05-05 Published:2018-05-07
Supported by:
This work is supported by Research and Demonstration Project of Key Technology for Multiple Pollutants Removal and Balance Control of Datang Group (No.CDT1-17-02).

摘要/Abstract

摘要： 为配合烟尘超低排放改造，基于流体动力学计算方法，对湿法烟气脱硫系统中管束式除雾器内的气液两相流流场进行了数值模拟，同时将双筒结构引入管束式除雾器，通过改变筒体结构和叶片结构参数，分析得到了管束式除雾器对不同粒径液滴的脱除效率和除雾器压损的变化规律。研究结果表明，双筒结构+多级串联是提高除雾效率，特别是提高小液滴脱除效率的有效方法；曲线型叶片出口角、叶长和叶片数变化会对除雾效率和压降造成较大影响。在此基础上，进一步提出了3种高效管束式除雾器型式并经冷态试验台验证，其中1种优选构型已在某电厂300MW机组除雾器改造中应用。运行结果表明，该除雾器各项性能指标良好，在机组50%~100%的宽负荷范围内，烟尘排放质量浓度均小于5mg/m³（标态，干基，6% O₂），机组满负荷时除雾器最大阻力小于300 Pa。

关键词: 管束式除雾器, 数值模拟, 烟气脱硫, 除雾效率, 烟尘超低排放

Abstract: The computational fluid dynamics (CFD) method is used to simulate numerically the two-phase gas-liquid flow in tube bundle demister of wet flue gas desulfurization (WFGD) system for ultra-low dust emission. The double tube structure is introduced into the tube bundle demister. In addition, by modifying the parameters of the tube structure and the blade structure, the effects of structural parameters of the tube bundle demister on demisting efficiency and pressure loss are investigated. The results show that the double tube structure with multistage-series can effectively improve the demisting efficiency, especially for small droplets. The variation of outlet angle, leaf length and leaf number of curvilinear blade have significant impacts on the efficiency of fog removal and pressure drop. On this basis, three types of high-efficiency tube bundle demister are further proposed and then verified by virtue of cold test bench, with one of the optimized prototype applied in the retrofit of the demister of 300 MW power plant. The operation results exhibited satisfactory performance with the mass concentration of soot emission lower than 5 mg/m³(dry base, 6%O₂) under 50%~100% unit load while the max resistance below 300 Pa under full load operation.

Key words: tube bundle demister, numerical simulation, flue gas desulfurization, demisting efficiency, dust ultra-low emission

中图分类号:

X511
TM621.9

邱桂芝, 张志刚, 宋寅, 郭婷婷, 王海刚, 贾嘉, 王鹤麒. 管束式除雾器结构优化数值模拟及高效除雾器研制[J]. 中国电力, 2018, 51(5): 134-140.

QIU Guizhi, ZHANG Zhigang, SONG Yin, GUO Tingting, WANG Haigang, JIA Jia, WANG Heqi. Numerical Simulation on Tube Bundle Demister and Development of High Efficiency Demister[J]. Electric Power, 2018, 51(5): 134-140.

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https://www.electricpower.com.cn/CN/Y2018/V51/I5/134

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管束式除雾器结构优化数值模拟及高效除雾器研制

Numerical Simulation on Tube Bundle Demister and Development of High Efficiency Demister

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管束式除雾器结构优化数值模拟及高效除雾器研制

Numerical Simulation on Tube Bundle Demister and Development of High Efficiency Demister

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