烟道降阻解决引风机失速的分析与应用  

Analysis and Application on Flue Gas Duct Resistance Reduction for Stall of the Induced Draft Fan

作　　者：王绍民 李德永[2] 闫姝[1] 史绍平[1] 穆延非[1] Wang Shaomin;Li Deyong;Yan Shu;Shi Shaoping;Mu Yanfei(State Key Laboratory of Coal-based Clean Energy, Huaneng Clean EnergyResearch Institute Co., Ltd., Beijing 102209, China;Huaneng Yimin Power Plant, Hulunbuir 021114, Inner Mongolia Autonomous Region, China)

机构地区：[1]中国华能集团清洁能源技术研究院有限公司煤基清洁能源技术国家重点实验室,北京102209 [2]华能伊敏电厂,内蒙古呼伦贝尔021114

出　　处：《发电设备》2021年第5期359-364,共6页Power Equipment

基　　金：国家重点研发计划资助(2019YFE0100100)。

摘　　要：某燃煤电厂550 MW机组完成超低排放改造后,出现了引风机失速的问题。对排烟系统开展了压降特性测量,并建立了压降预测模型,同时利用数值模拟技术对脱硫系统的烟道进行优化。结果表明:引风机失速的原因为脱硫系统的实际运行阻力高于设计值,并且相对于理论失速线,引风机的实际运行失速线向右下方发生了偏移。对脱硫系统烟道进行优化后,解决了引风机失速的问题。To slove the problem that the induced draft fan of a 550 MW unit in a coal-fired power plant stalled after the ultra-low emission retrofit,the tests of pressure drop characteristics were carried out for the flue gas exhaust system,and the prediction model of pressure drop was established.After which,the ducts of the desulfurization system were optimized through numerical simulation.Results show that the stall of the induced draft fan is caused by the increase of the actual operation resistance of the desulfurization system relative to the design value.Meanwhile,compared with the the theoretical stall line,the actual operation stall line shifts to the lower right direction.With the optimization of the ducts of the desulfurization system,the stall of the induced draft fan can be solved.

关 键 词：燃煤电厂 引风机 失速 烟道 压降 脱硫系统 除雾器 

分 类 号：TM621.2[电气工程—电力系统及自动化]