MB型风扇磨煤机提升压头影响因素分析
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摘要
本文通过在MB型风扇磨煤机上的冷态和热态测试,得到了在纯空气和带粉状态下磨煤机的通风量、出力、入口负压、出口压力及提升压头之间的相关性,分析了MB型风扇磨煤机提升压头的各种影响因素,得到磨煤机的出力、通风量以及煤的可磨性指数等关键指标对MB型风扇磨煤机提升压头的影响规律。结果表明:冷态试验时随着磨煤机出口通风量的升高,磨煤机入口阻力降低、出口阻力升高,且磨煤机出口阻力升高幅度大于入口阻力降低幅度,因此磨煤机提升压头下降;热态试验时磨煤机提升压头随着磨煤机出口通风量的增加而升高,且磨煤机出力增加对提升压头的负向作用大于目前的计算方法;MB型风扇磨煤机通风特性和研磨特性与现有的S型风扇磨煤机有较大不同但又具有一定相似性。该结论可为MB型风扇磨煤机设计和运行提供参考。
Through the cold and hot state tests on the MB type fan mill, the correlation among ventilation volume, mill output, negative pressure of the entrance, pressure of the mill outlet and the promotion pressure head in pure air and air with coal powder states was obtained, and the factors affecting the promotion pressure head of the MB type fan mill were investigated, thus the effects of key indexes such as mill output, ventilation volume and HGI index of the coal on the MB type fan mill's promotion pressure head were obtained. The cold test results show that, with the increase of mill outlet ventilation, the mill entrance resistance decreased, the outlet resistance increased, and the increase of the mill outlet resistance was larger than the decrease of the entrance resistance, so the promotion pressure head of the mill declined. The hot test results show that, the promotion pressure head of the mill increased with the mill outlet ventilation, and the negative effect of the mill output on the promotion pressure head was greater than the results calculated by current calculation method. The ventilation and grinding characteristics of the MB type fan mill has great difference but with a certain similarity with that of the S type fan mill. The conclusion can provide technical reference for design and operation of the MB type mill.
Through the cold and hot state tests on the MB type fan mill, the correlation among ventilation volume, mill output, negative pressure of the entrance, pressure of the mill outlet and the promotion pressure head in pure air and air with coal powder states was obtained, and the factors affecting the promotion pressure head of the MB type fan mill were investigated, thus the effects of key indexes such as mill output, ventilation volume and HGI index of the coal on the MB type fan mill's promotion pressure head were obtained. The cold test results show that, with the increase of mill outlet ventilation, the mill entrance resistance decreased, the outlet resistance increased, and the increase of the mill outlet resistance was larger than the decrease of the entrance resistance, so the promotion pressure head of the mill declined. The hot test results show that, the promotion pressure head of the mill increased with the mill outlet ventilation, and the negative effect of the mill output on the promotion pressure head was greater than the results calculated by current calculation method. The ventilation and grinding characteristics of the MB type fan mill has great difference but with a certain similarity with that of the S type fan mill. The conclusion can provide technical reference for design and operation of the MB type mill.
引文
[1]戴少康.选煤工艺设计实用技术手册[M].北京:煤炭工业出版社,2010:53-54.DAI Shaokang.Practical technology manual of coal preparation process design[M].Beijing:Coal Industry Press,2010:53-54(in Chinese).
[2]谈琪英,雷平和,汤晓舒,等.1 000 MW超超临界褐煤锅炉制粉系统选型优化[J].电力建设,2011,32(5):11-12.TAN Qiying,LEI Pinghe,TANG Xiaoshu,et al.Study on type-selection optimization of coal pulverizing for1 000 MW super-critical lignite boiler[J].Electric Power Struction,2011,32(5):11-12.
[3]陈扣军.印尼高水分褐煤制粉系统选型分析[J].科技资讯,2012(24):77.CHEN Koujun.Analysis on the selection of pulverizing system forhigh moisture lignite in Indonesia[J].Science&Technology Information,2012(24):77.
[4]何佩敖,张肃.我国风扇磨煤机制粉系统的设计问题[J].电站系统工程,1991(2):32-35.HE Peiao,ZHANG Su.Design problem of fan mill pulverized coal preparation system in domestic[J].Power System Engineering,1991(2):32-35.
[5]张安国,梁辉.电站锅炉煤粉制备与计算[M].北京:中国电力出版社,2010:44-45.ZHANG Anguo,LIANG Hui.Coal pulverization and calculation of power plant[M].Beijing:China Electric Power Press,2010:44-45.
[6]高航,于治民.华能九台电厂一期工程风扇磨煤机选型计算[J].企业技术开发,2014,33(12):6-8.GAO Hang,YU Zhimin.Type selection calculation of fan mill for Huaneng Jiutai phase I project power plant[J].Technology Development of Enterprise,2014,33(12):6-8.
[7]赵勇.新型风扇磨煤机的特点与工作特性[J].科技创业家,2014(8):93.ZHAO Yong.Features and working property of new fan mill[J].Technical Enterpriser,2014(8):93.
[8]商俊,李岳.风扇磨煤机运行中密封风特性变化对机组的影响[J].电站系统工程,2016,32(2):69-71.SHANG Jun,LI Yue.Influence of the fall mill sealing air changing characteristics to the operation of unit[J].Power System Engineering,2016,32(2):69-71.
[9]李强,李学飞,李平,等.MB3600/1170/490风扇磨煤机选型研究[J].矿山机械,2013,41(4):75-78.LI Qiang,LI Xuefei,LI Ping,et al.Study on type selection of fan mill MB3600/1170/490[J].Mining Machinery,2013,41(4):75-78.
[10]火力发电厂制粉系统设计计算技术规定:DL/T 5145-2010[S].Technical code for design and calculation of pulverized coal preparation system of fossil-fired power plant:DL/T5145-2010[S].
[11]许世森,张安国.运行工况与风扇磨煤机提升压头的相关性研究[J].热力发电,1994,23(5):12-18.XU Shisen,ZHANG Anguo.Correlation study of the fan mill between the operation condition and promotion pressure[J].Thermal Power Generation,1994,23(5):12-18.
[12]电站磨煤机及制粉系统选型导则:DL/T 466-2004[S].Guide for type selection for pulverizers and pulverizing systems of power station:DL/T 466-2004[S].
[13]于强,顾玮伦.超临界燃褐煤塔式锅炉技术[J].能源研究与信息,2012,28(1):24-25.YU Qiang,GU Weilun.Technology of supercritical brown coal boiler with tower-type[J].Energy Research and Information,2012,28(1):24-25.
[14]马煜,李希国.大型风扇磨煤机磨制高水分褐煤运行特性研究[J].电站系统工程,2012,28(1):35-36.MA Yu,LI Xiguo.Research on operation of large fan mill grinding high-moisture lignite[J].Power System Engineering,2012,28(1):35-36.
[15]鲁文恭,杨忠灿,张安国.大型褐煤电站锅炉风扇磨煤机选型试验[J].热力发电,2014,43(12):95-98.LU Wengong,YANG Zhongcan,ZHANG Anguo.Experimental study on fan mill type selection in large lignite-fired power plants,Thermal Power Generation,2014,43(12):95-98.
[2]谈琪英,雷平和,汤晓舒,等.1 000 MW超超临界褐煤锅炉制粉系统选型优化[J].电力建设,2011,32(5):11-12.TAN Qiying,LEI Pinghe,TANG Xiaoshu,et al.Study on type-selection optimization of coal pulverizing for1 000 MW super-critical lignite boiler[J].Electric Power Struction,2011,32(5):11-12.
[3]陈扣军.印尼高水分褐煤制粉系统选型分析[J].科技资讯,2012(24):77.CHEN Koujun.Analysis on the selection of pulverizing system forhigh moisture lignite in Indonesia[J].Science&Technology Information,2012(24):77.
[4]何佩敖,张肃.我国风扇磨煤机制粉系统的设计问题[J].电站系统工程,1991(2):32-35.HE Peiao,ZHANG Su.Design problem of fan mill pulverized coal preparation system in domestic[J].Power System Engineering,1991(2):32-35.
[5]张安国,梁辉.电站锅炉煤粉制备与计算[M].北京:中国电力出版社,2010:44-45.ZHANG Anguo,LIANG Hui.Coal pulverization and calculation of power plant[M].Beijing:China Electric Power Press,2010:44-45.
[6]高航,于治民.华能九台电厂一期工程风扇磨煤机选型计算[J].企业技术开发,2014,33(12):6-8.GAO Hang,YU Zhimin.Type selection calculation of fan mill for Huaneng Jiutai phase I project power plant[J].Technology Development of Enterprise,2014,33(12):6-8.
[7]赵勇.新型风扇磨煤机的特点与工作特性[J].科技创业家,2014(8):93.ZHAO Yong.Features and working property of new fan mill[J].Technical Enterpriser,2014(8):93.
[8]商俊,李岳.风扇磨煤机运行中密封风特性变化对机组的影响[J].电站系统工程,2016,32(2):69-71.SHANG Jun,LI Yue.Influence of the fall mill sealing air changing characteristics to the operation of unit[J].Power System Engineering,2016,32(2):69-71.
[9]李强,李学飞,李平,等.MB3600/1170/490风扇磨煤机选型研究[J].矿山机械,2013,41(4):75-78.LI Qiang,LI Xuefei,LI Ping,et al.Study on type selection of fan mill MB3600/1170/490[J].Mining Machinery,2013,41(4):75-78.
[10]火力发电厂制粉系统设计计算技术规定:DL/T 5145-2010[S].Technical code for design and calculation of pulverized coal preparation system of fossil-fired power plant:DL/T5145-2010[S].
[11]许世森,张安国.运行工况与风扇磨煤机提升压头的相关性研究[J].热力发电,1994,23(5):12-18.XU Shisen,ZHANG Anguo.Correlation study of the fan mill between the operation condition and promotion pressure[J].Thermal Power Generation,1994,23(5):12-18.
[12]电站磨煤机及制粉系统选型导则:DL/T 466-2004[S].Guide for type selection for pulverizers and pulverizing systems of power station:DL/T 466-2004[S].
[13]于强,顾玮伦.超临界燃褐煤塔式锅炉技术[J].能源研究与信息,2012,28(1):24-25.YU Qiang,GU Weilun.Technology of supercritical brown coal boiler with tower-type[J].Energy Research and Information,2012,28(1):24-25.
[14]马煜,李希国.大型风扇磨煤机磨制高水分褐煤运行特性研究[J].电站系统工程,2012,28(1):35-36.MA Yu,LI Xiguo.Research on operation of large fan mill grinding high-moisture lignite[J].Power System Engineering,2012,28(1):35-36.
[15]鲁文恭,杨忠灿,张安国.大型褐煤电站锅炉风扇磨煤机选型试验[J].热力发电,2014,43(12):95-98.LU Wengong,YANG Zhongcan,ZHANG Anguo.Experimental study on fan mill type selection in large lignite-fired power plants,Thermal Power Generation,2014,43(12):95-98.