中速磨煤机直吹式制粉系统节能优化研究  

Research on energy-saving optimization for medium-speed mill pulverizing systems

作　　者：张海龙 杨光锐 井新经 邢乐强 刘超[1] 党黎军[1] ZHANG Hailong;YANG Guangrui;JING Xinjing;XING Leqiang;LIU Chao;DANG Lijun(Xi’an Thermal Power Engineering Institute Company Limited,Xi'an 710054,China;Xi’an TPRI Energy Conservation Technology Company Limited,Xi'an 710054,China)

机构地区：[1]西安热工研究院有限公司,西安710054 [2]西安西热节能技术有限公司,西安710054

出　　处：《华电技术》2020年第6期25-30,共6页HUADIAN TECHNOLOGY

摘　　要：随着可再生能源的大力发展,火电厂面临着严峻的节能降耗形势。为进一步降低制粉系统能耗,深入分析磨煤机出口温度和一次风压的节能降耗原理,并探讨了两者之间的耦合关系,确定了最佳优化策略。结合理论分析,按照先优化磨煤机出口温度再优化一次风压的顺序开展节能优化试验。通过试验,磨煤机出口温度可提高至80℃,在300,450,600MW负荷下一次风压分别控制在6.5,8.0,9.0kPa,并给出了一次风压随负荷变化曲线。优化后,机组煤耗可降低0.38g/(kW·h),取得了较好的经济效益,为制粉系统开展节能优化工作提供参考。As the vigorous development of renewable energy,coal-fired power plants are facing severe challenge in energy saving and consumption reduction.In order to reduce the energy consumption of pulverizing systems,intensive study was made on consumption reduction by controlling thetemperature at mill outlet and optimizing primary air pressure,and thecoupling relationship between the two controlling strategies.The optimal optimization strategy was determined after theoretical analysis.The optimization test was carried out fromcontrollingthe temperature at mill outlet tooptimizing the primary air pressure.The temperature at mill out goes up to 80℃after the test,and the primary air pressure can be controlled at6.5,8.0 and 9.0 kP a respectively under the load of 300,450 and 600 MW.The curve of primary air pressure changing with the load is given.After the optimization,the coal consumption of the unit can be reduced by 0.38 g/(kW·h).The optimization is of good economic benefits,and can provide reference for energy saving for pulverizing systems.

关 键 词：中速磨煤机 制粉系统 磨煤机出口温度 一次风压 节能 可再生能源 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]