影响富氧燃烧锅炉磨煤机出口温度的运行因素研究  

Study on Operating Parameters Affecting the Pulverizer Outlet Temperature of a Boiler with Oxygen-enriched Combustion

作　　者：张智羽 杨勇平[1] 翟融融[1] 陈伟鹏[2] 肖卓楠[2] ZHANG Zhiyu;YANG Yongping;ZHAI Rongrong;CHEN Weipeng;XIAO Zhuonan(Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education,North China Electric Power University,Beijing 102206,China;School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206 [2]内蒙古科技大学能源与环境学院,内蒙古包头014010

出　　处：《动力工程学报》2020年第2期89-95,共7页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金创新研究群体科学基金资助项目(51821004);国家重点基础研究发展计划资助项目(973计划)(2015CB251505);国家自然科学基金资助项目(51776063);内蒙古自然科学基金资助项目(2018MS05035,2018LH05012);内蒙古高校科研资助项目(NJZZ17161);包头市科技计划资助项目(2019Z3004-4)。

摘　　要：为获得富氧燃烧锅炉磨煤机出口温度随运行因素的变化规律及各因素间的显著性关系,以某600 MW亚临界富氧燃烧锅炉及磨煤机为研究对象建立仿真模型,采用流程模拟的方法分别进行了干燥气中氧含量、漏风系数、排烟中一次循环烟气比例及烟气预热温度等单一因素的扰动研究,并基于正交法进行了多因素耦合及显著性研究。结果表明:富氧燃烧锅炉磨煤机出口温度随干燥气中氧含量的增大而下降,随排烟中一次循环烟气比例、漏风系数的增大及烟气预热温度的升高而上升;各因素显著性关系为排烟中一次循环烟气比例>干燥气中氧含量>漏风系数>烟气预热温度,其中干燥气中氧含量和排烟中一次循环烟气比例影响为特别显著,漏风系数影响为显著,烟气预热温度具有一定影响。To find the variation law of pulverizer outlet temperature with the operating parameters of a 600 MW subcritical boiler with oxygen-enriched combustion, a simulation model was established, based on which, monofactor analysis was conducted by the method of process simulation on the disturbance of various factors, such as the oxygen content in dry gas, the air leakage coefficient, the primary flue gas circulating proportion in exhaust gas, and the flue gas preheating temperature, etc., while multi-factor coupling and significant study were carried out using orthogonal method. Results show that the exit temperature of coal mill decreases with the rise of oxygen content in dry gas, which increases with the rise of the primary flue gas circulating proportion in exhaust gas, the air leakage coefficient and the flue gas preheating temperature. The significant relationship of various factors is as follows:the primary flue gas circulating proportion in exhaust gas > oxygen content > air leakage coefficient > flue gas preheating temperature. Among all the factors, the influences of both the oxygen content in dry gas and the primary flue gas circulating proportion in exhaust gas are particularly significant, the influence of air leakage coefficient is significant, while the preheating temperature of flue gas has influence in a certain degree.

关 键 词：富氧燃烧锅炉 磨煤机出口温度 正交设计 运行因素 显著性关系 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]