富氧燃烧锅炉热效率及火用效率影响因素研究  

Study on Influencing Factors of Thermal Efficiency and Exergy Efficiency of Oxygen-rich Boiler

作　　者：张智羽 杨勇平[1] 翟融融[1] ZHANG Zhiyu;YANG Yongping;ZHAI Rongrong(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,Baotao 014010,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：《华北电力大学学报（自然科学版）》2019年第6期81-89,共9页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金创新研究群体科学基金(51821004);国家自然科学基金资助项目(51776063);国家重点基础研究发展计划项目(973计划)(2015CB251505);内蒙古自然科学基金资助项目(2014MS0531,2018MS05035)

摘　　要：为得到对富氧锅炉热效率及[火用]效率具有影响的各运行因素间的显著性关系,采用流程模拟的方法,在获得了氧气纯度、氧气浓度、排烟中一次循环烟气比例、过量氧气系数等典型运行参数对富氧锅炉热效率及[火用]效率影响规律的基础上,采用正交法对多因素耦合作用进行了研究,并通过极差、方差分析研究各因素的影响程度,确定各因素间的显著性关系。结果表明:各因素对于热效率的影响关系为:氧气浓度>过量氧气系数>排烟中一次循环烟气比例>氧气纯度;对[火用]效率的影响关系为:氧气浓度>过量氧气系数>氧气纯度>排烟中一次循环烟气比例。其中,氧气浓度对热效率的影响程度为特别显著,过量氧气系数对热效率的影响程度为显著;氧气浓度、过量氧气系数对[火用]效率的影响程度均为显著。In order to obtain the significant relationship between the operating factors that affect the thermal efficiency and screw efficiency of oxygen-enriched boilers,process simulation method and orthogonal method were applied to obtain the influence of typical operating parameters,such as oxygen purity,oxygen concentration,the ratio of primary circulating flue gas in exhaust gas,excess oxygen coefficient,on the thermal efficiency and screw efficiency of oxygen-enriched boilers.The influence degree of each factor was analyzed by range analysis and variance analysis,and the significant relationship between each factor was determined.The results show that the effects of various factors on thermal efficiency are as follows:oxygen concentration>excess oxygen coefficient>ratio of primary circulating flue gas in exhaust smoke>oxygen purity;and the effects on exergy efficiency are as follows:oxygen concentration>excess oxygen coefficient>oxygen purity>ratio of primary circulating flue gas in exhaust smoke.Among them,the influence of oxygen concentration on thermal efficiency is particularly significant,and the influence of excess oxygen coefficient on thermal efficiency is outstanding,and the influence of oxygen concentration and excess oxygen coefficient on exergy efficiency is remarkable.

关 键 词：富氧燃烧 热效率 [火用]效率 正交法 显著性 

分 类 号：TM621.2[电气工程—电力系统及自动化]