1000MW塔式锅炉深度调峰下再热蒸汽温度与NO_(x)运行特性优化研究  

Research on Operation Behavior Optimization of Reheat Steam Temperature and NO_(x) Concentration During Deep Peak Shaving in a 1 000 MW Tower Boiler

作　　者：孙波 薛广达 毛金伟 SUN Bo;XUE Guangda;MAO Jinwei(CHN Energy Zhejiang Ninghai Power Generation Co.,Ltd.,Ningbo 315612,China)

机构地区：[1]国能浙江宁海发电有限公司,浙江宁波315612

出　　处：《锅炉技术》2023年第1期55-58,共4页Boiler Technology

摘　　要：早期投运的部分塔式锅炉存在着再热蒸汽温度偏低和脱硝入口NO_(x)浓度偏高的问题。研究了塔式锅炉深度调峰下炉内燃烧状态以及换热特性,分析了炉内燃烧状态对辐射换热、对流换热比例的影响规律,根据研究成果,综合运用燃烧调整手段,显著提升了深度调峰状态下的再热蒸汽温度并降低了脱硝入口NO_(x)浓度,锅炉运行经济性显著提升,研究成果对同类型机组的运行优化调整有重要的参考意义。Some tower boilers put into operation in the early days have the problems of low reheat steam temperature and high NO_(x)concentration at denitration inlet. In this paper, the combustion state and heat transfer characteristics of tower boilers are investigated during deep peak shaving operation and the effects of combustion state upon the ratio between heat transfer by radiation and heat transfer by convection are found. Based upon the findings, the combined combustion measures are applied in a 1 000 MW tower boiler, and significant increase in reheat steam temperature and reduction in NO_(x)concentration are achieved together. The operation economy of the boiler is improved significantly. The research results of this paper have important reference significance for the operation optimization and adjustment of the same type of units.

关 键 词：塔式锅炉 深度调峰 深度空气分级燃烧 再热蒸汽温度 NO_(x) 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]