On the basis of annlyzing the main domestic cocurrent combustor , we adopted the up and down - shade - technology to reform the combustonafter researching the characteristics of main coal and its affecting factors , i . e . , density of coal dust , granularity of coal dust , firing characteristics , alteration of coal , we put forward the scheme of coal ' s configuration and reforming plan about structure of combustor and its disposal type . finally , we make a debugging of cool and hot performance and operation optimizing 因此，本文在分析目前国内主要直流燃烧器性能的基础上，选用了上下浓淡燃烧技术，改造了燃烧器；通过对现场燃烧的主要煤种特性及煤粉浓度、煤粉细度、着火特性、煤种变动等的分析研究，提出了配煤方案和燃烧器的结构、布置方式改造方案；最后进行了冷、热态性能与运行优化调试。
