本项目针对以山西省为代表的我国低热值煤资源化利用重大需求，根据本领域国内外发展现状和趋势，以煤矸石和煤泥等燃料的清洁高效发电超低排放和碳减排为目标，提出了以低热值煤循环流化床富氧燃烧为核心的超临界机组与低浓度甲烷瓦斯气高温氧化热空气循环发电耦合创新解决方案。拟从微观燃烧机理、介观装置结构和宏观系统集成三个层面，开展低热值煤富氧燃烧与成灰特性、硫和氮等污染元素迁移转化与污染物排放特征、循环流化床流型调控与模拟放大等方面研究，掌握O2/CO2/H2O复杂气氛下低热值煤有机质稳定燃烧与矿物质转化规律；探索主要烟气污染物生成机制及排放特性；建立流化床内多组分气固体系流型调控与传递和燃烧耦合复杂工况非线性行为的放大方法，完成超低排放约束条件下多工质多循环发电系统优化，最终构建出低热值煤超临界循环和低浓度甲烷矿井乏气热空气氧化联合发电系统，为低热值煤清洁高效发电和二氧化碳减排奠定理论基础。

Taking Shanxi province as a typical case in China, the proposal reviews the up-to-date progress on low-calorific coal (LCC) as resource. A novel process is suggested by coupling the supercritical steam cycle with LCC oxy-combustion in circulating fluidized bed (CFB) and hot air cycle with low-concentration methane oxidation at high temperatures, which has potential advantages of LCC-fired power generation to meet with ultra-low emissions and easier carbon capture. The multi-level investigation covers from microscale (combustion mechanism) to macroscale (thermodynamic cycle) via mesoscale (CFB device). This proposal will try to explore the synergetic effect of organic matter combustion, minerals transformation and emissions control of low-calorific coal combustion at O2/CO2/H2O complex atmospheres, to establish a nonlinear scaling-up rule coupling flow pattern control, process transfer and oxy-combustion in CFB, and to optimize the overall system of supercritical steam and hot air cycles by considering ultra-low emission limitation. The main purpose of this project is to form a theory frame for efficient LCC-fired power generation and low-concentration methane utilization in Shanxi and the other coal-produced regions of China.