不同煤种挥发氮析出过程的数值模拟与试验研究  

Numerical Simulation and Experimental Study of the Separation-release Process of Volatile Nitrogen from Various Sorts of Coal

作　　者：周昊[1] 翁安心[1] 岑可法[1] 樊建人[1] 

机构地区：[1]浙江大学能源清洁利用和环境工程教育部重点实验室,浙江杭州310027

出　　处：《热能动力工程》2004年第2期127-130,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点基础研究专项经费资助(G2001CB409600);国家自然科学基金资助项目(50206018)

摘　　要：采用数值模型研究了烟煤、贫煤和无烟煤等不同煤种热解、燃烧过程中挥发分氮的析出、中间含氮产物HCN的生成以及转变为NO的过程。利用有限体积方法对质量、化学组分、动量和热量守恒方程进行离散求解。计算获得了不同煤种的颗粒着火时间、热解过程、孔隙率、HCN和NO生成率等数据,并与沉降炉试验结果进行了比较,分析。With the help of a numerical model a study was carried out regarding the following items. They include the separation-release of volatile nitrogen, the generation of intermediate nitrogen-containing product HCN and the process of the latter's transformation into NO. All the above took place in the course of pyrolysis and combustion of various types of coal, such as bituminous coal, lean coal and anthracite. A finite volume method was utilized to perform a discrete solution for the equations of mass, chemical components, momentum and heat energy conservation. Through calculations a whole variety of data were obtained, such as the coal particle ignition time of various ranks of coal, pyrolysis process, porosity factor, HCN and NO formation rate. In addition, the above data were also compared with the test results of a subsidence furnace followed by a pertinent analysis.

关 键 词：燃料氮 煤粉 数值模拟 

分 类 号：X701.3[环境科学与工程—环境工程]