基于双燃料原煤仓的混煤灵活掺烧NO_(x)生成特性研究  

Study on NO_(x) Generation Characteristics of Flexible Blended Coal Combustion Based on Dual-Fuel Raw Coal Bunker

作　　者：臧义纯 王雷 王超伟 刘辉[2] Zang Yichun;Wang Lei;Wang Chaowei;Liu Hui(China National Energy Group Taicang Power Generation Co.,Ltd.,Suzhou 215400,China;Xi'an Thermal Engineering Research Institute Co.,Ltd.,Xi'an 710054,China)

机构地区：[1]国家能源集团太仓发电有限公司,江苏苏州215400 [2]西安热工研究院有限公司,陕西西安710054

出　　处：《广东化工》2025年第5期1-4,共4页Guangdong Chemical Industry

基　　金：国家能源集团江苏电力有限公司科技项目(JSKJ-2023-14)。

摘　　要：本文利用化学反应动力学软件对基于双燃料原煤仓的混煤灵活掺烧NO_(x)生成特性进行了研究,并利用敏感性分析法和生成速率分析法对混煤的氮迁移特性进行了深入分析。结果显示:随着主燃区过量氧系数和燃烧温度的提高,混合燃料的NO_(x)生生成量均呈现上升趋势;无烟煤质量分数的提高也会使得混合燃料NO_(x)生成量增加。HCN与NH_(3)向NO_(x)的转化路径不同,而HOCN、NCO、NH_(2)和HNO均可视为混合燃料氮向NO_(x)转化的关键中间产物。并且,烟煤挥发出的自由基离子与CH_(4)等物质发生的化学反应会影响NO_(x)的生成。本研究为推动我国双燃料原煤仓多煤种高效低NO_(x)掺烧和能源结构转型具有重要意义。In this paper,the NO_(x) generation characteristics of the flexible blending of mixed coal based on dual-fuel raw coal bunker were studied by using chemical reaction kinetics software,and the nitrogen migration characteristics of the mixed coal were deeply analyzed by using sensitivity analysis method and generation rate analysis method.The results show that with the increase of excess oxygen coefficient and combustion temperature in the main combustion zone,the NO_(x) generation of the mixed fuel shows an upward trend;the increase of the mass fraction of anthracite will also increase the NO_(x) generation of the mixed fuel.HCN and NH_(3) have different conversion pathways to NO_(x),while HOCN,NCO,NH_(2) and HNO can all be regarded as key intermediates for the conversion of nitrogen in mixed fuel to NO_(x).In addition,the chemical reaction between the free radical ions volatilized by bituminous coal and substances such as CH_(4) will affect the generation of NO_(x).This study is of great significance for promoting the efficient and low-NO_(x) blending of multiple coal types in dual-fuel raw coal bunkers and the transformation of energy structure in my country.

关 键 词：双燃料原煤仓 混煤掺烧 化学反应动力学 NO_(x)生成特性 氮迁移 

分 类 号：TK16[动力工程及工程热物理—热能工程]