磨制方式和含氧量对掺烧特性影响实验及动力学分析  

Effects of pulverizing method and oxygen content on combustion characteristics of mixed coal and the kinetic analysis

作　　者：龚德鸿[1,2] 张忠孝[1] 朱兵[2] 钱进[2] GONG Dehong ZHANG Zhongxiao ZHU Bing QIAN Jin(School of Energy and Power Engineering, University of Shanghai for Science and Technology,Shanghai 200093, China School of Electrical Engineering,Guizhou University, Guiyang 550003 ,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]贵州大学电气工程学院,贵州贵阳550003

出　　处：《热力发电》2016年第10期40-49,共10页Thermal Power Generation

基　　金：贵州省社会攻关项目(黔科合SY字[2015]3010);贵州省自然科学基金项目(黔科合J字[2011]2006)

摘　　要：不同磨制方式下的混煤燃烧特性存在差异,这会对锅炉的正常运行产生影响。对此,本文利用同步热分析系统对烟煤和贫煤在2种磨制方式下分别制成的混煤进行实验研究,采用综合燃烧指标差异性相对值和加权值分析了磨制方式、含氧量对混煤燃烧特性的影响,并进行了活化能、指前因子等动力学参数计算和分析。结果表明:不同磨制方式下混煤燃烧特性存在明显差异,磨制方式对燃烧初期的影响最大;提高含氧量可以降低燃烧的差异性,并将燃烧差异最小的劣质煤掺混比例提高10%;混煤燃烧符合一级反应,并存在动力学补偿效应。Combustion characteristics of blended coal entered into boiler furnace has obvious difference when applying different pulverizing methods, which affects normal operation of the boiler. Experimental study was performed on combustion characteristics of the mixture of bituminous coal and lean coal, by using sim- ultaneous thermal analyzer,with two pulverizing methods. The relative value and weight of the comprehen- sive combustion index difference were adopted to analyze the effects of pulverizing method and oxygen con- centration on combustion characteristics of the coal mixtures. Moreover, the kinetic parameters such as ac- tivation energy and frequency factor were also calculated. The results show that, the pulverizing method has a effect on combustion characteristics of the blended coals, especially in initial stage of combustion. Increas- ing the oxygen concentration can decrease the combustion characteristics difference of the blended coals, and the mixed ratio of inferior coal with the minimum combustion characteristics difference will be in- creased by 10 %. The combustion of blended coal is the first-order reaction, which has kinetic compensation effect.

关 键 词：混煤 掺烧 劣质煤 燃烧特性 动力学参数 磨制方式 含氧量 

分 类 号：TQ534[化学工程—煤化学工程]