CAJ | 학술논문

针对电厂掺烧褐煤缺乏相关理论指导的技术需求，采用热重分析方法系统考察了包煤、准煤和褐煤的单独燃烧特性，并将两种烟煤分别以10％、30％、50％和70％的比例在相同条件下与褐煤混合燃烧，根据各燃料燃烧特征参数计算了单一煤种及其不同掺混比例的着火指数、燃尽指数和综合燃烧指数。结果表明，褐煤最易着火和燃尽；包煤着火特性较好，但在550～660℃范围内出现难燃峰致使燃尽特性变差；准煤的着火特性最差，燃尽特性略优于包煤；将包煤和准煤与褐煤掺混后燃烧特性有所改善，各燃烧特征温度降低，且综合燃烧指数随褐煤掺烧比例的增加而增加。建议在电厂实际应用时，褐煤的掺烧比例控制在30％－50％之间。
침대전엄참소갈매결핍상관이론지도적기술수구，채용열중분석방법계통고찰료포매、준매화갈매적단독연소특성，병장량충연매분별이10％、30％、50％화70％적비례재상동조건하여갈매혼합연소，근거각연료연소특정삼수계산료단일매충급기불동참혼비례적착화지수、연진지수화종합연소지수。결과표명，갈매최역착화화연진；포매착화특성교호，단재550～660℃범위내출현난연봉치사연진특성변차；준매적착화특성최차，연진특성략우우포매；장포매화준매여갈매참혼후연소특성유소개선，각연소특정온도강저，차종합연소지수수갈매참소비례적증가이증가。건의재전엄실제응용시，갈매적참소비례공제재30％－50％지간。
Based on the actual requirement for fundamental theory of blending lignite in coal-fired power stations, combustion characteristics of lignite, bituminous coal and their blends were investigated by using thermogravimetric method ( TGA) in this paper.Lignite was blended with two types of bituminous coals in proportions of 10%, 30%, 50%and 70%, respectively.The ignition index, burnout index and comprehensive combustion index of single and mixed fuels were calculated by means of combustion characteristic parameters.The results show that lig-nite displays the best ignition and burnout performace, Bao coal is easier to ignite but hard to burn out in the tem-perature range of 550 and 660℃.Compared to Bao coal, Zhun coal is the hardest to ignite but better to burn out. The performance of combustion can be improved after blending lignite, which is largely because the comprehensive combustion index of blended coals increases with the increasing ratio of lignite.Therefore, the blending ratio of lig-nite suggested lignite ration should be controlled between 30%and 50%.