摘要
采用TG-DTG和DTA(热重-热重微分和差热)技术分析研究了褐煤、烟煤以及无烟煤混煤的燃烧特性,获取了混煤燃烧的特性参数,如着火温度(Tb)、最大失重温度(Tm)以及燃尽温度(Tf).TG-DTG结果表明,升温速率为20℃/min时基本能够反映三种煤样的热解特性;DTA结果表明,无烟煤与褐煤之比为3∶7时,烟煤与褐煤之比为3∶7时混煤具有较好的燃烧特性.
The combustion characteristics of three different ranks of coals（lignite,bituminous coal and anthracite） and their blend were studied by using the differential thermal-thermogravimetric analysis（DTA-TG）.The results of TG curves indicated that the best heating rate was 20 ℃/min.Some combustion parameters,such as ignition temperature（Tb）,maximum combustion rate temperature（Tm） and char burn-out temperature（Tf） was obtained.The differential thermal analyzer（DTA） curve can be used to estimate the heat released during the combustion process,which corresponds to the high heating value of the coal.The results of DTG and DTA indicated that the optimum ratio of coal blending for anthracite/lignite and bituminous coal/lignite were 3∶7 and 3∶7 respectively.
出处
《煤炭转化》
CAS
CSCD
北大核心
2011年第3期67-70,共4页
Coal Conversion
基金
中电投集团公司资助项目(20090295)
关键词
燃烧特性
混煤
差热热重
combustion characterist
coal blending
TG-DTA
