褐煤低温热解提质试验研究  

Experiment Study on Low Temperature Pyrolysis Upgrading of Lignite

作　　者：初茉[1] 高晶晶[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《煤炭科学技术》2012年第10期95-99,共5页Coal Science and Technology

基　　金："十二五"国家科技支撑计划资助项目(2012BAA04B00);国家自然科学基金委员会与神华集团有限责任公司联合资助项目(U1261101);中央高校基本科研业务费专项资金资助项目(2009KH08)

摘　　要：针对蒙东地区褐煤水分含量高,发热量低,易风化自然,可磨性、成浆性差的问题,对其进行了管式炉低温热解提质试验研究。结果表明:试验优化的低温热解温度为480～520℃,此时半焦挥发分Vdaf为13.32%～16.43%,低位发热量为26.43～27.18 MJ/kg,半焦CO2反应活性大于98%,可磨性性指数大于60,成浆浓度大于60%;半焦着火点为326～342℃,氧化后着火点为305～327℃;原煤干基半焦产率为69.13%～70.46%,焦油产率为3.97%～4.60%。褐煤经过低温热解,发热量明显提高,着火点升高,反应性、可磨性及成浆性良好,并具有较高的电阻率。According to the high moisture content, low calorific value, easy weathering and spontaneous combustion, poor grindability and slurryability and other problems of the lignite from the east part of Inner Mongolia, the study on a tube furnace low temperature pyroly- sis upgrading experiment was conducted with the lignite from the east part of Inner Mongolia. The results showed that the optimized low temperature pyrolysis temperature of the experiment was 480 -520℃, the volatile matter Vda of the semi-coke was 13.32% - 16. 43%, the net calorific value was 26.43 - 27. 18 MJ/kg, the CO2 reduetivity of the semi-coke was over 98% , the grindability index was over 60 and the slurry mass fraction was over 60%. The ignition temperature of the semi-coke was 326 - 342 ℃ and the ignition temperature of the semi-coke oxidized was 305 - 327℃. The semi-coke yield of the raw coal dry basis was 69. 13% - 70. 46% and the tar yield of the raw coal was 3.97% -4. 60%. After the low temperature pyrolysis of the lignite, the calorific value was obviously improved, the ignition temperature was increased, the reaction, grindability and the slurryability were excellent and the resistivity was high.

关 键 词：褐煤 低温热解 半焦 提质 

分 类 号：TQ530.2[化学工程—煤化学工程]