不同固结力下的煤粉流动特性  

Flowability of Pulverized Coal Under Different Consolidation Stress

作　　者：樊保国[1] 姚力[1] 宋凯[1] 金燕[1] 乔晓磊[1] 韩涛 郎鹏德 

机构地区：[1]太原理工大学电气与动力工程学院,太原030024 [2]山西蓝天环保设备有限公司,太原030006

出　　处：《燃烧科学与技术》2014年第5期418-422,共5页Journal of Combustion Science and Technology

基　　金：山西省社会发展科技攻关资助项目(20130313001-1)

摘　　要：采用JENIKE剪切实验方法对相同粒径的两种不同水分含量的煤粉进行了一系列剪切实验,获得了煤粉的流动函数和其他流动特性参数.研究结果表明,煤粉的剪切力、压实密度、黏聚力和流动函数都随着固结力的增大而增大;固结力为50,kPa时,煤粉的内摩擦角出现最小值;在30,kPa和130,kPa的固结态下,含水率为7.0%的煤粉压实密度比含水率为4.1%的煤粉大,但其黏聚力比含水率为4.1%的煤粉小;在50,kPa、70,kPa和100,kPa固结态下则有相反情况.In this paper,JENIKE shear test method is used to shear pulverized coal. A series of shear tests have been taken with two samples of the same size distribution and different moistures to obtain flow function and some other related parameters of this pulverized coal. Results indicate that the shear force,compaction density,cohesion and flow functions of pulverized coal increase with the increase of consolidation stress. The pulverized coal exhibits minimal internal friction angle value when the consolidation stress is 50,kPa. The compaction density of the sample with 7.0% moisture is larger than that with 4.1% moisture when the consolidation stress is 30,kPa or 130,kPa,whereas cohesion is smaller. When the consolidation stress is 50,kPa,70,kPa and 100,kPa respectively,the result is opposite.

关 键 词：煤粉 固结力 流动特性 含水率 

分 类 号：TQ536.1[化学工程—煤化学工程]