深部煤层地下气化化学点火方法研究及数值模拟  

Research and numerical simulation of the chemical ignition of underground coal gasification in a deep coal seam

作　　者：梁新星[1] 孙春宝[1] 梁杰[2] 沈芳[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《北京科技大学学报》2013年第1期8-15,共8页Journal of University of Science and Technology Beijing

基　　金：国家高技术研究发展计划"煤炭地下气化产业化关键技术"项目(2011AA050106)

摘　　要：通过对适合地下气化点火煤层的条件和煤质进行分析,设计了深部煤层地下气化化学点火装置以及化学点火模型试验台.当点火剂中硅烷与氧气的体积比为1:3.33、点火剂压力保持在0.3 MPa时,点火区温度上升速率600℃·h^(-1),最高温度达到800℃,完全能够将模拟深部煤层点燃.利用数值模拟软件FEMLAB对点火过程中煤层温度场做了计算机数值模拟.当煤层点火区温度设定为1366℃时,温度场的扩展速率为28.75℃·min^(-1),与采用模型试验得到的温度变化趋势基本一致.The equipment and model test rig were designed for the chemical ignition of underground coal gasifi- cation （UCG） in a deep coal seam after analyzing the coal seam condition and coal quality which were suitable for UCG ignition. When the volmne ratio of silane to oxygen in the igniting composition keeps 1：3.33 and the pressure of the igniting composition maintains 0.3 MPa, the temperature rise rate in the ignition zone reaches 600 ℃.h-1 the maximum temperature rises to 800 ℃, which can achieve UGC ignition in a deep coal seam. The temperature field of the coal seam was simulated on computer by the numerical simulation software FEMLAB. When the temperature in the ignition zone of the coal seam sets to 1366 ℃, the growth rate of the temperature field is 28.75 ℃.min-1, which is consistent with the temperature change trend in model experiment.

关 键 词：煤炭地下气化 深部煤层 化学点火 计算机模拟 

分 类 号：TD843[矿业工程—煤矿开采] TQ546.1[矿业工程—矿山开采]