湮灭辐射法煤炭灰分旁路测量的实现  

Determination of the Ash Content of Coal Using Annihilation Radiation

作　　者：郭红霞[1] 周辉[1] 林东生[1] 常永福[1] 彭宏论[1] 杨海帆[1] 常冬梅[1] 姜景和[1] 方文沐 管维新 

机构地区：[1]西北核技术研究所 [2]西安科灵采制样研究所

出　　处：《核电子学与探测技术》1998年第5期371-374,共4页Nuclear Electronics & Detection Technology

摘　　要：本文所述湮灭辐射法煤炭灰分旁路测量装置采用７．４ＧＢｑ６０Ｃｏγ射线反散射方案，通过６０Ｃｏγ射线照射煤样，测出电子对引起的正电子湮灭辐射峰和康普顿反散射峰的强度来确定灰分。这种方法测量精度高（绝对不确定度小于２％），时间短（小于５ｍｉｎ一组数据），可用于国内煤种复杂煤质以次充好的入口检测，也可用于火力电厂煤种类繁多，煤灰分成分变化较大的上炉监测，以便调整进煤量，节约能源，减少污染。The ash content of coal can be determined by a simple technique based on the simultaneous measurement of 0.511 MeV annihilation radiation and Compton scattering radiation which result from irradiation of a coal sample with γ rays of energy >1.022MeV. These measurements are performed using 60 Co source and NaI(Tl) detector in a backscatter geometry. The advantages of this method are less sensitivity to high Z elements such as Fe and Ca, less sensitivity to moisture variation and potentially greater depth penetration because of the higher energies used. (

关 键 词：煤灰分 湮灭辐射法 康普顿反散射 旁路测量 

分 类 号：TQ533.2[化学工程—煤化学工程]