水分随煤阶及水热变化的核磁共振研究  

Change of moisture of different coal ranks and after hydrothermal dewatering reactions with nuclear magnetic resonance method

作　　者：张旭[1] 刘建忠[1] 吴君宏[1] 赵琛杰[1] 周俊虎[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2016年第1期123-128,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家"973"重点基础研究发展规划资助项目(2010CB227001)

摘　　要：为了获得不同煤阶以及不同温度水热反应条件下煤中水分的变化规律,研究煤样核磁共振弛豫信号特性.研究发现,核磁共振(NMR)方法可以用于煤的水质量分数检测,能够检测出结晶水.水热反应可以有效地脱除煤中水分,反应温度越高,脱除效果越明显.随着煤阶的升高,煤中水分的横向弛豫时间变短,水分受束缚的程度变大;随着水热反应的温度升高,煤中水的质量分数大幅降低,横向弛豫时间变短,受束缚程度变大.A nuclear magnetic resonance（NMR）spectrum detector was used to analyze the characteristics of its relaxation signals in order to get the change trend of moisture in different coal ranks and different hydrothermal dewatering reactions of temperatures.Results show that the NMR method can be used for the measurement of moisture content,and crystal water can be measured.Dewatering reactions is an effective way for coal drying,and the effect gets better as the temperature gets higher.As the coal rank gets higher,the transversal relaxation time of moisture becomes shorter and the bound force becomes larger.As the hydrothermal dewatering temperature gets higher,the moisture content becomes lower,the transversal relaxation time becomes shorter and the bound force becomes larger.

关 键 词：核磁共振(NMR) 水质量分数 煤阶 水热反应 横向弛豫时间 

分 类 号：TK01[动力工程及工程热物理]