油茶果壳固定床低氧烘焙及产物理化性质研究  

Low-oxygen torrefaction of Camellia oleifera shell in fixed bed and products' properties

作　　者：李辉[1] 黄忠良[1] 吴子剑[1] 刘汝宽[1] 张轩[1] 徐佳娈[1] 覃晓莉[1] 李昌珠[1] 

机构地区：[1]湖南省林业科学院,湖南长沙410004

出　　处：《湖南林业科技》2017年第1期8-13,共6页Hunan Forestry Science & Technology

基　　金：湖南省林业科技计划"油茶壳改性制备重金属吸附剂和酚醛泡沫保温材料研究"(XLK201552);湖南省林业科技计划"湘江流域典型区域森林植被重金属阻截与吸储能力调查及潜力分析"(XLK201553);湖南省林业科技计划"锰矿区污染场地植被生态修复技术规程"(XLK201503);湖南省科技计划项目社会发展领域技术创新项目(2016SK2045)

摘　　要：油茶果壳资源化利用是当今林业系统研究的热点问题之一。本研究将油茶果壳碎屑在固定床反应器中低氧烘焙,以期利用燃烧尾气替代氮气,在获得较佳理化性质烘焙产物的同时,降低烘焙工艺成本。试验结果表明:烘焙产物的热值随失重的提高而升高,然而能量收率表现为相反的规律。同时,烘焙产物的堆积密度则呈现先降低后升高的趋势,并在失重25.80%处达到最低值。通过成型过程提高该条件下的堆积密度,并结合含水率、能量收率和能量密度的变化规律,失重25.80%处的工艺条件(烘焙温度270℃和载气含氧量9%)有望成为工业应用的选择。The application of Camellia oleifera Abel, shell has become one of interesting fields in forestry research of Hunan. In the present work, C. oleifera shell was torrefied in a fixed bed with carrier gas as nitrogen or mixture of nitrogen and oxygen. The objective of this work is to identify the potential issue on nitrogen replacement by those mixture, resulting in the production of higher-quality torrefied shell with lower cost. The higher heating value of torrefied shells was enhanced with weight loss increasing, while the energy yield of those was shown as an opposite trend. Meanwhile, the lowest bulk density of torrefied shell was obtained at the weight loss of 25.80%. Therefore, a pelletization process is required for that kind of torrefied shell to increase the bulk density, and consequently provided toirefaction temperature 270℃, and oxygen content 9% as a promising parameter for industrial application.

关 键 词：油茶果壳 固定床 烘焙 

分 类 号：TK6[动力工程及工程热物理—生物能]