中文摘要：

为了确定在固体热载体加热方式下反应温度和停留时间对生物质热解挥发特性的影响,设计了陶瓷球热载体加热下降管式生物质热解实验装置,并进行了生物质热解挥发特性实验。该实验装置能够对反应温度进行精确控制,实现生物质粉和陶瓷球热载体按比例连续均匀喂料及热解残炭样品的采集。实验物料为玉米秸秆粉,反应温度分别为450、500、550℃。停留时间通过反应物在反应管内下降距离间接测量,下降距离分别为150、550、850、1 150 mm。利用灰分示踪法计算得到了不同条件下生物质的热解挥发率。实验结果表明：玉米秸秆粉的热解挥发率随着热解温度的升高、下降距离的加长而非线性增大。

英文摘要：

In order to investigate the effects of reaction temperature and reaction distance on the pyrolysis volatilization characteristics of biomass in a down-flow tube reactor,a ceramic ball heated down-flow tube reactor was designed and fabricated,and biomass pyrolysis experiments were conducted in the reactor.The experimental apparatus could control the reaction temperature precisely,feed the biomass and heat carrier evenly and continuously.Pulverized corn stalk powder was used as the feed stock.Reaction temperatures were 450℃,500℃ and 550℃.The falling distances,which was the indirect measure of the residence time,were 150mm,550mm,850mm and 1150mm.Ash tracer method was used to calculate the volatilized fractions of the pyrolyzed biomass at different experimental conditions.The experimental results showed that the volatilized fraction of corn stalk powder increased nonlinearly with the increase of reaction temperature and residence time.