【摘要】 为研究层流炉反应管内气固两相流的运动规律,设计制造一套1∶1的冷态透明玻璃实验装置。在主气流氩气流量为1.0、1.5、2.0、2.5 m3/h时,利用粒子图像测试技术(PIV)对反应管内氩气流(以水蒸气为示踪粒子)和生物质半焦颗粒速度场进行测量。结果表明:在反应管中心处,氩气速度和生物质半焦颗粒的轴向速度相差较大,不能用氩气速度代替颗粒速度。通过对实验数据的分析计算,获得反应管内雷诺数与生物质半焦颗粒停留时间(无量纲处理后)的关联式。可将该结果用于计算热解挥发特性实验的颗粒停留时间,从而优化颗粒停留时间的计算方法,为建立更加合理的热解动力学模型提供依据。更多还原

【Abstract】 An investigation of argon(using vapor as tracer particle)and char powder motion in laminar entrained flowreactor have been carried out at different flow rate of 1.0-2.5 m3/h using particle image velocimetry(PIV). The resultsindicated that the difference of the velocity distributions at center of the pipe between argon and biomass semicoke is big.By analyzing the measured data,the linear relationship between Re of Argon and the dimensionless residential time ofbiomass semicoke was obtained. This result can be used to calculate the residential time of biomass semicoke in the flashdevolatilization characteristics experiment,which optimizes the calculating of residential time of biomass semicoke andoffers evidence for more reasonable kinetic model of biomass pyrolysis.更多还原