旋流导叶式生物质热解反应器内气固两相涡旋流动特性  

Gas-Solid Two-phase Vortex Flow Characteristics in Guide Vane Type Cyclone Reactors of Biomass Pyrolysis

作　　者：张玉春[1,2] 易维明 李志合[1,2] 付鹏 王娜娜[1,2] 田纯焱 ZHANG Yuchun;YI Weiming;LI Zhihe;FU Peng;WANG Nana;TIAN Chunyan(School of Agricultural Engineering and Food Science,Shandong University of Technology,Zibo 255000,China;Shandong Engineering and Technology Research Center of Clean Energy,Zibo 255000,China)

机构地区：[1]山东理工大学农业工程与食品科学学院,淄博255000 [2]山东省清洁能源工程技术研究中心,淄博255000

出　　处：《农业机械学报》2019年第2期281-289,共9页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金项目(51676116);山东省自然科学基金项目(ZR2018BEE027)

摘　　要：针对生物质现有热解反应器存在的传热效果差、产物与催化剂不能及时分离导致产率降低等问题,采用计算流体力学方法与脉冲示踪实验测量法对旋流导叶式反应器内的固相体积分数梯度分布、停留时间分布等进行了研究。结果表明气固两相在新型反应器不同区域不同强度涡旋流场内哥氏力、离心力的作用下达到了较好的混合接触和分离效果,为实现反应器内的反应分离一体化过程提供了前提。研究发现,当催化剂粒径为10μm、剂气比为10. 5时,反应器达到最佳混合与分离效果。催化剂颗粒停留时间分布曲线呈平滑的单峰分布,拖尾较小,平均停留时间为1. 055～1. 235 s,催化剂颗粒流动接近平推流。Based on the shortcomings of existing reactors in ex-situ catalytic pyrolysis of biomass vapors,the guide vane type cyclong reactor was designed.The gradient distribution and residence time distribution of solid phase in the reactor were studied by using computational fluid dynamics method and pulse tracer experimental method.The research could provide an important theoretical basis for technology improvement of ex-situ biomass catalytic pyrolysis and further design of the reactor.The simulated model was confirmed to be right by comparing with the results of the experiment.The results showed that the gas solid two phases had good mixing contact and separation effects under the action of the Coriolis and centrifugal force in the vortex flow field of different intensities,which provided a key precondition for the realization of reaction separation integration process in the reactor.When the catalyst particle diameter was 10μm and the catalyst to gas ratio was 10.5,the optimal mixing and separation effect of the reactor was achieved.The residence time distribution curves of catalyst particles showed a smooth single peak distribution with small trailing tail,and the average residence time was 1.055~1.235 s.The flow pattern of catalyst particles in the reactor was close to the plug flow.

关 键 词：生物质非原位催化热解 旋流导叶式反应器 气-固两相流 数值模拟 

分 类 号：TK6[动力工程及工程热物理—生物能]