Structural optimization of baffle internals for fast particle pyrolysis in a downer reactor using the discrete element method

作     者：Bing Liu 

作者机构：National Institute of Clean-and-Low-Carbon EnergyCHN Energy InvestmentBeijing 102211P.R.China 

出 版 物：《Clean Energy》 (清洁能源（英文）)

年 卷 期：2021年第5卷第2期

页      面：167-179页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

主　　题：structural optimization baffle internals downer reactor DEM coal pyrolysis 

摘      要：The structural optimization of baffle internals for fast pyrolysis of coal with particulate mixing and heat transfer in a downer reactor using the discrete element method(DEM)has been investigated in this *** pyrolysis terminal temperature at the exit of the downer reactor is not only decided by the volume-feeding-rate ratio of the coal to the sand,but also is affected by the inner structural design of the baffle internals in the downer *** presented in the previous publication of the author,the inhibition from the baffle internals in a downer reactor can improve the particulate-mixing degree and heat carrier,and increase the mean residence time of the coal and heat-carrier particles in the downer *** structure of the baffle internals in the downer reactor mentioned in this research can be optimized by the independently developed 3D soft-sphere model of the DEM programme of a 40-mm baffle length,a 30°baffle-slope angle and at least four baffles designed in the downer reactor,which is beneficial for the process design of coal pyrolysis with a heat carrier in the downer reactor.