Numerical investigation on cold flow dynamics of supercritical water fluidized bed reactor with inclined distributor: Design and scale up  

作　　者：Yinghui Wu Hao Zhang Xizhong An Zhiye Chen 

机构地区：[1]Key Laboratory for Eoogical Metaurgyof Multimetllic Mineral of Ministry of Education,School of Meallurgy,Northaster University,Shenyng 110819,China

出　　处：《Particuology》2022年第8期90-102,共13页颗粒学报（英文版）

基　　金：the National Natural Science Foundation of China(grant No.12072071);the Natural Science Foundation of Liaoning Province(grant No.2019-MS-125)for the financial support on this research.

摘　　要：Supercritical water fuidized bed reactor(SCWFBR)is a novel concept for the gasification of coal and biomass to produce hydrogen.In this work,to enhance the mixing in the axial direction,an inclined distributor is introduced to optimize the flow dynamics in SCWFBR with partitioned fluid supply.Through numerical simulations based on the two fluid model(TFM),the effects of the inclined distributor structure and operating parameters on the solid distribution and the residence time are evaluated with the optimal values determined.Numerical results show that,area ratio-2:1,scw velocity ratio-3:1,flow ratio=3.36:1 and inclination angle=20°are the optimal design in this paper.A predictive correlation of the minimum fluidization velocity for the improved SCWFBR is also proposed based on the numerical data.The average error between the correlation and numerical simulation results is approximately 1.4%which strongly demonstrates its capability.Finally,based on the optimal design,the labscale reactoris further scaled up and the studies about twoscale-uprules are carried out.Only the cold flow is simulated in this study without considering chemical reaction which would be involved in future work.

关 键 词：Numerical simulation Flowdynamics Supercritical water fluidized bed reactor Inclineddistributor Scale-up 

分 类 号：O35[理学—流体力学]