流化床热解反应器布风系统数值模拟研究  

NUMERICAL SIMULATION OF AIR DISTRIBUTION SYSTEM IN FLUIDIZED BED PYROLYSIS REACTOR

作　　者：吴兴 马善为 李凯[1] 朱锡锋[1] Wu Xing;Ma Shanwei;Li Kai;Zhu Xifeng(Anhui Province Key Laboratory of Biomass Clean Energy, CAS Key Laboratory of Urban Pollutant Conversion, University of Science and Technology of China, Hefei 230026, Chin)

机构地区：[1]中国科学技术大学安徽省生物质洁净能源重点实验室中国科学院城市污染物转化重点实验室

出　　处：《太阳能学报》2018年第4期1038-1044,共7页Acta Energiae Solaris Sinica

基　　金：国家重点基础研究发展(973)计划(2013CB228103);中国科学院重点部署项目(KGZD-EW-304-3)

摘　　要：在常见生物质流化气速范围内,利用Fluent软件对流化床热解反应器的布风系统进行数值模拟研究,结果表明：在风室底部气速呈现出中间高于两侧的不一致现象;送风管道进口流量越大,风室临界高度值越大;蘑菇形风帽内部结构较为简单,阻力主要集中在进出口部位,开孔率和进口尺寸与风帽的阻力呈负相关关系,出口孔的排布形式不影响风帽的阻力特性,但对床内流场有较大影响;从阻力-流量关系的角度看,布风板上的风帽相当于并联关系,但风帽的排布方式对床内流场有很大影响,在开孔率相同的情况下,三角形排布更有利于床层内流场的均匀分布。In the common biomass fluidization gas speed range, the numerical simulation of air distribution system of fluidized bed pyrolysis reactor was carried out using Fluent software. The results show that the gas speed at the bottom of the wind chamber shows an inconsistency phenomenon, the gas speed in the middle is higher than that in both sides, and the critical height of the wind chamber increases with the increase of inlet flow of the flue pipe; the internal structure of mushroom-cap is relatively simple, and its resistance mainly concentrate in the inlet and outlets. The cap resistance has a negative correlation with the perforated ratio and the inlet size, the arrangement of the outlets doesn＇ t affect the resistance characteristics of wind cap, however, there is significant effect on the flow field in the bed. From the point of view of resistance-flow relationship, the wind cap on the air distribution board is equivalent to the parallel connection, but the arrangement of wind cap has a great influence on the flow field in the bed. In the case of the same opening rate, the triangular arrangement is more conducive to the uniform distribution of the flow field in the bed.

关 键 词：流化床 布风系统 蘑菇形风帽 布风板 数值模拟 

分 类 号：TQ021.1[化学工程]