摘要
针对某化工厂固定床加氢反应器内的气体流场进行三维数值模拟,考察了不同气体预分布器类型、结构参数对反应器内气流分布的影响。计算结果表明,在反应器入口布置气体预分布器能够明显改善反应器内气体流动的均匀性;随预分布器的布置高度增加,气体均布性能提高,但同时会导致预分布器上方产生较大旋流,延长气体停留时间;减小预分布器孔板的倾斜角度能有助于提高预分布器的均布性能,当孔板倾斜角度为20°~40°时,预分布器具有较好的气体均布效果;增大预分布器的开孔尺寸对其均布性能的影响相对较小,但能够有效降低分布器对入口气流的阻力,改善分布器上方的气体流动状态;在设计预分布器时,需要综合考虑孔板倾斜角度和开孔尺寸两项结构参数的影响,以实现最佳的气流分布效果。
The gas flow field in a fixed bed hydro-processing reactor was investigated based on a three-dimensional numerical simulation.The effects of different gas pre-distributor types and structural parameters on the flow distribution in the reactor were studied.The calculation results show that arranging a gas pre-distributor at the inlet of the reactor could significantly improve the uniformity of gas flow in the reactor.As the installation height of the pre-distributor increased,its gas distribution uniformity performance was improved,but at the same time a large vortex was generated above the pre-distributor,which prolonged the gas residence time.Reducing the tilt angle of the orifice plate could help to improve the distribution uniformity performance of the distributor.When the tilt angle was 20°-40°,the pre-distributor had a better gas uniform distribution effect.Increasing the pore size of the pre-distributor had relatively little effect on its distribution uniformity performance,but could effectively reduce the resistance of the distributor to the inlet airflow and improve the gas flow state above the distributor.In order to achieve the best air distribution effect,it was necessary to comprehensively consider the influences of both structural parameters of the tilt angle and the hole size in the designing process.
作者
钟骏良
涂齐辉
吴刚
李刚
何磊
梁健
Zhong Junliang;Tu Qihui;Wu Gang;Li Gang;He Lei;Liang Jian(Ningbo Juhua Chemical&Science Co.,Ltd.,Ningbo Zhejiang 315203,China;Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China)
出处
《石油化工》
CAS
CSCD
北大核心
2021年第5期441-447,共7页
Petrochemical Technology
关键词
加氢反应器
气体预分布器
流场
数值模拟
hydro-processing reactor
gas pre-distributor
flow field
numerical simulation
