摘要：在提升管高度为17 m,内径为0.1m的密相输运床实验装置上,实验研究J阀充气流化数(Nj)、J阀斜管充气流化数(Ni)、温度、压力对J阀返料影响。结果表明:在温度和Nj相同下,Ni和压力对固体循环流率基本没有影响;在常温下,Nj≤10时,随着流化数的增加固体循环流率(Gs)呈现线性增加的趋势,当Nj>10时,系统运行出现不稳定现象,固体循环流率波动较大;在相同的Ni下,温度越高固体循环流率越小。建立了Gs为38~750 kg/(m²·s)范围内与Nj的关联式。

关键词：J 阀；两相流；固体循环流率；流化数

Abstract：Flow characteristics of high flux J-valve were investigated in a pressurized dense transport bed. The effects of the fluidization numbers of J-valve(Nj), the inclined pipe of J-valve(Ni) temperature and pressure on recycle device were researched.Experiment results indicate that the fluidization numbers of the inclined pipe of J-valve(Ni) and the pressure have no effect on solids circulation rates when the temperature and fluidization numbers of J-valves(Nj) are constant. The solids circulation rate increases with the increasing of Njwhen Njis less than 10.Fluidization instability occurs when Njis greater than 10 at room temperature. Solids circulation rate decreases with the increasing of temperature when Njis constant. Correlations of solids circulation rates up to 750 kg/(m²·s) and Njwere established.

Keywords: J-valve；two-phase flow；solids circulation rate；fluidization number