摘要
在大型循环流化床装置上对提升管的T型出口结构压力降进行了实验研究。首先,在不同实验条件下对循环流化床提升管T型出口结构的压力降进行了实验测量。重点分析了提升管浓度和气体速度与提升管T型出口结构压力降的关系。实验结果表明,由于大型循环流化床提升管T型出口结构处特殊的气流输送机制,循环流化床提升管T型出口结构的压力降主要受提升管T型出口结构处变截面尺寸、提升管出口处流体转向和提升管内气固两相之间摩擦的影响,在循环流化床提升管T型出口结构处形成较大的压力降。循环流化床提升管T型出口结构的压力降与提升管内催化剂浓度的一次方成正比关系,与提升管内气体速度的二次方成正比关系。最后,在实验数据的基础上,给出循环流化床提升管T型出口结构的压力降计算公式。
The pressure drop of the riser T-abrupt exit in a large circulating fluidized bed was experimentally studied.The pressure drop at riser T-abrupt exit of circulating fluidized bed were measured at different experiment conditions,and the relationship between catalyst concentrations and gas velocity in the riser and pressure drop at the riser T-abrupt exit is analyzed.The experimental results demonstrate that,the pressure drop at the riser T-abrupt exit is mainly subject to the impact of the cross section size of riser T-abrupt exit,the turning direction of fluid at riser exit and friction of gas phase and solid phase in the riser because of special gas flow transferring mechanisms,which results in a greater pressure drop at riser T-abrupt exit.The pressure drop is in proportion with first power of catalyst concentration in the riser and in proportion with the quadrate of gas velocity in the riser.The calculation equation for pressure drop at the riser T-abrupt exit is given based upon the experimental data.
出处
《炼油技术与工程》
CAS
2012年第1期38-40,共3页
Petroleum Refinery Engineering
基金
国家自然科学基金(20876170
21176250)
