喉管式催化裂化原料喷嘴雾化性能研究  

Study on atomization performance of throat type nozzlesin catalytic cracking feed

作　　者：刘璐 李国智 王松江 崔凌云 Liu Lu;Li Guozhi;Wang Songjiang;Cui Lingyun(Luoyang R&D Center of Technology of SINOPEC Engineering(Group)Co.,Ltd.,Luoyang,Henan 471003)

机构地区：[1]中石化炼化工程(集团)股份有限公司洛阳技术研发中心,河南省洛阳市471003

出　　处：《炼油技术与工程》2024年第7期33-36,共4页Petroleum Refinery Engineering

基　　金：中国石油化工集团有限公司项目(JKL21007)。

摘　　要：通过喷嘴雾化试验与模拟数值的交叉验证,分析了喉管式喷嘴的内部流动情况和雾化情况,建立了适用的模拟模型。结果表明:在试验和模拟条件下,喷嘴出口雾滴呈扇形喷出,分布较均匀;喷嘴出口雾滴粒径呈单峰分布,索达尔平均粒径模拟结果(67.2μm)与试验结果(78.0μm)的偏差为-13.8%,平均速度模拟结果(55.1 m/s)与试验结果(49.3 m/s)的偏差为11.8%,模型准确性较高。模拟研究发现:液相在预混室发生一次雾化,在喉管处发生二次雾化,经喷嘴出口喷出,粒径减小至67.2μm。该结果为喉管式喷嘴的结构优化、改进设计提供了依据。Through cross validation of nozzle atomization experiments and numerical simulations,the flow inside the LPC throat type nozzle and the atomization outside the nozzle were analyzed,and a suitable simulation model was established.The results show that under the test and simulation conditions,the thin and thick distribution of droplets on the whole spray surface at the nozzle outlet is relatively uniform,and the droplets are fan-shaped.The droplet size distribution at the nozzle outlet is unimodal,and the error of SMD at nozzle outlet(78.0μm)compared to simulation results(67.2μm)is-13.8%,and the error between the experimental results of average droplet velocity(49.3 m/s)and the simulation results(55.1 m/s)is 11.8%.The accuracy of the model is relatively high.Simulation shows that the liquid phase undergoes primary atomization in the premix chamber,secondary atomization at the throat,and then flows through the nozzle and sprays out,reducing the particle size to 67.2μm.This result lays the foundation for the structural optimization of throat type nozzles and provides theoretical and experimental basis for the improvement design of such nozzles.

关 键 词：喉管式 催化裂化 原料喷嘴 雾化性能 预混合室 速度云图 压力云图 雾滴粒径分布 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]