喷嘴布置对提升管内气-固流动特性及传热传质的影响  

EFFECT OF NOZZLE ARRANGEMENT ON GAS-SOLID FLOW CHARACTERISTICSAND HEAT AND MASS TRANSFER INSIDE THE RISER

作　　者：王松江 崔凌云 李国智 刘璐 Wang Songjiang;Cui Lingyun;Li Guozhi;Liu Lu(SINOPEC Engineering(Group)Company Luoyang R&D Center of Technology,Luoyang,Henan 471032)

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,河南洛阳471032

出　　处：《石油炼制与化工》2024年第9期52-61,共10页Petroleum Processing and Petrochemicals

基　　金：中国石油化工集团有限公司合同项目(JKL21007)。

摘　　要：催化裂化提升管内良好的相间传热与传质、气-固流动特性可为催化裂化装置提供有利的反应环境。以某炼油厂1.80 Mt a催化裂化装置的提升管为模型,通过数值模拟方法研究了4种不同喷嘴布置对提升管内气-固流动特性及传热传质的影响。模拟结果显示:喷嘴数量为8、喷嘴倾角为30°的布置(布置B)下提升管内催化剂固含率分布和原料油的油气分布均优于其他布置;提升管内相间传热非常迅速,4种喷嘴布置下气-液-固三相温度场分布几乎一致,其中布置B下原料油雾滴分布相对较为均匀。通过对原料油雾滴蒸发情况进行评估,发现布置B具有最好的蒸发效果,有利于催化裂化反应的进行和改善产品分布。Good interphase heat and mass transfer and gas-solid flow characteristics in the catalytic cracking riser can provide a favorable reaction environment for the catalytic cracking unit.The effects of 4 different nozzle arrangements on gas-solid flow characteristics and heat and mass transfer in the riser of a 1.80 Mt a FCC unit were studied by numerical simulation.The simulation results showed that the distribution of solid holdup of catalyst and oil-gas in the riser of arrangement B with 8 nozzles and 30°nozzle inclination was better than other arrangements;the heat transfer between phases in the riser was very rapid,the temperature distribution of gas-liquid-solid three-phase was almost the same under 4 nozzle arrangements,and the distribution of feedstock oil droplets was relatively uniform in arrangement B.Through the evaluation of feedstock oil droplet evaporation,it is found that arrangement B has the best evaporation effect,which is beneficial to the FCC reaction and the improvement of product distribution.

关 键 词：催化裂化 提升管 喷嘴 气-固流动特性 传质传热 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]