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 CHARACTERISTICS AND HEAT AND MASS TRANSFER INSIDE THE RISER
王松江 1崔凌云 1李国智 1刘璐1
作者信息
- 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
- 折叠
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.
Abstract
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Key words
catalytic cracking/riser/nozzle/gas-solid flow characteristics/heat and mass transfer引用本文复制引用
基金项目
中国石油化工集团有限公司合同项目(JKL21007)
出版年
2024
NETL
NSTL
万方数据