Jet characteristics of nozzle of pipe grid gas distributor in FCC regenerator

被引：0
作者：
Shi R. [1 ]
Wang C. [1 ]
Ma L. [1 ]
Yan C. [1 ]
Wei Y. [1 ]
机构：
[1] State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing
来源：
Yan, Chaoyu (yanchaoyu@sina.com) | 2018年 / Materials China卷 / 69期
基金：
中国国家自然科学基金;
关键词：
Catalytic cracking; Gas distributor; Jet characteristics; Jet length; Nozzle;
D O I：
10.11949/j.issn.0438-1157.20170999
中图分类号：
学科分类号：
摘要：
In the catalytic cracking unit, the bottom of the regenerator is equipped with a pipe grid gas distributor. The gas is distributed into the regenerator bed through the nozzles on the distributor. In the actual operation, there will be problems of uneven distribution of gas and a serious erosion wear phenomenon in the distributor, and they have influences on the distribution effect and life of the distributors. The study on the jet characteristics of the nozzle was carried out in a two-dimensional bed experimental device. The solid material used in the experiment is FCC catalyst particles. In the experiment, the gas flow velocity through the nozzles ranged from 30 m•s-1 to 70 m•s-1, and the jet angle of the nozzles was in the range of 0°-67.5°. The jet length of the nozzles and the flow field of the bed near the nozzle were recorded by photogrammetry. The results show that the jet length increases with increasing the nozzle gas velocity and the nozzle angle. During the process when jet gas is turned upwards, swirl vortex appears in the upper part between the two branch pipes. The swirl vortex has a great relationship to the gas velocity and the jet angle. The size of the vortex is related to the size of the dilute phase space. Finally, based on the experimental data, a calculation model about the nozzle jet length was established. © All Right Reserved.
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页码：655 / 663
页数：8
相关论文
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