摘要
针对一套200万t/a重油催化裂化装置催化剂循环管线流化的异常问题,运用立管和斜管内催化剂输送的流体力学理论,分析了原装置催化剂循环管线上松动点的布置情况,指出了其不合理布置是导致该装置催化剂循环管线流化出现异常问题的根本原因,对此提出了详细的松动点核算和改进方案。改造后装置的运行结果表明,装置的催化剂循环管线流化稳定,催化剂密度和滑阀压降分布合理,反应温度的波动范围可控制在±1.5℃,解决了装置催化剂流化异常问题,提高了装置的生产运行水平。
The abnormal fluidization problem in catalyst circulation pipe of a 200×104t/a fluidized catalytic cracking(FCC) plant was analyzed on the basis of the fluid mechanics theory of catalysts conveying in standpipe and sloping pipe,and it was pointed out that the incorrect distribution of aeration orifice in catalyst circulation pipe was the underlying reason resulting in the abnormal fluidization problem.Then,the detailed layout calculation and revampment programs on the distribution of aeration orifice were p...
出处
《石化技术与应用》
CAS
2008年第1期49-54,共6页
Petrochemical Technology & Application
基金
国家自然科学基金资助项目--化工过程中的时空多尺度结构及其效应(项目编号:20490200)
关键词
催化裂化
流化
催化剂循环管线
松动点
fluidized catalytic cracking
fluidization
catalyst circulation pipe
aeration orifice
