摘要
原油重质化劣质化趋势和产品质量升级导致加氢装置在炼厂中位置越来越重要。加氢裂化装置存在大量的控制变量和被控制变量,变量之间相互关联和干扰,传统的单变量控制系统采用"化整为零"的策略,应用于像加氢裂化装置这样的多变量耦合系统,控制性能较差,装置稳定运行困难。先进控制策略采用多变量模型预测控制的思想,将装置作为一个整体协调考虑各变量之间的关系,有效地克服了单变量控制系统的不足。论文在分析加氢裂化工艺的基础上,针对加氢裂化反应的特点,提出了先进控制目标,制定了控制策略,并应用Aspen公司开发的商业化先进控制软件DMC Plus构建了控制器。先进控制器投用效果表明加氢裂化反应单元所涉及的关键变量波动幅度大幅下降,说明装置稳定性得到显著提高,为进一步优化装置操作奠定了坚实基础,先进控制策略能有效改善加氢裂化装置操作水平。
The heavier crude oil is the more important hydro cracking unit is in the refinery.The upgrading of fuel oil criterion demands that hydro cracking units process the more crude oil.There are amount of variables which usually are coupling each other in the hydro cracking unit.The traditional control system independently controls the every variable.If the control system is used in the multivariable coupling units such as the hydro cracking unit,it is difficult for the unit operation to be stable.The multivariable model predictive control system is one kind of the advanced process control systems which control the unit as a whole.On the base of analyzing the characters of hydro cracking process,the controller targets and framework are provided in the paper.The controller is built in use of the software DMC Plus which is designed by Aspen Company.The results of controller application show that many key variables of hydro cracking unit fluctuation are more smoothly than before.The unit stability is apparently improved.Then it is impossible to further optimization the unit operation.So it is very useful that the advanced control strategy is applied in the hydro cracking unit.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2011年第5期628-630,共3页
Computers and Applied Chemistry
关键词
加氢裂化
先进控制
模型预测控制
hydro cracking unit
advanced process control
model predictive control
