October 2004

Special Report: Improving Process Control

Model-free adaptive technology improves distillation column chain control

It enabled PetroChina to increase production safety and efficiency

Cheng, G. S., CyboSoft; Zhang, W. D., PetroChina

Distillation columns are the most widely used operating units in the chemical industry (Fig. 1). Energy consumed by distillation columns contributes to more than 50% of plant operating costs. It is desirable to tightly control the bottom and tray temperatures to optimize separation, avoid flooding, minimize steam consumption and maximize yield. This multiphase and multivariable process is so complex that control of its temperature, pressure and level loop can be difficult. Model-free adaptive (MFA) control technology improved distillation column control at this PetroChina plant.  Fig. 1  

Log in to view this article.

Not Yet A Subscriber? Here are Your Options.

1) Start a FREE TRIAL SUBSCRIPTION and gain access to all articles in the current issue of Hydrocarbon Processing magazine.

2) SUBSCRIBE to Hydrocarbon Processing magazine in print or digital format and gain ACCESS to the current issue as well as to 3 articles from the HP archives per month. $409 for an annual subscription*.

3) Start a FULL ACCESS PLAN SUBSCRIPTION and regain ACCESS to this article, the current issue, all past issues in the HP Archive, the HP Process Handbooks, HP Market Data, and more. $1,995 for an annual subscription.  For information about group rates or multi-year terms, contact email Peter Ramsay or call +44 20 3409 2240*.

*Access will be granted the next business day.

Related Articles

From the Archive



{{ error }}
{{ comment.comment.Name }} • {{ comment.timeAgo }}
{{ comment.comment.Text }}