Complimentary Webinars

Through June 30, AIChE members will receive complimentary, unlimited access to live and on-demand AIChE webinars by purchasing them with their newly increased number of credits. See more resources.

Improving the Control of Process Flows

Source: AIChE
  • Type:
    Conference Presentation
  • Conference Type:
    Southwest Process Technology Conference
  • Presentation Date:
    October 10, 2014
  • Duration:
    30 minutes
  • Skill Level:
  • PDHs:

Share This Post:

This presentation will introduce an unusual flow control algorithm that out-performs the PID algorithm when used for flow control.  The algorithm was formulated as the result of an intensive study that was conducted on many sets of instantaneous flow measurements, from flows either on set-point flow control using the PID algorithm or on “manual”.  The study revealed some unexpected characteristics of turbulent flow.

Use of this algorithm on each of four (4) hypochlorinators gave control of the mass flows of gaseous propylene (125,000 #/day) to each of the towers to within ¼% of set-point on a continuous basis (24/7).  This precision was proven by both oxidation potential (OP) cells and gas chromatographs analyzing for propylene in the vents of the hypochlorinators.  The ¼% precision was achieved with regular off-the-shelf control valves and positioners.  The algorithm is simple.  Its best feature is that it requires no factors and no tuning.

Once the content has been viewed and you have attested to it, you will be able to download and print a certificate for PDH credits. If you have already viewed this content, please click here to login.



Do you already own this?



AIChE Member Credits 0.5
AIChE Members $15.00
AIChE Graduate Student Members Free
AIChE Undergraduate Student Members Free
Non-Members $25.00