Electric motors in continuous or near-continuous service have high energy costs, even at the relatively low electric rates common in much of the chemical industry. Don't squander savings opportunities when considering motor replacement
Critical evaluation can enable you to turn up capacity and improve performance. This article presents some ideas to help you evaluate your process to see whether it offers exceptional revamp opportunities.
For the most part, industry and government have worked well together to develop and implement assessments and tightened security measures. Late last year, however, a pair of situations arose that underscore some procedural differences between the two
Install a flow meter in the recycle, cascade the flow set point with a pressure control loop. With proper tuning, the valve characteristics are lost in the flow control loop, which should be tuned fast with PI.