ABB designed software for its ACS800 drive so Curtis-Toledo could improve the operation of its rotary-screw compressors. The customized software can control the system pressure, air delivery, oil temperature and duty cycle directly from the drive.
Removing water or moisture from a liquid stream is a critical operation in many processes. Liquid stream dryers commonly contain either molecular sieves or adsorbents; during the last 20 years, the use of molecular sieves has become much more common.
Andrew Sloley, contributing editor, and Richard Readshaw, senior staff process engineer for VECO USA Inc.
Anywhere compressed air can be eliminated represents an opportunity to reduce system operating expenses. Often, this reduction means fewer compressors must operate to meet the plant's air requirements.
Christopher Schmidt, Mark D'Antonio and Alan MacDougall
Members of the chemical-processing industry address the question posed by a reader of Chemical Processing magazine: What is causing the valves to stick? Possible causes offered include undersize actuators and fluctuations in the plant air supply.