I would like to ask everyone about accident incidents related to control valve failures

Problems with the control valve can cause issues in production; if detected in time, it can be addressed

This post was last edited by jackie.yan on 2017-10-12 at 10:32. Are there any accident cases where problems occurred but were not detected in time, or were not addressed promptly, resulting in an accident? A few words will do too

Then it is very likely to lead to an accident

There are many such problems during the production process. For example, the compressor unit stops operating due to a valve failure, and the reflux interruption occurs as a result of a fault in the emergency shut-off valve of the distillation column’s reflux tank.

Put simply, in automatic control systems, the on-site monitoring instruments act as the eyes, the DCS serves as the brain, and the on-site control valves function as the hands and other execution mechanisms. Any problem with any of these components can lead to fluctuations in the production process, or even cause production accidents or safety incidents. I work in the polypropylene industry, and there was once an incident where the fuse of the control valve for propylene feed to the reactor burned out, resulting in a disruption in the supply of propylene raw material; this led to an emergency shutdown of the reactor, and there was a near-miss of polymerization explosion. I heard that a friend whose facility deals with ethylene oxide experienced a failure in the oxygen feed valve, which caused large fluctuations in the oxygen flow rate. As a result, the reaction tower had to be shut down urgently, and large amounts of ethylene oxide were released into the atmosphere; any slight carelessness could lead to an explosion.