Question: Analysis of the reasons for the automatic shutdown of a reciprocating hydrogen compressor
Thread Content
I would like to ask everyone: apart from process interlocks, instrument-based interlocks related to lubricating oil pressure, as well as electrical interlocks related to motor stator temperature, motor bearing temperature, and main bearing temperature, what other factors can cause a reciprocating hydrogen compressor to stop operating suddenly? Is it possible that some of the circuits for electricity and instrumentation are improperly connected?
…………This issue needs to be analyzed in detail, right... Do you often stop for no apparent reason? ? Generally, when a compressor shuts down abnormally, it will send a interlock signal to the DCS or ESD system, and the records can be retrieved! ! As for the issue with the instrument signal connections, this should have been checked before starting work! ! ! As for virtual signal connections, it involves knowledge related to DCS systems, which I’m not very familiar with. However, if there are unused signal terminals, they should be protected, as otherwise it could lead to the generation of incorrect signals.
Oh, right. For compressors, in addition to the interlock conditions you mentioned, there is also an interlock related to compressor vibration; if the bearing vibration is too severe, it can cause the machine to shut down! Moreover, ESD protection is usually built into such systems, allowing for the retrieval of relevant records
If a shutdown is caused by the unit’s own protection system, it is generally recorded in the ESD system. If no records are shown for any shutdown events of the ESD systems, yet the unit shuts down, it must be due to an issue with the electrical system (as faults in the electrical system generally do not leave any records in the unit’s protection system).
False alarm interlock of instrument signals is a common phenomenon that causes automatic shutdown. For example, we often encounter situations where false readings from temperature sensors cause the vehicle to stop.