Regarding the standby units, how have you configured the interface between the unit’s own interlocks and the process interlocks?
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This post was last edited by 328104062 on 2016-3-21 at 19:56. As the title suggests: Hydrogenation or reinstallation units (of course, in the case of a centrifugal reforming unit, there may be no backup cycle hydrogen compressor). Imported units and pumps have numerous interlocks; once these interlocks are triggered, the process stops. So what is the interface between the unit’s interlocks and the process? Since there is one operating unit and one standby unit, any action taken by the standby unit can lead to a shutdown of the process. How do people avoid this situation? What measures are taken in terms of design and management to prevent process shutdowns when switching between units? Manager Discussion Group
Any action by the standby unit will also cause a shutdown of the process
The specific process requirements are not very clear； I’ll just talk about the similar approaches to interlock design used in our company, in the hope it will be helpful to you: For the one-in-use and one-backup configuration, there are many situations in our company; for example, with regard to backup storage tanks (only one can be used at a time), we use bottom control valves to make the selection ； Whether in automatic or manual mode ； Only one valve can be opened ； If you open one valve, another valve closes automatically ； If in cases where two devices can be used simultaneously at a time ； For example, with backup pumps, only one is used under normal circumstances ； Our program is configured to monitor selection and operation signals for interlock purposes ； If the program is in progress, the following condition must be met: the pump must be set to the program monitoring mode ； (Only one monitoring status can be selected), and the selected monitoring device must be running ； At this time, regardless of whether the backup pump is running or not ； However, as long as the monitoring device is not running, it is automatically assumed that the device has failed and stopped ；