The power was cut during operation; what should be done first at the device site?
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I wonder if anyone has ever encountered a situation where the device loses power while it is in operation. What actions should be taken first at the scene when the device loses power?
The facility has lost power; DCS, SIS, and UPS provide emergency power supply. But can the positioners and solenoids of the instrument control valves on site still be powered? Simply pressing the emergency stop button is definitely not enough
Handle it in accordance with the emergency shutdown plan
In such a situation, the only things that come to mind are releasing pressure from the system (and if it involves control valves, those should also not function; in that case, manual pressure release at the site is necessary) and isolating the system from the surrounding systems；
First, shut down system security. Then, it is necessary to pay attention to changes in factors such as the pressure at the site and the liquid level, and make corresponding adjustments based on those conditions.
During operation, the device lost power; undoubtedly, the vaporization furnace shut down automatically, with a chain reaction that triggered shutdown without even the need to press the emergency stop button. After the vehicle is jumped out of, it is up to the personnel on site to handle the situation; first and foremost, it is necessary to maintain pressure in the vaporization furnace and prevent pressure interference. In other words, all devices must first stop consuming power and producing output, after which on-site personnel gradually bring them back online while keeping the system shut down.
Let me share my thoughts as well; in the event of such an unexpected accident, everyone needs to know their role and be clear about what to do. First, the DCS operator quickly terminates various exothermic reactions to prevent a rapid rise in pressure and temperature, and swiftly isolates the inlet and outlet valves. Always ensure that all process parameters are within normal ranges. The on-duty electrician should ensure that the backup emergency power supply can start up and switch over properly, so as to maintain normal UPS power supply. All positions need to be well-trained on a regular basis; in particular, management staff must ensure this is done and keep proper records for inspection!
Let me share my thoughts as well; in the event of such an unexpected accident, everyone needs to know their role and be clear about what to do. First, the DCS operator quickly terminates various exothermic reactions to prevent a rapid rise in pressure and temperature, and swiftly isolates the inlet and outlet valves. Always ensure that all process parameters are within normal ranges. The on-duty electrician should ensure that the backup emergency power supply can start up and switch over properly, so as to maintain normal UPS power supply. All positions need to be well-trained on a regular basis; in particular, management staff must ensure this is done and keep proper records for inspection!
Maintain heat and pressure immediately; shut off the water outlet from the cyclone in the gasification furnace as well as that from the water washing tower. Close the main valve for oxygen supply to that section. Check on-site whether all pumps are operating in reverse to prevent high pressure from leaking into the low-pressure system, and close the inlet and outlet valves of the burners