How to handle a cutting feed accident?
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If the device suddenly loses high-voltage power and the feed is cut off, should the flare valve still be opened?
Emergency plan for large-scale power outages in refining facilities http://bbs.hcbbs.com/viewthread.php?tid=370254&highlight=%CD%A3%B5%E7%B4%A6%C0%ED
In most current units, the large flare valves automatically open after the compressor stops operating, to prevent overpressure； The unit suddenly loses high-voltage power; the main fan and air compressor stop operating. The unit’s emergency protection system is activated, and the large flare is automatically opened, with its operation adjusted according to the reaction pressure ； For torches that do not have self-protection functions, the opening degree of the main vent can be adjusted according to the reaction pressure to ensure that overpressure is not incurred.
It’s specified in the operating procedures: the size of the flare valve should be adjusted according to the reaction pressure. Generally, rapid pressure relief is required, and we open the valve wide to achieve this quickly
What device? Catalysis? Catalysis is carried out according to actual conditions; generally, the pressure in the settler can be controlled, and a flare is used when necessary
For catalytic units, the decision should be based on the reaction pressure. Generally, small valves are used for fine tuning; in the event of an emergency during production, large valves are employed for venting to prevent a positive pressure difference between the two vessels, which could lead to another accident.
The size and speed of the switch should be determined based on the reaction pressure