When should the compressor inlet flare be activated in the event of an accident in a catalytic cracking unit?
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In the catalytic cracking unit, the main fan was shut down for safety reasons due to issues such as excessive vibration. Before opening the flare at the compressor inlet in the reaction regeneration section to relieve pressure in the settler, what adjustments should be made first by the compressor operator? Based on my experience, one should wait until the outdoor operator shuts off the pressure compressor’s outlet to activate the stabilizing valve, and slightly open the compressor’s outlet for venting. Only after the indoor operator sets the compressor to its rated speed of 1500 RPM can the inlet valve be opened for venting. I’m not sure if this is correct or not Are there any other things I need to pay attention to? I would appreciate some guidance from the experts here
We have no particular requirements regarding the compressor; our priority is to keep the pressure in the settler under control, ensuring it doesn’t get too high or that there’s no pressure buildup. In case of an emergency, if the pressure in the settler rises beyond control, we will switch to using the flare system~~~~
The flare at the inlet of the compressor is used to prevent pressure buildup in the settler, thereby allowing for rapid pressure release. When the main fan stops, the inlet should be opened first to use the flare system and control the differential pressure between the two vessels. The compressor cut-off system maintains low-speed operation and operates in a closed-loop cycle while waiting for recovery.
As long as the reactor is under pressure, a flare must be used
It is absolutely clear that the compressor station must comply with the operational requirements of the settler in the reaction station. . . The pressure is extremely high; it’s necessary to introduce fire suppression agents at the inlet. Here, it’s under automatic control – the valves respond accordingly, and the operator can control them remotely from inside the room, without the need for manual intervention. . . The team leader is responsible for coordinating the interactions with the pneumatic press station. . . :lol
Can it be fixed right away? 1. No. Stop; continuing is a waste. It will recover soon. Keep it
The reaction pressure is extremely high; a flare is used at the inlet.
For the reaction system, it is necessary to strive for pressure balance to prevent an inversion of differential pressure that could lead to accidents. When the main air self-protection mode is activated, the compressor inlet will automatically vent to the flare. To stabilize the outlet of the pneumatic machine, keeping it open is a requirement for its safe operation, in order to prevent runaway motion.
After the main fan stops, it is necessary to promptly activate the flare valve at the compressor inlet to control the pressure; subsequently, the counterflow valve should be opened to reduce the outlet pressure and thus lower the speed and load for cyclic operation. The flare valve should be kept as closed as possible, depending on the pressure conditions. This post was last edited by luobinh on 2009-3-6 09:01]
In the event of an emergency during production and the plant is shut down urgently, the reaction unit can directly vent the material to prevent safety hazards, without having to wait for the compressor to make adjustments before venting it – as time does not allow it!
Setting up this process is to ensure that, in the event of an accident, the reaction pressure is maintained as the priority! Therefore, the reaction pressure should be used as the criterion for deciding whether to open the inlet flare valve, thereby ensuring the differential pressure between the two vessels!
If the compressor is functioning properly, it can continue to operate without interruption; efforts should be made to minimize the amount of excess gas that needs to be vented through flares (given the strict environmental regulations, it’s best not to use this method if there is no gas tank available). As long as the butterfly valve can be used for control, there is no need to vent gas through flares. If the inlet pressure is low, a pressure compensation line can be used to maintain the inlet pressure of the air compressor.
From a safety perspective, as long as the settler is under pressure, the flare must be activated immediately – safety comes first
When the main fan stops, it is necessary to relieve the pressure in the settler as quickly as possible; the compressor should be stopped as well, and the flare valve at the compressor’s inlet should be opened. If the compressor is not stopped, care must be taken to prevent surging when the flare valve is opened.
When the main fan stops, it is necessary to relieve the pressure in the settler as quickly as possible; the compressor should be stopped as well, and the flare valve at the compressor’s inlet should be opened. If the compressor is not stopped, care must be taken to prevent surging when the flare valve is opened.