Experts in catalytic cracking, if the steam compressor stops suddenly during production, what is the best course of action on the reaction side?
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How does the main operator carry out the reaction?
Controlling the reaction pressure can be done by using a flare at the inlet of the pneumatic compressor. To reduce losses, the reaction volume can be appropriately reduced, and waiting for the compressor to start up will allow operations to resume. If it cannot be started within a short time due to a machine failure, follow the dispatcher’s instructions as to whether to cut off the feed or continue operating at a reduced capacity.
After the compressor stops, the gas is sent to the flare. The reaction system should have its throughput reduced or be shut down as appropriate. I completely agree with what was said on the 2nd floor.
At the compressor inlet, vent the rich gas; reduce the reaction rate or stop feeding material, and close the outlet to stabilize the situation. The safety valve used for venting at the outlet should be set to the bypass mode – there is still suction at this point, so increase the venting rate! If a turbine drives the compressor, be sure to pay attention to the medium-pressure LS pressure to prevent the safety valve from activating! And pay attention to the liquid level in the flare tank! !
The handling of the reaction unit is basically as mentioned above; the key is to strictly control and maintain stable pressure. Currently, **environmental regulations are extremely strict; it is not feasible to release large amounts of flue gas. It is necessary to reduce the volume or stop the flow of gas as appropriate, and to recover the flue gas that is released.
In the event of a sudden stop of the compressor, the operator on duty must promptly open the flare valve and close the backflow valve to prevent excessive pressure from causing an accident. At the same time, measures to reduce temperature and precipitation are taken to maintain production. The air compressor had the cause identified, was repaired promptly, operations were restarted, and production was resumed. If recovery is not possible in a short time, the reaction is treated by cutting off the material.
I’ve looked at several people’s solutions and learned how to address this issue; thank you all.
The answers given by those upstairs are all correct. At this point, regarding the reaction process, it is most important to control the pressure properly and reduce the volume of material used in a timely manner; at the same time, attention must also be paid to the operation of the smoke extractor as well as issues related to heat extraction.
A flare is installed at the compressor inlet to control the reaction pressure, by reducing the reaction volume or shutting off the feed.
The answer on the 2nd floor is completely correct. Regularly strengthen the maintenance of the flare valve to ensure it is ready for use at any time. If anti-backlash is in use, it must be turned off.
In the event of a sudden stop of the compressor, the operator on duty should promptly open the flare valve to prevent excessive pressure buildup, maintain proper pressure balance among the three vessels, ensure normal fluidization within them, and avoid accidents. Reduce the unit’s processing capacity simultaneously to maintain production. If pressure balance is disrupted and fluidization stops, treat it as an emergency shutdown.