Operational issues during regenerator desulfurization
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In our system, oxygen-enriched regeneration is carried out in a pre-burning tank; when the material is unloaded from the bottom of the burning tank, the external circulation slide valve is closed. How can this be explained? ? ? Because as the deslagging process progresses, the amount of material stored in the coking tank decreases; therefore, the external circulation slide valve should be opened to maintain an adequate level of storage in that tank. Why is it being closed instead?
In automatic mode, the external circulation slide valve controls the volume stored in the two-phase region (i.e., the regenerator); when material is discharged, the total storage volume decreases, and accordingly the volume stored in the coking zone also decreases； If you want to keep the amount of burnt canned food unchanged, then it is necessary to reduce the amount of two-phase canned food; the set value for this amount can be decreased accordingly.
If we want to reduce the amount of two-phase slurry, we should open the external circulation slide valve wider, but in reality it is closed narrower. What is the reason for this?
This can be considered from the driving force of the external circulation circuit. If the volume of the two-phase reserve in the regenerator remains unchanged and the volume of the single-phase reserve decreases, the driving force increases. With the valve position remaining constant, the volume of the two-phase reserve will shift toward the single-phase phase; during operation, the external circulation slide valve will be appropriately reduced until a new equilibrium is reached. Other influencing factors include changes in the main air volume and regeneration pressure.
Is it a concern that wind might blow in through the external circulation pipe?
You should first figure out what the external circulation line is used for Now you know why the external circulation slide valve has been reduced in size. Hehe
Original poster, the external circulation control is related to the amount of the two-phase slurry stored, that is, the amount stored in the regenerator. If the set value for this amount of two-phase slurry remains unchanged during the unloading process, the total amount of slurry stored will decrease after unloading, and this does not refer solely to a decrease in the amount stored in the coking tank. Therefore, as the amount of the two secret stores decreases while the given value remains unchanged, the external circulation slide valve should be closed more. I’m not sure if you can understand it with this explanation. Chengkang is absolutely right; please take that into consideration.
Thank you so much; the explanation was very clear
When shutting down, it can be switched to manual control~~~
OP, I wanted to ask if the density of the tank decreases significantly when you remove the agent? What is the density under normal conditions?