The timing at which the rich gas is fed into the compressor during catalytic oil injection.
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During catalytic fuel injection, should the rich gas be fed into the compressor first, or should it be fed in after the middle section has reached normal operation? Please explain why this is done?
Merge early, integrate in advance. The pneumatic compressor cycle is fine
Before fuel injection, the pneumatic pump is already cycling.
When injecting fuel into the riser, the top and middle sections have not yet been established; the compressor operates at low speed, with the anti-surge line at the outlet fully open up to the compressor inlet valve, in order to stabilize the circulation in the three towers. It takes some time to establish the intermediate stage; if the rich gas is not incorporated, the only option is to use a flare (which is not allowed here). The compressor cannot increase its speed, and the processing capacity cannot be raised either, which makes it difficult to establish the intermediate stage. In fact, as the pressure compressor speeds up, it is necessary to establish a mid-stage circulation as quickly as possible. Otherwise, how can the rich gas entering the absorption and stabilization system be desorbed, and how can the temperature at the bottom of the stabilization tower be controlled to keep the vapor pressure low? (Steam heat exchange is required at the bottoms of these two towers.) Also, it is important to prevent the stabilized gasoline from carrying large amounts of liquefied gas to the storage area; therefore, the liquid level in the absorption and stabilization system also needs to be kept at its lower limit, as long as circulation can take place.
How is it achieved without using a torch?