Catalytic reforming IFP
Thread Content
There is a pressure difference between the pressure in the catalytic reforming IFP reformate separation tank and the pressure before the nitrogen compressor used for regenerating nitrogen. What is the purpose of this pressure difference? What should its value be, and what is it usually?
Control the total pressure difference between the regenerator and the high-pressure section by adding nitrogen or venting
Yeah, there are specific requirements regarding this pressure difference – what level is appropriate. We don’t use a pressure difference gauge for this; instead, we set a fixed pressure value. The inlet pressure of the nitrogen compressor is the same as the pressure in the reformate separation tank. If this differential pressure gauge is used and there are fluctuations in the reforming process, obvious large fluctuations will also occur here. Which option is better?
Control the fifth lift pressure difference; it is generally set at 120 KPa. If this value is too low, the seal for the fifth lift will always be at full capacity
This pressure difference mainly affects the lifting of the decanter at the top of the catalyst regenerator in the fourth reactor; either too high or too low is not good!
Another factor is the pressure difference between the four-counter lift mechanism and the lower hopper; under normal lifting conditions, the pressure in the lower hopper is about -5 kPa lower than that in the lift mechanism
The opening degree of this four-way sealed nitrogen valve here is consistently quite high, around 8.90, but the pressure difference between the lower hopper and the elevator is actually negative