Effect of the differential pressure between the regeneration reduction section and the reforming-reduction section
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In the IFP regeneration unit, to prevent the gas from Stage 1 from flowing upward into the reduction section, the differential pressure between the reduction section and Stage 1 is maintained at around 15 KPA； In the UOP regeneration unit, the differential pressure between the reduction section and Reactor 1 is normally controlled at around 100 KPA (with slight variations depending on the unit). If it is merely to prevent oil and gas from rising upward, can this differential pressure be reduced? What are the effects of lowering it? All marine enthusiasts are welcome to discuss and offer their advice.
We are using a UOP process; the current pressure is 115 KPa (within the range of 80–120 KPa). The interlock system activates when the pressure falls below 10 KPa or rises above 190 KPa, triggering actions such as introducing supplementary hydrogen and stopping the discharge of waste hydrogen. In my opinion, as long as the pressure remains within the specified interlock range, safety can be ensured; however, to avoid any abnormal fluctuations, it’s better to keep the pressure slightly higher. Since the reactor catalyst is filled to capacity, it should have little impact on the catalyst flow rate. I’m still a novice, so I’d like everyone to discuss other possible influences
If the differential pressure is not well controlled, the catalyst will experience fluidization and agitation in the reduction section, resulting in an increase in dust and affecting the proper operation of the regeneration process
I have a question: can either a high differential pressure or a low differential pressure cause agitation of the catalyst flow? Or?
A low differential pressure can cause fluidization, and a low level of material in the reduction section can also lead to localized fluidization; we generally control this differential pressure at 90 kPa
This pressure difference can actually be adjusted to control the pressure in the reduction section, that is, the pressure in the buffer zone when material is discharged from the lock hopper. When the feed flow rate changes, the pressure in the reduction section varies, which enables more stable control of the catalyst circulation rate; no adjustments are required for compensation control.