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After replacement of Platformer Catalyst at our CCR-Platforming Unit, pressure of platformer feed at inlet of Packinox Combined Feed Exchanger increased from 6.0 kg/cm2 to 11 kg/cm2 within 2 months that is major constraint of 100% platformer load due to 100% opening of feed control valve & unit load is limited to 90%.
Recycle gas pressure is 5.3 kg/cm2 which is normal. It looks that there is plugging in spray bars due to migration of high dust of catalyst after start up.
Have anyone experience to solve this type of problem without shut down of platformer unit by changing some parameters like H2/HC ratio, plat unit load etc.We have maintained H/HC ration at 2.5 mole/mole.
 
Answers
09/11/2012 A: Farid Q Q, Indian oil corporation Ltd, faridulqadar@gmail.com
Bypass the feed from the Platformer Reactor for 2 hours and keep running the RGC at 100% load. Open the HC feed filter drain to CBD upstream of the combined feed exchanger so that your gas back flushes the spray bar and monitor the PDI across it ( it will definitely drop ). After 2 hours u can cut in feed and resume normal operation.
22/06/2012 A: Mike Watson, Tube Tech International Ltd, mike.watson@tubetech.com
Tube Tech International have the widest range of cleaning technologies globally available and can assist in cleaning the spray bars. In fact we specialise in cleaning CCR Platformer (Texas Towers) worldwide as well as the most difficult cleaning problems worldwide.
21/06/2012 A: Ralph Ragsdale, Ragsdale Refining Courses, ralph.ragsdale@att.net
You are on the right track. As you know, a lower H2/HC ratio can be offset by a higher reactor inlet temperature, and the penalties are a reduced run length and more light ends produced, but usually increased revenue with the increased feedrate.