What are the most important aspects taken in to consideration when designing a feed injection system for a FCC reactor?
Answers
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02/08/2010
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Virendra Kapoor, Petroleum Refining Consultants, vkkapoor9@yahoo.com
Physical properties of Feed e.g. surface tension, viscosity etc, feed injection velocity in riser, proper atomization having almost uniform distribution with correct mean Sauter dia. of droplets, spray pattern, very fast vaporization, orientation of nozzles, dispersion steam, orifices sizes and their pattern, minimized backmixing
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30/07/2010
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keith bowers, B and B Consulting, kebowers47@gmail.com
License the design from a Technology Licensor. KBR for instance performed numerous 'drop size' and 'penetration depth' and dispersion TESTS on alternate designs that had been developed for a lot of CFD based design and analysis. It IS NOT a trivial undertaking and intuition leads to far from ideal performance.
Proper feed injection nozzle design and operation can increase profitability by $Millions a year.
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30/07/2010
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Bob Kalaria, KBR, bhavdip.kalaria@kbr.com
Efficient feed vaporization is the most important aspect to consider while designing a feed injection system. If feed does not vaporize completely, it may lead to coking and other operating difficulties. A good feed nozzle design and sufficient feed preheat temperature should be able to accomplish this task.
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30/07/2010
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Ralph Ragsdale, Ragsdale Refining Courses, ralph.ragsdale@att.net
Here are a few non-proprietary descriptions:
- configuration of riser below the injection points
- angle/slope of riser wall at the elevation of the injection points
- angle of the injection nozzles relative to the riser wall
- arrangement and number of injection nozzles
- adequate atomization within the injection nozzle design
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