How does one measure how much dispersion steam to inject, relative to the feed?
Answers
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14/01/2017
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A:
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Saleh Daryabari, Senior Process Engineer of RCD and RFCC, Arak Refinery, daryabari@gmail.com
Generally feed dispersion steam rate is about 1 wt% of feed. Lower feed preheat temperature and higher feed viscosity require an increase in dispersion steam.
For optimization increase or decrease dispersion steam by 0.2 wt% and wait for 12 hours, then calculate new yield and material balance. Based on results, increase or decrease feed steam rate for further optimization step.
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04/01/2017
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A:
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Eric Hennings, Technip Stone & Webster, EHennings@technip.com
Steam requirement for feed atomization will be a function of the proprietary injector design. In general, more steam is required for heavier resid feedstocks.
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