Olefin producer uses shed decks to improve quench tower operations

Three intercooler water quench towers in the cracked gas compressor train of the Carmel Olefins Ltd., Haifa, Israel, plant had poor heat transfer. Temperature approaches between the quench water and overhead gas ranged from 6° C. to 12° C.A major engineering contractor, in a debottleneck study, recommended replacing the sheds with packing to improve heat transfer and reduce the temperature approaches. Concerns about packing and distributor plugging by polymers, possible reflux flashing, high gas inlet velocities, and possible liquid-phase separation in the distributors provided incentives for avoiding packings.When correctly designed and widely spaced, shed decks will surpass, or ...

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