Distillation: processes – separatory – Vaporization zone under positive pressure or vacuum
Patent
1986-06-06
1987-10-06
Chiesa, Richard L.
Distillation: processes, separatory
Vaporization zone under positive pressure or vacuum
202158, 203 94, 2611142, B01D 310
Patent
active
046981381
ABSTRACT:
An improved method and apparatus for de-entraining liquid droplets from a vaporous stream as it leaves a flash zone of a separation tower. The removal of the droplets is accomplished by a chimney which directs vapor flow through two direction changes of about 180.degree. each. The chimney comprises a riser and hat which have an annulus between them. The cross-sectional area of the annulus is less than that of the cross-sectional area of the riser, so the momentum imparted to the entrained droplets drives them downwardly while the lighter vapor undergoes the second direction change and continues upwardly. The chimney may further reduce entrainment by having an extended portion of the riser below a plate and a lip attached to the inside perimeter of an opening of the riser above the tray. Preferably a lower portion of the riser has a larger cross-sectional area than an upper portion of the riser.
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Chiesa Richard L.
Gilman Michael G.
Keen Malcolm D.
McKillop Alexander J.
Mobil Oil Corporation
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