Cascade sieve tray for extraction and deasphalting

Details Cascade sieve tray for extraction and deasphalting Cascade sieve tray for extraction and deasphalting

1984-01-13

1986-05-13

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Physical type apparatus

Means separating or dissolving a material constituent

196 1452, 2105321, 210538, B01D 1104, C01C 308

Patent

active

045885630

ABSTRACT:
A liquid-liquid contacting apparatus of the type having at least two vertically spaced apart sieve tray assemblies includes vertical weirs between groups of sieve holes (preferably rows) in the sieve tray and, for each sieve tray located with the apparatus, a sloped collector-coalescer plate which provides a coalescence surface for dispersed phase droplets and directs the dispersed phase to the rows of sieve holes on the sieve trays. Additionally, the collector-coalescer plate prevents the dispersed phase droplets from impacting directly on the sieve holes where new drops of dispersed phase are being formed. This arrangement of sieve holes, weirs and collector-coalescer plate provides for steady controlled flow of dispersed phase throughout the apparatus over an exceptionally wide flow range and within a narrow, efficient fluid flow velocity through the sieve holes, e.g., a velocity of from about 0.6 to about 1.0 ft/sec.

REFERENCES:
patent: 2153507 (1939-04-01), Hann
patent: 2768071 (1956-10-01), Pokorny et al.
patent: 2777758 (1957-01-01), Pokorny et al.
patent: 3632315 (1972-01-01), Vitti et al.
patent: 3899299 (1975-08-01), Bushnell et al.
patent: 4336106 (1982-06-01), Winter
patent: 4426361 (1984-01-01), Bushnell
patent: 4511537 (1985-04-01), Fiocco et al.

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