Sunday, October 4, 2020

Vessel Sizing

Vertical v/s Horizontal

Vertical: Minimization of layout area, greater selectivity in level control, high volume fraction of gas, small volume vessel

Horizontal: Low volume fraction of gas, long residence time for liquid, rapid variation in flowrate

Steps:  1. Calculate vessel diameter to satisfy separation and L/D, 2. Calculate T/T for surge/hold up


Target particle separation: Particle diameter is known. Typically know for typical services

Vertical vessel:

Determine vessel cross sectional area such that-

Allowable vertical velocity of vapor phase = Settling velocity of liquid particle * Margin

Margin: 0 to 1






Horizontal Vessel











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