EXAMPLE #2 FLASH DRUM PROBLEM: Design a flash drum that is To flash a stream that is 60 mol% ethylene and 40 mol% water at a flow rate of 800 kmovhr, o To produce a vapor that is 99% ethylene 9 At a fractional recovery ofethylene of% The flash drum is a vertical pressure with an L/D=4.0 OPERATING CONSTRAINTS Low entrainment of water in the vapor o 10 minute holdup of liquid when drum is 1/2 full 8/24/99 Equipment desi8/24/99 Equipment Design 8 EXAMPLE #2: FLASH DRUM PROBLEM: Design a flash drum that is u To flash a stream that is 60 mol% ethylene and 40 mol% water at a flow rate of 800 kmol/hr, u To produce a vapor that is 99% ethylene u At a fractional recovery of ethylene of 99 % u The flash drum is a vertical pressure with an L/D = 4.0. OPERATING CONSTRAINTS: u Low entrainment of water in the vapor u 10 minute holdup of liquid when drum is 1/2 full