Chemical Process Design

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2.- EQUIPMENT SIZING PROCEDURES Q, P maintenance ∆ Heat contents ∆ Composition Q, P streams setting Vessels V Heat transfer equipment: Heat exchangers Furnaces and Direct Fired Heaters Refrigeration Reactors Columns, distillation and Absorption Pumps, Compressors and Turbines Short-cut calculations for the main equipment sizing 5 P1 H1IN D1 CT C1 HX1 C1 8
SHORTCUTS for VESSEL SIZING (Flash drums, storage tanks, decanters and some reactors) 1) Select the V for liquid holdup; τ= 5 min + equal vapor volume V=(F L /ρ L * τ)*2 2) Select L=4D •Materials of Construction appropriate to use with the Guthrie´s factors and pressure (P rated =1.5 P actual ) • Basic Configuration for pressure vessels F V=πD 2 /4*L D=(V/π) 1/3 ; If D ≤1.2 m Vertical, else Horizontal V FV - Carbon steel vessel with 50 psig design P and average nozzles and manways - Vertical construction includes shell and two heads, the skirt, base rings and lugs, and possible tray supports. - Horizontal construction includes shell, two heads and two saddles MPF = Fm . Fp; Fm depending shell material configuration (clad or solid) FL V V2 9
Page 1 and 2: Chemical Process Design  Subj
Page 3 and 4: 1.- INTRODUCTION Process Alternativ
Page 5 and 6: Cost Estimation Method of Guthrie
Page 7: An example of Cost Estimation Equip
Page 11 and 12: SHORT CUT for REACTORS SIZING First
Page 13 and 14: Heat exchanger: Countercurrent, ste
Page 15 and 16: HEAT EXCHANGERS 15
Page 17 and 18: SHORT CUT for DISTILLATION COLUMS S
Page 19 and 20: DISTILLATION COLUMNS 19
Page 21 and 22: SHORT CUT for COMPRESSORS (or TURBI
Page 23 and 24: Centrifugal pumps selection guide.
Page 25 and 26: Guthrie Material and Pressure Facto
Page 27 and 28: 3.- COST ESTIMATION OF EQUIPMENT: B
Page 29 and 30: MF: Module Factor, affected by BC,

Chemical Process Design

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