Page 53 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

38 Applied Process Design for Chemical and Petrochemical Plants

Table 1-9
Estimated Man-Hours Required for Equipment Design [7] (updated)

Type of Equipment ¥Design **Computer rlChecking Total M-H Type of Equipment "Design **Computer °Checking TotaliW-H
-----�
HEAT EXCHANGERS: DISTILLATION (TRAY):
Solvent cooler 30 3 33 Organic-tray-by-tray .............. 50 (12) 25 75 (12)
Tank heating coil 4 2 6 Organic-tray-by-tray .............. 40 (12) 64 104 (12)
Caustic cross exchanger 32 (]) 6 38 Dernethanizcr-c-tray-by-tray .... 31 (15) 22 53 (15)
Caustic cooler 8 (2) 2 10 (2) Organic-tray-by-tray .............. 35 (7) 4 46 (7)
Oil cross exchanger 32 (3) 5 37 (3) Organic-tray-by-tray .............. 10 (5) 5 15 (5)
Gas cooler 8 (3) 4 12 (3) Organic-tray-by-tray .............. 5 (6) 3 II (6)
Compressor gas Organic-e-tray-by-tray .............. 2 (2) 2 4 (2)
afrercooler 8 (2) I 9 (2) De-ethanizer ............................ 24 (12) 15 39 (12)
Slurry cooler 32 (4) 8 40 (4) Dcmethanizer .......................... 30 (15) 15 45 (15)
Finned tube exchanger 15 4 19 Organic-includes tray
Gas cooler 4 (]) I 5 (1) layout ................................... 24 (15) 28 52 (15)
Organic-includes tray
CONDENSERS: layout ................................... 38 (20) 10 48 (20)
Steam 7 (2) 7 (2)
Organic 6 (2) 2 8 (2) PUMPS
HCI organic 10 (5) 11 21 (5) System ······································ 8 (2) 6 14 (2)
Organic 6 (2) 2 8 (2) Single ....................................... 1.5 (2) 0.5 2 (2)
Finishing 4 (1.5) 1.5 5.5 (1.5) Single ....................................... 1 (1) I 2 ( I)
Single ······································· 3 (I) 3 6 (I)
PARTIAL CONDENSERS:
Organic-air 10 (3) 2 12 (3) RECIPROCATING COMPRESSOR:
Organic-air 20 (3) 4 24 (3) BHP, temperature and ........... 3 3
Organic;---air_ �O ( 4) 14 44 (4) Data for vendor rating ............ 6 2 8
Inorganic=-air aO (4) 20 70 (4) CENTRIFUGAL COMPRESSOR: About the same as
REBOILERS (THERMOSIPHON): Reciprocating above.
Organic-steam 16 16 PROCESS LINE SIZES:
Organic-steam 20 (3) 25 (3) Single (0.5) 0.5 1.5 (0.5)
Organic-steam 14 (3) 14 (3) Single 0.5 (0.5) 0.5 I (0.5)
Organic-steam 10 (3) 5 15 (3) System, 22 lines 20 (3) 9 29 (3)
Organic-steam 16 (3) 6 22 (3) Air header for plant .4.5 (3) 2 6.5 (3)
Organic-steam 14 (3) 5 24 (3)
Orgauic-steam 4 (0.5) 4.5 (0.5) SAFETY VALVES:
Organic-steam 5 (1) 6 (1) Single 2 2 4
Orgauic-steam 4 (1) 5 (1) Single 1 I 2
Organic-steam 5 (0.5) 6 (0.5)
Organic-steam 5 (O . .'>) 6 (0.5) STEAM TRAPS:
System of 4 3 1 4
REBOILERS (FORCED CIRCULATION): Single 0.75 0.25 1
Organic-steam 25 ( 4) 10 35 (4) Single 1 1 2
Organic-steam 19 (4) 8 27 (4)
Organic-steam 6 (1) 3 9 (1) MISCELLAi'<EOUS TANKS, DRUMS, ETC.:
Organic-steam 6 (2) 3 9 (2) Condensate level drum 0.5 0.5 I
Steam flash drum 6 3 9
DISTILLATION (PACKED): Storage Lank 2 2
Carbonating tower 25 ( 4) 10.5 35.5 (4)
Gas cooler 20 ( 4) 8 28 (4) MATERIAL BALANCES:
Gas cooler 25 (6) 7 32 (6) Depends on size of system.
Cooling 16 (5) 22 38 (5)
Gas scrubber 24 (6) 4 28 (6) Note: The man-hours listed in this table included collection of needed
Gas scrubber 12 (6) 8 20 (6) physical and other data and preparation of a specification or summary
Vent gas scrubber 5 (2) 1.5 6.5 (2) of the requirements.
*Using desk electronic calculators, not programmed.
**Programmed computer. Represents data input plus calculation time, sometimes multiple.
CJ Checking only for "Design" calculations.
( )Alternate calculations by programmed computer.