Page 50 - Applied Process Design for Chemical and Petrochemical Plants Volume I

Applied Process Design for Chemical and Petrochemical Plants

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

Type ofEquipment *Design ""Comfiuter Checking Total M-H Type @Equipment *Design **Computer OChecking Total M-H
HEAT EXCHANGERS: DISTILLATION (TRAY):
Solvent cooler ......................... 30 3 Organic-tray-by-tray ..... 25 75 (12)
Tank heating coil .................... 4 2 Organic-tray-by-tray ..... 64 104 (12)
Caustic cross exchanger ......... 32 6 Deme thanizer-tray-by-tray ... .3 1 22 53 (15)
Caustic cooler .......................... 8 2 Organic-tray-by-tray .............. 35 4 46 (7)
Oil cross exchanger ................ 32 5 Organic-tray-by-tray .............. 10 5 15 (5)
Gas cooler ................................ 8 4 Organic-tray-by-tray .............. 5 3 11 (6)
Compressor gas Organic-tray-by-tray .............. 2 2 4 (2)
1 De-ethanizer ............................ 24 15 39 (12)
8 Demethanizer .......................... 30 15 45 (15)
4 Organic-includes tray
Gas cooler ...................... 1 28 52 (15)
CONDENSERS: 10 48 (20)
Steam .............. -
2 PUMPS
11 System ..................
2
Finishing .................................. 4 1.5
Single ...................
PARTIAL CONDENSERS:
Organic-air ........................... 10 2 RECIPROCATING COMPRESSOR
Organic-air ........................... 20 4 BHP, temperature and ........... 3 - 3
Organic-air ........................... 30 14 Data for vendor rating ............ 6 2 8
Inorganic-air ......................... 50 20
CENTRIFUGAL COMPRESSOR About the same as
Reciprocating above.
-
5 PROCESS LINE SIZES:
- 0.5 1.5 (0.5)
5 0.5 1 (0.5)
6 9 29 (3)
2
5 6.5 (3)
- SAFETY VALVES:
- Single ............... ..... 2 - 2 4
- Single ....................................... 1 - 1 2
1
1 STEAM TRAPS:
............ 3 - 1 4
REBOILERS (FORCED CIRCULATION): 0.25 1
Organic-steam ...................... 25 (4) 10 Single ....................................... 1 - 1 2
Organic-steam ...................... 19 (4) 8
Organic-steam ...................... 6 (1) 3 MISCELLANEOUS TANKS, DRUMS, ETC.:
1
Organic-steam ...................... 6 (2) 3 Condensate level drum .......... 0.5 - 0.5 9
-
Steam flash drum ....................
6
3
DISTILLATION (PACKED): Storage tank ............................ 2 - - 2
Carbonating tower .................. 25 (4) 10.5
Gas cooler ................................ 20 (4) 8 MATERIAL BALANCES
Gas cooler ................................ 25 (6) 7 Depends on size of system.
Cooling .................................... 16 (5) 22
Gas scrubber ........................... 24 (6) 4 Note: The man-hours listed in this table included collection of needed
...................... 12 (6) 8 physical and other data and preparation of a specification or summary
Vent eas 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.
Checking only for "Design" calculations.
( )Alternate calculations by programmed computer.