Page 284 - Chemical engineering design

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COSTING AND PROJECT EVALUATION
Table 6.2.
Constant
Size
Comment
Size
Index
Equipment Purchase cost of miscellaneous equipment, cost factors for use in equation 6.7. Cost basis mid 2004
unit, S range C,£ C,$ n
Agitators
Propeller driver 5 75 1200 1900 0.5
Turbine power, kW 1800 3000 0.5
Boilers
Packaged oil or gas fired
up to 10 bar kg/h steam 5 50 ð 10 3 70 120 0.8
10 to 60 bar 60 100 0.8
Centrifuges
Horizontal basket dia., m 0.5 1.0 35,000 58,000 1.3 carbon steel
Vertical basket 35,000 58,000 1.0 ð1.7 for ss
Compressors
Centrifugal driver 20 500 1160 1920 0.8 electric,
power, kW max. press.
Reciprocating 1600 2700 0.8 50 bar
Conveyors
Belt length, m 2 40
0.5 m wide 1200 1900 0.75
1.0 m wide 1800 2900 0.75
Crushers
Cone t/h 20 200 2300 3800 0.85
Pulverisers kg/h 2000 3400 0.35
Dryers
Rotary area, m 2 5 30 21,000 35,000 0.45 direct
Pan 2 10 4700 7700 0.35 gas fired
Evaporators
Vertical tube area, m 2 10 100 12,000 20,000 0.53 carbon steel
Falling film 6500 10,000 0.52
Filters
Plate and frame area, m 2 5 50 5400 8800 0.6 cast iron
Vacuum drum 1 10 21,000 34,000 0.6 carbon steel
Furnaces
Process
Cylindrical heat abs, kW 10 3 10 4 330 540 0.77 carbon steel
Box 10 3 10 5 340 560 0.77 ð2.0ss
Reactors
Jacketed, capacity, m 3 3 30 9300 15,000 0.40 carbon steel
agitated 18,500 31,000 0.45 glass lined
Tanks
Process capacity, m 3
vertical 1 50 1450 2400 0.6 atmos. press.
horizontal 10 100 1750 2900 0.6 carbon steel
Storage
floating roof 50 8000 2500 4350 0.55 ð2for
cone roof 50 8000 1400 2300 0.55 stainless

Table 6.3. Cost of column packing. Cost basis mid 2004
3
3
Cost £/m ($/m )
Size, mm 25 38 50
Saddles, stoneware 840 (1400) 620 (1020) 580 (960)
Pall rings, polypropylene 650 (1080) 400 (650) 250 (400)
Pall rings, stainless steel 1500 (2500) 1500 (2500) 830 (1360)