Page 227 - Plant design and economics for chemical engineers

198 PLANT DESIGN AND ECONOMICS FOR CHEMICAL ENGINEERS

TABLE21
Typical labor requirements for process equipment

Workers/
unit/
Type of equipment shift

Dryer, rotary
Dryer, spray
Dryer, tray
Centrifugal separator
Crystallizer, mechanical
Filter, vacuum
Evaporator
Reactor, batch
Reactor, continuous
Steam plant (100,000 lb/h)

I..,.
, ,,.,,,
/I - Multiple small units for increasing copocity.
or completely botch operotion
B - Averoge conditions
C - Large equipment highly outomoted. or fluid
processing only
I I llllIll I I I lllil i

1 0
1 2 3 4 5 6 8 1 0 2
Plant capacity. tons of product/day
FIGURE 6-8
Operating labor requirements for chemical process industries.