Page 274 - Sustainability in the Process Industry Integration and Optimization

E x a m p l e s a n d Ca s e S t u d i e s 251

Flowrate 90 t/h 45.7 t/h 0 t/h
required for the F.W. 100 ppm 800 ppm
interval
20 t/h 1

100 t/h 2
Limiting 50 ppm
Flowrates
40 t/h 3 3
50 ppm
10 t/h 4
400 ppm
Wastewater (90-90) (90-45.7) (45.7-0)
0 t/h 44.3 t/h 45.7 t/h
100 ppm 800 ppm

Water mains
FIGURE 10.35 Design grid for the water system in Problem 9.

90 t/h 45.7 t/h 0 t/h
F.W. 100 ppm 800 ppm
20 t/h 1 20 t/h
50 t/h
100 t/h 2

20 t/h 40 t/h
40 t/h 3
20 t/h
5.7 t/h
10 t/h 4
0 t/h 44.3 t/h 45.7 t/h

FIGURE 10.36 Streams are connected with the water mains (Problem 9).