Process integration course (sink&source digram)

3.1 Consider a process with six sinks and five sources (Sorin and Bedard 1999). The process data are given in Tables 3-7 and 3-8. Fresh water is used in the sinks and it is desired to replace as much fresh water as possible using direct-recycle of process sources. Determine the target for minimum usage of fresh water and waste discharge after direct-recycle. How many material recycle pinch points are there? What is their significance? TABLE 3-7 SINK INFORMATION FOR PROBLEM 3.1 (SORIN AND BEDARD 1999) Sink Flow Maximum Inlet Load (tonnes/h) Concentration (ppm) (kg/h) 1 120 0 0 2 80 50 4 3 80 50 4 4 140 140 19.6 5 80 170 13.6 195 240 46.8 6 TABLE 3-8 SOURCE INFORMATION FOR PROBLEM 3.1 (SORIN AND BEDARD 1999) Sources Flow Concentration Load (tonnes/h) (ppm) (kg/h) 1 120 100 12 2 80 140 11.2 3 140 180 25.2 4 80 18.4 5 195 48.75 230 250