Page 119 - Analysis, Synthesis and Design of Chemical Processes, Third Edition
P. 119
(3.6)
An illustration of a multiple-product process is given in Example 3.3.
Example 3.3
Consider three batch processes, producing products A, B, and C, as illustrated in Table E3.3. Each
process uses the four pieces of equipment in the same sequencing order but for different times.
Table E3.3 Equipment Times (in Hours) Needed to Produce A, B, and C
Market demand dictates that equal numbers of batches of the three products be produced over a prolonged
period of time.
Determine the total number of batches that can be produced in a production cycle equal to one month of
operation of the plant using separate campaigns for each product, assuming that a month of operation is
equivalent to 500 h (based on 1/12 of a 6000 h year for a three-shift plant operating five days per week).
Solution
The time to produce each product is given by Equation (3.2). Assume that each product is run x times
during the month:
