Page 132 - Analysis, Synthesis and Design of Chemical Processes, Third Edition

t = (30)(10) = 300 h
C
V = (35,000)(0.006103)(10)/(300) = 7.12 m 3
C
Total time for production cycle = 500 h

Volume of reactor
3
= 7.37 m (limiting condition for Product B)

= (7.37)(264.2) =1947 gallons

The closest standard size, 2,000 gallons, is chosen.

3.7 Summary

In this chapter, concepts important to the design of batch processes were introduced. Gantt charts were
used to illustrate the timing and movement of product streams through batch processes. The concepts of
nonoverlapping and overlapping sequences were discussed for single-product and multiproduct
processes. The differences between flowshop (multipurpose) and jobshop (multiproduct) plants were
introduced, and the strategies for developing single-product and multiproduct campaigns for each type of
process were discussed. The role of intermediate and final product storage and the methods to estimate
the minimum product storage for single-product campaigns were illustrated. The addition of parallel
equipment was shown to reduce product cycle time. Finally, an example of estimating the size of vessels
required in a multiproduct process was given.

References

1. Sundaram, S., and L. B. Evans, “Shortcut Procedure for Simulating Batch Distillation
Operations,” Ind. & Eng. Chem. Res. 32 (1993): 511–518.

2. Seader, J. D., and E. J. Henley, Separation Processes Principles (New York: John Wiley
& Sons, 1998).

3. Dewar, J. D., “If You Don’t Know Where You’re Going, How Will You Know When You
Get There?” CHEMTECH 19, no. 4 (1989): 214–217.

4. Biegler, L. T., I. E. Grossman, and A. W. Westerberg, Systematic Methods of Chemical
Process Design (Upper Saddle River, NJ: Prentice-Hall, 1997).

Short Answer Questions

1. What is a flowshop plant?

2. What is a jobshop plant?