Page 258 - 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 235

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FIGURE 10.19 GCC for the process in Problem 5.

(a) Extract the appropriate stream data for performing a Pinch
Analysis. Tabulate the extracted data where appropriate. If a
stream involves phase changes (several segments), then give
the relevant details (e.g., stream F1 has three segments:
liquid phase, vaporization, and vapor phase).
(b) In the base-case design, what is the hot and cold utility
consumption and how much is the process heat recovery?
Compare the utility usage in the base case with the targets
shown on the CCs. Why are they different?
(c) Explain how the heat recovery system can be improved over
the base case without modifying any conditions (e.g., reactor
pressure, column pressure) of the main process.
(d) Refer to the GCC in Figure 10.19.

(1) If a heat pump is proposed, what operating temperature
levels will best fit the heating and cooling needs of the
process?
(2) What qualitative suggestions can be made concerning
alternatives for utility saving and appropriate utility
placement?
(e) If process modifications are allowed, comment on whether
they could help to improve the process Heat Integration.
Your answer should address the reactors, the distillation
columns, feed vaporization, and soft data.
For this problem, the following assumptions are made. Utilities
generated can be sold, and the unit cost of high-temperature utilities