Column process design specifies the separation, and sets column pressure, reflux, stages, and feed point. These in turn yield internal flows and reboiler and condenser duties. This chapter addresses the main column process design considerations. The column is optimized during the process design, and many times later during operation. Computer control continuously optimizes the column on-line. Both design and on-line optimization are also addressed in this chapter.
Column process design proceeds stepwise. The shortcut step eliminates the least-desirable options and provides a starting point for the rigorous step. The rigorous step fine-tunes the design and completes the column optimization. This chapter addresses the shortcut step. Graphical shortcut techniques were covered in the previous chapter. Rigorous simulation is addressed in detail in the next chapter.
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