Heat integration distillation column

Nakaiwa M et al. Potential energy saving in an ideal heat-integrated distillation column. Appl Thermal Eng 1998 18 1077-1087. 

While these techniques have been applied to energy-related processes such as heat-integrated distillation columns and fluid catalytic cracking reactors, there is still extensive research required before the concept of plant design/control is reduced to practice. 

CGCC can indicate if a reduction in reflux is possible (Fig. 11.12). At minimum reflux the Pinch touches the vertical axis. Obviously, both reboiler and condenser duties are reduced in the same proportion. Note that the reduction in reflux might be justified from a stand-alone operation point of view, but not necessarily when the integration with other units is considered, such as in the case of the heat integrated distillation columns (see later in this chapter). 

Similarly with the recycle of mass, the recycle of energy can induce non-linear phenomena that affect the whole plant. Practical solutions can be obtained by examining these aspects at the level of sub-systems. The next sections present two examples of practical significance heat integrated reactors and heat integrated distillation columns. 

Buckley, P. S., "Control of Heat-Integrated Distillation Columns , in T.F. Edgar (ed.) Chemical Process Control 2 Proceedings of the Engineering Foundation Conference, The American Institute of Chemical Engineers, New York, 1982, p. 347. 

Consider internally/externally heat integrated distillation columns and/or low energy separation processes such as membrane distillation... 

Three component parts were given by Weitz (1994) for the FS configuration of the heat-integrated distillation columns in Figure 20.2. His linearized models are, for the high-pressure column... 

Shenvi AA, Herron DM, Agrawal R. Energy efficiency Umitations of the conventional heat integrated distillation column (HIDiC) configuration for binary distillation. Ind Eng Chem Res 2010 50(l) 119-30. 

Cheng, H.C., Luyben, W., 1985, Heat-integrated distillation columns for ternary separations, Ind. Eng. Chem. Process Des. Dev., 24,707-713. 

Figure 1 Flow sheet of the heat integrated distillation column.

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