Abstract:

Distillation consumes one third of the total energy in industry.It has great potential for energy saving.Distillation energy-saving technology in internal thermally coupled distillation is the most promising, which can save more than 40% energy compared with traditional distillation process, but it has not been widely used.The bottleneck that prevents the process from being commercialized is the operational difficulties due to the nonlinearity, complex dynamics and interactive nature of the process.Based on an accurate second-order model, an internal model control (IMC) system for ITCDIC is presented and performance evaluation shows its effectiveness.It is more stable and reliable than PID.Also, compared with IMC reported, it has a wider range of operating field and more robust.