Title: Control strategy for the Super Heat Integrated Distillation Column
Abstract: Distillation is the most widely used in the separation section of a process. It consumes an important amount of energy (close to 40% of the energy of chemical process). Many different configurations to increase its thermodynamic efficiency have been proposed. The first modification was to add side heat exchangers and reboilers to reduce the duties of condenser and reboilers then a pressurized rectifying section was proposed so that the heat duty of the side condenser could be supplied to the side reboiler. This is basically the concept of what is called Heat Integrated Distillation Column (HIDiC). Recently Toyo Engineering Corporation has patented a new HIDiC called SuperHIDIC column concept, where it realizes the heat integration concept in a simplified manner. Using this column energy conservation is around 50% and greenhouse gas emissions are significantly reduced. Objective is to develop a dynamic simulation of the column and to design the control structure. This will based on a methyl ethyl ketone separation column. First, we present the dynamic model, the designed column parameters and its performance in terms of energy consumption. After, we design and implement the control structure. This structure is evaluated under different production scenarios and disturbances and it is optimised for minimum total annual cost. This work shows the potential of heat integrated columns and specifically of the recently developed by Toyo Eng. Corp. A control structure that minimises costs (capex and opex) is proposed and analysed showing possible operation problems and how interactions between the different control loops affect the column performance.
Publication Year: 2018
Publication Date: 2018-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 1
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