Abstract
Distillation is the most extensively used in separation process of the chemical industry. Relationships between non-linear variables, multivariable interactions, dynamic system properties, and other irregularities render the study of design simulation and process optimization an interesting challenge for process engineers. The objective of the process optimization is to produce the most economical to conduct the system. This paper discusses the process engineering strategy started from the determination method of the degree of freedom, design variables, process tools, economic parameters, and the optimization process. The distillation variable optimized in this study was limited to reflux ratio. The optimum variable was construed from the reflux ratio producing the lowest total annual cost (TAC). Furthermore, it was analyzed the energy cost as optimization parameter in the total annual cost (TAC) calculation method to obtain minimum reflux ratio in distillation unit.
Highlights
1.1 BackgroundDistillation plays a substantial contribution towards a chemical factory
The distillation columns are employed in many separation process of the chemical industry [3], whereby control is needed to obtain products with a specified purity at minimum cost
This is by all means very difficult to achieve due to the presence of process irregularities, multivariable interactions, dynamic system properties and microscopic disturbances in the distillation column [4]
Summary
Distillation plays a substantial contribution towards a chemical factory. Distillation is a very common method of separation employed in the chemical industry and presents complex process in its modelling and control [1, 2]. The distillation columns are employed in many separation process of the chemical industry [3], whereby control is needed to obtain products with a specified purity at minimum cost. This is by all means very difficult to achieve due to the presence of process irregularities, multivariable interactions, dynamic system properties and microscopic disturbances in the distillation column [4]. The operating conditions of a petroleum refinery column have been optimized by using a tool to minimize energy consumption [8] This simulation result at a later stage was successfully applied to the pilot plant unit [8]. The stages of this simulation are include the illustration of processes, analysis of degree of freedom and design variables, compilation of calculation algorithms, modelling, and simulations using MATLAB, Ms Excel, and Polymath software to discern the optimum reflux ratio value
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