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A shortcut model in Aspen Plus is used to describe the crude oil distillation and the pinch analysis is adopted to identify the target of energy recovery.
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Rigorous simulations in HYSYS [AEA Technology, Hyprotech Ltd., Calgary, Canada, 2001] have shown good agreement with the shortcut model.
The optimization framework includes shortcut models developed for the simulation of the existing distillation column, and a retrofit shortcut model for the heat exchanger network.
This shortcut model can be used to simulate the composition and temperature of the reboiler, the top and other plates of the column in a batch extractive distillation operation.
This study makes use of a novel methodology for the synthesis of heat exchanger networks, which is aimed at overcoming the shortcomings associated with the use of shortcut models to represent individual exchangers in the synthesis network.
In particular, shortcut models for retrofit would be valuable for evaluating retrofit design options, for improving the performance of existing distillation systems (columns and heat recovery systems) and can be combined with detailed heat-integration models for optimizing existing heat-integrated distillation systems.
However, no shortcut models are available that address retrofit.
In this paper, we present a nonlinear programming approach to the conceptual design of integrated reaction-separation systems using shortcut models point of operation.
In the first design step, the optimal flowsheet structure of simple columns is identified using a superstructure formulation and shortcut models based on rigorous thermodynamics.
This paper presents retrofit shortcut models for design of both reboiled and steam-stripped distillation columns.
The shortcut models for different purification units are developed via the insights of the processes.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com