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Optimization with Integrated Offline Parametric Optimization of Detailed Process Model of an Interceptor Unit for Water Network Synthesis and Retrofit Design

Ismail, Norafidah (2010) Optimization with Integrated Offline Parametric Optimization of Detailed Process Model of an Interceptor Unit for Water Network Synthesis and Retrofit Design. Universiti Teknologi PETRONAS. (Unpublished)

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Abstract

Petroleum refineries is a prime example of industrial plants that demand high quantities of water for process consumption and generate volumes of highly contaminated industrial eflluents and wastewaters. Scarcity of freshwater resources and increasingly stringent environmental regulations on industrial effluents have motivated refineries to develop water reuse technologies for sustainability of plant operations. The technology concept can be characterized into three (3) strategies: reuse, regeneration, and recycle (W3R). The major contribution of this work is to consider the design of alternative refinery water network structures that incorporate the detailed design of wastewater treatment technology (or interceptor) in an optimization-based modeling framework as an offline parameter optimization problem. For this purpose, a source-interceptor -sink superstructure representation is adopted that embeds many feasibly possible alternative water network configurations. A mixed-integer nonlinear programming (MINLP) optimization model is formulated based on the superstructure with the objective of minimizing freshwater import, wastewater generation, piping interconnections, and the total cost of installing and operating the treatment technology. The parametric optimization problem comprising of material balances and the detailed phenomena model for interceptor, specifically for a single-stage hollow fiber reverse osmosis (HFRO) membrane module, is incorporated in the overall MINLP framework. The modeling approach is developed in conjunction with its implementation into general algebraic modeling system (GAMS), using data of a real operating refinery situation. The model is solved iteratively by branch and reduce optimization navigator (BARON), resulting in freshwater consumption requirements to be 296.2 m3 /h at the optimal refinery water network structure and operating conditions, which accounts for nearly 61% of water recovery compared to current operating requirements (before the integration and retrofit initiatives based on W3R).

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Process System Engineering
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 29 Oct 2013 10:53
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/10082

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