Improving Overall Performance and Reducing Energy Usage in Refinery Amine Units with Minimal CAPEX

2013 SPE Kuwait Oil and Gas Show and Conference, 7-10 October 2013, Kuwait International Fair, Kuwait City, Kuwait
Improving Overall Performance and Reducing Energy Usage in Refinery Amine Units with Minimal CAPEX
Authors
Badar Al Saadi , Michelle Valenzuela, Jim Hill, Eldon Baumeister; Dow Oil and Gas Business Unit of The Dow Chemical Company
Abstract
Describes the use of simulation techniques, key performance indicators, ideal solvent selection, routine solvent analysis for optimal hygiene, and system performance to increase acid gas removal capacity while maintaining environmental compliance. Authors also present real field experience and lessons learned from the implementation of these practices.
Introduction
With the trend towards heavier and higher sulfur containing crudes, refineries are increasing processing capabilities which can include capital-intensive projects and additional energy consumption. In order to meet stringent regulations for ultralow sulfur fuels in the global market, refineries must increase processing capabilities to accommodate a heavier, sour crude slate. This includes upgrading hydro treating capacity to address the additional sulfur load and adding acid gas removal systems to treat the resulting H2S.
Capacity upgrades have become a challenge for refineries already struggling with tightening margins. Thus, solutions to boost capacity should focus on minimal capital expenditures. Specific to gas treating systems, there are two ways to increase the treatment capacity and optimize energy consumption. Both require minimal capital investment. The first method involves upgrading the chemistry of the solvent to increase capacity and reduce required processing energy (i.e. reboiler duties). The second method requires an understanding of the system performance. With the use of mass and energy balances, a plan is developed to optimize appropriate operating conditions and key performance indicators to increase the treating capacity, while maintaining environmental performance.
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