Is your antifoam compatible with the amine system?
Several options help minimize operation costs and mitigate unscheduled shutdowns
The specific behavior of antifoam use was studied in a particular plant. The goal was to find a solution for applying the new antifoam for the best compatibility with amine systems. A gas sweetening unit was installed to remove hydrogen sulfide (H2S) contained in a high-pressure (HP) natural gas stream. The solvent used for the H2S removal from the gaseous stream was a 34 wt% diethanolamine (DEA) solution, and the designed plant treating capacity was 250 million standard cubic feet per day (MMscfd) of HP sour gas. Due to bad filtration and an improper antifoam selection, an upset occurred that created foaming at the contactor tower. Six months after the unit startup, the deferential pressure of the lean/rich (L/R) exchanger was increased to 4 bar (allowed limitation was 0.7 bar). An unplanned shutdown of the sweetening plant occurred since cleaning was needed for the L/R amine heat exchangers. It took maintenance 12 hours to do the turnaround.
To continue reading please, log in to hydrocarbonprocessing.com.
Subscribe now for premium access and unlimited access to the site, including archived articles and the process handbooks. Start a free trial to gain access to articles from the current issue of Hydrocarbon Processing.
Already have an account?
Subscribe today and gain unlimited and immediate access to the site. Plus, you'll receive the next 12 issues of the magazine in your choice of print or digital format. Start your subscription today.
Start a free trial and gain immediate access to the current issue of the magazine plus additional, select content.
30 Day Trial