Technical paper
Sour Water: Where it comes from and how to handle it
Sour water strippers are common in gas processing facilities, sulfur recovery units, wellhead facilities, and refinery applications. Understanding the variables allows engineers to better optimize the initial design and operation. This paper reviews options for sour water stripper configuration and presents a method to optimize stripper operation by finding the most efficient operating parameters. Options investigated include: single or double column for increased product purity; addition of acid or caustic for improved performance; refluxed or non-refluxed columns to mitigate water in the overhead gases; condenser or pump-around and their effects on overhead composition; reboiler, direct steam injection, or a combination of these and the effect they have on corrosion concerns. In addition, optimization of the steam rate is investigated. Overall stage efficiency for trayed strippers, HETP for packed strippers and individual component efficiencies are discussed based on available sour water stripper operating data.
Sour water strippers are common in gas processing facilities, sulfur recovery units, wellhead facilities, and refinery applications. Understanding the variables allows engineers to better optimize the initial design and operation. This paper reviews options for sour water stripper configuration and presents a method to optimize stripper operation by finding the most efficient operating parameters. Options investigated include: single or double column for increased product purity; addition of acid or caustic for improved performance; refluxed or non-refluxed columns to mitigate water in the overhead gases; condenser or pump-around and their effects on overhead composition; reboiler, direct steam injection, or a combination of these and the effect they have on corrosion concerns. In addition, optimization of the steam rate is investigated. Overall stage efficiency for trayed strippers, HETP for packed strippers and individual component efficiencies are discussed based on available sour water stripper operating data.