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51316-7586-Corrosion Risks in Tail Gas Lines Going To Sulfur Recovery Unit Incinerators

Picture for Corrosion Risks in Tail Gas Lines Going To Sulfur Recovery Unit Incinerators
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Product Number: 51316-7586-SG
ISBN: 7586 2016 CP
Author: Cathleen Shargay
Publication Date: 2016
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$20.00
$20.00
In Sulfur Recovery Units (SRU) the piping transporting various tail gas streams to the incinerator can experience severe corrosion and plugging due to the condensation of sulfur water and/or sulfuric acid. Case histories of these problems have occurred even in lines with properly-designed steam tracing systems. This paper will discuss the impacts of different feed gas combinations on the risk of plugging and corrosion in steam traced areas and refractory-lined sections; recommendations for design details of the piping systems; vertical vs. horizontal incinerator inlets and the locations of possible corrosion. A key lesson learned was that to avoid corrosion unit operators need a good understanding of which tail gas streams can and cannot be combined. Avoiding corrosion is even more critical in today’s ultra-large units which can have tail gas lines as large as 84-in diameter as the economic impacts of process losses and maintenance costs are also amplified.
In Sulfur Recovery Units (SRU) the piping transporting various tail gas streams to the incinerator can experience severe corrosion and plugging due to the condensation of sulfur water and/or sulfuric acid. Case histories of these problems have occurred even in lines with properly-designed steam tracing systems. This paper will discuss the impacts of different feed gas combinations on the risk of plugging and corrosion in steam traced areas and refractory-lined sections; recommendations for design details of the piping systems; vertical vs. horizontal incinerator inlets and the locations of possible corrosion. A key lesson learned was that to avoid corrosion unit operators need a good understanding of which tail gas streams can and cannot be combined. Avoiding corrosion is even more critical in today’s ultra-large units which can have tail gas lines as large as 84-in diameter as the economic impacts of process losses and maintenance costs are also amplified.
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