Does rust have an impact on the desulfurization solvent (MDEA) used in sulfur recovery?
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This post was last edited by liaifeng on 2018-8-18 10:06. Does rust (an oxide of iron) have an impact on the desulfurization solvent (MDEA) used in sulfur recovery? Is chemical cleaning required for the solvent system before its first operation?
First, let’s talk about the impact of rust on the solvent: the content of thermally stable salts (HSS) is an important parameter in the analysis of solvents, as an increase in the level of these salts leads to a greater tendency for foaming in the solvent, which in turn increases the risk of solvent loss and flooding in the tower. The rust in the system then combines with the anions in the solvent to form thermally stable salts. Furthermore, regarding whether the solvent system needs to be chemically cleaned before the first operation: the first step before starting up for the first time is to thoroughly clean and displace the system using deionized water ； Then, following the recommendations of the solvent manufacturer, perform cyclic cleaning using a low-concentration solvent (5%) or an alkaline solution ；