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Title: Troubleshooting Glycol Dehydrators
Author: J. L. Daughtry
Source: 1981 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1981
Abstract: The production of natural gas in the United States has reached a level of approximately 20 trillion standard cubic feet per year. When natural gas is brought to the earths surface, it contains water, acid gases (hydrogen sulfide or carbon dioxide or both) and other contaminants which must be removed before the gas can be used for either industrial or domestic applications. Removal of water from natural gas is accomplished by using expansion refrigeration, dry desiccants, liquid desiccants, or calcium chloride. The purpose of this paper is to discuss problems associated with glycol dehydration and remedies for correcting these problems. Foaming, contamination, and corrosion are three of the more common problem areas which result in glycol losses and gas being out of compliance with pipeline specifications. Troubleshooting a glycol dehydrator primarily involves analyzing the glycol solution and observing changes in the plant operation. The conclusions of these investigations show for the most part that foaming can be corrected by scrubbing the inlet gas, using a flash tank, filtering the glycol solution, and using antifoam agents. Most contaminants can be prevented by installation of an inlet scrubber, side stream reclaimer, and charcoal filter.

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