Investigating the performance of dehydration unit with Coldfinger technology in gas processing plant

Natural Gas is usually saturated with water which must be removed in order to protect the gas system from corrosion and hydrate formation. TEG dehydrators are the most common equipment to remove water from produced gas. TEG regeneration by Coldfinger technology has been recognized as one of the promising processes for dehydrating natural gas. In this work the dehydration unit of the domestic gas processing plant was simulated in the presence of a Coldfinger system. The lack of a Coldfinger unit in steady state simulation software makes simulation difficult, so, first the Coldfinger was modeled. The predicted results for Coldfinger were compared with plant data. There was a good consistency between them. Then the proposed model was added in the steady state simulation software. Finally, the result of simulation was used to investigate the influence of flow rate and temperature of stripping gas and pressure of Coldfinger, on regeneration rate. This research resulted in beneficial information about the performance of the Coldfinger technology.

► The dehydration unit of domestic refinery was simulated.
► The Coldfinger technology is used in dehydration unit.
► The Coldfinger is modeled for solving the simulation problems.
► The influences of several parameters on regeneration rate were investigated.