Method to retrofit system with enhanced capacity for removing mercury from a produced hydrocarbon fluid.

Abstract

A method for retrofitting a system for removing mercury and water from a gas stream is disclosed. A system is provided including a first water removal unit and a second mercury removal unit in fluid communication with the first water removal unit. The first water removal unit has a fixed capacity or reservoir for containing mole sieves for removing water from a gas stream. The second mercury removal unit has a fixed capacity or reservoir for containing mole sieves for removing mercury from the gas stream. The second mercury removal unit is filled with mole sieves adapted for removing mercury from a gas stream containing mercury. The first water removal unit is retrofit by replacing a first portion of mole sieves adapted for removing water from the gas stream with a second portion of mole sieves adapted for removing mercury. The capacity of the system for removing mercury is thereby enhanced relative to a system of the same size wherein the first water removal unit is filled with water removing mole sieves and no mercury removing mole sieves.

Dependencies are inferred from the claim text.