METHOD FOR RETROFITTING AN EXISTING SYSTEM FOR REMOVING MERCURY AND WATER FROM A HYDROCARBON FLUID IN ORDER TO ENHANCE ITS MERCURY REMOVAL CAPACITY

摘要

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 having 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 filled with a first portion of mole sieves adapted for removing water from the gas stream and a second portion of mole sieves adapted for removing mercury. The capacity of the system for removing mercury is 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.