Desulfurization of flue gas from an amine process

摘要

A method for disposing of excess sulfur dioxide in a flue gas from thermal oxidation of an acid gas stream including hydrogen sulfide recovered from a rich amine solution of an amine plant servicing at least one well head, includes cooling the flue gas to about 300 to about 650 degrees Fahrenheit, injecting a dry sorbent into the flue gas after the step of cooling the flue gas, reacting the dry sorbent after the step of injection, with the sulfur dioxide of the flue gas for sufficient time for formation of reaction byproduct and treated gas, and separating the reaction byproduct from the treated gas. Examples of the dry sorbent include calcium hydroxide, sodium bicarbonate, and trona, as well as magnesium hydroxide and sodium carbonate, and combinations.