Abstract: A method for recovering sulfur from an acid gas feed is provided. The method comprising the steps of mixing the acid gas feed and an absorption process outlet stream to form a combined Claus feed, introducing the combined Claus feed and a sulfur dioxide enriched air feed to a Claus process to produce a Claus outlet gas stream, introducing the Claus outlet gas stream to a thermal oxidizer, treating the thermal oxidizer outlet stream in a gas treatment unit to produce a dehydrated stream, introducing the dehydrated stream to a membrane sweeping unit to produce a sweep membrane residue stream and a sulfur dioxide enriched air feed, introducing a sweep air stream to a permeate side of the membrane sweeping unit, and introducing the sweep membrane residue stream to a sulfur dioxide absorption process to produce the absorption process outlet stream and a stack feed.
Type:
Grant
Filed:
September 11, 2018
Date of Patent:
November 19, 2019
Assignee:
Saudi Arabian Oil Compnay
Inventors:
Jean-Pierre R. Ballaguet, Milind M. Vaidya, Iran D. Charry-Prada, Sebastien A. Duval, Feras Hamad, John P. O'Connell, Rashid M. Othman