Patent ID: 8679448
Filing Date: 2014-03-25
Classification: B01D,C01B

Abstract:
1. A method of handling vent gases from liquid sulfur, comprising: receiving in a rundown pit liquid sulfur from a Claus unit while separately feeding a tail gas from the Claus unit to a tail gas unit, and providing a nitrogen stream or inert sweep gas from a sweep gas unit at a first pressure to ahead space in the rundown pit, thereby forming an acid gas containing sweep gas; conveying a portion of the liquid sulfur from the rundown pit to a degassing unit, and using a purge gas at a second pressure in the degassing unit to degas the liquid sulfur, thereby forming a degassed liquid sulfur product and an acid gas containing purge gas; feeding the acid gas-containing sweep gas to at least one component of the tail gas unit that is fluidly coupled to the Claus unit, wherein the component is selected from the group consisting of a reducing gas generator, a heater, and a hydrogenator; and feeding the acid gas-containing purge gas to the main bunter or reactor furnace of the Claus unit.