REGENERATION TYPE DESULFURIZATION APPARATUS AND DESULFURIZATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To suppress the lowering of heat efficiency involved in the use of a gas for regeneration by applying a dry type desulfurization method to a desulfurization system removing hydrogen sulfide and carbonyl sulfide from the produced gas in a gasification system using a hydrocarbon as a raw material. SOLUTION: Two or more dehydrating towers for absorbing water in a produced gas produced by gasification of a hydrocarbon and two or more desulfurization towers for absorbing a sulfur compound in the downstream of each dehydrating tower are installed so as to change over absorption and regeneration. A zeolite having high selectivity of water absorption is packed in each dehydrating tower, and a zeolite having high selectivity of absorption of hydrogen sulfide and carbonyl sulfide is packed in each desulfurization tower. After water in the produced gas is removed, the produced gas is passed through the desulfurization tower. A gas for regeneration is passed through the dehydrating tower at the time of regeneration to absorb water and the gas for regeneration containing water is used for regeneration of an absorbent packed in the desulfurization tower. The amount of regeneration gas used is reduced thereby. COPYRIGHT: (C)2009,JPO&INPIT