Method for purifying high-temperature reducing gas

摘要

Disclosed are, in a method for purifying a high-temperature reducing gas in which sulfur compounds present in a high-temperature reducing gas are absorbed and removed by an absorbent according to a dry method, a method for purifying a high-temperature reducing gas which is characterized in that a reducing gas is supplied into a gas containing sulfur dioxide gas which is discharged from a regeneration system for regenerating the absorbent which system forms a system together with an absorption system in which the sulfur compounds are absorbed with the absorbent, a resulting gas mixture is led through a reactor filled with a catalyst, the sulfur dioxide gas and the reducing gas are let react with each other under pressurization so that elemental sulfur is directly produced and recovered as liquid sulfur; and the above method which is further characterized in that catalyst layers in the reactor in which the sulfur dioxide gas and the reducing gas react with each other are divided into parts or made to have a plurality of stages, a heat exchanger and a sulfur condenser are disposed between these parts or stages, and the temperature control of these gases and the removal of sulfur produced in the reaction are carried out during the reaction.