PROCESS FOR PURIFYING HIGH-TEMPERATURE PRODUCING GASES AND COMPOSITE POWER PLANT WITH COAL GASIFICATION

摘要

High temperature reducing gas to a catalytic CO-shift reaction in a reactor having a corresponding catalyst and equipped with a heat recovery means for controlling the reaction gas temperature while injecting steam into said high temperature reducing gas, in order to convert the content of CO in the high temperature reducing gas into CO2 ; and effecting the removal of the sulfur compounds and of CO2 by dry adsorption of them on adsorbent under control of the temperature of the gas by means of the heat recovery means of the reactor and separating the sulfur compounds from CO2. Optionally, the sulfur compounds separated from CO2 are supplied to a Claus process sulfur recovery unit to convert H2S in the sulfur compounds into elementary sulfur to recover it. The composite power plant with coal gasification comprises : a CO-shift reactor (5) for converting CO in the purified product gas (4) into CO2 disposed between the gas purifier (2) and the burner of the gas turbine power generation unit ; a means (10) for removing CO2 and sulfur compounds (11) from the product gas (9) in dry system ; and a sulfur compound separator (13) separating sulfur compounds (15) from the gas left (12) after the removal of CO2 and sulfur compounds.