| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide dry-gas purification equipment capable of preventing impurity eliminators and carbon from precipitating in a pipe or the like, and of purifying a coal gasification gas in a dry process, and to provide a coal gasification-combined electric power plant provided with the dry-gas purification equipment. <P>SOLUTION: Steam is added to the pipe 21 for feeding the coal gasification gas generated in a coal gasification furnace to the desulfurizer 6. In a desulfurizer 6, carbon is prevented from precipitating on the surface of piping or a desulfurization agent by adding the steam to the coal gasification gas. More specifically by addition of steam, (1) an aqueous shift reaction is promoted; (2) a CO<SB POS="POST">2</SB>mole fraction x<SB POS="POST">CO2</SB>increases; (3) the Boudouard reaction being a reaction of carbon monoxide to carbon dioxide is inhibited by the increase of the mole fraction x<SB POS="POST">CO2</SB>; and (4) thereby, the precipitation of carbon is inhibited. <P>COPYRIGHT: (C)2012,JPO&INPIT |
