| 摘要 |
PURPOSE:To purify the titled gas efficiently, by removing sulfides from a high- temperature reducing gas with an adsorbent, introducing an O2-containing regenerating gas to the adsorbent and making the sulfides flow as SO2 and converting the SO2 with an SO2 reducing catalyst set at the rear flow side of the adsorbent. CONSTITUTION:Coal 1 and oxygen 2 are fed to a gasifying furnace 3 to give crude gas 4, from which dust is removed by a dust collector 5 to give a high- temperature reducing gas 6. The gas is passed through an adsorption reactors 17-19 packed with an adsorbent to adsorb sulfides and then an oxygen- containing regenerating gas 40 is introduced to the adsorbent 20 and a sulfurous acid-containing gas is made to flow. Then, the flow gas and the high- temperature reducing gas flowing from the adsorbent 20 are fed to reactors 24-26 packed with a sulfurous acid reducing catalyst set at the rear flow side of the adsorbent 20, the sulfurous acid gas in the flow gas is converted into sulfur of single substance, a gas flowing from the reducing catalyst 27 is fed to a separator 38, sulfur of single substance is separated, the residual gas 39 is recycled as part of the regenerating gas for the adsorbent. |
