| 摘要 |
<p>The invention relates to a method for the treatment of raw product gas produced by pressure gasification of solid fuels. After cooling to 15 to 45°C, the following substances are removed by physisorption with cold oxygenate: in a preliminary stage, HCN and NH; in a first stage, HS and COS and, if necessary, other sulfurous compounds; and in a second stage CO. The pure product gas is then conveyed as a reduction gas and/or as a combustion gas to the direct reduction of iron ore. An improvement to the method lies in the fact that the desulfurized product gas is mixed with return gas loaded with COand water vapor diverted from the circulation of the return gas from the direct reduction of iron ore, once the water vapor contained therein has been removed.</p> |
