| 摘要 |
<p>Processes for the thermal reduction of sulfur dioxide to elemental sulfur are described and disclosed. The processes described include three general reaction sections, including the reaction furnace portion where the S02-containing stream is combusted, the second reaction zone where the temperature is moderated to encourage the reaction of sulfur with hydrogen to consume the hydrogen carbon monoxide and produce the H2S and CO with allowing adequate residence time. The temperature moderation is achieved by one or combinations of three different methods including adding external waste heat boiler, using inter-stage internal cooling coil or adding a quench fluid. The third reaction zone is a Claus conversion portion, wherein residual H2S and S02 are further reacted to produce additional elemental sulfur in one or more reactors containing Claus type catalyst or combination of them.</p> |
