A method and apparatus including a reaction chamber interposed in a polyvalent metal redox solution flow path between an absorber chamber and an oxygenation chamber, including one or more oxygenation stages, for contact in the reaction chamber of H₂S-laden catalytic polyvalent metal redox solution form the absorber chamber with highly oxidized polyvalent metal redox solution from the last oxygenation stage to accomplish oxidation of the dissolved H₂S species by interaction with the oxidized redox catalyst essentially in the absence of gaseous dissolved oxygen. The highly oxidized polyvalent metal redox solution, including Fe⁺³ or V⁺⁵, contacts the H₂S-laden solution from the absorber chamber for reoxidation of the dissolved HS⁻, S= and any of the polyvalent metal sulfur compounds (presumably a chelated iron sulfide or a vanadium sulfide), to avoid formation of sulfate or thiosulfate salts which reduce the yield of sulfur and build up in the solution. To avoid the formation of crystals of iron sulfide or crystals of vanadium sulfide, thereby avoiding loss of polyvalent metal, the residence time of the redox solution after contact with the H₂S-containing gas and prior to contacting with the oxidized metal redox soluton is limited to a relatively short time. Flow of solution from the last oxygenation stage, preferably through a valve or other circulation control device, to the reaction chamber provides controlled and continuous elemental sulfur formation in the reaction chamber.
一种方法和装置,包括在吸收室和充氧室之间的多价
金属氧化还原溶液流路中插入一个反应室,该反应室包括一个或多个充氧阶段,用于在反应室中将吸收室中含有H₂S的催化多价
金属氧化还原溶液与来自最后一个充氧阶段的高度氧化多价
金属氧化还原溶液接触,以在基本上没有气态溶解氧的情况下通过与氧化氧化还原催化剂的相互作用完成溶解的H₂S物种的氧化。高度氧化的多价
金属氧化还原溶液(包括 Fe⁺³ 或 V⁺⁵)与来自吸收室的含 H₂S 溶液接触,对溶解的 HS-、S= 和任何多价
金属
硫化合物(可能是螯合
硫化铁或
硫化钒)进行氧化还原,以避免形成
硫酸盐或
硫代
硫酸盐,从而降低
硫的产率并在溶液中积聚。为了避免
硫化铁或
硫化钒晶体的形成,从而避免多价
金属的损失,氧化还原溶液在与含 H₂S 气体接触后和与
氧化金属氧化还原溶液接触前的停留时间应限制在相对较短的时间内。溶液最好通过阀门或其他循环控制装置从最后一个充氧阶段流向反应室,从而在反应室中形成受控的连续元素
硫。