| 摘要 |
<p>The process and the apparatus are intended for continuous removal of hydrogen sulphide from gas streams which may contain from 0.01 ppm to 100% of hydrogen sulphide. The process consists in treating the gas streams with an aqueous solution of metal chelate, reoxidising the aqueous chelate solution with a gas containing molecular oxygen, separating off the liquid phase containing the aqueous chelate solution, thoroughly mixing the said liquid phase with a sulphur-entraining agent which is slightly soluble or insoluble in water, separating off, by settling, the aqueous chelate solution from the entraining agent containing the sulphur, recycling the purified aqueous chelate solution towards the gas stream treatment zone, recycling all or part of the entraining agent towards the thorough mixing zone and maintaining the sulphur concentration of the entraining agent in the thorough mixing zone at a value below the sulphur saturation threshold of the entraining agent. <IMAGE></p> |
