| 摘要 |
Sulfur trioxide is removed from a gas obtained by oxidizing hydrogen sulfide to sulfur trioxide in at least one catalyst-containing reactor. The method comprises feeding the effluent from the last reactor to a separation unit for sulfur trioxide removal, and it is characterized in that the effluent is mixed with a slurry or powder of a sorbent or a combination of sorbents, injected into the mixture through one or more injection points in the separation unit or upstream of it, to form a mixture of a sulfate and a hot clean gas, from which the sulfate is subsequently separated by any means selected among gas-solid separation unit operations, and wherein a mist filter in combination with the separation unit is used for removal of acid mist, while residual S03, which is not present as a mist, is removed in a quench scrubber. |
