| 摘要 |
<p>PURPOSE: To efficiently remove H2 S by bringing H2 S-contg. gas into contact with an aq. absorbent and regenerating the absorbent to evolve regenerated exhaust gases, sending these gases to an S recovery plant and further making the SO2 in the plant exhaust gases absorbed away as H2 S. CONSTITUTION: The H2 S-contg. gas is sent through a pipe 4 to a first absorption zone 1 where the gas is brought into contact with the aq. absorbent, such as an alkanol amine, and the H2 S is absorbed away. The loaded absorbent is sent from the first absorption zone 1 to a regenerator 11. The H2 S-contg. exhaust gases generated therein are sent through a pipe 15 to the S recovering plant 35 where elementary S is formed by a Claus reaction. Further, the plant exhaust gases generated there are sent to a converter 39 where the SO2 is reduced to the H2 S. The gases are then sent to a second absorption zone 32 where the H2 S is absorbed and the semi-loaded absorbent is sent to the regenerator 11. The regenerated absorbent is circulated to both absorption zones 1, 32, respectively.</p> |
