| 摘要 |
PROBLEM TO BE SOLVED: To provide a desulfurization method for coke-oven gas capable of continuing desulfurization based on a Diamox method without stopping even when the operation of the posttreatment facility of desulfurization stops.SOLUTION: A desulfurization method for coke-oven gas includes making a hydrogen sulfide gas contained in a first coke-oven gas Gabsorb in a first absorbent L, and then collecting the hydrogen sulfide gas Gcontained in the first absorbent Lby pressurization stripping of the first absorbent Land regenerating the first absorbent L. The method is characterized by guiding the collected hydrogen sulfide gas Gtogether with a second coke-oven gas Gto a second desulfurization facility 3 which makes the hydrogen sulfide gas contained in the second coke-oven gas Gabsorb in a second absorbent Land then regenerates the absorbent Lby oxidizing and immobilizing the hydrogen sulfide gas contained in the absorbent L, and by immobilizing the hydrogen sulfide gs in a liquid state as a waste liquid 26 discharged from the second desulfurization facility 3.SELECTED DRAWING: Figure 4 |
