| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas purifying method capable of completely treating the whole amount of recovered ammonia in a gas purification facility without discharging excess gas to the outside of the system, in a gas purifying method for carrying out wet removing treatment of impurities containing a sulfur compound and ammonia in gasified gas. SOLUTION: Ammonia C6 recovered from a cleaning solution is distributed and poured to gas inlet side and gas outlet side of a combustion furnace 41 of a regenerated gas H1 and further, as necessary, an oxygen-containing gas J1 for combustion is poured to the gas inlet side and the ammonia is burned together with a sulfur compound in the combustion furnace to carry out oxidative decomposition of ammonia and a discharge gas H2 into which the ammonia is poured on the gas outlet side of the combustion furnace is introduced into an ammonia catalytic reduction type NOx removal equipment 42 in high temperature state to carry out denitration treatment. |
