| 摘要 |
PROBLEM TO BE SOLVED: To reduce energy cost and reduce equipment cost.SOLUTION: Exhaust gas treatment equipment includes: a bypass exhaust line 30; and a gas circulation line 31 that includes a circulation blower 32, a circulation gas heater 33, a catalytic reaction tower 20, and a heat exchanger 17, and decomposes ammonium salt of sulfuric acid deposited in the catalytic reaction tower 20 and the heat exchanger 17 by heated circulation heated gas. A circulation gas exhaust channel portion 31c for discharging a part of the circulation heated gas from the gas circulation line 31 and introducing the part of the circulation heated gas to an inlet of a bag filter 16, and a supplementation outdoor air introduction channel portion 31d for introducing outdoor air into the gas circulation line 31 when the part of the circulation heated gas is discharged are provided in this gas circulation line 31. Heat decomposition components of the circulation heated gas discharged from the circulation gas exhaust channel portion 31c are captured by the bag filter 16 and then discharged from the bypass exhaust line 30 into atmosphere. |
