| 摘要 |
PURPOSE: To make calcium oxide in exhaust gas adhere to a grating plate and to prevent it from adhering to the surface of a catalyst by arranging the grating plate made of a metal or a material with the similar strength to the metal the surface of which is coated with a specified catalyst on the upstream side of the gas of a denitrification catalyst layer arranged in a denitrification apparatus to be replacable. CONSTITUTION: In a dry type denitrification apparatus, a reducing agent is injected into an exhaust gas exhausted from a combustion facility using coal as the main fuel to decompose and to remove nitrogen oxides in the presence of a TiO2 -WO3 -V2 O5 type catalyst being a nitrogen oxide selectively reducing catalyst and formed into a honeycomb shape. In the inner part of a grating part, by arranging a grating plate 4 being coated with a TiO2 -WO3 -V2 O5 catalyst with a thickness of about 1mm on the gas upstream side of a denitrification catalyst layer 3 in a denitrification reactor 2, calcium oxide in the exhaust gas 1 is made to adhere to the catalyst on the grating plate 4 to suppress the amt. of inflow of the calcium oxide into the denitrification catalyst layer 3 of the downstream side and to prevent the catalyst layer 3 from being deteriorated. |
