| 摘要 |
PROBLEM TO BE SOLVED: To stably and surely remove the NOx in exhaust gas by preventing the degradation in the denitrification performance of a denitrification catalyst by the influence of the siloxane included in digested gas. SOLUTION: The exhaust gas denitrification equipment 1 has an adsorber 4 which is disposed at fuel piping (flow passage) 3 for feeding the digested gas to a gas engine 2, a denitrification reactor 6 which is connected by exhaust piping (flow passage) 5 to the gas engine 2, a pretreating reactor 7 which is disposed upstream of the denitrification reactor 6, a reducing agent feeder 8 which feeds a reducing agent for denitrification in the exhaust gas flowing in the exhaust piping 5, and a controller 9 which controls the gas engine 2, the denitrification reactor 6, the reducing agent feeder 8, or the like. The siloxane in the digested gas is adsorbed in the granular active carbon of the adsorber 4 and is mostly removed and the siloxane included in the unburned gas in the exhaust gas of the gas engine 2 is brought into contact with spherical alumina in the pretreating reactor 7 and is removed by oxidation and therefore the deterioration of the denitrification performance of the denitrification reactor 6 by the siloxane does not occur. |
