DEVICE FOR ELIMINATING WITHIN EXHAUST GAS AND METHOD FOR ELIMINATING

摘要

N ₂ O removal device of the present invention, a plurality of gas flow paths (1) and N ₂ O decomposing catalyst is charged charged catalyst layer (2) to, respectively, as arranged alternately N ₂ O removal apparatus, the catalyst filling layer 2, the gas flow path (1), which in between neighboring a, 11 a gas introduction and made of a 12 to a gas discharge, each gas flow channel, N ₂ are sequentially opened in accordance with the deterioration due to the change with time of O catalyst, the number of use of the catalyst-packed layer accumulatively N installing the valve (3) to increase _{with 2} and using O removal device, N ₂ in accordance with the change with time of after start O removal process , and by opening the valves 31 and 32, going by increasing the number of use of the catalyst filling layer (2) cumulatively. ;