| 摘要 |
PURPOSE: A method for simultaneous removal of nitrogen oxide (NOx) and nitrous oxide (N2O) is provided to reduce costs to form apparatuses for removal of the respective NOx and N2O since the NOx and N2O are removed at the same time in the fluidized bed combustor. CONSTITUTION: A method for simultaneous removal of NOx and N2O is as follows. A reducing agent included in porous fluidization material is evaporated from the surface, and reacts to the NOx and N2O so that the selective non catalytic reduction (SNCR) occurs. The fluidization material, which is lighten by evaporation of a part of the reducing agent, removes to the upper part higher than the area the fluidization material is jetted. A part of NOx and N2O, which are diffused into the pore of the porous fluidization material, occur the selective catalytic reduction (SCR) with the reducing agent in the surface of the pore. The reducing agent, which is absorbed in the pore in slurry state, is evaporated and removed completely. The fluidization material becomes much lighter and moves much higher upper part, and unreacted N2O is degraded in the pore of the fluidization material. [Reference numerals] (a) Step 1: SNCR reaction of NOx by ammonia generated by urea decomposition (reaction area i); (b) Step 2: SCR reaction of NOx and N_2O by ammonia generated by urea decomposition (reaction area ii); (c) Step : decomposing reaction of N_2O (reaction area iii) |
