APPARATUS FOR FEEDING AMMONIA IN HIGH TEMPERATURE EXHAUST GAS DENITRIFICATION EQUIPMENT

摘要

PURPOSE:To perform denitrification with high efficiency by suppressing conversion reaction of NH3 into NOX in an ammonia feeding pipe of a high temp. exhaust gas denitrification equipment and feeding a required appropriate amt. of NH3 into a denitrification apparatus. CONSTITUTION:In an ammonia feeding apparatus of a high temp. exhaust gas denitrification equipment wherein denitrification of nitrogen oxides in a high temp. exhaust gas 1 is performed by feeding ammonia therein in the presence of a denitrification catalyst 2 and performing reduction thereof into harmless nitrogen, conversion reaction of fed NH3 into NOX is suppressed by insulating thermally at least a part or the whole of the apex parts of the ammonia feeding pipe 4 and a nozzle 6 provided in a duct of the high temp. exhaust gas or holding the inner wall temp. of the ammonia feeding pipe and the nozzle at 400 deg.C or lower by providing a cooling means.