| 摘要 |
PURPOSE:To enhance strength of the supporting mechanism of an injection nozzle of ammonia and also to uniformly supply gaseous ammonia by eliminating a supporting member in a duct casing or decreasing the number of pieces thereof. CONSTITUTION:A header 1 for injecting ammonia and a base pipe 4 for injecting ammonia which is connected to the header 1 are provided in the upstream side duct of the catalytic layer of a denitrification device for exhaust gas. A group of nozzles for injecting ammonia is formed in the horizontal direction or the vertical direction in the duct 7 by providing the nozzles 3 for injecting ammonia in the base pipe 4. The base pipes 4 closed in one end are arranged in the header 1 in the shape of the teeth of a comb. The side disconnected to the header 1 of the base pipe 4 is supported and fixed to the other header 1 for injecting ammonia. |
