| abstract |
The invention discloses a V-type ammonia spraying and mixing system for an SCR (Selective Catalytic Reduction) smoke denitrification device. The V-type ammonia spraying and mixing system comprises static mixers, ammonia spraying branch pipes with nozzles at end parts and ammonia spraying header pipes communicated with the ammonia spraying branch pipes; each static mixer is formed by arraying a plurality of mixing units, each mixing unit is composed of two blades distributed in a V shape, and an included angle between each blade and a smoke flow is 30-60 degrees; and a nozzle opposite to each blade is arranged below the blade, and a distance between each nozzle and each blade is 0.2-1 time that of the height of the corresponding mixing unit. The V-type ammonia spraying and mixing system disclosed by the invention has the advantages of fewer nozzles and simplified ammonia spraying device; symmetric reverse vortexes can be formed with strong vortex mixing, so that a mixing process is strengthened to make ammonia distribute uniformly, and meanwhile, a distance required for achieving the goal of homogenizing the ammonia is shortened, so that the denitrification efficiency is enhanced; and the caused pressure drop is lower and the energy utilization efficiency is high. |