The utility model discloses a
urea pyrolysis denitration accurate
ammonia preparation
ammonia spraying device, which relates to the technical field of
urea denitration
ammonia preparation, and comprises a
pyrolysis furnace, the left side of the
pyrolysis furnace is connected with an atomization spray gun, and the left side of the atomization spray gun is connected with a
urea solution adjusting valve and a
dilution water adjusting valve. The upper part of the pyrolyzing furnace is sequentially connected with a hot air adjusting valve and a hot
air heating device, the lower part of the pyrolyzing furnace is connected with a
zoning adjusting valve, the
zoning adjusting valve is connected with a
zoning ammonia spraying grid, the zoning adjusting valve is also connected with a
NOx analyzer, and the
NOx analyzer is used for adjusting and controlling the urea solution adjusting valve, the
dilution water adjusting valve, the hot
air heating device and the hot air adjusting valve. According to the method,
ammonia production and total ammonia supply amount optimization accurate control is achieved, then partition ammonia injection
grid partition adjustment control is combined, an ammonia injection grid is divided into 6 partitions of 3 * 2, long pipes and short pipes are combined, and local ammonia injection optimization accurate ammonia injection and full mixing reaction of an ammonia injection
system in a denitration reactor are achieved.