Porous ammonia gas spraying nozzle for ammonia gas spraying denitration system in fuel electric plant

The utility model discloses a porous ammonia gas spraying nozzle for an ammonia gas spraying denitration system in a fuel electric plant, which belongs to the field of components for the denitration system. A gas inlet straight pipe of the porous ammonia gas spraying nozzle for the ammonia gas spraying denitration system is connected with a spherical cap-shaped mixer; a central spraying nozzle is fixed in the center of the spherical cap-shaped mixer; and four lateral spraying nozzles are evenly distributed at the periphery of the central spraying nozzle. The ammonia gas enters into the spherical cap-shaped mixer from the gas inlet straight pipe; the spherical cap-shaped mixer enables ammonia gas pressure to be stable and spraying speed to be even; the ammonia gas is sprayed into the outer space through five spraying pipes at different angles, so that the ammonia gas can be evenly distributed in the outer space; and the utility model facilitates the even mixture between ammonia gas and flue gas, thereby improv