Be applicable to simple and easy ammonia spraying device of large -scale coal fired boiler

The utility model provides a be applicable to simple and easy ammonia spraying device of large -scale coal fired boiler, stretch into the reaction window flue inside, vertical gas pass cross -section longitudinal arrangement n cover, every set of ammonia spraying device includes ammonia ascending pipe, ammonia flow electrical control valve, ammonia gas nozzle, abrasionproof angle steel and backup pad. Ammonia ascending pipe one end is the cecum with the total union coupling of ammonia, the other end, and (being close to flue width s) is confirmed according to the flue cross -sectional width s of temperature window to length, and adjacent ammonia ascending pipe center distance is 15L~12L. An ammonia flow electrical control valve is connected to every ammonia ascending pipe outer end to adjust the flow of ammonia. Cloth has ammonia gas nozzle on the every ammonia ascending pipe, and upper and lower jet direction is perpendicular with flue gas flow direction, 100~500mm of axial injectors spacing. Every ammonia a