AMMONIA INJECTION DEVICE OF DENITRIFICATION FACILITIES

摘要

Disclosed is an ammonia injection device. The ammonia injection device injects (sprays) ammonia into an internal space of a reactor to mix and react exhaust gas and ammonia in denitrification facilities. The device comprises a nozzle pipe inserted into the internal space of the reactor through an insertion pipe equipped on one side of external surfaces of the reactor and installed to be removable in the insertion pipe; a nozzle equipped on one end of the nozzle pipe; and a first closure means to block discharge of ammonia injected into the internal space of the reactor when separating the nozzle pipe from the insertion pipe and drawing the nozzle pipe and the nozzle to the outside of the reactor. The first closure means comprises: an accommodation pipe located in parallel with the insertion pipe in the internal space of the reactor and enlarged from an internal surface of the reactor to the internal space of the reactor at the predetermined length; and a first plate combined on circumferences of the nozzle pipe by forming a shape corresponding to a cross-section shape of the accommodation pipe, and closing the internal space of the reactor and the inside of the accommodation pipe by being located vertically in an axis direction of the accommodation pipe when inserting the nozzle pipe into the accommodation pipe.