COMBUSTOR CROSSING TRIPLE ANNULUS TUBE TYPE REDUCING AGENT INJECTOR FOR NOX REDUCTION BY SELECTIVE NON-CATALYTIC REDUCTION

摘要

A reducing agent injector is provided to inject a reducing agent into a combustion room uniformly, thereby maximizing the efficiency in removal of nitrogen oxides, by installing a triple-pipe type injector passing through a wall of the combustion room. A reducing agent injector(14) injects a reducing agent into a combustion room, wherein the reducing agent reacts with nitrogen oxides contained in a combustion gas. The injector is installed such that the injector penetrates both walls(9) of the combustion room. The injector comprises a reducing agent supply pipe(10) having a plurality of injection nozzles(11), a cooling water supply pipe(12) for wrapping the reducing agent supply pipe, and a cooling water discharge pipe(13) communicating with the cooling water supply pipe and wrapping the cooling water supply pipe. The injection nozzles pass through the cooling water supply pipe and the cooling water discharge pipe to be exposed to an outside of the cooling water discharge pipe.