Patent ID: 8114359
Filing Date: 2012-02-14
Classification: B01D,B01J,F28D

Abstract:
1. An SNCR distribution grid for delivering a reactant for reducing NOx into a gas stream containing NOx, comprising: at least one element for conveying the reactant from a source outside of the gas stream, the element having at least one nozzle for spraying the reactant from a conduit defined within the element into the gas stream, the conduit being formed by at least two fluid-cooled tubes and membranes located in-between the tubes, the at least one nozzle being located in at least one of the membranes, the at least one element being provided with a protective tile, the protective tile provided with a spacer to provide a gap between the protective tile and the at least one membrane for reducing heat absorption by the membrane, the spacer provided with a portion which extends around an outside diameter of the at least one nozzle and a portion which extends within an aperture in the protective tile to prevent excessive movement of the protective tile during operation.