Patent ID: 8010236
Filing Date: 2011-08-30
Classification: B01D,F01N,Y02T,Y10T

Abstract:
1. A selective catalytic reduction (SCR) system, comprising: a) a plurality of reagent injection nozzles, each nozzle configured and adapted to be independently calibrated during the SCR reaction to distribute a reagent to an SCR catalyst downstream from the injection nozzles; b) a plurality of sensors, each located at a separate grid point, wherein the sensors are configured and adapted to measure at least one of reagent and contaminant levels at the SCR catalyst; c) an optimization computer configured and adapted to determine an influence coefficient for each injection nozzle for a catalyst independently of the other injection nozzles and to determine an optimum rate of flow of reagent for each nozzle; and d) an automated control system in communication with the optimization computer and the plurality of injection nozzles, the automated control system being configured and adapted to calibrate rate of flow from each injection nozzle to the optimum rate of flow, independently of the other injection nozzles, wherein the optimization computer is configured to determine the optimum rate of flow of reagent based on the following equations: wherein: N=Number of Injection nozzles, M=Number of grid points, X A B K AMM D