Methods and apparatus for injecting NOx inhibiting reagent into the flue gas of a boiler.

摘要

A conduit (22) is provided with a nozzle (24) for injecting NOx inhibiting reagent into an appropriate temperature window in the flue gas of a package, utility, or industrial type boiler (10) to reduce emissions of NOx. A temperature sensor (26) is mounted adjacent the nozzle (24) to measure the flue gas temperature thereby locating the appropriate temperature window, and a controlled drive (28,30) moves the nozzle (24) to the temperature window. <IMAGE>