Patent ID: 6190628
Filing Date: 2001-02-20
Classification: B01D,Y02C

Abstract:
A method for injecting NO.sub.x inhibiting liquid reagent into a boiler having boiler gas flowing therein in a direction of flow, the boiler including an opening, the method comprising:mounting a conduit having a nozzle, the conduit being activable for injecting NO.sub.x inhibiting reagent, and mounting the conduit such that the conduit and nozzle are movable into the gas in the boiler through the opening and movable out of the gas and out of the opening;sensing a temperature of the gas in the boiler;when the temperature of the gas is sensed to be within a selected range, activating the conduit to insert the nozzle into the gas through the opening and activating the conduit to spray reagent through the nozzle into the gas; andwhen the temperature of the gas is sensed to be outside the selected range, activating the conduit to withdraw the nozzle from the gas and out of the opening, and deactivating the conduit so that no reagent is supplied through the conduit to the nozzle.