Patent ID: 7066401

Claim:
A lance-type spraying assembly for directing a liquid reducing agent comprising: a lance body having an inlet end and a downstream end; and a spray nozzle arranged at the downstream end of the lance body; wherein the lance body includes an air passage for connection to an air supply, a liquid reducing agent supply passage for connection to a liquid reducing agent supply and a liquid reducing agent return passage, the liquid reducing agent supply passage communicating with the spray nozzle, the liquid reducing agent return passage communicating with the liquid reducing agent supply passage near the downstream end of the lance body for recirculating a portion of the liquid reducing agent and extending near the liquid reducing agent supply passage along at least a portion of the length thereof in order to help cool the liquid reducing agent therein, the liquid reducing agent return passage being sealed against the spray nozzle, and the air passage extending near at least a portion of the liquid reducing agent supply passage in order to help cool the liquid reducing agent therein.