Recovery boiler smelt spout

摘要

A spout for a recovery boiler such as those used in the papermaking industry. As in prior art spouts of this type, the spout is provided with an internal cavity to thereby permit water cooling of the spout. By this invention, a duct is provided for the internal cavity, the duct applying a portion of the coolant liquid to specific areas of the spout which in the past have failed. Further, the radius of curvature of the lowermost portion of the spout is increased by a factor of two. The useful life of the spout of this invention is in excess of twenty five weeks, as compared to a prior art spout whose useful life is about two weeks.