Diamond Power International, Inc.

David L Keller

Tony F Habib

Steven R Fortner

In accordance with the teachings of the present invention, a sootblower design incorporates a downstream nozzle positioned on a nozzle block body and an upstream nozzle positioned longitudinally from the position of the downstream nozzle farther from a distal end of the nozzle block than that of the downstream nozzle. The upstream nozzle has a geometry that is different than the geometry of the downstream nozzle. By having nozzles of different geometries, each nozzle can be individually optimized for the flow conditions each nozzle experiences.

Sootblower nozzle assembly with nozzles having different geometries

The present invention discloses a new design of the nozzle and the lance tube of a sootblower to clean the interior of a heat exchanger by impingement of a jet of cleaning medium. In accordance with the teachings of the present invention the sootblower design developed, incorporates a nozzle at the tip of the distal end of the lance tube (downstream nozzle). The lance tube also includes an upstream nozzle positioned opposite and longitudinally apart the distal end nozzle. This design allows for the flow of the cleaning medium to enter into the inlet end of the nozzle without coming to a halt at the end of the lance tube. Further, the present invention also provides for a converging channel to be disposed in the interior of the lance tube to direct the flow of cleaning medium passing the upstream nozzle into the inlet end of the downstream nozzle with minimal hydraulic losses and flow maldistribution. The present invention also discloses an airfoil body to be placed around the upstream nozzle to minimize the flow disturbances caused by the bluff body of the converging channel.

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Wadsworth, OH, United States of America

David L Keller