Bloom Engineering Company Inc.

Stephen P Pisano

Harry P Finke

John R Hemmerlin

Anthony G Fennell

Glenn W Baggley

John C Dormire

An apparatus and method for using staged air combustion. The apparatus includes a burner body () secured to a port block (), and a fuel passageway () extending through the burner body (), terminating in a fuel nozzle (), which injects fuel into the burner throat (). Primary air jets () are configured to inject primary air into a primary combustion region (), which is normally in the burner throat (). A dish with a dish surface () is connected to the burner throat (); the dish surface () extending in a divergent angle with respect to a burner centerline (). Secondary air jets () are connected to the air passageway () and extend through the port block (). The secondary air jets () inject secondary air into a secondary combustion region (), which may be at the dish surface () or the hot face () of the burner.

Air staged low-NOx burner

A radiant tube assembly comprises a radiant tube having a burner leg, an exhaust leg and a recuperator inside the exhaust leg and in a stream of products of combustion flowing in the exhaust leg. The recuperator has an air intake port at a first end and a mixing baffle at a second, hot end. The mixing baffle causes combustion air and products of combustion to be mixed at the hot end of the recuperator and provided to the burner leg for combustion. The mixing baffle includes a flow director which increases the amount of products of combustion mixed with the combustion air. The mixing baffle can also include a dome-shaped end which extends into the stream of products of combustion for reducing turbulence of the stream of products of combustion flowing in the exhaust leg.

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Cranberry Township, PA, United States of America

Stephen P Pisano