The Boc Group, Inc.

Christian J Feldermann

Donald P Satchell, Jr

A burner has a body portion and a main outlet. Fuel and primary oxidant outlets are arranged upstream of the main outlet and are disposed substantially concentrically about the axis of the burner. A chamber inside the body portion provides a place for the mixing of the fuel and oxidant. A laval nozzle provides acceleration of the mixed fuel and oxidant. Particulate matter are injected into a secondary oxidant flow immediately adjacent and downstream of the accelerating nozzle. The burner can be used in an electric arc furnace for decarburization of metals as well as post combustion. The burner can be mounted in a water-cooled box and can be fitted with an oxygen port for extra oxygen for post combustion while the burner injects hot oxygen and carbon for slag forming.

Particulate injection burner

A method of combustion and an apparatus therefor in which separate streams of very lean and very rich fuel/oxidant mixture are combusted separately, the products of combustion therefrom being thoroughly mixed before final combustion takes place. The lean/rich primary combustion minimizes combustion temperatures and pollutant formation, whilst the final combustion is substantially stoichiometric.

Variable stoichiometric combustion

This invention relates to a burner and a method of combustion for producing a flame jet sheet or sheets for various applications in industrial furnaces. The burner has at least one linear or curvilinear flame nozzle having a ratio of width to height of greater than unity in order to produce high velocity and high temperature flame jet sheet or sheets with a well defined geometry. The burner is capable of being scaled to various sizes for various industrial furnace applications due to its geometry.

Burner and combustion method for the production of flame jet sheets in industrial furnaces

A liquid fuel burner is provided with a central fuel outlet having a generally divergent conical inner surface, formed of two contiguous divergent conical surfaces of different angles of divergence, and a plurality of oxygen outlets shaped and positioned for creating a converging, rotating stream of oxygen which intersects with any liquid fuel issuing from the fuel outlet. Such oxygen/fuel interaction results in two zones of combustion and a recirculation effect which assists in the complete or substantially complete combustion of undesirable exhaust gas components. The oxygen and fuel are preferably supplied such that their velocities are approximately equal at the point at which the two zones of combustion meet.

Oxy/oil swirl burner

A burner is provided with a central fuel outlet and a plurality of oxygen outlets shaped and positioned for creating a converging, rotating stream of oxygen which intersects with any fuel issuing from the fuel outlet. Such oxygen/fuel interaction results in two zones of combustion and a recirculation effect which assists in the complete or substantially complete combustion of undesirable exhaust gas components.

Low emission swirl burner

A burner is provided with a burner block having a recess formed in the back thereof for receiving a fuel atomiser and a plurality of oxygen inlets for creating a converging cone of oxygen for intersection with any fuel issuing from the atomiser. Such an arrangement also provides a protective wall for protecting the atomiser from the harsh environment to which the burner is exposed and simplifies the oxygen supply arrangements.

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Sheffield, United Kingdom

Christian J Feldermann