Air Products and Chemicals, Inc.

Gas Research Institute

Charles E Baukal, Jr

David Charles Winchester

James Francis Heffron

Larry K Farmer

Michael D Lanyi

Aleksandar Georgi Slavejkov

Vladimir Yliy Gershtein

Larry Saul Zelson

Paul T Kilhefner, Iii

Kenneth J Fioravanti

Edward Robert Bazarian

Louis Walter Monroig

Robert C Best

Prince Boyd Eleazer, Iii

Augustine Ivanhoe Dalton

William J Baxter

Method and apparatus for reducing NOx production during air-oxygen-fuel combustion by providing a central core of fuel surrounded by a sheath of oxygen at a combustion end of an air-oxygen-fuel burner. Diametrically opposed air passages are provided on either side of the oxygen sheath to permit entrainment of furnace gases into a flame zone created by primary combustion of fuel and oxygen. Oxygen can be introduced into each air passage to enhance combustion with low NOx emissions.

Method and apparatus for reducing NOx production during air-oxygen-fuel

Method and apparatus for reducing NOX production in an air-oxygen-fuel combustion process by creating post mix oxy-fuel flame and introducing air around said oxy-fuel flame at an angle of greater than 0.degree. to 90.degree. to the longitudinal axis of the oxy-fuel flame.

Method and apparatus for reducing NOX production during air-oxygen-fuel

A tuyere for refining molten metals or melting metal scrap or oxides charged into a vessel. The tuyere comprises three concentric pipes of copper or stainless steel encased in refractory. An annular stream of natural gas surrounds an annular stream of oxygen which in turn surrounds a core stream of natural gas. All three streams are expanded as they flow through the tuyere and as a result an accretion forms at the tip of the tuyere. The accretion protects the tuyere and the gas streams are controlled so that the accretion is maintained at a desired size which neither blocks the tuyere, nor permits burnback of the pipes.

Accretion controlling tuyere

A method for reducing the formation of nitrogen oxides (NO.sub.x) in air-fuel and oxygen-enriched air-fuel burners is disclosed wherein oxygen is introduced directly into the visible flame of the burner, whereby the beneficial effects of oxygen enrichment and the reduced formation of NO.sub.x can be realized simultaneously in the operation of such burners.

Reduction of nitrogen oxides in oxygen-enriched combustion processes

Oxy-fuel combustion combined with air-fuel combustion to increase productivity of the combustion process and reduce nitrogen oxides in the products of combustion by maintaining fuel rich oxy-fuel combustion while combusting the air-fuel as close as possible at stoichiometric conditions.

Method for reducing NOx production during air-fuel combustion processes

Increased cooling rate of an article heated to an elevated temperature is achieved by flowing an inert gas mixture of helium and another inert gas over the article under conditions of turbulent flow.

Rapid gas quenching process

A non-water cooled, nozzle-mixed oxy-fuel burner wherein high oxidant velocity and a venturi aspirate or recycle products of combustion through the burner block and mix them into the flowing oxidant stream to act as a diluent and provide mass to moderate flame temperature. The burner includes means in said oxidant stream to improve flame stability.

Growing community of inventors

Harleysville, PA, United States of America

Charles E Baukal, Jr