Coanda gas burner apparatus and methods

F - Mech Eng,Light,Heat,Weapons – 23 – D

Patent

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Details

F23D 14/22 (2006.01) F23C 9/06 (2006.01) F23D 14/58 (2006.01)

Patent

CA 2591458

A gas burner apparatus for discharging a mixture of fuel gas, air and flue gas into a furnace space of a furnace wherein the mixture is burned and flue gas having a low content of nitrous oxides and carbon monoxide is formed is provided. The burner tile includes at least one gas circulation port extending though the wall of the tile. The interior surface of the wall of the tile includes a Coanda surface. Fuel gas and/or flue gas conducted through the gas circulation port follows the path of the Coanda surface which allows more flue gas to be introduced into the stream. The exterior surface of the wall of the tile also includes a Coanda surface for facilitating the creation of a staged combustion zone. Also provided are improved burner tiles, improved gas tips and methods of burning a mixture of air, fuel gas and flue gas in a furnace space.

Un brûleur à gaz qui permet de déverser un mélange de gaz combustible, d'air et de gaz de carneau dans une chambre de four où le mélange est brûlé et dans lequel se forme un gaz de carneau à faible contenu d'hémioxydes d'azote et de monoxyde de carbone. La brique du brûleur comprend au moins un nez de circulation des gaz qui dépasse de la paroi de la brique. La surface intérieure de la paroi de la brique comprend une surface de Coanda. Le gaz combustible et/ou le gaz de carneau dirigé à travers le nez de circulation des gaz suivent le trajet de la surface de Coanda, ce qui permet d'apporter plus de gaz de carneau dans le flux. La surface extérieure de la paroi de la brique comprend aussi une surface de Coanda pour faciliter la création d'une zone de combustion étagée. Sont également fournies des briques de brûleurs améliorées, des buses de gaz et des méthodes améliorées pour brûler un mélange d'air, de gaz combustible et de gaz de carneau dans une chambre de four.

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