Regenerative oxygen preheat process for oxy-fuel fired furnaces

Details Regenerative oxygen preheat process for oxy-fuel fired furnaces Regenerative oxygen preheat process for oxy-fuel fired furnaces

F - Mech Eng,Light,Heat,Weapons

23

L

F23L 15/02 (2006.01) F27D 17/00 (2006.01)

Patent

CA 2257705

A method and apparatus for supplying oxygen to an oxy-fuel fired furnace that has been preheated by heated flue gas recycled from the furnace. One or more regenerators are provided each having at least a first and a second regenerator bed. The beds are alternately cycled so that one is being preheated with hot flue gas exhausted from the furnace while the other is preheating oxygen through its already heated bed for supply to the furnace burner. The amount of hot flue gas supplied to the regenerator beds is controlled by continuously venting a portion of the total furnace flue gas so as to bypass the regenerators, and the regenerator beds are purged of residual oxygen by recycled cooled flue gas which is then supplied to the furnace before the regenerator beds are heated by the flue gas.

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