F - Mech Eng,Light,Heat,Weapons – 27 – D
Patent
F - Mech Eng,Light,Heat,Weapons
27
D
F27D 99/00 (2010.01) F23D 99/00 (2010.01) F23D 23/00 (2006.01) F27B 17/00 (2006.01)
Patent
CA 2427888
The method of the invention concerns operation of a furnace (1) utilising a hydrogen-rich gas as furnace fuel. The furnace (1) has a multiplicity of burners (17) for burning fuel supplied thereto. The method comprises providing ignition means for lighting a flame at at least one burner of the multiplicity of burners. An oxygen-containing gas and a combustible gas comprising a hydrocarbon gas are supplied to each of the multiplicity of burners (17) in amounts capable of forming an ignitable mixture. A flame is ignited at the predetermined one burner which is then allowed to propagate from the at least one predetermined burner to the other burners of the multiplicity of burners (17). Then the composition of the combustible gas is altered over a period of time so as to replace at least a major part of the hydrocarbon gas by a hydrogen-rich gas until a hydrogen flame is established at each of the multiplicity of burners (17).
Le procédé de l'invention concerne le fonctionnement d'un fourneau (1) utilisant comme combustible, un gaz riche en hydrogène. Le fourneau (1) comporte une pluralité de brûleurs (17) servant à brûler le combustible acheminé. Le procédé consiste à fournir un dispositif d'allumage d'une flamme au moins au niveau d'un brûleur. On achemine un gaz contenant de l'oxygène et un gaz combustible renfermant un gaz d'hydrocarbures au niveau de chacun des brûleurs (17), en des quantités qui permettent de former un mélange inflammable. On allume, au niveau du brûleur prédéterminé, une flamme qui peut ensuite se propager aux autres brûleurs de la pluralité de brûleurs (17). Puis, on modifie la composition du gaz combustible sur une période de temps, de manière à remplacer au moins une grande partie du gaz d'hydrocarbures par un gaz riche en hydrogène, jusqu'à ce qu'une flamme d'hydrogène se forme au niveau de chacun des brûleurs (17).
Hilton Michael
Kippax John Wilson
Davy Process Technology Limited
Ridout & Maybee Llp
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