Method for combustion by regenerative burner

蓄熱式バーナによる燃焼方法

Abstract

(57)【要約】 【課題】 燃焼側のバーナにおいて空気比1.0未満で 燃料ガスの燃焼をおこなった場合でもすすの発生を抑制 できる蓄熱式バーナによる燃焼方法を提供する。 【解決手段】 対をなす蓄熱式バーナ1a,1bを燃焼 側と排気側に交互に切替え、燃焼側の蓄熱式バーナにお いては空気比1.0未満で燃焼をおこなって炉内を無酸 化雰囲気に維持する蓄熱式バーナによる燃焼方法におい て、一次燃料ノズル8への一次燃料ガス供給量G1と二 次燃料ノズル9への二次燃料ガス供給量G2との比率を G1/G2=30/70〜50/50の範囲内に維持す るとともに、燃焼用空気の5〜20%を一次燃料ノズル 8に供給される一次燃料ガスに予混合して予混合ガスと して前記空気供給路7に吹込み、燃焼用空気の残部を蓄 熱体6を介して空気供給路7に供給する。
PROBLEM TO BE SOLVED: To provide a method for combustion by a regenerative burner in which generation of soot can be suppressed even when a fuel gas combustion is conducted at an air ratio of at most 1.0 in the combustion burner. SOLUTION: In the method for combustion by a regenerative burner, a pair of regenerative burners 1a and 1b are switched alternately to a combustion side and to an exhaust side, the combustion generative-burner conducts combustion at an air ratio of at most 1.0 to maintain the inside of the furnace in a nonoxydative atmosphere. A ratio between the primary fuel-gas feed amount G1 for the primary fuel nozzle 8 and the secondary fuel-gas feed amount G2 for the secondary fuel nozzle 9 is maintained to satisfy G1/G2=30/70-50/50. Further, 5-20% of combustion air is pre-mixed with the primary fuel gas for the nozzle 8 and blown as pre-mixed gas into an air-feed path 7, further a remaining part thereof is fed to the path 7 through a thermal storage body 6.

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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    FR-2916764-A1December 05, 2008Gaz De France SaProcede et installation de chauffage d'une bande metallique, notamment en vue d'un recuit
    RU-2477325-C2March 10, 2013Гдф СуэцHeating method and plant of metal strip, namely for purpose of annealing
    WO-2008152275-A2December 18, 2008Gaz De FranceProcede et installation de chauffage d'une bande metallique, notamment en vue d'un recuit
    WO-2008152275-A3February 12, 2009Gaz De France, Philippe Buchet, Nicolas Richard, Pierre-Jacques LhommeProcede et installation de chauffage d'une bande metallique, notamment en vue d'un recuit