F - Mech Eng,Light,Heat,Weapons – 23 – G
Patent
F - Mech Eng,Light,Heat,Weapons
23
G
110/10
F23G 5/00 (2006.01) F23G 5/12 (2006.01) F23G 5/16 (2006.01) F23J 15/02 (2006.01)
Patent
CA 1089717
Title of the Invention :- Hot Gas Recirculation Type Burning Furnace Abstract of the Description :- This invention relates to a burning furnace of hot gas recirculation type for minimizing fuel cost. The furnace includes a cyclone which receives dust-containing exhaust gases. One or more secondary air-introducing nozzles are provided for the cyclone at top of or in close proximity to the upper end of the cyclone leading concentrically to a flue gas passage such as funnel. Upon introducing secondary air under pressure into the cyclone, a downwardly directing swirling air flow is formed therein for the separation of heavier dust together with part of the fed exhaust gases. The thus separated air-hot gas mixture including heavier dust particles is returned to initial stage of the furnace for the recirculation through the furnace. Lighter combustible soot or the like particles are burnt in a flame curtain formed in the cyclone and finally discharged together with main and substantially dust-free exhaust gas portion constituting an upwardly directing swirling core flow in the downwardly directing and swirling outer air flow, into the flue gas passage.
288327
Haga Toshikatsu
Hori Saburo
Ito Yukio
Borden Ladner Gervais Llp
Kureha Kagaku Kogyo Kabushiki Kaisha
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