Multi-spin mixer for particulate coal supply conduit

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

Patent

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Details

F23K 3/00 (2006.01) B01F 5/00 (2006.01) F23D 1/02 (2006.01) F23K 1/00 (2006.01)

Patent

CA 2528675

A mixer having two or more concentric cylindrical flow channels is placed in a supply conduit for a combustion chamber to mix airborne particulate coal prior to entering a manifold supplying four parallel branch conduits. Vanes are mounted in the mixer channels for imparting spin to the coal/air flow. The spin direction in one channel is opposite the spin direction of the adjacent channel(s). A turbulence-producing transition section is located downstream of the mixer.

L'invention concerne un mélangeur qui présente au moins deux conduits d'écoulement cylindriques concentriques, qui est placé dans une conduite d'amenée vers une chambre de combustion et qui sert à mélanger des particules de charbon en suspension dans l'air avant l'entrée dans une rampe de distribution alimentant quatre embranchements parallèles. Des ailettes sont montées dans les conduits du mélangeur pour imprimer une rotation à l'écoulement charbon/air. Le sens de rotation dans un conduit est opposé au sens de rotation dans le ou les conduits adjacents. Une section de transition produisant une turbulence est placée en aval du mélangeur.

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