Method and apparatus for the acceleration of solid particles entrained in a carrier gas
AssigneeArbed S.A.
InventorsFrancois Schleimer, Clement Burton, Andre Bock, Jean Peckels
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Abstract
A method and apparatus for accelerating solid particles entrained in a carrier gas so as to maximize the velocity of the particles at the output end of a duct is presented. This maximized or optimal acceleration is achieved by varying the cross section of the duct over at least the last 5 meters upstream from the opening thereof. Preferrably, the cross section of the duct should continuously increase i.e. diverge, towards the opening. This diverging cross section is preferrably in accordance with a nonlinear function of the length.
Claims16
A device for accelerating solid particles entrained in a carrier gas through a duct, the carrier gas flowing at subsonic speeds, said duct including exit section means terminating at an opening, the interior cross-section of said exit section means varying from a nominal value to a larger value over at least about 5 meters upstream from said opening whereby the subsonic velocity of said carrier gas increases at an approximately linear rate and whereby the velocity of said solid particles substantially approaches the velocity of said carrier gas at said opening.
A method for accelerating solid particles entrained in a carrier gas through a duct, the carrier gas flowing at subsonic speeds, the duct including an exit section terminating an an opening, the method comprising the steps of:
- varying the interior cross-section of said exit section from a nominal value to a larger value over at least about 5 meters upstream from said opening;
- and
- delivering the solid particles entrained in the carrier gas flowing at subsonic speeds through said exit section whereby the subsonic velocity of said carrier gas increases at an approximately linear rate and whereby the velocity of said solid particles substantially approaches the velocity of said carrier gas at said opening.
Dependencies are inferred from the claim text.