Method and nozzle for supplying paste fuel to a fluidized bed
AssigneeABB Carbon AB
InventorsStephen N. Barker, Thomas Wallin
Life of this patent
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Abstract
The nozzle contains a conduit for supply of paste fuel. A tapering end of the conduit is located towards an outlet for the nozzle. A spout for supplying splitting air is directed towards the outlet for the nozzle. The jet of splitting air is imparted by the spout in the shape of a cone which has an outer edge tangent to an inner edge of the outlet for the nozzle.
Claims8
A method for comminuting paste fuel supplied from a nozzle to a fluidized bed, wherein the fuel in the nozzle is pressed against an annular end surface tapering towards a nozzle outlet, and is distributed by means of a jet of splitting air ejected from the nozzle centrally of the fuel flow, upstream of the nozzle outlet, comprising the additional step of imparting the shape of a cone to the jet of splitting air in the absence of a cone shaped deflection cone at the nozzle outlet, with an outer edge of the cone of splitting air being tangent to an inner edge of the nozzle outlet.
A nozzle assembly for supplying a paste fuel to a fluidized bed, the paste fuel being comminuted, the nozzle assembly comprising
- a conduit for supplying the paste fuel, the conduit tapering at an end proximal to an outlet of a nozzle,
- a spout for supplying splitting air located centrally to the conduit and extending towards the outlet of the nozzle,
- an opening of the spout located upstream from the outlet of the nozzle, the opening of the spout constructed to impart a shape of a cone to the splitting air delivered therefrom without the presence of a deflecting cone, an outer edge of the cone of splitting air being tangent to an inner edge of the outlet of the nozzle.
Dependencies are inferred from the claim text.