Burner nozzle for pulverized coal
OwnerPeter Boweninventor
Life of this patent
Estimating the term…
Abstract
A stationary coal nozzle for a burner on a pulverized coal fired furnace having an elongated tubular nozzle with an inlet for receiving a flowing stream of coal/air mixture and an outlet for discharging the flowing stream into a combustion zone of a furnace for burning. A multiple of transversely extending rib segments protrude into the nozzle from its inside wall and are circumferentially arranged for distributing and diffusing a flowing stream of pulverized coal in the coal/air mixture upon exiting the nozzle outlet. A deflector plate may also be provided which closes off an upper portion of the nozzle inlet to prevent pulverized fuel roping.
Claims18
A stationary coal nozzle for a burner on a pulverized coal fired furnace comprising:
- an elongated tubular nozzle having inside and outside walls, an inlet for receiving a flowing stream of coal/air mixture and an outlet for discharging the flowing stream into a combustion zone of a furnace for burning;
- a first set of four transversely extending rib segments positioned in a first common transverse plane and protruding into said nozzle from said inside wall and circumferentially arranged about said inside, wall in different quadrants for distributing and diffusing a flowing stream of pulverized coal in said mixture upon exiting said outlet.
A nozzle for a burner on a pulverized fuel fired furnace, including an elongated tubular nozzle having inside and outside walls, an inlet for receiving a flowing stream of coal/air mixture and an outlet for discharging the flowing stream into a combustion zone of a furnace for burning, and a fuel distributor on said inside wall for assisting in distributing and diffusing a flowing stream of pulverized coal in said mixture upon exiting said outlet;
- the improvement comprising said distributor including first set of four inclined longitudinally extending ramp segments positioned in a first common transverse plane with leading edges of said ramp segments facing said inlet and trailing edges of said ramp segment facing said outlet with said leading edges protruding into said nozzle from said inside wall and providing inclined segment surfaces on said ramp segments extending from said leading edges to said trailing edges, said surfaces converging outwardly toward said nozzle inside wall in the direction of said nozzle from said inlet to said outlets, said ramp segments circumferentially arranged on said inside wall in different quadrants.
Dependencies are inferred from the claim text.