Bladed coal diffuser and coal line balancing device
AssigneeBabcock & Wilcox Power Generation Group, Inc.
InventorsAlbert D. Larue, Leonard D. Hazlett, Kurt S. Titmas, Zumao Chen
Life of this patent
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Abstract
A coal nozzle assembly for a pulverized coal burner includes a diffuser. A flow conditioner also may be used with the assembly. The assembly conditions the coal/air flow before the coal/air flow is introduced to the furnace. The flow conditioner directs the coal into the diffuser where it is swirled to form a fuel rich outer ring disposed about an air rich inner portion before the fuel is delivered to the coal nozzle.
Claims25
A coal nozzle assembly for a pulverized coal burner, the coal nozzle assembly comprising:
- a coal nozzle having an upstream inlet and a downstream outlet and a longitudinal direction, the coal nozzle having a wall having an inner surface;
- a diffuser positioned in the coal nozzle closer to the upstream inlet than the downstream outlet, the diffuser having a body with a tapered upstream portion, the diffuser having a plurality of blades extending outwardly from the body;
- a burner elbow connected to the upstream inlet of the coal nozzle;
- wherein the burner elbow defines an observation portion and the elbow comprises a flow conditioner therein, said flow conditioner resulting in a pressure drop in said elbow;
- wherein the flow conditioner is adapted to direct a coal rope toward the upstream portion of the diffuser.
A coal nozzle assembly for a pulverized coal burner, the coal nozzle assembly comprising:
- a coal nozzle having an upstream inlet and a downstream outlet, the coal nozzle having a wall having an inner surface;
- a burner elbow disposed upstream of the upstream inlet wherein the elbow comprises an adjustable flow conditioner therein, the adjustable flow conditioner resulting in a pressure drop in said elbow;
- a diffuser positioned in the coal nozzle closer to the upstream inlet than the downstream outlet, the diffuser having a body with a tapered upstream portion, the diffuser having a plurality of angled blades extending outwardly from the body;
- and
- the adjustable flow conditioner having a fixed portion and a moveable portion, the fixed portion being adapted to direct a coal rope into the tapered upstream portion of the diffuser and the moveable portion being selectively movable for rotation between 0° and 90° on an angle adjustment plate to adjust the pressure drop across the burner elbow.
Dependencies are inferred from the claim text.