Method and System for Lining a Coal Burner Nozzle

A method of lining a duct having a first opening having a substantially elliptical cross-section, a second opening having a substantially rectangular cross-section, and one or more duct walls extending therebetween, said one or more duct walls shaped to form a transition from the substantially elliptical first opening to the substantially rectangular second opening, said method comprising:

• attaching a plurality of wall tiles to the one or more duct walls by:
• aligning an apex corner of a triangularly-shaped ceramic wall tile with an edge of the substantially elliptical first opening;
• aligning a base edge of the triangularly-shaped ceramic wall tile with an edge of the substantially rectangular second opening;
• coupling the triangularly-shaped ceramic wall tile to the one or more duct walls;
• aligning a base edge of a curved triangularly-shaped ceramic corner tile with an edge of the substantially elliptical first opening;
• aligning an apex end of the curved triangularly-shaped ceramic corner tile with a corner of the substantially rectangular second opening;
• and
• coupling the curved triangularly-shaped ceramic corner tile to the one or more duct walls using at least one of a weld to a weld insert in the curved triangularly-shaped ceramic corner tile and a high-temperature mortar;
• where at least one of the plurality of wall tiles includes an anti-roping bar that is integrally-formed with the at least one of the plurality of wall tiles, the anti-roping bar extending outwardly away from a surface of the at least one of the plurality of wall tiles into a flow path through the duct.

A pulverized coal burner comprising:

• a nozzle tip, at least partly protruding into a furnace;
• and
• a pulverized coal nozzle coupled in flow communication between said nozzle tip and a supply of a flow of fluidly conveyed particulate fuel, said pulverized coal nozzle comprising
• a duct having an inlet opening, an outlet opening, and a plurality of walls extending therebetween;
• and
• a liner system formed of abrasion resistant ceramic tiles coupled to said plurality of walls along an inner surface of the duct wall, said liner system includes:
• a first polygonally-shaped wall member extending from the inlet opening to the outlet opening, said first wall member comprising a substantially planar body;
• a second polygonally-shaped wall member extending from the inlet opening to the outlet opening, said second wall member comprising a substantially planar body having an integrally formed anti-roping bar that extends outwardly from a surface of the second wall member a predetermined height into a flow path through the duct;
• and
• a curved polygonally-shaped corner member extending from an inlet opening end of the conduit to an opposing outlet opening end of the conduit.

A liner system for a conduit for pneumatically conveying a particulate stream, the conduit comprising an inlet opening, an outlet opening, and a duct extending therebetween, said system comprising:

• a plurality of wall members;
• a plurality of anti-roping wall members;
• and
• an anti-roping bar comprising a plurality of anti-roping bar sections,
• wherein the wall members and the anti-roping wall members extend between an inlet opening end of the conduit to an opposing outlet opening end of the conduit, each of the wall members abutting at least one of another wall member and one of the anti-roping wall members to line an interior surface of the duct,
• wherein each of the anti-roping wall members comprises an integrally formed anti-roping bar section extending outwardly from a surface of the associated anti-roping wall member a predetermined height into a flow path through the duct,
• wherein the anti-roping wall members are arranged such that the anti-roping bar extends in a substantially straight line from a first location within the duct proximate to the inlet opening end to a second location within the duct proximate to the outlet opening end.

A liner system for a conduit for pneumatically conveying a particulate stream, the conduit comprising an inlet opening, an outlet opening, a duct extending therebetween, and a longitudinal axis extending through the longitudinal center of the duct, said system comprising:

• a plurality of wall members lining an inside area of the duct between the inlet opening and the outlet opening end of the conduit, each of the wall members adjacent to another wall member of the plurality of wall members;
• and
• an anti-roping bar integrally formed with at least one of the plurality of wall members and extending toward the longitudinal axis of the duct,
• wherein the anti-roping bar extends in a substantially straight line from a first location within the duct proximate to the inlet opening to a second location within the duct proximate to the outlet opening.