Furnaces – Including fluid fuel burner – Powdered solid fuel
Patent
1989-06-21
1990-08-28
Favors, Edward G.
Furnaces
Including fluid fuel burner
Powdered solid fuel
110260, 110263, 431189, 431284, F23C 110, F23C 112
Patent
active
049515810
ABSTRACT:
In a power plant boiler having oil and coal burning capability, a coal disperser support tube and an oil gun extending through the disperser support tube are slidable in a bearing sleeve extending through a removable access plate in the wall of an elbow of a coal guide. The disperser is arranged to be withdrawn into the coal guide delivery pipe by a first two-position, reversible, linear pneumatic actuator, and the oil gun is arranged to be withdrawn into the disperser support tube by a second similar actuator the body of which is carried with the piston of the first actuator and the piston of which is connected to the oil gun. The piston of the second actuator is withdrawn when the piston of the first actuator is extended to minimize space requirements. The dispenser support, oil gun, actuators, and associated parts are all mounted on the removable access plate, and can be removed as a unit with the access plate. Air is pumped into a space between axially spaced bearings in the bearings sleeve to cause high velocity flow of air past the bearing nearest the discharge end of the coal guide to prevent coal particles from approaching the bearings. Nuts on threaded studs extending axially from a flange on an outer sheath, secured to the coal guide and surrounding the bearing sleeve, provide angular adjustment of the bearing sleeve assembly for precise centering of the disperser support in the coal guide.
REFERENCES:
patent: 3256842 (1966-06-01), Vigneron et al.
patent: 4836772 (1989-06-01), LaRue
Aptec, Inc.
Favors Edward G.
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