The Babcock & Wilcox Company

Babcock & Wilcox Power Generation Group, Inc.

Larry A Hiner

Edward E Gayhart, Jr

John B Parisi

Scott C Moyer

Steven L Osborne

William Downs

John E Monacelli

James F Desellem

Karl M Heil

William R Stirgwolt

John A Kulig

Timothy E Hicks

Jeffrey J Gries

Xiaoyu Guo

Steven I Osborne

Material handling systems for fluids are disclosed herein. The fluid may be a liquid, solution, slurry, or emulsion. The systems receive as inputs the fluid, steam, and water. These feed into a surge tank where additives can be introduced. The steam and water are used to control some physical properties and enable the distribution of the fluid as desired. In particular embodiments, the system is useful for handling materials to be sent to a dual-phase fuel feeder for combustion in a fluidized-bed boiler, the energy being used to generate electricity or in various production processes.

Material handling system for fluids

An apparatus for using a water coil air heater with a single bank economizer. A boiler economizer arrangement includes an economizer bank which has separate hot pass bank and cold pass bank economizer portions in a parallel arrangement, each facing the same flow of hot flue gas. Feedwater enters the cold pass bank economizer where it is heated by the hot flue gas, and then flows to a water coil air heater away from the hot flue gas. The feedwater dissipates heat energy in the water coil air heater which may be used to heat air bound for combustion. The feedwater continues into the hot pass bank economizer portion of the economizer arrangement where it absorbs additional heat from the flue gas. The heated feedwater flows out of the economizer arrangement and may be subject to additional heating by a boiler or other heat exchanger.

Split pass economizer bank with integrated water coil air heating and feedwater biasing

An enhanced steam cycle utilizing a dual pressure recovery boiler with reheat. A dual pressure designed recovery boiler furnace is provided with a lower furnace and an upper furnace. The lower furnace is operated at a lower temperature to prevent or reduce corrosion of the lower furnace wall tubes. The lower furnace can be either a low pressure natural circulation steam generating (drum) system or economizer. The upper furnace operates as a high pressure natural circulation steam generating (drum) system, or as a once-through supercritical steam generating system at higher temperatures and pressures permitting implementation of higher efficiency reheat steam cycles.

Enhanced steam cycle utilizing a dual pressure recovery boiler with reheat

An apparatus and method for achieving increased NOremoval efficiency from an emissions control portion of a fossil fuel fired boiler while controlling ammonia slip provides excess levels of ammonia above those levels conventionally employed in SCR and/or SNCR applications. The apparatus and methods comprise, in part, use of a NOreduction system comprising at least one selective catalytic reduction system which receives ammonia in higher amounts than conventional practice from an upstream ammonia injection point, and an ammonia reduction system positioned downstream of one or more ammonia injection points and the NOreduction system. The excess ammonia achieves increased NOremoval, while the ammonia reduction system contains at least one ammonia destruction catalyst which permits the NOreduction system to be operated at an increased NOremoval efficiency without a corresponding increase in ammonia slip.

Enhancement of conventional SCR and SNCR processes with ammonia destruction catalyst

A wedge shaped form is mounted on the splash plate of a black liquor nozzle with the sharp edge of the wedge located at the exhaust of the nozzle to split the black liquor from the nozzle into two flat sheets on each side of the wedge with no droplet formation at the center of the nozzle exhaust.

Wedge splash plate for kraft recovery furnace black liquor burners

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Orrville, OH, United States of America

Larry A Hiner