Francis Joseph Fitzgerald

US Patent:

53277260, Jul 12, 1994

Filed:

May 22, 1992

Appl. No.:

7/886893

Inventors:

Ernest L. Daman - Westfield NJ
Francis D. Fitzgerald - Phillipsburg NJ
Robert J. Zoschak - Glen Rock NJ

Assignee:

Foster Wheeler Energy Corporation - Clinton NJ

International Classification:

F01K 1700
F01K 2304

US Classification:

60648

Abstract:

A pyrolyzer unit and two-staged furnaces are provided in a compact furnace assembly for combusting coal to generate power. Coal is reacted in the pyrolyzer to produce a clean hot fuel gas and char. The hot fuel gas is combusted in the first-stage furnace, which contains a high-temperature heat exchanger utilized to heat a pressurized air stream for expansion in a gas turbine and a heat exchanger for superheating steam for expansion in a steam turbine to produce power. Char is combusted in the second-stage furnace and the resulting combustion products are mixed with primary combustion gas from the first-stage furnace to product a secondary combustion gas and preheat the pressurized air stream, and also to superheat steam. The heated air stream is expanded in a gas turbine to produce shaft power to drive an air compressor and an electric power generator. The hot secondary combustion flue gases and hot air exhaust from the gas turbine are used for preheating pressurized water to generate the steam for the steam turbine cycle.

US Patent:

57133115, Feb 3, 1998

Filed:

Feb 15, 1996

Appl. No.:

8/601810

Inventors:

Francis D. Fitzgerald - Edison NJ

Assignee:

Foster Wheeler Energy International, Inc. - Clinton NJ

International Classification:

F22B 2100
F22D 700

US Classification:

1224065

Abstract:

A hybrid steam generating system and method in which fluid is passed through the waterwall tubes of a furnace to transfer heat from the furnace to the fluid to convert at least a portion of the fluid to steam. Under certain operating conditions, the heated fluid is passed from the furnace to a separator for separating the steam from the heated fluid and the separated heated fluid is passed from the separator back to the furnace. The steam from the separator is passed to a steam utilization unit, and, under certain operating conditions, the heated fluid is passed from the furnace directly to the steam utilization unit.