Gilbert proposes short lead-time coal-fueled combined cycle

Journal Article · Sat Dec 01 04:00:00 EST 1973 · Elec. Light Power, E/G Ed., v. 51, no. 23, pp. 26-27

OSTI ID:4412475

The design of a 150-Mw commercial coalgas-powered combinedcycle plant is proposed. Inputs to the Gilbert gasifier are preheated air and powdered coal, sized to 5 mm X O. The air, entering through a grate at the bottom, will produce a fluidized bed, avoiding the caking problem of fixed-bed gasifiers. A small portion of the coal's carbon will be oxidized to CO, supplying enough heat to drive off the volatiles. The resultant fuel gas will have a heat value of about 250 BTU per cubic foot. The gas fuels the gas turbine part of the plant, after passing through the gasifier-air preheater, a cleanup system, and a compressor. The system is proportioned so that the gas turbine generates 30 percent of the total power. The gasifier convents only a small part of the coal to fuel gas, with char remaining that contains almost all the ash from the original coal and one-half the sulfur. The char is sent to the Ignifluid boiler to fuel the steam side of the cycle. Following the boiler are a feedwater economizer section, a low-pressure boiler, and a conventional steam turbine-generator system. The complexity of removing sulfur is a drawback, and the biggest advantage is that it will operate with high-ash coal, including fuel recovered from waste piles or waste of present mining operations. (MCW)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-29-009639
• OSTI ID: 4412475
• Journal Information: Elec. Light Power, E/G Ed., v. 51, no. 23, pp. 26-27, Journal Name: Elec. Light Power, E/G Ed., v. 51, no. 23, pp. 26-27; ISSN ELEGC
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*COAL-- ELECTRIC POWER
*COMBINED CYCLES-- PLANNING
AIR
BOILERS
ECONOMICS
GAS TURBINES
HEATING
N80200* --Energy Utilization & Economics
POWDERS
STEAM TURBINES
SULFUR
SULFUR OXIDES