Engineer, design, construct, test and evaluate a pressurized fluidized bed pilot plant using high sulfur coal for production of electric power. Phase I: preliminary engineering. Technology support test report commercial fluidized long term erosion/corrosion test in a limestone kiln
The concept of using a pressurized fluidized bed-combined cycle power plant for producing clean, economical electric power from high sulfur coal is being developed. The C-W design approach uses an in-bed heat exchanger, with air as the coolant medium, both to control bed temperature and to extract useable heat from the bed. The heat exchanger is made from finned tubing, vertically oriented in the bed. Operating temperatures of the metal tubes are about 1500/sup 0/F to 1650/sup 0/F, the latter also being the maximum bed temperature. The high metal temperatures, and the aggressive combustion environment, can result in erosion and hot-corrosion (sulfidation) of the finned tubes. Little published data are available on the resistance of metal alloys to high temperature erosion-corrosion in actual fluidized bed coal combustors. For this reason a part of the program is directed toward the evaluation of alloys for the heat exchanger application. To gain experience with long time exposure in fluidized-beds, albeit not coal combustors, sub-sized finned tube bundles were installed in two operational, commercial, fluidized bed reactors, designed by Dorr-Oliver for industrial clients. One of these reactors is operated by the Pfizer Company in Adams, Mass., and is used to calcine limestone. Heat for the calcining process is produced by burning a No. 6 residual fuel oil within the limestone fluidized bed. It was believed that the sulfur and alkali-metal salt content in the fuel oil and limestone as well as the abrasiveness of the limestone would produce an erosive and corrosive environment somewhat similar to a coal-limestone fluidized bed. The tube bundle was uncooled and therefore operated at bed temperature (1500/sup 0/F to 1600/sup 0/F). After 4320 hours of operation, the calciner was shut-down for maintenance and the tube bundle removed for examination. The results of a metallurgical examination of the sub-scale heat exchangers are given.
- Research Organization:
- Curtiss-Wright Corp., Wood-Ridge, NJ (USA). Power Systems Div.
- DOE Contract Number:
- EX-76-C-01-1726
- OSTI ID:
- 5808219
- Report Number(s):
- FE-1726-35A
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
36 MATERIALS SCIENCE
20 FOSSIL-FUELED POWER PLANTS
FLUIDIZED-BED COMBUSTORS
HEAT EXCHANGERS
CORROSION
MATERIALS
INCOLOY 800
SULFIDATION
INCONEL ALLOYS
STAINLESS STEEL-304
ALLOYS
COAL
EROSION
FLUIDIZED-BED COMBUSTION
HAYNES 188 ALLOY
MEDIUM PRESSURE
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COMBUSTION
COMBUSTORS
CORROSION RESISTANT ALLOYS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCOLOY ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
OXIDATION
STAINLESS STEELS
STEELS
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion
421000 - Engineering- Combustion Systems
360105 - Metals & Alloys- Corrosion & Erosion
200100 - Fossil-Fueled Power Plants- Power Plants & Power Generation