Corrosion/erosion test in a 4 MW atmospheric fluidized bed boiler
Various aspects of the fluidized bed combustion of coal were studied under the auspices of the Dutch National Research Program of Coal Technology. Part of the project concerns the operation of a 2 x 1 m 4 MW Atmospheric Fluidized Bed Boiler (AFBB) at Apeldoorn, in which coal (0.86-1.56 wt% S, 0.06-0.10 wt% Cl) was burned at about 850/sup 0/C with limestone for sulfur capture. A schematic of the AFBB is shown. The aim of this program was to obtain data on the erosion/corrosion behavior of candidate AFBB materials in and above the bed, and to obtain information on the erosion/corrosion mechanisms involved. The anticipated active oxidation behavior in a low oxygen potential, non-slagging environment was not observed for the two silicon carbide materials. Overall, even though there is a suggestion that the corrosion rates of the uncooled alloys followed a linear rather than a parabolic rate law, the materials exhibiting the lowest rate of degradation at bed temperature were 16Cr-AlY, HA 188, and AlSl 310S. The sharp difference in wastage rates between the cooled ferritic alloys (2.25 Cr and 9Cr) is extremely significant and important in terms of power plant economics and merits further careful attention.
- Research Organization:
- Metaalinstituut TNO, Apeldoorn, Netherlands
- OSTI ID:
- 6352186
- Journal Information:
- Mater. Compon. Fossil Energy Appl.; (United States), Vol. 58; Conference: Institute of energy conference, London, England, 16-18 Oct 1984
- Country of Publication:
- United States
- Language:
- English
Similar Records
Atmospheric fluid bed cogeneration air heater experiment: Materials evaluation for an in-bed heater exchanger to heat air to 1500{degree}F (816{degree}C). Task 8, Observe, reduce and review test data
Materials technology for coal-conversion processes. Sixteenth quarterly report, October--December 1978
Related Subjects
01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
FLUIDIZED BED BOILERS
MATERIALS
HASTELLOY S
OXIDATION
INCOLOY 800H
STAINLESS STEELS
COAL
COMBUSTION
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HASTELLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCOLOY ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ADDITIONS
MANGANESE ALLOYS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
SILICON ADDITIONS
SILICON ALLOYS
STEELS
THERMOCHEMICAL PROCESSES
TITANIUM ADDITIONS
TITANIUM ALLOYS
200101* - Fossil-Fueled Power Plants- Cooling & Heat Transfer Equipment & Systems
014000 - Coal
Lignite
& Peat- Combustion
360105 - Metals & Alloys- Corrosion & Erosion