Hot corrosion/erosion testing of materials for application to advanced power conversion systems using coal-derived fuels. Task II: fluidized bed combustion. Third task report, July 1-September 30, 1978

Technical Report · Mon Jan 01 04:00:00 EST 1979

DOI:https://doi.org/10.2172/5101056· OSTI ID:5101056

Nutkis, M. S.; Bertrand, R. R.; Ernst, M.; Hoke, R. C.; Loughnane, M. D.; Siminski, V. J.

The second and third segments of a 1000 hour exposure test of potential gas turbine and boiler tube materials for use in Pressurized Fluidized Bed Coal Combustion were successfully completed. This brought the total exposure time to 565 hours on the gas turbine specimens and 682 hours on the heat exchanger specimens. The 100 hour test (Run 79) had to be terminated prematurely because of a plug in the solids discharge line from the first (recycle) cyclone. The 215 hour test (Run 80) was interrupted at the 82 hour mark to replace a leaking valve. After the interruption, the turbine flow rate dropped 12% as a result of a blockage at the turbine inlet. The lower level flow, still within specifications, was maintained for the duration of the run. Measurements of the particulate loading entering the gas turbine during Run 79 indicated a rise in loading from a level of 0.01 gr/SCF at the beginning to 0.03 gr/SCF near the end of the test. This increase was presumably a consequence of the first cyclone dipleg plugging. The particulate had a mass median size of 1.5 microns with little variation from the beginning to the end of the test. During Run 80 particulate measurements taken before and after the turbine were low and consistent, averaging about 0.02 gr/SCF. The particulates had a mass median size of 1.2 microns. The gas turbine specimens showed no visible signs of attack after 565 hours. There was, however, substantial flyash deposition, similar to the deposits found after the first 250 hour test. All the heat exchanger probe specimens looked satisfactory except for an Inconel 800/Hastelloy X probe controlled at 1400/sup 0/F. There was considerable wastage and a small rupture near the capped end. A piece was removed for analysis and the probe repaired for future tests.

• Research Organization: Exxon Research and Engineering Co., Linden, NJ (USA). Government Research Labs.
• DOE Contract Number: EX-76-C-01-2452
• OSTI ID: 5101056
• Report Number(s): FE-2452-33
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION PRODUCTS
COMBUSTORS
CORROSION
DATA
DEPOSITS
ENERGY SOURCES
EROSION
EXPERIMENTAL DATA
FLUE GAS
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUELS
GAS TURBINES
GASEOUS WASTES
HEAT EXCHANGERS
INFORMATION
MACHINERY
MATERIALS
MATERIALS TESTING
MEDIUM PRESSURE
NUMERICAL DATA
OXIDATION
PARTICLE SIZE
PARTICLES
REMOVAL
SIZE
TEST FACILITIES
TESTING
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY
WASTES