Bench-Scale Ash-Behavior Testing Equipment.
MTI utilizes a small-scale fluidized bed reactor was used to expose bed material to coal ash as a function of ash quantity and temperature at a constant fluidization velocity to examine agglomeration potentials of bed materials.
Test conditions vary based on fuel type and bed material composition. MTI’s advanced heat exchange deposition probe has also been incorporated into the design, and located above the bed in the gas stream. This heat exchange system was designed by MTI for advanced power systems, and the technology is in the development and testing phase as part of a Phase II National Science Foundation SBIR grant. MTI’s heat exchange system allows for removal of ash deposits on-line, with minimal corrosion of heat exchange surfaces.
After exposure, samples of bed material, agglomerates (if present),
ash deposits cyclone ash, and filter ash were examined using scanning
electron microscope (SEM) morphological analysis to determine the compositions,
coating thickness on bed particles, and bonding materials in ash deposits.
Schematic diagram of MTI's fluidized bed reactor system.