Microbeam’s advanced analysis and services are applicable to the following combustion systems:
Pulverized and Cyclone Coal-Fired Boilers
Our Solution: Based on more than 20 years of experience and thousands of fuels analyzed, Microbeam provides accurate predictions of ash behavior to help improve boiler performance. We use computer-controlled scanning electron microscopy to determine the size and composition of mineral material within the fuel. By characterizing fuel with our advanced techniques, we provide ash-behavior predictions for various regions of the boiler. Fuel performance is estimated in terms of slag-flow behavior, abrasion and erosion wear, wall slagging, high-temperature silicate-based convective pass fouling, and low-temperature sulfate-based convective pass fouling.
Bubbling and Circulating Fluidized Bed-Fired Boilers
Your Challenge: Bed agglomeration, ash deposition on heat transfer surfaces, and erosion are of specific concern in regard to fluidized-bed combustion systems. These issues may lead to bed-fluidization problems, more frequent bed turnover, diminished heat transfer, and increases in downtime for cleaning and materials replacement. Additional factors impacting ash-related problems include the quantity and association of inorganic constituents in the coal, system design, and operating conditions.
Our Solution: Microbeam will conduct an-depth analysis of bed materials, agglomerates, deposits, and fuels to help identify bonding phases and temperatures responsible for bed agglomeration. We identify bed agglomeration and ash deposition mechanisms through a combination of scanning electron microscopy techniques, including morphological analysis and point-count analysis. This information will assist in proper selection of bed material—an important factor in minimizing bed agglomeration. For example, the presence of silica in high-sodium lignite coals is particularly challenging.