Development of a High Pressure Dry Coal Feed System for a Two-Stage Slagging Gas Turbine Combustor PUBLIC ACCESS

[+] Author Affiliations
R. T. LeCren, D. J. White

Solar Turbines Incorporated, San Diego, CA

Paper No. 87-GT-270, pp. V003T05A009; 7 pages
  • ASME 1987 International Gas Turbine Conference and Exhibition
  • Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Anaheim, California, USA, May 31–June 4, 1987
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7925-2
  • Copyright © 1987 by ASME


Solar Turbines Incorporated, under the sponsorship of DOE-Morgantown Energy Technology Center has developed an advanced gas turbine coal-fired two-stage slagging combustor (TSSC). Rig test results using various coal-water mixtures have been reported previously (ASME 85-GT-206 and 85-JPGC/GT-17).

As part of the program it was required that the performance of the TSSC when operated with dry micronized coal be compared to that when burning coal water mixtures. As a prerequisite to this performance testing, a reliable high-pressure dry coal feed system had to be developed. A dense-phase feed and transport system was selected as the best compromise that satisfied the various needs. The system design development included the design and testing of a splitter system that divided the primary feed into four secondary flows. A number of problems were encountered and corrected during the testing. These problems, their solutions and the final system configurations are described. A comparison of the emissions using CWM and dry micronized coal is also presented. In general, NOx is higher and CO and UHC are lower on dry coal than on CWM because of the reduction of the reaction zone temperature by the water.

Copyright © 1987 by ASME
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