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Show W....-ed configuration MMry • 8nd fUel (pulverized coal, 011, ge. etc.) • --- IoaCbIcMw e6==~~~~ __ ~ depoeIIIon probe Ter1IIry .. -.. Cyclone/, furnace r-=-.,:-==:::;::., ~.n:h FIGURE 11 PULVERIZED COAL MODE OF OPERA nON FOR THE SMALL BOILER SIMULATOR Sampler. Cumulative batch samples were obtained by radial traverses and analyzed for carbon utilization. Initial testing utilized a pilot-scale B&W DRB-XCL ® burner for a benchmark comparison. Benchmark testing was performed in the SBS with the lliinois #6 design coal. Operating conditions at various loads and excess air levels were documented. Furnace exit gas temperatures, FLAMEVIEW temperature mappings, and fly ash samples were taken for various furnace conditions. The original overfrre air ports on the SBS were tested while frring with the pilot-scale DRB-XCL ® burner. Two sets of ports were tested and the results were compared to typical field performance. Initial results showed that the lower front wall ports, located at typical residence times, gave good results, however, modifications were needed to improve the air flow direction and velocity. These modifications were incorporated with the third series of testing on the SBS with the advanced 10w-NOx burner. The NOx emissions and UBC measurements during benchmark testing were found to be similar to results obtained in the Phase I testing at MIT (at the lower end of the span) and previously obtained results frring other coals with the pilot-scale DRB-XCL ® burner. Flame characteristics, burner pressure drop, 14 |