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DEMONSTRATION OF SORBENT INJECTION TECHNOLOGY ON A TANGENTIALLY COAL-FIRED UTILITY BOILER (YORKTOWN LIMB DEMONSTRATION)
Clark, J. P., R. W. Koucky, M. R. Gogineni, AND A. F. Kwasnik. DEMONSTRATION OF SORBENT INJECTION TECHNOLOGY ON A TANGENTIALLY COAL-FIRED UTILITY BOILER (YORKTOWN LIMB DEMONSTRATION). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-94/184 (NTIS 95-105581), 1994.
The report summarizes activities conducted and results achieved in an EPA-sponsored program to demonstrate Limestone Injection Multistage Burner (LIMB) technology on a tangentially fired coal-burning utility boiler, Virginia Power's 180-MWe Yorktown Unit No. 2. his successfully demonstrated technology combines furnace injection of a calcium-based sorbent for moderate reductions of sulfur dioxide (SO2) with a low-nitrogen-oxide (NOx) firing system for NOx emissions reduction. he process is attractive for retrofit of existing coal-burning utility boilers, since the capital equipment requirements and overall sulfur reduction costs per ton of sulfur removed are less than for most other options, such as wet flue gas desulfurization. esting was conducted on an eastern bituminous coal with a typical sulfur content of 2.3%. Five sorbents were tested: commercial hydrated lime, with and without calcium lignosulfonate treatment, each from two suppliers, and finely pulverized limestone. esults of both extensive parametric testing and continuous long-term operation of the LIMB system are presented. esults of performance testing of the Low-NOx Concentric Firing System (LNCFS) Level II firing system are also presented. he effects of LIMB operation on boiler, electrostatic precipitator (ESP), and ash handling system performance are also discussed.