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Show rifled coal nozzle with venturi diffuser assembly and convergent nozzle tip can be seen in the figure. The pilot and main air plenums, helical flow vanes, and shadow vanes are also depicted. The current AO-II field installations are listed in Figure 9 with other pertinent information. The City of Jamestown Unit 10 and BPU Kansas City are currently undergoing start-up and demonstration testing. Unit Customer Unit Type ---- -- Bd of Public Utll. 9 CE-VU40 City of Jamestown Bd of Public Utll. '0 CE-VU40 City of Jamestown Bd of Public Utli. Qulndaro Riley Kansas City Unit 2 Figure 9: RO-II Experience List CONCLUSIONS Steam Flow Ib/hr - '65.000 '65 .000 '.125.000 No. of Burners Fuels E. Bit 4 E. Bit 9 Sub-Bit. Natural Gaa Propane ABB-CE's AO-II coal burner, specifically designed for retrofit wall-fired boiler applications, has undergone extensive laboratory testing and is now commercially available. In laboratory trials, the burner was shown to meet the NOx target of 0.5 Ib/MBtu firing Eastern U.S. bituminous coal while limiting increases in carbon loss, CO, and flame length to commercially acceptable levels. The burner also demonstrated the ability to operate within the capacity of most existing boiler combustion air fan and coal delivery systems in terms of static pressure requirements. The AO-II burner offers advantages in terms of its simplified construction and operation. In addition, the AO-II burner has the ability (via adjusting the main/pilot air damper system) to equalize burner to burner combustion air flow imbalances in multiple burner/common windbox plenum arrangements. 6 REFERENCES 1. Zeldovich, Y. et al. (1947), Oxidization of Nitrogen in Combustion, Academy of Sciences of the USSA, Institute of Chemical Physics, Moscow-Leningrad, Translated by M. Shelf, Scientific Aesearch Staff, Ford Motor Co. 2. Beard, P. et al "Aeduction of NOx Emissions form a 500 MW Front Wall-Fired Boiler" 1989 Joint EPA/ EPAI Symposium on Stationary Combustion NOx Control. 3. Grusha, J. and McCartney M., "Development and Evolution of the ABB Combustion Engineering Low NOx Concentric Firing System"- 1991 Joint EPA/EPAI Symposium on Stationary Combustion NOx Control. 4. Kinoshita, et al "New Approach to NOx Control Optimization and Unburnt Carbon Losses" - 1989 Joint EPA/EPAI Symposium on Stationary Combustion NOx Control. 5. Clark, M.J. et al "Large Scale Testing and Development of the B&W Low NOx Cell Burner" - 1987 EPA/ EPAI Symposium on Stationary Combustion Nitrogen Oxide Control. 6. LaAue, A. et al "Development Status of B&W's Second Generation Low NOx Burners - The XCL Burner" - 1987 EPA/EPAI Symposium on Stationary Combustion Nitrogen Oxide Control. |