OCR Text |
Show TABLE 1 DESIGN DEFICIENCY ANALYSIS Desi2D Deficiency Description Development Activity Low-NO. Burner Performance The LEBS low-NO. burner must meet the team goal Through engineering analysis, experimental testing, of 0.1 lb NOjMBtu while not adversely impacting and numerical modeling design and demonstrate a the CO, unburned carbon (UBC), or particulates. burner capable of achieving the NO. goal without adversely impacting the CO, UBC, or particulates. Staged Combustion An advanced overfire air system must be developed Through engineering analysis, experimental testing, and demonstrated to control the NO. emissions, while and numerical modeling, design and demonstrate an not adversely affecting the UBC, flame stability, or advanced staging system to achieve the desired NO. corrosion potential. ~goal . Rebuming System If reburn technology were to be implemented, the If needed, design a reburn system capable of Performance system must be demonstrated and optimized. achieving the NO emission goal . ControlS/Sensors Through engineering analysis, assess the needs of A control and sensor system must be developed to the burner system. Integrate the controls & sensors optimize and maintain the various NO. control strategies. into the burner and staging system development with the Controls & Sensors subsystem. Corrosion Assess current low-NO, technologies and the effect The impact of the low stoichiometric ratio and the on the corrosion potential. Perform corrosion studies effect of the high metal temperatures on the boiler corrosion potential must be assessed. on burner/furnace operation. Perform modeling studies to assess the risk of corrosion. Fuel Preparation Assess the needs of the burner system through The optimal grind size, top size, and primary air/coal engineering analysis, experimental testing, and ratio need to be determined. numerical modeling to develop performance and design requirements. Furnace Design Specifications The impact of the furnace, burner and staged Perform modeling studies to help optimize the LEBS FIGURE 5 combustion systems as a whole must be assessed. plant design along with the Boiler subsystem MIT - RADIALLY STRATIFIED FLAME CORE BURNER (RSFC) PC-Fired Low NOx DRB-XCL® Burner Outer lone Ad,ustable lIane ..-_-a--. ;.;, 1991'..,02A7Il 'nner lOM Stattonary A" Measurong Ad,ustable lIane lIanes P,tot Grod Sliding Disk Pu'-.zed Col' ContU' And Slldl"l DIsk Drrve Otlfuser PrimAry A" 'nlet FIGURE 6 B&W PC-FIRED LOW-NOx DRB-XCL ® BURNER 6 |