Second generation PFBC system research and development: Phase 2, Topping combustor development
- Westinghouse Electric Corp., Orlando, FL (United States)
The use of a Circulating Pressurized Fluidized Bed Combustor (CPFBC) as the primary combustion system for a combustion turbine requires transporting compressor air to the CPFBC and vitiated air/flue gas back to the turbine. In addition, the topping combustion system must be located in the returning vitiated airflow path. The conventional fuel system and turbine center section require major change for the applications. The selected arrangement, which utilizes two topping combustor assemblies, one on each side of the unit, is shown in Figure 1. Half of the vitiated air from the CPFBC enters an intemal plenum chamber in which topping combustors are mounted. Fuel gas enters the assembly via the fuel nozzles at the head end of the combustor. Combustion occurs, and the products of combustion are ducted into the main shell for distribution to the first-stage turbine vanes. Compressor discharge air leaves the main shell, flowing around the annular duct into the adjacent combustion shells. The air flows around the vitiated air plenums and leaves each combustion assembly via nozzles and is ducted to the CPFBC and carbonizer. Because the air entering the combustor is at 1600{degrees}F rather than the 700{degrees}F usual for gas turbines, the conventional type of combustor is not suitable. Both emissions and wall cooling problems preclude the use of the conventional design. Therefore, a combustor that will meet the requirements of utilizing the higher temperature air for both wall cooling and combustion is required. In selecting a combustor design that will withstand the conditions expected in the topping application, the effective utilization of the 1600{degrees}F air mentioned above could satisfy the wall cooling challenge by maintaining a cooling air layer of substantial thickness.
- Research Organization:
- Foster Wheeler Development Corp., Livingston, NJ (United States); Westinghouse Electric Corp., Orlando, FL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC21-86MC21023
- OSTI ID:
- 10117430
- Report Number(s):
- DOE/MC/21023-93/C0147; CONF-921034-10; ON: DE93005023
- Resource Relation:
- Conference: 9. annual coal-fueled heat engines, advanced pressurized fluidized-bed combustion (PFBC), and gas stream cleanup systems contractors review meeting,Morgantown, WV (United States),27-29 Oct 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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