Generic Studies of Advanced Fluid Bed Air Heater Technology. Topical Report Number 1. Task 1: System Configuration (Bubbling Beds); Task 5: Bed and Heat Exchanger Losses

摘要

The atmospheric fluid bed, air heater cycle offers the potential for a low cost, uncomplicated method for combustion of sulfur-bearing coal in an environmentally acceptable manner for industrial and small utility application. Since these cycles are relatively new, some of the basic configurational concepts have not yet been established. This DOE project, Generic Studies of Advanced Fluid Bed Air Heater Technology, is a multi task program to evaluate various coal-fired, generic systems suitable for industrial cogeneration utilizing low-pressure, fluidized-bed technology to provide high efficiency energy systems. The program screens fixed as well as circulating systems with special emphasis on economic factors, risk identification, and ease of operation in industrial application. This Topical Report Number 1 presents the study results from Tasks 1 and 5. Task 1 developed a turbine exhaust gas blown, bubbling, fluid-bed, air heater design and identified the other plant equipment required for a coal fueled cogeneration plant. The design, performance and costs were compared with a fan-blown, bubbling-bed, AFBAH plant previously developed for the DOE Coal Combustor For Cogeneration, CCC-19, program. Design and performance information are contained in this report. Topical Report Number 6 contains the cost and economics data for all of the generic systems. Two important findings emerged as the study progressed, one rather early in the program. First, due to the natural of the fluid bed, air at about 80 inches of water is required for fluidization and combustion. Therefore, in the turbine blown case with the high back pressure requirement on the turbine, the gas turbine power output was only 81% of the fan blown system. Comparison of the cost figures between the two concepts produced the second important finding. The turbine blown system turned out to be only 2.3 percent less expensive than the fan blown concept. 133 figs., 25 tabs. (ERA citation 11:029215)