ENGINEER, DESIGN, CONSTRUCT, TEST AND EVALUATE A PRESSURIZED FLUIDIZED BED PILOT PLANT USING HIGH SULFUR COAL FOR PRODUCTION OF ELECTRIC POWER PHASEⅠ- PRELIMINARY ENGINEERING COMMERCIAL PLANT CONCEPTUAL DESIGN

摘要

A promising approach for production of environmentally clean and cost-competitive electric power generation from coal with improved power cycle efficiency involves the application of a pressurized fluidized bed (PFB) combustor to a combined cycle. A conceptual design of a 500 MW base load power station was prepared which used high (>3%) sulfur coal in the presence of a sulfur sorbent (dolomite) material. The gas turbine in this system provides one-third of its compressor airflow to the fluidized bed for coal combustion and the balance of flow to the in-bed heat exchanger. The plant which has a thermal" efficiency of 40 percent is modularized with three pairs of gas turbines, each driving a 100 MW alternator for a total of about 300 MW. The waste heat recovery boilers (one per gas turbine) produces a total of 1,600,000 lb/hr steam which drives one 200 MW steam-generator set. A cost analysis shows the plant capital cost is $640/kw. . An economic feasibility study shows the PFB combined cycle is at least 10% lower in cost of generating electricity than a pulverized coal conventional boiler and over 30% lower than oil fired boiler. The report describes the PFBC combined cycle plant arrangement, the equipment design configuration, and plant performance.