| 摘要 |
Methacoal Integrated Combined Cycle Power Plants comprise a thermal separation plant for producing condensate liquid fuel and particulate carbonaceous fuel from Methacoal fuels, coal-methanol suspensoids or slurries; gas turbine generator plants for burning the liquid fuel to produce electric power; steam turbine generator plants for producing electric power; a boiler plant for producing steam for steam turbines; a small firebox for burning reative particulate carbonaceous fuel, with minimum retention time for high temperature combustion gases and minimum oxygen required for combustion, thus minimizing emissions of nitrogen oxides and hazardous ultra-fine particulates; and means for controlling ash fusion and slagging problems. The two generating plants are respectively sized to provide the capacity required, and to consume the two fuels in the proportions produced from the Methacoal fuels, during normal operations, allowing fuel inventory control. Gas turbine exhaust gases provide most combustion air for burning particulate fuel. Other uses of gas turbine exhaust heat facilitate control and achieving the high overall efficiencies. Capacity is about one-fourth gas turbine generated power to three-fourths steam turbine generated power for these new plants. Conventional combined cycle power plants have about two-thirds gas turbine generated power and only one-third steam turbine generated power. The invention facilitates low-cost retrofitting of steam power plants. New power plants will be much less costly than other coal or lignite power plants available, including fluid bed combustion plants and integrated gasification combined cycle plants. |
