IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0454141
(1989-12-21)
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발명자
/ 주소 |
- Keller Leonard J. (1501 N. Cedar St. Bonham TX 75418) Stanton Austin N. (1501 N. Cedar St. Bonham TX 75418)
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인용정보 |
피인용 횟수 :
17 인용 특허 :
1 |
초록
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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;
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.
대표청구항
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Improved means of providing low-capital-cost, fuel-integrated, fully-fired, combined cycle power plants, called Methacoal Integrated Combined Cycle (MICC) Power Plants, for utilizing anhydrous or low moisture content coal-methanol slurry fuels (Methacoal fuels), and capable of achieving very high en
Improved means of providing low-capital-cost, fuel-integrated, fully-fired, combined cycle power plants, called Methacoal Integrated Combined Cycle (MICC) Power Plants, for utilizing anhydrous or low moisture content coal-methanol slurry fuels (Methacoal fuels), and capable of achieving very high energy conversion efficiencies and low-cost electric power generation, and also capable of substantially reducing exhaust gas emissions of nitrogen oxides, sulphur oxides and ultra-fine (one-tenth micron particle size range) particulates, compared to conventional coal-fired or conventional lignite-fired power plants which are not equipped with the most advanced chemical scrubbers, comprising: a thermal separation plant for said Methacoal fuels for producing clean condensate liquid fuels (CLF), and highly reactive pulverulent carbonaceous fuels (PCF); a gas turbine generator plant for burning said CLF, in liquid or vapor form, to produce electric power; a steam boiler plant, or steam generator plant, for burning said PCF to produce steam for said electric power generation; a relatively small firebox for said steam boiler plant, designed to accommodate the rapid-burning said PCF, provide near-optimum retention time for the products of combustion at the high firebox temperatures, and provide substantially complete combustion, limit the retention time sufficiently to minimize the formation of said nitrogen oxides, and minimize ash fusion problems and slagging problems in said firebox and in other parts of said steam boiler plant; a steam turbine generator plant for using said steam to produce additional said electric power; said gas turbine generator plant and said steam turbine generator plant sized in capacity, with respect to one another, to provide the total capacity desired, and to also allow the use of essentially all of said CLF and essentially all of said PCF, during normal operating conditions and ranges of load requirements, to allow adequate management of inventories of said CLF and said PCF as fuels for said MICC power plant; means for utilizing essentially all of the gas turbine exhaust gases as the principal source of firebox combustion air for burning of said PCF in said firebox, during most of said normal operating conditions and said normal ranges of load requirements, to effect the recovery and reuse of most of the heat energy from said gas turbine exhaust gases for use in the generation of said steam.
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