Power plants – Motive fluid energized by externally applied heat – Power system involving change of state
Patent
1990-01-31
1990-12-11
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Power system involving change of state
60645, 110224, F23G 504
Patent
active
049761072
ABSTRACT:
The invention concerns a procedure for improving the efficiency of a steam power plant process wherein damp fuel is used, which is dried by conducting at least part of the flue gas flow to a fuel drying process. In addition to the feed water the combustion air is preheated in steam power plants with tapped steams from the turbine, in counter-pressure power plants with tapped steams and/or counter-pressure steams, and in remote heating power plants with tapped steams and/or remote heating water. As taught by the invention, the temperature of the flue gas going to the damp fuel dryer installation (10), or the cooling of the flue gas flow by-passing it, is controlled by taking thermal energy from the flue gas and transferring it to the combustion air and/or the feed water, their quantity and/or temperature being controlled in accordance with the cooling requirements of the flue gases determined by the drying requirements of the damp fuel.
REFERENCES:
patent: 3835650 (1974-09-01), Chesmejef
patent: 4291539 (1981-09-01), Potter
patent: 4414813 (1983-11-01), Knapp
patent: 4423689 (1984-01-01), Merz
patent: 4516511 (1985-05-01), Kuo
patent: 4656955 (1987-04-01), Kuo
patent: 4750434 (1988-06-01), Salter
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