Power plants – Combustion products used as motive fluid
Patent
1992-07-17
1994-02-15
Bertsch, Richard A.
Power plants
Combustion products used as motive fluid
60 3912, 60 39182, F02C 600
Patent
active
052856275
ABSTRACT:
A gas and steam turbine plant includes a coal gasification plant, a gas turbine connected downstream of the coal gasification plant, a steam turbine having a water-steam loop and a steam generator connected downstream of the gas turbine. The steam generator includes a preheater connected to the water-steam loop, a heater of a high-pressure stage connected downstream of the preheater, and a heater of a low-pressure stage connected upstream of the preheater. An outflow line leads into the coal gasification plant and is connected to the water-steam loop downstream of the preheater, as seen in water flow direction. A heat exchanger has a primary side integrated with the water-steam loop between the low-pressure stage and the high-pressure stage and a secondary side connected parallel to the outflow line. A method for operating the gas and steam turbine plant includes generating steam in the water-steam loop with heat contained in an expanded operating fluid of the gas turbine, heating the working fluid with gas, drawing preheated water for a coal gasification process from the water steam loop, and altering the temperature of the partial quantity in a loop coupled with the water-steam loop for adjusting a set-point temperature of the drawn water by mixing it with a partial quantity of the drawn water.
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Losel Georg
Schwarzott Werner
Bertsch Richard A.
Kocharov Michael I.
Siemens Aktiengesellschaft
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