A. Ahlstrom Corporation

Pyropower Corporation

Matti J Isaksson

David B Russell

Steve J Provol

A power plant having a system for converting coal to power in a gas turbine comprises a coal fed pressurized circulating bed for converting coal to pressurized gases, a gas turbine having a compressor for pressurizing air for the pressurized circulating bed and expander for receiving and expanding hot combustion gases for powering a generator, a first fast acting valve for controlling the pressurized air, a second fast acting valve means for controlling pressurized gas from the compressor to the expander.

Control methods and valve arrangement for start-up and shutdown of

In a gas turbine process in which hot moist gas produced by combusting natural gas and injecting steam to the combustion device, the relative moisture content of the gas is reduced after the turbine by adiabatic absorption by means of an absorbent liquid the only evaporating component of which is water. The condensation heat of the aqueous steam condensed in the absorption is to a large extent conveyed to the gas the temperature of which is thereby raised. The heat is recovered by known methods for use e.g. in district heating. The diluted absorbent liquid is regenerated for example by arranging it in the heat recovery stage before the absorption in indirect heat exchange contact with the gas.

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Karhula, Finland

Matti J Isaksson