Abstract: A combustion chamber for burning low BTU fuel comprising a generally cylindrical casing having adjacent outer and inner annular spaces defined by outer, intermediate and inner walls, the spaces intercommunicating at the downstream end of the casing thereby providing a U-shaped flow path. The outer annular space traverses the entire length of the casing while the inner space extends to the approximate mid-point of the casing, thereby communicating with internally disposed combustion units. In operation, fuel as coolant is fed to the outer space at the upstream end, traverses the U-shaped flow-path thus making a double pass around the combustion zone of the combustion chamber and thence to the combustion units for ignition. Improved cooling is obtained.

Abstract: In a gas turbine power plant having a pressurized fluidized bed combustor, gas turbine-air compressor subsystem and a gas clean-up subsystem interconnected for fluid flow therethrough, a pipe communicating the outlet of the compressor of the gas turbine-air compressor subsystem with the interior of the pressurized fluidized bed combustor and the gas clean-up subsystem to provide for flow of compressed air, heated by the heat of compression, therethrough. The pressurized fluidized bed combustor and gas clean-up subsystem are vented to atmosphere so that the heated compressed air flows therethrough and loses heat to the interior of those components before passing to the atmosphere.

Abstract: The gas turbine power plant with a fluidized-bed combustor for the burning of coal comprises a closed circuit or loop cooling system for the fluidized-bed combustor through which is circulated liquid metal. The cooling system includes, in the bed of the fluidized-bed combustor, a first heat exchanger by which the liquid metal absorbs heat from the bed and a second heat exchanger by which heated liquid metal is passed in indirect heat exchange with compressed air to heat the latter, the heated compressed air being mixed with the combustion products discharged from the fluidized-bed combustor at a point upstream from the gas turbines.