Method and arrangement for the generation of energy, particularly

Abstract

Dried, finely divided coal is admitted into a gasifying chamber wherein it undergoes partial oxidation in the presence of air and water vapor so as to form a combustible gas. The combustible gas is cooled by heat-exchange with water thereby causing low-pressure and high-pressure steam to be generated. After being washed, compressed and desulfurized, the cooled combustible gas is admitted into a combustion chamber. Here, it is combusted in the presence of preheated air so as to form a combustion gas. The hot combustion gas preheats the air and water vapor used for the partial oxidation, superheats the high-pressure steam previously produced and generates additional high-pressure steam. As a result, the combustion gas is cooled. The cooled combustion gas is expanded in a gas turbine which drives an electrical generator. The expanded combustion gas then preheats the air which is used for the combustion, preheats the water which is to be converted to steam and also dries the coal which is to undergo partial oxidation. The high-pressure steam which has been generated is expanded in a steam turbine which drives an electrical generator. The steam recovered from the steam turbine may be condensed and recycled so as to again serve as a source of steam. The low-pressure steam generated by the combustible partial oxidation gas may serve as a source of water vapor for the partial oxidation. In the above manner, electrical energy may be generated in an economical manner.