Power generation system

Abstract

Provided is a power generation system in which the combustion heat of hydrocarbon gas is used to heat the steam for power generation; at the same time, the exhaust heat thereof is used to dry and dry-distill low rank coal. Due to the use of a moving bed dry distillation furnace, it is possible to keep the product gas temperature reduced; further, fewer restrictions are imposed on materials such as those for gas pipes, etc., and it is possible to achieve excellent maintainability. Further, due to low-temperature dry distillation, the product gas temperature is low, and it is possible to solve problems due to a tar component; further, fixed carbon is produced by utilizing the exhaust heat of the combustion step and of the power generation step, so that the system is excellent in energy-saving efficiency and resource-saving efficiency, making it possible to utilize low rank coal, which is of high moisture content and difficult to use in places other than the point of origin, in places other than the coal-producing region. The power generation system includes: a dry distillation step for dry-distilling low rank coal of high moisture content; a cooling step for cooling the fixed carbon obtained in the dry distillation step; a combustion step in which hydrocarbon gas obtained in the dry distillation step is used as the main fuel; and a power generation step in which there are provided a power generator moving a steam turbine by main steam generated in the combustion step and a condenser.

Dependencies are inferred from the claim text.