PROCESS AND ARRANGEMENT FOR OPERATING A DRYER FED BY HEATING STEAM

摘要

The invention pertains to a process and arrangement for operating a dryer fed by heating steam, in particular a coal dryer (4), in a power plant. The aim of the invention is to integrate the energy of the exhaust vapors into the power generating process with the greatest possible degree of efficiency. This is achieved by superheating the saturated steam (21) with hot steam (15) and feeding the resulting superheated steam (22) into the low-pressure section of the steam turbine or into another steam turbine. To accomplish this the invention provides that the saturated steam line (12) is connected to a steam-steam heat exchanger (2) in the superheated steam line (1) and the steam line (13) of the steam-steam heat exchanger (2) is connected to the low pressure section of the steam turbine or another steam turbine.