PROCESS FOR REDUCING COAL CONSUMPTION IN COAL FIRED POWER PLANT WITH STEAM PIPING DRYING

摘要

The present invention relates to a process for reducing coal consumption in coal fired power plant with steam-piping drying, namely a steam-piping drying system is provided between a coal grinding mill and a coal powder bunker as well as a weighing belt of the prior coal fired boiler generating set, and superheated steam which have done partial work is extracted from an steam turbine and used as a drying medium, moisture contained in the coal powder is evaporated with sensible heat and latent heat of the superheated steam, water resulted from the condensation of the superheated steam is fed into a deaerator of the steam turbine via a condensate pump for recirculation. The present invention has advantages of reducing coal consumption and saving coal, recovering residual heat, reducing emission of carbon dioxide and adopting to the national industrial policy on energy saving and emission reduction.