COAL DRYING SYSTEM USING SECONDARILY SUPERHEATED STEAM Russian patent published in 2017 - IPC C10L9/08 C10B57/10 F26B19/00 F26B21/04 

FIELD: electricity-producing industry.

SUBSTANCE: invention relates to the coal drying system, which dehydrates the coal that is used in the capacity of the fuel material for the thermal power station. There is a device for coal drying, which dries the coal by dint of the superheated steam spraying from the superheater with the boiling bed and of the secondarily superheated steam spraying, which is generated in the secondary superheater. The coal drying system, more specifically the coal drying system using secondarily superheated steam, comprises: a coal storage, a coal grading device, a transport conveyer for coal transporting from the coal storage, a transport conveyer for coal fuel and a transport conveyer for the dryable coal, a storage container for the coal fuel, a superheater with the boiling bed for the coal fuel, which is stored in the coal storage container, combusting in the boiling bed with the superheated steam formation at a specific temperature, a device for coal drying, which dries the coal by dint of the spraying the superheated steam, which is generated in the superheater with the boiling bed, and the secondarily superheated steam in the secondary gaseous combustion products superheater, which generates the secondarily superheated steam by virtue of the gaseous combustion products that are formed in the superheater with the boiling bed, and with the use of the off-gas, which is generated after the coal drying in the device for coal drying.

EFFECT: invention should enhance the coal calorific capacitance with the upgrading of the fuel efficiency in the steam boiler furnace of the thermal power station and should decrease the fuel consumption.

8 cl, 2 dwg