System for drying coal by using superheated steam

Abstract

The present disclosure relates to a coal drying system for removing water contained in coal used as a fuel of a thermoelectric power plant with superheated steam. The system prevents the incomplete combustion of the coal by removing water existing inside and outside the coal fuel of the thermoelectric power plane, thereby improving a heating value of coal and minimizing the discharge of pollutants, prevents the corrosion of the system and improves the durability, and increases the use of low-quality coal of which the demand is low, thereby improving the stable supply of the coal.

Description

technical field [0001] The present invention relates to a system for drying coal using superheated steam, and more particularly, to a coal drying system for removing moisture contained in coal used as fuel for thermal power plants using superheated steam. Background technique [0002] Generally, a thermal power plant using coal as fuel to generate energy burns about 180 ton / hr of coal to generate 500 MW of electricity, and a coal mill supplies about 37 tons of coal to a boiler. Six coal storage rooms with a capacity of approximately 500 tons are installed in a thermal power plant of 500 MW, and five of them supply coal on a regular basis, and one storage room is used as a coal storage room for storing reserved coal in a predetermined time. [0003] Further, it needs to be pointed out that thermal power plants using coal as fuel to generate electric energy use 6080Kcal / Kg low-moisture bituminous coal, which is 10% or less than the standard energy design basis of coal. Some t...

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Problems solved by technology

Internationally, power generation tends to depend on stable oil prices and the current low cost of nuclear power generation, but now the sharp rise in oil prices and anxiety about nuclear power will lead to increased construction plans for thermal power plants using coal

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