Coal-fired boiler equipment, coal drying method in coal-fired boiler equipment

摘要

This coal-fired boiler equipment includes a coal dryer (11) for drying coal, a boiler (14) for mixing the coal dried by the coal dryer (11) with combustion air, and a boiler (14). An air heater (15) for heating combustion air supplied to the boiler (14) by combustion exhaust gas discharged from the exhaust gas, a dust collector (17) for collecting soot and dust contained in the combustion exhaust gas, and desulfurization treatment to the combustion exhaust gas And a heat recovery unit (16) for heating the heat medium with the combustion exhaust gas. The coal dryer (11) is configured to heat the heat medium heated by the heat recovery unit (16). Use energy to dry coal