Boiler Efficiency - an overview
11.5.1 Low-rank coal drying. Coal preparation for pulverized coal (PC) combustion always includes drying, which must be very intensive, especially if moist lignite is used. Lignite pulverization is aided by the presence of hot flue gases (with temperature up to 1000 °C), which are extracted from the boiler through recirculation ducting. The ...
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