Lignite often referred to as brown coal, is a soft, brown, combustible sedimentary rock formed from naturally compressed peat. It has a low carbon content, and when removed from the ground, it contains a very high amount of moisture. Lignite has a high content of volatile matter, its high moisture content and susceptibility to spontaneous combustion can cause problems in transportation and storage. Therefore, lignite must be processed before it can be used.
The drying of the lignite coals decreases the problems caused by the high moisture content. This reduces the burden on the coal handling system, conveyers and crushers. Also, since dried coal is easier to convey, this reduces maintenance costs and increases availability of the coal handling system. Removal of moisture from the lignite coals improves the CV which results into reduction of pollutants. Reduction of the moisture content also reduces energy consumption in the grinding mills, lowers the loss of heat with flue gases, reduces transportation costs while increasing the combustion efficiency, safety, and reducing the amount of exhaust gases.
Lignite dryer is a key equipment to reduce the moisture content of lignite and increase the calorific value. After many tests and technical research, Zhengzhou Jiutian has successfully developed equipment for lignite drying and lignite quality improvement. Our lignite dryer can reduce the moisture content of lignite from 25-60% to 15-30%, and the calorific value of the treated coal can reach 30-80%, which can be directly used as a substitute for thermal coal, bituminous coal and anthracite in power plants. For more detailed information about the equipment, please contact us.
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