Lignite generally has the disadvantages of high humidity (30%-50%), low ignition point and large carbon dioxide emissions. The direct combustion of the non-extraction lignite raw coal, will bring serious problems of high environmental pollution, and increase the cost of plant installation and operation. Besides, higher water content leads to transportation cost increasing.

 

To solve the above problems of lignite properties, Zhengzhou Dongding Drying Equipment Co., Ltd. developed of a new lignite drying system, DDHG series lignite coal rotary dryer of high-efficiency drum drying technology. Our technical personnels take full account of the characteristics of lignite, design the special internal structure of the cylinder, which further strengthens the anti-breakage of the unity block material, not only improving the thermal efficiency, but also effectively avoiding the excessive drying phenomenon of coal in the cylinder. Through the drying and dehydration treatment of lignite, the system can effectively improve the calorific index and storage performance of lignite, so that the indexes meet the requirements of commodity power coal, and have obvious economic, environmental and social benefits.