The Lignite is an important energy and chemical raw materials, but because of high moisture lignite (20% -55%), low calorific value (2700 kcal or so), spontaneous combustion etc. characteristics, resulting in lower selling prices, sales radius is limited, so more and more development and utilization of lignite domestic and foreign governments and research institutions attention.
Lignite coal dryer ,is also used for drying coal slurry, on the condition of ensuring the lignite quality fixed , adopt low-temperature and four grades drying process, to evaporatethe mosture of lignite lower than 13%.The first drying area in the high humidity status ,remove most of moisture through 400 ℃, to make sure the chemical composition of the lignite no change and no easy to burn;The temperature of the second area is 300℃, Lignite coal dryer to remove the moisture by middle temperature induing air, to ensure lignite no coking;The temperature of the third area is 120℃-210℃,use the crushing device in the rotary body,repeatly crushing, scatterthe material,down-flowdrying;The forth drying area is high exhausting area,temperature is 60℃-80℃,Lignite coal dryer remove moisture by low temperature and hot air which produced through the inducing air system .

The performance and features of lignite dryer

Lignite rotary dryer researched and developed by us is a new technology to dry lignite, has the following characteristics
1.Grasping the best entering temperature and discharging temperature to dry the lignite;
2.Studying the form of lifting plate for drying lignite;
3.Lignite coal dryer Determine the evaporation strength to dry lignite;
4.Grasping the lignite drying and volatile loss situation;
5.Researching the grain-size influence for the lignite drying effects;
6.Studying the broken degree during the lignite drying process;
7.Researching get damp characteristics after lignite drying;

Besides, when using rotary dryer (dryer) in the process of baking or drying lignite, we must apply the following principles:

1. Anaerobicly drying lignite;
2. Strict feeding and discharging systems;
3. Suitable rotary dryer inclination and adjustable rotary dryer speed;
4. Scientific collecting and desulfurization technology;
5. Efficient piping design and insulation installations;
6. Fully automatic control and alarm device.

We should not only achieve the above points but also a strict production management system. Only when we manage to do those requirements, can rotary lignite dryer reach safe and efficient operation, environmental protection and fully automatic control.