Lignite Dryer

Introduction to Lignite Dryer

Lignite dryer machine is a kind of rotary equipment for dewatering lignite coal. Lignite dryer is also called brown coal dryer and wood coal drying machine, which can realize continuous, industrial and automatic operation. It is designed specially targeted at lignite characteristics. Fote lignite dryer was born with aim to meet environmental legislation and customers' need.

To guarantee the quality of lignite and coal slime unchanged after the drying process, Fote engineers keep researching and have developed advanced lignite drying technology. Fote focuses on controlling the scorching wind temperature and rotating speed to reach higher drying efficiency. Lignite coal dryer machine can dewater the coal slime to the moisture content below 13%, and improve the combustion efficiency.

Why Dry Lignite?

Lignite is a kind of mineral coal with minimum coalification degree. Because it is rich in volatile elements, it is easy to be burnt and generate smoke. Besides, lignite contains about 6-19% ash, which makes it pollute the environment a lot when burning. Therefore, washing process is needed to improve the purity.

In addition to this physical characteristic, it is of high moisture and easy to self-ignite, which is a big issue for storage and transportation. Sometimes, good coal cannot meet the fuel requirement, for which lignite is in large demand as an alternative.

In view of the above, lignite drying machine is born and become requisite. Dried lignite is mainly used in thermal power plant, chemical industry, metal recycling as well as catalyst supports, adsorbents, sewage purification etc. And the lignite dryer machine can also be used for drying fly ash, coke, coal as well as other granular, paste and powder materials.

Fote Lignite Dryer

Applications of Lignite Rotary Dryer

• Coal slime, raw coal, any kinds of fine coal in coal industry;
• Iron powder, copper powder, zinc powder and any other metal granular materials in ore processing and mining;
• Clay, limestone, sand, silica/quartz sand, bentonite, slag, etc. in building materials
• Non-thermal sensitive materials in metallurgy;
• Other kinds of powder and particle that need to be dried specially.

Liginite Dryer Application

How Lignite Dryer Works?

Lignite Dryer adopts the new technology of drying after crushing, which realizes the industrialization, automation and continuous production.  When the lignite dryer machine works, wet lignite is fed into the crushing equipment firstly. Then low-temperature four-stage drying process is introduced and dries the wet lignite to the humidity of 13% or below. 

Working Principle of Lignite Dryer

Structural Functions of the Four Drying Stages of Lignite Dryer

First Level: 400 ℃, high temperature removes most of the moisture and make sure the lignite not change chemically;

Second Level: 300 ℃, strong wind produced works in high efficiency to ensure that the lignite is not coking;

Third Level: 120-210℃, with the crushing function of the cleaning devices inside the cylinder, wet lignite flows in the cylinder and is dried;

Fourth Level: 60-80℃, the removal of water depends on low-temperature current produced by the induced draft system.

Advantages of Fote Lignite Drying Machine

• The realization of zero horizontal thrust reduces the bearing of the retaining wheels, so the cylinder rolls stably and reliably;
• High anti-overload capacity of the lignite dryer bears a large production capacity. As a result, the fuel and the cost are saved;
• New structure helps to strengthen the cleaning of lignite and heat transformation, which erases the sticky slime on the inner wall.

Therefore, lignite dryer can take full advantage of the coal resources and reduce the emission concentration, so as to achieve energy-saving emission reduction and environmental protection objectives.

Typical Case of Coal Drum Dryer

As for the wide application and structural advantages, Fote lignite dryer is popular with many countries. So far, Fote lignite dryers have been exported to over 200 countries like Indonesia, Brazil, Turkey, Canada, Russia, etc. Here introduces a case for your reference. In 2017, a lignite plant owner left an online message when he searched coal dryer and found our web. Fote engineer supplied him a solution within his budget according to the details he left. After two-week delivery and Fote engineers' on-site guidance, this lignite dryer has worked well since the installation.

Lignite Dryers at Customer Sites

Lignite Dryer Manufacturer

Fote Machinery, as one of the most professional mining machine suppliers in China, has established its own production series for its 40-year research and development. Since 1982, Fote has built a good and reliable relationship with diverse famous universities like Zhejiang University, Tsinghua University, etc. More than 360 professional engineers are ready to offer you free and customized solutions 7X24 hours. You can chat online with them or leave an online message for more details like lignite dryer price, solutions as well as the flow chart.

General Specification