Introduction of sludge dryer:

1. Sludge dryer is a kind of highly efficient, stable and reliable heating drying equipment.
2. And its performance is better than tube bundle rotary dryer, blade rotary dryer.
3. Drying machine adopts "center-adjusting roller device", making the cooperation of roller and rolling ring always show linear contact which greatly reduces the wear and power consumption.
4. This machinery is applied in the materials like coal slurry, mud, felted gypsum, Muddy, high-moisture swell soil, electroplate mud and so on.
 

Features
The feeding end is equipped with screw guide plates and scraper which can make sure the feed is table and smooth.
The special designed screw paddles at the feeding end and fixed bevel paddles can well disintegrate and stir up the material to enhance the heat transfer coefficient.
Huge drying process capacity and easy loading and discharging. The special designed belt conveyer and screw discharger are equipped.
Supporting wheel and positioning wheel are automatically adjustable to make sure the contact between the rotating cylinder and supporting wheels are line contact. This design can reduce the abrasion and extend the lifespan of the gear box. 
The rotating speed of the cylinder is adjustable which can make this dryer suitable for different wet material.


Working Principle of Rotary Sludge Dryer
 
Material to be dried enters the dryer, and as the dryer rotates, the material is lifted up by a series of internal fins lining the inner wall of the dryer.
When the material gets high enough to roll back off the fins, it falls back down to the bottom of the dryer, passing through the hot gas stream as it falls.
This gas stream can either be moving toward the discharge end from the feed end (known as co-current flow), or toward the feed end from the discharge end (known as counter-current flow).
 The gas stream can be made up of a mixture of air and combustion gases from a burner, in which case the dryer is called a direct heated dryer.
Alternatively, the gas stream may consist of air or another (sometimes inert) gas that is preheated. When the gas stream is preheated by some means where burner combustion gases do not enter the dryer, the dryer known as an indirect-heated type.
Often, indirect heated dryers are used when product contamination is a concern.