Sludge Dryer
Description
Working Principle
Advantages
Description
The paddle type sludge dryer consists of two blade shafts that are in
mesh with each other, a W-shaped casing with a jacket, a machine base
and a transmission part. The dryer uses steam, hot water or heat
transfer oil as the heating medium, The entire drying process of the sludge is carried out in a closed state, and the organic volatile and odorous gas is sent to the sealed exhaust gas treatment device to avoid environmental pollution.
Working Principle
Principle of Paddle Type Sludge Dryer
The dryer uses steam, hot water or heat transfer oil as the heating medium, and the shaft end is equipped with a rotary joint for introducing and exporting the heat medium.The heating medium is divided into two paths, respectively entering the jacket of the dryer casing and the inner cavity of the blade shaft, heating the body and the blade shaft at the same time, and heating and drying the sludge by conduction heating.
The dried sludge is continuously fed into the dryer feeding port by the screw feeder. After the sludge enters the body, the sludge is turned over and stirred by the rotation of the blade, and the heating interface is continuously updated to contact the body and the blade. It is heated sufficiently to evaporate the surface moisture contained in the sludge. At the same time, the sludge is conveyed in the direction of the discharge port with the rotation of the blade shaft in a spiral path, and the stirring is continued during the transportation, so that the water oozing out from the sludge continues to evaporate. Finally, a dry, uniform, acceptable product is discharged from the discharge port.
Advantages
- Low Energy Consumption :
Due to indirect heating, there is no large amount of air to take away heat, and the outer wall of the dryer is set with insulation layer, For Slurry materials ,evaporate of 1kg water requires only 1.2kg water vapor. - Low Area Required :
There is a huge heat transfer surface in the unit effective volume, which reduces the processing time and equipment size. Greatly reduce the construction area and building space - Wide Range Of Materials :
Different thermal media are used to deal with both heat- sensitive materials and materials requiring high-temperature treatment. Common media are: steam, heat conduction oil, hot water, cooling water, etc. Can operate continuously or intermittently, can be used in many fields - Low Environmental Pollution :
Small wear and tear, very low maintenance costs. - Stable Operation :
Due to the special compression-expansion stirring function of wedge blade, the material particles are fully in contact with the heat transfer surface. Within the axial range , the temperature, humidity and mixing degree gradient of the material is very small, thus ensuring the stability of the process. - Wedge blade has self-cleaning ability, which can improve blade conduction.
