Chinese factory vacuum sludge hollow paddle dryer

JYG sludge/sewage sludge paddle dryer 

I. Product introduction   

Descriptions of Hollow Paddle Dryer for sludge/sewage sludge 

Applicable for drying or cooling of paste, particle, powder and slurry state of material, perform the process of drying, cooling, heating, sterilizing, reacting and combustion under low temperature. The special stirring and heating transferring blade, makes high heat transferring efficiency, and provide self-cleaning function. The special chock shaped stirring and heat transferring blade has high heating efficiency and self-cleaning function of the heating transferring surface.

Hollow chock shaped blades are concentrated on the hollow shaft. Heat media flow through the blade from the hollow shaft. The heat transferring area in the effective volume is very high. The temperature range of heating media is -40 ℃ to 320 ℃. It might be steam, or liquid state, such as steam, thermal oil etc. Indirect heating, there's no heat carried out by air. All heat is utilized for to drying the material except the lost of heat insulation layers. The surface of chock shaped blade has self-cleaning function. The relative movements of the product particles and the chocked shaped surface might clean the material attached to the chock shaped surface, so to keep the cleanliness of heat transferring surface during working. The shell of hollow blade dryer is Ω shape. 2 or 4 pieces of hollow stirring shaft are usually equipped in the shell. To avoid any leakage of material, there're sealed terminal cover and top cover with the shell. The heat transferring media flow through the rotation connector, jacket's shell and hollow stirring shaft. To ensure best transferring effect, the hollow stirring shaft adopts different interior structure in accordance with different heating media.

Features of Hollow Paddle Dryer for sludge/sewage sludge

1. The heat consumption of blade is low:

Due to adopting indirect heating method, there will not be large amount of heat energy being taken away, besides there is additionally heat-insulation outside of heating drum body, therefore for paste materials, it only consume 1.2 kgs of steam to evaporate 1.0 kg of moisture inside the raw material.

2. The cost of the blade dryer is low:

For unit effective volume, there is a vast heat-convection area, thus it will shortens the processing duration, and also facilitates to reduce equipment’s sizes, in the end the construction area and space is greatly decreased.

3. The range of material to be processed is wide:

It can apply different heating medium, thus it can not only process heat-sensitive material but also material to be processed under high temperature. The commonly applicable heat medium is as: steam, thermal oil, hot water, cooling water and etc. It can not only run continuously but also intermittently in many process fields.

4. The pollution is less:

There is much less dust material being carried or emitted out to environment. There is also much less material solvent being evaporated, which is easy to be processed. For processing conditions such as there is contaminated material or there is solvent to be recovered, the close-circuit circulation mechanism can be adopted.

5. The operation cost is low:

By adopting low-speed stirring mechanism and reasonable structure and less wear allowance, the maintenance cost is also very low.

6. Steady operation:  

Due to the special compression-expansion stirring function of V-shaped blade, it makes it possible to get material granule contact with heat-transferring surfaces fully, thus within the axial inter-zones, the material temperature, humidity and mixing gradient is very small, which can guarantee process stability.

Applications of Hollow Paddle Dryer for sludge/sewage sludge

The paddle dryer is successfully applied in foodstuff, chemical, petrochemical, dyestuff, and industrial mud etc.

II. Technical parameters of Hollow Paddle Dryer for sludge/sewage sludge