Paddle Dryer/Drying Machine

Basic Info

Model NO.	GGSG-20
Drying Medium	Effluent Gas
Operational Method	Continuous
Type	Double Cone Rotating
Origin	China

Product Description

Paddle dryer
Product description:Paddle dryer is an indirect -heating drying equipment, it is suitable to dry good stable materials such as paste, powder, granule and sludge. It is capable of drying material with high moisture and high viscosity. It is characterized by the hollow rotating shafts and the hollow jacket. Copper oxide sludge is a kind of black cake type which is a bit sticky. We copper sludge is fed into the dryer through a screw feeder, and then is heated in the drying chamber in a high heating efficiency. Dry sludge is very fine powder and discharged through the airlock valve under the dryer. Evaporated moisture is taken out of the paddle dryer for dust collection in a bag filter.

Applications:

1. For drying or cooling powder, small granule, filter cake and slurry materials; particularly good at drying sticky heat sensitive slurry materials continuously.
2. Heating area: 1-200m2
3. The drying chamber can be vacuum and normal pressure.
4. Heat supply can be steam, hot water and hot oil.

Features:

1. Dryer size is minimized, due to the large heat transfer area per volume.
2. The wedge shaped paddles goes into the powder to enhance contact to the heat transfer area, and the heat transfer coefficient is relatively high due to the good mixing. So, high heating factor can be obtained. Also, the fullness of the materials is high as 80-90%, therefore large heat transfer area can be efficiently used.
3. Since two shafts overlap each other, it prevents the adhesion of powder on the paddle wings, therefore keeping a good heat transfer.
4. The residence time distribution is sharp and the powder is uniformly dried.Since the required carrier gas amount is small, the exhaust gas treatment system can also be minimized. This is a big advantage, especially for the closed system with inert gas circulation for solvent recovery.
5. Slurry with high moisture content or materials with high viscosity can be treated.Available underthe vacuumed condition as well, for materials which are sensitive to high temperatures.
6. By using oil for the heat medium, it is possible to use high temperature up to 290ºC.
7. Drying and cooling can be done in one unit.

Technical advantages:

1. High heat efficiency: The drying chamber is insulated by 50mm mineral wool and there is very little heat loss via the exhaust gas. The heat efficiency can reach 90%.
2. Uniform drying: The specially designed wedge-shaped paddle can completely mix and stir the wet material to achieve very uniform heating. So the drying is very uniform.
3. Continuous operation: Thanks to pneumatic ball valves for feeding and discharging under vacuum condition and the rotating paddles which can push the material forward, the drying process can be automatically and continuously.
4. High evaporating rate: Under vacuum condition, the boiling point of moisture will be much lower as well as complete and uniform heat transfer, the evaporation rate is much higher than normal paddle dryer.
5. Compact size: The drying chamber is very compact in size. Only need small installation space.
6. Environment friendly: The evaporated moisture can be recovered by the condenser and buffer tank. The exhaust gas is from the vacuum pump is very little compared to normal dryer.

Operation Principles:

1. Atmospheric Drying Process:

1. Exhaust Blower 2. Precipitator 3. Mainframe 4. Air Filter 5. Heat Exchanger2, Solvent Recovery Drying Process 1. Mainframe 2. Precipitator 3. Condenser 4. Solvent Recovery Tank 5. Vacuum Pump 6. Vacuum Feeder Valve 7. Discharge Valve
Technical Parameters