Product Outline
NPD is a dryer that is used for various fields of materials such as resin, sludge, food, chemicals, etc. The most remarkable point is in the wedge shape of the heat exchanging paddles, which is developed by NARA. NPD is used by various customers in all over the world as a leading dryer in this field.
Features
Dryer size is minimized, due to the large heat transfer area per volume.
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.
Since two shafts overlap each other, it prevents the adhesion of powder on the paddle wings, therefore keeping a good heat transfer.
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.
Slurry with high moisture content or materials with high viscosity can be treated.
Available under the vacuumed condition as well, for materials which are sensitive to high temperatures.
By using oil for the heat medium, it is possible to use high temperature up to 290 ℃.
Application Examples
Operation
Drying, Solvent recovery, Heating, Sterilization, Reaction, Cooling, Vacuum drying, etc.
Material
Wide range of particle size and shapes such as fine particles, granules, pellet, flakes.
Also, available for the material with high moisture content, slurry, and high viscosity.