Plate Dryer for Chemical Industry Continuous Disc Dryer

Description of PLG Continuous Disc Dryer:

PLG Continuous Plate Dryer is appropriate for drying, calcining, pyrolysis, cooling, reaction and sublimation in the chemical, pharmaceutical, new energy, pesticide, food and agricultural industries.

Wet materials are continuously fed into the first layer drying plate on the top of the dryer. They will be turned and stirred by the rakes whose arms make rotational motion. The materials flow through the surface of the drying plate along the index spiral line. On the small plate the materials will move to the outer edge and drop down to the large drying plate. On the big one they will move inward and drop to the small plate on the next layer from the central hole. Both small and large drying plates are arranged alternately so that the materials can get through the whole continuous plate dryer. The heating media will be led into the hollow drying plate. The heating media includes saturated steam, hot water and conduction oil, and it will enter from one end and derive from the other end. The dried materials will drop from the last layer of the drying plate to the bottom layer of the shell. Finally, they will be transferred to the discharge port by the rakes. The moisture escapes from materials and will be expelled from the wet discharge port on the top cover. The moisture of vacuum type Drying Machine will be drawn out by the vacuum pump. Drying pasty and heat sensitive materials, this continuous plate dryer can recover the solvent and conduct pyrolysis and reaction operation.

Structure description of PLG continuous Disc Dryer:

1. Drying disc
- Designing pressure: generally 0.4Mpa, and the max. pressure is 1.6 MPa.
- Max. working pressure: generally ≤0.4Mpa, and the max. pressure is 1.6 MPa.
- Heat source: steam, hot water, or thermal oil: Use hot water as heat source when the drying plates' temperature is 100°C; Use saturated water steam ≤0.4Mpa or steam-gas when the drying plates' temperature is 100°C~150°C; Use thermal oil when the drying plates' temperature is 150°C~320°C;

2. Material Transmission System
- Revolution of main shaft: 1~10 rpm, electromagnetism or transducer timing.
- Rake arm: 2 to 8 rake arms will be fixed on the main shaft on the every layer.
- Rake blade: the rake blades are hinged to the rake arms and float with the surface of the plate. There're several types of rake blades.
- Roller: For the material that is easy to agglomerate, or required to be grinded, the rollers shall be placed at the appropriate place to reinforce the heat transfer and drying process.

3. Three types of dryer body: normal pressure, sealed, and vacuum
- Normal pressure: The dryer body is cylindrical or octagonal and the structure can be integrated or separated. The ducting system for the heat source can be placed inside or outside of the dryer.
- Sealed: The dryer body is cylindrical and it can bear the interior pressure of 5KPa. The ducting system for the heat source can be placed inside or outside of the dryer.
- Vacuum: The dryer body is cylindrical and the design pressure is 0.1MPa. The ducting system for the heat source is placed inside of the dryer.

4. Air Heater
The air heater is usually used to meet larger evaporation capacity requirements in order to increase drying efficiency.

Parameters of PLG continuous disc dryer: