Vacuum Harrow Rake Dryer For Easily Oxidized/Explosive Material
vacuum rake dryer is a new type drying machine ,which is designed with the combination of oar blade dryer heat drying principle, with a higher drying efficiency, for a variety of raw materials.
The inner equipped oar blade and screw with continuous ,axial and radial mixing of raw materials ,make the materials to be dried more evenly.With applied both oar blade and screw, when the raw materials were turned over by mixing blades, they speed up the materials contact with heating surface of the dryer,so heat transfer rate is increased,and is conducive to moisture evaporation.
Product Structure
2.1 The loading cylinder of raw materials will be equipped with heating jacket,and heat insulation layer will be equipped outside the jacket,which will prevent the heat be transferred ,and also reduce the heat loss. Discharge hole is equipped with the lower part of the cylinder, on the top of the cylinder with two feeding holes and an air exhaust outlet.When feeding,the raw materials should be fed equally from the two feeding holes,the best feeding capacity is about 60%-80% of the volume of the cylinder,the max feeding capacity should not exceed 80%,otherwise will affect the smooth discharge of gas evaporation .When the sticky raw material is feeding,the feeding capacity should be reduced, to prevent the drive motor overloaded, damage to equipment.
2.2 Hollow shaft is set inside the center of of the cylinder,in heating medium will be put into the shaft( like hot conduction oil or hot water).
2.3 On the hollow shaft distributed with oar blades with certain angle,the oar blades are also hollow within heating transferred,inlet and outlet of hot oil conduction are equipped inside of the blades,to ensure the heat transfer efficiency during the drying
2.4 Seals: Packing seals are equipped during shaft and cylinder.
2.5 Transmission:Except the special models,we normally apply the chain or gear transmission style.Pivot bear apply duplex bearing combination ,with tapered roller bearing and deep groove ball bearing combined,to meeting the requirements of radial and axial force.
Product Structure Features
3.1 Compact structure,small occupied area.
3.2 High utilization of heat,low operation cost.
3.3 Wide adaptability of raw material,the drying degree is evenly.
3.4 Suitable for drying many kinds of raw meterials.
Product Application
1. Drying for below materials in pharmaceutical, food and chemical industry etc.
2. Suitable for thick liquid form, paste, powdery materials.
3. Temperature sensing materials requiring low temperature drying.
4. Explosive, strong stimulating, extremely poisonous substance, material that easy to oxidize.
5. Demand to retrieve the materials of the organic solvent.
Product Working Principle
HVRD Vacuum Harrow Dryer is a new type of intermittent vacuum drying equipment, wet material by conduction evaporation, with scraper agitator will remove material on hot surface, and move in the container to form a circulation flow of water evaporation by vacuum pump.
Technical Parameters
Item | type | ||||||||
Name(unit) | HVRD-500 | HVRD-750 | HVRD-1000 | HVRD-1500 | HVRD-2000 | HVRD-3000 | HVRD-5000 | HVRD-8000 | HVRD-10000 |
Working volume(L) | 300 | 450 | 600 | 900 | 1200 | 1800 | 3000 | 4800 | 6000 |
Size in the cylinder(mm) | Ø600x1500 | Ø800x1500 | Ø800x2000 | Ø1000x2000 | Ø1000x2600 | Ø1200x2600 | Ø1400x3400 | Ø1600x4500 | Ø1800x4500 |
Stirring revolution(rpm) | 10-15 | 10 | 8-10 | 5 | 5 | 5 | |||
Power(kw) | 3 | 4 | 5.5 | 5.5 | 7.5 | 11 | 15 | 22 | 30 |
Design pressure of jacket(Mpa) | <0.3 | ||||||||
Pressure in the cylinder(Mpa) | -0.09~-0.096 | ||||||||
Heat transfer area(m2) | 2.4+1 | 3.2+1.2 | 4.5+1.5 | 5.6+1.8 | 7.5+2.2 | 9+2.5 | 14+3.5 | 21.6+5.5 | 24.3+5.5 |
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