Characteristics of ZPG series rake vacuum dryers:
This machine adopts the heating method of interlayer and inner mixing at the same time. The heat transfer surface is large and the heat efficiency is high.
The machine is equipped with stirring, so that the material in the form of a continuous cycle state, further improve the uniformity of material heating.
The machine is equipped with stirring so as to dry the slurry, paste and paste material smoothly.
This machine adopts the mechanical seal, and can control the vacuum of the equipment well.
ZPG vacuum harrow dryer is suitable for the drying of the following materials in medicine, food and chemical industries:
1, suitable for paste, paste, powder material;
2, dry at low temperature and heat sensitive materials;
3, easy oxidation, explosive, strong stimulation, highly toxic materials;
4. Materials that require the recovery of organic solvents.
ZPG series rake vacuum drying machine is mainly composed of a casing, the rotating shaft and tooth form. Unlike the paddle dryer, rake vacuum dryer rotary shaft and the tooth is not as a heating surface, it only as a stir material and update the surface effect. By vacuum rake dryer operation, first wet material into the dryer, the jacket of the heating medium (usually steam or hot water, thermal oil, can also be used) and then start the vacuum pump to reach the required degree of vacuum, start stirring device, the rake and reverse rotation, the material in the drying process in continuously to the middle and ends at the same time, push the rake teeth can according to user requirements for 4 stainless steel bar (seamless steel tube), it through the rotation of the shaft to move up and down in the material on the wall vibration and caking material crushing will bond. Through these measures, the heat transfer surface can be updated in time, thus accelerating the rate of heat and mass transfer. When the material is dry to the specified moisture, stop heating, close the vacuum system, remove the dry material and complete a cycle operation.
This dryer is suitable for pulpiness, paste, granular and fibrous material drying, especially for heat sensitive materials and drying operation requirements of organic vapor recovery. Vacuum rake dryer has many advantages. Vacuum rake dryer has left and right to rake in two forms, whether left or right to have to profile and blade type two. When installed, the adjacent tooth difference between 90 degrees and then installed at both ends of the spindle shaped, the blade tooth type installation. When the main shaft rotates, the material moves on both sides under the action of the stirring shaft, and then moves to the middle, so as to ensure that the material is in a uniform mixing state during the whole drying process. Rake vacuum drying machine commonly used drying medium is generally 0.1-0.3Mpa steam, oil or water, the dryer vacuum was 50-90kPa, the material filling rate is 30%--80%, the thermal efficiency is 70%--80%. spindle speed 6-30rpm stepless speed regulation.