Atmospheric pressure disc dryers and vacuum disc dryers have shortcomings
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Keywords：Atmospheric pressure disc dryers and vacuum disc dryers have shortcomings
Pressure disc dryer equipment features:
The wet material is continuously fed from the feeder to the first drying plate in the upper part of the dryer, and the raking arm with the rake leaves makes the rake move the material continuously. The material traverses the surface of the drying plate along the index helix, the material on the small drying plate is transferred to the outer rim and falls to the outer rim of the large drying plate at the outer edge, moving inwards and out of the middle on the large drying tower Feeding mouth into the next layer of small dry plate. The size of the drying plate alternately arranged up and down, the material can be continuously flowing through the entire dryer. The hollow drying plate is provided with a heating medium which is saturated with steam, hot water and heat conducting oil. The heating medium enters from one end of the drying plate and is led out from the other end. Dried material has been dried from the last layer fell to the bottom of the shell, and finally was rake leaves transferred to the discharge port. Wet out from the material. Exhaust air is discharged from a wet-out port provided in the top cover, and the moisture in the vacuum-type tray drier is drawn out by a vacuum pump provided in the top cover. Dry material discharged from the bottom can be packaged directly. With the addition of finned heaters, bag filters, dry mixback wood structure, induced draft fan and other auxiliary machines, can increase its dry production capacity, dry paste and heat-sensitive materials can be easily recovered solvent, and can Perform pyrolysis and reaction operations。
Vacuum tray dryer equipment features
After the wet material is continuously added to the hopper of the host machine and the upper electric vacuum ball valve is opened, the material is distributed to the top two hoppers in turn. The vacuum ball valve on the upper and lower parts of the hopper is switched on and off. The materials are continuously added to the upper part of the drier under the action of the stirring motor A layer of dry plate, rake arm with rake leaves make rotary motion so that the rake leaf continuous material, so that the material fully absorb heat, the material flows along the index spiral line on the surface of the drying plate, the material on the small drying plate was Transferred to the outer edge, and fell to the outer edge of the outer edge of the large dry disk, the material on the large dry plate to move inside and from the middle of the discharge port into the lower small dry plate, the size of the dry plate alternately arranged up and down, The continuous flow of material through the entire dryer, the hollow drying plate into the heating medium. Heating medium from one end of the dry disk into the dry disk, derived from the other end. Dried material from the last layer of drying plate fell to the shell with the cooling floor, and finally rake leaves transferred to the discharge port discharge two tanks at the bottom, and by the upper and lower electric vacuum valve rotation switch discharge. The moisture evaporates and evaporates from the material and escapes. The material is forcibly extracted by the vacuum pump in the material tank arranged at the upper part and the lower part. The solvent is condensed into the buffer tank through the condenser for recovery, and the moisture is finally discharged.
The material enters the hopper 1, the pneumatic ball valves a and d are opened at the same time, the material in the hopper 1 enters into the hopper 1, and the material in the hopper 2 enters the drier under the action of the stirring device , The pneumatic ball valve a and d are closed at the same time, the pneumatic ball valves b and c are opened at the same time, the material in the hopper 2 enters into the feed transition silo 2, meanwhile, the material in the transitional silo 1 enters the dryness under the action of the stirring device Machine, so repeatedly, wet material into the dryer on the top of the drying plate.
The dried material enters the inlet of the pneumatic ball valve e under the action of the rake knife, the pneumatic ball valve e and h are opened at the same time, the dry material enters the discharging hopper 1, the material in the discharging hopper 2 passes through the pneumatic ball valve h Dryer, the same, the dried material under the action of the razor into the pneumatic ball valve g imports, pneumatic ball valve g and f at the same time open, dry material into the discharge hopper 2, the discharge material within the hopper 1 Through the pneumatic ball valve h out to the dryer, so repeatedly, dry material out to the dryer outside the package.
Vacuum disc dryer and atmospheric disc dryer summary, atmospheric pressure disc dryer is less than the recovery rate of solvent in the dry solvent is not high, the use of select dry solvent material had to choose a vacuum tray dryer, because the solvent Of the boiling point is not high so the solvent in the vacuum state is very easy to volatilize out of the vacuum tray dryer is less than the dry water-containing materials, the evaporation intensity is not as good as normal pressure disc dryer, the water vaporization temperature is high pressure Plate dryer simple and rapid heating, and equipment investment in atmospheric pressure disc dryer is low, dry or dry material selection of atmospheric pressure disc dryer is better.