Disc Dryer

Disc DryerWorking principle and process

Wet materials are continuously added to the feeding hopper of the main machine. The upper electric vacuum ball valve is opened to distribute the materials alternately into the top two material tanks. The vacuum ball valves on the upper and lower parts of the material tanks are alternately opened and closed. The materials are continuously added to the first layer of the drying disc on the upper part of the dryer under the action of the mixing motor. The rake arm with rake blades rotates to make the rake blades continuously flip the materials, allowing the materials to fully absorb heat. The materials flow along the exponential spiral line on the surface of the drying disc. The materials on the small drying disc are transferred to the outer edge and fall to the outer edge of the large drying disc below. The materials on the large drying disc move inward and fall into the lower small drying disc from the middle discharge port. The large and small drying discs are alternately arranged up and down, and the materials can continuously flow through the entire dryer. Insert heating medium into the hollow drying tray. The heating medium enters the drying disc from one end and exits from the other end. The dried material falls from the last layer of the drying tray onto the cooled bottom layer of the shell, and is then transferred by the rake blade to the discharge port to be discharged from the bottom two material tanks, and discharged through the upper and lower electric vacuum ball valves with alternating switches. The moisture evaporates and evaporates from the material, and is forcibly extracted by a vacuum pump from the upper and lower material tanks. The solvent is condensed by a condenser and enters the buffer tank for recovery, and the moisture is discharged into the air.

Disc DryerSuitable materials:

The closed recovery solvent disc continuous dryer process is suitable for drying processes that require solvent recovery and drying processes where the moisture content is flammable, explosive, toxic substances that cannot be directly discharged into the atmosphere and must be recycled. If the moisture content is methanol, ethanol, gasoline, pyridine, petroleum ether, halogenated hydrocarbons, acetone, formaldehyde, etc. On the basis of the basic configuration, add continuous material entry and exit locks, condensers, solvent receiving tanks, and vacuum pumps. The moisture (solvent vapor) escaping from the dryer enters the solvent recovery condenser from the top of the dryer, condenses into solvent liquid under the cooling of the cooling medium, and enters the solvent receiving tank. Non condensable gases leave the solvent receiving tank and are evacuated by a vacuum pump. The cooling medium should be selected based on the characteristics of the solvent, either cooling water or cold salt water.

1 Wet material 2 Quantitative feeder 3 Continuous ball valve feeding 4 Vacuum disc drying 5 Condenser 6 Heating medium in 7 Heating medium out 8 Solvent receiver 9 Vacuum pump 10 Dry product 11 Cooling medium in 12 Cooling medium in 13 Exhaust gas exhaust