PLG series disc continuous dryer

Working principle

The wet material is continuously added from the feeder to the first drying tray on the upper part of the dryer, and the rake arm with the raking blade makes a rotary movement, so that the rake arm continuously turns over the material. The material flows through the surface of the drying plate along the exponential spiral, the material on the small drying plate is moved to the outer edge, and the material on the large drying plate moves inward and falls into the next layer of small drying plate from the middle drop. Drying trays of different sizes are arranged alternately up and down, which prevents the material from flowing continuously through the dryer. A heating medium is introduced into the hollow drying tray. The heating medium is in the form of saturated steam, hot water, and thermal oil. The heating medium enters from one end of the drying tray and exits from the other end. The last layer of dried material clumps falls to the shell The bottom layer is finally moved to the discharge port by the rake leaves. Moisture vapor overflows from the material. It is discharged through the moisture discharge port provided on the top cover, and the moisture vapor of the vacuum-type disc dryer is extracted through the vacuum pump port provided on the top cover. The dry materials discharged from the bottom layer can be directly packed. By adding fin heater, solvent recovery condenser, bag filter, dry material remixing mechanism, induced draft fan and other auxiliary machines, the drying production capacity can be improved. Dry paste and heat-sensitive materials can be easily recovered Solvent, and can carry out pyrolysis and reaction operations.

Features

Drying tray

1. The design pressure is generally 0.4MPa and the maximum can reach 1.6MPa.

2. The highest working pressure: generally ≤0.4MPa, up to 1.6MPa.

3. Heating medium: steam, hot water, heat conduction oil, drying plate temperature 100 ℃, use hot water for heating. 100 ℃ -150 ℃ daily heating with saturated steam or superheated steam ≤0.4MPa. Heated with thermal oil at 150 ℃ -320 ℃.

Material transfer system

1. Spindle speed: 1-10 rpm, electromagnetic or variable frequency stepless speed regulation.

2. Rake arm: There are 2 ~ 8 rake arms fixed on the main shaft on each drying tray.

3. Harrow leaf: Articulated on the harrow arm, can keep up and down with the surface of the disk to maintain contact, there are many forms.

4. Rolling: For materials that are easy to agglomerate and need to be crushed, adding rolling at an appropriate position can strengthen the heat transfer and drying process.

Case

There are three types of normal pressure, airtight and vacuum

1. Atmospheric pressure type: cylinder or octagonal prism type, which has two structures: integral and split. The heating medium inlet and outlet main pipes can be inside or outside the casing.

2. Closed type: cylindrical shell, can withstand the internal pressure of 5Kpa, the main pipe of the heating medium inlet and outlet can be inside or outside the shell.

3. Vacuum type: Cylindrical shell, the design pressure is -0.096Mpa, and the main pipeline of heating medium inlet and outlet is in the shell.

Air heater

Generally, it is used when the induced draft fan is configured to prevent the moist air from entering the host and affecting the drying effect.

Technical Parameters