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    Avalon Separation

    Paddle Dryers

    Paddle dryer is an indirect conduction heating type drying device, which is suitable for processing materials with good thermal stability such as paste, powder and granular. After special configuration, it can be used for processing heat sensitive materials, materials that need recover solvents during drying process and materials that need to be dried under rough vacuum. At the same time, paddle dryer can also be used for cooling of powder and granular materials and cooling and crystallization of some special materials by injecting cooling medium. It also can inject heating medium for heating materials and reactor to be heated.

    Working Principle

    In the jacket shell body of paddle dryer there are two parallel shafts which have interleaved paddles. Each shaft has several hollow fan-shaped paddles which interleave with a certain spacing. There are two kinds of paddles: feed shear plane and return shear plane, the shaft rotates at low speed. A heating medium enters the hollow rotary shafts and paddles through a universal revolving joint. After heat transfer and drying, it is discharged through the revolving joint. The material is continuously fed into the equipment, next it is agitated and mixed near the paddles. At the same time, the material is gradually dried by the heat conduction of paddle and jacket. The height of overflow weir can be changed to adjust residence time. In addition, steam produced in the drying process is discharged through the escape hole with trace amount of air.


    • It adopts conduction type of heat transfer, the heat transfer efficiency is high.
    • The self-cleaning function of the heat transfer surface is good.
    • The product quality is stable.
    • The material loss is small, the product recovery rate is high.
    • The material adaptability is broad, the product is dried evenly.
    • It can combine drying and cooling together.
    • The equipment with compact structure occupies small area.
    • The design is unique, and maintenance of the equipment is easy.

    Specification Heat Transfer Area(m2) Water Evaporation Quantity(kg/h) Effective Volume(m3) Installed Power(kw) Speed (r/min) Dimensions
    L W H
    CD250 6.2 30~60 0.25 2.2 5~15 4300 720 900
    CD400 14 70~140 0.94 11 5400 1050 1260
    CD600 30 150~300 2 22 7200 1300 1800
    CD800 70 350~700 5.1 45 9900 1840 2300
    CD900 90 450~900 7.4 55 11000 1920 2290
    CD1000 110 550~1100 10.5 90 12500 2050 2700
    CD1200 150 750~1500 15 110 13200 2450 3200
    CD1400 190 950~1900 20.5 110 14500 2710 3630

    Applicable Materials

    Widely used in chemical, mining, metallurgical and other industries, such as ore, gypsum, coal, metal powder, diatomaceous earth, kaolin, and various of sludge drying, municipal sludge, paper sludge and other drying.

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