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  • JYG Hollow Blade Dryer
  • JYG Hollow Blade Dryer

JYG Hollow Blade Dryer

Key words:Hollow Blade Dryer,Blade Dryer
Description:Applicable for drying or cooling of paste, particle, powder and slurry state of material, perform the process of drying, cooling, heating, sterilizing, reacting and combustion under low temperature. The special stirring and heating…
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Dual counter-rotating shafts with unique intermeshing hollow wedge-shaped paddles produce intimate mixing, optimize heat transfer, and provide a self-cleaning feature. A large heat transfer area to volume ratio is achieved by the use of hollow paddles and a jacketed vessel, through which the heating medium flows. The result is an efficient, compact machine with less space requirements and lower installation cost.

The Hollow Paddle Dryer has a metal wall which separates the process mass from the heat source (steam or hot oil). High thermal efficiency is obtained because the heat from the thermal medium goes directly into the process mass. As the material comes into contact with the heated through and agitators, the process mass is heated via conduction. With an insulated dryer, very little heat is lost. To evaporate 1kg of water only requires about 1.2kg of steam for slurry materials. Exhaust gas is minimal and at a low temperature. Therefore, the volume of non-condensable gas from the dryer, which might require treatment, is minimal.

The dryer is an indirect heat transfer device which utilizes a high degree of mechanical agitation to enhance contact with the product being dried. Evaporation rates per square foot of heat transfer surface are maximized through self-cleaning paddles and the mixing effect. Movement of the process material between the slanting surfaces of the revolving wedge-shaped paddles generates shearing forces, which clean the paddle surfaces and maximize conductivity. Counter rotating shafts move the material away from the walls, cleaning the walls by means of the tab on each paddle. This results in higher heat transfer rates than disc or single shaft designs. The wedge-shaped paddles, and the intermeshing of the dual agitators, create a localized mixing effect around the paddle. This allows more individual particles in the bed to be exposed directly to the heat transfer surface, thereby increasing the heat transfer rate, allowing the use of smaller equipment.

HEAT SOURCES(Temperature at 180°C - 250°C)
Heating by Steam
Steamenters the hollow shaft through a rotary joint and is evenly distributed to all paddles. Condensate is removed with each revolution. Heating by Hot Oil (thermal fluid) Hot oil (thermal fluid) enters and exits the hollow shaft through a rotary joint. Pressure from the supply pump forces liquid through the hollow paddles.


Low Operation Cost
- Easy to operate
- Requires minimal attention
- Simple instruments monitor the process
- High efficiency
- Low off-gas volume

Low Installation Cost
- Designed with compact structure
- Small off-gas system
- Vertical shaft removal reduces building size requirements

Low Maintenance Cost
- Designed for high torque and low operating speed
- Simple durable design for easy and low maintenance
- No internal parts to adjust or maintain
- No metal to metal contact
- Shafts, pillow block bearings, and drive components are designed for long life under adverse conditions, insuring long term mechanical integrity
- Robust frame supports split pillow block bearings
- Grease-purged stuffing boxes. Alternate seal designs are available

Hollow Blade Dryer 



Item \ Model JYG3 JYG9 QJ13 JYG18 JYG29 JYG41 JYG52 JYG68 JYG81 JYG95 JYG110
heat transferring area (m2) 3 9 13 18 29 41 52 68 81 95 110
effective volume (m3) 0.06 0.32 0.59 1.09 1.85 2.8 3.96 5.21 6.43 8.07 9.46
range of rotating speed (rmp) 15-30 10-25 10-25 10-20 10-20 10-20 10-20 10-20 5-15 5-15 5-10
power (kw) 2.2 4 5.5 7.5 11 15 30 45 55 75 95
width of vessel (mm) 306 584 762 940 1118 1296 1476 1652 1828 2032 2210
total width (mm) 736 841 1066 1320 1474 1676 1854 2134 1186 2438 2668
lenght of vessel (mm) 1956 2820 3048 3328 4114 4724 5258 5842 6020 6124 6122
total lenght (mm) 2972 4876 5486 5918 6808 7570 8306 9296 9678 9704 9880
distance of material inlet& outlet (mm) 1752 2540 2768 3048 3810 4420 4954 5384 5562 5664 5664
height of center (mm) 380 380 534 610 762 915 1066 1220 1220 1220 1220
total height (mm) 762 838 1092 1270 1524 1778 2032 2362 2464 2566 2668
steam inlet (inch) 3/4 3/4 1 1 1 1 11/2 11/2 11/2 11/2 2
water outlet (inch) 3/4 3/4 1 1 1 1 11/2 11/2 11/2 11/2 2
  • JYG Hollow Blade Dryer
  • JYG Hollow Blade Dryer
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