Industrial KJG Hollow Air Drying Sludge Vacuum Blade Paddle Hollow Dryer Machine
Introduction
The hollow shaft of the paddle dryer is densely arranged with wedge-shaped hollow blades. The heat medium flows through the blades by the hollow shaft to heat the blades. The material advances in the vessel at a uniform speed due to the design angle of the blades and absorbs the heat from the wall of the blade. The moisture is evaporated and pumped away by the draught fan.
The effective heat transferring area per unit volume is big, heat medium temperature from -40ºC to 320ºC, can be water vapor, may also be liquid -type: such as water, oil and so on.
It is Indirect conduction heating, no air take away the heat, high heating efficiency, the only heating loss just be radiating through insulation layer. Wedged surface can clear itself, the relate movement between the material particle and wedged surface will occur scrub, so in operation can maintain a clean heat transfer surfaces.
The shell of paddle dryer is Ω-shape, normally there are 2 to 4 hollow mixing shafts. There is sealing end plate and cover, can avoid the dust leakage to ensure the best heat transfer.
Working Principle
steam or thermal oil injected in the rotary shafts and the hollow blades.Wet sludge is fed into the paddle dryer machine by the screw feeder or sludge pump, and then is heated indirectly by the heat medium.New surface area is released continuously while the shafts rotate so that hot soda ash gets cooled in a high thermal efficiency.
Dry product is discharged through the discharge valve, while the dusty air is cleaned in the cyclone dust collector.
Technical parameters
| Model | KJG-2.7 | KJG-24 | KJG-52 | KJG-81 | KJG-110 |
| Heat transfer area | 2.7 | 24 | 52 | 81 | 110 |
| effective volume | 0.06 | 1.53 | 3.96 | 6.43 | 9.46 |
| revolution | 15-30 | 10-20 | 10-20 | 5-15 | 5-10 |
| power | 2.2 | 11 | 30 | 55 | 95 |
| width of dryer body | 306 | 1118 | 1474 | 1828 | 2210 |
| total width | 736 | 1474 | 1854 | 2286 | 2668 |
| length of dryer body | 1956 | 3454 | 5258 | 6020 | 6122 |
| total length | 2972 | 6147 | 8306 | 9678 | 9880 |
| distance between feeding and disharging | 1752 | 3150 | 4954 | 5562 | 5664 |
| height in center | 380 | | 1066 | 1220 | 1220 |
| total height | 762 | | 2032 | 2464 | 2668 |
| steam inlet | (2) 3/4 | (2) 1 | (2) 11/2 | (2) 11/2 | (2) 2 |
| water outlet | (2) 3/4 | (2) 1 | (2) 11/2 | (2) 11/2 | (2) 2 |
Applications
It has been successfully used in the food, chemical, petrochemical, dyes, industrial sludge and other fields. Heat transfer equipment, cooled, stirred solution of the following characteristics makes it possible to complete the unit operations: calcination (low temperature), cooled, dried (solvent recovery), heating (melting), the reaction and sterilization. Stirring blades while the heat transfer surface, so that the heat transfer area per unit effective volume is increased, the processing time is shortened. Wedge-shaped blade heat transfer surface and having a self-cleaning function. Compression - expansion of the material mixture evenly mixing function. Material axially into a "plug flow" movement in the axial zone, material temperature, humidity, mixing gradient is very small.
Features
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
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