QJ Hollow Blade conductive style drying machine(Hollow paddle dryer, Hollow impeller dryer, Hollow paddle drying machine , hollow paddle drying
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.
Low Operation Cost
- Easy to operate
- Requires minimal attention
- Simple instruments monitor the process
- High efficiency
- Low off-gas volume
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 chock shaped blades are concentrated on the hollow shaft. Heat media flow through the blade from the hollow shaft. The heat transferring area in the effective volume is very high. The temperature range of heating media is -40 ℃ to 320 ℃ . It might be steam, or liquid state, such as steam, thermal oil etc. Indirect heating, there's no heat carried out by air. All heat is utilized for to drying the material except the lost of heat insulation layers. The surface of chock shaped blade has self-cleaning function. The relative movements of the product particles and the chocked shaped surface might clean the material attached to the chock shaped surface, so to keep the cleanliness of heat transferring surface during working. The shell of hollow blade dryer is Ω shape. 2 or 4 pieces of hollow stirring shaft are usually equipped in the shell. To avoid any leakage of material, there're sealed terminal cover and top cover with the shell. The heat transferring media flow through the rotation connector, jacket's shell and hollow stirring shaft. To ensure best transferring effect, the hollow stirring shaft adopts different interior structure in accordance with different heating media.
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|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 r.m.p||15-30||10-25||10-25||10-20||10-20||10-20||10-20||10-20||5-15||5-15||5-10|
|A width of vessel mm||306||584||762||940||1118||1296||1474||1652||1828||2032||2210|
|B total width mm||736||841||1066||1320||1474||1676||1854||2134||1186||2438||2668|
|C length of vessel mm||1956||2820||3048||3328||4114||4724||5258||5842||6020||6124||6122|
|D total length mm||2972||4876||5486||5918||6808||7570||8306||9296||9678||9704||9880|
|E distance of material inlet & outlet mm||1752||2540||2768||3048||3810||4420||4954||5384||5562||5664||5664|
|F height of center mm||380||380||534||610||762||915||1066||1220||1220||1220||1220|
|H total height mm||762||838||1092||1270||1524||1778||2032||2362||2464||2566||2668|
|N steam inlet “N” (inch)||3/4||3/4||1||1||1||1||11/2||11/2||11/2||11/2||2|
|O water outlet "o" (inch)||3/4||3/4||1||1||1||1||11/2||11/2||11/2||11/2||2|
2. The cost of the blade dryer is low: The unit effective volume has very large heat transferring surface, so the processing time is shorted, the size of the equipment becomes small. The building area and place are sharply decreased.
3. The range of material to be processed is wide: Heat sensitive material and the materials to be processed under high temperature might be processed with different heating media. The normal media are: steam, thermal oil, hot water and chill water. It might be continuous or batch operation, widely used in many areas.
4. The pollution is less: Without any carrying air, very little powder is carried out. The solvent evaporated is very few, it easy to be processed. For the material that might cause pollution or the solvent to be recovered, it might adopt sealed circulation.
5. The operation cost is low: 1hour/day/operator is enough for normal operation. Low stirring speed and reasonable structure, the worn amount is few, and the maintenance fee is low.
6. Steady operation: The material particles fully contact heat transferring surface, because of the special compressing and swell-stirring effect of the chock shaped blade. The difference of the temperature, humidity and mixing effect are very small in the different axial area, so to ensure the stability of process.