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 transferring blade,
makes high heat transferring efficiency, and provide self-cleaning
function. The special chock shaped stirring and heat transferring
blade has high heating efficiency and self-cleaning function of the
heating transferring surface.
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 -40to 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 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.
1. The heat consumption of blade is low: No heat carried out by the
air because of indirect heating; there's no heat insulation layer
with the exterior wall of the dryer. It consumes 1.2 kg of steam to
evaporate 1kg of water for to drying slurry state of material.
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 few 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.
The blade dryer is successfully applied in foodstuff, chemical,
petrochemical, dyestuff, and industrial mud etc. The heating
transferring, cooling and stirring characters enable it to perform
the following unit operation: combustion (low temperature),
cooling, drying (recovery of solvent), heating (melting), reacting
and sterilizing. The stirring blade is heat transferring surface
too, so to increase heat transferring area of unit effective volume
is increased, and decrease processing time. The chock shaped heat
transferring surface has self-cleaning function. Compressing and
swell-stirring functions make the material mixed uniformly. The
material perform the movement of "piston flow" along the shaft. The
difference of the temperature, humidity and mixing effect are very
small in the different axial area. The blade dryer is capable to
perform combustion under low temperature if we adopt thermal oil as
heating media, such as Ca2S04 2H2O is combusted into Ca2SO4 1/2H2O, NaHCO3 is combusted into Na2CO3 and so on. It's capable for cooling process with water and chill
salted water etc, such as base cooling machine in Na2CO3 industry, instead of the old style base air cooler, so to save
power and the processing equipment for tail air, and save operation
cost. Drying is the main function of this machine. Drying without
hot air makes the process of solvent recovery, energy consumption,
control of environment ideal, easy to teat. It's specially
applicable for recovery of solvent and
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