Paddle dryer consists of two rotating shafts with wedged paddles,
jacketed drying chamber, drive motor and support frame. The drying
process is completed in sealed drying chamber to prevent pollution
by evaporated.
Paddle dryer is indirect heating drying processor. Heat medium can
be steam, hot water or thermal oil which can flow through the
hollow shafts and paddle via revolving joints, as well as jacketed
drying chamber. Wet material is evenly fed into the drying chamber
by screw feeder. With the rotation of two shafts and paddles, wet
material is completely mixed and stirred to contact with the hot
surface and move towards the discharge and heat transfer happens
and moisture evaporates rapidly.
Product Working Principle
CHPD series Paddle Dryer / Processor are highly efficient,
mechanically agitated, indirect heat transfer devices that add or
remove heat from a process mass. They are used for drying, heating,
cooling, pasteurization, crystallizing, and reacting of pastes,
cakes, powders, and granules.
Dual counter-rotating shafts with unique intermeshing discs produce
intimate mixing and optimize heat transfer. The use of hollow discs
and drying chamber heating jacket for heat transfer results in a
compact machine. The heat transfer medium: steam, hot water or hot
oil is isolated from the process mass. The KJG series Paddle Dryer
provides a reliable and efficient method for drying slurry, filter
cakes and centrifuge concentrates.
Technical Advantage
1) High thermal efficiency which can reach 95%
2) Heat transfer medium does not contact the product.
3) Gas is not used to convey the product. Off-gas flow is minimal.
4) Precise control of temperature
5) Uniform product quality, through mixing and movement of the
product
6) Continuous process on a once-through basis
7) High heat transfer area to process volume ratio - reduced floor
space
8) Easy to operate, requires minimal attention
9) Safer than direct drying when processing combustible material
10) Simple durable design for easy and low maintenance
11) Dual counter-rotating shafts with unique intermeshing discs
produce intimate mixing, uniform heat transfer, a high heat
transfer rate, and a self-cleaning effect.A large heat transfer
area to volume ratio is achieved by the use of hollow discs and a
jacketed vessel, through which the heating medium flows. The result
is a compact machine with less space requirements and lower
installation cost.
HEAT SOURCES(Temperature at 180ºC - 250ºC)
Heating by Steam
Steam enters 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.
Product Application
Blade dryer has been successfully used in food, chemical,
petrochemical, dye, industrial sludge and other fields. Equipment
heat, cooling, mixing features make it to complete the following
unit operations: calcination (low temperature), cooling, drying
(solvent recovery), heating (melting), response and sterilization.
Mixing blades at the same time the heat transfer surface, the
effective volume per unit area of heat transfer increases, reducing
the processing time. Heat transfer surfaces in wedge-shaped blades
with self-cleaning function. Compression - Expansion mixing
features make the material mixed uniformly. Material along the axis
into a "plug flow" movement, in the axial zone, the material
temperature, humidity, mixing a very small degree of gradient.
1. Conducting oil to do with the heat medium, blade dryer to
complete the work of low-temperature calcination. Such as: calcium
sulfate dihydrate (Ca2SO4 · 2H2O) calcined into calcium sulfate
hemihydrate (Ca2SO4 · 1/2H2O). Sodium bicarbonate (NaHCO3) into
calcined soda (Na2CO3) and so on.
2. Pass into the cooling medium, such as water, salt, etc. can be
used to cool the cooling. Such as: use of soda ash industry in
blade-type cooler base machine to replace the old air-cooled cooler
base machine, saving energy and exhaust gas processing equipment,
lower operating costs, but also for titanium, nickel alloy powder
and all kinds of powder granular materials cooling. On a single
machine where the material can be cooled from 1000 °C to less than
40 °C.
3.Dry, the main function of equipment, do not use hot air to
solvent recovery, energy consumption, environmental control is easy
to deal with the ideal state. On the need to recover solvents,
heat-sensitive materials, particularly flammable adapt easily
oxidized. Has been widely used in fine chemical, petrochemical, dye
industry.
4. Axial range, temperature, humidity, mixing degree of uniformity,
so equipment can be used to heating or melting, or some solid
material response. In the compound and modified starch industries
have been successfully used. Blade dryer can be used to carry out
sterilization of food and flour. Unit within the effective volume
of a large heating area, will soon be material heated to
sterilization temperature, to avoid prolonged heating change the
quality of materials.
Technical Parameters
| Model | HPD-3 | HPD-9 | HPD-13 | HPD-18 | HPD-29 | HPD-41 | HPD-52 | HPD-68 | HPD-81 | HPD-95 | HPD-110 | HPD-125 | HPD-140 |
| Heat transfer area(m2) | 3 | 9 | 13 | 18 | 29 | 41 | 52 | 68 | 81 | 95 | 110 | 125 | 140 |
| Effective volume(m3) | 0.06 | 0.32 | 0.59 | 1.09 | 1.85 | 2.8 | 3.96 | 5.21 | 6.43 | 8.08 | 9.46 | 10.75 | 12.18 |
| Speed range(rpm) | 5-20 | 5-20 | 5-20 | 5-20 | 5-20 | 5-10 | 5-10 | 5-10 | 5-10 | 1-8 | 1-8 | 1-8 | 1-8 |
| Transmission power(kw) | 2.2 | 4 | 5.5 | 7.5 | 11 | 18.5 | 30 | 37 | 45 | 55 | 75 | 90 | 110 |
| Device width(m) | 306 | 584 | 762 | 940 | 1118 | 1296 | 1474 | 1655 | 1828 | 2032 | 2210 | 2480 | 2610 |
| Overall width(m) | 736 | 841 | 1066 | 1320 | 1474 | 1676 | 1854 | 2134 | 2186 | 2438 | 2668 | 2732 | 2935 |
| Equipment length(m) | 1956 | 2820 | 3048 | 3328 | 4114 | 4724 | 5258 | 5842 | 6020 | 6124 | 6850 | 7500 | 7860 |
| Total length(m) | 2972 | 4876 | 5486 | 5918 | 6808 | 7570 | 8306 | 9296 | 9678 | 9704 | 10300 | 11800 | 12900 |
| Center height(m) | 380 | 450 | 534 | 610 | 762 | 915 | 1066 | 1220 | 1430 | 1560 | 1650 | 1760 | 1856 |
| Total Equipment height(m) | 762 | 838 | 1092 | 1270 | 1524 | 1778 | 2032 | 2362 | 2464 | 2566 | 2668 | 2769 | 2838 |
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