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KJG Series Hollow Blade Dryer
hollow paddle dryer is a kind of heat conduction mainly horizontal stirring type continuous drying equipment. Due to the shape of the stirring blade paddle, said paddle dryer, also known as foreign trough stirring dryer or dryer.
Detailed description
Overview:
◇ hollow paddle dryer is a stirring blade inside the device
settings, and the wet material in the stirring blade, full contact with
the hot surface and the heat carrier, so as to achieve the purpose of
the low-speed stirring drier, structure generally lying style, four-axis
or dual-axis, special wedge-shaped stirring blade has a higher heat
transfer efficiency and heat transfer surface self-cleaning function.
◇ hollow paddle dryer and hot air into conduction. I.e., hot air
drying of the material is in contact with each other by means of a heat
carrier (eg hot air) and dried with, the heat conduction in contact with
each other but not the carrier material was dried in direct contact
with the hot surface of the material. Conduction advantage is that the
material can not easily be contaminated, displacement of small, high
thermal efficiency, the volume is relatively small, is conducive to
energy conservation and the prevention of air pollution.
working principle:
Hollow paddle dryer heat transfer surface have blades,
stirring shaft parts, wall, etc., and leaves a large part of the heat
transfer area, the equipment, compact structure, large heat transfer
area per unit volume. In addition, the stirring and mixing the material
turning violent, resulting in very high heat transfer coefficient, so
the area is very small and space, saving the plant capital costs. Drying
process with less gas, the flow rate is low, being less dust entrained
gas, so convenient drying gas dust recovery, recycling equipment, small
size, can save equipment investment. The need for recovery of the
solvent drying process, can greatly improve the solvent
concentration. Due to the special blade structure, the material received
alternately squeezing and relaxation during the drying process, and
strengthen the dry. A high rate of drying chamber filled materials, can
reach 80% -90%, the residence time of materials by adjusting the feed
rate, stirring shaft speed, full of material and other parameters is
adjustable from a few minutes to a few hours be adjusted. In addition,
the material in the dryer from the feed port to the outlet of a
substantially piston movement, residence time distribution is narrow,
and thus uniform product moisture content. Paddle agitator shaft having
an axial angle, the material can be dried continuously.
Process Equipment Demo:
Structure:
In two-axle example to explain the structure (hollow paddle
dryer can be divided into single, double, four). It consists of
jacketed end faces W-shaped casing, cover, two bladed hollow shaft, end
caps at both ends, through a rotary joint media, metal hose and gears,
sprockets and other parts of the transmission mechanism comprises
composition.
It is the core equipment and welding two hollow shaft
stirring blade in the hollow shaft. Blade shape of a hollow
semi-circular wedge, can pass into the heating medium. Apart from the
stirring effect, but also the heat transfer body of the device. Heat two
main beveled side of the blade, so when the material in contact with
the slope, with the rotation of the blades, the particles quickly slid
the incline, the heat transfer surface constantly updated, enhanced heat
transfer. At the bottom of the blade has a triangular blade to the
bottom of the material deposited on the shell blowing and prevent dead.
Blade arrangement and the size of each part have certain
requirements, but also in the feed zone, drying zone, the discharge zone
in addition to the blades, the other an auxiliary mechanism to ensure
the stability of the whole operation, uniform drying. In addition, the
residence time can also be adjusted.
Features:
Blade dryer is low energy consumption: Due to the indirect
heating, not a lot of air to carry away the heat, the outer wall of the
dryer and set the insulation layer of slurry material, only 1.2kg 1kg
steam evaporate water.
Blade dryer is low cost system: has a huge heat transfer surface
per unit effective volume, shortening the processing time, the device
size becomes smaller. It greatly reduces the floor space and building
space.
A wide range of materials handling: Use a different medium heat,
can deal with heat-sensitive materials, but also need to deal with the
high temperature treatment of materials. Common media are: steam,
thermal oil, hot water and cooling water.
Continuous operation can also be intermittent operation can be applied in many fields.
Environmental pollution: do not use carry air, dust material
entrained very little. Material solvent evaporation is very small, easy
to handle. Of contaminated material or solvent to be recovered
condition, it can be closed circulation.
Low operating costs: The device is operating normally, only 1-2 /
day. Low speed agitation and reasonable structure, equipment wear
amount is small, very low maintenance costs.
Operation stability: Due to the wedge-shaped blade special
compression - expansion stirring, so that the material particles full
surface contact with the heat transfer in the axial zone, material
temperature, humidity, mixing gradient is very small, thus ensuring
process stability.
application:
Paddle dryer 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.
Used to do medium heat, paddle dryer low temperature
calcination work to be completed. Such as: calcium sulphate dihydrate
(CaSO4 • 2H2O) calcining is converted to calcium sulfate hemihydrate
(CaSO4 • 1 / 2H2O). Sodium bicarbonate (NaHCO3) into calcined soda ash
(Na2CO3) and the like.
Pass into a cooling medium, such as water, salt water, etc.
can be used to cool the cooling. Such as: used in the soda ash industry
paddle cooler base machine, replace the old air-cooled cooler base
machine, energy saving and exhaust gas treatment equipment, reduce
operating costs, but also for titanium, nickel-iron alloy powder and
various granular powder cooling the material. In a single machine in the
material can be cooled from 1000 ℃ to less than 40 ℃.
Drying, the main function of the device, do not use hot
air, the solvent recycling, energy consumption, environmental control in
the ideal state tractable. To be recovered solvents, flammable material
is particularly heat-sensitive oxide adaptation. It has been widely
used in chemical, petrochemical and dye industries.
Axial area, temperature, humidity, degree of mixing
uniformity, so that the device can be used to heat or melt, some of the
solid material or the reaction. It has been successfully used in the
fertilizer industry and modified starch. Paddle dryer can be used for
sterilization of food and flour. Unit effective volume of large heating
area, will soon be heated to the sterilization temperature, avoiding
prolonged heating to change the quality of materials.
Adaptation Material:
1, petrochemical industry: polyolefin powder,
polycarbonate resins, high density polyethylene, linear low density
polyethylene, polyacetal particles, nylon 6, nylon 66, nylon 12,
cellulose acetate, polyphenylene sulfide , acrylic resin, engineering
plastics, polyvinyl chloride, polyvinyl alcohol, polystyrene,
polypropylene, polyester, polyoxymethylene, styrene - acrylonitrile
copolymers, ethylene - propylene copolymers.
2, environmental protection industry: of PTA
sludge, electroplating sewage sludge, boiler ash, pharmaceutical waste,
waste sugar, monosodium glutamate factory waste, coal ash.
3, the feed industry: soy sauce residue,
bone-based feed, distillers grains, food angle materials, pomace, orange
peel, soybean meal, chicken feed, fish meal, feed additives, biological
sludge of.
4, the food industry: starch, cocoa, corn, salt, modified starch, pharmaceuticals.
5, the chemical industry: soda ash, NPK
fertilizer, kaolin, bentonite, white carbon black, carbon black, gypsum,
oxidation sodium fluoride, nitrate, calcium, magnesium, sodium,
aluminum hydroxide, barium sulfate, calcium sulfate, calcium carbonate,
dyes, molecular sieves, saponin.
Schematic:
Technical specifications:
Model | KJG-2.7 | KJG-9 | KJG-13 | KJG-18 | KJG-24 | KJG-29 | KJG-36 | KJG-41 |
Heat transfer area m2 | 2.7 | 9 | 13 | 18 | twenty four | 29 | 36 | 41 |
Effective volume m3 | 0.06 | 0.32 | 0.59 | 1.09 | 1.53 | 1.85 | 2.42 | 2.8 |
Speed range rpm | 15-30 | 10-25 | 10-25 | 10-20 | 10-20 | 10-20 | 10-20 | 10-20 |
Power kw | 2.2 | 4.0 | 5.5 | 7.5 | 11 | 11 | 15 | 15 |
Body width A mm | 306 | 584 | 762 | 940 | 1118 | 1118 | 1296 | 1296 |
Total width B mm | 736 | 841 | 1066 | 1320 | 1474 | 1474 | 1676 | 1676 |
Body length C mm | 1956 | 2820 | 3048 | 3328 | 3454 | 4114 | 4115 | 4724 |
Total length D mm | 2972 | 4876 | 5486 | 5918 | 6147 | 6808 | 6960 | 7570 |
Access to materials from the E mm | 1752 | 2540 | 2768 | 3048 | 3150 | 3810 | 3810 | 4420 |
Center height F mm | 380 | 380 | 534 | 610 | 762 | 762 | 915 | 915 |
Overall height G mm | 762 | 838 | 1092 | 1270 | 1524 | 1524 | 1778 | 1778 |
N-inch steam inlet | (2) 3/4 | (2) 3/4 | (twenty one | (twenty one | (twenty one | (twenty one | (twenty one | (twenty one |
Inch outlet O | (2) 3/4 | (2) 3/4 | (twenty one | (twenty one | (twenty one | (twenty one | (twenty one | (twenty one |
Model | KJG-48 | KJG-52 | KJG-62 | KJG-68 | KJG-73 | KJG-81 | KJG-87 | KJG-95 | KJG-110 |
Heat transfer area m2 | 48 | 52 | 62 | 68 | 73 | 81 | 87 | 95 | 110 |
Effective volume m3 | 3.54 | 3.96 | 4.79 | 5.21 | 5.78 | 6.43 | 7.39 | 8.07 | 9.46 |
Speed range rpm | 10-20 | 10-20 | 10-20 | 10-20 | 5-15 | 5-15 | 5-15 | 5-15 | 5-10 |
Power kw | 30 | 30 | 45 | 45 | 55 | 55 | 75 | 75 | 95 |
Body width A mm | 1474 | 1474 | 1651 | 1652 | 1828 | 1828 | 2032 | 2032 | 2210 |
Total width B mm | 1854 | 1854 | 2134 | 2134 | 2286 | 2286 | 2438 | 2438 | 2668 |
Body length C mm | 4724 | 5258 | 5410 | 5842 | 5461 | 6020 | 5537 | 6124 | 6122 |
Total length D mm | 7772 | 8306 | 8865 | 9296 | 9119 | 9678 | 9119 | 9704 | 9880 |
Access to materials from the E mm | 4420 | 4954 | 4953 | 5384 | 5004 | 5562 | 5080 | 5664 | 5664 |
Center height F mm | 1066 | 1066 | 1220 | 1220 | 1220 | 1220 | 1220 | 1220 | 1220 |
Overall height G mm | 2032 | 2032 | 2362 | 2362 | 2464 | 2464 | 2566 | 2566 | 2668 |
N-inch steam inlet | (2) 11/2 | (2) 11/2 | (2) 11/2 | (2) 11/2 | (2) 11/2 | (2) 11/2 | (2) 2 | (2) 2 | (2) 2 |
Inch outlet O | (2) 11/2 | (2) 11/2 | (2) 11/2 | (2) 11/2 | (2) 11/2 | (2) 11/2 | (2) 2 | (2) 2 | |
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