Widely used Vacuum Rotary Paddle Dryer for customer requirements
Vacuum Rotary / Paddle Dryers provide fast, uniform, low
temperature drying of press cake, filter cake, and slurry type
materials requiring agitation and recovery of solvents during
drying. The batch drying time depends on the composition, nature
and amount of solvent present in the wet product.
Consisting of a stationary horizontal jacketed cylinder (vacuum
chamber) designed for vacuum or pressure operation under controlled
heat with an internal revolving agitator, which can be heated to
further shorten drying time. The custom-select agitator mixes and
circulates the product into contact with the heated surfaces to
achieve uniform drying with minimum power consumption, tumbling,
and dusting.
The batch operation of the vacuum rotary dryer is simplified by
automatically loading (charging) the wet product into the top of
the jacket cylinder with the agitator rotating for uniform
distribution and complete dry product discharge through a
pneumatically operated underside discharge door.
The jacketed cylinder and agitator are designed to meet the
operating pressures and material compatibility requirements for
each individual application and are built to comply with ASME, PED
Pressure Codes or other national design and construction codes.
Working Principle
KJG Series New Type Hollow Paddle Dryer for Industrial Sludge is a
kind of conduction heating and low rotating speed-stirring type
drier. There is jacket on the body of drier, hollow oar blade on
the hollow shaft, filling heating medium in them, wet material is
stirred by oar blade and carries on heat exchange with shaft and
oar blade. The structure of the machine is generally horizontal
type with two or four shafts.
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
Petrochemical industry: polyolefin powder, polycarbonate resin,
high and low-density polyethylene, linear low-density polyethylene,
polyacetal granules, nylon 6, nylon 66, nylon 12, acetate,
polyphenylene sulfide, propylene base resin, polypropylene,
engineering plastics, polyvinyl chloride, polyvinyl alcohol,
polystyrene, polyester, polyoxymethylene, styrene-acrylonitrile
copolymerization, ethylene-propylene copolymerization.
Environmental protection industry: sludge, electroplating sewage
sludge, boiler soot, sugar factory waste residue, pharmaceutical
factory waste residue, MSG factory waste residue, coal ash.
Feed industry: soy sauce residue, bone-based feed, distiller's
grains, food scraps, apple pomace, orange peel, soybean meal,
chicken bone feed, fish meal, feed additives, bio-sludge.
Food industry: starch, cocoa beans, corn kernels, salt, modified
starch, medicines.
Chemical industry: soda ash, NPK compound fertilizer, kaolin,
bentonite, white carbon black, carbon black, phosphogypsum, calcium
sulfate, calcium nitrate, magnesium carbonate, sodium cyanide,
oxidized sodium fluoride, aluminum hydroxide, barium sulfate,
calcium carbonate, molecular sieves, dyes, saponins.
Features
1) Low energy consumption: As a result of indirect heating, no much air take away the
heating, the outer wall has insulation layer, the heat efficiency
can be up to 90%. For slurry, evaporating 1kg of water just need 1.2kg vapor.
2) cheap investment: it has huge effective heat transfer surface area per unit, reduce treatment time,
let the machine size become small, so It greatly reduces the
construction area and building space.
3) wide range of materials handling: can use different types of media, not only can treat
heat-sensitive materials, but also handle high-temperature
materials. Common medias are: water vapor, thermal oil, hot water,
cooling water and so on.
4) flexible operation method: Can be continuous operation or intermittent operation, can be
applied in many fields.
5) Low environmental pollution: don't use air to dry material, dust material entrainment is rare.
Small solvent evaporation, easy to treat. For contaminated
materials or solvent recovery conditions, closed-loop can be used.
6) Cheap operating costs: Low-speed mixing and reasonable structure, Low wear, low
maintenance costs. For normal operation, just only 1 person / day.
7) Stable operation: Due to the special compression-expansion stirring of the wedge
blades, the material particle contact with the heat transfer
surface enough, it ensure the processing is stable.
