What fields are paddle dryers suitable for?
The paddle dryer
produced by Changzhou Binda drying and granulation equipment Co., Ltd. has been successfully used in food, chemical, petrochemical, dye, industrial sludge and other fields. The characteristics of heat transfer, cooling and stirring of the equipment enable it to complete the following unit operations: calcination (low temperature), cooling, drying (solvent recovery), heating (melting), reaction and sterilization. The stirring blade is also a heat transfer surface, which increases the heat transfer area per unit effective volume and shortens the treatment time. The heat transfer surface of wedge blade also has self-cleaning function. Compression - expansion mixing function makes the materials mix evenly. The material moves in a "piston flow" along the axial direction. In the axial range, the gradient of temperature, humidity and mixing degree of the material is very small.
1. Using heat transfer oil as thermal medium, paddle dryer
can complete low-temperature calcination. For example, calcium sulfate dihydrate (Ca2SO4 · 2H2O) is calcined and transformed into calcium sulfate hemihydrate (Ca2SO4 · 1 / 2H2O). Sodium bicarbonate (NaHCO3) is converted into soda ash (Na2CO3) by calcination.
2. The cooling medium, such as water and cooling brine, can be used for cooling. For example, the paddle type soda cooler used in soda ash industry replaces the old air-cooled soda cooler, which saves energy and tail gas treatment equipment and reduces operating costs. It can also be used for cooling titanium dioxide, ferronickel alloy powder and various powder granular materials. The material can be cooled from 1000 ℃ to less than 40 ℃ in a single machine.
3. Drying, the most important function of the equipment, does not make the main use of hot air, so that solvent recovery, energy consumption and environmental control are in an ideal state of easy treatment. It is especially suitable for solvent recovery, flammable and easily oxidized heat sensitive materials. It has been widely used in fine chemical, petrochemical and dye industries.
4. In the axial section, the uniformity of temperature, humidity and mixing degree makes the equipment can be used to heat or melt or react with some solid materials. It has been successfully used in compound fertilizer and modified starch industries. Paddle dryer
can be used to sterilize food and flour. The large heating area in the unit effective volume can quickly heat the material to the sterilization temperature, avoiding the change of material quality caused by long-time heating.
Petrochemical Industry: polyolefin powder, polycarbonate resin, high and low density polyethylene, linear low density polyethylene, polyacetal particles, nylon 6, nylon 66, nylon 12, acetate fiber, polyphenylene sulfide, propylene based resin, engineering plastics, polyvinyl chloride, polyvinyl alcohol, polystyrene, polypropylene, polyester, polyformaldehyde, styrene acrylonitrile copolymerization, ethylene Propylene Copolymerization.
Environmental protection industry: PTA sludge, electroplating sewage sludge, boiler soot, pharmaceutical factory waste residue, sugar factory waste residue, monosodium glutamate factory waste residue and coal ash.
Feed industry: soy sauce residue, bone based feed, distiller's grains, food leftovers, apple residue, orange peel, soybean meal, chicken bone feed, fish meal, feed additives, biological residue mud
Food industry: starch, cocoa beans, corn kernels, salt, modified starch and drugs.
Chemical industry: soda ash, nitrogen phosphorus potassium compound fertilizer, kaolin, bentonite, white carbon black, carbon black, phosphogypsum, sodium fluoride oxide, calcium nitrate, magnesium carbonate, sodium cyanide, aluminum hydroxide, barium sulfate, calcium sulfate, calcium carbonate, dye, molecular sieve and saponin.