KJG Series hollow blade dryer 
Wedge shaped hollow blade dryer can be used for indirect heating or cooling of paste, granule, powder and slurry, which can be used for drying, cooling, heating, sterilization, reaction and low temperature calcination. Special wedge type heat transfer paddle in the equipment, which has high heat transfer efficiency and self cleaning function of heat transfer surface.
The hollow shaft is densely arranged with a wedge shaped hollow blade, and the heat medium flows through the blade through the hollow shaft. The effective heat transfer area of the unit effective volume is very large, the heat medium temperature from -40 to 320 degrees Celsius, can be water vapor, also can be liquid type: such as hot water, heat conduction oil, etc.. Indirect conduction heating, without carrying air away heat, heat is used to heat the material. Heat loss is only through the thermal insulation layer to the environment. Wedge shaped blade heat transfer surface with self cleaning function. The relative motion of the material particles and the wedge shaped surface has a cleaning action, which can wash off the adhesive material on the wedge surface, so that the heat transfer surface can be kept clean during operation. The shell of paddle dryer is W type, and the shell is generally arranged between two and four hollow shafts. The shell is provided with a sealing end cover and an upper cover to prevent the material from leaking out and collecting the solvent vapor of the material. The discharge port is provided with a blocking plate to ensure the material level height, so that the heat transfer surface is fully covered by the material. The heat transfer medium passes through the rotary joint, flows through the shell jacket and the hollow mixing shaft, and the hollow mixing shaft has different internal structure according to the type of the heat medium, so as to ensure the best heat transfer effect.
Equipment characteristics
1, pulp drying machine energy consumption is low: as a result of indirect heating, there is no large amount of air carried away heat, dryer outer wall and set the insulation layer, the slurry material, evaporation 1kg water only 1.2kg water vapor.
2, pulp drying system cost is low: the unit effective volume has a huge heat transfer surface, it shortens the processing time, equipment size becomes smaller. Greatly reduced the size of the building and building space.
3, a wide range of materials with different heat medium, which can handle the heat sensitive materials and processing, the need for high temperature processing materials. Commonly used media are: water vapor, heat conduction oil, hot water, cooling water, etc.. Both continuous operation can be intermittent operation, can be applied in many areas.
4、Environmental pollution is small: do not use to carry the air, dust material entrainment is very little. Material solvent evaporation is very small, easy to deal with. In the case of contaminated materials or the need to recycle the solvent, the closed circuit can be used.
5、Low operating costs: the normal operation of the equipment, only 1 hours / day. Low speed mixing and reasonable structure. Wear small, low maintenance costs.
6、Stable operation: because the wedge blade special compression - expansion stirring, the particles fully with the heat transfer surface contact in the axial range, material temperature and humidity, the mixed gradient is very small, so as to ensure the stability of the process.
Use domain
Paddle dryer has been successfully used in food, chemical, petrochemical, dyestuff, industrial sludge and other fields. Equipment heat transfer, cooling, mixing characteristics of the following units can be completed operation: calcination (low temperature), cooling, drying (solvent recovery), heating (melting), reaction and sterilization. The stirring paddle is also a heat transfer surface, which increases the heat transfer area in the effective volume of the unit, and shortens the processing time. Wedge shaped blade heat transfer surface and self cleaning function. Compression - expansion mixing function to make the material mixture evenly. Material along the axis into a "piston flow" movement in the axial range, the material temperature, humidity, mixed degree gradient is very small.
1、Heat conductive oil is used as the heat medium, and the paddle dryer can be used for low temperature calcination. Such as: two water calcium sulfate (2H2O Ca2SO4) to the conversion of calcium sulfate and calcium sulfate (1/2H2O Ca2SO4). Sodium bicarbonate (NaHCO3) calcined into soda ash (Na2CO3) etc..
2、Through the cooling medium, such as water, cooling water, etc. can be used to cool. Such as: used in blades of soda industry type alkali cooling machine, replace old-fashioned air cooling alkali cooling machine, energy saving and exhaust gas treatment equipment, reduce operating costs, but also can be used for titanium, nickel iron alloy powder and powder material cooling. In a single machine, the material can be cooled from 1000 to less than 40.
3、Drying, the main function of the equipment, do not use hot air, so that the solvent recovery, energy consumption, environmental control in an easy to deal with the ideal state. Is especially suitable for the solvent to be recovered, flammable and oxidation heat sensitive materials. Has been widely used in fine chemical, petrochemical, dye industry.
4、The uniformity of temperature, humidity and mixing degree in the axial section makes the equipment can be used for heating or melting, or the reaction of some solid materials. In the compound fertilizer and modified starch industry have been successfully used. Paddle dryer can be used for the sterilization of food and flour. Large heating area within the effective volume of the unit, it will soon be heated to the temperature of the sterilization temperature, to avoid a long time to change the quality of the material.
Adaptive material
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, acrylic resin, engineering plastics, polyvinyl chloride, polyvinyl alcohol, poly styrene, polypropylene, polyester, poly formaldehyde and styrene. Acrylonitrile copolymer, ethylene propylene copolymer.
Environmental protection: PTA electroplating sludge, sewage sludge, boiler soot, pharmaceutical factory waste, waste residue, waste residue, sugar monosodium glutamate plant ash.
Feed industry: soy sauce residue, bone based feed, lees, food offals, apple pomace, orange peel, soybean meal, chicken feed, fish meal, feed additives, biological sludge
Food industry: starch, cocoa beans, corn grain, salt, modified starch, drugs.
Chemical industry: NPK compound fertilizer, sodium carbonate, kaolin, bentonite, white carbon black, carbon black, phosphorus gypsum, sodium fluoride, calcium oxide, magnesium carbonate, sodium cyanide, aluminum hydroxide, barium sulfate, calcium sulfate, calcium carbonate, dyes, molecular sieve, saponin
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