Based on the absorption of advanced technologies at home and abroad, the company designs and implements rotary vacuum paddle dryer that can directly heat or cool pasty, granular, powdery and pasty materials to complete drying, cooling, Heating, sterilization, reaction, low temperature calcination and other unit operations. Special wedge stirring device in the heat transfer paddle, with high heat transfer efficiency and heat transfer surface self-cleaning function.
1.Blade dryer low energy consumption, due to indirect heating, no large amount of carrying air to carry heat, drying wall and set the insulation layer, the slurry material, evaporation of 1kg water only 1.22kg water vapor.
2.Blade dryer system cost is low: Unit effective volume has a huge heat transfer surface, it shortens the processing time, the smaller the size of the device. It greatly reduces the construction area and building space.
3.Processing a wide range of materials: the use of different heat medium, you can handle heat-sensitive materials, but also deal with the need for high-temperature processing of materials. Often media are: water vapor, thermal oil, hot water, cooling water and so on. Can be continuous operation can be intermittent operation, can be applied in many fields.
4.Pollution environment is small: not applicable to carry air, dust material entrainment rarely. Material solvent evaporation is small, easy to handle. For contaminated materials or solvent recovery conditions, closed-loop can be used.
5.Low operating costs: The device is operating normally, only 1-2 people / day. Low-speed mixing and reasonable structure. Low wear, low maintenance costs.
6.Stable operation: Due to the special compression-expansion stirring action of the wedge blades, the particles of the material fully contact with the heat transfer surface. In the axial section, the temperature, humidity and mixing gradients of the material are very small, so as to ensure the stability of the process sex.
Hollow shaft dense arrangement of wedge-shaped hollow blades, heat medium flows through the hollow shaft blade. The effective volume of heat transfer area is very large, the heat medium temperature from -40 ℃ to 320 ℃, can be water vapor, it can be liquid type: such as hot water, heat conducting oil. Indirect conduction heating, no carrying air to carry heat, heat are used to heat the material. The heat loss is only the heat dissipation to the environment through the gas insulation. Wedge blade heat transfer surface with self-cleaning function. The relative movement between the material particles and the wedging surface produces a scrubbing action that scrubs the wedging surface attachment material and keeps the clean heat transfer surface in operation. Paddle dryer shell is W-type, the shell is generally arranged two to four hollow mixing shaft. Shell has a sealed end caps and cover to prevent the leakage of material dust and mobile phone solvent solvent. A baffle is arranged at the material outlet to ensure the height of the material level so that the heat transfer surface is fully covered by the material. Heat medium through the rotary joint, through the shell jacket and hollow stirring shaft, hollow mixing shaft according to the type of heat medium and have different internal structure to ensure the best heat transfer.
•Paddle dryer has been successfully used in food, chemical, petrochemical, dyes, industrial sludge and other fields. Equipment heat transfer, cooling, stirring the characteristics of the unit to enable it to complete the following operations: calcination (low temperature), cooling, drying (solvent recovery), heating (melting), reaction and sterilization. Stirring blades are heat transfer surfaces at the same time, increasing the heat transfer area within the effective volume of the unit and shortening the processing time.
•Wedge blade heat transfer surface and self-cleaning function.
•Compression - Expansion Stir to mix the material evenly. Materials along the axial into a "plug flow" movement, in the axial interval, the material temperature, humidity, mixing gradient is very small.
•Heat conducting oil as a heat medium, paddle dryer can be completed at low temperature calcination. Such as: calcium sulfate dihydrate (CaSO4 · 2H2O) calcined into calcium sulfate hemihydrate (CaSO4 ·0.5H2O). Sodium bicarbonate (NaHCO3) calcined into soda (Na2CO3) and so on.
•Through the cooling medium, such as water, cooling brine can be used to cool. Such as: the use of soda ash industry cooler, instead of the old air cooler cooling machine, saving energy and exhaust gas treatment equipment, reducing operating costs, but also for titanium dioxide, nickel-iron alloy powder and a variety of powder Cooling things. In a single machine can be cooled from 1000 ℃ to less than 40 ℃.
•Drying, the most important function of equipment, does not use hot air, making solvent recovery, energy consumption, environmental control in an ideal state of easy handling. The need for solvent recovery, easy to burn flammable and heat-sensitive materials in particular. Has been widely used in fine chemicals, petrochemicals, dyes industry.
•The uniformity of temperature, humidity, and mixing within the axial range allows the equipment to be used to heat or melt, or to perform some solid material reaction. In the fertilizer and modified starch industry have been successfully used. Paddle dryer can be used to sterilize food and flour. Unit effective volume of large heating area, the material will soon be heated to sterilization temperature, to avoid a long time heating and change the material quality.
Adaptation of materials
Polyolefin powder, polycarbonate resin, high and low density polyethylene, linear low density polyethylene, polyacetal particles, nylon 6, nylon 66, nylon 12, acetate, polyphenylene sulfide, Based resins, engineering plastics, polyvinyl chloride, polyvinyl alcohol, polystyrene, polypropylene, polyester, polyoxymethylene, styrene-acrylonitrile copolymerization, ethylene-propylene copolymerization.
◆Environmental Protection Industry
PTA sludge, electroplating sewage sludge, boiler soot, pharmaceutical waste, sugar residue, MSG plant residue, coal ash.
Soy sauce, bone-based feed, distiller's grains, food waste, apple pomace, orange peel, soybean meal, chicken feed, fish meal, feed additives, bio-slag mud.
Starch, cocoa beans, corn kernels, salt, modified starch, medicines.
Soda Ash, NPK Fertilizer, Kaolin, Bentonite, White Carbon Black, Carbon Black, Phosphogypsum, Sodium Fluoride Oxide, Calcium Nitrate, Magnesium Carbonate, Sodium Cyanide, Aluminum Hydroxide, Barium Sulfate, Calcium carbonate, dye, molecular sieve, saponin.