Introduction of paddle dryer

        Paddle dryer is an indirect conduction heating type drying equipment, suitable for processing materials with good thermal stability, such as paste, powder and granular. After a special configuration, it can be used to process heat-sensitive materials, materials that require solvent recovery during the drying process, and materials that need to be dried under vacuum. At the same time, the paddle dryer can also be used to cool powder and granular materials by injecting a cooling medium, as well as to cool and crystallize some special materials. It can also inject a heating medium for heating the material and the reactor to be heated.

work principle

        In the outer casing, there are two parallel shafts with staggered blades. Each shaft has several hollow sector paddles, which are intertwined at certain intervals. There are two types of blades: feed to the shear plane and return to the shear plane. The shaft rotates at a low speed. The heating medium enters the hollow rotating shaft and the blades through the universal rotating joint. After the heat is transferred and dried, it is discharged through a rotary joint. The materials are continuously fed into the equipment, and then stirred and mixed near the paddle. At the same time, the heat conduction of the paddle and the outer jacket gradually dries the material. The height of the overflow weir can be changed to adjust the residence time. In addition, the steam generated during the drying process is exhausted through the exhaust hole with a small amount of air.

feature

  1. Compared with conventional convection drying, the typical heat conduction drying method has higher thermal efficiency and energy saving by 30-60%.

  2. The heat transfer area per unit volume is greater than that of the indirect heat transfer dryer;

  3. The opposite movement makes the surface of the blade have a special self-cleaning function, and the heating surface is constantly updated;

  4. The airflow is smaller, the dust entrainment is less, and the exhaust gas treatment is easier;

  5. Large storage capacity of materials, compact design and small floor space;

  6. It can be used in combination with other drying methods to establish a drying system to obtain better economic and technical performance;

  7. It can be operated in vacuum and recyclable solvent;

Scope of application

 1. Organic chemical products, such as indigo dyes, organic dyes, organic dyes, organic dyes, cellulose acetate, polyphenylene sulfide, acrylic resin, engineering plastic polyvinyl chloride, polyvinyl alcohol, polystyrene, polypropylene, polyester, polyoxymethylene, etc. 

 2. Inorganic chemical products, such as calcium carbonate, calcium toothpaste, magnesium carbonate, magnesium hydroxide, magnesium oxide, phosphogypsum, calcium nitrate, calcium sulfate, kaolin, barium carbonate, potassium carbonate, iron, phosphorus and potash fertilizer, soda ash, bentonite, Carbon black, sodium fluoride, aluminum hydroxide, cobalt carbonate, cobalt sulfate, copper powder, zinc ore concentrate powder.

 3. Environmental protection industry, such as municipal sewage sludge, industrial sludge, electroplating sewage sludge, boiler ash, pharmaceutical factory waste residue, sugar factory waste residue, monosodium glutamate factory waste residue, coal ash, etc.

 4. Feed industry, such as soy sauce residue, bone feed, distiller's grains, apple pomace, orange peel, soybean meal, chicken bone feed, fish meal, feed additives, biological slag mud, etc.

 5. Medicines and foods, such as starch, cocoa, corn, salt, modified starch, medicines, fungicides, proteins, medicinal aluminum hydroxide, penicillin intermediates