Working principle and application scope of drum dryer

Drum dryer, also known as drum dryer, rotary dryer, rotary dryer, rotary kiln, etc., is widely used in building materials, metallurgy, chemical industry and other industries The equipment is mainly composed of drum, plate, transmission device, seal and heating system Simple structure, large capacity, high efficiency, continuous operation and convenient maintenance It is a kind of contact type internal heating and conduction drying machine The working principle of the drum dryer is as follows: in the drying process of the equipment, the heat is transferred from the inner wall of the drum to its outer wall, passes through the dried food materials attached to the outer wall of the drum, and evaporates the moisture on the materials, which is a kind of continuous drying production machinery The drum dryer belongs to the indirect heating continuous drying model The material forms a layer of uniform material film on the heat transfer surface, which is dried along with the rotation process of the drum At the discharge point, it is unloaded by the scraper to get powder or flake products The specially designed distribution device makes the material film uniform and adjustable in thickness, suitable for paste and congee like sticky materials The material has a short residence time under high temperature, and will not overheat Compared with the direct drying with hot air, the roller dryer does not need powder separation device, nor does the exhaust gas take a lot of heat, so the operation cost is low The roller dryer is mainly suitable for the following industries: 1 From the aspect of raw material form, centrifugal dehydration filter cake and pressure filter cake; drying of powder, particle, sheet, fiber and other materials that can flow freely 2 From the application scope of materials, it is widely used in the drying of mineral products, building materials, chemical products, compound fertilizer, organic powder, feed, liquor tank, starch residue, corn residue, soybean residue, etc 3 From the mechanism of rotary drum dryer, it can be divided into direct and indirect heating, ventilation pipe heating, steam pipe indirect heating, multiple heating and other structural forms 4 In terms of drying temperature, it can be selected from the range of 60 ℃ -600 ℃ In principle, the higher the temperature is, the higher the evaporation intensity is Therefore, the equipment is small in size, low in investment and energy consumption per unit The drum dryer has no flying dust, low noise, good operating environment and low operating cost It is suitable for viscous congee and slurry materials and can be operated continuously Do you know the principle of drum dryer? I hope it will help you.