- Technical Data
Rotary dryer is a device for materials heating and drying. Materials in the rotary cylinder of concentric series are able to be dried in the process of traversing back and forth.
Structure of the rotary dryer
According to customers’ demand, the gas producer, combustion chamber or supporting elevator, belt conveyer, fixed-quantity feeder, cyclone dust collector and draught fan can be designed respectively in the rotary dryer.
The main body is chiefly composed of the cylinder, front roll ring, back roll ring, gear, and dam roller; drag roller, pinion, discharging part, raising plate, reducer, motor, feeding chute, furnace body, etc.
Working principle of the rotary dryer
The reduction of heat dissipation surface helps to reduce heat consumption, and the increasing heat exchanging surface can greatly improve the efficiency of heat exchange. For materials cannot contact smoking, multi-cylinder rotary dryer supplies the internal flue and annular flue inside and outside the cylinder respectively, and each flue uses radical flue to communicate with each other, and it is also efficient and energy-saving.
Indirect heat drier is primarily used to dry granule materials with a certain degree of moisture and granularity, such as yellow sand, molding sand, cinder, clay, and some other small granule materials resistant to high temperature and smoking and dust. The moisture content of the materials shall be below 1 to 0.5 percent after drying. This machine mainly consists of rotary body, raising plate, transmission, back-up unit as well as seal ring. It is characterized by the merit of reasonable structure, excellent workmanship, high production, low energy consumption and convenient operation.
Working principle of the Indirect heat drier
Materials be entered into the inside of the rotary cylinder from the feeding device and then be made parallel-flow drying. Then, the materials will be moved to the other side to be dried. Therefore, not only the heat from the internal rotary drum, but also the heat from the middle rotary drum can be fully absorbed. These materials that are dried enough will be transmitted quickly out of the rotary drum, while those which are not qualified are unable to move quickly because of their weight.
Sawdust dryer adopts the spiral conveyer to add the granular powder into the drying tube. That is a process of evaporating the moisture in the wet materials during conveying and dispersing of the high-speed hot stream, so as to obtain powdery or granular dry products. This equipment is mainly composed of air heater, feeder, airflow drying pipe, cyclone separator and draught fan.
Features of the sawdust dryer
1.Great drying intensity.
2.Short drying time.
3.Simple drying structure, small covering area, easy to maintain.
4.High throughput, high heat efficiency.