Indirect Heat Drier

Brief Introduction

The indirect heat drier belongs to traditional dryer which is an indirect heated rotary dryer with a mainstream of conduction and heating, while enjoys the thermal radiation. The indirect heat drier is mainly formed with rotator, plate, transmission device, supporting device and other components, and the machine has strong points of reasonable structure, well-made, reliable operation, low energy consumption, high thermal efficiency, convenient operation, etc.

Application

Meanwhile, it’s easy to achieve automatic control to reduce operation labor and save resources. The indirect heat drier is mainly used to dry materials with certain humidity and particulate size, such as, sand, casting sand, cinders, small-sized clay, as well as other small-sized materials not afraid of high temperature. The moisture content of dried material can be 1-0.5 % or less. 

Working Principle

Materials are generally fed into the inner layer of rotary drum by feeding device to achieve downstream drying, so materials in the inner layer of copy board will be constantly lifted and fell down to achieve heat exchange in the shape of helix. The material dried by indirect heat drier does not directly contact with the heat transfer medium, because the heating medium is hot flue gas moving from the radial fire tube to the interlayer of flue board, and then coming back to the inlet end. The dried material will be discharged by the feeding tank on the bottom of the dryer. The moisture gas produced in drying process will be discharged by the hydro-fuge fan.