Energy-saving Rotary Dryer for Mineral Dressing

3. Working principle of  Energy efficient dryer

The material enters the inner layer of the rotary drum of the energy saving dryer from the feeding device to realize downstream drying.

The material is continuously copied under the inner plate, the scattered material moves in a spiral way to realize heat exchange, and the material moves to the other end of the inner layer and enters the middle layer.

 For countercurrent drying, the material is repeatedly carried out in the middle layer in a two-step, one-step way. In the middle layer, the material fully absorbs both the heat from the inner cylinder and the heat from the middle cylinder, and at the same time prolongs the drying time. The material is dry here.

The material goes to the other end of the middle layer and falls into the outer layer. The material moves in a rectangular multi-loop way in the outer cylinder to achieve the drying effect.

Under the action of hot air, the wet material which does not reach the drying effect can not travel quickly because of its own weight. The material is fully dried in the rectangular plate, thus the drying purpose is accomplished.

4.Technical parameters of  Energy efficient dryer

5. Characteristics of   Energy efficient dryer

(1) The dryer has the advantages of strong anti-overload ability, large handling capacity, low fuel consumption and low drying cost;

(2) It adopts the downstream drying method, the flue gas and the wet material enter into the dryer from the same side, the high evaporation intensity can be obtained by using the high temperature flue gas, the outlet temperature of the dryer is low and the thermal efficiency is high;

(3) According to the different properties of materials, the operation parameters can be changed, so that the materials can form a stable completely broken fabric curtain in the dryer barrel, and the heat exchange is more sufficient;

(4) The new feeding and discharging device put an end to the phenomenon of feeding blockage, discontinuity, inhomogeneity and recharge of the drum dryer, and reduce the load of the dust removal system;

(5) The new internal structure strengthens the cleaning and heat conduction of dispersed materials, eliminates the sticking phenomenon of the inner wall of the cylinder, and has stronger adaptability to the moisture and viscosity of the materials.

(6) The dryer realizes "zero horizontal thrust", which greatly reduces the wear of the retaining wheel and makes the cylinder run smoothly and reliably.

(7) The dryer adopts "adjusting center type supporting wheel device" to make the matching of supporting wheel and rolling ring in linear contact forever, thus greatly reducing wear and power loss.