Three Cylinder Dryer

Three cylinder dryer is also called Triple-pass Rotary Drum Dryer. it is a kind of drying equipment to dry material with humidity or granularity in the industries of mineral dressing,building material.

What is three cylinder dryer?

The three-cylinder dryer is to shorten overall size of the dryer body by changing the single drum dryer into three nested cylinders. The cylinder part of the dryer is composed of three coaxial and horizontal inner, middle and outer cylinders stacked, which makes full use of the cross section of the cylinder. It greatly reduces the floor area and plant construction area. The three cylinder dryer is widely used in drying sand, slag, clay, coal, iron powder, mineral powder and other mixed materials in various industries, dry-mixed mortar in the construction industry, river sand, yellow sand, etc

2. Due to the adoption of the three-cylinder structure, the length of the cylinder is greatly shortened, thereby reducing the occupied area and the investment cost of civil engineering.

3. The transmission system is simplified. Supporting wheels are used for transmission instead of large and small gears. Thereby reducing the cost, improving transmission efficiency and reducing noise.

4. The fuel can be adapted to coal, oil and gas. It can dry lumps, pellets and powder materials below 20mm.

Working principle

Materials enter the inner side of the drum through the feeding device to realize current flow drying process,then the materials enter the middle layer of the inner wall through the other end to realize counter current drying process.They are lifted in over and over in the middle layer which advance in two-steps forward and one-step back way.The three-drum dryers absorb heat from both inner drum and middle drum,which extend the drying time and realize the best drying condition.Finally,materials fall into the external layer of the drum from the other end of the middle layer, processing in a rectangle multi-loop way.The dried materials move quickly out of the drum under the hot air,while the wet ones remain because of their own weight.Materials are dried completely inside the rectangle shoveling plate and then cooled by the single drum cooler, thus finishing the whole drying process.