After more than 20 years of exploration and research and technological innovation, ZJN Company has developed the "Rotary Harrow Rolling Three-stage Multi-loop" and "Automatic Rake-turning Segmental Combined" three-cylinder dryer, which is currently technically advanced in the drying field, with obvious technical advantages and practical effects. 1. The air volume, wind speed and wind direction can be controlled. According to the needs of materials, the air volume, wind speed and wind direction of each drying stage can be scientifically designed, while the single drum dryer does not have this function. 2. High utilization rate of heat energy. The three-stage dryer adopts a sleeve inlay type, and the speed reduction drying and the constant speed drying can be carried out at the same time with less heat loss; Wonderful design of rotary rake and turning rake makes the material spread more fully and suspend more evenly, maximizing the contact surface with hot air and doubling the drying efficiency. 3. The design of water vapor discharge is reasonable. The three-cylinder dryer adopts three-stage discharge for the evaporated water vapor. The materials are dried in stages, and the drying rate is dynamic, while the single-cylinder dryer adopts one-stage discharge, and the materials go through the whole process at the same drying rate. 4. The way of transportation is peculiar. The three-cylinder dryer is horizontally placed, and after special material guiding design, the travel of materials in the equipment is artificially controllable, and can be prolonged several times or even tens of times according to requirements, so that the storage amount of materials is large; while the single-cylinder dryer needs to be placed obliquely, so that the materials can naturally go through the full travel only by gravity. 5, save space, safe and durable. The three-cylinder dryer adopts the sleeve inlay design, which occupies less space (saving 60%), is convenient to install, simple to operate, stable to run, and has little power demand, which cannot be compared with the single-cylinder dryer. ZJN three-cylinder dryer enjoys a high reputation at home and abroad due to its extraordinary research and development concept, unique energy-saving design, strict manufacturing process and excellent drying effect. It completely ends the drying problems of various high humidity and high viscosity materials and is widely used in papermaking, chemical industry, printing and dyeing, electroplating, leather, pharmacy, sewage treatment, feed, brewing, starch processing, biological fermentation and other industries. This series of equipment has been put into the market for more than 1,000 units and has numerous customers at home and abroad.