Rotary Dryer

Product introduction

During the drying process, heat is transferred from the inner wall of the drum to its outer wall, passing through the dried food materials attached to the outer wall of the drum, evaporating the moisture on the materials. It is a continuous drying production machine.The dryer is mainly used in mineral processing, building materials, metallurgy, chemical industry and other departments to dry materials with a certain humidity or particle size. The dryer has strong adaptability to materials and can dry a variety of materials. The operation of the equipment is simple and reliable, so it is widely used. It can be divided into two types: industrial and civil. Industrial dryers are also called drying equipment or dryers. The machine is mainly composed of a rotary body, a lifting plate, a transmission device, a support device and a sealing ring. It adopts a new lifting plate. The device has multiple functions such as guiding, flow equalization, and material lifting. It can make the material evenly distributed in the radial cross section of the dryer. The material curtain becomes thin, even, and complete, and is completely exposed to the hot air flow to achieve the purpose of making full use of heat energy. .

The drum of the drum dryer is a slightly inclined and rotatable cylinder. Wet materials enter from the upper part of one end, and dry materials are collected from the lower part of the other end. Hot air enters from the feed end or discharge end and is discharged from the upper part of the other end. The cylinder is equipped with a forward lifting plate, which allows the material to be continuously lifted and dropped during the rotation of the cylinder, so that it can fully contact the hot air flow to improve the drying efficiency and move the material forward. The heat source for drying materials is generally hot air, high-temperature flue gas, water vapor, etc.

Mechanical characteristics

High Thermal Efficiency Since the dryer uses heat conduction, the heat transfer direction remains basically the same throughout the heat transfer cycle. Therefore, most of the heat supplied in the drum is used to vaporize the moisture of the material, and the thermal efficiency reaches 80% to 90%. The heat transfer and mass transfer process of the wet material film on the wall of the large drying cylinder is from the inside to the outside, in the same direction, and the temperature gradient is large, so that the surface of the material film maintains a high evaporation intensity, generally up to 30 ~ 70 kg/(㎡ .h). Stable drying quality: Because the heating method is easy to control, the temperature inside the cylinder and the heat transfer rate of the partition wall can remain relatively stable, so that the material film is dried in a heat transfer state, and the quality of the product can be guaranteed. However, the drum dryer also has its shortcomings, mainly including: due to the high surface humidity of the drum, some products will be overheated, which will damage the flavor or show abnormal color. In addition, if a vacuum dryer is used, the cost is high and it is only suitable for processing materials with very high heat sensitivity.

After-sales service commitment:

1. When the supplier delivers the goods, he shall provide the buyer with the equipment instruction manual (electrical schematic diagram, circuit diagram, etc.) as well as the installation and maintenance instructions and packing list.

 2. The equipment has a one-year warranty and lifetime maintenance.

 3. During the warranty period, for equipment failures caused by non-human factors, the seller will respond within 4 hours when the equipment fails and provide technical support to solve the problem as quickly as possible. During the warranty period, we are responsible for providing damaged parts and accessories free of charge. After the warranty period, only the cost of accessories will be charged.