drum dryer

Drum dryer is a traditional drying equipment with a wide range of applications. Here is a detailed introduction about it:

Structural composition:

Rotating body: It is the core component of a drum dryer, usually a tilted cylindrical body. The cylinder is generally made of steel plate, with a certain thickness and strength to ensure that it can withstand the weight and friction of the material during rotation. The inclination angle of the rotating body is usually between 1 ° -5 °, with the purpose of allowing the material to move from the higher end to the lower end under the action of gravity.

Material lifting plate: installed on the inner wall of the rotating body, its function is to lift and throw the material when the cylinder rotates, forming a uniform curtain inside the cylinder, increasing the contact area between the material and the hot air flow, and improving the drying efficiency. The shape, quantity, and installation angle of the lifting plate will be designed according to different materials and drying requirements.

Transmission device: used to drive the rotation of a rotating body, usually composed of components such as motors, reducers, couplings, gears, etc. The motor provides power, and the reducer reduces the high speed of the motor to a speed suitable for the rotating body. The coupling is used to connect the motor and the reducer, and the gear transmits power to the rotating body, allowing it to rotate smoothly.

Supporting device: used to support the rotating body, including supporting wheels, rolling rings, and other components. The supporting wheel is installed on the foundation, and the rolling ring is installed on the outer wall of the rotating body. The supporting wheel and rolling ring cooperate with each other to enable the rotating body to rotate on the supporting device. The supporting device needs to have sufficient strength and stability to ensure the normal operation of the equipment.

Sealing ring: used to prevent hot gas leakage and material leakage, installed at the connection between the rotating body and the inlet, outlet and other parts. The material of the sealing ring is usually high temperature resistant, wear-resistant rubber or other sealing materials, which need to be regularly inspected and replaced to ensure its sealing performance.

Working principle: The material to be dried enters the rotating body of the drum dryer from the feeding port, and as the rotating body rotates, the material is continuously picked up and thrown off by the lifting plate. At the same time, the hot air flow enters the dryer from the feed or discharge end and comes into parallel or counter current contact with the material. The material comes into full contact with the hot air flow during the falling process, undergoes heat exchange, and the moisture in the material is gradually evaporated. The dried material is discharged from the discharge port under the action of gravity.

Type:

Single return dryer: With a relatively simple structure and only one rotary cylinder, it is suitable for materials with small processing capacity and low drying requirements.

Double return dryer: It has two rotating cylinders, and the material undergoes two drying processes in both cylinders, improving drying efficiency and quality. It is suitable for materials with high drying requirements.

Triple return dryer: composed of three concentric rotating cylinders nested together, it has the advantages of small footprint and low energy consumption. It can fully utilize heat energy and has a good drying effect on materials. It is widely used for drying various materials.

Application areas: Widely used in metallurgy, building materials, chemical industry, coal washing, fertilizer, ore, sand, clay, kaolin, sugar and other industries. For example, it can be used to dry materials such as ore, slag, coal, metal powder, clay, diatomaceous earth, kaolin, etc; In the agricultural field, it can be used to dry straw, grass, leaves, fish meal, etc; In the food industry, it can be used to dry vegetables, fruits, grains, etc.

advantage:

High processing capacity: capable of handling large amounts of materials, suitable for large-scale production operations.

High operational flexibility: It can be adjusted according to factors such as material properties, humidity, and processing capacity to meet different production requirements.

Strong adaptability: It has good adaptability to various materials, and can effectively dry materials in different forms such as powder, particle, and block.

Reliable operation: The equipment has a simple structure, stable operation, low failure rate, and low maintenance costs.

High thermal efficiency: It can fully utilize thermal energy, has high thermal efficiency, and saves energy.