Mineral powder dryer three-drum dryer

Mineral powder dryer three-drum dryer

Structural composition:

• Drum part:

It is composed of three concentric cylinders of different diameters, which are nested and combined. This is the core component. Each cylinder has its own unique function. The inner cylinder is mainly used for preliminary heat exchange and drying, the middle cylinder further enhances the drying effect, and the outer cylinder plays the role of heat preservation and auxiliary drying.

• Transmission device:

It includes motors, reducers, gears, rollers and other components. The motor provides power and drives the cylinder to rotate through the transmission components, so that the material can continuously roll and move in the cylinder to ensure that the material can be heated evenly.

• Feeding device:

Located at one end of the dryer, it is used to transport materials such as mineral powder into the dryer. It is necessary to ensure that the material can enter the cylinder stably and evenly.

• Discharging device:

At the other end of the dryer, it is used to discharge the dried mineral powder. The discharging device must have good sealing to prevent hot gas leakage and dust overflow.

• Heat source system:

Provides heat for the dryer. Common heat sources include coal, natural gas, biomass particles, etc., and the appropriate heat source needs to be selected according to actual needs.

• Dust removal system:

used to collect and process dust generated during the drying process to reduce environmental pollution.

• Working principle:

wet mineral powder enters the inner drum from the feeding device. As the inner drum rotates, the dust is continuously picked up and scattered by the shoveling plate, and heat exchange is achieved in a spiral motion. Downstream drying is performed to initially remove most of the moisture. Then the mineral powder enters the middle drum for countercurrent drying. The material is repeatedly lifted in the middle drum, taking two steps forward and one step back, fully absorbing the heat of the inner and middle drums and extending the drying time. Finally, the mineral powder falls into the outer drum, moves in a rectangular multi-circuit manner in the outer drum, and is discharged from the discharging device after further drying.

Advantages and characteristics:

High efficiency and energy saving:

• High thermal efficiency:

The three-drum structure greatly increases the contact area between the material and the hot air flow, and the heat exchange is more sufficient. The heat emitted by the inner drum can be partially absorbed and utilized by the middle and outer drums, reducing heat loss. The thermal efficiency can be increased by more than 30%-50% compared with the single-drum dryer, with significant energy-saving effects, which can reduce energy consumption and production costs.

• Strong fuel adaptability:

It can adapt to a variety of fuels. Enterprises can flexibly choose according to local fuel resources and costs, such as coal, natural gas, biomass pellets, etc.

Good drying effect:

• The material is evenly dried:

The unique cylinder structure and lifting plate design allow the mineral powder to be evenly dispersed and turned in the dryer, avoiding material accumulation and uneven drying, and ensuring that the moisture content of the mineral powder after drying is uniform and consistent. The moisture content of the material after drying can reach 1-0.5% or less.

• High material quality:

The temperature and heat are evenly distributed during the drying process, and the mineral powder will not deteriorate or discolor due to local overheating, which well guarantees the quality of the mineral powder.

Compact structure:

• Small footprint:

The cylinder structure of the three-drum dryer is compact, and the footprint is only about half of that of the single-drum dryer with the same output. It is very suitable for enterprises with limited space and saves a lot of space.

• Easy installation:

The overall structure is relatively simple, the installation process is not complicated, and complex infrastructure and large-scale hoisting equipment are not required, which can shorten the installation period and reduce the installation cost.

Reliable operation:

• Low equipment wear:

The friction between the mineral powder and the cylinder and the scraper during the drying process is relatively small, which reduces the wear of the equipment and extends the service life of the equipment. In addition, the transmission device of the equipment adopts high-quality parts, operates smoothly and has high reliability.

• Simple operation and maintenance:

The degree of automation is high, the operation is simple and convenient, and only a small number of operators are needed to complete the production process. Daily maintenance work is relatively simple and the maintenance cost is low.

• Good environmental performance:

Equipped with an advanced dust removal system, it can effectively collect and process the dust generated during the drying process, reduce pollution to the environment, and meet environmental protection requirements.