Fracturing sand dryer three-drum dryer

Fracturing sand dryer three-drum dryer

Structural composition:

• Drum part:

It is composed of three concentric cylinders of different diameters. The inner cylinder, middle cylinder and outer cylinder cooperate with each other. The inner cylinder performs preliminary drying, the middle cylinder further enhances the drying effect, and the outer cylinder plays the role of heat preservation and auxiliary drying.

• Transmission device:

including motor, reducer, support wheel, wheel belt, etc. The motor provides power, drives the support wheel to rotate through the reducer, and the friction between the support wheel and the wheel belt causes the drum to rotate, ensuring that the fracturing sand continues to roll and move in the drum to fully contact with the hot air flow.

• Feeding device:

The fracturing sand to be dried is transported to the dryer, and the stability and uniformity of the feed must be ensured.

• Discharging device:

 It is used to discharge the dried fracturing sand, and it has good sealing to prevent hot gas leakage and dust overflow.

• Heat source system:

Provides heat for the drying process. Common heat sources include coal, natural gas, biomass particles, etc.

• Lifting plate device:

Lifting plates with different angles and spacings are provided in the cylinder, so that the fracturing sand can be evenly dispersed and turned in the cylinder, increasing the contact area between the fracturing sand and the hot air flow and improving the heat exchange efficiency.

• Dust removal system:

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

• Working principle:

The wet fracturing sand enters the inner cylinder from the feeding device, and is continuously lifted and scattered by the lifting plate in the inner cylinder, and undergoes preliminary heat exchange with the hot air flow from the heat source system to achieve downstream drying and initially remove most of the moisture. Then the fracturing sand enters the middle cylinder for countercurrent drying, and the material is repeatedly lifted in the middle cylinder to extend the drying time. Finally, the fracturing sand falls into the outer cylinder, and is further dried in the outer cylinder before being discharged from the discharging device.

Advantages and characteristics:

High efficiency and energy saving:

• High thermal efficiency:

The three-cylinder structure increases the contact area and heat exchange time between the fracturing sand and the hot air flow. The heat emitted by the inner cylinder can be partially absorbed and utilized by the middle cylinder and the outer cylinder, reducing heat loss. The thermal efficiency can be greatly improved compared with the single-cylinder dryer, and the energy-saving effect is significant.

• Strong fuel adaptability:

It can adapt to a variety of fuels. Enterprises can flexibly choose according to local fuel resources and costs to reduce fuel costs.

Good drying effect:

• Uniform material drying:

The unique cylinder structure and lifting plate design enable the fracturing sand to be evenly dispersed and turned in the dryer, avoiding material accumulation and uneven drying, and ensuring that the moisture content of the fracturing sand after drying is uniform.

• High material quality:

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

Compact structure:

• Small footprint:

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

• Easy installation:

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

Reliable operation:

• Small equipment wear:

The friction between the fracturing sand and the cylinder and lifting plate during the drying process is relatively small, which reduces the wear of the equipment and extends the service life of the equipment.

• Simple operation and maintenance:

high degree of automation, simple and convenient operation, 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 advanced dust removal system, it can effectively collect and process the dust generated during the drying process, reducing pollution to the environment.