Drum Dryer

The scraper roller dryer is an internal heat conduction type rotary continuous drying device. The rotating drum is fed with a material film with a certain thickness through the lower material groove or the upper part of the roller, and the thickness of the material film can be adjusted by the material film control device so as to ensure that the material can be smoothly dried in the rotating process. The heat is conveyed to the inner wall of the drum through a pipeline, is conducted to the outer wall of the drum, and the feeding film is transferred, so that the moisture in the material film is evaporated, and the moisture is removed, so that the moisture-containing material is dried. The dried material is shoveled away from the drum by a scraper of the device on the surface of the flow cylinder, the exposed roller surface is again in contact with the raw material and forms a film for drying. The dry material is concentrated and packaged by a screw conveyor in a screw conveyor positioned below the scraper.

Roller dryer feature：

Compared with other drying equipment, scraper drum dryer has the following advantages.：

The thermal efficiency is high. Because the heat transfer mechanism of the scraper roller dryer is heat conduction, the heat transfer direction is consistent throughout the operation period, and the heat transfer direction is consistent with the whole operation period, and the other heat is used for the evaporation of the wet separation of the material film, and the thermal efficiency can be up to 80 to 90 percent.

The operation flexibility is large and the applicability is wide. The drying factors of the scraper roller dryer can be adjusted. Such as the concentration of the feed, the thickness of the coating material film, the temperature of the heating medium, the rotation speed of the drum, and the like, and the drying efficiency of the scraper roller dryer can be changed, and a plurality of factors are not related to each other. This brings great convenience to the operation of the scraper roller dryer, so as to meet the requirements of drying and different production of a plurality of materials.

Short drying time. Material drying cycle is generally only 10-60 seconds, suitable for heat sensitive materials.

The drying rate is high. Because the material film applied to the cylinder wall is very thin, generally 0.3 ≤ 1.5 kg, and the direction of heat transfer and mass transfer is the same, the surface of the material film can be kept at 20 kg ·L ~ (- 1) ·L ~ (- 1) ·L ~ (- 1). Evaporation intensity of water / h.

It has a wide range of applications. Suitable for drying of liquid or thicker materials in chemical, dye, pharmaceutical, food, metallurgy and other industries.