working principle

The sludge particles that have undergone soft granulation are continuously added to the first layer of drying disc on the upper part of the dryer by the self feeder. The rake arm with rake blades rotates to continuously flip the material. The material flows along an exponential spiral over the surface of the drying disc, and the material on the small drying disc is transferred to the outer edge, where it falls onto the outer edge of the large drying disc below. The material moves inward on the large drying disc and falls into the next layer of small drying disc from the middle discharge port. The drying plates of different sizes are arranged alternately up and down, allowing the material to flow continuously through the entire dryer.

A hollow drying tray is filled with heating medium, which includes saturated steam, hot water, and thermal oil. The heating medium enters from one end of the drying tray and exits from the other end. The dried material falls from the last layer of the drying tray to the bottom of the shell, and is finally transferred by the rake blades to the discharge port for discharge. Moisture escapes from the material and is discharged through the moisture outlet located on the top cover. Dry materials discharged from the bottom layer can be directly packaged.

Features of the equipment

1. High evaporation intensity; After soft granulation, the sludge particles exhibit hollow structure characteristics, with irregular, uniform, and non adhesive surfaces. They achieve complete surface drying in a constantly updated free rolling state, with simultaneous conduction, convection, and radiation heat transfer, rapidly completing the migration and transformation of cell water and internal bound water into surface water until the final product is formed.
2. Extremely low power consumption; Compared to traditional blade sludge dryers, disc sludge dryers, etc., the fine sediment naturally peeled off during the sludge particle drying process forms a ball shaped surface, effectively reducing the power consumption of traditional sludge drying equipment to overcome friction. The main spindle speed of the whole machine is low, and the material conveying system requires less power and consumes less electricity.
3. Safety and environmental protection; The drying process operates approximately statically, with no dust flying in the drying chamber, indirect heat exchange, and low exhaust gas volume.
4. Facilitating subsequent processes; The sludge particles with super high porosity are more conducive to incineration, pyrolysis gasification, and rapid fertilizer fermentation.

Technical Specifications

Note: Some parameters may be adjusted according to different materials during design, and the design shall prevail