Overview

Bentonite, as an important non-metallic mineral, is widely used in metallurgy, petroleum, environmental protection and other fields. Its drying process directly affects its application performance. The traditional drying method has problems such as low thermal efficiency (30% -40%), uneven drying, and wall sticking and agglomeration. The hollow blade dryer uses large-area conduction heating and self-cleaning stirring to increase the thermal efficiency to 80% -90% and achieve a drying uniformity of ≥ 95%, making it an ideal choice for drying bentonite.

Equipment structure

-Hollow blade system: dual axis or four axis arrangement, with thermal oil (0.3-0.8MPa) or steam (0.4-1.6MPa) flowing inside the blade

-Wedge shaped heat transfer surface: The blade has a wedge-shaped structure, and the heat transfer surface is constantly updated during the stirring process to prevent material adhesion

-Shell jacket: The cylinder is heated with a jacket, increasing the heat transfer area by 30% -50%

-Transmission system: Variable frequency motor (4-2rpm stepless speed regulation)+cycloidal pinwheel reducer, with high torque and stable operation

working principle

1. Wet material input: Bentonite with a moisture content of 30% -40% is uniformly fed into the dryer through a spiral feeder

2. Stirring and drying: The rotation of the blade causes the material to constantly flip, while receiving dual heating from the blade and jacket

3. Water evaporation: The material disperses into particles during the mixing process, and the water evaporates rapidly

4. Dry material discharge: Dry materials with a moisture content of ≤ 12% are discharged from the discharge outlet, with uniform particle size and no clumping

>Heat transfer mechanism: mainly using conduction heating, heat is directly transferred to the material through the metal wall, avoiding the heat loss caused by hot air drying, and the heat utilization rate reaches 80% -90%.

technical advantage

-Adaptation to high viscosity materials: The wedge-shaped blade has self-cleaning function, effectively preventing bentonite from sticking to the wall

-Energy savingEffect: The thermal efficiency reaches 80% -90%, saving more than 40% energy compared to airflow drying

-Good drying uniformity: The material stays in the machine for a uniform time, and the moisture content deviation of the product is ≤ 1%

-Environmentally friendly: Closed operation, no dust leakage, meets environmental protection requirements

Comparison of Economic and Technological Indicators

Anti stick structure design

-Special blade shape: Wedge shaped blades generate compression during rotation, peeling off adhesive materials

-Surface treatment technology: The blade surface is coated with spray welded hard alloy or tungsten carbide, which is wear-resistant and anti stick

-Online cleaning device: equipped with a rotating scraper system to clean wall material in real-time

Energy saving technology integration

-Heat medium circulation system: adopting closed heat medium circulation to reduce heat loss

-Waste gas heat recovery: Heat recovery of a small amount of exhaust gas to improve energy utilization efficiency

-Variable frequency control: automatically adjust the speed according to the moisture content of the material, optimize energy consumption

intelligent control system

-Multi parameter monitoring: real-time monitoring of temperature, pressure, speed and other parameters

-Drying endpoint determination: automatically determine the degree of drying based on changes in the power curve

-Remote operation and maintenance: supports IoT access, enabling remote monitoring and fault diagnosis

Key operating parameters

Product quality control

-Accurate temperature control: segmented temperature control to avoid excessive temperature damaging the activity of bentonite

-Moisture uniformity: Multiple zone heating is used to ensure uniform moisture content of the product

-Particle size maintenance: Gentle stirring method to maintain the original particle size distribution