What is HEC?

HIGH-EFFICIENCY CLASSIFIERS

• Low head loss (150 daPa)

• Low power consumption(0.2 to 0.5 kWh/t)

• Anti-wear system adapted to specific processed material results in long maintenance intervals

• Rotor blades offer high efficiency in removal of coarse particles compared to conventional classifiers

• Lower outlet velocity with vortex cutter

• Lower outlet velocity with vortex cutter

• Highest possible cage loading

• Machined dynamic blades for higher separation efficiency

The 4th generation High Efficient Classifiers (HEC) is a fully automated control system that ensures strict quality control. Crafted from top-quality, high-wear-resistant materials like HARDOX 400, the classifier provides optimal protection against wear and tear. The HEC can handle exceptionally high specific material loads. Its turbo design significantly reduces power consumption. Moreover, its unique turbine blade design increases the separation zone by five to ten times compared to other designs.

The adjustable stator blades rectify the gas flow, adapting the tangential speed of the gas to the turbine’s rotation speed. This ensures only a radial speed of the fluid within the turbine. Consequently, a drag speed that directly opposes the centrifugal force is achieved, minimizing blade wear by eliminating particle impact. An adjustable closing further reduces pressure loss, promoting uniformity in speed profiles at the turbine’s periphery and height.

A patented turbine blade profile achieves cutting precision characterized by minimal imperfection or a high separation curve. The blades are designed to maintain the same cutting diameter regardless of the position between two turbine blades. This ensures that centrifugal and drag forces remain equal for a given particle diameter. As the particle approaches the turbine’s center, the centrifugal force decreases, necessitating a reduction in drag force. This is accomplished by slowing down the radial speed and widening the passage as the particle moves towards the turbine axis. Consequently, the separation area extends beyond the rotor periphery, encompassing all the passages between the turbine blades. This is crucial for achieving exceptional cutting quality in practical conditions far from ideal operating conditions, such as turbulence in running speeds and even at the turbine inlet.

To enhance the evacuation of fine particles with the gas and rectify the rotational flow of the outlet gas, a vortex system composed of radial blades is integrated into the turbine’s center.