The Advantages of Disc Screens
There are many screening equipment manufacturers and types of screens. The optimal screening solution will depend on the material being screened, sizing requirements, and cost considerations. Some of the more common screening equipment include trommel and star screens.
While effective, both types of screens have their respective shortcomings. Meanwhile, disc screens have a number of advantages that make them the ideal solution across many industries.
An Overview of Disc Screens
Disc screens can be deployed in many industries and are capable of screening almost any material – from solid waste and compost to scrap metal and car tires. All disc screens share a similar design.
Disc screens are comprised of mounted rotor shafts. Each shaft includes a series of mounted discs. The discs of one shaft are staggered with those on the subsequent rotor shafts while leaving spaces for undersized material to fall through.
The design and placement of the discs allows material to float over the screen. In addition, the discs are ideal for agitating the material, further adding to the screen’s efficiency. While seemingly straightforward, this design yields a number of benefits over other types of screening equipment.
Higher Efficiency Screening
Other types of screens, namely trommels, rely on the lifting and dropping materials in order to screen them. By comparison, disc screens allow for materials to pass over the screen in a single layer.
Additionally, the discs are designed to further agitate and beat the material. This process results in higher yields with less blinding, clogging, and wrapping of the screen. When taken as a whole, disc screens require less downtime, increasing their overall efficiency.
Meanwhile, star screens, while similar to disc screens, are better suited for bulkier materials. Star screens are often used with materials like woody biomass or aggregate, but they are less effective when screening finer materials such as ash, organic waste, or plastics. Because of the high shaft speed of star screens, they screen inefficiently. In addition, like trommels, star screens are less precise and require an upward tilt to main efficiency. By comparison, disc screens can sort a larger variety of materials and can do so both precisely and effectively on a flat plane.
In screens where clogging is more common, maintenance costs become a concern. While blinding and clogging of screens hurts efficiency, this issue is further compounded by the cost of maintaining the machine. In the case of trommels, damage may require the replacement of the entire drum which is both costly and time consuming.
Disc screens offer a unique advantage in their design. Generally, the discs and rotor shafts are less prone to damage and wear. In the event that damage does occur, repairs often only need to be made to a single rotor shaft, allowing for lower costs and less downtime.
One of the greatest advantages of disc screens is their compact design. When compared to other types of screening equipment, disc screens can screen the same volume on a screening surface less than half the size. Overall, disc screens have a significantly smaller footprint than trommels.
The Eco-Star® Dynamic Disc Screen
The Eco-Star® Disc Screen offers all of the advantages of traditional disc screens, with additional benefits derived from its unique design. The Eco-Star® offers durable construction, with HARDOX discs built to withstand even the most demanding screening applications. Its durable construction is coupled with high energy-efficient design. The patented anti-wrapping design keeps film and wrappables from shutting the machine down.
When compared to other types of screening equipment, like trommels, the Eco-Star® is capable of performing the same work while utilizing less than half the energy. In addition, the Eco-Star® allows for instant changing of screen size by adjusting the operation speed of the machine.
For more information or to receive a quote for the Eco-Star® give our sales team a call at (717)-656-2131 or click below.