Screens are an important part of the initial waste treatment process by either removing fine impurities (for example, organic matter, earth, sand) from valuable materials or by sorting mixed waste streams into grain size classes for further and better refinement. The primary objective is to produce a concentrate of valuable materials, which can subsequently be reintroduced into the recycling process as high-quality raw materials.
Despite making significant advances towards a more sustainable future, valuable waste recovery can still pose a challenge. The principle is simple, but the key point of waste screens isn’t just the actual screening procedure but also screening quality, a high throughput, space requirements, uptime, costs , and reliability.
A few Screening Challenge Examples
Various input materials will have different effects on the screens used. Here are just a few examples to showcase the challenges one might face while screening different waste streams.
- Material Variety and Screen Clogging
Wet, sticky, or irregularly shaped items can clog or bypass the screens, reducing efficiency and increasing downtime. Furthermore, long, flexible particles like wires, plastic films, or textiles can wrap around the screen components, leading to blockages on the screen, making it difficult for screens to sort efficiently.
- Wear and Tear
Processing heavy, abrasive materials like C&D Waste or glass causes increased wear on screening surface, requiring frequent maintenance.
- Dust Pollution
Screens often create airborne particles, especially when handling dry materials, requiring additional dust suppression systems.
- Overloading Problem
Material overload or unexpected large objects can damage screens or reduce their efficiency.
While you can’t tackle every problem at once, it is key to select the screen to suit your specific needs. By eliminating unnecessary features and focusing on addressing the actual problems, you can effectively select your screen to better meet your needs.
Our Screening Solutions for Various Materials
SCREEN BASIC
Screen: Single-deck linear vibrating screen with four longitudinally tensioned screen linings.
Key Points:
- SCREEN BASIC excels in precise screening of medium- to fine-grain dry, homogeneous bulk materials.
- Four longitudinally tensioned screen linings enable a high throughput for such material streams.
Performance:
By using four longitudinally tensioned screen linings, the SCREEN BASIC offers a maximum screen area and enables efficient separation of the input material. This leads to high throughput, especially when processing dry material streams. The quick tensioning device allows the use of all common longitudinally tensioned screen linings, such as wire mesh screens or perforated sheets. Additionally, to combat screen clogging, SCREEN BASIC features an integrated cleaning function utilizing anti-clogging balls to maintain optimal performance.
SCREEN BASIC is also available as SCREEN BASIC+ , which features a segmented screening deck, dividing the deck into two distinct screening zones. This can produce three material fractions in a single processing step.
SCREEN DOUBLE
Screen: Two-deck linear vibrating screen with 3D screen linings in the top deck and resonance-excited PU screening mats on the bottom deck (3D screen decks and flip-flop screens).
Key Points:
- Especially well suited for a wide range of material streams.
- Perfect for difficult to screen materials: even for moist or heavily abrasive materials - this screen enables almost perfect technical screening.
- A durable All-rounder.
Performance:
SCREEN DOUBLE has low-wear, easily replaceable screen linings on the upper deck and high-quality PU screen mats in the lower deck. Accelerations of up to 50G ensure almost clog-free screening in the lower deck. When developing the SCREEN DOUBLE module, great importance was attached to high flexibility - this means that the feed material is efficiently separated into 3 different fractions to provide you with optimal support in your recycling process.
SCREEN HEAVY
Screen: Finger Screen Deck or 3D Screen Linings for rough pre-screening
Key Points:
- Well suited for large, bulky and heavy parts.
- Wear and tear resistant with high throughput.
- Low Maintenance.
Performance:
By combining a vibrating feeder with a subsequent screening stage, fine particles are efficiently separated for optimal results. A variety of screening options, including 3D or finger screens, is available for effectively handling oversized materials. With high throughput rates and exceptional end-product purity, this machine provides an ideal solution for heavy screening tasks.
Why BLUELINE?
Our screening technology is designed to help users achieve accurate material separation based on their specific requirements. We provide practical solutions to meet a wide range of screening needs. Our modules have clog-resistant features to ensure smooth and reliable operation at all times. With a variety of options available, each module is designed for specific screening applications to meet your requirements.
For example, the flip-flop screen deck of our SCREEN DOUBLE module is perfectly suited to reliably screen difficult-to-screen material such as moist or cable-rich mixtures.
Thanks to the modular design of BLUELINE, you can integrate different SCREEN modules to fit your process- and recycling needs. Maintenance is straightforward, with screen linings designed for quick replacement, reducing downtime while maintaining superior screening quality. For handling dusty or powdery materials, SUPPORT EXTRACT+ integrates seamlessly with all BLUELINE systems, providing efficient, dependable and dust-free support.
Conclusion
Achieving the best results from your screening process depends on selecting equipment that meets your specific requirements. A well-designed screen should provide effective performance, balancing throughput with reliability.
BLUELINE provides a modular and flexible screening solution. We offer a variety of modules , which can be selected for various tasks and recycling processes, enabling precise screening and supporting efficient downstream operations.