Alternative fuel

X-Cutter (XC) system by UNTHA: New cutting system for single-stage SRF processing

The X-Cutter (XC) system for the XR waste shredder was first revealed at the IFAT event in Munich, in May 2018. Designed to achieve the next generation of performance for single-step SRF shredding – or provide a direct replacement for existing high-speed shredders – it can transform varied input wastes ranging from waste wood through to pulper ropes.

The technology can produce a homogenous 30 mm SRF (solid recovered fuel) for cement production or refined RDF (refused derived fuel) for WtE systems that require a homogeneous feed material.

Capable of achieving throughputs of up to 40 t/h – whether on the static or mobile X-Cutter – this latest cutter evolution can run with a slow rotor speed of either 65 rpm for complex waste streams, or 85 rpm for cleaner input materials. With equivalent machinery often operating at far higher speeds of up to 250-350 rpm, UNTHA is therefore striving for the lowest wear, most robust safety standards, and greatest energy-efficiency on the market. The design is also able to deal with large unshreddable items without the excessive downtime that operators typically face with the major repairs needed on high-speed technology.

Its launch followed 12 months of behind-the-scenes research and development, and machines have now been sold to waste handlers and alternative fuel producers in the UK, Ireland, Germany and Norway.

“This X-Cutter is fast-becoming a popular replacement for the industry’s existing high-speed waste shredders,” comments Peter Streinik, head of UNTHA’s global waste shredding division. “It is challenging the norm and making operators think differently about how to process waste into an energy source.

“For example, the slower speed means reduced noise levels which heightens operator wellbeing, which is crucial for organisations’ duty of care. It also means cutters have a longer lifespan which lowers the whole life running cost of the machine, without jeopardising performance. And the flexibility to handle extremely varied and complex input materials addresses the increasing challenge that clients are facing – they need future-proofed technology that can evolve alongside market conditions.”

Demand for the new X-Cutter spiked following a European roadshow of the shredder, which allowed operators to trial the machine using their own materials. Three trials in the UK, for instance, saw the technology transform five different input waste streams into fuels with varying specifications. During one test, pre-treated residual waste was transformed into an 80 mm fuel at a rate of 30 tph; another saw black bag MSW converted into a < 40 mm fuel at 22 tph and a third achieved 12 tph when processing light cage material for SRF. Metal recovery rates also surpassed all clients’ expectations, with exceptionally clean scrap extracted from the magnet belt, every time.

“Without a doubt the results of trials such as these, play a huge part in the consequent demand for our technology - seeing is definitely believing,” continues Peter Streinik. “With our active presence in America, Australia and Asia – as well as Europe – and with conversations unfolding as we speak, our goal is for this latest innovation to be operational on every continent, within the next six months.”

Further technological developments include a low-maintenance safety clutch and more powerful drive motors, to meet clients’ ever-increasing performance requirements.

www.untha.com

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