LINDNER-RECYCLINGTECH GMBH

Polaris single-shaft shredder optimizes the one-step processing of refuse-derived fuel

The Polaris 2200 and 2800 are two new single-shaft shredders from Lindner that have been optimized for the cost-efficient, single-step shredding of untreated household refuse as well as industrial and commercial waste. A typical application area is the processing of refuse-derived fuel (RDF) that is used instead of fossil fuels in calciners of cement factories or in thermal power plants. Because the Polaris shredders run at a particularly low speed and with correspondingly high torque, their knives cut the input material with enormous power, as required by the single-step process. Type 2200, with a feed opening of 4090 x 3000 mm and a rotor length of 2115 mm, shreds, for example, up to 22 t of commercial and industrial waste per hour. The Polaris 2800, with a feed opening of 4779 x 2370 mm and a rotor length of 2805 mm, achieves a volume of up to 32 t/h. Depending on the choice of screens, the final grain sizes are between 50 mm and 120 mm.

With its cutting principle and automated pusher system control, Lindner’s single-shaft shredder technology ensures constant output with uniform grain size. Every individual component of the system is noted for the robustness that is typical of Lindner products. This begins with the solid chassis and the powerful, highly reliable asynchronous motors with nominal outputs of 200 kW (Type 2200) and 2 x 132 kW (Type 2800). The two-step belt drive that has proven so successful with Lindner shredders, transmits the very high torque to the rotor. If non-shreddable extraneous material turns up, the integrated sliding clutch brings the machine reliably to a standstill. The large hydraulic maintenance flap and doors offer convenient access, for example to replace the six or eight easy-to-handle screen modules or to rotate the knives that can be used on four sides.

Ideal for application-optimized RDF

With the development of the Polaris single-shaft shredder, Lindner is supporting the trend towards the optimum processing of RDF to ensure that it is coordinated to the scheduled application. This enables the system to function cost-effectively and with maximum efficiency. Companies that process refuse-derived fuels for captive use thus have the possibility to make their production more cost-efficient. The rugged, low-maintenance ­Polaris shredder also makes it possible for customers who process waste to market it as RDF to achieve higher margins.

Depending on the input material, the relatively coarse shredded material produced by the new Polaris shredders has an average calorific value of 15 to 18 MJ/kg, and is thus ideal for the calciner. In comparison, the use of RDF as a secondary fuel in the main combustion chamber of cement factories, where temperatures of up to 2000 °C can be reached, makes different demands on the properties of the RDF. Here, two-step systems from Lin­dner are still the first choice. Consisting of a Jupiter pre-shredder, a separating unit and a Komet post-shredder, they produce an optimum shredded material with a defined grain size of less than 35 mm.

Pilot application proves cost efficiency

The Austrian waste disposal company, KAB Kärntner Abfallbewirtschaftung (www.kab.co.at), which operates equipment for the production of refuse-derived fuels at the very highest technical standard, was one of the first processors to gain practical experience with the new Polaris. Says Managing Director Werner Bleiberger: “Our company wanted to take advantage of the economic advantages of the single-step shredding technology. In the search for a modern, high-performance system, our attention was drawn to Lindner. They loaned us a first prototype of the Polaris to test for around one year. Over this period, the system proved its efficiency, reliability, low maintenance and maintenance friendliness very impressively indeed. Lindner’s uncompromising commitment to maximum quality and the shredder’s successful implementation in practice were convincing arguments for us.”

www.l-rt.com

Related articles:

Issue 2018-7-8 LINDNER-RECYCLINGTECH GMBH

Polaris – one-step shredding

RDF shredding in one go – with only one machine: Lindner presented a new model of the Polaris shredder model at IFAT 2018, the Polaris 1800. The Polaris was developed for the one-step production of...

more
Issue 2017-7-8 LINDNER-RECYCLINGTECH GMBH

New RDF plant opened in Karlsruhe

Following a construction period of approximately four months Alba Nordbaden GmbH, a subsidiary of the Alba Group, put the new production line for refuse-derived fuel (RDF) from mixed construction and...

more
Issue 2019-7-8 LINDNER-RECYCLINGTECH GMBH

Geocycle Mexico declares war on landfills with Lindner’s Polaris 2200

Mexico’s mountains of waste may soon be history. To achieve this ambitious goal in a country that produces around 100000 t of waste a day, the affiliate of the cement giant LafargeHolcim is relying...

more
Issue 2018-7-8 LINDNER-RECYCLINGTECH GMBH

New Atlas stationary primary shredder with e-drive

At this year’s IFAT Lindner introduced a completely new system: The Atlas, a stationary ‘ripping’ twin-shaft primary shredder with high throughput and little downtime which complements the...

more
Issue 2018-6 LINDNER-RECYCLINGTECH GMBH

Vexor relies on Lindner’s expertise to produce high-tech refuse-derived fuels

Vexor Engineered Fuel of Indiana (VEFI) has opened a new fuel processing operation “made by Lindner” in Gary, Indiana, just south of Chicago/USA. Lindner previously supplied a Komet 2800 HP for...

more