Redwave says the PMCS “allows maximum automation of systems as well as optimisation of the entire sorting process.” The system, which is increasingly being used throughout Europe, can be retrofitted to all types of sorting systems with Redwave sorting machines for total system control, the manufacturer says.
Redwave says of ROWE Nuremberg, “The direction forward in Nuremberg is set for the highest quality standards in the field of waste paper sorting for household waste. To meet the steadily increasing demands on deinking cleanliness and efficiency, ROWE GmbH in Nuremberg decided to fundamentally renew the existing waste paper sorting system and to bring it in line with state-of-the-art technology.”
Installed in early 2017, Redwave says the PMCS optimization control technology continuously uses the material data of the near-infrared sorters online and gives a visualization of the changes in material quality on its display screen. The material flow is monitored automatically and makes peaks in change of material or process disturbances immediately visible, the company says. The plant operator can now act and apply corrections immediately, if it is judged that product quality will be negatively affected. ROWE achieves a consistently high output quality, even with fluctuating input, according to Redwave.
Using two sorting lines, the ROWE plant prepares about 25 metric tons of scrap paper per hour to produce pure-grade paper fractions. The sorting system is equipped with cardboard and fine screens for separation of cardboard and small contaminants. Through the use of a specially developed intermediate bunker, the usual fluctuations in the input material are compensated for by the variable, large-area cardboard fraction, Redwave says. The downstream sorting units can be optimally fed at all times.
Karlheinz Mankus, plant manager of the ROWE GmbH plant, says, “Previously, building a plant for 200 [metric] tons a month was just about conceivable. Now we do this in our lunch break.”
Angela Hanke, managing director of Entsorgungstechnik BAVARIA GmbH, the plant builder at ROWE, says, “It was a bold but absolutely forward-thinking step that ROWE GmbH, Nuremberg, took when deciding to completely overhaul its waste paper sorting system. As a result, one of the most advanced paper sorting systems in Europe has been developed. Using a moisture measurement system from BAVARIA and the PMCS system from Redwave, ROWE has access to the latest grades of deinking at all times.”
Hanke continues, “Due to the ingenious plant concept from Entsorgungstechnik Bavaria GmbH, ROWE can react quickly to changes within minutes and can, therefore, always maintain a consistently high quality level, independent of fluctuations in input. This is a real innovation in the sector and has become an indispensable tool for ROWE.”
After further mechanical separation of medium cardboard, a Redwave sorting machine is installed in each line, which separates brown, gray and printed cardboard, as well as contaminants such as Tetra Pak containers and plastics from the deinking material by means of near-infrared (NIR) technology. A variety of sorting programs can be flexibly, quickly and easily set, the company says. Furthermore, the software of the sorting machine programs can be readily “taught” and expanded at any time according to market demand or customer requirements, Redwave says.
A third Redwave sorting system ensures high output rates and takes over the postsorting of the spilled contaminant fractions. This machine performs a type of monitoring function and is responsible for returning deinking from the output streams of the optical sorting machines to the paper cycle as part of a positive resorting stage. The deinking rate can be increased by several percent.
ROWE Managing Director Christian Ascherl-Landauer adds, “As a service partner for the city of Nuremberg, the local region and the paper industry, it is part of our obligation to continuously come forward with technology innovation and approaches that are sustainable. The direction for the future of waste paper sorting has now been set, so that ROWE GmbH can continue to be a significant partner for the paper industry. Due to the long-standing cooperation and trust developed with Redwave and Entsorgungsstechnik Bavaria, we wanted to implement this large-scale project together. We have received excellent and ongoing support from initial planning to final assembly.”