Kreyenborg Plant Technology GmbH, based in Senden, Germany will be putting particular focus this year on a range of topics regarding drying and crystallising, as well as comprehensive solutions for bulk-material handling processes. The Infrared Rotary Dryers IRD is used for crystallising and drying virgin or regrind materials for a number of plastics, including PET. Through the use of the continuously functioning IRD, the need for energy-intensive processing using dry air is said to be completely eliminated.
The raw material is heated directly with infrared light that works especially gently, so that the vaporising moisture is diverted from the core of the material toward the outside. The raw material is conveyed evenly through the machine, and, by the rotating of the drum, carefully circulated and evenly heated. This eliminates clumping. The low rotation speed prevents breaking, abrasion and the raising of dust from the product.
For the first time, Kreyenborg are presenting their new PET-BOOSTER. This continuously operating system dries PET within 7-10m. The focus here is specifically on applications in the extrusion of plastic films and fibres with degassing extruders. Varying levels of input moisture that results in process fluctuations in the extrusion process (as well as fluctuations in end-product quality) can be eliminated with the Kreyenborg PET-BOOSTER. By feeding pre-heated material with a consistent, low input moisture level, a smaller extruder and vacuum degassing system can be used.
Among the company’s new exhibits is a pneumatic conveying system. Thanks to many years’ experience with the conveying of poorly- flowing bulk materials, as for example bottle flakes or film flakes, that still present a challenge to the industry, Kreyenborg has incorporated hopper loaders into the process. The conveyers are distinguished by their container geometries that avoid bridging or that even have internal bridge-breakers. The containers come standard with an extremely large outlet. The conveyors have a compact central filter unit with a large filter area, to meet the requirements for dusty regrind materials.