Kreyenborg: Process solutions for recycling a...

Process solutions for recycling and virgin materials

(Source: Kreyenborg)
(Source: Kreyenborg)

Recycling and the circular economy are the central topics to be discussed at the K 2022 trade fair in Düsseldorf/Germany from October 19-26, 2022. In addition to traditional bulk material solutions involving mixers and special silos for granulates and regrinds, at their stand the focus of Kreyenborg will be on cutting-edge applications in the form of process-engineering solutions, which center on infrared technology. Originally developed for pre-heating, crystallization, and drying of recycling and virgin materials, customized, individual infrared rotary drums are now available for other processing tasks in plastics recycling.
Comprehensive automated concepts for bulk material handling have traditionally been one of the core competencies at Kreyenborg GmbH & Co. KG, Senden/Germany. As an example, a 500-liter MBM high-speed mixer will be showcased at the stand. This mixer is ideally suited for gentle mixing of masterbatch, compounds, or glass fiber-reinforced granulates. These high-speed mixers meet the exacting requirements for gentle homogenization of granulates and regrinds with great mixing precision, as well as offering easy and fast cleaning capabilities. The mixer program is supplemented by special silo and dosing solutions for bad flowing, light recycling materials such as fibers, flakes or film chips.
The IRD infrared rotary drum product family is headlined by the continuously operating IRD, which showcases the process engineering possibilities of this unique technology. It provides the ideal preliminary phase in the extrusion process for the crystallization and drying of polyethylene terephthalate (PET) flakes and granules. Short residence times with simultaneously low energy consumption are achieved by rapid heating using direct heat input from the infrared emitters. Concurrently, continuous mixing in the rotating drum also opens up further applications in heating and drying, especially for regrinds from recycling.
The family of infrared technology systems is rounded out by the discontinuously operating IR-Batch. It ensures very gentle yet efficient treatment of material. Whether plastic granules need to be heated, crystallized, dried, or coated, the IR-Batch is very flexible, versatile, and easy to clean. Due to these design advantages, the exhibit on display is intended as a crystallizer for PET masterbatch. Thanks to very precise and individually adjustable temperature control, the granules can be crystallized gently but safely. Input of heat through infrared light is instantaneous, so that short process times of only 15-20 minutes are enabled. In addition to PET and PLA crystallization, other demanding applications can also be implemented with the IR-Batch – technical polymers such as PEEK, PAI or PEI can be treated, as can very moist or bridging materials, which means that the IR-Batch's range of applications begins where conventional drying has reached its limits.
Particularly for the decontamination of recycled PET flakes for food contact, the company has developed the IR-Clean system, while as a further innovation for the polyolefin recycling sector, the IR-Fresh concept for odor reduction of high-density polyethylene (HDPE) or polypropylene (PP) regrinds will be presented at the stand.
For individualized customer tests, the Kreyenborg Plastics Technical Center at the company's headquarters has the appropriate equipment available for tests tailored to each customer's specific needs.

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