Regenerative Energie
The use of electro-hydraulic comminution during mechanical treatment of secondary raw materials leads to a specific weakening of interfaces within the material.
This allows for separation by material that is largely independent of the degree of comminution. The result is high liberation of materials without excessive comminution. This technology is based on shock waves generated by pulsed high-voltage spark discharges. The shockwaves propagate through the surrounding liquid carrier medium and hit the material.These short, but very intense, mechanical impacts specifically attack weak spots within the material: Fragmentation occurs at macroscopic joints or microscopic interfaces. This article shows the use of this method based on the examples of delaminating decoration strips and fragmenting PCBs (printed circuit boards). A variety of technologies for the additional process stages of preconditioning and sorting are available on pilot-plant scale or are in the pipeline at Fraunhofer IWKS. Material can be classified using a multi-deck screening machine - e.g. separated into undersize and oversize particles. Ferrous and non-ferrous metals can be removed from the materialflow using traditional methods, such as magnetic and eddy-current separation. Preconditioned material can ultimately be separated into additional fractions with the help of asensor-based sorting unit. This sorting unit consists of an induction sensor, an optical CCD camera and a hyperspectral NIR camera. The use of these three sensors helps to separate material by metal content, colour, form, plastic type and other infrared-active components. A flexible combination of the individual technologies allows specific process chains to be developed for different material flows and areas of application. Operating parameters can be recorded and optimised by extensive crosslinking and data acquisition.This allows a detailed assessment of the process chain to be performed from an economic and ecological perspective.
| Copyright: | © Wasteconsult International |
| Quelle: | Waste to Resources 2017 (Mai 2017) |
| Seiten: | 11 |
| Preis: | € 0,00 |
| Autor: | Dr. Katrin Bokelmann Dr.-Ing. Thorsten Hartfeil Joachim Knierim Dr. Carsten Gellermann Prof. Dr. Rudolf Stauber |
| Artikel nach Login kostenfrei anzeigen | |
| Artikel weiterempfehlen | |
| Artikel nach Login kommentieren | |
Hochlauf der Wasserstoffwirtschaft
© Lexxion Verlagsgesellschaft mbH (8/2024)
Überblick über und Diskussion der Maßnahmen zum beschleunigten Ausbau
der Wasserstoffinfrastruktur in Deutschland
Die innerstaatliche Umsetzung des Pariser Klimaschutzübereinkommens
- ein Rechtsvergleich
© Lexxion Verlagsgesellschaft mbH (8/2024)
Like all public international law treaties, the Paris Climate Accords rely on national law for their implementation. The success of the agreement therefore depends, to a large extent, on the stepstaken or not taken by national governments and legislators as well as on the instruments and mechanisms chosen for this task. Against this background, the present article compares different approaches to the implementation of the Paris Agreement, using court decisions as a means to assess their (legal) effectiveness.
Klimaschutzrecht und Erzeugung erneuerbarer Energien in der Schweiz
© Lexxion Verlagsgesellschaft mbH (8/2024)
Verschachtelte Gesetzgebung unter politischer Ungewissheit