Wind Tunnel Sorting of Automobile Shredder Residue
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Solution Overview
Problem
Current systems for recycling automobile shredder residue are inefficient in separating recyclable materials, often resulting in unclean and unusable products that end up in landfills due to the heterogeneous nature of the residue, which contains various substances like glass, fabric, metals, dirt, plastics, rubber, and trash.
Innovation Solution
A wind tunnel sorting system is introduced to effectively separate automobile shredder residue into recyclable materials by using horizontally laminar flowing air to influence the gravitationally driven descent of the residue, allowing for isotropic quantization and categorization of materials, and an air-locked system to manage potentially harmful substances like magnetic fuzz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional sorting systems (magnets, eddy current, air separation, flotation, screening, sensor sorting) are used to process automobile shredder residue, then some recyclable materials can be recovered, but the end products contain contaminants and are unclean, making them unusable and ending up in landfills
Solution Approach 1:
The patent divides the sorting process into multiple sequential stages: pre-sorting (removing ferrous metals), primary sorting (eddy current for non-ferrous metals), secondary sorting (flotation for plastics), and tertiary sorting (sensor-based sorting for contamination removal). Each stage targets specific material types and progressively purifies the recyclable streams, transforming the heterogeneous shredder residue into clean, usable recyclable products.
Solution Approach 2:
The patent implements pre-sorting operations before the main sorting process to remove ferrous metals and large contaminants. This preliminary action prevents these materials from interfering with subsequent sorting stages, improving the efficiency and purity of the final recyclable products while maximizing recovery rates.
2Productivity
If traditional sorting systems are used, then processing can be maintained at current levels, but recyclable components that could be reused end up as waste in landfills
Solution Approach 1:
The patent systematically recovers recyclable materials that would otherwise be discarded with the trash stream. By implementing multi-stage sorting with increasing purity levels, the system captures recyclable plastics, metals, and other materials from the heterogeneous shredder residue, diverting them from landfills and converting waste into usable recyclable products.
3Reliability
If traditional sorting systems are used, then the recycling process operates at current efficiency, but the recyclable products produced are unclean and unusable, reducing recycling efficiency
Solution Approach 1:
The patent segments the sorting system into specialized modules, each designed to handle specific material types and purity requirements. The pre-sorting module removes ferrous metals, the primary sorting module captures non-ferrous metals, the secondary sorting module recovers plastics, and the tertiary sorting module eliminates contaminants. This modular segmentation achieves high product quality while managing system complexity through functional specialization.
Solution Approach 2:
The patent introduces intermediate processing stages between the shredding operation and final product delivery. These intermediary sorting and purification steps progressively refine the recyclable materials, transforming contaminated mixtures into clean, usable products. The intermediate stages act as mediators that bridge the gap between heterogeneous input and high-quality output.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system significantly increases the recovery of recyclable materials, reducing waste and landfill content by producing cleaner, usable recyclable products, with enhanced efficiency in the recycling process by effectively separating and categorizing materials like zorba, zurik, and ferrous nuggets.
Implementation Method 1
horizontally laminar flowing air to influence the gravitationally driven descent of the residue
Implementation Method 2
gravitationally driven descent of the residue
Implementation Method 3
an air-locked system to manage potentially harmful substances like magnetic fuzz
Data Source
AI summary
Systems and methods for increasing recyclable material recovery from automobile shredder residue (4). Embodiments include separation of automobile shredder residue with a sorting system (5) such as an air sorting system, a non-ferrous automobile shredder residue air sorter, an air-locked automobile shredder residue sorting system, a non-magnetic magnetic sorter, a substantially isotropic quantization sorting system, an air-locked Z-box air classifier, low susceptance microparticle separator, a magnetic fuzz separator, a wind tunnel system, or the like perhaps with substantially horizontal laminar air flow (7) and can be used with or without out other traditional automobile shredder residue sorting systems (16) or (15) perhaps creating additional recyclable quantities and even better separated results such as with zorba and zurik and the like.