Turf Infill Screening for High-Purity Dry Sand and Rubber Separation
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Solution Overview
Problem
Existing methods for recycling synthetic turf infill materials, such as sand and rubber, are inefficient and unsuitable for separating individual components with high purity, leading to environmental concerns and resource wastage.
Innovation Solution
A method and system for separating dry or dried infill from artificial turf into multiple fractions using pre-analysis to determine optimal separation screens based on particle size and specific gravity, followed by a screening process to achieve high purity fractions of sand, styrene-butadiene rubber, and other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional carpet recycling processes are used for synthetic turf, then the process is simple and familiar, but the separation purity is low and individual components cannot be recovered
Solution Approach 1:
The recycling process is divided into multiple sequential separation stages, each targeting specific infill materials with different properties. The first separation unit handles heavy materials like sand and metal, the second handles lighter materials like rubber and plastic, and the third handles organic materials. This segmented approach achieves high purity separation (95% or higher) of individual components while maintaining manageable process complexity through modular design.
2Reliability
If infill is not separated before recycling, then the process is simpler, but the final product quality is poor and environmental harm increases
Solution Approach 1:
The system performs preliminary separation of infill materials from turf fibers before the main recycling process. By removing infill materials (sand, rubber, metal, organic matter) in advance through three sequential separation units, the system ensures high purity of recovered components and prevents contamination in the final recycled products, thereby improving both product quality and recycling efficiency.
3Ease of operation
If water-based separation methods are used, then the separation process is simpler, but natural resource consumption increases and environmental impact worsens
Solution Approach 1:
The system replaces water-based separation methods with mechanical separation systems that use vibrating screens and airflow. The first separation unit uses heavy material separation, the second uses light material separation, and the third uses organic material separation. These mechanical methods achieve effective infill removal without significant water consumption, maintaining operational ease while eliminating resource loss and environmental harm.
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 achieves fractions with purity exceeding 95% (w/w), enabling efficient recycling and reuse of turf components without relying heavily on natural resources like water, and accommodating varying turf compositions.
Implementation Method 1
separating the infill into a plurality of analysis fractions based on particle size and/or specific gravity by a pre-analysis unit
Implementation Method 2
separating the infill into a plurality of analysis fractions based on particle size and/or specific gravity by a pre-analysis unit
Implementation Method 3
separating the infill into a plurality of fractions by a screening means having a plurality of separation screens
Data Source
AI summary
A separation system suitable for separating a dry or dried infill preferably including rubber and/or sand, into a plurality of fractions, the separation system includes a first screening means configured to receive a first set of separation screens said set of separation screens being configured to separate infill into a first plurality of fractions, wherein the separation system further includes a pre-analysis unit, a database and a processing unit configured to calculate correlation coefficients and/or deviation values between the first set of composition values and a plurality of second sets of composition values of the database; and a method for separating a dry or dried infill having a composition of materials, preferably including rubber and sand, into a plurality of fractions.