Waste Sorting System Using Density-Based Liquid Separation
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Solution Overview
Problem
Current industrial waste sorting systems are inefficient in separating plastics and other materials into chemically and physically homogeneous families, requiring specialized companies and involving high costs and significant human intervention, especially when sorting unseparated waste masses.
Innovation Solution
A waste sorting system comprising a tank and a sorting unit with multiple sorting stations connected by conveyors, using liquid solutions of varying densities to separate materials based on Archimedes' principle, with scraper and wash mechanisms to collect and purify the sorted phases, and optional surfactants and antifouling agents to enhance the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional waste sorting methods are used to separate plastics and materials into homogeneous families, then sorting precision can be improved, but device complexity and human intervention requirements increase significantly
Solution Approach 1:
The patent changes the physical parameter of density by using liquid solutions with specific densities to separate waste materials. Materials are sorted based on their density differences, with lighter materials floating and heavier materials sinking, achieving homogeneous separation without complex mechanical systems
Solution Approach 2:
The patent employs hydraulic principles by using liquid solutions in sorting basins to achieve material separation. The liquid medium creates buoyancy forces that automatically separate materials based on density, replacing complex mechanical sorting devices with a simpler hydraulic system
2Measurement precision
If traditional waste sorting systems are implemented, then material separation can be achieved, but processing time and operational costs increase
Solution Approach 1:
The patent replaces complex mechanical sorting systems with a density-based liquid separation system. Materials are automatically separated by their buoyancy characteristics in liquid solutions, eliminating the need for time-consuming mechanical handling and manual sorting operations
Solution Approach 2:
The sorting system utilizes the inherent density properties of materials to perform self-separation. When waste materials are introduced to the liquid solutions, they automatically float or sink based on their density, requiring minimal external intervention and reducing processing time
3Measurement precision
If specialized companies are used for sorting specific plastic materials, then sorting precision improves, but operational complexity and costs increase
Solution Approach 1:
The patent creates a universal sorting system that can handle multiple types of plastics and materials through a single integrated setup. By using multiple liquid solutions with different densities, the system achieves homogeneous separation of various materials without requiring specialized equipment for each material type
Solution Approach 2:
The patent segments the sorting process into multiple stages, with each sorting basin containing liquid solutions of different densities. Each stage separates materials based on specific density ranges, progressively achieving homogeneous families of materials through sequential separation steps
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
Enables efficient separation of inert materials and plastics with minimal human intervention and reduced costs, achieving effective recycling by sorting materials into distinct phases with high precision and efficiency.
Implementation Method 1
a first sorting basin (14) containing a first liquid solution (L1) of given density to separate, according to Archimedes' principle, said recyclable material (RM) into a first phase (F1) of first selection and a second phase (F2) of first submersion
Data Source
AI summary
A waste sorting system (1) comprising a tank (S) for collecting recyclable material (RM) and a sorting unit (U) comprising a first sorting station (10) connected to the tank (S) through a transport device (12) of the recyclable material and a first sorting basin (14) containing a first liquid solution (L1) of given density to separate, according to Archimedes' principle, the recyclable material (RM) into a first material phase (F1) of first selection and a second material phase (F2) of first submersion; the first sorting basin (14) is delimited at the bottom by a first lower collection portion (140), the sorting unit (U) comprising first scraper means (16) associated with the first sorting basin (14) for collecting the first phase (F1) from a free surface of the first liquid solution (L1) and first wash means (18) of this first phase (F1); the first lower collection portion (140) being passed through by a first conveyor (11).