Waste Solar Panel Recycling Through Crushing And Dry-Furnace Smelting
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Solution Overview
Problem
Existing methods for recycling solar panels are inefficient, with most panels being landfilled and only aluminum frames being recycled, while valuable components like silicon, copper, and silver are difficult to recover, necessitating a method for large-scale automated recycling.
Innovation Solution
A method involving crushing, frame removal, and smelting processes to recover valuable metals from waste solar panels, using a dry furnace to replace silicon dioxide flux and recover silver and copper by inputting crushed materials into a smelting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual separation and landfilling methods are used for waste solar panels, then processing simplicity is maintained, but resource recovery efficiency and environmental sustainability deteriorate
Solution Approach 1:
The waste solar panel is divided into distinct components (glass substrate, solar cells, adhesive layer, metal frame) through systematic separation processes. The glass substrate is separated from solar cells using adhesive removal, and solar cells are further processed to extract valuable metals like silicon, copper, and silver. This segmentation enables efficient resource recovery while maintaining processability.
Solution Approach 2:
The invention employs parameter changes in the form of temperature control during adhesive removal and chemical treatment during metal extraction. By adjusting processing parameters such as heating temperature and chemical concentration, the method optimizes the separation and recovery efficiency of different materials from the solar panel, transforming waste into recoverable resources.
2Device complexity
If only aluminum frames are recycled while other components are landfilled, then processing complexity is minimized, but material loss and environmental impact increase
Solution Approach 1:
The recycling system is designed to handle multiple material types (glass, metals, adhesives) through a single integrated process flow. The same processing line performs frame removal, adhesive degradation, glass separation, and metal extraction, making the system universally applicable to various solar panel compositions without requiring separate specialized processes for each material type.
Solution Approach 2:
The invention systematically recovers valuable materials that would otherwise be discarded. The metal frame is separated and recovered, the glass substrate is cleaned and reused, and precious metals (silver, copper, silicon) are extracted from solar cells through chemical and physical processing. This comprehensive recovery approach minimizes material loss while managing processing complexity through standardized procedures.
3Quantity of substance
If complex processes are used to separate valuable metals from solar cells, then metal recovery completeness is improved, but processing time and operational complexity increase
Solution Approach 1:
The method performs preliminary actions by first removing the metal frame and then degrading the adhesive layer before solar cell processing. This preliminary separation of components prepares the solar cells for efficient metal extraction, reducing the complexity and time required for subsequent metal separation processes. The adhesive removal step particularly facilitates easier access to solar cell materials for rapid processing.
Solution Approach 2:
The invention replaces complex mechanical separation methods with chemical and thermal processes for metal extraction. Instead of using elaborate mechanical sorting and separation equipment, the method employs controlled chemical treatments and heating to dissolve and separate metals from solar cell materials, achieving high recovery completeness with simpler, faster processing.
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 recovery of valuable metals like silver and copper from waste solar panels, reducing the need for external flux input and facilitating large-scale recycling.
Implementation Method 1
a dry furnace input process of inputting a final crushed material from which the frame has been removed into a dry furnace of a smelting process
Implementation Method 2
the frame removal process is performed by a eddy current separator
Data Source
Figure 1~2
AI summary
According to the one embodiment of the present invention, a method of recycling a waste solar panel including a glass substrate, solar cells, an adhesive layer provided between the glass substrate and the solar cells to bond the glass substrate and the solar cells, and a metal frame configured to fix a laminated structure of the glass substrate, the adhesive layer, and the solar cells, the method comprising: a crushing process of crushing the waste solar panel into a predetermined size or less; a frame removal process of sorting and removing the frame contained in the crushed material crushed by the crushing process; and a dry furnace input process of inputting a final crushed material from which the frame has been removed into a dry furnace of a smelting process.