Solar Panel Delamination via Pyro-Gasification Recycling
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Solution Overview
Problem
Existing recycling processes for photovoltaic panels are energy-intensive, environmentally harmful, and inefficient in recovering high-value materials due to the challenges in separating and recovering polymers like EVA, leading to high energy consumption and toxic emissions.
Innovation Solution
A pyro-gasification process is employed to decompose organic materials at lower temperatures, allowing the separation of encapsulating elements like EVA from the operating layer without complete combustion, followed by pyro-metallurgical processes to recover metals, reducing energy consumption and emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional thermal processes are used to decompose polymer components at high temperatures, then complete decomposition of EVA is achieved, but energy consumption increases significantly and toxic emissions are generated
Solution Approach 1:
The patent changes the temperature parameter from conventional high temperatures (above 550°C) to moderate temperatures (400-600°C), and modifies the atmospheric conditions by introducing specific gases (CO2, steam, nitrogen) to create a controlled decomposition environment. This parameter change enables EVA decomposition without complete combustion, reducing energy consumption and preventing toxic emissions while achieving effective polymer decomposition and material separation.
2Ease of manufacture
If high-temperature thermal processes are used to separate and recover materials, then complete decomposition of organic materials is achieved, but the process becomes energy-intensive and environmentally harmful
Solution Approach 1:
The patent introduces intermediary substances (CO2, steam, nitrogen) that mediate the decomposition process. These intermediaries facilitate EVA breakdown at lower temperatures by providing a controlled chemical environment, enabling effective material separation without requiring high-temperature combustion. The intermediaries act as heat transfer media and chemical reactants that enable decomposition while preventing harmful emissions.
3Loss of substance
If conventional pyro-metallurgical processes are used to recover metals, then high-value materials are recovered, but energy consumption and environmental impact increase
Solution Approach 1:
The patent creates an inert or controlled atmosphere using CO2, steam, and nitrogen during the thermal processing stage. This controlled environment prevents complete combustion and toxic emissions while enabling effective decomposition of organic materials. The inert atmosphere approach allows for material recovery without the harmful environmental impacts associated with conventional open combustion processes, maintaining material recovery efficiency while reducing environmental damage.
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 process achieves efficient recovery of high-value materials with reduced energy costs and environmental impact by minimizing toxic emissions and simplifying the separation of recyclable materials.
Implementation Method 1
A pyro-gasification process is employed to decompose organic materials at lower temperatures, allowing the separation of encapsulating elements like EVA from the operating layer without complete combustion
Implementation Method 2
followed by pyro-metallurgical processes to recover metals, reducing energy consumption and emissions
Data Source
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AI summary
A process for recycling a solar panel (10), and apparatus which carries it out, wherein the solar panel (10) has an operating layer (15) to which a contaminating encapsulating element (13) is adhesively bonded. The recycling process comprises a step A which provides for subjecting the solar panel (10) to a thermal processing operation which provides for heating the solar panel (10) to a processing temperature for such a processing time that the encapsulating element (13) reaches such a softening state as to be able to be delaminated from the operating layer (15).