Recovery of waste crystalline silicon photovoltaic panels based on DMPU coupled pyrolysis
With the rapid development of the photovoltaic industry,China will usher in a peak period of photovoltaic module retirement,and the recovery market for waste crystalline silicon photovoltaic modules has broad prospects.Among them,recovery of complete silicon cells not only has environmental significance,but also has economic benefits.There are many problems with existing recycling methods such as pyrolysis,mechanical disassembly,and chemical dissolution.This article investigated the pre-treatment of N,N-dimethylpropenylurea(DMPU)coupled with pyrolysis for recovery of waste crystalline silicon photovoltaic panels.By exploring the effects of different DMPU pre-treatment conditions on the integrity rate,backplate removal rate,and different pyrolysis conditions on the integrity rate of silicon cells through experiments,it was found that the experimental conditions for achieving the highest integrity rate of silicon cells were first treated with DMPU at 200℃ for 60min,followed by pyrolysis at 480℃ for 60min.The optimal experimental condition for removing the back panel was to treat the photovoltaic panel in DMPU at 200℃ for 30min.Finally,the energy consumption and carbon emissions analysis of the practical application of DMPU coupled pyrolysis for recovery of waste crystalline silicon photovoltaic panels showed that the method used in this article had significant energy-saving and emission reduction benefits.
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维普
