The recycling and treatment of waste crystalline silicon solar cells has not received enough attention, and there are problems such as resource waste and environmental pollution. Because the cells mainly contain important raw materials required in the production process such as silicon, silver, and aluminum, we explore an environmentally friendly circular economy model based on this, and make full use of the metal value in the disposal process of crystalline silicon solar cells to recycle and treat crystalline silicon solar cells, so as to realize the reuse of silicon, silver, aluminum and other materials.
The composition of photovoltaic panels is very complex, interwoven with silicon, aluminum, copper, silver, lead and other materials. Photovoltaic panels are silicon-based photovoltaic components, mainly composed of tempered glass, ethylene-vinyl acetate (EVA), cells and junction boxes. The role of tempered glass is to protect the power generation body, that is, the cells. EVA is like glue to fix the tempered glass and cells together. The junction box is used as a current transfer station to protect the entire solar panel, and copper wires are coiled inside. Although from the perspective of material composition, waste solar panels can be said to be treasures everywhere and have great recycling and reuse value, it is a time-consuming, labor-intensive and technically challenging process to separate these materials one by one and process them separately. To achieve recycling, the junction box must be disassembled and the copper wire stripped so that the copper can be recycled after purification. Then the glass plate must be polished off the EVA. The ground glass powder can be reused in industry and construction, and then the silicon in the cell can be recycled.
The production line for recycling waste solar panels. The photovoltaic panel recycling equipment technology uses the advantages of physical processing and selective crushing to crush, dissociate and recycle high-value components of solar panels. The entire treatment process does not use chemical reagents, and no wastewater, waste liquid, waste gas and dust are generated, achieving harmless treatment process, low recovery yield and resource consumption. This technology breaks through the technical bottleneck of high energy consumption and high pollution of the original recycling method, and has the advantages of low environmental pollution, low energy consumption and high economic benefits. It provides a new solution for the environmentally friendly recycling of waste solar panels and has a large market space.
