How to recycle solar photovoltaic panels after they are scrapped?
Billions of solar panels around the world will soon be obsolete, but when they do so, many important raw materials are also discarded, which can be used to produce new panels in the future.
A lot of scrapped solar panels
Solar panels can convert light energy into electrical energy, which brings great convenience to outdoor lighting. As a new energy source, solar energy greatly reduces environmental pollution, but at the same time it may involve another problem. That is, the equipment that utilizes these new energy sources, such as damaged and scrapped solar panels, has caused new pollution? This involves the recycling of solar panels, so how to recycle the scrapped solar photovoltaic panels? use it?
Solar photovoltaic panels are mainly composed of five parts: aluminum frame, cover glass, battery, backplane, and EVA (vinyl acetate) film. After waste photovoltaic panels enter the recycling process, they will go through processes such as destroying EVA film, dismantling components, and metal extraction and purification. For example, the core material crystalline silicon can be reused in the heavy metal industry, the glass panel can be sent to the glass manufacturing industry, the aluminum frame can be sent to the aluminum refinery, and after the cables and joints are crushed, they can be used in the form of copper beads. The form can be reused, and waste plastics can be used as fuel... So as long as the solar panels are disposed of properly, there is no need to worry too much about new pollution to the environment or waste of resources after the solar panels are scrapped. Recycling equipment can recycle and reuse photovoltaic panels very well without causing pollution. The following is a formal introduction to this specific process:
Recycling Flowchart of End-of-life Solar Batteries
Specific process: one is to remove the glass on the photovoltaic panel; the second step is to disassemble and remove the backplane and wires; the third step is to break the component and remove the outer tempered glass; the fourth step is to pyrolyze, this step The main purpose of EVA is to dissolve EVA; the last step is extraction to remove valuable metals and silicon materials from the components. It has been officially put into operation and can dismantle, sort, process and recycle 95% of the materials in crystalline silicon photovoltaic panels: 2/3 of the glass is recycled into broken glass and sent to the glass factory; the aluminum frame is It is sent to aluminum refineries; waste plastics can be used as fuel in cement plants; the recovered silicon can be reused in the precious metals industry; and the remaining cables and connectors are crushed and sold as copper beads.
This treatment process can dismantle, sort, process and recycle 95% of the materials in crystalline silicon photovoltaic panels: 2/3 of the glass is recycled into cullet and sent to glass manufacturers; goes to aluminum refineries; waste plastics can be used as fuel in cement plants; recycled silicon can be reused in the precious metals industry; leftover cables and connectors are crushed and sold as copper beads. Maximize the recycling of scrapped photovoltaic panels.
The above is the relevant introduction of solar cell recycling. Crystalline silicon solar cells have always dominated the photovoltaic market. Crystalline silicon solar cell photovoltaic system mainly contains materials such as silicon, aluminum, silver, copper, glass and plastic. Among them, polysilicon, the main part of the battery, has a high recycling value, and the recycling value of other materials such as aluminum backplane, silver grid wire, tinned copper wire and glass cannot be underestimated.
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