How to recycle waste solar photovoltaic panels?
Scrapped photovoltaic panels, photovoltaic panel components such as monocrystalline silicon and polycrystalline silicon, can be dismantled and recycled by solar panels, which can realize aluminum frames, tempered glass, silicon wafers, aluminum, Separate recycling of silver and copper. The method adopts a combined method of heat treatment technology and chemical method to realize waste crystalline silicon solar panel frame, glass recovery and silicon wafer separation, and valuable metal and silicon wafer recovery. It not only reduces the difficulty of recycling and processing, but also realizes the harmlessness of tail gas, prevents secondary pollution, and protects the environment; among them, the process of physical processing and crushing does not involve the environmental problems of chemical reagents and pyrolysis, conventional crushing and processing In this way, the processing of the whole process can be completed.
The main components of photovoltaic modules are glass, frame, battery sheet, EVA film, and backplane. Among them, the main component of glass is silicon dioxide, and the secondary components are soda ash, limestone, magnesia, aluminum oxide, Glauber’s salt, carbon; EVA is mainly ethylene-vinyl acetate copolymer; the main components of cells are monocrystalline silicon and polycrystalline silicon. ;The main material of the frame is metal aluminum; the back plate is composed of two layers of PVF film and one layer of PET film. More than 90% of these materials can be recycled.
SUNY GROUP generally needs to go through four steps to recycle a discarded photovoltaic module:
1. To disassemble the components, remove the wire junction box;
2. It is to remove the four frames, and remove the four aluminum frame parts on the outer edge of the entire photovoltaic panel;
2. To remove glass components, the waste photovoltaic panel glass removal machine removes the outer toughened glass;
3. It is a crushing process, crushing photovoltaic panels, and taking out the metal copper and silicon materials in the components.
For waste solar panels, the double-sided glass can also be recycled and reused. The aluminum frame and junction box of the photovoltaic module are removed by physical separation, and then the frameless photovoltaic module is disassembled, and the tin-coated solder strip and glass particles are separated. The remaining parts Grinding is carried out again, and metal, silicon powder, back plate particles and EVA particles are obtained by electrostatic separation. This method obtains a mixture of different materials and realizes the full separation of single components. It has been applied and put into production in domestic and foreign markets. The current complete production line technology is mature and has reached automation.