Low-temperature-freezing recycling treatment method for cadmium telluride thin-film solar cell

Abstract

The invention discloses a low-temperature-freezing recycling treatment method for a cadmium telluride thin-film solar cell. The method includes two major steps of stripping a photovoltaic film layer and dissolving and recycling valuable metal, and specifically includes the steps of removing backboard glass and electroconductive poles of a scrapped cadmium telluride thin-film solar cell to obtain aglass substrate with a photovoltaic film layer, freezing the glass substrate with the photovoltaic film layer at the lower temperature of minus 10 DEC G for more than 200s, washing the frozen glass substrate through high-pressure water jetting after taking out the same, allowing the photovoltaic film layer to be gradually separated from the glass substrate, gathering the washing water together, performing filtration to obtain a photovoltaic film layer filter cake, and recycling the valuable metal from the filter cake. The method has the advantages that the recovery rate of the valuable metalis high, the working environment is good, backboard and substrate glass can be recycled, the comprehensive utilization rate is high, the material recovery rate and the recovery effect of the cadmium telluride thin-film solar cell are improved, the resource utilization rate is increased, and environmental friendliness of a product chain is guaranteed throughout the process.

Description

technical field [0001] The invention relates to a low-temperature freezing recycling treatment method for cadmium telluride thin-film solar cells, and belongs to the technical field of thin-film photovoltaic module recycling. Background technique [0002] As traditional energy sources are gradually exhausted and environmental problems are intensifying year by year, new energy sources have gradually become the mainstream of energy strategies in various countries. Among them, the thin-film photovoltaic industry occupies an important position in new energy sources. Thin-film solar cells use semiconductor materials as the medium to achieve direct conversion of light and electricity. When sunlight hits the solar panel, it can directly convert sunlight energy into electrical energy without mechanical transmission and polluting by-products. [0003] At present, in the photovoltaic market, cadmium telluride thin-film solar cells have been widely used in photovoltaic power generation...

AI Technical Summary

Problems solved by technology

The initial equipment investment of this process is relatively small, and the process is relatively simple, but the working environment is relatively poor

The generated glass slag has little utilization value, and the disposal and piling and environmental protection pressure are relatively high

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