Recycling method of CdTe solar cell module

A technology of solar cells and recycling methods, applied in the direction of electronic waste recycling, recycling technology, chemical instruments and methods, etc., can solve the problems of easy pollution of ion exchange columns, low treatment efficiency of low-concentration acid etching solution, and blockage, and achieve easy Achieve amplification, avoid clogging, and simplify the process

Inactive Publication Date: 2014-06-18
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of using a large amount of chemical precipitant in the existing recovery technology, the ion exchange column is ...

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  • Recycling method of CdTe solar cell module
  • Recycling method of CdTe solar cell module
  • Recycling method of CdTe solar cell module

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Experimental program
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Embodiment Construction

[0019] 1) Immerse 1 kg of CdTe solar cell glass assembly from which the EVA encapsulant has been removed in an acid etching solution containing sulfuric acid and hydrogen peroxide. The equilibrium concentrations of Cd and Te after two acid etching were 2274ppm and 2720ppm, respectively. figure 1 shown.

[0020] 2) Add the magnetic polymer microspheres into the secondary acid etching solution of CdTe, and after fully stirring for 10 minutes, use a magnetic separation device to separate the magnetic polymer microspheres whose surface has adsorbed Cd and Te elements. Investigating the removal ability of magnetic polymer microspheres to Cd and Te in 5mL CdTe secondary acid etching solution, it can be seen that: with the increase of the amount of adsorbent, the removal rate of Cd and Te is significantly improved; 100% Cd and 80% Te can be adsorbed separate, see figure 2 shown. After diluting the 5mL CdTe secondary acid etching solution 5 times with deionized water, add 2.5g mag...

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Abstract

The invention discloses a recycling method of a CdTe solar cell module. The recycling method is characterized in that the CdTe solar cell glass module of which EVA encapsulation adhesive is removed is dipped in a sulfuric acid/hydrogen peroxide solution to be subjected to adequate acid etching, Cd and Te elements are directly and quickly gathered from an acid etching solution of CdTe by using magnetic polymer microspheres, and obtained high-concentration Cd and Te acid etching solution can be further used for an electrolytic process. The recycling process has the characteristics of high gathering separation efficiency, simple technical process and easy amplification, and the magnetic polymer microspheres can be recycled.

Description

technical field [0001] The invention relates to the recycling technology of photovoltaic modules, in particular to a method for recycling and processing cadmium telluride thin-film solar cells. Background technique [0002] Cadmium telluride (CdTe) is a commercially available semiconductor material for solar energy conversion, with excellent light-absorbing properties and excellent module performance at high temperatures. In recent years, with the continuous improvement of CdTe battery technology, the conversion efficiency of its components has increased to 16.1% (0.72m 2 Modules), occupying the second largest market share of solar cells after crystalline silicon cells, and its module production capacity reached 1.8GW in 2012 p . EPIA predicts that by 2020, the market share of CdTe solar cells will exceed 10%. However, the rapid growth of production capacity will inevitably lead to two major problems: first, the potential harm of the toxic Cd element to the environment; s...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B17/00C01B19/00
CPCY02P10/20Y02W30/82
Inventor 张腾董泽斌古宏伟屈飞丁发柱彭星煜王洪艳
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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