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Method for recycling and utilizing CdS waste liquor produced in production process of copper indium gallium selenide (CIGS) film solar cell

A thin film solar cell, copper indium gallium selenide technology, applied in chemical instruments and methods, energy waste water treatment, cadmium sulfide and other directions, can solve problems such as environmental pollution, and achieve the effect of reducing energy consumption and saving industrial water

Active Publication Date: 2013-01-23
ZHEJIANG SHANGYUE OPTOELECTRONICS TECH
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Problems solved by technology

But above-mentioned processing method needs to add vulcanizing agent, and excessive vulcanizing agent also needs to add ferrous sulfate to get rid of, has caused the pollution of environment

Method used

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  • Method for recycling and utilizing CdS waste liquor produced in production process of copper indium gallium selenide (CIGS) film solar cell
  • Method for recycling and utilizing CdS waste liquor produced in production process of copper indium gallium selenide (CIGS) film solar cell
  • Method for recycling and utilizing CdS waste liquor produced in production process of copper indium gallium selenide (CIGS) film solar cell

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Embodiment 1

[0027] The present invention will now be further described in detail with reference to the accompanying drawings. figure 1 , 2 , The specific implementation is:

[0028] Filter out the cadmium sulfide CdS in the waste liquid: The CdS waste liquid produced in the production of CIGS thin film solar cells is filtered through a buffer tank and then filtered through a secondary filter to filter out CdS particles in the waste liquid. , The secondary filter contains two separation membranes with different pore sizes, the first one is a 400 nm pore size filter membrane, and the second is a 250 nm pore size filter membrane. Yellow waste liquid containing cadmium sulfide, such as figure 2 As shown, after filtering through the secondary filter, the unique Tyndall effect of the colloidal solution can be clearly observed. After the first filter membrane is filtered, the solution becomes clear and the Tyndall phenomenon is faintly visible, such as image 3 Shown. After filtering through the...

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Abstract

The invention discloses a method for recycling and utilizing CdS waste liquor produced in the production process of a copper indium gallium selenide (CIGS) film solar cell, wherein the method comprises the following steps of: (1) filtering the cadmium sulphide in the waste liquor; (2) performing oxidation treatment; (3) adsorbing the waste liquor with an active carbon filter; (4) carrying out ion exchange adsorption; (5) monitoring the waste liquor subjected to the ion exchange adsorption; and (6) vaporizing and concentrating the waste liquor. The method provided by the invention has the beneficial effects that a large number of industrial wastewater comprising CdS particles produced in the production process of the CIGS film solar cell is subject to a multi-stage continuous waste liquor treatment processes such as secondary filtering, oxidation treatment, activated carbon adsorption, ion exchange, back penetration and concentration evaporation, thereby realizing the zero discharge of the cadmium-containing industrial wastewater and effectively saving the industrial water; the filtering membrane and the ion exchanging agent in the treatment device are periodically recycled and exchanged to effectively reduce the energy consumption in the treatment of the waste liquor.

Description

technical field [0001] The invention relates to a method for recycling industrial waste liquid in the technical field of solar power generation, in particular to a method for recycling CdS waste liquid produced in the production process of copper indium gallium selenium CIGS thin film solar cells. Background technique [0002] Copper indium gallium selenium CIGS thin-film solar cells have become the current industry and research institutions' contention due to their advantages such as high absorption rate, adjustable band gap, low cost, high conversion rate, good low light performance, stable performance and strong radiation resistance. The focus of phase development. In recent years, under the background of its excellent performance and huge demand, many companies and institutions around the world, including the US renewable energy laboratory NREL, Solar Frontier, Miasole, Global solar, Wurth Solar, etc., have invested huge financial resources and manpower in research and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01G11/02C02F1/72C02F1/28C02F1/42
CPCY02W10/37
Inventor 任宇航罗派峰王义陈宁
Owner ZHEJIANG SHANGYUE OPTOELECTRONICS TECH
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