Silicon solar cell texturization waste liquid recycling method

A silicon solar cell and waste liquid recycling technology, which is applied in the fields of energy and wastewater treatment, chemical instruments and methods, fluorosilicic acid, etc. Effect

Inactive Publication Date: 2017-09-01
ZHEJIANG DONGFU PLASTIC SCI & TECH
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it brings solid waste CaF2, causing new pollution, and the saturation solubility of Ca

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for recycling silicon solar cell texturing waste liquid, comprising the following steps:

[0016] The first step: the process of removing fluorosilicic acid, that is, putting the potassium salt or sodium salt into the reaction tank containing the waste liquid from texturing, and the weight ratio of the waste liquid to the added potassium salt or sodium salt is 1:1~ 1:1.5, the reaction is carried out at a temperature range of 10°C to 30°C, the materials are fully contacted by stirring or circulating with a pump for reaction, and then solid-liquid separation is carried out by filtration or centrifugation;

[0017] The second step: a purification process, the purification process is a process of purifying the above-mentioned treated waste liquid, and removing metal impurity ions by means of rectification.

[0018] As another improvement of the technical solution of the present invention, after the step 1, the step also includes:

[0019] HF / HNO3 separation proces...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a silicon solar cell texturization waste liquid recycling method. The method includes: fluosilicic acid removing, HF/HNO3 separation, purification and other processes, can acquire a chemical stock solution level single chemical or mixed chemical used for a texturization process, and basically reduces discharge of waste chemicals.

Description

technical field [0001] The invention belongs to the field of recycling chemical waste liquid, and in particular relates to a method for recycling silicon solar battery texturing waste liquid. Background technique [0002] The texturing process of silicon solar cells is the process of pre-cleaning the silicon surface and corroding it into a pyramid-like or honeycomb-like structure with strong alkali or strong acid. The chemicals used in alkali texturing are mainly sodium hydroxide or potassium hydroxide, isopropanol or ethanol, sodium silicate or suede additives; the chemicals used in acid texturing are mainly nitric acid and hydrofluoric acid. Texture making process includes steps such as texturing, pickling, alkali washing, drying, etc. The waste water and liquid generated in the production process are mainly acid-base waste water, hydrofluoric acid waste water, and organic waste water. The invention is a method for recycling waste liquid produced in the texturing process ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F9/10C01B7/19C01B21/46C01B33/10
CPCC01B7/196C01B21/46C01B33/103C02F1/001C02F1/04C02F1/38C02F9/00Y02W10/37
Inventor 何正纲王燕董杰翁露霞
Owner ZHEJIANG DONGFU PLASTIC SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap