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Resource recycling treatment system and process for waste liquid crystal display panel

A technology for recycling and processing liquid crystal panels, which is applied in the field of waste liquid crystal panel resource recycling and processing systems and processes, can solve the problems of failing to meet display application requirements, low purity of recycled liquid crystals, etc., and achieves low energy consumption, stable and reliable performance of process equipment. , the effect of saving resources

Pending Publication Date: 2022-07-29
安徽美兴环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been relevant reports on liquid crystal panels. For example, Zhang Gang and Xu Jinqiu used the surfactant sodium dodecyl sulfate (SDS) as a cleaning agent to successfully remove liquid crystals from waste liquid crystal panels. However, the wastewater polluted by surfactants will Produced; Zhu Hubing and others used the ultrasonic-assisted-organic solvent immersion combined process to recover liquid crystals, the recovery rate of liquid crystals was only 50%, and the purity of recovered liquid crystals was low, which failed to meet the requirements of display applications; The removal of liquid crystal in the panel, but SO will be generated after thermal precipitation treatment 2 , HCl and other acid gases

Method used

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  • Resource recycling treatment system and process for waste liquid crystal display panel
  • Resource recycling treatment system and process for waste liquid crystal display panel
  • Resource recycling treatment system and process for waste liquid crystal display panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1, the 200kg liquid crystal panel is transported to the first crusher 2 through the first conveying unit 1, and crushed into crushed materials of 20-30 mm, and the crushed materials are transported to the liquid crystal extraction equipment 4 through the second conveying unit 3. % liquid crystal extracting agent (ethanol) for liquid crystal extraction and cleaning, the mixed solution after cleaning is used to extract the liquid crystal through the extraction agent (diethyl ether), the cleaning solution after the extraction is reused, and the extraction agent containing the liquid crystal obtained by extraction is in the distillation device 6. The product liquid crystal is obtained by distillation at 30° C., and the liquid crystal extraction rate reaches 68%. After the cleaned crushed material is air-dried and dehydrated, it is transported to the second crusher 8 through the third conveying unit 7 for secondary crushing, and the crushing size is 2-3 mm. A vibrati...

Embodiment 2

[0044] Example 2, the 200kg liquid crystal panel is transported to the first crusher 2 through the first conveying unit 1, and crushed into crushed materials of 20-30 mm, and the crushed materials are transported to the liquid crystal extraction equipment 4 through the second conveying unit 3, and at 10 % liquid crystal extraction agent (ethylenediamine: ethyl acetate = 1:2) to extract and clean the liquid crystal, and the mixed solution after cleaning is used to extract the liquid crystal through the extraction agent (kerosene: cyclohexane = 2:1). After the extraction The cleaning solution obtained is reused, and the liquid crystal-containing extractant obtained by extraction is distilled at 35° C. in the distillation device 6 to obtain the product liquid crystal, and the liquid crystal extraction rate reaches 94%. After the cleaned crushed material is air-dried and dehydrated, it is transported to the second crusher 8 through the third conveying unit 7 for secondary crushing,...

Embodiment 3

[0045] Embodiment 3, the 200kg liquid crystal panel is transported to the first crusher 2 through the first conveying unit 1, and crushed into crushed materials of 20-30 mm, and the crushed materials are transported to the liquid crystal extraction equipment 4 through the second conveying unit 3, and at 15 % liquid crystal extraction agent (cyclohexane: ethylenediamine: propyl acetate = 1:1:1) to extract and clean the liquid crystal, and the mixed solution after cleaning is used for the liquid crystal extraction agent (ethyl acetate: kerosene = 2:1). Extraction is carried out, the cleaning liquid after extraction is reused, and the liquid crystal-containing extractant obtained by extraction is distilled at 40° C. in the distillation device 6 to obtain product liquid crystal, and the liquid crystal extraction rate reaches 98%. After the cleaned crushed material is air-dried and dehydrated, it is transported to the second crusher 8 through the third conveying unit 7 for secondary...

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Abstract

The invention discloses a waste liquid crystal panel resource recycling treatment system and process, the system comprises a first crushing system, a liquid crystal recycling treatment system, a panel recycling treatment system and a dust removal system which are arranged in sequence, and a first conveying system is arranged between the first crushing system and the liquid crystal recycling treatment system; a second conveying system is arranged between the liquid crystal recovery processing system and the panel recovery processing system, the liquid crystal recovery processing system comprises liquid crystal extraction equipment and a liquid crystal recovery processing device arranged corresponding to the liquid crystal extraction equipment, and the input end of the liquid crystal extraction equipment is arranged corresponding to the first conveying system; the first crushing system and the panel recovery processing system are both communicated with the dust removal system, and a liquid crystal extraction agent is arranged in the liquid crystal extraction equipment. The waste liquid crystal panel recycling device is compact in structure, stable in performance and easy to operate, harmless and green recycling treatment of waste liquid crystal panels is achieved, the recycling efficiency of the waste liquid crystal panels is improved, and the production cost of the waste liquid crystal panels is reduced.

Description

technical field [0001] The present invention relates to the technical field of environmental protection and resource recovery, in particular to a system and process for recycling and processing waste liquid crystal panels as resources. Background technique [0002] LCD monitors are widely used in desktop computer monitors, LCD TVs, notebook computers, mobile phones, tablet computers and other terminal electronic display devices due to their advantages such as thin body, power saving, no high temperature, no radiation, soft picture and no eye damage. middle. However, with the development of society, the social ownership and scrapping of LCD TVs in my country are increasing year by year. How to realize the recycling of waste LCD panels is one of the current research hotspots. The composition of discarded LCD panels is complex, and it is difficult to ensure product quality by simple treatment. At this stage, domestic related industries are generally dominated by landfill or in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/35B09B3/30B02C21/00B02C23/14B01D11/02B01D50/00B09B101/15
CPCB09B3/00B02C21/00B02C23/14B01D11/02B01D50/00
Inventor 陈永翔陈冉纪晓康范新树纪家兵苑文仪黄庆刘晓霞
Owner 安徽美兴环保科技有限公司