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Plasma etching enhanced ternary mixed plastic flotation separation method

A plasma and mixed plastic technology, which is used in the flotation separation of plastic mixtures, and plasma etching as a pretreatment field, can solve the problems of low efficiency of manual sorting, and achieve the advantages of easy popularization and application, industrialized large-scale application, and simple operation. Effect

Inactive Publication Date: 2021-04-20
BAOJI UNIV OF ARTS & SCI
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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for plasma etching enhanced flotation separation of ternary mixed plastics to solve the problem of low efficiency in manual sorting, so as to realize the waste of common ternary mixed plastics substances to achieve rapid and efficient separation and recovery

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  • Plasma etching enhanced ternary mixed plastic flotation separation method
  • Plasma etching enhanced ternary mixed plastic flotation separation method

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Embodiment Construction

[0028] The present invention will be further described in detail through specific embodiments below. However, those skilled in the art will understand that the following examples are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. The reagents or instruments used were not indicated by the manufacturer, and they were all commercially available conventional products.

[0029] Such as figure 1 As shown, the method technology of the present invention comprises seven core process links including pretreatment 1, pretreatment 2, plasma etching 1, flotation unit 1, pretreatment 3, plasma etching 2 and flotation unit 2; The seven process links are connected in series and can be operated continuously online; the ternary mixed plastics fed into the pretreatment 1 include polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE) and propylene from different sources and mass ratios. Nitrile / butadiene / styrene...

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Abstract

The invention belongs to the technical field of solid waste pollution control and recycling, and provides a plasma etching enhanced ternary mixed plastic flotation separation method. The method comprises seven core process links including pretreatment 1, pretreatment 2, plasma etching 1, a flotation unit 1, pretreatment 3, plasma etching 2 and a flotation unit 2. The seven process links are sequentially connected in series and can be continuously operated on line; ternary mixed plastic fed in the pretreatment step 1 comprises PMMA, PTFE and ABS from different sources; sinking tailings 1 of the flotation unit 1 are the separated PMMA; sinking tailings 2 of the flotation unit 2 are the separated PTFE; and a floating product 2 of the flotation unit 2 is the separated ABS. The method is simple in process, relatively mild in process, free of a high-temperature pressurizing link and high in separation safety and efficiency.

Description

technical field [0001] The invention belongs to the technical field of solid waste pollution prevention and resource utilization, in particular, it relates to a plastic mixture flotation separation technology, in particular to a method of using low-temperature plasma etching as pretreatment to selectively enhance the flotation separation ability of mixed plastics Methods. Background technique [0002] At present, the economic and environmental losses caused by waste plastics are becoming more and more serious, and its proportion in general solid waste continues to grow, and resource disposal has attracted widespread attention. Mixed plastics of a single species can be recycled as materials through a simple reshaping process, or cracked to monomers that participate in chemical cycles. However, waste plastics collected from common solid waste streams often have obvious accompanying relationships. If they are not separated and enter the recycling stage, heterogeneous component...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/02B29B17/00B29K27/18B29K55/02B29K33/04
CPCY02W30/62
Inventor 赵钺韩凤荣郭林奕王辉周进宏雷霁
Owner BAOJI UNIV OF ARTS & SCI
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