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Method of recycling polyphenylene sulfide and PTFE waste filter materials

A polytetrafluoroethylene and polyphenylene sulfide technology is applied in the field of recycling polyphenylene sulfide and polytetrafluoroethylene waste and old filter materials, which can solve the problems of high price of dust removal bags, high unit price, and limited application of dust removal bags. Achieving the effect of good shape following and high elongation at break

Inactive Publication Date: 2016-07-13
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high unit prices of PPS materials and PTFE materials, this type of dust bag is also expensive, which limits the application of this type of dust bag to a certain extent.
In order to reduce the cost of use, it is imperative to recycle waste dust bags, but in the development of recycling technology, PTFE is difficult to handle. PTFE is commonly known as the king of plastics, and it does not change in boiling aqua regia
Therefore, due to the excellent chemical stability of PTFE, the existing technology cannot be recycled, so the waste dust bags can only be stored

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Collect the waste filter material of polyphenylene sulfide and polytetrafluoroethylene→cleaning→drying→segmentation to obtain a block filter material with a rule of about 300mm, weigh 22.3g of it and melt it at 330℃, and fully Stir for 4h, add 3.2g glass fiber, 1g carbon fiber, 0.5g SiC, 1.1g MoS in sequence 2 , 0.6g of hollow glass beads, 0.2g of coal ash, 0.2g of carbon particles and 0.3g of graphite particles, supplemented with 4.1g of PTFE, continue to stir for 2h, and finally pass the melt through the extrusion device to make the corresponding product .

[0033] The products obtained above were subjected to impact performance test according to ISO180-93, tensile performance test according to ISO527-93, and bending performance test according to ISO178-93. The test results are shown in Table 1.

Embodiment 2

[0035] Collect the waste filter material of polyphenylene sulfide and polytetrafluoroethylene→cleaning→drying→segmentation to obtain a block filter material with a rule of about 300mm. Weigh 17.6g of it and melt it at 340℃, and fully Stir for 3h, add 1.7g glass fiber, 1g carbon fiber, 0.4g SiC, 1.0g MoS in sequence 2 , 0.4g hollow glass beads, 0.2g coal ash, 0.2g carbon particles and 0.3g graphite particles, supplemented with 3.4g PTFE, continue to stir for 2h, and finally the melt is passed through the extrusion device to make the corresponding product .

[0036] The product obtained above was tested for mechanical properties according to the test method of Example 1, and compared with common PTFE products on the market. The test results are shown in Table 1.

Embodiment 3

[0038] Collect the waste filter material of polyphenylene sulfide and polytetrafluoroethylene→cleaning→drying→segmentation to obtain a block filter material with a rule of about 300mm, weigh 18.2g of it and melt it at 350℃, and fully Stir for 3h, add 1.9g glass fiber, 1.1g carbon fiber, 0.5g SiC, 1.1g MoS in sequence 2 , 0.4g hollow glass beads, 0.3g coal ash, 0.3g carbon particles and 0.2g graphite particles, supplemented with 3.7g PTFE, continue to stir for 2h, and finally the melt is passed through the extrusion device to make the corresponding product .

[0039] The product obtained above was subjected to mechanical performance test according to the test method of Example 1, and the test results are shown in Table 1.

[0040] Table 1 Test results of mechanical properties of the product of the present invention

[0041] Category

[0042] It has been tested that the product of the present invention has stable performance. Compared with normal PTFE products, the mechanical perfo...

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Abstract

The invention relates to a method of recycling polyphenylene sulfide and PTFE waste filter materials and belongs to the technical field of filter material recycling.The method includes following steps: step 1, collecting and organizing; step 2, fusing at high temperature; step 3, stirring and processing; step 4, performing extrusion molding.Polyphenylene sulfide and PTFE waste dedusting bags are treated and reprocessed to prepare products meeting design requirements so as to recycle the waste dedusting bags; the products prepared by the method have high elongation at break, good shape following performance and remarkable advantages.

Description

Technical field [0001] The invention relates to a method for recycling waste filter materials of polyphenylene sulfide and polytetrafluoroethylene, belonging to the technical field of filter material recycling. Background technique [0002] At present, environmental problems are becoming more and more serious. In the face of the increasingly severe global atmospheric pollution, the dust removal requirements of high-temperature flue gas are becoming more and more stringent. Among them, polyphenylene sulfide (PPS) and polytetrafluoroethylene (PTFE) dust bags are used for micron dust. Its filtration efficiency can reach 99.99%, so it is widely used in steel, cement, metallurgy and chemical industries. [0003] Due to the high unit prices of PPS and PTFE materials, this type of dust bag is also expensive, which limits the application of this type of dust bag to a certain extent. In order to reduce the cost of use, it is imperative to recycle the waste dust bag. However, in the develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00
CPCY02W30/62B29B17/00B29B2017/0015B29B2017/0021
Inventor 李林朝刘江峰徐辉
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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