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Separation method of waste polyphenylene sulfide and polytetrafluoroethylene blended dust settling pockets

A technology of polytetrafluoroethylene and polyphenylene sulfide, which is applied in the field of separation, can solve the problems of high price of dust removal bags, inability to recycle and affect the purity of materials, etc., and achieve the effects of improving cleaning effect, reducing compactness and low price.

Active Publication Date: 2016-05-04
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the unit price of PTFE material and PPS material is relatively high, resulting in the high price of the dust bag
In order to reduce production costs, it is imperative to recycle waste dust bags. However, 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; High oil pollution not only makes the combination between polyphenylene sulfide and polytetrafluoroethylene more tightly, further increases the difficulty of separation, and if the oil pollution is not removed in the recovery, it will also affect the purity of the separated material; therefore, Only waste polyphenylene sulfide and PTFE blended dust bags can be stored and cannot be recycled

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Grinding the waste polyphenylene sulfide and polytetrafluoroethylene blended dust bag with a fiber grinder, and crushing it into a mixture with a particle size of 20-200 microns;

[0019] (2) Mix 8Kg dimethylformamide, 2Kg acetone, 30Kg sodium chloride, 9Kg ionic surfactant, and 25Kg water to make a separation liquid. The ionic surfactant is carboxylate, and the density of the separation liquid is 1.65g / m 3 ;

[0020] (3) Weigh 10Kg of the mixture and 30Kg of the separation liquid and stir for 1 hour, then pour it into a centrifuge for centrifugation for 2 hours;

[0021] (4) The mixed material is separated into polyphenylene sulfide material and polytetrafluoroethylene material after centrifugal separation, and the centrifugally separated polyphenylene sulfide material and polytetrafluoroethylene material need to be collected and recycled separately in time.

[0022] By detecting the density of polyphenylene sulfide material is 1.401g / m 3 , the purity of polyphe...

Embodiment 2

[0024] (1) Grinding the waste polyphenylene sulfide and polytetrafluoroethylene blended dust bag with a fiber grinder, and crushing it into a mixture with a particle size of 20-200 microns;

[0025] (2) Mix 10Kg dimethylformamide, 2.8Kg acetone, 35Kg sodium chloride, 11Kg ionic surfactant, and 20Kg water to make a separation liquid. The ionic surfactant is higher alcohol sulfate ester salt, and separate The density of the liquid is 1.75g / m 3 ;

[0026] (3) Weigh 10Kg of the mixture and 33Kg of the separation liquid and stir for 1 hour, then pour it into a centrifuge for centrifugation for 2 hours;

[0027] (4) The mixed material is separated into polyphenylene sulfide material and polytetrafluoroethylene material after centrifugal separation, and the centrifugally separated polyphenylene sulfide material and polytetrafluoroethylene material need to be collected and recycled separately in time.

[0028] By detecting the density of polyphenylene sulfide material is 1.395g / m 3...

Embodiment 3

[0030] (1) Grinding the waste polyphenylene sulfide and polytetrafluoroethylene blended dust bag with a fiber grinder, and crushing it into a mixture with a particle size of 20-200 microns;

[0031] (2) Mix 12Kg dimethylformamide, 3.3Kg acetone, 47Kg sodium chloride, 13Kg ionic surfactant, and 15Kg water to make a separation liquid. The ionic surfactant is carboxylate and higher alcohol sulfuric acid The ester salt is compounded according to the ratio of 1:1, and the density of the separation liquid is 2.01g / m 3 ;

[0032] (3) Weigh 10Kg of the mixture and 36Kg of the separation liquid and stir for 1.5 hours, then pour it into a centrifuge for centrifugation for 2.5 hours;

[0033] (4) The mixed material is separated into polyphenylene sulfide material and polytetrafluoroethylene material after centrifugal separation, and the centrifugally separated polyphenylene sulfide material and polytetrafluoroethylene material need to be collected and recycled separately in time.

[00...

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Abstract

The invention relates to a separation method of waste polyphenylene sulfide and polytetrafluoroethylene blended dust settling pockets. The separation method comprises the steps that the waste polyphenylene sulfide and polytetrafluoroethylene blended dust settling pockets are firstly smashed, then the smashed mixed materials are added into a separating medium with the density between the density of polyphenylene sulfide and the density of polytetrafluoroethylene for centrifugal separation, blended fabric is smashed according to the different densities of two fibers, and the aim of recycling polyphenylene sulfide and polytetrafluoroethylene in the waste dust settling pockets is achieved through centrifugal separation. The purity of polyphenylene sulfide materials obtained after separation reaches 97% or above, the purity of polytetrafluoroethylene materials reaches 91% or above, the material separation purity is high, the separation effect is good, and the recycling value is high.

Description

technical field [0001] The invention relates to a separation method, in particular to a separation method for waste polyphenylene sulfide and polytetrafluoroethylene blended dust removal bags. Background technique [0002] PPS (polyphenylene sulfide) and PTFE (polytetrafluoroethylene) dust bags are favored by many industrial manufacturers because of their ability to filter micron-sized dust up to 99.99%, and they are widely used in steel, cement, metallurgy and Chemical and other industries. At the same time, the unit prices of PTFE materials and PPS materials are relatively high, which makes the dust bag expensive. In order to reduce production costs, it is imperative to recycle waste dust bags. However, 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; High oil pollution not only makes the combination between polyphenylene sulfide and polytetrafluoroethyle...

Claims

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Application Information

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IPC IPC(8): B29B17/02B29B17/04
CPCB29B17/02B29B17/04B29B2017/0203B29B2017/0231Y02W30/62
Inventor 王光应刘江峰徐辉
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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