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; Hi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] (1) The waste polyphenylene sulfide and polytetrafluoroethylene blended dust removal bag is pulverized with a fiber pulverizer and pulverized into a mixture with a particle size of 20 to 200 microns;

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

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

[0021] (4) After centrifugal separation, the mixture is divided into polyphenylene sulfide materials and polytetrafluoroethylene materials. The polyphenylene sulfide materials and polytetrafluoroethylene materials separated by centrifugation shall be collected and recycled separately in time.

[0022] Through testing the density of polyphenylene sulfide material is 1.401g / ...

Example Embodiment

[0023] Example 2

[0024] (1) The waste polyphenylene sulfide and polytetrafluoroethylene blended dust removal bag is pulverized with a fiber pulverizer and pulverized into a mixture with a particle size of 20 to 200 microns;

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

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

[0027] (4) After centrifugal separation, the mixture is divided into polyphenylene sulfide materials and polytetrafluoroethylene materials. The polyphenylene sulfide materials and polytetrafluoroethylene materials separated by centrifugation shall be collected and recycled separately in time.

[0028] Through testing the density of polyphenylene sulfid...

Example Embodiment

[0029] Example 3

[0030] (1) The waste polyphenylene sulfide and polytetrafluoroethylene blended dust removal bag is pulverized with a fiber pulverizer and pulverized into a mixture with a particle size of 20 to 200 microns;

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

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

[0033] (4) After centrifugal separation, the mixture is divided into polyphenylene sulfide materials and polytetrafluoroethylene materials. The polyphenylene sulfide materials and polytetrafluoroethylene materials separated by centrifugation shall be collected and ...

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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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