Method for separating waste polyphenylene sulfide from polytetrafluoroethylene blended dust removal bag

A polytetrafluoroethylene and polyphenylene sulfide technology is applied in the field of separation of waste polyphenylene sulfide and polytetrafluoroethylene blended dust bags, which can solve the problems of high unit price, lack of separation technology, restriction of recycling and utilization of dust bags, etc. Achieve the effect of no secondary pollution and simple operation process

Inactive Publication Date: 2016-03-16
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 production costs, waste PPS and PTFE blended dust bags can be recycled and reused. However, PPS has excellent thermal stability, while PTFE

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Follow the steps below to separate polyphenylene sulfide and polytetrafluoroethylene in the blended dust bag,

[0032] Step 1, preprocessing:

[0033] (1) Collect, collect and organize the waste dust bags;

[0034] (2) Cleaning. Clean the collected waste dust bag. The purpose of this step is to use deionized water to remove the dust attached to the dust bag. In order to clean more fully, ultrasonic cleaning can be used. The ultrasonic power is 2kW and the frequency is 28kHz. ;

[0035] (3) Drying, drying the cleaned dust bag until the water content is less than 5%;

[0036] (4) Segmentation. Divide the dried dust removal bag into strips or blocks of 200㎜~400㎜. The purpose of this step is to make the dust removal bag easier to open;

[0037] (5) Opening, using an opening machine to open the strip or block dust bag;

[0038] Step 2, freezing and crushing: Cool the pretreated waste dust bag to -103°C until the polyphenylene sulfide is completely brittle, mechanically h...

Embodiment 2

[0042] Follow the steps below to separate polyphenylene sulfide and polytetrafluoroethylene in the blended dust bag,

[0043] Step 1, preprocessing:

[0044] (1) Collect, collect and organize the waste dust bags;

[0045] (2) Cleaning. Clean the collected waste dust bag. The purpose of this step is to use deionized water to remove the dust attached to the dust bag. In order to clean more fully, ultrasonic cleaning can be used. The ultrasonic power is 2.5kW and the frequency is 25kHz;

[0046] (3) Drying, drying the cleaned dust bag until the water content is less than 5%;

[0047] (4) Segmentation. Divide the dried dust removal bag into strips or blocks of 200㎜~400㎜. The purpose of this step is to make the dust removal bag easier to open;

[0048] (5) Opening, using an opening machine to open the strip or block dust bag;

[0049] Step 2, freezing and crushing: Cool the pretreated waste dust bag to -144°C until the polyphenylene sulfide is completely embrittled, mechanicall...

Embodiment 3

[0053] Follow the steps below to separate polyphenylene sulfide and polytetrafluoroethylene in the blended dust bag,

[0054] Step 1, preprocessing:

[0055] (1) Collect, collect and organize the waste dust bags;

[0056] (2) Cleaning. Clean the collected waste dust bag. The purpose of this step is to use deionized water to remove the dust attached to the dust bag. In order to clean more fully, ultrasonic cleaning can be used. The ultrasonic power is 3kW and the frequency is 21kHz. ;

[0057] (3) Drying, drying the cleaned dust bag until the water content is less than 5%;

[0058] (4) Segmentation. Divide the dried dust removal bag into strips or blocks of 200㎜~400㎜. The purpose of this step is to make the dust removal bag easier to open;

[0059] (5) Opening, using an opening machine to open the strip or block dust bag;

[0060] Step 2, freezing and crushing: Cool the pretreated waste dust bag to -197°C until the polyphenylene sulfide is completely brittle, mechanically hit...

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PUM

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Abstract

The invention relates to a method for separating waste polyphenylene sulfide from a polytetrafluoroethylene blended dust removal bag, and belongs to the technical field of industrial dust removal. The method comprises the following steps: step, pre-processing; step II, freezing and crushing; and step III, screening and separating. According to the technical scheme, by utilizing difference between brittleness of the frozen polyphenylene sulfide fibers and brittleness of frozen polytetrafluoroethylene fibers, the polyphenylene sulfide fibers are embrittled into powder within a temperature interval of (-)100 DEG C to (-)200 DEG C while the polytetrafluoroethylene fibers are not changed, so that the polyphenylene sulfide fibers and the polytetrafluoroethylene fibers are effectively separated by virtue of mechanical screening means. The method has the beneficial effects that the operation process is simple, the separation process is free from secondary pollution, and industrial popularization and application can be realized.

Description

technical field [0001] The invention relates to a method for separating waste polyphenylene sulfide and polytetrafluoroethylene blended dust removal bags, belonging to the technical field of industrial dust removal. Background technique [0002] At present, environmental problems are becoming more and more serious. Facing the increasingly severe global air pollution, the dust removal requirements for high-temperature flue gas are becoming more and more stringent. The 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 materials and PTFE materials, this type of dust removal bag is also expensive, which limits the application of this type of dust removal bag to a certain extent. In order to reduce production costs, waste PPS and PTFE blended dust bags can be recycled and reused. However, PPS has excellent thermal stability, while PTFE is commonly known as the "king of pl...

Claims

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Application Information

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IPC IPC(8): B29B17/00
CPCY02W30/62B29B17/00B29B2017/001
Inventor 王光应刘江峰徐辉
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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