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Recycling method for waste PPS dedusting filter bag

A filter bag, waste technology, applied in the application field of polymer materials, can solve problems such as consumption of large water resources, land resource pollution, water environment pollution, etc., and achieve good compatibility, good mechanical properties and processing properties, and rheological properties. The effect of performance improvement

Active Publication Date: 2015-04-22
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above methods all adopt the treatment methods of cleaning, drying, splitting, opening and hot melting. Although the recycling and reuse of PPS and PTFE waste dust filter bags have been realized, the biggest problem is that the recovered PPS fibers cannot be effectively recovered. use, and consume a large amount of water resources, if the cleaned wastewater is not effectively treated, it will cause water environment pollution, and the discharged sewage will also cause pollution of land resources.

Method used

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  • Recycling method for waste PPS dedusting filter bag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Remove the metal steel ring from the waste PPS dust filter bag, put it into an infrared drying machine and dry it at 150°C for 6 hours. After drying, the moisture content is less than 2%. Dust removal equipment, dust enters the collection bag, and the small pieces of non-woven fabric with a dust content of less than 3% enter the opening machine. In the opening machine, the non-woven fabric sample is opened into fibers, and the dust generated during the opening process enters the collection bag. , The fiber sample enters the shredder to be shredded into short fibers with a fiber length less than 2mm.

Embodiment 2

[0068] Add 50 kilograms of short fibers obtained in Example 1 into a 500-liter high-speed mixer, add 150 grams of antioxidant 1098, add 50 grams of zinc oxide, and add 250 grams of KH550. After mixing in a high-speed mixer for 5 minutes, discharge. Dry, with water content less than 0.2%. The dried material is melt extruded and granulated in a twin-screw extruder to obtain PPS pellets. The temperature in each zone of the twin-screw extruder is: zone 1 290°C, zone 2 290°C, zone 3 300°C, head 310°C; screw speed 120rpm, aspect ratio L / D=30 / 1.

Embodiment 3

[0070] Add 50 kilograms of short fibers obtained in Example 1 into a 500-liter high-speed mixer, add 100 grams of antioxidant 1010 and 50 grams of 168, add 50 grams of zinc oxide, and add 500 grams of KH550. After mixing in a high-speed mixer for 5 minutes, discharge. Dry, with less than 0.5% water. The dried material is melt extruded and granulated in a conical twin-screw extruder to obtain PPS pellets. Among them, the temperature of each zone of the twin-screw extruder is: 1st zone 295°C, 2nd zone 295°C, 3rd zone 305°C, head 315°C; screw speed 80rpm, length-to-diameter ratio L / D=30 / 1.

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Abstract

Belonging to the field of high polymer material application, the invention relates to a recycling method for a waste PPS dedusting filter bag. The recycling method for the waste PPS dedusting filter bag includes finishing, drying, cutting and opening, wherein the method also includes a surface modification treatment process. Further, the surface modification treatment comprises: firstly smashing dust bearing fiber obtained by opening into short fiber, then mixing the obtained short fiber with an organization modification agent, an antioxidant and an acid inhibitor uniformly, and conducting discharge, thus obtaining surface modified pellets. According to the invention, the PPS fiber that is obtained by a series of treatment and contains a small amount of micro-dust is subjected to surface modification treatment so as to make the dust in the fiber have similar surface properties to the PPS fiber and improve rheological properties. The obtained surface modified pellets have good mechanical properties and processability, so that the waste PPS dedusting filter bag can be applied effectively.

Description

technical field [0001] The invention belongs to the application field of polymer materials, and relates to a method for recycling waste PPS dust-removing filter bags. Background technique [0002] At present, industries such as chemical industry, coal-fired power plants, cement and metallurgy use a large number of dust removal filter bags to solve the problem of smoke and dust emissions. The bag is processed by filling. The main problem of this method is that it occupies a large area of ​​land. Second, because these dust filter bags are generally made of polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE), Made of organic fibers such as polyimide (P84) and polyester (PET), it is difficult to degrade in the natural environment, and will become permanent garbage after landfill, which is a potential source of pollution to land resources. [0003] CN103144221A discloses a method and system for recovering PPS in waste dust-removing bags, including a cleaning device for d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08K13/02C08K3/22C08K5/134C08K5/526C08K5/54C08K5/20C08K3/26B29C47/92B29B17/02B29C48/92
CPCB29B17/00C08K3/22C08K3/26C08K5/1345C08K5/20C08K5/526C08K5/54C08K13/02C08K2003/2296C08K2003/262C08L81/02Y02W30/62
Inventor 孙正滨杨喆
Owner CHINESE TEXTILE ACAD
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