Preparation method of dual-purpose filter material for dedusting and decomposing dioxins

A filter material and dioxin technology, which is applied in the field of preparation of dual-effect filter materials for dust removal and dioxin decomposition, can solve the problems of reducing the service life of filter materials, large air permeability resistance of filter materials, and low overall strength of filter materials, etc. Increases chance of collision, improves retention, prevents breakage and wear

Inactive Publication Date: 2009-08-05
ZHEJIANG SCI-TECH UNIV
View PDF6 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above patents relate to polytetrafluoroethylene fibers (200610154943.5, 200810060356.9, 200610155052.1, 200810124334.4) with added catalysts, but the strength of the fibers is greatly reduced due to the addition of powder, and the fibers are easily broken during the acupuncture process, resulting in certain losses. At the same time, it also causes the overall strength of the needle-punched filter material to be low, which reduces the service life of the filter material; the above patents involve polytetrafluoroethylene films (200710069975.X, 200810124335.9) with added catalysts. The amount is small, and in order to improve the efficiency of dioxin decomposition, multi-layer lamination is required, which eventually results in a large air resistance of the needle-punched filter material, which is not conducive to industrial applications

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of dual-purpose filter material for dedusting and decomposing dioxins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] a. Preparation of dust-facing layer: PTFE fiber is pretreated with surfactant OP-10, with a weight ratio of 1:300 to the fiber, sprayed onto the surface of the fiber, sealed for 72 hours, and then processed into a dust-resistant layer after opening and carding. Dust layer, with a total grammage of 50 g / m2;

[0033] b. Preparation of buffer layer: PTFE fibers with a fineness of 9 microns, pretreated with surfactant OP-10, with a weight ratio of 1:300 to the fibers, sprayed on the surface of the fibers, sealed for 72 hours, and then opened Loose, carded and processed into a buffer layer, with a total grammage of 200 grams per square meter;

[0034]c. Preparation of catalytic layer: The weight ratio of polytetrafluoroethylene resin powder to catalyst powder is 1:0.4, mix evenly, and then add liquid paraffin, the weight ratio of polytetrafluoroethylene resin powder to liquid paraffin is 1:0.2, Mix evenly, let stand at 30°C for 120 hours, then stand at 70°C for 12 hours to ...

Embodiment 2

[0038] a. Preparation of dust-facing layer: PTFE fibers are pretreated with surfactant OP-10, with a weight ratio of 1:800 to fibers, sprayed onto the fiber surface, sealed for 24 hours, and then processed into a dust-resistant layer after opening and carding. Dust layer, with a total grammage of 200 g / m2;

[0039] b. Preparation of buffer layer: PTFE fibers with a fineness of 12 microns, pretreated with surfactant OP-10, with a weight ratio of 1:800 to the fibers, sprayed on the surface of the fibers, sealed for 24 hours, and then opened Loose, carded and processed into a buffer layer, with a total grammage of 50 grams per square meter;

[0040] c. Preparation of catalytic layer: The weight ratio of polytetrafluoroethylene resin powder and catalyst powder is 1:1, mix evenly, and then add liquid paraffin, the weight ratio of polytetrafluoroethylene resin powder to liquid paraffin is 1:0.2, Mix evenly, let stand at 30°C for 120 hours, then stand at 70°C for 12 hours to fully m...

Embodiment 3

[0044] a. Preparation of dust-facing layer: PTFE fibers are pretreated with surfactant OP-10, with a weight ratio of 1:500 to the fibers, sprayed on the surface of the fibers, sealed for 45 hours, and then processed into a dust-resistant layer after opening and carding. Dust layer, with a total grammage of 100 g / m2;

[0045] b. Preparation of buffer layer: PTFE fibers with a fineness of 10 microns, pretreated with surfactant OP-10, with a weight ratio of 1:500 to the fibers, sprayed on the surface of the fibers, sealed for 45 hours, and then opened Loose, carded and processed into a buffer layer, with a total grammage of 100 grams per square meter;

[0046] c. Preparation of catalytic layer: The weight ratio of polytetrafluoroethylene resin powder to catalyst powder is 1:0.7, mix evenly, and then add liquid paraffin, the weight ratio of polytetrafluoroethylene resin powder to liquid paraffin is 1:0.2, Mix evenly, let stand at 30°C for 120 hours, then stand at 70°C for 12 hour...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Basis weightaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method for double action filtering material capable of dedusting and decomposing dioxin. The material comprises the following five-layer structure: a first layer is a dust receiving layer formed by polytetrafluoroethylene fibers through carding process; a second layer is a buffer layer formed by fine denier polytetrafluoroethylene fiber through preneedling processing; a polytetrafluoroethylene film carrying a catalyst is processed into reticular structure fibers by a film splitting method, and a plurality of films are laminated to form a catalysis layer which is a third layer; a fourth layer is a Teflon base cloth reinforced layer; and the four layers are laminated, then the dust receiving layer is laminated on the base cloth reinforced layer, and finally the material is formed through needling processing. The material can be widely applied to the dedusting and dioxin decomposition of high temperature off gas. Compared with the prior art, the preparation method has the advantages of simple and feasible process, low processing cost, and lower requirements on the equipment; and simultaneously the preparation method removes the defects of great fiber loss and a great drag force for the filtering material.

Description

technical field [0001] The invention relates to the technical field of filter materials, in particular to a preparation method of a double-effect filter material for dust removal and dioxin decomposition. Background technique [0002] With the rapid development of modern industrialization in various countries in the world, air pollution has become an increasingly serious global problem. The emission and control of waste gases such as dioxins, furans, nitrogen oxides, and sulfides have attracted the attention of countries all over the world. Municipal solid waste incineration has become one of the most important and effective technologies for waste disposal in various countries. Waste incineration treatment can not only turn waste into treasure, but also regenerate energy resources through gas-electric co-generation, and reduce the volume of waste by about 90%. However, the incineration process will inevitably produce a large amount of pollutants, such as particulate matter,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16B01D53/86B01D53/70B01J32/00B32B5/26
Inventor 郭玉海陈建勇张华鹏赵小泷金王勇王芳李琴红夏前军赵娣童亮亮
Owner ZHEJIANG SCI-TECH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap