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High-temperature fluorine-fibre filtering materials for dust-collecting face and its preparation

A technology of high-temperature filter material and manufacturing method, which is applied in the research and development of filter material, the manufacture of the filter material, and the field of filter material for flue gas treatment. It can solve the problems of poor textile performance of polytetrafluoroethylene fiber, difficult process and high equipment requirements. Problems, to achieve the effect of feasible process, improve water repellency, and ensure filtration performance

Inactive Publication Date: 2007-01-17
NANJING JIHUA 3521 SPECIAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor textile performance of PTFE fibers, the process is difficult and requires high equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment is made through the following steps as a fluorine fiber high-temperature filter material on the dust-facing surface

[0025] 1) Preparation of base fabric - spinning and weaving PPS fiber into base fabric (or a blended or blended structure of PPS and PTFE filament, or pure PTFE filament base fabric);

[0026] 2) Preparation of surface layer——opening, carding, agglomeration, and laying of PPS fibers to make a fiber surface layer;

[0027] 3) Needle-punched felting—stacking in the form of fiber surface layer + base fabric + fiber surface layer, and forming a basic felt with required strength and density through a needle punching machine;

[0028] 4'), prepare the covering layer fiber - spray the polytetrafluoroethylene fiber with an antistatic agent solution, which can eliminate static electricity, which is beneficial to improve the cohesion of the fiber web in the subsequent process, and reduce the breaking of the web when laying the web;

[0029] ...

Embodiment 2

[0042] The fluorine fiber high-temperature filter material used as the dust-facing surface in this embodiment is basically the same as that in Embodiment 1, except that the base fabric is made of polytetrafluoroethylene fiber filament base cloth or a blended base cloth of glass fiber and polytetrafluoroethylene fiber filament , the surface material of the basic felt is a blended product of at least one of polytetrafluoroethylene fiber and glass fiber, PPS fiber, and P84 fiber, and finally undergoes high-temperature setting, and other steps are the same.

[0043] Comparative experiments show that its performance index is close to that of pure PTFE products, and different fibers added in it will have different effects on the product. For example, adding P84 fiber can improve the filtration performance and temperature resistance of the filter material, and adding PPS can improve corrosion resistance and anti-corrosion. Wind speed, wear-resistant performance.

Embodiment 3

[0045] In this embodiment, the fluorine fiber high-temperature filter material used as the dust-facing surface is basically the same as that in Embodiment 1. The difference is that the fibers of the base cloth are made of glass fibers, and the post-processing steps, namely 7), 8), 9), and 10) are necessary steps. Comparative experiments show that its various performance indicators are close to pure PTFE products.

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Abstract

A refractory filtering fluorine fiber material used for the incident surface is composed of a basic felt consisting of cloth substrate and fibrous surface layer, a covering layer made of teflon fibers, and a smooth surface layer. Its preparing process includes such steps as providing cloth substrate, preparing fibrous surface layer, needling to become felt, preparing covering layer, needling, and hot rolling for fixating shape.

Description

technical field [0001] The invention relates to a filter material, especially a filter material used for flue gas treatment, and the invention also relates to a manufacturing method of the filter material, which belongs to the research and development of the filter material [0002] technology field. Background technique [0003] At present, the filter materials used for flue gas treatment of coal-fired boilers and waste incinerators are mainly polyphenylene sulfide (PPS) needle felt, polytetrafluoroethylene (PTFE) fiber needle felt, and glass fiber coated filter material. Among them, polyphenylene sulfide (PPS) needle-punched felt is limited by material properties, and its operating temperature cannot exceed 190°C, and its oxidation resistance is not good, so it cannot be filtered in a high-oxygen environment. In addition, polyphenylene sulfide (PPS) itself is not It has water repellency, and it is easy to cause sticky bags under low temperature operation or high humidity;...

Claims

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Application Information

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IPC IPC(8): B01D39/16
Inventor 夏前军于淼涵
Owner NANJING JIHUA 3521 SPECIAL EQUIP
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