Filtering material and application thereof

A filter material and filter surface technology, which is applied in the direction of filtration separation, dispersed particle filtration, and dispersed particle separation, etc., can solve the problems of large pressure loss, low air permeability, and affecting the service life of filter materials, so as to achieve small pressure loss and prolong use. Excellent effect of life and dust collection efficiency

Inactive Publication Date: 2012-02-01
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the filter surface layer uses the special trilobal cross-section of polyimide fiber, the non-filter surface layer uses conventional polyphenylene sulfide fibers with a fineness of 2-4 deniers, so that the fibers in the fiber net are arranged compactly, so that Causes low air permeability and large pressure loss, which affects the service life of the filter material

Method used

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  • Filtering material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Using PPS staple fibers with a fineness of 2.0dtex (average fiber diameter of 13.8 μm) and a length of 51mm to prepare a plain weave fabric with a warp density of 38 / 2.54cm and a weft density of 15 / 2.54cm as the base fabric, on one of the faces at 198g / m 2 The weight per unit area of ​​the laminated fiber web is made of PPS staple fibers with a fineness of 1.0dtex (average fiber diameter of 9.7μm) and a length of 51mm and PPS staple fibers of 2.2dtex (average fiber diameter of 14.5μm) and a length of 51mm. Cotton blending is carried out at a weight ratio of 10:90, and after the obtained blended staple fibers are opened and carded, they are mixed at a rate of 50 strands / cm 2 The density of the puncture needles is obtained by needle punching. The fiber web is the filter layer measured on the filter surface; 2 The weight per unit area of ​​the laminated fiber web, the fiber web is made of 100wt% fineness of 2.2dtex (fiber average diameter of 19.5 μm), short fibers of PPS ...

Embodiment 2

[0043] The plain weave fabric that makes with embodiment 1 is used as base cloth, is to be made of the PPS staple fiber of fineness 1.0dtex (fiber diameter 9.7 μm), piece length 51mm and 2.2dtex (fiber mean diameter 14.5 μm), PPS short fibers with a length of 51 mm are obtained by mixing in a weight ratio of 20:80; the fiber web on the side of the non-filtering surface is made of 100wt% fineness 2.2dtex (average fiber diameter 16.2 μm), length 51mm PPS staple fiber with oval cross section is obtained by opening, carding and needle punching. All the other methods are the same as in Example 1, and the physical properties of the resulting filter material are shown in Table 1.

Embodiment 3

[0045] The plain weave fabric that makes with embodiment 1 is used as base cloth, is to be made of the PPS staple fiber of fineness 1.0dtex (fiber diameter 9.7 μm), piece length 51mm and 2.2dtex (fiber mean diameter 14.5 μm) and PPS staple fibers with a length of 51mm are mixed in a weight ratio of 30:70; the fiber web on the side of the non-filtering surface is made of 100wt% fineness of 2.2dtex (average fiber diameter is 21.2μm), It is obtained by opening, carding, and needle-punching P84 short fibers with a trefoil cross-section of 55 mm in length. All the other methods are the same as in Example 1, and the physical properties of the resulting filter material are shown in Table 1.

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Abstract

The invention discloses a filtering material and its application. The filtering material comprises a three-layer structure of a filtering surface layer, a non-filtering surface layer, and an intermediate fabric enhancement layer, wherein, the filtering surface layer is a fibrous mesh comprising 10-90 wt% of heat resistant fibers with the average diameter of below 10 mum and 10-90 wt% of heat resistant fibers with the average diameter of 10-20 mum, the non-filtering surface layer is a fibrous mesh comprising deformed section heat resistant fibers with the average diameter of 10-200 mum, and the intermediate fabric enhancement layer is a fibrous mesh comprising heat resistant fibers. The filtering material disclosed herein has good filtering performance, high mechanical strength, little loss of pressure, and long cycle time, and can improve the service life of the filtering material.

Description

technical field [0001] The invention relates to a filter material and its use. Background technique [0002] In 2007, the Bag Dust Collection Committee of China Environmental Protection Industry Association promulgated new national standards for bag filter materials and filter bags. The requirements for coal boiler flue gas emissions are becoming more and more stringent, and higher collection efficiency is required. [0003] The application environment of filter materials is characterized by four highs, one large and one low (high temperature of exhaust gas, high SO in flue gas 2 , NO X , O 2 High content; high dust concentration; low filter resistance required for renovation projects) Due to the harsh conditions of the flue gas emitted by coal-fired boilers, the life of the filter material is facing a severe test. [0004] Meta-aramid fibers with excellent heat resistance and chemical resistance, para-aramid fibers, etc. Polyamide fiber, polyphenylene sulfide fiber (her...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B5/26B01D46/02
Inventor 席群顾立霞纪舜卿
Owner TORAY IND INC
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