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Non-woven metal fiber filter felt, preparation method thereof and filter

A metal fiber and filter felt technology, which is applied in the field of filtration, can solve the problems of poor electrical conductivity, poor wear resistance, and difficult-to-conduct fibers, and achieves high electrical conductivity, good wear resistance and tensile properties, and has wide application prospects. Effect

Active Publication Date: 2020-01-21
厦门保瑞达环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The inventors of the present application found that when adding conductive fibers for blending in the prior art, the limitation of the non-woven felt preparation process makes it difficult to add a large amount of conductive fibers for blending, and the conductivity is poor.
And by adding conductive fibers for blending, the wear resistance of the product is poor and the service life is short

Method used

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  • Non-woven metal fiber filter felt, preparation method thereof and filter
  • Non-woven metal fiber filter felt, preparation method thereof and filter
  • Non-woven metal fiber filter felt, preparation method thereof and filter

Examples

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preparation example Construction

[0030] The preparation method of a kind of non-woven metal fiber filter felt provided by the embodiment of the present invention comprises the following steps:

[0031] S1, performing an opening treatment on the stainless steel fibers to obtain fluffy stainless steel fibers.

[0032] In a preferred embodiment, the stainless steel fibers are 316L stainless steel fibers with a length of 34-42 mm and a diameter of 6-12 μm. Stainless steel fibers have good electrical conductivity, friction resistance, high temperature resistance, corrosion resistance, and good filtration performance. The length of the stainless steel fiber is 34-42mm, and the diameter is 6-12μm. The length of the stainless steel fiber under this condition is moderate, the breaking strength of a single fiber is greater than 16CN, the elongation at break is greater than 1.4%, and the fiber bundle dispersion performance is better.

[0033] Further, in this step, the line speed of opening is 1-2 m / min. At this speed...

Embodiment 1

[0069] A kind of non-woven metal fiber filter mat provided in this embodiment is prepared according to the following steps:

[0070] (1) Opening the stainless steel fibers to obtain fluffy stainless steel fibers. The line speed of opening is 1.5m / min.

[0071] (2) Feed the carding machine through the opened stainless steel fiber to obtain a stainless steel fiber fleece, the frequency of the carding machine is 450rpm / min, and the line speed is 1.2m / min.

[0072] (3) Put the stainless steel fiber fleece in an oxalic acid solution with a mass fraction of 8%, take it out after heating and boiling for 20 minutes, wash and dry.

[0073] (4) spray the mixed solution of cupric chloride and nickel chloride on the product that step (3) obtains, then logical H under the condition of 420 ℃ 2 Treat for 1 hour, and then anneal at 220°C for 20 minutes to obtain a modified stainless steel fiber fleece.

[0074] (5) Place the non-woven felt (polyester non-woven felt) in a low-temperature pl...

Embodiment 2

[0082] The non-woven metal fiber filter felt provided in this example differs from Example 1 in that in step (10), the non-woven metal felt is hot-rolled at 280°C and 0.4MPa for 5s, and then heated at 220 ℃, 0.7MPa conditions of hot rolling for 15s.

[0083] The filter precision of the prepared sample reaches 2 μm.

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Abstract

The invention provides a non-woven metal fiber filter felt, a preparation method thereof and a filter, and relates to the technical field of filtration. The preparation method of the filter felt comprises the following steps: opening stainless steel fibers, and feeding the stainless steel fibers into a carding machine to prepare a stainless steel fiber web; carrying acid treatment on the stainlesssteel fiber web, spray-coating a mixed metal solution, and carrying out H2 heat treatment and annealing treatment on the modified stainless steel fiber web; modifying the non-woven felt with the LDHslayer by phytic acid, chitosan and Cu ions to obtain the modified non-woven felt; then overlaying one or more layers of modified stainless steel fiber webs on the modified non-woven felt to obtain afelt web; piercing stainless steel fibers into the non-woven felt through a single-face needling process to prepare the non-woven metal felt; carrying out high-temperature hot rolling to obtain the non-woven metal fiber filter felt. According to the invention, the modified non-woven felt is used as a substrate, stainless steel metal fibers are compounded on the non-woven felt through a needling process, so that the surface of the obtained filter felt has good conductivity and wear resistance and has good flexibility.

Description

technical field [0001] The invention relates to the technical field of filtration, and in particular to a non-woven metal fiber filter felt, a preparation method thereof and a filter. Background technique [0002] At present, in the field of industrial gas-solid separation and gas-liquid separation, the main filter material is polymer fiber, such as non-woven filter felt made of PET, PP and other materials. Non-woven filter felt has excellent filtering effect for various waste gases and waste water. However, when it is used in industries such as flour dust, chemical dust, coal dust, etc., which may explode in the presence of static electricity. In the existing non-woven filter material, a certain antistatic effect is achieved by adding a large amount of conductive fibers to the non-woven filter material for blending. [0003] The inventors of the present application have found that when conductive fibers are added for blending in the prior art, the limitation of the non-wo...

Claims

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Application Information

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IPC IPC(8): B01D39/20B01D46/00B01D46/24D04H1/46D04H1/498D04H1/4234D06M10/06D06M10/08D06M13/292D06M15/03D06M11/13D06M101/32D06M101/20
CPCB01D39/2027B01D46/00B01D46/2411B01D2239/0618B01D2239/10D04H1/4234D04H1/46D04H1/498D06M10/06D06M10/08D06M11/13D06M13/292D06M15/03D06M2101/20D06M2101/32
Inventor 高芳芳黄清保
Owner 厦门保瑞达环保科技有限公司