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Preparation method of high-precision metal fibrofelt for high-temperature gas dust removal

A metal fiber felt, high temperature gas technology, applied in the field of non-woven fabrics, can solve the problems of fiber mechanical properties, anti-folding performance, poor bonding force of the felt layer, difficult to form, etc., to achieve good mechanical properties and anti-folding properties, Not easy to break, reliable fastness effect

Active Publication Date: 2020-02-14
西安菲尔特金属过滤材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The metal fiber mat prepared by the traditional sintering process is prone to grain coarsening and "bamboo-like" morphology, which significantly reduces the mechanical properties and folding resistance of the fiber; the sintering temperature and The holding time is different, so it is difficult to form a welding point of a certain size between the fibers, resulting in poor bonding of the felt layer

Method used

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  • Preparation method of high-precision metal fibrofelt for high-temperature gas dust removal
  • Preparation method of high-precision metal fibrofelt for high-temperature gas dust removal
  • Preparation method of high-precision metal fibrofelt for high-temperature gas dust removal

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Effect test

Embodiment 1

[0037] The preparation method of the high-precision metal fiber felt for high-temperature gas dust removal of the present invention is specifically implemented according to the following steps:

[0038] Step 1. Use the felting equipment to lay the crude fiber into the crude fiber felt blank, then check the uniformity of the crude fiber felt blank on the light inspection table, and take out the uniform crude fiber felt blank for use;

[0039] Among them, the diameter of the crude fiber is 22 μm, and the unit weight is 600 g / m 2 .

[0040] Step 2, using a high-temperature vacuum furnace to perform vacuum high-temperature sintering treatment on the crude fiber felt blank, and after cooling down, the crude fiber sintered felt is obtained for use;

[0041] Among them, the temperature of vacuum high-temperature sintering treatment is 1100℃, the holding time is 120min, and the vacuum degree is 7.0×10 - 2 Pa, the gas quenching temperature is 750 ℃, and the high temperature vacuum f...

Embodiment 2

[0049] The preparation method of the high-precision metal fiber felt for high-temperature gas dust removal of the present invention is specifically implemented according to the following steps:

[0050] Step 1. Use the felting equipment to lay the crude fiber into the crude fiber felt blank, then check the uniformity of the crude fiber felt blank on the light inspection table, and take out the uniform crude fiber felt blank for use;

[0051] Among them, the wire diameter of the crude fiber is 30 μm, and the unit weight is 1200 g / m 2 .

[0052] Step 2, using a high-temperature vacuum furnace to perform vacuum high-temperature sintering treatment on the crude fiber felt blank, and after cooling down, the crude fiber sintered felt is obtained for use;

[0053] Among them, the temperature of vacuum high temperature sintering treatment is 1200℃, the holding time is 150min, and the vacuum degree is 7.0×10 - 2 Pa, the gas quenching temperature is 800 ℃, and the high temperature va...

Embodiment 3

[0061] The preparation method of the high-precision metal fiber felt for high-temperature gas dust removal of the present invention is specifically implemented according to the following steps:

[0062] Step 1. Use the felting equipment to lay the crude fiber into the crude fiber felt blank, then check the uniformity of the crude fiber felt blank on the light inspection table, and take out the uniform crude fiber felt blank for use;

[0063] Among them, the diameter of the crude fiber is 35 μm, and the unit weight is 1500 g / m 2 .

[0064] Step 2, using a high-temperature vacuum furnace to perform vacuum high-temperature sintering treatment on the crude fiber felt blank, and after cooling down, the crude fiber sintered felt is obtained for use;

[0065] Among them, the temperature of vacuum high-temperature sintering treatment is 1300℃, the holding time is 180min, and the vacuum degree is 7.0×10 - 2 Pa, the gas quenching temperature is 700 ℃, and the high temperature vacuum ...

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Abstract

The invention discloses a preparation method of a high-precision metal fibrofelt for high-temperature gas dust removal. The preparation method comprises the following steps: firstly, paving crude fibers into a crude fibrofelt blank by adopting felt paving equipment; performing vacuum high-temperature sintering treatment on the crude fibrofelt blank by adopting a high-temperature vacuum furnace, and cooling to obtain a crude fiber sintered felt; paving superfine fibers into a superfine fibrofelt blank by adopting the felt paving equipment, and then flattening the superfine fibrofelt blank by adopting a flattening machine so as to obtain a flat superfine fibrofelt blank; stacking the flat superfine fibrofelt blank and the crude fiber sintered felt, covering the surface of an obtained felt with a non-metal high-temperature-resistant material, then feeding an obtained felt blank into a high-temperature vacuum furnace for vacuum high-temperature sintering treatment, taking out the felt blank after cooling, and flattening the felt blank to obtain the high-precision metal fibrofelt. The high-precision metal fibrofelt prepared by the method is good in mechanical property, folding resistance and binding force of felt layers.

Description

technical field [0001] The invention relates to the technical field of non-woven fabrics, in particular to a preparation method of a high-precision metal fiber felt for high-temperature gas dust removal. Background technique [0002] The unique high temperature resistance of metal fiber felt is applied to the purification of high temperature dusty gas, and the remaining heat can be recovered, saving energy, and at the same time, there is no secondary pollution. Therefore, it is widely used in high temperature fields such as coal-fired boiler flue gas dust removal, precious metal recovery, and metallurgical industry dust removal. [0003] The filter material for high-temperature gas dust removal uses ultra-fine fibers as the windward side of the metal fiber felt filter material, combined with fibers with a relatively thick wire diameter as the support layer, which can form a structure from small to large with gradient pore size in the thickness direction of the filter materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20
CPCB01D39/2044
Inventor 康彦侯力强张小庆卢文静王磊李明路晓锋李凯凯彭海军阳清郭亮呼伟
Owner 西安菲尔特金属过滤材料股份有限公司
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