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Functional filter felt for eliminating harmful constituents of fume, preparation method and application method thereof

A technology of harmful components and filter felt, which is applied in the field of flue gas purification, can solve the problems of short service life, insufficient desulfurization depth, and low sulfur capacity of activated carbon, and achieve the effects of low cost, simple structure, and long service life

Active Publication Date: 2009-09-02
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its removal principle is through the adsorption of activated carbon fibers, so there are problems such as insufficient desulfurization depth, low sulfur capacity of activated carbon, short service life, and poor regeneration performance, which greatly limits its industrial application.

Method used

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  • Functional filter felt for eliminating harmful constituents of fume, preparation method and application method thereof
  • Functional filter felt for eliminating harmful constituents of fume, preparation method and application method thereof
  • Functional filter felt for eliminating harmful constituents of fume, preparation method and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0072] Such as figure 1 As shown in the cross-sectional diagram of the material, the structure of the functional filter felt from the surface to the inside is: PPS fiber layer 1, functional catalyst layer 2, PPS fiber layer 3, and 4 is the flow direction of the flue gas to be passed. Filter felts can be prepared using existing technologies such as polymer extrusion. The PPS polymer forms a loose fiber layer after melt blown spinning, and the catalyst particles are evenly sprayed on the loose fiber layer to form a catalyst layer with a certain thickness, and a loose PPS fiber layer is covered on it. , PPS fiber net is formed by rolling treatment, and then the overall structure of the filter felt is reinforced by acupuncture treatment. Both PPS fiber layer 1 and PPS fiber layer 3 have a thickness of 0.8mm and a weight of 250g / m 2 . The functional catalyst layer 2 is supported by one or more of noble metals and metal oxides on zeolites, TiO 2 , ZrO 2 、Al 2 o 3 , SiO 2 、Ge...

Embodiment 2

[0074] Such as figure 2 As shown in the cross-sectional diagram of the material, the structure of the functional filter felt from the surface to the inside is: PPS fiber composite layer 1, PPS fiber layer 3, PPS fiber composite layer 1 is composed of PPS fiber and functional catalyst 2, and 4 is to be direction of flue gas flow. The PPS polymer is heated and melted, extruded and melt-blown, and the catalyst particles are evenly sprayed onto the polymer fibers while the polymer fibers are cooled and spread to ensure that the catalyst particles are evenly dispersed and not agglomerated. . After cooling into fibers, a layer of loose PPS fiber layer is covered on it, and the PPS fiber net is formed by rolling, and then the overall structure of the filter felt is reinforced by needle punching. PPS fiber composite layer 1 has a thickness of 2.5mm and a weight of 850g / m 2 , the thickness of PPS fiber layer 3 is 1mm, and the weight is 300g / m 2 . Functional catalyst 2 is supporte...

Embodiment 3

[0077] Such as figure 2 As shown in the cross-sectional diagram of the material, the structure of the functional filter felt from the surface to the inside is: PPS fiber composite layer 1, PPS fiber layer 3. The PPS fibers used in the PPS fiber composite layer 1 and the PPS fiber layer are modified PPS fibers processed by plasma surface modification, and the preparation method of the filter felt is as in Example 2, and the functional catalyst content is calculated on the basis of the filter felt weight 0.5wt%. Other structural parameters of the filter felt and its flue gas purification method are the same as those in Example 2.

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Abstract

The invention pertains to the technical field of fume purification. The provided functional filter felt for eliminating harmful constituents of fume can realize the desulfurization or denitration of fume when removing dust; the filter felt is made from fiber materials and a functional catalyst in a compound manner; when purifying the harmful constituents of fume, the filter felt filters the dusts in the fume with nonwoven fabrics made from high temperature-resistant fiber material and carries out a catalytic reaction to eliminate nitrogen oxides (NOX) and / or sulfur oxides (SOX) through the functional catalyst contained in the filter felt. The provided filter felt is applicable to fume dedusting devices, fume desulfurization devices and fume denitration devices in power plants, metallurgical plants and chemical plants, in particular to the manufacturing of bag type fume filter. Compared with the prior art, the invention simplifies the fume purifying processes, improves processing efficiency, effectively saves the investment and reduces operational expenses, thus being suitable for the modification of the existing fume dedusting device.

Description

technical field [0001] The invention relates to the technical field of flue gas purification. The provided functional filter felt for purifying harmful components of flue gas and its application method can realize desulfurization or denitrification of flue gas, or simultaneous desulfurization and denitrification while removing dust. Background technique [0002] Industrial flue gas contains a large number of substances harmful to the environment and humans such as dust, sulfur oxides (SO X ) and nitrogen oxides (NO X ), once discharged into the atmosphere will become the main source of air pollution and photochemical pollution. As my country's environmental protection regulations become increasingly strict, controlling the discharge of dust, sulfur oxides and nitrogen oxides is of great significance to the sustainable development of my country's national economy. [0003] Among the existing patents, the Chinese published patent CN1451462A provides a method and device for p...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/94B01D39/14B01J35/00
Inventor 姜锋李鑫
Owner CHINESE TEXTILE ACAD
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