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Difunctional metal filter material capable of removing dust and dioxin and preparation method of metal filter material

A technology for metal filter material and dioxin removal, which is applied in the direction of separation methods, metal layered products, chemical instruments and methods, etc., can solve the problem that gas pollutants such as dioxins cannot be effectively removed, and dioxins cannot be removed English, affect the filtration quality and other issues, to achieve the effect of improving the film fastness, high film fastness, and reducing side reactions

Pending Publication Date: 2021-12-14
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Metal filter materials are currently widely used in some niche high-temperature flue gas fields, but they cannot effectively remove gas pollutants such as dioxins; for example, the comparative document with publication number CN105642019A discloses a high-temperature dust removal filter material and its preparation method, the high-temperature dust removal filter material includes a metal fiber felt layer, a PTFE film layer, and a PPS fiber layer arranged in sequence, and the PTFE film layer is bonded to the metal fiber layer by glueless hot pressing technology, and the PPS fiber layer is passed through The spunlace process is entangled with the PTFE film layer; on the one hand, the film fastness of the process is too low, and the gap between the PTFE film layer and the metal fiber layer is easy to relax during use, which affects the filtration quality; on the other hand, the comparative document The disclosed filter material can only remove dust, but cannot remove gas pollutants such as dioxins

Method used

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  • Difunctional metal filter material capable of removing dust and dioxin and preparation method of metal filter material
  • Difunctional metal filter material capable of removing dust and dioxin and preparation method of metal filter material
  • Difunctional metal filter material capable of removing dust and dioxin and preparation method of metal filter material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a dust-removing and dioxin-removing bifunctional metal filter material, comprising the following steps:

[0032] (1) Preparation of MnO 2 -CoO-TiO 2 airgel powder

[0033] Add 50mL ethanol to the beaker, then add 2mL hydrochloric acid (1mol / L), add a small amount of MnO 2 and CoO powder, then add 10mL tetrabutyl titanate, mix well under ultrasonic conditions and add 5mL water to get MnO 2 -CoO-TiO 2 Alcohol gel, then adding n-butane for solvent replacement, to obtain MnO 2 -CoO-TiO 2 airgel, and then dried in a 60°C oven for 12 hours, and then ground to obtain MnO 2 -CoO-TiO 2 Airgel powder; TiO 2 Airgel is a solid material composed of ultrafine particles, which has the characteristics of small particle size, high specific surface area and low density. MnO 2 , CoO is a catalyst for removing dioxins; MnO 2 -CoO-TiO 2 Airgel can effectively improve the efficiency of de-dioxin; MnO 2-CoO-TiO 2 The activity and selectivity of airgel are m...

Embodiment 2

[0045] A method for preparing a dust-removing and dioxin-removing bifunctional metal filter material, comprising the following steps:

[0046] (1) Preparation of MnO 2 -CoO-TiO 2 airgel powder

[0047] Add 50mL ethanol to the beaker, then add 2mL hydrochloric acid (1mol / L), add a small amount of MnO 2 and CoO powder, then add 10mL tetrabutyl titanate, mix well under ultrasonic conditions and add 5mL water to get MnO 2 -CoO-TiO 2 Alcohol gel, then adding n-butane for solvent replacement, to obtain MnO 2 -CoO-TiO 2 airgel, and then dried in a 60°C oven for 12 hours, and then ground to obtain MnO 2 -CoO-TiO 2 Airgel powder; TiO 2 Airgel is a solid material composed of ultrafine particles, which has the characteristics of small particle size, high specific surface area and low density. MnO 2 , CoO is a catalyst for removing dioxins; MnO 2 -CoO-TiO 2 Airgel can effectively improve the efficiency of de-dioxin; MnO 2 -CoO-TiO 2 The activity and selectivity of airgel are ...

Embodiment 3

[0061] A method for preparing a dust-removing and dioxin-removing bifunctional metal filter material, comprising the following steps:

[0062] (1) Preparation of MnO 2 -CoO-TiO 2 airgel powder

[0063] Add 50mL ethanol to the beaker, then add 2mL hydrochloric acid (1mol / L), add a small amount of MnO 2 and CoO powder, then add 10mL tetrabutyl titanate, mix well under ultrasonic conditions and add 5mL water to get MnO 2 -CoO-TiO 2 Alcohol gel, then adding n-butane for solvent replacement, to obtain MnO 2 -CoO-TiO 2 airgel, and then dried in a 60°C oven for 12 hours, and then ground to obtain MnO 2 -CoO-TiO 2 Airgel powder; TiO 2 Airgel is a solid material composed of ultrafine particles, which has the characteristics of small particle size, high specific surface area and low density. MnO 2 , CoO is a catalyst for removing dioxins; MnO 2 -CoO-TiO 2 Airgel can effectively improve the efficiency of de-dioxin; MnO 2 -CoO-TiO 2 The activity and selectivity of airgel are ...

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Abstract

The invention provides a preparation method of a difunctional metal filter material capable of removing dust and dioxin. The preparation method comprises the following steps: S1, preparation of a functional PTFE membrane: mixing a metal catalyst-TiO2 aerogel powder, PTFE resin and an extrusion aid according to the ratio of (5-10): (15-25): (4-7), and carrying out extruding and biaxially stretching to prepare the functional PTFE membrane; S2, preparation of a metal catalyst-TiO2 / PTFE composite film-forming solution: mixing the metal catalyst-TiO2 aerogel dispersion liquid, a PTFE emulsion and water according to a ratio of (0.3-0.8): (0.5-3): (5-13), and carrying out stirring on a magnetic stirrer to prepare the metal catalyst-TiO2 / PTFE composite film-forming solution; S3, preparation of a functional metal fiber felt: putting metal fiber felt into the metal catalyst-TiO2 / PTFE composite film-forming solution prepared in the step S2 for at least one dipping operation, and then carrying out drying to prepare the functional metal fiber felt; and S4, preparation of the difunctional metal filter material. The preparation method has the beneficial effects that the metal filter material which is high in film coating fastness and has the double-effect functions of removing dust and removing dioxin can be prepared.

Description

technical field [0001] The invention relates to the technical field of environmental protection dust removal flue gas purification, in particular to a dual-functional metal filter material for dust removal and dioxin removal and a preparation method thereof. Background technique [0002] The filter material dust removal facility has the advantages of high dust removal efficiency, simple structure, and stable performance; on the basis of high dust removal efficiency and stable performance, the metal filter material has anti-oxidation, anti-sulfurization, high strength, easy cleaning, and a wide range of operating temperatures. Large (200 ~ 800 ℃) and other advantages become the current research hotspot. [0003] Metal filter materials are currently widely used in some niche high-temperature flue gas fields, but they cannot effectively remove gas pollutants such as dioxins; for example, the comparative document with publication number CN105642019A discloses a high-temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D53/86B01D53/70B32B15/02B32B15/085B32B27/32B32B27/12
CPCB01D39/14B01D53/8662B32B5/028B32B27/322B32B27/12B01D2257/2064B32B2262/103
Inventor 杨东梁燕周冠辰梁成聂孙建穆磊
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH