Method for preparing high-temperature fume dust-collection oxidation-resistant metal fiber sintered felt filtering material

The technology of metal fiber felt and metal fiber is applied in the field of preparation of oxidation-resistant metal fiber sintered felt filter material for high-temperature flue gas dust removal, which can solve the problem of reducing the mechanical properties and oxidation resistance of metal fiber sintered felt, and the easy coarse grain of metal fiber. sintering, long holding time, etc., to achieve the effect of eliminating defects, shortening sintering time, and improving filtration accuracy

Inactive Publication Date: 2017-09-19
ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the high sintering temperature and long holding time of the traditional process, the internal grains of the metal fiber are easy to coarsen, which significantly reduces the mechanical properties and oxidation resistance of the metal fiber sintered felt, so it is necessary to improve the existing technology

Method used

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Embodiment Construction

[0017] A method for preparing an oxidation-resistant metal fiber sintered felt filter material for high-temperature flue gas dedusting, characterized in that it comprises the following steps:

[0018] (1) Shorten metal fibers into short fibers of 1-10cm, and then use metal fiber felting machine to process short fibers with different wire diameters into metal fiber felts;

[0019] (2) The metal fiber felt is superimposed in one or more layers to make a multi-layer composite fiber felt;

[0020] (3) Place the above-mentioned multi-layer composite fiber mat in a microwave sintering furnace, in a mixed atmosphere, heat up to 1000 °C at a rate of 45 °C / min, then keep it warm for 30 min for sintering treatment, and obtain a metal fiber sintered mat after natural cooling;

[0021] (4) Use a rolling mill to adjust the thickness of the metal fiber sintered felt to 0.1-1.2cm, soak it in a hydrochloric acid solution with a mass fraction of 20% for pickling for 2 minutes, remove it, then ...

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Abstract

The invention discloses a method for preparing a high-temperature fume dust-collection oxidation-resistant metal fiber sintered felt filtering material. According to the method, a microwave sintering process is adopted, the sintering time is shortened, the heating velocity of a metal fiber sintered felt in the sintering process is effectively increased, and the sintering temperature can be also reduced, so that excessive growth of fiber crystal granules is prevented, the breaking strength of a single fiber is improved, and furthermore the breaking strength of an overall fiber sintered material is improved; and an electroplating method is further adopted to electroplate an amorphous-state plated Ni-P alloy layer on the surface of the metal fiber sintered felt, so that the surface quality of metal fiber felt is improved, defects of the micro-fine fiber surface of the metal fiber feltare eliminated, the oxidation resistance of the fiber felt is improved, and in addition, due to deposition of a Ni-P alloy, the aperture of the fiber felt is smaller and smaller, the air permeability of the fiber felt is degraded gradually, the bubbling pressure is gradually increased, the filtration precision is improved, and industrial use requirements can be completely met.

Description

technical field [0001] The invention relates to the technical field of high-temperature dust removal filter material, in particular to a preparation method of an oxidation-resistant metal fiber sintered felt filter material for high-temperature flue gas dust removal. Background technique [0002] High-temperature dust removal technology uses high-temperature filter media to directly remove dust and purify gas under high-temperature conditions. The main technical features include: (1) high dust removal temperature, high-temperature gas can reach 600-1000 ° C, (2) high dust removal and purification standards , the outlet smoke concentration is required to be lower than 20mg / NM 3 , (3) "high efficiency and low resistance", good economic performance; (4) good cleaning effect, can realize online backflushing, long service life; (5) strong corrosion resistance, excellent resistance to high temperature gas corrosion, chemical Stable performance. This technology can maximize the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20
CPCB01D39/2044B01D39/2041
Inventor 钟华梁明张兵
Owner ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
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