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Low-resistance-drop filtering material and preparation method thereof

A filter material and resistance drop technology, applied in the fields of porous materials, high flux filter materials, and high temperature flue gas filtration, it can solve the problems of limited gas processing capacity, large filter area, and small flux, and achieve small resistance drop, high Filtration precision, high-throughput effect

Pending Publication Date: 2018-05-29
AT&M ENVIRONMENTAL ENG TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the shortcomings of the existing metal filter materials such as low flux, high resistance drop, limited gas processing capacity, and the existing high-temperature and corrosion-resistant superalloy materials, if they are used in high-temperature flue gas filtration, they need to be equipped with a large filter area and high cost. The purpose of the invention is to provide a filter material with low resistance drop, which is a metal filter with high throughput, low resistance drop, high filtration precision, high temperature resistance and sulfur corrosion resistance, which can be applied in the field of high temperature flue gas filtration. material, can replace the existing low-temperature filter material, protect the flue gas treatment equipment in the high-temperature section, and prolong the service life of the flue gas treatment equipment

Method used

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  • Low-resistance-drop filtering material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Embodiment 1 tubular filter material preparation

[0045] (1) Tubular base material rolling: the multi-layer composite FeCrAl fiber mat with a size of 157mm×1000mm×1mm (the average pore diameter is 22.50μm and the permeability is 5.43×10 -4 L / Pa.min.cm 2 ) is rolled into a tube shape along the width direction on the rolling equipment, and a seam is formed along the length direction;

[0046] (2) Tubular base material welding: the seam formed by the fiber mat rolled into a tubular shape obtained in step (1) is welded with argon arc welding to obtain a tubular base material, and the tube size is Φ50mm×1000mm (length)×1mm (pipe wall thickness);

[0047] (3) Preparation of spraying liquid: Fe-Al alloy powder prepared by -500 mesh water mist method (ingredient distribution ratio: Al content 15wt%, Cr content 4%, B content 0.04%, Zr content 0.15%, surplus is Fe) and glue are fully mixed to obtain metal powder suspension, i.e. spraying liquid; wherein, the proportion of all...

Embodiment 3

[0062] Embodiment 3 plate type filter material preparation

[0063] (1) Plate-type base material selection: a plate-type multi-layer composite FeCrAl fiber mat with a size of 500mm×500mm×0.5mm (length×width×thickness) (the average pore size detected by the PMI gas permeation method pore size analyzer is 15.02 μm, The permeability is 1.01×10 - 3 L / (Pa.min.cm 2 )) as a board-type substrate;

[0064] (2) Spraying solution preparation: fully mix -500 mesh NiCrAlFe powder (ingredient distribution ratio: Al content 4.5wt%, Cr content 16wt%, Fe content 4wt%, remainder is Ni) and glue solution fully mix, obtain metal powder suspension Liquid, that is, spraying liquid; wherein, the proportion of powder is 50%; the composition of glue liquid is acetone, epoxy resin and ethylenediamine, and the mass ratio of preparation is 14:3:3;

[0065] (3) Plate substrate spraying: combine the spray guns according to the length of the plate substrate (see figure 2 ), so that the spraying range ...

Embodiment 4

[0069] The preparation method of the filter material of this embodiment is the same as that of embodiment 1 except that the formula of the spraying liquid is different from the step (3) of embodiment 1. Present embodiment step (3) is detailed as follows:

[0070] Spraying solution preparation: Fe-Al alloy powder prepared by -500 mesh water mist method (ingredient distribution ratio: Al content 15wt%, Cr content 4%, B content 0.04%, Zr content 0.15%, the balance is Fe) and The glue is fully mixed to obtain a metal powder suspension, i.e. a spraying liquid; wherein, the proportion of the alloy powder is 75%; the glue components are acetone, epoxy resin and ethylenediamine, and the mass ratio of the above three components in the glue is 21:3:1. As the proportion of acetone increases, the viscosity of the glue decreases, and the formed metal powder suspension is unstable, and the metal powder is prone to sedimentation, resulting in uneven spray coating.

[0071] The membrane thi...

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Abstract

The invention relates to a low-resistance-drop filtering material and a preparation method thereof, and belongs to the technical field of high temperature flue gas, porous materials and high-flux filtering materials. The material is formed by compounding a metal fibrofelt base material and a metal powder film layer attached to the surface of the metal fibrofelt base material; and the metal powderfilm layer comprises the following raw materials: a Fe-Al series intermetallic compound and / or a NiCrAlFe intermetallic compound. The preparation method of the material comprises the following steps:firstly, mixing the intermetallic compound powder with a glue solution, and fully stirring to obtain metal powder suspension liquid; secondly, spraying the surface with high filtering precision of themetal fibrofelt base material with the metal powder suspension liquid to obtain a sprayed material; and finally, drying the sprayed material and then carrying out sintering treatment to obtain the low-resistance-drop filtering material finally. By the material, the problems that flux is low, resistance drop is high, high temperature resistance and sulfur attack resistance are poor, and the structural mode is single are solved, the thickness of a spraying layer and the filtering precision are controllable, and the cost is low.

Description

technical field [0001] The invention relates to a low-resistance-drop filter material and a preparation method thereof, and belongs to the technical fields of high-temperature flue gas filtration, porous materials, and high-throughput filter materials. Background technique [0002] In recent years, the continuous growth of China's industrial volume has brought unprecedented pressure to the field of environmental protection, resulting in serious environmental pollution and frequent haze weather. The country's environmental protection policies for power, coal and other energy industries have been stepped up and become increasingly stringent. Sulfur dioxide, nitrogen oxides and solid particulate matter, as the main pollutants emitted by coal-fired power plants, have become the focus of their governance. At present, the mainstream flue gas purification process of about 90% of coal-fired power plants is: boiler→coal economizer→SCR→air preheater→dust removal→desulfurization→emiss...

Claims

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Application Information

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IPC IPC(8): B01D39/20C22C38/06C22C38/28C22C38/32
CPCB01D39/2027B01D39/2041B01D2239/065B01D2239/0681C22C38/06C22C38/28C22C38/32
Inventor 顾虎王浩杨军军刘冠颖况春江匡星
Owner AT&M ENVIRONMENTAL ENG TECH CO LTD
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