Piezoelectric and/or thermoelectric reinforced electrofiltration long-term double-effect filter material and manufacturing method thereof

A manufacturing method and filter material technology, which are applied in chemical instruments and methods, separation methods, filtration and separation, etc., can solve the problems of low efficiency, high escape rate, and single capture mechanism of fine particles, so as to increase the capture efficiency and reduce the Escape rate, overcoming the effect of easy decay

Active Publication Date: 2020-11-17
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the major problems of the current bag filter material for fine particles, such as single capture mechanism, low efficiency, and high escape rate, the present invention provides a piezoelectric and / or thermoelectric-enhanced long-term double-effect filter material for electric filtration and a manufacturing method. The pressure difference of the material during filtration and / or the heat of the flue gas cause the material to generate static electricity, and the electrostatic-filtration dual-effect mechanism is used to capture particulate matter, which greatly improves the efficiency of the filter material

Method used

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  • Piezoelectric and/or thermoelectric reinforced electrofiltration long-term double-effect filter material and manufacturing method thereof
  • Piezoelectric and/or thermoelectric reinforced electrofiltration long-term double-effect filter material and manufacturing method thereof
  • Piezoelectric and/or thermoelectric reinforced electrofiltration long-term double-effect filter material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Example 1 Polyester needle felt double-effect filter material

[0074] The specific manufacturing method of polyester needle-punched double-effect filter material can be manufactured by submerged impregnation. The process flow is as follows: figure 1 as shown,

[0075] Take an acrylic emulsion with a solid content of 65%, and add water to it to dilute it so that the solid content is 20%. Add polyvinylidene fluoride (PVDF) material powder with a mass fraction of 15% and a median diameter of 20 μm, stir evenly, and pour it into the solution container 2 as the coating emulsion 3, that is, the tank container.

[0076] Filtrate substrate 1 gets 550 grams per square meter of pure polyester needle-punched felt substrate rolls, dips through the coating emulsion 3 under the gravity pressure bar 4, and squeezes through the extrusion roller 51 to make the coating emulsion 3 into the interior of the filter material, and also squeeze off part of the excess coating emulsion 3.

[...

Embodiment 2

[0079] Embodiment 2 polyphenylene sulfide hydroentangled felt filter material

[0080] The specific manufacturing method of polyester needle-punched double-effect filter material can be manufactured by scraper method, and the process flow is as follows: figure 2 Shown:

[0081] Take a polytetrafluoroethylene emulsion with a solid content of 60%, add water to it for dilution, and make the solid content 20%. Add lead zirconate titanate piezoelectric material powder with a mass fraction of 10% and a median diameter of 15 μm, and a CaSe powder with a mass fraction of 10% and a median diameter of 15 μm, stir evenly to form a coating emulsion 3, pour Put it into the tank type container, that is, pour it into the emulsion container 2.

[0082] Get the filtrate substrate 1, that is, the pure polyphenylene sulfide hydroentangled felt substrate roll of 450 grams per square meter, and coat the coating emulsion 3 on the dusty surface of the filtrate substrate 1 by a scraper 52 under th...

Embodiment 3

[0085] Example 3 Aramid fiber and glass fiber composite needle felt filter material

[0086] The specific manufacturing method of aramid fiber and glass fiber composite needle felt filter material can be manufactured by impregnation:

[0087] Take the styrene-acrylic emulsion with a solid content of 45%, add water to it for dilution, and make the solid content 25%. Add titanium germanate piezoelectric material powder with a mass fraction of 15% and a median diameter of 10 μm, and BaTiO with a mass fraction of 10% and a median diameter of 20 μm 3 Powder, stir evenly, pour into the tank container.

[0088] Take 500 grams per square meter of aramid fiber and glass fiber surface layer, needle felt substrate roll of aramid fiber base cloth, impregnate the emulsion through the submerged type, and squeeze it through the squeeze roller to make the emulsion enter the inside of the filter material, and Squeeze off some of the excess lotion as well.

[0089] Send it into a gallery-typ...

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Abstract

The invention relates to a piezoelectric and / or thermoelectric reinforced electrofiltration long-term double-effect filter material and a manufacturing method thereof. The electrofiltration long-termdouble-effect filter material comprises a filter material base material and a coating attached to the surface of the filter material base material, wherein the coating contains a piezoelectric powdermaterial and / or a thermoelectric powder material. Under the action of wind pressure during normal-temperature gas filtration or under the dual action of heat and wind pressure during hot flue gas filtration, the piezoelectric and / or thermoelectric powder material in the surface coating spontaneously generates static electricity, so that the filter material is changed into a charged material, particles are captured by a fiber filtration mechanism while the electrostatic adsorption efficiency on fine particles is remarkable, the major problems that a conventional filter material is low in efficiency on the fine particles and easy to penetrate at present can be solved, the filtering precision and the trapping efficiency of the filter material on the fine particles are effectively improved, and the filter material is different from a conventional electret material in the aspect of application environment selection. The material becomes a double-effect filter material which can be used fora long time under severe industrial flue gas conditions such as damp heat and corrosion and can permanently generate electricity.

Description

technical field [0001] The invention relates to a piezoelectric and / or thermoelectric-enhanced long-term double-effect filter material for electric filtration and a manufacturing method thereof, belonging to the technical field of filter materials for industrial dust removal and flue gas purification. Background technique [0002] Theory and practice have proved that bag filter is the most effective technical way to control industrial dust emission and flue gas purification. As the core material of bag filter, filter material plays an extremely important role in the filter efficiency and smoke emission of bag filter. When the filter material captures particulate matter, it mainly relies on the fiber filtration mechanism. Tests have shown that the larger the particle size, the higher the collection efficiency; the smaller the particle size, the lower the filtration efficiency and the higher the escape rate of fine particles. Therefore, how to effectively improve the efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/08B01D46/02B01D46/00
CPCB01D39/083B01D46/02B01D46/0032B01D2239/0435B01D2239/10
Inventor 柳静献赫伟东常德强毛宁孙熙
Owner NORTHEASTERN UNIV
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