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Electrospinning filter material, preparation method thereof and filter cartridge prepared from electrospinning filter material

A filter material and electrospinning technology, which is applied in the field of electrospinning filter material and its preparation, can solve problems such as easy shedding of nanofiber layers, reduced filtration efficiency, and dust particles entering the interior of the filter material, so as to improve spinning efficiency and production efficiency , improve the uniformity of distribution, and ensure the effect of efficient dust removal

Pending Publication Date: 2022-03-18
QINGDAO HSJ ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two main mechanisms for mechanical filtration. One is conventional deep filtration. Dust is collected by polyester fiber filter material, and a "layer of dust cake" is formed on the surface of the filter material, and then filtered through this layer of dust cake. Follow-up dust, but with the increase of use time, dust particles are easy to enter the inside of the filter material, resulting in problems such as reduced filtration efficiency and shorter life of the filter cartridge
The other is surface filtration. By covering the surface of traditional polyester fiber filter substrate with a layer of nano or micro fiber membrane, the dust particles are intercepted and adsorbed on the surface of the filter material, so as to achieve the purpose of dust removal. This method Although the filtration efficiency and the service life of the filter cartridge have been improved to a certain extent, in the current engineering application, there are still problems such as the poor mechanical properties of the surface nano-filtration layer, and the repeated back-blowing is easy to fall off, which affects the dust removal effect. There are problems such as decreased purification efficiency, increased resistance, and increased energy consumption.
[0003] Patent CN110124413A discloses a preparation method of polymer micro / nano fibers, using polyvinyl chloride, polyvinylidene chloride and other polymers or their copolymers to prepare spinning solution, by attaching micro / nano fibers to the substrate, Using thermal compounding or the method to form a high-efficiency filter material and apply it to dust control and other fields, but the bonding force between the surface nanofiber layer and the substrate layer of this method is poor, and after repeated back-blowing in industrial dust removal, The nanofiber layer is easy to fall off, resulting in increased filtration resistance, increased energy consumption, and reduced filtration efficiency
Patent CN1562441 discloses a method for preparing a sandwich-type nano / submicron electrospinning-based filter material. The nanofiber membrane is directly spun on the filter material, and a sandwich composite material is made by hot pressing, but this method is difficult to ensure that the nanofiber The uniformity on the filter material, and the feeding speed of the filter material and the spinning speed cannot be guaranteed to be consistent during spinning, and it is difficult to guarantee the product quality

Method used

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  • Electrospinning filter material, preparation method thereof and filter cartridge prepared from electrospinning filter material
  • Electrospinning filter material, preparation method thereof and filter cartridge prepared from electrospinning filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A preparation method of electrospun filter material, comprising the following steps:

[0042] S1: Dissolve PVDF in DMAC to form a solution with a mass fraction of 15%, add 0.07% nano-silica as an electrostatic electret material and 1% 1-butyl-3-methylimidazolium chloride As an auxiliary agent, fully stir and mix evenly to make a spinning solution;

[0043] S2: Using the needle-free spinning technology, inject the spinning solution in step S1 into the spinning solution box, choose an average silk diameter of 8um, a thickness of 0.3mm, and a gram weight of 30g / m 2 The composite fiber filter paper is used as the support layer of the base material, the receiving distance of the support layer of the base material is adjusted to 15cm, the voltage of the positive and negative electrodes is adjusted to 20kv, the running speed of the base material is 4m / min, and the composite cloth is spun and woven;

[0044] S3: The composite cloth in step S2 is blown by a roller with a temper...

Embodiment 2

[0046] A preparation method of electrospun filter material, comprising the following steps:

[0047] S1: Dissolve PSU in DMF to form a solution with a mass fraction of 10%, add 0.05% nano-boehmite as an electrostatic electret material and 3% 1-butyl-2-3-methylimidazole Chloride salt is used as auxiliary agent, fully stirred and mixed evenly to make spinning solution;

[0048] S2: Using the needle-free spinning technology, inject the spinning solution in step S1 into the spinning solution box, choose an average silk diameter of 15um, a thickness of 2mm, and a gram weight of 200g / m 2 PET polyester fiber is used as the support layer of the base material, the receiving distance of the support layer of the base material is adjusted to 60cm, the voltage of positive and negative poles is adjusted to 70kv, the running speed of the base material is 20m / min, and the composite cloth is spun and woven;

[0049] S3: The composite cloth in step S2 is blown by a roller with a temperature of...

Embodiment 3

[0051] A preparation method of electrospun filter material, comprising the following steps:

[0052] S1: Dissolve PA in formic acid to prepare a solution with a mass fraction of 30%, add 0.1% mass fraction of nano-titanium dioxide as an electrostatic electret material and 2% mass fraction of 1-butyl-3-methyltetrachloroferrate As an auxiliary agent, fully stir and mix evenly to make a spinning solution;

[0053] S2: Using the needle-free spinning technology, inject the spinning solution in step S1 into the spinning solution box, choose an average silk diameter of 10um, a thickness of 0.8mm, and a gram weight of 100g / m 2 The aramid fiber cloth is used as the support layer of the substrate, the receiving distance of the support layer of the substrate is adjusted to 30cm, the positive and negative voltages are adjusted to 50kv, the operating speed of the substrate is 10m / min, and the composite cloth is spun and woven;

[0054] S3: The composite cloth in step S2 is blown with a ro...

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Abstract

The invention relates to the technical field of industrial dust removal, in particular to an electrospinning filter material and a preparation method thereof. Meanwhile, the invention also relates to a filter cartridge prepared from the electrospinning filter material. The electrospinning filter material comprises a base material supporting layer, an electrostatic spinning layer uniformly distributed on the base material supporting layer, an electrostatic electret material and / or an auxiliary agent. The filter material is high in filtering efficiency and small in filtering resistance, the preparation method of the filter material can achieve industrial production of the electrostatic spinning filter material, and meanwhile a filter cartridge prepared from the filter material is long in service life and good in filtering effect.

Description

technical field [0001] The invention relates to the technical field of industrial dust removal, in particular to an electrospun filter material and a preparation method thereof. Meanwhile, the invention also relates to a filter cartridge prepared from the electrospun filter material. Background technique [0002] Cartridge filters are widely used dust removal equipment in industrial dust control. They are widely used in welding fume, grinding fume, food processing dust and other fields. They mainly use the principle of mechanical filtration to intercept and absorb dust to achieve the purpose of dust removal. At present, there are two main mechanisms for mechanical filtration. One is conventional deep filtration. Dust is collected by polyester fiber filter materials, and a "layer of dust cake" is formed on the surface of the filter material, and then filtered through this layer of dust cake. Follow-up dust, but with the increase of use time, dust particles are easy to enter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D46/24B03C3/017D04H1/728D01D5/00D04H1/43D04H1/4318D04H1/4326D04H1/4334
CPCB01D39/14B01D46/2411B01D46/0032B03C3/017D04H1/728D01D5/0069D01D5/003D04H1/4318D04H1/43D04H1/4334D04H1/4326B01D2239/0435B01D2239/10B01D2239/0654B01D2239/065
Inventor 迟淑丽秦玲王力梁鹏刘相章白少峰
Owner QINGDAO HSJ ENVIRONMENTAL PROTECTION TECH CO LTD