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Magnetic composite non-woven filter bag for removing magnetic fine particles and preparation method of filter bag

A magnetic and filter bag technology, which is applied in the field of magnetic composite non-woven filter bag for removing magnetic fine particles and its preparation, can solve the problems of low collection efficiency, achieve improved removal effect, high temperature resistance and flame retardancy, and structural design reasonable effect

Active Publication Date: 2019-07-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a magnetic composite non-woven filter bag for removing magnetic fine particles and its preparation method, which overcomes the defect of low collection efficiency of fine particles in existing dust removal filter bags. The present invention is based on magnetic aggregation technology, On the basis of the filter bag manufacturing process, magnetic fibers are introduced, and the magnetic filter bag is prepared, so that the fine particles can be magnetically aggregated on the surface of the filter bag and captured by the fibers, which can greatly improve the removal effect of fine particles

Method used

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  • Magnetic composite non-woven filter bag for removing magnetic fine particles and preparation method of filter bag
  • Magnetic composite non-woven filter bag for removing magnetic fine particles and preparation method of filter bag
  • Magnetic composite non-woven filter bag for removing magnetic fine particles and preparation method of filter bag

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Effect test

Embodiment 1

[0040] 42.2 g of P84 fibers with a diameter of 15 μm were soaked in 5% HCL solution for 5 hours, washed with deionized water three times, dried at 50° C. for 6 hours, and then used. Then put 2000ml of deionized water and absolute ethanol (2:1 molar ratio) in the constant temperature reaction tank (HH-4), adjust the pH of the solution to 1~2 with hydrochloric acid, and then put 22.5g of cobalt ferrite nano Particles (particle size: 50nm) and 4.5g titanate coupling agent NDZ-201, the solution was ultrasonically dispersed for 30min, then put into the pretreated P84 fiber, then shaken at a speed of 700r / min for 12h, and then passed Filter, wash with deionized water and absolute ethanol repeatedly for 3 times, and dry at 50°C for 12 hours to obtain magnetic P84 fibers loaded with magnetic cobalt ferrite nanoparticles, followed by pre-opening, fine opening, mixing, pre-feeding, and carding , net laying, traction, acupuncture, glue spraying system, heat setting, slitting, coiling, an...

Embodiment 2

[0051] First, the P84 fiber with a diameter of 15 μm was soaked in a 5% HCL solution for 5 hours, washed with deionized water, dried, and then put into the reaction tank (HH-4) with deionized water and absolute ethanol ( The molar ratio is 2:1), adjust the pH of the solution to 2 with hydrochloric acid, then add quantitative cobalt ferrite nanoparticles (particle size: 50nm) and pretreated P84 fibers, and add an appropriate amount of titanate coupling agent to the mixed solution NDZ-201, the ratio of P84 fiber, cobalt ferrite particles, coupling agent and absolute ethanol: 1g:0.1g:0.03g:5ml. Then ultrasonically disperse the solution for 30 minutes, shake it at a speed of 700r / min for 12 hours, then filter, wash with deionized water and absolute ethanol for 3 times, and dry at 50°C for 12 hours to obtain magnetically loaded cobalt ferrite nanoparticles. magnetic P84 fiber. Then, the film-coated fiber, magnetic P84 fiber and short PTFE fiber are 15%:70%:15% by weight, respectiv...

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Abstract

The invention relates to a magnetic composite non-woven filter bag for removing magnetic fine particles and a preparation method of the filter bag. The magnetic composite non-woven filter bag sequentially comprises a fiber film coating layer, a magnetic P84 fiber filtering material layer and a poly tetra fluoroethylene (PTFE) non-woven base cloth layer. Magnetic P84 fibers and short PTFE fibers are respectively prepared into the filtering material layer and the non-woven base cloth; the magnetic material layer and the non-woven base cloth layer are subjected to needling compounding; then fiberhot-pressing film coating is carried out on the windward side of a magnetic filter material to obtain a composite filter material; and drying, heat setting, surface calendaring, reeling and magnetizing are carried out to obtain the magnetic composite non-woven filter bag. In the magnetic composite non-woven filter bag, the P84 fibers are high in high temperature resistance and good in flame retardancy; through film coating by the functional fibers, the filter bag is high in acid and alkali resistance and high in air permeability, surface magnetic induction intensity of the filter bag is high,and the removal effect on PM2.5 magnetic fine particles is very obvious; and the preparation method is simple and practical, is low in cost and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of filter bags and their preparation, in particular to a magnetic composite non-woven filter bag for removing magnetic fine particles and a preparation method thereof. Background technique [0002] The current electrostatic dust removal and bag dust removal technologies have a very low removal efficiency for magnetic fine particles with a particle size of 0.1-2.5 μm, and the discharge of a large amount of fine particles causes a great burden on the environment. Non-toxic trace heavy metal elements are also easy to accumulate on its surface, causing harm to the human body. PM2.5 magnetic fine particles are mainly high-temperature composite compounds composed of sendust-aluminum materials, which have high magnetic susceptibility. Combined with the ferromagnetic characteristics of magnetic fine particles, the use of magnetic aggregation technology is a promising magnetic Fine particle removal method. The so-called magn...

Claims

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Application Information

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IPC IPC(8): B01D50/00B01D46/02B01D46/00B01D39/08
CPCB01D39/083B01D46/0001B01D46/0034B01D46/02B01D50/00
Inventor 刁永发周发山张俪安张腾
Owner DONGHUA UNIV
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