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Filters for paramagnetic and diamagnetic substances

A magnetic filter and diamagnetic technology, applied in filtration separation, dispersed particle filtration, high gradient magnetic separator, etc., can solve the problem that nanoparticles cannot be effectively filtered, diamagnetic materials cannot be removed, and the efficiency of small particles is poor, etc. question

Active Publication Date: 2018-04-17
SHIN CHUANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing magnetic filters cannot remove diamagnetic materials
[0005] Filtration using screens and the like is the standard filtration used to separate diamagnetic ions from gases or liquids, but this technique is inefficient for small particles
For example, carbon nanoparticles such as particulate matter PM2.5 emitted from power plants, steel mills, and mobile sources including automobiles and motorcycles cannot be effectively reduced
Similarly, nanoparticles found in refineries and chemical plants in the form of catalyst powder, rust, carbon residue or aggregated slurries cannot be effectively filtered

Method used

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  • Filters for paramagnetic and diamagnetic substances
  • Filters for paramagnetic and diamagnetic substances
  • Filters for paramagnetic and diamagnetic substances

Examples

Experimental program
Comparison scheme
Effect test

experiment example

[0049] The following experimental examples are presented to further illustrate different aspects and embodiments of the present invention, but should not be construed as limiting the scope of the present invention. To illustrate the interaction between paramagnetic and diamagnetic substances under the influence of an external magnetic field generated by a permanent magnet, paramagnetic and diamagnetic powders were selected for different experiments. According to the mass magnetic susceptibility (MS) of a substance, substances are classified into paramagnetic and diamagnetic.

[0050] Mass susceptibility (MS) refers to the magnetic susceptibility per gram of a substance, and magnetic susceptibility refers to the degree of magnetization of a material per unit applied field. Mass susceptibility describes the magnetic response of a substance to an applied magnetic field. All substances each have a characteristic value of their mass magnetic susceptibility (MS). Paramagnetic subs...

experiment example 1

[0057] The degree or strength of magnetism exhibited by selected solid substances with high MS values ​​in a magnetic field was measured. A permanent magnet bar assembly with a magnetic field strength of 6000GS was used. The selected solid powders are: cobalt (Co), iron (Fe), nickel (Ni), nickel oxide (NiO), iron oxide (FeO and Fe 2 o 3 ), ferrous sulfate (FeSO 4 ), ferric chloride (FeCl 3 ), Ni supported on γ-alumina catalyst (Ni / γAl 2 o 3 )), dysprosium oxide (D y2 o 3 ), gadolinium trioxide (Gd 2 o 3 ), and chromium trioxide (Cr 2 o 3 ).

[0058] For each test, a precision balance (capable of weighing down to 10 -4 grams) Weigh approximately 0.5 grams of powder and place the powder in a (accurately weighed) glass container. The permanent magnet bar assembly is then placed near the powder. After aspirating the powder, remove the magnetic bar and weigh the container with residual powder (if any). Calculate the weight percent (%) of powder attracted by the bar m...

experiment example 2

[0064] This experiment verifies that the diamagnetic material itself will not be attracted by the magnetic rod. The diamagnetic materials tested are silicon, silicon carbide (SiC), γ-alumina (γAl 2 o 3 ), non-magnetic butadiene, titanium oxide (TiO 2 ), ceramics, activated carbon, polyethylene, and elemental sulfur. Magnetic butadiene was also tested. A permanent magnet rod assembly with a magnetic field strength of 6000GS was placed next to the powder sample; except for magnetic butadiene (including paramagnetic substances), no powder was attracted to the magnetic rod. The presence of a magnetic field does not induce a magnetic field in the diamagnetic material.

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Abstract

A high capacity magnetic filter separates diamagnetic and / or paramagnetic substances from fluid streams. Diamagnetic solid substances are magnetized under an external magnetic field through coordinated interaction of diamagnetic solid substances with an inducement paramagnetic material (IPM). The magnetic filter serves as a separation zone created by the presence of IPM and magnets that are shielded from the IPM by non-magnetic sleeves or partitions. The IPM in the void volume between the magnets affords large surface area onto which diamagnetic and paramagnetic materials can contact and be attracted to. The relative position and distance of the magnetic source, such a magnetic bar or electromagnet, to the solid mixture of diamagnetic and IPM are adjusted to induce sufficiently strong magnetism in the diamagnetic solids which causes the diamagnetic solids to be attracted by the magnetic field as well. Both diamagnetic and paramagnetic substances can be removed from a liquid or gas.

Description

technical field [0001] The present invention relates to a robust and high throughput magnetic filter for the removal of paramagnetic and / or diamagnetic materials from gas and liquid streams. Background technique [0002] Paramagnetic substances become magnetized when exposed to an external magnetic field. Paramagnetic substances include, for example, manganese, chromium, cerium, iron, cobalt, potassium, vanadium and their oxides or sulfides. In the absence of an external magnetic field, the magnetic dipoles of a paramagnetic molecule point in any direction, so their magnetism is zero. When an appropriate external magnetic field is applied, paramagnetic substances become magnetized because the number of magnetic dipoles aligned parallel to the direction of the magnetic field is greater than the number of magnetic dipoles aligned away from the direction of the magnetic field. [0003] Conventional magnetic filters remove paramagnetic substances or particles from a gas or liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/032B03C1/034B03C1/033B03C1/28
CPCB03C1/0332B03C1/286B03C2201/28B03C1/032B03C1/034C02F2101/203C02F2101/22C02F1/482B03C2201/18B03C2201/22B01D35/06B01D46/0034
Inventor 李茂田李福民沈子尧李寿民林瑞隆吴俊龙洪维志
Owner SHIN CHUANG TECH CO LTD
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