Magnetic separation fluid iron removal method and device

Abstract

The invention discloses a magnetic separation fluid iron removal method and device. The device comprises magnetic field, a fluid passage, a plurality of soft magnetism medium layers which are composed of a plurality of soft magnetism media and arranged in the fluid passage, and a soft magnetism medium cleaning mechanism, and is characterized in that symmetrical parts on the two sides of the section of each soft magnetism medium are convex parts; the space between the outermost ends of the two convex parts is greater than that between the two ends of other positions of the section of the soft magnetism medium; two adjacent soft magnetism media of each layer are arranged in parallel; the soft magnetism medium is rotationally arranged in the fluid passage. Compared with the prior art, the device has the advantage that the device can not only effectively absorb weak magnetic ferromagnetic substance in the fluid, but also effectively clean the soft magnetism medium at the same time.

Description

Technical field: [0001] The invention relates to a magnetic separation method and device. Background technique: [0002] The existing technology of using magnetic field gradient to remove iron from fluid is to set a soft magnetic medium in a magnetic field, then flow the fluid through the magnetic medium, and use the magnetic medium magnetized by the magnetic field to absorb the ferromagnetic substances in the flowing fluid, thereby To achieve the purpose of iron removal, in order to improve the ability of the magnetized soft magnetic medium to absorb ferromagnetic substances, the magnetic attraction part of the soft magnetic medium is often protruding, so that the magnetic force of the soft magnetic medium is concentrated on the protruding part. At the same time, as much as possible Shorten the spacing between the protruding parts of the soft magnetic medium, although this technology can effectively remove ferromagnetic substances including weak magnetism in the fluid, but ...

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Problems solved by technology

[0002] The existing technology of using magnetic field gradient to remove iron from fluid is to set a soft magnetic medium in a magnetic field, then flow the fluid through the magnetic medium, and use the magnetic medium magnetized by the magnetic field to absorb the ferromagnetic substances in the flowing fluid, thereby To achieve the purpose of iron removal, in order to improve the ability of the magnetized soft magnetic medium to absorb ferromagnetic substances, the magnetic attraction part of the soft magnetic medium is often protruding, so that the magnetic force of the soft magnetic medium is concentrated on the protruding part. At the same time, as much as possible Shorten the spacing between the protruding parts of the soft magnetic medium, although this technology can effectively remove ferromagnetic substances including weak magnetism in the fluid, but because the spacing between the protruding parts of the soft magnetic medium is relatively small, When the amount of ferromagnetic material absorbed by the protruding parts is enough to connect the two protruding parts, a magnetic short circuit is formed, so that no magnetic field gradient can be formed between the two protruding parts, thus greatly reducing the magnetic field gradient of the protruding parts. The magnetic force greatly weakens the magnetic attraction force. At the same time, the ferromagnetic material accumulated between the two protrusions also seriously blocks the passage of the fluid. At this time, even if the soft magnetic medium is removed from the magnetic field and cleanly attached to the protrusions The ferromagnetic material on the protruding part, after moving away from the magnetic field, the ferromagnetic material is a non-soft magnetic medium, so there is still a relatively strong magnetic force, combined with the narrow space between the protruding parts, it brings great cleaning Difficult, it is not easy to clean the ferromagnetic material attached to the protruding part by general cleaning methods such as vibration method, water washing method, air blowing cleaning method or a combination of these methods. Moreover, limited by the nature of the fluid, If the fluid is solid powder, the cleaning method can only be vibration and air blowing cleaning methods, and these methods cannot meet the requirements for the soft magnetic media with several layers of layers.

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