De-ironing method and device for fluid

Abstract

The invention discloses a de-ironing method and device for a fluid. The device comprises a fluid passage, a soft magnetic medium and a magnet, and the soft magnetic medium comprises a plurality of parallel bars. The device is characterized in that the device is provided with a strongly magnetic ferromagnetic substance absorption area and a weakly magnetic ferromagnetic substance absorption area insequence along the flowing direction of the fluid; projections are distributed on the outer surfaces of the bars in the strongly magnetic ferromagnetic substance absorption area; the cross sections of the bars in the weakly magnetic ferromagnetic substance absorption area are square or prismatic; the space between the adjacent bars in the strongly magnetic ferromagnetic substance absorption areais greater than that between the adjacent bars in the weakly magnetic ferromagnetic substance absorption area. Compared with the prior art, the device can effectively clean ferromagnetic substances inthe fluid, moreover, gaps in the soft magnetic medium inside a magnetic field is unlikely to be blocked by the absorbed ferromagnetic substances, and the device has the advantage of high de-ironing efficiency.

Description

technical field [0001] The invention relates to a magnetic separation technology, in particular to a fluid iron removal technology. Background technique [0002] Existing fluid iron removal, such as ceramic slurry iron removal or air blown ceramic dry powder iron removal, in order to achieve a high iron removal effect, the magnetic medium iron removal method is generally used, that is, a soft magnetic medium is installed in the fluid channel Components, soft magnetic medium components are either several soft magnetic rod groups arranged in parallel, or soft magnetic steel bristles, and a magnetic field mechanism is arranged outside the fluid passage, such as south poles, Permanent magnets or electromagnetic devices opposite to the north pole, so as to form a magnetic field to act on the soft magnetic medium component, and the soft magnetic medium component is magnetized under the action of the magnetic field, so that the adjacent soft magnetic rods that constitute the soft m...

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Problems solved by technology

However, the sharp protrusions have a small active surface, and the amount of ferromagnetic substances absorbed is small. For this reason, people have designed magnetic rods with several protrusions on the surface, or used soft magnetic steel bristles, so that the magnetic attraction and A balance is achieved between the magnetic attraction surfaces. At the same time, the reduced magnetic force is compensated by reducing the distance between adjacent soft magnetic media. However, the smaller distance easily leads to the space between adjacent soft magnetic media being blocked by ferromagnetic substances. , but it affects the iron removal effect. For this reason, people have designed the technology disclosed in patent 201310278903.1, which divides several thin strips with protrusions on the surface (triangular cross-section) into several layers, and along the direction of fluid flow , the spacing between thin strips of each layer gradually becomes smaller, although, through layering, the soft magnets with large spacing absorb ferromagnetic substances with strong magnetic properties, while the soft magnets with small spacing absorb ferromagnetic substances with weak magnetic properties, in order to achieve It can not only effectively remove ferromagnetic substances, but also delay the space between soft magnetic media from being blocked by ferromagnetic substances to improve the efficiency of iron removal. However, due to the ferromagnetic substances contained in the fluid, the ferromagnetic substances with strong Although the thin strips with a triangular cross-section have strong magnetic attraction, due to the small area of ​​magnetic attraction, they cannot meet the requirements of absorbing a large amount of strong magnetic ferromagnetic substances, resulting in a part of the strong magnetic ferromagnetic substances entering the upper surface. In the soft magnetic medium layer with a small spacing between layers, the problem of clogging in a short time and affecting the efficiency of iron removal also occurs

Patent application 201310465592.X discloses a technology that solves the problem of ferromagnetic substances clogging the space between soft magnetic media. Although this technology solves the problem of remanence caused by the blocked ferromagnetic material itself, it is relatively firmly adsorbed on the soft magnetic medium. However, there is no solution to the problem that the soft magnetic medium is easy to be quickly blocked by the adsorbed ferromagnetic material due to the small distance between the objects and the large magnetic attraction force.

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