JP5275291B2 - Magnetic separation system and magnetic separation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic separator easy to constitute a device, even being rectangular. <P>SOLUTION: A magnetic separation system includes: a column 11 made of a non-magnetic material, which is connected with an inflow pipe 113a through which to-be-treated water enters and also connected with an outflow pipe 113b through which treated water flows out, and has a rectangular flow channel each corner of which is formed into a curved surface; a rectangular filter 12 made of two or more magnetic body materials, each corner of which is formed into a curve, and which is vertically disposed to a flow of the to-be-treated water in the flow channel of the column; a supporting means 13 made of a non-magnetic material, which has a flow channel formed in the center and a recessed part on the outer circumference, is in an annular shape along the inner wall of the flow channel of the column, and is vertically disposed to the flow of the to-be-treated water; and an O-ring 14 which is fitted in the recessed part formed in the supporting means, and is disposed in close contact with the inner wall of the column. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  Embodiments described herein relate generally to a magnetic separation system and a magnetic separation apparatus that separate magnetic particles contained in a waste liquid.

  Waste liquids discharged from factories and steelworks that perform metal processing contain magnetic particles such as iron powder. Such magnetic particles can be separated from the waste liquid by a magnetic separation device using a magnet.

  In the magnetic separation device, when passing the waste liquid through a pipe in which a magnetic metal mesh is disposed, a magnet is arranged on the outer periphery of the pipe and a magnetic field is applied to the metal mesh, thereby capturing the magnetic particles in the metal mesh and Magnetic particles can be separated. Various shapes such as a cylindrical shape and a polygonal cylindrical shape are conceivable as the shape of the pipe, but the rectangular shape is preferable in that it can be affected by a magnetic force in a wider range than the cylindrical shape.

  In the piping of the magnetic separation device, a sealing member such as an O-ring is disposed between the wire mesh and the pipe so that the waste liquid does not pass through the gap between the wire mesh and the pipe, but passes through the mesh of the wire mesh. When the piping of the magnetic separation device is cylindrical, a standard O-ring can be used as the sealing member. On the other hand, when the cross section of the pipe is a polygonal cylinder such as a rectangle, the standard O-ring cannot be used as a sealing member, and it is necessary to prepare a sealing member according to the magnetic separation device. .

  In addition, in a polygonal cylindrical pipe such as a rectangle, the pressure (water pressure) applied to the sealing member is not uniform as compared to a cylindrical pipe. For this reason, it is difficult to maintain airtightness in a square tubular pipe when pressure loss increases, and there is a problem that magnetic particles are likely to be mixed into the treated water.

JP-A-7-68109

  As described above, in the conventional technology, it is difficult to prevent the waste liquid from leaking between the wire mesh and the pipe, and the apparatus is easily configured to make the pipe shape of the magnetic separation device square. There was no current situation.

  In view of the above-described problems, an embodiment of the present invention provides a magnetic separation system and a magnetic separation device that are easy to configure even if they are rectangular and improve the recovery rate of magnetic particles from waste liquid.

  In order to solve the above problems, the magnetic separation device according to the embodiment is connected to an inflow pipe into which the water to be treated flows in and is connected to an outflow pipe through which the treated water flows out, and each rectangular corner is formed into a curved surface. A column of non-magnetic material having a formed flow path, and a plurality of magnetic material filters in which each corner of the rectangle is formed into a curved line and arranged perpendicular to the flow of water to be treated in the flow path of the column; A non-magnetic material that is formed in a ring shape along the inner wall of the flow path of the column and that is formed perpendicular to the flow of the water to be treated. A support means and an O-ring that is fitted in a recess formed in the support means and arranged in close contact with the inner wall of the column.

1 is a perspective view of a magnetic separation system according to an embodiment. It is a perspective view of the magnetic separation apparatus concerning an embodiment. It is sectional drawing of the magnetic separation apparatus of FIG. It is a figure explaining the structure of the magnetic separation apparatus of FIG. It is a figure explaining the O-ring of the magnetic separation apparatus of FIG. It is a figure explaining the magnetic field of a magnetic separation system.

  Hereinafter, a magnetic separation system and a magnetic separation device according to an embodiment will be described with reference to the drawings. As shown in FIG. 1, the magnetic separation system 1 according to the embodiment includes a magnetic separation device 10 and a magnetic field application device 20 in which a first magnet 201 a and a second magnet 201 b are connected by a yoke 202. In the magnetic separation apparatus 10, water to be treated containing magnetic particles such as iron powder such as waste liquid discharged from a factory or the like flows in, and the magnetic particles are separated and collected from the water to be treated.

  In the magnetic field application device 20 of the magnetic separation system 1 shown in FIG. 1, the N pole of the first magnet 201a and the S pole of the second magnet 201b (or the S pole of the first magnet 201a and the N pole of the second magnet 201b) are provided. It is installed to face each other. Further, in the magnetic separation system 1, the magnetic separation device 10 is disposed between the first magnet 201a and the second magnet 201b whose opposite surfaces face each other. That is, in the magnetic separation system 1, the magnetic separation device 10 is disposed in a magnetic field space formed by the first magnet 201a and the second magnet 201b. The magnets 201a and 201b may be permanent magnets or electromagnets as long as opposing surfaces are arranged opposite to each other.

  FIG. 2 is a perspective view of the magnetic separation device 10, and FIG. 3 is a longitudinal sectional view of the magnetic separation device 10 taken along the line A-A 'in FIG. The magnetic separation device 10 is connected to the inflow pipe 113a into which the water to be treated flows and the outflow pipe 113b from which the treated water flows out, and has a non-magnetic material having a flow path in which each rectangular corner is formed into a curved surface. Column 11, each corner (corner) of the rectangle is formed in a curve, and a plurality of filters 12 made of a plurality of magnetic materials arranged in a flow path of column 11 perpendicular to the flow of water to be treated, and the center Is formed in a ring shape having a recess 131 on the outer periphery and along the inner wall of the flow path of the column 11, and is perpendicular to the flow of the water to be treated in the flow path of the column 11. A support means 13 that is disposed and supports the filter 12, and an O-ring 14 that is fitted in the recess 131 of the support means 13 and is disposed in close contact with the inner wall of the column 11.

  The column 11 has a cylindrical shape and a hollow portion formed as a flow path. Specifically, the column 11 includes a rectangular tube portion 111 having both ends opened, and a first lid portion 112a that closes one opening portion of the tube portion 111 and is connected to an inflow pipe 113a that flows in water to be treated. The second opening 112b is connected to the outflow pipe 113b that closes the other opening of the cylinder 111 and flows out the treated water. FIG. 4A shows a cross section of the cylindrical portion 111 of the column 11 at a position indicated by B-B ′ in FIG. 3. As shown in an example of FIG. 4A, the cross section of the column 11 is a rectangle such as a square, and each corner 114a to 114d of the flow path is formed in a curve (for example, about R5). The column 11 is formed of a non-magnetic material that is not affected even when the magnetic field applying device 20 applies a magnetic field.

  As shown in the example of FIG. 4B, the filter 12 is a rectangular wire mesh in which each corner 121a to 121d is formed in a curved line (for example, about R5). Although this filter 12 has the same shape as the cross section of the flow path of the column 11, it is slightly smaller than the cross section of the flow path (for example, about 0.2 mm smaller) because it is disposed in the flow path of the column 11. Has been. The filter 12 is formed of a magnetic material that becomes magnetic when the magnetic field applying device 20 applies a magnetic field.

  As shown in FIG. 4C, the support means 13 is a ring-shaped member whose outer periphery is the same rectangle as the inner periphery of the flow path of the column 11 and whose inner side is a flow path. Moreover, the recessed part 131 is formed in the outer periphery of the support means 13, and each corner 132a-132d is formed in the curve (for example, about R5). FIG. 5 is an enlarged view of a portion indicated by C in FIG. As shown in FIG. 5, the O-ring 14 is fitted into the recess 131 formed along the outer periphery of the support means 13. The support means 13 is formed of a non-magnetic material that is not affected even when the magnets 201a and 201b of the magnetic field applying device 20 apply a magnetic field.

  In the example shown in FIG. 5, there is a gap between the filters 12, but it is not necessary to provide a gap between the filters 12, and each surface of the filter may be in contact.

  The O-ring 14 used in the magnetic separation device 10 is a circular, ring-shaped standard O-ring used for sealing. The O-ring 14 is selected so that the circumference thereof matches the length around the inner wall of the column 11 and the length of the recess 131 formed on the outer periphery of the support means 13. Some standard O-rings are made of a material such as metal that does not deform while retaining a circular shape. The O-ring 14 used in the magnetic separation device 10 is provided between the inner wall of the rectangular column 11 and the support means 13. It is used for sealing. Therefore, the O-ring 14 is a standard O-ring that can be deformed according to the shape of the column 11 and the support means 13 made of rubber or the like.

  As shown in FIG. 3, the support means 13 in which the plurality of filters 12 and the O-ring 14 are fitted is installed in the flow path of the column 11. FIG. 3 shows an example in which a plurality of filters 12-support means 13-a plurality of filters 12-a support means 13-a plurality of filters 12 are installed in the column 11 in this order. In the case of the magnetic separation device 10 shown in FIG. 3, after the filter 12 and the support means 13 in which the O-ring 14 is fitted in the recess 131 are arranged in the flow path of the column 11, a cylinder is used by using a seal member, a screw or the like. By fixing the part 111 and each cover part 112a, 112b, it seals.

  When the magnetic material is separated from the water to be treated using the magnetic separation system 1, a magnetic field is applied to the magnetic separation device 10 by the magnetic field application device 20, and then the magnetic separation device 10 is passed through the inflow pipe 113a. Water to be treated is supplied inside. The treated water supplied into the magnetic separation apparatus 10 flows out from the outflow pipe 113b as treated water while passing through the plurality of filters 12 arranged in the flow path of the column 11. Since a magnetic field is applied to the magnetic separator 10, the magnetic filter 12 is magnetized. Therefore, the magnetic separation apparatus 10 captures the magnetic particles of the water to be treated which are introduced by the magnetized filter 12, and flows out the liquid in which the magnetic particles are captured as the treated water.

  At this time, in the magnetic separation system 1, the water to be treated does not pass through the eyes of the filter 12 by arranging the support means 13 in which the O-ring 14 that is a sealing member is fitted between the filter 12 and the filter 12. In addition, it is possible to prevent passage through the gap between the inner wall of the column 11 and the edge of the filter 12. That is, it is possible to prevent magnetic particles from being mixed into the treated water.

  When the support means 13 is installed in the column 11, it is necessary to install the support means 13 perpendicularly to the inner wall of the column 11 in order to prevent leakage of treated water into the treated water. When the support means 13 is not perpendicular to the column 11, it becomes difficult to maintain the pressure balance in the column 11 when the filter 12 is clogged and the pressure loss becomes high, and at the four corners of the inner wall of the column 11. A gap is easily formed between the O-ring 14 and the O-ring 14.

  Here, as the water to be treated is passed through a large number of filters 12, a larger amount of magnetic particles are captured by the filter 12. Therefore, as the number of filters 12 increases, the amount of magnetic particles to be captured increases and the quality of the treated water improves. Further, as the number of supporting means 13 and O-rings 14 to be used increases, the sealing by the O-ring 14 with respect to the flow of water to be treated becomes more stable, and mixing of magnetic particles into the treated water can be prevented. The number of filters 12 that can be arranged in the column 11 is limited by the width required for the arrangement of the support means 13. Therefore, the number of filters 12 and the number of support means 13 and O-rings 14 used in the magnetic separation device 10 take into consideration the separation performance of magnetic particles from the water to be treated using the filter 12 and the airtightness of the O-rings 14. Determined.

  Here, the column 11 has a rectangular cross section, as shown in FIG. 6, even when the same magnet is used rather than a circle, the cross sectional area is increased by about ¼, and in the strong magnetic field space. This is because the included range is widened and the amount of magnetic particles captured is increased. That is, the closer to the magnets 201a and 201b, the stronger the magnetic field space, and the closer to the yoke 202 or the space not in contact with the magnet, the weak magnetic field space. In the case of a circle, not only the cross-sectional area is smaller than in the case of a rectangle, but also the space included in the weak magnetic field space is reduced, but the range included in the strong magnetic field space is also reduced. Therefore, by using the rectangular column 11, magnetic particles can be efficiently captured using a strong magnetic field space widely.

  In the magnetic separation system 1, when the amount of magnetic particles captured by the filter 12 increases, newly introduced magnetic particles are less likely to be captured. Therefore, in the magnetic separation system 1, when the amount of magnetic particles captured decreases and the quality of the treated water deteriorates, the magnetic field application device 20 stops applying the magnetic field to the magnetic separation device 10 and reverses from the outflow pipe 113b. A so-called back washing is performed in which washing water is supplied and magnetic particles are discharged from the inflow pipe 113a. In the magnetic separation system 1, after the backwashing, if magnetic field is applied to the magnetic separation device 10 again by the magnetic field application device 20 and the water to be treated is supplied, the magnetic particles in the water to be treated can be captured.

  In the magnetic separation apparatus 10, the corner formed by the two wall surfaces of the flow path in the column 11 is not a right angle but a curve, and the corner of the support means 13 is also a curve. Therefore, it is not necessary to specially prepare a sealing member having a right-angled corner portion corresponding to the magnetic separation device 10, and an O-ring generally used in a circular shape can be used as the sealing member. That is, when the corner portion between the flow path in the column 11 and the support means 13 is a right angle, in the case of a circular O-ring, not only the airtightness is low but the O-ring is easily cut, but the corner portion is curved. By doing so, sufficient airtightness can be maintained by the O-ring.

  As described above, in the magnetic separation system 1 according to the embodiment, since the magnetic field range to be used can be expanded by making the shape of the column 11 of the magnetic separation device 10 rectangular, the separation efficiency of magnetic particles is improved. can do. Moreover, since the O-ring of the standard goods which can be obtained easily can be used, the magnetic separation apparatus 10 can be manufactured easily. Furthermore, since there is no right-angled portion, magnetic particles can be prevented from being mixed into the treated water due to pressure, and the separation efficiency of the magnetic particles can be improved.

  Although an embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, rewrites, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Magnetic separation system 10 ... Magnetic separation apparatus 11 ... Column 111 ... Tube part 112a ... 1st cover part 112b ... 2nd cover part 113a ... Inflow pipe 113b ... Outflow pipe 114a-114d ... Corner 12 ... Filter 121a-121d ... Corner DESCRIPTION OF SYMBOLS 13 ... Support means 131 ... Concave part 132a-132d ... Corner 14 ... O-ring 20 ... Magnetic field application apparatus 201a ... 1st magnet 201b ... 2nd magnet 202 ... Yoke

Claims (2)

A magnetic separation device that separates magnetic particles from the water to be treated flowing in using a filter of a magnetic material, and a magnet that is installed outside the magnetic separation device and applies a magnetic field to the magnetic separation device,
The magnetic separator is
A column of non-magnetic material connected to an inflow pipe into which the water to be treated is introduced, connected to an outflow pipe from which the treated water flows out, and having a flow path in which each rectangular corner is formed into a curved surface;
Each of the corners of the rectangle is formed in a curved line, and a plurality of magnetic material filters arranged perpendicular to the flow of the water to be treated in the flow path of the column,
A non-magnetic material having a flow path formed in the center and having a recess on the outer periphery, a ring shape along the inner wall of the flow path of the column, and arranged perpendicular to the flow of water to be treated Support means;
A magnetic separation system comprising: an O-ring that is fitted in a recess formed in the support means and is disposed in close contact with an inner wall of the column. A column of non-magnetic material connected to an inflow pipe into which the water to be treated is introduced, connected to an outflow pipe from which the treated water flows out, and having a flow path in which each rectangular corner is formed into a curved surface;
A plurality of filters made of a magnetic material, each corner of the rectangle being formed into a curve, and arranged perpendicular to the flow of water to be treated in the flow path of the column;
A non-magnetic material having a flow path formed in the center and having a recess on the outer periphery, a ring shape along the inner wall of the flow path of the column, and arranged perpendicular to the flow of water to be treated Support means;
An O-ring that is fitted into a recess formed in the support means and arranged in close contact with the inner wall of the column;
A magnetic separation device comprising:

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