JPS61153117A - Magnetic filter - Google Patents

Abstract

PURPOSE:To separate continuously magnetic particles trapped by magnetic lines by inducing the magnetic particles trapped by the magnetic lines from the first chamber into the second chamber, rotating a couple of electrically conductive disks to reduce the magnetism of the second chamber and introducing a washing liq. into the second chamber. CONSTITUTION:A liq. introduced through an inflow pipe 2 is passed between magnetic lines 9 vibrated by a vibrator 10, and trapped by the magnetic lines. Magnetic particles are repeatedly adhered to and separated from the magnetic lines, transported on the magnetic lines in the direction of an X axis, passed through the through-holes of a partition body 6, and induced into the second chamber 8. A couple of electrically conductive disks 11 are rotated at high speed to reduce periodically the magnetism in the second chamber, washing water is simultaneously allowed to flow to release easily the magnetic particles from the magnetic lines and the particles are discharged through a water discharge pipe 5.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention is a method for removing minute magnetic particles mixed in a fluid.
This relates to a magnetic filter that continuously removes N by magnetic force.

[Conventional technology]

FIG. 6 is a block diagram showing the structure of a conventional magnetic filter. In the figure, (14) Fi is an annular excitation coil arranged inside a return frame (15) which serves as a return path for magnetic flux, and a filter container (16) is attached to the central part.

A filter element (17) made of a plurality of magnetic wires is mounted inside the filter container (16). The filter container (16) has an inflow pipe (18) and an outflow pipe (
19) are connected, and the inflow pipe (18) is connected to the wash water outflow pipe (2
0), but the outflow pipe (19) also has a wash water inflow pipe (21).
are connected, and each pipe has a valve v18゜V1G+V
20+V2□ is marked with fX. Note that arrows indicate fluid flow. The same shall apply hereinafter.

Next, the effect will be explained. In Fig. 4, when the magnetic coil (14) is energized, a magnetic flux is generated parallel to the liquid flow direction in the filter container (16).
17) is magnetized and forms a strong magnetic field gradient around it, forming a so-called high-gradient magnetic filter. In this state, the liquid containing magnetic particles is introduced into the inlet tube (18
), the magnetic particles contained in the liquid that passes through the filter element (17) are captured by the magnetic wires, and the liquid from which the magnetic particles have been separated is discharged through the outflow pipe (19). At this time, only Vll and Vll are opened, and valve V! o,
VH closes.

As the magnetic particles accumulate on the filter membrane (17), the separation performance gradually deteriorates. For this reason, it is necessary to clean the filter at regular intervals. That is,
The excitation coil (1) is de-energized to eliminate the magnetic field, valves V111+V19 are closed, and the valve Ventvn is connected to supply cleaning water through the cleaning water inlet pipe (21) to remove the magnetic particles deposited on the filter element (17). is removed and discharged from the wash water outflow pipe (20) to regenerate the filter,
Open mill + V 19 again and valve VentV21
to supply the liquid to be purified.

The above cycle is repeated to separate the magnetic particles.

[Problem that the invention seeks to solve]

Since the conventional magnetic filter is constructed as described above, the magnetic particles deposited on the filter element (17) must be removed by cutting off the current in the excitation coil (1), opening and closing the valve, The filter must be cleaned with a cleaning solution. Unfortunately, it is not possible to continuously separate and remove liquids containing magnetic particles. In particular, when the concentration of particles containing magnetic particles is high, the scalp becomes extremely sensitive, resulting in problems such as a decrease in the operating rate of the filter.

The present invention was made to solve this problem, and an object of the present invention is to provide a magnetic filter that continuously separates and removes magnetic particles from a fluid containing magnetic particles.

[Means for Solving the Problems] The magnetic filter according to the present invention separates the containers by a partition having a plurality of through holes. A second chamber is formed, a plurality of magnetic wires are passed through the through-holes of the partition and stretched between the first and second chambers, and a magnetic field is generated that intersects these magnetic wires to generate magnetic particles. is captured in a magnetic @, the captured magnetic particles are guided from the first chamber to the second chamber, and when the magnetic particles are separated from the magnetic wire, a pair of conductive disks facing each other with the second chamber in between is inserted. The device is rotated to reduce the magnetic field in the second chamber, and a cleaning fluid is flowed into the second chamber to separate the magnetic particles from the magnetic wire and discharge them.

[Effect]

This release #! In A, a pair of conductive disks face each other with the second chamber in between to guide the magnetic particles captured by the magnetic wire from the first chamber to the second chamber and to separate the magnetic particles from the magnetic wire. The cleaning fluid is rotated to reduce the magnetic field in the second chamber, and the cleaning fluid is flowed into the second chamber to separate and expel the magnetic particles from the magnetic wire, thereby continuously and effectively removing magnetic particles from the fluid containing magnetic particles. Particles can be separated and removed.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
FIG. 1 is a plan view showing the configuration of a magnetic filter according to an embodiment of the present invention. FIG. 2 is a front view thereof. FIG. 3 is a cross-sectional view of a portion of the filter container, and the conductive disk is shown by an imaginary line. FIG.

In FIG. 2, (1) is a filter container made of a non-magnetic material. (2) is an inflow pipe for liquid containing magnetic particles, (3) is an outflow pipe for purified liquid from which magnetic particles have been removed, (4) is a water supply pipe for cleaning water, and (5) is a separated magnetic particle and a drain pipe for washing water. (6) is a partition having a plurality of through holes, which separates the filter container (υ) into a first chamber (7) into which liquid containing magnetic particles flows and captures the magnetic particles.
and a second chamber (8) in which the captured magnetic particles are released.
It is separated into two parts. (9) is a plurality of magnetic wires that pass through the through-hole of the partition and are fixed at both ends to the filter container so as to be parallel to each other;
) A vibrator (11) housed in the filter container (1) is used to vibrate the liquid and magnetic lines in the second chamber (8) when the wash water passes through the second chamber (8). Room (8)
It is a pair of conductive disks that rotate at high speed while facing each other with a second chamber in between, so as to reduce the magnetic field inside.
), the pair of disks are connected to each other. (13)
The magnetic field generated by a pair of magnetic poles facing each other with the Fi filter container interposed intersects a plurality of magnetic lines (9), and the strength of the magnetic field increases monotonically from the first room to the second room. The distance between the two magnetic poles is gradually becoming shorter. Note that a monotonous increase refers to a case where the slope of the magnetic field strength is positive or zero.

In the nine magnetic gaps formed with the lia poles (13) facing each other, the magnetic fields generated in the biaxial directions have a gradient distribution in which the strength increases in the X-axis direction. Filter valley in this magnetic gap! ! The magnetic wire (9) in (1) is magnetized.

The liquid to be purified entering through the inlet pipe (2) passes between the magnetic wires (9). At this time, a magnetic attraction force proportional to the strength of the magnetic field and the magnitude of the magnetic gradient acts on the magnetic particles, and the magnetic line (9)K is captured. The captured magnetic particles repeatedly attach to and detach from the magnetic wire due to the flow of liquid, but in order to make this repetition a reality, the filter container (1) is fixed in vibration. The magnetic wire (9) is forced to f2# by the particle (10). On the other hand, due to the magnetic gradient increasing in the X-axis direction, a magnetic force in the X-axis direction acts on the magnetic particles, so they stick to the magnetic wire and separate. The magnetic particles repeating this are conveyed in the X-axis direction on the magnetic wire (9), pass through the through hole of the partition (6), and are guided into the second chamber (8) K.

In the second chamber (8), a pair of conductive disks facing each other with the second chamber (8) in between are periodically rotated at high speed so as to periodically reduce the magnetic field within this chamber.

In this case, the magnetic attraction force that captured the magnetic particles in the magnetic wire (9) is synchronously reduced, and by flowing the cleaning water in synchronization with this, the magnetic particles can easily separate from the magnetic wire. , drain through the drain pipe (5). On the other hand, the liquid that has passed through the darkness of the magnetic lines and had its magnetic particles removed flows through the outflow pipe (3
It flows out through the tube.

FIG. 4 is a magnetic field strength distribution diagram showing the relationship between the positions of magnetic lines and conductive disks and magnetic gradients. FIG. 5 is an explanatory diagram of the magnetic flux shielding effect due to high speed rotation of the conductive disk.

In Figure 4, when magnetic particles captured by magnetic lines are guided from the first room to the second room, the distribution of the magnetic field strength HO becomes curve A and increases monotonically from the first room to the second room. are doing. On the other hand, when the magnetic particles induced in the second chamber are separated from the magnetic wire,
A pair of conductive disks (11) facing each other are rotated at high speed. As a result, the distribution of the magnetic field strength HO decreases in the second room as shown by curve B. That is, as shown in FIG. 5, a magnetic pole (13
) is placed and the disk (11) is rotated at high speed, eddy current flows within the disk and induces magnetic flux in the opposite direction to the magnetic flux between the magnetic poles, and as a result, the magnetic flux between the magnetic poles is shielded. It is from. Note that this magnetic flux shielding effect becomes more pronounced as the conductive disk rotates faster.

As the magnetic field in the second chamber decreases, the cleaning water is caused to flow into the second chamber, causing the magnetic particles in the second chamber to separate from the magnetic wire and be discharged. Thereafter, the rotation of the pair of conductive disks (11) is stopped and the distribution of the magnetic field strength Ho returns to the curve M again. This is returned *b to induce and detach the magnetic particles.

In the above ε embodiment, vibration of the magnetic wire by a vibrator and a magnetic gradient that increases monotonically in the The particles may be moved from the first chamber to the second chamber by vibrating strongly in the direction and by the attractive force. Also,
In the through-hole of the partition, part of the liquid to be purified flows in the X-axis direction, so the fluid resistance force is expressed as iwJ or F.
Even when used in conjunction with the i-magnetic gradient, the same effect as in the above example is achieved.

In the above and Examples, a magnetic gradient that increases monotonically in the X-axis direction is used as a means for attracting magnetic particles. The magnetic field may be moved to the second room.

In the above embodiment, the l-type wires pass through the through-holes of the partition and are fixed at both ends to the filter container so that they are 1,000 rows apart from each other. The end may be fixed to the

In the above example, the liquid containing magnetic particles passed through the magnetic filter, but a gas containing magnetic particles may also be used. However, it may be allowed to flow constantly regardless of the rotation of the conductive disk.

〔Effect of the invention〕

As described above, this invention is divided into two parts by a partition body having a plurality of through holes. A container forming a second chamber is inserted through the through hole of the partition body to form a first chamber and a second chamber.
A magnetic field is generated that intersects multiple magnetic wires stretched between the first and second chambers, and a fluid containing magnetic particles flows into the first chamber. Let me,
means for trapping magnetic particles with the magnetic wires in the darkness passing between the magnetic wires; means for guiding the magnetic particles to attract the magnetic particles from the first room to the second room along the magnetic wires; and rotating a pair of conductive disks facing each other with the second chamber in between so as to reduce the magnetic field in the second chamber when separating the magnetic particles from the magnetic wire, and flowing a cleaning fluid into the second chamber. In addition, since the second chamber is equipped with a magnetic particle separation means for discharging the magnetic particles together with the cleaning fluid, the magnetic particles can be continuously separated from the fluid containing magnetic particles, and compared to conventional methods, This has the effect of increasing the operating rate of the filter.

Note that the magnetic field in the second chamber is periodically reduced by the rotation of the conductive disk, and in synchronization with this, the cleaning fluid is supplied to the second chamber.
If the cleaning fluid is allowed to flow into the room, the amount of cleaning fluid can be reduced and it is effective in condensing the magnetic particles.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the configuration of a magnetic filter according to an embodiment of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a sectional view of the filter container portion, and Fig. 4 is a magnetic wire and conductive disk. Fig. 5 is an explanatory diagram of the magnetic flux shielding effect due to high-speed rotation of the conductive disk, and Fig. 6 is a configuration diagram showing the structure of a conventional magnetic filter. . In the figure, (1) is a filter container, (6) is a partition body, (
η is the first chamber, (8) the female second chamber, (9) is the magnetic wire, (lO) is the oscillator, (11) is the conductive disk, (13)
is a magnetic field generating means, which in this case is a magnetic pole. Note that the same reference numerals in each figure indicate the same or corresponding parts. Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 6

Claims (5)

[Claims] (1) Separated by a partition having multiple through holes,
A container forming a first and second chamber, a plurality of magnetic wires extending between the first chamber and the second chamber through the through hole of the partition, the first chamber and the second chamber. A magnetic field is generated that intersects these magnetic wires stretched over the magnetic wires, and a fluid containing magnetic particles flows into the first chamber, and the magnetic particles are captured by the magnetic wires while passing between the magnetic wires. means for attracting these magnetic particles from the first chamber to the second chamber along the magnetic line; and magnetic particle guiding means for reducing the magnetic field in the second chamber when the magnetic particles are separated from the magnetic line. A pair of conductive disks facing each other with a second chamber in between are rotated so that a cleaning fluid flows into the second chamber, and the magnetic particles are discharged from the second chamber together with the cleaning fluid. A magnetic filter comprising a detachment means. (2) The magnetic particle guiding means monotonically increases the magnetic field that intersects the plurality of magnetic lines from the first room to the second room so that the magnetic particles are attracted from the first room to the second room. A magnetic filter according to claim 1, which is a magnetic filter. (3) The magnetic particle guiding means is configured to move the magnetic particles from the first chamber to the second chamber so that the magnetic particles are attracted from the first chamber to the second chamber.
The magnetic filter according to claim 1, which generates a magnetic field that moves into a room. (4) The magnetic filter according to claim 2 or 3, wherein the magnetic particle guiding means imparts vibration to a plurality of magnetic lines. (5) A magnetic filter according to any one of claims 1 to 4, in which a plurality of magnetic wires are arranged in a mesh shape.