JPS6344403B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a magnetic filter that continuously separates and removes minute magnetic particles mixed in a fluid using magnetic force.

[Conventional technology]

FIG. 4 is a block diagram showing the structure of a conventional magnetic filter. In the figure, reference numeral 1 denotes an annular excitation coil, which is arranged inside a return frame 2 that serves as a return path for magnetic flux, and a filter container 3 is attached to the central part. A filter element 4 made of a plurality of magnetic wires is mounted inside the filter container 3. The filter container 3 has a fluid pipe 5 and an outflow pipe 6.
The fluid pipe 5 is connected to a wash water outflow pipe 7, and the outflow pipe 6 is connected to a wash water inflow pipe 8, and valves V ₅ , V ₆ , V ₇ , and V ₈ are attached to each pipe. ing. Note that arrows indicate fluid flow. The same shall apply hereinafter.

Next, the effect will be explained. In FIG. 4, when the excitation coil 1 is energized, a magnetic flux is generated parallel to the liquid flow direction in the filter container 3, and the filter element 4
The magnetic wires constituting the filter are magnetized and create a strong magnetic field gradient around them, forming a so-called high-gradient magnetic filter. If a liquid containing magnetic particles is supplied through the inflow pipe 5 in this state, the magnetic particles contained in the liquid will be captured by the magnetic wires while passing through the filter element 4, and the liquid from which the magnetic particles have been separated will flow through the outflow pipe. 6 and then discharged. At this time, only valves V ₅ and V ₆ are open, and valves V ₇ and V ₈ are closed.

Since the magnetic particles accumulate on the filter element 4, 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, the valves V ₅ and V ₆ are closed, and the valves V ₇ and V ₈ are opened to supply cleaning water through the cleaning water inflow path 8 and deposit it on the filter element 4. The removed magnetic particles are removed and discharged from the wash water outflow pipe 7 to regenerate the filter, and the valves V ₅ and V ₆ are opened again, and the valves V ₇ and V ₈ are closed 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, it is necessary to remove the magnetic particles deposited on the filter element 4 by cutting off the current in the excitation coil 1, opening and closing the valve, and cleaning the filter with a cleaning liquid. Must. In other words, it is not possible to continuously separate and remove a liquid containing magnetic particles. Particularly when the particle concentration of the liquid containing magnetic particles is high, this occurs frequently, 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 obtain a magnetic filter that continuously separates and removes magnetic particles from a fluid containing magnetic particles.

[Means to solve the problem]

In the magnetic filter according to the present invention, a container is separated by a partition body having a plurality of through holes to form a first and a second chamber, and a plurality of magnetic wires are passed through the through holes of the partition body to form a first and second chamber. Stretched between the first room and the second room,
A magnetic field that intersects these magnetic lines is generated to capture the magnetic particles to the magnetic lines, and the captured magnetic particles are transferred to the first
When the magnetic particles are guided from the second room to the second room and separated from the magnetic wire, the magnetic field in the second room is reduced and a cleaning fluid is flowed into the second room to separate the magnetic particles from the magnetic wire. It is to be discharged.

[Effect]

In this invention, the magnetic particles captured by the magnetic wire are guided from the first chamber to the second chamber, and when the magnetic particles are separated from the magnetic wire, the magnetic field in the second chamber is reduced and the magnetic particles are guided to the second chamber. Since the cleaning fluid is caused to flow into the room and the magnetic particles are separated from the magnetic wires and discharged, the magnetic particles can be continuously and effectively separated and removed from the fluid containing the magnetic particles.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the construction of an embodiment of the present invention, in which the magnetic field generating means is shown by phase lines. FIG. 2 is a sectional view of a portion of the filter container 10 of another embodiment.
In FIGS. 1 and 2, 10 is a filter container made of a non-magnetic material. 11 is an inflow pipe for liquid containing magnetic particles, 12 is an outflow pipe for purified liquid from which magnetic particles have been removed, 13 is a supply pipe for washing water, and 14 is a drain pipe for separated magnetic particles and washing water. . 19 is a partition having a plurality of through holes;
A liquid containing magnetic particles flows into the filter 10,
It is divided into a first chamber 17 that traps magnetic particles and a second chamber 18 that releases the trapped magnetic particles. 20 is a plurality of magnetic wires that pass through the through holes of the partition body and are fixed at both ends to the filter container so as to be parallel to each other; 15 is a filter container for vibrating the liquid and magnetic wires in the filter container 10; A vibrator 16 attached to the second chamber 10 generates a second vibration when the cleaning water passes through the second chamber 18.
A ferromagnetic block 9 is connected to the magnetic wire 20 in the second chamber so as to reduce the magnetic field in the second chamber 18, and 9 is a pair of magnetic poles facing each other with a filter container interposed therebetween, so that a plurality of magnetic fields are generated. The two magnetic poles are arranged to face each other so that the distance between the two magnetic poles gradually becomes shorter so that the magnetic field strength monotonically increases from the first room to the second room. In addition,
Monotonically increasing means that the slope of the magnetic field strength is positive or zero.

In the magnetic gap formed with the magnetic poles 9 facing each other, the magnetic field generated in the Z-axis direction has a gradient distribution in which the strength increases in the X-axis direction. The magnetic wire 2 inside the filter container 10 in this magnetic gap
0 is magnetized.

The liquid to be purified, which has entered through the inlet pipe 11, passes between the magnetic wires 20. 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 particles are captured by the magnetic wires 20. The captured magnetic particles repeatedly attach to and separate from the magnetic wires due to the flow of the liquid, but in order to ensure this repetition, the magnetic particles 20 vibrate forcibly. On the other hand, since the magnetic force in the X-axis direction acts on the magnetic particles due to the magnetic gradient increasing in the X-axis direction, the magnetic particles that are repeatedly attached to and separated from the magnetic wire 20 are transported in the X-axis direction on the magnetic wire 20. It passes through the through hole of the partition 19 and is guided to the second room 18.

In the second chamber 18, a ferromagnetic block 16 is periodically brought close to the magnetic wire 20 within the second chamber 18 so as to periodically reduce the magnetic field within this chamber. As a result, the magnetic attraction force that had captured the magnetic particles in the magnetic wire 20 is periodically reduced, and in synchronization with this, by flowing cleaning water into the second chamber 18, the magnetic particles are removed from the magnetic wire 20. It is easily separated and drained through the drain pipe 14. On the other hand,
The liquid that has passed between the magnetic lines 20 and from which magnetic particles have been removed flows out through the outflow pipe 12.

FIG. 3 is a magnetic field strength distribution diagram showing the relationship between the position of magnetic lines and magnetic gradient. When magnetic particles captured by magnetic wires are guided from the first room to the second room, the distribution of the magnetic field strength H ₀ becomes curve A, which increases monotonically from the first room to the second room. On the other hand, when the magnetic particles induced in the second chamber are to be separated from the magnetic wires, the ferromagnetic block 16 is brought close to the plurality of magnetic wires in the second chamber and absorbs the magnetic flux in the second chamber. As a result, the distribution of the magnetic field strength H ₀ decreases in the second room as shown by curve B.
Along with this, the cleaning water is circulated to the second chamber to separate the magnetic particles in the second chamber from the magnetic wires and discharge them. After that, the ferromagnetic block 16 is moved away from the plurality of magnetic lines in the second room to increase the magnetic field strength.
Return the distribution of H ₀ to curve A again. This process is repeated to guide and separate the magnetic particles.

In addition, in the above embodiment, a rectangular parallelepiped filter container is divided into two chambers by a partition, but an annular first chamber and an annular second chamber are provided, and a plurality of filter containers are provided in the cylindrical partition between both chambers. A magnetic wire is fixed in the radial direction through the hole, and a magnetic field is formed in the direction of the central axis, and the magnetic flux distribution is configured so that the intensity has a gradient in the radial direction. is rotated to periodically reduce the magnetic field in the annular second chamber, and in synchronization with this, the cleaning water flows into the second chamber where the magnetic field has become smaller. The same effect as in the above embodiment can be obtained.

In the above embodiment, as the magnetic particle guiding means, vibration of a magnetic line by a vibrator and a magnetic gradient that increases monotonically in the The particles are moved from the first chamber to the second chamber by strong vibration in the direction of the inertial force.
You may move them to another room. Furthermore, since part of the liquid to be purified flows in the X-axis direction through the through-hole of the partition body 19, even if the fluid resistance force is used in conjunction with vibration or magnetic gradient, the same effect as in the above example can be obtained. play.

In the above embodiment, the magnetic particle separating means used to reduce the magnetic field in the second chamber by periodically bringing the ferromagnetic block closer to the magnetic wire in the second chamber. It may also be one that periodically blocks the magnetic field in a portion of the room.

In the above embodiment, X
Although a monotonically increasing magnetic gradient in the axial direction is used, the magnetic field may be moved from the first chamber to the second chamber so that the magnetic particles are attracted from the first chamber to the second chamber.

In the above embodiment, the magnetic wires pass through the through-holes of the partition and are fixed at both ends to the filter container so that they are parallel to each other. But that's fine.

In the above embodiment, a liquid containing magnetic particles passed through the magnetic filter, but a gas containing magnetic particles may also be used.

In the above embodiment, the cleaning fluid was caused to flow into the second chamber in synchronization with the periodic approach of the ferromagnetic block to the plurality of magnetic lines within the second chamber.
It may be allowed to constantly flow in regardless of the movement of the ferromagnetic block.

[Effects of the Invention] As described above, the present invention has the effect that magnetic particles can be continuously separated from a fluid containing magnetic particles, and the operating rate of the filter is higher than that of the conventional filter.

Note that if the magnetic field in the second chamber is periodically reduced and the cleaning fluid flows into the second chamber in synchronization with this, the amount of cleaning fluid can be reduced and the magnetic particles can be removed. Effective for condensation.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the structure of a magnetic filter according to an embodiment of the present invention, Fig. 2 is a sectional view of a filter container according to another embodiment of the invention, and Fig. 3 shows the relationship between the position of magnetic lines and the magnetic gradient. Magnetic intensity distribution diagram shown, No. 4
The figure is a configuration diagram showing the structure of a conventional magnetic filter. In the figure, 9 is a magnetic field generating means, in this case a magnetic pole, 10 is a container, 15 is a vibrator, 16 is a magnetic particle separation means, in this case a ferromagnetic block, 17
is a first room, 18 is a second room, 19 is a partition, and 20 is a magnetic wire. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] 1. Separated by a partition having a plurality of 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 that intersects these magnetic wires stretched between them is generated, 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 the captured magnetic particles to a second chamber along the magnetic line;
A magnetic filter comprising a magnetic particle separating means for causing a cleaning fluid to flow into a second chamber and discharging the cleaning fluid together with the cleaning fluid from a second chamber. 2. The magnetic particle guiding means monotonically increases the magnetic field crossing 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. 3. The magnetic particle guiding means generates a magnetic field that moves from the first chamber to the second chamber so that the magnetic particles are attracted from the first chamber to the second chamber. Magnetic filter described. 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. Any one of claims 1 to 4, wherein the magnetic particle separating means that reduces the magnetic field in the second chamber brings the ferromagnetic block closer to the plurality of magnetic lines in the second chamber. Magnetic filter described in Crab. 6. The magnetic filter according to any one of claims 1 to 4, wherein the magnetic particle separating means that reduces the magnetic field in the second chamber blocks the magnetic field in the second chamber. 7. The magnetic filter according to any one of claims 1 to 6, in which a plurality of magnetic wires are arranged in a mesh shape.