JPS6241772B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic filter that uses magnetic force to separate and remove minute ferromagnetic or paramagnetic particles mixed in a fluid.

[Prior art]

FIG. 1 is a block diagram showing the structure of a conventional magnetic filter.

In the figure, reference numeral 1 denotes an annular excitation coil disposed inside a yoke 2, and a filter container 3 is attached to the center portion. A filter element 4 made of a thin ferromagnetic wire is mounted inside the filter container 3. In addition, the filter container 3 has an inflow pipe 5.
The inflow 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. Each pipe has valves V ₅ , V ₆ , V ₇ , and V _{8 .} is attached.

Next, the effect will be explained. In FIG. 1, when the excitation coil 1 is energized, a magnetic flux is generated parallel to the direction of liquid flow in the filter container 3, forming a filter element 4. The magnetic wire is magnetized and forms a strong magnetic field gradient around it, 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 fine particles contained in the liquid will be captured by the magnetic wires while passing through the magnetic filter section, 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 V ₇ and V ₈ are closed.

Since the magnetic fine 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, valves V ₅ and V ₆ are closed, and valves V ₇ and V _{8 are} closed.
and supply washing water through the washing water inflow pipe 8.
The magnetic particles accumulated in the filter element 3 are removed, the filter is regenerated, the valves V ₅ and V ₆ are opened again, and the valves V ₇ and V ₈ are closed to supply a liquid containing magnetic particles.

The above cycle is repeated to separate the magnetic particles.

Conventional magnetic filters are constructed as described above, so in order to remove the magnetic particles accumulated in the filter element, the current of the excitation coil must be cut off, the valve should be opened and closed, and the filter should be washed with a washing liquid. There must be. In particular, when the concentration of particles in the liquid containing magnetic particles is high, this occurs frequently, resulting in drawbacks such as a decrease in the operating rate of the filter.

[Summary of the invention]

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and the container is separated by a partition having a plurality of through holes to form a first and second chamber, and a magnetic thin wire is inserted into the second chamber. 1, inserted into the through hole of the partition body, generates a magnetic field that intersects these magnetic thin wires, and is equipped with a means for capturing magnetic particles, a means for guiding magnetic particles, and a means for separating magnetic particles. It is an object of the present invention to provide a magnetic filter that can continuously separate a fluid containing particles into a fluid containing magnetic particles and a fluid containing no magnetic particles.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is a sectional view of the filter container 10. In FIGS. 2 and 3, 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 that does not contain magnetic particles, and 13 is a discharge pipe from which separated magnetic particles and a part of the liquid containing magnetic particles are discharged. . 17, a filter container, a first chamber 15 into which a fluid containing magnetic particles flows and captures the magnetic particles;
Second chamber 16 for releasing captured magnetic particles
a partition body having a through-hole 19, 18 passing through the through-hole 19 of the partition body, and having both ends fixed to the filter container so as to be parallel to each other;
14 is a vibrator attached to the filter container 10 in order to vibrate the liquid and the magnetic wire 18 in the filter container. 9 is tapered so that the generated magnetic field crosses multiple magnetic thin wires and increases monotonically (mathematically) toward the through hole of the partition, in this case forming a magnetic field distribution with a gradient. Opposed magnetic poles are arranged.

Note that arrows in the drawings indicate the flow of liquid.

In the magnetic gap formed by opposing the tapered magnetic poles 9, the magnetic field generated in the Z-axis direction has a gradient distribution such that its strength increases in the X-axis direction. Filter container 10 in this magnetic gap
The magnetic wire inside, that is, the ferromagnetic wire 18 is magnetized.

The liquid to be purified that has flowed in through the inflow pipe 11 passes between the ferromagnetic thin wires 18 . 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 ferromagnetic thin wire 18.

Vibrator 14 fixed to filter container 10
As a result, the ferromagnetic thin wire 18 vibrates, and the captured magnetic particles become attached to or separated from the ferromagnetic thin wire 18. On the other hand, a magnetic force in the X-axis direction acts on the magnetic particles due to the magnetic gradient increasing in the X-axis direction, so
It is conveyed in the axial direction and reaches the entrance of the hole in the partition body 17.

As shown in FIG. 4, since the magnetic field gradient in the X-axis direction is negative in the partition 17, a magnetic force in the negative direction of the X-axis acts on the magnetic particles. On the other hand, in the hole of the partition body 17, a part of the liquid to be purified flows in the X-axis direction, so that a fluid resistance force acts on the magnetic particles.
By making this fluid resistance force larger than the magnetic force in the negative direction of the X-axis, the magnetic particles move into the second chamber 16.
sent to.

In the second room 16, the strength of the magnetic field is small, so
The magnetic attraction force is small, and the magnetic particles easily separate from the magnetic wire 18, pass through the discharge pipe 13, and are discharged.
On the other hand, the liquid that has passed between the magnetic wires 18 and does not contain magnetic particles flows out through the outflow pipe 12.

In addition, in the above embodiment, a rectangular parallelepiped filter container is divided into two chambers by a partition plate, but a first annular chamber and a second annular chamber are provided, and a plurality of filter containers are provided in the cylindrical partitioning body of both chambers. A thin ferromagnetic wire is fixed in the radial direction through the hole, and a magnetic field is formed in the direction of the central axis, and its strength has a gradient in the radial direction, becoming suddenly smaller at the part of the partition cylinder. Become,
In the second room, the magnetic flux distribution may be configured to be sufficiently small, and the same effect as in the above embodiment can be achieved.

In the above example, magnetic poles arranged so as to have a magnetic field gradient are used as the magnetic particle guiding means. The particles may be moved toward the partition body 17 by force.

〔Effect of the invention〕

As described above, according to the present invention, magnetic particles can be continuously separated from a fluid containing magnetic particles, the operating rate of the filter is higher than that of conventional filters, and various equipment for cleaning the filter is not required. It has the effect of becoming.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a conventional magnetic filter, and FIG. 2 is a configuration diagram of a magnetic filter according to an embodiment of the present invention.
FIG. 3 is a sectional view of a filter container according to an embodiment of the present invention, and FIG. 4 is an explanatory diagram showing the relationship between the partition and the magnetic field strength distribution. 1...Excitation coil, 2...Yoke, 3...Filter container, 4...Filter element, 5...Inflow pipe, 6...Outflow pipe, 7...Washing water outflow pipe, 8...
Cleaning water inflow pipe, 9...magnetic pole, 10...filter container, 11...inflow pipe, 12...outflow pipe, 13...
Exhaust pipe, 14... vibrator, 15... first chamber,
16... Second room, 17... Partition body, 18...
Magnetic thin wire, 19...through hole.

Claims (1)

[Claims] 1. Separated by a partition having a plurality of through holes,
A container forming first and second chambers, a plurality of magnetic thin wires stretched in the first chamber and inserted into the through holes of the partition, generating a magnetic field that intersects these magnetic thin wires, and containing magnetic particles. Means for causing the fluid to flow into the first chamber and capturing magnetic particles by the magnetic thin wire while passing through the magnetic thin wire, and drawing the captured magnetic particles to the through hole of the partition body along the magnetic thin wire. A magnetic particle guiding means and a fluid resistance generated when the fluid in the first chamber passes through the through hole of the partition body to cause the magnetic particles to separate from the magnetic thin wire and move to the second chamber. Magnetic filter with particle separation means. 2. The magnetic filter according to claim 1, wherein the magnetic particle guiding means vibrates the magnetic thin wires and monotonically increases the magnetic field crossing the plurality of magnetic thin wires toward the through-hole of the partition. . 3 The magnetic thin wire passes through the through hole of the partition body and enters the first
3. A magnetic filter according to claim 1 or 2, which is placed between the first room and the second room.