JPS6034335Y2 - magnetic filter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic filter that filters out solids from a liquid in which solids containing magnetic substances are dispersed.

This type of magnetic filter has a structure in which a filter layer made of a magnetic material is provided in a cylinder whose outer periphery is surrounded by a magnetized coil, and both ends of the filter layer are held between pole pieces made of perforated plates. be.

Conventionally, the pole piece in a magnetic filter has been a perforated plate made of a magnetic material such as soft iron.

The holes in the porous plate serve as passages for the liquid to be treated, and the non-pores serve as passages for three lines of magnetic force.

However, the holes and non-holes function only as parallel passages for the liquid to be treated and the lines of magnetic force, and therefore there is almost no leakage of the lines of magnetic force at the pole piece, and the magnetic substance in the liquid to be treated does not reach the pole piece. Since it is hardly magnetized, the pole piece has almost no magnetic filtration function, and naturally the magnetic filtration function of the magnetic filter exists only in the single layer of the filter.

As a result, in liquids to be treated in which solids are dispersed at a high concentration or liquids to be treated in which solids with large particle sizes are dispersed, the first layer of the filter tends to become clogged in a short period of time, and therefore the first layer of the filter needs to be washed and regenerated by filtration for a short period of time. was there.

The purpose of the present invention is to improve the above-mentioned conventional drawbacks and provide a filter function to the pole piece part to prevent further clogging of the filter. It is composed of a polymer of a plurality of perforated plates, and in the polymer, the holes of each perforated plate are stacked so as to communicate with each other, and in a set of perforated plates that are at least box-shaped, the holes and the holes are stacked so that they communicate with each other. The main idea is that the holes are overlapped so that the holes overlap with each other, the non-holes overlap with each other, and the holes overlap with the non-holes.

The present invention will be explained with reference to an embodiment shown in the drawings.

Figure 1 shows the entire magnetic filter, showing the cylindrical body 1.
A magnetizing coil 3 supported by a yoke 2 is surrounded on the outer periphery of the cylindrical body 1, and a filter layer 4 made of a packed layer of wire, wire mesh, etc. made of a magnetic material such as iron or stainless steel is arranged inside the cylindrical body 1. Both ends of the filter layer 4 are held between pole pieces 5 and 6.

The pole pieces 5 and 6 are made of perforated plates made of a magnetic material such as iron or stainless steel, and the pole piece 5 on the exit side, that is, the upper side in FIG. The lower pole piece 6 in FIG. 1 is made of a polymer of a plurality of perforated plates.

The porous plate 61 constituting the pole piece 6, that is, the polymer 6, has a diameter of 180 mm and a thickness of 91 rr, for example! As shown in Fig. 2, the IK disk-shaped magnetic iron plate has 2orrrIrL in the vertical and horizontal directions.
A square hole 6A is provided through a 9 mm non-hole 6B.

In order for the liquid to be processed to pass through, each porous plate 61 must have a hole 6A and a hole 6A in the mutually adjacent porous plates 61 and 61.
The holes 6A of each perforated plate 61 are
Needless to say, the perforated plates 61.6 must be stacked so that they communicate with each other, and at least a pair of perforated plates 61.
1, the hole portion 6A and the hole portion 6A overlap, and the non-hole portion 6
B and the non-hole portion 6B overlap, and the hole portion 6A and the non-hole portion 6B overlap.

To stack the perforated plates 61.61 in such a state, for example, rotate the center of the perforated plates 61.61 as shown in FIG. By rotation about the axis, they are shifted by 450 degrees.

Thus, the perforated plate 61 represented by the diagonal line on the upper right and the perforated plate 61 represented by the diagonal line on the upper left have an overlapping part A (blank part) between the hole parts 6A and the hole part 6A, and an overlap part A (blank part) between the non-perforated parts 6B and the non-perforated parts 6B. An overlapping portion (hatched portion) and an overlapping portion C (one hatched portion) between the hole portion 6A and the non-hole portion 6B are formed.

Part A is a passage for the liquid to be treated, and the opening of the part is a passage for lines of magnetic force; however, the lines of magnetic force leak into the part and magnetize the magnetic material in the liquid to be treated, and therefore the pole piece 6
Magnetic filtration will be performed at

In this example, the magnetic field supplied to the filter layer 4 is set to 4K.
If it is less than Oe, the magnetic flux density will be less than o,4wb7'i, and if the porous plate 61 is made of soft iron, the magnetic flux density that can pass through it will be about 1.6 Wb/d.

Therefore, the concentration of the pole piece 6 can be increased by four times or more.

Thus, if the proportion of the partial openings to the entire area of the perforated plate 61 is 25% or more, there will be no problem in the smooth passage of the lines of magnetic force.

Furthermore, when the liquid to be treated passes through the pole piece 61, the resistance of the passage can be ignored if the flow rate is 1 m/sec or less.

Usually, the flow rate of the liquid to be treated in the filter layer 4 is 0.1
The flow rate is approximately 4 m,/sec. Therefore, even if the flow rate is multiplied by 7, the flow rate becomes approximately 0.98 rrL/sec, and the resistance of the passage can be ignored.

Thus, the resistance of the passage can be ignored until the area of portion A is 177, that is, about 14% of the entire area of the porous plate 61, and there is no problem in the smooth passage of the liquid to be treated.

In this example, the perforated plates 61 and the perforated plates 61 were rotated by 45° and stacked four times.

In this case, the portion i is 2 with respect to the entire area of the perforated plate 61.
2.8%, partial mouth 29.5%, and partial mouth 47.
It becomes 7%.

As described above, the present invention has a structure in which a filter layer made of a magnetic material is provided in a cylinder whose outer periphery is surrounded by a magnetized coil, and both ends of the filter layer are held between pole pieces made of a perforated plate. The pole piece is made of a polymer of a plurality of perforated plates, and in the polymer, the holes of each perforated plate are stacked so that they communicate with each other, and at least one set of perforated plates that overlap each other has a plurality of holes. Since the parts are overlapped so that the parts overlap with the holes, the non-holes overlap with the non-holes, and the holes overlap with the non-holes, the overlapping parts of the holes are not treated. The overlapping area between the non-hole and non-hole areas becomes a path for the magnetic lines of force, but the lines of force leak at the overlap between the holes and the non-hole area, causing magnetization of the magnetic material in the liquid to be treated. As a result, the pole piece itself has a magnetic filtration function, and coarse filtration is performed in the pole piece, and fine filtration is performed in the first layer of the filter.With this two-stage filtration mechanism, the first layer of the filter has a magnetic filtration function. It is less likely to become clogged, and can be filtered for a long time even with liquids to be treated in which solids are dispersed at a high concentration or liquids to be treated in which large particle size solids are dispersed, and the frequency of cleaning and regeneration can be reduced.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side sectional view, Fig. 2 is a partial plan view of a perforated plate, and Fig. 3 is a partially transparent plane showing a set of perforated plates stacked one on top of the other. It is a diagram. In the figure, 1...Cylinder body, 3...Magnetizing coil, 4...Filter layer, 5.6...Pole piece, 61... ...Perforated plate, 6A...
・Hole, 6B...Non-hole, A...Overlapping part of hole and hole, Mouth...Overlapping part of non-hole and non-hole, H Overlapping part of hole and non-hole.

Claims (1)

[Scope of utility model registration request] In a structure in which a filter layer made of a magnetic material is provided in a cylinder whose outer periphery is surrounded by a magnetizing coil, and both ends of the filter layer are held between hole pieces made of perforated plates, the pole piece on the inlet side has a plurality of porous holes. It is made of a polymer of plates, and in the polymer, the holes of each perforated plate are overlapped so that they communicate, and in a pair of perforated plates that are at least box-shaped, the holes overlap. A magnetic filter characterized in that the magnetic filters are stacked so that non-porous portions and non-porous portions overlap, and pore portions and non-porous portions overlap.