JP2000254652A - Device for magnetic treating of water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the activation efficiency of water in a magnetic treating device of water based on a MHD electricity generation principle. SOLUTION: A plurality of permanent magnets 10a, 10b and 10c in which the N pole and the S pole of a permanent magnet 10 oppositely disposed across a city water pipe 12 disposed at the inside of a housing 2 and having a circular cross section are placed along the pipe and the direction of a magnetic pole is reversed alternately in the flow direction of the water generate the alternating magnetic field having 1000-3000 G magnetic flux peak value. The interval between the permanent magnets 10a, 10b and 10c are preferably 30-50 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic processing apparatus for water, and more particularly, to a magnetic processing apparatus for water in which a plurality of permanent magnets are arranged to increase generated current.

[0002]

2. Description of the Related Art Many magnetic treatment apparatuses have been proposed for applying magnetism to water flowing in a conduit to prevent scale adhesion or to activate water. By the way, MHD
(Magneto hydrodynamic power generation) In order to generate the electromotive force required for activation in water according to the principle, it is necessary to flow water in a direction perpendicular to the direction of the magnetic field,
It is necessary to arrange a water pipe or the like between the north pole of the magnet and the south pole of another magnet.

[0003] For example, Japanese Patent Application Laid-Open No. 9-308888 proposes a magnetic water treatment apparatus constructed under the above-mentioned principle. In this proposal, a yoke body is provided outside a permanent magnet and a circular conduit. To concentrate the magnetic flux on the water pipe. In this publication, the magnetic pole of the upper magnet among the permanent magnets arranged in the length direction of the water pipe is S, S,
Since it has the same polarity as S, a DC magnetic field is generated. Similarly, Japanese Patent Laid-Open No. 9-57273 discloses a water magnetic treatment apparatus in which a plurality of permanent magnets are arranged so that the direction of a magnetic field is constant.
Has been proposed in Japanese Patent Publication No. As a magnetic treatment apparatus for water in which the direction of the magnetic field changes by 180 ° in the length direction of the conduit, there is a device described in Japanese Utility Model Registration No. 3043069, but in this device, the profile of the magnetic field is not described. No description is given as to how the wave substance disposed outside the permanent magnet affects the electromotive force generated by the MHD.

[0004]

In the conventional proposal of a magnetic treatment apparatus for water, there is a method in which the magnetic treatment effect is quantitatively measured as disclosed in Japanese Patent Application Laid-Open No. Hei 10-118658. And this publication is not directly
D Electromotive force or generated current is not measured. Even if the magnetic circuit is devised without performing this measurement, the degree of activation of water by the conventional hydromagnetic treatment apparatus is insufficient from the viewpoint that the effect of improvement is naturally limited. I can't get it.

[0005]

In the magnetic water treatment apparatus according to the present invention, the north pole and the south pole of the permanent magnets disposed inside the housing and opposed to each other across a water pipe having a circular cross section are opposed to each other. And a plurality of permanent magnets arranged such that the directions of the magnetic poles are reversed in the flow direction of the water generate an alternating magnetic field in which the peak value of the magnetic flux density generated in the water pipe is 1000 to 3000 G. Things. Hereinafter, the present invention will be described in detail.

The magnetic treatment apparatus for water of the present invention employs a so-called different pole arrangement in which the magnetic poles of a pair of permanent magnets arranged with a water pipe interposed between the north pole and the south pole are further arranged as shown in FIG. H ₁ magnetic field direction in the water pipe is in the first wave to the second wave of H ₂
At 180 °. Furthermore, under an alternating magnetic field,
The polarization voltage of the second wave is lower than the polarization voltage of the first wave (|
Vp ₍₁₎ |> | Vp ₍₂₎ |). The same applies to the second wave and the third wave, so that the MHD generation current gradually increases to the second wave and the third wave. The polarization voltage was measured by measuring a voltage-current characteristic curve. FIG. 2 shows the results of measuring the MHD current flowing in water to which an AC magnetic field and a unidirectional magnetic field were applied using the apparatus shown in FIG. FIG. 3 shows only one pair of the plurality of permanent magnets. In the figure, 30 is a permanent magnet,
31 is a conduit and 34 is an electrode. As is clear from FIG. 2, a critical value is observed at a flow velocity of 40 cm / sec in a unidirectional magnetic field, but such a critical value is not remarkable in an alternating magnetic field, and the generated current in magnetized water is unidirectional at the same flow velocity. Significantly higher than that of the magnetic field.

As described above, in order to achieve the effect of reducing the polarization voltage, not only a plurality of permanent magnets are arranged, but also, for example, as shown in FIG. It is necessary to use an alternating magnetic field that increases and decreases. FIG. 4 shows two permanent magnets (length: 40 mm in the water flow direction) arranged with a vinyl chloride tube having a diameter of 20 mm interposed therebetween.
Is a graph in which the magnetic flux density generated is measured, the magnetic flux density does not stagnate at a constant value, and the two curves are continuous. On the other hand, if the magnet interval is too wide, a section where the magnetic flux density is zero appears not in the alternating magnetic field but in the magnetic field in the opposite direction, so that the above-described polarization voltage reduction cannot be used. On the other hand, if the magnet spacing is too close, the direction of the magnetic field generated between the adjacent magnets is parallel to the flow of water, so that not only does not generate the MHD electromotive force but also the AC magnetic field is disturbed. To avoid such undesired magnet arrangements, use magnetic field analysis software (Maxwell, 2D Field Simula
tor (ANSOFT) can be used. Furthermore, whether the peak value of the magnetic flux density in the water pipe is less than 1000G,
Or, if it exceeds 3000 G, the effect of increasing the current is small. More preferably, it is 1500-2000G.

[0008]

FIG. 5 shows a method of flowing water through a water pipe without a magnetic field and a method of flowing water through a water pipe in which a DC magnetic field or an AC magnetic field of 2 kOe is applied to water. The results of measuring the degree of magnetic activation (relative ratio, no unit) in (1, 2, 3) are shown. As can be seen from this figure, the activation degree of the AC magnetic field treated water is increased to about three times the DC magnetic field. Hereinafter, the present invention will be described more specifically with reference to examples.

[0009]

FIG. 6 is a perspective view showing the external appearance of a magnetic treatment apparatus for water used by being attached to the middle of a water pipe 1. As shown in FIG. The housing body 2 containing a permanent magnet such as a ferrite magnet is constructed by assembling an aluminum extruded material as a concave box, and its both ends are closed by injection molded ABS resin side covers 3a, 3b and bolts 4. ing. A water pipe piece having a circular cross section (not shown) is inserted into the upper concave portion of the housing body 2 from above to fix the position, and the rubber ring 5 is used to fix the water pipe 1a from the main pipe and the water pipe 1b to the house. And liquid-tight connection. At the upper part of the housing body, an upper cover 6 is fixed with four bolts 8 via a shield iron plate 7 for preventing magnetic leakage, and at the same time, a rubber tip is provided via a semicircular edge 6b ₍₁₎ of the lower end extension. It is also pressed against the ring 5. The upper cover 6 is composed of a main body 6a made of extruded aluminum material and both sides 6b made of ABS resin, and the latter is fixed to the former by bolts 8. Further, since the domestic water pipe usually has an inner diameter of 20 mm, the above water pipe piece having the same inner diameter is used so that the flow velocity does not change.

FIG. 7 is a plan view of the magnetic processing apparatus of FIG. 6, in which three pairs of permanent magnets 10a, 10b,
1 indicates that the water pipe pieces are arranged so as to sandwich them. The interval between the permanent magnets 10a, 10b, 10c is preferably 30 to 50 mm. FIG. 8 is a partial cross-sectional view of the inside of the main body, and a pair of permanent magnets 10a ₍ water pipes) (water pipes in a magnetic processing apparatus) 12 supported by a U-shaped pipe holder 13 made of a non-magnetic material are sandwiched therebetween. ₁₎ and 10a ₍₂₎ are opposed. 14 is the pipe holder 1
3 is a grooved block to which the shield iron plate 3 is fixed. A shield iron plate 15 fixed to the groove is provided on both sides to prevent magnetic leakage.

[0011]

As described above, according to the present invention, M
Since the HD generation current can be greatly increased, the effect of activating water and preventing scale is drastically increased.

[Brief description of the drawings]

FIG. 1 is a graph showing the direction of a polarization voltage in an alternating magnetic field.

FIG. 2 is a graph showing generated currents in an alternating magnetic field and a unidirectional magnetic field in relation to the flow rate of water.

FIG. 3 is an explanatory diagram of a method for measuring an MHD generation current.

FIG. 4 is a diagram showing an example of an alternating magnetic field and showing a measurement result of a magnetic flux density in a water pipe.

FIG. 5 is a diagram comparing the effects of activating water in the absence of a magnetic field, in an alternating magnetic field, and in a unidirectional magnetic field.

FIG. 6 is a drawing showing the appearance of a magnetic water treatment apparatus according to the present invention.

FIG. 7 is a plan view of FIG. 6;

FIG. 8 is a sectional view of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water pipe 2 Housing main body 3 Side cover 4 Bolt 5 Rubber ring 6 Upper cover 8 Bolt 10 Permanent magnet 12 Water pipe piece

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[Procedure amendment]

[Submission date] March 12, 1999 (1999.3.1.
2)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 7

[Correction method] Change

[Correction contents]

FIG. 7

Claims (1)

[Claims] 1. A permanent magnet disposed inside a housing, the N pole and the S pole of a permanent magnet facing each other across a circular water pipe are opposed to each other, and the directions of the magnetic poles are reversed in the flow direction of water. Wherein a plurality of permanent magnets are arranged to generate an alternating magnetic field having a peak magnetic flux density of 1,000 to 3,000 G in the water pipe.