JPS62149315A - Method and apparatus for magnetic type filtration used with multipolar magnet - Google Patents

Abstract

PURPOSE:To increase filtration efficiency by using a multipolar magnet as a permanent magnet to control the magnetic flux distribution of the inside of a filter device and making the magnetic flux between the magnets dense. CONSTITUTION:A distribution state of magnetic flux in the inside of a filter device is controlled by using a multipolar magnet e.g. the magnets 8 magnetized to four poles in the order of N-S-N-S from the top in the permanent magnet. For example, when the multipolar magnets 8 are descended to a lower part by the rods 9 and transferred to the positions of the broken lines 12 or below, a filter medium 10 and solid content drop by gravity into a hopper 5 of the under part of a vessel 1 and are discharged to the underside through a valve 6. At a time of filtration, fluid contg. the filter medium 10 and the solid content is introduced through a feed port 7 and the filter medium 10 and the solid content are held and stuck on a perforated plate 4 and only fluid is discharged through the valve 6. As a result, the clogging is prevented and filtration efficiency can be increased by preventing a drift current or a channelling and preventing a short passing of the solid material and also by averaging adsorption of the solid material in the inside of the vessel 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a so-called magnetic filtration method and apparatus for magnetically adsorbing and collecting magnetic solids in a fluid.

[Conventional technology]

Figure 3 shows an example of a conventional magnetic filtration device using two-pole magnets. It is a perforated plate that holds lO and solids. Lower the dipole magnet 2 to the bottom with the rod 9,
When the container is moved to a position below the broken line 32, the furnace material lO and solids fall into the hopper 5 at the bottom of the container l due to gravity and are discharged below the valve 6. ? After 75 hours, a fluid containing the furnace material 1O and solids is introduced from the supply lower, the perforated plate 4J holds and adheres the garlic wood 1O and the solids, and only the fluid is discharged from the valve 6.

[Problems to be solved by the invention] In this case, the magnetic flux distribution is as shown in 31, the magnetic force on the side of the magnet is weak, and there is a lot of magnetic flux escaping to the upper side of the magnet. This has the disadvantage that the solid content is not collected in this part and the filtration efficiency cannot be improved. On the other hand, solid matter concentrates around the magnetic poles, resulting in high overresistance in these areas, causing so-called clogging, as well as drifting and channeling, which also reduce filtration efficiency.

It is an object of the present invention to provide a new method and device that improves the drawbacks of the prior art described above.

[Means for Solving the Problems] The magnetic filtration method, which is the first invention, is a magnetic filtration method in which magnetic solids contained in a fluid are attracted and collected by the magnetic flux of a permanent magnet. The present invention is characterized in that a magnet is used as the permanent magnet, which is integrally molded and has a magnetized material that is saturated and multipole magnetized all around.

A second invention, a magnetic filtration device, is a device for carrying out the first invention, and includes at least one non-magnetic tube protruding into a container, and a magnetic filtration device inserted into the non-magnetic tube. It is characterized by having a multipolar magnet that is circumferentially saturated magnetized.

The third invention, a magnetic magnetization device, is a device for carrying out the first invention, in which a non-magnetic tube is used as a container, and a multipolar magnet that is saturated magnetized all around the container is provided on the outer periphery of the container. It is characterized by this.

The multipolar magnet used in the present invention is disclosed in Japanese Patent Application Laid-Open No. 107809 and Japanese Patent Application No. 80-22 filed earlier by the present inventors.
It can be manufactured by the method of No. 1952. According to this method, the number of poles of the magnet, the magnetic strength of the poles, and the magnetic flux density distribution between the poles can be set to a desired pattern, and the total magnetic flux density can be increased and the coercive force maintained and strengthened.

[Function] In the multipolar magnet used in the present invention, N in the axial direction,
Since the S magnetic poles are formed singly and alternately to create an even magnetic flux distribution around the non-magnetic tube, it is possible to increase the effective filtration area and volume. Further, the shape and size of the solid matter to be adsorbed can be distributed according to the magnetic flux distribution.

Such an effect cannot be obtained simply by combining conventional dipole magnets. For example, when conventional two-pole magnets are combined and their magnetic poles are opposed to N-3 and N-3, most of the magnetic flux is concentrated at the shortest distance between the two opposing poles, and the magnetic flux on the side of the magnet is weak. becomes. On the other hand, when the magnetic poles are opposed to N-S and S-N, the magnetic flux density at the side faces increases, but the total magnetic flux density decreases, and the magnet demagnetizes, resulting in poor durability.

The main focus of the present invention is to control the magnetic flux distribution state inside the device by using a multipolar magnet in a magnetic filter device. Therefore, the scale and form of the filtration device, the number of magnets, their shape, arrangement, material, presence or absence of a filtration material, material, shape, arrangement, etc. should be appropriately selected depending on the purpose. It is not limited to the examples.

[Example] An example of the present invention is shown in FIG. 1. In FIG. 1, 1 is a container, 8 is a multipolar magnet arranged in parallel,
It is magnetized into four poles in the order of N-3. 3 is a non-magnetic tube, 4
is a perforated plate that holds the furnace material lO and solids.

In the above configuration, when the multipole magnet 8 is lowered by the rod 9 and moved to a position below the broken line 12, the furnace material lO and solids fall into the hopper 5 at the bottom of the container l due to gravity and are discharged below the valve. Ru. When passing through the RP, fluid containing the furnace material 10 and solids is introduced from the supply lower, the furnace material and solids are held and adhered to the perforated plate 4, and only the fluid is discharged from the valve 6.

The magnetic flux distribution in this example is as shown in 11 in the figure, and the magnetic flux on the side surfaces of the magnet is strong. Therefore, the magnetic flux escaping to the upper side of the magnet can be reduced. Furthermore, since the distribution of magnetic flux is averaged, it is possible to prevent the furnace material from becoming partially unbalanced.

FIG. 2 shows another embodiment of the invention. In this embodiment, a multipolar magnet 8 magnetized to a large pole is placed around the outer periphery of a capacitor 1, and a filtration layer is formed on the inner surface of a container 1 made of a non-magnetic material. In this case, the solid matter can be removed by moving the multipolar magnet 8 upward or downward, or by removing it.

In each of the above embodiments, an example was shown in which the magnetic material lO was used and the solid matter was collected by the furnace material layer, but the material layer was omitted and a magnet (or a non-magnetic material with a magnet inserted) was shown. Solid matter may be directly adsorbed onto the surface of the magnetic tube.

Alternatively, the magnet may be shaped like a flat plate, and the surface of the magnet may be used to attract solid matter.

[Effects of the Invention] As explained above, according to the present invention, multipolar magnets are used to control the magnetic flux distribution within the filtration device, and by making the magnetic flux between the magnets dense, it is possible to prevent drifting and channeling. be able to. In addition to preventing short passes of solids,
By averaging the adsorption of solids within the container, clogging can be prevented and the hyperactivity rate can be further improved. Figure 2 shows an apparatus showing another embodiment of the present invention. The block diagram, FIG. 3, is a block diagram of a conventional device.

■... Container, 3... Non-magnetic tube, 8... Multipolar magnet,
lO... or material.

Claims (1)

[Claims] 1) In a magnetic filtration method in which magnetic solids contained in a fluid are attracted and collected by the magnetic flux of a permanent magnet, the magnetized material formed integrally with the permanent magnet is entirely attached to the permanent magnet. A magnetic filtration method using a multipolar magnet characterized by using a magnet with circumferentially saturated multipolar magnets. 2) at least one non-magnetic tube protruding into the container;
A magnetic filtration device using a multipolar magnet, characterized in that the multipolar magnet is inserted into the non-magnetic tube and is saturated magnetized all around. 3) A magnetic filtration device using a multipolar magnet according to claim 2, wherein a magnetic filter medium is held on the outside of the non-magnetic tube. 4) A magnetic filtration device using a multipolar magnet, characterized in that a non-magnetic tube is used as a container, and a multipolar magnet whose entire circumference is saturated magnetized is provided around the outer periphery of the container. 5) A magnetic filtration device using a multipolar magnet according to claim 4, wherein a magnetic filter medium is held within the non-magnetic tube.