JPS58143856A - Filter for adsorbing magnetic material - Google Patents

Abstract

PURPOSE:To collect a magnetic material in good efficiency, by a method wherein plural passing orifices having magnetic elements are formed so as to traverse the flow passage of a dust containing gas containing the magnetic material and magnets are provided so as to hold each passing orifice therebetween. CONSTITUTION:In an apparatus main body 1 flowing a dust containing gas from the upper part toward the lower part, plural partition plates 2 having passing orifices 3 respectively opened therethrough are provided and cylindrical magnetic elements 4 comprising a magnetic material are attached to the parts of said passing orifices 3. In addition, a magnet 5 is provided to the external part of the apparatus main body 1 to magnetize the magnetic elements 4. Therefore, a magnetic material in a dust containing gas passing through each passing orifice 3 is adsorbed by each magnetic element 4. When a predetermined amount of the magnetic material is adsorbed, the supply of the dust containing gas into the apparatus main body 1 is stopped to detach the magnet 5 while purified air is sent thereinto from a lower gas exhaust port 1b and the magnetic material adsorbed by the demagnetized magnetic element 4 is separated and recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter that selectively adsorbs magnetic substances such as iron powder contained in dust particles.

When dust generated in factories etc. contains a large amount of magnetic materials such as iron powder, if the magnetic materials such as iron powder can be recovered from the dust, it can be effectively reused. By the way, in order to recover iron powder etc. from dust containing a mixture of magnetic and non-magnetic materials, a filter is required that separates both and captures only the magnetic materials.

An object of the present invention is to provide a magnetic substance adsorption filter suitable for meeting such requirements.

In the present invention, a large number of holes having magnetic elements are formed across the flow path of the supplied dust gas, and magnets are installed across the holes. The element is characterized in that it makes good contact with the element, reliably and effectively adsorbs and captures magnetic substances such as iron powder to the element, and easily recovers them.

An embodiment of the present invention will be described below with reference to the drawings. 1st
In Figure (a), a partition plate 2 is installed in the main body 1 of the device that causes the dust gas to flow from above to below, and the inside of the main body 1 is divided into an inlet la side and an outlet 1b side. compartmentalize, separate. 2. Then, the opening positions of the partition plates 2 in each stage are shifted by n, and a large number of through holes 3 are opened in n-5n-, and each Figure 1 (
Attach the cylindrical magnetic element 4 made of a magnetic material as shown in b) (see FIGS. 1(a) and 1(C)). Furthermore, a magnet 5 (permanent magnet or electromagnet) is installed outside the main body 1 to magnetize the magnetic element 4.

In the embodiment, the dust gas supplied into the main body l from the inlet 1a passes through each through hole 3, but since the magnetic gradient at the edge of the magnetic element 4 around the through hole 3 is large, the dust gas is The magnetic powder contained therein is attracted and captured by each of the magnetic elements 4. On the other hand, the dust gas from which the magnetic material has been removed is exhausted to the outside of the main body 1 through the exhaust port 1b.

FIGS. 2(a) and 2(b) show a second embodiment of the present invention. This embodiment is applied to a flow path in which dust gas that has flowed into the main body from above is reversed within the main body and then flows out upward. In other words, the interior of the main body 1 is divided into two chambers on the left and right by a partition plate 2, and an inlet 1a and an outlet 1b are opened in the upper part of each chamber.

A large number of through holes 3 formed in the partition plate 2...
Insert a cylindrical magnetic element 4 into the groove f,
A magnet 5 is installed outside the main body 1 facing the magnetic element 4. In this embodiment, the dust gas from the inflow port 1a is reversed within the main body 1, and each through hole 3 of the partition plate 2
When passing through the dust gas, the magnetic material in the dust gas is reliably attracted and captured by the magnetic element 4.

Figures 3 (a), (b), and (d) are examples in which a case containing a magnetic element is installed inside the main body. In other words, the case consists of a cylindrical body 6 with a bottom. A large number of through holes 7 are provided on the circumferential surface of the case, a mesh-like magnetic element 4 made of expanded metal of a magnetic material is attached inside the through holes 7, and the upper opening of this case is connected to the inflow side conduit of the waste. A magnet 5 is installed outside the main body facing the case.In this embodiment, the dust gas blown into the cylinder 6 from the upper opening toward the bottom 6a is passed through. From the hole 7 flows out into the range.Fl contained in the gas
The magnetic material is effectively adsorbed and captured by the mesh of the element 4.

FIGS. 4(a), (b), and (C) show a modification of the third embodiment.

In the third embodiment, a magnetic element made of expanded metal was attached to the inner surface of the cylinder 6, but in this embodiment, the projections were attached to the inner surface of the cylinder 6 around the through holes between the projections protruding radially inward. A strip of magnetic element 4 is attached. In this embodiment, the magnetic gradient at the tip of each element 4 is large, and the magnetic material in the dust gas can be effectively attracted to the tip of the magnetic element. To recover the fine magnetic material adsorbed by the element 4, the magnet 5 is removed from the main body 1, or the case is removed from the main body, and cleaning air is sent in from the direction opposite to the inflow direction of the dust gas. Since the element 4 is demagnetized by removing the magnet 5, the magnetic material adhering to the element 4 is easily separated from the element and collected by this air flow. In particular, since the diameter of the through hole is small, the blown cleaning air flows out of the through hole at high speed and can be efficiently recovered by the air pressure.

As described above, the present invention allows dust particles containing a magnetic material such as iron powder to flow through a through hole equipped with a magnetized element. The magnetic material can be separated from the gas by contacting with the magnetic material element of the gas, and the magnetic material can be reliably and effectively adsorbed and captured, and the element is demagnetized and recovered with cleaning air blown into the through hole. It is easy to collect, does not require rough sorting work after collection, and has the effect of being able to be reused effectively.

[Brief explanation of the drawing]

FIG. 1(a) is a configuration diagram showing a first embodiment of the present invention.
Figure (b) is a perspective view of the magnetic element, Figure 1 (e) is a sectional view showing how the magnetic element is installed, Figure 2 (a)
is a configuration diagram showing the second embodiment, FIG. 2(b) is a sectional view showing the installation state of the magnetic element, FIG. 3(a) is a configuration diagram showing the third embodiment, and FIG. 3(b) 3(C) is a cross-sectional view of the cylindrical body, FIG. 3(d) is an enlarged view of the magnetic element, and FIG. 4(a) is a configuration diagram showing the fourth embodiment. , FIG. 4(b) is a longitudinal cross-sectional view of the cylinder, and FIG. 4(e) is a cross-sectional view of the cylinder. 2...Partition plate, 3...Through hole, 4...
...Magnetic element, 5...Magnet, 6...
...Cylinder, 7...Through hole. 7- Figure 1 (of) Figure 3 Figure 4 i

Claims (1)

[Claims] A magnetic substance adsorption filter characterized in that a large number of holes having magnetic elements are formed across a flow path of dust gas containing a magnetic substance, and magnets are installed across the holes.