JP2023149672A - Magnetic separation device and magnetic separation method - Google Patents

Abstract

To provide a magnetic separation device which magnetically separates solid content in processing-target liquid, is operated and maintained with a little time and effort and has high separation efficiency, and a magnetic separation method for magnetically separating the solid content in the processing-target liquid and having high separation efficiency.SOLUTION: A magnetic separation device is provided, comprising: a separation unit constituted of double pipe structure having an inner cylinder and an outer cylinder; and a magnetic field generation unit disposed outside the separation unit and generating a magnetic field outside the inner cylinder, wherein the separation unit is supplied with processing-target liquid from the one end of the inner cylinder and has a flow straightening member on the other end portion of the inner cylinder. A magnetic separation method using the above magnetic separation device is also provided.SELECTED DRAWING: Figure 1

Description

The present invention relates to a magnetic separation device and a magnetic separation method.

One of the means for treating a liquid to be treated containing solids is solid-liquid separation, which removes or recovers solids in the liquid to be treated.
Technologies related to solid-liquid separation include, for example, precipitation separation in which solids settle by gravity, coagulation-sedimentation separation in which a flocculant is used to promote separation by gravity, membrane filtration separation using a filter medium, and magnetic force. Examples include magnetic separation.
In particular, magnetic separation imparts magnetism to the solids in the liquid to be treated (magnetic support), and uses magnetic force to concentrate and recover the solids.It has higher separation efficiency than separation by gravity, and uses a filter medium. This has the advantage that the load associated with operation and maintenance is lower than that of conventional methods.

For example, Patent Document 1 describes a magnetic separation device including a drum-shaped separator that is disposed in a separation tank to which wastewater is supplied and that rotates to attract magnetic flocs in the wastewater by magnetic force. Furthermore, this separator is described as having a drum rotating body and a magnet group consisting of a large number of magnets arranged along the inner circumferential surface of the drum rotating body.

Japanese Patent Application Publication No. 2011-183271

When using a drum rotating body equipped with magnets, such as the magnetic separation device described in Patent Document 1, the magnetic field strength and magnetic field gradient on the drum surface are small, so the separation efficiency is low, and once separated, it is necessary to repeat the separation. need to be processed.

In addition, as another example of a magnetic separation device, one is known in which a magnetic field is applied from the outside to a filter filled with a magnetic medium, and magnetic solid matter is adsorbed onto the filter. When performing solid-liquid separation on a liquid to be treated, there are problems in that continuous operation is difficult and filters are easily clogged.

Furthermore, in the conventional magnetic separation apparatus described above, the means for applying a magnetic field to the liquid to be processed (e.g., a magnet or a filter filled with a magnetic medium, etc.) and its driving mechanism are in direct contact with the liquid to be processed. . For this reason, in the conventional magnetic separation device, the cost (load) for dealing with corrosion and failure increases as the device continues to operate.

Therefore, an object of the present invention is to provide a magnetic separation device and a magnetic separation method that have a low load on operation and maintenance and have high separation efficiency in magnetic separation in which solids in a liquid to be treated are separated by magnetic force. That's true.

As a result of intensive study on the above-mentioned problems, the present inventor has provided a magnetic field generating section that generates a magnetic field outside the separation section that supplies the liquid to be processed and performs solid-liquid separation, and By rectifying the direction of movement, it is possible to perform magnetic separation without contact between the means for applying a magnetic field and the liquid to be treated, reducing the load associated with operation and maintenance, and increasing separation efficiency. The present invention was completed by discovering that this is possible.
That is, the present invention provides the following magnetic separation apparatus and magnetic separation method.
In the present invention, the term "magnetic material" refers to a material that is strongly magnetized by a magnetic field and remains magnetized even when the magnetic field is removed, and refers to a so-called ferromagnetic material. Furthermore, "nonmagnetic material" refers to a material that is not ferromagnetic.

The magnetic separation device of the present invention for solving the above problems includes a separating section having a double tube structure having an inner tube and an outer tube, and a magnetic field that is placed outside the separating section and generates a magnetic field outside the inner tube. The separating section is characterized in that the liquid to be treated containing a magnetic substance is supplied from one end of the inner cylinder, and has a rectifying member at the other end of the inner cylinder.
According to the magnetic separation apparatus of the present invention, by providing a magnetic field generation section that generates a magnetic field outside the separation section that supplies the liquid to be treated and performs solid-liquid separation, the means for applying the magnetic field and the liquid to be treated can be separated. It becomes possible to perform magnetic separation in a non-contact state. This makes it possible to reduce the load associated with operation and maintenance. In addition, the separation part has a double pipe structure with an inner cylinder and an outer cylinder, and the liquid to be treated is supplied from one end of the inner cylinder and a rectifying member is provided at the other end, so that the liquid to be treated can move inside the inner cylinder. By reversing the moving direction of the liquid to be treated discharged from the inner cylinder to the outer cylinder side, it becomes possible to form a circulating flow within the separation section. Due to this circulating flow, the liquid to be treated repeatedly passes through the magnetic field generated by the magnetic field generator, so that it is possible to improve the magnetic separation efficiency.

Furthermore, an embodiment of the magnetic separation apparatus of the present invention is characterized in that the liquid to be treated also contains solid content made of non-magnetic material.
According to this feature, it becomes possible to perform magnetic separation (solid-liquid separation) on the solid content of the magnetic material and non-magnetic material in the liquid to be treated. This expands the range of objects that can be treated by the magnetic separation device of the present invention, and it becomes possible to perform solid-liquid separation with high separation efficiency even for solids made of non-magnetic materials.

Further, an embodiment of the magnetic separation device of the present invention is characterized in that the magnetic field generation section includes means for moving the magnetic field in a fixed direction.
According to this feature, by moving the magnetic field, it becomes easy to guide the magnetic material (and the solid content consisting of non-magnetic material) in the liquid to be treated in a certain direction. This makes it possible to further improve magnetic separation efficiency.

Further, in an embodiment of the magnetic separation device of the present invention, the separation section includes a first collection section that collects a processing liquid whose magnetic material content is lower than that of the liquid to be processed, and a first recovery section that collects a processing liquid whose magnetic substance content is lower than that of the liquid to be processed; The present invention is characterized in that it includes a second recovery section that recovers the processing liquid with increased body content.
According to this feature, while the liquid to be processed containing a magnetic substance is swirled to pass through a magnetic field in the separation section, a process liquid whose magnetic substance content decreases and a process liquid whose magnetic substance content increases are separated. It arises. Providing individual recovery sections for recovering these processing solutions makes it easy to appropriately handle each processing solution after collection.

In addition, the magnetic separation method of the present invention for solving the above problems includes a separation process using a double tube structure having an inner tube and an outer tube, and a magnetic field applied from the outside of the double tube structure to the outside of the inner tube. The separating step includes a step of supplying a liquid to be treated containing a magnetic substance from one end of the inner cylinder, and a rectifying member provided at the other end of the inner cylinder. The present invention is characterized in that it includes a rectifying step of reversing the moving direction of the liquid to be treated inside the inner cylinder and the moving direction of the liquid to be treated outside the inner cylinder.
According to the magnetic separation method of the present invention, by performing the magnetic field generation step of generating a magnetic field from the outside of the double tube structure in which the separation step is performed, the magnetic field is generated while the means for applying the magnetic field and the liquid to be processed are not in contact with each other. It becomes possible to perform separation. This makes it possible to reduce the load associated with operation and maintenance. In addition, the separation process is performed using a double pipe structure with an inner tube and an outer tube, and by supplying the liquid to be treated from one end of the inner tube and providing a rectifying member at the other end, the liquid to be treated inside the inner tube is By reversing the moving direction of the liquid and the moving direction of the treated liquid discharged from the inner cylinder to the outer cylinder side, it is possible to form a circulation flow within the double pipe structure in the separation process. Due to this circulating flow, the liquid to be treated repeatedly passes through the magnetic field generated by the magnetic field generation step, making it possible to increase the magnetic separation efficiency.

According to the present invention, it is possible to provide a magnetic separation device and a magnetic separation method that require less load on operation and maintenance and have high separation efficiency in magnetic separation in which solids in a liquid to be treated are separated by magnetic force. can.

FIG. 1 is a schematic explanatory diagram showing a magnetic separation device according to a first embodiment of the present invention. FIG. 3 is a schematic explanatory diagram showing another aspect of the separation section in the magnetic separation device according to the first embodiment of the present invention. FIG. 2 is a schematic explanatory diagram showing a magnetic separation device according to a second embodiment of the present invention. FIG. 2 is a schematic explanatory diagram showing a magnetic separation device according to a second embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a magnetic separation apparatus and a magnetic separation method according to the present invention will be described in detail with reference to the drawings. Note that the magnetic separation apparatus described in the embodiments is merely exemplified to explain the magnetic separation apparatus according to the present invention, and the present invention is not limited thereto. Further, the magnetic separation method described in this embodiment is merely exemplified to explain the magnetic separation method using the magnetic separation apparatus according to the present invention, and is not limited thereto.

[First embodiment]
FIG. 1 is a schematic explanatory diagram showing the structure of a magnetic separation device according to a first embodiment of the present invention.
A magnetic separation device 10A according to this embodiment includes a separation section 20 and a magnetic field generation section 30A, as shown in FIG. Furthermore, the separation unit 20 includes a line L1 that is a liquid to be treated supplying unit that supplies the liquid to be treated W0 containing a magnetic substance.
Note that each arrow in FIG. 1 indicates the direction of movement of the fluid or magnetic field.

The separation unit 20 is supplied with a liquid to be processed W0 containing a magnetic substance (hereinafter also simply referred to as “liquid to be processed W0”), and is configured to perform solid-liquid separation (magnetic separation) using magnetic force on the liquid to be processed W0. It is something.
Furthermore, as shown in FIG. 1, the separating section 20 in this embodiment has a double tube structure having an inner tube 21 and an outer tube 22. , a circulating flow of the liquid to be treated W0 is formed.

The liquid to be processed W0 supplied to the separation unit 20 in this embodiment is not particularly limited, as long as it is a solution to be processed in solid-liquid separation and contains a magnetic material.
For example, the liquid to be processed W0 in this embodiment includes a solution containing a magnetic substance to be separated. A specific example of such a liquid to be treated W0 is a coolant liquid (used coolant liquid) that becomes a solution containing magnetic metal pieces or metal powder when used for machine tools or power mechanisms. It will be done.
Further, another example of the liquid to be processed W0 in this embodiment is a solution that contains a solid content to be separated and has a magnetic substance added thereto to make the solid content magnetized. Here, the solid content supported by a magnetic material is a solid content made of a non-magnetic material, and refers to a solid content that is to be removed or recovered from a solution by solid-liquid separation. Examples of solutions containing solids include river water, wastewater, and sewage that contain suspended solids to be removed, as well as treated water after biological treatment that contains microorganisms to be recovered. The magnetic material added to the solution containing solids may be any material that can impart magnetism to the solids, including magnetic metal particles such as magnetite particles and iron powder, as well as magnetic materials added to the resin. Examples include carriers kneaded with. The size of the magnetic material to be added is not particularly limited, but should be approximately 0.1 μm to 10 cm in consideration of ease of handling, magnetization efficiency (contact (adsorption) efficiency with solid content), etc. This can be mentioned.

Hereinafter, a specific example of the structure of the separating section 20 in this embodiment will be described based on FIG. 1.
As shown in FIG. 1, the separating section 20 in this embodiment has an inner cylinder 21 and an outer cylinder 22, and has a part to be treated with respect to one end of the inner cylinder 21 (the upper end side of the inner cylinder 21 in FIG. 1). A flow regulating member 23 having a flow regulating surface 23a is provided on the other end side of the inner cylinder 21 (in FIG. 1, the lower end side of the inner cylinder 21) to which the liquid supply section (line L1) is connected.
Further, in the upper part of the separation unit 20, a first recovery unit 24 is provided for recovering the processing liquid W1 (hereinafter also simply referred to as “processing liquid W1”) whose magnetic substance content is lower than that of the liquid to be processed W0. A second recovery section 25 is provided below the separation section 20 to recover the processing liquid W2 (hereinafter also simply referred to as "processing liquid W2") having a higher magnetic substance content than the processing liquid W0.

The inner cylinder 21 is supplied with the liquid to be processed W0 via the liquid to be processed supply section (line L1), and may be made of a tubular member with both ends open.
The specific material and shape of the inner cylinder 21 are not particularly limited. For example, as shown in FIG. 1, an example of the shape of the inner cylinder 21 is such that the end connected to the liquid to be treated supply section (the upper end of the inner cylinder 21 in FIG. 1) is inclined toward the outer circumference. There are many things you can do. As will be described later, the liquid to be treated W0 supplied from the upper end of the inner cylinder 21 forms a circulating flow and returns to the upper end of the inner cylinder 21 again. At this time, since the end of the inner cylinder 21 has a shape inclined toward the outer circumferential side, the liquid to be treated W0 that has moved inside the outer cylinder 22 can easily enter into the inner cylinder 21, and the vicinity of the end of the inner cylinder 21 It becomes possible to suppress interference between flows of the treated liquid W0 having different moving directions, and it becomes possible to form a stable circulating flow.

Further, it is preferable that the inner cylinder 21 is provided with a mechanism for smoothly moving the supplied liquid W0 to be treated. For example, as shown in FIG. 1, a transfer screw 21a may be provided in the inner cylinder 21. can be mentioned. By operating the transfer screw 21a by the drive mechanism 21b (motor), the liquid to be treated W0 supplied from the liquid to be treated supply section moves (flows down) without clogging the inside of the inner cylinder 21.

The outer cylinder 22 stores the liquid to be processed W0 discharged from the inner cylinder 21 and separates the liquid to be processed W0 into a processing liquid W1 and a processing liquid W2, and has a larger diameter than the inner cylinder 21. Examples include those made of a tubular member.
The specific material and shape of the outer cylinder 22 are not particularly limited. For example, as an example of the shape of the outer cylinder 22, as shown in FIG. An example of this structure is to form a flow path as the second recovery section 25 that recovers the liquid W2. It is preferable that the second recovery unit 25 is provided with a conveying means for smoothly conveying the processing liquid W2 (a solution with a high solids content), such as a slurry pump or a transfer screw. Examples include.

The rectifying member 23 reverses the flow of the liquid to be treated W0 discharged from the inner cylinder 21, and is located at the end of the inner cylinder 21 on the side from which the liquid to be treated W0 is discharged (the lower end of the inner cylinder 21 in FIG. 1). One example is one having a rectifying surface 23a provided so as to face the opening. Here, the rectifying surface 23a may be any surface as long as it can reverse the flow of the liquid to be treated W0 discharged from the inner cylinder 21, and may be a horizontal surface or a combination of inclined surfaces. It may be something.
In addition, as shown in FIG. 1, the rectifying member 23 serves to invert the liquid to be treated W0 discharged from the inner cylinder 21, and also to provide a flow path to the second recovery part 25 provided on the bottom side of the outer cylinder 22. It may also have a structure that performs formation.

The magnetic field generating section 30A is arranged outside the separating section 20 and generates a magnetic field outside the inner tube 21. More specifically, the magnetic field generating unit 30A in this embodiment generates a magnetic field in the moving region of the liquid to be processed W0 in the separating unit 20 without directly contacting the liquid to be processed W0, thereby causing the liquid to be processed to A magnetic field is applied to W0.

The magnetic field generating section 30A may be anything that can generate a magnetic field from the outside of the separation section 20 to the outside of the inner tube 21 (particularly near the side wall of the outer tube 22). As a result, when applying a magnetic field to the liquid to be treated W0, the structure related to magnetic generation will not suffer from corrosion or failure due to contact with the liquid to be treated W0, and will improve the operation and maintenance of the magnetic separation device 10A. Such load is reduced.
Further, it is preferable that the magnetic field generating section 30A includes means (magnetic field moving means) capable of moving the generated magnetic field in a fixed direction. As a result, the movement of the magnetic material and the solid content magnetized by the magnetic material in the liquid to be treated W0 is guided in a certain direction, making it possible to improve solid-liquid separation (magnetic separation) efficiency.

As shown in FIG. 1, the magnetic field generating section 30A in this embodiment includes one that includes a magnet 31 and a belt conveyor 32 to which the magnet 31 is attached. Note that here, the belt conveyor 32 corresponds to a magnetic field moving means.
The magnet 31 may be any magnet as long as it can generate a magnetic field for a long period of time without receiving energy (magnetic field or current) from the outside, and examples thereof include permanent magnets such as alloy magnets, ferrite magnets, and rare earth magnets. It will be done.
As shown in FIG. 1, the belt conveyor 32 is provided so that the surface to which the magnet 31 is attached faces the side wall of the outer cylinder 22, and by rotating the belt conveyor 32, the magnet 31 generates The generated magnetic field moves in the direction of rotation of the belt conveyor 32 (in FIG. 1, from the center to the bottom of the outer cylinder 22).

The number of magnets 31 and belt conveyors 32 provided as the magnetic field generating section 30A is not particularly limited. For example, as shown in FIG. 1, in addition to providing a pair of belt conveyors 32, a plurality of belt conveyors 32 may be provided so as to surround the outer periphery of the outer cylinder 22.

Each process related to the magnetic separation method using the magnetic separation apparatus 10A in this embodiment will be explained based on FIG. 1.
First, as a separation process using a double tube structure having an inner tube 21 and an outer tube 22 according to the magnetic separation device 10A of this embodiment, starting from one end of the inner tube 21 (in FIG. 1, the upper end side of the inner tube 21) , the liquid to be treated W0 is supplied into the inner cylinder 21 via the liquid to be treated supply section (line L1) (liquid to be treated supplying step). The liquid to be treated W0 supplied inside the inner cylinder 21 moves along the inner cylinder 21 (flowing down in FIG. 1) and flows from the other end of the inner cylinder 21 (the lower end side of the inner cylinder 21 in FIG. 1). It is discharged into the outer cylinder 22.
At this time, by providing a rectifying member 23 on the other end side of the inner cylinder 21, the liquid to be treated W0 discharged from the inner cylinder 21 comes into contact with the rectifying member, so that the flow of the liquid to be treated W0 is reversed, and the flow of the liquid to be treated W0 is reversed. In the cylinder 22, the liquid to be treated W0 moves in the opposite direction to that in the inner cylinder 21 (straightening step). In addition, in the structure of the separation part 20 in this embodiment, as shown in FIG. Then, by returning to the inner cylinder 21 side again, a circulating flow is formed (light gray arrow in FIG. 1). Due to this circulating flow, the liquid W0 to be treated repeatedly passes through the magnetic field generated by the magnetic field generation step. This makes it possible to increase magnetic separation efficiency.

On the other hand, as a magnetic field generation step of generating a magnetic field from the outside of the double tube structure (outside of the outer tube 22) to the outside of the inner tube 21 (inside the outer tube 22) for performing the separation step, the belt conveyor 32 is rotationally driven. A magnetic field is generated by the magnet 31 from the center of the separating section 20 toward the bottom. As a result, the magnetic material and magnetically supported solid content in the liquid to be processed W0 move downward in the separating section 20 along the flow of the generated magnetic field, and the liquid to be processed W0 that has passed through the magnetic field moves downward. A portion moves toward the second recovery section 25 as the processing liquid W2 with increased magnetic substance content (dark gray arrow in FIG. 1).
In addition, the magnetic material and magnetically supported solid content contained in the liquid to be processed W0 are concentrated by passing through the magnetic field generated by the magnetic field generating section 30A, and are recovered as the processing liquid W2, while the magnetic material content decreases. The processed liquid W1 rises inside the outer cylinder 22 and is recovered by the first recovery section 24 (white arrow in FIG. 1).

Note that the processing liquid W1 and the processing liquid W2 collected through the first recovery section 24 and the second recovery section 25 may be utilized or further processed depending on the properties of each processing liquid.
For example, the treated liquid W1 collected by the first collection unit 24 may be used as water in another treatment facility, or may be discharged into a river or the like after undergoing pH adjustment, disinfection, etc. In addition, if the processing liquid W2 recovered by the second recovery unit 25 is introduced into a processing facility that collects and reuses only magnetic materials, or if it contains microorganisms as a solid content, the recovered processing liquid W2 may be directly used for biological treatment. Examples include returning the product to the facility.

Further, in FIG. 1, regarding the separation unit 20 in the magnetic separation apparatus 10A of the present embodiment, the liquid to be treated W0 is supplied from the upper end side of the inner cylinder 21, and the liquid to be treated W0 flowing down inside the inner cylinder 21 is transferred to the outer cylinder 22. Although the flow shown above is one in which a circulating flow is formed by rising inside the flow, the present invention is not limited to this.
FIG. 2 is a schematic explanatory diagram showing another aspect of the separation section 20 in the magnetic separation apparatus 1A of this embodiment.
As shown in FIG. 2, as another aspect of the separation section 20 in the magnetic separation device 10A of this embodiment, the liquid to be treated supply section (line L1) is provided at the lower end side of the inner cylinder 21, and the rectifying member 23 is provided at the lower end side of the inner cylinder 21. By providing it on the upper end side, the liquid to be treated W0 rising in the inner cylinder 21 descends in the outer cylinder 22 to form a circulating flow. Note that the description of the same components as shown in FIG. 1 will be omitted.

In the magnetic separation apparatus 10A shown in FIG. 2, the direction of the circulating flow of the liquid to be treated W0 (light gray arrow in FIG. 2) in the outer cylinder 22 and the direction in which the magnetic field moves by the magnetic field generating section 30A (the direction of the circulating flow of the liquid to be treated W2) The direction of movement (dark gray arrow in FIG. 2) is the same direction. Therefore, the flows of the processing liquid W0 and the processing liquid W2 in the outer cylinder 22 do not interfere with each other, and it is possible to form a stable circulating flow.

As described above, according to the magnetic separation apparatus 10A and the magnetic separation method of the present embodiment, the means for applying a magnetic field to the liquid to be processed containing a magnetic substance can perform magnetic separation in a non-contact state with the liquid to be processed. becomes possible. This makes it possible to reduce the load associated with operation and maintenance of the device. Further, according to the magnetic separation device 10A and the magnetic separation method of this embodiment, in a double pipe structure having an inner cylinder and an outer cylinder, the liquid to be treated can be supplied from one end of the inner cylinder, and a rectifying member can be provided at the other end. With this, a circulating flow of the liquid to be treated can be formed. This circulating flow allows the liquid to be treated to repeatedly pass through the magnetic field, thereby making it possible to increase the magnetic separation efficiency.

As described above, in the magnetic separation apparatus 10A in the first embodiment, the magnetic field generating section 30A includes the magnet 31 and the belt conveyor 32, but the present invention is not limited to this.
Hereinafter, as another embodiment of the magnetic separation apparatus of the present invention, another embodiment of the means (magnetic field generating section) for applying a magnetic field to the liquid to be processed W0 will be exemplified.

[Second embodiment]
FIG. 3 is a schematic explanatory diagram of a magnetic separation device 10B according to a second embodiment of the present invention.
As shown in FIG. 3, the magnetic separation device 10B according to this embodiment uses an electromagnet unit 33 made up of a plurality of electromagnets 33a as the magnetic field generating section 30B.
Note that, among the configurations of the magnetic separation device 10B in this embodiment, descriptions of those that are the same as the configuration of the magnetic separation device 10A in the first embodiment will be omitted.

As shown in FIG. 3, the magnetic field generating section 30B in this embodiment has a plurality of electromagnets 33a fixed and arranged vertically outside the separation section 20 as an electromagnet unit 33, and this electromagnet unit 33 is separated. An example of such a structure is that a plurality of them are provided along the outer periphery of the portion 20 (the outer periphery of the outer cylinder 22).
Here, in the electromagnet unit 33, it is preferable to uniformly supply current to the plurality of electromagnets 33a, and to form a uniform magnetic field in a certain range within the separating section 20. Similarly to the magnetic separation device 10A in this embodiment, it is preferable to provide a magnetic field moving means.
As the magnetic field moving means in the magnetic field generation section 30B of this embodiment, for example, a control means capable of controlling the current supplied to each electromagnet 33a is provided, and each electromagnet 33a arranged as an electromagnet unit 33 , control so that the current is supplied in order from the top to the bottom of the array (or from the bottom to the top of the array). This makes it easy for the operator to arbitrarily change the magnitude of the magnetic field generated by the magnetic field generator 30B and the moving speed of the magnetic field.

[Third embodiment]
FIG. 4 is a schematic explanatory diagram of a magnetic separation device 10C according to the third embodiment of the present invention.
As shown in FIG. 4, the magnetic separation device 10C according to this embodiment uses a magnet 35 attached to a spiral rotating body 34 provided on the outer periphery of the separation section 20 as the magnetic field generation section 30C. .
Note that, among the configurations of the magnetic separation device 10C in this embodiment, descriptions of those that are the same as the configuration of the magnetic separation device 10A in the first embodiment will be omitted.

As shown in FIG. 4, the magnetic field generating unit 30C in this embodiment includes a spiral member 34a that is wound around the outer circumference of the outer cylinder 22, and a drive mechanism 34b that rotationally drives the spiral member 34a. One example includes a helical rotating body 34 and a magnet 35 attached to the helical member 34a.

The spiral member 34a is not particularly limited in its specific structure as long as it has a width that allows the magnet 35 to be attached and a shape that follows the outer periphery of the separating section 20 (outer tube 22). . For example, as shown in FIG. 4, a ribbon-like member formed into a spiral shape may be used.
The drive mechanism 34b may be any mechanism as long as it can rotationally drive the spiral member 34a, and its specific structure is not particularly limited. For example, as shown in FIG. 4, an annular member is provided that is connected to the spiral member 34a and is rotatable around the outer periphery of the separation section 20 (outer periphery of the outer cylinder 22), and a ring member for rotating the annular member is provided. Examples include those equipped with gears and a motor (not shown).
The spiral rotating body 34 in this embodiment also serves as a magnetic field moving means.

The magnet 35 in this embodiment may be a permanent magnet or an electromagnet. Furthermore, the number of magnets 35 provided on the spiral rotating body 34 is not particularly limited.

By rotating the spiral rotating body 34 to which the magnet 35 is attached outside the separating section 20 (outer circumference of the outer cylinder 22), a relatively small number of parts can be used to rotate the helical rotating body 34 on the outside of the inner cylinder 21 (near the side wall of the outer cylinder 22). It becomes possible to generate a magnetic field over a wide range and to move the magnetic field. This makes it possible to improve the magnetic separation efficiency and to save space and reduce costs as the magnetic separation device 10C.

In addition, the embodiment mentioned above shows an example of a magnetic separation apparatus and a magnetic separation method. The magnetic separation device and magnetic separation method according to the present invention are not limited to the embodiments described above, and the magnetic separation device and magnetic separation method according to the embodiments described above are applicable without changing the gist of the claims. May be deformed.

The magnetic separation device and magnetic separation method of the present invention can be suitably used for magnetic separation of a liquid to be processed containing a magnetic substance. Further, the magnetic separation apparatus and magnetic separation method of the present invention can be suitably used for magnetic separation of a liquid to be treated containing solid content made of magnetic and non-magnetic substances.

10A, 10B, 10C magnetic separation device, 20 separation section, 21 inner tube, 21a transfer screw, 21b drive mechanism, 22 outer tube, 23 rectification member, 23a rectification surface, 24 first recovery section, 25 second recovery section, 30A , 30B, 30C magnetic field generation section, 31 magnet, 32 belt conveyor, 33 electromagnet unit, 33a electromagnet, 34 spiral rotating body, 34a spiral member, 34b drive mechanism, 35 magnet, L1 line (processed liquid supply section), W0 Processing liquid containing magnetic substance, W1 Processing liquid with low magnetic substance content, W2 Processing liquid with high magnetic substance content

Claims (5)

a separation part consisting of a double pipe structure having an inner cylinder and an outer cylinder;
a magnetic field generating section that is disposed outside the separating section and generates a magnetic field outside the inner cylinder,
A magnetic separation device, wherein the separating section is supplied with a liquid to be processed containing a magnetic substance from one end of the inner cylinder, and has a flow regulating member at the other end of the inner cylinder. 2. The magnetic separation apparatus according to claim 1, wherein the liquid to be treated also contains a solid content made of a non-magnetic material. 3. The magnetic separation apparatus according to claim 1, wherein the magnetic field generation section includes means for moving a magnetic field in a fixed direction. The separation section includes a first collection section that collects a processing liquid with a reduced magnetic substance content compared to the processing liquid, and a first collection section that collects a processing liquid with an increased magnetic substance content compared to the processing liquid. 4. The magnetic separation apparatus according to claim 1, comprising: two recovery sections. A separation process using a double pipe structure having an inner cylinder and an outer cylinder,
a magnetic field generation step of generating a magnetic field from the outside of the double tube structure to the outside of the inner cylinder,
The separating process includes a liquid to be treated liquid supplying process in which a liquid to be treated containing a magnetic substance is supplied from one end of the inner cylinder, and a rectifying member provided at the other end of the inner cylinder to reduce the liquid to be treated in the inner cylinder. A magnetic separation method comprising: a rectifying step of reversing the moving direction of the liquid to be processed outside the inner cylinder.