JP5129155B2 - Magnetic separation device - Google Patents

Description

  The present invention relates to a magnetic separation device for removing a magnetic substance contained in a fluid to be treated by a magnetic filter.

In order to smoothly perform good magnetic separation in this type of magnetic separation apparatus, a step of adsorbing the magnetic substance in the fluid to be treated to the magnetized magnetic filter, and washing the adsorbed magnetic substance by washing the demagnetized magnetic filter A mechanism that repeats the steps alternately is necessary. Conventionally, an apparatus described in Patent Document 1 below is known as such a technique. In this apparatus, a magnetic field is generated by a superconducting magnet, and a magnetic filter related to magnetic separation is reciprocated with respect to the superconducting magnet, whereby magnetization and demagnetization of the magnetic filter are alternately repeated.
JP 10-85524 A

  However, in order to bring the water to be treated into contact with the magnetic filter, the water to be treated is allowed to pass through the position where the magnetic field is generated. Therefore, the position of the magnetic field is sealed and the magnetic filter is placed at the position of the magnetic field. As a result, the structure of the apparatus becomes complicated even in the above apparatus. In such a magnetic separation apparatus, a simpler structure is required also from the viewpoint of the manufacturing cost and maintainability of the apparatus.

  Therefore, an object of the present invention is to provide a magnetic separation device capable of simplifying the structure.

  The magnetic separation device of the present invention is a magnetic separation device that removes magnetic substances contained in a fluid to be treated by a magnetic filter, and extends through the bore portion of the magnet and is arranged in the extending direction. Is transported in the extending direction, and the adsorption processing unit that adsorbs the magnetic substance in the introduced processing fluid to the magnetic filter, and the magnetic filter that is discharged from the end of the adsorption processing unit and returned to the beginning of the adsorption processing unit again A filter return path for transporting the magnetic filter, a filter cleaning section for cleaning the magnetic filter between the end of the adsorption processing section and the start end of the filter return path, and a filter cleaning section for removing the magnetic filter discharged from the end of the adsorption processing section. First filter transport means for transporting to the start end of the filter return path via the first filter transport means on a circular orbit in a plane perpendicular to the extending direction. Characterized by conveying the sex filter.

  In this magnetic separation apparatus, a plurality of magnetic filters are arranged in the extending direction in the adsorption processing unit, and the magnetic substance in the fluid to be treated is adsorbed by the magnetic filters. The magnetic filter is transported in the extending direction of the adsorption processing unit and sequentially discharged from the end. Thereafter, the magnetic filter is transported to the filter cleaning unit by the first filter transporting means, and the magnetic substance adsorbed in the demagnetized state in the filter cleaning unit is washed away to restore the adsorption function. Thereafter, the magnetic filter is transported to the start end of the filter return path by the first filter transport means, and after being transported through the filter return path, is again introduced from the start end of the adsorption processing unit to adsorb the magnetic substance.

  As described above, in this magnetic separation apparatus, the magnetic filter circulates such that the magnetic substance is adsorbed while moving the adsorption processing unit from the start end to the end, washed after being discharged from the end, and returned to the start end again. . By such circulation, the adsorption function of the magnetic filter in the adsorption processing unit is always maintained well, and a good fluid to be treated can be processed. Further, when the magnetic filter is transported from the end of the adsorption processing unit to the start of the filter return path through the filter cleaning unit, a circular orbit perpendicular to the extending direction of the adsorption processing unit is drawn. Such conveyance of the magnetic filter can be realized by a simple mechanism such as a rotational movement mechanism, and it is only necessary to make the rotation axis parallel to the extending direction of the adsorption processing unit. Therefore, the structure of the first filter conveying means is simplified. As a result, it contributes to the simplification of the entire magnetic separation device.

  Moreover, in order to exhibit the said effect | action, specifically, it is good also as a structure in which a 1st filter conveyance means has a rotation member which hold | maintains a magnetic filter and rotates in the surface orthogonal to the said extension direction.

  The magnetic separation device of the present invention further includes second filter transport means for transporting the magnetic filter discharged from the end of the filter return path to the start end of the adsorption processing section, and the first filter transport means is extended. It is preferable to transport the magnetic filter on a circular orbit in a plane orthogonal to the direction.

  According to this configuration, the second filter transport unit that transports the magnetic filter from the end of the filter return path to the start end of the adsorption processing unit can be simplified in the same manner as the first filter transport unit. As a result, it contributes to further simplification of the magnetic separation device. Further, in order to achieve the above action, specifically, the second filter transport means may have a rotating member that holds the magnetic filter and rotates in a plane orthogonal to the extending direction.

  Further, on the start end side of the adsorption processing unit, the magnetic filter is allowed to move from the start end to the end of the adsorption processing unit, and the magnetic filter is supported so as to prevent the magnetic filter from moving from the end to the start end of the adsorption processing unit. It is preferable to further comprise a filter support means. When the magnetic filter returns to the starting end side of the adsorption processing unit, the magnetic filter may be clogged in the adsorption processing unit, but in this way, the magnetic filter does not return to the starting end side of the adsorption processing unit. Therefore, the magnetic filter can be reliably conveyed from the start end to the end of the adsorption processing unit.

  Moreover, it is preferable that the magnetic filter is a cylindrical body in which the waist of the central portion is larger than the waist of both end portions. If it does in this way, a magnetic filter will come to move more smoothly in an adsorption processing part and a filter return path.

  According to the present invention, the structure of the magnetic separation device can be simplified while maintaining a sealed state.

FIG. 1 is a perspective view showing the magnetic separation device according to the first embodiment. FIG. 2 is an exploded perspective view of the magnetic separation device of FIG. 3 is a cross-sectional view taken along the line III-III of the magnetic separation device of FIG. 4 is a partially broken perspective view showing a magnetic filter used in the magnetic separation device of FIG. FIG. 5 is a perspective view showing a magnetic separation device according to the second embodiment. FIG. 6 is an exploded perspective view of the magnetic separation device of FIG. 7 is a cross-sectional view of the magnetic separation device in FIG. 5 taken along line VII-VII. FIG. 8 is a partially enlarged view showing the vicinity of the stopper of FIG. FIG. 9 is a perspective view showing a state in which the vicinity of the stopper of the magnetic separation device in FIG. 5 is partially broken. FIG. 10 is a partially broken perspective view showing a magnetic filter used in the magnetic separation device of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Magnetic separation apparatus, 3 ... Adsorption processing part, 3a ... Start end of adsorption processing part, 3b ... End of adsorption processing part, 5 ... Superconducting magnet (magnet), 5a ... Bore part, 9 ... Magnetic filter, 11 ... 1st Conveying section (first filter conveying means), 15 ... filter cleaning section, 17 ... filter return path, 17a ... start end of filter return path, 17b ... end of filter return path, 19 ... second transport section (second filter) Transport means), 27, 37... Rotating arm (rotating member), 43... Stopper (filter support means).

  Hereinafter, preferred embodiments of a magnetic separation device according to the present invention will be described in detail with reference to the drawings.

(First embodiment)
The magnetic separation device 1 shown in FIGS. 1 to 3 is a device for removing a magnetic substance contained in a waste liquid (a fluid to be treated), and is generated at, for example, a paper mill, a waste paper manufacturing factory, an iron manufacturing factory, a steel manufacturing factory, It is used for the treatment of waste liquid. The magnetic separation apparatus 1 includes an adsorption processing unit 3 that adsorbs and separates a magnetic substance from the introduced waste liquid by a magnetic filter. Adsorption treatment unit 3 is a space forming a picture made a cylindrical shape circular pipe member extends in a vertical direction through the bore portion 5a of the superconducting magnet 5 vertically. An introduction path 7 a for introducing the waste liquid is connected to the upper portion of the adsorption processing section 3, and a discharge path 7 b for discharging the processed processing liquid is connected to the lower section of the adsorption processing section 3. The waste liquid introduced into the adsorption processing unit 3 from the introduction path 7a is processed while flowing downward by the water head pressure, and is discharged from the discharge path 7b.

  Furthermore, a large number of magnetic filters 9 brought into contact with the waste water are accommodated in the adsorption processing unit 3 in a state of being arranged in the vertical direction, and are fully filled from the start end 3 a to the end end 3 b of the adsorption processing unit 3. The magnetic filter 9 has a disk-shaped wire mesh portion 9a and a cylindrical frame 9b that holds the wire mesh portion 9a (see FIG. 4). In the adsorption processing unit 3, the magnetic filter 9 is arranged so that the outer wall surface of the frame 9b is along the inner wall surface of the circular tube member that defines the adsorption processing unit 3, and the upper and lower end surfaces of the frames 9b abut against each other. Are stacked in the vertical direction.

  Among the magnetic filters 9 housed in the adsorption processing unit 3, in a plurality of magnetic filters 9 located at positions surrounded by the bore portion 5 a of the superconducting magnet 5, the wire mesh portion 9 a is magnetized by the magnetic field generated by the superconducting magnet 5. Therefore, these magnetic filters 9 adsorb magnetic substances contained in the waste liquid. Accordingly, the waste liquid introduced from the introduction path 7a flows through the adsorption processing unit 3 while being in contact with the many magnetized magnetic filters 9, so that the magnetic substance is removed and discharged from the discharge path 7b as the processing liquid. The

  In such a magnetic filter 9, if the adsorption of the magnetic substance is continued, the magnetic substance is accumulated in the wire mesh portion 9 a and the adsorption capability is lowered. Therefore, it is necessary to replace the magnetic filter 9 related to the adsorption process as needed. Therefore, in this magnetic separation apparatus 1, the magnetic filter 9 is circulated so that the magnetic filter 9 housed in the adsorption processing unit 3 is sent to the end 3b side as needed, washed, and then introduced again from the start end 3a side. I have to.

  Hereinafter, a specific configuration of the magnetic separation apparatus 1 for performing such circulation will be described. The magnetic separation device 1 includes a first transport unit (first filter transport unit) 11 connected to the upper end of the adsorption processing unit 3, and a filter provided on the transport path of the magnetic filter 9 in the first transport unit 11. Connected to the cleaning unit 15, the filter return path 17 that is connected so as to extend vertically downward from the first transport unit 11, and returns the magnetic filter 9 downward, and the lower end of the filter return path 17 and the lower end of the adsorption processing unit 3. And a second transport unit (second filter transport means) 19 for transporting the returned magnetic filter 9 to the start end 3a of the adsorption processing unit 3 again.

  Further, below the adsorption processing unit 3, a cylinder 21 is provided that pushes up a group of magnetic filters 9 stacked in the adsorption processing unit 3 in the vertical direction. When the magnetic filter 9 group is pushed up by the cylinder 21, the magnetic filter 9 located at the top of the adsorption processing unit 3 is pushed out from the terminal end 3 b of the adsorption processing unit 3 to the first transport unit 11.

  The first transport unit 11 includes a rotary arm (rotary member) 27 housed in a transport space 23 connected to the terminal end 3 b of the suction processing unit 3, and a vertical shaft 41 provided above the transport space 23. And a drive source motor 29 for rotating the rotary arm 27 in a horizontal plane. The transport space 23 is defined in a sealed state by a tray-like portion 23a and a lid portion 23b, and extends horizontally in a disc shape. Three circular openings 27a formed to fit the magnetic filter 9 are arranged at equal intervals on the edge of the rotary arm 27 that rotates horizontally in the transport space 23. With such a configuration, the magnetic filter 9 discharged from the terminal end 3b of the adsorption processing unit 3 is held by the rotating arm 27 by fitting into the circular opening 27a, and in this state, the rotating arm 27 rotates in the direction of arrow A. As a result, the magnetic filter 9 is transported while drawing a circular orbit in the transport space 23. When the rotary arm 27 rotates 120 °, the magnetic filter 9 reaches a cleaning position corresponding to the filter cleaning unit 15 provided on the transport path.

  The filter cleaning unit 15 has a function of cleaning the magnetic filter 9 that has reached the cleaning position, and includes a spray nozzle 15 a provided above the transfer space 23 and a recovery nozzle provided below the transfer space 23. 15b. The spray nozzle 15a sprays the cleaning liquid downward toward the magnetic filter 9 held in the circular opening 27a. At this position, since the magnetic field generated by the superconducting magnet 5 is extremely small, the attractive force of the magnetic filter 9 is weak. For this reason, the magnetic substance adhering to the metal mesh part 9a of the magnetic filter 9 is easily washed away by the above-mentioned washing liquid jetting, and the adsorption ability of the magnetic filter 9 is recovered. The washed waste liquid after washing is discharged out of the system through a recovery nozzle 15b below the magnetic filter 9. After the cleaning is completed, the rotating arm 27 is further rotated by 120 ° in the A direction, so that the magnetic filter 9 is conveyed to a position immediately above the filter return path 17.

  The filter return path 17 is defined by a circular pipe member having the same thickness as that of the suction processing unit 3. Like the suction processing unit 3, a large number of magnetic filters 9 are stacked and stored from the start end 17 a to the end 17 b. Has been. Above the filter return path 17, a cylinder 31 is provided that pushes down the group of magnetic filters 9 in the filter return path 17 in the vertical direction. When the group of magnetic filters 9 is pushed down by the cylinder 31, the magnetic filter 9 located at the bottom of the filter return path 17 is pushed out from the terminal end 17 b of the filter return path 17 to the second transport unit 19.

  This 2nd conveyance part 19 has the structure equivalent to the 1st conveyance part 11 mentioned above. That is, the second transport unit 19 has a rotating arm (rotating member) 37 housed in the transport space 33 connected to the terminal end 17 b of the filter return path 17. The conveyance space 33 is defined in a sealed state by a tray-shaped portion 33a and a lid portion 33b, and extends horizontally in a disc shape. The rotating arm 37 is arranged coaxially with the rotating arm 27 described above, and is connected to the rotating arm 27 by the shaft 41. Therefore, the rotary arm 37 rotates around the shaft 41 in synchronization with the rotary arm 27 using the motor 29 as a drive source. Similarly to the rotary arm 27, three circular openings 37 a formed so as to fit the magnetic filter 9 are arranged at equal intervals on the edge of the rotary arm 37.

  With such a configuration, the magnetic filter 9 discharged from the terminal end 17b of the filter return path 17 is held by the rotating arm 37 by fitting into the circular opening 37a, and in this state, the rotating arm 37 rotates in the arrow B direction. Thus, the magnetic filter 9 is transported while drawing a circular orbit in the transport space 33. When the rotary arm 37 rotates 120 °, the magnetic filter 9 reaches a position directly below the adsorption processing unit 3. Thereafter, the magnetic filter 9 is pushed into the adsorption processing unit 3 by the cylinder 21 and used for adsorption of the magnetic substance in the adsorption processing unit 3 as described above while being conveyed upward as needed.

  Such an operation of the magnetic separation device 1 is repeatedly performed at regular intervals, so that a large number of magnetic filters 9 are sequentially arranged in the adsorption processing unit 3 → the filter cleaning unit 15 → the filter return path 17 → the adsorption processing unit 3. It is conveyed and circulated in order. Therefore, the magnetic filter 9 that has been cleaned by the filter cleaning unit 15 is always sent to the adsorption processing unit 3 to perform a good waste liquid treatment. In the magnetic separation apparatus 1, the liquid level in the adsorption processing unit 3 and the filter return path 17 can be adjusted by adjusting the level of a pipe (not shown) connected to the downstream side of the discharge path 7b. it can. Further, regarding the pressure difference corresponding to the pressure loss of the waste liquid, the level of the filter return path 17 is adjusted so that the liquid level of the adsorption processing unit 3 becomes substantially constant at the height near the introduction path 7a.

  As described above, in the magnetic separation apparatus 1, the adsorption processing unit 3, the conveyance space 23 of the first conveyance unit 11, the filter return path 17, and the conveyance space 33 of the second conveyance unit 19 are sequentially connected and sealed. A circulation path is formed. Since a large number of magnetic filters 9 circulate without being taken out from the hermetic circulation path, there is no opening / closing operation of the hermetic circulation path during the operation of the magnetic separation device 1, and the amount of waste liquid diffused into the air is very large. Few. In addition, since the magnetic filter 9 is cleaned in the sealed space, scattering of the cleaning drainage to the outside of the apparatus 1 can be suppressed. Therefore, the magnetic separation apparatus 1 can be applied to treatment of waste liquid containing a solvent having a high vapor pressure and easily dissipating, and waste liquid containing a toxic substance.

  Further, in the circulation of the magnetic filter 9, the first transport unit 11 and the second transport unit 19 transport the magnetic filter by the rotational movements of the rotating arms 27 and 37 that rotate parallel and coaxial with each other. Such a rotational motion can be realized by a simple mechanism using a general-purpose motor 29 and a shaft 41, so that the entire magnetic separation device 1 can be simplified. In this case, since the rotary arm 27 and the rotary arm 37 are connected by the shaft 41, the drive source of the rotary arms 27 and 37 can be shared by one motor 29. Further, the fact that the adsorption processing unit 3, the filter return path 17, and the shaft 41 extend in parallel also contributes to the simplification, miniaturization, and sealing of the structure of the magnetic separation device 1.

(Second Embodiment)
Next, the magnetic separation device 2 according to the second embodiment will be described with reference to FIGS. Below, it demonstrates centering around difference with the magnetic separation apparatus 1 which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  In the magnetic separation device 2, the cylinder 31 and the shaft 41 are removed as shown in FIGS. The second transport unit 19 further includes a motor 39 as a drive source that rotates the disk-shaped rotating arm 37 in the horizontal plane. In the first transport unit 11, the disk-shaped rotating arm 27 is also a motor 29. Rotate directly by. Therefore, in the magnetic separation device 2, unlike the magnetic separation device 1, the rotating arms 27 and 37 are independently rotated by the motors 29 and 39. As shown in FIG. 6, one circular opening 27 a and 37 a sized to fit the magnetic filter 9 is formed at the edge of the rotary arms 27 and 37.

  As shown in FIGS. 7 to 9, the magnetic separation device 2 has three stoppers (filter support means) 43 disposed on the start end side of the adsorption processing unit 3. Specifically, the three stoppers 43 are provided on the upper surface of the basin 33a, around the circular opening 33c communicating with the inside of the suction processing unit 3 and on the upper surface of the basin 33a. Are arranged at equal intervals.

  The stopper 43 includes a stopper main body 43a and a pair of stopper support bodies 43b (see in particular FIG. 9). The stopper main body 43a is a plate-like body having an upper surface 43c and a back surface 43d. The back surface 43d of the stopper main body 43a is normally in contact with an annular wall portion 33d erected around the opening 33c. In other words, the stopper main body 43a is normally tilted so as to have a predetermined angle with respect to the vertical direction due to its own weight (hereinafter referred to as a normal state). The upper surface 43c of the stopper main body 43a is set to be a horizontal surface in the normal state.

  The stopper main body 43a is supported by a pair of stopper support bodies 43b via a shaft 43e. Therefore, the stopper main body 43a is rotatable around the shaft 43e. That is, when the magnetic filter 9 is pushed up toward the adsorption processing unit 3 by the cylinder 21, the stopper main body 43a is moved by the magnetic filter 9 until the longitudinal direction of the stopper main body 43a substantially coincides with the vertical direction as the magnetic filter 9 rises. Pushed up. When the magnetic filter 9 is further pushed up by the cylinder 21 until the magnetic filter 9 passes through the stopper main body 43a, the stopper main body 43a is in a normal state, and the magnetic filter 9 is supported by the upper surface 43c of the stopper main body 43a. Become. Accordingly, the stopper 43 allows the magnetic filter 9 to move from the start end to the end of the adsorption processing unit 3, while preventing the magnetic filter 9 from moving from the end to the start end of the adsorption processing unit 3.

  Here, the magnetic filter 9 used in the magnetic separation device 2 according to the second embodiment will be described. As shown in FIG. 10, the magnetic filter 9 includes a disk-shaped wire mesh portion 9a and a cylindrical frame 9b that holds the wire mesh portion 9a. The frame 9b has a so-called barrel shape in which the trunk of the central part is larger than the trunks of both end parts (the trunk central part swells). Therefore, when the magnetic filter 9 moves through the adsorption processing unit 3 and the filter return path 17, both end portions of the frame 9 b are hardly caught in the adsorption processing unit 3 and the filter return path 17. Therefore, the magnetic filter 9 can move more smoothly in the adsorption processing unit 3 and the filter return path 17.

  The magnetic separation device 2 according to the second embodiment as described above also exhibits the same effects as the magnetic separation device 1 according to the first embodiment.

  In the second embodiment, the magnetic separation device 2 has a stopper 43. Here, when the magnetic filter 9 returns to the start end side of the adsorption processing unit 3, the magnetic filter 9 may be clogged in the adsorption processing unit 3. However, in this way, the magnetic filter 9 does not return to the start end side of the adsorption processing unit 3, so that the magnetic filter 9 can be reliably conveyed from the start end to the end of the adsorption processing unit 3.

  In the second embodiment, since the rotary arms 27 and 37 are rotated independently, the magnetic filter 9 can be transported more smoothly in the magnetic separation device 2.

  In the magnetic separation device 2, the rotary arm 27 may have a fan shape. At this time, the rotating arm 27 can be further reduced in weight.

  Further, the magnetic filter 9 is supported, and the movement of the magnetic filter 9 from the start end to the end of the adsorption processing unit 3 is allowed while the movement of the magnetic filter 9 from the end to the start end of the adsorption processing unit 3 is prevented. Any device other than the stopper 43 can be used.

Claims (5)

In a magnetic separation device that removes magnetic substances contained in a fluid to be treated by a magnetic filter,
A plurality of the magnetic filters extending through the bore portion of the magnet and arranged in the extending direction are conveyed in the extending direction, and the magnetic substance in the introduced fluid to be treated is transferred to the magnetic filter An adsorption processing unit to adsorb to
A filter return path through which the magnetic filter discharged from the end of the adsorption processing unit and returned to the start end of the adsorption processing unit is conveyed;
A filter cleaning unit for cleaning the magnetic filter between the end of the adsorption processing unit and the start of the filter return path;
First filter transport means for transporting the magnetic filter discharged from the end of the adsorption processing unit to the start end of the filter return path via the filter cleaning unit;
A second filter transporting means for transporting the magnetic filter discharged from the end of the filter return path to the start of the adsorption processing unit ;
Each of the first and second filter transporting units transports the magnetic filter on a circular orbit in a plane orthogonal to the extending direction.   2. The magnetic separation device according to claim 1, wherein the first filter transport unit includes a rotating member that holds the magnetic filter and rotates in a plane orthogonal to the extending direction. The second filter conveying means, a magnetic separator according to claim 1 or 2, characterized in that it has a rotary member which rotates in a plane orthogonal to the extending direction holding the magnetic filter. On the starting end side of the adsorption processing unit, the magnetic filter is allowed to move from the start end to the end of the adsorption processing unit and the magnetic filter is prevented from moving from the end to the start end of the adsorption processing unit. magnetic separation device according to any one of claims 1 to 3, further comprising a filter support means for supporting the filter. The magnetic filter magnetic separation device according to any one of claims 1 to 4, wherein the waist circumference of the central portion is larger cylindrical body than waist circumference of both end portion.

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