JP4009699B2 - Purification device using magnetic material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is mainly a flocculant containing magnetic fine particles, and the contaminants in the water to be treated are made to be floating solids having magnetism, and the suspended solids are covered by the magnetic force in the flow of the water to be treated. The present invention relates to a purification device that separates from treated water.
[0002]
[Prior art]
In general, in the treatment of purified water (water, sewage, industrial wastewater), particularly when separating eutrophic sludge (mainly phosphorus-containing material) from the treated water, it was generated using a high gradient magnetic field. For example, it is a flocculant containing ferrite (powder or granular ferromagnet: hereinafter referred to as magnetic fine particles) such as magnetite. It is said.
[0003]
Then, the water to be treated in this state is led into a conduit made of a nonmagnetic material around which a superconducting solenoid coil is wound, and a magnetic field is generated in the conduit by energizing the superconducting solenoid coil. There has been proposed a purification device that filters the water to be treated through a filter placed therein, and then removes and collects suspended solids attached to the filter from the filter.
[0004]
This purification device is superior in that it generates a magnetic field in a direction parallel to the flow of water to be treated and has good separation efficiency of suspended solids by the filter. At the same time that the particles are trapped, the filter needs to be cleaned, while the magnetic field must be turned off.
[0005]
The problem here is that when a superconducting solenoid coil is used, the device becomes expensive. In particular, if it is a low-temperature superconducting solenoid, excitation and demagnetization require a long time (usually 30 minutes each). Therefore, in the separation work of suspended solids, the filter cleaning must be interrupted considerably long.
[0006]
[Problems to be solved by the invention]
The present invention has been made on the basis of the above circumstances, and the object of the present invention is to generate a magnetic field parallel to the flow of water to be treated when capturing suspended solids by magnetic force. In addition, it is possible to provide a purification device using a magnetic material at a low cost, which can exhibit high separation efficiency due to the above, and can replace the filter without interrupting the work.
[0007]
[Means for Solving the Problems]
For this reason, the purification apparatus using the magnetic material according to the present invention includes: (1) a flocculant containing magnetic fine particles, and the pollutant in the water to be treated is made a floating solid substance having magnetism, and the flow of the water to be treated is in the middle, by a magnetic force, the purifying device for separating the suspended solids from the water to be treated, (2) a conduit for straight Ri Do a non-magnetic material, with respect to the conduit flow the water to be treated inside Te, wherein at conduit in proximity to the outside across the conduit, are arranged a pair of bulk magnet as the magnetic pole surface while being opposed pole faces of the same polarity is parallel to the straight direction of the conduit A magnetic field including a portion parallel to the straight direction of the conduit is formed in the conduit; and (3) the floating solids flowing in the conduit are suspended in the middle of the conduit across the magnetic field. The suspended solids are captured in the solids collection area. Includes a filter to be inserted into the collection area, (4) the filter has a plurality of sets is set detachably on the replacement support, the operation of the exchange support, the set is selectively said (5) There are a plurality of pairs of the bulk magnets, arranged with a gap along the straight direction of the conduit, and the polarities of the opposing magnetic pole faces of the same polarity are arranged. the adjacent pairs being arranged so as to be opposite, (6) before Symbol replacement support is interposed in a gap of the pairs of the plurality of bulk magnets the adjacent, the suspended solids recovery area, the adjacent The inner region of the conduit corresponding to the gap between a plurality of pairs of bulk magnets .
[0008]
In such a configuration, the direction of the magnetic field by the magnet is along the flow of the water to be treated, and all the floating solids with respect to the total amount of the water to be treated that passes through the floating solid collection area using the filter. In addition to being able to fully perform the trapping function of the above, since the filter replacement can be performed instantly, the treatment work of the treated water by the bulk magnet can be performed continuously without substantial interruption, so when using a superconducting solenoid, In particular, unlike the case of using a low-temperature superconducting solenoid that takes time for excitation and demagnetization, there is no need to interrupt the operation for a considerable period of time, and continuous operation is possible, resulting in an advantage of improving the operating rate.
[0009]
In this case, as an embodiment of the present invention, it is preferable that a magnetic material is used as a material for the filter, and the filter material is braided with a required mesh. As an example in which the embodiment is expanded, it is effective to arrange the adjacent magnetic poles so that the directions of the magnetic poles facing each other are opposite to each other.
[0010]
Moreover, the replacement support is a disk-shaped rotating member provided with a support shaft outside the conduit, and a part of the support is configured to be liquid-tightly inserted into the floating solid collection region. This is a preferred embodiment.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a plan view showing a schematic configuration, and FIG. 2 is a front view showing a disk-like rotating member equipped with a filter.
[0012]
The purification apparatus according to the present invention is a flocculant containing magnetic fine particles, and the contaminants in the water to be treated are made to be a floating solid substance S having magnetism. The object S is separated from the water W to be treated. Here, a magnetic field (indicated by a line of magnetic force M) along the flow with the same poles facing each other across the flow of water to be treated in the conduit 1 (pipe) made of a nonmagnetic material (for example, hard synthetic resin). ), Bulk magnets 2, 2 ′, 2 ″ are arranged with respect to the conduit 1 (see FIG. 1).
[0013]
The bulk magnets 2, 2 ′, 2 ″ are, for example, bulk materials magnetized to 1 to 5 Tesla (high-temperature superconducting bulk materials, oxide superconductors made of ceramics obtained by baking various metal oxides) Then, the bulk magnets 2, 2 ′, 2 ″ are brought close to the conduit 1 (about 1 Tesla is obtained as the magnetic field strength between the bulk magnets 2) and flows in the conduit 1. The suspended solid S is configured to be captured in a suspended solids collection area 4, 4 ′ with a filter 3 provided in the conduit 1.
[0014]
In this embodiment, the filter 3 is composed of a fine mesh braided member made of a magnetic material such as ferrite, for example, and in combination with the bulk magnets 2, 2 ′, 2 ″ Even 4 'forms a magnetic field parallel to the direction of the water to be treated.
[0015]
In this embodiment, a plurality of pairs of bulk magnets 2, 2 ′, 2 ″ are arranged in the longitudinal direction of the conduit 1. In this case, the flow of the water to be treated at the position where the filter 3 is present. In order to form a parallel magnetic field, each pair of adjacent bulk magnets 2, 2 'and 2', 2 "is arranged such that the respective opposing magnetic poles are different with respect to the adjacent pair. For example, when the opposing magnetic poles of the bulk magnet 2 are respectively N poles, the opposing magnetic poles of the adjacent bulk magnet 2 'are respectively S poles, and the opposing magnetic poles of the next bulk magnet 2 "are respectively N poles.
[0016]
As shown in FIG. 2, a plurality of sets of filters 3 are detachably set on the replacement supports 5 and 5 ′, and each set is selectively floated by operating the replacement support. It is inserted into the object collection area 4 or 4 ′. The exchange support 5, 5 ′ is a disk-shaped rotating member provided with the support shafts 5 a, 5 a ′ outside the conduit 1, and a part of the support 5, 5 ′ is, for example, a floating solid collection region via an O-ring 6 4, 4 ′ is inserted in a liquid-tight manner. Note that the bulk magnets 2 (or 2 ′, 2 ″) facing each other with the tube 1 interposed therebetween are accommodated in a vacuum vessel (not shown).
[0017]
Here, in order to improve heat insulation by the function of the vacuum pump, the inside of the vacuum container is evacuated and the bulk magnet is replaced with a refrigerant such as helium gas in the vacuum container by the function of the small refrigerator. Is maintained at an ultra-low temperature (preferably an absolute temperature of 4 to 100 degrees).
[0018]
In the figure, reference numerals 7 and 8 denote gate valves respectively provided on the inlet side and outlet side of the treated water of the conduit 1.
[0019]
In such a configuration, when the water to be treated is allowed to flow through the conduit 1 with the gate valves 7 and 8 opened, the suspended solids can be separated and collected by the filter 3 as described above. At an appropriate time, the replacement support 5, 5 ′ can be rotated to lead the filter 3 out of the conduit 1, and a new filter 3 can be made to correspond to the suspended solids collection area 4, 4 ′.
[0020]
Therefore, as in the case of using a superconducting solenoid coil, a sufficient magnetic field can be generated along the flow of water to be treated in the conduit 1, and a superconducting solenoid is used by using a bulk magnet. Compared with equipment, the equipment can be greatly simplified, and the merit of being provided at low cost can be obtained. In addition, the filter can be replaced without interrupting the operation, the operation state can be substantially continued, and the operating rate can be improved.
[0021]
In this embodiment, in order to briefly explain the generation of the magnetic field by the bulk magnet and the removal of the suspended solids captured by the filter, the recovery of the suspended solids from the water to be treated in the single-line conduit 1 is described. In order to maintain the continuous removal work of suspended solids in consideration of enlargement of the scale and repair, etc., the conduits 1 are actually arranged in double rows (at least 2). It is desirable to provide a suspended solids collection region, a corresponding bulk magnet, a replaceable filter using a support member, and the like.
[0022]
【The invention's effect】
According to the present invention, with respect to the total amount of water to be treated that passes through the floating solids recovery area using a filter, it is possible to sufficiently exhibit the trapping function of all the floating solids, and in the replacement operation of the filter, The continuous operation can be substantially maintained without generating or extinguishing the magnetic field in the recovery region.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing an embodiment according to the present invention.
FIG. 2 is a schematic front view showing the configuration of a replacement support body that allows the filter to be replaced.
[Explanation of symbols]
1 Conduit (Piping)
2, 2 ', 2 "Bulk magnet 3 Filter 4, 4' Floating solids collection area 5 Replacement support 6 O-ring 7, 8 Gate valve

Claims (3)

(1) A flocculant containing magnetic fine particles, and the pollutant in the water to be treated is made a floating solid with magnetism, and the suspended solid is separated from the water to be treated by magnetic force in the flow of the water to be treated. In the purification device to separate,
(2) a conduit for straight Ri Do a non-magnetic material, with respect to the conduit flow the water to be treated therein, proximate to the exterior of said conduit across the conduit, pole faces of the same polarity A pair of bulk magnets are arranged so that the magnetic pole faces are parallel to the straight direction of the conduit in a state where they face each other, and a magnetic field including a portion parallel to the straight direction of the conduit is formed inside the conduit. ,
(3) A filter inserted into the floating solid collection region so that the floating solid flowing in the conduit is captured by the floating solid collection region provided in the middle of the conduit across the magnetic field. Has
(4) A plurality of sets of the filters are detachably set on the replacement support, and one set is selectively inserted into the floating solid collection region by the operation of the replacement support.
(5) There are a plurality of pairs of the bulk magnets arranged with gaps along the straight direction of the conduit so that the polarities of the opposing magnetic pole faces of the same polarity are opposite to the adjacent pairs. Placed in
(6) before Symbol replacement support is interposed in a gap of the pairs of the plurality of bulk magnets the adjacent, the suspended solids recovery zone corresponds to the gap between the pair of the plurality of bulk magnets said adjacent said A purification device using a magnetic material, characterized in that it is an inner region of a conduit .   2. The purification apparatus using a magnetic material according to claim 1, wherein a magnetic material is used as a material of the filter, and the filter is braided with a required mesh. The replacement support is a disk-shaped rotating member having a support shaft outside the conduit, and a part of the support is inserted into the floating solid collection region in a liquid-tight manner. A purification device using the magnetic material according to claim 1 or 2 .

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