JP2003080108A - Purifier using magnetic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a purifier using a magnetic material capable of fully exhibiting a function for catching all suspended solids against the total volume of water to be treated passing through a suspended solid collection area where a filter is set, momentarily generating and eliminating a magnetic field in the collection area, and washing the filter in a short time. SOLUTION: Bulk magnets separable from a conduit pipe made of a nonmagnetic material are disposed so that magnetic fields along the flow of water to be treated in the conduit pipe are generated in a state where the same polarity sides of the magnets face each other across the flow. The suspended solids flowing in the flow passage are caught in the suspended solid collection area, which is formed in the flow passage and is equipped with a filter, in a state where the bulk magnets approach the conduit pipe.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention mainly relates to a flocculant containing magnetic fine particles, which makes a contaminant in the water to be treated into a magnetically suspended solid, which is magnetically generated in the flow of the water to be treated. The present invention relates to a purification device for separating the floating solid matter from water to be treated.

[0002]

[Prior Art] Generally, purified water (clean water, sewage, industrial wastewater)
Treatment, especially when separating eutrophied sludge (mainly phosphorus-containing substances) from the water to be treated, for example, ferrite (such as magnetite) produced using a high gradient magnetic field Super-strong magnetic substance: hereinafter referred to as magnetic substance fine particles), which is a flocculant containing the contaminants in the water to be treated as magnetic suspended solids (flocs) in advance.

Then, the water to be treated in this state is introduced into a conduit made of a non-magnetic material having a superconducting solenoid coil wound outside, and a magnetic field is generated in the conduit by energizing the superconducting solenoid coil. A purifying device has been proposed which filters water to be treated through a filter placed in this magnetic field and then removes and collects suspended solids attached to the water from the filter.

This purifying device is excellent in that it can generate a magnetic field in a direction parallel to the flow of the water to be treated and has a good separation efficiency of suspended solids by the filter. At the same time that the magnetic particles are trapped, the filter needs to be washed while the magnetic field has to be switched off.

The problem here is that when a superconducting solenoid coil is used, the apparatus becomes expensive, and especially when it is a low temperature superconducting solenoid, it takes a long time (usually 30 minutes for each) for excitation / demagnetization. ) Is required, the filter washing must be interrupted for a considerably long time in the operation of separating suspended solids.

[0006]

SUMMARY OF THE INVENTION The present invention has been made based on the above circumstances, and its object is to parallelize the flow of water to be treated when trapping suspended solids by magnetic force. It is an object of the present invention to provide a purification device using a magnetic material at low cost, which can exhibit high separation efficiency by a filter by generating a strong magnetic field and can easily perform filter cleaning in a short time.

[0007]

Therefore, in the present invention,
A flocculant containing magnetic fine particles to remove contaminants in the water to be treated.
As a magnetically suspended solid, in the flow of water to be treated,
In a purification device that separates the suspended solids from the water to be treated by a magnetic force, a magnetic field is formed along the flow with the same poles facing each other across the flow of the water to be treated in a conduit made of a non-magnetic material. As described above, a bulk magnet that is separable from and to the conduit is disposed, and the floating solid matter flowing in the flow path is provided in the flow path in a state where the bulk magnet is close to the conduit. It is characterized in that it is configured so as to be captured in a suspended solids recovery region having a filter.

In such a configuration, the direction of the magnetic field generated by the magnet is along the flow of the water to be treated, and the total amount of the water to be treated passes through the floating solids recovery region using the filter. In addition to fully exerting the trapping function of suspended solids, the magnetic field in the recovery area can be instantly generated and extinguished by the contacting / separating operation of the bulk magnet, so that there is an advantage that the filter can be washed in a short time. .

In this case, as an embodiment of the present invention, it is preferable that a magnetic sensitive material is used as a material of the filter, and the magnetic sensitive material is braided with a required mesh. There are a plurality of pairs of magnets, and it is effective as an example of expanding the embodiment that the adjacent magnetic poles are arranged so that the same magnetic poles facing each other are opposite in direction. Moreover, in the conduit,
It is also a preferred embodiment that the magnetic field between the pair of bulk magnets in the floating solids recovery region is also equipped with a filter.

Further, the filter is back-washed in the floating solid matter recovery region with a cleaning liquid introduced through an introduction path and an exit path communicating with the conduit, so that the magnetic field is removed. The filter can be regenerated and the suspended solids attached to the filter can be peeled off and discharged to the outside.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. Note that FIG. 1 shows the first
2 is a schematic side view showing a configuration example of FIG. 2, FIG. 2 is a schematic side view showing a second configuration example, FIG. 3 is a diagram showing an arrangement of bulk magnets in the embodiment for generating a magnetic field, and FIG. FIG. 5 is a diagram for explaining a situation in which a bulk magnet is moved for cleaning from a magnetic field generation state, FIG. 5 is an explanatory view showing a situation when a suspended solid matter is captured by a filter, and FIG. 6 is a situation when a filter is washed. FIG.

The purifying apparatus according to the present invention is a flocculant containing magnetic fine particles, and makes the suspended solids in the water to be treated into magnetic suspended solids SL, and by the magnetic force in the flow of the water to be treated W. The suspended solid SL is separated from the water W to be treated. Here, non-magnetic material (eg hard synthetic resin)
To form a magnetic field along the flow of water to be treated in a conduit 1 (pipe) consisting of 1
A bulk magnet 2 that can be brought into and out of contact with is arranged (see FIG. 3).
And FIG. 4).

The bulk magnet 2 is, for example, 1 to 3.
It is a bulk material magnetized in Tesla (ceramic oxide superconductor obtained by baking and hardening various metal oxides). Then, in the state where the bulk magnet 2 is brought close to the conduit 1 (a magnetic field strength of about 1 tesla is obtained between the bulk magnets 2), the suspended solid matter SL flowing in the conduit 1 is provided in the conduit 1. The suspended solids recovery region 4 having the filter 3 is captured.

In this embodiment, in the configuration example shown in FIG. 1, the filter 3 is composed of, for example, a fine mesh braided member made of a magnetic sensitive material such as ferrite, and cooperates with the bulk magnet 2 to produce a floating solid. Item collection area 4
Thus, a magnetic field parallel to the flow direction of the water to be treated is formed.

In the configuration example shown in FIG. 2, a plurality of pairs of bulk magnets 2, 2'are arranged in the longitudinal direction of the conduit 1,
A filter 5 is also installed in the center of the suspended solids recovery area 4. In this case, since a magnetic field parallel to the flow of the water to be treated is formed at the position where the filter 5 is present, each pair of adjacent bulk magnets 2 and 2 ′ has its opposing magnetic poles
The adjacent pairs are arranged so as to have different polarities.
That is, for example, when the opposing magnetic poles of the bulk magnets 2 are N poles, the opposing magnetic poles of the adjacent bulk magnets 2'are S poles.

As shown in FIGS. 3 and 4, the bulk magnets 2 (or 2 ′) facing each other with the conduit 1 interposed therebetween are housed in a vacuum container 6, and the vacuum container 6 is supported by a support member 7. Has been done. Further, the support member 7 can be vertically moved up and down by an appropriate drive means (not shown) together with the device housing 8 accommodating a small refrigerator, a vacuum pump and the like (not shown). It is possible to instantly realize the generation and disappearance of the magnetic field in the floating solid matter recovery region 4 in the conduit 1 by moving the bulk magnet from and to the bulk magnet.

Here, in order to enhance the heat insulating property by the function of the vacuum pump, the inside of the vacuum container 6 is brought into a vacuum state, and by the function of the small refrigerator, a bulk magnet is placed in the vacuum container 6. It is maintained at an ultralow temperature (preferably, an absolute temperature of 4 to 100 degrees) by using a refrigerant such as helium gas.

With such a structure, as in the case of using a superconducting solenoid coil, a sufficient magnetic field can be generated along the flow of the water to be treated in the conduit 1, and by using a bulk magnet, Compared with the equipment that uses the conduction solenoid, the equipment can be greatly simplified, and the advantage that it can be provided at low cost can be obtained. Moreover, unlike the low-temperature superconducting solenoid, it is not necessary to take a long time to excite and demagnetize the filter when cleaning the filter, and the magnetic field can be instantly extinguished from the suspended solid recovery region 4, so the cleaning time can be shortened. Is. This is effective in increasing the overall separation efficiency of suspended solids.

FIG. 4 and FIG. 5 are schematic views showing the flow state and the washing state of the filter 3 (or 5) when the suspended solids are separated from the water to be treated in the embodiment of the present invention. It is shown in the figure. Here, conduit 1
Gate valves 9 and 10 are respectively provided on the introduction side and the discharge side of the treated water in the suspended solids recovery area 4 therein, and the introduction of cleaning water communicating with the conduit 1 in the suspended solids recovery area 4 is performed. The passage 11 and the outlet passage 12 are equipped with open / close valves 13 and 14, respectively.

Therefore, the gate valves 9 and 10 are opened,
With the open / close valves 13 and 14 closed, as described above,
Separation of suspended solids by filter 3 (or 5)
When the filter is backwashed, the gate valves 9 and 10 are closed, the open / close valves 13 and 14 are opened, and washing water is introduced from the introduction path 11 to remove the filter. The floating solid matter adhered to can be peeled off and can be discharged to the outside through the outlet 12 together with the washing water.

In this embodiment, in order to briefly describe the generation of the magnetic field by the bulk magnet and the removal of the suspended solids captured by the filter, the suspended solids from the water to be treated in the single-row conduit 1 are described. In order to make the removal work of suspended solids continuous, in actuality, a part of the conduit 1 is double row (at least two rows), A floating solids recovery area 4 and a bulk magnet, a filter, and the like corresponding to the floating solids recovery area 4 are provided therein, and equipment for cleaning the filter is provided. It is preferable that the recovery of the suspended solids is continued in another area even when the operation is performed.

[0022]

As described above, the present invention is a flocculant containing magnetic fine particles, which makes the suspended solids in the water to be treated into magnetic suspended solids in the flow of the water to be treated. In the purifying device for separating the suspended solids from the water to be treated by magnetic force, the magnetic field along the flow in the state where the same poles face each other across the flow of the water to be treated in the conduit made of a non-magnetic material. A bulk magnet that can be separated from and attached to the conduit so as to form the above, and the floating solid matter flowing in the flow path is provided in the flow path in a state where the bulk magnet is close to the conduit. The present invention is characterized in that it is configured so as to be trapped in a suspended solids recovery area having a filter.

Therefore, with respect to the total amount of the water to be treated which has passed through the floating solids recovery area using the filter, the function of capturing all the floating solids can be sufficiently exerted, and the contacting and separating operations of the bulk magnet can Since the magnetic field can be instantly generated and disappeared in the recovery area, the filter can be washed in a short time.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a first configuration example in an embodiment according to the present invention.

FIG. 2 is likewise a schematic side view showing a second configuration example.

FIG. 3 shows an arrangement of bulk magnets in that embodiment for magnetic field generation.

FIG. 4 is a diagram for explaining a situation in which a bulk magnet is moved for cleaning from a magnetic field generation state.

FIG. 5 is an explanatory view showing a situation at the time of capturing suspended solids by a filter.

FIG. 6 is an explanatory diagram showing a situation during filter cleaning.

[Explanation of symbols]

1 conduit 2,2 'bulk magnet 3 filters 4 Floating solids collection area 5 filters 6 vacuum vessels 7 Support member 8 device housing 9,10 Gate valve 11 Introduction route 12 Derivation route 13, 14 open / close valve SL suspended solids W treated water

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hidehiko Okada             1-3-3, Minamisenkita, Morioka City, Iwate Prefecture F-term (reference) 4D015 BA11 BB05 CA01 DA37 EA35                       EA40

Claims (5)

[Claims] 1. A flocculant containing magnetic fine particles is used to convert contaminants in water to be treated into suspended solids having magnetism, and the suspended solids are treated by magnetic force in a stream of treated water. In a purification device that separates from water, the conduit is made of a non-magnetic material and separated from the conduit so as to form a magnetic field along the flow with the same poles facing each other across the flow of the water to be treated. A bulk magnet that can be contacted is arranged, and in a state where the bulk magnet is brought close to a conduit, the floating solid matter flowing in the flow channel is captured by a floating solid matter recovery region provided with a filter in the flow channel. A purifying device using a magnetic material, characterized in that 2. The magnetic material according to claim 1, wherein a magnetic sensitive material is used as a material of the filter, and the magnetic sensitive material is braided with a required mesh. Purification device. 3. The bulk magnet includes a plurality of pairs, and the bulk magnets are arranged such that directions of the same magnetic poles facing each other are opposite to those of the adjacent pairs. A purifying device using the magnetic substance described in 2. 4. The filter according to claim 3, wherein the magnetic field between the pair of bulk magnets in the suspended solids recovery region is also provided in the conduit. Purification device using magnetic material. 5. The filter is backwashed with a cleaning liquid introduced through an introduction path and an exit path communicating with a conduit in the floating solids recovery region.
A purification device using the magnetic body according to claim 1.