JP2000153104A - Filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve washing efficiency and to prevent clogging by solid particles, by forming a filter layer of magnetic powder of filter medium on a support material, constituting a filter which prevents the loss of the magnetic powder by using magnetic force during backward washing, and making a collision object collide with the support during the backward washing. SOLUTION: When bath water and others are passed through a raw water supply/drain port 5, magnetic powder 7 forming a filter layer catches solid particles 10 and the like in the water for filtration. The filtrate passes through a support material 2 and is discharged from a treated water supply/drain port 6. A core is magnetized by energizing the coil of a magnet 8 during backward washing, and the magnetic powder 7 is attracted by the magnetic force. After that, the magnetic powder 7 is peeled off from the support material 2 with the passage of water from the port 6, the solid particles 10 and the like adherent to the magnetic powder 7 are also peeled off, and only the magnetic powder 7 is attracted to the magnet 8. Collision objects 9 housed in a treated water chamber 4 are made to collide with the support material 2, and the support material 2 is washed efficiently by the impact force of the collision.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for purifying water, for example, for purifying used bath water or removing turbid components of tap water.

[0002]

2. Description of the Related Art Conventionally used water purification devices include a sedimentation method using gravity sedimentation and centrifugal sedimentation, a flotation method using buoyancy, and a filtration method for sieving solid suspended matter.

[0003] The filtration method can obtain a large processing flow rate with a relatively small apparatus, and is widely used. The filtration method also employs a single-layer filtration that captures solid particles larger than the pore diameter on the porous membrane surface, and a layered filtration layer such as a laminated powder or fiber or a three-dimensional network structure. It is roughly classified into multi-layer filtration that captures solid particles in the internal gap. In any of the methods, since the filter medium is blocked by the solid particles captured while the filtration is continued, it is necessary to replace the filter medium or to regenerate the solid particles adhered to the filter medium.

[0004] Among these filtration methods, multi-layer filtration using a large-sized powder packed in a column is called sand filtration. In sand filtration, regeneration of a filtration layer called backwashing is generally performed. That is, the filter layer is wound up with a water stream, the captured solid particles are washed away with the water stream, and the filter medium is laminated using gravity sedimentation. It is a filtration type.

[0005]

SUMMARY OF THE INVENTION The conventional sand filtration is as follows.
There is a problem that when the size of a device that can be used in ordinary households is reduced when solid particles having a particle size of about micrometers are separated by filtration, backwashing cannot be performed. That is, it is necessary to reduce the particle size of the filter medium to be used to be close to the particle diameter of the material to be filtered.
Conventional backwashing, in which the particles of the material to be filtered and the particles of the filter medium are separated based on the difference in gravity sedimentation velocity, and the particles of the filter medium are sedimented and stratified, cannot be realized.

When the size of the solid particles attached to the filter medium is reduced to about a micrometer, the influence of the adsorbing force such as intermolecular force exerts a great effect, so that it cannot be washed away only by the water flow.

[0007] Further, the supporting material for holding the filter medium to be used has a fine gap structure because the filter medium does not flow away. Therefore, the clogging of the support material cannot be washed away only by the water flow. Further, if this filtration is repeatedly repeated and used, clogging progresses little by little, and eventually the support material may be closed.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the conventional method. A magnetic powder is used as a filter material, and a layer is formed on a support material and used as a filter layer.
A filter that uses magnetic force to prevent the loss of magnetic powder during backwashing. Efficient by providing multiple collision objects in the treated water chamber in the filter and colliding the collision object with the support during backwashing And clogging of the magnetic powder and the material to be filtered due to solid particles and the like is also removed.

[0009]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, water flowing from a water supply / drain port of a raw water chamber is filtered by a filtration layer composed of magnetic powder layered on a support material and drained from a water supply / drain port of a treated water chamber. At the time of backwashing, the magnet is operated to attract the magnetic powder to separate it from the support material, and solid particles (dirt) also adhered to the support material are removed by backwash water. At that time, a plurality of colliding objects randomly move around in the treated water chamber by backwashing water and collide with the support material, and can be effectively separated by the impact force. Then, the solid particles supplied from the water supply / drainage port of the treated water chamber and separated are discharged from the water supply / drainage port of the raw water chamber.

According to the second aspect of the invention, since the specific gravity of the collision object is smaller than the specific gravity of water, the collision object is always in contact with the support in the treated water chamber. Even when the collision object is moving around due to the flow of the washing water, the collision object is always substantially in contact with the support, so that the efficiency of separation of solid particles and the like is high. That is, at the time of back washing, the magnetic powder and the solid particles clogged in the support material can be peeled over the entire surface in a short time.

According to the third aspect of the present invention, since the specific gravity of the collision object is larger than the specific gravity of water, the collision object is separated from the support in the treated water chamber. That is, at the time of backwashing, the collision object is blown up and collides with the support, so that a stronger peeling force acts. By operating at the time of back washing, even if the magnetic powder and the solid particles clogged in the support material are stubbornly adhered or caught, they are strongly separated.

According to the fourth aspect of the present invention, since a grid having a smaller diameter than the colliding object is provided at the supply / drain port of the treated water chamber, the colliding object is washed away in any backwash water flow or filtered water flow. Nothing.

According to the fifth aspect of the present invention, since the collision object is made of a magnetic material, the collision object can be strongly collided with the support material, and the cleaning efficiency can be greatly improved.

According to a sixth aspect of the present invention, the collision object is:
Because it has a configuration with protrusions on its surface. A peeling effect can be obtained over details.

According to a seventh aspect of the present invention, the collision object is
Since the surface is subjected to antibacterial treatment, the surface of the colliding object always has an antibacterial action, so that the surface of the colliding object does not suffer from sticking due to bacteria and can maintain the cleaning effect by the collision for a long time. Further, each time the collision objects collide with each other, the antibacterial agent is scraped off little by little, and the antibacterial action spreads to the treated water chamber, the raw water chamber and the support material.

The invention described in claim 8 is provided with a stirring means in the treated water chamber, whereby the collision object can be intentionally moved at any time, and the cleaning effect is great. That is, the most effective impact is given to the support material by the stirring means, and the solid particles adhered firmly are more effectively separated.

[0017]

(Embodiment 1) Embodiment 1 of the present invention will be described below. 1 and 2 are explanatory diagrams showing the configuration of the present embodiment. 1 is a raw water chamber 3 and a treated water chamber 4
Is a raw water chamber supply / drain port for supplying / draining water to / from the raw water chamber 3, and 6 is a treated water chamber supply / drain port for supplying / draining water to / from the treated water chamber 4. In the raw water chamber 3, there are a magnetic powder 7 provided on the supporting material 2 so as to be stratified, and a magnet 8. The treated water chamber 4 has a plurality of collision objects 9. In the present embodiment, a mesh of stainless metal fiber is used as the support material 2. For example, a general ceramic sintered body, alumina oxide, polyethylene fiber, polypropylene powder sintered body, cellulose fiber and the like are used. It is also possible to use. Further, as the magnetic powder 7, a powder of ferrite / magnetite, a powder of iron / nickel / chromium, or a rare earth such as neodymium can be used.
The magnet 8 includes a core and a coil.

The operation of the embodiment will be described below. For example, by using a pump (not shown), bath water is guided to the raw water chamber supply / drain port 5 and passed in the direction shown by the arrow in FIG. 1. As a result, the magnetic powder 7 constituting the filtration layer becomes solid particles 10 in the water.
And the like are captured and filtered. The filtered water passes through the support material 2 and is discharged from the treated water supply / drain port 6. This water has been purified to the extent that it can be reused sufficiently and can be reused as domestic water. When this filtration is repeated, the filtration layer is clogged with impurities such as the solid particles 10. Therefore, when used to some extent, it is necessary to remove impurities attached to the filtration layer. This removal is performed by the backwashing described below.

That is, first, the coil constituting the magnet 8 is energized to magnetize the core, so that the magnetic powder 7 can be attracted by the magnetic force. Thereafter, when water is flowed in the direction indicated by the arrow in FIG. 2, the magnetic powder 7 is separated from the support material 2 and
The impurities such as the solid particles 10 attached to the magnetic powder 7 are also peeled off, and only the magnetic powder 7 is attracted to the magnet 8 as shown in FIG.

That is, when water is passed from the treated water supply / drain port 6, the water that has passed through the support member 2 is washed out of the impurities in the raw water chamber 3 and drained from the raw water supply / drain port 5. This wastewater is to be disposed of outside the system by a method not shown. The impurities such as the solid particles 10 adhered to the surface of the magnetic powder 7 are discarded out of the system together with the waste water. In this manner, when the water flowing into the treated water supply / drainage port 6 is stopped and then the power supply to the coil is stopped,
The magnetic powder 7 separates from the magnet 8, falls by gravity, and is again laminated on the support material 2 to form a filtration layer. What is discharged in the figure is dirt such as the solid particles 10 and the like, which also peels off from the support material 2.

Here, the present invention has the effect of cleaning the support material 2 by having the collision object 9. The colliding object 9 can be used as a physical cleaning power, and is effective for cleaning stubbornly adhered clogged dirt.

That is, the detergency is the impulse applied by the collision object 9 in the treated water chamber 4 as shown in FIG. The impact force is a force caused by vibration transmitted to the support member 2. Although the collision object 9 is moving around at the time of the filtration in FIG. 1, the magnetic powder 7 is firmly layered by the flow on the support member 2, so that there is no obstacle to the filtration.

As described above, according to the present embodiment, the support 2
The magnetic powder 7 layered thereon is used as a filtration layer, and the magnetic force of the magnet 8 during backwashing is used to prevent the magnetic powder 7 from being lost. The powder 7 and the solid particles 10 can be separated and washed.

(Embodiment 2) As shown in FIG. 3, the collision object 9 has a specific gravity smaller than that of water, and is always in contact with the support 2 in the treated water chamber 4. Even when the collision object 9 is moving around due to the flow of the backwash water, the collision object 9 is always substantially in contact with the two support members, so that the efficiency of separation of the solid particles 10 and the like is high. That is, at the time of back washing,
The magnetic powder 7 and the solid particles 10 that are clogged can be peeled over the entire surface in a short time. In addition, since the object 9 floats on the surface of the support 2 in the treated water chamber 4, even if the flow is filtered in the backwashing, the collision object 9 separates from the support 2 and repeatedly hits the support 2 by buoyancy to separate. Is effective. That is, the magnetic powder 7 packed in the support material 2,
The solid particles 10 can be peeled over the entire surface and floated in water.

(Embodiment 3) As shown in FIG. 4, by setting the specific gravity of the collision object 9 larger than that of water,
In the treated water chamber 4, the collision object 9 is separated from the support 2. This shows the state at the time of filtration. That is, although not shown, the collision object 9 is blown up and collides with the support material 2 during backwashing, so that a stronger peeling force is applied. In this embodiment, the specific gravity is slightly larger than that of the water, and the backing water easily hits the support 2. In short, the collision object 9 is blown up and collided with the support material 2 at the time of the backwash, so that the magnetic powder 7 and the solid particles clogged in the support material 2 are strongly separated even if they are stubbornly adhered or caught. Things.

(Embodiment 4) As shown in FIG. 5, a grid 11 smaller than the collision object 9 is provided in the water supply / drain port 6 of the treated water chamber 4, so that the collision object 9 is not subjected to any backwash water flow or filtration. There is no loss in the water flow. Example 3
In FIG. 4, the water supply / drainage port 6 of the processing chamber is narrowed to
But the drawback is that resistance is high.

Although not shown in FIG.
Since the magnets 8 themselves are made of a magnetic material, the magnets 8 can strongly collide with the support member 2 and the efficiency of cleaning can be greatly improved. The operation will be described with reference to FIG. 5, in which the collision object 9 is a magnetic material. When the magnet 8 is operated in this state, the collision object 9 is attracted by the magnet 8 and strongly collides with the support member 2 in a state as shown in FIG. The support material 2 vibrates due to the collision force, and the solid particles 10 are easily emitted. If the magnetic force is cut off, the collision object 9 falls again as shown in FIG. By repeating this arbitrarily, it is possible to sufficiently clean the clogging.

(Embodiment 5) As shown in FIG. 6, the collision object 9 has a structure having a projection 12 on its surface. As the force of the projection 12 hitting the support member 2, the force per unit area increases, and the impact force on the hitting portion can be increased.
As a result, the effect of removing solid particles in the clogged portion can be increased. In addition, the protrusions 12 can keep an appropriate distance between the collision objects 9. This has two advantages. One of the advantages is that the collision objects 9 do not stick to each other, and do not hinder individual movements for achieving the effect of the collision objects 9. Another advantage is that the backwash water can flow evenly throughout the support due to the gaps, which is important for cleaning the entire support.

Although not shown in the figure, the surface of the collision object 9 is subjected to an antibacterial treatment, thereby
The surface has an antibacterial effect and does not cause slime due to bacteria, and the cleaning effect of the collision can be maintained for a long time. Also, each time the collision objects 9 collide with each other, the antibacterial agent is scraped little by little, and the antibacterial action spreads to the treated water chamber, the raw water chamber, and the support material. When bacteria grow on a support material or the like, they are attached together with the solid particles and magnetic powder due to the slimming, and are difficult to wash. However, since the bacteria can be prevented, the effect is great.

(Embodiment 6) As shown in FIG. 7, the provision of the stirring means 13 in the treated water chamber 4 allows the collision object 9 to be intentionally moved at any time, resulting in a large cleaning effect. In the present embodiment, the stirring blades 14 are used as the stirring means 13, but since the effect of the collision object 9 depends on how much the collision is made, the effect of using this means is great.

That is, the most effective impact is applied to the support member 2 to more effectively separate the solid particles 10 adhered firmly.

As described above, according to the present invention, the solid particles 10 adhered to the support material 2 can be peeled off by the collision object 9 and washed, thereby realizing a filter which can be used repeatedly over a long period of time.

This effect can be achieved by ultrasonic cleaning or forced vibration, but requires a complicated mechanism and power, and cannot be a simple and inexpensive structure as in the present invention. That is, the present invention has a great advantage that the maximum effect can be obtained with a very simple configuration.

[0034]

According to the present invention, magnetic particles and solid particles clogged in the support material can be peeled off by having the colliding object in the treatment water chamber, and the clogging of the support material can be eliminated. This realizes a filter that can be easily performed.
Thereby, stable filtration performance can be maintained over a long period of time, and the filter can be provided without maintenance. In addition, a complicated mechanism is not required, and a simple and cost-free configuration can be achieved. That is, the present invention has a great advantage that the maximum effect of cleaning the support material can be obtained with a very simple configuration.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a filter according to an embodiment of the present invention at the time of filtration.

FIG. 2 is a cross-sectional view showing the configuration in the backwashing state.

FIG. 3 is a diagram showing a configuration in which the colliding object moves around the bottom surface of the treated water chamber with a small specific gravity.

FIG. 4 is a diagram showing a state in which the colliding object is sinking at the bottom of the treated water chamber with a specific gravity.

FIG. 5 is a cross-sectional view showing a configuration in which a lattice is provided.

FIG. 6 is a diagram showing a collision object having a protrusion.

FIG. 7 is a sectional view showing the structure of the stirring means.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 casing 2 support material 3 raw water chamber 4 treated water chamber 5 raw water chamber supply / drain port 6 treated water chamber suction / drain port 7 magnetic powder 8 magnet 9 colliding object 10 solid particles 11 lattice 12 protrusion 13 stirring means 14 stirring blade

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B01D 29/38 580G 35/06 B (72) Inventor Takayuki Inoue 1006 Odakadoma, Kadoma City, Osaka Matsushita Electric Industrial Incorporated F term (reference) 4D019 AA03 BA02 BA06 BB12 BB15 BC06 BC20 CB02 CB09

Claims (8)

[Claims] 1. A raw water chamber and a treated water chamber are provided with a supporting material interposed therebetween, and both the raw water chamber and the treated water chamber have a water supply / drain port through which water flows or drains, and the raw water chamber and the treated water chamber are stratified on the supporting material in the raw water chamber. A magnetic powder, a magnet, and a plurality of colliding objects on the inside of the treated water chamber. 2. The filter according to claim 1, wherein the specific gravity of the colliding object is smaller than the specific gravity of water. 3. The filter according to claim 1, wherein the specific gravity of the colliding object is larger than the specific gravity of water. 4. The filter according to claim 3, wherein a grid having a smaller diameter than a collision object is provided at a supply / drain port of the treated water chamber. 5. The filter according to claim 1, wherein the colliding object is a magnetic material. 6. The filter according to claim 1, wherein the collision object is a collision object having a projection on its surface. 7. The filter according to claim 1, wherein the collision object is a collision object whose surface is subjected to antibacterial treatment. 8. The method according to claim 1, wherein a stirring means is provided in the treated water chamber.
The filter as described.