JP2001340717A - Filter and water purifying system utilizing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter which can improve transparency of water by ozone purification at low cost and to provide a water purifying system utilizing the filter. SOLUTION: The water purifying system is provided with a water conveying pump 13, constituting an ozone supply means for supplying ozone water 3 to water 1 in a pool 100 is constituted of, an ejector 14, an ozone generator 15, a dissolving tank 16 or the like, a sand filter 12 provided at an upstream side of the ozone supply means and a filter unit 20 which incorporates the filter 21 provided with a filter layer 22 made of any among polyvinylidene chloride, polyvinyl chloride and silica series ceramics and makes the water 1 supplied with the ozone water 3 pass through the filter 21 and return to the pool 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter and a water purifying system using the same, and is particularly effective when applied to purify water with ozone.

[0002]

2. Description of the Related Art FIG. 9 shows a conventional water purification system for purifying water in a pool with ozone.

As shown in FIG. 9, a water pump 111 for feeding water 1 in the pool 100 is connected to the pool 100 via a hair remover (hair catcher) 100a. The water supply port of the water supply pump 111 is connected to a water reception port of the sand filter 112. The water outlet of the sand filter 112 is
The pool 100 has been contacted.

[0004] In the vicinity of the water inlet of the sand filter 112, a water inlet of a water pump 113 is connected. Water pump 1
The water outlet 13 is connected to a water inlet of the ejector 114. An ozone generator 115 for generating and sending the ozone gas 2 is connected to a gas receiving port of the ejector 114. The delivery port of the ejector 114 is
6 water receiving ports. The water supply port of the dissolution tank 116 is connected to the vicinity of the water reception port of the sand filter 112.

In such a conventional water purification system, the water supply pump 111 is operated and the ozone generator 1 is operated.
When the 15 is operated, the water 1 in the pool 100 is
After the hair is removed at 00 a, it is fed into the sand filter 112 to remove insolubles (size: 15 to 20 μm or more), sent out from the sand filter 112, and returned to the pool 100.

At this time, part of the water 1 from which the insoluble matter has been removed by the sand filter 112 is supplied to the ejector 114 by the water supply pump 113, and the ozone gas 2 generated by the ozone generator 115 is sucked into the ejector 114. The water is fed into the dissolving tank 116 while being embraced, and is mixed with the ozone gas 2 to form ozone water 3, which is added to the water 1 before being fed to the sand filter 112.

The ozone water 3 sterilizes the water 1 sent from the pool 100, decomposes organic matter removed by the sand filter 112, and consumes ozone gas 2 when sent from the sand filter 112. Clean water 1
Becomes

That is, when sterilizing the water 1 in the pool 100 with ozone, the water 1 of the pool 100 is used as a solvent for the ozone gas 2 and the water is passed through the sand filter 112 to avoid wasteful consumption of the ozone gas 2. The ozone gas 2 is dissolved in the water 1 and the ozone water 3 is added to the water 1 before being sent to the sand filter 112 in order to prevent the ozone gas 2 from leaking into the pool 100 at a certain value or more. The ozone gas 2 is consumed in the sand filter 112.

Therefore, according to such a water purification system, the water 1 in the pool 100 can be efficiently sterilized with the ozone gas 2 and the ozone concentration of the water 1 in the pool 100 is suppressed to a certain value or less. Since it can be easily performed, the amount of the chlorine agent for disinfection added to the water 1 can be greatly reduced.

[0010]

In recent years, the water 1 used in the pool 100 has been required to have higher transparency. However, the sand filter 112 as described above can only remove insoluble matter having a size of about 15 to 20 μm.

Therefore, it is conceivable to use a polypropylene filter capable of removing insoluble matter having a size of up to about several μm. However, this filter has low ozone resistance and deteriorates in a short period of time. I couldn't. Therefore, it is necessary to use a filter made of stainless steel, alumina-based porous ceramics, or fluororesin, which is very expensive while having ozone resistance, which leads to an increase in equipment cost.

Such a problem is not limited to the system for purifying the water 1 in the pool 100 with ozone, but may be any water purifying system for purifying water with ozone and increasing the transparency of the water. As well.

In view of the above, an object of the present invention is to provide a filter capable of increasing the transparency of water purified by ozone at low cost and a water purification system using the filter.

[0014]

According to a first aspect of the present invention, there is provided a filter for purifying water by allowing water to pass through a filter layer, wherein the filter layer comprises: A core tube having a hole formed in the peripheral surface so as to communicate the inside and the outside, and a filter fiber made of any one of polyvinylidene chloride, polyvinyl chloride, and silica-based ceramic wound around the core tube And characterized in that:

According to a second aspect of the present invention, there is provided the filter according to the first aspect, wherein the filter fibers protrude end portions of short fibers made of any of polyvinylidene chloride, polyvinyl chloride, and silica-based ceramics. The short fibers are twisted into long fibers so as to have a tentacle portion.

According to a third aspect of the present invention, in the filter according to the first or second aspect, the filter fiber is helically wound around the core tube.

On the other hand, a water purification system according to a fourth aspect of the present invention for solving the above-mentioned problems includes an ozone supply means for supplying ozone to water, and a filter according to any one of the first to third aspects. A filter unit for transmitting the water supplied with ozone through the filter.

A water purification system according to a fifth aspect of the present invention comprises:
A fourth invention is characterized in that a sand filter is provided on the upstream side of the ozone supply means.

A water purification system according to a sixth aspect of the present invention comprises:
In the fourth or fifth invention, an ozone concentration detecting means provided downstream of the filter unit and detecting an ozone concentration in the water, and the ozone supply means based on a signal from the ozone concentration detecting means. And control means for controlling the ozone supply amount.

A water purification system according to a seventh aspect of the present invention comprises:
In any of the fourth to sixth inventions, the water is used in a pool.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a filter according to the present invention and a water purification system using the same will be described below, but the present invention is not limited to these embodiments.

[First Embodiment] FIG. 1 shows a first embodiment in which a filter and a water purification system using the filter according to the present invention are applied to the purification of pool water.
This will be described with reference to FIGS. 1 is an overall schematic configuration diagram of a water purification system, FIG. 2 is a schematic configuration diagram of a filter, and FIG.
FIG. 3 is an enlarged view of extraction of the filter fiber of FIG. 2.

As shown in FIG. 1, the water purification system according to the present embodiment has a water supply pump 13, an ejector 14, an ozone generator 15, and an ozone supply means for supplying ozone water 3 to water 1 in a pool 100. A dissolving tank 16 and the like, a sand filter 12 provided on the upstream side of the ozone supply means,
A filter 21 (see FIG. 2) having a filter layer 22 made of any one of polyvinylidene chloride, polyvinyl chloride, and silica-based ceramics is incorporated therein, and the water 1 supplied with the ozone water 3 is supplied to the filter 21. A filter unit 20 for allowing the light to pass through and return to the pool 100.

More specifically, as shown in FIG.
00 is connected to a water supply pump 11 that sends out water 1 in the pool 100 via a hair remover (hair catcher) 100a. The water inlet of the water pump 11 is connected to the water inlet of the sand filter 12. The water inlet of the sand filter 12 is connected to the water inlet of the filter unit 20 (details will be described later). The water inlet of the filter unit 20 communicates with the pool 100.

In the vicinity of the water inlet of the sand filter 12, a water inlet of a water pump 13 is connected. The water supply port of the water supply pump 13 is connected to a water receiving port of the ejector 14. An ozone generator 15 that generates and sends out the ozone gas 2 is connected to a gas receiving port of the ejector 14. The outlet of the ejector 14 is connected to a water receiving port of the dissolving tank 16. The water supply port of the dissolving tank 16 is connected near the water receiving port of the filter unit 20.

The filter unit 20 has a filter 21 as shown in FIG. This filter 21 is a skeleton-type core tube 22 having a large number of honeycomb-shaped holes formed on the peripheral surface so as to communicate the inside and the outside.
And the filter layer 2 wound around the core tube 22
3 is provided.

The filter layer 23 is formed by helically winding a filter fiber 23a made of any one of polyvinylidene chloride, polyvinyl chloride, and silica-based ceramic around the core tube 22. The filter fiber 23a is formed by shaping a silica-based ceramic into a long fiber shape, or, as shown in FIG. 3, a short fiber 23aa (one of polyvinylidene chloride, polyvinyl chloride, and silica-based ceramic). The short fiber 23aa is twisted so as to have a tentacle portion 23ab with a protruding end portion (length: about 10 cm), that is, so as to have a so-called "fluff", and finished in a long fiber shape. .

In the filter unit 20 incorporating such a filter 21, when the water 1 flows into the filter unit 20, the water 1 passes through the filter layer 23 from the outside to the inside of the filter 21. By flowing through, the insoluble matter (size: 2 to 5 μm or more) flows into the core tube 22 while being removed by the filter layer 23, and is sent out from the filter unit 20.

At this time, the tentacle portion 23ab of the filter fiber 23a of the filter layer 23 reliably captures the insoluble matter in the water 1, so that the transparency of the water 1 can be more reliably increased.

In such a water purification system, when the water supply pump 11 is activated and the ozone generator 15 is activated, the water 1 in the pool 100 is depilated by the depilation device 100a, To remove the insoluble matter (size: 15-20 μm or more)
Sent from.

A part of the water 1 sent from the sand filter 12 is supplied to an ejector 14 by a water supply pump 13, and the ozone gas 2 generated in the ozone generator 15 is sucked into the ejector 14 and dissolved therein. The ozone water 3 is fed into the tank 16 and mixed with the ozone gas 2.
Thus, the remaining water 1 sent from the sand filter 12
Is returned to.

Water 1 partially returned as ozone water 3
Is supplied into the filter unit 20 while being sterilized by the ozone gas 2 and passes through the filter 21 as described above, so that insoluble matter (size: 2 to 5)
(μm or more), and at the same time, the ozone gas 2 decomposes organic matter attached to the filter 21 and regenerates the filter 21 to be consumed. Water 1 is returned from the filter unit 20 into the pool 100.

Here, the filter 21 includes a filter layer 23
Uses fibers made of any of polyvinylidene chloride, polyvinyl chloride, and silica-based ceramics, so it has high ozone resistance, can be used for a long time, and can greatly reduce costs. (About 10 to 20% of other ozone resistant filters).

Therefore, the transparency of the water 1 in the pool 100 purified by ozone can be increased at low cost.

The ozone water 3 is supplied to the filter unit 20.
To perform the regeneration process of the filter 21,
An increase in pressure applied to the filter 21 can be suppressed. Specifically, as shown in FIG.
When the water 1 is fed to the filter unit 20 without adding water, the pressure applied to the filter 21 gradually increases and a large load is applied to the filter 20. However, when the ozone water 3 is added to the water 1, In addition, the organic matter adhering to the filter 21 is decomposed and the pressure applied to the filter 21 is returned to near the initial magnitude, thereby suppressing an increase in load.

As a material of the filter fiber 23a, silica-based ceramics is preferable to polyvinylidene chloride or polyvinyl chloride because insolubles having a smaller particle diameter can be removed. This is because silica-based ceramic fibers have a higher surface frictional resistance than polyvinylidene chloride fiber or polyvinyl chloride fiber, so that the filter fiber 23a can be wound around the core tube 22 at a high density by closing the gap. It is thought that it is possible.

The tentacles 23 are formed by twisting the short fibers 23aa.
When tailoring into a long fiber shape having ab, it is better to use polyvinylidene chloride or polyvinyl chloride than silica-based ceramics. This is because when polyvinylidene chloride or polyvinyl chloride is used, a sufficient effect can be obtained by using long fibers prepared by twisting the short fibers 23aa and having the tentacles 23ab, but silica is used. In the case where a base ceramic is used, a sufficient effect can be obtained simply by using a long fiber that is formed by twisting the short fiber 23aa and having a tentacle portion 23ab, instead of using a long fiber. Because it can be.

Further, as silica-based ceramics, S
It contains iO ₂ as a main component and further contains Al ₂ O ₃ , Na ₂ O and the like, and particularly preferably contains 90% or more of SiO ₂ .

[Second Embodiment] FIG. 5 shows a second embodiment in which the filter and the water purification system using the filter according to the present invention are applied to the purification of pool water.
This will be described with reference to FIG. FIG. 5 is an overall schematic configuration diagram of the water purification system. However, the same members as those in the first embodiment described above are denoted by the same reference numerals as those used in the description of the first embodiment, and the description thereof is omitted.

As shown in FIG. 5, the water purification system according to the present embodiment has a water supply pump 13, an ejector 14, an ozone generator 15, and an ozone supply means for supplying ozone water 3 to the water 1 in the pool 100. A dissolution tank 16 and the like, and a sand filter 12 provided upstream of these ozone supply means.
And a filter 21 (see FIG. 2) having a filter layer 22 made of any one of polyvinylidene chloride, polyvinyl chloride, and silica-based ceramics.
A filter unit 20 that allows the water 1 supplied with the water 1 to pass through the filter 21 and returns the pool 1 to the pool 100, and ozone which is provided downstream of the filter unit 20 and serves as an ozone concentration detecting means for detecting the ozone concentration in the water 1. Sensor 17
And a control device 18 as control means for controlling the supply amount of the ozone gas 2 from the ozone generator 15 based on a signal from the ozone sensor 17.

Specifically, as shown in FIG. 5, an ozone sensor 17 for detecting the concentration of ozone in the water 1 is attached to the outlet of the filter unit 20. The ozone sensor 17 is electrically connected to the control device 18. The controller 18 is electrically connected to the ozone generator 15, and based on a signal from the ozone sensor 17, controls the ozone gas 2 from the ozone generator 15.
Can be controlled.

In the present embodiment, when the ozone concentration of the water 1 sent from the filter unit 20 exceeds a specified value for some reason, the control device 18 determines the ozone concentration based on the signal from the ozone sensor 17. , Ozone generator 1
By controlling the supply amount of the ozone gas 2 generated from the filter 5, the ozone concentration of the water 1 sent from the filter unit 20 can be returned to a specified value or less.

Therefore, according to this embodiment, it is possible to obtain the same effect as that of the above-described embodiment, and also, always to keep the ozone concentration of the water 1 in the pool 100 below a certain value. Pool 1 so you can
The security of the water 1 of 00 can be easily ensured.

Further, for example, a monitoring device for monitoring the operation data of the water purification system according to the present invention, the water quality data of the pool 100, or the like is built in the control device 18 or the control device 18
The monitoring device transmits the data and the control signal of the control device 18 to a central management center, a service center, or the like that is located far from the pool 100 and centrally manages the water purification system. It is also possible to provide a function of receiving and transmitting via the Internet or an intranet via a public line or a dedicated line.

Alternatively, for example, the control device 18 is provided in a central control room far from the pool 100, and the control device 18 is connected to the ozone sensor 17, the ozone generator 15, and the like via a communication system such as the Internet. At the same time, the ozone sensor 17 and the ozone generator 15 of the water purification system of the pool 100 in other places are connected to the control device 18 in the same manner, so that the ozone concentration of the water 1 in the plurality of pools 100 can be collectively determined. And can be centrally managed.

In each of the above-described embodiments, a case has been described where the present invention is applied to a system for purifying the water 1 in the pool 100 with ozone. However, the present invention is not limited to this. In the case of a water purification system that aims to be more efficient, it can be applied in the same manner as in each of the above-described embodiments, and the same effects as in the above-described embodiments can be obtained.

[0047]

EXAMPLES In order to confirm the effect of the filter according to the present invention, the following experiment was conducted.

[Experimental method] Polyvinylidene chloride fiber and silica ceramic fiber (composition: SiO ₂ 94.5)
_{%, Al 2 O 3 4.5%} , Na 2 O0.5% or less, other than 0.5%) filter layer using the respective distribution given size of insoluble material was mixed water (10 Liter / min) to determine the removal rate for each size of insoluble matter. The results are shown in FIGS. For the purpose of comparison, the removal rate of each size of the insoluble matter when flowing through a filter layer using a polypropylene fiber and a sand filter was also determined. FIG. 8 shows the result.

[Experimental Results] As shown in FIG. 8, in the sand filter, if the size of the insoluble matter is 50 μm or more, the removal rate is about 100%, but the size of the insoluble matter is 15 μm or less. If so, the removal rate will be about 50% or less. On the other hand, in the filter layer using the polypropylene fiber, the size of the insoluble matter can be removed up to 15 μm with a removal rate of about 100%, and the size of the insoluble matter can be removed up to 5 μm with a removal rate of about 50% or more. Although it can be used, it cannot be used because of its low ozone resistance.

On the other hand, the filter layer using polyvinylidene chloride fiber has ozone resistance and at the same time, as shown in FIG.
%, And the size of insoluble matter can be removed up to 5 μm at a removal rate of about 50% or more. Further, the filter layer using the silica-based ceramic fiber has ozone resistance, and at the same time, as shown in FIG. 7, the size of the insoluble matter can be removed up to 5 μm with a removal rate of about 90% or more. Objects can be removed with a removal rate of about 50% or more up to 2 μm in size.

Therefore, when polyvinylidene chloride fiber is used, small-sized insoluble matters (about 5 μm) can be sufficiently removed while having ozone resistance. When silica-based ceramic fiber is used, ozone resistance is improved. However, it was confirmed that even smaller insolubles (about 2 μm) can be removed to a satisfactory degree.

[0052]

According to a first aspect of the present invention, there is provided a filter for permeating water through a filter layer to purify the water, wherein the filter layer has a hole formed in a peripheral surface thereof so as to communicate between the inside and the outside. A core tube formed with, polyvinylidene chloride wound around the core tube, polyvinyl chloride,
Since it is provided with a filter fiber made of any of silica-based ceramics, it has high ozone resistance and can be used for a long time at low cost, and increases the transparency of ozone purified water at low cost. be able to.

According to a second aspect of the present invention, there is provided the filter according to the first aspect, wherein the filter fibers protrude end portions of short fibers made of any one of polyvinylidene chloride, polyvinyl chloride, and silica-based ceramics. Since the short fibers are twisted into long fibers so as to have a tentacle portion, the transparency of the water purified by ozone can be more reliably increased.

The filter according to the third aspect of the present invention is the filter according to the first or second aspect, wherein the filter fibers are helically wound around the core tube, so that the effects obtained in the first and second aspects of the present invention can be obtained. It can be obtained more reliably.

On the other hand, a water purification system according to a fourth aspect of the present invention includes an ozone supply means for supplying ozone to water, and a filter according to any one of the first to third aspects of the present invention. And a filter unit that transmits the water through the filter, so that the transparency of the water purified by the ozone can be increased at a low cost.

A water purification system according to a fifth aspect of the present invention
In the fourth aspect, since a sand filter is provided on the upstream side of the ozone supply means, ozone can be effectively used for water treatment, and clogging of the filter can be suppressed.

A water purification system according to a sixth aspect of the present invention
In the fourth or fifth invention, an ozone concentration detecting means provided downstream of the filter unit and detecting an ozone concentration in the water, and the ozone supply means based on a signal from the ozone concentration detecting means. Since the control means for controlling the amount of supplied ozone is provided, the ozone concentration of the water can always be suppressed to a certain value or less, and the safety of the water can be easily ensured.

The water purification system according to the seventh aspect of the present invention
In any one of the fourth to sixth inventions, since the water is used in the pool, the amount of the chlorinating agent used for sterilizing the water in the pool can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of a first embodiment when a water purification system according to the present invention is applied to pool water purification.

FIG. 2 is a schematic structural diagram of an embodiment of a filter according to the present invention.

FIG. 3 is an enlarged view of the extraction of the filter fiber of FIG. 2;

FIG. 4 is a graph showing the relationship between the use of ozone and the pressure applied to a filter.

FIG. 5 is an overall schematic configuration diagram of a second embodiment in which the water purification system according to the present invention is applied to pool water purification.

FIG. 6 is a graph showing the relationship between the size of insolubles and the removal rate when polyvinylidene chloride fibers are used for the filter of FIG.

7 is a graph showing the relationship between the size of insolubles and the removal rate when silica-based ceramic fibers are used for the filter of FIG.

8 is a graph showing the relationship between the size of insolubles and the removal rate when polypropylene fibers are used for the sand filter and the filter of FIG.

FIG. 9 is an overall schematic configuration diagram of a conventional system for purifying water in a pool with ozone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water 2 Ozone gas 3 Ozone water 11 Water supply pump 12 Sand filter 13 Water supply pump 14 Ejector 15 Ozone generator 16 Dissolution tank 17 Ozone sensor 18 Controller 20 Filter unit 21 Filter 22 Core tube 23 Filter layer 23a Filter fiber 23aa Short fiber 23ab Tentacle part 100 Pool 100a Hair remover

Claims (7)

[Claims] 1. A filter for permeating water through a filter layer to purify the water, wherein the filter layer has a core tube having a hole formed in a peripheral surface so as to communicate an inside and an outside, and Polyvinylidene chloride wrapped around the core tube,
A filter comprising: a filter fiber made of any one of polyvinyl chloride and silica-based ceramics. 2. The filter fiber according to claim 1, wherein the filter fiber has a tentacle portion formed by projecting an end of a short fiber made of any one of polyvinylidene chloride, polyvinyl chloride, and silica-based ceramics. A filter characterized in that fibers are twisted into long fibers. 3. The filter according to claim 1, wherein the filter fibers are helically wound around the core tube. 4. An ozone supply means for supplying ozone to water, and a filter unit having a built-in filter according to any one of claims 1 to 3, wherein the filter unit transmits the water supplied with ozone through the filter. A water purification system, comprising: 5. The water purification system according to claim 4, wherein a sand filter is provided upstream of the ozone supply means. 6. The ozone concentration detecting means provided on the downstream side of the filter unit and detecting an ozone concentration in the water according to claim 4 or 5, based on a signal from the ozone concentration detecting means. A water purification system comprising: a control unit that controls an ozone supply amount from a supply unit. 7. The water purification system according to claim 4, wherein the water is used in a pool.