JPH11244851A - Purifying device and fresh water producing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily supply purified water even in emergency by providing a sterilizing means for obtaining a sterilized water by sterilizing filtrate by a filter for filtering pool water and a hollow fiber membrane module for obtaining the purified water by purifying a part of the sterilized water and circulating the purified water and remaining sterilized water to a pool. SOLUTION: In the case of producing the fresh water for drinking water or domestic water using pool water at the time of emergency such as earth quake, the pool water in the pool 1, after foreign elements are removed by a hair catcher 2, is fed to the inside of a drum 4 of a filter 3 to be separated into a solid component and filtrate. The resultant filtrate is fed to an ultraviolet irradiation device 6 from a reservoir 5, irradiated with ultraviolet ray in the presence of chlorine to oxidation-decompose an organic dissolved component in the filtrate and to be sterilized while decreasing the consumption of permanganic acid. And almost of all sterilized water is returned to the pool 1 through a return pipe 12 and the remaining part is fed to the hollow fiber membrane device 9, where the spore of an algae or the like is removed. The purified water obtained in this manner is taken out to the outside of the system by switching a three way valve 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purification device and a method for producing fresh water. More specifically, the present invention relates to a purification device and a fresh water producing method suitable for producing drinking water and domestic water using pool water in an emergency such as an earthquake.

[0002]

2. Description of the Related Art In recent years, as a device for supplying drinking water or domestic water in the event of a disaster such as an earthquake, a general-purpose device as described in JP-A-9-122654 and JP-A-9-220558 has been proposed. There is a water machine. These water purifiers purify raw water taken from a water source to provide drinking water and domestic water. A pool can be used as a water source.

[0003] The water in the pool contains fine particles such as mud, silica, and cosmetic powder, as well as dissolved components of organic matter originating from the human body such as sweat, manure, saliva and algae. Therefore, the pool is usually provided with a purification device for removing them. For example, a material subjected to an oxidation treatment or a material using a hollow fiber membrane is used.

[0004] However, in order to use the pool water purified by such a device as a water source for a fresh water generator, the fresh water generator must be transported to the pool side and set. Therefore, even in an emergency such as a disaster, preparations are troublesome, and drinking water or the like cannot be easily obtained.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a purification apparatus and a fresh water producing method capable of easily supplying purified water even in an emergency without complicated settings.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a filter for filtering pool water, sterilizing means for sterilizing filtered water from the filter to obtain sterilized water,
A purifying apparatus provided with a hollow fiber membrane module that purifies at least a part of sterilized water to obtain purified water, a water supply unit that supplies purified water to the outside of the system, and a unit that circulates purified water and remaining sterilized water to a pool. It is a feature.

Here, the filter is a rotary drum type filter, the water supply means includes a faucet, and the water supply means has a water purifier including activated carbon and a hollow fiber membrane. It is preferable to include a water inlet and a domestic water inlet. It is also preferable that the sterilizing means includes means for irradiating ultraviolet rays in the presence of chlorine, and that a hair catcher is provided in a stage preceding the filter.

[0008] Further, the present invention for achieving the above object provides a method of filtering pool water, sterilizing the filtered water, filtering at least a part of the sterilized water through a hollow fiber membrane to obtain purified water, and then purifying the purified water. It is characterized by a method of making fresh water by supplying water outside the system or circulating it to the pool together with the remaining sterilized water.

At this time, a rotary drum type filter is used for filtering the pool water, at least a part of the purified water to be supplied to the outside of the system is filtered with activated carbon and a hollow fiber membrane into drinking water, and the remainder is used as domestic water. Is preferred. It is also preferable to add chlorine to the filtered water and sterilize it by irradiating ultraviolet rays, or to filter the pool water after removing the hair in the pool water.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The fresh water generator of the present invention shown in FIG.
A rotary drum type filter 3 for filtering pool water extracted from the bottom of the pool 1, an ultraviolet irradiation device 6 for sterilizing the filtered water to obtain sterilized water, and a hollow fiber for purifying at least a part of the sterilized water. Membrane filtration device 9 and faucet 2 for supplying purified water obtained by the hollow fiber membrane filtration device 9 to the outside of the system
2 is provided.

In front of the rotary drum type filter 3, a butterfly valve 13 for adjusting the flow rate and a hair catcher 2 for removing relatively large impurities such as hair, lint, bandage and the like with a wire mesh are provided. I have.

A rotary drum type filter 3 as a filter is
A rotary drum 4 around which a filter cloth is wound, which filters a solid component having a size of 5 μm or more in the supplied pool water, a receiving tank 5 for the filtered water that has passed through the filter cloth, and filtered water for discharging the separated solid component. 14 and nozzle 1 for circulating part of
5 and a solid component drain pipe 16. It is preferable to use the rotary drum type filter 3 because the filter cloth can be continuously operated for a long period of time while preventing clogging of the filter cloth.

The ultraviolet irradiation device 6 is provided with a chlorine supply device 7 and an ultraviolet lamp 17 to sterilize the filtered water obtained from the rotary drum type filter 3 by irradiating ultraviolet light in the presence of chlorine.
And an ultraviolet lamp is immersed in an open tank or a closed reaction tube. And the chlorine supply device 7
In order to maintain the chlorine concentration in the pool water at a specified concentration, the chlorine concentration in a reflux pipe described later is detected and automatically added. A pump 8 for supplying sterilizing water to the hollow fiber membrane filtration device 9 and the pool is provided downstream of the ultraviolet irradiation device 6.

The hollow fiber membrane filtration device 9 is provided with a hollow fiber membrane for performing fine filtration of about 0.3 μm or more, such as fine solid components and algae spores, contained in cosmetics. A backwashing mechanism is provided so that the hollow fiber membrane can be washed by flowing back the purified water. The backwashing mechanism includes a tank 19 for storing purified water that has been microfiltered by the hollow fiber membrane, and a pump 20 for feeding the purified water to the hollow fiber membrane at regular intervals to backwash.

A three-way valve 10 for switching a water supply port and a flow path to a pool, and a branch pipe having a water supply port for supplying purified water obtained by the hollow fiber membrane filtration device 9 are provided downstream of the hollow fiber membrane filtration device 9. A reflux pipe 11 is provided for circulating sterilized water to a pool without supplying purified water to a water supply port.
The water supply port includes a domestic water supply port for providing purified water as domestic water, and a drinking water supply port provided with a water purifier 23 for removing chlorine odor of purified water and supplying it as drinking water. In order to remove impurities such as chlorine, musty odor, and other organic chlorine-based compounds and fine particle components, the water purifier 23 is preferably a cartridge formed of a filter material made of activated carbon and a hollow fiber membrane.

By providing a water supply port for purified water obtained by treating pool water and a reflux pipe to the pool, drinking water and daily water can be easily obtained from the pool water without separately preparing a fresh water generator. In addition, by dividing the water supply port into two and providing the water purifier 23 on one side, it is possible to separately obtain domestic water and drinking water from which chlorine odor has been removed even in an emergency or the like. Further, it is preferable that a water tap 22 is attached to the water supply port so that a desired amount of purified water can be obtained when necessary.

In such a purification device, the pool water drawn from the bottom of the pool 1 is used to remove relatively large impurities such as hair and lint by the hair catcher 2 and then to remove the water from the rotary drum type filter 3. It is continuously fed inside the rotating drum 4. The pool water sent was 5 μm depending on the filter cloth attached to the drum 4 and the head difference.
It is separated into the above solid components and filtered water. The solid component adheres to the filter cloth, and the filtered water passes through the filter cloth and is received in the receiving tank 5.

The filter cloth to which the solid component adheres is periodically washed using a part of the filtered water. A part of the filtered water received in the receiving tank 5 is periodically pumped up by a pump 14, and the filtered water is sprayed from a nozzle 15 onto a filter cloth mounted on a rotating drum 4 to wash out solid components. Cleaning drainage is drainage pipe 16
From the system.

The filtered water not used for washing is sent from the receiving tank 5 to the ultraviolet irradiation device 6 and irradiated with ultraviolet light in the presence of chlorine. By irradiating ultraviolet rays, the dissolved components of organic substances, nitrate nitrogen, nitrite nitrogen, etc., remaining in the filtered water are oxidized and decomposed, and the permanganic acid consumption of the filtered water, which is a pollution index in the water quality control items, is reduced. Reduce and sterilize. At this time, chlorine promotes decomposition, but the chlorine concentration in the reflux pipe is automatically measured to determine and add the amount of chlorine so that the chlorine concentration in the pool water is maintained at a specified concentration.
On the other hand, ultraviolet rays have a wavelength of 184.9 nm or 253.7 nm and an irradiation amount of 5,000 to 100,000 μW · sec / cm ^{2 in} order to effectively decompose and sterilize organic substances.
It is preferred that it is about.

Most of the sterilized water obtained by irradiating the ultraviolet rays is returned to the pool by the pump 8 through the reflux pipe 12. The remaining part of the sterilized water is supplied to the hollow fiber membrane filtration device 9.
To remove fine solid components and algal spores exceeding 0.3 μm contained in cosmetics.

The hollow fiber membrane to which the removed fine solid components and the like adhere is backwashed by storing purified water in a tank 19 and periodically sending the purified water to the hollow fiber membrane by a pump 20. The water used for the backwash is discharged from the drain pipe 21 to the outside of the system.

By switching the three-way valve 10 of the purified water obtained by the treatment with the hollow fiber membrane filtration device 9, water supply to the outside of the system as domestic water or drinking water or reflux to the pool is selected. When provided outside the system as drinking water, the treatment may be carried out in the water purifier 23, but may be boiled for about 15 minutes.

[0023]

According to the present invention, a purifying apparatus provided with a water supply means for supplying purified water obtained by treating pool water to the outside of the system and a means for circulating sterilized water to the pool is provided.
Even if the supply of tap water stops in a disaster or the like, the pool water can be easily purified and supplied as domestic water or drinking water without complicated settings. Therefore, there is no need to separately install a disaster desalination machine, and no special management is required as a purification device.

At this time, if a faucet is provided in the water supply means, a desired amount of purified water can be supplied when necessary.
The limited pool water can be used effectively. Also,
When the water supply means is divided into a drinking water supply port provided with a water purifier using activated carbon and a hollow fiber membrane as a filter medium and a domestic water supply port, purified water can be selected according to the intended use.

When the pool water is filtered by a rotary drum type filter, clogging of the filter cloth is prevented to enable continuous operation for a long time, and chlorine is added to the filtered water to irradiate ultraviolet rays. In this case, dissolved components of organic matter and nitrate nitrogen and nitrite nitrogen remaining in the filtered water can be rapidly oxidized and decomposed to reduce permanganic acid consumption of the filtered water and sterilize. .

Further, by providing a hair catcher in front of the filter, relatively large impurities such as hair can be removed, and clogging of the filter cloth can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic flowchart of a purification device according to an embodiment of the present invention.

[Explanation of symbols]

 1: Pool 2: Hair catcher 3: Rotary drum type filter 4: Drum 5: Receiving tank 6: Ultraviolet irradiation device 7: Chlorine supply device 8: Pump 9: Hollow fiber membrane filtration device 10: Three-way valve 11: Branch pipe 12: Reflux pipe 13: Butterfly valve 14: Pump 15: Nozzle 16: Drain pipe 17: Ultraviolet lamp 18: Check valve 19: Tank 20: Pump 21: Drain pipe 22: Water faucet 23: Water purifier

────────────────────────────────────────────────── ─── front page continued (51) Int.Cl. ⁶ identifications FI C02F 1/50 520 C02F 1/50 531M 531 550H 550 560B 560 560C 560E 560Z 1/76 a 1/76 9/00 502D 9/00 502 502E 502N 504E 504 B01D 35/02 Z

Claims (11)

[Claims] 1. A filter for filtering pool water, sterilizing means for sterilizing filtered water from the filter to obtain sterilized water,
A hollow fiber membrane module that purifies at least a portion of the sterilized water to obtain purified water, a water supply unit that supplies the purified water to the outside of the system, and a unit that circulates the purified water together with the remaining sterilized water to a pool. Purifying equipment. 2. The purification device according to claim 1, wherein the filter is a rotary drum type filter. 3. The purification device according to claim 1, wherein the water supply means includes a faucet. 4. The purification device according to claim 1, wherein the water supply means includes a drinking water supply port having a water purifier including activated carbon and a hollow fiber membrane, and a domestic water supply port. . 5. The purifying apparatus according to claim 1, wherein said sterilizing means includes means for irradiating ultraviolet rays in the presence of chlorine. 6. A hair catcher is provided upstream of the filter.
The purification device according to claim 1. 7. The pool water is filtered, the filtered water is sterilized, and at least a part of the sterilized water is filtered through a hollow fiber membrane to obtain purified water, and then the purified water is supplied outside the system or the remaining sterilized water is supplied. A fresh water method characterized by being circulated to a pool together with the water. 8. The fresh water producing method according to claim 7, wherein a rotary drum type filter is used for filtering the pool water. 9. The fresh water producing method according to claim 7, wherein at least a part of the purified water to be supplied to the outside of the system is filtered with activated carbon and a hollow fiber membrane to obtain drinking water, and the remainder is used as domestic water. 10. The fresh water producing method according to claim 7, wherein chlorine is added to the filtered water and sterilized by irradiating ultraviolet rays. 11. The fresh water producing method according to claim 7, wherein the pool water is filtered after removing the hair in the pool water.