JP2012217975A - Water treatment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment system which can remove impurities contained in raw water when using tap water, well water, rain water or the like as the raw water, therefore, can secure good quality of water as drinking water and daily life water even when safe water is difficult to be secured upon natural disaster or the like, and can reduce the amount used of detergent and can efficiently use daily life water.SOLUTION: The water treatment system comprises: (a) a raw water tank for storing raw water; (b) a water cleaning part which includes a pretreatment filter, a pretreatment carbon filter, a water demineralizing filter (ion exchange membrane), a reverse osmosis membrane filter and a posttreatment carbon filter, connected in series, and cleans water in the raw water tank; (c) a clean water utilizing part which uses water in the water cleaning part as indoor daily life water; (d) a clean water and discharge water supplying pipe which supplies discharge water of the reverse osmosis membrane filter to the raw water tank or a discharge water tank; and (e) a clean water and discharge water utilizing part which uses water in the discharge water tank for daily life water separate from the clean water utilizing part.

Description

  The present invention relates to a water treatment system for domestic water using a reverse osmosis membrane.

In recent years, an increasing number of households attach a water purifier to tap water in view of taste and user health in domestic water and drinking water. Moreover, when domestic water and drinking water are polluted by natural disasters and it is difficult to secure safe water, it has been required to secure domestic water and drinking water that can be used with confidence.
In order to solve these problems, (Patent Document 1) states that “at least each of the activated carbon filter, the reverse osmosis membrane filter, and the ion exchange membrane filter is placed inside a cylindrical body made of a material having antirust performance. A water purifier in which a water storage tank for storing purified water treated through the filter is installed behind the three cylindrical bodies and purified water is supplied from a water supply port provided with a backflow prevention valve ”. It is disclosed.

JP 2008-272893 A

However, the above conventional techniques have the following problems.
(1) Since the technology disclosed in (Patent Document 1) includes a water supply port, it cannot be used unless the water purifier is located, and is not convenient for use as domestic water. Had.

  The present invention solves the above-described conventional problems, and uses tap water, well water, rainwater, etc. as raw water, inorganic substances such as chlorine contained in the raw water, organic substances such as dioxins and agricultural chemicals, radioactive substances, impurities such as bacteria and viruses. As it is difficult to secure safe water during natural disasters, etc., it is possible to obtain high-quality pure water as drinking water or water for daily use, and the amount of detergent used is good because of the bubbling of detergent etc. An object of the present invention is to provide a water treatment system that can efficiently use domestic water.

In order to solve the above conventional problems, the water treatment system of the present invention has the following configuration.
The water treatment system according to claim 1 of the present invention includes (a) a raw water tank for storing raw water, (b) a pretreatment filter chamber in which the raw water tanks are connected in series, and a pretreatment carbon filter chamber. And a water purification filter (ion exchange membrane) chamber, a reverse osmosis membrane filter chamber, and a post-treatment carbon filter chamber, wherein the filters in each filter chamber are detachably provided and purify the raw water And (c) a water purification utilization unit that uses the water of the water purification unit as indoor domestic water, (d) a purified water drainage supply pipe that sends the drainage of the reverse osmosis membrane filter to the raw water tank or the drainage tank, and (e ) It has a configuration comprising a purified water drainage utilization unit that uses the water in the drainage tank for domestic water different from the purified water utilization unit.
With this configuration, the following effects can be obtained.
(1) Since a reverse osmosis membrane filter is provided, fine impurities such as radioactive substances, dioxins, agricultural chemicals, and viruses can be removed, and safe daily water can be obtained.
(2) By providing a pretreatment filter or a pretreatment carbon filter, chlorine, iron rust, bacteria, organic matter, etc. can be removed, and the load on the reverse osmosis membrane during filtration can be reduced.
(3) Since the water softening filter is provided, the hardness component can be removed and the water softened, so that foaming of detergent and the like can be improved, and the water can be changed to the water that Japanese people feel most delicious.
(4) Since the post-processing filter is provided, it is possible to remove odor components and the like that cannot be removed by the reverse osmosis membrane filter, and to add a trace amount of minerals.
(5) Since pure water to which a small amount of mineral is added is used, detergent foaming is good and the amount of detergent used can be reduced, so that the environmental burden due to domestic wastewater can be reduced.
(6) Since rainwater, river water, and the like can be used as domestic water, the amount of tap water used can be reduced.
(7) The purified water drained from the reverse osmosis membrane filter can be used as raw water, and the water in the drainage tank can be used for toilet flushing, plant sprinkling, car washing, etc., so it can be used efficiently without wasting water. can do.

As raw water for generating pure water, tap water, well water, rain water, river water, sea water, and the like can be used. When water that cannot be continuously obtained such as rain water is used as raw water, it is desirable to provide a storage tank for storing rain water or the like. In addition, when using tap water or well water, it is desirable to take measures to prevent backflow between the raw water tank.
The raw water tank preferably has a capacity of 40-60 L. As the capacity becomes smaller than 40L, it is not preferable because the possibility of overflowing tends to increase when the supply amount of raw water is larger than the production amount of pure water. Moreover, since it will become difficult to ensure an installation place since a raw | natural water tank will become large as it becomes larger than 60L, it is unpreferable.

As the pretreatment filter, a hollow fiber membrane filter having a pore diameter of 0.01 μm is used, and impurities having a diameter larger than 0.01 μm are removed with chlorine, iron rust, volatile organic substances, suspended substances, and the like. Since chlorine, iron rust, suspended substances, and the like are removed, the load when filtering with a reverse osmosis membrane filter can be reduced, and the life of the reverse osmosis membrane filter can be extended.
The same pretreatment carbon filter and posttreatment carbon filter are used, and an activated carbon filter is used. The pretreated carbon filter is used for removing chlorine, bacteria, organic substances, and the like before passing through the reverse osmosis membrane filter.
The post-treatment carbon filter removes the odor and fine impurities of pure water after passing through the reverse osmosis membrane filter, and adds a trace amount of mineral. Since bacteria and organic substances can be removed, the load when filtering through a reverse osmosis membrane filter can be reduced, the life of the filter can be extended, and minerals can be added to the pure water. It can be made into water with a different taste.
Instead of the post-treatment carbon filter, a silica filter filled with silica stone having a particle diameter of 10 mm to 50 mm may be used. By using a silica filter, the water becomes a molecular level without clustering pure water, and the thermal conductivity is improved, so that a hot spring effect that warms the body from the core can be expected. Further, as a method for adding minerals, deep sea water or bittern components (such as sodium and magnesium) may be added.

As the water softening filter, a cation exchange resin or a cation exchange membrane is used. The water softening filter softens water by replacing hardness components such as magnesium and calcium in the purified water after passing through the pretreated carbon filter with sodium. Since the hardness component is removed by the water softening filter and the purified water is softened, foaming of detergent or the like can be improved.
As the reverse osmosis membrane filter, a reverse osmosis membrane having a pore diameter of about 0.0001 μm and capable of withstanding high pressure is preferably used. Thereby, impurities having a size of 0.0001 μm or more can be removed by radioactive substances, dioxins, agricultural chemicals, viruses and the like. The purified water that passes through the reverse osmosis membrane filter is divided into purified water and pure water by the reverse osmosis membrane, the purified water is sent to the raw water tank or the drain tank, and the purified water stored in the drain tank is used for toilet washing water and plants. Can be used for water spraying, car washing, etc.

Pure water generated from raw water is used as domestic water such as drinking water in laundry, baths, washrooms, kitchens and the like. When pure water from which impurities are removed is used, foaming of detergent and soap is good, so that the amount of detergent used can be reduced and the environmental load due to domestic wastewater can be reduced.
In addition, domestic wastewater with relatively few impurities in water after use such as bath water is purified with a hollow fiber membrane filter, activated carbon filter, etc., and then stored in a reprocessing tank, and the reprocessed water is used as washing water or toilet washing water. It may be used as water for plants, water for car washing, and the like. At this time, it is desirable to perform sterilization with an ultraviolet lamp or the like.

Invention of Claim 2 is the water treatment system of Claim 1, Comprising: The said raw water tank selects the water intake selection for selecting the priority order of the water intake of a rainwater intake part, a well water intake part, and a tap water intake part It has the structure provided with a means.
With this configuration, the following actions are obtained in addition to the actions obtained in the first aspect.
(1) Since the priority of water intake (rain water, well water, tap water, etc.) can be selected, the water intake ratio can be selected according to the location where this water treatment system is used, and water can be used more efficiently. can do.

  As a water intake selection means, a pump or a solenoid valve or the like interlocked with a float or a water level sensor attached inside the raw water tank is used. A pump or solenoid valve is attached to each intake section, and when the water level in the raw water tank rises and the float or water level sensor reacts, the pump that is linked stops or the solenoid valve closes and the supply of raw water stops. Furthermore, by installing multiple floats or water level sensors at different heights, as the water level rises, supply from a supply pipe equipped with a pump or solenoid valve linked to the float or water level sensor installed on the lower side is possible. Since it stops, the priority order in the intake of raw water can be selected.

  The intake section includes a rainwater intake section, a well water intake section, and a tap water intake section, but other water intake sections may be provided as long as they can be used as raw water.

As described above, according to the water treatment system of the present invention, the following advantageous effects can be obtained.
According to claim 1,
(1) A water treatment system that can provide safe water for daily use, such as drinking water, can reduce the environmental load by reducing the amount of detergent used, and can efficiently use water Can be provided.

According to claim 2,
(1) Since the priority of water intake (rain water, well water, tap water, etc.) can be selected, the water intake ratio can be selected according to the location where this water treatment system is used, and water can be used more efficiently. A water treatment system can be supplied.

Conceptual diagram of the water treatment system of Embodiment 1

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
The present invention is not limited to this embodiment.
(Embodiment 1)
FIG. 1 is a conceptual diagram of the water treatment system according to the first embodiment.
In FIG. 1, 1 is a water treatment system according to the first embodiment, and 2 is a raw water tank having a capacity of 40 to 60 L for storing raw water such as tap water, well water, and rain water. The raw water tank 2 is connected to the tap water supply pipe 19a, the well water supply pipe 19b, and the rainwater supply pipe 19c, which are respectively provided from the water supply 8, the well 9, and the rainwater tank 10. Reference numeral 3 denotes a water purification unit that is connected to the raw water tank 2 via the pipe line 19 and purifies the raw water. The water purification unit 3 includes a pretreatment filter chamber 11, a pretreatment carbon filter chamber 12, a water softening filter chamber 13, a reverse osmosis membrane filter chamber 14, and a posttreatment carbon filter chamber 15, and each filter includes a pressure gauge 18. The pipes 19 are connected in series. 4 is a pure water tank having a capacity of 200 to 500 L for storing pure water generated and purified by the water purification unit 3, and 5 is a water purification utilization unit in which pure water in the pure water tank 4 is supplied by the pump 16 and used. Is a drainage tank having a capacity of 80 to 120 L for storing purified water discharged from the reverse osmosis membrane filter chamber 14. The drainage tank 6 is connected to the reverse osmosis membrane filter chamber 14 and the raw water tank 2 by a purified water drainage supply pipe 19d. 7 is a purified water drainage unit that uses the purified water drainage stored in the drainage tank 6, and 17 is a backflow prevention valve provided in the tap water supply pipe 19a and the well water supply pipe 19b so that the raw water in the raw water tank 2 does not flow backward. is there.

Here, although the capacity | capacitance of the raw | natural water tank 2 is based also on the production amount of a pure water, the thing of 40-60L is used suitably. As the capacity becomes smaller than 40L, it is not preferable because the possibility of overflowing tends to increase when the supply amount of raw water is larger than the production amount of pure water. Moreover, since it will become difficult to ensure an installation place since a raw | natural water tank will become large as it becomes larger than 60L, it is unpreferable.
The tap water supply pipe 19a, the well water supply pipe 19b, and the rainwater supply pipe 19c connected to the raw water tank 2 are preferably provided with water supply stop means. As the water supply stop means, an electromagnetic valve, a pump, or the like that moves in conjunction with the vertical movement of the float or the water level sensor provided in the raw water tank 2 can be used. By providing the supply stop means, the raw water tank will not overflow. Further, by providing a supply stop means at the end of the tap water supply pipe 19a, the well water supply pipe 19b, and the rainwater supply pipe 19c on the raw water tank 2 side, the connection positions of the raw water tank 2 are set at different heights, so that the raw water tank It is possible to decide which water is supplied to 2 with priority.
The raw water tank 2 is also supplied with purified water drained from the reverse osmosis membrane filter chamber 14. At this time, the purified water drainage supply pipe 19d that supplies the purified water drainage of the reverse osmosis membrane filter chamber 14 is higher than the connection position of the tap water supply pipe 19a, the well water supply pipe 19b, and the rainwater supply pipe 19c connected to the raw water tank 2. It is desirable to connect to a location. As a result, the purified water drainage is preferentially used as raw water, and the purified water drainage supply pipe 19d is connected to the drainage tank 6, so that even if it overflows, the drainage tank 6 should be used as a receiver of the overflowed raw water. Can do.

The water purification unit 3 includes a pretreatment filter chamber 11, a pretreatment carbon filter chamber 12, a water softening filter chamber 13, a reverse osmosis membrane filter chamber 14, and a posttreatment carbon filter chamber 15 in order from the upstream side by a pipe line provided with a pressure gauge. Connected in series. The raw water in the raw water tank 2 is purified by the water purification unit 3 into pure water and stored in the pure water tank 4.
The pretreatment filter chamber 11 is provided with a hollow fiber membrane filter having a pore diameter of 0.01 μm and removes impurities having a diameter larger than 0.01 μm, such as suspended substances in raw water, chlorine, and organic substances.
The pretreatment carbon filter chamber 12 and the posttreatment carbon filter chamber 15 are provided with activated carbon filters and the like, and the pretreatment carbon filter chamber 12 removes chlorine, organic matter, bacteria, etc. in the purified water after passing through the pretreatment filter chamber 11. Remove. The post-treatment carbon filter chamber 15 removes odor components of pure water after passing through the reverse osmosis membrane filter chamber 14 and adds a trace amount of mineral. The pure water that has passed through the post-treatment carbon filter chamber 15 is stored in the pure water tank 4.
The water softening filter chamber 13 is made of a cation exchange membrane or the like, and is softened by replacing hardness components such as magnesium and calcium in the purified water after passing through the pretreatment carbon filter chamber 12 with sodium.
The reverse osmosis membrane filter chamber 14 is a reverse osmosis membrane having a pore diameter of 0.0001 μm, and the purified water that has passed through the water softening filter chamber 13 is divided into pure water and purified water drainage. The separated pure water is sent to the post-treatment carbon filter chamber 15, and the purified water drainage is sent to the raw water tank 2 or the drainage tank 6 through the purified water drainage supply pipe 19d.
The filters provided in each filter chamber (11, 12, 13, 14, 15) are detachably provided so that they can be easily replaced when clogging increases and an increase in pressure gauge value is observed. In the case where the filter is not detachable, the connection part of the filter chamber may be detachable and the entire filter chamber may be replaced.
The pure water generated in the water purification unit 3 is generated at a flow rate of 1 to 2 L / min.

The capacity of the pure water tank 4 is preferably 200 to 500L. As the capacity becomes smaller than 200L, when water is used in a bath or the like, pure water becomes insufficient, and it tends not to be used simultaneously with other domestic water, which is not preferable. Further, as the capacity becomes larger than 500 L, the pure water tank becomes larger and heavier, which makes it difficult to secure the installation location and makes the installation work difficult, which is not preferable.
The water in the pure water tank 4 is sent to the purified water use section 5 by a pump 16 and used not only in a kitchen, a washroom, a bathroom, but also as washing water.

The capacity of the drain tank 6 is preferably 80 to 120L. As the capacity becomes smaller than 80 L, there is a tendency that the amount of water used is insufficient in the morning hours when toilet use is concentrated. Further, as the capacity becomes larger than 120L, it is not preferable because it is difficult to secure the installation location.
Since the purified water drainage stored in the drainage tank 6 is purified water drained from the reverse osmosis membrane filter chamber 14, the purified water drainage use section 7 that uses the water in the drainage tank 6 is used for flushing toilets, watering plants, and washing cars. Used for water.

Next, the water treatment method of the water treatment system of Embodiment 1 is demonstrated using FIG.
First, water in the water supply 8, the well 9, and the rainwater tank 10 is pumped by the pump 16, and water is supplied to the raw water tank 2 and stored. At this time, since the tap water supply pipe 19a and the well water suction pipe 19b connected to the water supply 8 and the well 9 are provided with the backflow prevention valve 17, the water in the raw water tank 2 does not flow back to the water supply 8 or the well 9. .
Next, the water in the raw water tank 2 is sent to the water purification unit 3 through the pipe line 19, and the pretreatment filter chamber 11, the pretreatment carbon filter chamber 12, the water softening filter chamber 13, the reverse osmosis membrane filter chamber 14, and the post treatment Purified in the order of the carbon filter chamber 15 and stored in the pure water tank 4.
Subsequently, the pure water in the pure water tank 4 is sent to the purified water use section 5 by the pump 16 and used as domestic water such as a bathroom, kitchen, washroom, and laundry water.
The purified water discharged from the reverse osmosis membrane filter chamber 14 is sent to the raw water tank 2 and the drainage tank 6 from the purified water / drain shared pipe 19d, and the purified water discharged to the raw water tank 2 is used as raw water. The purified water drainage in the drainage tank 6 passes through the pipeline 19 and is used for flushing toilets, watering plants, washing cars, and the like in the purified water drainage utilization unit 7.

As described above, since the water treatment system according to the first embodiment is configured, the following operation is obtained.
(1) Since a reverse osmosis membrane filter is provided, fine impurities such as radioactive substances, dioxins, agricultural chemicals, and viruses can be removed, and safe daily water can be obtained.
(2) By providing a pretreatment filter or a pretreatment carbon filter, chlorine, iron rust, bacteria, organic matter, etc. can be removed, and the load on the reverse osmosis membrane during filtration can be reduced.
(3) Since a water softening filter is provided, the hardness component can be removed and water softened,
It can be changed to water that Japanese people feel is the most delicious, as well as better foaming of detergents.
(4) Since the post-processing filter is provided, it is possible to remove odor components and the like that cannot be removed by the reverse osmosis membrane filter, and to add a trace amount of minerals.
(5) Since pure water to which a trace amount of minerals is added by the post-processing filter is used, the foaming of the detergent is good and the amount of the detergent used can be reduced, so that the environmental burden due to domestic wastewater can be reduced.
(6) Since rainwater, river water, and the like can be used as domestic water, the amount of tap water used can be reduced.
(7) The purified water drained from the reverse osmosis membrane filter can be reused as raw water, and the water in the drainage tank can be used for toilet wash water, plant watering, car wash, etc. Can be used.

  The present invention can remove impurities such as chlorine, inorganic substances such as chlorine, organic substances such as dioxins and agricultural chemicals, radioactive substances, bacteria and viruses, etc., from tap water, well water, rainwater, etc. Even when it is difficult to secure safe water, it is possible to obtain high-quality pure water as drinking water and water for daily use, and the use of detergent can be reduced, so that the amount of detergent used can be reduced and the efficiency of domestic water can be reduced. It is possible to provide a water treatment system that can be used in a practical manner.

DESCRIPTION OF SYMBOLS 1 Water treatment system 2 Raw water tank 3 Purified water part 4 Pure water tank 5 Drainage tank 6 Purified water use part 7 Purified water drainage part 8 Water supply 9 Well 10 Rainwater tank 11 Pretreatment filter room 12 Pretreatment carbon filter room 13 Soft water filter room 14 Reverse osmosis membrane filter chamber 15 Post-treatment filter chamber 16 Pump 17 Backflow prevention valve 18 Pressure gauge 19 Pipe 19a Tap water supply pipe 19b Well water supply pipe 19c Rainwater supply pipe 19d Purified water drainage supply pipe

Claims (2)

  (A) a raw water tank for storing raw water, (b) a pretreatment filter chamber in which the raw water tanks are connected in series with each other, a pretreatment carbon filter chamber, a water softening filter (ion exchange membrane) chamber, An osmosis membrane filter chamber and a post-treatment carbon filter chamber, wherein the filters in each filter chamber are detachably provided, and a water purification unit that purifies the raw water; A purified water utilization section used as irrigation water, (d) a purified water drainage supply pipe for sending the drainage of the reverse osmosis membrane filter to the raw water tank or drainage tank, and (e) water in the drainage tank separated from the purified water utilization section. A water treatment system characterized by comprising a water purification / drainage utilization unit used for domestic water.   2. The water treatment system according to claim 1, wherein the raw water tank includes intake selection means for selecting a priority order of intake of a rainwater intake, a well intake, and a water intake.

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