JPH1199386A - Tasty water producing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce the drinking water appropriately contg. the component of tasty water. SOLUTION: This device has a pretreating device for removing the residual chlorine, foreign matter, etc., contained in the water from a water source and a membrane module 14 divided by a low-pressure reverse-osmosis membrane 21 high in flow resistance to org. matter, malodorous material and sulfate ion, low in flow resistance to mineral ions of calcium, potassium, etc., and having specific selectivity into the primary compartment 22 and secondary compartment 23 and keeping the ionic concn. of the prepurified water supplied from the pretreating device appropriate. The prepurified water is supplied under pressure to the primary compartment 22 of the module 14 by a pump 13, and a circulating circuit for sending the water separated by the low-pressure reverse-osmosis membrane 21 and contg. ions to the pump 13 is furnished in the module 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly uses tap water as raw water, and removes organic substances and odorous substances which impair the taste of the water contained in the tap water, leaving a moderate amount of minerals which are components of delicious water. The fields of use for the apparatus for manufacturing are, for example, public facilities, restaurants such as restaurants, other food industries, developers such as condominiums, and neighborhood associations.

[0002]

2. Description of the Related Art Tap water is obtained by removing impurities such as dust contained in water from rivers and reservoirs as a water source, sterilizing it with chlorine, and sending it to homes and factories by a pump. On the other hand, pure water is used in chemical plants and semiconductor manufacturing plants, and reverse osmosis membranes are used in the production of pure water. This reverse osmosis membrane is made of a porous member and utilizes the property that water molecules pass through but do not allow ions or dissolved substances having a large particle diameter to pass through.

[0003]

However, the tap water contains not only residual chlorine but also various ions and the like which are difficult to remove at a water purification plant. It contains certain organic substances, odorous substances, and sulfate ions, and as a result, there is a problem that it is not delicious as drinking water. On the other hand, in the conventional method of producing water using a reverse osmosis membrane, almost all of the impurities contained were filtered, so that calcium and potassium, which are delicious components of water, were also removed in the water, There was a problem that the water became tasteless. Further, in equipment using a reverse osmosis membrane, 30 to 50 for home use.
% For industrial use, only about 60 to 70% can be used, and a considerable amount of surplus water is generated, which is not suitable for saving water. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus for producing delicious water using a low-pressure reverse osmosis membrane that can efficiently and at low cost produce drinking water containing components of appropriately delicious water. Aim.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The delicious water production device described has a pretreatment device that removes residual chlorine and foreign substances contained in water from the water source, and a large passage resistance against organic substances, odorous substances, and sulfate ions,
For the mineral ions such as calcium and potassium, it is divided into a primary chamber and a secondary chamber by a low-pressure reverse osmosis membrane with low specificity and low specificity of passage resistance. A membrane module for maintaining a proper concentration, and the pre-purified water is supplied under pressure by a pump to the primary chamber of the membrane module, and the membrane module is provided with the low-pressure reverse osmosis membrane. A circulation circuit for sending water containing the separated ions to the pump; The delicious water producing device according to claim 2 is the delicious water producing device according to claim 1, wherein the pretreatment device comprises an activated carbon tank and a filter tank connected to the activated carbon tank. The delicious water producing apparatus according to claim 3 is the delicious water producing apparatus according to claim 1 or 2, wherein a water storage tank having a liquid level sensor is provided on an outlet side of the membrane module. When it is detected that the amount of water has decreased, the pump is driven to filter the water sent from the water source.
According to a fourth aspect of the present invention, there is provided the delicious water producing apparatus according to the third aspect, wherein a disinfection device and a cooling device for the discharged water are provided on an outlet side of the water storage tank. The apparatus for producing delicious water according to claim 5 is the apparatus for producing delicious water according to any one of claims 1 to 4, wherein the low-pressure reverse osmosis membrane has a salt rejection rate of 5%.
It is in the range of 0-70%. Here, when the salt rejection exceeds 70%, calcium ions and potassium ions, which are the components of delicious water, are removed to approach pure water. When the salt rejection is less than 50%, the water is unsatisfactory. Sulfate ion, which is a component to be mixed, enters the product.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a block diagram of an apparatus for producing delicious water according to an embodiment of the present invention.

As shown in FIG. 1, an apparatus 10 for producing delicious water according to an embodiment of the present invention comprises an activated carbon tank 11 and a connected filter tank 12 which constitute a pretreatment device.
, A membrane module 14 connected to the filter tank 12 via a pump 13, a water storage tank 15 connected to the outlet side of the membrane module 14, and an example of a sterilizer connected to a drain port of the water storage tank 15. It has an ultraviolet sterilizer 16 and a cooling device 17. Hereinafter, these will be described in detail.

The activated carbon tank 11 is provided with an exchangeable activated carbon. The lower inlet side is connected to a tap faucet 19 as an example of a water source via an electromagnetic valve 18. This activated carbon tank 11
This removes residual chlorine, odors, trihalomethane, and the like contained in tap water. The filter tank 12 is connected to an upper outlet of the activated carbon tank 11. The filter tank 12 is for removing fine powder of activated carbon generated from the activated carbon tank 11 and fine solids (SS) passing through the activated carbon tank 11.

A membrane module 14 is connected to the outlet side of the filter tank 12 via a pump 13. The membrane module 14 includes a closed vessel 20 and a low-pressure reverse osmosis membrane 21 for partitioning the inside.
2 and a secondary chamber 23. Water from the pump 13 is supplied to the lower inlet 24 of the primary chamber 22, and water containing a large amount of sulfate ions and the like that does not pass through the low-pressure reverse osmosis membrane 21 is discharged from the upper outlet 25, and is pumped through the circulation valve 26. , And as a result circulates in the primary chamber 22. A part of the circulated water is discharged to the outside through a drain valve 27, and is further discharged to the outside by opening a timer-controlled electromagnetic valve 28 periodically.

The low-pressure reverse osmosis membrane 21 adjusts the component of the water passing therethrough when the water pressurized by the pump 13 passes through the low-pressure reverse osmosis membrane 21. The low-pressure reverse osmosis membrane 21 is made of a low-pressure reverse osmosis membrane having a high specific resistance to organic substances, odorous substances, and sulfate ions, and a low specific resistance to the passage of mineral ions such as calcium and potassium. . In this embodiment, the pressure of the water pressurized by the pump 13 is set to 2 to 5
In the case of kg / cm ^{2, those} which do not pass sulfate ions and the like but selectively pass sodium ions, potassium ions, calcium ions and the like are used.

The secondary chamber 23 of the membrane module 14 is provided with a drain port 29 at the upper part, and discharges delicious water that has passed through the low-pressure reverse osmosis membrane 21.
The water is to be stored. In the water storage tank 15,
A liquid level sensor 30 is provided so that the amount of accumulated delicious water can be measured. A drain port 31 is provided in the lower part of the water storage tank 15, and the pump 32 and the ultraviolet sterilizer 1 are provided.
Delicious water circulates in the water storage tank 15 through the inner space 6. The ultraviolet sterilizer 16 includes an ultraviolet sterilizer lamp therein, and irradiates ultraviolet light to water passing therethrough to suppress the generation of bacteria and the like and sterilize the generated bacteria. Part of the delicious water that has passed through the UV sterilizer 16 is supplied to a first water outlet 33 having a manual stop valve 33a.
Can be discharged as room temperature water, or can be discharged as cold water from the second water outlet 34 provided with the cooling device 17 and the stop valve 34a.

The operation of the apparatus 10 for producing delicious water will be described in more detail. A control device (not shown) is provided to control the solenoid valves 18 and 28 and the pumps 13 and 32. In the initial operation, the solenoid valve 18 is opened, the pump 13 is operated, and the tap water from the tap faucet 19 is supplied to the activated carbon tank 11.
And, it leads to the membrane module 14 through the filter tank 12. The circulation module 26 and the drain valve 27 (which may be closed at first) are adjusted to an appropriate opening degree to adjust the membrane module 14.
When the pressure of the primary chamber 22 in the inside is properly controlled, the activated carbon tank 1
The tap water from which organic substances, odorous substances, TOC (total organic carbon), THM (trihalomethane), TOX (total organic halogen compounds) and the like are appropriately removed by the filter tank 1 and the filter tank 12 passes through the low-pressure reverse osmosis membrane 21. As described above, the low-pressure reverse osmosis membrane 21 allows passage of ions such as calcium and potassium, which are delicious water components, and does not allow passage of sulfate ions, which are components that make water tasteless, as a result. The water passing through 21 becomes delicious water. Table 1 shows the components of delicious water produced using this apparatus. In addition, for comparison, the components of tap water and the components of water produced using a conventional membrane module are shown.

[0012]

[Table 1]

As is clear from Table 1, the water produced using the conventional membrane module has a form similar to pure water since most of the impurities contained in tap water are removed.
Minerals such as calcium, which is a component of tasty water, are also removed at the same time, resulting in water that is not delicious. On the other hand, the water produced using the delicious water producing apparatus 10 is free of organic substances and sulfate ions that impair the taste of the water, and contains moderate amounts of minerals, which are components of the delicious water, to become delicious water. . When water produced by this delicious water producing apparatus 10 was subjected to a water test by about 100 panelists, about 80% of the panelists described the water produced by this apparatus as "a mellow, clear, aftertaste. Is good. "

The water produced by the membrane module 14 is stored in the water storage tank 15 as it is. Since the water storage tank 15 is equipped with the liquid level sensor 30, when the amount of accumulated delicious water reaches a certain level, the solenoid valve 18 is automatically closed, and the pump 13 is stopped to temporarily stop production of delicious water. become. When it is detected that the amount of water has decreased, the pump 13 is driven to filter the water sent from the water tap 19. On the other hand, if left in the water storage tank 15 as it is, microorganisms may be generated in the water storage tank 15. Therefore, the pump 32 is constantly operated to sterilize the water inside by the ultraviolet sterilizer 16. When the stop valve 33a is opened, the water in the water storage tank 15 is discharged as it is from the first water outlet 33 as room temperature water, and when the stop valve 34a is opened, the second water outlet 3 is opened.
4 is discharged as cooling water. In addition, membrane module 1
If the water in the primary chamber 22 in the chamber 4 is repeatedly circulated, the concentration of the impurities becomes high. In this delicious water producing apparatus 10, about 90% of tap water can be made delicious water,
About 10% of the remaining water is surplus.

In the above-described embodiment, the activated carbon tank 11 and the filter tank 12 are used as the pretreatment apparatus. However, any other apparatus capable of removing residual chlorine, foreign matter, organic matter, THM, etc. contained in tap water to some extent can be used. May be used. The presence of this pretreatment device can prevent the low-pressure reverse osmosis membrane 21 in the membrane module 14 from being clogged and extend its life. Also, in this embodiment, all power supplies are available at any location.
Although the power supply is set to 00 V, it may be set to 200 V in some cases.

[0016]

According to the apparatus for producing delicious water according to the first to fifth aspects, the membrane module has high passage resistance to organic substances, odorous substances and sulfate ions, and passes to mineral ions such as calcium and potassium. Since a low-pressure reverse osmosis membrane with low resistance and selective specificity is used, it selectively passes delicious water components contained in raw water and does not pass unpleasant components. Tasty water can be easily produced at low cost from raw water such as tap water. In addition, since water is purified using a low-pressure reverse osmosis membrane, the amount of generated water is small and delicious water can be produced efficiently. In particular, in the apparatus for producing delicious water according to claim 2, the pretreatment device includes an activated carbon tank and a filter tank connected to the activated carbon tank, so that the activated carbon tank can preliminarily adsorb undesired water components. The filter tank can remove activated carbon powder and other foreign matter (SS) from the activated carbon tank. In the apparatus for producing delicious water according to claim 3, since the water storage tank is provided, stable operation can be performed even when water is used intermittently as in the case of normal water use. Can be. In the apparatus for producing delicious water according to claim 4, since a disinfection device and a cooling device for the discharged water are provided on the outlet side of the water storage tank, bacteria and the like in a case where the water storage tank is provided to store water are provided. Can be prevented, and safe water supply can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of an apparatus for producing delicious water according to an embodiment of the present invention.

[Description of Signs] 10 Apparatus for producing delicious water 11 Activated carbon tank 12 Filter tank 13 Pump 14 Membrane module 15 Storage tank 16 Ultraviolet sterilizer (sterilizer) 17 Cooling device 18 Solenoid valve 19 Water tap 20 Closed vessel 21 Low pressure reverse osmosis membrane 22 Primary Room 23 Secondary Room 24 Lower Inlet 25 Upper Exit 26 Circulation Valve 27 Drain Bubble 28 Solenoid Valve 29 Drain Outlet 30 Liquid Level Sensor 31 Drain Outlet 32 Pump 33 First Water Outlet 33a Stop Valve 34 Second Outlet 34a Stop valve

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Manabu Suzuki 1-2-1, Shinike, Tobata-ku, Kitakyushu-city, Fukuoka Prefecture Inside the Kitakyushu Institute of Environmental Science (72) Inventor Takashi Irie 1 Jonai, Kokurakita-ku, Kitakyushu-shi, Fukuoka No. 1 Kitakyushu City Hall (72) Ryota Shinohara 1-1, Jonai, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture Kitakyushu City Hall (72) Inventor Junichi Iwamura 3-4-1 Kowakae, Higashi Osaka City, Osaka Prefecture Kinki University Iwamura Laboratory (72) Inventor Hidenori Eguchi 2-1 Nakahara Shinmachi, Tobata-ku, Kitakyushu City, Fukuoka Prefecture Inside Sophia Engineering Co., Ltd. (72) Inventor Seio Namba 2-1 Nakahara Shinmachi, Tobata-ku, Kitakyushu City, Fukuoka Prefecture Sofia Engineering Co., Ltd.

Claims (5)

[Claims] 1. A pretreatment device for removing residual chlorine and foreign substances contained in water from a water source, and having a high resistance to passage of organic substances, odorous substances and sulfate ions, and a resistance to mineral ions such as calcium and potassium. Has a membrane module that is divided into a primary chamber and a secondary chamber by a low-pressure reverse osmosis membrane having a low specific resistance and having selective specificity, and that appropriately maintains the ion concentration of the prepurified water supplied from the pretreatment device. The pre-purified water is pressurized and supplied to the primary chamber of the membrane module by a pump, and the membrane module is provided with water containing ions separated by the low-pressure reverse osmosis membrane. An apparatus for producing tasty water, comprising a circulation circuit for feeding water to the water. 2. The apparatus for producing delicious water according to claim 1, wherein the pretreatment device comprises an activated carbon tank and a filter tank connected to the activated carbon tank. 3. A water storage tank having a liquid level sensor is provided at an outlet side of the membrane module. When it is detected that the amount of water in the water storage tank has decreased, the pump is driven to send water from a water source. The apparatus for producing delicious water according to claim 1 or 2, wherein the water is filtered. 4. The apparatus for producing delicious water according to claim 3, wherein a disinfection device and a cooling device for the discharged water are provided on an outlet side of the water storage tank. 5. The low pressure reverse osmosis membrane has a salt rejection of 50 to 50.
The apparatus for producing delicious water according to any one of claims 1 to 4, which is in a range of 70%.