JPH04114788A - Drinking water preparation apparatus - Google Patents

Abstract

PURPOSE:To supply pure water and moreover various kinds of water such as one containing hydrogencarbonates by installing a water cleaning apparatus, a water purifying apparatus to remove dissolved ions, and water preparing apparatus to prepare water containing hydrogencarbonates. CONSTITUTION:Water from a pipeline 14 is supplied to a reverse osmosis membrane unit 2 through a filter unit 22, a pipeline 26 having a solenoid valve 24, a pump 28, and a pipeline 36. The permeated water through these reverse osmosis membrane separation apparatus 34 is sent to a water-storage unit 38. A carbonic acid solution generating unit 106 press-supplies water to a tank 110 by a pump 108 and carbonic acid gas is blown to the tank 110 from a carbonic acid gas bomb 112 to prepare carbonated water. A water collector 114c filled with silver carrying activated carbon is installed in a carbonate- containing substance 114b and water containing a hydrogencarbonate is taken out of this water collecting apparatus 114c and a pipeline 118. In water cleaning system D, a pipeline 20 is connected with a filter unit 162 and the resulting filtered water is supplied to a cooling pipe 72 of a dispenser 66.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a drinking water producing apparatus, and more particularly to a drinking water producing apparatus capable of supplying various types of water such as mineral water and pure water.

[Prior Art] Water purifiers that use tap water as raw water and use activated carbon or hollow fiber membranes to remove free chlorine and suspended matter from tap water are commercially available.

[Problems to be Solved by the Invention] In these water purifiers, once the raw water is determined, the water quality is almost constant, and therefore the taste is only constant. That is, these water purifiers can only remove free chlorine, trace amounts of organic matter, iron, suspended solids, etc. from tap water, but cannot change dissolved ions in raw water. Therefore, changes in taste due to changes in dissolved ions cannot be expected. There are also equipment for producing mineral water and alkaline ionized water, but they can only produce water with a specific taste.

[Means for Solving the Problems] The drinking water production device of the present invention includes a water purification device that purifies tap water, a water purification device that removes dissolved ions from tap water, and a water purification device that purifies tap water, and a water purification device that removes dissolved ions from tap water. A device for producing water containing a bicarbonate hardness component, which is supplied under pressure.

[Function] In the drinking water production device of the present invention, the pure water device supplies pure water from which dissolved ions in tap water have been removed (hereinafter sometimes referred to as pure water). In addition, the bicarbonate hardness component-containing wood manufacturing device supplies bicarbonate hardness component-containing water that is perceived to be "tasty."

The present inventors investigated famous waters around the world and found that most of the water that is considered delicious comes from underground.The inventors focused on the reaction between water and underground components underground, and found that similar water We conducted an experiment to perform this mechanically. the result,
The important component that makes water taste delicious is the bicarbonate hardness component among minerals, and it has been found that it is important that this is present in appropriate amounts in water.

However, this bicarbonate hardness component exists only in low concentrations in nature. That is, when the concentration of the bicarbonate hardness component increases, the bicarbonate hardness component is in a gas-liquid equilibrium relationship in which it is decomposed into carbonate and carbon dioxide gas as shown in the reaction formula below.

Therefore, high concentrations of bicarbonate hardness components are not present at atmospheric pressure.

Ca (HCO3) 2':: CaCO3+H2
0+CO3Mg(HCO3)2 ;: MgCO3+
H20+CO3 The bicarbonate hardness component-containing water production device of the present invention, which is a drinking water production device, allows this reaction to occur simply and quickly, and produces water containing a high concentration of bicarbonate hardness components.

Examples of substances that elute bicarbonate hardness components in the coexistence of high-pressure carbon dioxide gas and water include minerals containing carbonate hardness components. There are many types of these minerals, such as limestone,
Examples include marble. In addition to minerals, there are also substances mainly composed of carbonate components derived from living organisms such as coral skeletons and shells. (In the case of these biological carbonate-containing substances, it is possible to elute bicarbonate hardness components at higher concentrations more quickly under the above conditions than with minerals. This is because the contact area between carbonate and water is (In other words, it is thought that this is because these substances are porous.) When these carbonate-containing substances and water are filled in a pressure vessel and carbon dioxide pressure is applied, bicarbonate is formed. Hardness components are eluted.

Note that the bicarbonate-dissolved water eluted by the above method has an unusual odor and taste peculiar to each substance.

Adsorption using an adsorbent is an effective method for removing this. Activated carbon is an effective adsorbent. just,
Dissolved water contains a large amount of free carbon dioxide, and its presence does not allow effective adsorption under atmospheric pressure. As a solution to this problem, it is effective to simultaneously adsorb the bicarbonate hardness component under conditions that elute it, or to first degas free carbon dioxide gas and then adsorb it.

The bicarbonate hardness component obtained by the above method needs to be diluted to an appropriate concentration depending on the person's preference. There are various dilution methods, but in the present invention, for example, tap water is treated with a water purifier that combines activated carbon and hollow fiber membranes, purified water is further treated with a reverse osmosis membrane, and carbon dioxide is dissolved in purified water. You can drink it according to your taste using three types of diluted carbonated water.

[Examples] The present invention will be described in more detail below based on examples.

FIG. 1 is an overall flowchart of the drinking water production apparatus of the present invention.

The drinking water production equipment shown in Figure 1 consists of pure water system A, carbonated water system B
It has four water purification systems: , bicarbonate water system C, and water purification system. Tap water, which is a raw material, is supplied via piping 10 and valve 12. The pipe 10 branches into a pipe 14 that supplies tap water to the pure water system A, a water supply pipe 16 to the carbonated water system B, a pipe 18 to the bicarbonate water system C, and a pipe 20 to the purified water system. are doing.

Water from the pipe 14 is supplied to a reverse osmosis membrane unit 32 via a filtration unit 22, a pipe 26 having a solenoid valve 24, a pump 28, and a pipe 30. This reverse osmosis membrane unit 3
2 is equipped with three reverse osmosis membrane separation devices 34, and the permeated water from these reverse osmosis membrane separation devices 34 is sent to a water storage unit 38 via piping 36. Note that the concentrated water is discharged to the outside of the system via piping 40.

The filtration unit 22 includes an activated carbon filtration layer 22a filled with silver-supported activated carbon and a hollow fiber filtration layer 22b equipped with a hollow fiber separation membrane, and tap water is first filtered through the activated carbon filtration layer 22a.
, and then filtered through a hollow fiber filtration layer 22b.

The water storage unit 38 includes a casing 41 containing cooling water, tanks 42 and 44 installed in the casing 41 so as to be immersed in raw water, and an ice maker 46 that supplies ice into the casing 41. We are prepared. The ice maker 46
is supplied with water through a pipe 48 branched from the pipe 18, freezes this water to form ice, and supplies it into the casing 41. The water in this casing 41 is cooled by this ice and cools the tank 42,44. Overflow water from the casing 41 is discharged to the outside of the thread through a pipe 50.

The tank 42 is used to temporarily store the permeated water from the reverse osmosis membrane unit 32 sent through the pipe 36. The lower half of the tank 42 is immersed in the cooling water in the casing 40, and the water in the tank 42 is cooled. The water cooled in the tank 42 is transferred to the pipe 52
, ultraviolet sterilizer 60 via pump 54 and piping 58
sent to. Water sterilized by this ultraviolet sterilizer 60 is sent to a filtration unit 64 via piping 62. Like the filtration unit 22, this filtration unit 64 also includes a filtration layer of silver-supported activated carbon and a filtration layer of hollow fiber separation membrane. The water filtered by the filtration unit 64 is sent to the dispenser 66, passes through the cooling pipe 68, and enters the water injection cock 7.
Sent to 0.

In addition to the cooling pipe 68 and water injection cock 70, this dispenser 66 also includes cooling pipes 72, 76, 80, and water injection cock 70.
4.78.82.

A water receiving plate 84 is installed below each water injection cock 70.74.78.82, and water flows out from an opening 86 in the center of the water receiving plate 84. A water receiving tank 88 is provided below the water receiving plate 84, and a glass 90 is placed on the water receiving tank 88 to receive the water flowing out from the opening 86. Said cooling pipe 68.7
2.76.80 is placed immersed in cooling water within the cooling chamber 92, and this cooling water is cooled by a cooling coil (not shown) disposed within the cooling chamber 92. 92a is a stirrer that stirs the cooling water. This cooling water and the water that has fallen onto the water receiving tank 88 are discharged out of the system via piping 94, 96, 98. Note that tap water is supplied to the cooling chamber 92 through a pipe 100 branched from the pipe 14 .

The carbonated water system B includes a filtration unit 102 that filters water sent from a pipe 16, and a carbonated water generation unit 106 to which filtered water is supplied from the filtration unit 102 through a pipe 104.
It is equipped with This carbonated water generation unit 106 produces carbonated water by supplying water under pressure to a tank 110 with a pump 108 and by blowing carbon dioxide gas into this tank 110 from a carbon dioxide gas cylinder 112.

The water in which carbon dioxide gas is dissolved in the tank 110 is supplied to the cooling pipe 80 of the dispenser 66 via a pipe 112. Note that the tank 110 is equipped with a level switch 1.
10a is provided, and the bob 108 is controlled based on the detection signal of the level switch 110a so that the water level in the tank 110 is within a predetermined range.

The bicarbonate water system C includes a mineral water generation tower 114 and a decarbonation tower 116. The mineral water generation tower 114 contains carbonate-containing substances 1 such as limestone and shells in a pressure vessel 114a.
14b is filled, and tap water is introduced from the pipe 18, and carbon dioxide gas is introduced from the gas cylinder 112 at a predetermined pressure. A water collector 114c filled with silver-supported activated carbon is installed so as to be buried in the carbonate-containing material 114b, and water containing bicarbonate is collected in this water collector 114.
C and pipe 118. In this embodiment, the activated carbon is filled in the water collector to facilitate its replacement, but it may be filled in the pressure vessel in the same way as the carbonate-containing substance. The pipe 118 is connected to the decarboxylation tower 116 via an ejector 120 and a pipe 122. Note that the ejector 120 includes a pipe 124 branched from the water pipe 20.
is connected, and the carbonate-containing water from the pipe 118 and tap water are mixed and sent to the water sprinkler 11 at the top of the decarbonation tower 116.
6a.

Note that the ejector 120 mixes bicarbonate-containing water from the bicarbonate water system with tap water by diluting the water containing excessive bicarbonate with tap water and removing the new calcium carbonate precipitate. This is to prevent this and to dilute the hardness to a level of hardness of about 300 ppm, which is suitable for drinking.

The decarboxylation tower 116 is filled with a filler such as a Raschig ring, and by blowing air through an air filter 126, an air pump 128, and a pipe 130, dissolved carbon dioxide gas is released. The decarboxylated water is sent to the tank 44 of the water storage unit 38 via piping 132.

Note that the decarboxylation tower 116 is connected to a washing water supply pipe 134, and is also provided with a washing water drainage pipe 136 and an overflow water discharge pipe 138 during backwashing. Furthermore, the decarboxylation tower 116 includes an air filter 14 for excluding bacteria in the air that is introduced when the water level drops.
0 is connected.

The water in the tank 44 passes through a pipe 142, a pump 144, a pipe 146, an ultraviolet sterilization unit 148, a pipe 150, a filtration unit 152, and then reaches the cooling pipe 7 of the devenser 66.
Sent to 6. Like the filtration unit 64, this filtration unit 152 includes a filtration layer of silver-supported activated carbon and a filtration layer of one hollow fiber separation membrane.

Note that the tanks 42 and 44 are equipped with a level switch 154.
．． 156 is provided, and the pump 28 and piping 118.1 are installed so that the water level in the tank 42.44 is within a predetermined range.
A solenoid valve provided at 24 is controlled. In addition, an air filter 158.1 is provided in the tank 42.44 for filtering the air introduced when the water level inside is lowered.
60 are connected.

In the water purification system, the pipe 20 is connected to a filtration unit 162, and the filtered water is supplied to the cooling pipe 72 of the devenser 66.

Note that the pump 54.144 is an air pump driven by carbon dioxide gas sent from the cylinder 112, and requires only a small installation space.

The drinking water production apparatus configured as described above produces pure water using the pure water system A, and can supply pure water from the water injection cock 74. That is, the tap water sent through the pipes 10 and 14 is first filtered in the filtration unit 22 using silver-supported activated carbon and a hollow fiber separation membrane to remove limescale, iron, suspended matter, etc. from the tap water. This water is pressurized by the pump 28 and sent to the reverse osmosis membrane separation device 34 of the reverse osmosis membrane unit 32 to remove dissolved ions and produce pure water. This pure water is temporarily stored in the tank 42 and cooled. The cold pure water in the tank 42 is sent to the ultraviolet sterilization unit 60 via piping 52, pump 54, and piping 58, where it is sterilized and then filtered again in the filtration unit 64 using silver-supported activated carbon and a hollow separation membrane. This process removes any residual off-flavors and tastes. As a result, pure water that tastes similar to water, such as rainwater or melted snow, can be injected from the water injection cock 70.

In the apparatus of the present invention, in the carbonated water system B, tap water is similarly filtered in the filtration unit 102 to remove limescale, iron, suspended solids, etc. from the tap water. And tank 1
10, carbon dioxide gas is supplied under pressure in the range of 2 to 10 atmospheres, and the carbon dioxide gas is dissolved. The carbon dioxide gas-dissolved water is sent to the dispenser 66 through the pipe 112, and the water is sent to the dispenser 66 through the water injection cock 82.
It is said that it is possible to leak from.

In the bicarbonate water system C, tap water is supplied into the pressure vessel 114a through the pipe 18 and brought into contact with the carbonate-containing substance, and carbon dioxide gas is supplied from the carbon dioxide gas cylinder 112 at a pressure in the range of 2 to 10 atmospheres. The bicarbonate component then dissolves into the water, creating water with a thick bicarbonate hardness. This concentrated bicarbonate aqueous solution is diluted with tap water by an ejector 120 to a hardness of about 300 ppm, and then transferred to a decarboxylation tower 116.
sent to. After the dissolved carbon dioxide gas is removed by aeration with air from the air filter 126 in the decarboxylation tower 116, it is stored in the tank 44 and cooled. The bicarbonate-containing water in the tank 44 is sent to the ultraviolet sterilization unit 148 by the pump 144, and after sterilization, it is filtered again in the filtration unit 152 using silver-supported activated carbon and hollow fiber separation membrane I membrane to eliminate trace amounts of off-odor taste. Remove. The water containing the bicarbonate hardness component produced in this way is a mellow and delicious high mineral quarter, and can flow out from the water injection cock 78.

In the water purification system, water from the pipe 20 is filtered by a filtration unit 162 to remove limescale, iron, suspended solids, etc. from the tap water. This water is city water that the user is accustomed to drinking, and can flow out from the water injection cock 74.

As described above, a desired amount of water obtained from the four water systems A to D is allowed to flow out in the dispenser 66 and collected into a drinking container such as a glass 90 so that the water can be consumed. In this case, each water type tree may be used alone, or 2.3 or 4 types of water types may be mixed at a desired ratio, depending on the consumer's preference.

In the above embodiment, the water injection cocks 70, 74, 78, 82 of the dispenser 66 can be manually operated to create mixed water at a desired ratio, but in the present invention, the mixing ratio is stored in a computer or the like. Then, a signal from the computer may be used to open and close the on-off valve to automatically produce mixed water at the desired mixing ratio. In this case, a flow counter and an on-off valve may be installed at the location indicated by H in Figure 1, and the on-off valve may be opened and closed based on a signal from a computer that reads the integrated value of the flow counter. can.

[Effects] As described above, according to the drinking water production device of the present invention, in addition to purified water obtained by purifying tap water, multiple types of water such as purified water from which dissolved ions in tap water are removed and bicarbonate-containing water can be produced. can be supplied. By appropriately mixing these waters, it is possible to produce water with a desired taste, ranging from water with a lower ion concentration than tap water to water with a high ion concentration containing a large amount of hardness components.

[Brief explanation of drawings]

FIG. 1 is a system diagram of an embodiment of the present invention. 22.64.102.152.162...filtration unit, 32...reverse osmosis membrane unit, 38...water storage unit, 46...ice maker, 60.148...ultraviolet sterilization unit, 66... ... Dispenser, 106 ... Carbonated water generation unit, 114 ... Mineral water generation tower, 116 ... Decarbonation tower.

Claims (1)

[Claims] A water purification device that purifies tap water, a water purification device that removes dissolved ions from tap water, and bicarbonate hardness component-containing water that is filled with a carbonate-containing substance and supplies carbon dioxide gas under pressure. A drinking water production device comprising: a production device.