JPH0671149A - Potable water preparing apparatus - Google Patents

Abstract

PURPOSE:To obtain a tasty drinking water wherein carbon dioxide is positively mixed by mixing carbon dioxide generated from a carbon dioxide generator in water. CONSTITUTION:Water 12 is fed into a carbon dioxide dissolving equipment 13 through a filter equipment 4. A carbon dioxide bomb 14 used as a carbon dioxide generator is connected with a carbon dioxide dissolving equipment 13 and a carbon dioxide dissolved water 5 is formed by feeding carbon dioxide as well as water into the carton dioxide dissolving equipment 13. A tasty drinking water is obtd. thereby. Instead of using the carbon dioxide bomb as the carbon dioxide generator, it is possible to use a system wherein carbon dioxide is recovered from air as a carbon dioxide source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing drinking water.

[0002]

2. Description of the Related Art The conventional so-called drinking water production apparatus has been designed to remove odors and harmful substances such as tap water and well water.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, the conventional water maker merely removes offensive odors and harmful substances, and has no additional function.

The present invention intends to provide an apparatus for producing delicious drinking water in which carbon dioxide gas is positively mixed as well as removing bad odors and harmful substances.

[0005]

The drinking water producing apparatus according to the present invention has the following features.

According to a first aspect of the present invention, there is provided an apparatus for producing drinking water, which is connected to a carbon dioxide gas generator and mixes carbon dioxide gas generated from the carbon dioxide gas generator into water.

The drinking water production apparatus according to claim 1, wherein carbon dioxide gas in the air is used as the carbon dioxide gas source of the carbon dioxide gas generator.

A cylinder can be first considered as a carbon dioxide gas source. This has the advantage that it does not require an inexpensive and complicated system. The disadvantage is that it requires replacement and is complicated in handling. On the other hand, in order to overcome this disadvantage, a system in which carbon dioxide gas in the air is recovered and used as a carbon dioxide gas source is considered. The present invention can use any carbon dioxide gas source.

[0009]

[Operation] The drinking water production system configured as described above functions as follows.

The carbon dioxide gas generated from the carbon dioxide gas generator is sent to the carbon dioxide gas dissolving device together with the water (including hot water) that has passed through the filter device, and is supplied to the beverage. As a result, carbon dioxide is dissolved in the drinking water, and the deliciousness is increased.

It has been pointed out by Sadao Kojima [Search for Delicious Water, NHK Books (1985)] that carbon dioxide gas is dissolved in drinking water to increase its deliciousness.

According to it, one of the conditions of delicious water is that carbon dioxide gas is dissolved at about 30 ppm. The present invention is based on these findings, and an object of the present invention is to provide a drinking water production apparatus which increases the taste of drinking water by dissolving carbon dioxide in the drinking water.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. FIG. 2 shows a second embodiment of the present invention, and FIG. 3 shows an essential part of the carbon dioxide gas recovery device in the second embodiment. In the figure, 1 is air, 2 is an air supply pump, 3 is a carbon dioxide recovery device, 4 is a filtration device, 5 is carbon dioxide dissolved water, 6 is a water vapor removal tower, 7 is a carbon dioxide concentration tower, and 8 and 9 are heaters. 10 is a three-way valve, 11 is an exhaust gas, 12 is water, and 13 is a carbon dioxide gas dissolving device.

First, the first embodiment will be described. Water 1
2 is sent to the carbon dioxide gas dissolving device 13 via the filtering device 4. Here, a carbon dioxide gas cylinder 14 is used as a carbon dioxide gas generator.

The carbon dioxide gas cylinder 14 is a carbon dioxide gas dissolving device 1
3 is connected, and carbon dioxide dissolved water 5 is formed by feeding carbon dioxide together with water.

Next, a second embodiment will be described. Air 1 is caused to flow through the carbon dioxide generating device 3 to adsorb carbon dioxide in the air, and non-adsorbed gas passes through the three-way valve 10 and exhaust gas 1
1 is discharged out of the system. At this time, the other one of the three-way valve 10 is connected to the water filtering device 4, but the valve itself is closed. The carbon dioxide adsorption process by the carbon dioxide generator will be described in more detail with reference to FIG. 2. The air 1 is passed through the water vapor removal tower 6 to mainly remove water vapor, and the carbon dioxide gas enrichment tower 7 is passed through the air feed pump 2. It mainly adsorbs carbon dioxide. At this time, the higher the pressurization degree of the air supply pump 2, the larger the adsorption amount of carbon dioxide gas. An adsorbent capable of mainly adsorbing and removing water vapor (activated alumina is given as an example) is present inside the water vapor removal tower 6, and an adsorbent capable of mainly adsorbing carbon dioxide gas (zeolite is (As an example) is inherent.

However, since zeolite, which is considered to be suitable for carbon dioxide adsorption, has a low carbon dioxide adsorption power in the presence of water vapor, a water vapor removal tower 6 is provided as a pretreatment in this embodiment.

Next, the exhaust gas side of the three-way valve 10 is closed, and the carbon dioxide gas adsorbed by the carbon dioxide gas generator 3 is heated and desorbed by the heater 9 inside or outside the carbon dioxide gas concentrating tower 7, and then the filtration device. 4 dissolved in the carbon dioxide dissolving device 13 into the water 12 passed through
To make. The regeneration of the adsorbent in the water vapor removal tower 6 is performed by heating the heater 8 inside or outside the tower and operating the air feed pump 2 to discharge condensed water or water vapor to the outside of the system through the three-way valve 10. Do that. For the amount of carbon dioxide adsorbed on zeolite, refer to MS-5A in the pressure swing adsorption technology compilation (editor: Takashi Yamashita) published by Japan Society of Industrial Technology.
The carbon dioxide adsorption data of is shown, which shows that when the carbon dioxide partial pressure is 1 mm Hg, it is 4 wt% at 25 ° C.
It can be seen that, even though there is an adsorption equilibrium amount of 100%, the adsorption amount can be reduced to 1 wt% or less at 100 ° C. Carbon dioxide concentration in air is usually 300-400ppm
Since it exists, it is possible to reach up to about 25 wt. C. 4 wt% by pressurizing the air supply pump 2 to about 3.5 times the normal pressure. Currently, it adsorbs up to 2 wt% at 5 kg / cm ² , and it is considered that the adsorption amount will further increase by optimizing the operating conditions such as the contact time between the gas and the adsorbent.
Next, consider the required amount of adsorbed carbon dioxide. Considering the need for 10 liters of drinking water per day in a general household,
To set it to 0 ppm, 0.3 g of carbon dioxide gas is required. Even if the carbon dioxide gas utilization of the adsorbent is 1 wt% instead of 4 wt%, it is sufficient if 30 g of MS-5A is used. From this, it can be said that the carbon dioxide concentrating tower 7 has a very practical compact size in view of its scale. If a large amount of adsorbent is used, it can be operated near normal pressure, and if the pressurization level is increased, an extremely small amount of adsorbent will be required. Thus, it can be said that the present embodiment can set the scale of the adsorbent and the pressurization degree of the air feeding pump 2 to be extremely wide.

[0019]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, it is possible to provide an apparatus for producing drinking water in which carbon dioxide gas is mixed, which can increase the taste of drinking water.

[0020]

[Brief description of drawings]

[0021]

FIG. 1 is a schematic view showing an embodiment of the present invention.

[0022]

FIG. 2 is a schematic view showing another embodiment of the present invention.

[0023]

FIG. 3 is a diagram showing a main part of the same.

[0024]

[Explanation of symbols]

 1 Air 2 Air Supply Pump 3 Carbon Dioxide Generator 4 Filtration Device 5 Carbon Dioxide Dissolved Water 6 Water Vapor Removal Tower 7 Carbon Dioxide Concentration Tower 8, 9 Heater 10 Three-way Valve 11 Exhaust Gas 12 Water 13 Carbon Dioxide Dissolver 14 Carbon Dioxide Cylinder

Claims (2)

[Claims] 1. A drinking water production apparatus for connecting a carbon dioxide gas generator and mixing carbon dioxide gas generated from the carbon dioxide gas generator into water. 2. The drinking water production apparatus according to claim 1, wherein carbon dioxide gas in the air is used as the carbon dioxide gas source of the carbon dioxide gas generator.