JPH0523150A - Deaeration method and method and apparatus for producing carbon dioxide water - Google Patents

Abstract

PURPOSE:To produce a carbon dioxide water containing a relatively large volume of the gas at about ordinary temperature by allowing raw water to pass through a fine particle porous material in a reduced pressure atmosphere. CONSTITUTION:Raw water is fed into a deaeration tank 1 as shown by the arrow 24 and subsequently blown out from a porous material 5a in the deaeration tank under a reduced pressure of approximately 500mmHg. The deaerated water 25 reduced in the dissolved oxygen gas is fed into a cooler 8 as shown by the arrow 30, maintained at a constant temperature in a temperature controller 32, bubbled with carbon dioxide gas in an ejector 9, mixed with the carbon dioxide gas in a mixer 10, and subsequently blown out from a porous material 5b in a carbon dioxide tank 12 as shown by the arrow 33. The carbon dioxide concentration of the carbon dioxide water is measured with a carbon dioxide concentration-measuring device 21e, and when the concentration does not reach a prescribed value, the carbon dioxide water is fed into the ejector 9. The carbon dioxide water having a prescribed concentration is obtained by such circulation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention has a dissolved oxygen content of 1.0.
The present invention relates to a degassing method, a carbonated water production method, and a carbonated water production apparatus, which are intended to produce carbonated water by cooling treated water less than ppm to a temperature lower than room temperature.

[0002]

2. Description of the Related Art Conventionally known deaeration treatments include a deaeration treatment method in a vacuum atmosphere or a carbon dioxide atmosphere, and a method of injecting and replacing carbon dioxide. The former includes packed tower type, wet wall type, spray type and jet type.

In addition, as shown in FIG. 2, the conventional carbonated water producing apparatus generally supplies the raw treated water sent from the water treatment apparatus, degasses it with a deaerator, and then cools it with a cooler. It is a combination of a series of devices which are cooled and then mixed and dissolved with carbon dioxide in a carbonated water producing machine and then stored in a tank. The deaerator uses one of the deaerating methods, and the raw treated water contains air 15 to 30 Ncc / l (oxygen 5 to 5
10 Ncc / l) is dissolved. A cooling device is connected to the cooler, and a constant-ratio mixer with syrup is connected to the carbonated water producing machine.

[0004]

According to the above conventional deaerating method, the amount of dissolved oxygen in the treated water is 0.7 to 1.4 Ncc / l.
(1-2 ppm) is practical. For example, in order to further reduce the amount of dissolved oxygen by using the above-mentioned conventional method, a large amount of equipment cost is required, and it is said to be impractical because it causes a rise in manufacturing cost. However, when the amount of dissolved oxygen is about 1 to 2 ppm, there is a problem that the carbonated water cannot be stabilized unless the temperature of the treated water is adjusted to about 5 ° C. during production. Therefore, it is necessary to make the cooling device relatively large. Further, when the amount of dissolved oxygen is large, the gas volume of carbon dioxide tends to be small, so that there is a problem that it is difficult to form a preferable carbonated water. Therefore, in order to stabilize the product, conventionally, a large product storage tank (1 m ^{3 to} 2 m
³ ) was needed.

[0005]

However, according to the present invention, the amount of dissolved oxygen is reduced to less than 1 ppm by allowing treated water to pass through a porous body having a small particle size (for example, 60 μm or less) for degassing. It succeeded and solved the above-mentioned conventional problems.

That is, the invention relating to degassing is a degassing method characterized by allowing raw treated water to pass through a porous body having a minute diameter in a reduced pressure atmosphere.

The invention for producing carbonated water is characterized in that water having a dissolved oxygen content of less than 1.0 ppm is adjusted to a temperature below room temperature and an appropriate amount of carbon dioxide is supplied to this. It is a manufacturing method. Next, the temperature of the cooling water is from room temperature to 0.
It was measured in ° C.

The invention of the apparatus further includes a deaerated water producing apparatus having a porous body through which the raw treated water should pass, a cooling apparatus for cooling the treated water passing through the deaerated water producing apparatus to room temperature or below, It is a carbonated water production apparatus characterized in that a carbon dioxide dissolving device for adding carbon dioxide to the treated water that has passed through the cooling device to dissolve it uniformly is combined. Next, the temperature of the treated water is 5 ° C
It is set to 15 ° C.

The invention of another device is provided with a porous body in which a feed water pump, a valve, and a carbon dioxide supply line are connected in a cylindrical pipe, and a liquid level control device, and an oxygen concentration measuring device and oxygen are provided outside the cylindrical pipe. A pump capable of circulating water at the outlet of the cylindrical tube according to the instruction of the concentration measuring device, a valve having a circulation line connected to the porous supply port, and a pump of the circulation line according to the instruction of the oxygen concentration meter. A valve for stopping the valve to feed degassed water, a liquid feed line equipped with a pump, a porous body for separating oxygen and nitrogen from the feed water in the cylindrical pipe, and a vacuum pump for the cylindrical pipe. The apparatus for producing carbonated water is characterized in that the suction pipes are connected. Further, the degassed water is cooled to a predetermined temperature, a cooling mechanism is provided for controlling the temperature, and a pump for supplying the cooling device and a valve for measuring the temperature of the cooling water and adjusting the amount of the cooling water are also provided. It is what Next, a carbon dioxide supply line in the cylindrical tube,
An ejector connected to the cooling degassed water supply pipe, a mixer for mixing carbon dioxide and cooling water, a device for controlling the liquid level in the cylindrical pipe, and carbon dioxide and cooling water according to an instruction from the liquid level control device. A porous body with a valve connected to control the supply amount of the mixed solution, a mechanism for measuring the carbonic acid concentration from the bottom of the cylindrical tube, and carbonated water is returned to the ejector inlet according to the instructions of the measuring mechanism to produce a uniform carbonated water. It is characterized by doing.

As described above, according to the present invention, raw treated water (amount of dissolved gas of 10 ppm to
Dissolved gas amount of several tens of ppm, dissolved oxygen amount of 2 ppm or more)
It can be kept below ppm (the amount of dissolved oxygen is less than 1 ppm).

Conventionally, a large amount of equipment and cost were required to reduce the amount of dissolved oxygen to 1 ppm or less, but according to the present invention, the cost can be relatively low and simple. According to the result of the experiment, the particle size of the porous body is preferably 60 μm or less. For example, with a particle size of 30 μm and a vacuum degree of 500 mmHg, the amount of dissolved oxygen was 0.5 ppm in one pass.

As described above, the amount of dissolved oxygen can be reduced even when the cooling temperature of the treated water is near room temperature, and naturally the amount of dissolved nitrogen is also reduced, so that the gas volume (of carbon dioxide per 1 liter of water is reduced). (Dissolved amount) also becomes large and strong carbonated water is produced.

In the present invention, treated water and carbon dioxide are put into an ejector and mixed, and at the same time, they are passed through the porous body, so that stable carbonated water can be obtained. Therefore,
The product storage tank that was previously needed is no longer needed.

[0014]

According to the present invention, since the raw treated water passes through the porous body under a reduced pressure atmosphere, the treated water having a low dissolved gas can be easily obtained.

According to the present invention, stable carbonated water is obtained by passing the mixed water of treated water and carbon dioxide through the porous body.

[0016]

Example 1 A degassing treatment was performed under the following conditions.

Porous body particle size 30 micron Supply water 10 L / min Carbon dioxide 0.25 L / min Vacuum degree 500 mmHg Dissolved oxygen amount in the supply water was 10 ppm (nitrogen amount 50 ppm). The amount is 0.5ppm
(Dissolved nitrogen amount was reduced to 2.5 ppm). In the conventional vacuum method, the amount of dissolved oxygen is 2.0 ppm (the amount of dissolved nitrogen is 1.0 p
pm).

[0018]

Example 2 A degassing process was performed under the following conditions.

[0019] Porous body particle size 30 microns Supply water 10 L / min Carbon dioxide 0.25L / min Vacuum degree 500mmHg From the above, the same results as in Example 1 were obtained.

[0020]

Example 3 The results of Table 1 were obtained when the conventional method and the invention method were carried out under predetermined conditions.

[0021]

[Table 1]

As described above, the carbonated water produced according to the present invention has a remarkably small amount of dissolved oxygen and dissolved nitrogen.
It was confirmed that the stability was good, the taste was excellent, and the gas volume was large.

[0023]

[Example 4] The results of Table 2 were obtained when the conventional method and the invention method were carried out under predetermined conditions. In this example, the mixed water was also passed through the porous body.

[0024]

[Table 2]

As described above, the carbonated water prepared by the method of the invention has various excellent properties.

[0026]

Example 5 When the conventional method and the invention method were carried out under predetermined conditions, the results shown in Table 3 were obtained.

[0027]

[Table 3]

According to the above, although the gas volume was slightly inferior to that of Example 4, the taste and stability were the same.

[0029]

[Embodiment 6] Table 4 shows a comparison between the apparatus of the present invention and the apparatus of the conventional method.

[0030]

[Table 4]

As described above, in the case of the present invention, temperature control is easy, a storage tank is not required, and the installation area can be remarkably reduced. Generally, there is an advantage that the manufacturing is easy and the gas volume can be easily adjusted.

[0032]

[Embodiment 7] An embodiment of the invention will be described with reference to FIG.

A feed pipe 2 for the raw treated water and a suction pipe 4 of a vacuum pump 3 are connected to the degassing tank 1, and the water feeding pipe 2 in the degassing tank 1 is connected.
The porous body 5a is connected to the tip of the water supply pipe 6, and the base end of the water supply pipe 6 of the treated water is connected to the lower part of the degassing tank 1.
Is connected to an ejector 9 and a mixer 10 via a water pump 7a and a cooler 8, and a discharge pipe 11 of the mixer 10 is connected to a porous body 5b in a carbonated water tank 12, A carbonated water supply pipe 14 is connected to the lower part of the. In the figure, 13a and 13b are flowmeters, 15a and 15b are liquid level control devices composed of electrode rods 16 and 17, and 18a and 18b.
b and 18c are pressure gauges, 19 is a vacuum gauge, 7b, 7c and 7
d, 7e, 7f are various pumps, 20a, 20b, 20c
Is a pressure reducing valve, 21a and 21b are oximeters, 22a and 22
Reference numeral b is a thermometer, and 23a and 23b are temperature indicators.

In the above-mentioned embodiment, when the raw treated water (raw water for producing carbonated water) is fed into the degassing tank 1 as indicated by the arrow 24, the raw treated water is blown out from the porous body 5a and the degassing tank is discharged. Collect in the lower part of 1 (deaerated water 25). Since the degassing tank 1 is depressurized to about 500 mmHg by the vacuum pump 3, separated air (oxygen, nitrogen) dissolved in the raw treated water is discharged, dissolved oxygen amount 0.5 ppm, dissolved nitrogen. Amount 2.
It becomes about 5ppm. The water level in the degassing tank 1 is controlled by the electrode rod 16, and the valve 26 of the feed pipe 2 is opened and closed by the output of the liquid level control device 15a by the contact and separation of the water surface at the lower end of the electrode rod 16. When the treated water does not reach a predetermined concentration (for example, 0.5 ppm) by measuring the dissolved oxygen amount, the valve 27 is opened and the pump 7c is started by the output of the oxygen measuring device, and the circulation pipe 28 is turned on. After that, the treatment liquid is sent to the feed pipe 2 as indicated by an arrow 29, and again passes through the porous body 5a.

The treated water having the predetermined oxygen concentration is
It is sent to the cooler 8 as indicated by the arrow 30 by the pump 7a. The cooling water 31 in the cooler 8 is supplied by the temperature controller 32. It is always kept at a constant temperature (for example, 10 ° C). Then, carbon dioxide is blown into the treated water at a constant temperature in the ejector 9 and then mixed by the mixer 10. In this case, the flow rate of carbon dioxide is measured by the flow meter 13b and the pressure reducing valve 20.
a, 20b, 20c, etc. In this way, the mixture is supplied as shown by the arrow 33, and the porous body 5b is obtained.
Is blown into the carbonated water tank 12. The carbonate concentration of this carbonated water is measured by the carbonate concentration measuring device 23b, and when it does not reach a predetermined concentration, the valve 34 is opened by the output thereof, the pump 7d is started, and the carbonated water is indicated by the arrow 35. Is again sent to the ejector 9 and mixed again with carbon dioxide. Therefore, carbonated water having a predetermined concentration can be obtained by such circulation. So open the valve 36,
Transfer the product to another location. As described above, carbonated water having a predetermined carbonic acid concentration can be easily obtained because the carbonic acid concentration is circulated for measurement. Therefore, products having the same carbonic acid concentration can be easily continuously manufactured.

[0036]

According to the present invention, since the raw treated water is passed through the porous body and is placed in a reduced pressure atmosphere, the concentration of dissolved oxygen can be easily reduced to less than 1 ppm. Therefore,
Even if the cooling concentration is relatively high (near room temperature), a sufficient gas volume can be obtained and the stability of the carbonated water is good, so various effects such as the need for a storage tank for product stabilization are achieved. is there.

[Brief description of drawings]

FIG. 1 is a system diagram of a carbonated water production apparatus of the present invention.

FIG. 2 is a block diagram of a conventional carbonated water production line.

[Explanation of symbols]

1 degassing tank 2 feeding pipes 3 vacuum pump 4 suction tube 5a, 5b Porous body 6 water pipe 7a, 7b, 7c, 7d, 7e, 7f Pump 8 cooler 9 ejector 10 mixer 11 discharge pipe 12 Carbonated water tank 13a, 13b Flowmeter 14 Supply pipe 15a, 15b Liquid level control device 16, 17 electrode rod 18a, 18b, 18c Pressure gauge 19 vacuum gauge 20a, 20b, 20c Pressure reducing valve 21a Oximeter 21b Carbon dioxide concentration measuring instrument 22a, 22b thermometer 23a, 23b Temperature indicator

Claims (8)

[Claims] 1. A porous body having a small diameter, in a reduced pressure atmosphere,
A degassing method characterized by passing raw treated water. 2. A method for producing carbonated water, which comprises adjusting the temperature of water having a dissolved oxygen content of less than 1.0 ppm to a temperature below room temperature and supplying an appropriate amount of carbon dioxide thereto. 3. The method for producing carbonated water according to claim 2, wherein the cooling water temperature is from room temperature to 0 ° C. 4. A degassed water producing apparatus having a porous body through which the raw treated water should pass, a cooling device for cooling the treated water passing through the degassed water producing apparatus to room temperature or below, and the cooling device. An apparatus for producing carbonated water, characterized in that a carbon dioxide dissolving apparatus for adding carbon dioxide to the treated water to uniformly dissolve the treated water is combined. 5. The carbonated water producing apparatus according to claim 4, wherein the temperature of the treated water is 5 ° C. to 15 ° C. 6. A cylindrical body is provided with a porous body having a feed water pump, a valve and a carbon dioxide supply line connected to the inside, and a liquid level control device, and an oxygen concentration measuring device and an oxygen concentration measuring device are provided outside the cylindrical pipe. A pump that can circulate water at the outlet of the cylindrical pipe according to the instruction, a valve provided with a circulation line connected to the porous supply port, and the pump and valve of the circulation line are stopped according to the instruction of the oxygen concentration meter. Equipped with a valve for feeding degassed water by means of a pump, a liquid feed line with a pump, a porous body for separating oxygen and nitrogen from the feed water in the cylindrical pipe, and a suction pipe of a vacuum pump connected to the cylindrical pipe An apparatus for producing carbonated water, characterized in that 7. A cooling mechanism for cooling the degassed water to a predetermined temperature and controlling the temperature, a pump for supplying a cooling device, and a valve for measuring the temperature of the cooling water and adjusting the amount of the cooling water. The carbonated water production apparatus according to claim 6, wherein. 8. A carbon dioxide supply line in a cylindrical pipe, an ejector connecting the cooling degassed water supply pipe, a mixer for mixing carbon dioxide and cooling water, and a device for controlling the liquid level in the cylindrical pipe. , A porous body connected with a valve for adjusting the supply amount of a mixed liquid of carbon dioxide and cooling water according to the instruction of the liquid level control device, a mechanism for measuring the carbonic acid concentration from the bottom of the cylindrical tube, carbonated water by the output of the measuring mechanism, The carbonated water producing apparatus according to claim 6, wherein the carbonated water is uniformly circulated by returning to the ejector inlet and circulating.