JPH09295695A - Gas absorbing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively recycle an excess gas (CO2 ) remaining in a tank under a state wherein being separated from carbonated water without being dissolved in a liquid. SOLUTION: This gas absorbing equipment is constituted of a gas absorbing device 2 which makes carbon dioxide (CO2 ) dissolve in a liquid, and a tank 3 which stores carbonated water 16 being generated by the gas absorbing device 2. Then, the gas absorbing device 2 has an ejector system which draws and mixes the carbon dioxide being fed from a gas feeding unit, by jetting a liquid from a nozzle, and is equipped with a liquid feeding line 11 which feeds the liquid to the nozzle, and a gas feeding line 12 which feeds the carbon dioxide to the gas feeding unit. Then, between the gas feeding line 12 and the tank 3, a return line 13 which returns an excess gas 17 (CO2 ) remaining at the upper part in the tank 3, is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas absorption facility used, for example, in an apparatus for producing soft drinks containing carbon dioxide, a liquid processing apparatus for an apparatus for dissolving ozone gas, and the like.

[0002]

2. Description of the Related Art Conventionally, for example, in a process for producing a carbonated soft drink, carbonated water is dissolved in a liquid by a gas absorption device to generate carbonated water, and the carbonated water is stored in a tank. It was

According to this, when the carbon dioxide gas is dissolved in the liquid by the gas absorption device, not all the supplied carbon dioxide gas is absorbed and dissolved in the liquid, but about 80% of the carbon dioxide gas is dissolved.
Was absorbed and dissolved in the liquid, and about 20% of the remaining carbon dioxide gas was accumulated in the upper portion of the tank in a state of being separated from the carbonated water as an excess gas. For this reason, a purging device for discharging surplus gas is provided in the upper part of the tank, and the purging device is periodically operated to discharge the surplus gas in the tank to the outside.

[0004]

However, in the above-mentioned conventional type, since it is necessary to periodically perform the work of discharging the surplus gas in the tank, it is troublesome and the surplus gas discharged is wasted. There was a problem that became.

Therefore, the invention according to claim 1 of the present invention is intended to effectively reuse the surplus gas in the tank without releasing it.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is a gas absorbing device for dissolving a gas in a liquid, and a downstream side of the gas absorbing device. And a tank for storing a liquid in which a gas is dissolved, the gas absorption device has an ejector type for ejecting the liquid from a nozzle to suck and mix the gas supplied from the gas supply unit, A liquid supply line for supplying liquid to the nozzle and a gas supply line for supplying gas to the gas supply unit are provided, and the surplus gas accumulated in the upper part of the tank is supplied between the gas supply line and the tank. The feature is that a return line for returning to the line is provided.

According to this, the gas is dissolved in the liquid by ejecting the liquid from the nozzle of the gas absorbing device and sucking and mixing the gas supplied from the gas supply unit, and the liquid in which the gas is dissolved is on the downstream side. Stored in a tank. The surplus gas that did not dissolve in the liquid and accumulated in the upper part of the tank flows through the return line and is returned to the gas supply line, is supplied again from the gas supply line to the gas supply unit of the gas absorption device, and from the gas supply unit. It is sucked and mixed in the liquid. In this way, by supplying the surplus gas in the tank again to the gas supply unit, it becomes possible to effectively reuse the surplus gas without releasing it.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1 and FIG. 2, reference numeral 1 denotes a gas absorption facility used for producing a soft drink containing carbon dioxide, which includes a gas absorption device 2 for dissolving carbon dioxide (CO ₂ ) in the liquid. The tank 3 is provided on the downstream side of the gas absorption device 2 and stores the carbonated water 16 produced by the gas absorption device 2.

The gas absorbing device 2 has an ejector type in which a liquid is ejected from the nozzle 4 and the carbon dioxide gas supplied from the gas supply section 5 is suction-mixed. That is, the nozzle 4 and the gas supply unit 5 are provided on the upstream side of the mixing cylinder body 7 having the mixing chamber 6 in which the liquid and the carbon dioxide gas are mixed, and on the downstream side of the mixing cylinder body 7, A conical diffusion cylinder 8 having a diameter increased toward the downstream side is connected. A straight cylinder 9 is connected to the downstream side of the diffusion cylinder 8, and the downstream end of the straight cylinder 9 and the inlet of the tank 3 are connected via an elbow pipe 10.

A liquid supply line 11 consisting of a pipe for supplying liquid to the nozzle 4 is connected to the nozzle 4. Further, the gas supply unit 5 is connected to a gas supply line 12 including a pipe for supplying carbon dioxide gas to the gas supply unit 5.

Between the gas supply line 12 and the upper end of the tank 3, surplus gas 17 accumulated in the upper part of the tank 3 is provided.
A return line 13 including a pipe for returning the gas to the gas supply line 12 is connected. This return line 13 has a return line 13
A flow rate control valve 14 for controlling the flow rate of the surplus gas 17 flowing therethrough is provided.

A filling machine (not shown) is provided on the downstream side of the tank 3. Hereinafter, the operation of the above configuration will be described. The carbon dioxide supplied from the gas supply unit 5 via the gas supply line 12 is suction-mixed by the liquid ejected from the nozzle 4 into the mixing cylinder 7 via the liquid supply line 11 and diffused in the diffusion cylinder 8. As a result, carbon dioxide gas is dissolved in the liquid to generate carbonated water 16, and the carbonated water 16 is stored in the tank 3.

Excess gas 17 (excess carbon dioxide gas) which is not dissolved in the liquid and is separated from the carbonated water 16 in the upper part of the tank 3 flows through the return line 13 and returns to the gas supply line 12. Then, the gas is supplied again from the gas supply line 12 to the gas supply unit 5 and is suction-mixed into the liquid from the gas supply unit 5. In this way, by supplying the surplus gas 17 in the tank 3 to the gas supply unit 5 again, the surplus gas 17 can be effectively reused without being discharged. Therefore, the amount of carbon dioxide used can be saved, and the production cost of the carbonated soft drink can be reduced.

At this time, the pressure of the liquid in the liquid supply line 11 is set to P
(W), and the pressure of carbon dioxide gas in the gas supply line 12 is P
(G) and the pressure of the surplus gas 17 accumulated in the upper part of the tank 3 is P (a), P (w)> P (a)> P
Since it is (g), the surplus gas 17 surely flows into the gas supply line 12 from the return line 13.

Table 1 below shows the amount of carbon dioxide gas required when the surplus gas is discharged to the outside of the tank 3 without being reused as in the conventional case, and the surplus gas 17 as shown in FIG. This is an example of comparison with the amount of carbon dioxide gas required when returning from the return line 13 to the gas supply line 12 for reuse. That is, the gas amount (A) supplied from the gas supply unit 5 of the gas absorption device 2, the required gas amount (B) that must be newly supplied to the gas supply line 12, and the tank for obtaining 4.5 GV. The pressure (C) in 3 and the data for each item are as follows: (A) = 1 in the case where the surplus gas is discharged to the outside of the tank 3 without being reused as in the conventional case.
90 (Nl / min), (B) = 190 (Nl / min),
(C) = 4.6 (Kg / cm ² ). On the other hand, as shown in FIG. 1, when the excess gas 17 is returned from the return line 13 to the gas supply line 12 for reuse (b), the amount of the carbon dioxide gas 18 supplied from the gas supply unit 5 ( A)
Was joined from the return line 13 to the gas supply line 12 91
(Nl / min) surplus gas 17 and new gas supply line 12
The total amount is 152 (Nl / min) of the new carbon dioxide gas 19 supplied to the gas supply line 12, and (B) is the amount of carbon dioxide gas 19 that must be newly supplied to the gas supply line 12.
That is, it becomes 152 (Nl / min). In this way, when the excess gas 17 is reused (b), the required amount of carbon dioxide (B) is about 2 times as compared with the case where the excess gas is not reused (a).
You can save 0%.

GV in (C) in Table 1 means a gas volume, and 4.5 GV means that 4.5 times the liquid volume of the gas is absorbed at 0 ° C. and atmospheric pressure. Is shown.

[0017]

[Table 1]

Further, in FIG. 3, when the liquid flow rate is 42 (l / min) and the liquid temperature is 18 ° C., the pressure in the tank 3 and the gas amount (X) necessary for the saturation solubility and the reuse are used. 6 is a characteristic diagram showing the relationship between the amount (Y) of surplus gas 17 and the amount (Z) of new gas 19 newly supplied to the gas supply line 12. FIG.

[0019]

As described above, according to the invention described in claim 1 of the present invention, by ejecting the liquid from the nozzle of the gas absorption device and sucking and mixing the gas supplied from the gas supply part, The gas is dissolved in the liquid, and the liquid in which the gas is dissolved is stored in the tank on the downstream side. The surplus gas that did not dissolve in the liquid and accumulated in the upper part of the tank flows through the return line and is returned to the gas supply line, is supplied again from the gas supply line to the gas supply unit of the gas absorption device, and from the gas supply unit. It is sucked and mixed in the liquid. In this way, by supplying the surplus gas in the tank again to the gas supply unit, it becomes possible to effectively reuse the surplus gas without releasing it.

[Brief description of drawings]

FIG. 1 is a diagram of a gas absorption facility according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a gas absorption device provided in a gas absorption facility.

FIG. 3 is a characteristic diagram showing the relationship between the pressure in the tank, the amount of gas required for saturation solubility and the amount of excess gas to be reused, and the amount of new gas newly supplied to the gas supply line.

[Explanation of symbols]

 1 gas absorption equipment 2 gas absorption device 3 tank 4 nozzle 5 gas supply unit 11 liquid supply line 12 gas supply line 13 return line 17 surplus gas

Claims (1)

[Claims] 1. A gas absorption device for dissolving a gas in a liquid, and a tank provided downstream of the gas absorption device for storing the liquid in which the gas is dissolved, the gas absorption device including a nozzle. It has an ejector type that ejects the liquid and sucks and mixes the gas supplied from the gas supply unit.
A liquid supply line for supplying liquid to the nozzle and a gas supply line for supplying gas to the gas supply unit are provided, and a surplus gas accumulated in the upper part of the tank is gasted between the gas supply line and the tank. Gas absorption facility characterized by having a return line for returning to the supply line.