JPS5818134B2 - Carbon dioxide absorption method in distribution system pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the production of soft drinks, conventionally, a carbon dioxide absorption device as shown in FIG. 1 has been used.

In the above device, the carbon dioxide absorption tank a is kept cool by a heat insulating material, and the pressure-regulated carbon dioxide gas is supplied to the tank a from the carbon dioxide gas pipe C.

Furthermore, a pressure gauge d for measuring the pressure inside the tank and a product liquid supply pipe e are provided at the top of the carbon dioxide absorption tank a.

Furthermore, within the carbon dioxide absorption tank a, a distribution mixer f is disposed below the lower end of the product liquid supply pipe e;
A cooling plate g is arranged below it, and the cooling plate g is cooled by the refrigerant sent from the refrigerant supply pipe h and vaporized and discharged to the refrigerant discharge pipe i.

Furthermore, in the carbon dioxide absorption tank a, a collecting plate j is disposed below the cooling plate g, and a baffle plate k is provided at the bottom of the tank a to discharge the product liquid from the bottom of the tank a. An outlet pipe 1 is connected.

Note that m is a liquid temperature measuring device.

In the carbon dioxide absorption device shown in FIG. 1, carbon dioxide gas is supplied with a controlled pressure into a tank a from a carbon dioxide pipe C, and a product liquid is supplied to a distribution mixer f from a product liquid supply pipe e.
When the liquefied refrigerant is supplied from the cooling supply pipe h to the cooling plate g, the product liquid in the distribution mixer f is mixed, and the mixed liquid is uniformly distributed on the surface of the cooling plate g to form a liquid film. The liquid film absorbs carbon dioxide while being cooled in a carbon dioxide atmosphere.

The product liquid that has absorbed carbon dioxide gas on the surface of the cooling plate 2 falls into the collection pan j, is mixed, and is homogenized before being transferred to the tank a.
is stored quietly at the bottom of the

In this way, in the device shown in FIG. 1, the carbon dioxide absorption concentration of the product liquid is controlled by controlling the carbon dioxide pressure in tank a and the cooling temperature on the cooling plate. The control response of the system was low, making it unsuitable for automatic control of the amount of carbon dioxide absorbed.3Moreover, there was a limit to the amount of product liquid processed per cooling plate in terms of cooling and carbon dioxide absorption. The number of cooling plates required is proportional to the amount of product liquid to be processed, and tank a, which accommodates regular cooling plates, becomes larger to accommodate the increase in product liquid. However, the space usage efficiency was poor and it was economically disadvantageous.

In addition, in the carbon dioxide absorbing device for producing soft drinks as shown in FIG. 2, which is an improved version of the device shown in FIG.
Introduce the liquid into the device, adjust the pressure of the carbon dioxide sent from the gas pipe C to a predetermined pressure with the pressure reducing valve, and inject it with the flow rate adjustment valve F while measuring the flow rate of the injected carbon dioxide gas with the carbon dioxide flow meter E. After adjusting the flow rate of carbon dioxide gas, carbon dioxide injection device B
In this method, carbon dioxide gas was directly injected into the liquid, and the carbon dioxide gas was absorbed into the liquid through a pipe G downstream from this.

The mixture of liquid and carbon dioxide that is not sufficiently absorbed in the pipe G is supplied to a gas absorption tank H having the same structure as shown in FIG. The pressure is regulated by the device J, and carbon dioxide gas is supplied to the gas absorption tank H through the flow rate control valve K and the carbon dioxide gas supply port, and in the gas absorption tank H, the device shown in FIG. Carbon dioxide gas is absorbed into the product liquid using the same principle.

The carbon dioxide absorption device for soft drink production shown in Fig. 2 is designed to improve the liquid throughput per cooling plate and reduce the pressurizing pressure for carbon dioxide absorption. Since the gas absorption efficiency cannot be made 100% in the pipe G, there is no major difference in terms of the device from the device shown in FIG.

Furthermore, even if an attempt is made to sterilize or clean the inside of the apparatus shown in FIGS. 1 and 2, the complicated structure of the apparatus makes it difficult to disassemble and clean it, and the cooling plate uses liquefied refrigerant. Since it is built-in, it is necessary to recover the refrigerant to sterilize boiling water, which is not an easy task.

The present invention relates to an improvement of a carbon dioxide absorption method that overcomes the above-mentioned difficulties, in which the liquid processing flow rate is measured by a flow meter, etc., and the liquid flow is sufficiently pressurized by a pump,
Then, carbon dioxide gas is injected at a certain ratio and flow rate into the flow and allowed to flow through the flow system pipe, and gas-liquid mixing is performed by double stirring using a fixed stirring blade and an orifice during the flow inside the flow system pipe. The present invention is characterized in that the liquid is allowed to absorb carbon dioxide gas efficiently and at low cost. As mentioned above, the liquid processing flow rate is measured by a flowmeter, etc., the liquid is sufficiently pressurized by a pump, and carbon dioxide gas is injected at a certain ratio to the flow to flow inside the flow system pipes. During the flow in the flow system pipe, gas-liquid mixing is stabilized by double stirring by a fixed stirring blade and an orifice, and then the mixture is allowed to flow into the pressure tank.
The amount of flow passing through the flow system pipe and the mixing ratio of carbon dioxide gas are always controlled to a predetermined and accurate value, and the flow is carried out under a predetermined pressurized state. After the gas bubbles are vigorously stirred and fragmented, they are further stirred again by the orifice to mix gas and liquid, so a sufficient amount of carbon dioxide gas is absorbed without the need for a particular pressure drop, resulting in a high carbon dioxide absorption amount. Moreover, high-precision products can be mass-produced with extremely high efficiency.

Furthermore, according to the uninvented carbon dioxide gas absorption method, the process of absorbing carbon dioxide gas into the liquid is continuous and simple, so the device to which the method of the present invention is applied can be significantly downsized and simplified. It is easy to disassemble and clean the device and sterilize it with boiling water.

The apparatus shown in FIG. 3 to which an embodiment of the present invention is applied will be explained below. Reference numeral 1 denotes a pipe whose one end is connected to a liquid flow meter 2, and the product liquid cooled in advance to a required temperature is passed through the pipe. 1 to the other end of the pipe 1, the liquid flow meter 2, and the check valve 4.
It is designed to be introduced into the pump 5 via.

Note that 3 is a flow rate indicator that displays the flow rate measured by the liquid flow meter 2.

Further, the pre-cooled product liquid pressurized by the pump 5 is supplied to a carbon dioxide gas injection device 6, further sent from a carbon dioxide gas supply pipe 7, pressure regulated by a pressure reducing valve 8 with a pressure gauge, passed through a solenoid valve 9, and then carbonated. The flow rate is measured by the gas flow meter 10 and the flow rate control valve 1
The carbon dioxide gas adjusted in the required amount in step 1 is also supplied to the carbon dioxide gas injection device 6.

The electromagnetic valve 9 is linked with the pump 5, and supplies carbon dioxide gas to the carbon dioxide injection device 6 only when liquid is flowing.

Furthermore, a pressure tank 16 is connected to the downstream side of the carbon dioxide gas injection device 6 via a carbon dioxide gas absorption pipe 12 equipped with a fixed stirring blade (not shown), an orifice 13, a carbon dioxide gas absorption pipe 14, and an orifice 15. is equipped with a pressure gauge 19 and a float type liquid level control device 20, and the pressure tank 16 is connected to a storage tank 2 via a liquid level control valve 20.
2, the liquid level in the pressure tank 16 is detected by a float type liquid level control device 20 and maintained at a constant liquid level in conjunction with a liquid level control valve 21.

Furthermore, the pressure tank 16 is connected to the carbon dioxide gas supply pipe 7 via a valve 17 and a pressure regulating valve 18, and the storage tank 22 is connected to the carbon dioxide gas supply pipe 7 via a carbon dioxide gas pressure reducing valve 23 and a carbon dioxide gas supply valve 24. It is connected to the gas supply pipe 7.

Since the liquid level in the storage tank 22 varies depending on the amount flowing out from the product liquid outlet pipe 29, a pressure control device is required, and the pressure control device controls the pressure.

It consists of a converter 26 that converts the pressure in the total 25 and storage tank 22 into electrical output, a pressure controller 27, and a force control valve 28.

The embodiment shown in FIG. 3 is constructed as described above, so that when the pump 5 starts operating, it is pre-cooled.

The pre-cooled product liquid is fed to the carbon dioxide gas injection device 6, and the solenoid valve 9 is opened to inject the carbon dioxide gas at a certain ratio to the flow rate of the pre-cooled product liquid. The pre-cooled product liquid stream is supplied to the gas injection device 6 and is violently agitated by a fixed agitating blade in the carbon dioxide absorption pipe 12, and the injected carbon dioxide gas bubbles are fragmented, and then the pre-cooled product liquid stream is broken up by the downstream orifice. The cooled product liquid and carbon dioxide gas are mixed with further turbulence, and the absorption of carbon dioxide gas is promoted.

And about 120~ for the pipe diameter of the carbon dioxide absorption piping 14
Orifice 15 located 30 times farther away
The pre-cooled product liquid and carbon dioxide gas are stirred and mixed again.
Carbon dioxide gas is almost completely absorbed into the pre-cooled product liquid under the pressure of the pump 5 in the flow system pipe.

Further, the product liquid that has passed through the flow system pipe and entered the pressure tank 16 is pressurized in a carbon dioxide atmosphere, so that carbon dioxide gas can be absorbed more completely.

The product liquid that has completely absorbed carbon dioxide gas in the pressure tank 16 is then quietly stored in the storage tank 22, which is regulated to the required pressure. The liquid is taken out from the outlet pipe 29.

In this way, in the above embodiment, the carbon dioxide absorption is
It is determined by the injection ratio of pre-cooled product liquid and carbon dioxide gas, so
It is easy to keep the carbon dioxide absorption concentration of the product liquid constant and the operation is simple.

Also, most of the absorption of carbon dioxide gas takes place in the pipes, so
The responsiveness of the system is extremely good.

In addition, tanks are kept to the minimum necessary (the equipment is small and mass processing is easy).

Furthermore, the device does not have any complicated mechanism, and can be easily disassembled and cleaned and sterilized with a chemical solution, and can also be sterilized with boiling water.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and the line types may be modified without departing from the spirit of the present invention.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional side view of a conventional carbon dioxide absorption device, Fig. 2 is a schematic piping diagram of another conventional carbon dioxide absorption device, and Fig. 3 is an implementation of the method for absorbing carbon dioxide in a distribution system pipe according to the present invention. It is a schematic piping diagram of the apparatus to which an example is applied. 1...Pre-cooled product liquid piping, 2...Liquid flow needle, 3...Flow rate indicator, 4...Check valve, 5... ... Pump, 6 ... Carbon dioxide gas injection device, 7 ... Carbon dioxide gas supply piping, 8 ...
...Reducing valve with pressure gauge, 9...Solenoid valve, 10...
... Carbon dioxide flow meter 1.11 ... Flow control valve, 12 ... Carbon dioxide absorption piping, 13 ...
... Orifice, 14 ... Carbon dioxide absorption piping,
15... Orifice, 16... Pressure tank, 17... Valve, 18... Pressure control valve, 19... Pressure gauge, 20 ...Float type liquid level control device, 21...Liquid level control valve, 22...
... Storage tank, 23 ... Carbon dioxide gas pressure reducing valve, 24 ... Carbon dioxide gas supply valve, ゛

Claims (1)

[Claims] 1 The liquid processing flow rate is measured by a flow meter, etc., the liquid is sufficiently pressurized by a pump, and carbon dioxide gas is injected at a certain ratio and flow rate into the flow to allow it to flow through the pipes of the distribution system. A method for absorbing carbon dioxide gas in a flow system pipe, characterized in that gas-liquid mixing is stabilized by double stirring using a fixed stirring blade and an orifice during the flow in the flow system pipe, and then the mixture is allowed to flow into a pressure tank.