JPH11300183A - Gas-liquid dispersing gas absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas-liq. dispersing gas absorber by which efficient absorption is performed, and the undissolved gas is eliminated in the process of absorbing liq. and gas. SOLUTION: The spray-type carbon dioxide absorber as the one embodiment of this gas-liq. dispersing gas absorber is provided with ejectors 20 integrated on both ends of a cylindrical impingement vessel 15a on its axis X-X and injectors 10a and 10b opposed impingingly. The injectors 10a and 10b contain a spiral mixer 11, respectively, and the vessel 15a is provided with the spray- type separation part 16a consisting of a needle valve 17 and a gas-liq. separation mesh 18 in the center of the lower part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for absorbing gas into a liquid, and more particularly to an apparatus for absorbing carbon dioxide in a carbonated beverage stock solution used for producing carbonated beverages.

[0002]

2. Description of the Related Art A carbonator having a carbocooler as shown in FIG. As shown in the figure, the carbonator includes a tank 50 and a heat exchanger 51 built in the tank 50. The heat exchanger 51 is cooled by a cooler 52 provided outside the tank 50 via a refrigerant 52a at approximately 2 ° C. A carbonic acid beverage stock solution 52 for absorbing carbon dioxide gas is allowed to flow down onto the heat transfer surface of the cooled heat exchanger 51 (wet thin film flow-down type) to increase the solubility of the stock solution, and the optimal pressure 3 to 3 for the dissolution there.
Carbon dioxide gas 53 is supplied at 5 kg / cm ² and carbonated beverage 54
Have gained.

[0003] When the above-mentioned carbonator is used, there are the following problems. That is, 1. When cleaning the inside of the tank 50 with hot water, it is necessary to remove the refrigerant (ammonia) in the heat exchanger 51. 2. At the time of starting, it is necessary to replace the air in the tank 50 with carbon dioxide gas. 3. The operation of controlling the concentration of carbon dioxide in the carbonated beverage 54 as a product is complicated. 4. Undissolved carbon dioxide is contained in the product, which causes a decrease in the yield of carbon dioxide.

Proposals have been made to utilize the undissolved residual gas, which is the undissolved carbon dioxide gas, which is the above problem, without waste. Japanese Patent Application Laid-Open No. 4-330926 discloses a proposal relating to a gas-liquid mixing device for efficiently dissolving a gas into a liquid. According to the above proposal, once a gas and a liquid are forcibly mixed by a cascade pump to form a low-concentration solution, the undissolved gas in the tank is mixed with the low-concentration solution via an injector, and the residual gas is mixed. Is used without waste.

In addition, Japanese Patent Publication No. Hei 7-509181 proposes a method of dissolving a certain amount of carbon dioxide gas in a certain amount of flowing beer. According to the above proposal, first, a gas of carbon dioxide is mixed into a liquid of beer by a mixing device, and a gas-liquid two-phase flow in which a part of the gas is dissolved through a dissolving process is introduced into a separation device. The apparatus separates into a bubble-free liquid stream and a gas-liquid two-phase stream containing undissolved gas. Then, the separated gas-liquid two-phase flow is refluxed, combined with a new gas, and introduced again into the first gas-liquid mixing process, so that an arrangement configuration in which the undissolved gas is used without waste is provided. It is.

[0006]

The above two proposals are not proposals of an efficient absorption device for reducing undissolved gas as much as possible, but merely show a method of recovering undissolved gas.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a gas-liquid dispersed gas absorbing apparatus that efficiently absorbs and eliminates undissolved gas in a liquid gas absorbing process.

[0008] In order to enable efficient absorption of the liquid in the gas absorption process, it is necessary to adopt a configuration which enables efficient dissolution in the preceding mixing process and efficient absorption in the absorption process.

[0009]

SUMMARY OF THE INVENTION Accordingly, a gas-liquid dispersed gas absorbing device according to the present invention comprises two sets each of which incorporates a spiral mixer for dispersing and mixing a gas and a liquid in an absorbing device for absorbing a gas into a liquid. And an impingement container for accommodating the injector.

Since the mixer for dispersing and mixing the gas and the liquid is constituted by a helical mixer, sufficient contact and residence time between the liquid and the gas are enabled, and in this process, a part of the gas is converted into the liquid. Dissolution absorption was enabled. When the gas and the liquid are passed under a turbulent state, the gas is finely pulverized and dispersed by a shear force caused by a strong vortex generated in the mixer.

Further, since the two sets of injectors each containing the spiral mixer are arranged in an impinge shape, the dispersion in the impinging jet caused by the jet nozzles of the two injectors opposed to each other in the impinge shape. The relative velocity between the gas and liquid particles is doubled and the chance of contact between the gas and liquid particles is doubled.

Further, the impinging jet causes an oscillation in the impingement vessel, and the contact between the gas particles and the liquid particles continues until the oscillation is attenuated. Increases.

Further, secondary re-particulation is caused by the collision shear between the gas particles and the liquid particles for a long period of time, and the contact area between the particles is increased.

The increase in the contact surface and the difference in local concentration inside cause an interface disturbance phenomenon, causing a remarkable mass transfer due to the Maragoni effect, thereby enabling efficient absorption even at room temperature.

Next, the injector according to claim 1 is
The ejector for recirculating and jetting the undissolved gas is integrated.

Since the injectors are integrated with each of the two sets of injectors, undissolved gas can be absorbed again. In addition, since the above-described integrated structure is used, compactness can be achieved.

Next, the impingement container according to claim 1 is
A separating section is provided to separate the absorbing solution in which the gas is dissolved and absorbed from the undissolved gas, and the separating section separates the droplet or liquid film containing the gas from the impingement container, and further separates the undissolved gas into the absorbing solution. It is characterized in that it is a spray type configuration that separates.

According to the above construction, a separating portion is provided at the lower portion of the impingement container, which is activated when an appropriate amount of gas-containing liquid droplets or liquid film absorbing solution is provided, and is led out of the container via the separating portion to form a gas-liquid separating mesh. The gas is separated into an undissolved gas and an absorbing solution, and the undissolved gas is returned to the impingement vessel.

Next, the impingement container according to claim 1 is
A separating section is provided to separate the absorbing solution in which the gas is dissolved and absorbed from the undissolved gas, and the separating section separates the air bubbles dispersed in the liquid and absorbs the liquid from the upper portion of the impingement container, and further dissolves the undissolved gas. It is characterized in that it has a bubble type configuration in which it is separated into a gas and an absorbing solution.

According to the above construction, a separating section is provided at the upper part of the impingement container, which is activated when the bubble pressure by the bubbles containing liquid becomes an appropriate amount, and is led out of the container via the separating section and is not dissolved by the gas-liquid separation mesh. The gas is separated into an absorbing solution and the undissolved gas is refluxed into the impingement vessel.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not merely intended to limit the scope of the present invention, but are merely illustrative examples unless otherwise specified. Absent. FIG.
In the diagram showing a schematic configuration of a spray type carbon dioxide gas absorption device which is one embodiment of the gas-liquid dispersion gas absorption device of the present invention,
FIG. 2 is a diagram showing a schematic configuration of a bubble-type carbon dioxide gas absorbing device which is another embodiment of the gas-liquid dispersed gas absorbing device as in FIG.

As shown in FIG. 1, a spray-type carbon dioxide gas absorbing device, which is a gas-liquid dispersed gas absorbing device of the present invention, has ejectors 20, 20 mounted on shaft cores XX at both left and right ends of a cylindrical impingement container 15a. Injectors 10a and 10b each having an integral structure and disposed in an impinge-like manner
And the configuration. Each of the injectors 10a and 10b has a built-in spiral mixer 11, and the impingement container 15a is provided with a spray type separator 16a including a needle valve 17 and a gas-liquid separation mesh 18 at the lower center.

In the above configuration, the impingement container 15a
The undiluted carbonated beverage is introduced into the inlets 13 and 13 of the spiral mixers 11 and 11 built in the injectors 10a and 10b, respectively, which are disposed opposite to each other in the shape of an impinge on the axis XX of the core. , 12 are supplied with carbon dioxide gas, and the nozzles 14, 1 of the injectors 10a, 10b are introduced.
The gas-liquid mixture dispersed and mixed from 4 is jetted in a turbulent swirl shape to form a collision jet. As a result, the carbon dioxide gas and the carbonated beverage undiluted solution introduced from the inlets 12 and 13 of the spiral mixer 11 are mixed in a gas-liquid dispersion state and are the carbonated beverage undiluted solution in a long mixing process up to the mixer outlet. It allows sufficient contact and residence time between the liquid and the gas, which is carbon dioxide, with some of the gas remaining dissolved in the liquid. When the gas and the liquid are passed in a turbulent state, the gas is finely pulverized and dispersed in the liquid by a shearing force caused by a strong vortex generated in the mixer.

The injectors 10 provided in the form of two sets of impingements via the mixer 11 are opposed to each other.
a and 10b are jetted from the nozzles 14 and 14 to form an impinging jet. As a result, the gas-liquid mixture flows at twice the relative velocity between the dispersed gas particles and the liquid particles, The chance of contact between the particles and the liquid particles is doubled.

The impinging jet causes an oscillation in the impingement vessel, and the contact between the gas particles and the liquid particles continues until the oscillation is attenuated. Increases.

The long-term collision shear between the gas particles and the liquid particles causes secondary re-micronization to increase the contact area therebetween.

Due to the local concentration difference between the contact surface and the inside, an interface disturbance phenomenon is caused to cause a remarkable mass transfer due to the Maragoni effect, and the lower space in the impingement container 15a contains a solution of a carbonated beverage solution containing carbon dioxide. Drops or liquid film fills. When the filled droplet or liquid film reaches an appropriate amount, the needle valve 17 of the separation unit 16a is operated to separate the droplet or liquid film out of the impingement container. Separate into dissolved carbon dioxide. The separated undissolved carbon dioxide gas is supplied to the ejectors 20, 20.
Is recirculated to the inlets 20a, 20a of the fuel cell 10 and merges with the gas-liquid mixture ejected from the nozzles 14, 14 of the injectors 10a, 10b to participate again in mass transfer between gas and liquid. It will not be released to the outside.

FIG. 2 is a diagram schematically showing the structure of a bubble-type carbon dioxide gas absorption device which is a gas-liquid dispersion gas absorption device as in FIG. As shown in FIG. 2, the bubble-type carbon dioxide gas absorption device, which is the gas-liquid dispersion gas absorption device of the present invention, has ejectors 20 and 20 integrally formed on shaft cores XX at both left and right ends of a cylindrical impingement container 15b. And the injectors 10a and 10b which are disposed to face each other in an impingement manner. Each of the injectors 10a and 10b has a built-in helical mixer 11, and the impingement container 15b has a bubble type separator 16b including a needle valve 17 and a gas-liquid separation mesh 18 at the upper center.

In the above configuration, similarly to FIG. 1, the spiral mixers 11, 1 built in the injectors 10a, 10b are arranged.
Introducing the undiluted carbonated beverage into the inlets 13 and 13 and introducing carbon dioxide gas into the inlets 12 and 12
The gas-liquid mixture mixed in a dispersed manner from 4 and 14 is respectively jetted in a turbulent swirl to form an impinging jet. As a result, through the same process as in FIG. 1, an interface disturbance phenomenon occurs due to an increase in the gas-liquid contact surface and a local concentration difference inside, causing remarkable mass transfer due to the Maragoni effect.
The upper space in 5b is filled with bubbles containing the undiluted solution of the carbonated beverage. When the number of filled bubbles reaches an appropriate amount, the separation unit 16
b of the impingement container 1
5b and separated by a gas-liquid separation mesh 18 into carbonated drinking water and undissolved carbon dioxide gas. The separated undissolved carbon dioxide gas is supplied to the intake port 20 of the ejector 20.
a, 20a, and new injectors 10a, 10a
b, the liquid and the gas-liquid mixture ejected from the nozzles 14 and 14 are combined to participate again in the mass transfer between gas and liquid, and the undissolved carbon dioxide gas is not discharged to the outside and discarded.

[0030]

According to the above configuration, in the process of absorbing gas of liquid, efficient absorption at normal temperature and no undissolved gas can be eliminated.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a spray-type carbon dioxide gas absorbing device showing one embodiment of a gas-liquid dispersed gas absorbing device of the present invention.

FIG. 2 is a diagram showing a schematic configuration of a bubble-type carbon dioxide gas absorbing device showing another embodiment of the gas-liquid dispersed gas absorbing device as in FIG.

FIG. 3 is a diagram showing a schematic configuration of a conventional carbon dioxide absorbing device used for a carbonated beverage.

[Explanation of symbols]

 10a, 10b Injector 11 Spiral mixer 12, 13, Input port 14 Nozzle 15a, 15b Impingement container 16a, 16b Separator 17 Needle valve 18 Gas-liquid separation mesh 20 Ejector

Claims (4)

[Claims] 1. An absorber for absorbing a gas into a liquid, comprising: two sets of injectors each having a built-in spiral mixer for dispersing and mixing the gas and the liquid and arranged in an impinge shape;
A gas-liquid dispersed gas absorbing device, comprising: an impingement container for accommodating the two sets of injectors. 2. The gas-liquid dispersed gas absorbing device according to claim 1, wherein an ejector for ejecting undissolved gas is integrally formed with each nozzle of the two sets of injectors. 3. The impingement container is provided with a separation part for separating an absorption solution in which gas is dissolved and absorbed from an undissolved gas, and the separation part separates a droplet or a liquid film containing gas from the impingement container in a timely manner. 2. The gas-liquid dispersed gas absorbing device according to claim 1, wherein said gas-liquid dispersed gas absorbing device further comprises a spray type structure for separating into an undissolved gas and an absorbing solution. 4. The impingement container is provided with a separation section for separating an absorption solution in which gas is dissolved and absorbed from an undissolved gas,
2. The bubble separation system according to claim 1, wherein the separation unit is configured to appropriately separate the air bubbles dispersed in the liquid and absorbing the liquid from the impingement container, and further to separate the undissolved gas and the absorption solution. Gas-liquid dispersion gas absorption device.