Dissolution method

Abstract

This invention dissolves efficiently a water-soluble component contained in a gas in a liquid by reducing energy consumption. A dissolution method is for dissolving a water-soluble component of a dissolution gas in a liquid, the dissolution method comprising: converting a liquid 9 into a fine mist by ultrasonic vibration or electrostatic atomization, mixing the mist with conveying air to obtain mist-containing air, supplying the dissolution gas and the mist-containing air to a static mixer 2, mixing the dissolution gas and the mist-containing air by the static mixer 2 to bring liquid mist into contact with the dissolution gas and dissolve the water-soluble component of dissolution gas, and condensing the liquid mist in which the water-soluble component has been dissolved to obtain a solution in which the water-soluble component is dissolved.

Description

[Technical Field]

[0001] The present invention relates to a method for dissolving a water-soluble component contained in a dissolved gas in a liquid. [Background technology]

[0002] Methods using static mixers to mix gases or gases and liquids have been developed (see Patent Documents 1 to 3). Patent Document 1 describes a desorption device that mixes ozone and gas containing malodorous substances using a static mixer, and Patent Documents 2 and 3 disclose devices that use a static mixer to mix fuel and air supplied to a spark ignition engine. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-267023 [Patent Document 2] Japanese Patent Application Publication No. 7-42620 [Patent Document 3] Japanese Patent Application Publication No. 10-281012 Summary of the Invention [Problem to be solved by the invention]

[0004] The static mixer in Patent Document 1 efficiently mixes gas containing malodorous substances with ozone, effectively deodorizing the malodorous substances through the action of the ozone. The static mixers in Patent Documents 2 and 3 uniformly mix fuel and air. By supplying fuel uniformly mixed with air to a spark-ignition engine, variations in the engine's exhaust temperature are eliminated, improving combustion efficiency, and achieving complete treatment of exhaust gases using a three-way catalytic converter. The static mixers described in the above publications uniformly mix gases and gases or fuel and air without using power.

[0005] As described in the above publications, static mixers can efficiently mix two fluids without consuming power, but when mixing a liquid and a gas, the contact area between the liquid and the gas can be increased by bringing the liquid into contact with the gas in the form of a fine liquid mist, which allows the water-soluble components contained in the gas to be efficiently dissolved in the liquid.

[0006] A fine liquid mist can be produced by ultrasonically vibrating a liquid and separating it from the liquid using the vibration energy, or by spraying the liquid from a sprayer and electrostatically atomizing it. Ultrasonic vibration and electrostatic atomization have the advantage of being able to turn a liquid into an extremely fine liquid mist. Because the fine liquid mist comes into contact with the gas over an extremely large contact area, it can efficiently dissolve the water-soluble components contained in the gas into the liquid. However, the fine liquid mist is prone to evaporating and becomes a gas, which makes it unable to dissolve the water-soluble components of the gas. Therefore, even if the contact area is increased by turning the liquid into a fine liquid mist, the water-soluble components contained in the gas are not efficiently dissolved into the liquid. Therefore, even if the liquid is turned into a fine liquid mist, the water-soluble components contained in the gas cannot be efficiently dissolved into the liquid, and there is a drawback in that dissolving the water-soluble components requires a large amount of energy.

[0007] The present invention was developed with the aim of overcoming the above drawbacks, and an important object of the present invention is to provide a dissolving method that can efficiently dissolve water-soluble components contained in gas into liquid while reducing energy consumption. [Means for solving the problem]

[0008] A dissolution method according to one embodiment of the present invention is a method for dissolving water-soluble components of a dissolved gas into a liquid, in which the liquid 9 is converted into a fine mist by ultrasonic vibration or electrostatic atomization, this mist is mixed with conveying air to form mist-containing air, the dissolved gas and the mist-containing air are supplied to a static mixer 2, the static mixer 2 mixes the dissolved gas and the mist-containing air, and the liquid mist is brought into contact with the dissolved gas to dissolve the water-soluble components of the dissolved gas into the liquid mist, and the liquid mist with the dissolved water-soluble components is agglomerated to obtain a solution with the dissolved water-soluble components. [Effects of the Invention]

[0009] The above dissolution method has the advantage that the water-soluble components of the dissolved gas can be efficiently dissolved in the liquid with less energy consumption. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a block diagram of a melting apparatus used in a melting method according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram of an atomizer of the dissolving apparatus shown in FIG. [Figure 3] FIG. 2 is an enlarged cross-sectional view showing the connection structure of the ultrasonic transducer. [Figure 4] FIG. 1 is a schematic perspective view showing an example of a static mixer. [Figure 5] FIG. 10 is a block diagram of a melting apparatus used in a melting method according to another embodiment of the present invention. [Figure 6] FIG. 2 is an enlarged cross-sectional view showing the structure of the spray unit. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention will be described in detail below with reference to the drawings. In the following description, terms indicating specific directions or positions (e.g., "upper," "lower," and other terms including these terms) will be used as necessary. However, the use of these terms is intended to facilitate understanding of the invention with reference to the drawings, and the meaning of these terms does not limit the technical scope of the present invention. Furthermore, parts that appear with the same reference numerals in multiple drawings indicate the same or equivalent parts or components. Furthermore, the embodiments shown below are specific examples of the technical concept of the present invention and are not intended to limit the present invention thereto. Furthermore, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described below are intended as examples and are not intended to limit the scope of the present invention thereto. Furthermore, the content described in one embodiment or example can also be applied to other embodiments or examples. Furthermore, the sizes and positional relationships of components shown in the drawings may be exaggerated for clarity of explanation. In this specification, the term "static mixer" refers to a mixer that does not have any internal power source and mixes a plurality of fluids by utilizing the inertial force of the fluids.

[0012] A dissolving method according to one embodiment of the present invention is a method for dissolving a water-soluble component of a dissolved gas in a liquid, the method comprising: supplying the dissolved gas and mist-containing air to a static mixer 2; mixing the dissolved gas and mist-containing air with the static mixer 2; adjusting the air flow rate of the mist-containing air to adjust the relative humidity inside the static mixer and maintain the liquid mist in a granular state; The liquid mist is brought into contact with the dissolved gas to dissolve the water-soluble components of the dissolved gas into the liquid mist, and the liquid mist with the dissolved water-soluble components is coagulated to obtain a solution with the dissolved water-soluble components.

[0013] The above dissolution method involves supplying a dissolved gas containing a water-soluble component and a liquid mist atomized by ultrasonic vibration to a static mixer. The liquid mist and the dissolved gas are then brought into contact with each other over a wide area in the static mixer, dissolving the water-soluble component of the dissolved gas into the liquid mist. The liquid mist containing the dissolved water-soluble component is then condensed to obtain a solution. The above dissolution method involves mixing the liquid mist with the gaseous water-soluble component in the static mixer, dissolving the gaseous water-soluble component into the liquid mist. In this state, the gaseous water-soluble component is mixed with the mist atomized into fine liquid droplets, resulting in an extremely large contact area between the liquid mist and the gaseous water-soluble component, allowing the water-soluble component to quickly dissolve into the liquid. It is important to maintain the mist in a liquid state so that it can come into contact with the water-soluble component. No matter how efficiently the vaporized mist and the water-soluble component are mixed, the water-soluble component will not dissolve in the liquid. In order to efficiently dissolve the water-soluble component in the liquid, the static mixer mixes the granular liquid mist with the water-soluble component, thereby efficiently dissolving the water-soluble component in the liquid. Furthermore, the liquid mist with the dissolved water-soluble component is agglomerated to obtain a solution of the water-soluble component. The above method mixes the liquid mist and the water-soluble component over an extremely wide contact area, so the water-soluble component is quickly dissolved in the mist and liquid. Furthermore, this mist is agglomerated to obtain a solution with the dissolved water-soluble component, thereby enabling the water-soluble component to be dissolved extremely efficiently in the liquid. Therefore, for example, the method can be used to convert the water-soluble component into an odorous gas, allowing the odorous gas to be efficiently dissolved in the liquid for deodorization.

[0014] A second aspect of the present invention is a dissolution method for dissolving water-soluble components of a dissolved gas in a liquid, which comprises spraying the liquid with a sprayer and electrostatically atomizing it to form a fine mist, mixing the fine mist with conveying air to form mist-containing air, supplying the dissolved gas and mist-containing air to a static mixer, mixing the dissolved gas and mist-containing air in the static mixer, bringing the liquid mist into contact with the dissolved gas to dissolve the water-soluble components of the dissolved gas into the liquid mist, and agglomerating the liquid mist with the dissolved water-soluble components to obtain a solution with the dissolved water-soluble components.

[0015] The above dissolution method involves supplying a dissolved gas containing a water-soluble component and a liquid mist atomized by electrostatic atomization to a static mixer. The liquid mist and the dissolved gas are then brought into contact with each other over a wide area in the static mixer, dissolving the water-soluble component of the dissolved gas into the liquid mist. The liquid mist containing the dissolved water-soluble component is then coagulated to obtain a solution. The above dissolution method involves mixing the liquid mist with the gaseous water-soluble component in the static mixer, dissolving the gaseous water-soluble component into the liquid mist. In this state, the gaseous water-soluble component is mixed with the mist atomized into fine liquid droplets, resulting in an extremely large contact area between the liquid mist and the gaseous water-soluble component, allowing the water-soluble component to quickly dissolve into the liquid. It is important to maintain the mist in a liquid state so that it can come into contact with the water-soluble component. No matter how efficiently the vaporized mist and the water-soluble component are mixed, the water-soluble component will not dissolve in the liquid. In order to efficiently dissolve the water-soluble component in the liquid, the static mixer mixes the granular liquid mist with the water-soluble component, thereby efficiently dissolving the water-soluble component in the liquid. Furthermore, the liquid mist with the dissolved water-soluble component is agglomerated to obtain a solution of the water-soluble component. The above method mixes the liquid mist and the water-soluble component over an extremely wide contact area, so the water-soluble component is quickly dissolved in the mist and liquid. Furthermore, this mist is agglomerated to obtain a solution with the dissolved water-soluble component, thereby enabling the water-soluble component to be dissolved extremely efficiently in the liquid. Therefore, for example, the method can be used to convert the water-soluble component into an odorous gas, allowing the odorous gas to be efficiently dissolved in the liquid for deodorization.

[0016] In the dissolving method according to the third aspect of the present invention, the flow rate of the mist-containing air is adjusted to maintain the liquid mist in a granular state within the static mixer.

[0017] The above method maintains the mist in the static mixer as a liquid mist using the air flow rate of the mist-containing air. The static mixer can reduce the relative humidity inside by reducing the air flow rate of the mist-containing air. A static mixer with reduced relative humidity suppresses the amount of liquid mist that evaporates, increasing the concentration of the liquid mist. A state in which a high concentration of liquid mist is mixed with a water-soluble component increases the contact area between the liquid mist and the water-soluble component, allowing the water-soluble component to be efficiently dissolved into the mist liquid. In particular, by maintaining a supersaturated state with a relative humidity exceeding 100%, the static mixer reliably suppresses the evaporation of the liquid mist, particularly increasing the concentration of the liquid mist and more efficiently dissolving the water-soluble component.

[0018] The dissolving method according to the fourth aspect of the present invention detects the temperature or humidity inside the static mixer and adjusts the flow rate of air forced into the liquid column.

[0019] A rise in temperature inside a static mixer causes a decrease in the internal relative humidity. A static mixer with a low relative humidity can cause the liquid mist to evaporate. Therefore, by detecting the temperature and humidity inside the static mixer and adjusting the flow rate of forced air into the static mixer, the decrease in relative humidity inside the static mixer can be suppressed, maintaining a high concentration of liquid mist and allowing the water-soluble component to come into contact with the mist over a wide contact area, thereby efficiently dissolving the water-soluble component into the liquid. Because the static mixer forces air into the liquid column, reducing the flow rate of forced air into the static mixer reduces the flow rate of air forced into the liquid column, resulting in a decrease in atomization efficiency. This is because the forced air cannot efficiently separate the mist from the surface of the liquid column. A dissolution method that detects the temperature and humidity inside the static mixer and adjusts the flow rate of forced air can control the flow rate of forced air so that the relative humidity inside the static mixer does not fall below the set value. Therefore, the method of detecting the temperature and humidity inside the static mixer and controlling the flow rate of the air being blown in can adjust the amount of air being blown into the static mixer, taking into account both the decrease in concentration of the liquid mist and the efficiency of mist separation from the liquid column. This has the advantage that the atomization efficiency of the mist can be maintained higher than the set value without restricting the contact area between the liquid mist and the water-soluble component.

[0020] A fifth aspect of the present invention provides a dissolving method, wherein the dissolved gas contains air, and the dissolved gas containing air is supplied to a static mixer at a flow rate of 1000 rpm. and the air flow rate of mist-containing air is adjusted to maintain the liquid mist in a granular form within the static mixer.

[0021] The relative humidity inside the static mixer changes depending on the amount of dissolved gas supplied. As the amount of dissolved gas supplied increases, the relative humidity inside the static mixer decreases, making it easier for the liquid mist to evaporate. This is because an increase in the amount of dissolved gas supplied increases the amount of gas supplied from the dissolved gas relative to the amount of liquid mist condensed inside the static mixer. A method for controlling the flow rate of dissolved gas supplied to the static mixer is to suppress the flow rate of the dissolved gas supplied, maintain the relative humidity inside the static mixer above a predetermined value, increase the concentration of the liquid mist, and bring the high-concentration liquid mist into contact with the water-soluble components over a wide area, allowing the water-soluble components to be efficiently dissolved into the liquid mist.

[0022] The dissolving method according to the sixth aspect of the present invention detects the temperature inside the static mixer and adjusts the flow rate of the dissolved gas containing air that is supplied to the static mixer.

[0023] The dissolving method according to the seventh aspect of the present invention is characterized in that the temperature in the static mixer is and the air flow rate of mist-containing air is adjusted to maintain the liquid mist in a granular form within the static mixer.

[0024] In the dissolving method according to the eighth aspect of the present invention, the amount of liquid mist supplied to the static mixer is and the air flow rate of mist-containing air is adjusted to maintain the liquid mist in a granular form within the static mixer.

[0025] A dissolving method according to a ninth aspect of the present invention detects the temperature inside the static mixer, and adjusts the amount of liquid mist to be supplied to the static mixer at the detected temperature.

[0026] In the dissolving method according to the tenth aspect of the present invention, the temperature of the dissolving gas supplied to the static mixer is and the air flow rate of mist-containing air is adjusted to maintain the liquid mist in a granular form within the static mixer.

[0027] The dissolution method according to the eleventh aspect of the present invention supplies air to the dissolution gas, and adjusts the amount of air supplied to the dissolution gas to adjust the temperature of the dissolution gas supplied to the static mixer.

[0028] In the dissolving method according to the twelfth aspect of the present invention, the water-soluble components of the dissolved gas include any of odorous components, ammonia, alcohol, volatile organic compounds (VOCs), soot, NOX, and SOX.

[0029] A dissolving method according to a thirteenth aspect of the present invention is characterized in that the liquid that dissolves the water-soluble components of the dissolved gas is any one of water, alkaline water, and acidic water.

[0030] (Embodiment 1) Fig. 1 shows a block diagram of a dissolving apparatus 100 used in a dissolving method for dissolving water-soluble components contained in dissolved gas into a liquid. The dissolving apparatus 100 in this figure includes an atomizer 1 that converts a liquid 9 into mist by ultrasonic vibration, a static mixer 2 that mixes the mist-containing air supplied from the atomizer 1 with the dissolved gas, and a collector 3 that is connected to the static mixer 2 and condenses and collects the mist.

[0031] The device shown in Figure 1 is used in a dissolution method for dissolving and recovering water-soluble components contained in dissolved gas, such as odor components, ammonia, alcohol, and volatile organic compounds (VOCs), or for dissolving and removing water-soluble components contained in dissolved gas. The liquid 9 for dissolving the water-soluble components is selected to be optimal for the water-soluble components. For example, a method for dissolving odor components to deodorize uses water as the liquid 9, while a method for recovering ammonia, alcohol, and volatile organic compounds uses a liquid 9 for dissolving alkaline or acidic water. For example, acidic water such as a hydrochloric acid solution is used to dissolve and recover ammonia contained in dissolved gas. When ammonia-containing gas comes into contact with a hydrochloric acid solution, the ammonia combines as ammonium ions and the hydrochloric acid combines as chloride ions to form aluminum chloride, which dissolves in the water. A liquid that can quickly dissolve water-soluble components is selected as the liquid 9 for dissolving the water-soluble components contained in dissolved gas, allowing for efficient dissolution and recovery of the water-soluble components.

[0032] In the dissolving apparatus 100 of Figure 1, in order to increase the contact area between the dissolving gas and the liquid, the liquid is ultrasonically vibrated to form a fine mist, which is then supplied to a static mixer 2, and the mist in which the water-soluble components have been dissolved by the static mixer 2 is collected in a collector 3. In the dissolving apparatus 100 of Figure 1, the liquid 9 is converted into a mist by an atomizer 1, and the mist in which the water-soluble components have been dissolved is condensed and collected by a cyclone 3A. The atomizer 1 includes an atomization chamber 10 that stores the liquid 9 to be atomized into a mist, an ultrasonic vibrator 11 that ultrasonically vibrates the liquid 9 to cause a liquid column P to protrude from the liquid surface W, and a high-frequency power source 12 that is connected to the ultrasonic vibrator 11 and supplies high-frequency power to the ultrasonic vibrator 11 to cause it to ultrasonically vibrate, and a blower 20 that blows a carrier gas into the atomization chamber 10.

[0033] The atomization chamber 10 is a closed chamber that stores liquid 9 at a constant liquid level W. The liquid 9 is atomized into mist inside, and the atomized mist is mixed with a carrier gas and discharged to the outside as mist-containing air. However, the atomization chamber can be partially open without being completely sealed. The atomization chamber 10 shown in FIG. 2 has a supply port 13 for liquid 9 located below the liquid level. An overflow port 14 is also provided to maintain a constant level of the supplied liquid 9. Liquid 9 is supplied through the supply port 13 and discharged through the overflow port 14. While the overflow port 14 maintains a constant liquid level in the atomization chamber 10, the amount of liquid supplied through the supply port 13 can also be controlled to maintain a constant liquid level. The atomization chamber 10, which maintains a constant liquid level, can maintain the depth of the liquid 9 ultrasonically vibrated by the ultrasonic vibrator 11 at a depth that allows for the most efficient atomization.

[0034] The liquid 9 is supplied to the atomization chamber 10 by a supply mechanism 15. The supply mechanism 15 shown in Fig. 2 includes a liquid tank 16 that stores the liquid 9 to be supplied to the atomization chamber 10, and a liquid pump 17 that supplies the liquid 9 from the liquid tank 16 to the atomization chamber 10. The liquid pump 17 has an intake side connected to the liquid tank 16 and an exhaust side connected to the atomization chamber 10. The supply mechanism 15 uses the liquid pump 17 to continuously supply the liquid 9 from the liquid tank 16 to the atomization chamber 10.

[0035] As shown in the enlarged cross-sectional view of Fig. 3, the ultrasonic vibrator 11 is fixed so as to watertightly close the opening 18A provided in the bottom plate 18 of the atomization chamber 10. The ultrasonic vibrator 11 has an electrode provided on its underside connected to a high-frequency power supply 12, and is ultrasonically vibrated by power supplied from the high-frequency power supply 12. The high-frequency power supply 12 is connected to the ultrasonic vibrator 11 via a lead wire 19 and outputs a high-frequency output to the ultrasonic vibrator 11.

[0036] As shown in Figure 2, the blower 20 blows air as a carrier gas for the mist into the liquid column P generated by ultrasonic vibration. The air is blown onto the surface of the liquid column P, dispersing the mist on the surface of the liquid column into the air, creating mist-containing air. The blower 20 is controlled by the controller 4 to adjust the amount of air supplied to the atomization chamber 10.

[0037] In the atomizer 1 described above, the ultrasonic vibrator 11 is positioned horizontally, causing the liquid column P to protrude vertically from the liquid surface W. The atomizer 1 can also be positioned with the ultrasonic vibrator 11 in an inclined position, causing the liquid column P to protrude in an inclined position relative to the liquid surface W. The atomizer 1 shown in the figures is equipped with one ultrasonic vibrator 11, but it is also possible to provide multiple ultrasonic vibrators to increase the amount of mist atomized per unit time. The amount of mist generated can also be adjusted by the output of the ultrasonic vibrator 11.

[0038] The atomizer 1 in Fig. 1 is equipped with an air heater 21 that heats the air and a liquid heater 22 that heats the liquid 9. By heating the air and the liquid 9, the atomizer 1 can increase the atomization efficiency and generate a larger amount of mist per unit time. The air heater 21 and the liquid heater 22 are controlled by the controller 4 to adjust the air temperature and the liquid temperature.

[0039] The static mixer 2 efficiently mixes the supplied mist-containing air with the dissolved gas, dissolving the water-soluble components of the dissolved gas into the mist liquid. The dissolving apparatus 100 of FIG. 1 includes a supply fan 5 that supplies the dissolved gas to the static mixer 2 and an outside air fan 6 that supplies outside air. The supply fan 5 is controlled by the controller 4 to adjust the amount of dissolved gas supplied. The outside air fan 6 is controlled by the controller 4 to adjust the amount of outside air supplied. The dissolving apparatus 100 of FIG. 1 also includes a cooler 7 that cools the dissolved gas. The cooler 7 cools the dissolved gas and supplies it to the static mixer 2. The cooler 7 is also controlled by the controller 4 to adjust the cooling temperature of the dissolved gas.

[0040] The temperature of the dissolved gas supplied to the static mixer 2 can be lowered to prevent the mist from evaporating within the static mixer 2. If the temperature of the dissolved gas is high, the temperature within the static mixer 2 will rise, reducing the relative humidity and making it easier for the mist to evaporate. The temperature of the dissolved gas can be lowered by supplying outside air, which is cooler than the dissolved gas, from the outside air fan 6, and the temperature can also be lowered by cooling the dissolved gas in the cooler 7 before supplying it to the static mixer 2.

[0041] The static mixer 2 mixes flowing dissolved gas and mist-containing air. The static mixer 2 shown in the schematic perspective view of FIG. 4 has elements 26 arranged in multiple stages inside a tubular member 25. The static mixer 2 transports and mixes the dissolved gas and mist-containing air flowing through the tubular member 25 by reversing their directions between right and left and between up and down through the elements 26 arranged in multiple stages. The elements 26 are rectangular plates twisted 180 degrees, with the inner diameter of the tubular member 25 as the width direction and preferably a length 1.5 times the width direction. Right elements 26A twisted to the right and left elements 26B twisted to the left are alternately arranged in the flow direction. Adjacent right elements 26A and left elements 26B are arranged in the tubular member 25 with their boundaries perpendicular to each other. Each time the static mixer 2 flows into an adjacent element 26, it is divided into two and flows into the downstream element 26, where the rotation direction is reversed. The static mixer 2 can mix the dissolved gas and mist-containing air more uniformly by increasing the number of stages of the alternatingly arranged right elements 26A and left elements 26B. The static mixer 2 is divided into two each time it flows into an adjacent element 26. For example, a static mixer 2 with 20 stages of right elements 26A and left elements 26B can be divided into two. 20 (1,048,576 times), which efficiently mixes the dissolved gas and mist-containing air and efficiently moves the dissolved gas and mist relative to each other, dissolving the water-soluble components of the dissolved gas into the mist liquid. In the static mixer 2, the overall length of the right element 26A and the left element 26B is shortened to 1.5 times the width, and by increasing the number of elements 26 arranged in multiple stages, the water-soluble components of the dissolved gas can be efficiently dissolved into the mist liquid while keeping the overall length short. However, lengthening the elements 26 is also effective in efficiently dissolving the water-soluble components into the mist liquid.

[0042] When the mist is in a liquid state, it can dissolve the water-soluble components of the dissolved gas. When the mist evaporates, the water-soluble components cannot be dissolved in the liquid. In order to efficiently dissolve the water-soluble components of the dissolved gas into the liquid, it is important that the static mixer 2 transports the mist while minimizing evaporation. Evaporation of the mist can be suppressed by keeping the static mixer 2 in a supersaturated state, i.e., at a temperature lower than the dew point temperature. To suppress evaporation of the mist within the static mixer 2, the static mixer 2 is equipped with a temperature sensor 27 that detects the internal temperature and a humidity sensor 28 that detects humidity.

[0043] The controller 4 controls the environment inside the static mixer 2 to suppress mist evaporation using signals input from the temperature sensor 27 and humidity sensor 28. The controller 4 in Figure 1 suppresses mist evaporation inside the static mixer 2 by adjusting the temperature and flow rate of the mist-containing air and dissolved gas. The controller 4 adjusts the flow rate and temperature of the carrier gas supplied to the atomizer 1, and also adjusts the temperature of the ultrasonically vibrated liquid to control the temperature and humidity of the mist-containing air supplied to the static mixer 2. When the temperature of the mist-containing air is high and the air flow rate is high, the relative humidity inside the static mixer 2 decreases, making it easier for the mist to evaporate. Therefore, the controller 4 detects the temperature and humidity inside the static mixer 2 and adjusts the air heater 21 and liquid heater 22 to keep the internal relative humidity within the set range, and also controls the flow rate of the air supplied to the atomizer 1. Furthermore, the controller 4 also adjusts the flow rate of the dissolved gas and the flow rate of the outside air supplied to the dissolved gas to keep the relative humidity in the static mixer 2 within a set range, preferably a supersaturated state with a relative humidity of 100% or higher, i.e., below the dew point temperature, thereby effectively suppressing the evaporation of mist.

[0044] The atomizer 1 can increase the atomization efficiency by increasing the flow rate of air blown into the liquid column P and raising the air temperature. Furthermore, heating the liquid 9 and raising its temperature is also effective in increasing atomization efficiency. Therefore, the controller 4 adjusts the flow rate and temperature of the air supplied to the liquid column P, taking atomization efficiency into consideration. Increasing the air flow rate and raising the temperature increases the atomization efficiency, but also increases the rate at which mist evaporates within the static mixer 2. Therefore, the controller 4 detects the temperature and humidity within the static mixer 2 and adjusts the flow rate and temperature of the air supplied to the liquid column P by the atomizer 1. The controller 4 preferably sets a high air flow rate and a high temperature while maintaining a supersaturated or nearly supersaturated state of moisture within the static mixer 2, thereby increasing atomization efficiency and suppressing mist evaporation. The atomizer 1 equipped with the liquid heater 22 increases the temperature of the heated liquid within the static mixer 2 to the extent that a supersaturated or nearly supersaturated state can be maintained.

[0045] The flow rate and temperature of the dissolved gas supplied to the static mixer 2 change the amount of mist evaporation within the static mixer 2. If the dissolved gas is a high-temperature gas containing water vapor and is cooled below the dew point temperature before being supplied to the static mixer 2, the supply of the dissolved gas will not promote the evaporation of mist within the static mixer 2. However, if dissolved gas with a temperature higher than the dew point and a low relative humidity is supplied to the static mixer 2, the relative humidity within the static mixer 2 will decrease, promoting the evaporation of mist. In particular, if a large amount of low-humidity dissolved gas is supplied to the static mixer 2, the relative humidity within the static mixer 2 will decrease, promoting the evaporation of mist. In this state, the dissolved gas can be cooled to increase the relative humidity, or the relative humidity of the mist-containing air supplied from the atomizer 1 can be reduced, maintaining the relative humidity within the static mixer 2 above the set range.

[0046] The high-temperature dissolved gas is cooled in a heat exchanger (not shown), and as shown in Figure 1, outside air, which is cooler than the dissolved gas, is supplied to cool it and supplied to static mixer 2. The heat exchanger preferably cools the dissolved gas to below the dew point temperature before supplying it to static mixer 2. When mixing the dissolved gas with outside air to cool it, the relative humidity of the outside air is preferably increased, which cools the dissolved gas and increases its relative humidity.

[0047] The collector 3 aggregates and collects the mist containing dissolved water-soluble components of the dissolved gas. The collector 3 in Figure 1 is a cyclone 3A. The mist containing dissolved water-soluble components flows tangentially into the cyclone 3A, where it rotates and adheres to the inner surface of the cyclone 3A by centrifugal force, where it aggregates and is discharged from the bottom. The gas components of the air containing the dissolved gas and mist are discharged to the outside through a discharge pipe 31 located in the center of the cyclone 3A.

[0048] In the dissolving apparatus 100 described above, dissolved gas and mist-containing air are supplied to the static mixer 2, where the water-soluble components of the dissolved gas are dissolved into a liquid mist. The mist containing the dissolved water-soluble components is then condensed and collected in the cyclone 3A of the collector 3 to produce a solution containing the dissolved water-soluble components. The atomizer 1 ultrasonically vibrates the liquid to form a liquid column P protruding from the liquid surface, and forced air is blown into this liquid column P by the blower 20 to separate the mist from the liquid column P and produce mist-containing air. The mist-containing air and dissolved gas are supplied to the static mixer 2, where they are mixed and the liquid mist is brought into contact with the dissolved gas to dissolve the water-soluble components of the dissolved gas into the liquid mist. The liquid mist containing the dissolved water-soluble components is then condensed in the cyclone 3A of the collector 3 to produce a solution containing the dissolved water-soluble components. The controller 4 detects the temperature and humidity inside the static mixer 2, and maintains the temperature inside the static mixer 2 preferably below the dew point temperature, and adjusts the air flow rate and air temperature of the carrier gas condensing in the atomizer 1, the temperature at which the liquid is heated, and also adjusts the flow rate and temperature of the dissolution gas, so that the dissolution gas and mist come into contact with each other inside the static mixer 2 and dissolve the water-soluble components into the mist. The mist with the dissolved water-soluble components is collected by the cyclone 3A.

[0049] (Embodiment 2) The dissolving device described above uses ultrasonic vibrations to turn the liquid into a fine mist, but the liquid can also be sprayed from a sprayer and turned into a fine mist by electrostatic atomization. The dissolving device 200 shown in FIG. 5 includes an electrostatic atomizer 40 that sprays the liquid 9 into a fine mist from a sprayer 41. The electrostatic atomizer 40 has the sprayer 41 mounted on top of a closed spray case 47, and sprays the liquid from top to bottom. Furthermore, the electrostatic atomizer 40 has an atomization electrode 42 disposed inside the spray case 47 that turns the mist sprayed from the sprayer 41 into a fine mist by the action of static electricity.

[0050] The electrostatic atomizer 40 shown in Figure 5 has a sprayer 41 made up of multiple spray units 50 mounted in a spray case 47. The spray unit 50 is shown in Figure 6. The spray unit 50 shown in this figure has multiple capillary tubes 53 fixed in parallel to a nozzle block 54. The capillary tubes 53 are thin metal tubes with an inner diameter of 0.1 mm to 0.2 mm, and spray pressurized liquid from the tip to form a mist.

[0051] The nozzle block 54 has a flange-shaped flange 54a on its outer periphery and multiple capillary tubes 53 mounted in its center. The nozzle block 54 shown in FIG. 6 includes a main body 54A with a flange 54a and a plate 54B with capillary tubes 53 secured thereto, which is screwed to the main body 54A. The plate 54B has through-holes 54x through which the capillary tubes 53 are inserted. The inner shape of the through-holes 54x is approximately the same as the outer shape of the capillary tubes 53, allowing the capillary tubes 53 to pass through with almost no gaps. To prevent leakage between the capillary tubes 53 and the through-holes 54x, a packing 55 is disposed on the inner surface of the plate 54B. The packing 55 is made of a rubber-like elastic material and airtightly seals the gap between the capillary tubes 53 and the plate 54B. A clamping plate 56 is disposed to press and secure the packing 55. The packing 55 is compressed by the plate portion 54B and the sandwiching plate 56 and fixed to the main body portion 54A. The sandwiching plate 56 also has a through hole 56x. The sandwiching plate 56 is disposed on the stepped portion 54b of the main body portion 54A, and the plate portion 54B fixed to the main body portion 54A elastically presses the packing 55, thereby fixing it to the main body portion 54A. Furthermore, the main body portion 54A has a cylindrical portion 54c protruding from the rear surface. The cylindrical portion 54c has an inner shape that allows multiple capillary tubes 53 to be placed inside, and an outer shape that has a male thread 54d on the outside. The capillary tubes 53 of the main body portion 54A are placed inside this cylindrical portion 54c. A water supply valve socket 57 that supplies liquid is connected to the rear end of the cylindrical portion 54c.

[0052] The nozzle block 54 in FIG. 6 has a plurality of through holes 54x arranged in a ring shape in a plate portion 54B. The capillary tube 53 protrudes from the nozzle block 54, with its tip serving as a discharge protrusion 51 and its central hole serving as a fine spray hole 52. The number of capillary tubes 53 fixed to the nozzle block 54 determines the number of fine spray holes 52 in the spray unit 50. The spray unit 50 preferably has 10 or more fine spray holes 52, preferably 20 or more, and more preferably 30 or more fine spray holes 52, thereby increasing the amount of mist sprayed per unit time by one spray unit 50. Since the spray unit 50 has too many fine spray holes 52, the overall size becomes large, so the spray unit 50 is provided with 100 or fewer fine spray holes 52. 6, the capillary tubes 53 located in the center of the nozzle block 54 protrude to a greater extent than the capillary tubes 53 on the periphery, forming a centrally convex mountain-shaped tip surface formed by the large number of capillary tubes 53. However, the spray unit may also be configured such that the protruding lengths of the capillary tubes are the same and the tip surface formed by the large number of capillary tubes is flat.

[0053] The spray unit 50 described above has a thin tube consisting of numerous capillary tubes 53, each of which sprays liquid into a mist. Instead of capillary tubes, the spray unit can also use a perforated plate with numerous fine spray holes. The perforated plate is made of a conductive material such as metal. This perforated plate can be manufactured by drilling fine spray holes into a metal plate using a laser. Furthermore, the perforated plate can be made of sintered metal with fine spray holes. A conductive perforated plate can be connected to a high-voltage power supply to apply a high voltage between it and the atomizing electrode. However, the perforated plate does not necessarily have to be made of a conductive material. This is because the liquid is conductive, so applying a high voltage between the liquid sprayed from the spray holes and the atomizing electrode can atomize the sprayed mist through the action of static electricity. Therefore, the perforated plate can also be made of an open-cell plastic foam with fine spray holes.

[0054] The spray case 47 has the atomizing electrode 42 insulated from the sprayer 41. The atomizing electrode 42 is at a high voltage relative to the sprayer 41. Therefore, the atomizing electrode 42 and the sprayer 41 are insulated from each other and fixed to the spray case 47. In electrostatic atomizers in which the sprayer is fixed to a metal spray case without insulation, the atomizing electrode is insulated from the spray case. In electrostatic atomizers in which the sprayer is insulated from the spray case, the atomizing electrode is fixed to the spray case. However, both the sprayer and the atomizing electrode can also be fixed to the spray case in an insulated state.

[0055] The atomizing electrode 42 generates a discharge between itself and the discharge protrusion 51 of the sprayer 41, atomizing the mist sprayed from the sprayer 41 into fine particles. This atomizing electrode 42 is located forward of and away from the fine spray hole 52 in the spray direction of the mist. The atomizing electrode 42 in FIG. 5 is an annular metal ring 42A located on the outer periphery of the nozzle block 54, and is located on the outer periphery of multiple capillary tubes 53 fixed to the nozzle block 54. The atomizing electrode 42, which is a metal ring shown in FIG. 5, is located in the path of the carrier gas ejected from the ejection hole 64, and can reduce adhesion of mist to the atomizing electrode 42 due to the blown carrier gas.

[0056] Alternatively, a metal mesh can be used as the atomizing electrode. The metal mesh atomizing electrode is positioned away from the discharge protrusions 51 in the spray direction of the mist. The metal mesh atomizing electrode discharges uniformly with each discharge protrusion 51, atomizing the mist sprayed from each fine spray hole 52 into fine particles.

[0057] The atomizing electrode 42 is disposed in front of each spray unit 50. In the electrostatic atomizer 40 of FIG. 5, the atomizer 41 sprays mist downward, so the atomizing electrode 42 is disposed below the spray unit 50.

[0058] The high-voltage power supply 43 applies a high voltage between the spray unit 50 and the atomizing electrode 42. The high-voltage power supply 43 is a DC power supply, with the positive side connected to the atomizing electrode 42 and the negative side connected to the spray unit 50. However, it is also possible to connect the positive side to the spray unit and the negative side to the atomizing electrode.

[0059] The electrostatic atomizer 40 in FIG. 5 has a closed chamber provided on top of the spray case 47, which serves as an air chamber 62. To separate the air chamber 62, a partition wall 63 is fixed airtight to the top of the spray case 47. The partition wall 63 divides the interior of the spray case 47 into the air chamber 62 and the spray chamber 61, and also serves as a fixing part for fixing the sprayer 41, fixing multiple spray units 50 in place. The spray units 50 of the sprayer 41 are fixed to the partition wall 63, which serves as a fixing part, so as to spray mist into the spray chamber 61. The spray units 50 are detachably fixed to the partition wall 63 via connecting bolts 58 that pass through connecting holes 54e opened in the flange 54a of the nozzle block 54, as shown in FIG. 6.

[0060] The air chamber 62 has a closed structure and is connected to a blower 67, which is a gas supply mechanism. The carrier gas forcibly blown from the blower 67 is sprayed into the spray chamber 61 through outlet holes 64 provided through the partition wall 63. The outlet holes 64 are slit-shaped through-holes provided between the spray units 50 so that the sprayed carrier gas is sprayed around each spray unit 50. However, the outlet holes do not necessarily have to be slit-shaped. Multiple circular or polygonal through-holes can also be provided between the spray units to spray the carrier gas between the spray units. The carrier gas sprayed from the outlet holes 64 into the spray chamber 61 transports the atomized mist. The spray case 47 in FIG. 5 has outlet holes 64 provided between adjacent spray units 50. The carrier gas blown into the spray chamber 61 from the blowout hole 64 is mixed with the mist that has been sprayed from the spray unit 50 and turned into fine particles by the atomization electrode 42, and is supplied to the static mixer 2 as mist-containing air.

[0061] As shown in FIG. 5 , the sprayer 41 has the spray unit 50 fixed to the spray chamber 61 side of the partition wall 63, and sprays mist into the spray chamber 61. The sprayer 41 is connected to a pump 65 that supplies pressurized liquid. The pump 65 pressurizes the liquid 9 stored in a liquid tank 66 and supplies it to the spray unit 50. The pump 65 filters the liquid before supplying it to the sprayer 41. The filter removes foreign matter that may clog the sprayer 41. The pump 65 increases the discharge pressure, thereby increasing the flow rate of the liquid sprayed from the spray unit 50 and reducing the average particle size of the mist. However, the average particle size of the mist varies not only depending on the pressure of the liquid supplied from the pump 65 but also on the structure of the spray unit 50. For this reason, the pressure at which the pump 65 pressurizes the liquid and supplies it to the spray unit 50 is set to an optimum value taking into consideration the structure of the spray unit 50 and the required mist particle size, and is preferably 0.1 MPa or higher, preferably 0.2 MPa or higher, and more preferably 0.3 MPa or higher. If the pressure of the liquid supplied by the pump 65 to the spray unit 50 is high, the pump 65 will become expensive and the power consumption of the motor that operates the pump 65 will increase, resulting in higher running costs. Therefore, the pressure of the liquid supplied by the pump 65 to the spray unit 50 is set to, for example, 1 MPa or lower, preferably 0.8 MPa or lower, and more preferably 0.7 MPa or lower. The pressure at which the pump 65 pressurizes the liquid and supplies it to the spray unit 50 is preferably 0.3 MPa to 0.6 MPa. [Industrial Applicability]

[0062] The present invention is suitable for use as a method for dissolving water-soluble components contained in dissolved gases in a liquid, for example, in a method for dissolving odorous components, ammonia, alcohol, volatile organic compounds (VOCs), etc. in a liquid and recovering or removing them. [Explanation of symbols]

[0063] 100, 200…melting equipment 1…Atomizer 2...Static mixer 3...Collector 3A...Cyclone 4...Controller 5...Supply fan 6...Outdoor air fan 7...Cooler 9…Liquid 10...Atomization chamber 11...Ultrasonic vibrator 12...High frequency power supply 13...Supply port 14...Overflow port 15…Supply mechanism 16...Liquid tank 17...Liquid pump 18…Bottom plate 18A…Opening 19...Lead wire 20…Blower 21...Air heater 22…Liquid warmer 25...Pipe member 26...Element 26A...Right element 26B...Left element 27...Temperature sensor 28...Humidity sensor 31...Discharge pipe 40...Electrostatic atomizer 41…Sprayer 42...Atomization electrode 42A...Metal ring 43...High voltage power supply 47...Spray case 50...Spray unit 51…Discharge protrusion 52...Fine spray hole 53...Capillary tube 54...Nozzle block 54A...Main body 54B...Plate section 54a...Flange 54b...Step 54c...Cylinder part 54d...Male thread 54e…Connection hole 54x…Through hole 55...Gasket 56... Clamping plate 56x…Through hole 57...Water faucet socket 58...Connecting bolt 61...Spray chamber 62...Air chamber 63...Partition wall 64...Blowout hole 65...Pump 66...Seawater tank 67...Blower W...liquid level P…liquid column

Claims

1. A method for dissolving a water-soluble component of a dissolved gas in a liquid, comprising the steps of: The dissolved gas and mist-containing air are supplied to a static mixer, The static mixer mixes the dissolved gas with the mist-containing air, and adjusts the air flow rate of the mist-containing air to adjust the relative humidity inside the static mixer and maintain the liquid mist in a granular state. contacting the liquid mist with the dissolved gas to dissolve the water-soluble components of the dissolved gas in the liquid mist; A dissolving method characterized by agglomerating a liquid mist in which a water-soluble component is dissolved to obtain a solution in which the water-soluble component is dissolved.

2. The dissolution method according to claim 1, The liquid is ultrasonically vibrated to generate a liquid column, Forced air is blown into the generated liquid column to separate the mist from the liquid column and produce mist-containing air. A dissolving method characterized by supplying the dissolving gas and the mist-containing air to the static mixer.

3. The dissolution method according to claim 1, The liquid is sprayed from a sprayer; The sprayed mist is electrostatically atomized and mixed with conveying air to form the mist-containing air, A dissolving method characterized by supplying the dissolving gas and the mist-containing air to the static mixer.

4. The dissolution method according to any one of claims 1 to 3, Detecting the temperature or humidity inside the static mixer, A dissolving method characterized by adjusting the air flow rate of the mist-containing air.

5. The dissolution method according to any one of claims 1 to 4, the dissolved gases include air; The flow rate of the dissolved gas containing air supplied to the static mixer and the air flow rate of the mist-containing air are adjusted, A dissolving method characterized by maintaining the liquid mist in a granular form in the static mixer.

6. The dissolution method according to claim 5, Detecting the temperature inside the static mixer, A dissolving method comprising adjusting a flow rate of the dissolved gas containing air supplied to the static mixer.

7. The dissolution method according to any one of claims 1 to 6, The temperature in the static mixer and the air flow rate of the mist-containing air are adjusted. A dissolving method characterized by maintaining the liquid mist in a granular form in the static mixer.

8. The dissolution method according to claim 1 or 2, The amount of liquid mist supplied to the static mixer and the air flow rate of the mist-containing air are adjusted. A dissolving method characterized by maintaining the liquid mist in a granular form in the static mixer.

9. The dissolution method according to claim 8, Detecting the temperature within the static mixer; A dissolving method characterized by adjusting the amount of liquid mist supplied to the static mixer based on the detected temperature.

10. The dissolution method according to claim 1 or 2, By adjusting the temperature of the dissolved gas supplied to the static mixer and the air flow rate of the mist-containing air, A dissolving method characterized by maintaining the liquid mist in a granular form in the static mixer.

11. The dissolution method according to claim 10, Air is supplied to the dissolved gas, and the amount of air supplied to the dissolved gas is adjusted, A dissolution method, characterized by adjusting the temperature of the dissolution gas supplied to the static mixer.

12. The dissolution method according to any one of claims 1 to 11, The water-soluble component of the dissolved gas is A dissolving method characterized by containing any of odorous components, ammonia, alcohol, volatile organic compounds (VOCs), soot, NOx, and SOx.

13. The dissolution method according to any one of claims 1 to 12, A dissolving method characterized in that the liquid is water, alkaline water, or acidic water.

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