KR20240044394A - Mineral carbonation apparatus - Google Patents

Abstract

The mineral carbonation device according to the present invention includes a carbon dioxide tank (10) storing carbon dioxide; A bubble generator (20) that generates bubble water by injecting carbon dioxide supplied from the carbon dioxide tank (10) into stored water in the form of ultra-fine bubbles; A bubble storage device (100) that receives and stores the bubble water generated by the bubble generator (20); A reaction device (200) to which minerals or industrial by-products are supplied and which receives bubble water from the bubble storage device (100) to react with the minerals or industrial by-products; It includes a water supply device (70) that supplies water to at least one of the bubble generating device (20) or the bubble storage device (100), and sets the bubble water temperature of the bubble storage device to the reference temperature through a temperature control device. Since it is maintained below this level, there is an advantage in minimizing the evaporation of carbon dioxide.

Description

Mineral carbonation apparatus

The present invention relates to a mineral carbonation device that performs mineral carbonation using industrial by-products that are essentially generated during the production process of materials.

Industrial by-products generated from various industrial facilities have been difficult to apply technically, and as a result, industrial by-products are used only as simple landfill materials or simple fuel for roads, playgrounds, etc., and the rest is completely landfilled.

Due to the disposal of industrial by-products generated in large quantities, the shortage of landfill sites is becoming more serious, and problems such as environmental damage around the landfill sites are occurring.

Therefore, recycling methods that can prevent the expansion of reprocessing plants, economically reduce costs, and minimize environmental pollution by recycling industrial by-products that were rarely recycled and were landfilled are being sought.

Industrial by-products such as fly ash and slag generally contain various components, but as mentioned above, rather than using the components of industrial by-products, they are recycled only as simple materials or simple fuel, etc., so they cannot be used for purposes with high added value. It has been requested.

Accordingly, in order to compensate for the problem that the existing mineral carbonation technology, which carbonates by eluting alkaline ions from minerals, consumes a lot of energy and costs too much, it uses waste resources containing alkali ions rather than mineral resources to carbonate them. Interest in is increasing.

In addition, carbon dioxide is a representative greenhouse gas, and research to reduce carbon dioxide emissions is continuously conducted.

In particular, research is being actively conducted recently to utilize carbon dioxide as a resource through carbon dioxide conversion and reuse, rather than disposing of it in the ground or ocean.

For example, carbon dioxide mineralization conversion technology involves a chemical reaction that converts carbon dioxide by producing calcium carbonate or magnesium carbonate using minerals such as calcium or magnesium silicate.

Carbon dioxide mineral carbonation technology reacts carbon dioxide collected or emitted from industry with natural minerals containing alkali and alkaline earth metal components in the form of oxides and hydroxides or inorganic circulating resources (such as waste concrete) emitted from industry to produce calcium carbonate (CaCO3). It is a technology that stably immobilizes or stores carbon dioxide by making it with carbonate minerals such as magnesite (MgCO3).

Because this reaction is spontaneous, mineral carbonation has a permanent carbon dioxide storage effect. Another advantage of mineral carbonation is that industrial by-products can be recycled. Instead of natural minerals such as wollastonite, industrial by-products with a high proportion of mineral ions, such as steelmaking slag and blast furnace slag, can be used as a source of mineral ions. Since calcium oxide has the largest proportion in these industrial by-products, calcium carbonate is used more than other carbonate minerals. Creation is the most productive.

Selective formation of calcium carbonate polymorphs is proposed as a method to further increase the added value of calcium carbonate production using industrial by-products. The forms of calcium carbonate anhydride crystals are largely divided into three types: calcite, vaterite, and aragonite.

Each of these polymorphs has a different crystal structure and, as a result, shows different shapes and physical and chemical properties. Among the calcium carbonate polymorphs, calcite is the most thermodynamically stable form under everyday conditions and is therefore considered an industrially important inorganic mineral.

However, aragonite and vaterite, which are thermodynamically less stable, are also stable from a kinetic and biochemical perspective under routine synthesis conditions, so they are used industrially depending on their shape and properties. The formation of calcium carbonate anhydride crystal polymorph is highly dependent on synthesis variables such as temperature, pressure, pH, reaction time, concentration and ratio of ions, mixing speed, type and amount of additives, and addition order.

In order to selectively produce calcium carbonate polymorphs, constant control of synthesis variables is required, and in this respect, a continuous reactor has an advantage over a batch reactor.

Meanwhile, the reaction to produce calcium carbonate occurs in a liquid phase, whereas carbon dioxide exists in a gaseous state under everyday conditions, so dissolution of carbon dioxide is essential for the calcium carbonate production reaction using carbon dioxide to occur.

However, the dissolution of carbon dioxide is limited, and carbon dioxide supplied in excess of the solubility forms bubbles and generates interfacial resistance between gas and liquid, so there are restrictions on the efficient use of carbon dioxide gas in a continuous reactor.

Republic of Korea Patent Publication No. 10-2017-0133938 Republic of Korea Patent No. 10-1777142 Republic of Korea Patent No. 10-1945826 Republic of Korea Patent Publication No. 10-2020-0072259

The purpose of the present invention is to provide a carbonation device that carbonates minerals or industrial by-products using ultrafine bubbles.

The present invention includes a carbon dioxide tank (10) storing carbon dioxide; A bubble generator (20) that generates bubble water by injecting carbon dioxide supplied from the carbon dioxide tank (10) into stored water in the form of ultra-fine bubbles; A bubble storage device (100) that receives and stores the bubble water generated by the bubble generator (20); A reaction device (200) to which minerals or industrial by-products are supplied and which receives bubble water from the bubble storage device (100) to react with the minerals or industrial by-products; A mineral carbonation device including a water supply device (70) that supplies water to at least one of the bubble generating device (20) or the bubble storage device (100).

The water supply device 70 includes a first water supply pipe 71 that supplies water to the bubble storage device 100; a second water supply pipe (72) supplying water to the bubble generating device (20); A first water supply valve (73) that opens and closes the first water supply pipe (71); It includes a second water supply valve 74 that opens and closes the second water supply pipe 72, and the second water supply pipe 72 is branched from the first water supply pipe 71 to form the bubble generating device 20. ) can be connected to.

A first pipe 31 connecting the carbon dioxide tank 10 and the bubble generator 20 is connected to the bubble generator 20 and the bubble storage device 100, and the bubble generator 20 is connected to the first pipe 31 connecting the carbon dioxide tank 10 and the bubble generator 20. A second pipe 32 that supplies bubble water to the bubble storage device 100 is connected to the bubble generating device 20 and the bubble storage device 100, and the water or bubbles of the bubble storage device 100 are connected. A third pipe 33 that supplies water to the bubble generating device 20, the bubble storage device 100, and the carbon dioxide tank 10 are connected, and the carbon dioxide of the bubble storage device 100 is recovered. 4 A first control disposed in the pipe 34 and the first pipe 31 and controlling at least one of the flow rate or mass of carbon dioxide supplied from the carbon dioxide tank 10 to the bubble generator 20. A gas recovery device disposed in the valve 40 and the fourth pipe 34 and recovering carbon dioxide from the bubble storage device 100 to the carbon dioxide tank 10 according to the carbon dioxide concentration of the bubble storage device 100. A fifth pipe 35 connects the device 60, the bubble storage device 100 and the reaction device 200, and supplies bubble water from the bubble storage device 100 to the reaction device 200. , It may further include a second control valve 50 disposed in the fifth pipe 35 and controlling at least one of the flow rate or mass of the bubble water passing through the fifth pipe 35.

The first control valve 40 and the second control valve 50 may be metering valves that discharge a constant amount regardless of pressure.

Carbon dioxide flows through the first pipe 31.

Bubble water flows through the second pipe 32 and the third pipe 33.

Carbon dioxide flows through the fourth pipe 34.

A second on/off valve 37 and a second check valve (not shown) may be further disposed in the second pipe 32, and through this, the flow direction of the bubble water can be changed to the bubble generator 20. It can be forced to the storage device 100.

A third on/off valve 38 and a third check valve (not shown) may be further disposed in the third pipe 33, and through this, the flow direction of the bubble water can be changed from the bubble storage device 100 to the bubble water. It can be forced by the generator 20.

Since the internal pressure of the bubble generating device 20 is higher than the internal pressure of the bubble storage device 100, bubble water or water is added to the third pipe 33 or the bubble storage device 100 to generate the bubbles. A return compressor 39 that forces flow to the device 20 may be further disposed.

The bubble storage device 100 includes a storage housing 110 with a storage space 105 formed therein; A temperature control device 300 that controls the temperature of the bubble water stored in the storage housing 110; A water level detection device 130 disposed in the storage housing 110 and detecting the water level of bubble water stored in the storage housing 110; A first sensing device 140 that detects the dissolved carbon dioxide concentration of the bubble water stored in the storage housing 110; It may include a second sensing device 150 that detects the carbon dioxide concentration of the storage housing 110.

The water level sensing device 130 includes a first water level sensor 131 that detects the lowest water level, and a second water level sensor 132 that detects the highest water level. The first water level sensor 131 is placed lower than the second water level sensor 132.

At least one of the second on/off valve 37, the third on/off valve 38, or the first water supply valve 73 may be operated according to the water level detection value of the water level detection device 130.

For example, when the water level detection value exceeds the maximum water level (detected by the second water level sensor), the second on/off valve 37 and the first water supply valve 73 are closed to supply additional water and bubble water. Block.

When the water level detection value is less than the minimum water level (detected by the first water level sensor), the third on/off valve 38 is closed, and at least one of the second on/off valve 37 or the first water supply valve 73 is closed. Open to raise the water level.

The first detection device 140 monitors the dissolved carbon dioxide concentration of the bubble water stored in the storage housing 110, and the second on/off valve 37 and the third on/off valve 38 are activated according to the detected dissolved carbon dioxide concentration value. ) or the first water supply valve 73.

The first sensing device 140 further includes a first sensing unit 145 that detects the dissolved carbon dioxide concentration, and the first sensing unit 145 is disposed below the water surface 1.

The water level is adjusted so that the first sensing unit 145 is located below the water surface 1 through the water level sensing device 130.

If the dissolved carbon dioxide concentration value of the bubble water exceeds the maximum standard value, the first water supply valve 73 may be opened to supply additional water.

The second sensing device 150 further includes a second sensing unit 155 that detects the concentration of carbon dioxide in the gaseous state. The second sensing unit 155 is disposed above the water surface (1).

The water level is adjusted so that the second sensing unit 155 is located above the water surface 1 through the water level detection device 130. The second sensing unit 155 is disposed above the second water level sensor 132.

If the dissolved carbon dioxide concentration value of the bubble water is less than the minimum standard value, the first water supply valve 73 is closed to block additional water supply, and the second open/close valve 37 is opened to additionally supply bubble water. .

The reaction device 200 includes a reaction housing 210 with a reaction space 201 formed therein, and is disposed inside the reaction housing 210, and produces carbonate by stirring stored minerals or industrial by-products with bubble water. A stirring device 220 that is disposed in the reaction housing 210 and a stirring motor 230 that drives the stirring device 220, and detects the dissolved carbon dioxide concentration of carbonate stored in the reaction housing 210. a third sensing device 240 that monitors the change in acidity of the carbonate stored in the reaction housing 210, and a fourth sensing device 250 that monitors the ion change of the carbonate stored in the reaction housing 210. It includes a fifth sensing device 260.

The third sensing device 240 detects the dissolved carbon dioxide concentration of the carbonate.

The fourth detection device 250 is a device for monitoring the pH concentration of the carbonate and can detect chemical changes in the carbonate.

The fifth detection device 260 is a device for monitoring ion changes in the carbonate, and is capable of detecting chemical changes in alkali metal ions and alkaline earth metal ions such as K ⁺ , Na ⁺ , Ca ^{2 +} , and Mg ^{2 +} You can.

The temperature control device 300 includes a compressor 310 that compresses the refrigerant, a condensation assembly 400 that condenses the refrigerant compressed in the compressor 310, and an expansion of the refrigerant condensed in the condensation assembly 400. It includes an expansion valve 340 that evaporates the expanded refrigerant and an evaporation heat exchanger 330 that evaporates the expanded refrigerant.

The temperature control device 300 includes a first refrigerant pipe 351 connecting the compressor 310 and the condensation assembly 400, and a second refrigerant pipe connecting the condensation assembly 400 and the expansion valve 340. A third refrigerant pipe 353 connecting the pipe 352, the expansion valve 340 and the evaporation heat exchanger 330, and a fourth refrigerant pipe 354 connecting the evaporation heat exchanger 330 and the compressor 310. ) includes.

The evaporation heat exchanger 330 is disposed in the middle of the height of the storage housing 110, and the evaporation heat exchanger 330 is disposed below the first water level sensor 131, through which the evaporation heat exchanger 330 generates bubbles. It has the characteristic of remaining submerged in water.

The condensation assembly 400 includes a condensation housing 410 disposed inside the reaction housing 210 and having a condensation space 415 formed therein, and disposed inside the condensation housing 410, and the compressor 310. ) and a condensation heat exchanger 420 connected to the expansion valve 340 to circulate the refrigerant, disposed on one inner side of the condensation housing 410, and supplying bubble water from the upper side to one side of the condensation housing 410. A first condensation guide 430 that guides to the side, and a second condensation guide disposed on the other inner side of the condensation housing 410 and guiding the bubble water supplied from the top to the other side of the condensation housing 410. Includes (440).

The condensation heat exchanger 420 includes a plurality of condensation cooling fins 424 arranged to be spaced apart in the horizontal direction, and a condensation pipe 423 arranged to penetrate the condensation cooling fins 424 in the vertical direction.

The condensation housing 410 has a first housing side wall 416 disposed to face one side 421 of the condensation heat exchanger 420, and a first housing side wall 416 disposed to face the other side 422 of the condensation heat exchanger 420. It includes a second housing side wall 417.

The condensation upper wall 413 is coupled to the second housing side wall 417 and disposed to be inclined downward in the direction of the first housing side wall 416, and the condensation lower wall 414 is connected to the first housing side wall 416. ) and is disposed to be inclined downward in the direction of the second housing side wall 417.

The first condensation guide 430 and the second condensation guide 440 are disposed inclined toward the condensation heat exchanger 420.

The first condensation guide 430 has a first end 431 in close contact with the first housing side wall 416, and a first other end 432 in close contact with one side 421 of the condensation heat exchanger 420. .

The first end 431 is placed high, and the first other end 432 is placed lower than the first end 431 to form a first guide inclination angle A.

The first condensation guide 430 can guide bubble water from one side to the other through the first guide inclination angle (A), and through this, the bubble water can easily flow into one side of the pin gap. .

A plurality of first condensation guides 430 are arranged to be spaced apart in the above direction, and the gap between the first condensation guides 430 is defined as the first guide gap G1.

The second condensation guide 440 has a second end 442 in close contact with the second housing side wall 417 and a second end 441 in close contact with the other side 422 of the condensation heat exchanger 420. do.

The second other end 442 is placed high, and the second end 441 is placed lower than the second other end 442 to form a second guide inclination angle B.

The first condensation guide 430 and the second condensation guide 440 form an included angle of 90 degrees or more and less than 180 degrees.

Through the second guide inclination angle (B), the second condensation guide 440 can guide bubble water from the other side to one direction, and through this, the bubble water can easily flow into the other side of the pin gap. .

A plurality of second condensation guides 440 are arranged to be spaced apart in the above direction, and the gap between the second condensation guides 440 is defined as the second guide gap G2.

The first guide gap (G1) and the second guide gap (G2) are formed to be the same.

When viewed up and down, the first condensation guide 430 and the second condensation guide 440 are arranged in a staggered zigzag shape.

The heights of each first other end 432 of the plurality of first condensation guides 430 and each first end 441 of the plurality of second condensation guides 440, which are in close contact with the condensation heat exchanger 420, are different. It is placed.

The first other end 432 of the first condensation guide 430 and the first end 441 of the second condensation guide 440 are formed to have a length of 1/2 of the first guide gap G1.

A first guide drain groove disposed on the first other end 432 of the first condensation guide 430 and penetrating the first condensation guide 430 in the vertical direction, and a first guide drain groove of the second condensation guide 440 2 It is disposed at one end 441 and may further include a second guide drain groove penetrating the second condensation guide 440 in the vertical direction.

The first guide drain groove is formed concavely in the direction from the first other end 432 to the first end 431, and the second guide drain groove is formed from the second end 441 to the second other end 442. It is formed concavely in one direction.

When viewed from the top, the first guide drain groove and the second guide drain groove are formed in a square shape.

Through the first guide drain groove and the second guide drain groove, a portion of the bubble water can be drained to the lower side rather than the pin gap, and through this, the first condensation guide 430 and the second condensation guide 440 It has the feature of allowing bubble water to flow even with pin spacing on the lower side that is not directly connected.

A plurality of first guide drain grooves are arranged in the longitudinal direction of the first condensation guide 430.

The first guide drainage groove includes a 1-1 guide groove 433 disposed at the front, a 1-3 guide groove 435 disposed at the rear, the 1-1 guide groove 433, and the first guide groove 433. -3 It includes a 1-2 guide groove (434) disposed between the guide grooves (435).

The 1-1 guide groove 433, 1-2 guide groove 434, and 1-3 guide groove 435 are formed at equal intervals, and this is defined as groove spacing (R).

A plurality of second guide drain grooves are arranged in the longitudinal direction of the second condensation guide 440.

The second guide drain groove includes a 2-1 guide groove 443 disposed at the front and a 2-2 guide groove 444 disposed at the rear.

The 2-1 guide groove 443 and the 2-2 guide groove 444 are spaced apart in the front and rear directions to form a groove spacing (R).

When viewed from the top, the 2-1 guide groove 443 is disposed between the 1-1 guide groove 433 and the 1-2 guide groove 434, and the 1-2 guide groove 434 ) and the 2-2 guide groove 444 is disposed between the 1-3 guide groove 435.

The 2-1 guide groove 443 and the 2-2 guide groove 444 are spaced apart in the front and rear directions to form a groove spacing (R).

When viewed from the top, the 2-1 guide groove 443 is disposed between the 1-1 guide groove 433 and the 1-2 guide groove 434, and the 1-2 guide groove 434 ) and the 2-2 guide groove 444 is disposed between the 1-3 guide groove 435.

Bubble water discharged downward through the 1-1 guide groove 433, 1-2 guide groove 434, and 1-3 guide groove 435 passes through one side of the condensation heat exchanger 420. Bubble water can flow in through one side of the fin gap, and the bubble water discharged downward through the 2-1 guide groove 443 and the 2-2 guide groove 444 flows through the other side of the condensation heat exchanger 420. It may flow into the other side of the pin gap.

Through the arrangement and structure of the first condensation guide 430 and the second condensation guide 440, the bubble water flowing into the condensation space 415 through the housing entrance 411 is moved downward by its own weight, It flows downward in a zigzag shape while penetrating the condensation heat exchanger 420 in the left and right directions, and then can be discharged into the reaction space 201 through the housing outlet 412.

The control method of the mineral carbonation device according to the present invention includes the steps of detecting the temperature of bubble water stored in the bubble storage device 100 and determining whether the temperature of the bubble water exceeds the reference temperature (S10). If satisfied, a step (S20) of driving the compressor 310 of the temperature control device 300, and after step S20, the water level of the bubble storage device 100 is detected, and the detected water level is the lowest water level. A step (S30) of determining whether the amount is less than 10%, and if the step S30 is satisfied, water is supplied to the bubble storage device 100 through the water supply device 70, and the bubble water of the bubble generator 20 is supplied to the bubble storage device 100. Step (S40) of supplying to the bubble storage device 100, and after step S40, detecting the water level of the bubble storage device again and determining whether the detected water level is located between the lowest water level and the highest water level. In step S50, if the step S50 is satisfied, the water supply through the water supply device 70 is stopped, and only bubble water is supplied to the bubble storage device 100 through the bubble generator 20. A step (S60) of detecting the water level of the bubble storage device again after the step S60 and determining whether the detected water level exceeds the highest water level (S70), and if the step S70 is satisfied , a step (S80) of circulating the bubble water of the bubble storage device 100 with the bubble generator 20 by changing the third on/off valve 38 of the bubble generator 20 to the open state; After step S80, detecting the temperature of the bubble water of the bubble storage device 100 again, determining whether the detected temperature of the bubble water is between the minimum temperature and the reference temperature (S90), and satisfying the step S90 If not, a step (S100) of stopping the compressor 310 is included.

First, the present invention has the advantage of minimizing the evaporation of carbon dioxide because the temperature of the bubble water in the bubble storage device is maintained below the standard temperature through a temperature control device.

Second, the present invention has the advantage of promoting the mineral carbonation reaction because it supplies temperature-controlled bubble water to the reaction device.

Third, the present invention has the advantage of providing heated bubble water and promoting the mineral carbonation reaction because bubble water is heat-exchanged with a condensation heat exchanger and then mixed with industrial by-products.

Fourth, the present invention has the advantage of improving the cooling cycle efficiency of the refrigerant because it can cool the condensation heat exchanger through the temperature of the bubble water.

Fifth, the present invention has the advantage that the condensation guide of the condensation assembly can increase the movement path of bubble water, thereby securing sufficient heat exchange time with the condensation heat exchanger.

1 is a configuration diagram of a mineral carbonation device according to a first embodiment of the present invention.
Figure 2 is a configuration diagram of the temperature control device shown in Figure 1.
Figure 3 is a front cross-sectional view of the condensation assembly shown in Figure 2.
Figure 4 is a partial perspective view of the condensation assembly shown in Figure 3.
Figure 5 is a plan cross-sectional view of the condensation assembly shown in Figure 3.
Figure 6 is a flowchart showing a control method of a mineral carbonation device according to the first embodiment of the present invention.
Figure 7 is a diagram to explain the concept of mineral carbonation.
Figure 8 is a diagram showing the performance index items of the results when mineral carbonation is performed using a mineral carbonation device according to an embodiment.
Figure 9 is a diagram showing the evaluation method and evaluation environment of the performance index items according to Figure 8.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components.

Terms such as first, second, A, B, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention. The term “and/or” includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

In this document, “configured to” means “suitable for,” “having the ability to,” or “changed to,” depending on the situation, for example, in terms of hardware or software. ," can be used interchangeably with "made to," "capable of," or "designed to." In some contexts, the expression “a device configured to” may mean that the device is “capable of” working with other devices or components.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. In order to facilitate overall understanding when describing the present invention, the same reference numerals are used for the same components in the drawings, and duplicate descriptions for the same components are omitted.

Figure 1 is a configuration diagram of a mineral carbonation device according to a first embodiment of the present invention, Figure 2 is a configuration diagram of the temperature control device shown in Figure 1, and Figure 3 is a front cross-sectional view of the condensation assembly shown in Figure 2. , FIG. 4 is a partial perspective view of the condensation assembly shown in FIG. 3, and FIG. 5 is a plan cross-sectional view of the condensation assembly shown in FIG. 3.

The mineral carbonation device according to this embodiment includes a carbon dioxide tank (10) storing carbon dioxide, a bubble generator (20) that generates ultra-fine bubbles through carbon dioxide supplied from the carbon dioxide tank (10), and the bubble generator. A bubble storage device (100) that receives carbon dioxide in the form of ultra-fine bubbles generated in (20) and stores it in water, minerals or industrial by-products are supplied, and water containing ultra-fine bubbles is supplied from the bubble storage device (100). It includes a reaction device 200 that receives the supply and reacts it with the mineral or industrial by-product, and a water supply device 70 that supplies water to at least one of the bubble generator 20 or the bubble storage device 100. .

High-pressure carbon dioxide is stored in the carbon dioxide tank 10.

The bubble generator 20 sprays carbon dioxide supplied from the carbon dioxide tank 10 into water in the form of ultra-fine bubbles. The bubble generating device 20 can receive water from the bubble storage device 100.

In this example, the average size of the ultrafine bubbles is 300 nm or less, and more than 300 million ultrafine bubbles are included per 1cc. In this embodiment, the bubble generating device 20 has a discharge volume of more than 1 ton per hour. The discharge amount of the bubble generating device 20 may include water and carbon dioxide.

In this embodiment, water containing ultrafine bubbles is defined as bubble water.

In this embodiment, the water supply device 70 supplies water to the bubble generating device 20 and the bubble storage device 100, respectively. The water supply device 70 includes a first water supply pipe 71 that supplies water to the bubble storage device 100, and a second water supply pipe 72 that supplies water to the bubble generating device 20, It includes a first water supply valve 73 that opens and closes the first water supply pipe 71, and a second water supply valve 74 that opens and closes the second water supply pipe 72.

In this embodiment, the second water supply pipe 72 is branched from the first water supply pipe 71 and connected to the bubble generating device 20.

The mineral carbonation device according to this embodiment has the feature of maintaining the number of ultra-fine bubbles in the bubble water by recovering the bubble water in the bubble storage device 100 with the bubble generator 20 and additionally supplying ultra-fine bubbles. there is.

The mineral carbonation device connects a first pipe 31 connecting the carbon dioxide tank 10 and the bubble generating device 20, the bubble generating device 20 and the bubble storage device 100, and The second pipe 32, which supplies the bubble water of the generator 20 to the bubble storage device 100, is connected to the bubble generator 20 and the bubble storage device 100, and the bubble storage device ( A third pipe (33) that supplies water or bubble water (100) to the bubble generating device (20) is connected to the bubble storage device (100) and the carbon dioxide tank (10), and the bubble storage device (100) is connected. At least one of the fourth pipe 34 for recovering carbon dioxide and the flow rate or mass of carbon dioxide disposed in the first pipe 31 and supplied from the carbon dioxide tank 10 to the bubble generator 20 It is disposed in the first control valve 40, which controls the fourth pipe 34, and transfers carbon dioxide from the bubble storage device 100 to the carbon dioxide tank 10 according to the carbon dioxide concentration of the bubble storage device 100. ), connecting the gas recovery device 60, the bubble storage device 100, and the reaction device 200, and supplying the bubble water of the bubble storage device 100 to the reaction device 200. It includes a fifth pipe 35 and a second control valve 50 disposed in the fifth pipe 35 and controlling at least one of the flow rate or mass of bubble water passing through the fifth pipe 35. do.

The first control valve 40 and the second control valve 50 may be metering valves that discharge a constant amount regardless of pressure.

Carbon dioxide flows through the first pipe 31.

Bubble water flows through the second pipe 32 and the third pipe 33.

Carbon dioxide flows through the fourth pipe 34.

A second on/off valve 37 and a second check valve (not shown) may be further disposed in the second pipe 32, and through this, the flow direction of the bubble water can be changed to the bubble generator 20. It can be forced to the storage device 100.

A third on/off valve 38 and a third check valve (not shown) may be further disposed in the third pipe 33, and through this, the flow direction of the bubble water can be changed from the bubble storage device 100 to the bubble water. It can be forced by the generator 20.

Since water or air must move in one direction, a check valve (not shown) may be placed in each pipe, and since this is a common technique for those skilled in the art, detailed description will be omitted.

Since the internal pressure of the bubble generating device 20 is higher than the internal pressure of the bubble storage device 100, bubble water or water is added to the third pipe 33 or the bubble storage device 100 to generate the bubbles. A return compressor 39 that forces flow to the device 20 is further disposed.

A storage filter 36 may be further disposed on the inlet side of the third pipe 33, and may filter foreign substances in the bubble water flowing from the bubble storage device 100 to the third pipe 33. there is.

In this embodiment, the return compressor 39 is disposed inside the bubble storage device 100, and pressurizes and discharges the bubble water of the bubble storage device 100 to the storage filtration filter 36.

By simultaneously controlling the third on/off valve 38 and the second water supply valve 74, the amount of bubble water and the amount of water recovered through the third pipe 33 can be controlled, and through this, the bubble generating device It is possible to prevent the concentration of ultrafine bubbles in (20) from rapidly decreasing.

The gas recovery device 60 absorbs carbon dioxide from the upper space 102 of the water surface 101 of the bubble storage device 100, pressurizes it, and transfers it to the carbon dioxide tank 10.

The gas recovery device 60 may be an air compressor. The gas recovery device 60 is automatically operated according to the carbon dioxide concentration value detected by the second detection device 150, which will be described later.

The bubble storage device 100 includes a storage housing 110, a temperature control device 300 that controls the temperature of the bubble water stored in the storage housing 110, and is disposed in the storage housing 110, A water level detection device 130 for detecting the water level of the bubble water stored in the storage housing 110, a first detection device 140 for detecting the dissolved carbon dioxide concentration of the bubble water stored in the storage housing 110, and the storage It includes a second sensing device 150 that detects the carbon dioxide concentration of the housing 110.

The first water supply pipe 71 is connected to the top of the storage housing 110 and may fall to the water surface 101.

Bubble water is stored inside the storage housing 110, and the water level detection device 130 detects the water level of the bubble water.

The water level detection device 130 may be a floating sensor.

The water level sensing device 130 includes a first water level sensor 131 that detects the lowest water level, and a second water level sensor 132 that detects the highest water level. The first water level sensor 131 is placed lower than the second water level sensor 132.

At least one of the second on/off valve 37, the third on/off valve 38, or the first water supply valve 73 may be operated according to the water level detection value of the water level detection device 130.

For example, when the water level detection value exceeds the maximum water level (detected by the second water level sensor), the second on/off valve 37 and the first water supply valve 73 are closed to supply additional water and bubble water. Block.

When the water level detection value is less than the minimum water level (detected by the first water level sensor), the third on/off valve 38 is closed, and at least one of the second on/off valve 37 or the first water supply valve 73 is closed. Open to raise the water level.

The first detection device 140 monitors the dissolved carbon dioxide concentration of the bubble water stored in the storage housing 110, and the second on/off valve 37 and the third on/off valve 38 are activated according to the detected dissolved carbon dioxide concentration value. ) or the first water supply valve 73.

The first sensing device 140 further includes a first sensing unit 145 that detects the dissolved carbon dioxide concentration, and the first sensing unit 145 is disposed below the water surface 1.

The water level is adjusted so that the first sensing unit 145 is located below the water surface 1 through the water level sensing device 130. In this embodiment, the first sensing unit 145 is placed lower than the first water level sensor 131.

If the dissolved carbon dioxide concentration value of the bubble water is less than the minimum standard value, the first water supply valve 73 is closed to block additional water supply, and the second open/close valve 37 is opened to additionally supply bubble water. .

If the dissolved carbon dioxide concentration value of the bubble water exceeds the maximum standard value, the first water supply valve 73 may be opened to supply additional water.

The second sensing device 150 monitors the carbon dioxide concentration in the space 102 above the water surface of the storage housing 110.

The second sensing device 150 further includes a second sensing unit 155 that detects the concentration of carbon dioxide in the gaseous state. The second sensing unit 155 is disposed above the water surface (1).

The water level is adjusted so that the second sensing unit 155 is located above the water surface 1 through the water level detection device 130. In this embodiment, the second sensing unit 155 is disposed above the second water level sensor 132.

Therefore, based on height, the water level sensing device 130 is disposed between the first sensing unit 145 and the second sensing unit 155.

When the temperature inside the storage housing 110 increases or the pressure decreases, carbon dioxide is vaporized and released from the stored bubble water, increasing the carbon dioxide concentration in the upper space 102.

When the carbon dioxide concentration in the upper space 102 exceeds the standard pressure value, the gas recovery device 60 can be operated to recover the carbon dioxide in the upper space 102.

The reaction device 200 includes a reaction housing 210 with a reaction space 201 formed therein, and is disposed inside the reaction housing 210, and produces carbonate by stirring stored minerals or industrial by-products with bubble water. A stirring device 220 that is disposed in the reaction housing 210 and a stirring motor 230 that drives the stirring device 220, and detects the dissolved carbon dioxide concentration of carbonate stored in the reaction housing 210. a third sensing device 240 that monitors the change in acidity of the carbonate stored in the reaction housing 210, and a fourth sensing device 250 that monitors the ion change of the carbonate stored in the reaction housing 210. It includes a fifth sensing device 260.

The mineral carbonation device may further include a conveyor device 290 for transporting the carbonated aggregate in which the mineral carbonation reaction has been completed in the reaction housing 210.

The reaction device 200 includes a reaction discharge pipe 211 disposed below the reaction housing 210 and discharging carbonated aggregate to the conveyor device 290, and an aggregate discharge pipe 211 disposed in the reaction discharge pipe 211. It may further include a valve 212.

An inlet 215 through which minerals or industrial by-products are input is disposed on the upper side of the reaction housing 210. In this embodiment, industrial by-products may be continuously introduced through the inlet 215.

The mixture of the industrial by-product and bubble water is defined as carbonate.

Through a chemical reaction between the industrial by-products and bubble water, carbonated aggregate combined with carbon dioxide is produced.

The stirring device 220 mixes the carbonates and promotes the elution of K ⁺ , Na ⁺ , Ca ²⁺ , and Mg ²⁺ from the carbonates to promote a mineral carbonation environment.

The stirring device 220 includes a stirring shaft 225 arranged in the vertical direction, a spiral blade 222 disposed in a spiral shape on the outer peripheral surface of the stirring shaft 225, and disposed in the longitudinal direction of the stirring shaft 225. ) includes.

The stirring motor 230 is disposed on the upper side of the reaction housing 210, and the stirring shaft 225 is coupled to the stirring motor 230.

The stirring device 220 is rotated by the operation of the stirring motor 230, and the carbonate stored in the reaction housing 210 flows upward by the rotational force of the stirring device 220.

Here, when the carbonate is continuously pushed upward by the rotation of the stirring device 220, the carbonate moved to the top flows radially outward based on the stirring shaft 225 and then flows into the reaction housing. It flows in a downward direction along the inner surface of 210, and then flows again to the lower end of the stirring shaft 225.

In order to easily implement the above-described flow of carbonate, the lower side of the reaction housing 210 is formed in the shape of a hopper that is pointed downward, and the stirring shaft 225 is disposed in the vertical direction at the center of the plane of the hopper shape. .

When the stirring device 220 is rotated in this way, the carbonate can be circulated while flowing in an upward and downward direction inside the reaction housing 210, thereby promoting the mineral carbonation process.

The third sensing device 240 detects the dissolved carbon dioxide concentration of the carbonate.

The fourth detection device 250 is a device for monitoring the pH concentration of the carbonate and can detect chemical changes in the carbonate.

The fifth detection device 260 is a device for monitoring ion changes in the carbonate, and is capable of detecting chemical changes in alkali metal ions and alkaline earth metal ions such as K ⁺ , Na ⁺ , Ca ²⁺ , and Mg ²⁺ You can.

The temperature control device 300 includes a compressor 310 that compresses the refrigerant, a condensation assembly 400 that condenses the refrigerant compressed in the compressor 310, and an expansion of the refrigerant condensed in the condensation assembly 400. It includes an expansion valve 340 that evaporates the expanded refrigerant and an evaporation heat exchanger 330 that evaporates the expanded refrigerant.

The temperature control device 300 includes a first refrigerant pipe 351 connecting the compressor 310 and the condensation assembly 400, and a second refrigerant pipe connecting the condensation assembly 400 and the expansion valve 340. A third refrigerant pipe 353 connecting the pipe 352, the expansion valve 340 and the evaporation heat exchanger 330, and a fourth refrigerant pipe 354 connecting the evaporation heat exchanger 330 and the compressor 310. ) includes.

The compressor 310 is disposed outside the storage housing 110.

In this embodiment, the condensation assembly 400 is disposed inside the reaction housing 210 to provide condensation heat generated during the condensation process of the refrigerant to the carbonate.

The heat of condensation not only heats the carbonate to promote chemical changes, but also improves the condensation efficiency of the refrigerant through the temperature of the carbonate.

In this embodiment, the evaporation heat exchanger 330 is disposed inside the storage housing 110, and provides evaporation heat generated during the evaporation process of the refrigerant to the bubble water.

The evaporative heat exchanger 330 is preferably disposed to be submerged in the bubble water.

In this embodiment, the evaporation heat exchanger 330 is disposed in the middle of the height of the storage housing 110, and the evaporation heat exchanger 330 is disposed below the first water level sensor 131, through which the evaporation heat exchanger ( 330) has the characteristic of remaining submerged in bubble water.

The evaporation heat exchanger 330 directly exchanges heat with bubble water, and can cool the bubble water through the heat of evaporation.

Since the temperature of the bubble water can be maintained low through the heat of evaporation, the concentration of dissolved carbon dioxide can be maintained high and evaporation of carbon dioxide in the bubble water can be suppressed.

Here, since the evaporative heat exchanger 330 is disposed in the middle of the height of the storage housing 110, the bubble water convection upward due to the temperature rise can be effectively cooled.

In particular, when controlling the water surface 101 of the bubble water to be located near the first water level sensor 131 through the water level detection device 130, the water surface 101 is effectively cooled to vaporize dissolved carbon dioxide. There are characteristics that can suppress this.

The condensation assembly 400 includes a condensation heat exchanger 420, and the condensation heat exchanger 420 is connected to the compressor 310 to circulate the refrigerant.

In this embodiment, the condensation assembly 400 is disposed inside the reaction housing 210, and bubble water discharged from the fifth pipe 35 falls into the condensation assembly 400.

The bubble water that falls into the condensation assembly 400 comes into contact with the condensation heat exchanger 420, is heated by the heat of condensation of the refrigerant, and then mixes with the industrial by-products.

The condensation assembly 400 includes a condensation housing 410 disposed inside the reaction housing 210 and having a condensation space 415 formed therein, and disposed inside the condensation housing 410, and the compressor 310. ) and a condensation heat exchanger 420 connected to the expansion valve 340 to circulate the refrigerant, disposed on one inner side of the condensation housing 410, and supplying bubble water from the upper side to one side of the condensation housing 410. A first condensation guide 430 that guides to the side, and a second condensation guide disposed on the other inner side of the condensation housing 410 and guiding the bubble water supplied from the top to the other side of the condensation housing 410. Includes (440).

The condensation heat exchanger 420 includes a plurality of condensation cooling fins 424 arranged to be spaced apart in the horizontal direction, and a condensation pipe 422 arranged to penetrate the condensation cooling fins 424 in the vertical direction.

The space between the condensation cooling fins 424 is defined as the fin spacing.

The first condensation guide 430 and the second condensation guide 440 can guide bubble water through the fin spacing, and heat exchange occurs as the bubble water flows through the fin spacing.

The condensation housing 410 has a housing inlet 411 formed on the upper side and a housing outlet 412 formed on the lower side. The housing inlet 411 opens toward the top, and the housing outlet 412 opens toward the side.

When viewed from the top, the first condensation guide 430 is exposed through the housing inlet 411, and bubble water discharged from the lower end 35a of the fifth pipe 35 is exposed to the first condensation guide 430. ) falls on the upper side of the.

The condensation housing 410 includes a condensation upper wall 413 forming an upper side and a condensation lower wall 414 forming a lower side.

The housing entrance 411 is formed in the condensed upper wall 413.

The condensed upper wall 413 is formed to be inclined in the vertical direction.

In this embodiment, the condensation upper wall 413 is spaced apart from the upper side of the condensation heat exchanger 420 and covers the upper side of the condensation heat exchanger 420.

Therefore, even if bubble water is discharged from the fifth pipe 35 and falls, the bubble water is prevented from falling directly into the condensation heat exchanger 420.

In this embodiment, the condensation upper wall 413 is disposed to be inclined downward toward the first condensation guide 430, and even if bubble water falls on the condensation upper wall 413, the inclined surface of the condensation upper wall 413 is maintained. Accordingly, the bubble water flows to the upper side of the first condensation guide 430.

The condensation lower wall 414 guides the bubble water flowing to the lower side of the condensation space 415 to the housing outlet 412. The condensation lower wall 414 is disposed to be inclined downward toward the housing outlet 412.

In this embodiment, the housing outlet 412 is disposed on the opposite side of the housing inlet 411, and this arrangement increases the movement path of the bubble water, thereby increasing the heat exchange time of the bubble water and the condensation heat exchanger 420. You can.

The condensation housing 410 has a first housing side wall 416 disposed to face one side 421 of the condensation heat exchanger 420, and a first housing side wall 416 disposed to face the other side 422 of the condensation heat exchanger 420. It includes a second housing side wall 417.

The condensation upper wall 413 is coupled to the second housing side wall 417 and disposed to be inclined downward in the direction of the first housing side wall 416, and the condensation lower wall 414 is connected to the first housing side wall 416. ) and is disposed to be inclined downward in the direction of the second housing side wall 417.

The first condensation guide 430 and the second condensation guide 440 are disposed inclined toward the condensation heat exchanger 420.

The first condensation guide 430 has a first end 431 in close contact with the first housing side wall 416, and a first other end 432 in close contact with one side 421 of the condensation heat exchanger 420. .

The first end 431 is placed high, and the first other end 432 is placed lower than the first end 431 to form a first guide inclination angle A.

The first condensation guide 430 can guide bubble water from one side to the other through the first guide inclination angle (A), and through this, the bubble water can easily flow into one side of the pin gap. .

A plurality of first condensation guides 430 are arranged to be spaced apart in the above direction, and the gap between the first condensation guides 430 is defined as the first guide gap G1.

The second condensation guide 440 has a second end 442 in close contact with the second housing side wall 417 and a second end 441 in close contact with the other side 422 of the condensation heat exchanger 420. do.

The second other end 442 is placed high, and the second end 441 is placed lower than the second other end 442 to form a second guide inclination angle B.

The first condensation guide 430 and the second condensation guide 440 form an angle of 90 degrees or more and less than 180 degrees.

Through the second guide inclination angle (B), the second condensation guide 440 can guide bubble water from the other side to one direction, and through this, the bubble water can easily flow into the other side of the pin gap. .

A plurality of second condensation guides 440 are arranged to be spaced apart in the above direction, and the gap between the second condensation guides 440 is defined as the second guide gap G2.

In this embodiment, the first guide gap (G1) and the second guide gap (G2) are formed to be the same. Unlike this embodiment, the first guide gap (G1) and the second guide gap (G2) are formed differently, and through this, the flow speed of the bubble water can be formed differently.

When viewed up and down, the first condensation guide 430 and the second condensation guide 440 are arranged in a staggered zigzag shape.

Specifically, the height of each first end 432 of the plurality of first condensation guides 430 and each first end 441 of the plurality of second condensation guides 440 in close contact with the condensation heat exchanger 420. are arranged differently.

The first other end 432 of the first condensation guide 430 and the first end 441 of the second condensation guide 440 are formed to have a length of 1/2 of the first guide gap G1.

Therefore, the first guide drain groove disposed at the first other end 432 of the first condensation guide 430 and penetrating the first condensation guide 430 in the vertical direction, and the second condensation guide 440 It is disposed at the second end 441 and may further include a second guide drain groove penetrating the second condensation guide 440 in the vertical direction.

The first guide drain groove is formed concavely in the direction from the first other end 432 to the first end 431, and the second guide drain groove is formed from the second end 441 to the second other end 442. It is formed concavely in one direction.

When viewed from the top, the first guide drain groove and the second guide drain groove are formed in a square shape.

Through the first guide drain groove and the second guide drain groove, a portion of the bubble water can be drained to the lower side rather than the pin gap, and through this, the first condensation guide 430 and the second condensation guide 440 It has the feature of allowing bubble water to flow even with pin spacing on the lower side that is not directly connected.

A plurality of first guide drain grooves are arranged in the longitudinal direction of the first condensation guide 430, and in this embodiment, three are arranged.

The first guide drainage groove includes a 1-1 guide groove 433 disposed at the front, a 1-3 guide groove 435 disposed at the rear, the 1-1 guide groove 433, and the first guide groove 433. -3 It includes a 1-2 guide groove (434) disposed between the guide grooves (435).

The 1-1 guide groove 433, 1-2 guide groove 434, and 1-3 guide groove 435 are formed at equal intervals, and in this embodiment, this is defined as groove spacing (R). .

A plurality of second guide drain grooves are arranged in the longitudinal direction of the second condensation guide 440, and in this embodiment, two are arranged.

The second guide drain groove includes a 2-1 guide groove 443 disposed at the front and a 2-2 guide groove 444 disposed at the rear.

The 2-1 guide groove 443 and the 2-2 guide groove 444 are spaced apart in the front and rear directions to form a groove spacing (R).

When viewed from the top, the 2-1 guide groove 443 is disposed between the 1-1 guide groove 433 and the 1-2 guide groove 434, and the 1-2 guide groove 434 ) and the 2-2 guide groove 444 is disposed between the 1-3 guide groove 435.

Bubble water discharged downward through the 1-1 guide groove 433, 1-2 guide groove 434, and 1-3 guide groove 435 passes through one side of the condensation heat exchanger 420. Bubble water can flow in through one side of the fin gap, and the bubble water discharged downward through the 2-1 guide groove 443 and the 2-2 guide groove 444 flows through the other side of the condensation heat exchanger 420. It may flow into the other side of the pin gap.

Through the arrangement and structure of the first condensation guide 430 and the second condensation guide 440, the bubble water flowing into the condensation space 415 through the housing entrance 411 is moved downward by its own weight, It flows downward in a zigzag shape while penetrating the condensation heat exchanger 420 in the left and right directions, and then can be discharged into the reaction space 201 through the housing outlet 412.

In this process, sufficient heat exchange can be achieved with the condensation heat exchanger 420, and the condensation efficiency of the refrigerant passing through the condensation heat exchanger 420 can be improved.

In particular, the bubble water is heated while exchanging heat with the condensation heat exchanger 420, and because the heated bubble water is mixed with the mineral or industrial by-product, it has the characteristic of promoting the mineral carbonation reaction.

The chemical composition (unit: weight %) of the above-mentioned industrial by-product aggregate is as follows.

division
Calcium Oxide (CaO) Magnesium Oxide (MgO) Hwang (S) Sulfur trioxide (SO ₃ ) Iron oxide (FeO) Metallic iron (Fe) Basicity (CaO/SIO ₂ )
blast furnace slag aggregate coarse aggregate 45.0 or less 2.0 or less 0.5 or less 3.0 or less fine aggregate 45.0 or less 2.0 or less 0.5 or less 3.0 or less Furnace Oxidized Slag Aggregate coarse aggregate 45.0 or less 10.0 or less 50.0 or less 2.0 or less fine aggregate 45.0 or less 10.0 or less 50.0 or less 2.0 or less Ferronickel Slag Aggregate fine aggregate 5.0 or less 40.0 or less 0.5 or less 13.0 and below 1.0 or less

Since the industrial by-products contain a large amount of alkaline earth metals (Ca ^{2 +} , Mg ^{2 +} ), they are suitable as raw materials for mineral carbonation.

The mineral carbonation device according to this embodiment mixes bubble water containing dissolved carbon dioxide with industrial by-products and promotes the elution of K ⁺ , Na ⁺ , Ca ^{2 +} , and Mg ²⁺ from the industrial by-products to create a mineral carbonation environment ^. promotes

The chemical adjustment of mineral carbonated aggregate using ultra-fine bubbles is not much different from the raw material, and the captured carbon dioxide (in the form of CO ₃ ^2- ) reacts with the Ca ^{2 +} and Mg ^{2 +} ions contained in the aggregate to form a carbonate on the surface or center of the aggregate. CaCO ₃ and MgCO ₃ are formed, through which carbon dioxide can be fixed.

Figure 6 is a flowchart showing a control method of a mineral carbonation device according to the first embodiment of the present invention.

The control method of the mineral carbonation device according to this embodiment includes the steps of detecting the temperature of bubble water stored in the bubble storage device 100 and determining whether the temperature of the bubble water exceeds the reference temperature (S10). If the step is satisfied, a step (S20) of driving the compressor 310 of the temperature control device 300, and after step S20, the water level of the bubble storage device 100 is detected, and the detected water level is the lowest. A step of determining whether the water level is below the level (S30), and if the step S30 is satisfied, water is supplied to the bubble storage device 100 through the water supply device 70, and the bubble water of the bubble generator 20 is supplied. Supplying the bubble storage device 100 (S40), and after step S40, detecting the water level of the bubble storage device again, and determining whether the detected water level is located between the lowest water level and the highest water level. step (S50), and when the step S50 is satisfied, the supply of water through the water supply device (70) is stopped, and only bubble water is supplied to the bubble storage device (100) through the bubble generating device (20). A supply step (S60), and after step S60, a step of detecting the water level of the bubble storage device again and determining whether the detected water level exceeds the highest water level (S70), and satisfying the step S70. In this case, changing the third on/off valve 38 of the bubble generating device 20 to the open state to circulate the bubble water of the bubble storage device 100 with the bubble generating device 20 (S80); After step S80, detecting the temperature of the bubble water of the bubble storage device 100 again, determining whether the detected temperature of the bubble water is between the minimum temperature and the reference temperature (S90), and step S90 If not satisfied, a step (S100) of stopping the compressor 310 is included.

If step S90 is satisfied, it returns to step S10.

In step S20, the compressor 310 of the temperature control device 300 is driven to circulate the refrigerant, and through this, the evaporation heat exchanger 330 provides heat of evaporation to cool the bubble water.

In step S30, it is determined whether the evaporative heat exchanger 330 is submerged in bubble water.

If the water level is excessive or insufficient, water and bubble water are simultaneously supplied through the water supply device 70 and the bubble generator 20 in step S40.

In step S50, it is determined whether the water level of the bubble water exceeds the minimum water level, and if it exceeds the minimum water level, the water supply is stopped in step S60, and only the bubble water of the bubble generator 20 is used in the bubble storage device 100. supplied and stored.

In step S70, it is determined whether the water level of the bubble water exceeds the maximum water level, and if it exceeds the maximum water level, the bubble water is circulated in the bubble generator and bubble storage device in step S80.

The mineral carbonation device may include a control unit for performing the above-described control method, wherein the control unit includes a processor that performs at least one operation. and a memory that stores instructions instructing the at least one operation.

The control unit can be interpreted as a control unit or MCU, or the instructions for performing the above-described control method are packed in the form of firmware (or program or application), and then the packed firmware (or program or application) is loaded into memory. Afterwards, the control method can be performed while being executed by a processor.

Figure 7 is a diagram to explain the concept of mineral carbonation. Figure 8 is a diagram showing performance index items of the results when mineral carbonation is performed using a mineral carbonation device according to an embodiment. Figure 9 is a diagram showing the evaluation method and evaluation environment of the performance index items according to Figure 8.

Mineral carbonation can be classified into direct mineral carbonation, which directly reacts the mineralized material with C0 ₂ , and indirect mineral carbonation, which extracts Ca or Mg components that can react with C0 ₂ from the mineralized material and then carbonates them.

In the case of direct mineral carbonation, C0 ₂ is reacted and immobilized on the mineralized material itself under high temperature and high pressure conditions. The process is relatively simple and has the advantage of being able to recover high temperature heat.

Indirect mineral carbonation induces a carbonation reaction by extracting reaction target ions from mineralized materials, so the carbonate conversion rate is fast and high purity carbonation materials can be synthesized.

Despite these advantages, a separate extraction solvent such as strong acid, ammonium, and caustic soda must be used to extract alkaline earth metals in the indirect mineral carbonation process, which makes the process somewhat complicated, increases production costs, and reduces residual substances after carbonate generation. The presence of this causes an additional increase in the overall process cost due to the environmental burden of having to deal with it.

Construction materials produced through indirect mineral carbonation using industrial by-products and construction waste as mineralization materials have limited uses due to low-grade calcium carbonate, solidifying agent, and asphalt filler, and when used in actual concrete production, they must be replaced with a lower content. There are limitations to its use.

Accordingly, it is advantageous to develop technology to produce recycled aggregate by treating concrete itself as a mineralized material and curing it in a high-concentration C0 ₂ environment or by using supercritical C0 ₂ to stabilize the steelmaking slag aggregate and induce C0 ₂ fixation.

In the case of C0 ₂ curing, it is possible to reduce energy consumption by shortening the curing time with direct carbonation technology that can replace steam curing in the production process of secondary concrete products using greenhouse gases emitted from industrial processes. When this technology is applied, the concrete's Mechanical performance and durability can be improved.

Direct mineral carbonation technology using supercritical C0 ₂ also enables reaction with mineralized materials within a short period of time. In particular, due to the nature of the supercritical fluid, it has gas-like transport characteristics and liquid-like solvent properties, so it can be used under appropriate temperature and pressure conditions. It has the advantage of excellent carbonation efficiency because it quickly penetrates and reacts inside the target material.

This study is about the development of technology to realize carbon neutrality in the construction industry. In utilizing ferronickel slag, an industrial by-product from steel mills, as an aggregate, the reaction between the collected C0 ₂ and the material was conducted by applying ultra-fine bubble technology. induces and eventually forms MgC0 ₃ to permanently store C0 ₂ .

In order to lead CCUS technology in response to climate change in the field of construction/building materials, the ultimate goal is to develop carbon-neutral concrete based on C0 ₂ fixed artificial aggregate using steel mill by-products. To this end, more than 15% of C0 ₂ is fixed in the ferronickel slag aggregate. The purpose is to manufacture precast reinforced concrete members that ensure the basic properties and durability of concrete including the relevant aggregate.

In the detailed description of the present invention, specific embodiments have been described, but of course, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the patent claims described later, but also by the scope of this patent claim and equivalents.

10: carbon dioxide tank 20: bubble generator
100: bubble storage device 200: reaction device
300: Temperature control device 400: Condensation assembly

Claims (8)

In the mineral carbonation device,
A carbon dioxide tank (10) storing carbon dioxide;
A bubble generator (20) that generates bubble water by injecting carbon dioxide supplied from the carbon dioxide tank (10) into stored water in the form of ultra-fine bubbles;
A bubble storage device (100) that receives and stores the bubble water generated by the bubble generator (20);
A reaction device (200) to which minerals or industrial by-products are supplied and which receives bubble water from the bubble storage device (100) to react with the minerals or industrial by-products;
A mineral carbonation device comprising a water supply device (70) that supplies water to at least one of the bubble generating device (20) or the bubble storage device (100). In claim 1,
The water supply device 70 includes a first water supply pipe 71 that supplies water to the bubble storage device 100;
a second water supply pipe (72) supplying water to the bubble generating device (20);
A first water supply valve (73) that opens and closes the first water supply pipe (71);
It includes a second water supply valve 74 that opens and closes the second water supply pipe 72,
A mineral carbonation device in which the second water supply pipe (72) is branched from the first water supply pipe (71) and connected to the bubble generator (20). In claim 2,
A first pipe (31) connecting the carbon dioxide tank (10) and the bubble generator (20);
A second pipe 32 connects the bubble generator 20 and the bubble storage device 100 and supplies bubble water from the bubble generator 20 to the bubble storage device 100;
A third pipe 33 connects the bubble generating device 20 and the bubble storage device 100 and supplies water or bubble water from the bubble storage device 100 to the bubble generating device 20;
A fourth pipe 34 connects the bubble storage device 100 and the carbon dioxide tank 10 and recovers carbon dioxide from the bubble storage device 100;
A first control valve 40 disposed in the first pipe 31 and controlling at least one of the flow rate or mass of carbon dioxide supplied from the carbon dioxide tank 10 to the bubble generator 20;
A gas recovery device 60 disposed in the fourth pipe 34 and recovering carbon dioxide from the bubble storage device 100 to the carbon dioxide tank 10 according to the carbon dioxide concentration of the bubble storage device 100;
A fifth pipe 35 connects the bubble storage device 100 and the reaction device 200 and supplies bubble water from the bubble storage device 100 to the reaction device 200; and
A mineral carbonation device further comprising a second control valve (50) disposed in the fifth pipe (35) and controlling at least one of the flow rate or mass of bubble water passing through the fifth pipe (35). In claim 3,
A mineral carbonation device further comprising a return compressor (39) that forces bubble water or water to flow through the third pipe (33) or the bubble storage device (100) to the bubble generator (20). In claim 4,
The bubble storage device 100,
A storage housing (110) with a storage space (105) formed therein;
A temperature control device 300 that controls the temperature of the bubble water stored in the storage housing 110;
A water level detection device 130 disposed in the storage housing 110 and detecting the water level of bubble water stored in the storage housing 110;
A first sensing device 140 that detects the dissolved carbon dioxide concentration of the bubble water stored in the storage housing 110;
A mineral carbonation device including a second sensing device (150) that detects the carbon dioxide concentration of the storage housing (110). A carbon dioxide tank (10) storing carbon dioxide;
A bubble generator (20) that generates bubble water by injecting carbon dioxide supplied from the carbon dioxide tank (10) into stored water in the form of ultra-fine bubbles;
A bubble storage device (100) that receives and stores the bubble water generated by the bubble generator (20);
A reaction device (200) to which minerals or industrial by-products are supplied and which receives bubble water from the bubble storage device (100) to react with the minerals or industrial by-products; and
A method of controlling a mineral carbonation device comprising a water supply device (70) that supplies water to at least one of the bubble generating device (20) or the bubble storage device (100),
Detecting the temperature of the bubble water stored in the bubble storage device 100 and determining whether the temperature of the bubble water exceeds the reference temperature (S10);
If the step S10 is satisfied, driving the compressor 310 of the temperature control device 300 (S20);
After step S20, detecting the water level of the bubble storage device 100 and determining whether the detected water level is lower than the minimum water level (S30);
When the step S30 is satisfied, water is supplied to the bubble storage device 100 through the water supply device 70, and bubble water from the bubble generator 20 is supplied to the bubble storage device 100. Step (S40);
After step S40, detecting the water level of the bubble storage device 100 again and determining whether the detected water level is located between the lowest water level and the highest water level (S50); and
If the step S50 is satisfied, stopping the water supply through the water supply device 70 and supplying only bubble water to the bubble storage device 100 through the bubble generating device 20 (S60); A control method of a mineral carbonation device comprising. A non-transitory recording medium on which a program for executing the control method according to claim 6 is recorded and which can be read by a computer. A computer program recorded on a non-transitory recording medium for executing the control method according to claim 6 in a mineral carbonation device.

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