KR20190142921A - Barrier type co2 mineralization reactor - Google Patents

Abstract

A partition-type carbon dioxide mineralization reactor is introduced. The partition-type carbon dioxide mineralization reactor comprises: a raw material storage tank in which an aqueous calcium solution can be accommodated; a gas storage tank in which carbon dioxide gas is stored; a mixer for receiving and mixing the aqueous calcium solution and the carbon dioxide gas from the raw material storage tank and the gas storage tank; a reaction tank comprising a reaction path through which the reaction of a mixed mixture takes place in the mixer, and providing a plurality of partitions for guiding the movement of the mixture to extend the reaction path of the mixture; and a discharge tank for discharging a reactant reacted in the reaction tank and an unreacted material to outside.

Description

BARRIER TYPE CO2 MINERALIZATION REACTOR}

The present invention relates to a bulkhead carbon dioxide mineralization reactor.

In general, the burning of fossil fuels such as coal, oil and natural gas for energy production raises the concentration of carbon dioxide in the atmosphere, causing global warming.

Accordingly, various technologies have been developed to reduce carbon dioxide emissions. As an example, the mineral carbonation technology for mineral carbonation of carbon dioxide may include a kind of reactant, a pretreatment technology for natural minerals and industrial by-products, and a carbon dioxide immobilization technology.

This mineral carbonation technology can be used for the high value-adding of gypsum resources as well as to reduce the carbon tax or to trade carbon credits. In addition, the carbonate produced by fixing carbon dioxide by mineral carbonation technology can be utilized in high added value such as optical equipment, semiconductors and fillers according to its purity and particle size.

However, in the case of the conventional mineral carbonation technology, as waste concrete, fly ash and sludge having low CaO content are used as raw materials for mineral carbonation of carbon dioxide, heavy metals need to be removed from the residue after the reaction, and thus additional costs are incurred. Sometimes.

In particular, when the reaction time (retention time) of carbon dioxide for mineral carbonation of carbon dioxide gas is short, the generation rate of unreacted carbon dioxide gas may be increased. In addition, when it is difficult to grasp the process of carbonation carbon dioxide minerals, the overall control of the carbonation process is not easy.

Accordingly, there is a demand for a technology capable of increasing the carbonic acid conversion rate of carbon dioxide gas through an effective reaction between carbon dioxide gas and raw materials.

Patent Document: Domestic Publication No. 10-2016-0019011 (2016. 02. 18. published)

Embodiments of the present invention are to provide a partition type carbon dioxide mineralization reactor that can efficiently convert carbon dioxide to carbonate.

In order to achieve the above object, the partition type carbon dioxide mineralization reactor of the present invention comprises: a raw material storage tank capable of containing an aqueous calcium solution; A gas storage tank in which carbon dioxide gas is stored; A mixer configured to receive and mix the aqueous calcium solution and the carbon dioxide gas from the raw material storage tank and the gas storage tank; A reaction tank including a reaction path in which the reaction of the mixture mixed in the mixer occurs, and providing a plurality of partition walls for guiding movement of the mixture so that the reaction path of the mixture is extended; A feed pump providing pressure to the mixture for moving along the reaction path; And it may include a discharge tank for discharging the reactants and the unreacted material in the reaction tank to the outside.

At this time, the reaction tank is a housing for providing a plurality of chambers partitioned by the partition; Connecting piping alternately connecting upper portions of the plurality of chambers to move the mixture; And a through hole provided in the lower portion of the partition wall such that the mixture in the chamber moved through the connection pipe is discharged to the adjacent chamber.

In addition, the reactor may further include a line mixer mounted to the through hole.

In addition, the reaction tank is a hopper provided in the lower portion of the housing so that foreign matter in the chamber is discharged to the outside; A stirrer for stirring the mixture in the chamber; And a circulation pump for feeding back the mixture discharged from the hopper to the upper portion of the housing.

In addition, the present invention is a measuring instrument for measuring the carbonate conversion rate, pH concentration and carbon dioxide concentration of the mixture in the reactor; And in order to reach the predetermined target value of the carbonate conversion rate, pH concentration and carbon dioxide concentration measured by the measuring instrument, the control unit for controlling the supply amount of the carbon dioxide gas and the aqueous solution of calcium in the reactor.

Embodiments of the present invention has the advantage that by maximizing the contact time between the carbon dioxide gas and the raw material for mineral carbonation, it is possible to improve the carbonate conversion rate is converted carbon dioxide gas to carbonate.

In addition, embodiments of the present invention can measure the reaction state between the raw material and the carbon dioxide gas in real time, and by adjusting the reaction environment so that the measured measured value reaches a predetermined target value, thereby adjusting the carbonate conversion rate, pH concentration and carbon dioxide concentration The advantage is that it can be optimized.

1 is a block diagram showing a partition-type carbon dioxide mineralization reactor according to the present invention.
2 is a perspective view showing a reaction tank of a partition type carbon dioxide mineralization reactor according to the present invention.
Figure 3 is a block diagram showing the control logic of the partitioned carbon dioxide mineralization reactor according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation according to the embodiment of the present invention. The following description is one of several aspects of the invention that can be claimed, and the following description may form part of the detailed description of the invention. However, in describing the present invention, a detailed description of known configurations or functions may be omitted to clarify the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. These terms are only used to distinguish one component from another. When a component is said to be 'connected' or 'connected' to another component, it may be directly connected to or connected to that other component, but it may be understood that another component may exist in between Should be. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

1 is a block diagram showing a partition type carbon dioxide mineralization reactor according to the present invention, Figure 2 is a perspective view showing a reaction tank of the partition type carbon dioxide mineralization reactor according to the present invention, Figure 3 is a partition type carbon dioxide according to the present invention A block diagram showing the control logic of the mineralization reactor.

1 to 3, the bulkhead type carbon dioxide mineralization reactor 10 according to an embodiment of the present invention includes a raw material storage tank 110, a gas storage tank 120, a mixer 200, and a reaction tank 300. ), A supply pump 410, a discharge tank 500, a meter 600, and a controller 700.

Specifically, the raw material storage tank 110 is a water tank in which calcium aqueous solution is accommodated, and high purity CoO and water (H 2 O) may be injected into the raw material storage tank 110. As an example, the raw material storage tank 110 may be temporarily stored in an aqueous calcium solution (CoO aqueous solution) mixed with 0.1 to 5 wt% of CoO and water (H 2 O).

The metering pump 430 may be mounted on the outlet side pipe of the raw material storage tank 110. The metering pump 430 may discharge a predetermined amount of calcium aqueous solution from the raw material storage tank 110 to the mixer 200. Carbon dioxide may be supplied from the gas storage tank 120 to the outlet side pipe of the metering pump 430 through which the calcium aqueous solution is discharged.

The gas reservoir 120 may include a reservoir in which a high concentration of carbon dioxide gas is stored. The outlet pipe of the gas storage tank 120 may be provided with an on-off valve 440 for adjusting the discharge amount of the carbon dioxide gas. For example, the carbon dioxide gas stored in the gas reservoir 120 may be selectively supplied to the outlet side pipe of the metering pump 430 through the adjustment of the on / off valve 440.

In this embodiment, the gas storage tank 120 has been described as a storage tank in which carbon dioxide is stored in a gas form, but is not limited thereto. In addition to the gas form, the gas storage tank 120 may store carbon dioxide in a liquid form. to be.

The mixer 200 may receive the calcium aqueous solution and the carbon dioxide gas from the raw material storage tank 110 and the gas storage tank 120, and mix the supplied calcium aqueous solution and the carbon dioxide gas. To this end, the mixer 200 may be equipped with a mixer (not shown) for evenly stirring the aqueous calcium solution and carbon dioxide gas.

The reactor 300 may receive a mixture of a calcium aqueous solution and carbon dioxide gas from the mixer 200, and may generate carbonate (CaCO 3) through a chemical reaction of the aqueous calcium solution and carbon dioxide gas. Since the chemical reaction of the aqueous calcium solution and carbon dioxide gas is the same as the chemical reaction between the conventional aqueous calcium solution and carbon dioxide gas, a detailed description thereof will be omitted.

The reactor 300 may include a housing 310, a connection pipe 320, a through hole 330, a line mixer 340, a hopper 350, an agitator 360, and a circulation pump 370. Here, the housing 310 may be provided in the form of a hexahedron or cylindrical form. The housing 310 may be provided with an agitator 360 for stirring a mixture of an aqueous calcium solution and carbon dioxide gas. The stirrer 360 may smoothly move the mixture moving between the chambers while stirring the mixture contained in the housing 310.

Inside the housing 310, a plurality of chambers C1, C2, C3, C4 and C5 may be provided which are partitioned by a plurality of partition walls 311. Each chamber C1, C2, C3, C4, C5 may be in communication with each other through a connection pipe 320 or through holes 330, thereby providing a reaction path L of the mixture for the reaction of the mixture.

For example, the inner space of the housing 310 may be partitioned by a plurality of partitions 311 and divided into a plurality of chambers C1, C2, C3, C4, and C5, and the plurality of chambers C1, C2, C3, The C4 and C5 communicate with each other through the connecting pipe 320 or the through hole 330 to form the reaction path L of the mixture, whereby the reaction path L of the mixture extends in the housing 310. Can be implemented.

The connection pipe 320 is a pipe that interconnects the chambers adjacent to each other, and may connect the plurality of chamber upper portions to move the mixture in the housing 310. For example, the connection pipe 320 may connect between the first chamber C1 and the second chamber C2 into which the mixture is introduced, and may connect between the third chamber C3 and the tetrahedral chamber C4.

The through hole 330 is a discharge hole provided in the lower portion of the partition 311 and may discharge the mixture in the chamber moved through the connection pipe 320 to the adjacent chamber. For example, the through hole 330 is a partition 311 disposed between the second chamber C2 and the third chamber C3 and a partition 311 disposed between the fourth chamber C4 and the fifth chamber C5. ) May be formed.

A line mixer 340 is a linear mixer for smoothly mixing the mixture as the mixture moves between the chambers, and may provide a structure that can be mixed by itself as the mixture moves. For example, the line mixer 340 may be provided in the form of a pipe corresponding to the through hole 330, the blade (not shown) of the twisted shape so that the mixture is mixed when the line mixer 340 moves. Can be arranged.

In the present embodiment, the blade-built line mixer 340 has been described. However, the present invention is not limited thereto, and the through-hole 330 of the partition 311 may use a line mixer that provides various structures for effectively mixing the mixture. Of course.

The hopper 350 may be provided below the housing 310. Hopper 350 may discharge the foreign matter precipitated in the chamber to the outside. In addition, the hopper 350 may be equipped with a circulation pump 370. The circulation pump 370 may circulate the mixture in the chamber in the vertical direction by moving the mixture moved to the lower portion of the housing 310 to the upper portion of the housing 310.

In this embodiment, the hopper 350 is structured to be connected in communication with the lower portion of the housing 310, but is not limited to this, the mixture is selected to move between the upper portion of the hopper 350 and the lower portion of the housing 310 Opening and closing door (not shown) for blocking may be provided.

When the opening and closing door is installed between the upper portion of the hopper 350 and the lower portion of the housing 310, the opening and closing door is opened if the foreign matter precipitated in the chamber is to be discharged or the mixture is stirred in the vertical direction of the housing 310. By opening), the foreign substance may be discharged to the outside through the hopper 350, or the mixture may be stirred in the up and down direction of the housing 310 by using a circulation pump. On the other hand, if you want to move the mixture only in the chamber, it is possible to close the opening and closing (Close) door.

Discharge tank 500 is a tank for temporarily storing the mixture moved in the reaction tank 300, the upper and lower portions of the discharge tank 500 may be provided with a discharge port for discharging the reactant or carbon dioxide. Accordingly, the reactants reacted in the reaction tank 300 may be discharged to the lower portion of the discharge tank 500, and then may be manufactured as carbonate through the dehydrator 450 and the dryer 460. On the other hand, the unreacted carbon dioxide gas in the reaction tank 300 may be discharged to the outside through the upper portion of the discharge tank (500). The unreacted carbon dioxide gas in the reactor 300 may be fed back to the gas reservoir 120.

The meter 600 may measure the carbonate conversion rate, pH concentration, and carbon dioxide concentration of the mixture in the reaction vessel 300. In this embodiment, the meter 600 includes a first meter 610 that measures the mixture in the first chamber C1, a second meter 620 that measures the mixture in the second chamber C2, and a third chamber C3. And a third meter 630 for measuring the mixture, a fourth meter 640 for measuring the mixture in the fourth chamber C4, and a fifth meter 650 for measuring the mixture in the fifth chamber C5. . Measurement information about the carbonate conversion rate, pH concentration, and carbon dioxide concentration measured by these meters 600 may be applied to the controller 700.

The controller 700 may receive measurement information on the carbonate conversion rate, pH concentration, and carbon dioxide concentration from the measuring device 600. The controller 700 compares the measured information value of the measuring device 600 with a preset target value, and then supplies a supply amount of carbon dioxide gas and calcium aqueous solution to the reactor 300 such that the measured information value reaches the preset target value. I can regulate it.

For example, when the measurement information value received from the measuring device 600 is less than the preset target value, the controller 700 may apply an operation signal for increasing the supply amount of carbon dioxide gas to the on-off valve of the gas reservoir 120. . Alternatively, the controller 700 may apply an operation signal for increasing the supply amount of the raw material to the metering pump of the raw material storage tank 110.

Referring to the operation of the present invention made of such a configuration as follows.

First, raw materials (high purity CaO) and water (H 2 O) are introduced into the raw material storage tank 110. When the aqueous calcium solution mixed with the raw material and water is accommodated in the raw material storage tank 110, the aqueous calcium solution in the raw material storage tank 110 is moved to the mixer 200 through the metering pump 430. At this time, the carbon dioxide of the gas reservoir 120 is supplied to the outlet pipe of the metering pump 430.

When the calcium aqueous solution of the raw material storage tank 110 and the carbon dioxide gas of the gas storage tank 120 are introduced into the mixer 200, in the mixer 200, the first aqueous contact is made between the aqueous calcium solution and carbon dioxide gas. Can be mixed with each other. The mixture of the calcium aqueous solution and carbon dioxide gas mixed in the mixer 200 is moved to the reaction tank 300 through the feed pump 410.

The mixture moved to the reactor 300 may react with each other between the aqueous calcium solution and carbon dioxide gas while moving the plurality of chambers C1, C2, C3, C4, and C5 provided in the reactor 300. At this time, since the aqueous calcium solution and carbon dioxide gas moves the chamber along the reaction path (L), the reaction time (contact time) between the aqueous calcium solution and carbon dioxide gas can be increased, and eventually, the aqueous calcium solution and carbon dioxide gas in the reactor 300 A smooth reaction of the liver can be achieved.

 For example, the mixture introduced into the first chamber C1 of the reaction vessel 300 is moved to the second chamber C2 through the connecting pipe 320, and the mixture moved to the second chamber C2 is divided into a partition wall ( Through the through hole 330 of 311, the mixture is moved to the third chamber (C3), the mixture moved to the third chamber (C3) is moved to the fourth chamber (C4), through the connecting pipe 320, The mixture moved to the fourth chamber C4 is moved to the fifth chamber C5 through the through hole 330 of the partition 311, and then to the discharge tank 500. In this case, since the line mixer 340 is installed in the through hole 330 of the partition 311, the mixture may pass through the line mixer 340, and more effective mixing may be performed.

Then, in the mixture moved to the discharge tank 500, the reactants reacted in the reaction tank 300 is discharged to the lower portion of the discharge tank 500, the unreacted carbon dioxide gas in the reaction tank 300 is discharge tank 500 Is discharged to the outside through the top of the. At this time, the reactant may be prepared as carbonate (CaCO 3), which is a final product, through the dehydrator 450 and the dryer 460.

On the other hand, the mixture that moves the reaction tank 300, by the meter 600, the carbonate conversion rate, pH concentration and carbon dioxide concentration of the mixture can be measured.

For example, when the carbonate conversion rate, pH concentration and carbon dioxide concentration of the mixture in the reaction vessel 300 are measured by the meter 600, the control unit 700 measures measurement information on the carbonate conversion rate, pH concentration and carbon dioxide concentration. 600, the amount of supply of carbon dioxide gas and calcium aqueous solution to the reactor 300 is compared with the measured information of the measuring device 600 and the preset target value, so that the measured information reaches the preset target value. I can regulate it.

As described above, the present invention can maximize the contact time between the raw material for mineral carbonation and the carbon dioxide gas, thereby improving the conversion rate of carbonate in which carbon dioxide gas is converted to carbonate, and measuring the reaction state between the raw material and carbon dioxide gas in real time. It is possible to optimize the carbonate conversion rate, pH concentration and carbon dioxide concentration by adjusting the reaction environment so that the measured measured value reaches a predetermined target value.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. For example, those skilled in the art can change the material, size, etc. of each component according to the application field, or combine or replace the embodiments in a form that is not clearly disclosed in the embodiments of the present invention, this is also the present invention It will not go beyond the scope of the. Therefore, the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and such modified embodiments should be included in the technical spirit described in the claims of the present invention.

110: raw material storage tank 120: gas storage tank
200: mixer 300: reactor
310: housing 311: bulkhead
320: connecting pipe 330: through hole
340: line mixer 350: hopper
360: Agitator 360: Circulation pump
410: supply pump 430: metering pump
440: opening and closing valve 450: dehydrator
460: dryer 600: instrument
700: control unit

Claims (5)

Raw material storage tank which aqueous calcium solution is accommodated in;
A gas storage tank in which carbon dioxide gas is stored;
A mixer configured to receive and mix the aqueous calcium solution and the carbon dioxide gas from the raw material storage tank and the gas storage tank;
A reaction tank including a reaction path in which the reaction of the mixture mixed in the mixer occurs, and providing a plurality of partition walls for guiding the movement of the mixture such that the reaction path of the mixture is extended;
A feed pump providing pressure to the mixture for moving along the reaction path; And
A partitioned carbon dioxide mineralization reactor comprising a discharge tank for discharging the reactants and the unreacted material reacted in the reactor to the outside. The method of claim 1,
The reactor is
A housing providing a plurality of chambers partitioned by the partition wall;
Connecting piping alternately connecting upper portions of the plurality of chambers to move the mixture; And
A partitioned carbon dioxide mineralization reactor including a through hole provided in a lower portion of the partition wall so that the mixture in the chamber moved through the connecting pipe is discharged to an adjacent chamber. The method of claim 2,
The reactor is
A partitioned carbon dioxide mineralization reactor further comprising a line mixer mounted to the through hole. The method of claim 1,
The reactor is
A hopper provided in the lower portion of the housing to discharge foreign substances in the chamber to the outside;
A stirrer for stirring the mixture in the chamber; And
And a circulation pump for feeding back the mixture discharged from the hopper to the upper portion of the housing. The method of claim 1,
A meter for measuring the carbonate conversion rate, pH concentration and carbon dioxide concentration of the mixture in the reactor; And
And a control unit for controlling the supply amount of the carbon dioxide gas and the calcium aqueous solution in the reactor to reach the predetermined target value of the carbonate conversion rate, pH concentration and carbon dioxide concentration measured by the measuring instrument.

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