KR101767140B1 - Dry sorbent CO2 capturing system including function of supplying water using energy in system and operation method thereof - Google Patents

Abstract

The present invention relates to a dry carbon dioxide capture system, a water supply method, and a method of operating the collection system that can supply water using energy generated in the process itself. To an apparatus for supplying water into a recovery reactor of a dry carbon dioxide capture system, the apparatus comprising: an exhaust gas cooling unit for cooling an exhaust gas to be introduced into a recovery reactor; A first heat exchange passage through which the exhaust gas flows into the exhaust gas cooling section through a separate line to absorb the heat of the exhaust gas to heat the water; An energy storage unit for storing moisture produced in the first heat exchange passage; And a water supply unit for supplying water stored in the energy storage unit to the collection reactor. [0002] The present invention relates to a water supply apparatus using energy generated in a collection system.

Description

Technical Field [0001] The present invention relates to a dry carbon dioxide capture system, a water supply method, and a method for operating the same, which can supply water using energy generated from a process itself,

The present invention relates to a dry carbon dioxide capture system, a water supply method, and a method of operating the collection system that can supply water using energy generated in the process itself.

Conventionally, a wet process was used for the CO ₂ recovery process. That is, a method in which CO ₂ -containing gas is passed through a solution of an amine-based system to absorb CO ₂ , and the solution is regenerated and used in a regeneration tower. Such a wet method has a disadvantage in that wastewater is additionally generated in the process .

Accordingly, a CO ₂ recovery method by a dry method has been proposed as an alternative to solve the disadvantage of the wet method. System using the dry method is the that the recovery of CO ₂ using two reactors, removal of adsorbing the CO2 supply into the recovery reactor to a solid absorbent (dry absorbent), and wherein the solid absorbing agent is introduced into the regeneration reactor adsorbing CO ₂ And then supplying the solid absorbent to the recovery reactor again.

FIG. 1 shows a configuration of a conventional dry carbon dioxide capture system 1. As shown in FIG. As shown in FIG. 1, the exhaust gas containing carbon dioxide supplied from the outside through the exhaust gas supply pipe flows into the recovery reactor 40. Then, in the recovery reactor (40), the exhaust gas comes into contact with the solid absorbent to be absorbed.

At this time, the following reaction occurs.

M ₂ CO ₃ (s) + CO ₂ (g) + H ₂ O (g) 2MHCO ₃ (s)? 2MHCO ₃ (s)

M ₂ CO ₃ (s) is an alkali-based solid absorbent, M is Na or K, s is a solid state, and g is a gaseous state. The solid absorbent absorbing the carbon dioxide is discharged to the upper side of the recovery reactor 40 together with the gas and flows into the recovery cyclone 50. Only the solid absorbent absorbing carbon dioxide is separated through the recovery cyclone 50 and discharged to the lower side, and the gas is discharged to the upper side.

The solid absorbent absorbing the carbon dioxide discharged from the recovered cyclone 50 is introduced into the regeneration reactor 70 through the loop chamber 60. In the regeneration reactor 70, the regeneration gas is introduced and the reverse reaction of the reaction formula occurs, so that the carbon dioxide is separated from the solid absorbent absorbing the carbon dioxide.

Then, the carbon dioxide and the solid absorbent are separated and discharged from the regeneration reactor 70, and only carbon dioxide and water vapor, which are gases through the regeneration cyclone 73, are discharged to the upper side and collected. At the lower side of the regeneration reactor 70, a solid absorbent is discharged, cooled through the absorbent cooler 3, and then recycled back to the recovery reactor 40.

At present, carbon dioxide in the combustion flue gas from the coal-fired power plant is 13 ~ 15 vol.%, But since the flue gas desulfurization (FGD) is operated at about 50 ° C, the water content in the combustion flue gas is about 10 ~ 12 vol.%.

In order to increase the reaction rate of the reaction equation, the molar ratio of H2O to CO2, which is a reaction material, should be operated at a level of about 1.5, which is slightly higher than the stoichiometric coefficient.

In this case, the additional water required for the reaction should be injected into the recovery reactor, and unreacted water in the injected water is discharged through the discharge port. Therefore, the additional injected water must be continuously consumed and continuously supplied with water.

Conventionally, in order to inject moisture into the beating reactor, a separate steam generator is provided to consume additional energy in order to continuously supply the saturated steam. Therefore, there is a problem that excessive energy is consumed, the system is uneven, and it is not economical.

Therefore, there has been a demand for a method capable of supplying water necessary for the recovery reactor by utilizing the energy that is naturally generated and consumed in the carbon dioxide capture process without consuming any additional energy.

Japanese Laid-Open Patent Application No. 2005-60137 Korea Patent Publication No. 2013-0039185 Korea Patent Publication No. 2012-0058992 Korean Patent No. 1336778

Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for supplying water necessary for a recovery reactor using self- The present invention is directed to a dry carbon dioxide capture system, a water supply method, and a method of operating the capture system, which can supply water using energy generated in the capture system.

According to one embodiment of the present invention, the water injection necessary for the recovery reactor for absorbing CO ₂ using the alkali-based solid absorbent is performed by supplying the energy of the combustion exhaust gas cooling unit and the high temperature gas discharged from the regeneration cyclone CO2 + H2O) The energy that separates the high concentration of CO2 by condensing H2O in the stream, and the absorbent cooler that is cooled to 70 ℃ and supplied to the recovery reactor are divided into two, so that the solid absorbent is 100 The present invention is directed to a dry carbon dioxide capture system capable of supplying water required for a recovery reactor by using energy obtained by cooling down to about < RTI ID = 0.0 >

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

A first object of the present invention is to provide an apparatus for supplying moisture into a recovery reactor of a dry carbon dioxide capture system, comprising: an exhaust gas cooling unit for cooling an exhaust gas to be introduced into a recovery reactor; A first heat exchange passage through which the exhaust gas flows into the exhaust gas cooling section through a separate line to absorb the heat of the exhaust gas to heat the water; An energy storage unit for storing moisture produced in the first heat exchange passage; And a water supply unit for supplying the water stored in the energy storage unit to the collection reactor. The water supply unit may be a water supply unit using energy generated in the collection system.

An absorbent cooler for cooling the solid absorbent separated and discharged by the regeneration reactor and the regeneration cyclone; And a second heat exchange channel which is connected to the absorbent cooler through a separate line and absorbs heat of the absorbent to heat water, and moisture produced in the second heat exchange channel is stored in the energy storage unit .

A gas cooler for cooling carbon dioxide separated and discharged from the regeneration reactor of the dry carbon dioxide capture system; And a third heat exchange channel connected to the first heat exchange channel and heated by absorbing the heat of the carbon dioxide introduced into the gas cooler and heated by the first heat exchange channel, And the produced water is stored.

A first water pump provided at one side of the first heat exchange channel for pumping the water stored in the first water tank to the exhaust gas cooling unit side; and a second water pump provided at one side of the second heat exchange channel, And a second water pump for pumping the water to the absorbent cooler side.

The apparatus further includes a control unit for controlling the first water pump to control the flow rate of water flowing into the exhaust gas cooling unit side and controlling the second water pump to control the flow rate of water flowing into the absorbent cooling unit .

The steam generator includes a steam generator installed at one side of the energy storage unit to heat moisture stored therein, and a water supply line provided between the energy storage unit and the water supply unit to supply moisture stored in the energy storage unit to the water supply unit And a steam supply pump for pumping the steam.

The controller may further comprise a temperature sensor for measuring the temperature of the water stored in the energy storage unit, wherein the controller controls the first water pump, the second water pump, the steam generator, And controls the driving of the steam supply pump.

A second object of the present invention is to provide a method for supplying water into a recovering reactor of a dry carbon dioxide collecting system in which a flue gas to be introduced into a recovery reactor flows into an exhaust gas cooling section, Cooling the exhaust gas, absorbing heat of the exhaust gas to heat the water; The carbon dioxide discharged from the regeneration reactor of the dry carbon dioxide capture system flows into the gas cooler and the water heated in the first heat exchange channel flows into the gas cooler through the third heat exchange channel connected to the first heat exchange channel, Absorbing the heat of carbon dioxide and heating it; Storing water produced in the third heat exchange passage in an energy storage unit; And supplying water stored in the energy storage unit to the recovery reactor through a water supply unit. [0031] According to another aspect of the present invention, there is provided a method of supplying moisture using energy generated in a collection system.

Then, the solid absorbents separated and discharged by the regeneration reactor and the regeneration cyclone are introduced into the absorbent cooler, the water is introduced into the absorbent cooler through the second heat exchange path, which is a separate line, and absorbs the heat of the absorbent to be heated step; And storing the moisture produced in the second heat exchange passage in the energy storage unit.

The method may further include the step of the temperature sensor measuring the temperature of the moisture stored in the energy storing unit.

The control unit controls the first water pump provided in the first heat exchange channel based on the value measured by the temperature sensor to adjust the flow rate of water flowing into the exhaust gas cooling unit, Controls the water pump to control the flow rate of water flowing into the absorber cooler, and controls the operation of the steam generator and the steam supply pump.

A third object of the present invention is to provide a dry carbon dioxide capture system comprising: a water supply device according to the first object mentioned above; A recovery reactor for introducing the exhaust gas cooled by the exhaust gas cooling unit of the water supply device and contacting the solid absorbent to the exhaust gas to recover carbon dioxide in the exhaust gas; A recovery cyclone for separating the gas discharged from the recovery reactor and the solid absorbent absorbing carbon dioxide; A regenerating reactor in which the solid absorbent absorbing the carbon dioxide separated from the recovered cyclone enters and reacts with the regeneration gas to separate the carbon dioxide; A regenerative cyclone separating and discharging the carbon dioxide discharged from the regeneration reactor and the solid absorbent; An absorbent cooler in which a solid absorbent discharged from the regenerating cyclone flows and is cooled; And a solid recycle tube provided between the absorbent cooler and the recovery reactor to allow the cooled solid absorbent to flow into the recovery reactor, wherein water is heated via the exhaust gas cooling unit through the first heat exchange channel, The gas is introduced into the gas cooler connected to the gas discharge pipe of the regenerating cyclone through the third heat exchange channel and heated, the water is heated via the second heat exchange channel via the absorbent cooler, the heated moisture is stored in the energy storage, The moisture supply unit of the water supply device connected to the energy storage unit supplies moisture to the flue gas introduced into the flue gas cooling unit. The dry carbon dioxide capture system can supply water using energy generated in the process itself .

The exhaust gas cooling unit may further include a first exhaust gas cooling unit for heating the water to cool the exhaust gas by exchanging heat between the exhaust gas supplied with the moisture by the water supply unit and the water introduced by the first heat exchange path, And a second exhaust gas cooling unit continuously provided at a discharge end of the first exhaust gas cooling unit to cool the exhaust gas.

The absorbent cooler may include a solid absorbent supplied through a solid discharge pipe of the regeneration reactor and a regeneration cyclone, and water introduced through the second heat exchange flow path to heat the water to cool the exhaust gas, And a second absorbent cooler continuously provided at the first absorbent cooler discharge end to cool the solid absorbent.

The gas cooler may further include a first gas cooler for exchanging heat between the carbon dioxide supplied through the gas discharge pipe of the regenerating cyclone and the moisture introduced by the third heat exchange path to evaporate the moisture and cool the carbon dioxide, And a second gas cooler provided continuously to the first gas cooler discharge end for discharging the carbon dioxide to the collecting device side.

The apparatus may further include a bypass pipe for introducing a part of the discharged carbon dioxide branched into the gas discharge pipe of the regenerating cyclone as a regeneration gas into the regenerating reactor.

A fourth object of the present invention is to provide a method of operating a dry carbon dioxide capture system in which an exhaust gas is introduced into a first exhaust gas cooling unit together with water supplied from a water supply unit, is cooled by water supplied by a first heat exchange channel, The water being heated; Cooling the exhaust gas in the second exhaust gas cooling section; Cooling the flue-gas into the recovery reactor to absorb the carbon dioxide contained in the flue-gas; Withdrawing the recovered cyclone separating the gas and introducing the carbon dioxide-absorbed solid absorbent into the regeneration reactor; Separating the carbon dioxide of the solid absorbent that has absorbed the carbon dioxide in the regeneration reactor; The regenerating cyclone discharging the solid absorbent into the solid discharge pipe and discharging the carbon dioxide into the gas discharge pipe; The solid absorbent introduced into the first absorbent cooler is cooled by water supplied by the second heat exchange flow path, and the water is heated and vaporized; And a second absorbent cooler, wherein the solid absorbent is secondarily cooled and fed to the recovery reactor via a solid recycle line, wherein the carbon dioxide discharged into the gas discharge pipe of the regenerative cyclone flows into the gas cooler, The water vapor generated in the gas cooler and the first absorbent cooler is stored in the energy storage unit and the stored water vapor is supplied to the water supply unit The present invention is directed to a method of operating a dry carbon dioxide capture system capable of supplying water using energy generated in a process itself.

According to an embodiment of the present invention, water can be supplied by using the energy generated in the process itself, which can supply the necessary moisture to the recovery reactor using its own energy generated in the collection system.

According to one embodiment of the present invention, the water injection necessary for the recovery reactor for absorbing CO ₂ using the alkali-based solid absorbent is performed by supplying the energy of the combustion exhaust gas cooling unit and the high temperature gas discharged from the regeneration cyclone CO ₂ + H ₂ O) The energy that separates the high concentration of CO ₂ by condensing the H ₂ O stream and the absorbent cooler that cools the solid absorbent heated in the regeneration reactor to about 70 ° C. and feeds it to the recovery reactor is divided into two, It is possible to supply the necessary moisture to the recovery reactor by using the energy obtained by cooling the solid absorbent to about 100 ° C.

According to an embodiment of the present invention, additional water required for the recovery reactor is supplied from inside the system, so there is no additional energy consumption for economizing and efficient efficiency.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
1 is a configuration diagram of a conventional dry carbon dioxide capture system,
FIG. 2 is a configuration diagram of a dry carbon dioxide capture system capable of supplying water using energy generated in a process itself according to an embodiment of the present invention;
FIG. 3 is a flow chart of an exhaust gas flow according to an embodiment of the present invention, a method of operating a carbon dioxide capture system showing a solid absorbent flow,
FIG. 4 is a partial view of a dry carbon dioxide capture system showing an exhaust gas supply fan, a water supply unit, a first exhaust gas cooler, and a second exhaust gas cooler according to an embodiment of the present invention.
FIG. 5 is a partial block diagram of a dry carbon dioxide capture system showing a recovery reactor, a recovered cyclone, and a loop chamber side according to an embodiment of the present invention;
6 is a partial schematic view of a dry carbon dioxide capture system showing a regeneration reactor, a regeneration cyclone, a first sorbent cooler, and a second sorbent cooler side, according to one embodiment of the present invention;
FIG. 7 is a flowchart of a method of operating a carbon dioxide capture system showing a flow of carbon dioxide discharged from a regenerative cyclone according to an embodiment of the present invention;
FIG. 8 is a partial structural view of a dry carbon dioxide capture system showing a regeneration cyclone, a first gas cooler, a second substrate cooler, and a carbon dioxide capture device side according to an embodiment of the present invention;
9 is a partial structural view of a dry carbon dioxide capture system showing a water supply unit, a first exhaust gas cooling unit, a first gas cooler, a first absorbent cooler, and an energy storage unit side according to an embodiment of the present invention;
FIG. 10 is a flow chart of a method of operating a carbon dioxide capture system showing a production flow of supplied water according to an embodiment of the present invention;
11 is a block diagram illustrating a signal flow of a control unit according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Also in the figures, the thickness of the components is exaggerated for an effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional views and / or plan views that are ideal illustrations of the present invention. In the drawings, the thicknesses of the films and regions are exaggerated for an effective description of the technical content. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are produced according to the manufacturing process. For example, the area shown at right angles may be rounded or may have a shape with a certain curvature. Thus, the regions illustrated in the figures have attributes, and the shapes of the regions illustrated in the figures are intended to illustrate specific forms of regions of the elements and are not intended to limit the scope of the invention. Although the terms first, second, etc. have been used in various embodiments of the present disclosure to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons to explain the present invention.

Hereinafter, the construction and operation of a dry carbon dioxide capture system 100 capable of supplying water using energy generated in the process itself according to an embodiment of the present invention will be described. The configuration of the dry carbon dioxide capture system 100 according to an embodiment of the present invention will be described, and the flow of the exhaust gas and the solid absorbent, the flow of discharged carbon dioxide, the moisture supplied to the recovery reactor 40 As shown in FIG.

2 is a block diagram of a dry carbon dioxide capture system 100 capable of supplying water using energy generated in a process itself according to an embodiment of the present invention. FIG. 3 is a flow chart of an exhaust gas flow according to an embodiment of the present invention and a method of operating a carbon dioxide capture system 100 showing a solid absorbent flow.

2, a dry carbon dioxide capture system 100 capable of supplying water using energy generated in the process itself according to an embodiment of the present invention includes a flue gas supply fan, a first flue gas cooling unit 20, The second exhaust gas cooling unit 30, the recovery reactor 40, the recovery cyclone 50, the loop chamber 60, the regeneration reactor 70, the regeneration cyclone 73, the first absorbent cooler 80, 2 absorber cooler 90, a gas discharge pipe 74, a bypass pipe 75, a first gas cooler 110, a second gas cooler 120, an energy storage unit 130, and the like .

As will be described later, the dry carbon dioxide capture system 100 capable of supplying water using the energy generated in the process itself according to an embodiment of the present invention is capable of collecting the energy generated in the first exhaust gas cooler 20, The energy generated in the first gas cooler 110 into which the gas (CO ₂ + H ₂ O) discharged through the regenerating reactor 70 and the regenerating cyclone 73 flows and the energy generated in the lower portion of the regenerating reactor 70 and the regeneration The required amount of moisture is produced and supplied to the recovery reactor 40 by using energy generated in the first absorbent cooler 80 into which the solid absorbent discharged from the cyclone 73 flows.

4 is a partial structural view of a dry carbon dioxide capture system 100 showing an exhaust gas supply fan, a first exhaust gas cooler 20, and a second exhaust gas cooler 30 according to an embodiment of the present invention . As shown in FIGS. 2, 3 and 4, first, the combustion exhaust gas flows through the exhaust gas supply fan, and the combustion exhaust gas is supplied with saturated steam by the moisture required for the recovery reactor 40. The combustion exhaust gas supplied with such moisture is first cooled through the first exhaust gas cooling unit 20 (S1). The water stored in the first water tank 21 is supplied by the first water pump 22 through the first heat exchange channel 23 which is a separate line in the first exhaust gas cooling unit 20, As the heat exchanges, the flue gas is cooled and the water is heated (S2).

The exhaust gas discharged from the first exhaust gas cooling unit 20 is secondarily cooled while passing through the second exhaust gas cooling unit 30 (S3). The exhaust gas is also cooled by heat exchange with the cooling medium flowing through the cooling passage 31 which is a separate line in the second exhaust gas cooling section 30.

FIG. 5 is a partial block diagram of a dry carbon dioxide capture system 100 showing a collection reactor 40, a recovery cyclone 50, and a loop chamber 60 side according to an embodiment of the present invention. 2, 3 and 5, the cooled flue-gas flows into the lower end of the recovery reactor 40 (S4), and the alkali-based solid sorbent present in the recovery reactor 40 is withdrawn from the incoming flue- Thereby absorbing carbon dioxide (S5). In addition, since the reaction in the recovery reactor 40 is an exothermic reaction, it is possible to provide a separate reactor cooling channel 41 so that the cooling and the temperature can be controlled.

The solid absorbent (solid) absorbing the carbon dioxide produced by the reaction in the recovery reactor 40 and the gas are discharged together to the upper end, and the discharged solid and gas are separated through the recovery cyclone 50. The gas separated from the recovered cyclone 50 is discharged to the upper side, and the solid absorbent absorbing the carbon dioxide is introduced into the regeneration reactor 70 through the loop chamber 60 (S6).

Figure 6 is a schematic view of a dry carbon dioxide capture system 100 showing a regeneration reactor 70, a regeneration cyclone 73, a first sorbent cooler 80, and a second sorbent cooler 90 side, according to one embodiment of the present invention. Fig. As shown in FIGS. 2, 3 and 6, the carbon dioxide and the solid absorbent are separated again from the solid absorbent absorbing the carbon dioxide in the regeneration reactor 70. That is, the reverse reaction in the recovery reactor 40 proceeds. The gas (CO ₂ + H ₂ O) and the solid (solid absorbent) discharged from the regeneration reactor 70 are discharged and separated from the solid and the gas through the regenerating cyclone 73 (S 7). Gas, CO ₂ and H ₂ O is discharged to the upper side, the regenerated solid sorbent is discharged to the bottom of the regeneration reactor 70, the lower and reproducing the cyclone 73 is to be the inlet side of the first absorbent cooler (80) (S8) .

The solid absorbent is cooled through the first absorbent cooler (80). At this time, the water stored in the first water tank 21 through the second heat exchange channel 83 is absorbed by the first absorbent cooler 80 through the second water pump 82 to absorb the heat of the solid absorbent And is vaporized (S9).

The solid absorbent that has been firstly cooled in the first absorbent cooler 80 is secondarily cooled through the second absorbent cooler 90 continuously through the solid discharge pipe 84 (S10). In the second absorbent cooler 90, the solid absorbent is cooled through the air-cooling line 91, which is a separate line. Then, the recovered water is supplied to the recovery reactor 40 through the solid recycle pipe 42 provided between the second absorbent cooler 90 and the recovery reactor 40 (S11).

FIG. 7 is a flowchart illustrating a method of operating a carbon dioxide capture system 100 showing a flow of carbon dioxide discharged from a regeneration cyclone 73 according to an embodiment of the present invention. 8 is a schematic diagram of a dry carbon dioxide capture system (shown in FIG. 8) that shows the regeneration cyclone 73, the first gas cooler 110, the second gas cooler 120, and the carbon dioxide capture device 200 side according to an embodiment of the present invention. 100 shown in FIG.

2, 7, and 8, a part of CO ₂ and H ₂ O discharged through the gas discharge pipe 74 of the above-mentioned regeneration cyclone 73 is used as a regeneration gas of the regeneration reactor 70 (S100). That is, the bypass pipe 75 is connected to the regeneration gas supply pipe 71 of the regeneration reactor 70, and a part of CO ₂ and H ₂ O discharged through the gas exhaust pipe 74 of the regeneration cyclone 73 is supplied to the regeneration reactor (70). The bypass pipe 75 and the regeneration gas supply pipe 72 are provided at one side of the regeneration gas supply pipe 71 so that CO ₂ and H ₂ O supplied to the regeneration reactor 70, So that the flow rate of the fluid can be adjusted.

The remaining CO ₂ and H ₂ O are introduced into the first gas cooler 110 (S200). In this first gas cooler 110, the gas is cooled while exchanging heat with the water flowing through the third heat exchange channel 111, and the water flowing through the third heat exchange channel 111 is vaporized. As will be described later, the third heat exchange passage 111 is connected to the first heat exchange passage 23 of the first exhaust gas cooling section 20, The heated water is reheated in the first gas cooler 110 to be vaporized (S300).

The carbon dioxide discharged from the first gas cooler 110 is cooled again by the second gas cooler 120 (S400), is introduced into the collecting apparatus 200 side, and water is removed and liquefied (S500).

Hereinafter, a configuration and a method for producing and supplying moisture using energy generated in the system 100 according to an embodiment of the present invention will be described again.

9 is a schematic diagram of a dry carbon dioxide capture system 100 showing a first exhaust gas cooler 20, a first gas cooler 110, a first sorbent cooler 80, and an energy storage 130 side, according to an embodiment of the present invention. (100) according to an embodiment of the present invention. FIG. 10 is a flowchart illustrating a method of operating the carbon dioxide capture system 100 according to an embodiment of the present invention. Referring to FIG. 11 is a block diagram showing a signal flow of the control unit 300 according to an embodiment of the present invention.

9 and 10, water is introduced into the first exhaust gas cooling section 20 in the first water tank 21 of the first heat exchange channel 23 (S21), and the first exhaust gas cooling section Exchanged with the exhaust gas to be introduced into the recovery reactor 40 at step S22 (S22). At this time, the exhaust gas is cooled and the water in the first heat exchange flow path 23 is heated. For example, water at room temperature is heated to about 72 ° C. The control unit 300 may control the first water pump 22 provided at one side of the first heat exchange channel 23 to adjust the flow rate of water flowing into the first exhaust gas cooling unit 20.

The first heat exchange channel 23 and the third heat exchange channel 111 are connected to each other so that the water heated by the first exhaust gas cooling unit 20 is heated and vaporized through the first gas cooler 110 (S23). That is, in the first gas cooler 110, heat is exchanged with carbon dioxide and water vapor discharged from the regeneration cyclone, and the water is heated and vaporized, and the carbon dioxide is cooled and the water vapor is condensed (liquefied). At this time, for example, water is discharged at a steam of about 132 ° C, and the carbon dioxide is cooled to about 100 ° C.

On the other hand, in the second heat exchange passage 83, the water in the second water tank 81 flows into the first absorbent cooler 80 side by the driving of the second water pump 82 (S31) and is heated and vaporized . That is, in the first absorbent cooler 80, the solid absorbent discharged to the lower side of the regenerating cyclone and the water in the second heat exchange path 83 are heat-exchanged with each other, so that the solid absorbent is cooled and the water is heated and vaporized S32). For example, the solid absorbent is cooled from about 180 ° C to about 100 ° C, and the water is heated to about 170 ° C. At this time, the controller 300 controls the second water pump 82 to adjust the flow rate of water flowing into the first absorbent cooler 80.

The steam heated while passing through S21, S22 and S23 and the main steam heated while passing through S31 and S32 are simultaneously introduced into the energy storage unit 130 (S40). The produced moisture is supplied to the water supply line 11, , And supplies the necessary moisture to the recovery reactor 40 by means of (S50). In addition, the temperature sensor 310 may measure the temperature in real time, and if necessary, the controller 300 may drive the steam generator 131 provided in the energy storage unit 130 to supply necessary heat.

The steam supply pump 132 and the control valve 12 may be provided at one side of the water supply line 11 to control the flow rate of water supplied through the control of the controller 300.

It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

1: Conventional dry carbon dioxide capture system
2: Flue gas supply fan
3: Absorbent cooler
10:
11: water supply line
12: Regulating valve
20: First exhaust gas cooling section
21: First water tank
22: First water pump
23: first heat exchange channel
30: second exhaust gas cooling section
31:
40: recovery reactor
41: reactor cooling flow path
42: Solid recycle tube
50: Recovery Cyclone
60: loop room
70: regeneration reactor
71: regeneration gas supply pipe
72: Regeneration gas supply fan
73: Regenerative cyclone
74: gas discharge pipe
75: bypass pipe
80: First absorbent cooler
81: Second water tank
82: Second water pump
83: Second heat exchange channel
84: Solid discharge pipe
90: Second absorbent cooler
91:
100: A dry carbon dioxide capture system capable of supplying water using energy generated from the process itself
110: first gas cooler
111: third heat exchange channel
120: Secondary gas cooler
130: Energy storage unit
131: Steam generator
132: Steam supply pump
200: collecting device
300:
310: Temperature sensor

Claims (17)

An apparatus for supplying water into a recovery reactor of a dry carbon dioxide capture system,
An exhaust gas cooling unit for cooling the exhaust gas to be introduced into the recovery reactor;
A first heat exchange passage through which the exhaust gas flows into the exhaust gas cooling section through a separate line to absorb the heat of the exhaust gas to heat the water;
An energy storage unit for storing moisture produced in the first heat exchange passage;
A water supply unit for supplying water stored in the energy storage unit to the recovery reactor;
An absorber cooler for cooling the solid absorbent separated and discharged by the regeneration reactor and the regeneration cyclone; And
And a second heat exchange passage through which the water is heated by absorbing the heat of the absorbent introduced into the absorbent cooler through a separate line,
And water produced in the second heat exchange passage is stored in the energy storage unit.
delete The method according to claim 1,
A gas cooler for cooling the carbon dioxide separated and discharged from the regeneration reactor of the dry carbon dioxide capture system;
And a third heat exchange channel connected to the first heat exchange channel and heated by absorbing the heat of the carbon dioxide introduced into the gas cooler by the moisture heated in the first heat exchange channel,
Wherein the energy storage unit stores water produced in the third heat exchange channel.
The method of claim 3,
A first water pump provided at one side of the first heat exchange channel for pumping the water stored in the first water tank to the exhaust gas cooling unit side,
And a second water pump provided at one side of the second heat exchange channel for pumping the water stored in the second water tank to the absorbent cooler side.
5. The method of claim 4,
Further comprising a control unit for controlling the first water pump to control a flow rate of water flowing into the exhaust gas cooling unit side and a second water pump to control a flow rate of water flowing into the absorbent cooler unit Water supply device using energy generated in the collection system.
6. The method of claim 5,
A steam generator provided at one side of the energy storage unit for heating the stored moisture; and a water supply unit provided at one side of the water supply line provided between the energy storage unit and the water supply unit, for pumping moisture stored in the energy storage unit to the water supply unit Wherein the steam supply pump further comprises a steam supply pump for supplying steam to the steam generator.
The method according to claim 6,
Further comprising a temperature sensor for measuring the temperature of the moisture stored in the energy storage unit,
Wherein the control unit controls the driving of the first water pump, the second water pump, the steam generator, and the steam supply pump based on the value measured by the temperature sensor. Used water supply device.
A method for supplying moisture into a recovery reactor of a dry carbon dioxide capture system,
The exhaust gas to be introduced into the recovery reactor flows into the exhaust gas cooling unit, water is introduced into the exhaust gas cooling unit through the first heat exchange flow path, which is a separate line, and the water is heated by absorbing the heat of the exhaust gas;
The carbon dioxide discharged from the regeneration reactor of the dry carbon dioxide capture system flows into the gas cooler and the water heated in the first heat exchange channel flows into the gas cooler through the third heat exchange channel connected to the first heat exchange channel, Absorbing the heat of carbon dioxide and heating it;
Storing water produced in the third heat exchange passage in an energy storage unit; And
And supplying moisture stored in the energy storage unit to the recovery reactor through a water supply unit,
The solid absorbents separated and discharged by the regenerating reactor and the regenerating cyclone are introduced into the absorbent cooler and water is absorbed into the absorbent cooler through the second heat exchange channel which is a separate line to absorb the heat of the absorbent, And water produced in the second heat exchange passage is stored in the energy storage unit.
delete [Claim 10 is abandoned upon payment of the registration fee.] 9. The method of claim 8,
Wherein the temperature sensor measures the temperature of the water stored in the energy storage unit.
11. The method of claim 10,
A steam generator provided at one side of the energy storage unit for heating the stored moisture; and a water supply unit provided at one side of the water supply line provided between the energy storage unit and the water supply unit, for pumping moisture stored in the energy storage unit to the water supply unit A steam supply pump,
The control unit controls the first water pump provided in the first heat exchange passage based on the value measured by the temperature sensor to adjust the flow rate of water flowing into the exhaust gas cooling unit, Wherein the control unit controls the flow rate of water flowing into the absorbent cooler, and controls the operation of the steam generator and the steam supply pump.
In a dry carbon dioxide capture system,
A water supply device according to any one of claims 1 and 3 to 7;
A recovery reactor for introducing the exhaust gas cooled by the exhaust gas cooling unit of the water supply device and contacting the solid absorbent to the exhaust gas to recover carbon dioxide in the exhaust gas;
A recovery cyclone for separating the gas discharged from the recovery reactor and the solid absorbent absorbing carbon dioxide;
A regenerating reactor in which the solid absorbent absorbing the carbon dioxide separated from the recovered cyclone enters and reacts with the regeneration gas to separate the carbon dioxide;
A regenerative cyclone separating and discharging the carbon dioxide discharged from the regeneration reactor and the solid absorbent;
An absorber cooler in which a solid absorbent discharged from the regeneration reactor and the regeneration cyclone flows and is cooled; And
And a solid recycle tube provided between the absorbent cooler and the recovery reactor to allow the cooled solid absorbent to flow into the recovery reactor,
The water is heated through the exhaust gas cooling unit through the first heat exchange channel and then continuously flows into the gas cooler connected to the gas discharge pipe of the regenerating cyclone through the third heat exchange channel and heated, Heated by the absorbent cooler, the heated moisture is stored in the energy storage,
Wherein the water supply unit of the water supply device connected to the energy storage unit supplies water to the flue gas introduced into the flue gas cooling unit. The dry carbon dioxide capture system is capable of supplying water using energy generated in the process itself.
13. The method of claim 12,
The exhaust gas cooling unit includes:
A first exhaust gas cooler for heating the water and cooling the exhaust gas by exchanging heat between the exhaust gas supplied with moisture by the water supply unit and the water introduced by the first heat exchange path; And a second exhaust gas cooling unit continuously provided for cooling the exhaust gas, wherein the second exhaust gas cooling unit is capable of supplying water using energy generated in the process itself.
14. The method of claim 13,
The absorbent cooler comprises:
A first absorbent cooler for heat-exchanging heat between the solid absorbent supplied through the regenerating reactor and the solid discharge pipe of the regenerating cyclone and the water introduced by the second heat exchange channel to cool the exhaust gas by heating the water; And a second absorber cooler continuously provided at an absorber cooler discharge end to cool the solid absorbent, wherein the moisture absorbent is capable of supplying water using energy generated in the process itself.
15. The method of claim 14,
The gas cooler includes:
A first gas cooler for exchanging heat between the carbon dioxide supplied through the gas discharge pipe of the regenerating cyclone and the water introduced by the third heat exchanging passage to evaporate the water and cool the carbon dioxide; And a second gas cooler that is continuously provided to cool the carbon dioxide and discharge the carbon dioxide to the collecting device. The dry carbon dioxide collecting system according to claim 1,
16. The method of claim 15,
And a bypass pipe for introducing a part of the carbon dioxide branched and discharged to the gas discharge pipe of the regenerating cyclone as a regeneration gas into the regenerating reactor side. Collection system.
A method of operating a dry carbon dioxide capture system according to claim 12,
The flue gas is introduced into the first flue gas cooling portion together with the water supplied from the water supply portion, cooled by the water supplied by the first heat exchange flow path, and the water is heated;
Cooling the exhaust gas in the second exhaust gas cooling section;
Cooling the flue-gas into the recovery reactor to absorb the carbon dioxide contained in the flue-gas;
Withdrawing the recovered cyclone separating the gas and introducing the carbon dioxide-absorbed solid absorbent into the regeneration reactor;
Separating the carbon dioxide of the solid absorbent that has absorbed the carbon dioxide in the regeneration reactor;
The regenerating cyclone discharging the solid absorbent into the solid discharge pipe and discharging the carbon dioxide into the gas discharge pipe;
The solid absorbent introduced into the first absorbent cooler is cooled by water supplied by the second heat exchange flow path, and the water is heated and vaporized; And
In a second absorbent cooler, the solid absorbent is secondarily cooled and fed to the recovery reactor via a solid recycle line,
The carbon dioxide discharged into the gas discharge pipe of the regenerating cyclone is introduced into the gas cooler and is cooled by the moisture supplied through the third heat exchange channel connected to the first heat exchange flow path, the water is vaporized, and the gas cooler and the first Wherein the water vapor produced in the absorber cooler is stored in an energy storage unit, and the stored water vapor is supplied to the water supply unit, wherein the water vapor can be supplied using energy generated in the process itself.

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