KR102264810B1 - Continuous moving­bed CO2 capture system with vaccum desorption - Google Patents

Abstract

The present invention relates to a reduced pressure desorption reactor and a continuous moving bed CO2 capture system and a collection method including the reduced pressure desorption reactor, and more particularly, to a reduced pressure desorption for reacting a desorption reactor applied to a carbon dioxide capture system under reduced pressure conditions. A reaction apparatus comprising: a desorption reactor for introducing an adsorbent that has absorbed carbon dioxide, desorbing the carbon dioxide in the adsorbent under reduced pressure, and discharging the regenerated absorbent; a first lock hopper installed at the front of the desorption reactor, decompressed when the adsorption absorbent flows in, and then introducing the adsorption absorbent into the desorption reactor; and a second lock hopper installed at the rear end of the desorption reactor, pressurized to normal pressure when the regenerated absorbent is introduced, and then discharged.

Description

A vacuum desorption reactor and a continuous moving bed CO2 capture system and method having the reduced pressure desorption reactor {Continuous movingbed CO2 capture system with vacuum desorption}

The present invention relates to a reduced pressure desorption reactor and a continuous moving bed CO2 capture system and method including the reduced pressure desorption reactor.

Conventionally, a wet method was used as a CO2 recovery process. That is, a gas containing CO2 is passed through an amine-based solution to absorb CO2, and the solution is regenerated and used in a regeneration tower. This wet method has a disadvantage in that wastewater is additionally generated during the process.

Therefore, as an alternative to solve the disadvantages of the wet method, a method for recovering CO2 by a dry method has been proposed.

1 shows the configuration of a conventional dry CO2 capture system (1). 1, the system using the dry method recovers CO2 using two reactors, and the CO2 supplied to the recovery reactor (adsorption reactor) 10 is adsorbed and removed by the solid absorbent (dry absorbent) , through the first adsorption cyclone 14, the solid absorbent is introduced into the desorption reactor 40 to remove the adsorbed CO2, and H2O is absorbed into the solid absorbent in the pretreatment reactor and supplied to the adsorption reactor 10 again. is made of

At this time, in the desorption reactor 40, a separate heat source must be provided to remove carbon dioxide. In addition, in the pretreatment reactor, heat must be removed from the solid absorbent to provide a suitable temperature condition for the adsorption of carbon dioxide in the adsorption reactor.

In the prior art, since the dry carbon dioxide capture device 1 is mainly used in a large plant that generates a large amount of carbon dioxide such as a power plant, the medium for supplying heat uses steam obtained from the power plant, and the medium for cooling is generally We use readily available water.

However, not only the amount of heat required for the dry carbon dioxide capture device is considerable, but also if the water that has risen in temperature is discharged after cooling in a large-capacity plant facility, it will adversely affect aquatic organisms due to thermal contamination under the influence of hot wastewater.

Republic of Korea Patent Publication 10-2012-0117097 Republic of Korea Patent Registration 10-1956927 Republic of Korea Patent Registration 10-1751721

Therefore, the present invention has been devised to solve the conventional problems as described above. According to an embodiment of the present invention, the desorption reactor (regeneration reactor) is operated under reduced pressure conditions instead of atmospheric pressure, thereby reducing overall energy consumption. It is an object of the present invention to provide a continuous moving bed CO2 capture system and a collection method including a reduced pressure desorption reactor and the reduced pressure desorption reactor capable of increasing energy efficiency, desorption and regeneration efficiency.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

A first object of the present invention is a reduced pressure desorption reaction apparatus for reacting a desorption reactor applied to a carbon dioxide capture system under reduced pressure conditions, wherein an adsorbent adsorbing carbon dioxide is introduced and the carbon dioxide in the adsorption absorbent is removed under reduced pressure conditions. a desorption reactor for desorbing and discharging the regenerated regenerated absorbent; a first lock hopper installed at the front of the desorption reactor, decompressed when the adsorption absorbent flows in, and then introducing the adsorption absorbent into the desorption reactor; and a second lock hopper installed at the rear end of the desorption reactor, pressurized to normal pressure when the regenerated absorbent is introduced, and then discharged.

and an atmospheric pressure chamber for a first buffer provided at the front end of the first lock hopper, in which the adsorption absorbent is introduced to maintain a predetermined water level range; a first valve provided at the front end of the atmospheric pressure chamber for the first buffer and a second valve provided at the rear end; a first water level sensor for measuring the level of the atmospheric pressure chamber for the first buffer; and a control unit for controlling the opening and closing of the first valve and the second valve based on the value measured by the first water level sensor so that the water level value of the atmospheric pressure chamber for the first buffer is maintained within a predetermined water level range. can do.

In addition, it is provided at the rear end of the first lock hopper, the decompression chamber for the first buffer in which the decompressed adsorption absorbent is introduced to maintain a predetermined water level range; a third valve provided at the front end of the decompression chamber for the first buffer and a fourth valve provided at the rear end; and a second water level sensor for measuring the water level of the pressure reducing chamber for the first buffer, wherein the control unit controls the opening and closing of the third valve and the fourth valve based on the value measured by the second water level sensor. It may be characterized in that the water level value of the decompression chamber for the first buffer is maintained within a predetermined water level range.

And after the second valve is opened and the adsorbent flows into the first lock hopper, the second and third valves are closed, and the pressure reducing pump is driven to form the inside of the first lock hopper in a reduced pressure state. Then, the third valve is opened to introduce the adsorbent into the pressure reducing chamber for the first buffer.

In addition, a pressure reduction chamber for a second buffer is provided at the front end of the second lock hopper, the regenerated absorbent is introduced to maintain a predetermined water level range; a fifth valve provided at a rear end of the decompression chamber for the second buffer; and a third water level sensor for measuring the water level of the pressure reducing chamber for the second buffer, wherein a control unit controls the opening and closing of the fifth valve based on the value measured by the third water level sensor to control the opening and closing of the fifth valve for the second buffer It may be characterized in that the control so that the water level value of is maintained within a predetermined water level range.

and an atmospheric pressure chamber for a second buffer provided at the rear end of the second lock hopper and maintaining a predetermined water level range by introducing the regenerated absorbent at atmospheric pressure; a sixth valve provided at the front end of the atmospheric pressure chamber for the second buffer and a seventh valve provided at the rear end; and a fourth water level sensor for measuring the water level of the atmospheric pressure chamber for the second buffer, wherein the control unit controls the opening and closing of the sixth valve and the seventh valve based on the value measured by the fourth water level sensor. It may be characterized in that the water level value of the atmospheric pressure chamber for the second buffer is maintained within a predetermined water level range.

In addition, after the fifth valve is opened and the regenerated absorbent flows into the second lock hopper, the fifth and sixth valves are closed, and the pressure pump is driven to form the inside of the second lock hopper at normal pressure. Thereafter, the sixth valve is opened to introduce the regenerated absorbent into the atmospheric pressure chamber for the second buffer.

and a first flow rate control unit provided between the decompression chamber for the first buffer and the desorption reactor to adjust the flow rate of the adsorbent introduced into the desorption reactor; a second flow rate control unit provided between the desorption reactor and the reduced pressure chamber for the second buffer to adjust the flow rate of the regenerated absorbent discharged from the desorption reactor; and a third flow rate control unit provided at the rear end of the atmospheric pressure chamber for the second buffer to adjust the flow rate of the regenerated absorbent introduced into the absorption reactor. It may be characterized by including at least any one of.

In addition, it may be characterized in that it further comprises; a regeneration cyclone connected to the discharge end provided on one side of the upper end of the desorption reactor to separate gas and solid.

A second object of the present invention is to provide a method for reacting a desorption reactor applied to a carbon dioxide capture system under reduced pressure, comprising: a first step of introducing an adsorbent into a first lock hopper installed in front of the desorption reactor; a second step of depressurizing the adsorbent introduced into the first lock hopper by a pressure reducing pump; a third step in which the adsorbent is introduced into the desorption reactor in a reduced pressure state, the carbon dioxide in the adsorption absorbent is desorbed under reduced pressure, and the regenerated absorbent is discharged through a discharge stage; a fourth step of introducing the regenerated absorbent into a second lock hopper installed at the rear end of the desorption reactor; and a fifth step of pressurizing the regenerated absorbent introduced into the second lock hopper to normal pressure by a pressurization pump.

And in the first and second steps, the atmospheric pressure chamber for the first buffer installed at the front end of the first lock hopper maintains a predetermined water level range by the first valve and the second valve, and the adsorbent absorbs the first lock. It can be characterized in that the adsorption absorbent is introduced into the desorption reactor while flowing into the hopper and maintaining a predetermined water level range by the third and fourth valves in the pressure reducing chamber for the first buffer installed at the rear end of the first lock hopper. have.

Also, in the fourth and fifth steps, the atmospheric pressure chamber for the first buffer installed at the front end of the first lock hopper maintains a predetermined water level range by the first valve and the second valve, and the adsorbent absorbs the first lock. It can be characterized in that the adsorption absorbent is introduced into the desorption reactor while flowing into the hopper and maintaining a predetermined water level range by the third and fourth valves in the pressure reducing chamber for the first buffer installed at the rear end of the first lock hopper. have.

A third object of the present invention is to provide a CO2 collection system, comprising: an adsorption reactor in which a regenerated absorbent is introduced and the regenerated absorbent adsorbs carbon dioxide and discharges the adsorbed absorbent under atmospheric pressure; and a reduced pressure desorption reaction device according to the first object described above, in which the adsorption absorbent discharged from the adsorption reactor is introduced, and the adsorption absorbent is regenerated under reduced pressure conditions and introduced into the adsorption reactor. It can be achieved as a continuous moving bed CO2 capture system with a reactor.

And a first adsorption cyclone provided between the adsorption reactor and the reduced pressure desorption reaction device to separate the gas and solid in the fluid discharged from the adsorption reactor, and to introduce a solid adsorption absorbent to the reduced pressure desorption reaction device side; It may be characterized by including.

In addition, the second adsorption cyclone is connected to the discharge end provided on one side of the upper end of the adsorption reactor to separate gas and solid; may be characterized in that it further comprises.

And it is provided on one side of the rear end of the adsorption reactor, the flow rate control means for controlling the flow rate of the adsorbed adsorbent discharged; may be characterized in that it further comprises.

According to the continuous moving bed CO2 collection system and collection method including the reduced pressure desorption reactor and the reduced pressure desorption reactor according to an embodiment of the present invention, the desorption reactor (regeneration reactor) is operated under reduced pressure conditions instead of atmospheric pressure, so that the overall It has the effect of increasing energy efficiency, desorption, and regeneration efficiency.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

The following drawings attached to this specification illustrate a preferred embodiment of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in those drawings It should not be construed as being limited.
1 is a block diagram of a conventional dry CO2 capture system;
2 is a block diagram of a continuous moving bed CO2 capture system having a reduced pressure desorption reactor according to an embodiment of the present invention;
3a to 3d are configuration diagrams showing the operating state of the first lock hopper part side according to an embodiment of the present invention;
4a to 4d are block diagrams showing the operating state of the second lock hopper part side according to an embodiment of the present invention;
5 is a block diagram illustrating a signal flow of a control unit according to an embodiment of the present invention.

The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

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

Embodiments described herein will be described with reference to cross-sectional and/or plan views, which are ideal illustrative views of the present invention. In the drawings, thicknesses of films and regions are exaggerated for effective description of technical content. Accordingly, the shape of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. Accordingly, embodiments of the present invention are not limited to the specific form shown, but also include changes in the form generated according to the manufacturing process. For example, the region shown at right angles may be rounded or have a predetermined curvature. Accordingly, the regions illustrated in the drawings have properties, and the shapes of the regions illustrated in the drawings are intended to illustrate a particular shape of the region of the device and not to limit the scope of the invention. In various embodiments of the present specification, terms such as first, second, etc. are used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the terms 'comprises' and/or 'comprising' do not exclude the presence or addition of one or more other components.

In describing the specific embodiments below, various specific contents have been prepared to more specifically describe the invention and help understanding. However, a reader having enough knowledge in this field to understand the present invention may recognize that it may be used without these various specific details. In some cases, it is mentioned in advance that parts that are commonly known and not largely related to the invention are not described in order to avoid confusion without any reason in describing the present invention in describing the invention.

Hereinafter, the configuration and function of a continuous moving bed CO2 capture system having a reduced pressure desorption reactor according to an embodiment of the present invention will be described. First, FIG. 2 shows the configuration of a continuous moving bed CO2 capture system having a reduced pressure desorption reactor according to an embodiment of the present invention.

As shown in FIG. 2, in the continuous moving bed CO2 capture system 100 having a reduced pressure desorption reactor according to an embodiment of the present invention, the regenerated absorbent is introduced and the regenerated absorbent adsorbs carbon dioxide and adsorbs it under atmospheric pressure conditions. It can be seen that it is configured to include an adsorption reactor 10 for discharging the adsorbed adsorbent.

And in the continuous moving bed CO2 capture system 100 having a reduced pressure desorption reactor according to an embodiment of the present invention, the adsorbent discharged from the adsorption reactor 10 is introduced, and the adsorption absorbent is regenerated under reduced pressure to be converted into an adsorption reactor. It is configured to include a reduced pressure desorption reaction device 110 to introduce.

In addition, it is provided between the adsorption reactor 10 and the reduced pressure desorption reactor 110 to separate the gas and the solid in the fluid discharged from the adsorption reactor 10, and the solid adsorbent is introduced into the reduced pressure desorption reactor 110 side. It includes a first adsorption cyclone (30). The first adsorption cyclone 30 includes a solid discharge end 32 and a gas discharge end 31 , and the reduced pressure desorption reactor 110 is connected to the solid discharge end 32 .

And, as shown in FIG. 2 , it can be seen that the adsorption reactor 10 includes a second adsorption cyclone 14 connected to the discharge end 11 provided at the upper end side to separate gas and solid.

In addition, it is connected to the discharging end 13 at the rear end of the adsorption reactor, it includes a flow control means 13 for controlling the flow rate of the adsorbent discharged, and is connected to the first adsorption cyclone 30 through the transfer pipe 20 . become

Hereinafter, the configuration and function of the reduced pressure desorption reactor according to an embodiment of the present invention will be described in more detail.

First, FIGS. 3A to 3D are diagrams showing the operating state of the first lock hopper unit according to an embodiment of the present invention. And Figure 4a to Figure 4d is a block diagram showing the operating state of the second lock hopper according to an embodiment of the present invention. 5 is a block diagram illustrating a signal flow of a control unit according to an embodiment of the present invention.

A reduced pressure desorption reactor according to an embodiment of the present invention is for reacting a desorption reactor applied to a carbon dioxide capture system under reduced pressure conditions.

As a whole, as shown in FIG. 2, the reduced pressure desorption reaction apparatus according to an embodiment of the present invention has an adsorbent adsorbing carbon dioxide introduced therein to desorb carbon dioxide in the adsorption absorbent under reduced pressure conditions and discharging the regenerated regenerated absorbent. It is installed in the desorption reactor 40, the front end of the desorption reactor, and when the adsorption absorbent is introduced, the pressure is reduced, and then the first lock hopper 60 that introduces the adsorption absorbent into the desorption reactor 40. When the regenerated absorbent is introduced, it is configured to include a second lock hopper 80 that is pressurized to normal pressure and then discharged.

In addition, as shown in FIGS. 1 and 3A to 3D , in the reduced pressure desorption reaction apparatus 110 according to an embodiment of the present invention, an atmospheric chamber 50 for a first buffer is provided at the front end of the first lock hopper 60 . It is provided, and the adsorption absorbent is introduced into the atmospheric pressure chamber 50 for the first buffer to maintain a predetermined water level range.

And the first valve 111 is provided at the front end of the atmospheric pressure chamber 50 for the first buffer, and the second valve 112 is provided at the rear end. In addition, the first water level sensor 51 is configured to measure the water level of the atmospheric pressure chamber for the first buffer. Therefore, as shown in FIG. 5 , the control unit 140 controls the opening and closing of the first valve 111 and the second valve 112 based on the value measured by the first water level sensor 51 for the first buffer. It is controlled so that the water level value of the atmospheric chamber 50 is maintained within a predetermined water level range.

In addition, as shown in FIGS. 1 and 3A to 3D , the reduced pressure desorption reaction device 110 according to an embodiment of the present invention is provided at the rear end of the first lock hopper 60, and the decompressed adsorption absorbent is introduced. A first decompression chamber 52 for a buffer in which a predetermined water level is maintained, a third valve 113 provided at the front end of the first buffer decompression chamber 52, and a fourth valve 114 provided at the rear end, And it can be seen that it is configured to include a second water level sensor 53 for measuring the water level of the first buffer decompression chamber 52 .

Therefore, the control unit controls the opening and closing of the third valve 113 and the fourth valve 114 based on the value measured by the second water level sensor 54 so that the water level of the first buffer decompression chamber 52 is at a constant level. control to remain within range.

That is, after the second valve 112 is opened and the adsorbent flows into the first lock hopper 60 , the second valve 112 and the third valve 113 are closed, and the pressure reducing pump 61 is driven Thus, after forming the inside of the first lock hopper 60 in a reduced pressure state, the third valve 113 is opened to introduce the adsorbent into the pressure reducing chamber 52 for the first buffer. During the decompression process, the first pressure sensor 62 measures the internal pressure of the first lock hopper 60 in real time, and the controller 140 controls the operation of the pressure reducing pump 61 to control the internal pressure of the first lock hopper 60 . It is controlled so that the pressure is reduced by the set pressure.

At this time, the atmospheric pressure chamber 50 for the first buffer installed at the front end of the first lock hopper 60 maintains a certain water level range by the opening/closing control of the first valve 111 and the second valve 112, and the adsorption absorbent is released. It flows into the one-lock hopper 60, and the pressure-reducing chamber 52 for the first buffer installed at the rear end of the first lock hopper 60 is constant by the opening/closing control of the third valve 113 and the fourth valve 114. While the water level range is maintained, the adsorbent is introduced into the desorption reactor 40 . That is, the first valve and the fourth valve are always opened in the entire process of the decompression process, and thus the pressure reduction process is continuously performed.

As shown in FIG. 3A , in a state in which the first valve 11 is opened and the adsorbent is introduced into the atmospheric pressure chamber 50 for the first buffer, the water level of the atmospheric pressure chamber 50 for the first buffer increases, and the second 1 lock hopper 60 waits for the decompressed adsorbent in a state in which the third valve 113 is closed. And the absorbent in the decompression chamber for the first buffer is introduced into the desorption reactor (40). And as shown in FIG. 3b, when the water level of the atmospheric pressure chamber 50 for the first buffer is above a specific water level, the second valve 112 is opened to introduce the adsorbent into the first lock hopper 60, and the second The decompressed adsorbent in the decompression chamber 52 for the buffer continues to flow into the desorption reactor 40 . And as shown in FIG. 3c, the adsorbent is introduced into the atmospheric pressure chamber for the first buffer in the process of closing the second valve 112 and the third valve 113 and driving the pressure reducing pump to reduce the pressure, The adsorbent in the pressure reducing chamber for the first buffer is introduced into the desorption reactor (40). And, as shown in FIG. 3D, the adsorbent decompressed by opening the third valve is introduced into the decompression chamber for the first buffer.

The process of Fig. 3a → Fig. 3b → Fig. 3c → Fig. 3d → Fig. 3a proceeds continuously.

And as shown in FIGS. 2 and 4A to 4D , the reduced pressure desorption reaction device 110 according to the embodiment of the present invention is provided at the front end of the second lock hopper 80, and the regenerated absorbent is introduced to a predetermined water level. Measure the water level of the second buffer decompression chamber 70 in which the range is maintained, the fifth valve 115 provided at the rear end of the second buffer decompression chamber 70, and the second buffer decompression chamber 70 It can be seen that the third water level sensor 71 is included. Therefore, the control unit controls the opening and closing of the fifth valve 115 based on the value measured by the third water level sensor 71 so that the water level value of the pressure reducing chamber 70 for the second buffer is maintained within a predetermined water level range. do.

In addition, as shown in FIGS. 2 and 4A to 4D , the reduced pressure desorption reaction device 110 according to an embodiment of the present invention is provided at the rear end of the second lock hopper 80, and the regenerated absorbent at normal pressure flows in. The atmospheric pressure chamber 90 for the second buffer in which a predetermined water level range is maintained, the sixth valve 116 provided at the front end of the second buffer atmospheric pressure chamber 90, and the seventh valve 117 provided at the rear end. , and a fourth water level sensor 91 for measuring the water level of the atmospheric pressure chamber 90 for the second buffer. And the control unit controls the opening and closing of the sixth valve 116 and the seventh valve 117 based on the value measured by the fourth water level sensor 91 so that the water level value of the atmospheric pressure chamber 90 for the second buffer is at a constant level. to stay within range.

That is, after the fifth valve 115 is opened and the regenerated absorbent flows into the second lock hopper 80 , the fifth valve 115 and the sixth valve 116 are closed, and the pressurization pump 81 is driven to After forming the inside of the second lock hopper 80 at atmospheric pressure, the sixth valve 116 is opened to introduce the regenerated absorbent into the atmospheric pressure chamber 90 for the second buffer. In this four-pressure process, the second pressure sensor 82 measures the internal pressure of the second lock hopper 80 in real time, and the controller 140 controls the operation of the pressurization pump 81, thereby It is controlled to pressurize until the internal pressure reaches normal pressure.

That is, the pressing process is continuously performed. As shown in FIG. 4A , in a state in which the desorption absorbent is introduced into the decompression chamber 70 for the second buffer, the second lock hopper 80 closes the sixth valve 116 to put the pressurized desorption absorbent into a standby state. maintained, and the seventh valve 117 is opened so that the absorbent at normal pressure is introduced into the absorption reactor 10 . And, as shown in FIG. 4B, when the water level of the pressure reducing chamber 70 for the second buffer is higher than a specific water level, the fifth valve 115 is opened to introduce the desorption absorbent into the second lock hopper 80, and The desorption absorbent at atmospheric pressure in the atmospheric pressure chamber 90 for the second buffer continues to flow into the adsorption reactor 10 .

And as shown in FIG. 4C, the desorption absorbent is added into the decompression chamber 70 for the second buffer in the process of closing the fifth valve 115 and the sixth valve 116 and driving the pressurization pump to pressurize. is introduced, and the desorption absorbent in the atmospheric pressure chamber 90 for the second buffer is introduced into the desorption reactor 40 . And, as shown in FIG. 4D, the absorbent pressurized to normal pressure by opening the sixth valve 116 is introduced into the atmospheric pressure chamber 90 for the second buffer. The process of Fig. 4a → Fig. 4b → Fig. 4c → Fig. 4d → Fig. 4a proceeds continuously.

In addition, the reduced pressure desorption reaction apparatus 110 according to the embodiment of the present invention is provided with a first flow rate control unit 121 between the reduced pressure chamber 52 for the first buffer and the desorption reactor 40, the desorption reactor (40) It may be configured to control the flow rate of the adsorbent introduced into the sorbent.

In addition, a second flow rate control unit 122 may be provided between the desorption reactor 40 and the second buffer decompression chamber 70 to adjust the flow rate of the regenerated absorbent discharged from the desorption reactor 40 .

In addition, a third flow rate control unit 123 may be provided at the rear end of the atmospheric pressure chamber 90 for the second buffer to adjust the flow rate of the regenerated absorbent flowing into the absorption reactor 10 .

And as shown in FIG. 2, the regeneration cyclone 44 is connected to the discharge end 41 provided at the upper end of the desorption reactor 40 to separate the gas 45 and the solid 46 discharged to the upper side. It can be seen that the configuration

In addition, in the apparatus and method described above, the configuration and method of the above-described embodiments are not limitedly applicable, but all or part of each embodiment is selectively combined so that various modifications can be made to the embodiments. may be configured.

1: Conventional dry CO2 capture system
10: adsorption reactor
11: Adsorption reactor discharge stage
12: Adsorption reactor inlet stage
13: adsorption reactor discharge stage
14: second adsorption cyclone
20: transfer pipe
30: first adsorption cyclone
31: gas discharge stage
32: solid discharge end
40: desorption reactor
41: desorption reactor discharge stage
42: desorption reactor inlet stage
43: desorption reactor discharge stage
50: atmospheric pressure chamber for the first buffer
51: first water level sensor
53: decompression chamber for the first buffer
54: second water level sensor
60: first lock hopper
61: pressure reducing pump
62: first pressure sensor
70: decompression chamber for the second buffer
71: third water level sensor
80: second lock hopper
81: pressurized pump
82: second pressure sensor
90: atmospheric pressure chamber for the second buffer
91: fourth water level sensor
100: Continuous moving bed CO2 capture system with reduced pressure desorption reactor
110: decompression desorption reaction device
111: first valve
112: second valve
113: third valve
114: fourth valve
115: fifth valve
116: sixth valve
117: seventh valve
121: first flow control unit
122: second flow control unit
123: third flow control unit
130: flow control means

Claims (16)

A reduced pressure desorption reaction apparatus for reacting a desorption reactor applied to a carbon dioxide capture system under reduced pressure conditions,
A desorption reactor for desorbing the carbon dioxide in the adsorption absorbent and discharging the regenerated regenerated absorbent under reduced pressure conditions by introducing an adsorbent adsorbing carbon dioxide; installed in front of the desorption reactor, when the adsorption absorbent flows in, the pressure is reduced , a first lock hopper for introducing the adsorption absorbent into the desorption reactor; and a second lock hopper installed at the rear end of the desorption reactor, pressurized to normal pressure when the regenerated absorbent is introduced, and then discharged.
an atmospheric chamber for a first buffer provided at the front end of the first lock hopper, the adsorption absorbent is introduced to maintain a predetermined water level range; a first valve provided at the front end of the atmospheric pressure chamber for the first buffer and a second valve provided at the rear end; a first water level sensor for measuring the level of the atmospheric pressure chamber for the first buffer; and a control unit controlling the opening and closing of the first valve and the second valve based on the value measured by the first water level sensor so that the water level value of the atmospheric pressure chamber for the first buffer is maintained within a predetermined water level range. a decompression chamber for a first buffer provided at the rear end of the first lock hopper and in which the decompressed adsorption absorbent is introduced to maintain a predetermined water level range; a third valve provided at the front end of the decompression chamber for the first buffer and a fourth valve provided at the rear end; and a second water level sensor for measuring the water level of the decompression chamber for the first buffer, wherein the control unit controls the opening and closing of the third valve and the fourth valve based on the value measured by the second water level sensor. so that the water level value of the decompression chamber for the first buffer is maintained within a predetermined water level range,
When the first valve is opened and the adsorption absorbent flows into the atmospheric pressure chamber for the first buffer, the water level in the atmospheric pressure chamber for the first buffer increases, and the first lock hopper dispenses the depressurized adsorbent into the atmospheric pressure chamber for the first buffer while the third valve is closed. While waiting, the absorbent in the decompression chamber for the first buffer flows into the desorption reactor side, and when the water level in the atmospheric pressure chamber for the first buffer exceeds a certain level, the second valve is opened to introduce the adsorbent into the first lock hopper, and the second The decompressed adsorbent in the decompression chamber for the buffer continues to flow into the desorption reactor, and in the process of continuously closing the second and third valves and driving the decompression pump to reduce the pressure, the adsorbent flows into the atmospheric chamber for the first buffer. and the adsorbent in the pressure reducing chamber for the first buffer is introduced into the desorption reactor, and the pressure-reduced adsorbent is controlled to flow into the pressure reducing chamber for the first buffer by opening the third valve.
delete delete delete The method of claim 1,
a decompression chamber for a second buffer provided at the front end of the second lock hopper and in which the regenerated absorbent is introduced to maintain a predetermined water level range; a fifth valve provided at a rear end of the decompression chamber for the second buffer; Including; a third water level sensor for measuring the water level in the pressure reducing chamber for the second buffer, the control unit controls the opening and closing of the fifth valve based on the value measured by the third water level sensor to control the pressure reduction chamber for the second buffer. Control to keep the water level value within a certain water level range,
6. The method of claim 5,
an atmospheric pressure chamber for a second buffer provided at the rear end of the second lock hopper and maintaining a predetermined water level range by introducing the regenerated absorbent at atmospheric pressure; a sixth valve provided at the front end of the atmospheric pressure chamber for the second buffer and a seventh valve provided at the rear end; and a fourth water level sensor measuring the water level of the atmospheric pressure chamber for the second buffer, wherein the control unit controls the opening and closing of the sixth valve and the seventh valve based on the value measured by the fourth water level sensor. so that the water level value of the atmospheric pressure chamber for the second buffer is maintained within a predetermined water level range,
7. The method of claim 6,
In a state where the desorption absorbent flows into the pressure reducing chamber for the second buffer, the second lock hopper closes the sixth valve to maintain the pressurized desorbent absorbent in a standby state, and the seventh valve is opened to allow the absorbent at atmospheric pressure to enter the absorption reactor. When the water level in the pressure reducing chamber for the second buffer is higher than a certain level, the fifth valve is opened to introduce the desorption absorbent into the second lock hopper, and the desorption absorbent at atmospheric pressure in the atmospheric pressure chamber for the second buffer continues the adsorption reactor. In the process of continuously closing the fifth and sixth valves and driving the pressurization pump to pressurize, the desorption absorbent flows into the decompression chamber for the second buffer, and the desorption absorbent in the atmospheric pressure chamber for the second buffer is desorbed and desorbed. A reduced pressure desorption reactor, characterized in that the absorbent, which is introduced into the reactor and pressurized to atmospheric pressure by opening the sixth valve, is introduced into the atmospheric pressure chamber for the second buffer.
8. The method of claim 7,
a first flow rate control unit provided between the decompression chamber for the first buffer and the desorption reactor to adjust the flow rate of the adsorbent introduced into the desorption reactor;
a second flow rate control unit provided between the desorption reactor and the reduced pressure chamber for the second buffer to adjust the flow rate of the regenerated absorbent discharged from the desorption reactor; and
a third flow rate control unit provided at the rear end of the atmospheric pressure chamber for the second buffer to adjust the flow rate of the regenerated absorbent introduced into the absorption reactor; A reduced pressure desorption reactor comprising at least any one of.
◈Claim 9 was abandoned at the time of payment of the registration fee.◈ 9. The method of claim 8,
The reduced pressure desorption reaction apparatus further comprising a; a regeneration cyclone connected to a discharge end provided on one side of the upper end of the desorption reactor to separate gas and solid.
◈Claim 10 was abandoned when paying the registration fee.◈ 10. A method for reacting a desorption reactor applied to a carbon dioxide capture system under reduced pressure conditions using the reduced pressure desorption reactor according to any one of claims 1 to 9,
a first step of introducing an adsorbent into a first lock hopper installed in front of the desorption reactor;
a second step of depressurizing the adsorbent introduced into the first lock hopper by a pressure reducing pump;
a third step in which the adsorbent is introduced into the desorption reactor in a reduced pressure state, the carbon dioxide in the adsorption absorbent is desorbed under reduced pressure, and the regenerated absorbent is discharged through a discharge stage;
a fourth step of introducing the regenerated absorbent into a second lock hopper installed at the rear end of the desorption reactor; and
A fifth step of pressurizing the regenerated absorbent introduced into the second lock hopper to normal pressure by a pressurizing pump;
In the first step and the second step,
The adsorption absorbent flows into the first lock hopper while the atmospheric pressure chamber for the first buffer installed at the front end of the first lock hopper is maintained within a predetermined water level range by the first and second valves;
The adsorption absorbent flows into the desorption reactor while the pressure-reducing chamber for the first buffer installed at the rear end of the first lock hopper is maintained within a predetermined water level range by the third and fourth valves,
In the fourth and fifth steps,
The adsorption absorbent flows into the first lock hopper while the atmospheric pressure chamber for the first buffer installed at the front end of the first lock hopper is maintained within a predetermined water level range by the first and second valves;
Operation of a reduced pressure desorption reactor, characterized in that the pressure-reducing chamber for the first buffer installed at the rear end of the first lock hopper is maintained in a predetermined water level range by the third and fourth valves, and the adsorbent is introduced into the desorption reactor Way.
delete delete In the CO2 capture system,
an adsorption reactor in which the regenerated absorbent is introduced and the regenerated absorbent adsorbs carbon dioxide and discharges the adsorbed adsorbent under atmospheric pressure; and
10. The reduced pressure desorption reactor according to any one of claims 1 and 5 to 9, wherein the adsorption absorbent discharged from the adsorption reactor is introduced to regenerate the adsorption absorbent under reduced pressure conditions, and then flows into the adsorption reactor; A continuous moving bed CO2 capture system having a reduced pressure desorption reactor, characterized in that it comprises a.
◈Claim 14 was abandoned at the time of payment of the registration fee.◈ 14. The method of claim 13,
A first adsorption cyclone provided between the adsorption reactor and the reduced pressure desorption reaction device to separate the gas and solid in the fluid discharged from the adsorption reactor, and introduce a solid adsorption absorbent to the reduced pressure desorption reaction device side; further comprising A continuous moving bed CO2 capture system having a reduced pressure desorption reactor, characterized in that
◈Claim 15 was abandoned when paying the registration fee.◈ 15. The method of claim 14,
A continuous moving bed CO2 collection system having a reduced pressure desorption reactor, characterized in that it further comprises; a second adsorption cyclone connected to the discharge end provided at the upper end of the adsorption reactor to separate gas and solid.
◈Claim 16 was abandoned at the time of payment of the registration fee.◈ 16. The method of claim 15,
A continuous moving bed CO2 collection system having a reduced pressure desorption reaction device, characterized in that it further comprises; a flow rate control means provided on one side of the rear end of the adsorption reactor to adjust the flow rate of the adsorbent discharged.

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