Lean and rich liquid tank integrated heat exchange device and carbon capture system

Abstract

The present invention discloses a lean and rich liquid tank integrated heat exchange device and a carbon capture system. The lean and rich liquid tank integrated heat exchange device includes a tower body having a first chamber, a second chamber, and a third chamber. The first chamber has a first inlet and a first outlet, and the second chamber has a second inlet and a second outlet. The device also includes a heat exchange tube bundle disposed within the third chamber to separate the third chamber into a shell-side flow channel and a tube-side flow channel. The shell-side flow channel has a third inlet and a third outlet, and the tube-side flow channel has a fourth inlet and a fourth outlet. The third inlet is used to connect to a regeneration tower, the third outlet is connected to the first inlet, and the fourth inlet is connected to the second outlet. The fourth outlet is used to connect to the regeneration tower, and the first and second inlets are used to connect to an absorption tower. The present invention has the advantages of high integration, reduced floor space, and reduced pipeline length.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon capture, and in particular relates to a lean-rich liquid tank integrated heat exchange device and a carbon capture system. Background Art

[0002] A heat exchanger is arranged between the absorption tower and the regeneration tower of the carbon capture system. Part of the rich liquid discharged from the absorption tower is heated by heat exchange in the heat exchanger and then enters the regeneration tower. The high-temperature lean liquid discharged from the regeneration tower is cooled by the heat exchanger and then enters the absorption tower. At the same time, a rich liquid tank is arranged between the rich liquid outlet of the absorption tower and the heat exchanger, and a lean liquid tank is set between the heat exchanger and the lean liquid inlet of the absorption tower, so that the rich liquid discharged from the absorption tower and the rich liquid entering the absorption tower can be stored in the corresponding tank bodies, thereby ensuring the stability of the absorbent flow in the regeneration tower and the absorption tower.

[0003] However, in the related art, the heat exchanger, lean liquid tank, and rich liquid tank are arranged separately, occupying a large area, which is not conducive to the site selection of the construction site. The need to coordinate the construction progress of different tower bodies also affects the construction efficiency. At the same time, it also leads to longer connecting pipelines, increasing construction costs. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a lean and rich liquid tank integrated heat exchange device with high integration and reduced floor space and pipeline length.

[0006] An embodiment of the present invention further provides a carbon capture system.

[0007] According to an embodiment of the present invention, the integrated heat exchange device of the rich and poor liquid tanks includes a tower body, the tower body having a first cavity, a second cavity and a third cavity, the first cavity, the second cavity and the third cavity being sequentially nested together from the outside to the inside;

[0008] The first chamber has a first inlet and a first outlet, and the second chamber has a second inlet and a second outlet;

[0009] The heat exchange tube bundle is provided in the third cavity to separate the third cavity into a shell-side flow channel and a tube-side flow channel, the shell-side flow channel has a third inlet and a third outlet, and the tube-side flow channel has a fourth inlet and a fourth outlet;

[0010] The third inlet is used to connect to the regeneration tower, the third outlet is connected to the first inlet, the fourth inlet is connected to the second outlet, the fourth outlet is used to connect to the regeneration tower, and the first outlet and the second inlet are used to connect to the absorption tower;

[0011] The lean liquid discharged from the regeneration tower flows into the first chamber from the first inlet after heat exchange through the shell-side flow channel; the rich liquid discharged from the absorption tower flows into the second chamber through the second inlet, and at least part of the rich liquid in the second chamber flows to the regeneration tower after heat exchange through the tube-side flow channel.

[0012] In the embodiment of the present invention, a first chamber, a second chamber, and a third chamber are arranged within the tower body, respectively for storing the rich liquid discharged from the absorption tower, storing the lean liquid entering the absorption tower, and serving as a heat exchange chamber. This integrates the lean liquid tank, the rich liquid tank, and the heat exchanger into one unit, thereby reducing floor space and avoiding the need to construct the lean liquid tank, the rich liquid tank, and the heat exchanger separately during construction, thereby improving construction efficiency. Furthermore, the embodiment of the present invention can reduce the length of the connecting pipelines between the lean liquid tank and the heat exchanger, and between the rich liquid tank and the heat exchanger, thereby reducing energy consumption during the transportation of the lean and rich liquids, and thus achieving more efficient heat exchange and transportation of the lean and rich liquids. Furthermore, the embodiment of the present invention stores the lean liquid in the first chamber, the rich liquid in the second chamber, and the third chamber as the heat exchange chamber, thereby further improving heat exchange efficiency. Using the first and second chambers as insulation layers can prevent heat loss in the heat exchange chamber and improve heat utilization. The first chamber can naturally cool by contact with the atmosphere, further reducing the temperature of the lean liquid in the first chamber and reducing the energy consumed by cooling the lean liquid being transported to the absorption tower.

[0013] In some embodiments, the system further comprises a first plate, the first plate being disposed in the third cavity to separate the shell-side flow channel into a plurality of branch flow channels arranged side by side, wherein the plurality of branch flow channels are connected end to end in sequence;

[0014] There are multiple groups of heat exchange tube bundles, and the multiple groups of heat exchange tube bundles are respectively arranged in the multiple branch channels, and the multiple groups of heat exchange tube bundles are connected in sequence end to end.

[0015] The first plate in the embodiment of the present invention divides the third cavity into multiple branch channels, extending the flow path of the lean liquid in the shell-side channel. The arrangement of multiple groups of heat exchange tube bundles can increase the heat exchange time of the rich liquid in the heat exchange tube bundles and improve the overall heat exchange efficiency.

[0016] In some embodiments, the branch channel and the heat exchange tube bundle extend in the horizontal direction, at least two adjacent branch channels are arranged side by side in the vertical direction, and a converging shell is provided between the heat exchange tube bundle in the branch channel located above and the heat exchange tube bundle in the branch channel located below, and the converging shell includes a first chamber and a second chamber, one of the first chamber and the second chamber is connected to the heat exchange tube bundle in the branch channel located above, and the other is connected to the heat exchange tube bundle in the branch channel located below, and a connecting channel is provided between the first chamber and the second chamber, and the flow area of ​​the connecting channel is smaller than the flow area of ​​the first chamber and the second chamber.

[0017] In the embodiment of the present invention, the branch channel and the heat exchange tube bundle extend in the horizontal direction. On the one hand, this can ensure that the lean liquid on the shell side and the rich liquid on the tube side flow more stably and evenly. On the other hand, by providing a converging shell, the rich liquid in the heat exchange tube bundle can be mixed and redistributed, thereby improving the uniformity of heat exchange and thus improving the heat exchange effect.

[0018] In some embodiments, the integrated heat exchange device of the rich and lean liquid tanks further includes a flow guide assembly, and a plurality of the flow guide assemblies are arranged at intervals in each of the branch channels along the extension direction of the heat exchange tube bundle, and the flow guide assembly includes a plurality of parallel and spaced second plates, and the second plates are arranged at an angle relative to the extension direction of the heat exchange tube bundle.

[0019] The guide component in the embodiment of the present invention can guide the liquid in the branch channel so that the liquid at different positions on the same cross-section in the branch channel can be mixed, avoiding the stratified flow of the liquid in the branch channel, resulting in problems such as poor liquid fluidity and poor heat exchange effect.

[0020] In some embodiments, the upper end of the second plate is arranged to be tilted backward along the liquid flow direction in the branch channel, and the projections of the multiple second plates located in the same guide assembly in the vertical direction do not overlap, and the projections of the multiple second plates located in the same guide assembly in the extension direction of the heat exchange tube bundle do not overlap.

[0021] The second plate of the embodiment of the present invention can guide the liquid flowing toward the second plate to flow upward and form a mixing zone on the back water surface of the second plate, thereby improving the mixing effect of the liquid. The projections of the multiple second plates located in the same guide assembly in the vertical direction and the extension direction of the heat exchange tube bundle do not overlap, which can reduce the flow resistance of the liquid. On the premise of ensuring that the liquid can flow stably, the energy required to drive the liquid flow is reduced, and the temperature consistency of the shell-side liquid in the branch channel is improved.

[0022] In some embodiments, among the plurality of second plates in the same guide assembly, the distance between the projections of two adjacent second plates in the extension direction of the heat exchange tube bundle is 0 mm to 150 mm;

[0023] And / or, among the plurality of second plates in the same guide assembly, the distance between the projections of two adjacent second plates in the vertical direction is 100-300 mm;

[0024] and / or, the angle between the second plate and the extension direction of the heat exchange tube bundle is 30° to 55°;

[0025] And / or, the number of the second plates located in the same guide assembly is 3 to 15.

[0026] In the embodiment of the present invention, by limiting the spatial position relationship of multiple second plates located in the same guide assembly and limiting the inclination angle and number of the second plates, the flow resistance of the liquid can be further reduced, and the fluidity of the shell-side liquid in the vertical direction can be improved, which has the advantages of taking into account both the improvement of the fluidity of the shell-side liquid and the mixing effect of the liquid.

[0027] In some embodiments, the tower body extends in a horizontal direction, the first outlet and the second inlet are provided at one end of the tower body, and the third inlet and the fourth outlet are provided at the other end of the tower body.

[0028] In the embodiment of the present invention, by placing the tower body horizontally, adopting a horizontal lean and rich liquid tank integrated heat exchange device, and optimizing the positions of different inlets and outlets, the length of the tower body can be utilized to further reduce the length of the connecting pipelines between the lean and rich liquid tank integrated heat exchange device and the regeneration tower and absorption tower, thereby reducing costs.

[0029] In some embodiments, the tower body includes a first shell, a second shell and a third shell, and the first shell, the second shell and the third shell are arranged together from the outside to the inside, a first cavity is defined between the first shell and the second shell, a second cavity is defined between the second shell and the third shell, and the third shell defines a third cavity.

[0030] The tower structure of the embodiment of the present invention is composed of multiple shells nested together, which can better ensure the stability of the structure. It can be manufactured and assembled in sections and parts during the production process, reducing the difficulty and cost of manufacturing and better ensuring the structural stability of the assembled tower body.

[0031] In some embodiments, the lean and rich liquid tank integrated heat exchange device further includes a fourth shell and a cooling assembly, wherein a cooling cavity is formed between the fourth shell and the outer wall of the tower body, one end of the cooling cavity is connected to the atmosphere, and the other end of the cooling cavity is connected to the air outlet end of the cooling assembly;

[0032] The cooling assembly includes a first fan and / or a second fan, the first fan includes a first fan blade and a first driver, the second fan includes a second fan blade and a driving impeller, and the driving impeller is arranged at the first inlet.

[0033] The fourth shell of the embodiment of the present invention is spaced apart from the outer wall of the tower body to form a cooling chamber. The cooling chamber is used for air flow, thereby cooling the outer wall of the tower body, and at the same time, it can cool the lean liquid in the first chamber. The cooling component is used to drive the gas flow, and can be driven by a driver such as a motor. It can also use the lean liquid entering the first chamber as power to drive the impeller to rotate and then drive the fan blades to rotate, saving energy consumption.

[0034] The carbon capture system of an embodiment of the present invention comprises an absorption tower, a regeneration tower and a heat exchange device, wherein the heat exchange device is a lean-rich liquid tank integrated heat exchange device as described in any one of the above items;

[0035] The rich liquid outlet of the absorption tower is connected to the second inlet of the lean and rich liquid tank integrated heat exchange device, and the lean liquid inlet of the absorption tower is connected to the first outlet of the lean and rich liquid tank integrated heat exchange device;

[0036] The lean liquid outlet of the regeneration tower is connected to the third inlet of the lean and rich liquid tank integrated heat exchange device, and the rich liquid inlet of the regeneration tower is connected to the fourth outlet of the lean and rich liquid tank integrated heat exchange device.

[0037] At least some of the beneficial effects achieved by the carbon capture system of the embodiment of the present invention are the same as those achieved by the lean-rich liquid tank integrated heat exchange device in the above embodiment, and therefore will not be described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic cross-sectional structural diagram of a lean and rich liquid tank integrated heat exchange device according to an embodiment of the present invention.

[0039] Figure 2 It is a structural schematic diagram of one end of the lean and rich liquid tank integrated heat exchange device according to an embodiment of the present invention.

[0040] Figure 3 It is a structural schematic diagram of the other end of the lean and rich liquid tank integrated heat exchange device according to an embodiment of the present invention.

[0041] Figure 4 Schematic diagram of the structure of the flow guide assembly in an embodiment of the present invention.

[0042] Figure 5 Schematic diagram of the structure of the confluence housing in an embodiment of the present invention.

[0043] Figure 6 2 is a schematic diagram of the connection structure of the fourth shell in an embodiment of the present invention.

[0044] Figure 7 Schematic diagram of the structure of the carbon capture system in an embodiment of the present invention.

[0045] Reference numerals:

[0046] 100. Integrated heat exchange device for rich and poor liquid tanks;

[0047] 1. Tower body; 11. First shell; 12. Second shell; 13. Third shell; 14. First chamber; 141. First inlet; 142. First outlet; 15. Second chamber; 151. Second inlet; 152. Second outlet; 16. Third chamber; 161. Third inlet; 162. Third outlet;

[0048] 2. Heat exchange tube bundle; 21. Fourth inlet; 22. Fourth outlet;

[0049] 3. First board;

[0050] 4. Converging housing; 41. First chamber; 42. Second chamber; 43. Connecting channel;

[0051] 5. flow guide assembly; 51. second plate;

[0052] 6. Fourth shell;

[0053] 200. Absorption tower;

[0054] 300. Regeneration tower. DETAILED DESCRIPTION

[0055] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0056] The following combination Figure 1-Figure 7 The lean and rich liquid tank integrated heat exchange device 100 and the carbon capture system according to an embodiment of the present invention are described in detail.

[0057] like Figure 1-Figure 3 According to an embodiment of the present invention, the integrated heat exchange device 100 of the rich and poor liquid tanks includes a tower body 1, which has a first chamber 14, a second chamber 15 and a third chamber 16. The first chamber 14, the second chamber 15 and the third chamber 16 are sequentially nested together from the outside to the inside. The first chamber 14 has a first inlet 141 and a first outlet 142, and the second chamber 15 has a second inlet 151 and a second outlet 152.

[0058] It should be understood that the third chamber 16 serves as a heat exchange chamber and is used for heat exchange between lean and rich liquids. The first chamber 14 is located at the outermost side of the tower body 1 and is used to store lean liquid after heat exchange. The second chamber 15 is located between the first chamber 14 and the third chamber 16, and the second chamber 15 is used to store rich liquid before heat exchange.

[0059] The lean liquid in the first chamber 14 needs to be transported to the absorption tower 200 to undergo an absorption reaction with carbon dioxide, thereby performing carbon capture. Therefore, the temperature of the lean liquid needs to be maintained at approximately 40° C. Therefore, placing the lean liquid in the first chamber 14 allows the lean liquid in the first chamber 14 to undergo indirect heat exchange with the atmosphere through the side wall of the tower body 1, thereby lowering the temperature of the lean liquid in the first chamber 14 and reducing the energy consumed for further cooling the lean liquid when transporting it to the absorption tower 200, thereby achieving the advantage of energy saving.

[0060] The third chamber 16 is arranged in the middle, which can reduce the heat loss in the third chamber 16 and transfer the lost heat to the rich liquid in the second chamber 15 to preheat the rich liquid and improve the heat utilization rate.

[0061] In the embodiment of the present invention, a heat exchange tube bundle 2 is provided in the third chamber 16, which divides the third chamber 16 into a shell-side flow channel and a tube-side flow channel. The shell-side flow channel has a third inlet 161 and a third outlet 162, and the tube-side flow channel has a fourth inlet 21 and a fourth outlet 22. The third inlet 161 is used to connect to the regeneration tower 300, the third outlet 162 is connected to the first inlet 141, the fourth inlet 21 is connected to the second outlet 152, the fourth outlet 22 is used to connect to the regeneration tower 300, and the first outlet 142 and the second inlet 151 are used to connect to the absorption tower 200.

[0062] The lean liquid discharged from the regeneration tower 300 flows into the first chamber 14 from the first inlet 141 after heat exchange through the shell-side flow channel; the rich liquid discharged from the absorption tower 200 flows into the second chamber 15 through the second inlet 151, and at least part of the rich liquid in the second chamber 15 flows to the regeneration tower 300 after heat exchange through the tube-side flow channel.

[0063] That is to say, during the carbon capture process, the lean liquid is discharged from the regeneration tower 300, at which time the temperature of the lean liquid is about 100°C to 120°C, and the rich liquid is discharged from the absorption tower 200, at which time the temperature of the rich liquid is about 40°C to 60°C. The rich liquid is first stored in the second chamber 15 before heat exchange, and part of the rich liquid in the second chamber 15 is transported into the tube-side flow channel and then exchanged with the lean liquid directly transported into the shell-side flow channel. The lean liquid cooled by heat exchange is stored in the first chamber 14, and the rich liquid heated by heat exchange is transported to the regeneration tower 300 for regeneration. When it is necessary to supply liquid to the absorption tower 200, the lean liquid is extracted from the first chamber 14 and transported to the absorption tower 200.

[0064] In the embodiment of the present invention, a first chamber 14, a second chamber 15, and a third chamber 16 are arranged within the tower body 1 to store the rich liquid discharged from the absorption tower 200, store the lean liquid entering the absorption tower 200, and serve as a heat exchange chamber, respectively. This integrates the lean liquid tank, the rich liquid tank, and the heat exchanger into one, thereby reducing floor space and avoiding separate construction of the lean liquid tank, the rich liquid tank, and the heat exchanger during construction, thereby improving construction efficiency. Furthermore, the embodiment of the present invention can reduce the length of the connecting pipelines used between the lean liquid tank and the heat exchanger, and between the rich liquid tank and the heat exchanger in the related art, reduce energy consumption during the transportation of the lean and rich liquids, and more efficiently achieve heat exchange and transportation of the lean and rich liquids.

[0065] In the embodiment of the present invention, the lean liquid is stored in the first chamber 14, the rich liquid is stored in the second chamber 15, and the third chamber 16 is used as a heat exchange chamber, which can better improve the heat exchange efficiency. The first chamber 14 and the second chamber 15 are used as insulation layers to avoid heat loss in the heat exchange chamber and improve the utilization rate of heat. The first chamber 14 can use natural cooling by contact with the atmosphere to further reduce the temperature of the lean liquid in the first chamber 14 and reduce the energy consumption consumed for cooling the lean liquid transported to the absorption tower 200.

[0066] like Figure 1 As shown, in some embodiments, a first plate 3 is further included, which is arranged in the third cavity 16 to divide the shell-side flow channel into a plurality of branch channels arranged side by side, and the plurality of branch channels are connected end to end in sequence; the number of heat exchange tube bundles 2 is multiple, and the plurality of heat exchange tube bundles 2 are respectively arranged in the plurality of branch channels, and the plurality of heat exchange tube bundles 2 are connected end to end in sequence.

[0067] The first plate 3 in the embodiment of the present invention divides the third cavity 16 into multiple branch channels, extending the flow path of the lean liquid in the shell-side flow channel. The arrangement of multiple groups of heat exchange tube bundles 2 can increase the heat exchange time of the rich liquid in the heat exchange tube bundles 2 and improve the overall heat exchange efficiency.

[0068] For example, there is one first plate 3, which divides the shell-side flow channel into two parallel branch channels, one end of which is connected, so that the shell-side flow channel is "n"-shaped, and the other end of one branch channel is provided with a third inlet 161, and the other end of the other branch channel is provided with a third outlet 162, so that the high-temperature lean liquid entering the shell-side flow channel can flow along the n-shaped shell-side flow channel. Compared with the shell-side flow channel without the first plate 3, the flow paths of the rich liquid in the tube-side flow channel and the lean liquid in the shell-side flow channel can be doubled.

[0069] For another example, the number of the first plates 3 is 2, 4 or more, thereby dividing the shell-side flow channel into an "S"-shaped serpentine flow channel.

[0070] like Figure 1 As shown, in some embodiments, the branch channel and the heat exchange tube bundle 2 extend in the horizontal direction, at least two adjacent branch channels are arranged side by side in the vertical direction, and a converging shell 4 is provided between the heat exchange tube bundle 2 in the upper branch channel and the heat exchange tube bundle 2 in the lower branch channel.

[0071] The converging shell 4 includes a first chamber 41 and a second chamber 42. One of the first chamber 41 and the second chamber 42 is connected to the heat exchange tube bundle 2 in the branch channel located above, and the other is connected to the heat exchange tube bundle 2 in the branch channel located below. A connecting channel 43 is provided between the first chamber 41 and the second chamber 42. The flow area of ​​the connecting channel 43 is smaller than the flow area of ​​the first chamber 41 and the second chamber 42.

[0072] It should be understood that the branch channel and the heat exchange tube bundle 2 extend in the horizontal direction, such as the left-right direction as shown in the figure. The heat exchange tube bundle 2 includes a plurality of parallel and spaced heat exchange tubes. The rich liquid in different heat exchange tubes will have different temperatures due to the different positions of the heat exchange tubes. In the embodiment of the present invention, a converging shell 4 is provided to enable the rich liquid in the heat exchange tube bundle 2 in the branch channel above to mix after entering the first chamber 41, and then flow into the second chamber 42 through the connecting channel, thereby ensuring better temperature consistency of the rich liquid entering the second chamber 42 and improving the heat exchange effect.

[0073] Optionally, the confluence shell 4 is hourglass-shaped, and the flow area of ​​the connecting channel 43 is smaller than the flow area of ​​the first chamber 41 and the second chamber 42. Therefore, the rich liquid flowing into the first chamber 41 can have sufficient time to mix and balance the temperature before flowing into the second chamber 42.

[0074] Furthermore, the confluence housing 4 is also arranged in the shell-side flow channel, so as to avoid heat loss caused by arranging the confluence housing 4 outside the shell-side flow channel.

[0075] In the embodiment of the present invention, the branch channel and the heat exchange tube bundle 2 extend in the horizontal direction. On the one hand, this can ensure that the lean liquid on the shell side and the rich liquid on the tube side flow more stably and evenly. On the other hand, by providing the confluence shell 4, the rich liquid in the heat exchange tube bundle 2 can be mixed and redistributed, thereby improving the uniformity of heat exchange and thus improving the heat exchange effect.

[0076] like Figure 1 and Figure 4 As shown, in some embodiments, the lean and rich liquid tank integrated heat exchange device 100 further includes a flow guide component 5, and a plurality of flow guide components 5 are arranged at intervals along the extension direction of the heat exchange tube bundle 2 in each branch channel. The flow guide component 5 includes a plurality of parallel and spaced second plates 51, and the second plates 51 are arranged at an angle relative to the extension direction of the heat exchange tube bundle 2.

[0077] Because the liquid flowing in the branch channel can easily experience significant differences in solution flow velocity due to different heights, this can lead to significant temperature differences in the solution at different locations, affecting the heat exchange efficiency of different heat exchange tubes in the heat exchange tube bundle 2. The flow guide assembly 5 in this embodiment of the present invention can guide the liquid in the branch channel, allowing the liquid at different locations on the same cross-section of the branch channel to mix, thereby preventing stratified flow of the liquid in the branch channel, which can lead to problems such as poor liquid fluidity and poor heat exchange performance.

[0078] The second plate 51 of the embodiment of the present invention can guide the liquid in the shell side flow channel to flow along the inclined direction of the second plate 51, and at the same time form a mixing zone on the back surface of the second plate 51, and the solutions on the upper and lower sides of the second plate 51 can be remixed in the mixing zone.

[0079] Furthermore, the third inlet 161 is provided in the lower region of the shell-side flow channel. When the high-temperature lean liquid discharged from the regeneration tower 300 enters the shell-side flow channel, it can gradually diffuse from the bottom and improve the fluidity of the bottom solution of the shell-side flow channel.

[0080] In some embodiments, the upper end of the second plate 51 is tilted backward along the liquid flow direction in the branch channel, and the projections of the multiple second plates 51 located in the same guide component 5 in the vertical direction do not overlap, and the projections of the multiple second plates 51 located in the same guide component 5 in the extension direction of the heat exchange tube bundle 2 do not overlap.

[0081] The second plate 51 of the embodiment of the present invention can guide the liquid flowing toward the second plate 51 to flow upward, and form a mixing zone on the back surface of the second plate 51, thereby improving the mixing effect of the liquid. The projections of the multiple second plates 51 located in the same guide assembly 5 in the vertical direction and the projections in the extension direction of the heat exchange tube bundle 2 do not overlap, which can reduce the flow resistance of the liquid. On the premise of ensuring that the liquid can flow stably, the energy required to drive the liquid flow is reduced, and the temperature consistency of the shell side liquid in the branch channel is improved.

[0082] like Figure 4 As shown in FIG, the plurality of second plates 51 arranged from bottom to top in the same guide component 5 are arranged in sequence along the liquid flow direction at the same time, that is, the plurality of second plates 51 arranged from bottom to top in the same guide component 5 are arranged in sequence along the liquid flow direction at the same time ( Figure 4 They are arranged from front to back in the direction from right to left in the figure.

[0083] Furthermore, among the multiple second plates 51 located in the same flow guide assembly 5, the distance between the projections of two adjacent second plates 51 in the direction of extension of the heat exchange tube bundle 2 ranges from 0 mm to 150 mm. The distance between the projections of two adjacent second plates 51 in the direction of extension of the heat exchange tube bundle 2 is the distance H shown in the figure. Distance H can be 0 mm, 10 mm, 18 mm, 36 mm, 44 mm, 69 mm, 90 mm, 135 mm, or 150 mm. When H is less than 0, the projections of the two second plates 51 in the direction of extension of the heat exchange tube bundle 2 partially overlap, which is detrimental to liquid flow along the extension direction of the flow channel and increases the flow resistance of the liquid flowing through the gap between the two second plates 51. When H is greater than 150 mm, the gap between the projections of the two adjacent second plates 51 in the direction of extension of the heat exchange tube bundle 2 is likely to be too large, making it difficult for liquid to flow upward along the second plates 51, hindering vertical mixing of the liquid and resulting in poor uniformity.

[0084] Furthermore, among the multiple second plates 51 located in the same flow guide assembly 5, the spacing distance between the projections of two adjacent second plates 51 in the vertical direction is 100-300 mm; wherein, the spacing distance between the projections of two adjacent second plates 51 in the vertical direction is the distance S shown in the figure, and the value of the distance S can be 100 mm, 110 mm, 136 mm, 169 mm, 190 mm, 235 mm or 300 mm. When the distance S is less than 100 mm, it is easy to cause the flow gap between the two adjacent second plates 51 to be too small, which is not conducive to the flow of liquid and cannot better distribute the flow. When the distance S is greater than 300 mm, it is easy to cause the flow gap to be too large, which is not good for the mixing effect of liquid at different positions in the vertical direction, affecting the heat exchange effect.

[0085] In some embodiments, the angle between the second plate 51 and the extension direction of the heat exchange tube bundle 2 is 30° to 55°. It should be understood that the angle β between the second plate 51 and the extension direction of the heat exchange tube bundle 2 is 30°, 36°, 41°, 45.5°, 50° or 55°. When the angle β is less than 30°, the second plate 51 is too flat to cause disturbance of liquids at different layers in the vertical direction, resulting in poor mixing effect. When the angle β is greater than 55°, the slope of the second plate 51 is too large, which increases the flow resistance of the liquid flowing upward along the second plate 51, affecting the fluidity and mixing effect of the liquid.

[0086] Furthermore, the number of second plates 51 in a single flow guide assembly 5 ranges from 3 to 15. The number of second plates 51 is appropriately determined based on the vertical height of the diversion channel and the vertical dimensions of a single second plate 51 to improve the mixing effect between liquids at different vertical levels of the diversion channel. The number of second plates 51 in a single flow guide assembly 5 can be 3, 5, 7, 8, 12, or 15.

[0087] In the embodiment of the present invention, by limiting the spatial position relationship of multiple second plates 51 located in the same guide assembly 5 and limiting the inclination angle and number of the second plates 51, the flow resistance of the liquid can be further reduced, and the fluidity of the shell-side liquid in the vertical direction can be improved, which has the advantages of taking into account both the improvement of the fluidity of the shell-side liquid and the mixing effect of the liquid.

[0088] like Figure 2 and Figure 3 As shown, in some embodiments, the tower body 1 extends horizontally, the first outlet 142 and the second inlet 151 are provided at one end of the tower body 1 , and the third inlet 161 and the fourth outlet 22 are provided at the other end of the tower body 1 .

[0089] Specifically, the tower body 1 extends in a horizontal direction, and the tower body 1 has a first end close to the absorption tower 200 and a second end close to the regeneration tower 300. The first outlet 142 and the second inlet 151 are arranged at the first end of the tower body 1 close to the absorption tower 200, and the third inlet 161 and the fourth outlet 22 are arranged at the second end of the tower body 1 close to the regeneration tower 300.

[0090] In the embodiment of the present invention, by placing the tower body 1 horizontally, adopting a horizontal lean and rich liquid tank integrated heat exchange device 100, and optimizing the positions of different inlets and outlets, the length of the tower body 1 can be utilized to further reduce the length of the connecting pipelines between the lean and rich liquid tank integrated heat exchange device 100 and the regeneration tower 300 and the absorption tower 200, thereby reducing costs.

[0091] Furthermore, by constructing a steel structure support frame, the lean and rich liquid tank integrated heat exchange device 100 is supported off the ground, thereby saving ground space.

[0092] like Figure 1 As shown, in some embodiments, the tower body 1 includes a first shell 11, a second shell 12 and a third shell 13. The first shell 11, the second shell 12 and the third shell 13 are arranged together from the outside to the inside. A first cavity 14 is defined between the first shell 11 and the second shell 12, a second cavity 15 is defined between the second shell 12 and the third shell 13, and the third shell 13 defines a third cavity 16.

[0093] The tower body 1 structure of the embodiment of the present invention is composed of multiple shells nested together, which can better ensure the stability of the structure. It can be manufactured and assembled in sections and parts during the production process, reducing the difficulty and cost of manufacturing and better ensuring the structural stability of the assembled tower body 1.

[0094] Optionally, the cross-sections of the first shell 11, the second shell 12 and the third shell 13 are all circular, the first shell 11, the second shell 12 and the third shell 13 are coaxially arranged, and support end plates are set at both ends of the first shell 11, the second shell 12 and the third shell 13, and the three shells are connected together through the support end plates.

[0095] Furthermore, if the axial dimensions of the first, second, and third shells 11, 12, and 13 are too large, a segmented design can be employed. Support ribs can be provided between the first and second shells 11, 12, and between the second and third shells 12, 13. An intermediate support base can be provided between the middle of the first shell 11 and the ground to enhance the structural stability of the tower body 1.

[0096] like Figure 6As shown, in some embodiments, the lean and rich liquid tank integrated heat exchange device 100 also includes a fourth shell 6 and a cooling assembly, and a cooling cavity is formed between the fourth shell 6 and the outer wall of the tower body 1, one end of the cooling cavity is connected to the atmosphere, and the other end of the cooling cavity is connected to the air outlet end of the cooling assembly.

[0097] A spiral guide plate may be provided in the cooling cavity to guide the air entering the cooling cavity to flow in a spiral along the outer wall of the tower body 1 , thereby improving the cooling effect on the outer wall of the tower body 1 .

[0098] The cooling assembly includes a first fan and / or a second fan. The first fan includes a first fan blade and a first driver. The second fan includes a second fan blade and a driving impeller. The driving impeller is provided at the first inlet 141 .

[0099] The first fan is driven by a first driver, which is a motor. The motor can drive the first fan blade to rotate to deliver cooling air to the cooling chamber. The driving impeller of the second fan is arranged at the first inlet 141. When the lean liquid enters the first chamber 14 from the first inlet 141, it can drive the driving impeller to rotate, thereby driving the second fan blade of the second fan to rotate and deliver cooling air to the cooling chamber.

[0100] The fourth shell 6 of the embodiment of the present invention is spaced apart from the outer wall of the tower body 1 to form a cooling chamber. The cooling chamber is used for air flow, thereby cooling the outer wall of the tower body 1 and cooling the lean liquid in the first chamber 14. The cooling component is used to drive the gas flow and can be driven by a driver such as a motor. The lean liquid entering the first chamber 14 can also be used as power to drive the impeller to rotate and then drive the fan blades to rotate, thereby saving energy consumption.

[0101] like Figure 7 As shown, the carbon capture system of an embodiment of the present invention includes an absorption tower 200, a regeneration tower 300 and a heat exchange device, and the heat exchange device is any one of the above-mentioned lean and rich liquid tank integrated heat exchange devices 100, the rich liquid outlet of the absorption tower 200 is connected to the second inlet 151 of the lean and rich liquid tank integrated heat exchange device 100, the lean liquid inlet of the absorption tower 200 is connected to the first outlet 142 of the lean and rich liquid tank integrated heat exchange device 100, the lean liquid outlet of the regeneration tower 300 is connected to the third inlet 161 of the lean and rich liquid tank integrated heat exchange device 100, and the rich liquid inlet of the regeneration tower 300 is connected to the fourth outlet 22 of the lean and rich liquid tank integrated heat exchange device 100.

[0102] At least some of the beneficial effects achieved by the carbon capture system according to the embodiment of the present invention are the same as those achieved by the lean-rich liquid tank integrated heat exchange device 100 in the above embodiment, and therefore will not be described in detail.

[0103] The carbon capture system of the embodiment of the present invention can reduce floor space, improve the heat exchange efficiency of the lean liquid discharged from the regeneration tower 300 and the rich liquid discharged from the absorption tower 200 by 5%-15%, and save energy.

[0104] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0105] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0106] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0107] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0108] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0109] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A lean and rich liquid tank integrated heat exchange device, characterized in that: The tower body comprises a first cavity, a second cavity and a third cavity, wherein the first cavity, the second cavity and the third cavity are sequentially nested together from the outside to the inside; The first chamber has a first inlet and a first outlet, and the second chamber has a second inlet and a second outlet; The heat exchange tube bundle is provided in the third cavity to separate the third cavity into a shell-side flow channel and a tube-side flow channel, the shell-side flow channel has a third inlet and a third outlet, and the tube-side flow channel has a fourth inlet and a fourth outlet; The third inlet is used to connect to the regeneration tower, the third outlet is connected to the first inlet, the fourth inlet is connected to the second outlet, the fourth outlet is used to connect to the regeneration tower, and the first outlet and the second inlet are used to connect to the absorption tower; The lean liquid discharged from the regeneration tower flows into the first cavity from the first inlet after heat exchange through the shell-side flow channel; The rich liquid discharged from the absorption tower flows into the second chamber through the second inlet, and at least part of the rich liquid in the second chamber flows to the regeneration tower after heat exchange through the tube-side flow channel.

2. The lean and rich liquid tank integrated heat exchange device according to claim 1, characterized in that: The device further comprises a first plate, the first plate being arranged in the third cavity to divide the shell-side flow channel into a plurality of branch flow channels arranged side by side, wherein the plurality of branch flow channels are connected end to end in sequence; There are multiple groups of heat exchange tube bundles, and the multiple groups of heat exchange tube bundles are respectively arranged in the multiple branch channels, and the multiple groups of heat exchange tube bundles are connected in sequence end to end.

3. The lean and rich liquid tank integrated heat exchange device according to claim 2, characterized in that: The branch channel and the heat exchange tube bundle extend in the horizontal direction, at least two adjacent branch channels are arranged side by side in the vertical direction, and a converging shell is provided between the heat exchange tube bundle in the branch channel located above and the heat exchange tube bundle in the branch channel located below. The converging shell includes a first chamber and a second chamber, one of the first chamber and the second chamber is communicated with the heat exchange tube bundle in the branch channel located above, and the other is communicated with the heat exchange tube bundle in the branch channel located below, and a connecting channel is provided between the first chamber and the second chamber, and the flow area of ​​the connecting channel is smaller than the flow area of ​​the first chamber and the second chamber.

4. The lean and rich liquid tank integrated heat exchange device according to claim 3, characterized in that: It also includes a guide assembly, and a plurality of the guide assemblies are arranged at intervals in each branch channel along the extension direction of the heat exchange tube bundle. The guide assembly includes a plurality of parallel and spaced second plates, and the second plates are arranged at an angle relative to the extension direction of the heat exchange tube bundle.

5. The lean and rich liquid tank integrated heat exchange device according to claim 4, characterized in that: The upper end of the second plate is arranged to be tilted backward along the liquid flow direction in the branch channel, and the projections of the multiple second plates located in the same guide assembly in the vertical direction do not overlap, and the projections of the multiple second plates located in the same guide assembly in the extension direction of the heat exchange tube bundle do not overlap.

6. The lean and rich liquid tank integrated heat exchange device according to claim 5, characterized in that: Among the plurality of second plates in the same guide assembly, the distance between the projections of two adjacent second plates in the extension direction of the heat exchange tube bundle is 0 mm to 150 mm; And / or, among the plurality of second plates in the same guide assembly, the distance between the projections of two adjacent second plates in the vertical direction is 100-300 mm; and / or, the angle between the second plate and the extension direction of the heat exchange tube bundle is 30° to 55°; And / or, the number of the second plates located in the same guide assembly is 3 to 15.

7. The lean and rich liquid tank integrated heat exchange device according to claim 1, characterized in that: The tower body extends in a horizontal direction, the first outlet and the second inlet are arranged at one end of the tower body, and the third inlet and the fourth outlet are arranged at the other end of the tower body.

8. The lean and rich liquid tank integrated heat exchange device according to claim 1, characterized in that: The tower body includes a first shell, a second shell and a third shell. The first shell, the second shell and the third shell are arranged together from the outside to the inside. A first cavity is defined between the first shell and the second shell, a second cavity is defined between the second shell and the third shell, and the third shell defines a third cavity.

9. The lean and rich liquid tank integrated heat exchange device according to claim 1, characterized in that: It also includes a fourth shell and a cooling assembly, wherein a cooling cavity is formed between the fourth shell and the outer wall of the tower body, one end of the cooling cavity is connected to the atmosphere, and the other end of the cooling cavity is connected to the air outlet end of the cooling assembly; The cooling assembly includes a first fan and / or a second fan, the first fan includes a first fan blade and a first driver, the second fan includes a second fan blade and a driving impeller, and the driving impeller is arranged at the first inlet.

10. A carbon capture system, characterized in that: It comprises an absorption tower, a regeneration tower and a heat exchange device, wherein the heat exchange device is a lean and rich liquid tank integrated heat exchange device according to any one of claims 1 to 9; The rich liquid outlet of the absorption tower is connected to the second inlet of the lean and rich liquid tank integrated heat exchange device, and the lean liquid inlet of the absorption tower is connected to the first outlet of the lean and rich liquid tank integrated heat exchange device; The lean liquid outlet of the regeneration tower is connected to the third inlet of the lean and rich liquid tank integrated heat exchange device, and the rich liquid inlet of the regeneration tower is connected to the fourth outlet of the lean and rich liquid tank integrated heat exchange device.

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