CO2 analyzer and CO2 capture system

Abstract

Embodiments of the present application provide a CO2 stripping tower and a CO2 capture system. The CO2 stripping tower comprises a tower body, an insulation structure layer and a plurality of packing supports. The tower body has a cavity therein, and the tower body is provided with a rich liquid inlet, a lean liquid outlet and a gas phase outlet. The packing supports are arranged in the cavity, and the packing supports and the tower body define a plurality of packing chambers arranged at intervals along the height direction of the tower body and a stripping chamber below the most downstream packing chamber. The insulation structure layer comprises a packing insulation section and a stripping insulation section. The packing insulation section covers the outside of the packing chambers, and the stripping insulation section surrounds the outside of the stripping chamber. The stripping insulation section comprises a plurality of arc-shaped insulation plates arranged at intervals along the circumference of the tower body, and at least one of the arc-shaped insulation plates is arranged on the outside of the stripping chamber in an openable and closable manner. Therefore, the CO2 stripping tower according to the embodiments of the present application has the advantage of reducing the loss of absorbent.

Description

Technical Field

[0001] This invention relates to the field of carbon dioxide technology, and more specifically to a CO2 stripping tower and a CO2 capture system having the CO2 stripping tower. Background Technology

[0002] Carbon dioxide released from thermal power plants or boilers is absorbed by an absorption tower and then desorbed in a desorption tower after being heated, allowing the carbon dioxide to be separated from the absorbent. Desorption from the absorbent containing specific components (such as hydrogen sulfide and carbon dioxide) allows the absorbent to be regenerated and reused. Heating is required during the regeneration process; that is, the rich solution needs to reach a certain temperature during regeneration and desorption. To prevent heat loss, the desorption tower needs to be insulated.

[0003] In related technologies, a desorption tower generally includes a tower body and an insulation layer installed outside the tower body. The insulation layer helps maintain the desorption tower at a suitable desorption temperature. However, excessively high desorption temperatures can lead to increased volatility of the absorbent liquid. Large amounts of absorbent liquid volatilize, carrying away the CO2 that should have been desorbed, resulting in a decrease in CO2 recovery rate and significant loss of absorbent liquid. Furthermore, at high temperatures, unnecessary side reactions may occur between the absorbent liquid and other potentially present chemical substances. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a CO2 stripping tower. This CO2 stripping tower has the advantage of reducing absorbent loss while maintaining the desorption reaction in the stripping chamber at a constant temperature.

[0005] An embodiment of the present invention also proposes a CO2 capture system.

[0006] The CO2 stripping tower of this invention includes a tower body, an insulation layer, and multiple packing supports.

[0007] The tower body has chambers, and the tower body is provided with a rich liquid inlet, a lean liquid outlet, and a gas phase outlet. The packing support is disposed in the chambers, and the packing support and the tower body define multiple packing chambers spaced apart along the height direction of the tower body and an analysis chamber located below the downstream packing chamber. The lean liquid outlet is located below the analysis chamber, and the gas phase outlet is located above the upstream packing chamber. The thermal insulation structure layer includes a packing insulation section and an analysis insulation section. The packing insulation section covers the outside of the packing chamber, and the analysis insulation section surrounds the outside of the analysis chamber. The analysis insulation section includes multiple arc-shaped insulation plates spaced apart along the circumference of the tower body, and at least one arc-shaped insulation plate is closably disposed outside the analysis chamber.

[0008] The CO2 desorption tower of this invention divides the insulation structure layer into a packing insulation section and a desorption insulation section, with the packing insulation section covering the packing chamber. This facilitates segmented insulation of the packing insulation section and the desorption insulation section, providing high flexibility in temperature control. Simultaneously, the desorption insulation section is divided into multiple arc-shaped insulation plates spaced circumferentially along the tower body, with at least one arc-shaped insulation plate operablely on the outside of the desorption chamber. Furthermore, when the temperature inside the desorption chamber is suitable or too low, maintaining the arc-shaped insulation plate in contact with the tower body achieves insulation; when the temperature inside the desorption chamber is too high, controlling the arc-shaped insulation plate to detach from the tower body assists in cooling the desorption chamber. This ensures insulation during the heating process while also assisting in cooling. Furthermore, it avoids the problems of excessively high temperatures inside the desorption tower leading to byproduct generation and high adsorbent loss. Therefore, the CO2 desorption tower of this invention achieves insulation while also helping to reduce adsorbent loss.

[0009] Therefore, the CO2 desorption tower of this embodiment of the invention has the advantage of reducing absorbent loss while maintaining the desorption reaction in the desorption chamber through heat preservation.

[0010] In some embodiments, a portion of the plurality of arc-shaped insulation panels is an arc-shaped fixed plate, and another portion of the plurality of arc-shaped insulation panels is an arc-shaped movable plate. The arc-shaped fixed plate has a pipe interface communicating with the analysis chamber. The arc-shaped movable plate is closably disposed on the outside of the tower body. The arc-shaped movable plate includes an arc-shaped insulation panel and an opening and closing drive component. One circumferential end of the arc-shaped insulation panel is hinged to the tower body, and the other circumferential end of the arc-shaped insulation panel is hinged to one end of the opening and closing drive component. The other end of the opening and closing drive component is hinged to the tower body. A sliding groove is formed on the lower side frame of the arc-shaped movable plate. The upper end of the opening and closing drive component is disposed in the sliding groove and can slide along the sliding groove so as to realize the opening and closing of the arc-shaped insulation panel when the opening and closing drive component extends and retracts.

[0011] In some embodiments, the arc-shaped fixing plate is bonded to the outer wall of the tower body, and the arc-shaped movable plate includes a rigid panel layer, a frame and an insulation layer. The frame and the insulation layer are matched with the outer wall of the tower body. The frame surrounds the rigid panel layer and forms a positioning cavity with the rigid panel layer. The insulation layer is embedded in the positioning cavity.

[0012] In some embodiments, the insulation layer includes a reflective layer, a nano-coating layer, and a heat-insulating cotton layer arranged sequentially from the inside to the outside, with the nano-coating layer and the reflective surface of the reflective layer being disposed opposite to each other.

[0013] In some embodiments, the rigid panel layer is a magnetic plate.

[0014] In some embodiments, the packing insulation section has multiple segments, which are spaced apart along the height direction of the tower body and cover the outside of the tower body. Each of the packing insulation segments includes a protective shell layer, a packing insulation layer, a clamping ring, and a support member. The protective shell layer is disposed outside the packing insulation layer, and the support member is disposed between two adjacent packing insulation layers. The lower end face of the protective shell layer and the packing insulation layer abuts against the support member corresponding to the packing insulation segment. The packing insulation layer is bonded to the outer wall surface of the tower body, and the clamping ring is clamped outside the packing insulation layer.

[0015] In some embodiments, the CO2 stripping tower further includes an overpass filtrate cover and a first refrigeration pipe, the overpass filtrate cover being disposed above the uppermost packing chamber, and the first refrigeration pipe being laid on the overpass filtrate cover.

[0016] In some embodiments, the CO2 stripping tower further includes a plurality of heat transfer tubes and a reheater. Each of the packing chambers is provided with a heat transfer tube, and each heat transfer tube is provided in a one-to-one correspondence in each of the packing chambers. The heat transfer tubes in each of the packing chambers are connected in series in the counter-current direction along the flow direction of the absorbent liquid in the tower body. The reheater is capable of exchanging heat with the heat transfer tubes.

[0017] In some embodiments, the heat transfer pipes in the downstream packing chamber are connected to the lean liquid outlet, while the heat transfer pipes in the upstream packing chamber are connected to the outside.

[0018] In some embodiments, the heat transfer fitting includes a manifold, a plurality of main pipes and a plurality of branch pipes, the main pipes and the plurality of branch pipes being crisscrossed in the packing chamber, the lean liquid outlet being connected to the plurality of main pipes through the manifold, each of the branch pipes being connected to the main pipes, each of the main pipes extending along the extension direction of the packing support, each of the branch pipes extending along the height direction of the tower body in the packing chamber, and the plurality of branch pipes defining the packing compartments with the packing support and / or the tower body.

[0019] The CO2 capture system of this invention includes an absorption tower and a CO2 desorption tower according to any one of the above-mentioned methods, wherein the absorption tower is in cyclic communication with the tower body. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the CO2 stripping tower according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the lower part of the CO2 stripping tower according to an embodiment of the present invention.

[0022] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.

[0023] Figure 4 This is a schematic diagram of the upper part of the CO2 stripping tower according to an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the arc-shaped movable plate according to an embodiment of the present invention.

[0025] Figure label:

[0026] CO2 stripping tower 100;

[0027] Tower body 1; Rich liquor inlet 11; Lean liquor outlet 12; Gas phase outlet 13; Packing chamber 14; Desorption chamber 15;

[0028] Packing support 2;

[0029] 31; 311; 312; 313; 314; 315;

[0030] Analysis of the insulation section 32; the arc-shaped fixed plate 321; the arc-shaped movable plate 322; and the opening and closing drive component 323;

[0031] Rigid panel layer 3221; frame 3222; insulation layer 3223; sliding groove 3224;

[0032] 4. Filter cover for refrigerated liquid; 5. First refrigeration pipe fitting;

[0033] Heat transfer fittings 7; manifolds 71; main pipes 72; branch pipes 73;

[0034] Reheater 8. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] The following is for reference. Figures 1-5 The CO2 desorption tower 100 and CO2 capture system of embodiments of the present invention are described.

[0037] The CO2 stripping tower 100 of this embodiment of the invention includes a tower body 1, a thermal insulation structure layer and multiple packing supports 2.

[0038] The tower body 1 has a chamber. The tower body 1 is equipped with a rich liquid inlet 11, a lean liquid outlet 12, and a gas phase outlet 13. A packing support 2 is disposed within the chamber, and the packing support 2 and the tower body 1 define multiple packing chambers 14 spaced apart along the height direction of the tower body 1, and an analysis chamber 15 located below the downstream packing chamber 14. The lean liquid outlet 12 is located below the analysis chamber 15, and the gas phase outlet 13 is located above the upstream packing chamber 14. The insulation structure layer includes a packing insulation section 31 and an analysis insulation section 32. The packing insulation section 31 covers the outside of the packing chamber 14, and the analysis insulation section 32 surrounds the analysis chamber 15. The analysis insulation section 32 includes multiple arc-shaped insulation plates spaced apart along the circumference of the tower body 1. At least one arc-shaped insulation plate is closable and disposed outside the analysis chamber 15. In other words, there are multiple packing chambers 14 along the height of the tower body 1, and the analysis chamber 15 is located below the downstream packing chamber 14.

[0039] The CO2 desorption tower 100 of this invention divides the insulation structure layer into a packing insulation section 31 and a desorption insulation section 32, with the packing insulation section 31 covering the outside of the packing chamber 14. Because the total height of the CO2 desorption tower 100 is relatively high (sometimes exceeding 30 meters), segmented insulation of the packing insulation section 31 and the desorption insulation section 32 provides good layout flexibility. Simultaneously, the desorption insulation section 32 is divided into multiple arc-shaped insulation plates spaced circumferentially along the tower body 1. At least one arc-shaped insulation plate is detachable and can be opened and closed on the outside of the desorption chamber 15. When the temperature inside the desorption chamber 15 is suitable or too low, the arc-shaped insulation plate remains in contact with the tower body 1 to achieve insulation; when the temperature inside the desorption chamber 15 is too high, the arc-shaped insulation plate is detached from the tower body 1 to assist in cooling the desorption chamber 15. This ensures insulation during the heating process while also assisting in cooling. Furthermore, it avoids the problems of excessively high temperatures inside the desorption tower 100 leading to the generation of by-products and high adsorbent loss. Therefore, the CO2 desorption tower 100 of this embodiment of the invention not only achieves heat preservation, but also helps to reduce the loss of adsorbent.

[0040] Furthermore, the CO2 desorption tower 100 of this embodiment of the invention forms multiple packing chambers 14 by arranging multiple packing supports 2 spaced apart along its height direction inside the tower body 1. Each packing chamber 14 is provided with a packing layer, which provides a huge specific surface area, facilitating more thorough contact between the gas and liquid phases. By stacking the packing layers through multiple packing chambers 14, the gas and liquid undergo multi-stage contact within the tower body 1, which can enhance the mass and heat transfer process between the gas and liquid phases.

[0041] Therefore, the CO2 desorption tower 100 of this embodiment of the invention has the advantage of reducing absorbent loss while maintaining the desorption reaction in the desorption chamber 15.

[0042] Optionally, there can be multiple rich liquid inlets 11, with each packing chamber 14 corresponding to a rich liquid inlet 11.

[0043] Alternatively, the packing layer may be composed of perforated metal corrugated packing; the packing layer may also be composed of stainless steel wire mesh or rings.

[0044] like Figure 2 and Figure 3 As shown, one part of the multiple arc-shaped insulation panels is an arc-shaped fixed plate 321, and another part of the multiple arc-shaped insulation panels is an arc-shaped movable plate 322. The arc-shaped fixed plate 321 has a pipe interface communicating with the analysis chamber 15. The arc-shaped movable plate 322 is closably arranged on the outside of the tower body 1. The arc-shaped movable plate 322 includes an arc-shaped insulation plate and an opening and closing drive component 323. One circumferential end of the arc-shaped insulation plate is hinged to the tower body 1, and the other circumferential end of the arc-shaped insulation plate is hinged to one end of the opening and closing drive component 323. The other end of the opening and closing drive component 323 is hinged to the tower body 1. A sliding groove 3224 is opened on the lower side frame 3222 of the arc-shaped movable plate 322. The upper end of the opening and closing drive component 323 is arranged in the sliding groove 3224 and can slide along the sliding groove 3224 so as to realize the opening and closing of the arc-shaped insulation plate when the opening and closing drive component 323 extends and retracts.

[0045] The CO2 desorption tower 100 of this embodiment includes a desorption insulation section 32 comprising an arc-shaped fixed plate 321 and an arc-shaped movable plate 322 arranged sequentially along the circumference of the tower body 1. The arc-shaped fixed plate 321 has a pipe interface communicating with the desorption chamber 15, which does not affect the minimum area for pipe installation and facilitates the fixing of the interface. In addition, the arc-shaped movable plate 322 is divided into an arc-shaped insulation plate and an opening and closing drive component 323. One circumferential end of the arc-shaped insulation plate is hinged to the tower body 1, and the other circumferential end of the arc-shaped insulation plate is hinged to one end of the opening and closing drive component 323. The other end of the opening and closing drive component 323 is hinged to the tower body 1. A sliding groove 3224 is formed on the lower side frame 3222 of the arc-shaped movable plate 322. The upper end of the opening and closing drive component 323 is disposed in the sliding groove 3224 and can slide along the sliding groove 3224 so as to realize the opening and closing of the arc-shaped insulation plate when the opening and closing drive component 323 extends and retracts. Therefore, the CO2 stripping tower 100 of this embodiment of the invention has the advantage of simple structure.

[0046] like Figure 2 , Figure 3 and Figure 5 As shown, the arc-shaped fixed plate 321 is bonded to the outer wall of the tower body 1. The arc-shaped movable plate 322 includes a rigid panel layer 3221, a frame 3222, and an insulation layer 3223. The frame 3222 and the insulation layer 3223 are both matched with the outer wall of the tower body 1. The frame 3222 surrounds the rigid panel layer 3221, and the frame 3222 and the rigid panel layer 3221 form a positioning cavity. The insulation layer 3223 is embedded in the positioning cavity.

[0047] The CO2 desorption tower 100 of this embodiment of the invention divides the arc-shaped movable plate 322 into a rigid panel layer 3221, a frame 3222, and an insulation layer 3223. Both the frame 3222 and the insulation layer 3223 are matched to the outer wall surface of the tower body 1. The frame 3222 surrounds the rigid panel layer 3221, and the frame 3222 and the rigid panel layer 3221 form a positioning cavity, within which the insulation layer 3223 is embedded. This helps to improve the structural stability of the insulation layer 3223 and avoids the problem of the insulation layer 3223 cracking and affecting the overall insulation performance.

[0048] Furthermore, the insulation layer 3223 includes a reflective layer, a nano-coating layer, and a heat-insulating cotton layer arranged sequentially from the inside to the outside, with the nano-coating layer and the reflective surface of the reflective layer facing each other.

[0049] The CO2 desorption tower 100 of this embodiment of the invention comprises a reflective layer, a nano-coating layer, and a heat-insulating cotton layer arranged sequentially from the inside to the outside of the insulation layer 3223. The reflective layer serves as an external protective layer, reducing heat loss; the nano-coating layer further reduces the conduction of residual heat; and the heat-insulating cotton layer prevents internal heat loss, restricts heat exchange between the solid and gas, and locks in heat to avoid heat loss. Therefore, the CO2 desorption tower 100 of this embodiment of the invention has the advantage of good heat preservation.

[0050] Alternatively, the reflective layer can be an aluminum foil layer.

[0051] The rigid panel layer 3221 can be a magnetic plate, which can generate a strong magnetic force to be adsorbed onto the iron or magnetic material surface of the tower body 1.

[0052] Alternatively, the magnet plate can be neodymium iron boron (NdFeB).

[0053] Optionally, the insulation layer 3223 also includes a moisture-proof layer and a protective layer, with the moisture-proof layer disposed outside the insulation layer.

[0054] like Figure 1 and Figure 2 As shown, the packing insulation section 31 has multiple segments, which are spaced apart along the height direction of the tower body 1 and cover the outside of the tower body 1. Each packing insulation section 31 includes a protective shell layer 311, a packing insulation layer 312, a clamping ring 313, and a support member 314. The protective shell layer 311 is disposed outside the packing insulation layer 312, and the support member 314 is disposed between two adjacent packing insulation layers 312. The lower end face of the protective shell layer 311 and the packing insulation layer 312 abuts against the support member 314 corresponding to the packing insulation section 31. The packing insulation layer 312 is bonded to the outer wall surface of the tower body 1, and the clamping ring 313 is clamped to the outside of the packing insulation layer 312.

[0055] The CO2 desorption tower 100 of this embodiment of the invention divides the packing insulation section 31 into a protective shell layer 311, a packing insulation layer 312, a clamping ring 313, and a support member 314. The support member 314 can support the protective shell layer 311 and the packing insulation layer 312, thus preventing the insulation layer from falling off. In addition, the clamping ring 313 can further fix the packing insulation layer 312, further preventing the insulation layer from detaching from the tower body 1. Therefore, the CO2 desorption tower 100 of this embodiment of the invention improves the overall structural stability.

[0056] Optionally, there can be multiple clamping rings 313, which are spaced apart along the height direction of the tower body 1. Further, the clamping rings 313 are tension wires.

[0057] Optionally, the support member 314 includes a plurality of supports distributed in a circle and an arc-shaped plate connected to the fabrication, the plurality of arc-shaped plates forming an annular support ring.

[0058] like Figure 4 As shown, the CO2 desorption tower 100 of this embodiment of the invention also includes an overgas filtrate cover 4 and a first refrigeration pipe 5. The overgas filtrate cover 4 is disposed above the uppermost packing chamber 14, and the first refrigeration pipe 5 is laid on the overgas filtrate cover 4.

[0059] The CO2 desorption tower 100 of this embodiment of the invention, by providing an overpass filtrate cover 4 and a first refrigeration pipe 5, allows the desorbed CO2, carrying some of the vaporized adsorbent at high temperatures, to be blocked by the overpass filtrate cover 4 and fall into the packing chamber 14, reducing absorbent loss. Furthermore, the first refrigeration pipe 5, installed on the overpass filtrate cover 4, further cools the gas emitted from the desorption tower 100, promoting the condensation of the vaporized adsorbent in the desorbed CO2 emission gas into small droplets, which then converge on the overpass filtrate cover 4 and flow back into the packing chamber 14, further reducing absorbent loss. Therefore, the CO2 desorption tower 100 of this embodiment of the invention has the advantage of reducing absorbent loss.

[0060] In some embodiments, the vented filtrate cover 4 includes a cover body and a venting layer. The cover body has a domed top, and a first refrigeration pipe 5 is sandwiched between the venting layer and the cover body. The cover body has a plurality of vent holes.

[0061] like Figure 1 and Figure 2 As shown, the CO2 desorption tower 100 of this embodiment of the invention also includes a plurality of heat transfer tubes 7 and a reheater 8. Each packing chamber 14 is provided with a heat transfer tube 7, and each heat transfer tube 7 is arranged in a one-to-one correspondence in each packing chamber 14. The heat transfer tubes 7 in each packing chamber 14 are arranged in series in the opposite direction to the flow direction of the absorbent liquid in the tower body 1. The reheater 8 can exchange heat with the heat transfer tubes 7.

[0062] The CO2 desorption tower 100 of this embodiment of the invention, through the addition of heat transfer tubes 7 and reheaters 8, with each heat transfer tube 7 correspondingly arranged in each packing chamber 14, achieves direct heat exchange between the rich liquid and the heat transfer tubes 7 (i.e., changing from indirect heat exchange to direct contact heat exchange), thereby maintaining the absorbent at a relatively high temperature. Therefore, the CO2 desorption tower 100 of this embodiment of the invention helps to improve the gas-liquid mass transfer effect and enhances the desorption efficiency.

[0063] In addition, the heat transfer tubes 7 in each packing chamber 14 are connected in series in the opposite direction to the flow of the absorbent liquid in the tower body 1, which can reduce heat loss with a small temperature difference and help reduce energy consumption.

[0064] Furthermore, the reheater 8 can also be connected to the power plant's flue gas outlet to heat the flue gas in the desorption tower using the high-temperature flue gas discharged from the power plant.

[0065] like Figure 1 and Figure 2 As shown, the heat transfer tube 7 in the downstream packing chamber 14 is connected to the lean liquid outlet 12, and the heat transfer tube 7 in the upstream packing chamber 14 is connected to the outside.

[0066] The CO2 desorption tower 100 of this embodiment connects the heat transfer pipes 7 in the downstream packed chamber 14 to the lean liquor outlet 12. This allows the heat stored in the lean liquor outlet 12 to be utilized by the packing layer in the upper packed chamber 14, promoting heat exchange in the rich liquor. This can partially or even completely replace traditional steam heating, thus avoiding the consumption of high-value superheated steam and significantly reducing the CO2 desorption cost of coal-fired power plants. In other words, it can fully utilize the heat contained in the regenerated gas to preheat the rich liquor, thereby reducing energy consumption during the rich liquor desorption process. This reduces capture costs and steam consumption.

[0067] like Figure 1 and Figure 2 As shown, the heat transfer pipe fitting 7 includes a manifold 71, multiple main pipes 72 and multiple branch pipes 73. The main pipes 72 and multiple branch pipes 73 are arranged in a crisscross pattern within the packing chamber 14. The lean liquid outlet 12 is connected to the multiple main pipes 72 through the manifold 71. Each branch pipe 73 is connected to a main pipe 72. Each main pipe 72 extends along the extension direction of the packing support 2. Each branch pipe 73 extends into the packing chamber along the height direction of the tower body 1. The multiple branch pipes 73, together with the packing support 2 and / or the tower body 1, define the packing compartments.

[0068] Understandably, multiple main pipes 72 extend along the extension direction of the packing support 2 to define the packing compartment, which can achieve heating of the bottom of the packing layer in the corresponding analysis chamber 15. Multiple branch pipes 73 extend along the height direction of the tower body 1, which can heat the side of the packing layer in the corresponding analysis chamber 15.

[0069] The CO2 desorption tower 100 of this embodiment of the invention divides the heating assembly into a manifold 71, multiple main pipes 72, and multiple branch pipes 73. The multiple main pipes 72 extend along the extension direction of the packing support 2, and the multiple branch pipes 73 extend along the height direction of the tower body 1. This achieves heat exchange at the bottom edge and multiple sides of the packing layer, not only improving heat exchange efficiency but also contributing to improved uniformity of the absorbent temperature. Therefore, the CO2 desorption tower 100 of this embodiment of the invention helps to further improve CO2 desorption efficiency.

[0070] Furthermore, multiple main pipes 72 extend along a direction perpendicular to the height of the tower body 1, and multiple branch pipes 73 can be regularly arranged to form multiple packing compartments with triangular, square, or rectangular structures. That is, multiple branch pipes 73 can be arranged inside the desorption chamber 15 and sandwiched between adjacent packing layers, allowing for timely heating of the packing layers. Therefore, the CO2 desorption tower 100 of this embodiment of the invention significantly improves heat exchange efficiency.

[0071] The CO2 capture system of this invention includes an absorption tower and a CO2 desorption tower 100 according to any one of the above, wherein the absorption tower is circulatedly connected to the tower body 1.

[0072] Therefore, the CO2 capture system of this embodiment of the invention has the advantage of reducing absorbent loss while maintaining the desorption reaction in the desorption chamber 15.

[0073] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0074] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A CO2 stripping tower, characterized in that, include: The tower body is supported by multiple packing materials. The tower body has chambers and is provided with a rich liquid inlet, a lean liquid outlet and a gas phase outlet. The packing materials are arranged in the chambers and the packing materials and the tower body define multiple packing chambers spaced apart along the height direction of the tower body and an analysis chamber located below the downstream packing chamber. The lean liquid outlet is located below the analysis chamber and the gas phase outlet is located above the upstream packing chamber. and The insulation structure layer includes a filler insulation section and a desorption insulation section. The filler insulation section covers the outside of the filler chamber and has multiple segments. The multiple filler insulation segments are spaced apart along the height direction of the tower body and cover the outside of the tower body. The desorption insulation section is arranged outside the desorption chamber and includes multiple arc-shaped insulation plates spaced apart along the circumference of the tower body. At least one of the arc-shaped insulation plates is openable and closable on the outside of the desorption chamber. Multiple heat transfer tubes and reheaters are provided. Each of the packing chambers is equipped with a heat transfer tube, and each heat transfer tube is arranged in a one-to-one correspondence in each of the packing chambers. The heat transfer tubes in each packing chamber are arranged in series in the opposite direction to the flow of the absorbent liquid in the tower. The reheater can exchange heat with the heat transfer tubes. The heat transfer tube in the downstream packing chamber is connected to the lean liquid outlet, and the heat transfer tube in the upstream packing chamber can be connected to the outside. The heat transfer pipe fitting includes a manifold, multiple main pipes, and multiple branch pipes. The main pipes and multiple branch pipes are crisscrossed in the packing chamber. The lean liquid outlet is connected to the multiple main pipes through the manifold. Each branch pipe is connected to a main pipe. Each main pipe extends along the extension direction of the packing support. Each branch pipe extends along the height direction of the tower body in the packing chamber. The multiple branch pipes, together with the packing support and / or the tower body, define the packing compartments.

2. The CO2 stripping tower according to claim 1, characterized in that, A portion of the multiple arc-shaped insulation panels is an arc-shaped fixed plate, and another portion of the multiple arc-shaped insulation panels is an arc-shaped movable plate. The arc-shaped fixed plate has a pipe interface communicating with the analysis chamber. The arc-shaped movable plate is closably disposed on the outside of the tower body. The arc-shaped movable plate includes an arc-shaped insulation panel and an opening and closing drive component. One circumferential end of the arc-shaped insulation panel is hinged to the tower body, and the other circumferential end of the arc-shaped insulation panel is hinged to one end of the opening and closing drive component. The other end of the opening and closing drive component is hinged to the tower body. A sliding groove is formed on the lower side frame of the arc-shaped movable plate. The upper end of the opening and closing drive component is disposed in the sliding groove and can slide along the sliding groove so as to realize the opening and closing of the arc-shaped insulation panel when the opening and closing drive component extends and retracts.

3. The CO2 stripping tower according to claim 2, characterized in that, The arc-shaped fixed plate is bonded to the outer wall of the tower body. The arc-shaped movable plate includes a rigid panel layer, a frame and an insulation layer. The frame and the insulation layer are matched with the outer wall of the tower body. The frame surrounds the rigid panel layer and forms a positioning cavity with the rigid panel layer. The insulation layer is embedded in the positioning cavity.

4. The CO2 stripping tower according to claim 3, characterized in that, The insulation layer includes a reflective layer, a nano-coating layer, and a heat insulation cotton layer arranged sequentially from the inside to the outside, with the nano-coating layer and the reflective surface of the reflective layer facing each other; And / or, the rigid panel layer is a magnetic plate.

5. The CO2 stripping tower according to claim 1, characterized in that, Each of the aforementioned packing insulation sections includes a protective shell layer, a packing insulation layer, a clamping ring, and a support member. The protective shell layer is disposed outside the packing insulation layer, and the support member is disposed between two adjacent packing insulation layers. The lower end faces of the protective shell layer and the packing insulation layer abut against the support member corresponding to the packing insulation section. The packing insulation layer is bonded to the outer wall of the tower body, and the clamping ring is clamped outside the packing insulation layer.

6. The CO2 stripping tower according to claim 1, characterized in that, It also includes a vented filtrate cover and a first refrigeration pipe, wherein the vented filtrate cover is disposed above the uppermost packing chamber, and the first refrigeration pipe is laid on the vented filtrate cover.

7. A CO2 capture system, characterized in that, It includes an absorption tower and a CO2 desorption tower according to any one of claims 1-6, wherein the absorption tower is in cyclic communication with the tower body.

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