Solar energy trapping system based on absorption tower and desorption tower

Abstract

The solar energy trapping system based on the absorption tower and the desorption tower comprises the absorption tower which is provided with a first inlet, a first outlet, a second inlet and a second outlet; the desorption tower is provided with a third inlet, a third outlet and a fifth outlet, the third inlet is communicated with the first outlet, the third outlet is located at the top of the desorption tower and used for discharging carbon dioxide gas, and the fifth outlet is communicated with the second inlet; the light gathering part is used for gathering sunlight, the sunlight gathered by the light gathering part faces the desorption tower and serves as a heat source of the desorption tower so that carbon dioxide gas can be discharged from rich liquid in the desorption tower, the light gathering part is arranged on at least one of the absorption tower and the solar energy installation frame, and the solar energy installation frame, the absorption tower and the desorption tower are arranged at intervals. Therefore, the solar energy trapping system based on the absorption tower and the desorption tower has the advantages of reducing energy consumption and saving energy.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide recovery, and particularly to a solar energy capture system based on an absorption tower and a desorption tower. Background Art

[0002] A desorption tower is a device widely used in the chemical industry, mainly used to recover or regenerate a solution that has absorbed certain components (such as acid gas, moisture, or other pollutants), so that these solutions can be recycled. The desorption tower requires heat energy for operation. A reboiler (also known as a reboiler) is a heating device mainly used to vaporize a liquid again in an industrial process. Its basic function is to transfer heat energy to the liquid entering it through heat exchange, causing partial evaporation of the liquid to form steam. This device is commonly found in the chemical industry and petroleum refining processes, especially when used in conjunction with a distillation column, heating the bottom liquid of the column to promote the volatile components to turn into steam and rise, thereby achieving the purpose of component separation. The structure of the reboiler is similar to that of a condenser, but its function is opposite, not to cool but to heat. It can be directly installed at the bottom of the distillation column or located outside the column and connected to the column through a siphon and a conduit. The heating medium can be steam, hot water, or other heat sources, selected according to specific process requirements. The design of the reboiler ensures effective heat transfer and often has a certain vaporization space to enable partial conversion of the liquid into steam. In the related art, the reboiler needs to consume steam to heat the rich liquid in the desorption tower, thereby improving the desorption and regeneration effect of the rich liquid, consuming a large amount of extraction steam, and having a large energy consumption. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, an embodiment of the present invention provides a solar energy capture system based on an absorption tower and a desorption tower.

[0004] The solar energy capture system based on an absorption tower and a desorption tower according to an embodiment of the present invention includes:

[0005] An absorption tower, the absorption tower having a first inlet, a first outlet, a second inlet, and a second outlet, the first outlet, the first inlet, the second inlet, and the second outlet being arranged in sequence from bottom to top, the first inlet being used for introducing a gas containing carbon dioxide, the first outlet being located at the top of the absorption tower and used for discharging the gas, and the second outlet being located at the bottom of the absorption tower and used for discharging the carbon dioxide-rich liquid;

[0006] A desorption tower, the desorption tower having a third inlet, a third outlet and a fifth outlet, the third inlet communicating with the first outlet, the third outlet being located at the top of the desorption tower and being used for discharging carbon dioxide gas, the fifth outlet communicating with the second inlet, the desorption tower and the absorption tower being oppositely arranged in a first horizontal direction, and the distance between the desorption tower and the absorption tower in the first horizontal direction being less than or equal to a first preset value;

[0007] A condensing member, the condensing member being used for concentrating sunlight, the sunlight concentrated by the condensing member facing the desorption tower and serving as a heat source for the desorption tower so that carbon dioxide gas is discharged from the rich liquid in the desorption tower, the condensing member being arranged on at least one of the absorption tower and the solar mounting frame, and the solar mounting frame being spaced apart from the absorption tower and the desorption tower.

[0008] Therefore, the solar energy capture system based on the absorption tower and the desorption tower according to the embodiments of the present invention has the advantages of reducing energy consumption and saving energy.

[0009] The solar energy capture system based on the absorption tower and the desorption tower according to the embodiments of the present invention includes a reboiler, the reboiler being used for heating the liquid in the first pipeline, the desorption tower having a fourth inlet and a fourth outlet, the inlet of the first pipeline communicating with the fourth outlet, the outlet of the first pipeline communicating with the fourth inlet, and a first pump body being arranged on the first pipeline.

[0010] The solar energy capture system based on the absorption tower and the desorption tower according to the embodiments of the present invention includes a heat collection part, the condensing member being used for concentrating light on the heat collection part so as to increase the temperature of the fluid in the heat collection part, the hot fluid discharged from the heat collection part can be introduced into the reboiler through a second pipeline, and the fluid discharged from the reboiler can be introduced into the heat collection part through a third pipeline.

[0011] In some embodiments, there are a plurality of the heat collection parts, and the plurality of heat collection parts are arranged at intervals in the circumferential direction on the circumferential side surface of the desorption tower;

[0012] At least one of the condensing members is arranged on the circumferential side surface of the absorption tower facing the desorption tower in the first horizontal direction, and the light concentration direction of the condensing member on the absorption tower faces the heat collection part on the circumferential side surface of the desorption tower.

[0013] In some embodiments, a plurality of the solar mounting frames are arranged on the circumferential side of the desorption tower, at least one of the condensing members is arranged on each solar mounting frame, and the light concentration direction of the condensing member on each solar mounting frame faces the heat collection part on the circumferential side surface of the desorption tower.

[0014] In some embodiments, the absorption tower and the solar mounting frame are connected to at least one of the condenser elements through an adjustment frame, and the adjustment frame can adjust the condensing direction of the condenser element connected thereto.

[0015] In some embodiments, there are a plurality of reboilers, and the plurality of reboilers are arranged around the circumferential side of the desorption tower, and each reboiler communicates with at least one of the heat collection parts.

[0016] In some embodiments, the condenser element includes at least one of a reflecting mirror and a lens;

[0017] The heat collection part includes at least one of a flat plate type heat collection tube and a vacuum tube type heat collection tube.

[0018] In some embodiments, the outer peripheral contour of the tower bodies of the absorption tower and the desorption tower is rectangular.

[0019] In some embodiments, the reboiler is communicated with a steam heat source through a sixth pipeline;

[0020] The first outlet is communicated with the inlet of the two-phase separator, the rich liquid outlet of the two-phase separator is communicated with the third inlet through a fourth pipeline, and the lean liquid outlet of the two-phase separator is communicated with the second inlet;

[0021] The fifth outlet is communicated with the second inlet through a fifth pipeline, the fifth pipeline and the fourth pipeline exchange heat through a heat exchanger, and a cooler is provided on the fifth pipeline, and the cooler is located between the second inlet and the heat exchanger. Description of the Drawings

[0022] Figure 1 is a schematic diagram of an absorption tower and a desorption tower according to an embodiment of the present invention.

[0023] Figure 2 is a schematic diagram of a solar energy capture system based on an absorption tower and a desorption tower according to an embodiment of the present invention.

[0024] Figure 3 is a top view of an absorption tower and a desorption tower according to an embodiment of the present invention.

[0025] Reference Signs:

[0026] 1. Absorption tower, 11. First inlet, 12. First outlet, 13. Second inlet, 14. Second outlet;

[0027] 2. Desorption tower, 21. Third inlet, 22. Third outlet, 23. Fourth inlet, 24. Fourth outlet, 25. Fifth outlet;

[0028] 3. Reboiler, 31. First pump body;

[0029] 4. Condensing element;

[0030] 5. Heat collection part;

[0031] 6. Two-phase separator;

[0032] 7. Heat exchanger;

[0033] 8. Cooler;

[0034] 91. First pipeline, 92. Second pipeline, 93. Third pipeline, 94. Fourth pipeline, 95. Fifth pipeline. Detailed implementation manner

[0035] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0036] The solar energy capture system based on an absorption tower and a desorption tower according to an embodiment of the present invention will be described below with reference to the drawings. As Figures 1 to 3 shown, the solar energy capture system based on an absorption tower and a desorption tower according to an embodiment of the present invention includes an absorption tower 1, a desorption tower 2, and a condensing element 4.

[0037] The absorption tower 1 has a first inlet 11, a first outlet 12, a second inlet 13, and a second outlet 14. The first outlet 12, the first inlet 11, the second inlet 13, and the second outlet 14 are arranged in sequence from bottom to top. The first inlet 11 is used for introducing a gas containing carbon dioxide. The first outlet 12 is located at the top of the absorption tower 1 and is used for discharging the gas. The second outlet 14 is located at the bottom of the absorption tower 1 and is used for discharging the carbon dioxide-rich liquid. The desorption tower 2 has a third inlet 21, a third outlet 22, and a fifth outlet 25. The third inlet 21 is communicated with the first outlet 12. The third outlet 22 is located at the top of the desorption tower 2 and is used for discharging carbon dioxide gas. The fifth outlet 25 is communicated with the second inlet 13. The desorption tower 2 and the absorption tower 1 are arranged opposite to each other in the first horizontal direction, and the distance between the desorption tower 2 and the absorption tower 1 in the first horizontal direction is less than or equal to a first preset value. Thus, a gas containing carbon dioxide can enter the absorption tower 1, and the gas after the absorption reaction is discharged from the second outlet 14 at the top of the absorption tower 1; the carbon dioxide-rich liquid formed after the absorption reaction is discharged from the first outlet 12 at the bottom of the absorption tower 1. The carbon dioxide-rich liquid discharged from the first outlet 12 can be introduced into the desorption tower 2 through the third inlet 21 to absorb heat and desorb carbon dioxide gas, and the carbon dioxide gas can be discharged from the third outlet 22 at the top of the desorption tower 2. The lean liquid discharged from the fifth outlet 25 at the bottom of the desorption tower 2 can be introduced into the absorption tower 1 again through the second inlet 13.

[0038] The light concentrator 4 is used to concentrate sunlight. The sunlight concentrated by the light concentrator 4 is directed towards the desorption tower 2 and serves as the heat source for the desorption tower 2, so that carbon dioxide gas is discharged from the rich liquid in the desorption tower 2. The light concentrator 4 is provided on at least one of the absorption tower 1 and the solar mounting rack, and the solar mounting rack is spaced apart from the absorption tower 1 and the desorption tower 2. Specifically, the solar mounting rack can be set on the open ground, and the light concentrator 4 can be set on the solar mounting rack. Alternatively, the light concentrator 4 can be set on the absorption tower 1, so as to use the sunlight concentrated by the light concentrator 4 as the heat source for the desorption tower 2, thereby reducing the thermal energy consumed by the desorption tower 2. Moreover, since the light concentrator 4 is provided on at least one of the absorption tower 1 and the solar mounting rack, the number of the light concentrators 4 can be increased to improve the available thermal energy and also reduce the floor space. The desorption tower 2 and the absorption tower 1 are oppositely arranged in the first horizontal direction, and the distance between the desorption tower 2 and the absorption tower 1 in the first horizontal direction is less than or equal to a first preset value, so as to facilitate the setting of the light concentrator 4 on the absorption tower 1 and facilitate the concentrated sunlight to irradiate on the tower body of the desorption tower 2.

[0039] The first horizontal direction can be the left-right direction, the up-down direction, the left-right direction and the front direction as shown by the arrows in the figure. For example, the sunlight concentrated by the light concentrator 4 can increase the temperature of the tower body of the desorption tower 2, so as to increase the temperature of the carbon dioxide-rich liquid in the desorption tower 2. The desorption tower 2 and the absorption tower 1 are oppositely arranged in the left-right direction, and the distance between the desorption tower 2 and the absorption tower 1 in the left-right direction is less than or equal to a first preset value.

[0040] Therefore, the solar energy capture system based on the absorption tower and the desorption tower according to the embodiment of the present invention has the advantages of reducing energy consumption and saving energy.

[0041] As Figure 2 shown, in some embodiments, the solar energy capture system based on the absorption tower and the desorption tower includes a reboiler 3. The reboiler 3 is used to heat the liquid in the first pipeline 91. The desorption tower 2 has a fourth inlet 23 and a fourth outlet 24. The inlet of the first pipeline 91 is communicated with the fourth outlet 24, and the outlet of the first pipeline 91 is communicated with the fourth inlet 23. A first pump body 31 is provided on the first pipeline 91. Specifically, the fifth outlet 25, the fourth outlet 24, the fourth inlet 23 and the third outlet 22 are arranged in sequence from bottom to top. The liquid in the desorption tower 2 is introduced into the first pipeline 91 and heated by the reboiler 3 to separate carbon dioxide, and then is introduced back into the desorption tower 2.

[0042] As Figures 1 to 3As shown, in some embodiments, in the solar energy collection part 5 of the solar energy collection system based on the absorption tower and the desorption tower, the concentrator 4 is used to concentrate light on the collection part 5 so as to increase the temperature of the fluid in the collection part 5. The hot fluid discharged from the collection part 5 can be introduced into the reboiler 3 through the second pipeline 92, and the fluid discharged from the reboiler 3 can be introduced into the collection part 5 through the third pipeline 93. Thus, the collection part 5 and the reboiler 3 can perform fluid circulation through the second pipeline 92 and the third pipeline 93, so that the hot fluid in the collection part 5 can provide a heat source for the reboiler 3. For example, pump bodies are provided on both the second pipeline 92 and the third pipeline 93. The fluid discharged from the reboiler 3 is introduced into a water tank, and the water in the water tank can be introduced into the collection part 5 through a pump body.

[0043] In some embodiments, the reboiler 3 is connected to a steam heat source through a sixth pipeline. Thus, when the collection part 5 cannot provide enough heat source, the steam in the steam heat source can be introduced into the reboiler 3 to provide enough heat for the reboiler 3.

[0044] As Figure 2 As shown, in some embodiments, the first outlet 12 is connected to the inlet of the two-phase separator 6. The rich liquid outlet of the two-phase separator 6 is connected to the third inlet 21 through the fourth pipeline 94, and the lean liquid outlet of the two-phase separator 6 is connected to the second inlet 13. The fifth outlet 25 is connected to the second inlet 13 through the fifth pipeline 95. The fifth pipeline 95 and the fourth pipeline 94 exchange heat through the heat exchanger 7. A cooler 8 is provided on the fifth pipeline 95, and the cooler 8 is located between the second inlet 13 and the heat exchanger 7. Thus, the rich liquid introduced into the fourth pipeline 94 from the rich liquid outlet of the two-phase separator 6 can be heated by the heat exchanger 7 to increase the temperature of the rich liquid introduced into the desorption tower 2, so as to facilitate the generation of carbon dioxide. The lean liquid introduced into the fifth pipeline 95 from the fifth outlet 25 can be cooled by the heat exchanger 7 and the cooler 8 in sequence, so that the lean liquid introduced into the absorption tower 1 is convenient for absorbing carbon dioxide.

[0045] As Figure 3 As shown, in some embodiments, there are multiple collection parts 5, and the multiple collection parts 5 are arranged at intervals in the circumferential direction on the circumferential side surface of the desorption tower 2. Thus, the multiple collection parts 5 on the circumferential side surface of the desorption tower 2 can all absorb sunlight to increase the temperature of the fluid therein.

[0046] The absorption tower 1 is provided with at least one concentrator 4 on the circumferential side surface facing the desorption tower 2 in the first horizontal direction, and the light concentration direction of the concentrator 4 on the absorption tower 1 faces the collection part 5 on the circumferential side surface of the desorption tower 2. The concentrator 4 on the absorption tower 1 can improve the heat absorption efficiency of the collection part 5 on the circumferential side surface of the desorption tower 2. For example, a plurality of concentrators 4 are provided on the right side surface of the absorption tower 1.

[0047] As Figure 3As shown, in some embodiments, the outer peripheral contours of the towers of the absorption tower 1 and the desorption tower 2 are rectangular. Thus, it is convenient to arrange the light concentrating element 4 on the outer peripheral side surface of the tower of the absorption tower 1, and it is convenient to arrange a plurality of heat collecting parts 5 on the outer peripheral side surface of the tower of the desorption tower 2. Each tower of the absorption tower 1 and the desorption tower 2 has a peripheral side surface perpendicular to the first horizontal direction and the second horizontal direction, the second horizontal direction is perpendicular to the first horizontal direction, and the second horizontal direction may be the front-back direction. For example, each tower of the absorption tower 1 and the desorption tower 2 has a peripheral side surface perpendicular to the front-back direction and the left-right direction. The desorption tower 2 is provided with heat collecting parts 5 on the peripheral side surfaces in the first horizontal direction and the second horizontal direction (the side surfaces in the left-right direction and the front-back direction).

[0048] As Figure 3 shown, in some embodiments, a plurality of solar mounting frames are arranged on the peripheral side of the desorption tower 2, at least one light concentrating element 4 is arranged on each solar mounting frame, and the light concentrating direction of the light concentrating element 4 on each solar mounting frame faces the heat collecting part 5 on the peripheral side surface of the desorption tower 2. The light concentrating element 4 on the solar mounting frame can improve the heat absorption efficiency of the heat collecting part 5 on the peripheral side surface of the desorption tower 2.

[0049] In some embodiments, the absorption tower 1 and the solar mounting frame are connected to at least one light concentrating element 4 through an adjusting frame, and the adjusting frame can adjust the light concentrating direction of the light concentrating element 4 connected thereto. Thus, the light concentrating direction of the light concentrating element 4 can be adjusted so as to direct the light concentrating direction towards the corresponding heat collecting part 5.

[0050] In some embodiments, there are a plurality of reboilers 3, and the plurality of reboilers 3 are arranged in a ring on the peripheral side of the desorption tower 2, and each reboiler 3 is communicated with at least one heat collecting part 5. Thus, the plurality of reboilers 3 can be communicated with the plurality of heat collecting parts 5, so that the plurality of heat collecting parts 5 respectively provide heat sources for the plurality of reboilers 3, and it is convenient for the heat collecting part 5 to be communicated with the reboiler 3.

[0051] In some embodiments, the light concentrating element 4 includes at least one of a reflector and a lens. For example, the light concentrating element 4 is a dish-shaped reflector. Alternatively, a combined light concentrating element (a component of a reflector and a lens) can be arranged on the solar mounting frame, and the lens is used for preliminary focusing first, and then further focused by the reflector to achieve a higher light concentration ratio.

[0052] In some embodiments, the heat collecting part 5 includes at least one of a flat plate type heat collecting tube and a vacuum tube type heat collecting tube. For example, the heat collecting part 5 is a flat plate type heat collecting tube to increase the heat receiving area.

[0053] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation to the present invention.

[0054] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0055] In the present invention, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0057] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0058] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Variations, modifications, substitutions, and alterations made by those of ordinary skill in the art to the above embodiments are all within the scope of protection of the present invention.

Claims

1. A solar energy collection system based on an absorption tower and a desorption tower, characterized in that: include: An absorption tower, the absorption tower having a first inlet, a first outlet, a second inlet and a second outlet, the first outlet, the first inlet, the second inlet and the second outlet are arranged in sequence from bottom to top, the first inlet is used to introduce a gas containing carbon dioxide, the first outlet is located at the top of the absorption tower and is used to discharge the gas, and the second outlet is located at the bottom of the absorption tower and is used to discharge a carbon dioxide-rich liquid; A desorption tower, wherein the desorption tower has a third inlet, a third outlet and a fifth outlet, the third inlet is connected to the first outlet, the third outlet is located at the top of the desorption tower and is used to discharge carbon dioxide gas, the fifth outlet is connected to the second inlet, the desorption tower and the absorption tower are arranged opposite to each other in a first horizontal direction, and the distance between the desorption tower and the absorption tower in the first horizontal direction is less than or equal to a first preset value; A concentrator is used to concentrate sunlight. The sunlight concentrated by the concentrator is directed toward the desorption tower and serves as a heat source for the desorption tower, so as to discharge carbon dioxide gas from the rich liquid in the desorption tower. The concentrator is arranged on at least one of the absorption tower and the solar mounting frame, and the solar mounting frame is spaced apart from the absorption tower and the desorption tower.

2. The solar energy collection system based on an absorption tower and a desorption tower according to claim 1, characterized in that: It includes a reboiler, which is used to heat the liquid in the first pipeline. The desorption tower has a fourth inlet and a fourth outlet. The inlet of the first pipeline is connected to the fourth outlet, the outlet of the first pipeline is connected to the fourth inlet, and the first pipeline is provided with a first pump body.

3. The solar energy collection system based on an absorption tower and a desorption tower according to claim 2, characterized in that: It includes a heat collecting part, and the focusing element is used to focus light on the heat collecting part so as to increase the temperature of the fluid in the heat collecting part. The hot fluid discharged from the heat collecting part can be passed into the reboiler through the second pipeline, and the fluid discharged from the reboiler can be passed into the heat collecting part through the third pipeline.

4. The solar energy collection system based on an absorption tower and a desorption tower according to claim 3, characterized in that: There are multiple heat collecting parts, and the multiple heat collecting parts are arranged on the peripheral side surface of the desorption tower at intervals along the circumferential direction; At least one light concentrator is provided on the peripheral side surface of the absorption tower facing the desorption tower in the first horizontal direction, and the focusing direction of the light concentrator on the absorption tower faces the heat collecting part on the peripheral side surface of the desorption tower.

5. The solar energy collection system based on an absorption tower and a desorption tower according to claim 4, characterized in that: A plurality of solar mounting frames are arranged on the peripheral side of the desorption tower, each of which is provided with at least one concentrator, and the concentrating direction of the concentrator on each solar mounting frame is toward the heat collecting part on the peripheral side of the desorption tower.

6. The solar energy collection system based on an absorption tower and a desorption tower according to claim 5, characterized in that: The absorption tower and the solar mounting frame are connected to at least one of the light concentrators via an adjustment frame, and the adjustment frame can adjust the focusing direction of the light concentrator connected thereto.

7. The solar energy collection system based on an absorption tower and a desorption tower according to claim 4, characterized in that: There are a plurality of reboilers, and the plurality of reboilers are arranged around the desorption tower, and each of the reboilers is connected to at least one of the heat collecting parts.

8. The solar energy collection system based on an absorption tower and a desorption tower according to claim 3, characterized in that: The light focusing element includes at least one of a reflector and a lens; The heat collecting part includes at least one of a flat plate heat collecting tube and a vacuum tube heat collecting tube.

9. The solar energy collection system based on an absorption tower and a desorption tower according to claim 1, characterized in that: The outer contours of the tower bodies of the absorption tower and the desorption tower are rectangular.

10. The solar energy collection system based on an absorption tower and a desorption tower according to claim 2, characterized in that: The reboiler is connected to the steam heat source through a sixth pipeline; The first outlet is communicated with the inlet of the two-phase separator, the rich liquid outlet of the two-phase separator is communicated with the third inlet through a fourth pipeline, and the lean liquid outlet of the two-phase separator is communicated with the second inlet; The fifth outlet is connected to the second inlet through a fifth pipeline. The fifth pipeline and the fourth pipeline exchange heat through a heat exchanger. A cooler is provided on the fifth pipeline, and the cooler is located between the second inlet and the heat exchanger.

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