Regeneration device and flue gas decarbonization system

Abstract

The invention relates to a regeneration device and a flue gas decarburization system. The regeneration device comprises a regeneration tower, a first liquid inlet and a first exhaust port, wherein the regeneration tower is provided with a regeneration cavity, and the first liquid inlet and the first exhaust port communicate with the regeneration cavity; the heating assembly comprises a first heat exchanger and a heat collector, the first heat exchanger comprises a first heat exchange cavity, a first transmission pipe and a second transmission pipe, the first transmission pipe is located in the first heat exchange cavity, and a liquid inlet of the first transmission pipe and a liquid outlet of the first transmission pipe both communicate with the regeneration cavity; heat exchange liquid is contained in the second transmission pipe, the second transmission pipe is located in the first heat exchange cavity, and a liquid inlet of the second transmission pipe communicates with a liquid outlet of the second transmission pipe; the heat collector comprises a reflective mirror and a heat collecting pipe, and the reflective mirror reflects sunlight and gathers the sunlight to the pipe wall of the heat collecting pipe so as to heat a heating medium in the heat collecting pipe; heat of the heating medium is configured to radiate to the second transfer tube. In conclusion, according to the regeneration device in the embodiment, heat for heating the rich liquid entering the regeneration tower comes from the heat collector, and normal power generation of a power plant cannot be affected.

Description

Technical Field

[0001] The present application relates to the technical field of carbon dioxide capture, and in particular to a regeneration device and a flue gas decarbonization system. Background Art

[0002] Carbon dioxide is the main factor in climate warming, and large-scale combustion equipment is the largest source of carbon dioxide emissions. If we want to control carbon dioxide emissions on a large scale and respond to climate warming, we need to capture carbon dioxide from large-scale combustion equipment.

[0003] In the existing technology, absorption, distillation, adsorption, membrane separation and other methods are used to separate carbon dioxide from carbon dioxide emission sources such as combustion flue gas or industrial waste gas. The absorption method generally uses an aqueous solution containing amines, ammonia, potassium carbonate or the like to contact a mixed gas containing carbon dioxide to selectively separate carbon dioxide. When the absorption method is working, the flue gas is cooled, dust-removed, and subjected to deep desulfurization and denitrification processes in a pretreatment tower. It is then transferred to an absorption tower and contacted with the absorption liquid sprayed in the absorption tower. During this process, the carbon dioxide in the flue gas is absorbed by the absorption liquid, and the decarbonized flue gas is discharged into the atmosphere through the top of the absorption tower. The absorption liquid after absorbing carbon dioxide is called rich liquid. The rich liquid gathers at the bottom of the absorption tower, is heated by a lean-rich liquid heat exchanger, and is then transferred to a desorption tower. The rich liquid entering the desorption tower is reheated by the steam generated by the reboiler installed at the bottom of the desorption tower to complete the decarbonization and return to absorption liquid. The carbon dioxide separated from the rich liquid is finally discharged from the top of the desorption tower.

[0004] In related technologies, the steam generated by the reboiler comes from the low-pressure cylinder in the power plant. The steam in the low-pressure cylinder is limited. When an absorption liquid is used to absorb more carbon dioxide from the flue gas, excessive steam consumption may affect the normal operation of the low-pressure cylinder, resulting in the power plant being unable to generate electricity normally. Summary of the Invention

[0005] Based on this, it is necessary to propose a regeneration device and flue gas decarbonization system in view of the fact that when the absorption liquid is currently used to absorb more carbon dioxide from the flue gas, the excessive steam consumption may affect the normal operation of the low-pressure cylinder, resulting in the power plant being unable to generate electricity normally.

[0006] A regeneration device comprising:

[0007] A regeneration tower having a regeneration chamber, and a first liquid inlet and a first exhaust port communicated with the regeneration chamber;

[0008] a heating assembly, connected to the regeneration chamber, comprising a first heat exchanger and a heat collector arranged opposite to each other, the first heat exchanger comprising a first heat exchange chamber, a first transmission pipe, and a second transmission pipe, the first transmission pipe being partially located in the first heat exchange chamber, the liquid inlet of the first transmission pipe and the liquid outlet of the first transmission pipe both being connected to the regeneration chamber; the second transmission pipe containing heat exchange fluid, the second transmission pipe being partially located in the first heat exchange chamber, the liquid inlet of the second transmission pipe being connected to the liquid outlet of the second transmission pipe;

[0009] The collector includes at least one reflector and a heat collecting tube. The reflector is configured to reflect sunlight and converge the reflected sunlight to the tube wall of the heat collecting tube to heat the heating medium in the heat collecting tube; the heat of the heating medium is configured to radiate to the second transmission tube to heat the heat exchange fluid in the second transmission tube.

[0010] In one embodiment, the heating assembly includes a heater, and the heater is located between the first heat exchanger and the heat collector;

[0011] The heater includes a heating chamber, a third transmission tube and a heating tube located in the heating chamber, the liquid inlet of the third transmission tube is connected to the liquid outlet of the second transmission tube, and the liquid outlet of the third transmission tube is connected to the liquid inlet of the second transmission tube; the inlet of the heating tube is connected to the outlet of the heat collecting tube, and the outlet of the heating tube is connected to the inlet of the heat collecting tube.

[0012] In one embodiment, the heat collector includes a plurality of the reflectors and a plurality of the heat collecting tubes;

[0013] The plurality of heat collecting tubes are arranged corresponding to the plurality of reflectors, and at least one reflector is provided on the outer periphery of each heat collecting tube.

[0014] In one embodiment, a plurality of reflectors are provided on the outer periphery of each heat collecting tube, and the plurality of reflectors corresponding to each heat collecting tube are configured to be arranged at intervals along the extension direction of the heat collecting tube.

[0015] In one embodiment, the heat collector includes a first storage tank and a first pump body;

[0016] The first storage tank contains the heating medium, the inlet of the first storage tank is connected to the outlet of the heating pipe, the outlet of the first storage tank is connected to the inlet of the first pump body, and the outlet of the first pump body is connected to the inlet of the heat collecting pipe.

[0017] In one embodiment, the heat collector includes a second storage tank and a second pump body;

[0018] The inlet of the second storage tank is communicated with the outlet of the heat collecting pipe, the outlet of the second storage tank is communicated with the inlet of the second pump body, and the outlet of the second pump body is communicated with the inlet of the heating pipe.

[0019] In the regeneration device of this embodiment, after the absorption liquid absorbs the carbon dioxide in the flue gas and becomes rich liquid, it enters the regeneration chamber of the regeneration tower through the first liquid inlet, and the rich liquid entering the regeneration chamber leaves the regeneration chamber through the liquid inlet of the first transmission pipe in the first heat exchanger and enters the first transmission pipe; and leaves the first transmission pipe from the liquid outlet and returns to the regeneration chamber; in this process, the sunlight irradiated onto the reflector in the collector is reflected by the reflector and converges to the tube wall of the heat collecting pipe, and heats the heating medium in the heat collecting pipe, so that the temperature of the heating medium in the heat collecting pipe rises; the heating medium with increased temperature generates thermal radiation, and radiates its own heat to the second transmission pipe in the first heat exchanger, heating the heat exchange liquid in the second transmission pipe, so that the temperature of the heat exchange liquid in the second transmission pipe rises.

[0020] Because the first transfer tube portion is located within the first heat exchange chamber and the second transfer tube portion is located within the first heat exchange chamber, the heat generated by the heat exchange fluid in the second transfer tube is radiated to the wall of the first transfer tube portion within the first heat exchange chamber. This heats the rich liquid as it flows through the first transfer tube portion within the first heat exchange chamber, raising its temperature to a target value. The target value is the temperature required for the rich liquid to be separated into carbon dioxide and absorption liquid within the regeneration chamber. After the rich liquid reaches the target temperature and is separated into carbon dioxide and absorption liquid, the separated carbon dioxide leaves the regeneration chamber through the first exhaust port.

[0021] In summary, in the regeneration device of this embodiment, the heat for heating the rich liquid entering the regeneration tower comes from the collector rather than the low-pressure cylinder in the power plant. The separation of carbon dioxide from the rich liquid in the regeneration tower will not affect the normal power generation of the power plant.

[0022] The present application also proposes a flue gas decarbonization system, comprising the regeneration device described in any of the aforementioned items, and an absorption device;

[0023] The regeneration chamber includes a first regeneration chamber and a second regeneration chamber, the first regeneration chamber and the second regeneration chamber are arranged along the gravity direction of the regeneration tower, and the first regeneration chamber is connected to the second regeneration chamber; the first liquid inlet and the first exhaust port are both connected to the first regeneration chamber, and the liquid inlet and the liquid outlet of the first transfer pipe are both connected to the second regeneration chamber;

[0024] The absorption device is arranged opposite to the regeneration device, and the absorption device includes an absorption tower, a liquid inlet pipe and a fourth transmission pipe. The absorption tower includes an absorption chamber, an air inlet and a second air outlet connected to the absorption chamber, the liquid outlet of the liquid inlet pipe is connected to the absorption chamber, the liquid inlet of the fourth transmission pipe is connected to the absorption chamber, and the liquid outlet of the fourth transmission pipe is connected to the first liquid inlet.

[0025] In one embodiment, the absorption chamber includes a first absorption chamber, a second absorption chamber, and a third absorption chamber arranged in sequence along the gravity direction of the absorption tower, the first absorption chamber is connected to the second absorption chamber, and the second absorption chamber is connected to the third absorption chamber;

[0026] The liquid outlet of the liquid inlet pipe and the second exhaust port are both connected to the first absorption chamber, the air inlet is connected to the second absorption chamber, and the liquid inlet of the fourth transmission pipe is connected to the third absorption chamber.

[0027] In one embodiment, the flue gas decarbonization system includes a second heat exchanger;

[0028] The second heat exchanger includes a second heat exchange chamber, a fifth transmission pipe, and a sixth transmission pipe. The fifth transmission pipe is partially located in the second heat exchange chamber, the liquid inlet of the fifth transmission pipe is connected to the liquid outlet of the fourth transmission pipe, and the liquid outlet of the fifth transmission pipe is connected to the first liquid inlet; the sixth transmission pipe is partially located in the second heat exchange chamber, the liquid inlet of the sixth transmission pipe is connected to the second regeneration chamber, and the liquid outlet of the sixth transmission pipe is connected to the first absorption chamber;

[0029] The heat of the liquid in the sixth transmission pipe is greater than the heat of the liquid in the fifth transmission pipe.

[0030] In one embodiment, the flue gas decarbonization system includes a third pump body and a fourth pump body;

[0031] The inlet of the third pump body is connected to the liquid outlet of the fourth transmission pipe, and the outlet of the third pump body is connected to the liquid inlet of the fifth transmission pipe; the inlet of the fourth pump body is connected to the second regeneration chamber, and the outlet of the fourth pump body is connected to the liquid inlet of the sixth transmission pipe.

[0032] In the flue gas decarbonization system of this embodiment, flue gas containing carbon dioxide enters the absorption chamber of the absorption tower through the air inlet. The flue gas entering the absorption chamber undergoes convection with the absorption liquid entering the absorption chamber through the liquid outlet of the liquid inlet pipe. During this convection process, the absorption liquid absorbs carbon dioxide from the flue gas. The flue gas after absorbing carbon dioxide leaves the absorption chamber through the second exhaust port. Simultaneously, after absorbing carbon dioxide from the flue gas, the absorption liquid becomes rich liquid. This rich liquid leaves the absorption chamber through the liquid inlet of the fourth transmission pipe, enters the fourth transmission pipe, and then leaves the fourth transmission pipe through the liquid outlet, enters the first liquid inlet, and then enters the first regeneration chamber through the first liquid inlet. After entering the first regeneration chamber, the rich liquid moves from the first regeneration chamber to the second regeneration chamber under the action of its own gravity.

[0033] The rich liquid entering the second regeneration chamber leaves the second regeneration chamber through the liquid inlet of the first transfer pipe in the first heat exchanger and enters the first transfer pipe; and leaves the first transfer pipe from the liquid outlet and returns to the second regeneration chamber; in this process, the sunlight irradiated onto the reflector in the collector is reflected by the reflector and converged to the tube wall of the heat collecting tube, and heats the heating medium in the heat collecting tube, so that the temperature of the heating medium in the heat collecting tube rises; the heating medium with increased temperature generates thermal radiation, and radiates its own heat to the second transfer pipe in the first heat exchanger, heating the heat exchange liquid in the second transfer pipe, so that the temperature of the heat exchange liquid in the second transfer pipe rises.

[0034] Because the first transfer tube portion is located within the first heat exchange chamber and the second transfer tube portion is located within the first heat exchange chamber, the heat generated by the heat exchange fluid in the second transfer tube is radiated to the wall of the first transfer tube portion within the first heat exchange chamber. This heats the rich liquid as it flows through the first transfer tube portion within the first heat exchange chamber, raising its temperature to a target value. The target value is the temperature required for the rich liquid to be separated into carbon dioxide and absorption liquid within the regeneration chamber. After the rich liquid reaches the target temperature and is separated into carbon dioxide and absorption liquid, the separated carbon dioxide leaves the regeneration chamber through the first exhaust port.

[0035] In summary, in the flue gas decarbonization system of this embodiment, the heat for heating the rich liquid entering the regeneration tower comes from the collector rather than the low-pressure cylinder in the power plant. The separation of carbon dioxide from the rich liquid in the regeneration tower will not affect the normal power generation of the power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 This is a schematic structural diagram of a flue gas decarbonization system in one embodiment of the present application.

[0038] Reference numerals:

[0039] Flue gas decarbonization system 1;

[0040] Regeneration device 100, regeneration tower 110, regeneration chamber 111, first regeneration chamber 111-1, second regeneration chamber 111-2, first exhaust port 112, heating assembly 120, first heat exchanger 121, first heat exchange chamber 121-1, first transmission pipe 121-2, second transmission pipe 121-3, heat collector 122, reflector 122-1, heat collection pipe 122-2, first storage tank 122-3, first pump body 122-4, second storage tank 122-5, second pump body 122-6, heater 123, heating chamber 123-1, third transmission pipe 123-2, heating pipe 123-3;

[0041] Absorption device 200, absorption tower 210, absorption chamber 211, first absorption chamber 211-1, second absorption chamber 211-2, third absorption chamber 211-3, second exhaust port 212, liquid inlet pipe 220, fourth transmission pipe 230;

[0042] A second heat exchanger 300, a second heat exchange chamber 310, a fifth transmission pipe 320, and a sixth transmission pipe 330;

[0043] The third pump body 400;

[0044] Fourth pump body 500. DETAILED DESCRIPTION

[0045] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0047] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0048] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this 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 intermediate medium. Furthermore, when a first feature is described as being "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 described as being "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.

[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0051] See also Figure 1 , Figure 1 The schematic diagram of the structure of the flue gas decarbonization system in one embodiment of the present application is shown. A regeneration device 100 provided in one embodiment of the present application includes: a regeneration tower 110 and a heating assembly 120. The regeneration tower 110 has a regeneration chamber 111, and a first liquid inlet (not shown) and a first exhaust port 112 in communication with the regeneration chamber 111; the heating assembly 120 is in communication with the regeneration chamber 111, and the heating assembly 120 includes a first heat exchanger 121 and a heat collector 122 arranged opposite to each other. The first heat exchanger 121 includes a first heat exchange chamber 121-1, a first transmission pipe 121-2, and a second transmission pipe 121-3. The first transmission pipe 121-2 is partially located in the first heat exchange chamber 121-1. The liquid inlet of the first transmission pipe 121-2 and the first transmission pipe 121-3 are connected to each other. 2 are both connected to the regeneration chamber 111; the second transmission pipe 121-3 contains heat exchange liquid, the second transmission pipe 121-3 is partially located in the first heat exchange chamber 121-1, and the liquid inlet of the second transmission pipe 121-3 is connected to the liquid outlet of the second transmission pipe 121-3; the collector 122 includes at least one reflector 122-1 and a heat collecting pipe 122-2, the reflector 122-1 is configured to reflect sunlight and converge the reflected sunlight to the pipe wall of the heat collecting pipe 122-2 to heat the heating medium in the heat collecting pipe 122-2; the heat of the heating medium is configured to radiate to the second transmission pipe 121-3 to heat the heat exchange liquid in the second transmission pipe 121-3.

[0052] In the regeneration device 100 of this embodiment, after the absorption liquid absorbs the carbon dioxide in the flue gas and becomes rich liquid, it enters the regeneration chamber 111 of the regeneration tower 110 through the first liquid inlet. The rich liquid in the regeneration chamber 111 leaves the regeneration chamber 111 through the liquid inlet of the first transmission pipe 121-2 in the first heat exchanger 121 and enters the first transmission pipe 121-2; and leaves the first transmission pipe 121-2 from the liquid outlet of the first transmission pipe 121-2 and returns to the regeneration chamber 111. In this process, the radiation to the heat collector is The sunlight reflected by the reflector 122-1 in 122 is focused on the wall of the heat collecting pipe 122-2 under the reflection of the reflector 122-1, and heats the heating medium in the heat collecting pipe 122-2, so that the temperature of the heating medium in the heat collecting pipe 122-2 rises; the heating medium with increased temperature generates thermal radiation, and radiates its own heat to the second transmission pipe 121-3 in the first heat exchanger 121, heating the heat exchange fluid in the second transmission pipe 121-3, so that the temperature of the heat exchange fluid in the second transmission pipe 121-3 rises.

[0053] Because the first transfer tube 121-2 is partially located within the first heat exchange chamber 121-1 and the second transfer tube 121-3 is partially located within the first heat exchange chamber 121-1, the heat generated by the heat exchange fluid in the second transfer tube 121-3 is radiated to the tube wall of the portion of the first transfer tube 121-2 within the first heat exchange chamber 121-1. This heats the rich liquid as it flows through the portion of the first transfer tube 121-2 within the first heat exchange chamber 121-1, causing the temperature of the rich liquid to rise to a target value. The target value refers to the temperature required for the rich liquid to be separated into carbon dioxide and absorption liquid within the regeneration chamber 111. After the rich liquid reaches the target temperature and is separated into carbon dioxide and absorption liquid, the separated carbon dioxide leaves the regeneration chamber 111 through the first exhaust port 112.

[0054] In summary, in the regeneration device 100 of this embodiment, the heat for heating the rich liquid entering the regeneration tower 110 comes from the collector 122 rather than the low-pressure cylinder (not shown) in the power plant. The separation of carbon dioxide from the rich liquid in the regeneration tower will not affect the normal power generation of the power plant.

[0055] See also Figure 1 In some embodiments, the heating assembly 120 includes a heater 123, which is located between the first heat exchanger 121 and the heat collector 122; the heater 123 includes a heating chamber 123-1, a third transmission tube 123-2 and a heating tube 123-3 located in the heating chamber 123-1, the liquid inlet of the third transmission tube 123-2 is connected to the liquid outlet of the second transmission tube 121-3, and the liquid outlet of the third transmission tube 123-2 is connected to the liquid inlet of the second transmission tube 121-3; the inlet of the heating tube 123-3 is connected to the outlet of the heat collecting tube 122-2, and the outlet of the heating tube 123-3 is connected to the inlet of the heat collecting tube 122-2.

[0056] In this embodiment, sunlight directed toward reflector 122-1 in heat collector 122 is reflected by reflector 122-1 and converges onto the wall of heat collecting tube 122-2, heating the heating medium within heat collecting tube 122-2. This heat-increasing heating medium then leaves heat collecting tube 122-2 through its outlet and enters heating tube 123-3 through its inlet. During this process, the heat exchange fluid within second transfer tube 121-3 leaves second transfer tube 121-3 through its outlet, enters third transfer tube 123-2 through its inlet, and enters the heat exchange fluid within third transfer tube 123-2.

[0057] Since the third transmission tube 123-2 and the heating tube 123-3 are located in the heating chamber 123-1, the heating medium in the heating tube 123-3 can radiate its own heat to the third transmission tube 123-2, heating the heat exchange liquid in the third transmission tube 123-2, thereby facilitating the heated heat exchange liquid in the third transmission tube 123-2 to leave the third transmission tube 123-2 from the liquid outlet of the third transmission tube 123-2, return to the second transmission tube 121-3 through the liquid inlet of the second transmission tube 121-3, and heat the rich liquid in the first transmission tube 121-2 by radiating heat to the tube wall of the first transmission tube 121-2 in the first heat exchange chamber 121-1.

[0058] It should be noted that after the heating medium in the heating tube 123-3 radiates its own heat to the third transmission tube 123-2, it will leave the heating tube 123-3 through the outlet of the heating tube 123-3 and then return to the heat collecting tube 122-2 through the inlet of the heat collecting tube 122-2.

[0059] See also Figure 1 In some embodiments, the heat collector 122 includes a plurality of reflectors 122-1 and a plurality of heat collecting tubes 122-2; the plurality of heat collecting tubes 122-2 and the plurality of reflectors 122-1 are arranged correspondingly, and at least one reflector 122-1 is provided on the periphery of each heat collecting tube 122-2.

[0060] In this embodiment, by setting the collector 122 to include multiple heat collecting tubes 122-2, and at least one reflector 122-1 is provided on the outer periphery of each heat collecting tube 122-2, the heating medium in the collector 122 can be increased, so that more heating medium in the collector 122 enters the heating tube 123-3, thereby increasing the heat radiated by the heating medium in the heating tube 123-3 to the third transmission tube 123-2, ensuring that the heat exchange fluid in the third transmission tube 123-2 can be heated to a higher temperature.

[0061] See also Figure 1 In some embodiments, a plurality of reflectors 122-1 are provided on the periphery of each heat collecting tube 122-2, and the plurality of reflectors 122-1 corresponding to each heat collecting tube 122-2 are configured to be arranged at intervals along the extension direction of the heat collecting tube 122-2.

[0062] In this embodiment, by providing multiple reflectors 122-1 on the outer periphery of each heat collecting tube 122-2, the heating medium in each heat collecting tube 122-2 can be heated to a higher temperature, thereby facilitating the heating medium to radiate more heat after entering the heating tube 123-3.

[0063] In some embodiments, the reflector 122-1 is a parabolic trough reflector, and the heat collecting tube 122-2 is located at the focal line of the parabolic trough reflector to ensure that after the sunlight is focused by the parabolic trough reflector, the focused light spot is accurately on the outer wall of the heat collecting tube 122-2.

[0064] In some embodiments, the collector 122 includes a driving assembly (not shown), and the heat collecting tube 122-2 and the reflector 122-1 are both connected to the output end of the driving assembly. The driving assembly is configured to adjust the inclination and azimuth of the reflector 122-1 to achieve two-dimensional tracking of sunlight.

[0065] In some embodiments, the regeneration device 100 includes a detection component (not shown in the figure), which includes a first temperature sensor (not shown in the figure) and a second temperature sensor (not shown in the figure). The first temperature sensor is arranged at the inlet of the heat collecting pipe 122-2, and the second temperature sensor is arranged at the outlet of the heat collecting pipe 122-2.

[0066] See also Figure 1 In some embodiments, the collector 122 includes a first storage tank 122-3 and a first pump body 122-4; the first storage tank 122-3 contains a heating medium, the inlet of the first storage tank 122-3 is connected to the outlet of the heating pipe 123-3, the outlet of the first storage tank 122-3 is connected to the inlet of the first pump body 122-4, and the outlet of the first pump body 122-4 is connected to the inlet of the heat collecting pipe 122-2.

[0067] In this embodiment, the heating medium contained in the first storage tank 122-3 leaves the first storage tank 122-3 from the outlet of the first storage tank 122-3, enters the first pump body 122-4 through the inlet of the first pump body 122-4, and then leaves the first pump body 122-4 from the outlet of the first pump body 122-4, and enters the heat collecting pipe 122-2 through the inlet of the heat collecting pipe 122-2; the heating medium entering the heat collecting pipe 122-2 is heated by the heat generated by the sunlight reflected by the reflector 122-1 and converged to the pipe wall of the heat collecting pipe 122-2.

[0068] After the temperature rises, the heating medium leaves the heat collecting pipe 122-2 from the outlet of the heat collecting pipe 122-2. After leaving the heat collecting pipe 122-2, the heating medium enters the heating pipe 123-3 through the inlet of the heating pipe 123-3 and radiates its own heat to the third transmission pipe 123-2, heating the heat exchange liquid in the third transmission pipe 123-2. During this process, the heat contained in the heating medium in the heating pipe 123-3 gradually decreases, and the heating medium with reduced heat will leave the heating pipe 123-3 through the outlet of the heating pipe 123-3, and then return to the first storage tank 122-3 through the inlet of the first storage tank 122-3.

[0069] During the entire process described above, the power of the first pump body 122-4 can be adjusted to change the movement rate of the heating medium entering the heat collecting pipe 122-2 from the inlet of the heat collecting pipe 122-2 through the outlet of the first pump body 122-4, thereby ensuring that at any time, the unit volume of heating medium entering the heat collecting pipe 122-2 is heated to the same temperature.

[0070] In some embodiments, the heat exchange fluid includes water.

[0071] See also Figure 1 In some embodiments, the collector 122 includes a second storage tank 122-5 and a second pump body 122-6; the inlet of the second storage tank 122-5 is connected to the outlet of the heat collecting pipe 122-2, the outlet of the second storage tank 122-5 is connected to the inlet of the second pump body 122-6, and the outlet of the second pump body 122-6 is connected to the inlet of the heating pipe 123-3.

[0072] In this embodiment, the heating medium entering the heat collecting pipe 122-2 from the inlet of the heat collecting pipe 122-2 is heated by the heat generated by the sunlight reflected by the reflector 122-1 and converged to the pipe wall of the heat collecting pipe 122-2, and then leaves the heat collecting pipe 122-2 through the outlet of the heat collecting pipe 122-2. The heating medium leaving the heat collecting pipe 122-2 enters the second storage tank 122-5 from the inlet of the second storage tank 122-5 and is stored in the second storage tank 122-5; in this process, the heating medium in the second storage tank 122-5 will leave the second storage tank 122-5 from the outlet of the second storage tank 122-5 under the action of the second pump body 122-6, enter the second pump body 122-6 through the inlet of the second pump body 122-6, and then leave the second pump body 122-6 from the outlet of the second pump body 122-6 and enter the heating pipe 123-3 through the inlet of the heating pipe 123-3.

[0073] In the above process, by storing the heated heating medium in the heat collecting tube 122-2 into the second storage tank 122-5, the fluctuating and unstable solar energy can be converted into thermal energy for storage; by adjusting the working power of the second pump body 122-6, the movement rate of the heating medium entering the heating tube 123-3 from the outlet of the second pump body 122-6 and the inlet of the heating tube 123-3 can be changed, so that the heating medium stored in the second storage tank 122-5 enters the heating tube 123-3 evenly and stably, and then stably heats the heat exchange liquid in the third transmission tube 123-2.

[0074] See also Figure 1 , Figure 1 A schematic structural diagram of a flue gas decarbonization system in one embodiment of the present application is shown. An embodiment of the present application provides a flue gas decarbonization system 1, comprising the aforementioned regeneration device 100 and an absorption device 200. The regeneration chamber 111 comprises a first regeneration chamber 111-1 and a second regeneration chamber 111-2, the first regeneration chamber 111-1 and the second regeneration chamber 111-2 being arranged along the gravity direction of the regeneration tower 110, and the first regeneration chamber 111-1 being in communication with the second regeneration chamber 111-2; the first liquid inlet and the first exhaust port 112 are both in communication with the first regeneration chamber 111-1, and the liquid inlet of the first transmission pipe 121-2 and the liquid outlet of the first transmission pipe 121-2 are both in communication with the second regeneration chamber 111-2. The absorption device 200 is arranged opposite to the regeneration device 100. The absorption device 200 includes an absorption tower 210, a liquid inlet pipe 220 and a fourth transmission pipe 230. The absorption tower 210 includes an absorption chamber 211, an air inlet (not marked in the figure) and a second air outlet 212 connected to the absorption chamber 211. The liquid outlet of the liquid inlet pipe 220 is connected to the absorption chamber 211, the liquid inlet of the fourth transmission pipe 230 is connected to the absorption chamber 211, and the liquid outlet of the fourth transmission pipe 230 is connected to the first liquid inlet.

[0075] In the flue gas decarbonization system 1 of this embodiment, flue gas containing carbon dioxide enters the absorption chamber 211 of the absorption tower 210 through the air inlet. The flue gas entering the absorption chamber 211 undergoes convection with the absorption liquid entering the absorption chamber 211 through the liquid outlet of the liquid inlet pipe 220. During this convection process, the absorption liquid absorbs carbon dioxide from the flue gas. The flue gas after absorbing the carbon dioxide leaves the absorption chamber 211 through the second exhaust port 212. Simultaneously, after absorbing the carbon dioxide from the flue gas, the absorption liquid becomes rich liquid. This rich liquid leaves the absorption chamber 211 through the liquid inlet of the fourth transmission pipe 230, enters the fourth transmission pipe 230, and then leaves the fourth transmission pipe 230 through the liquid outlet, enters the first liquid inlet, and then enters the first regeneration chamber 111-1 through the first liquid inlet. After entering the first regeneration chamber 111-1, the rich liquid moves from the first regeneration chamber 111-1 to the second regeneration chamber 111-2 under the action of its own gravity.

[0076] The rich liquid entering the second regeneration chamber 111-2 leaves the second regeneration chamber 111-2 through the liquid inlet of the first transfer pipe 121-2 in the first heat exchanger 121 and enters the first transfer pipe 121-2; and leaves the first transfer pipe 121-2 from the liquid outlet of the first transfer pipe 121-2 and returns to the second regeneration chamber 111-2; during this process, the sunlight irradiated onto the reflector 122-1 in the collector 122 is reflected by the reflector 122-1 and converged to the pipe wall of the heat collecting pipe 122-2, and heats the heating medium in the heat collecting pipe 122-2, so that the temperature of the heating medium in the heat collecting pipe 122-2 increases; the heating medium with increased temperature generates thermal radiation and radiates its own heat to the second transfer pipe 121-3 in the first heat exchanger 121, heating the heat exchange liquid in the second transfer pipe 121-3, so that the temperature of the heat exchange liquid in the second transfer pipe 121-3 increases.

[0077] Because the first transfer tube 121-2 is partially located within the first heat exchange chamber 121-1 and the second transfer tube 121-3 is partially located within the first heat exchange chamber 121-1, the heat generated by the heat exchange fluid in the second transfer tube 121-3 is radiated to the tube wall of the portion of the first transfer tube 121-2 within the first heat exchange chamber 121-1. This heats the rich liquid as it flows through the portion of the first transfer tube 121-2 within the first heat exchange chamber 121-1, causing the temperature of the rich liquid to rise to a target value. The target value refers to the temperature required for the rich liquid to be separated into carbon dioxide and absorption liquid within the regeneration chamber 111. After the rich liquid reaches the target temperature and is separated into carbon dioxide and absorption liquid, the separated carbon dioxide leaves the regeneration chamber 111 through the first exhaust port 112.

[0078] In summary, in the flue gas decarbonization system 1 of this embodiment, the heat for heating the rich liquid entering the regeneration tower 110 comes from the collector 122 rather than the low-pressure cylinder in the power plant. The separation of carbon dioxide from the rich liquid in the regeneration tower will not affect the normal power generation of the power plant.

[0079] In some embodiments, the heating medium comprises molten salt.

[0080] See also Figure 1 In some embodiments, the absorption chamber 211 includes a first absorption chamber 211-1, a second absorption chamber 211-2, and a third absorption chamber 211-3 arranged in sequence along the gravity direction of the absorption tower 210, the first absorption chamber 211-1 is connected to the second absorption chamber 211-2, and the second absorption chamber 211-2 is connected to the third absorption chamber 211-3; the liquid outlet and the second exhaust port 212 of the liquid inlet pipe 220 are both connected to the first absorption chamber 211-1, the air inlet is connected to the second absorption chamber 211-2, and the liquid inlet of the fourth transmission pipe 230 is connected to the third absorption chamber 211-3.

[0081] In this embodiment, flue gas containing carbon dioxide enters the second absorption chamber 211-2 through the air inlet. Once inside, the flue gas containing carbon dioxide moves from the second absorption chamber 211-2 to the first absorption chamber 211-1. Simultaneously, the absorption liquid enters the first absorption chamber 211-1 through the liquid outlet of the liquid inlet pipe 220 and, under the action of its own gravity, moves from the first absorption chamber 211-1 to the second absorption chamber 211-2, generating convection with the flue gas containing carbon dioxide. During this convection process, the absorption liquid absorbs the carbon dioxide from the flue gas, and the flue gas containing the carbon dioxide leaves the absorption chamber 211 through the second exhaust port 212.

[0082] After absorbing the carbon dioxide in the flue gas, the absorption liquid becomes rich liquid. Under the action of its own gravity, the rich liquid will move from the second absorption chamber 211-2 to the third absorption chamber 211-3. The rich liquid entering the third absorption chamber 211-3 will leave the third absorption chamber 211-3 through the liquid inlet of the fourth transmission pipe 230, enter the fourth transmission pipe 230, and leave the fourth transmission pipe 230 from the liquid outlet of the fourth transmission pipe 230, enter the first liquid inlet, and enter the first regeneration chamber 111-1 through the first liquid inlet.

[0083] See also Figure 1 In some embodiments, the flue gas decarbonization system 1 includes a second heat exchanger 300; the second heat exchanger 300 includes a second heat exchange chamber 310, a fifth transmission pipe 320 and a sixth transmission pipe 330, the fifth transmission pipe 320 is partially located in the second heat exchange chamber 310, the liquid inlet of the fifth transmission pipe 320 is connected to the liquid outlet of the fourth transmission pipe 230, and the liquid outlet of the fifth transmission pipe 320 is connected to the first liquid inlet; the sixth transmission pipe 330 is partially located in the second heat exchange chamber 310, the liquid inlet of the sixth transmission pipe 330 is connected to the second regeneration chamber 111-2, and the liquid outlet of the sixth transmission pipe 330 is connected to the first absorption chamber 211-1; wherein, the heat of the liquid in the sixth transmission pipe 330 is greater than the heat of the liquid in the fifth transmission pipe 320.

[0084] In this embodiment, the rich liquid entering the third absorption chamber 211-3 exits the third absorption chamber 211-3 through the liquid inlet of the fourth transfer pipe 230, enters the fourth transfer pipe 230, and then exits the fourth transfer pipe 230 through the liquid outlet of the fourth transfer pipe 230. It enters the fifth transfer pipe 320 through the liquid inlet of the fifth transfer pipe 320, then exits the fifth transfer pipe 320 through the liquid outlet of the fifth transfer pipe 320, enters the first liquid inlet, and then enters the first regeneration chamber 111-1 through the first liquid inlet. During this process, the rich liquid in the second regeneration chamber 111-2 is separated into carbon dioxide and absorption liquid. The separated absorption liquid then exits the second regeneration chamber 111-2 through the liquid inlet of the sixth transfer pipe 330 and enters the sixth transfer pipe 330. It then returns to the first absorption chamber 211-1 through the liquid outlet of the sixth transfer pipe 330.

[0085] Since part of the fifth transmission tube 320 is located in the second heat exchange chamber 310 and part of the sixth transmission tube 330 is located in the second heat exchange chamber 310, the heat of the liquid in the sixth transmission tube 330 is greater than the heat of the liquid in the fifth transmission tube 320; therefore, when the absorption liquid in the sixth transmission tube 330 flows through the part of the sixth transmission tube 330 located in the second heat exchange chamber 310, it will radiate heat to the fifth transmission tube 320 located in the second heat exchange chamber 310, so as to heat the absorption liquid flowing through the fifth transmission tube 320.

[0086] See also Figure 1 In some embodiments, the flue gas decarbonization system 1 includes a third pump body 400 and a fourth pump body 500; the inlet of the third pump body 400 is connected to the liquid outlet of the fourth transmission pipe 230, and the outlet of the third pump body 400 is connected to the liquid inlet of the fifth transmission pipe 320; the inlet of the fourth pump body 500 is connected to the second regeneration chamber 111-2, and the outlet of the fourth pump body 500 is connected to the liquid inlet of the sixth transmission pipe 330.

[0087] In this embodiment, the rich liquid entering the third absorption chamber 211-3 will leave the third absorption chamber 211-3 through the liquid inlet of the fourth transmission pipe 230, enter the fourth transmission pipe 230, and leave the fourth transmission pipe 230 from the liquid outlet of the fourth transmission pipe 230, enter the third pump body 400 from the inlet of the third pump body 400, and then leave the third pump body 400 from the outlet of the third pump body 400, and enter the fifth transmission pipe 320 from the liquid inlet of the fifth transmission pipe 320.

[0088] After the rich liquid in the second regeneration chamber 111-2 is converted into carbon dioxide and absorption liquid, the separated absorption liquid leaves the second regeneration chamber 111-2 through the inlet of the fourth pump body 500 and enters the fourth pump body 500; then, it leaves the fourth pump body 500 through the outlet of the fourth pump body 500 and enters the sixth transmission pipe 330 through the liquid inlet of the sixth transmission pipe 330.

[0089] In some embodiments, the flue gas decarbonization system 1 includes a control hub (not shown), and the first pump body 122 - 4 and the second pump body 122 - 6 are both communicatively connected to the control hub.

[0090] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A regeneration device, characterized in that: The regeneration device comprises: A regeneration tower having a regeneration chamber, and a first liquid inlet and a first exhaust port communicated with the regeneration chamber; a heating assembly, connected to the regeneration chamber, comprising a first heat exchanger and a heat collector arranged opposite to each other, the first heat exchanger comprising a first heat exchange chamber, a first transmission pipe, and a second transmission pipe, the first transmission pipe being partially located within the first heat exchange chamber, the liquid inlet of the first transmission pipe and the liquid outlet of the first transmission pipe both being connected to the regeneration chamber; the second transmission pipe containing heat exchange fluid, the second transmission pipe being partially located within the first heat exchange chamber, the liquid inlet of the second transmission pipe being connected to the liquid outlet of the second transmission pipe; The collector includes at least one reflector and a heat collecting tube. The reflector is configured to reflect sunlight and converge the reflected sunlight to the tube wall of the heat collecting tube to heat the heating medium in the heat collecting tube; the heat of the heating medium is configured to radiate to the second transmission tube to heat the heat exchange fluid in the second transmission tube.

2. The regeneration device according to claim 1, wherein The heating assembly includes a heater, and the heater is located between the first heat exchanger and the heat collector; The heater includes a heating chamber, a third transmission tube and a heating tube located in the heating chamber, the liquid inlet of the third transmission tube is connected to the liquid outlet of the second transmission tube, and the liquid outlet of the third transmission tube is connected to the liquid inlet of the second transmission tube; the inlet of the heating tube is connected to the outlet of the heat collecting tube, and the outlet of the heating tube is connected to the inlet of the heat collecting tube.

3. The regeneration device according to claim 2, characterized in that The heat collector includes a plurality of the reflectors and a plurality of the heat collecting tubes; The plurality of heat collecting tubes are arranged corresponding to the plurality of reflectors, and at least one reflector is provided on the outer periphery of each heat collecting tube.

4. The regeneration device according to claim 3, characterized in that A plurality of reflectors are provided on the outer periphery of each heat collecting tube, and the plurality of reflectors corresponding to each heat collecting tube are configured to be arranged at intervals along the extension direction of the heat collecting tube.

5. The regeneration device according to claim 2, characterized in that The heat collector includes a first storage tank and a first pump body; The first storage tank contains the heating medium, the inlet of the first storage tank is connected to the outlet of the heating pipe, the outlet of the first storage tank is connected to the inlet of the first pump body, and the outlet of the first pump body is connected to the inlet of the heat collecting pipe.

6. The regeneration device according to claim 5, characterized in that The heat collector includes a second storage tank and a second pump body; The inlet of the second storage tank is communicated with the outlet of the heat collecting pipe, the outlet of the second storage tank is communicated with the inlet of the second pump body, and the outlet of the second pump body is communicated with the inlet of the heating pipe.

7. A flue gas decarbonization system, characterized in that: comprising a regeneration device as described in any one of claims 1 to 6, and an absorption device; The regeneration chamber includes a first regeneration chamber and a second regeneration chamber, the first regeneration chamber and the second regeneration chamber are arranged along the gravity direction of the regeneration tower, and the first regeneration chamber is connected to the second regeneration chamber; the first liquid inlet and the first exhaust port are both connected to the first regeneration chamber, and the liquid inlet and the liquid outlet of the first transfer pipe are both connected to the second regeneration chamber; The absorption device is arranged opposite to the regeneration device, and the absorption device includes an absorption tower, a liquid inlet pipe and a fourth transmission pipe. The absorption tower includes an absorption chamber, an air inlet and a second air outlet connected to the absorption chamber, the liquid outlet of the liquid inlet pipe is connected to the absorption chamber, the liquid inlet of the fourth transmission pipe is connected to the absorption chamber, and the liquid outlet of the fourth transmission pipe is connected to the first liquid inlet.

8. The flue gas decarbonization system according to claim 7, characterized in that: The absorption chamber includes a first absorption chamber, a second absorption chamber, and a third absorption chamber arranged in sequence along the gravity direction of the absorption tower, the first absorption chamber is connected to the second absorption chamber, and the second absorption chamber is connected to the third absorption chamber; The liquid outlet of the liquid inlet pipe and the second exhaust port are both connected to the first absorption chamber, the air inlet is connected to the second absorption chamber, and the liquid inlet of the fourth transmission pipe is connected to the third absorption chamber.

9. The flue gas decarbonization system according to claim 8, characterized in that: The flue gas decarbonization system includes a second heat exchanger; The second heat exchanger includes a second heat exchange chamber, a fifth transmission pipe, and a sixth transmission pipe. The fifth transmission pipe is partially located in the second heat exchange chamber, the liquid inlet of the fifth transmission pipe is connected to the liquid outlet of the fourth transmission pipe, and the liquid outlet of the fifth transmission pipe is connected to the first liquid inlet; the sixth transmission pipe is partially located in the second heat exchange chamber, the liquid inlet of the sixth transmission pipe is connected to the second regeneration chamber, and the liquid outlet of the sixth transmission pipe is connected to the first absorption chamber; The heat of the liquid in the sixth transmission pipe is greater than the heat of the liquid in the fifth transmission pipe.

10. The flue gas decarbonization system according to claim 9, characterized in that: The flue gas decarbonization system includes a third pump body and a fourth pump body; The inlet of the third pump body is connected to the liquid outlet of the fourth transmission pipe, and the outlet of the third pump body is connected to the liquid inlet of the fifth transmission pipe; the inlet of the fourth pump body is connected to the second regeneration chamber, and the outlet of the fourth pump body is connected to the liquid inlet of the sixth transmission pipe.

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