Photo-assisted absorbent regeneration device and carbon dioxide capture system

Abstract

The invention belongs to the technical field of carbon capture, and particularly relates to a photo-assisted absorbent regeneration device and a carbon dioxide capture system.The photo-assisted absorbent regeneration device comprises a photoreaction device cylinder; the photo-thermal collection device is arranged above the photoreaction device cylinder; the photocatalytic response agent is arranged in the middle of the photoreaction device barrel; and the heat storage circulating device is arranged in the photoreaction device barrel and used for moving the heat absorbed by the photothermal collection device into the photoreaction device barrel. The invention also discloses a carbon dioxide capture system using the photo-assisted absorbent regeneration device. According to the present invention, the light response ability of the alcohol amine absorbent and the light response agent is utilized, such that the proton transfer during the amine liquid regeneration process is significantly enhanced, the absorbent regeneration efficiency is enhanced, and the energy saving and consumption reducing effects are achieved by efficiently collecting the light energy, reasonably designing the photo-thermal conversion and effectively distributing the high-quality heat source.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon capture, and in particular relates to a light-assisted absorbent regeneration device and a carbon dioxide capture system. Background Art

[0002] Chemical absorption using alcohol amines as absorbents is an effective carbon dioxide capture technology with high carbon dioxide capture efficiency and adaptability. It does not require large-scale transformation of existing carbon dioxide emission industries (electricity, steel, cement, etc.) and is one of the most mature carbon capture technologies currently. However, in actual applications, due to the poor proton transfer capacity in alkaline solvents and the strong binding force of amine solvents with carbon dioxide, it faces the problems of large steam consumption and high energy consumption during the regeneration process.

[0003] In the existing technology, proton transfer acceleration is an effective way to enhance absorbent regeneration. Developing efficient proton transfer enhancement strategies to reduce the high regeneration energy consumption of the traditional amine method has become an urgent problem to be solved in the current carbon capture technology. Using external field energy to enhance absorbent regeneration is an effective way to reduce the energy consumption of carbon capture. Therefore, we propose a light-assisted absorbent regeneration device and a carbon dioxide capture system to solve the problem of high regeneration energy consumption of the traditional amine method. Summary of the invention

[0004] The object of the present invention is to provide a light-assisted absorber regeneration device and a carbon dioxide capture system to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A light-assisted absorber regeneration device, comprising:

[0007] A photoreaction device cylinder, wherein one side of the top of the photoreaction device cylinder is connected to a light regeneration device rich liquid inlet, the other side of the top of the photoreaction device cylinder is connected to a light regeneration device carbon dioxide outlet, and the bottom of the photoreaction device cylinder is connected to a light regeneration device amine liquid outlet;

[0008] A photothermal collection device is arranged above the photoreaction device cylinder, and the bottom of the photothermal collection device is in optical communication with the photoreaction device cylinder;

[0009] A photocatalytic responder is arranged in the middle of the barrel of the photoreaction device;

[0010] The heat storage circulation device is arranged in the photoreaction device cylinder, and the heat storage circulation device is arranged for heat exchange with the photoreaction device cylinder and the photothermal collection device. The heat storage circulation device is used to move the heat absorbed by the photothermal collection device into the photoreaction device cylinder.

[0011] According to the above-mentioned light-assisted absorber regeneration device, the photoresponse agent adopts the method of loading the shaped catalyst into a non-woven fabric permeable bag and arranged in the barrel of the photoreaction device. Since the pores on the non-woven fabric permeable bag are small, the shaped photocatalyst will not flow out of the pores, ensuring that the amine liquid can be immersed in the bag, and the agitator can drive the amine liquid and the shaped photoresponse agent to fully contact and regenerate, while effectively reducing the risk of solid sedimentation and pipeline blockage, and extending the operating life of the system.

[0012] According to the above-mentioned light-assisted absorber regeneration device, the photoresponsive agent may be TiO2.

[0013] According to the above-mentioned light-assisted absorber regeneration device, the photothermal collection device includes:

[0014] A light collection container, wherein a cavity is provided inside the light collection container, a first light transmission device is fixedly connected to the top of the light collection container, a second light transmission device is fixedly connected to the bottom of the light collection container, and the light collection container is connected to the barrel of the light reaction device through the optical path of the second light transmission device;

[0015] A light inlet channel is arranged on the top of the first light transmitting device, and the bottom of the light inlet channel is connected to the optical path of the top of the first light transmitting device;

[0016] A sunlight receiving device is arranged at the top of the light inlet channel, and the bottom of the sunlight receiving device is in optical communication with the top of the light inlet channel;

[0017] The light directional reflection and absorption device is arranged in the cavity, and is used for reflecting the light entering the cavity for multiple times and absorbing heat energy.

[0018] According to the above-mentioned light-assisted absorber regeneration device, the sunlight receiving device is in the shape of a downwardly concave bowl, and is used to sense and receive sunlight in the environment.

[0019] According to the above-mentioned light-assisted absorber regeneration device, the first light-transmitting device and the second light-transmitting device are made of high borosilicate glass, and the plate surfaces of the first light-transmitting device and the second light-transmitting device are located in the horizontal direction.

[0020] According to the above-mentioned light-assisted absorber regeneration device, it also includes: the light directional reflection and absorption device includes a plurality of corrugated plates arranged in parallel, the corrugated plates are made of mirror stainless steel, the plate surface of the corrugated plates is located in the vertical direction, the plurality of corrugated plates are fixed in the cavity, and the plurality of corrugated plates reflect the light entering the cavity multiple times and absorb heat energy.

[0021] According to the above-mentioned light-assisted absorber regeneration device, the heat storage cycle device includes:

[0022] A heat exchange pipeline is arranged in the cylinder of the photoreaction device and exchanges heat with the liquid in the cylinder of the photoreaction device. The inlet of the heat exchange pipeline is connected to the bottom side of the cavity through the outlet of the fluid circulation pipe. The outlet of the heat exchange pipeline is connected to the inlet of the fan. The outlet of the fan is connected to the other side of the bottom of the cavity through the inlet of the fluid circulation pipe.

[0023] According to the above-mentioned light-assisted absorber regeneration device, the heat exchange pipeline is arranged in a horizontally placed coil shape, the material of the heat exchange pipeline is stainless steel, which has good corrosion resistance and high temperature resistance, and the heat exchange pipeline is filled with heat storage material. The heat storage material in the heat exchange pipeline can store the heat energy converted from light energy in the light collection container to provide heat for the light regeneration reaction, and the fluid after heat exchange returns to the light collection container cavity to be heated again.

[0024] According to the above-mentioned light-assisted absorber regeneration device, the heat storage material may be molten salt or water.

[0025] According to the above-mentioned light-assisted absorber regeneration device, the power device capable of driving the fluid flow may be a fan.

[0026] According to the above-mentioned light-assisted absorber regeneration device, the heat-conducting fluid flowing through the fluid circulation channel, the fluid circulation pipe outlet and the fluid circulation pipe inlet can be helium or air.

[0027] According to the above-mentioned light-assisted absorber regeneration device, a heat-insulating layer is provided on the outer wall of the light-collecting container and the barrel of the light-reaction device.

[0028] The solar energy collection and storage device of the present invention can convert light energy into heat energy more efficiently and avoid the loss of light energy and heat energy. It can also heat the heat storage medium to a temperature of about 150° C., thereby obtaining high-quality heat energy.

[0029] According to the above-mentioned light-assisted absorber regeneration device, it also includes:

[0030] The stirrer is rotatably arranged at the bottom of the barrel of the photoreaction device.

[0031] A carbon dioxide capture system comprises a carbon dioxide absorption device, a heat exchange device and a carbon dioxide regeneration device which are connected to each other, and is also connected to the above-mentioned light-assisted absorbent regeneration device.

[0032] According to the above-mentioned carbon dioxide capture system, the carbon dioxide absorption device comprises:

[0033] An absorption tower, wherein flue gas enters from a flue gas inlet at one side of the bottom of the absorption tower, and an absorption liquid moves from the absorption tower from top to bottom to absorb carbon dioxide in the flue gas and convert it into decarbonized flue gas, and the decarbonized flue gas is discharged from a flue gas outlet at the top of the absorption tower, and the absorption liquid is discharged from a rich liquid outlet of the absorption tower connected to the bottom of the absorption tower;

[0034] a first liquid pump, wherein the inlet of the first liquid pump is connected to the rich liquid outlet pipeline of the absorption tower, the outlet pipeline of the first liquid pump is connected to the rich liquid pipeline inlet of the heat exchange device, and the rich liquid pipeline outlet of the heat exchange device is connected to the rich liquid inlet of the carbon dioxide regeneration device and the rich liquid inlet of the light regeneration device;

[0035] A third liquid pump, wherein the inlet of the third liquid pump is connected to the outlet of the lean liquid pipeline of the heat exchange device, the inlet of the lean liquid pipeline of the heat exchange device is connected to the lean liquid outlet of the carbon dioxide regeneration device, the outlet of the third liquid pump is connected to the lean liquid inlet of the absorption tower, and the lean liquid inlet of the absorption tower is connected and arranged on the top side of the absorption tower.

[0036] According to the above-mentioned carbon dioxide capture system, the heat exchange device includes a heat exchanger, a reboiler and a condenser;

[0037] The rich liquid pipeline inlet of the heat exchanger is connected to the outlet of the first liquid pump;

[0038] The rich liquid pipeline outlet of the heat exchanger is connected to the rich liquid inlet of the light regeneration device and the rich liquid inlet of the carbon dioxide regeneration device;

[0039] The lean liquid pipeline inlet of the heat exchanger is connected to the lean liquid outlet of the carbon dioxide regeneration device;

[0040] The lean liquid pipeline outlet of the heat exchanger is connected to the inlet of the third liquid pump;

[0041] The reboiler is connected to the lean liquid outlet side of the carbon dioxide regeneration device, and is used to provide heat for the reaction in the carbon dioxide regeneration device;

[0042] The inlet of the condenser is connected to the carbon dioxide outlet of the light regeneration device and the carbon dioxide outlet of the carbon dioxide regeneration device. The condenser is used to condense water vapor and absorption liquid in the humid carbon dioxide gas. The condensed carbon dioxide gas is transported to the carbon dioxide storage tank through a pipeline, and the condensed liquid is transported to the inlet of the fourth liquid pump through a pipeline. The outlet of the fourth liquid pump is connected to the lean liquid inlet of the absorption tower through a pipeline.

[0043] According to the above-mentioned carbon dioxide capture system, the carbon dioxide regeneration device comprises:

[0044] A thermal regeneration tower, wherein the thermal regeneration tower is connected to the amine liquid outlet of the optical regeneration device and the rich liquid pipeline outlet of the heat exchanger through a rich liquid inlet of the thermal regeneration tower; the amine liquid outlet of the optical regeneration device is connected to a second liquid pump inlet, and the second liquid pump outlet is connected to the rich liquid inlet of the thermal regeneration tower;

[0045] The top of the thermal regeneration tower is connected to the condenser inlet through the thermal regeneration tower carbon dioxide outlet, and the bottom of the thermal regeneration tower is connected to the lean liquid pipeline inlet of the heat exchanger through the thermal regeneration tower rich liquid outlet;

[0046] The reboiler heat exchanger is arranged at the bottom of the thermal regeneration tower;

[0047] The outlet of the fourth liquid pump is communicated with the thermal regeneration tower, so as to allow the condensate to flow back into the thermal regeneration tower to participate in thermal regeneration.

[0048] Compared with the prior art, the present invention has the following advantages and technical effects:

[0049] When in use, light is collected by the photothermal collection device and transmitted to the cylinder of the photoreaction device to provide excitation light energy for the photocatalytic responder. At the same time, the heat energy generated by the light is absorbed and transferred to the cylinder of the photoreaction device through the heat storage circulation device. The rich liquid enters the cylinder of the photoreaction device through the rich liquid inlet of the photoregeneration device. Under the combined action of light and heat energy, the amine solvent is regenerated, and the carbon dioxide released by the regeneration reaction is discharged from the carbon dioxide outlet of the photoregeneration device, and the lean liquid is discharged from the amine liquid outlet of the photoregeneration device.

[0050] In summary, the present invention has the following advantages:

[0051] (1) The light-assisted absorber regeneration and desorption device of the present invention guides light to the barrel of the photoreaction device through a light-heat collection device, and utilizes the response ability of the alcohol amine absorber and the photoresponse agent to light, which significantly enhances the proton transfer during the amine solution regeneration process and strengthens the absorber regeneration efficiency;

[0052] (2) The light-assisted absorber regeneration reactor and carbon dioxide capture system of the present invention use cleaner and pollution-free solar energy as part of the energy supply for the carbon capture project. By efficiently collecting light energy, rationally designing photothermal conversion, and effectively allocating high-quality heat sources, the advantages of photothermal / photocatalytic regeneration and thermal regeneration are coupled to achieve the effects of graded and efficient regeneration of amine liquid, cascaded utilization of energy, and energy conservation and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0054] Figure 1 This is a schematic structural diagram of the light-assisted absorber regeneration device of the present invention;

[0055] Figure 2 This is a schematic diagram of the structure of the carbon dioxide capture system of the present invention;

[0056] Figure 3 It is a top view of the structure of the photocatalytic responder of the present invention;

[0057] Among them, 101, absorption tower; 102, flue gas; 103, decarbonized flue gas; 104, absorption tower rich liquid outlet; 105, absorption tower lean liquid inlet; 201, thermal regeneration tower; 202, thermal regeneration tower rich liquid inlet; 203, thermal regeneration tower rich liquid outlet; 204, thermal regeneration tower carbon dioxide outlet; 302, light regeneration device rich liquid inlet; 303, light regeneration device amine liquid outlet; 304, light regeneration device carbon dioxide outlet; 305, photocatalytic responder; 311, sunlight receiving device; 312, light inlet channel; 313, light collection container; 314, light receiving device; 315, light receiving device; 316, light receiving device; 317, light receiving device; 318, light receiving device; 319, light receiving device; 320, light receiving device; 321, light receiving device; 322, light receiving device; 323, light collecting container; 324, light receiving device; 325, light receiving device; 326, light receiving device; 327, light receiving device; 328, light receiving device; 329, light receiving device; 330, light receiving device; 331, light receiving device; 332, light receiving device; 333, light collecting container; 334, light collecting container; 335, light receiving device; 336, light receiving device; 337, light receiving device; 338, light receiving device; 339, light receiving device; 340, light receiving device; 341, light receiving device; 342, light receiving device; 343, light collecting container; 344, light collecting container; 345, light receiving device; 346, light receiving device; 347, light receiving device; 348, light receiving device; 349, light receiving device; 3 14. First light-transmitting device; 315. Light directional reflection and absorption device; 316. Cavity; 317. Second light-transmitting device; 318. Fluid circulation pipe outlet; 319. Fluid circulation pipe inlet; 321. Photoreaction device cylinder; 322. Heat exchange pipeline; 323. Agitator; 330. Solar concentrating device control box; 401. Heat exchanger; 402. Reboiler; 403. Condenser; 501. Carbon dioxide storage tank; 601. First liquid pump; 602. Second liquid pump; 603. Third liquid pump; 604. Fourth liquid pump; 605. Fan. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Reference Figures 1 to 3The present invention discloses a light-assisted absorber regeneration device, comprising:

[0061] The photoreaction device cylinder 321, one side of the top of the photoreaction device cylinder 321 is connected to the photoregeneration device rich liquid inlet 302, the other side of the top of the photoreaction device cylinder 321 is connected to the photoregeneration device carbon dioxide outlet 304, and the bottom of the photoreaction device cylinder 321 is connected to the photoregeneration device amine liquid outlet 303;

[0062] The photothermal collection device is arranged above the photoreaction device cylinder 321, and the bottom of the photothermal collection device is in optical communication with the photoreaction device cylinder 321;

[0063] The photocatalytic responder 305 is arranged in the middle of the photoreaction device cylinder 321;

[0064] The heat storage circulation device is arranged in the photoreaction device cylinder 321 , and is arranged for heat exchange with the photoreaction device cylinder 321 and the photothermal collection device. The heat storage circulation device is used to move the heat absorbed by the photothermal collection device to the photoreaction device cylinder 321 .

[0065] When in use, light is collected by the photothermal collection device and transmitted to the photoreaction device cylinder 321, providing excitation light energy for the photocatalytic responder 305. At the same time, the heat energy generated by the light is absorbed and transferred to the photoreaction device cylinder 321 through the heat storage circulation device. The rich liquid enters the photoreaction device cylinder 321 through the rich liquid inlet 302 of the photoregeneration device. The amine solvent is regenerated under the combined action of light and heat energy. The carbon dioxide released by the regeneration reaction is discharged from the carbon dioxide outlet 304 of the photoregeneration device, and the lean liquid is discharged from the amine liquid outlet 303 of the photoregeneration device. In this way, the problems of large steam consumption and high energy consumption during desorption of the rich liquid are reduced.

[0066] The photocatalytic responder 305 is arranged in the photoreaction device cylinder 321 by putting the shaped catalyst into a non-woven permeable bag. Since the pores on the non-woven permeable bag are small, the shaped photocatalyst will not flow out of the pores, ensuring that the amine liquid can be immersed in the bag. The agitator 323 can drive the amine liquid and the shaped photoresponse agent to fully contact and regenerate, while effectively reducing the risk of solid sedimentation and pipeline blockage, and extending the system operation life.

[0067] As an optional implementation, the photothermal collection device includes:

[0068] A light collecting container 313, wherein a cavity 316 is provided inside the light collecting container 313, a first light transmitting device 314 is fixedly connected to the top of the light collecting container 313, and a second light transmitting device 317 is fixedly connected to the bottom of the light collecting container 313, and the light collecting container 313 is connected to the light reaction device cylinder 321 through the optical path of the second light transmitting device 317;

[0069] The light inlet channel 312 is arranged on the top of the first light transmitting device 314, and the bottom of the light inlet channel 312 is in optical communication with the top of the first light transmitting device 314;

[0070] The sunlight receiving device 311 is arranged at the top of the light inlet channel 312, and the bottom of the sunlight receiving device 311 is in optical communication with the top of the light inlet channel 312;

[0071] The light directional reflection and absorption device 315 is disposed in the cavity 316. The light directional reflection and absorption device 315 is used to reflect the light entering the cavity 316 multiple times and absorb heat energy.

[0072] As an optional embodiment, it also includes: the light directional reflection and absorption device 315 includes a plurality of corrugated plates arranged in parallel, the corrugated plates are made of mirror stainless steel, the plate surface of the corrugated plates is located in the vertical direction, and the plurality of corrugated plates are fixed in the cavity 316. The plurality of corrugated plates reflect the light entering the cavity 316 multiple times and absorb heat energy.

[0073] The photothermal collection device includes a sunlight receiving device 311, a light inlet channel 312 is arranged below the sunlight receiving device 311, the sunlight receiving device 311 is connected to a light collection container 313 through the light inlet channel 312, the light collection container 313 is a cavity structure, and a first light transmission device 314 is arranged on the upper wall of the light collection container 313. The sunlight received by the sunlight receiving device 311 can enter the light collection container 313 through the light inlet channel 312 and the first light transmission device 314 in turn, and a light directional reflection and absorption device 315 is arranged in the light collection container 313. The collecting device 315 can introduce the light entering the first light-transmitting device 314 into the interior of the cavity of the light collecting container 313 through multiple reflections, and convert the light energy into heat energy. The first light-transmitting device 314 is provided on the lower wall of the light collecting container 313; the first light-transmitting device 314 passing above the light reaction device cylinder 321 is connected to the light collecting container 313, and a cavity is provided in the light reaction device cylinder 321. The light energy introduced into the interior of the cavity of the light collecting container 313 is irradiated to the interior of the light reaction device cylinder 321 through the second light-transmitting device 317, thereby providing excitation light energy for the photocatalytic responder 305.

[0074] As an optional implementation, the heat storage cycle device includes:

[0075] The heat exchange pipeline 322 is arranged in the photoreaction device cylinder 321, and exchanges heat with the liquid in the photoreaction device cylinder 321. The inlet of the heat exchange pipeline 322 is connected to the bottom side of the cavity 316 through the fluid circulation pipe outlet 318, and the outlet of the heat exchange pipeline 322 is connected to the inlet of the fan 605. The outlet of the fan 605 is connected to the other side of the bottom of the cavity 316 through the fluid circulation pipe inlet 319.

[0076] The heat exchange pipeline 322 is spirally embedded in the inner wall of the photoreaction device cylinder 321 in a coil shape. The heat exchange pipeline 322 is filled with a heat storage material, which may be molten salt or water.

[0077] A cavity 316 is provided in the light collecting container 313. The cavity 316 passes through between a plurality of parallelly arranged corrugated plates of the light directional reflection and absorption device 315. The hot end of the cavity 316 is communicated with an outlet 318 of the fluid circulation pipe. The outlet 318 of the fluid circulation pipe is communicated with an inlet of a heat exchange pipeline 322 in the cavity of the light reaction device. A fan 605 capable of driving fluid is connected in series to the outlet of the heat exchange pipeline 322. The fan 605 capable of driving fluid is connected in series to an inlet 319 of the fluid circulation pipe. The inlet 319 of the fluid circulation pipe is communicated with the hot end of the cavity 316.

[0078] The heat energy converted by the light directional reflection and absorption device 315 in the light collection cavity passes through the cavity 316, and then enters the heat exchange pipeline 322 in the photoreaction device cylinder 321 from the fluid circulation pipe outlet 318 to heat the heat storage material. The stored heat energy is realized as heat supply for the amine liquid. The fluid that completes the heat supply is returned to the photoreaction cavity under the action of the fan 605 that can drive the fluid, thereby realizing the collection and transfer of the hot fluid again.

[0079] As an optional implementation, it also includes:

[0080] The stirrer 323 is rotatably disposed at the bottom of the photoreaction device cylinder 321 .

[0081] The stirrer 323 stirs the heated amine liquid and the photocatalytic responder 305 to fully react.

[0082] Furthermore, the photothermal collection device is electrically connected to a solar concentrating device control box 330 .

[0083] The solar light receiving device 311 is electrically connected to the solar focusing device control box 330. The solar focusing device control box 330 is used to adjust the direction of the solar light receiving device 311 according to the angle of sunlight. It includes a solar tracking module and a temperature sensor module, which are responsible for controlling the operating status of the entire light-assisted absorber regeneration system. Under the action of the solar tracking module, the solar light receiving device 311 rotates with the position of the sun, ensuring the time and position of solar irradiation, so that the effect of focusing sunlight is more obvious; the temperature sensor module identifies the temperature in the light collection container 313 and the light reaction device cylinder 321 in real time, ensuring the orderly reaction in the light-assisted absorber regeneration device.

[0084] A carbon dioxide capture system comprises a carbon dioxide absorption device, a heat exchange device and a carbon dioxide regeneration device which are connected to each other, and is also connected to the above-mentioned light-assisted absorbent regeneration device.

[0085] As an optional embodiment, the carbon dioxide absorption device includes:

[0086] Absorption tower 101, flue gas 102 enters from a flue gas inlet at one side of the bottom of the absorption tower 101, and the absorption liquid moves from the absorption tower 101 from top to bottom to absorb carbon dioxide in the flue gas 102 and convert it into decarbonized flue gas 103, and the decarbonized flue gas 103 is discharged from the flue gas outlet at the top of the absorption tower 101, and the absorption liquid is discharged from the absorption tower rich liquid outlet 104 connected to the bottom of the absorption tower 101;

[0087] A first liquid pump 601, the inlet of the first liquid pump 601 is connected to the rich liquid outlet 104 of the absorption tower, the outlet pipeline of the first liquid pump 601 is connected to the rich liquid pipeline inlet of the heat exchange device, and the rich liquid pipeline outlet of the heat exchange device is connected to the rich liquid inlet of the carbon dioxide regeneration device and the rich liquid inlet 302 of the light regeneration device;

[0088] The third liquid pump 603, the inlet of the third liquid pump 603 is connected to the lean liquid pipeline outlet of the heat exchange device, the lean liquid pipeline inlet of the heat exchange device is connected to the lean liquid outlet of the carbon dioxide regeneration device, the outlet of the third liquid pump 603 is connected to the absorption tower lean liquid inlet 105, and the absorption tower lean liquid inlet 105 is connected to the top side of the absorption tower 101.

[0089] As an optional embodiment, the heat exchange device includes a heat exchanger 401, a reboiler 402 and a condenser 403;

[0090] The rich liquid pipeline inlet of the heat exchanger 401 is connected to the outlet of the first liquid pump 601;

[0091] The rich liquid pipeline outlet of the heat exchanger 401 is connected to the rich liquid inlet 302 of the light regeneration device and the rich liquid inlet of the carbon dioxide regeneration device;

[0092] The lean liquid pipeline inlet of the heat exchanger 401 is connected to the lean liquid outlet of the carbon dioxide regeneration device;

[0093] The lean liquid pipeline outlet of the heat exchanger 401 is connected to the inlet of the third liquid pump 603;

[0094] The reboiler 402 is connected to the lean liquid outlet side of the carbon dioxide regeneration device and is used to provide heat for the reaction in the carbon dioxide regeneration device;

[0095] The inlet of the condenser 403 is connected to the carbon dioxide outlet 304 of the light regeneration device and the carbon dioxide outlet of the carbon dioxide regeneration device. The condenser 403 is used to condense water vapor and absorption liquid in the humid carbon dioxide gas. The condensed carbon dioxide gas is transported to the carbon dioxide storage tank 501 through a pipeline, and the condensed liquid is transported to the inlet of the fourth liquid pump 604 through a pipeline. The outlet of the fourth liquid pump 604 is connected to the lean liquid inlet 105 of the absorption tower through a pipeline.

[0096] As an optional embodiment, the carbon dioxide regeneration device includes:

[0097] The thermal regeneration tower 201 is connected to the amine liquid outlet 303 of the optical regeneration device and the rich liquid pipeline outlet of the heat exchanger 401 through the rich liquid inlet 202 of the thermal regeneration tower; the amine liquid outlet 303 of the optical regeneration device is connected to the inlet of the second liquid pump 602, and the outlet of the second liquid pump 602 is connected to the rich liquid inlet 202 of the thermal regeneration tower;

[0098] The top of the heat regeneration tower 201 is connected to the inlet of the condenser 403 through the heat regeneration tower carbon dioxide outlet 204, and the bottom of the heat regeneration tower 201 is connected to the lean liquid pipeline inlet of the heat exchanger 401 through the heat regeneration tower rich liquid outlet 203;

[0099] The reboiler 402 heat exchange is arranged at the bottom of the thermal regeneration tower 201;

[0100] The outlet of the fourth liquid pump 604 is connected to the thermal regeneration tower 201, so as to allow the condensate to flow back into the thermal regeneration tower 201 to participate in thermal regeneration.

[0101] Reference Figure 2 The present invention discloses a reactor for light-assisted absorbent regeneration and a carbon dioxide capture system, comprising: an absorption tower 101, a thermal regeneration tower 201, a light-assisted absorbent regeneration device, a heat exchanger 401, a reboiler 402, a condenser 403, a carbon dioxide storage tank 501, a first liquid pump 601, a second liquid pump 602, a third liquid pump 603, a fourth liquid pump 604, and a fan 605.

[0102] Specifically, the flue gas 102 enters the absorption tower 101, reacts with the absorbent and then is discharged as the decarbonized flue gas 103. The saturated absorbent after absorbing carbon dioxide is discharged through the absorption tower rich liquid outlet 104. The rich phase rich in carbon dioxide passes through the first liquid pump 601 and the heat exchanger 401. The rich liquid after heat exchange is divided into two branches and enters the light-assisted absorbent regeneration device and the thermal regeneration tower 201 for regeneration.

[0103] In branch one, the rich liquid after heat exchange enters the rich liquid inlet 302 of the light regeneration device for preliminary regeneration. The light energy of the light-assisted absorber regeneration device comes from the solar energy collected by the sunlight receiving device 311, and the heat of the reaction comes from the heat energy converted from the light directional reflection and absorption device 315. The agitator 323 stirs the rich liquid and the photocatalytic responder 305 to be fully mixed. The initially regenerated amine liquid is converted into a primary lean phase absorbent after the reaction in the light-assisted absorber regeneration device. The primary lean phase absorbent is discharged through the amine liquid outlet 303 of the light regeneration device, and enters the rich liquid inlet 202 of the thermal regeneration tower through the second liquid pump 602. The primary lean phase absorbent is converted into a secondary lean phase absorbent after the reaction in the thermal regeneration tower 201. The heat of the reaction in the thermal regeneration tower 201 comes from the reboiler 402. The carbon dioxide desorbed by the light-assisted absorbent regeneration device passes through the carbon dioxide outlet 304 of the light regeneration device, and the carbon dioxide desorbed by the thermal regeneration tower 201 passes through the carbon dioxide outlet 204 of the thermal regeneration tower. The desorbed carbon dioxide carries water vapor and is initially condensed by the wire mesh at the top of the regeneration tower. The two streams of initially condensed carbon dioxide continue to pass through the condenser 403 and enter the carbon dioxide storage tank 501. The condensed water and entrained amine liquid collected by the condenser 403 are refluxed to the thermal regeneration tower 201 in the form of a jet through the fourth liquid pump 604 to participate in thermal desorption. The secondary lean phase absorbent that has undergone the secondary desorption process flows from the bottom of the thermal regeneration tower through the heat exchanger 401 and the third liquid pump 603 and flows into the absorption tower 101 for reuse, thus completing the first absorbent absorption-regeneration desorption cycle.

[0104] Branch 2: The rich liquid after heat exchange passes through the rich liquid inlet 202 of the thermal regeneration tower. The heat of the reaction in the thermal regeneration tower 201 comes from the reboiler 402. The desorbed carbon dioxide carries water vapor and is initially condensed by the wire mesh at the top of the regeneration tower. The condensed carbon dioxide continues to pass through the condenser 403 and enters the carbon dioxide storage tank 501. The condensed water and entrained amine liquid collected by the condenser 403 are refluxed to the thermal regeneration tower 201 in the form of a jet through the fourth liquid pump 604 to participate in desorption. The lean phase absorbent is reused from the bottom of the thermal regeneration tower through the heat exchanger 401 and the third liquid pump 603 and flows into the lean liquid inlet 105 of the absorption tower, thus completing the second absorbent absorption-regeneration desorption cycle.

[0105] Branch 1 and branch 2 can be operated independently, or they can be operated simultaneously to achieve full regeneration of the amine solution.

[0106] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do 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 should not be understood as a limitation on the present invention.

[0107] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A light-assisted absorber regeneration device, characterized in that: include: A photoreaction device cylinder (321), wherein one side of the top of the photoreaction device cylinder (321) is connected to a light regeneration device rich liquid inlet (302), the other side of the top of the photoreaction device cylinder (321) is connected to a light regeneration device carbon dioxide outlet (304), and the bottom of the photoreaction device cylinder (321) is connected to a light regeneration device amine liquid outlet (303); A photothermal collection device is arranged above the photoreaction device barrel (321), and the bottom of the photothermal collection device is optically connected to the photoreaction device barrel (321); A photocatalytic responder (305) is arranged in the middle of the photoreaction device cylinder (321); A heat storage circulation device is arranged in the photoreaction device cylinder (321), the heat storage circulation device is arranged for heat exchange with the photoreaction device cylinder (321) and the photothermal collection device, and the heat storage circulation device is used to move heat absorbed by the photothermal collection device into the photoreaction device cylinder (321).

2. A light-assisted absorber regeneration device according to claim 1, characterized in that: The photothermal collection device comprises: A light collection container (313), wherein a cavity (316) is provided inside the light collection container (313), a first light transmission device (314) is fixedly connected to the top of the light collection container (313), and a second light transmission device (317) is fixedly connected to the bottom, and the light collection container (313) is optically connected to the light reaction device cylinder (321) via the second light transmission device (317); A light inlet channel (312) is arranged on the top of the first light transmitting device (314), and the bottom of the light inlet channel (312) is optically connected to the top of the first light transmitting device (314); A sunlight receiving device (311) is arranged at the top of the light intake channel (312), and the bottom of the sunlight receiving device (311) is optically connected to the top of the light intake channel (312); The light directional reflection and absorption device (315) is arranged in the cavity (316), and the light directional reflection and absorption device (315) is used to reflect the light entering the cavity (316) multiple times and absorb heat energy.

3. A light-assisted absorber regeneration device according to claim 2, characterized in that: Also includes: The light directional reflection and absorption device (315) comprises a plurality of corrugated plates arranged in parallel, the corrugated plates are made of mirror-finished stainless steel, the plate surface of the corrugated plates is located in the vertical direction, the plurality of corrugated plates are fixed in the cavity (316), and the plurality of corrugated plates reflect the light entering the cavity (316) multiple times and absorb heat energy.

4. The light-assisted absorber regeneration device according to claim 2, characterized in that: The heat storage cycle device comprises: A heat exchange pipeline (322) is arranged in the barrel (321) of the photoreaction device and exchanges heat with the liquid in the barrel (321) of the photoreaction device. The inlet of the heat exchange pipeline (322) is connected to the bottom side of the cavity (316) through the fluid circulation pipe outlet (318). The outlet of the heat exchange pipeline (322) is connected to the inlet of the fan (605). The outlet of the fan (605) is connected to the other side of the bottom of the cavity (316) through the fluid circulation pipe inlet (319).

5. The light-assisted absorber regeneration device according to claim 1, characterized in that: Also includes: The stirrer (323) is rotatably arranged at the bottom of the photoreaction device cylinder (321).

6. A carbon dioxide capture system, comprising a carbon dioxide absorption device, a heat exchange device and a carbon dioxide regeneration device connected to each other, characterized in that: It is also connected to a light-assisted absorber regeneration device as described in any one of claims 1-5.

7. A carbon dioxide capture system according to claim 6, characterized in that: The carbon dioxide absorption device comprises: An absorption tower (101), wherein flue gas (102) enters from a flue gas inlet at one side of the bottom of the absorption tower (101), an absorption liquid moves from top to bottom of the absorption tower (101) to absorb carbon dioxide in the flue gas (102) and convert it into decarbonized flue gas (103), the decarbonized flue gas (103) is discharged from a flue gas outlet at the top of the absorption tower (101), and the absorption liquid is discharged from an absorption tower rich liquid outlet (104) connected to the bottom of the absorption tower (101); A first liquid pump (601), wherein the inlet of the first liquid pump (601) is connected to the rich liquid outlet (104) pipeline of the absorption tower, the outlet pipeline of the first liquid pump (601) is connected to the rich liquid pipeline inlet of the heat exchange device, and the rich liquid pipeline outlet of the heat exchange device is connected to the rich liquid inlet of the carbon dioxide regeneration device and the rich liquid inlet (302) of the light regeneration device; A third liquid pump (603), wherein the inlet of the third liquid pump (603) is connected to the outlet of the lean liquid pipeline of the heat exchange device, the inlet of the lean liquid pipeline of the heat exchange device is connected to the lean liquid outlet of the carbon dioxide regeneration device, and the outlet of the third liquid pump (603) is connected to the lean liquid inlet (105) of the absorption tower, and the lean liquid inlet (105) of the absorption tower is connected and arranged on one side of the top of the absorption tower (101).

8. A carbon dioxide capture system according to claim 7, characterized in that: The heat exchange device comprises a heat exchanger (401), a reboiler (402) and a condenser (403); The rich liquid pipeline inlet of the heat exchanger (401) is connected to the outlet of the first liquid pump (601); The rich liquid pipeline outlet of the heat exchanger (401) is in communication with the rich liquid inlet (302) of the light regeneration device and the rich liquid inlet of the carbon dioxide regeneration device; The lean liquid pipeline inlet of the heat exchanger (401) is connected to the lean liquid outlet of the carbon dioxide regeneration device; The lean liquid pipeline outlet of the heat exchanger (401) is connected to the inlet of the third liquid pump (603); The reboiler (402) is connected to the lean liquid outlet side of the carbon dioxide regeneration device, and is used to provide heat for the reaction in the carbon dioxide regeneration device; The inlet of the condenser (403) is connected to the carbon dioxide outlet (304) of the optical regeneration device and the carbon dioxide outlet of the carbon dioxide regeneration device. The condenser (403) is used to condense water vapor and absorption liquid in the humid carbon dioxide gas. The condensed carbon dioxide gas is transported to the carbon dioxide storage tank (501) through a pipeline, and the condensed liquid is transported to the inlet of the fourth liquid pump (604) through a pipeline. The outlet of the fourth liquid pump (604) is connected to the lean liquid inlet (105) of the absorption tower through a pipeline.

9. A carbon dioxide capture system according to claim 8, characterized in that: The carbon dioxide regeneration device comprises: A thermal regeneration tower (201), wherein the thermal regeneration tower (201) is connected to the amine liquid outlet (303) of the optical regeneration device and the rich liquid pipeline outlet of the heat exchanger (401) through the thermal regeneration tower rich liquid inlet (202); the amine liquid outlet (303) of the optical regeneration device is connected to the inlet of a second liquid pump (602), and the outlet of the second liquid pump (602) is connected to the rich liquid inlet (202) of the thermal regeneration tower; The top of the thermal regeneration tower (201) is connected to the inlet of the condenser (403) through the thermal regeneration tower carbon dioxide outlet (204), and the bottom of the thermal regeneration tower (201) is connected to the lean liquid pipeline inlet of the heat exchanger (401) through the thermal regeneration tower rich liquid outlet (203); The reboiler (402) heat exchange is arranged at the bottom of the thermal regeneration tower (201); The outlet of the fourth liquid pump (604) is connected to the thermal regeneration tower (201) so as to allow the condensate to flow back into the thermal regeneration tower (201) to participate in thermal regeneration.

Images