A carbon capture system integrating desulfurization and denitrification

Abstract

The application provides a carbon capture system integrating desulfurization and denitrification, which comprises a cooling tower, a desulfurization and denitrification unit, an absorption unit, a regeneration unit and a storage unit, the cooling tower has a cooling area, the desulfurization and denitrification unit is connected with a boiler and is arranged in the cooling area, the desulfurization and denitrification unit comprises a reactor, a circulating part and a heat exchange part, the reactor is connected with the boiler, so that flue gas discharged from the boiler can enter the reactor, the circulating part is connected with the reactor, the circulating part is connected with the heat exchange part, the absorption unit is connected with the reactor, so as to receive the flue gas and use an absorbent to absorb carbon dioxide in the flue gas, the regeneration unit is connected with the absorption unit, so that the absorbent in the absorption unit is sent to the regeneration unit for regeneration after absorbing the carbon dioxide, and the storage unit is connected with the regeneration unit, so as to store the gas discharged from the regeneration unit. The carbon capture system integrating desulfurization and denitrification reduces long-distance erection of a conveying pipeline, avoids waste of cold and heat, and improves overall efficiency.

Description

Technical Field

[0001] This invention relates to the field of carbon capture technology, and more specifically, to an integrated desulfurization and denitrification carbon capture system. Background Technology

[0002] Emissions of sulfides and nitrogen oxides are key factors in air pollution. Industrially, nitrogen oxide removal mainly employs the following methods: Selective Catalytic Reduction (SCR), Selective Non-Catalytic Reduction (SNCR), a combined SNCR-SCR method, liquid oxidation absorption, microbial methods, activated carbon adsorption, and electron beam methods. The first three methods are currently the most widely used industrial methods globally. However, each method has its drawbacks. SCR is currently the most commonly used denitrification method, offering high denitrification efficiency and low secondary pollution, but it requires significant equipment investment, catalysts, and has high operating and maintenance costs. SNCR has lower investment and operating costs, but lower denitrification efficiency. For sulfides (such as sulfur dioxide), the wet limestone-gypsum desulfurization process is mainly used, but it is prone to scaling and clogging within the desulfurization tower and pipelines.

[0003] In related technologies, carbon capture processes require towers including: denitrification towers, desulfurization towers, scrubbing towers, absorption towers, regeneration towers, cooling towers, and related equipment connecting the towers for circulation. However, the numerous towers in these carbon capture processes result in a large footprint for the entire system. The transport of materials between adjacent towers via pipelines is long, leading to extended pipeline distances, extended material transport times, and a susceptibility to pipeline blockages, ultimately reducing overall efficiency. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose an integrated desulfurization and denitrification carbon capture system. This integrated system combines the desulfurization and denitrification unit with a cooling tower, reducing the need for long-distance pipeline installations, avoiding waste of cooling and heating energy, and improving overall efficiency.

[0005] The integrated desulfurization and denitrification carbon capture system of the present invention includes:

[0006] Cooling tower, the cooling tower having a cooling zone;

[0007] A desulfurization and denitrification unit is provided, which is connected to the boiler and located within the cooling zone. The unit includes a reactor, a circulation component, and a heat exchanger. The reactor is connected to the boiler so that flue gas from the boiler can enter the reactor. The circulation component is connected to the reactor to circulate the reactant within the reactor between the reactor and the circulation component.

[0008] The circulation component is connected to the heat exchange component so as to exchange heat with the heat or cold energy introduced into the heat exchange component.

[0009] An absorption unit, connected to the reactor, is used to receive flue gas and utilize an absorbent to absorb carbon dioxide in the flue gas.

[0010] A regeneration unit is connected to the absorption unit so that the absorbent in the absorption unit absorbs carbon dioxide and is then passed into the regeneration unit for absorbent regeneration.

[0011] A sealing unit, connected to the regeneration unit, is used to seal the gas discharged by the regeneration unit.

[0012] The desulfurization and denitrification integrated carbon capture system of the present invention sets the desulfurization and denitrification unit inside the cooling tower, which not only reduces the overall footprint of the system, but also shortens the connection distance of equipment pipelines and reduces the heat dissipation load of heat preservation or cold preservation.

[0013] In some embodiments, the heat exchanger includes a first heat exchange section and a second heat exchange section, and the circulation section includes a first heat exchange tube and a second heat exchange tube. The first heat exchange tube is connected to the first heat exchange section, and the second heat exchange tube is connected to the second heat exchange section. The first heat exchange section is used to introduce cold energy, and the second heat exchange section is used to introduce heat energy.

[0014] In some embodiments, the first heat exchange section has a cold inlet and a cold outlet, the cold inlet being connected to the cooling tower so that the cold energy generated by the cooling tower can be introduced into the first heat exchange section through the cold inlet.

[0015] In some embodiments, the cooling tower includes a tower body and a cooling unit, the cooling unit being connected to the tower body and located at the bottom of the tower body, and the cooling unit being connected to the cold energy outlet and the cold energy inlet for introducing cold energy into the first heat exchange section.

[0016] In some embodiments, the cooling unit includes a plurality of cooling sidewalls arranged circumferentially around the tower body, with a cooling gap defined between two adjacent cooling sidewalls to allow outside air to enter the tower body through the cooling gap. Each cooling sidewall has a cavity in which a cooling coil is provided. The cooling coil is used to introduce a cooling medium. The inlet and outlet of the cooling coil are connected to the cold air outlet and the cold air inlet, respectively. The cooling medium circulates between the cooling coil and the first heat exchange section for heat exchange in the first heat exchange tube within the first heat exchange section.

[0017] In some embodiments, the second heat exchange section has a heat inlet and a heat outlet. The heat inlet is connected to the regeneration outlet of the regeneration tower, and the heat outlet is connected to the storage unit, so that the regeneration gas discharged from the regeneration outlet of the regeneration tower enters the second heat exchange section through the heat inlet, exchanges heat with the second heat exchange tube in the second heat exchange section, and then enters the storage unit through the heat outlet for storage.

[0018] In some embodiments, the second heat exchange section has a second heat inlet and a second heat outlet. The second heat inlet is connected to the outlet of the boiler, and the second heat outlet is connected to the cooler, so that the flue gas discharged from the boiler enters the second heat exchange section through the second heat inlet, exchanges heat with the second heat exchange tube in the second heat exchange section, and then enters the cooler through the second heat outlet.

[0019] In some embodiments, a first control valve and a second control valve are further included. The first control valve is installed at the cold inlet to control the flow rate of the cold inlet, and the second control valve is installed at the heat inlet to control the flow rate of the heat inlet.

[0020] In some embodiments, the desulfurization and denitrification integrated carbon capture system of the present invention further includes an absorbent heat exchanger, which is connected to both the absorption tower and the regeneration tower, so that the saturated absorbent discharged from the absorption tower and the regenerated absorbent discharged from the regeneration tower exchange heat in the absorbent heat exchanger and are then respectively introduced into the regeneration tower and the absorption tower.

[0021] In some embodiments, a cooling element is provided on the pipe connecting the absorbent heat exchanger and the regeneration tower, and the cooling element is connected to the cooling tower so that the cooling tower can pass cold energy into the cooling element. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the integrated desulfurization and denitrification carbon capture system according to an embodiment of the present invention.

[0023] Figure label:

[0024] 100. Boiler

[0025] 1. Cooling tower

[0026] 2. Desulfurization and denitrification unit; 21. Reactor; 22. Circulation component; 221. First heat exchange tube; 222. Second heat exchange tube; 23. Heat exchange component; 231. First heat exchange section; 232. Second heat exchange section.

[0027] 3. Absorption unit,

[0028] 4. Regeneration unit,

[0029] 5. Sealing unit,

[0030] 6. Absorbent heat exchanger,

[0031] 7. Cooling components. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] like Figure 1 As shown, the integrated desulfurization and denitrification carbon capture system of the present invention includes: a cooling tower 1, a desulfurization and denitrification unit 2, an absorption unit 3, a regeneration unit 4, and a storage unit 5.

[0034] Cooling tower 1 has a cooling zone. Desulfurization and denitrification unit 2 is connected to boiler 100 and located within the cooling zone. Desulfurization and denitrification unit 2 includes a reactor 21, a circulation component 22, and a heat exchanger 23. Reactor 21 is connected to boiler 100 so that flue gas discharged from boiler 100 can enter reactor 21. Circulation component 22 is connected to reactor 21 to circulate the reactant within reactor 21 between reactor 21 and circulation component 22. Circulation component 22 is connected to heat exchanger 23 to exchange heat or cold with the heat entering heat exchanger 23. Absorption unit 3 is connected to reactor 21 to receive flue gas and utilize absorbent to absorb carbon dioxide in the flue gas. Regeneration unit 4 is connected to absorption unit 3 so that the absorbent in absorption unit 3 absorbs carbon dioxide and is then passed into regeneration unit 4 for absorbent regeneration. Storage unit 5 is connected to regeneration unit 4 to store the gas discharged from regeneration unit 4.

[0035] Specifically, such as Figure 1 As shown, the internal space of cooling tower 1 is the cooling zone. Reactor 21 is used for desulfurization and denitrification reactions to remove sulfur dioxide and nitrogen oxides from flue gas. Circulation unit 22 circulates the reactant (such as limestone slurry or urea solution) between reactor 21 and circulation unit 22, ensuring uniform distribution and effective reaction of the reactant. Heat exchanger 23 is connected to circulation unit 22 and is used to exchange heat with the reactant within circulation unit 22, maintaining the reactant within a suitable temperature range.

[0036] Absorption unit 3 receives flue gas and uses an absorbent (such as an alkaline solution or organic amine solution) to absorb pollutants in the flue gas, reducing harmful gas emissions. Regeneration unit 4 is connected to absorption unit 3, recovering and regenerating the absorbent after reaction with the flue gas, allowing it to be reused. That is, the reacted absorbent is passed into regeneration unit 4 and heated to release carbon dioxide. Then, cooling restores the absorbent to a usable state, achieving reuse. Storage unit 5 is connected to regeneration unit 4 and is used to store the gas discharged from regeneration unit 4. This gas typically contains carbon dioxide and requires safe storage or further treatment.

[0037] Understandably, after undergoing a series of treatments including desulfurization, denitrification, absorption, and regeneration, the flue gas can meet emission standards, while simultaneously achieving resource recycling and reducing environmental impact. The cooling zone within cooling tower 1 provides the necessary cooling environment for the flue gas, helping to improve desulfurization and denitrification efficiency while reducing system energy consumption.

[0038] In other words, the desulfurization and denitrification integrated carbon capture system of the present invention sets the desulfurization and denitrification unit 2 inside the cooling tower 1, which not only reduces the overall footprint of the system, but also shortens the connection distance of the equipment pipelines and reduces the heat dissipation load of heat preservation or cold preservation.

[0039] In some embodiments, the heat exchanger 23 includes a first heat exchange section 231 and a second heat exchange section 232, and the circulation section 22 includes a first heat exchange tube 221 and a second heat exchange tube 222. The first heat exchange tube 221 is connected to the first heat exchange section 231, and the second heat exchange tube 222 is connected to the second heat exchange section 232. The first heat exchange section 231 is used to introduce cold energy, and the second heat exchange section 232 is used to introduce heat energy.

[0040] Specifically, such as Figure 1 As shown, the first heat exchange section 231 and the second heat exchange section 232 are arranged sequentially along the direction of flue gas flow, with the first heat exchange section 231 located above the second heat exchange section 232. Both the first heat exchange tube 221 and the second heat exchange tube 222 are equipped with heat exchange pumps for extracting the reaction solution from the reactor 21, respectively.

[0041] Understandably, the flue gas emitted from boiler 100 is introduced into the bottom of reactor 21. Inside reactor 21, the flue gas flows from bottom to top. A reaction solution is introduced into the first heat exchange tube 221 and the second heat exchange tube so that the reaction solution can react with the flue gas and remove sulfur dioxide and nitrogen oxides from the flue gas (i.e., achieve denitrification and desulfurization of the flue gas).

[0042] It should be noted that the denitrification reaction temperature is generally between 300-400℃, while the desulfurization reaction temperature is generally between 100-160℃. To ensure the reaction temperature, the temperature of the reaction solution in the first heat exchange tube 221 and the second heat exchange tube needs to be controlled separately to prevent the temperature from rising during the reaction process and affecting the reaction effect.

[0043] In some embodiments, the first heat exchange section 231 has a cold inlet and a cold outlet. The cold inlet is connected to the cooling tower 1 so that the cold energy generated by the cooling tower 1 can be introduced into the first heat exchange section 231 through the cold inlet.

[0044] It is understandable that the cooling tower 1 can be either an air-cooled tower or a water-cooled tower. When outside air enters the cooling tower 1, it can cool the heat exchange medium, and then the heat exchange medium is used to cool the first heat exchange section 231.

[0045] Optionally, the cooling tower 1 includes a tower body and a cooling unit. The cooling unit is connected to the tower body and located at the bottom of the tower body. The cooling unit is connected to a cold energy outlet and a cold energy inlet for introducing cold energy into the first heat exchange section 231.

[0046] It is understandable that cooling tower 1 is an air-cooled tower. Outside air exchanges heat with the cooling unit through the bottom of cooling tower 1, which lowers the temperature of the cooling medium in the cooling unit to the ambient temperature. The cooling medium is then introduced into the first cooling section so that the first heat exchange tube 221 can perform indirect heat exchange.

[0047] In some embodiments, the cooling unit includes a plurality of cooling sidewalls, which are arranged circumferentially around the tower body. A cooling gap is defined between two adjacent cooling sidewalls to allow outside air to enter the tower body through the cooling gap. The cooling sidewalls have cavities, and cooling coils are provided in the cavities. The cooling coils are used to introduce cooling medium. The inlet and outlet of the cooling coils are connected to the cold air outlet and the cold air inlet, respectively. The cooling medium circulates between the cooling coils and the first heat exchange section 231 for heat exchange in the first heat exchange section 231 through the first heat exchange tube 221.

[0048] Understandably, outside air enters the cooling tower 1 through the cooling gap and exchanges heat with the cooling sidewalls on both sides of the cooling gap, causing the temperature of the cooling coils located in the cooling sidewalls to decrease and approach the ambient temperature. The cooling medium after heat exchange with the first cooling pipe is then passed into the first heat exchange section 231 and exchanges heat with the first heat exchange pipe 221, thereby achieving the cooling of the first heat exchange pipe 221.

[0049] In some embodiments, the second heat exchange section 232 has a heat inlet and a heat outlet. The heat inlet is connected to the regeneration outlet of the regeneration tower, and the heat outlet is connected to the storage unit 5, so that the regeneration gas discharged from the regeneration outlet of the regeneration tower enters the second heat exchange section 232 through the heat inlet, exchanges heat with the second heat exchange tube 222 in the second heat exchange section 232, and then enters the storage unit 5 through the heat outlet for storage.

[0050] Understandably, the regenerated gas discharged from the regeneration tower still possesses a certain amount of heat. Utilizing this heat to heat the second heat exchange tube 222 within the second heat exchange section 232 not only lowers the temperature of the heat exchange medium within the tube 222 but also facilitates subsequent processing and storage of the regenerated gas. Furthermore, by exchanging heat between the regenerated gas and the second heat exchange tube 222, the heat in the regenerated gas can be recovered and used to heat other processes or media, thereby improving energy efficiency.

[0051] In some embodiments, the second heat exchange section 232 has a second heat inlet and a second heat outlet. The second heat inlet is connected to the outlet of the boiler 100, and the second heat outlet is connected to the cooler, so that the flue gas discharged from the boiler 100 enters the second heat exchange section 232 through the second heat inlet, exchanges heat with the second heat exchange tube 222 in the second heat exchange section 232, and then enters the cooler through the second heat outlet.

[0052] It is understandable that, such as Figure 1 As shown, boiler 100 burns fuel to produce high-temperature flue gas, which contains heat and is a potential source of thermal energy. The outlet of boiler 100 is connected to the second heat inlet of the second heat exchange section 232, introducing the flue gas into the second heat exchange section 232 so that the flue gas can exchange heat with the second heat exchange tube 222 in the second heat exchange section 232.

[0053] In other words, the flue gas discharged from boiler 100 exchanges heat with the second heat exchange tube 222 in the second heat exchange section 232, recovering heat from the flue gas, which can be used to heat other processes or media, improving energy utilization efficiency. Exchanging heat between the flue gas and the second heat exchange tube 222 lowers the temperature of the flue gas after releasing heat, which is beneficial for subsequent treatment and emissions. The cooled flue gas is further cooled by a cooler, reducing thermal pollution to the environment and also facilitating the control of pollutants in the flue gas.

[0054] It should be noted that the desulfurization and denitrification integrated carbon capture system of the present invention can be controlled according to the temperature of the heat exchange medium in the second heat exchange tube 222. That is, if it is necessary to raise the temperature of the heat exchange medium in the second heat exchange tube 222, the flue gas can be used to heat the second heat exchange tube 222; if it is necessary to cool the heat exchange medium in the second heat exchange tube 222, the regeneration gas can be used to heat the second heat exchange tube 222.

[0055] In some embodiments, the desulfurization and denitrification integrated carbon capture system of the present invention further includes a first control valve and a second control valve. The first control valve is installed at the cold inlet to control the flow rate of the cold inlet, and the second control valve is installed at the heat inlet to control the flow rate of the heat inlet.

[0056] Understandably, there are two second control valves, one of which is installed at the first heat inlet and the other at the second heat inlet, to control the flow rate of the first and second heat inlets respectively.

[0057] In some embodiments, the desulfurization and denitrification integrated carbon capture system of the present invention further includes an absorbent heat exchanger 6, which is connected to both the absorption tower and the regeneration tower, so that the saturated absorbent discharged from the absorption tower and the regenerated absorbent discharged from the regeneration tower exchange heat in the absorbent heat exchanger 6 and are then respectively introduced into the regeneration tower and the absorption tower.

[0058] It is understandable that, such as Figure 1 As shown, the saturated absorbent after reacting with the flue gas in the absorption tower is passed into a heat exchanger and exchanges heat with the regenerated absorbent discharged from the regeneration tower. This raises the temperature of the saturated absorbent, which is beneficial for its regeneration. It also lowers the temperature of the regenerated absorbent, which is beneficial for the regeneration of the absorbent and for the re-reaction of the absorbent with the flue gas. This not only realizes the reuse of the absorbent, but also improves the conditions for better reaction of the absorbent in the regeneration tower and in the absorption tower.

[0059] In some embodiments, a cooling element 7 is provided on the pipe connecting the absorbent heat exchanger 6 and the regeneration tower. The cooling element 7 is connected to the cooling tower 1 so that the cooling tower 1 can pass cold energy into the cooling element 7.

[0060] It is understandable that the cooling element 7 can be used to cool the regeneration gas discharged from the regeneration tower, so as to facilitate the subsequent storage and other treatment of the regeneration gas.

[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A carbon capture system integrated with desulfurization and denitrification, characterized in that, The application relates to a flue gas desulfurization and denitrification system. The system comprises: a cooling tower having a cooling area; a desulfurization and denitrification unit connected with a boiler and arranged in the cooling area, the desulfurization and denitrification unit comprising a reactor connected with the boiler so that flue gas discharged from the boiler can enter the reactor, a circulating member connected with the reactor for circulating a reagent in the reactor between the reactor and the circulating member, the circulating member being connected with a heat exchange member for heat exchange with heat or cold entering the heat exchange member; an absorption unit connected with the reactor for receiving flue gas and absorbing carbon dioxide in the flue gas by using an absorbent; a regeneration unit connected with the absorption unit for regenerating the absorbent after the absorbent absorbs carbon dioxide in the absorption unit; a storage unit connected with the regeneration unit for storing gas discharged from the regeneration unit; the heat exchange member comprising a first heat exchange part and a second heat exchange part, and the circulating member comprising a first heat exchange pipe and a second heat exchange pipe, the first heat exchange pipe being connected with the first heat exchange part, and the second heat exchange pipe being connected with the second heat exchange part, the first heat exchange part being used for entering cold, and the second heat exchange part being used for entering heat; the first heat exchange part having a cold inlet and a cold outlet, the cold inlet being connected with the cooling tower so that cold generated by the cooling tower can enter the first heat exchange part through the cold inlet; 2. The integrated desulfurization and denitration carbon capture system according to claim 1, wherein, the cooling tower comprising a tower body and a cooling unit connected with the tower body and arranged at the bottom of the tower body, the cooling unit being connected with the cold outlet and the cold inlet for entering cold into the first heat exchange part.

3. The integrated desulfurization and denitrification carbon capture system of any one of claims 1-2, wherein, The cooling unit comprises a plurality of cooling side walls arranged at intervals along the circumference of the tower body, cooling gaps being defined between adjacent cooling side walls so that external air can enter the tower body through the cooling gaps, the cooling side walls having cavities, cooling coils being arranged in the cavities, the cooling coils being used for entering cooling medium, the inlet and outlet of the cooling coils being connected with the cold outlet and the cold inlet respectively, and the cooling medium circulating between the cooling coils and the first heat exchange part for heat exchange in the first heat exchange pipe. The second heat exchange part has a first heat inlet and a first heat outlet, the first heat inlet being connected with a regeneration outlet of the regeneration unit, and the first heat outlet being connected with the storage unit, so that regenerated gas discharged from the regeneration outlet of the regeneration unit enters the second heat exchange part through the first heat inlet, and exchanges heat with the second heat exchange pipe in the second heat exchange part and then enters the storage unit through the first heat outlet for storage.

4. The integrated desulfurization and denitrification carbon capture system of claim 3, wherein, The second heat exchange part has a second heat inlet and a second heat outlet, the second heat inlet is connected with the outlet of the boiler, and the second heat outlet is connected with the cooler, so that the flue gas discharged by the boiler enters the second heat exchange part through the second heat inlet, exchanges heat with the second heat exchange tube in the second heat exchange part, and then enters the cooler through the second heat outlet.

5. The integrated desulfurization and denitrification carbon capture system of claim 4, wherein, The first control valve is installed at the cold inlet to control the flow rate of the cold inlet, and the second control valve is installed at the first heat inlet and the second heat inlet to control the flow rate of the first heat inlet and the second heat inlet.

6. The integrated desulfurization and denitrification carbon capture system of claim 1, wherein, An absorbent heat exchanger is further included, which is connected with the absorption unit and the regeneration unit, so that the saturated absorbent discharged by the absorption unit and the regenerated absorbent discharged by the regeneration unit exchange heat in the absorbent heat exchanger and then enter the regeneration unit and the absorption unit, respectively.

7. The integrated desulfurization and denitrification carbon capture system of claim 6, wherein, A cooling member is further arranged on the pipeline connected between the absorbent heat exchanger and the regeneration unit, and the cooling member is connected with the cooling tower, so that the cooling tower can supply cold to the cooling member.

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