Flue gas purification treatment and regeneration tower coupling system

Abstract

The invention provides a flue gas purification treatment and regeneration tower coupling system, the flue gas purification treatment and regeneration tower coupling system comprises a boiler, a flue gas purification assembly, a heat exchange assembly and an air pre-heater, an outlet of the boiler is connected with a tail flue, the flue gas purification assembly comprises a denitration tower, the denitration tower is connected with the tail flue, and the tail flue is connected with the heat exchange assembly. The heat exchange assembly is connected with the denitration tower and located in the denitration tower, a cold side inlet of the heat exchange assembly is connected with a circulation outlet of a heating section of the regeneration tower, the air preheater is provided with a first heat exchange cavity and a second heat exchange cavity, an outlet of the denitration tower is connected with the first pipeline, and at least part of the first heat exchange pipeline is arranged in the first heat exchange cavity. A cold side outlet of the heat exchange assembly is connected with a first end of a second pipeline, a second section of the second pipeline is connected with a circulating inlet of the heating section of the regeneration tower, and at least part of the second pipeline is arranged in the second heat exchange cavity. According to the flue gas purification treatment and regeneration tower coupling system disclosed by the invention, the flowing path of flue gas is optimized, and the stability and the reliability of the system are enhanced.

Description

Technical Field

[0001] The invention relates to the field of flue gas purification, and in particular to a flue gas purification treatment and regeneration tower coupling system. Background Art

[0002] With the increasing attention paid to environmental protection around the world, the purification of industrial flue gas has become a key link in energy conservation and emission reduction. As an important heat conversion equipment in industrial production, the flue gas emitted by boilers contains a large amount of heat. If this part of heat can be effectively recovered, it can not only improve energy utilization efficiency but also reduce environmental pollution. However, due to the characteristics of boiler flue gas and the complexity of industrial structure, there are still certain difficulties in modifying existing equipment to achieve the coupling of flue gas and regeneration tower in terms of compatibility, spatial layout, thermal stress management, etc. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a flue gas purification treatment and regeneration tower coupling system, which optimizes the flow path of the flue gas and enhances the stability and reliability of the system.

[0005] The flue gas purification treatment and regeneration tower coupling system according to an embodiment of the present invention comprises:

[0006] A boiler, the outlet of which is connected to a tail flue;

[0007] A flue gas purification component, the flue gas purification component comprising a denitrification tower, the denitrification tower being connected to the tail flue, so that the flue gas discharged from the boiler passes through the tail flue into the denitrification tower for denitrification;

[0008] A heat exchange component, the heat exchange component is connected to the denitration tower and is located inside the denitration tower, and the cold side inlet of the heat exchange component is connected to the circulation outlet of the heating section of the regeneration tower, so that the heating medium in the heating section of the regeneration tower passes into the heat exchange component from the circulation outlet;

[0009] The air preheater has a first heat exchange chamber and a second heat exchange chamber, the outlet of the denitrification tower is connected to a first pipeline, and at least a portion of the first heat exchange pipeline is placed in the first heat exchange chamber, so that the flue gas discharged from the denitrification tower exchanges heat with a heat exchange medium in the first heat exchange chamber.

[0010] The cold side outlet of the heat exchange component is connected to the first end of the second pipeline, and the second section of the second pipeline is connected to the circulation inlet of the heating section of the regeneration tower. At least a portion of the second pipeline is placed in the second heat exchange cavity so that the heat exchange medium after heat exchange can exchange heat with the heating medium in the second pipeline.

[0011] The flue gas purification treatment and regeneration tower coupling system of the embodiment of the present invention places the heat exchange component inside the denitrification tower, which can realize the heat exchange between the flue gas and the heating medium, improve the heat recovery efficiency, and reduce the space occupation of the system. The air preheater is also used to heat the heat exchange medium again after the heat exchange, so that the temperature of the heating medium reaches the temperature conditions required for the regeneration tower.

[0012] Therefore, the flue gas purification treatment and regeneration tower coupling system of the embodiment of the present invention optimizes the flow path of the flue gas, improves the heat exchange efficiency, reduces the waste of heat energy, reduces the operating cost, and enhances the stability and reliability of the system.

[0013] In some embodiments, the heat exchange component is arranged adjacent to the outlet of the denitrification tower.

[0014] In some embodiments, in a plane orthogonal to the height direction of the denitrification tower, the ratio of the projected area of ​​the heat exchange component to the projected area of ​​the denitrification tower is greater than or equal to 0.3 and less than or equal to 0.7.

[0015] In some embodiments, the flue gas purification treatment and regeneration tower coupling system of the embodiments of the present invention also includes a heating component, which includes a first heater, which is connected to the second pipeline and arranged adjacent to the circulation inlet, and the first heater has a steam inlet for introducing steam into the first heater and utilizing the steam to exchange heat with the heating medium in the second pipeline.

[0016] In some embodiments, the heating assembly further includes a second heater, the second heater is connected to the second pipeline, and the second heater is located downstream of the first heater in the flow direction of the heating medium, and the second heater is an electric heater.

[0017] In some embodiments, the flue gas purification treatment and regeneration tower coupling system of the embodiments of the present invention also includes a first conveying component, which includes a first conveying pipeline and a first conveying member, the first end of the first conveying pipeline is connected to the circulation outlet, the second end of the first conveying pipeline is connected to the cold side inlet of the heat exchange component, and the first conveying member is connected to the first conveying pipeline to drive the flow of heating medium in the first conveying pipeline.

[0018] In some embodiments, the flue gas purification treatment and regeneration tower coupling system of the embodiments of the present invention also includes a second conveying component, the second conveying component includes a second conveying member, and the second conveying member is connected to the air preheater to drive the heat exchange medium in the first heat exchange chamber to flow to the second heat exchange chamber.

[0019] In some embodiments, a control component is further included, wherein the control component includes a control valve, wherein the control valve is disposed at a steam inlet, and the control valve is used to adjust the flow rate of steam entering the first heater by controlling the degree of opening and closing thereof.

[0020] In some embodiments, the control component also includes a first detection component, which is arranged adjacent to the cold side outlet of the first heater, and the control valve is electrically connected to the first detection component, so that the first detection component transmits the detected temperature information of the heating medium at the cold side outlet of the first heater to the control valve, and the control valve adjusts the degree of opening and closing according to the temperature information.

[0021] In some embodiments, the control component also includes a second detection element, which is arranged adjacent to the cold side outlet of the second heater, and the second detection element is electrically connected to the second heater, so that the second detection element transmits the detected temperature information of the heating medium at the cold side outlet of the second heater to the second heater, and the second heater adjusts the heating temperature according to the temperature information. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a flue gas purification treatment and regeneration tower coupling system according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 1. Boiler, 11. Tail flue,

[0025] 2. Denitrification tower,

[0026] 3. Regeneration tower, 31. Circulation outlet, 32. Circulation inlet,

[0027] 4. heat exchange component, 41. first pipeline, 42. second pipeline,

[0028] 5. Air preheater,

[0029] 6. Heating assembly, 61. First heater, 611. Steam inlet, 612. Steam outlet, 62. Expander, 63. Second heater,

[0030] 7. First conveying assembly, 71. First conveying pipeline, 72. First conveying member,

[0031] 8. Second conveying component, 81. First conveying member. DETAILED DESCRIPTION

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

[0033] like Figure 1 As shown, the flue gas purification treatment and regeneration tower coupling system of the embodiment of the present invention includes: a boiler 1, a flue gas purification component, a heat exchange component 4 and an air preheater 5.

[0034] The outlet of the boiler 1 is connected to a tail flue 11. The flue gas purification component includes a denitrification tower 2, which is connected to the tail flue 11 so that the flue gas discharged from the boiler 1 passes through the tail flue 11 into the denitrification tower 2 for denitrification. The heat exchange component 4 is connected to the denitrification tower 2 and is located inside the denitrification tower 2. The cold side inlet of the heat exchange component 4 is connected to the circulation outlet 31 of the heating section of the regeneration tower 3 so that the heating medium in the heating section of the regeneration tower 3 passes into the heat exchange component 4 from the circulation outlet 31. The air preheater 5 has a first heat exchange chamber and a second heat exchange chamber. The outlet of the denitrification tower 2 is connected to the first pipeline 41, and at least a portion of the first heat exchange pipeline is placed in the first heat exchange chamber, so that the flue gas discharged from the denitrification tower 2 exchanges heat with the heat exchange medium in the first heat exchange chamber. The cold side outlet of the heat exchange component 4 is connected to the first end of the second pipeline 42, and the second section of the second pipeline 42 is connected to the circulation inlet 32 ​​of the heating section of the regeneration tower 3. At least a portion of the second pipeline 42 is placed in the second heat exchange chamber, so that the heat exchange medium after heat exchange exchanges heat with the heating medium in the second pipeline 42.

[0035] Specifically, Figure 1 As shown, the flue gas generated by the boiler 1 needs to be discharged after purification treatment, wherein the denitration tower 2 is connected to the tail flue 11 of the boiler 1, and the flue gas discharged from the boiler 1 enters the denitration tower 2 through the tail flue 11 for denitration treatment to remove harmful substances such as nitrogen oxides in the flue gas. In addition, the flue gas purification component also includes a desulfurization tower, a spray tower, an adsorption tower, etc., so as to further remove pollutants in the flue gas. The adsorption tower is connected to the regeneration tower 3 so that the adsorbent in the adsorption tower circulates between the adsorption tower and the regeneration tower 3. The regeneration tower 3 includes a preheating section, a heating section and a cooling section arranged in sequence from top to bottom, so that the adsorbent passed into the regeneration tower 3 can be preheated, heated, parsed and cooled at a preset temperature, and the parsed adsorbent is cooled and passed into the adsorption tower, thereby realizing the reuse of the adsorbent.

[0036] It is understandable that the heat exchange component 4 is connected to the denitration tower 2 and is located inside the denitration tower 2 to avoid occupying the external space of the system. In other words, placing the heat exchange component 4 inside the denitration tower 2 can achieve indirect heat exchange between the flue gas and the heating medium, realize preheating of the heating medium, improve the heat recovery efficiency, and reduce the space occupied by the system.

[0037] In the first heat exchange chamber, part of the first heat exchange tube is placed in the first heat exchange chamber, and the low-temperature heat exchange medium is placed in the first heat exchange chamber so as to exchange heat with the flue gas in the first heat exchange tube placed in the first heat exchange chamber. The heat exchange medium after heat exchange is passed into the second heat exchange chamber so as to indirectly exchange heat with part of the second heat exchange tube in the second heat exchange chamber, thereby heating the heating medium again, so that the temperature of the heating medium after two heatings reaches the required temperature condition for providing the regeneration tower 3.

[0038] That is to say, the flue gas purification treatment and regeneration tower coupling system of the embodiment of the present invention places the heat exchange component 4 inside the denitration tower 2, which can realize the heat exchange between the flue gas and the heating medium, improve the heat recovery efficiency, and reduce the space occupation of the system. The air preheater 5 is also used to heat the heat exchange medium after the heat exchange again, so that the temperature of the heating medium reaches the temperature condition required for providing the regeneration tower 3.

[0039] Therefore, the flue gas purification treatment and regeneration tower coupling system of the embodiment of the present invention optimizes the flow path of the flue gas, improves the heat exchange efficiency, reduces the waste of heat energy, reduces the operating cost, and enhances the stability and reliability of the system.

[0040] Preferably, the heat exchange assembly 4 is arranged adjacent to the outlet of the denitration tower 2. It is understandable that Figure 1 As shown, the heat exchange component 4 is arranged adjacent to the outlet of the denitrification tower 2, on the flow path of the flue gas, to avoid blockage of the flue gas in the denitrification tower 2 and ensure smooth flow of the flue gas.

[0041] In some embodiments, in a plane orthogonal to the height direction of the denitrification tower 2, the ratio of the projected area of ​​the heat exchange component 4 to the projected area of ​​the denitrification tower 2 is greater than or equal to 0.3 and less than or equal to 0.7. It is understandable that the projected area of ​​the heat exchange component 4 is smaller than the projected area of ​​the desulfurization tower, which means that the heat exchange component 4 has an optional heat exchange area to extract heat from the flue gas, thereby improving the heat exchange efficiency. In other words, the design area of ​​the heat exchange component 4 is larger, which can ensure the heat exchange efficiency while avoiding the restriction of flue gas flow caused by excessive resistance, and ensure the flow of flue gas in the denitrification tower 2.

[0042] In addition, since the design area of ​​the heat exchange component 4 allows a certain range of variation, this provides greater flexibility for system design and can be optimized according to actual flue gas temperature, flow rate, composition and other parameters to meet different industrial application requirements.

[0043] In some embodiments, the flue gas purification treatment and regeneration tower coupling system of the embodiments of the present invention also includes a heating component 6, the heating component 6 includes a first heater 61, the first heater 61 is connected to the second pipeline 42 and is arranged adjacent to the circulation inlet 32, the first heater 61 has a steam inlet 611 for introducing steam into the first heater 61, and using the steam to exchange heat with the heating medium in the second pipeline 42.

[0044] Specifically, Figure 1 As shown, one end of the second pipeline 42 is connected to the cold side outlet of the heat exchange component 4, and the other end is connected to the circulation inlet 32 ​​of the heating section of the regeneration tower 3. The first heater 61 is placed in the second pipeline 42, that is, the heating medium will first pass through the first heater 61 before entering the heating section of the regeneration tower 3, and the heating medium will perform advanced heat exchange with the steam passing into the first heater 61 in the first heater 61.

[0045] It is understandable that the steam inlet 611 can come from the steam turbine extraction, and the steam after heat exchange in the first heater 61 is discharged into the expansion tank 62 through the support outlet to facilitate subsequent recycling and reuse. In other words, by using steam as a heat source, the first heater 61 can further increase the heat of the heating medium, so that the heating medium has a higher temperature before entering the heating section of the regeneration tower 3, thereby improving the heat exchange efficiency of the entire system. The steam inlet 611 of the first heater 61 allows the system to control the temperature of the heating medium by adjusting the flow and pressure of the steam, thereby enhancing the adjustment ability and adaptability of the system.

[0046] In addition, the design of the heating component 6 takes into account compatibility with existing systems and can be easily integrated into the existing flue gas purification and regeneration tower 3 coupling system.

[0047] In some embodiments, the heating assembly 6 further includes a second heater 63 , which is connected to the second pipeline 42 and is located downstream of the first heater 61 in the flow direction of the heating medium. The second heater 63 is an electric heater.

[0048] It is understandable that after passing through the first heater 61, the heating medium will continue to flow and enter the second heater 63 for further heating. Of course, the second heater 63 can be used as a supplementary heat source for the first heater 61, that is, if the heating medium itself has reached the heating temperature required by the heating section of the regeneration tower 3 after passing through the first heater 61, the second heater 63 may not work, otherwise the second heater 63 can be used to heat the heating medium again to ensure that the temperature of the heating medium can always reach the temperature required by the heating section of the regeneration tower 3.

[0049] It should be noted that the second heater 63 is an electric heater, which usually has good temperature control performance and can accurately control the temperature of the heating medium to meet strict process requirements. Since the electric heater can quickly adjust the power, the system can quickly respond to changes in external conditions and adapt to different working conditions and thermal energy requirements. In other words, although the first heater 61 uses steam as a heat source, the electric heating function of the second heater 63 can ensure the continuous operation of the system when there is not enough steam or the steam supply is unstable.

[0050] In some embodiments, the flue gas purification treatment and regeneration tower coupling system of the embodiment of the present invention also includes a first conveying component 7, the first conveying component 7 includes a first conveying pipeline 71 and a first conveying member 72, the first end of the first conveying pipeline 71 is connected to the circulation outlet 31, the second end of the first conveying pipeline 71 is connected to the cold side inlet of the heat exchange component 4, and the first conveying member 72 is connected to the first conveying pipeline 71 to drive the flow of heating medium in the first conveying pipeline 71.

[0051] Specifically, Figure 1 As shown, the first end of the first delivery pipeline 71 is connected to the circulation outlet 31 of the heating section of the regeneration tower 3, and the heating medium will flow into the first delivery pipeline 71 after passing through the heating section of the regeneration tower 3. The second end of the first delivery pipeline 71 is connected to the cold side inlet of the heat exchange component 4, and the heating medium is sent to the heat exchange component 4 for heat exchange after passing through the delivery pipeline. The first delivery member 72 is connected to the first delivery pipeline 71, and is used to drive the heating medium in the pipeline to flow, wherein the first delivery member 72 can be a delivery pump or other fluid delivery equipment.

[0052] That is to say, after the heating medium passes through the heating section of the regeneration tower 3, it can be effectively transported to the heat exchange component 4, ensuring the continuous operation of the system and the effective use of heat. The design of the first conveying component 7 helps to maintain the circulation flow of the heating medium in the system and maintain a stable adsorbent regeneration process. In addition, the first conveying member 72 can automatically drive the flow of the heating medium, reduce manual intervention, and improve the automation and operation efficiency of the system. Through the precise control of the conveying component, it can be ensured that the flow of the heating medium in the system is more stable, thereby improving the operation stability of the entire system.

[0053] In some embodiments, the flue gas purification treatment and regeneration tower coupling system of the embodiment of the present invention also includes a second conveying component 8, the second conveying component 8 includes a second conveying member, and the second conveying member is connected to the air preheater 5 to drive the heat exchange medium in the first heat exchange chamber to flow to the second heat exchange chamber.

[0054] Specifically, Figure 1As shown, one end of the second conveying member is connected to the air preheater 5, so that the second conveying member is used to drive the heat exchange medium from the first heat exchange chamber to the second heat exchange chamber. The main function of the second conveying component 8 is to drive the heat exchange medium, that is, to drive the heat exchange medium to flow between the first heat exchange chamber and the second heat exchange chamber. It helps to maintain the continuous operation of the system and ensure that the heat exchange medium can effectively circulate in the air preheater 5.

[0055] It is understandable that, through the drive of the second conveying component 8, the heat exchange medium can absorb the heat of the flue gas in the first heat exchange chamber and then flow to the second heat exchange chamber, where it further exchanges heat with the heating medium, thereby improving the heat exchange efficiency of the entire system. The second driving member can be a delivery pump or other fluid delivery equipment.

[0056] In some embodiments, the flue gas purification treatment and regeneration tower coupling system of the embodiments of the present invention also includes a control component, the control component includes a control valve, the control valve is arranged at the steam inlet 611, and the control valve is used to adjust the flow rate of steam entering the first heater 61 by controlling the opening and closing degree by itself.

[0057] It can be understood that the function of the control valve is to adjust the flow rate and pressure of the steam flow. The control valve is connected to the steam inlet 611, so that the control valve controls the steam flow entering the first heat exchanger by adjusting its own opening and closing degree. In other words, the operator or the automatic control system can adjust the opening of the control valve as needed, thereby achieving precise control of the steam flow.

[0058] In other words, the control valve enables the system operator to adjust the steam flow rate in real time according to the actual working conditions and needs to optimize the heat exchange efficiency and the regeneration effect of the adsorbent. By accurately controlling the steam flow rate, the heat exchange process in the first heat exchanger can be ensured to be more efficient and the heat of the steam can be recovered to the maximum extent. Of course, under different operating conditions, the control valve can be adjusted to adapt to the changing steam temperature, flow rate and composition, improving the adaptability and reliability of the system.

[0059] In some embodiments, the control component also includes a first detection component, which is arranged adjacent to the cold side outlet of the first heater 61, and the control valve is electrically connected to the first detection component, so that the first detection component transmits the detected temperature information of the heating medium at the cold side outlet of the first heater 61 to the control valve, and the control valve adjusts the degree of opening and closing according to the temperature information.

[0060] It is understandable that the first detection element collects the temperature information of the heating medium at the cold side outlet of the first heater 61 and transmits the information electrically to the control valve. The control valve adjusts its opening and closing degree according to the received temperature information, thereby adjusting the flow rate of steam to maintain the temperature of the heating medium within the optimal range.

[0061] In other words, through the coordination of detection parts and control valves, the system can automatically adjust the steam flow and heating temperature, reduce manual intervention, and improve the automation level of the system.

[0062] In some embodiments, the control component also includes a second detection component, which is arranged adjacent to the cold side outlet of the second heater 63, and the second detection component is electrically connected to the second heater 63, so that the second detection component transmits the temperature information of the heating medium at the cold side outlet of the second heater 63 detected to the second heater 63, and the second heater 63 adjusts the heating temperature according to the temperature information.

[0063] It is understandable that the second detection element collects the temperature information of the heating medium at the cold side outlet of the second heater 63 and transmits the information electrically to the second heater 63. The second heater 63 adjusts its own heating temperature according to the received temperature information to ensure that the heating medium reaches the required temperature before entering the regeneration tower 3.

[0064] That is, the control component ensures that the temperature of the heating medium is always kept within the optimal heat exchange range, thereby improving the heat exchange efficiency and reducing the waste of heat energy. The control component can automatically adjust according to different working conditions and heat energy requirements, making the system more adaptable and flexible. In addition, the control component can monitor the temperature of the heating medium to prevent system damage caused by excessively high or low temperatures, thereby improving the safety of the system.

[0065] In the description of the present invention, it is to be understood that 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., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A flue gas purification treatment and regeneration tower coupling system, characterized in that: include: A boiler, the outlet of which is connected to a tail flue; A flue gas purification component, the flue gas purification component comprising a denitrification tower, the denitrification tower being connected to the tail flue, so that the flue gas discharged from the boiler passes through the tail flue into the denitrification tower for denitrification; A heat exchange component, the heat exchange component is connected to the denitration tower and is located inside the denitration tower, and the cold side inlet of the heat exchange component is connected to the circulation outlet of the heating section of the regeneration tower, so that the heating medium in the heating section of the regeneration tower passes into the heat exchange component from the circulation outlet; The air preheater has a first heat exchange chamber and a second heat exchange chamber, the outlet of the denitrification tower is connected to a first pipeline, and at least a portion of the first heat exchange pipeline is placed in the first heat exchange chamber, so that the flue gas discharged from the denitrification tower exchanges heat with a heat exchange medium in the first heat exchange chamber. The cold side outlet of the heat exchange component is connected to the first end of the second pipeline, and the second section of the second pipeline is connected to the circulation inlet of the heating section of the regeneration tower. At least a portion of the second pipeline is placed in the second heat exchange cavity so that the heat exchange medium after heat exchange can exchange heat with the heating medium in the second pipeline.

2. The flue gas purification treatment and regeneration tower coupling system according to claim 1, characterized in that: The heat exchange component is arranged adjacent to the outlet of the denitration tower.

3. The flue gas purification treatment and regeneration tower coupling system according to claim 2 is characterized in that: In a plane orthogonal to the height direction of the denitrification tower, the ratio of the projected area of ​​the heat exchange component to the projected area of ​​the denitrification tower is greater than or equal to 0.3 and less than or equal to 0.

7.

4. The flue gas purification treatment and regeneration tower coupling system according to claim 3 is characterized in that: It also includes a heating component, which includes a first heater. The first heater is connected to the second pipeline and is arranged adjacent to the circulation inlet. The first heater has a steam inlet for introducing steam into the first heater and utilizing the steam to exchange heat with the heating medium in the second pipeline.

5. The flue gas purification treatment and regeneration tower coupling system according to claim 4, characterized in that: The heating assembly further includes a second heater, which is connected to the second pipeline and is located downstream of the first heater in the flow direction of the heating medium. The second heater is an electric heater.

6. The flue gas purification treatment and regeneration tower coupling system according to claim 5, characterized in that: It also includes a first conveying component, which includes a first conveying pipeline and a first conveying member. The first end of the first conveying pipeline is connected to the circulation outlet, the second end of the first conveying pipeline is connected to the cold side inlet of the heat exchange component, and the first conveying member is connected to the first conveying pipeline to drive the flow of heating medium in the first conveying pipeline.

7. The flue gas purification treatment and regeneration tower coupling system according to claim 6, characterized in that: It also includes a second conveying component, which includes a second conveying member. The second conveying member is connected to the air preheater to drive the heat exchange medium in the first heat exchange chamber to flow to the second heat exchange chamber.

8. The flue gas purification treatment and regeneration tower coupling system according to claim 7, characterized in that: It also includes a control component, which includes a control valve. The control valve is arranged at the steam inlet, and the control valve is used to adjust the flow of steam entering the first heater by controlling the opening and closing degree of the control valve itself.

9. The flue gas purification treatment and regeneration tower coupling system according to claim 8, characterized in that: The control component also includes a first detection component, which is arranged adjacent to the cold side outlet of the first heater, and the control valve is electrically connected to the first detection component, so that the first detection component transmits the detected temperature information of the heating medium at the cold side outlet of the first heater to the control valve, and the control valve adjusts the opening and closing degree according to the temperature information.

10. The flue gas purification treatment and regeneration tower coupling system according to claim 9, characterized in that: The control component also includes a second detection component, which is arranged adjacent to the cold side outlet of the second heater and is electrically connected to the second heater so that the second detection component transmits the detected temperature information of the heating medium at the cold side outlet of the second heater to the second heater, and the second heater adjusts the heating temperature according to the temperature information.

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