A desulfurized flue gas heating desulfurization structure and method

Abstract

This application relates to the field of desulfurization flue gas treatment technology, and discloses a structure and method for heating and desulfurizing desulfurized flue gas. The structure includes a heating pipe, a steam generating assembly, a steam release assembly, a condensation heat exchange assembly, and a condensate recovery assembly. A separate steam generating space and a recovery channel are formed within the heating pipe. The steam generating assembly converts liquid into steam, and the steam release assembly releases the steam into the desulfurization flue gas flow path. After heat exchange with the desulfurization flue gas and the heat exchange condensation surface, condensate is formed. The condensate enters the recovery channel through a collection port and is guided to the outlet by a flow guiding structure. This application can improve the sufficiency of heating the desulfurization flue gas and simultaneously adsorb and remove residual sulfur-containing components and particulate matter.

Description

Technical Field

[0001] This application relates to the field of desulfurization flue gas treatment technology, specifically to a structure and method for heating and desulfurizing desulfurized flue gas. Background Technology

[0002] After desulfurization, flue gas from power plant boilers typically requires further heating based on emission, transportation, or subsequent process requirements to prevent low flue gas temperatures from affecting emission stability or the operation of downstream equipment. Existing desulfurization flue gas heating structures often employ heating pipes, heat exchange tubes, and other components arranged within the flue gas flow path, allowing the desulfurized flue gas to flow through the outer side of the heating structure and exchange heat with its surface.

[0003] However, conventional heating tubes primarily rely on indirect heat exchange between the tube wall surface and the flue gas. The contact between the flue gas and the heating structure is relatively simple, resulting in insufficient heat transfer and potentially causing uneven heating in different areas, thus affecting the overall heating efficiency and uniformity of the desulfurized flue gas. Furthermore, the desulfurized flue gas may still contain small amounts of residual sulfur-containing components and particulate matter. Simple heating structures typically only provide heating and cannot simultaneously capture or remove these residual components during the flue gas heating process. Adding separate spray, filtration, or collection equipment would further increase the complexity of the equipment layout and the cost of operation and maintenance.

[0004] Therefore, it is necessary to improve the flue gas heating structure to enhance the heating efficiency and uniformity of the flue gas while also addressing the treatment needs of residual sulfur-containing components and particulate matter. Summary of the Invention

[0005] The purpose of this application is to provide a desulfurization flue gas heating and desulfurization structure and method to overcome the technical problems of insufficient flue gas heating efficiency and heating uniformity due to the single heat exchange mode of the existing desulfurization flue gas heating structure, and the difficulty in simultaneously treating residual sulfur-containing components and particulate matter.

[0006] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, this application provides a desulfurization flue gas heating and desulfurization structure, comprising: A heating tube is installed in the desulfurization flue gas flow path, and the heating tube has a steam generation space and a recovery channel that are separated from each other. A steam generating assembly is disposed within the steam generating space, the steam generating assembly being used to generate steam from liquid entering the steam generating space; A steam release component is disposed on the tube wall of the heating tube, and the steam generation space is connected to the desulfurization flue gas flow path through the steam release component; A condensing heat exchange component is disposed outside the heating tube. The condensing heat exchange component includes a heat exchange condensing surface, which is located in the desulfurization flue gas flow path. A condensate recovery assembly includes a collection port and a flow guiding structure. The collection port is located on the wall of the heating tube and communicates with the recovery channel. The collection port is spaced apart from the vapor release assembly and faces the heat exchange condensation surface. The recovery channel has an outlet end. The flow guiding structure is located in the recovery channel and guides the condensate collected at the collection port to the outlet end.

[0007] Optionally, a baffle is provided inside the cavity of the heating tube, which separates the steam generation space and the recovery channel from each other.

[0008] Optionally, the steam generating component is a heating element disposed within the steam generating space.

[0009] Optionally, the steam release component is a steam release port that penetrates the wall of the heating tube, and the steam release port is formed in the tube wall region of the heating tube corresponding to the steam generation space.

[0010] Optionally, the condensation heat exchange component is a heating fin disposed on the outside of the heating tube, and the heat exchange condensation surface is formed on the surface of the heating fin.

[0011] Optionally, the vapor release direction of the vapor release component is toward the area where the heating fin is located.

[0012] Optionally, the liquid collection port is located on the pipe wall of the heating pipe on the side corresponding to the recovery channel, and the liquid collection port is located above the vapor release component in the height direction of the heating pipe.

[0013] Optionally, the flow guiding structure has an inclined bottom surface, which is formed within the recovery channel and gradually decreases from the area where the liquid collection port is located to the liquid outlet end.

[0014] Optionally, a side slope is formed on the outer side of the heating tube, the side slope is located around the liquid collection port and is inclined toward the liquid collection port.

[0015] Secondly, this application also provides a method for heating and desulfurizing desulfurized flue gas, implemented based on the desulfurization and desulfurization structure described in any of the above claims, wherein the method includes: Liquid is supplied into the steam generating space, and the liquid is heated to form steam by the steam generating assembly; The steam is released into the desulfurization flue gas flow path through the steam release component, and the steam exchanges heat with the desulfurization flue gas; After heat exchange, the steam forms condensate on the heat exchange and condensation surface of the condensation heat exchange component, and the condensate adsorbs residual sulfur-containing components and / or particulate matter in the desulfurization flue gas. The condensate enters the recovery channel through the collection port; The condensate entering the recovery channel is directed to the outlet end by the flow guiding structure.

[0016] Compared with the prior art, this application has the following beneficial effects: Firstly, this application provides a desulfurization flue gas heating and desulfurization structure. By forming separate steam generation spaces and recovery channels within the heating tube cavity, the steam generation process and condensate recovery process are carried out in separate zones within the same heating tube. The steam generation component generates steam from liquid within the steam generation space, and the steam release component allows the steam to enter the desulfurization flue gas flow path, increasing the heat exchange contact between the desulfurization flue gas and the heating medium, thereby improving the heating efficiency and uniformity of the desulfurization flue gas. By setting a heat exchange condensation surface located in the desulfurization flue gas flow path, the steam can form condensate after heat exchange with the desulfurization flue gas, providing conditions for residual sulfur-containing components and particulate matter to be carried out with the condensate. The collection and discharge of the condensate through the collection port, recovery channel, and guide structure reduces the retention of condensate in the desulfurization flue gas flow path, thereby achieving synergistic treatment of desulfurization flue gas heating and condensate recovery.

[0017] Secondly, the desulfurization method for heating and desulfurizing desulfurized flue gas provided in this application improves the heat exchange sufficiency during the desulfurization flue gas heating process by supplying liquid to the steam generation space to form steam, allowing the steam to enter the desulfurization flue gas flow path through the steam release component and exchange heat with the desulfurization flue gas; by allowing the steam after heat exchange to form condensate on the heat exchange condensation surface, and using the condensate to adsorb residual sulfur-containing components and / or particulate matter in the desulfurization flue gas, residual pollutants can be treated while heating the desulfurization flue gas; by allowing the condensate to enter the recovery channel through the liquid collection port and be guided to the liquid outlet by the flow guiding structure, centralized recovery of condensate containing residual sulfur-containing components and / or particulate matter can be achieved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the desulfurization flue gas heating and desulfurization structure provided in the embodiments of this application; Figure 2This is a schematic flowchart of the desulfurization flue gas heating and desulfurization method provided in the embodiments of this application.

[0020] In the diagram, 1 is the heating tube; 2 is the partition plate; 3 is the recovery channel; 4 is the inclined bottom surface; 5 is the liquid collection port; 6 is the side slope; 7 is the steam generation space; 8 is the heating element; 9 is the steam release port; and 10 is the heating fin. Detailed Implementation

[0021] After desulfurization, the flue gas may still require further heating based on emission, transportation, or subsequent process requirements. Conventional heating structures often rely on indirect heat exchange between the surface of heating tubes, heat exchange tubes, and the flue gas. This relatively simple heat exchange contact method can easily affect the heating efficiency and uniformity of the desulfurized flue gas. Furthermore, the desulfurized flue gas may contain residual sulfur-containing components and particulate matter. Simple heating structures typically only provide temperature increases and cannot adequately address the treatment of these residual components.

[0022] Based on the above background, this application provides a desulfurization flue gas heating and desulfurization structure and method. By forming a steam generation space 7 and a recovery channel 3 separated from each other in the heating tube 1, the liquid is made into steam in the steam generation space 7 and enters the desulfurization flue gas flow path through the steam release component. After the steam exchanges heat with the desulfurization flue gas and the heat exchange condensation surface, condensate is formed. The condensate enters the recovery channel 3 through the liquid collection port 5 and is guided to the liquid outlet by the flow guiding structure. This improves the contact mode between the desulfurization flue gas and the heating medium and provides a structural basis for the residual sulfur-containing components and particulate matter to be carried out with the condensate.

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application.

[0024] Example 1 like Figure 1 As shown, this embodiment provides a desulfurization flue gas heating and desulfurization structure, including a heating tube 1, a steam generation component, a steam release component, a condensation heat exchange component, and a condensate recovery component.

[0025] The heating tube 1 is disposed in the desulfurization flue gas flow path. In this embodiment, the desulfurization flue gas flow path can be understood as the space located outside the heating tube 1 and through which the desulfurization flue gas flows. When the heating tube 1 is disposed in the desulfurization flue gas flow path, the desulfurization flue gas can flow along the outside of the heating tube 1, steam can enter the desulfurization flue gas flow path outside the heating tube 1 from inside the heating tube 1, and the condensation heat exchange component can also come into contact with the steam and desulfurization flue gas in the desulfurization flue gas flow path.

[0026] The heating tube 1 serves as the supporting foundation for the desulfurization flue gas heating and desulfurization structure, simultaneously supporting the structure required for steam generation, steam release, heat exchange and condensation, and condensate recovery. The heating tube 1 contains a separate steam generation space 7 and a recovery channel 3. The steam generation space 7 accommodates the liquid entering the heating tube 1 and provides space for the liquid to be heated and form steam; the recovery channel 3 receives and transports the condensate formed after heat exchange. The separation of the steam generation space 7 and the recovery channel 3 allows the steam generation process and the condensate recovery process to proceed separately within the same heating tube 1, preventing condensate from flowing back into the steam generation space 7 and affecting the steam generation process, and also ensuring that the steam flow path and the condensate flow path are independent.

[0027] A steam generating assembly is installed within the steam generating space 7. After the liquid enters the steam generating space 7, the steam generating assembly causes the liquid to form steam. Therefore, the desulfurization flue gas heating and desulfurization structure can not only exchange heat with the desulfurization flue gas through the pipe wall of the heating pipe 1, but also provide steam to the desulfurization flue gas flow path, allowing the steam to participate in the heating process of the desulfurization flue gas as a heating medium. Compared to relying solely on indirect heat exchange through the pipe wall, the introduction of steam into the desulfurization flue gas flow path increases the contact between the heating medium and the desulfurization flue gas, which is beneficial for improving the adequacy of the desulfurization flue gas heating process.

[0028] A steam release assembly is installed on the wall of the heating tube 1, and the steam generation space 7 is connected to the desulfurization flue gas flow path through the steam release assembly. Steam generated within the steam generation space 7 can pass through the wall of the heating tube 1 via the steam release assembly and enter the desulfurization flue gas flow path outside the heating tube 1. The steam release assembly creates a passage for steam to flow out between the steam generation space 7 and the desulfurization flue gas flow path, allowing steam to enter the flue gas flow area outside the heating tube 1 from within the heating tube 1. After entering the desulfurization flue gas flow path, the steam exchanges heat with the desulfurization flue gas, thereby raising the temperature of the desulfurization flue gas.

[0029] A condensing heat exchange component is located outside the heating tube 1. The condensing heat exchange component includes a heat exchange condensing surface, which is situated within the desulfurization flue gas flow path. After steam enters the desulfurization flue gas flow path, it can exchange heat with the desulfurization flue gas and the heat exchange condensing surface. The steam temperature decreases after heat exchange, and condensate forms on the heat exchange condensing surface. The location of the heat exchange condensing surface within the desulfurization flue gas flow path ensures that the condensate forms close to the desulfurization flue gas flow area. During formation and flow, the condensate can contact residual sulfur-containing components and particulate matter in the desulfurization flue gas, providing conditions for these components to be carried away with the condensate.

[0030] The condensate recovery assembly includes a collection port 5 and a flow guiding structure. The collection port 5 is located on the wall of the heating pipe 1 and communicates with the recovery channel 3. The collection port 5 is spaced apart from the vapor release assembly and faces the heat exchange condensation surface. Condensate formed on the heat exchange condensation surface can collect at the collection port 5 and enter the recovery channel 3 through it. The recovery channel 3 has an outlet end, and the flow guiding structure is located within the recovery channel 3, directing the condensate collected at the collection port 5 to the outlet end. Through the cooperation of the collection port 5, the recovery channel 3, and the flow guiding structure, condensate containing residual sulfur components and / or particulate matter can be guided to the discharge location, reducing the retention of condensate in the desulfurization flue gas flow path. Therefore, the desulfurization flue gas heating and desulfurization structure can collect and discharge condensate while heating the desulfurization flue gas, creating a continuous coordination between the heating process, the condensation process, and the residual component removal process.

[0031] Example 2 The desulfurization flue gas heating and desulfurization structure provided in this embodiment further explains the spatial division, steam formation, steam release, heat exchange condensation and condensate recovery structure within the heating tube 1, based on Embodiment 1.

[0032] like Figure 1 As shown, a partition 2 is installed inside the cavity of the heating tube 1, separating the steam generation space 7 and the recovery channel 3 from each other. In the illustrated embodiment, the recovery channel 3 is located above the steam generation space 7, and the partition 2 is located between the recovery channel 3 and the steam generation space 7. The partition 2 can extend along the length of the heating tube 1 and connect to the inner wall of the heating tube 1, so that the steam generation space 7 and the recovery channel 3 form independent spaces within the heating tube 1. The steam generation space 7 is used for liquid entry and steam formation, while the recovery channel 3 is used for condensate entry and discharge. After being separated from each other by the partition 2, the mutual interference between the liquid and steam in the steam generation space 7 and the condensate in the recovery channel 3 can be reduced.

[0033] The steam generating assembly is a heating element 8 disposed within the steam generating space 7. The heating element 8 heats the liquid entering the steam generating space 7, causing the liquid to form steam. In some embodiments, the liquid can be water, and the steam can be water vapor. The heating element 8 is disposed within the steam generating space 7 so that the heat generated by the heating element 8 can directly act on the liquid in the steam generating space 7, which is beneficial for steam formation inside the heating tube 1. The heating element 8 can be fixedly disposed within the steam generating space 7, or it can extend along the length of the steam generating space 7 to increase the heating range between the heating element 8 and the liquid.

[0034] In some embodiments, the steam generation space 7 can be connected to an external liquid supply structure, which supplies liquid to the steam generation space 7. The steam generation space 7 can also be used in conjunction with an external liquid replenishment, liquid drainage, or liquid level control structure to maintain the liquid supply within the steam generation space 7 according to actual operating requirements. The aforementioned external liquid supply, liquid replenishment, liquid drainage, or liquid level control structure can be determined based on the actual layout of the boiler flue gas treatment system and does not constitute a limitation on the desulfurization flue gas heating and desulfurization structure itself.

[0035] The steam release component is a steam release port 9 that penetrates the wall of the heating pipe 1. The steam release port 9 is formed in the pipe wall region of the heating pipe 1 corresponding to the steam generation space 7. The inner end of the steam release port 9 is connected to the steam generation space 7, and the outer end of the steam release port 9 is connected to the desulfurization flue gas flow path. Thus, the steam generated in the steam generation space 7 can pass through the pipe wall of the heating pipe 1 through the steam release port 9 and enter the desulfurization flue gas flow path outside the heating pipe 1. The steam release port 9 is formed in the pipe wall region corresponding to the steam generation space 7, so that there is a shorter connection path between the steam generation space 7 and the desulfurization flue gas flow path outside the heating pipe 1.

[0036] In some embodiments, there may be one steam release port 9 or multiple ports spaced apart along the length of the heating tube 1. When there are multiple steam release ports 9, the steam can be dispersed along the length of the heating tube 1 into the desulfurization flue gas flow path, which helps to reduce the local heat exchange concentration caused by single-point steam release and improve the uniformity of heating of the desulfurization flue gas around the heating tube 1.

[0037] The condensation heat exchange component consists of heating fins 10 disposed on the outside of the heating tube 1, with a heat exchange and condensation surface formed on the surface of the heating fins 10. The heating fins 10 are connected to the outside of the heating tube 1, increasing the contact area between the outside of the heating tube 1 and the desulfurized flue gas and steam. In some embodiments, the heating fins 10 can be integrally formed with the heating tube 1, or fixedly connected to the outer wall of the heating tube 1. After steam enters the desulfurized flue gas flow path through the steam release component, it can exchange heat with the surface of the heating fins 10, forming condensate on the surface of the heating fins 10. The heating fins 10 can both participate in the heating of the desulfurized flue gas as a heat exchange structure and serve as a surface for condensate formation and adhesion, making it easier for the condensate after steam heat exchange to form and collect in a predetermined area.

[0038] In some embodiments, the heating fins 10 can be arranged along the length of the heating tube 1, or they can be arranged in a local area outside the heating tube 1 according to the flow direction of the desulfurization flue gas and the heat exchange requirements. When the heating fins 10 are located in the flow path of the desulfurization flue gas, the desulfurization flue gas can flow over the surface of the heating fins 10, and the steam can also contact and exchange heat with the desulfurization flue gas and the heating fins 10 in the area where the heating fins 10 are located.

[0039] In some embodiments, the steam release direction of the steam release assembly is towards the area where the heating fin 10 is located. After being released by the steam release assembly, the steam can flow towards the area where the heating fin 10 is located and come into contact with the heat exchange and condensation surface of the heating fin 10. This arrangement can reduce the deviation of the released steam from the condensation and heat exchange area, making the heat exchange and condensation process of the steam occur more concentrated near the heating fin 10, thereby facilitating the collection of condensate towards the area where the collection port 5 is located. In some embodiments, the steam release port 9 can be located on the side of the heating pipe 1 near the heating fin 10, making it easier for the steam released from the steam release port 9 to enter the heat exchange area where the heating fin 10 is located.

[0040] The liquid collection port 5 is located on the pipe wall of the heating pipe 1 on the side corresponding to the recovery channel 3, and is positioned above the vapor release assembly in the height direction of the heating pipe 1. The outer end of the liquid collection port 5 faces the area where the heat exchange condensation surface is located, and the inner end of the liquid collection port 5 is connected to the recovery channel 3. The condensate formed on the heat exchange condensation surface can collect at the liquid collection port 5 on the outside of the heating pipe 1 and enter the recovery channel 3 through the liquid collection port 5. The liquid collection port 5 is located above the vapor release assembly, which creates a height separation between the vapor release position and the condensate recovery position, which helps to reduce the possibility of condensate falling directly back to the vapor release assembly and distinguishes the condensate recovery path from the vapor release path.

[0041] In some embodiments, there may be one collection port 5 or multiple ports arranged along the length of the heating pipe 1, so as to disperse and collect the condensate according to the range of condensate formation. When multiple collection ports 5 are arranged along the length of the heating pipe 1, the condensate can enter the recovery channel 3 at multiple locations, reducing the risk of condensate stagnation when flowing a long distance along the outside of the heating pipe 1.

[0042] The recovery channel 3 has an outlet end, which can be formed at one or both ends of the recovery channel 3 and is used to connect with an external collection structure. A flow guiding structure is installed within the recovery channel 3, directing the condensate entering the recovery channel 3 through the collection port 5 to the outlet end. When the flow guiding structure is an inclined bottom surface 4, the inclined bottom surface 4 is formed within the recovery channel 3 and gradually decreases in elevation from the area where the collection port 5 is located towards the outlet end. After entering the recovery channel 3 through the collection port 5, the condensate can flow along the inclined bottom surface 4 towards the outlet end. The inclined bottom surface 4 uses the height difference to guide the condensate, making it less likely for the condensate entering the recovery channel 3 to stagnate within the channel, thereby facilitating the centralized collection of condensate containing residual sulfur components and / or particulate matter.

[0043] In some embodiments, the inclined bottom surface 4 can extend continuously along the length of the recovery channel 3, or a locally inclined area can be formed according to the position of the liquid outlet end, as long as the condensate entering the recovery channel 3 can be guided to the liquid outlet end. The condensate discharged from the liquid outlet end can enter an external collection structure for subsequent centralized treatment.

[0044] In some embodiments, a side slope 6 is formed on the outer side of the heating tube 1. The side slope 6 is located around the liquid collection port 5 and slopes towards the liquid collection port 5. The condensate generated on the outer side of the heating tube 1 can flow to the liquid collection port 5 under the guidance of the side slope 6. After the side slope 6 and the liquid collection port 5 are combined, the collection effect of the condensate on the outer side of the heating tube 1 can be improved, making it easier for the condensate to enter the recovery channel 3 and reducing the residue of condensate on the outer side of the heating tube 1 or in the desulfurization flue gas flow path. The side slope 6 can be formed on the heating tube 1 near the liquid collection port 5, or it can be partially arranged around the liquid collection port 5, so as to guide the condensate around the liquid collection port 5 into the liquid collection port 5.

[0045] Example 3 This embodiment describes the working process of the desulfurization flue gas heating and desulfurization structure provided in the above embodiment.

[0046] like Figure 1 and Figure 2 As shown, when using a desulfurization flue gas heating and desulfurization structure, the heating pipe 1 can be placed in the desulfurization flue gas flow path, so that the desulfurization flue gas flows past the outside of the heating pipe 1 before being discharged. In some embodiments, the heating pipe 1 can be connected to an external liquid supply device and an external control system. The external liquid supply device supplies liquid into the steam generation space 7, and the external control system controls the operation of the steam generation components. The aforementioned external liquid supply device and external control system can be set according to the actual equipment layout and do not constitute a limitation on the desulfurization flue gas heating and desulfurization structure itself.

[0047] After the liquid enters the steam generating space 7, the steam generating assembly heats the liquid, causing it to form steam within the steam generating space 7. In embodiments where the liquid is water, the steam generating assembly can heat the water to form steam. The steam in the steam generating space 7 enters the desulfurization flue gas flow path via the steam release assembly, where it exchanges heat with the desulfurization flue gas, thus heating the flue gas. Compared to a method that relies solely on the outer wall of the heating pipe 1 for heat exchange, the introduction of steam into the desulfurization flue gas flow path increases the contact between the heating medium and the desulfurization flue gas, resulting in a more thorough heating process for the desulfurization flue gas.

[0048] Steam exchanges heat with the desulfurized flue gas and the condenser heat exchange components, and the steam forms condensate on the heat exchange surface of the condenser heat exchange components. During the formation and flow of the condensate, it can adsorb or carry away residual sulfur-containing components and / or particulate matter from the desulfurized flue gas. In some embodiments, the residual sulfur-containing components may include sulfur dioxide and / or sulfur trioxide, and the particulate matter may include dust entrained in the desulfurized flue gas. Thus, the desulfurization structure for heating and removing sulfur from the desulfurized flue gas can simultaneously heat the desulfurized flue gas and carry away residual sulfur-containing components and particulate matter through the condensate.

[0049] After condensate forms on the outside of heating tube 1, it can flow along the surface of heating fin 10, the outer surface of heating tube 1, or the side slope 6 to the collection port 5, and then enter the recovery channel 3 through the collection port 5. The condensate entering the recovery channel 3 flows towards the outlet end under the guidance of the flow guiding structure. The condensate discharged through the outlet end can be collected by an external collection structure for subsequent centralized treatment. The above process can continuously complete liquid supply, steam formation, steam release, desulfurization flue gas heat exchange, condensate formation, condensate adsorption of residual components, and condensate flow guidance and recovery, allowing the desulfurization flue gas heating process and the residual sulfur-containing component and particulate matter treatment processes to be carried out in the same structure.

[0050] This application also provides a method for heating and desulfurizing desulfurized flue gas, which is implemented using the desulfurization flue gas heating and desulfurization structure described in any of the above embodiments. The method includes: supplying liquid into a steam generation space 7 and heating the liquid to form steam through a steam generation component; releasing the steam into the desulfurization flue gas flow path through a steam release component, where the steam exchanges heat with the desulfurization flue gas; the steam after heat exchange forming condensate on the heat exchange and condensation surface of a condensation heat exchange component, where the condensate adsorbs residual sulfur-containing components and / or particulate matter in the desulfurization flue gas; the condensate entering a recovery channel 3 through a collection port 5; and guiding the condensate entering the recovery channel 3 to an outlet end through a flow guiding structure.

[0051] During continuous operation, liquid can be continuously or intermittently supplied to the steam generation space 7, and the steam generation components can continuously or intermittently generate steam according to the heating requirements of the desulfurization flue gas. After the steam enters the desulfurization flue gas flow path through the steam release components, it exchanges heat with the desulfurization flue gas and the condensation heat exchange components to form condensate; the condensate enters the recovery channel 3 through the liquid collection port 5, and is then guided to the liquid outlet by the guide structure. Through the above method, the processes of liquid supply, steam generation, steam release, heat exchange, condensation, liquid collection and liquid discharge can be carried out continuously until the desulfurization operation of heating and desulfurizing the desulfurization flue gas is completed.

[0052] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0054] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0055] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0056] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0057] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A desulfurization flue gas heating and desulfurization structure, characterized in that, include: A heating tube (1) is installed in the desulfurization flue gas flow path. The heating tube (1) has a steam generation space (7) and a recovery channel (3) separated from each other. A steam generating assembly is disposed within the steam generating space (7), the steam generating assembly being used to generate steam from liquid entering the steam generating space (7); A steam release assembly is disposed on the wall of the heating tube (1), and the steam generation space (7) is connected to the desulfurization flue gas flow path through the steam release assembly; A condensing heat exchange component is disposed outside the heating tube (1). The condensing heat exchange component includes a heat exchange condensing surface, which is located in the desulfurization flue gas flow path. The condensate recovery assembly includes a collection port (5) and a flow guiding structure. The collection port (5) is located on the wall of the heating tube (1) and communicates with the recovery channel (3). The collection port (5) is spaced apart from the vapor release assembly and faces the heat exchange condensation surface. The recovery channel (3) has an outlet end. The flow guiding structure is located in the recovery channel (3) and guides the condensate collected at the collection port (5) to the outlet end.

2. The desulfurization flue gas heating and desulfurization structure according to claim 1, characterized in that, A partition (2) is provided inside the cavity of the heating tube (1), which separates the steam generation space (7) and the recovery channel (3) from each other.

3. The desulfurization flue gas heating and desulfurization structure according to claim 1, characterized in that, The steam generating component is a heating element (8) disposed within the steam generating space (7).

4. The desulfurization flue gas heating and desulfurization structure according to claim 1, characterized in that, The steam release component is a steam release port (9) that penetrates the wall of the heating pipe (1). The steam release port (9) is formed in the pipe wall region of the heating pipe (1) corresponding to the steam generation space (7).

5. The desulfurization flue gas heating and desulfurization structure according to claim 1, characterized in that, The condensation heat exchange component is a heating fin (10) disposed on the outside of the heating tube (1), and the heat exchange condensation surface is formed on the surface of the heating fin (10).

6. The desulfurization flue gas heating and desulfurization structure according to claim 5, characterized in that, The vapor release direction of the vapor release component is toward the area where the heating fin (10) is located.

7. The desulfurization flue gas heating and desulfurization structure according to claim 1, characterized in that, The liquid collection port (5) is located on the pipe wall of the heating pipe (1) on the side corresponding to the recovery channel (3), and the liquid collection port (5) is located above the vapor release assembly in the height direction of the heating pipe (1).

8. The desulfurization flue gas heating and desulfurization structure according to claim 7, characterized in that, The flow guiding structure is an inclined bottom surface (4), which is formed in the recovery channel (3) and gradually decreases from the area where the liquid collection port (5) is located to the liquid outlet end.

9. The desulfurization flue gas heating and desulfurization structure according to claim 7, characterized in that, The heating tube (1) has a side slope (6) formed on its outer side. The side slope (6) is located around the liquid collection port (5) and is inclined toward the liquid collection port (5).

10. A method for heating and desulfurizing flue gas, characterized in that, Based on the desulfurization flue gas heating and desulfurization structure as described in any one of claims 1 to 9, the desulfurization flue gas heating and desulfurization method includes: Liquid is supplied into the steam generating space (7), and the liquid is heated to form steam through the steam generating assembly; The steam is released into the desulfurization flue gas flow path through the steam release component, and the steam exchanges heat with the desulfurization flue gas; After heat exchange, the steam forms condensate on the heat exchange and condensation surface of the condensation heat exchange component, and the condensate adsorbs residual sulfur-containing components and / or particulate matter in the desulfurization flue gas. The condensate enters the recovery channel (3) through the collection port (5); The condensate entering the recovery channel (3) is directed to the outlet end through the flow guiding structure.

Images