Gas flow dredging type coal-fired power plant low-temperature economizer flue anti-accumulation system

Abstract

The utility model is suitable for flue ash deposition prevention technical field provides a kind of airflow dredging formula coal-fired power plant low-temperature coal economizer flue ash deposition prevention system, including the exhaust pipe for discharging coal-fired flue gas;Detachable installation on the exhaust pipe is used to connect the connecting pipe for expanding the coverage of the exhaust pipe;Setting on the connecting pipe is used to assist the observation window for showing the flue ash deposition state;Fixed on the connecting pipe is used to connect the connecting tube and the connecting pipe of the exhaust pipe;Install on the exhaust pipe and can be contacted with the connecting pipe is used to increase the sealing ring of the sealing property.The airflow dredging formula coal-fired power plant low-temperature coal economizer flue ash deposition prevention system provided in the scheme is convenient to split and clean to prevent the influence of ash deposition in pipeline on heat exchange efficiency, and can preliminarily filter flue gas to reduce the required cleaning frequency.

Description

Technical Field

[0001] This utility model belongs to the field of flue dust prevention technology, and in particular relates to an airflow-guided flue dust prevention system for low-temperature economizers in coal-fired power plants. Background Technology

[0002] As one of the core equipment for energy conservation and carbon reduction in domestic coal-fired power plants, the low-temperature economizer plays an important role in the treatment of flue gas at the tail end of coal-fired power plants. However, due to unreasonable flue design, some coal-fired power plants have ash accumulation in the flue of the low-temperature economizer, which affects the heat exchange effect of the low-temperature economizer. The ash accumulation not only reduces the heat exchange efficiency, but may also cause equipment failure and affect the safe and stable operation of the power plant. Therefore, it is necessary to clean the flue regularly. The existing flue has a high degree of integrity, which makes it inconvenient to clean the inside regularly to prevent ash accumulation. Utility Model Content

[0003] This invention provides an airflow-guided flue gas duct anti-ash accumulation system for low-temperature economizers in coal-fired power plants, aiming to solve the problem mentioned in the background art that the existing flue gas ducts have high integrity and are inconvenient to clean regularly to prevent ash accumulation.

[0004] To solve the above problems, this utility model is implemented as follows: an airflow-guided flue gas ash prevention system for low-temperature economizers in coal-fired power plants, comprising: an exhaust pipe for discharging coal-fired flue gas; a connecting pipe detachably installed on the exhaust pipe for connecting and expanding the coverage area of ​​the exhaust pipe; an observation window provided on the connecting pipe for assisting in displaying the ash accumulation status of the flue gas; a connecting cylinder fixed on the connecting pipe for connecting the connecting pipe and the exhaust pipe; a sealing ring installed on the exhaust pipe and in contact with the connecting pipe for increasing sealing performance; a limiting component provided on the connecting cylinder for stabilizing the connecting cylinder; and a filter structure provided on the exhaust pipe for preliminary filtration of dust particles.

[0005] Preferably, an extension plate is installed on the exhaust pipe, and a retaining plate is provided on the connecting cylinder. The extension plate can extend into the retaining plate to connect the connecting pipe and the exhaust pipe.

[0006] Preferably, the limiting component includes a cylinder fixed to the connecting cylinder, a spring installed inside the cylinder, and a locking block installed on the spring and extending to the bottom of the locking plate. The extension plate is provided with a locking slot, and the locking block can extend into the locking slot.

[0007] Preferably, the filtration structure includes a filter box that is detachably mounted on the exhaust pipe, an air inlet pipe is installed on the side of the filter box away from the exhaust pipe, and a filter screen for preliminary filtration of smoke and dust is provided inside the filter box.

[0008] Preferably, a servo motor is installed on the filter box, a rotating shaft is rotatably installed inside the filter box, a cleaning rod that can contact the filter screen for cleaning the filter screen is installed on the rotating shaft, and the output shaft of the servo motor is connected to the rotating shaft.

[0009] Preferably, the cleaning rod is provided with a brush strip, the servo motor is covered with a protective shell for protecting the servo motor, and a protective door is provided on one side of the filter box for sealing the filter box.

[0010] Preferably, the spring is provided with a limiting telescopic rod for limiting the extension and retraction direction of the spring, the locking block is equipped with a pull rope that extends through the limiting telescopic rod to the outside of the cylinder, and the extension plate is rotatably equipped with a hook for hanging and stabilizing the pull rope.

[0011] Compared with related technologies, the airflow-guided flue gas ash prevention system for low-temperature economizers in coal-fired power plants provided by this utility model has the following beneficial effects: Compared with existing technologies, the airflow-guided low-temperature economizer flue dust prevention system for coal-fired power plants provided by this solution reduces maintenance costs and improves the safety and stability of the equipment through its detachable and easy-to-clean structural design. In particular, the application of the filter structure and automatic cleaning device further enhances the filtration effect and cleaning efficiency of the system, providing a strong guarantee for the safe and stable operation of coal-fired power plants. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of a low-temperature economizer flue dust prevention system for coal-fired power plants with airflow guidance provided by this utility model. Figure 2 This is a schematic diagram of the main sectional view of the exhaust pipe and connecting pipe in this utility model; Figure 3 for Figure 1 An enlarged structural diagram of part A shown in the figure; Figure 4 This is a bottom sectional view of the limiting component in this utility model; Figure 5 This is a schematic diagram of the main cross-sectional view of the filter structure in this utility model.

[0013] Reference numerals: 1. Exhaust pipe; 2. Connecting pipe; 3. Observation window; 4. Connecting cylinder; 5. Sealing ring; 6. Clamping plate; 7. Extension plate; 8. Cylinder body; 9. Spring; 10. Clamping block; 11. Limiting telescopic rod; 12. Pull rope; 13. Hook; 14. Filter box; 15. Intake pipe; 16. Filter screen; 17. Rotating shaft; 18. Cleaning rod; 19. Servo motor; 20. Protective shell. Detailed Implementation

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order; the terms "inner," "outer," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 of the present invention.

[0015] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0016] This utility model embodiment provides an airflow-guided flue gas ash prevention system for low-temperature economizers in coal-fired power plants, such as... Figure 1-5 As shown, the airflow-guided low-temperature economizer flue gas ash prevention system for coal-fired power plants includes: an exhaust pipe 1 for discharging coal-fired flue gas; a connecting pipe 2 detachably installed on the exhaust pipe 1 for connecting and expanding the coverage area of ​​the exhaust pipe 1; an observation window 3 provided on the connecting pipe 2 for assisting in displaying the flue gas ash accumulation status; a connecting cylinder 4 fixed on the connecting pipe 2 for connecting the connecting pipe 2 and the exhaust pipe 1; a sealing ring 5 installed on the exhaust pipe 1 and in contact with the connecting pipe 2 for increasing sealing performance; a limiting component provided on the connecting cylinder 4 for stabilizing the connecting cylinder 4; and a filter structure provided on the exhaust pipe 1 for preliminary filtration of dust particles.

[0017] In this embodiment, exhaust pipe 1 serves as the main channel for discharging coal-fired flue gas, ensuring the smooth discharge of flue gas generated by the coal-fired power plant. Connecting pipe 2 connects to and expands the coverage area of ​​exhaust pipe 1, helping to better distribute and guide the flow of flue gas. By increasing the length and coverage of the flue, it helps to reduce ash accumulation. The detachable design facilitates cleaning and maintenance. Observation window 3 assists in displaying the ash accumulation status of the flue, allowing staff to visually observe the internal condition of the flue, improving the convenience of ash accumulation detection, and enabling timely detection and handling of ash accumulation problems to avoid affecting heat exchange efficiency and equipment safety. Connecting cylinder 4 serves as a transition structure between connecting pipe 2 and exhaust pipe 1, ensuring a stable connection between the two. The connection enhances the structural stability and prevents leakage or malfunction due to loose connections. The sealing ring 5 increases the sealing between the connecting pipe 2 and the exhaust pipe 1, preventing flue gas leakage, improving the system's sealing performance, ensuring that flue gas does not leak out, and also helping to reduce ash accumulation. The limiting component stabilizes the connecting cylinder 4, preventing it from shifting or loosening during operation, enhancing the system's stability, and ensuring that the connecting cylinder 4 can maintain the correct position and posture for a long time. The filter structure initially filters dust particles, reducing the amount of dust entering the flue. By reducing the entry of dust particles, it helps to reduce the ash accumulation rate, extend the flue cleaning cycle, and also helps to protect downstream equipment from dust corrosion.

[0018] In a further preferred embodiment of the present invention, an extension plate 7 is installed on the exhaust pipe 1, and a retaining plate 6 is provided on the connecting cylinder 4. The extension plate 7 can extend into the retaining plate 6 to connect the connecting pipe 2 and the exhaust pipe 1.

[0019] In this embodiment, the extension plate 7 serves as an extension of the exhaust pipe 1 and is used to cooperate with the retaining plate 6 on the connecting cylinder 4 to achieve a stable connection between the connecting pipe 2 and the exhaust pipe 1. The cooperation between the extension plate 7 and the retaining plate 6 further enhances the stability of the connection between the connecting pipe 2 and the exhaust pipe 1, effectively preventing leakage or loosening caused by poor connection. At the same time, this design is also easy to install and disassemble, providing convenience for subsequent cleaning and maintenance. The cooperation between the retaining plate 6 and the extension plate 7 also facilitates disassembly, making it convenient to clean and maintain the inside of the flue.

[0020] In a further preferred embodiment of the present invention, the limiting component includes a cylinder 8 fixed on the connecting cylinder 4, a spring 9 installed inside the cylinder 8, and a locking block 10 installed on the spring 9 and extending to the bottom of the locking plate 6. The extension plate 7 is provided with a locking slot, and the locking block 10 can extend into the locking slot.

[0021] In this embodiment, the cylinder 8, as part of the limiting component, provides installation space for the spring 9 and the locking block 10. The fixed installation of the cylinder 8 ensures the stability and reliability of the limiting component and provides a basis for the normal operation of the spring 9 and the locking block 10. The spring 9 provides elastic force to the locking block 10, enabling it to automatically engage or disengage from the locking slot. The elastic force of the spring 9 allows the locking block 10 to be tightly engaged in the locking slot on the extension plate 7, thereby enhancing the connection stability between the connecting cylinder 4 and the exhaust pipe 1. At the same time, the elasticity of the spring 9 also allows the locking block 10 to be easily disengaged when needed, facilitating disassembly and cleaning. The design of the locking block 10 makes the connection between the connecting cylinder 4 and the exhaust pipe 1 more secure and reliable, effectively preventing loosening or detachment caused by vibration or external force. In addition, the cooperation between the locking block 10 and the locking slot also facilitates disassembly and reconnection, providing convenience for subsequent cleaning and maintenance work.

[0022] In a further preferred embodiment of the present invention, the filtration structure includes a filter box 14 detachably installed on the exhaust pipe 1, an air inlet pipe 15 is installed on the side of the filter box 14 away from the exhaust pipe 1, and a filter screen 16 for preliminary filtration of smoke and dust is provided inside the filter box 14.

[0023] In this embodiment, the filter box 14 serves as the main part of the filtration structure, used to install the filter screen 16 and initially filter smoke particles. The detachable design of the filter box 14 makes cleaning and replacing the filter screen 16 more convenient, effectively extending the service life of the filter screen 16 and reducing maintenance costs. In addition, the filter box 14 also protects the filter screen 16 from damage by the external environment. The design of the air inlet pipe 15 allows smoke particles to smoothly enter the filter box 14 and undergo initial filtration by the filter screen 16. This design helps reduce the erosion of downstream equipment by smoke particles and improves the stability and reliability of the entire system. The filtration effect of the filter screen 16 effectively reduces the entry of smoke particles, reduces the risk of ash accumulation in the flue, and thus improves heat exchange efficiency. At the same time, the replaceability of the filter screen 16 allows it to maintain its filtration effect for a long time, providing a strong guarantee for the safe and stable operation of the coal-fired power plant.

[0024] In a further preferred embodiment of the present invention, a servo motor 19 is installed on the filter box 14, a rotating shaft 17 is rotatably installed inside the filter box 14, a cleaning rod 18 is installed on the rotating shaft 17 that can contact the filter screen 16 for cleaning the filter screen 16, and the output shaft of the servo motor 19 is connected to the rotating shaft 17.

[0025] In this embodiment, the servo motor 19 serves as the drive source, providing power for the rotation of the cleaning rod 18. The precise control characteristics of the servo motor 19 enable the cleaning rod 18 to contact and clean the filter screen 16 at an appropriate speed and force, effectively removing dust particles attached to the filter screen 16. This design not only improves cleaning efficiency but also avoids damage to the filter screen 16 due to over-cleaning. The rotating shaft 17 serves as the mounting and rotation platform for the cleaning rod 18, transmitting the rotational power of the servo motor 19 to the cleaning rod 18. The rotational design of the rotating shaft 17 allows the cleaning rod 18 to contact the filter screen 16 evenly and comprehensively, ensuring that the dust particles on the filter screen 16 are thoroughly removed. At the same time, the stability of the rotating shaft 17 also ensures the smooth progress of the cleaning process. The design of the cleaning rod 18 makes cleaning the filter screen 16 simpler and more efficient. Driven by the servo motor 19, the cleaning rod 18 can automatically and continuously contact and clean the filter screen 16, greatly reducing the difficulty and cost of manual cleaning. In addition, the material and shape of the cleaning rod 18 have been carefully selected to ensure that it will not damage the filter screen 16.

[0026] In a further preferred embodiment of the present invention, the cleaning rod 18 is provided with a brush strip, the servo motor 19 is covered with a protective shell 20 for protecting the servo motor 19, and a protective door for sealing the filter box 14 is provided on one side.

[0027] In this embodiment, the brush strip is used to directly contact and clean the filter screen 16, removing dust particles and stains attached to the filter screen 16, enhancing the cleaning ability of the cleaning rod 18, and making the cleaning of the filter screen 16 more thorough. The softness and wear resistance of the brush strip also ensure that it will not damage the filter screen 16 during the cleaning process, extending the service life of the filter screen 16. The design of the protective shell 20 enables the servo motor 19 to operate stably in harsh working environments, reducing the motor failure rate caused by environmental factors. At the same time, the protective shell 20 also plays a role in sound insulation and shock absorption, improving the stability and reliability of the entire system. The design of the protective door effectively protects the cleanliness and tidiness of the inside of the filter box 14, providing convenience for cleaning and replacing the filter screen 16.

[0028] In a further preferred embodiment of the present invention, the spring 9 is provided with a limiting telescopic rod 11 for limiting the extension and retraction direction of the spring 9, the locking block 10 is provided with a pull rope 12 extending through the limiting telescopic rod 11 to the outside of the cylinder 8, and the extension plate 7 is rotatably provided with a hook 13 for hanging and stabilizing the pull rope 12.

[0029] In this embodiment, the limiting telescopic rod 11 is used to limit the extension and retraction direction of the spring 9, ensuring that the spring 9 can extend and retract in a predetermined direction when subjected to force. The design of the limiting telescopic rod 11 effectively prevents the spring 9 from twisting or shifting during the force process, ensuring the stability and reliability of the spring 9. At the same time, the limiting telescopic rod 11 also plays a supporting and guiding role, allowing the locking block 10 to smoothly engage or disengage from the locking slot under the push of the spring 9. The design of the pull rope 12 allows the user to easily control the extension and retraction of the locking block 10 by pulling the pull rope 12, thereby realizing the quick disassembly and connection of the connecting cylinder 4 and the exhaust pipe 1. This design not only improves the convenience of operation, but also reduces the difficulty and risk in the disassembly and connection process. The design of the hook 13 ensures that the pull rope 12 remains stable during operation, avoiding operational errors and safety hazards caused by shaking or falling off. At the same time, the rotatable installation of the hook 13 also allows it to flexibly adapt to the hanging requirements of the pull rope 12 at different angles.

[0030] In summary, compared with related technologies, this device reduces maintenance costs and improves equipment safety and stability through its detachable and easy-to-clean structural design. In particular, the application of the filter structure and automatic cleaning device further enhances the system's filtration effect and cleaning efficiency, providing a strong guarantee for the safe and stable operation of coal-fired power plants.

[0031] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. An airflow-guided flue gas ash prevention system for low-temperature economizers in coal-fired power plants, characterized in that, include: Exhaust pipes used for emitting coal-fired flue gas; A connecting pipe that can be detachably installed on the exhaust pipe for connecting to expand the coverage area of ​​the exhaust pipe; An observation window is provided on the connecting pipe to assist in displaying the status of ash accumulation in the flue. A connecting cylinder fixed to the connecting pipe for connecting the connecting pipe and the exhaust pipe; A sealing ring installed on the exhaust pipe and in contact with the connecting pipe to increase sealing performance; A limiting component is provided on the connecting cylinder to stabilize the connecting cylinder; A filter structure is provided on the exhaust pipe for preliminary filtration of smoke particles.

2. The airflow-guided low-temperature economizer flue gas ash prevention system for coal-fired power plants as described in claim 1, characterized in that, An extension plate is installed on the exhaust pipe, and a retaining plate is provided on the connecting cylinder. The extension plate can extend into the retaining plate to connect the connecting pipe and the exhaust pipe.

3. The airflow-guided low-temperature economizer flue gas ash prevention system for coal-fired power plants as described in claim 2, characterized in that, The limiting component includes a cylinder fixed to the connecting cylinder, a spring installed inside the cylinder, and a locking block installed on the spring and extending to the bottom of the locking plate. The extension plate is provided with a locking slot, and the locking block can extend into the locking slot.

4. The airflow-guided low-temperature economizer flue gas ash prevention system for coal-fired power plants as described in claim 1, characterized in that, The filtration structure includes a filter box that can be detachably installed on the exhaust pipe, an air inlet pipe being installed on the side of the filter box away from the exhaust pipe, and a filter screen for preliminary filtration of smoke and dust being provided inside the filter box.

5. The airflow-guided flue gas ash prevention system for low-temperature economizers in coal-fired power plants as described in claim 4, characterized in that, A servo motor is installed on the filter box, and a rotating shaft is rotatably installed inside the filter box. A cleaning rod that can contact the filter screen for cleaning the filter screen is installed on the rotating shaft, and the output shaft of the servo motor is connected to the rotating shaft.

6. The airflow-guided low-temperature economizer flue gas ash prevention system for coal-fired power plants as described in claim 5, characterized in that, The cleaning rod is equipped with a brush strip, the servo motor is covered with a protective shell to protect the servo motor, and a protective door is provided on one side of the filter box to close the filter box.

7. The airflow-guided low-temperature economizer flue gas ash prevention system for coal-fired power plants as described in claim 3, characterized in that, The spring is provided with a limiting telescopic rod for limiting the extension and retraction direction of the spring. A pull rope is installed on the locking block, extending through the limiting telescopic rod to the outside of the cylinder. A hook for hanging and stabilizing the pull rope is rotatably installed on the extension plate.

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