Soot blowing device with special-shaped nozzle for combustor

Abstract

The invention provides a soot blowing device used for a combustor and provided with a special-shaped nozzle, the soot blowing device used for the combustor and provided with the special-shaped nozzle comprises a soot blowing power component, a soot blowing pipeline and a soot blowing nozzle assembly, and the soot blowing power component is used for providing a gas source needed by the soot blowing device; the first end of the soot blowing pipeline is connected with an outlet of the soot blowing power component, the second end of the soot blowing pipeline is used for being arranged in the combustor, the soot blowing nozzle assembly comprises a control component, a connecting pipe and a nozzle component, the first end of the connecting pipe is connected with the second end of the soot blowing pipeline, and the nozzle component is connected with the second end of the connecting pipe. The nozzle component comprises a first nozzle and a second nozzle, an included angle is formed between the extension directions of the first nozzle and the second nozzle, at least part of the control component is arranged in the connecting pipe, and the control component is used for controlling connection and disconnection between the first nozzle or the second nozzle and the connecting pipe. The soot blower provided with the special-shaped nozzle and used for the combustor is convenient to transform and good in soot cleaning effect.

Description

Technical Field

[0001] This invention belongs to the technical field of fluidized bed pulverized coal burners, specifically, it relates to a soot blowing device with an irregularly shaped nozzle for a burner. Background Technology

[0002] The double-cone reverse-injection recirculation burner is a typical burner structure that enhances pulverized coal ignition and stable combustion through a "reverse injection-recirculation" coupling method. The fuel gas flow is guided by the front cone structure, forming a reverse jet near the recirculation cap. This jet, combined with the swirling secondary air, creates a stable high-temperature recirculation zone at the junction of the front and rear cones. This recirculation zone continuously carries the heat generated by combustion back to the ignition zone, thus achieving rapid heating and self-stabilized combustion of the pulverized coal—a core advantage that distinguishes it from conventional jet burners.

[0003] In related technologies, due to the backflow and reflux effects, some high-temperature pulverized coal particles have a longer residence time in the front cone region, and the local wall temperature is often at a high level. When using coal types with low ash melting points or strong slagging tendency, ash accumulation, coking, and even local slagging are very likely to occur in the reflux zone and burner wall. In particular, the direct scouring of the front cone wall by high-temperature reflux will accelerate the adhesion and sintering of ash, which not only affects the flow field stability of the burner, but may also lead to a series of problems such as reflux obstruction, insufficient ignition heat, and deterioration of the flame morphology at the burner outlet. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention provide a soot blowing device with an irregularly shaped nozzle for a burner, which is easy to modify and has a good soot removal effect.

[0006] The soot blowing device with irregularly shaped nozzle for a burner according to an embodiment of the present invention includes: A soot blowing power component, which provides the air source required by the soot blowing device; The soot blowing pipe has a first end connected to the outlet of the soot blowing power unit and a second end for placement inside the burner. A soot blowing nozzle assembly includes a control component, a connecting pipe, and a nozzle component. A first end of the connecting pipe is connected to a second end of the soot blowing pipeline, and the nozzle component is connected to the second end of the connecting pipe. The nozzle component includes a first nozzle and a second nozzle, and the extension directions of the first nozzle and the second nozzle form an angle. At least a portion of the control component is disposed within the connecting pipe, and the control component is used to control the connection and disconnection between the first nozzle or the second nozzle and the connecting pipe.

[0007] The soot blowing device with irregularly shaped nozzles for burners in this embodiment of the invention features a design that allows the soot blowing airflow to be injected at a more efficient angle and speed, thereby more effectively removing accumulated ash and coke. The direction and intensity of the soot blowing airflow can be flexibly adjusted via control components to adapt to the soot blowing needs of different locations.

[0008] Furthermore, the improved soot blowing efficiency may reduce the required soot blowing gas volume, thereby lowering energy consumption. Regularly removing accumulated ash and coke can also reduce wear on the burner walls, extending the burner's lifespan. Thus, removing ash and coke reduces burner resistance, improves combustion efficiency, optimizes flame morphology, and enhances combustion performance.

[0009] In some embodiments, the first nozzle extends toward the inner peripheral wall of the burner, the second nozzle extends toward the centerline of the burner, and the angle between the extension direction of the first nozzle and the extension direction of the second nozzle is greater than or equal to 20° and less than or equal to 40°.

[0010] In some embodiments, the first nozzle has a first flow channel, the cross-sectional area of ​​which gradually decreases in the direction from the connecting pipe toward the first nozzle in a plane orthogonal to the axial direction of the connecting pipe.

[0011] In some embodiments, the cross-sectional profile of the first flow channel is arc-shaped, and the first flow channel protrudes toward the inner peripheral wall of the burner.

[0012] In some embodiments, the soot blowing nozzle assembly further includes a guide plate disposed within the first nozzle. The guide plate is used to divide the first flow channel into multiple guide channels. In a plane orthogonal to the axial direction of the connecting pipe, the cross-sectional area of ​​the guide channels gradually decreases or remains constant along the direction from the connecting pipe toward the first nozzle.

[0013] In some embodiments, the second nozzle has a second flow channel, the cross-sectional area of ​​which gradually decreases in the direction from the connecting pipe toward the second nozzle in a plane orthogonal to the axial direction of the connecting pipe.

[0014] In some embodiments, the cross-sectional profile of the second flow channel is arc-shaped, and the second flow channel is recessed toward the central axis of the burner.

[0015] In some embodiments, the control component includes a control element connected to the connecting pipe, and the control element is movable or rotatable relative to the connecting pipe. The soot blowing nozzle assembly has a conducting state, a first blocking state, and a second blocking state. In the conducting state, the extension direction of the control element is parallel to the extension direction of the connecting pipe; In the first blocking state, the control element moves or rotates toward the first nozzle to block the first nozzle; In the second blocking state, the control element moves or rotates toward the second nozzle to block the second nozzle.

[0016] In some embodiments, the control component further includes a connector, a first end of which is connected to the control component, and a second end of which penetrates the sidewall of the burner. The connector is used to drive the control component to move or rotate.

[0017] In some embodiments, the cross-sectional area of ​​the control element gradually decreases or remains constant along the direction from the nozzle component to the connecting pipe. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the soot blowing device with irregularly shaped nozzles for a burner according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the soot blowing device with irregularly shaped nozzles for a burner according to another embodiment of the present invention.

[0020] Figure 3 This is a partial structural schematic diagram of the soot blowing nozzle assembly of a soot blowing device with an irregularly shaped nozzle for a burner, according to an embodiment of the present invention.

[0021] Figure 4 yes Figure 3 A partial cross-sectional view of the structure shown.

[0022] Figure 5 This is an installation diagram of the control component of a soot blowing device with an irregularly shaped nozzle for a burner, according to an embodiment of the present invention.

[0023] Figure 6 This is an installation diagram of the control component of a soot blowing device with an irregularly shaped nozzle for a burner, according to another embodiment of the present invention.

[0024] Figure 7 This is an installation diagram of the control component of a soot blowing device with an irregularly shaped nozzle for a burner, according to another embodiment of the present invention.

[0025] Figure label: 100. Burner; 200. Return cap; 300. Soot blowing device; 400. Purge airflow. 2. Soot blowing pipeline, 31. Control component; 311. Control element; 312. Connector; 32. Connecting pipe; 33. Nozzle assembly; 331. First nozzle; 3311. First flow channel; 332. Second nozzle; 3321. Second flow channel; 34. Guide plate. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] like Figures 1-7 As shown, the soot blowing device with irregularly shaped nozzle for a burner according to an embodiment of the present invention includes: a soot blowing power component, a soot blowing pipeline 2, and a soot blowing nozzle assembly.

[0028] The soot blowing power unit provides the air source required by the soot blowing device 300. The first end of the soot blowing pipe 2 is connected to the outlet of the soot blowing power unit, and the second end of the soot blowing pipe 2 is placed inside the burner 100. The soot blowing nozzle assembly includes a control unit 31, a connecting pipe 32, and a nozzle component 33. The first end of the connecting pipe 32 is connected to the second end of the soot blowing pipe 2, and the nozzle component 33 is connected to the second end of the connecting pipe 32. The nozzle component 33 includes a first nozzle 331 and a second nozzle 332, with an included angle between the extending directions of the first nozzle 331 and the second nozzle 332. At least a portion of the control unit 31 is disposed within the connecting pipe 32, and the control unit 31 controls the connection and disconnection of the first nozzle 331 or the second nozzle 332 with the connecting pipe 32.

[0029] Specifically, such as Figure 1 , Figure 3 and Figure 4 As shown, the soot blowing power unit is typically an air source, such as an air compressor or air tank. The outlet of the soot blowing power unit is connected to the soot blowing pipeline 2 via a pipe. The soot blowing power unit is used to provide the power required for soot blowing (such as generating a high-pressure pulsed airflow) to ensure that the soot blowing gas can be effectively ejected from the soot blowing nozzle assembly.

[0030] The first end of the soot blowing pipe 2 is connected to the outlet of the soot blowing power unit, and the second end extends into the burner 100, placed directly at the location where soot blowing is required. The soot blowing pipe 2 serves as an airflow delivery channel, used to deliver the air source generated by the soot blowing power unit into the burner 100, ensuring that the soot blowing gas can reach the specific area where ash or coke has accumulated.

[0031] The first end of the connecting pipe 32 is connected to the second end of the soot blowing pipe 2, and the second end is connected to the nozzle assembly 33. The nozzle assembly 33 includes two nozzles (a first nozzle 331 and a second nozzle 332) with an included angle between them. The control component 31 is at least partially disposed within the connecting pipe 32. The nozzle assembly is designed to allow the soot blowing gas to be sprayed at a specific angle and direction, which can more effectively break up and remove accumulated ash or coke.

[0032] The control component 31 is located inside the connecting pipe 32 and is used to control the connection between the first nozzle 331 or the second nozzle 332 and the connecting pipe 32. The control component 31 can independently control the opening or closing of each nozzle, thereby achieving precise control of the direction and intensity of the soot blowing airflow and improving soot blowing efficiency.

[0033] Understandably, the control unit 31 can be used to control the on / off state of the first nozzle 331 and the second nozzle 332 separately. For example, the first nozzle 331 can work independently; or the second nozzle 332 can also work independently; or the first nozzle 331 and the second nozzle 332 can work simultaneously. That is, different soot blowing structures can be adopted according to the different operating states of the burner 100 to achieve the best soot cleaning effect.

[0034] In other words, the shaped nozzle design of the soot blowing device for burners in this embodiment of the invention allows the soot blowing airflow to be injected at a more effective angle and speed, thereby more effectively removing accumulated ash and coke. The direction and intensity of the soot blowing airflow can be flexibly adjusted by the control component 31 to adapt to the soot blowing needs of different locations.

[0035] Furthermore, the improved soot blowing efficiency may reduce the required soot blowing gas volume, thereby lowering energy consumption. Regularly removing accumulated ash and coke can also reduce wear on the burner 100 walls, extending its service life. Thus, removing accumulated ash and coke can reduce burner 100 resistance, improve combustion efficiency, optimize flame morphology, and enhance combustion performance.

[0036] Of course, multiple soot blowing devices 300 can be arranged inside the burner 100, such as... Figure 2 As shown, depending on the degree of ash accumulation inside the burner 100, a soot blowing device 300 can be installed at the corresponding location to simultaneously remove ash from different locations. This allows the purging airflow 400 to "scan" and cover the inner wall of the burner 100 within a certain range, expanding the originally limited local point-like purging effect into a relatively continuous planar ash cleaning area along the circumference and height, significantly reducing ash cleaning dead zones and long-term hard-to-reach ash accumulation areas from an engineering perspective.

[0037] In some embodiments, the first nozzle 331 extends toward the inner peripheral wall of the burner 100, and the second nozzle 332 extends toward the centerline of the burner 100. The angle between the extension direction of the first nozzle 331 and the extension direction of the second nozzle 332 is greater than or equal to 20° and less than or equal to 40°.

[0038] It is understandable that, such as Figure 1 , Figure 3 and Figure 4 As shown, the first nozzle 331 extends toward the inner peripheral wall of the burner 100 to clean the inner wall of the burner 100, and the second nozzle 332 extends toward the center line of the burner 100, that is, mainly to clean the ash accumulation near the return cap 200.

[0039] The angle between the extending directions of the first nozzle 331 and the second nozzle 332 is greater than or equal to 20° and less than or equal to 40°. This angle range provides a moderate angle that ensures that the two nozzles cover different areas of the inner wall and centerline of the burner 100, without causing airflow dispersion due to an excessively large angle, thus affecting the soot blowing effect.

[0040] In other words, the two nozzles target the inner peripheral wall and the return cap 200 respectively for soot blowing, enabling more comprehensive coverage of the burner 100 interior, reducing blind spots, and improving the overall soot blowing coverage. The angle design between the first nozzle 331 and the second nozzle 332 ensures that the airflow forms effective cross-flow and coverage inside the burner 100, which helps to improve soot blowing efficiency. Preferably, the angle between the first nozzle 331 and the second nozzle 332 is between 20° and 40°, which provides sufficient airflow intensity to remove ash deposits without causing mutual airflow interference, thereby maintaining the flow field stability inside the burner 100. Thus, by effectively removing ash deposits and coking, the resistance of the burner 100 can be reduced, the combustion conditions of pulverized coal can be improved, and the combustion efficiency can be increased.

[0041] It should be noted that, depending on the operating state of the burner 100, such as during low load and ignition phases (when the recirculation zone is sensitive to disturbances), the second nozzle 332 operating mode or the simultaneous operation of the first nozzle 331 and second nozzle 332 at low flow rates is used for light ash removal to avoid disturbing the flame root. During normal medium-to-high load operation (when there is more ash accumulation on the walls), the first nozzle 331 operating mode is used primarily to improve the wall ash removal effect. When the recirculation cap 200 has heavy ash accumulation or the flame root is offset, the second nozzle operating mode is temporarily switched for short-term enhanced purging. Alternatively, before maintenance or in scenarios with heavy ash accumulation, the first nozzle 331 and second nozzle 332 operating modes are executed sequentially once each, finally returning to the simultaneous operation mode of the first nozzle 331 and second nozzle 332 to restore the flow field inside the burner 100.

[0042] In some embodiments, the first nozzle 331 has a first flow channel 3311, and the cross-sectional area of ​​the first flow channel 3311 gradually decreases along the direction from the connecting pipe 32 toward the first nozzle 331 in a plane orthogonal to the axial direction of the connecting pipe 32.

[0043] Specifically, such as Figure 1 , Figure 3 and Figure 4 As shown, the first flow channel 3311 is located inside and extends through the first nozzle 331, and the cross-sectional area of ​​the first flow channel 3311 gradually decreases from left to right. This gradual decrease in cross-sectional area means that the airflow velocity within the flow channel increases as the channel lengthens. This helps generate a higher airflow velocity at the nozzle outlet, which is crucial for effectively removing accumulated dust and coking.

[0044] Understandably, the reduced cross-sectional area leads to increased airflow acceleration, which helps concentrate the airflow near the nozzle outlet, thereby increasing the direct impact of the airflow on ash and coking. The high-velocity and concentrated airflow can more effectively break down and remove ash and coking within the burner 100, especially in the localized area at the nozzle outlet, helping to prevent slagging. Furthermore, because the airflow accelerates within the flow channel, the likelihood of airflow diffusion is reduced once it exits the nozzle, helping to maintain the directionality and concentration of the sootblowing airflow, thus improving the sootblowing effect.

[0045] In some embodiments, the cross-sectional profile of the first flow channel 3311 is arc-shaped, and the first flow channel 3311 protrudes toward the inner peripheral wall of the burner 100.

[0046] It is understandable that, such as Figure 1 , Figure 3 and Figure 4 As shown, the first flow channel 3311 of the first nozzle 331 adopts a flat rectangular or arc-shaped cross-section, and the injection direction is aligned with the inner wall surface of the burner 100, thereby forming a wide high-momentum airflow band along the wall surface. Compared with the conventional circular nozzle, the arc-shaped first flow channel 3311 of this embodiment significantly expands the effective coverage area in the circumferential direction of the burner 100, and can more concentratedly act on the easily ash-accumulating positions such as the junction of the front cone and the rear cone, improving the ability to peel off and carry away ash and slag from the wall surface.

[0047] In some embodiments, the soot blowing nozzle assembly further includes a guide plate 34 disposed within the first nozzle 331. The guide plate 34 is used to divide the first flow channel 3311 into a plurality of guide channels. In a plane orthogonal to the axial direction of the connecting pipe 32, the cross-sectional area of ​​the guide channels gradually decreases or remains constant along the direction from the connecting pipe 32 toward the first nozzle 331.

[0048] Specifically, such as Figure 1 , Figure 3and Figure 4 As shown, the function of the guide plate 34 is to divide the first flow channel 3311 into multiple flow channels. Optionally, there are multiple guide plates 34, which are arranged at intervals along the width of the first nozzle 331.

[0049] Understandably, if the dimensions of the flow path in each guide channel remain constant, the flow path of the airflow within the nozzle can be precisely controlled, resulting in a more uniform distribution of airflow within each channel. If the dimensions of the flow path in each guide channel gradually decrease, the airflow velocity within the channel increases, thereby enhancing the airflow's impact on ash accumulation and coking.

[0050] In other words, the design of the flow guide channel ensures that the airflow has a high velocity and concentrated impact force at the nozzle outlet, which is very effective for removing ash and coking inside the burner 100. Of course, the design of the flow guide channel can be adjusted according to the thickness and location of the ash accumulation by changing the shape of the guide plate 34 and the number of flow guide channels to adapt to different soot blowing requirements.

[0051] In other words, by arranging the guide plate 34 inside the first nozzle 331, the jet can be designed as a "circumferentially dispersed type" or a "conforming swirl type" as needed. This can not only expand the circumferential cleaning width, but also match the original swirl direction as much as possible, reducing additional disturbance to the original flow field, thereby obtaining a higher unit air volume cleaning efficiency under the same air source conditions.

[0052] It should be noted that during soot blowing, the main momentum is concentrated in the first nozzle 331 near the wall, while the blowing intensity in the central area is precisely controlled by the second nozzle 332. This avoids the direct injection of high-momentum airflow into the recirculation zone by traditional direct-flow circular nozzles, which would cause instantaneous damage to the swirling intensity and recirculation structure. Therefore, during soot blowing, the recirculation field, swirling center position, and flame pattern inside the burner 100 can remain relatively stable, which is beneficial to the combustion stability and load regulation performance during long-term operation.

[0053] In some embodiments, the second nozzle 332 has a second flow channel 3321, and the cross-sectional area of ​​the second flow channel 3321 gradually decreases in the direction from the connecting pipe 32 toward the second nozzle 332 in a plane orthogonal to the axial direction of the connecting pipe 32.

[0054] Specifically, such as Figure 1 , Figure 3 and Figure 4 As shown, the second flow channel 3321 is located inside and extends through the second nozzle 332. Similar to the first nozzle 331, the cross-sectional area of ​​the second flow channel 3321 gradually decreases along the direction from the connecting pipe 32 toward the second nozzle 332.

[0055] Understandably, the gradual reduction in cross-sectional area leads to an increase in airflow velocity in the second channel 3321, which gives the airflow ejected from the second nozzle 332 higher kinetic energy, thereby enhancing the soot blowing effect. The high-velocity airflow helps concentrate the soot blowing action on specific areas, such as the return cap 200, effectively removing accumulated ash and coking in the central area.

[0056] In some embodiments, the cross-sectional profile of the second flow channel 3321 is arc-shaped, and the second flow channel 3321 is recessed toward the central axis of the burner 100.

[0057] It is understandable that by setting a second nozzle 332 pointing towards the center of the return cap 200 of the burner 100, and designing its cross-section as an irregularly shaped small nozzle that fits the shape of the return cap 200, a fine, high-speed, directional airflow pulse is formed, which passes through the return zone and acts directly on the surface of the return cap 200.

[0058] In other words, compared with the traditional structure of blowing along the wall, this directional airflow can more effectively flush away and remove ash and coke deposits on the return cap 200, reducing problems such as obstructed return flow and insufficient ignition heat caused by long-term ash accumulation in the return cap 200 area. Since the flow rate of the second nozzle 332 is relatively controlled, it has less disturbance to the main return structure and the flame root, thus enhancing the ash removal capability of the central area while maintaining combustion stability.

[0059] Therefore, by enhancing the cleaning effect of the return cap 200 and key wall areas, it helps maintain a more uniform and controllable temperature field distribution inside the burner 100, reducing the risk of coking and slagging caused by localized high-temperature ash accumulation. The reduction in ash accumulation and slagging not only helps maintain the designed flow field and flame pattern, but also mitigates thermal shock and localized overheating of high-temperature components, thereby extending the service life of key components of the burner 100, reducing maintenance frequency, and improving the overall safety and reliability of the unit.

[0060] In some embodiments, the control component 31 includes a control element 311 connected to the connecting pipe 32, and the control element 311 is movable or rotatable relative to the connecting pipe 32. The soot blowing nozzle assembly has a conducting state, a first blocking state, and a second blocking state. In the conducting state, the extension direction of the control element 311 is parallel to the extension direction of the connecting pipe 32. In the first blocking state, the control element 311 moves or rotates toward the first nozzle 331 to block the first nozzle 331. In the second blocking state, the control element 311 moves or rotates toward the second nozzle 332 to block the second nozzle 332.

[0061] Understandably, in the open state, the extension direction of the control element 311 is parallel to the extension direction of the connecting pipe 32. At this time, the control element 311 does not obstruct the airflow to the first nozzle 331 and the second nozzle 332; that is, the soot blowing nozzles are in a fully open state, allowing airflow through both nozzles. In the first blocked state, the control element 311 moves or rotates towards the first nozzle 331 to block it. In this state, the first nozzle 331 cannot eject airflow, enabling the second nozzle 332 to partially blow soot or shut down the first nozzle 331. In the second blocked state, the control element 311 moves or rotates towards the second nozzle 332 to block it. Similarly, in this state, the second nozzle 332 cannot eject airflow, enabling the first nozzle 331 to partially blow soot or shut down the second nozzle 332.

[0062] In other words, the movement or rotation of the control component 311 provides multi-state control of the sootblowing nozzle, which can be flexibly adjusted according to different sootblowing needs. That is, by blocking one or two nozzles, localized sootblowing can be achieved, cleaning specific areas and improving sootblowing efficiency.

[0063] Furthermore, when maintenance or safety checks are required, a single nozzle can be shut down individually to avoid unnecessary airflow interference and ensure operational safety. Maintenance can be easily performed by moving or rotating the control element 311 without affecting other parts of the soot blowing device. When soot blowing is not required, the corresponding nozzle can be shut down via the control element 311 to avoid unnecessary airflow and thus save energy.

[0064] Therefore, by optimizing the nozzle shape, injection direction, and flow distribution, the soot blowing device 300 of the present invention enables the purging airflow 400 to act more concentratedly on the ash concentration area (the wall surface at the junction of the return cap 200 and the front and rear cones), reducing ineffective airflow penetration in the return zone and energy dissipation in non-critical areas. Under the same air source pressure and volume conditions, a higher soot cleaning effect per unit volume of air can be achieved. In engineering applications, this improvement in energy utilization efficiency provides conditions for reducing the duration required for a single purging cycle and optimizing the soot blowing frequency and cycle, thereby helping to reduce the overall energy consumption of the soot blowing system and improve the long-term economic efficiency of the burner 100.

[0065] In some embodiments, the control component 31 further includes a connector 312, the first end of which is connected to the control component 311, and the second end of which penetrates the side wall of the burner 100. The connector 312 is used to drive the control component 311 to move or rotate.

[0066] Understandably, the first end of the connector 312 is connected to the control component 311, typically via a thread, snap-fit, or other mechanical connection. The second end of the connector 312 penetrates the side wall of the burner 100. The side wall of the burner 100 can be fitted with a mounting hole that matches the connector 312. For example, if the control component 311 operates by rotation, a bearing can be installed in the mounting hole of the burner 100 to mate with the connector 312, allowing the connector 312 to drive the control component 311 to rotate. Similarly, if the control component 311 operates by movement, the mounting hole of the burner 100 is a slotted hole to ensure that the connector 312 can move along the extension direction of the mounting hole, thereby driving the control component 311 to move.

[0067] In other words, by controlling the control component 311 externally, the risk of the control component 311 being directly exposed to high-temperature or corrosive environments can be reduced, thereby improving the reliability and service life of the control component 311. External control allows the sootblowing nozzle assembly to be adjusted according to actual needs, such as changing the sootblowing intensity and range at different times or under different conditions. In addition, since the operation of the control component 31 can be performed externally, this simplifies the maintenance of the sootblowing nozzle assembly, and operators do not need to enter the burner 100 to control and adjust it.

[0068] Therefore, the soot blowing device 300 of the present invention only improves the structure and arrangement of the nozzle at the front end of the nozzle, which is achieved by replacing or adding a non-standard nozzle module, and usually does not require large-scale modification of the burner 100 body structure. At the same time, the soot blowing system can continue to use the original air source and control system, and can be used for engineering applications with only the nozzle and a few control components 31 adapted. The modification cost is low, the installation and commissioning are simple, and it has good engineering promotion value.

[0069] In some embodiments, the cross-sectional area of ​​the control element 311 gradually decreases or remains constant in the direction from the nozzle component 33 to the connecting pipe 32.

[0070] Understandably, when airflow flows from the larger cross-sectional area connecting pipe 32 into the gradually decreasing cross-sectional area control element 311, the airflow velocity increases. According to fluid dynamics principles, the increase in velocity reduces airflow separation and vortex generation because airflow tends to maintain continuous flow to minimize energy loss. Alternatively, if the cross-sectional area of ​​the control element 311 remains constant, the airflow velocity will not change significantly due to the change in cross-sectional area, thus airflow separation and vortex generation will also be relatively less.

[0071] Optionally, such as Figure 6 and Figure 7 As shown, the control element 311 can be a hemispherical or conical structure; or, as... Figure 5The control component 311 can be a plate-like structure.

[0072] Therefore, the soot blowing device with irregularly shaped nozzles for burners in this embodiment of the invention enhances the directional soot cleaning capability of the return cap area; improves the purging coverage and soot cleaning efficiency of the inner wall area of ​​the burner; reduces the disturbance of the purging process to the flow field and flame stability of the main combustion zone; expands the overall soot cleaning coverage and reduces soot cleaning dead zones; improves the energy utilization efficiency of purging, which is conducive to reducing the overall operating energy consumption; slows down slagging and uneven heating, and improves the reliability of equipment operation; and has good adaptability to modification and engineering implementation.

[0073] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sootblowing device with a profiled nozzle for a burner, characterized in that The application relates to a soot blowing device, which comprises: a soot blowing power component for providing a gas source required by the soot blowing device; a soot blowing pipeline, a first end of which is connected with an outlet of the soot blowing power component, and a second end of which is arranged in a burner; a soot blowing nozzle assembly, which comprises a control component, a connecting pipe and a nozzle component, a first end of the connecting pipe is connected with the second end of the soot blowing pipeline, the nozzle component is connected with a second end of the connecting pipe, the nozzle component comprises a first nozzle and a second nozzle, an angle between extension directions of the first nozzle and the second nozzle is provided, at least part of the control component is arranged in the connecting pipe, and the control component is used for controlling on-off of the first nozzle or the second nozzle and the connecting pipe.

2. The sootblowing device with a profiled nozzle for a burner according to claim 1, characterized in that The first nozzle extends towards an inner circumferential wall of the burner, the second nozzle extends towards a center line of the burner, and the angle between the extension direction of the first nozzle and the extension direction of the second nozzle is greater than or equal to 20 DEG and less than or equal to 40 DEG.

3. The sootblowing device with a profiled nozzle for a burner according to claim 1, characterized in that The first nozzle has a first flow channel, in a plane perpendicular to an axial direction of the connecting pipe, a cross-sectional area of the first flow channel gradually decreases along a direction from the connecting pipe to the first nozzle.

4. The sootblowing device with a profiled nozzle for a burner according to claim 3, characterized in that A cross-sectional profile of the first flow channel is arc-shaped, and the first flow channel protrudes towards the inner circumferential wall of the burner.

5. The sootblowing device with a profiled nozzle for a burner according to claim 4, characterized in that The soot blowing nozzle assembly further comprises a flow guide plate arranged in the first nozzle, the flow guide plate is used for separating the first flow channel into a plurality of flow guide channels, in the plane perpendicular to the axial direction of the connecting pipe, the cross-sectional area of the flow guide channels gradually decreases or remains unchanged along the direction from the connecting pipe to the first nozzle.

6. The sootblowing device with a profiled nozzle for a burner according to claim 1, characterized in that The second nozzle has a second flow channel, in the plane perpendicular to the axial direction of the connecting pipe, the cross-sectional area of the second flow channel gradually decreases along the direction from the connecting pipe to the second nozzle.

7. The sootblowing device with a profiled nozzle for a burner according to claim 6, characterized in that A cross-sectional profile of the second flow channel is arc-shaped, and the second flow channel is recessed towards the center line of the burner.

8. The sootblowing device with a profiled nozzle for a burner according to claim 1, characterized in that The control component comprises a control member connected with the connecting pipe and movable or rotatable relative to the connecting pipe, the soot blowing nozzle assembly has a conducting state, a first blocking state and a second blocking state, in the conducting state, the extension direction of the control member is parallel to the extension direction of the connecting pipe; in the first blocking state, the control member is moved or rotated towards the first nozzle for blocking the first nozzle; in the second blocking state, the control member is moved or rotated towards the second nozzle for blocking the second nozzle.

9. The sootblowing device with a profiled nozzle for a burner according to claim 8, characterized in that The control component further comprises a connecting member, a first end of the connecting member is connected with the control member, a second end of the connecting member penetrates through a side wall of the burner, and the connecting member is used for driving the control member to move or rotate.

10. The sootblowing device with a profiled nozzle for a burner according to claim 8, characterized in that In a direction from the nozzle component to the connecting pipe, the cross-sectional area of the control member gradually decreases or remains unchanged.

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