A shock wave soot blowing device for raising the temperature of main steam

Abstract

The utility model discloses a shock wave soot blowing equipment of promoting main steam temperature, including the spray pipe of being located on the inner wall of boiler, the end of spray pipe is equipped with the conical outlet, the inside of spray pipe is equipped with the lumen, the outside of conical outlet is equipped with the sealing plate for the plugging conical outlet, the inside of lumen is equipped with the spray head that can axial movement to the conical outlet and open the sealing plate, the one end of spray head is equipped with the nozzle to the conical outlet, another end of spray head communicates with the lumen. The utility model has can avoid the spray head is accumulated ash and is blocked, can clean up the accumulated ash fast and efficiently, reduces the cleaning difficulty, and then delays the accumulated ash and agglomerate of high low area, guarantees the convection heat exchange efficiency of high low area, makes circulating fluidized bed boiler main steam temperature keep in target temperature range etc.

Description

Technical Field

[0001] This utility model relates to a shock wave soot blowing device for increasing the temperature of main steam, and belongs to the technical field. Background Technology

[0002] In combined heat and power (CHP) processes, ash accumulation in the high and low flow zones can severely hinder the convective heat transfer efficiency of the high and low flow zones in the tail flue of a circulating fluidized bed boiler. Delaying ash agglomeration in the high and low flow zones is the main way to increase the main steam temperature. Therefore, in practical scenarios, it is usually necessary to install shock wave soot blowing equipment to remove the ash accumulation in order to increase the main steam temperature.

[0003] Shockwave soot blowing equipment uses compressed air as the medium and employs pressure relief and explosive release technology to instantly generate a rapid airflow shock wave to remove boiler ash. The equipment consists of a shockwave soot blower connected to nozzles via pipes. These nozzles are aimed at the cleaning area of ​​the boiler. When the shockwave soot blower is operating, the airflow passes sequentially through the pipes and nozzles, being ejected towards the ash accumulation. After a cleaning cycle, the boiler requires a considerable period before ash reforms, necessitating another cleaning. During this period, the shockwave soot blowing equipment is not operating, and the nozzles do not eject airflow. However, the combustion of fuel in the boiler continuously produces fly ash. Especially in boilers that also handle waste, the fuel contains some waste, resulting in complex fly ash compositions. This fly ash can easily clog the nozzles, requiring regular cleaning and impacting boiler efficiency. Since the shockwave soot blowing device is located inside the boiler, cleaning it is also quite troublesome. Utility Model Content

[0004] The purpose of this invention is to provide a shock wave soot blowing device that increases the temperature of the main steam, solving the problems of easy clogging of nozzles and difficulty in cleaning existing technologies.

[0005] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: a shock wave soot blowing device for increasing the temperature of main steam, including a nozzle provided on the inner wall of a boiler, a conical outlet at the end of the nozzle, a cavity inside the nozzle, a sealing plate for sealing the conical outlet on the outside of the conical outlet, a nozzle that can move axially to the outside of the conical outlet and push open the sealing plate inside the cavity, a nozzle at one end of the nozzle facing the conical outlet, and the other end of the nozzle communicating with the cavity.

[0006] As a further preferred technical solution of this utility model, the nozzle is provided with a cone that fits with the inner wall of the cavity, and the inner wall of the cone outlet is provided with an annular limiting seat that fits with the outer wall of the cone and the outer wall of the nozzle. One end of the cone is connected to the nozzle, and the other end of the cone is open and connected to the cavity.

[0007] As a further preferred technical solution of this utility model, the inner wall of the cone is provided with an annular inclined plate that is arranged in the opposite direction to the direction of the nozzle and inclined towards the center, and an opening is formed between the cone and the annular inclined plate.

[0008] As a further preferred technical solution of this utility model, a plurality of telescopic springs are provided between the outer wall of the cone and the inner wall of the annular limiting seat, and the inner wall of the annular limiting seat is provided with a receiving groove for accommodating the telescopic springs.

[0009] As a further preferred technical solution of this utility model; the end of the cone is provided with an annular positioning part that cooperates with the inner wall of the cavity, the outer side of the annular positioning part is provided with an annular protrusion, the inner wall of the cavity is provided with a groove that cooperates with the annular protrusion, the groove is provided with a plurality of balls that abut against the annular protrusion, both sides of the annular protrusion are provided with baffles for closing the groove, and the inner wall of the cavity is provided with a movable groove for the baffles to move.

[0010] As a further preferred technical solution of this utility model, the upper side of the sealing plate and the outer end face of the conical outlet are rotatably connected by a rotating shaft, and a torsion spring is provided at the connection between the upper side of the sealing plate and the outer end face of the conical outlet.

[0011] Therefore, this utility model has the advantages of avoiding nozzle blockage by ash accumulation, quickly and efficiently cleaning ash accumulation, reducing cleaning difficulty, delaying ash agglomeration in the high and low flow areas, ensuring the convective heat transfer efficiency of the high and low flow areas, and keeping the main steam temperature of the circulating fluidized bed boiler within the target temperature range. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 yes Figure 1 Enlarged view of the structure at point A in the diagram;

[0014] Figure 3 yes Figure 1 Enlarged view of the structure at point B in the diagram. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0016] like Figure 1 and 3As shown, a shock wave soot blowing device for increasing the main steam temperature includes a nozzle 1 installed on the inner wall of a boiler. The nozzle 1 extends from the outside of the boiler to the inside, and can perform shock wave soot blowing. A conical outlet 11 is provided at the end of the nozzle 1. A cavity 12 is provided inside the nozzle 1. Compressed air from the outside is discharged through the cavity 12 to the outside of the conical outlet 11 to perform shock wave soot blowing on the inside of the boiler. A sealing plate 2 is provided outside the conical outlet 11 to seal it. During normal boiler operation, the sealing plate 2 seals the conical outlet 11 to prevent soot generated during normal boiler operation from clogging the nozzle 1. A nozzle 3 is provided inside the cavity 12, which can move axially to the outside of the conical outlet 11 and push open the sealing plate 2. The nozzle 3 is located inside the cavity 12 and can move axially to achieve telescopic movement within the cavity 12. The nozzle 3 faces the conical outlet 11. The nozzle 31 is provided at one end, and the other end of the nozzle 3 is connected to the tube 12. The nozzle 31 moves with the nozzle 3. When the boiler is working normally, the sealing plate 2 closes the nozzle 1, and the nozzle 3 is located in the tube 12. The sealing plate 2 forms a seal on the conical opening 11 of the nozzle 1 and the nozzle 31 of the nozzle 3 to prevent soot from entering the tube 12 and causing blockage. Before the boiler starts working, the nozzle 3 moves outward toward the conical outlet 11. The nozzle 31 pushes the sealing plate 2 to open the conical outlet 11 until the nozzle 31 is located outside the conical outlet 11, so that ash removal can be performed inside the boiler. At the same time, the sealing plate 2 is pushed open to avoid blocking the nozzle 31, ensuring the normal ash removal of the nozzle 3, thereby delaying the ash accumulation and agglomeration in the high and low flow areas, ensuring the convective heat transfer efficiency of the high and low flow areas, and keeping the main steam temperature of the circulating fluidized bed boiler above 450℃.

[0017] like Figure 1As shown, the nozzle 3 is provided with a cone 32 that fits into the inner wall of the cavity 12. The cone 32 is integrally formed with the nozzle 3. One end of the cone 32 is connected to the nozzle 31, and the other end of the cone 32 is open and connected to the cavity 12. The inner side of the cone 32 and the inner side of the nozzle 3 are connected to the cavity 12, so that compressed air can be directly delivered to the outside of the nozzle pipe 1 through the nozzle. The nozzle 3 and the cone 32 maintain communication with the cavity 12 during movement. The inner wall of the cone 32 is provided with a direction opposite to that of the nozzle 3 and facing... An annular inclined plate 321 is inclined in the middle, and a cavity 322 is formed between the cone 32 and the annular inclined plate 321. The annular inclined plate 321 and the inner wall of the cone 32 enclose the cavity 322, so that when compressed air is transported in the pipe 12, the cavity 322 obstructs part of the airflow. This allows the gas to push the cone 32 and the nozzle 3 through the cavity 322, causing the nozzle to move outward toward the conical outlet 11 until the nozzle 31 pushes open the sealing plate 2 and is located outside the conical outlet 11, thus performing shock wave dust removal treatment. An annular limiting seat 13 is provided on the inner wall of the conical outlet 11, which mates with the outer wall of the cone 32 and the outer wall of the nozzle 3. The annular limiting seat 13 is fixed to the inner side of the conical outlet 11, limiting the movement of the cone 32 and ensuring that the nozzle 31 of the nozzle 3 can extend out of the conical opening 11 to its full position. The annular limiting seat 13 also abuts against the outer wall of the nozzle 3, providing a limiting guide for the movement of the nozzle 3. Multiple telescopic springs 14 are provided between the outer wall of the cone 32 and the inner wall of the annular limiting seat 13. The inner wall of 13 is provided with a receiving groove 131 for accommodating the telescopic spring 14. The telescopic spring 14 is provided so that when the shock wave dust removal stops, the telescopic spring 14 can drive the cone 32 and the nozzle 3 to move back into the cavity 12, so as to avoid the nozzle 3 being blocked outside the nozzle 1 and ensure that the sealing plate 2 can form a seal. The receiving groove 131 is provided so that when the annular limiting seat 13 limits the cone 32, it can accommodate the telescopic spring 14 and avoid the telescopic spring interfering with the movement of the cone 32.

[0018] like Figure 1-2As shown, the cone 32 has an annular positioning part 33 at its end that mates with the inner wall of the cavity 12. The engagement of the annular positioning part 33 with the inner wall of the cavity 12 makes the movement of the cone 32 and the nozzle 3 more stable and reliable. An annular protrusion 331 is provided on the outer side of the annular positioning part 33, and a groove 121 that mates with the annular protrusion 331 is provided on the inner wall of the cavity 12. Multiple annular protrusions 331 and grooves 121 are provided within the cavity 12 to guide and limit the movement of the cone 32 and the nozzle 3, preventing the cone 32 and the nozzle 3 from circumferentially deflecting relative to the cavity 12, thus affecting the stability of the airflow. The 121 is provided with a number of balls 122 that abut against the annular protrusion 331. The arrangement of the balls 122 can increase the smoothness of the movement of the cone 32 and the nozzle 3 and reduce wear. Both sides of the annular protrusion 331 are provided with baffles 332 for closing the groove 121. The inner wall of the cavity 12 is provided with a movable groove 123 for the baffles 332 to move. The baffles 332 are provided so that the groove 121 is kept closed when the annular protrusion 331 moves, preventing the balls 122 from falling out. The movable groove 123 can accommodate and limit the movement of the baffles 332 and keep the groove 121 closed.

[0019] like Figure 1 and 3 As shown, the upper side of the sealing plate 2 is rotatably connected to the outer end face of the conical outlet 11 via a rotating shaft 21. A torsion spring 22 is provided at the connection between the upper side of the sealing plate 2 and the outer end face of the conical outlet 11. The connection between the upper side of the sealing plate 2 and the outer end face of the conical outlet 11 via the rotating shaft 21 allows the sealing plate 2 to be flipped up and down. The sealing plate 2 can then be lowered by the action of the torsion spring 22 to form a natural seal on the conical outlet 11, ensuring the stable sealing of the nozzle 1 by the sealing plate 2 and preventing blockage caused by soot in the boiler.

[0020] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A shockwave soot blowing device for increasing the temperature of main steam, characterized in that: The system includes a nozzle (1) installed on the inner wall of the boiler. The nozzle (1) has a conical outlet (11) at its end. The nozzle (1) has a cavity (12) inside. The conical outlet (11) has a sealing plate (2) on its outer side for sealing the conical outlet (11). The cavity (12) has a nozzle (3) that can move axially to the outside of the conical outlet (11) and push open the sealing plate (2). The nozzle (3) has a nozzle (31) at one end facing the conical outlet (11). The other end of the nozzle (3) is connected to the cavity (12).

2. The shockwave soot blowing device for increasing the main steam temperature according to claim 1, characterized in that: The nozzle (3) is provided with a cone (32) that fits into the inner wall of the cavity (12). The inner wall of the cone outlet (11) is provided with an annular limiting seat (13) that fits into the outer wall of the cone (32) and the outer wall of the nozzle (3). One end of the cone (32) is connected to the nozzle (31), and the other end of the cone (32) is open and connected to the cavity (12).

3. The shockwave soot blowing device for increasing the main steam temperature according to claim 2, characterized in that: The inner wall of the cone (32) is provided with an annular inclined plate (321) that is arranged in the opposite direction to the direction of the nozzle (3) and inclined towards the center. An opening (322) is formed between the cone (32) and the annular inclined plate (321).

4. The shockwave soot blowing device for increasing the main steam temperature according to claim 2, characterized in that: Multiple telescopic springs (14) are provided between the outer wall of the cone (32) and the inner wall of the annular limiting seat (13), and the inner wall of the annular limiting seat (13) is provided with a receiving groove (131) for accommodating the telescopic springs (14).

5. The shockwave soot blowing device for increasing the main steam temperature according to claim 2, characterized in that: The cone (32) has an annular positioning part (33) at its end that mates with the inner wall of the cavity (12). The annular positioning part (33) has an annular protrusion (331) on its outer side. The inner wall of the cavity (12) has a groove (121) that mates with the annular protrusion (331). The groove (121) has a plurality of balls (122) that abut against the annular protrusion (331). Both sides of the annular protrusion (331) have baffles (332) for closing the groove (121). The inner wall of the cavity (12) has a movable groove (123) for moving the baffles (332).

6. The shockwave soot blowing device for increasing the main steam temperature according to claim 1, characterized in that: The upper side of the sealing plate (2) is rotatably connected to the outer end face of the conical outlet (11) via a rotating shaft (21), and a torsion spring (22) is provided at the connection between the upper side of the sealing plate (2) and the outer end face of the conical outlet (11).

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