Air preheater ash removal device and equipment

Abstract

The invention relates to an air preheater ash removal device and equipment, the air preheater ash removal device comprises an air preheater body, an ash removal assembly and a moving assembly, the air preheater body comprises supporting plates and a heat exchange tube, and the supporting plates are arranged at the two ends of the heat exchange tube; the multiple heat exchange pipes are distributed in the X-axis direction and the Z-axis direction of the supporting plate in an array mode. The ash removal assembly comprises a top beam, a bottom beam, a first rod and a second rod. The top beam and the bottom beam are arranged on the two sides of the air preheater body. The first rods are arranged between the heat exchange tubes in the X-axis direction, and the first rods are arranged on the top beam and connected with the bottom beam; the first rod is provided with a plurality of second rods in the axial direction, and the second rods are arranged between the heat exchange tubes in the Z-axis direction; the moving assembly comprises a linear module and a rail, the linear module is arranged in the axial direction of the heat exchange tube, the rail is arranged at the bottom of the bottom beam, and a sliding base of the linear module is connected with one end of the bottom beam. The ash removal device is high in removal efficiency, and can be used for removing fly ash between tube rows of the tubular air preheater on line in real time.

Description

Technical Field

[0001] The invention relates to the field of thermal energy engineering and environmental protection technology, in particular to an air preheater dust cleaning device and equipment. Background Art

[0002] Air preheaters are mainly used in industrial boiler systems such as coal-fired power plants and steel metallurgy. Their main function is to recover flue gas waste heat and improve boiler efficiency. Long-term use requires internal cleaning. The core of air preheater cleaning is to remove fly ash and ammonium bisulfate sticky deposits accumulated on the surface of the heat storage element to maintain heat exchange efficiency, reduce flue gas resistance and extend equipment life.

[0003] Existing cleaning technologies are mainly divided into three categories: the first is traditional mechanical steam soot blowing, which uses high-pressure steam jets to peel off accumulated ash, but has limited efficiency in removing compacted ash and poses a risk of pipe wall corrosion; the second is acoustic wave cleaning technology, which uses high-frequency sound waves to induce dust resonance and shedding, and has the advantages of non-contact and continuous operation, but has poor effects on dense compacted layers; the third is the shock wave soot blowing system developed in recent years, which uses the explosion of combustible gas to generate shock waves to penetrate the ash layer, and is suitable for treating sticky deposits, but has high requirements for the control system, and requires precise control of parameters such as the mixing ratio of combustible gas and air and the ignition time; it has certain safety risks and relatively high operating costs; the above three cleaning methods have poor cleaning effects, and all require shutdown during cleaning, making it difficult to achieve dynamic cleaning, affecting production efficiency. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that the air preheater has a poor cleaning effect and cannot be cleaned dynamically, resulting in low production efficiency.

[0005] In order to solve the above technical problems, the present invention provides an air preheater dust cleaning device, comprising: The air preheater body comprises a support plate and a heat exchange tube, the support plates are arranged at both ends of the heat exchange tube; the heat exchange tube is arranged in a plurality of arrays along the X-axis direction and the Z-axis direction of the support plate; A dust cleaning assembly, the dust cleaning assembly comprising a top beam, a bottom beam, a first rod and a second rod, the top beam and the bottom beam are respectively arranged at the top and the bottom of the air preheater body, and the top beam and the bottom beam are both arranged perpendicular to the axial direction of the heat exchange tube; the length of the first rod is greater than the length of the second rod, the first rod is arranged between any two adjacent heat exchange tubes along the X-axis direction, and the first rod is arranged to connect the top beam and the bottom beam; the first rod is axially provided with a plurality of second rods, the axial direction of the second rod is arranged perpendicular to the axial direction of the heat exchange tube, and the second rod is arranged between any two adjacent heat exchange tubes along the Z-axis direction; The moving component comprises a linear module and a track. The linear module is arranged along the axial direction of the heat exchange tube, the track is arranged at the bottom of the bottom beam, and the slide seat of the linear module is connected to one end of the bottom beam.

[0006] In one embodiment of the present invention, the dust cleaning assembly further comprises at least one pair of vertical beams, wherein the pair of vertical beams are arranged on the outside of the air preheater, and the vertical beams are arranged between the top beam and the bottom beam.

[0007] In one embodiment of the present invention, a driving assembly is further included. The driving assembly includes a worm wheel and a worm. The worm is axially arranged along the top beam. The first rod is sleeved with a worm wheel meshing with the worm.

[0008] In one embodiment of the present invention, a driving source is disposed on one side of the top beam, and an output end of the driving source is connected to the worm.

[0009] In one embodiment of the present invention, the second rod comprises two sub-rods of equal length, and the two sub-rods are arranged on both sides of the first rod.

[0010] In one embodiment of the present invention, the axial direction of the second rod is perpendicular to the axial direction of the first rod, and a gap is left between any two adjacent second rods along the X-axis direction.

[0011] In one embodiment of the present invention, the axial direction of the second rod is inclined to the axial direction of the first rod, and both ends of the second rod are arranged close to the heat exchange tube.

[0012] In one embodiment of the present invention, limit sensors are symmetrically arranged on both sides of the end of the bottom beam, a limit plate cooperating with the limit sensor is arranged on the support plate, and the limit sensor is electrically connected to the linear module.

[0013] In one embodiment of the present invention, a roller cooperating with the track is provided at the bottom of the bottom beam.

[0014] An air preheater dust cleaning device comprises the air preheater dust cleaning device.

[0015] The above technical solution of the present invention has the following advantages compared with the prior art: The present invention discloses an air preheater dust cleaning device and equipment, wherein a plurality of first rods are installed between the top beam and the bottom beam, and a plurality of second rods are installed on the first rods, so that the entire dust cleaning device has a mesh structure, and driven by the linear module, the plurality of first rods and the second rods are driven to move synchronously, so that the fly ash between each heat exchange tube can be cleaned. The air preheater dust cleaning device of the present invention has a simple structure, is safe and reliable, has a high cleaning efficiency, and can perform real-time online dust cleaning between rows of tubes of a tubular air preheater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein Figure 1 It is a side view of the overall structure of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the air preheater body; Figure 3 for Figure 1 The structural side view of the intermediate cleaning component; Figure 4 This is a structural front view of the dust removal component of the present invention; Figure 5 for Figure 4 A schematic diagram of the structure of the first rod and the second rod; Figure 6 It is a structural schematic diagram of Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of the structure of Embodiment 3 of the present invention; Explanation of the reference numerals in the specification: 1. air preheater body; 2. cleaning assembly; 3. moving assembly; 11. support plate; 12. heat exchange tube; 13. limit plate; 21. top beam; 22. bottom beam; 23. first rod; 24. second rod; 25. vertical beam; 26. worm gear; 27. worm; 28. driving source; 29. ​​bearing; 31. linear module; 32. track; 33. roller; 221. limit sensor; 241. sub-rod. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Embodiment 1

[0018] Reference Figure 1-Figure 6 As shown, the present invention discloses an air preheater dust cleaning device, comprising: The air preheater body 1 comprises a support plate 11 and a heat exchange tube 12, wherein the support plates 11 are arranged at both ends of the heat exchange tube 12; a plurality of heat exchange tubes 12 are arranged in an array along the X-axis direction and the Z-axis direction of the support plate 11; A dust cleaning component 2, the dust cleaning component 2 comprises a top beam 21, a bottom beam 22, a first rod 23 and a second rod 24, the top beam 21 and the bottom beam 22 are respectively arranged at the top and the bottom of the air preheater body 1, and the top beam 21 and the bottom beam 22 are both arranged perpendicular to the axial direction of the heat exchange tube 12; the length of the first rod 23 is greater than the length of the second rod 24, the first rod 23 is arranged between any two adjacent heat exchange tubes 12 along the X-axis direction, and the first rod 23 is arranged to connect the top beam 21 and the bottom beam 22; the first rod 23 is axially provided with a plurality of second rods 24, the axial direction of the second rod 24 is arranged perpendicular to the axial direction of the heat exchange tube 12, and the second rod 24 is arranged between any two adjacent heat exchange tubes 12 along the Z-axis direction; The moving component 3 includes a linear module 31 and a track 32 . The linear module 31 is arranged along the axial direction of the heat exchange tube 12 . The track 32 is arranged at the bottom of the bottom beam 22 . The slide seat of the linear module 31 is connected to one end of the bottom beam 22 .

[0019] The air preheater in the present invention is a tubular structure, including a plurality of heat exchange tubes 12, which are equidistantly arranged along the X-axis direction and the Z-axis direction, and the heat exchange tubes 12 are used to pass the flue gas. In the entire cleaning assembly 2, a plurality of first rods 23 are arranged between the gaps between any two heat exchange tubes 12 along the X-axis direction. The first rod 23 is a long rod. The first rod 23 is arranged along the Z-axis direction through the entire air preheater. The two ends of the first rod 23 are connected to the top beam 21 and the bottom beam 22 arranged on both sides of the air preheater, so that the axis of the first rod 23 is arranged perpendicular to the axis of the heat exchange tube 12; a plurality of second rods 24 are arranged between any two heat exchange tubes 12 along the Z-axis direction, and the second rods 24 are connected to the first rod 23. The entire first rod 23 and the second rod 24 form a mesh structure in the air preheater. The linear module 31 provides power in the moving component 3, and the linear module 31 drives the bottom beam 22 to reciprocate along the Z-axis direction. During the movement, the first rod 23 cleans the fly ash in the gap of the heat exchange tube 12 (in the X-axis direction), and the second rod 24 is used to clean the fly ash in the gap of the heat exchange tube 12 (in the Y-axis direction).

[0020] As a preferred solution of the present invention, during the actual installation process, the lengths of the heat exchange tubes 12 of different air preheaters are different, and it is necessary to add support plates 11 to the heat exchange tube 12 bracket. Similarly, the present invention can add multiple groups of cleaning devices to reciprocate between any two support plates 11.

[0021] Compared with the purging method in the prior art, the dust cleaning device in the present invention adopts mechanical dust cleaning, wherein the top beam 21 and the bottom beam 22 are equivalent to supports, a plurality of first rods 23 are installed between the top beam 21 and the bottom beam 22, and a plurality of second rods 24 are installed on the first rods 23, so that the entire dust cleaning device has a mesh structure, driven by the linear module 31, the plurality of first rods 23 and the second rods 24 are driven to move synchronously, and the fly ash between each heat exchange tube 12 can be cleaned. The dust cleaning device for the air preheater in the present invention has a simple structure, is safe and reliable, has a high cleaning efficiency, and can clean the fly ash between the tube rows of the tubular air preheater in real time online.

[0022] Furthermore, the dust cleaning assembly 2 further includes at least one pair of vertical beams 25 , wherein the pair of vertical beams 25 are arranged on the outside of the air preheater, and the vertical beams 25 are arranged between the top beam 21 and the bottom beam 22 .

[0023] Specifically, in order to ensure the rigid structure of the entire cleaning assembly 2, two vertical beams 25 are installed at both ends of the top beam 21 and the bottom beam 22, respectively, so that the appearance of the entire cleaning assembly 2 is a "door"-shaped structure, thereby ensuring the stability of the entire cleaning assembly 2.

[0024] Furthermore, two ends of the first rod 23 are rotatably connected to the top beam 21 and the bottom beam 22 , respectively, and bearings 29 cooperating with the first rod 23 are disposed in the top beam 21 and the bottom beam 22 .

[0025] Specifically, in the present invention, both ends of the first rod 23 are rotatably connected to the top beam 21 and the bottom beam 22 through bearings 29, so that the first rod 23 can rotate between the heat exchange tubes 12, and at the same time drive the second rod 24 to rotate at different angles, thereby achieving multi-angle cleaning and increasing the cleaning area.

[0026] Furthermore, a driving assembly is also included. The driving assembly includes a worm wheel 26 and a worm 27 . The worm 27 is axially arranged along the top beam 21 . The first rods 23 are sleeved with a worm wheel 26 meshing with the worm 27 .

[0027] Specifically, in order to ensure that each first rod 23 can rotate synchronously, as a preferred solution of the present invention, a worm wheel 26 is sleeved on each first rod 23, and a worm 27 is arranged along the axial direction of the top beam 21, so that the worm 27 is meshed with each worm wheel 26, and when the worm 27 is rotated, multiple worm wheels 26 are driven to rotate, thereby driving multiple first rods 23 to rotate synchronously and changing the direction of the second rod 24. Secondly, in order to prevent the smoke from passing through the worm wheel 26 and the worm 27 for a long time, causing the worm wheel 26 and the worm 27 to get stuck, a housing is arranged on the outer side of the top beam 21, and the worm wheel 26, the worm 27 and the bearing 29 are all covered in the top beam 21.

[0028] Furthermore, a driving source 28 is disposed on one side of the top beam 21 , and an output end of the driving source 28 is connected to the worm 27 .

[0029] Specifically, the rotation of the driving source 28 drives the rotation of the worm 27. As a preferred solution of the present invention, the driving source 28 is a servo motor, which can control the rotation angle of the worm 27 and adjust the rotation direction and angle according to actual conditions.

[0030] Furthermore, the second rod 24 includes two sub-rods 241 of equal length, and the two sub-rods 241 are arranged on both sides of the first rod 23 .

[0031] Specifically, in the actual production process, two sub-rods 241 of similar lengths are welded on both sides of the first rod 23 to ensure that the lengths of the sub-rods 241 on both sides of the first rod 23 are equal. After welding, the multiple second rods 24 are all in the same plane to ensure the synchronization of the movements of the second rods 24 during the rotation of the first rod 23.

[0032] Furthermore, the axial direction of the second rod 24 is perpendicular to the axial direction of the first rod 23 , and a gap is left between any two adjacent second rods 24 along the X-axis direction.

[0033] Specifically, in order to ensure the cleaning of the gaps of the heat exchange tubes 12 along the Y-axis direction, the length of the second rods 24 is guaranteed as much as possible, under the premise that any two adjacent second rods 24 do not interfere with each other, so that when multiple second rods 24 are perpendicular to the heat exchange tubes 12, they cover the entire gap of the heat exchange tubes 12, which is equivalent to multiple second rods 24 being formed into one to clean the gaps of the heat exchange tubes 12 in the Y-axis direction. At the same time, in order to ensure the cleaning effect, as a preferred solution of the present invention, the gap between any two adjacent second rods 24 along the X-axis direction is 3mm-5mm, and the size of the gap is minimized to improve the cleaning efficiency.

[0034] Furthermore, limit sensors 221 are symmetrically arranged on both sides of the end of the bottom beam 22 , a limit plate 13 cooperating with the limit sensor 221 is arranged on the support plate 11 , and the limit sensor 221 is electrically connected to the linear module 31 .

[0035] Specifically, in the actual cleaning process, the linear module 31 drives the bottom beam 22 to reciprocate. When it moves to the side of the support plate 11, the limit sensor 221 couples the signal with the limit plate 13, and then controls the linear module 31 to stop moving through the arrival signal, and the bottom beam 22 stops moving to avoid the cleaning component 2 from colliding with the support plate 11.

[0036] Further, the bottom of the bottom beam 22 is provided with a roller 33 that cooperates with the track 32. Specifically, the roller 33 provided at the bottom of the bottom beam 22 facilitates the movement of the entire bottom beam 22. Embodiment 2

[0037] In the above embodiment, a structure in which a plurality of second rods 24 are arranged on each first rod 23 is adopted. In order to avoid interference between the second rods 24, a gap is left between any two adjacent second rods 24 along the X-axis direction. Figure 7 As shown, in this embodiment, a plurality of second rods 24 are arranged on each first rod 23 along the X-axis direction. Compared with the solution of the first embodiment, this embodiment extends the length of the second rod 24, reduces the accumulation of gaps between adjacent second rods 24, and improves the cleaning efficiency. Embodiment 3

[0038] Reference Figure 8 As shown, the axial direction of the second rod 24 is inclined to the axial direction of the first rod 23 , and both ends of the second rod 24 are arranged close to the heat exchange tube 12 .

[0039] Specifically, as an embodiment of the present invention, the axial direction of the second rod 24 is inclined so that the two ends of the second rod 24 are closely attached to the heat exchange tube 12. Compared with the structure in the first embodiment, on the one hand, the length of the second rod 24 can be extended, and the first rod 23 can drive the second rod 24 to rotate a larger area during the rotation process; on the other hand, the problem of interference between two adjacent second rods 24 in the X-axis direction can be effectively solved, but the inclination angle of the second rod 24 needs to be controlled to avoid the second rod 24 from contacting the outer wall of the heat exchange tube 12. In actual operation, the first rod 23 drives the inclined second rod 24 to rotate 180° to clean the fly ash in the gap of the heat exchange tube 12 as much as possible. It should be noted that it is necessary to ensure that the inclination directions of the multiple second rods 24 in the X-axis direction are consistent, and the multiple second rods 24 in the X-axis direction are in the same plane to ensure the synchronization of the rotation of the second rod 24 when the first rod 23 is rotated. Embodiment 4

[0040] An air preheater cleaning device comprises the air preheater cleaning device described in the first embodiment.

[0041] In summary, the present invention introduces an air preheater dust cleaning device and equipment. In the present invention, the top beam 21 and the bottom beam 22 of the dust cleaning component 2 are equivalent to supports, and multiple first rods 23 are installed between the top beam 21 and the bottom beam 22, and multiple second rods 24 are installed on the first rods 23, so that the entire dust cleaning device has a mesh structure. Driven by the linear module 31, the multiple first rods 23 and the second rods 24 are driven to move synchronously, and the fly ash between each heat exchange tube 12 can be cleaned. The air preheater dust cleaning device in the present invention has a simple structure, is safe and reliable, has a high cleaning efficiency, and can perform real-time online dust cleaning between tube rows of a tubular air preheater.

[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. An air preheater dust cleaning device, characterized in that: include: The air preheater body comprises a support plate and a heat exchange tube, the support plates are arranged at both ends of the heat exchange tube; the heat exchange tube is arranged in a plurality of arrays along the X-axis direction and the Z-axis direction of the support plate; A dust cleaning assembly, the dust cleaning assembly comprising a top beam, a bottom beam, a first rod and a second rod, the top beam and the bottom beam are respectively arranged at the top and the bottom of the air preheater body, and the top beam and the bottom beam are both arranged perpendicular to the axial direction of the heat exchange tube; the length of the first rod is greater than the length of the second rod, the first rod is arranged between any two adjacent heat exchange tubes along the X-axis direction, and the first rod is arranged to connect the top beam and the bottom beam; the first rod is axially provided with a plurality of second rods, the axial direction of the second rod is arranged perpendicular to the axial direction of the heat exchange tube, and the second rod is arranged between any two adjacent heat exchange tubes along the Z-axis direction; The moving component comprises a linear module and a track. The linear module is arranged along the axial direction of the heat exchange tube, the track is arranged at the bottom of the bottom beam, and the slide seat of the linear module is connected to one end of the bottom beam.

2. The air preheater cleaning device according to claim 1, characterized in that: The dust cleaning assembly further comprises at least one pair of vertical beams, wherein the pair of vertical beams are arranged on the outside of the air preheater, and the vertical beams are arranged between the top beam and the bottom beam.

3. The air preheater cleaning device according to claim 1, characterized in that: It also includes a driving assembly, which includes a worm wheel and a worm. The worm is axially arranged along the top beam, and the first rod is sleeved with a worm wheel meshing with the worm.

4. The air preheater dust cleaning device according to claim 3, characterized in that: A driving source is disposed on one side of the top beam, and an output end of the driving source is connected to the worm.

5. The air preheater cleaning device according to claim 1, characterized in that: The second rod includes two sub-rods with equal lengths, and the two sub-rods are arranged on both sides of the first rod.

6. The air preheater dust cleaning device according to claim 1, characterized in that: The axial direction of the second rod is perpendicular to the axial direction of the first rod, and a gap is left between any two adjacent second rods along the X-axis direction.

7. The air preheater dust cleaning device according to claim 1, characterized in that: The axial direction of the second rod is inclined to the axial direction of the first rod, and both ends of the second rod are arranged close to the heat exchange tube.

8. The air preheater dust cleaning device according to claim 1, characterized in that: Limit sensors are symmetrically arranged on both sides of the end of the bottom beam, a limit plate cooperating with the limit sensor is arranged on the support plate, and the limit sensor is electrically connected to the linear module.

9. The air preheater dust cleaning device according to claim 1, characterized in that: The bottom of the bottom beam is provided with a roller matched with the track.

10. An air preheater cleaning device, characterized in that: It comprises an air preheater cleaning device as described in any one of claims 1 to 9.

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