Efficient ash removal device for water cooling wall of boiler

Abstract

The utility model discloses a boiler water-cooled wall high-efficiency deashing device which comprises a sound wave generator, a sound amplification section, a steering section and a sound generation section which are connected in sequence, a deashing barrel with one open end and one closed end is arranged at the outlet end of the sound generation section, a plurality of reflecting plates are arranged in the deashing barrel, a plurality of sound generation openings are formed in the annular side face of the deashing barrel, and the sound generation openings are communicated with the sound generation section. The reflecting direction of the reflecting plate corresponds to the sound outlet; an annular pipe is arranged outside the sound making section, a plurality of longitudinal extending pipes located on the outer periphery of the ash removal barrel are distributed on the circumference of the annular pipe, a plurality of transverse spraying pipes are arranged on the longitudinal extending pipes, and nozzles facing the water cooling wall are arranged on the transverse spraying pipes. The ash removal device has the characteristics of enlarging the ash removal range, improving the ash removal effect and reducing the damage to the water cooling wall.

Description

Technical Field

[0001] This utility model relates to a boiler cleaning device, and more particularly to a high-efficiency ash removal device for boiler water-cooled walls. Background Technology

[0002] Water-cooled walls consist of multiple parallel steel pipes, which are usually laid vertically on the inner wall of the boiler furnace to form a continuous heating plane. Water or steam flows inside the pipes, absorbing the radiant heat from the high-temperature flames or flue gas in the boiler furnace, generating steam or hot water inside the pipes, and reducing the furnace wall temperature to protect the furnace wall.

[0003] During boiler operation, ash and slag buildup occurs on the water-cooled walls. This buildup not only affects the boiler's heat exchange efficiency and operating performance, but also leads to high-temperature and low-temperature corrosion of the water-cooled walls, increasing the likelihood of tube rupture, reducing boiler lifespan, and compromising safe operation. Therefore, power plant boilers are required to be equipped with ash removal devices.

[0004] Existing cleaning methods include physical methods such as manual or mechanical vibration and scraping, as well as impact cleaning methods such as steam cleaners, sonic cleaners, and sandblasting cleaners. Among these, physical cleaning methods are inefficient, difficult to thoroughly clean, and easily damage the pipe wall; steam cleaners and sandblasting cleaners exert a large impact force on the pipe wall, which can easily wear down the water-cooled wall; while sonic cleaners have a limited and singular cleaning range, require frequent changes in direction for operation, and cannot completely destroy the intermolecular forces for highly adhesive materials, resulting in poor cleaning effect. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency ash removal device for boiler water-cooled walls. This invention features an expanded ash removal range, improved ash removal effect, and reduced damage to the water-cooled walls.

[0006] The technical solution of this utility model: a high-efficiency ash removal device for boiler water-cooled walls, comprising a sound wave generator, a sound amplification section, a turning section, and a sound output section connected in sequence. The outlet end of the sound output section is provided with an ash removal cylinder with one end open and the other end closed. The interior of the ash removal cylinder is provided with multiple reflectors, and the annular side of the ash removal cylinder is provided with multiple sound outlets. The reflection direction of the reflectors corresponds to the sound outlets. The exterior of the sound output section is provided with an annular pipe, and multiple longitudinally extending pipes located around the outer periphery of the ash removal cylinder are distributed on the annular pipe. Several transverse spray pipes are provided on the longitudinally extending pipes, and nozzles facing the water-cooled wall are provided on the transverse spray pipes.

[0007] In the aforementioned high-efficiency ash removal device for boiler water-cooled walls, the side of the nozzle is provided with a plurality of first injection holes along the circumferential direction, the end of the nozzle is provided with a second injection hole, and the periphery of the second injection hole is provided with a plurality of third injection holes.

[0008] In the aforementioned high-efficiency ash removal device for boiler water-cooled walls, an ultrasonic vibration plate is provided between two adjacent transverse spray pipes. The ultrasonic vibration plate is electrically connected to an ultrasonic generator, and the ultrasonic vibration plate is provided with ash removal brushes that contact the water-cooled wall.

[0009] In the aforementioned boiler water-cooled wall high-efficiency ash removal device, the turning section has a bent structure, a reflector is provided at the concave corner of the turning section, and the sound-emitting section has a horn-shaped structure.

[0010] In the aforementioned boiler water-cooled wall high-efficiency ash removal device, the turning section is connected to the sound amplification section through a turning head. The turning head is provided with an arc-shaped groove, and the arc-shaped groove is provided with a fixing bolt connected to the sound amplification section.

[0011] In the aforementioned boiler water-cooled wall high-efficiency ash removal device, the reflector plate includes a first reflector plate located at the closed end and a second reflector plate located on the side. The first reflector plate is conical, and the sound outlet includes a first sound outlet corresponding to the reflection direction of the first reflector plate and a second sound outlet corresponding to the reflection direction of the second reflector plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention, by setting reflectors inside the cleaning cylinder, allows sound waves that propagate in only one direction to diffuse from multiple sound outlets around the cleaning cylinder in multiple directions to the water-cooled wall through the reflection and superposition of multiple reflectors, forming a larger circular cleaning range. This expands the cleaning range of the sound waves while reducing sound wave loss, thus achieving high efficiency in sound wave cleaning.

[0014] This invention also includes an annular pipe, a longitudinally extending pipe, a transverse spray pipe, and nozzles. High-pressure steam is used as the jet power source. The nozzles further impinge steam onto the water-cooled wall surface to remove stubborn dust, wet the dust surface, reduce its adhesion, and accelerate the removal of dust from the heated surface or catalyst surface. Combined with sonic cleaning, the sonic vibration promotes the uniform coverage of water mist over the dust accumulation area, forming a dual purification, expanding the cleaning coverage, reducing cleaning dead corners, and improving cleaning efficiency.

[0015] The nozzle is equipped with multiple spray holes, which not only disperses the spray pressure of high-pressure steam and reduces damage to the water-cooled wall, but also expands the spray cleaning range and improves the dust removal efficiency.

[0016] Therefore, this utility model has the characteristics of expanding the cleaning range, improving the cleaning effect, and reducing damage to the water-cooled wall. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the nozzle structure.

[0019] The labels in the attached diagram are as follows: 1. Sound wave generator; 2. Sound amplification section; 3. Direction section; 31. Reflector; 32. Direction head; 33. Arc groove; 34. Fixing bolt; 4. Sound output section; 5. Dust removal cylinder; 51. First reflector; 52. First sound outlet; 53. Second sound outlet; 6. Annular pipe; 61. Longitudinal extension pipe; 62. Transverse nozzle; 63. Nozzle; 64. First spray hole; 65. Second spray hole; 66. Third spray hole; 67. Guide pipe; 7. Ultrasonic vibrating plate; 71. Dust removal brush. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a hinged connection, a rotating connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Example:

[0023] like Figures 1-2 As shown, the boiler water-cooled wall high-efficiency ash removal device includes a sound wave generator 1, a sound amplification section 2, a diverting section 3, and a sound output section 4 connected in sequence. The sound wave generator 1 is connected to compressed air. The outlet end of the sound output section 4 is equipped with an ash removal cylinder 5, which is open at one end and closed at the other. The open end of the ash removal cylinder 5 is connected to the sound output section 4. The interior of the ash removal cylinder 5 is equipped with multiple reflectors, and the annular side of the ash removal cylinder 5 is equipped with multiple sound outlets. The reflection direction of the reflectors corresponds to the sound outlets. The exterior of the sound output section 4 is equipped with an annular pipe 6, which is connected to high-pressure steam through a guide pipe 67. Multiple longitudinal extension pipes 61 are distributed circumferentially around the outer periphery of the ash removal cylinder 5 on the annular pipe 6. Several transverse spray pipes 62 are provided on the longitudinal extension pipes 61, and nozzles 63 facing the water-cooled wall are provided on the transverse spray pipes 62. The longitudinal extension pipes 61 and the sound outlets are staggered to avoid interference. The transverse spray pipes 62 are distributed according to the direction of the water-cooled wall to improve the accuracy and efficiency of the nozzles 63 in cleaning the water-cooled wall.

[0024] This invention, by setting a reflector plate inside the cleaning cylinder 5, allows sound waves that propagate in only one direction to diffuse in multiple directions from multiple sound outlets around the cleaning cylinder 5 to the water-cooled wall through the reflection and superposition of multiple reflectors, forming a larger circular cleaning range. This expands the cleaning range of the sound waves while reducing sound wave loss, thus achieving high efficiency in sound wave cleaning.

[0025] This invention also includes an annular pipe 6, a longitudinally extending pipe 61, a transverse spray pipe 62, and a nozzle 63. High-pressure steam is used as the jet power source. The nozzle 63 further blows steam onto the water-cooled wall surface around the perimeter to remove stubborn dust, wets the dust surface, reduces its adhesion, and accelerates the removal of dust from the heated surface or catalyst surface. Combined with sonic cleaning, the sonic vibration promotes the uniform coverage of water mist over the dust accumulation area, forming a dual purification, expanding the cleaning coverage, reducing cleaning dead spots, and improving cleaning efficiency.

[0026] The nozzle 63 has several first injection holes 64 arranged circumferentially on its side, and a second injection hole 65 arranged at its end. Several third injection holes 66 are arranged around the periphery of the second injection holes 65. The inner diameter of the channel inside the nozzle 63 gradually decreases along the injection direction, increasing the flow velocity, reducing the pressure, and preventing excessive pressure from damaging the water-cooled wall. The second injection hole 65 has a conical structure, expanding the injection range. This invention uses multiple injection holes distributed at different positions to both disperse the injection pressure of high-pressure steam and expand the cleaning range, thereby improving dust removal efficiency.

[0027] An ultrasonic vibrating plate 7 is installed between two adjacent transverse spray pipes 62. The ultrasonic vibrating plate 7 is electrically connected to an ultrasonic generator, and a cleaning brush 71 is installed on the ultrasonic vibrating plate 7 to contact the water-cooled wall. The cleaning brush 71 on the ultrasonic vibrating plate 7 extends into the gap between adjacent water-cooled pipes. The ultrasonic vibrating plate 7 drives the cleaning brush 71 to vibrate, performing high-frequency vibration brushing on the gaps between the cooling pipes on the water-cooled wall. This allows for better cleaning of some hidden and narrow gaps, improving the cleaning effect. Furthermore, the ultrasonic vibrating plate 7 is fixed on the transverse spray pipe 62, and the high-frequency vibration makes it less likely for the interior of the transverse spray pipe 62 to become clogged.

[0028] The turning section 3 has a bent structure, and a reflector 31 is provided at the concave corner of the turning section 3. The reflector guides the sound waves in the turning section 3 to the outlet of the turning section 3 as much as possible, thereby reducing sound wave loss; the sound outlet section 4 has a horn-shaped structure.

[0029] The turning section 3 is connected to the sound amplification section 2 via a turning head 32. The turning head 32 is provided with an arc-shaped groove 33, and a fixing bolt 34 for connecting to the sound amplification section 2 is provided on the arc-shaped groove 33. By rotating the turning head 32, the outlet position of the turning section 3 can be adjusted, thereby adjusting the direction and position of the cleaning cylinder 5 and the nozzle 63 to better align with the water-cooled wall.

[0030] The reflector includes a first reflector 51 located at the closed end and a second reflector located on the side. The first reflector 51 is conical. The sound outlet includes a first sound outlet 52 corresponding to the reflection direction of the first reflector 51 and a second sound outlet 53 corresponding to the reflection direction of the second reflector. The positions of the first sound outlet and the second sound outlet can be set differently. Multiple reflectors are used to diffuse the sound waves as widely as possible from multiple sound outlets.

[0031] The parts of this utility model not described in detail are existing technologies and therefore will not be specifically described here.

Claims

1. A high-efficiency ash removal device for boiler water-cooled walls, characterized in that: The system includes a sound wave generator (1), a sound amplification section (2), a turning section (3), and a sound output section (4) connected in sequence. The outlet end of the sound output section (4) is provided with a cleaning cylinder (5) that is open at one end and closed at the other end. The interior of the cleaning cylinder (5) is provided with multiple reflectors. The annular side of the cleaning cylinder (5) is provided with multiple sound outlets. The reflection direction of the reflectors corresponds to the sound outlets. The exterior of the sound output section (4) is provided with an annular pipe (6). The annular pipe (6) is circumferentially distributed with multiple longitudinal extension pipes (61) located around the outer periphery of the cleaning cylinder (5). The longitudinal extension pipes (61) are provided with several transverse spray pipes (62). The transverse spray pipes (62) are provided with nozzles (63) facing the water-cooled wall.

2. The high-efficiency ash removal device for boiler water-cooled walls according to claim 1, characterized in that: The nozzle (63) has a plurality of first injection holes (64) on its side along the circumferential direction, a second injection hole (65) at the end of the nozzle (63), and a plurality of third injection holes (66) around the second injection hole (65).

3. The high-efficiency ash removal device for boiler water-cooled walls according to claim 1, characterized in that: An ultrasonic vibration plate (7) is provided between two adjacent transverse nozzles (62). The ultrasonic vibration plate (7) is electrically connected to the ultrasonic generator. A cleaning brush (71) that contacts the water-cooled wall is provided on the ultrasonic vibration plate (7).

4. The high-efficiency ash removal device for boiler water-cooled walls according to claim 1, characterized in that: The steering section (3) has a bent structure, and a reflector (31) is provided at the concave corner of the steering section (3). The sound output section (4) has a horn-shaped structure.

5. The high-efficiency ash removal device for boiler water-cooled walls according to claim 1, characterized in that: The steering section (3) is connected to the sound amplification section (2) through the steering head (32). The steering head (32) is provided with an arc groove (33), and the arc groove (33) is provided with a fixing bolt (34) connected to the sound amplification section (2).

6. The high-efficiency ash removal device for boiler water-cooled walls according to claim 1, characterized in that: The reflector includes a first reflector (51) located at the closed end and a second reflector located on the side. The first reflector (51) is conical. The sound outlet includes a first sound outlet (52) corresponding to the reflection direction of the first reflector (51) and a second sound outlet (53) corresponding to the reflection direction of the second reflector.

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