A pressure reducing sootblower for a boiler of a thermal power plant and a method of using the same

Abstract

The application provides a pressure-reducing soot blower for a boiler of a thermal power plant and a use method thereof. The soot blower comprises a bearing base, a soot blower body, a blowing assembly and a horizontal moving assembly. The soot blower body and the horizontal moving assembly are fixed on the bearing base respectively. The blowing assembly is connected with the soot blower body. The blowing assembly is connected with the horizontal moving assembly and can move back and forth under the action of the horizontal moving assembly. The blowing assembly can move back and forth in the boiler by the horizontal moving assembly, so that the soot blowing can be performed without dead angle, and the soot blowing efficiency is higher.

Description

Technical Field

[0001] This invention relates to the field of boiler cleaning technology in thermal power plants, and in particular to a pressure-reducing soot blower for thermal power plant boilers and its usage method. Background Technology

[0002] During the long-term operation of boilers in thermal power plants, ash and coke will accumulate on the heating surfaces, which will worsen the heat transfer. For the tail flue, the long-term accumulation of combustibles may also lead to serious accidents such as re-combustion. Therefore, after the boiler has been running for a period of time, it is necessary to blow soot onto the heating surfaces to clean them.

[0003] Chinese invention patent CN217816817U discloses a novel pressure-reducing sootblower for thermal power plant boilers. It primarily utilizes a tapping and vibration method to address the limitations of limited sootblowing range, blind spots, and insufficient ash removal efficiency. However, after in-depth research into the aforementioned patent and boiler sootblowing practices, the following problems were discovered: Most thermal power plant boilers have large volumes and internal dimensions. Due to the limited extension range of the base lifting motor, it may be impossible to tap and vibrate the boiler's inner wall, resulting in incomplete sootblowing. Therefore, there is an urgent need to improve existing boiler pressure-reducing sootblowers and provide a new pressure-reducing sootblower for thermal power plant boilers. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure-reducing soot blower for a thermal power plant boiler and its usage method, which enables the blowing assembly to move back and forth inside the boiler, allowing for soot blowing without dead angles and achieving higher soot blowing efficiency.

[0005] According to one objective of the present invention, a pressure-reducing soot blower for a thermal power plant boiler is provided, comprising a supporting base plate, a soot blower body, an air blowing assembly, and a horizontal moving assembly. The soot blower body and the horizontal moving assembly are respectively fixed on the supporting base plate. The air blowing assembly is connected to the soot blower body and is connected to the horizontal moving assembly and can move back and forth under the action of the horizontal moving assembly.

[0006] Furthermore, the air blowing assembly is connected to the soot blower body via a metal bellows.

[0007] Furthermore, a support guide frame is fixed on the bearing base plate.

[0008] Furthermore, the air blowing assembly includes an air blowing pipe and a rotary joint. One end of the air blowing pipe is connected to the rotary joint, and a plurality of equally spaced air outlet holes are provided on the side wall of the air blowing pipe away from the rotary joint.

[0009] Further, the head end of the blowing pipe is in a conical structure, and the blowing pipe is provided with an air outlet hole at the head end, and the diameter of the air outlet hole is the same as that of the air outlet hole.

[0010] Further, the horizontal moving assembly comprises a supporting plate, a fixing sleeve and a guide rod, the bottom of the supporting plate is fixed with the fixing sleeve, the fixing sleeve is arranged correspondingly with the guide rod, the two ends of the guide rod are fixed on the supporting plate respectively, and the fixing sleeve is sleeved on the guide rod and can move along the guide rod.

[0011] Further, the number of the guide rods is two, and the two guide rods are arranged in parallel with each other.

[0012] Further, the bottom of the rotary joint is fixed with a connecting rod, and the connecting rod is fixed on the supporting plate.

[0013] Further, the outer wall of one end of the blowing pipe provided with the rotary joint is fixedly connected with a first gear, the supporting plate is fixed with a driving motor, the output shaft of the driving motor is fixedly connected with a second gear, the second gear is meshed with the first gear, the outer wall of the blowing pipe is provided with a wave-shaped guide groove, and the top of the supporting guide frame is provided with horizontal protruding portions and extends into the guide groove.

[0014] Further, the guide groove is a wave-shaped guide groove connected in a head-to-tail mode.

[0015] According to another purpose of the present application, the present application provides a use method of the pressure-reducing soot blower for a boiler of a thermal power plant, which comprises the following steps:

[0016] S1, one end of the blowing pipe is inserted into the boiler, the soot blower body is started to supply air to the blowing pipe, and the blowing pipe is used to blow dust on the boiler through the air outlet hole and the air outlet hole;

[0017] S2, the driving motor is started to drive the second gear and the first gear to rotate the blowing pipe, and the blowing pipe moves reciprocatingly under the action of the guide groove and the supporting guide frame, so that the blowing pipe rotates and moves reciprocatingly, and the blowing pipe blows dust without dead angle;

[0018] S3, during the movement of the blowing assembly, the connecting rod pulls the supporting plate and the driving motor to move synchronously along the guide rod, so that the first gear and the second gear are always meshed, and the stable operation of the soot blower is ensured.

[0019] The technical scheme of the present application drives the blowing assembly to move reciprocatingly through the horizontal moving assembly, so that the blowing assembly moves reciprocatingly in the boiler, the blowing assembly blows dust without dead angle, and the blowing efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on these drawings.

[0021] Figure 1 Structure schematic diagram of an embodiment of the present application;

[0022] Figure 2 Another structure schematic diagram of an embodiment of the present application;

[0023] Figure 3 Structure schematic diagram of a blowing assembly of an embodiment of the present application;

[0024] Figure 4 Structure schematic diagram of a blowing assembly of an embodiment of the present application;

[0025] Figure 5 Structure schematic diagram of a blowing assembly of an embodiment of the present application;

[0026] In the figure: 1, bearing bottom plate; 2, soot blower body; 3, metal corrugated pipe; 4, blowing assembly; 41, blowing pipe; 42, rotary joint; 43, first gear; 44, connecting rod; 5, support guide frame; 6, driving motor; 7, second gear; 8, horizontal moving assembly; 81, supporting plate; 82, fixed sleeve; 83, guide rod. DETAILED DESCRIPTION

[0027] The technical solutions of the present application will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0029] In addition, the terms "first", "second", "third", etc. are used herein only to describe different instances, and are not used to indicate or imply relative importance or a number of indicated technical features. Thus, features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] Embodiment 1

[0031] As shown in Figures 1-5 A pressure reducing sootblower for a boiler of a thermal power plant, comprising a bearing base plate 1, a sootblower body 2 and a blowing assembly 4, the sootblower body 2 is fixed on the bearing base plate 1, the right end of the sootblower body 2 is connected with a metal bellows 3, and the right end of the metal bellows 3 is provided with the blowing assembly 4. The sootblower body 2 is used to blow the boiler, and under the action of the metal bellows 3, the sootblower body 2 can continuously supply air to the blowing assembly 4.

[0032] A support guide frame 5 is welded above the bearing base plate 1, and the end of the blowing assembly 4 away from the metal bellows 3 is arranged on the support guide frame 5. Under the action of the support guide frame 5, the blowing assembly 4 can be supported.

[0033] As shown in Figure 3 In this embodiment, the blowing assembly 4 comprises a blowing pipe 41, a rotary joint 42, a first gear 43 and a connecting rod 44, the left end of the blowing pipe 41 is connected with the rotary joint 42, the end of the blowing pipe 41 where the rotary joint 42 is installed is fixedly connected with the first gear 43 on the outer wall, the blowing pipe 41 and the first gear 43 are fixed with each other by welding, and the bottom of the rotary joint 42 is welded with the connecting rod 44.

[0034] The horizontal moving assembly 8 is fixed above the front end of the bearing bottom plate 1, and one end of the blowing assembly 4 is fixed on the horizontal moving assembly 8 and can slide along the horizontal moving assembly 8. Specifically, the horizontal moving assembly 8 comprises a supporting plate 81, two fixed sleeves 82 and two guide rods 83, the two fixed sleeves 82 are welded to the bottom of the supporting plate 81, the two guide rods 83 are arranged in parallel, the two ends of the two guide rods 80 are respectively welded and fixed to the bearing bottom plate 1, the two fixed sleeves 82 are sleeved on the corresponding guide rods 83 and are in sliding connection with the guide rods 83, and the sliding direction of the supporting plate 81 can be limited through the arrangement of the guide rods 83. The connecting rod 44 of the blowing assembly 4 is welded and fixed to the supporting plate 81, so that the blowing assembly 4 can slide on the guide rods 83 along with the supporting plate 81.

[0035] A plurality of air outlet holes are arranged on the right side of the blowing pipe 41 in an equidistant manner, and the head end of the blowing pipe 41 is designed in a conical structure to better achieve the blowing effect, and the opening at the front end of the blowing pipe is designed as a circular hole structure with the same diameter as the air outlet hole in the side wall, and the blowing pipe 41 is used for blowing ash from the boiler through the air outlet hole at the right end of the blowing pipe 41 and the plurality of air outlet holes arranged at the right end thereof.

[0036] A wave-shaped guide groove is arranged on the left end of the outer wall of the blowing pipe 41, and the head and tail of the guide groove are connected. The two ends of the supporting guide frame 5 are arranged on the two sides of the blowing pipe 41, and the top ends of the supporting guide frame 5 are provided with horizontal protruding portions and extend into the guide groove on the outer wall of the blowing pipe 41. By arranging the supporting guide frame 5 in the guide groove, the blowing pipe 41 can be supported and guided to move while rotating.

[0037] In order to realize the rotation of the blowing pipe 41 of the blowing assembly 4, a driving motor 6 is fixed on the horizontal moving assembly 8, the output shaft of the driving motor 6 is fixedly connected with a second gear 7, the second gear 7 is in meshing connection with the first gear 43, the rotation of the second gear 7 is controlled by the driving motor 6, the blowing pipe 41 is rotated through the first gear 43 in meshing connection with the second gear 7, the blowing assembly 4 moves along with the horizontal moving assembly 8, the driving motor 6 moves synchronously with the blowing assembly 4 through the arrangement of the horizontal moving assembly 8, the blowing assembly 4, the supporting plate 81, the driving motor 6 and the second gear 7 move synchronously under the action of the connecting rod 44, and the stability of the operation of the blowing ash device is ensured.

[0038] The working principle of the present application is as follows:

[0039] In use, one end of the blowing pipe 41 is inserted into the boiler, the blowing ash device body 2 is started, the metal corrugated pipe 3 and the rotary joint 42 are used to supply air to the blowing pipe 41, and the blowing pipe 41 is used for blowing ash from the boiler through the air outlet hole at the right end of the blowing pipe 41 and the plurality of air outlet holes arranged at the right end thereof.

[0040] The driving motor 6 is started, the second gear 7 is controlled to rotate, and the air blowing pipe 41 on the right side of the rotary joint 42 is driven to rotate by the first gear 43. In this process, the air blowing pipe 41 can move reciprocatingly according to the driving motor while rotating through the guide groove on the left end outer wall of the air blowing pipe 41 and the support guide frame 5, so that the end of the air blowing pipe 41 provided with the air outlet hole can move reciprocatingly while rotating in the boiler, and the dust blowing can be performed without dead angle, and the dust blowing efficiency is higher.

[0041] In the moving process of the air blowing assembly 4, the connecting rod 44 can pull the supporting plate 81 and the driving motor 6 to move synchronously along the guide rod 83, so that the first gear 43 and the second gear 7 can be always engaged, the stable operation of the dust blower is ensured, and the air blowing pipe 41 in the running state can be continuously supplied with air through the metal bellows 3 with the length automatically adjusted and the rotary joint 42, so that the dust blowing work can be normally performed.

[0042] The first gear can drive the air blowing pipe to rotate slowly through the driving motor controlling the second gear to rotate slowly, so that the air blowing pipe can move reciprocatingly while rotating through the guide groove on the outer wall of the air blowing pipe and the support guide frame, the end of the air blowing pipe provided with the air outlet hole can move reciprocatingly while rotating in the boiler, the dust blowing can be performed without dead angle, and the dust blowing efficiency is higher. In the moving process of the air blowing assembly, the connecting rod can drive the supporting plate, the driving motor and the second gear to move synchronously along the guide rod, so that the first gear and the second gear are not disengaged to cause the device to be unable to normally operate, and the air blowing pipe can be continuously supplied with air through the metal bellows with the length automatically adjusted and the rotary joint.

[0043] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pressure-reducing soot blower for a thermal power plant boiler, characterized in that, The device includes a base plate, a soot blower body, an air blowing assembly, and a horizontal moving assembly. The soot blower body and the horizontal moving assembly are respectively fixed to the base plate. The air blowing assembly is connected to the soot blower body and is also connected to the horizontal moving assembly, allowing it to reciprocate back and forth under the action of the horizontal moving assembly. The air blowing assembly and the soot blower body are connected via a metal bellows. The air blowing assembly includes an air blowing pipe and a rotary joint. One end of the air blowing pipe is connected to the rotary joint, and the side of the air blowing pipe away from the rotary joint... The side wall is provided with several air outlet holes that are opened at equal intervals; the head end of the air blowing pipe is tapered, and the front end of the air blowing pipe is provided with an air outlet hole, the diameter of which is the same as the diameter of the air outlet hole; a wavy guide groove is provided on the outer wall of the left end of the air blowing pipe; the horizontal moving component includes a support plate, a fixed sleeve and a guide rod, the bottom of the support plate is fixed with the fixed sleeve, the fixed sleeve is correspondingly arranged with the guide rod, the two ends of the guide rod are respectively fixed with the bearing base plate, and the fixed sleeve is sleeved on the guide rod and can slide freely along the guide rod.

2. The pressure-reducing soot blower for thermal power plant boilers according to claim 1, characterized in that, A support guide frame is fixed on the bearing base plate.

3. The pressure-reducing soot blower for thermal power plant boilers according to claim 1, characterized in that, The number of guide rods is two, and the two guide rods are arranged parallel to each other.

4. The pressure-reducing soot blower for thermal power plant boilers according to claim 2, characterized in that, A connecting rod is fixed to the bottom of the rotary joint, and the connecting rod is fixed to the support plate.

5. The pressure-reducing soot blower for a thermal power plant boiler according to claim 4, characterized in that, A first gear is fixedly connected to the outer wall of one end of the air blowing pipe where the rotary joint is installed. A drive motor is fixedly installed on the support plate. A second gear is fixedly connected to the output shaft of the drive motor. The second gear meshes with the first gear. A wavy guide groove is provided on the outer wall of the air blowing pipe. Horizontal protrusions are provided at both ends of the top of the support guide frame and extend into the guide groove.

6. The method of using the pressure-reducing soot blower for a thermal power plant boiler according to claim 5, characterized in that, Includes the following steps: S1, extend one end of the air blowing pipe into the boiler, start the soot blower body to supply air to the air blowing pipe, and perform soot blowing work on the boiler through the air outlet and the air outlet of the air blowing pipe. S2, start the drive motor, drive the second gear and the first gear to drive the air blowing pipe to rotate. Under the action of the guide groove and the support guide frame, the air blowing pipe moves back and forth while rotating, so as to blow away ash without dead angles. S3, during the movement of the air blowing assembly, under the action of the connecting rod, the support plate and the drive motor are pulled to move synchronously along the guide rod, ensuring that the first gear and the second gear are always meshed, and ensuring the stable operation of the soot blower.

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