Sootblower and sootblowing system

Abstract

The present invention discloses a sootblower and a sootblower system. The sootblower comprises an air duct, a chassis and a vortex structure. The vortex structure cover is arranged on the chassis to form a cavity. One end of the air duct passes through the chassis and is located in the cavity. A plurality of sootblowing holes connected to the cavity are evenly arranged on the vortex structure. The airflow enters the airflow cover and flows back down and is ejected from the jet holes below. At this time, the compressed air sucks the dust out from the sootblowing holes, continuously sweeping the dust in the sootblower, thereby achieving the purpose of self-cleaning the dust accumulation inside the sootblower, and effectively avoiding the problem of dust entering the sootblower and causing blockage. The sootblowing system has good cleaning effect and high working efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of boiler sootblowing, in particular to a sootblower and a sootblowing system. Background Art

[0002] There has been no better solution to the ash accumulation at the flame corner of the power plant boiler. If the ash accumulation at the flame corner is serious, the high-pass and high-resuspended pipes will be buried in the ash, causing high-temperature ash corrosion, and corrosion pits will form on the pipe walls at the lower ends of the high-pass and high-resuspended pipes, resulting in thinning of the pipe walls. Pipes must be inspected and replaced regularly, which will increase the cost of equipment maintenance. At the same time, in extreme cases, when the ash thickness reaches a certain level, the ash will suddenly flow back into the furnace like an avalanche under the disturbance of the flue gas, which may cause the boiler fire extinguishing protection action to start, causing a sudden shutdown accident. Therefore, it is imperative to clean the boiler flame corner, but because the flue gas temperature at the boiler flame corner is relatively high, the sootblowing equipment material needs to have higher high temperature resistance and corrosion resistance requirements, resulting in a relatively high cost of sootblowing equipment. How to arrange the sootblower economically, reasonably and safely needs to be considered comprehensively.

[0003] During the use of the existing boiler soot blower, dust in the boiler easily enters the soot blower through the spray hole and causes blockage, thereby affecting the cleaning effect of the soot blower. Summary of the invention

[0004] The object of the present invention is to provide a soot blower to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A soot blower comprises an air duct, a chassis and a vortex structure. The vortex structure cover is arranged on the chassis to form a cavity. One end of the air duct passes through the chassis and is located in the cavity. A plurality of soot blowing holes connected to the cavity are evenly arranged on the vortex structure.

[0007] Preferably, the cavity comprises a large cavity and a small cavity which are connected, the soot blowing hole is connected to the small cavity, and the air guide pipe is connected to the large cavity.

[0008] Preferably, a plurality of jet holes are evenly arranged circumferentially on the tube wall of the air guide tube located at one end of the cavity, and each of the jet holes is connected to the large cavity.

[0009] Preferably, the vortex structure comprises an airflow cover and a sootblowing hole plate, the sootblowing holes are opened on the sootblowing hole plate, the sootblowing hole plate cover is arranged on the base plate to form the small cavity, and the airflow cover is arranged on the sootblowing hole plate to form the large cavity.

[0010] Preferably, the soot blowing hole disc is disc-shaped, and the soot blowing holes are evenly arranged along the circumferential direction.

[0011] Preferably, the sootblowing hole disc is provided with a groove which cooperates with the airflow cover to cover the sootblowing hole disc.

[0012] Preferably, the airflow hood is a spatial shape formed by rotating a trapezoid around the long bottom side as the axis.

[0013] Preferably, in the blowing direction of the air duct, the airflow hood is provided with a buffer cavity connected to the large cavity.

[0014] Preferably, the soot blowing holes are Laval nozzle holes, and the number thereof is 4, 6 or 8.

[0015] Preferably, the chassis, lower air guide pipe, soot blowing hole plate, air flow cover and buffer chamber are all made of high-temperature alloy materials.

[0016] The present invention also discloses a sootblowing system, comprising a high-pressure driving air source, an air supply main pipe, a control device, and the sootblower described in Example 1, wherein the control device issues instructions to control the high-pressure driving air source to generate an airflow, and the airflow passes through the air supply main pipe and enters the sootblower.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The soot blower is provided with a layer of soot blowing holes, and soot blowing jets are ejected in multiple directions with compressed air. The compressed air with a certain pressure and flow rate rolls up the accumulated ash, destroys the original sedimentation equilibrium state of the accumulated ash, and forces the accumulated ash to become a turbulent state and flow away with the flow of flue gas, thereby achieving the purpose of removing the accumulated ash.

[0019] 2) The soot blower is provided with an airflow hood, and the airflow enters the airflow hood and flows back down to be ejected from the jet holes below. At this time, the compressed air sucks the dust out from the soot blowing holes, and continuously cleans the dust in the soot blower, thereby achieving the purpose of self-cleaning the dust accumulated inside the soot blower, and can effectively avoid the problem of dust entering the soot blower and causing blockage.

[0020] 3) The soot blowing system has good cleaning effect and high working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 and Figure 2 The figure is a schematic diagram of the structure of the soot blower according to the first embodiment of the present invention.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1 chassis, 2 air guide pipe, 3 soot blowing hole plate, 4 air flow cover, 5 buffer cavity, 6 jet hole, 7 soot blowing hole, 81 large cavity, 82 small cavity. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1

[0027] See also Figures 1-2 A sootblower comprises an air duct 2, a chassis 1 and a vortex structure, wherein the vortex structure cover is arranged on the chassis 1 to form a cavity, one end of the air duct 2 passes through the chassis 1 and is located in the cavity, and a plurality of sootblowing holes 7 connected to the cavity are evenly arranged on the vortex structure. The sootblowing holes 7 are Laval nozzle holes, and the number is 4 to 8. The airflow is ejected through the air duct 2, enters the vortex structure, passes through the sootblowing holes, and is ejected in multiple directions as compressed air, forming compressed air with a certain pressure and flow rate to roll up the accumulated soot.

[0028] The cavity includes a large cavity 81 and a small cavity 82 connected to each other, the soot blowing hole 7 is connected to the small cavity 82, and the pipe opening of the air guide pipe 2 is connected to the large cavity 81. When the airflow enters the small cavity 82 from the large cavity 81, the speed of the airflow increases.

[0029] At least one group of jet holes 6 are evenly arranged on the wall of the air guide pipe 2 at one end of the cavity, and each jet hole 6 is connected to the large cavity 81. The airflow is ejected through the air guide pipe 2, enters the vortex structure, flows back down and ejects from the jet holes 6, and the airflow is compressed and ejected from the soot blowing holes 7 to suck dust and continuously clean the dust in the soot blower, thereby achieving the purpose of self-cleaning the dust accumulated inside the soot blower.

[0030] The vortex structure includes an airflow cover 4 and a sootblowing hole plate 3, the sootblowing holes 7 are opened on the sootblowing hole plate 3, the sootblowing hole plate 3 is covered on the base plate 1 to form the small cavity 82, and the airflow cover 4 is covered on the sootblowing hole plate 3 to form the large cavity 81.

[0031] The soot blowing hole disc 3 is disc-shaped, and the soot blowing holes 7 are evenly arranged along the circumferential direction.

[0032] The sootblowing hole plate 3 is provided with a groove for cooperating with the airflow cover 4 to cover the sootblowing hole plate 3 , and the groove is provided to facilitate the covering of the airflow cover 4 .

[0033] The airflow cover 4 is a space shape formed by rotating a circle with the long bottom side as the axis. In the airflow direction of the air duct 2, the airflow cover 4 is provided with a buffer cavity 5 connected to the large cavity 81, and the airflow enters the buffer cavity 5 and flows back down and is ejected from the jet hole 6.

[0034] The chassis 1, the air guide pipe 2, the soot blowing hole plate 3, the air flow cover 4 and the buffer chamber 5 are all made of high-temperature alloy materials.

[0035] The soot blower is provided with a layer of soot blowing holes, and soot blowing jets are ejected in multiple directions with compressed air. The compressed air with a certain pressure and flow rate rolls up the accumulated ash, destroys the original sedimentation equilibrium state of the accumulated ash, and forces the accumulated ash to become a turbulent state and flow away with the flow of flue gas, thereby achieving the purpose of removing the accumulated ash.

[0036] At the same time, when in use, the airflow enters the airflow cover 4 through the pipe mouth of the air guide pipe 2, and flows back through the buffer chamber 5 and is ejected from the jet hole 6. At this time, the compressed air sucks the dust and is ejected from the soot blowing hole 7, continuously cleaning the dust in the soot blower, thereby achieving the purpose of self-cleaning the dust accumulated inside the soot blower.

[0037] Embodiment 2

[0038] A sootblowing system comprises a high-pressure driving air source, an air supply main pipe, a control device, and the sootblower described in Example 1, wherein the control device issues instructions to control the high-pressure driving air source to generate an airflow, and the airflow passes through the air supply main pipe and enters the sootblower to perform sootblowing. The control device may be an industrial computer.

[0039] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A soot blower, characterized in that: It comprises an air guide pipe, a chassis and a vortex structure, wherein the vortex structure cover is arranged on the chassis to form a cavity, one end of the air guide pipe passes through the chassis and is located in the cavity, and a plurality of soot blowing holes connected to the cavity are evenly arranged on the vortex structure; The cavity comprises a large cavity and a small cavity connected to each other, the soot blowing hole is connected to the small cavity, and the air guide pipe is connected to the large cavity; The vortex structure comprises an airflow cover and a sootblowing hole plate, the sootblowing holes are opened on the sootblowing hole plate, the sootblowing hole plate cover is arranged on the bottom plate to form the small cavity, and the airflow cover is arranged on the sootblowing hole plate to form the large cavity; The soot blowing holes are Laval nozzle holes.

2. The sootblower according to claim 1, characterized in that: A plurality of jet holes are evenly arranged circumferentially on the tube wall of the air guide tube located at one end of the cavity, and each of the jet holes is connected to the large cavity.

3. The sootblower according to claim 1, characterized in that: The soot blowing hole disc is in a disc shape, and the soot blowing holes are evenly arranged along the circumferential direction.

4. The sootblower according to claim 3, characterized in that: The soot blowing hole plate is provided with a groove which cooperates with the air flow cover to cover the soot blowing hole plate.

5. The sootblower according to claim 1, characterized in that: The airflow hood is a space shape formed by rotating a trapezoid around the long bottom side as an axis.

6. The sootblower according to claim 5, characterized in that: In the airflow direction of the air duct, the airflow cover is provided with a buffer cavity connected to the large cavity.

7. A sootblowing system, comprising a high-pressure driving air source, an air supply main pipe and a control device, characterized in that: It also includes a soot blower as described in any one of claims 1 to 6.

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