Sootblower and sootblowing system

Abstract

The present invention discloses a sootblower and a sootblowing system. The sootblower includes a lower sootblowing part and an air duct connected to the lower sootblowing part, and also includes an upper sootblowing part connected to the air duct, the upper sootblowing part includes an upper air inlet, an upper air outlet, an arc-shaped resonance cavity connected to the upper air inlet and the upper air outlet, and a sonicator arranged at the upper air inlet, and the arc-shaped resonance cavity is connected to the lower sootblower. The sootblower sprays sootblowing jets with compressed air in multiple directions, and 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. The sootblowing system includes a high-pressure driving air source, an air supply main pipe and a control device, and is characterized in that it also includes the sootblower.

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 material of the sootblowing equipment has higher requirements for high temperature resistance and corrosion resistance, resulting in a relatively high cost of the sootblowing equipment. How to arrange the sootblower economically, reasonably and safely needs to be considered comprehensively. Summary of the invention

[0003] The object of the present invention is to provide a sootblower to solve the problems mentioned in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A sootblower comprises a lower sootblowing part and an air passage connected to the lower sootblowing part, and also comprises an upper sootblowing part connected to the air passage. The upper sootblowing part comprises an upper air inlet, an upper air outlet, an arc-shaped resonance cavity connected to the upper air inlet and the upper air outlet, and a sonicator arranged at the upper air inlet, wherein the arc-shaped resonance cavity is connected to the lower sootblower.

[0006] Preferably, the lower sootblower comprises a lower air inlet, a lower air outlet, and a Laval spray hole connecting the lower air inlet and the lower air outlet, the air duct is connected to the lower air inlet, and the arc-shaped resonance cavity is connected to the Laval spray hole.

[0007] Preferably, the lower soot blowing section is evenly provided with 4 to 8 lower air outlets.

[0008] Preferably, the cross-sectional size of the lower air outlet is 5×5 to 10×10 mm.

[0009] Preferably, the upper soot blowing portion is evenly provided with two upper air outlets.

[0010] Preferably, the upper soot blower and the lower soot blower are stacked.

[0011] Preferably, it further comprises a chassis, and the lower sootblower is arranged on the chassis.

[0012] Also disclosed is a sootblowing system, comprising a high-pressure driving air source, an air supply main pipe and a control device, and characterized in that it also comprises the sootblower.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The soot blower is provided with Laval nozzles to spray soot blowing jets with compressed air in multiple directions. 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.

[0015] The soot blower is configured such that the upper soot blowing part is driven by compressed air to emit oscillating sound waves of a certain frequency. The upper soot blowing part is accompanied by a rotating airflow while emitting the sound waves. On the one hand, the soot oscillation loosens the accumulated ash, and on the other hand, the accumulated ash is loosened by the flushing of the rotating airflow to form a vortex and is carried away by the flue gas.

[0016] The present invention fully considers various situations of the soot blower under operating conditions and can completely achieve the purpose of thoroughly cleaning the soot accumulated at the flame folding corner.

[0017] The sootblowing system is efficient and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 This is a schematic structural diagram of a soot blower according to Embodiment 1 of the present invention;

[0020] Figure 2 for Figure 1 A cross-sectional view of an upper sootblowing portion;

[0021] Figure 3 for Figure 1 Cross-sectional view of the lower sootblowing section.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1 chassis, 2 lower soot blowing part, 3 upper soot blowing part, 4 Laval nozzle, 5 arc-shaped resonance cavity, 6 airway, 7 lower air outlet, 8 upper air outlet, 9 sonicator. DETAILED DESCRIPTION

[0024] 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.

[0025] The present invention provides a technical solution:

[0026] Embodiment 1

[0027] See also Figures 1 to 3 A sootblower comprises a lower sootblowing part 2 and an air passage 6 connected to the lower sootblowing part 2, and also comprises an upper sootblowing part 3 connected to the air passage 6, wherein the upper sootblowing part 3 and the lower sootblowing part 3 are stacked.

[0028] The upper soot blowing part 3 comprises an upper air inlet, an upper air outlet 8, an arc-shaped resonance cavity 5 connecting the upper air inlet and the upper air outlet 8, and a sonicator 9 arranged at the upper air inlet, wherein the arc-shaped resonance cavity 5 connects the lower soot blowing part 3. The upper soot blowing part 2 is disc-shaped, and two upper air outlets 8 are evenly arranged in the circumferential direction.

[0029] The lower soot blowing part 2 includes a lower air inlet, a lower air outlet 7, and a Laval nozzle connecting the lower air inlet and the lower air outlet 7, the air duct 6 connects the lower air inlet, and the arc-shaped resonance cavity 5 connects the Laval nozzle. The lower soot blowing part 2 is disc-shaped, and 4 to 8 lower air outlets 7 are evenly arranged in the circumferential direction. In this embodiment, the cross-sectional size of the lower air outlet 7 is 5×5 to 10×10 mm. The upper blowing part 3 and the lower soot blowing part 2 are arranged in a concentric circle shape, and the air duct 6 is arranged at the center of the circle.

[0030] The sootblower is also provided with a chassis 1, and the lower sootblowing part 2 is provided on the chassis 1 for easy installation. The sootblower may also be provided without the chassis, and a mounting part, such as a mounting hole, is provided on the lower sootblowing part 2 for fixed installation.

[0031] The soot blower is integrally formed and made of alloy material, and has the characteristics of high temperature resistance and corrosion resistance.

[0032] When the soot blower is working, the lower soot blowing part 2 is provided with a plurality of Laval nozzles, which spray soot blowing jets in multiple directions with compressed air. The compressed air with a certain pressure and flow rate rolls up the accumulated soot, destroys the original sedimentation equilibrium state of the accumulated soot, and forces the accumulated soot to become a turbulent state and flow away with the flow of flue gas, thereby achieving the purpose of removing the accumulated soot. The upper soot blowing part 3 is driven by compressed air to emit an oscillating sound wave of a certain frequency. The upper soot blowing part 3 has a rotating airflow while emitting the sound wave. On the one hand, the accumulated soot is loosened by the oscillation of the sound wave, and on the other hand, the accumulated soot is loosened by the flushing of the rotating airflow to form a vortex and is carried away by the flue gas.

[0033] Embodiment 2

[0034] 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.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] 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 includes a lower soot blowing part and an air duct connected to the lower soot blowing part, and also includes an upper soot blowing part connected to the air duct, the upper soot blowing part includes an upper air inlet, an upper air outlet, an arcuate resonance cavity connected to the upper air inlet and the upper air outlet, and a sonicator arranged at the upper air inlet, the arcuate resonance cavity connected to the lower soot blowing part; the lower soot blowing part includes a lower air inlet, a lower air outlet, and a Laval nozzle connected to the lower air inlet and the lower air outlet, the air duct is connected to the lower air inlet, and the arcuate resonance cavity is connected to the Laval nozzle; The upper sootblowing part and the lower sootblowing part are stacked.

2. The sootblower according to claim 1, characterized in that: The lower soot blowing part is evenly provided with 4 to 8 lower air outlets.

3. The sootblower according to claim 2, characterized in that: The cross-sectional dimensions of the lower air outlet are 5×5 to 10×10 mm.

4. The sootblower according to claim 1, characterized in that: The upper soot blowing part is evenly provided with two upper air outlets.

5. The sootblower according to claim 1, characterized in that: The upper soot blowing part and the lower soot blowing part are both disc-shaped and arranged in concentric circle shapes.

6. The sootblower according to claim 1, characterized in that: It also includes a base plate, and the lower sootblowing part is arranged on the base plate.

7. The sootblower according to claim 1 or 6, characterized in that: The soot blower is integrally formed.

8. 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 7.

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