A resonant jet dual-energy acoustic sootblower for a boiler tangent angle

Abstract

The utility model discloses a kind of resonance jet dual-energy acoustic wave soot blower for boiler baffle angle, including Hartmann whistle;Injection cavity shell is coaxially arranged at the tail end of the outer wall of Hartmann whistle, and injection cavity is formed between the inside of injection cavity shell and Hartmann whistle;Connecting column is coaxially arranged at the tail end of Hartmann whistle, and extend through the tail end of injection cavity shell, and there is gap between the connecting column and injection cavity shell;Annular resonant cover is coaxially sleeved on connecting column, and is installed together with the tail end of connecting column, and annular resonance cavity is formed in its inside, and its inner wall front end is formed with the jet channel that gradually shrinks to its tail end direction;Diffuser is arranged at the tail end of annular resonant cover in the form of horn.The utility model forms dual-energy coordination effect by kinetic energy of jet and vibration energy provided by resonance acoustic wave, realizes the dual-energy effect of impact and vibration, improves soot blowing efficiency, and jet and resonance share same power source, reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of soot blowing equipment technology, specifically a resonant jet dual-energy acoustic soot blower for boiler flame deflection angle. Background Technology

[0002] When the flue gas from the lower part of the boiler's flame deflector enters the upper part of the horizontal flue, the reduced flue gas velocity and backflow cause most of the fly ash to accumulate on the slope of the flame deflector. Ash accumulation on the slope of the flame deflector affects heat exchange efficiency. Frequent ash collapse in the boiler leads to negative pressure in the furnace, seriously affecting the safe operation of the unit. Traditional steam sootblowers have a small blowing range, high energy consumption, and are incomplete in cleaning stubborn ash deposits, easily damaging heat exchange surfaces. Some acoustic sootblowers can only be installed on the furnace wall, have a single energy source, incomplete blowing within the furnace, and low acoustic power, resulting in poor penetration of thick ash layers and low cleaning efficiency. Therefore, we designed a resonant cavity acoustic wave and jet dual-energy acoustic sootblower to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to overcome or at least partially solve the above problems by proposing a resonant jet dual-energy acoustic soot blower for boiler flame deflector angle.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a resonant jet dual-energy acoustic sootblower for boiler flame deflector angle, comprising:

[0005] Hartmann whistle, as a hydrodynamic acoustic structure;

[0006] The injection chamber housing is coaxially disposed at the tail end of the outer wall of the Hartmann whistle, and the interior of the injection chamber housing and the Hartmann whistle form an injection chamber, which is in communication with the Hartmann whistle.

[0007] A connecting post is coaxially disposed at the tail end of the Hartmann whistle and extends through the tail end of the injection chamber housing, and there is a gap between the connecting post and the injection chamber housing;

[0008] An annular resonant cover is coaxially sleeved on the connecting column and installed together with the tail end of the connecting column. An annular resonant cavity is formed inside it, and a jet channel that gradually narrows towards the tail end is formed on the front end of its inner wall.

[0009] The diffuser, in a trumpet shape, is located at the rear end of the annular resonant shield and extends towards the Hartmann whistle, covering the rear end of the jet chamber housing.

[0010] In a preferred embodiment, the outer wall of the Hartmann whistle has multiple through holes at its tail end.

[0011] In a preferred embodiment, the inner wall of the annular resonant cover is provided with a flow guiding structure.

[0012] In a preferred embodiment, the flow guiding structure is a spiral pattern or a raised array.

[0013] In a preferred embodiment, the flare angle of the diffuser 5 gradually changes from 40° at the connection end to 90° at the outlet end.

[0014] In a preferred embodiment, there is a gap between the tail end of the jet chamber housing and the front end of the annular resonant shield.

[0015] Compared with existing technologies, this utility model provides a resonant jet dual-energy acoustic sootblower for boiler flame deflector angle. By coupling the jet channel with the annular resonant cavity and the shape of the diffuser, the sootblowing range is greatly increased and the acoustic power is significantly improved. The kinetic energy of the jet and the vibration energy provided by the resonant acoustic wave form a dual-energy coordinated effect, realizing the dual-energy effect of impact and vibration. Compared with single jet or single resonant cavity acoustic sootblowers, it greatly improves the soot removal efficiency. At the same time, the jet and resonance share the same power source, reducing energy consumption, extending the boiler operating cycle, and achieving the economic effect of energy saving and consumption reduction. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the gas flow direction of this utility model.

[0019] In the diagram: 1. Hartmann whistle; 2. Jet chamber housing; 3. Connecting column; 4. Annular resonant cover; 5. Diffuser; 6. Through hole; 7. Jet chamber; 8. Jet channel; 9. Annular resonant cavity. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this description, those skilled in the art can make creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0022] This utility model discloses a resonant jet dual-energy acoustic sootblower for boiler flame deflector angle, which solves the technical problems in the prior art. The overall concept is as follows:

[0023] Example 1:

[0024] Please see Figures 1-3A resonant jet dual-energy acoustic sootblower for boiler flame deflector angle, comprising:

[0025] Hartmann whistle 1, fixed to the side wall of the boiler, is connected to the compressed air main pipe in the plant (pressure 0.6-0.8MPa). As a hydrodynamic acoustic structure, multiple through holes 6 are opened on the circumference of the outer wall of Hartmann whistle 1.

[0026] The jet chamber housing 2 is coaxially welded to the outer end of the Hartmann whistle 1. The interior of the jet chamber housing 2 and the Hartmann whistle 1 form a jet chamber 7. The jet chamber 7 is interconnected with the Hartmann whistle 1 through the through hole 6.

[0027] The connecting post 3 is coaxially disposed at the tail end of the Hartmann whistle 1 and extends through the tail end of the injection chamber housing 2, and there is a gap between the connecting post 3 and the injection chamber housing 2.

[0028] The annular resonant cover 4 is coaxially sleeved on the connecting column 3 and installed together with the tail end of the connecting column 3. An annular resonant cavity 9 is formed inside it, and a jet channel 8 that gradually narrows towards its tail end is formed on the front end of its inner wall. There is a gap between the tail end of the jet chamber shell 2 and the front end of the annular resonant cover 4. The jet channel 8 and the annular resonant cavity 9 reduce the energy consumption of the compressed air system and extend the boiler operating cycle by matching the airflow parameters (flow rate and pressure).

[0029] The diffuser 5 is welded to the tail end of the annular resonant cover 4 in a trumpet shape and extends towards the Hartmann whistle 1 to cover the tail end of the jet chamber housing 2.

[0030] In practice, the inner wall of the annular resonant cover 4 is provided with a flow guiding structure, such as a spiral pattern or a raised array (the spiral pattern spacing is 6mm and the raised height is 3mm), to enhance the airflow oscillation effect and increase the sound wave power.

[0031] In practice, the diffuser 5 is designed with a horn-shaped angle that gradually changes from 40° at the connection end to 90° at the outlet end, expanding the soot blowing range and radiating the dual-energy effect to the boiler heating surface without damaging it.

[0032] In this invention, the jet and the resonance share the same compressed air system. The vibration energy of the resonant sound wave generated by the high-speed airflow oscillating in the annular resonant cavity is combined with the kinetic energy of the jet (dual energy effect), and then diffused and radiated to the furnace through the diffuser to achieve efficient soot blowing.

[0033] The core advantages of this invention are dual-energy synergy, full furnace coverage, low power consumption, and high adaptability. Dual-energy synergy integrates acoustic vibration energy (initial sound waves generated by the Hartmann whistle) and jet kinetic energy (enhanced by the high-speed airflow jet chamber and jet channel), achieving dual-effect soot removal with "sound waves + jet," significantly improving penetration into thick ash layers (≥5mm). Full furnace coverage utilizes a ring-shaped resonant cavity inner wall guiding structure (spiral pattern, raised array) to enhance airflow oscillation, combined with a diffuser's wide-range radiation design, ensuring the soot blowing range covers the entire heating surface of the boiler (furnace, superheater, economizer, etc.) without dead zones. Low power consumption and high adaptability allow direct connection to compressed air systems, eliminating the need for an additional power source. It is compatible with existing boiler soot blowing system interfaces, requiring minimal modification work. Suitable for power plant boilers, industrial boilers, and other scenarios, it improves soot blowing efficiency through dual-energy radiation technology, achieving a maximum sound pressure level of 165dB.

[0034] This invention requires commissioning after installation. Compressed air is started, and the airflow velocity at the jet channel is checked (≥150m / s) to verify the jet kinetic energy. The sound wave frequency (100-2000Hz, covering the boiler ash vibration frequency range) is measured using a sound level meter (1m away from the device). Resonance verification is performed by adjusting the parameters of the annular resonant cavity guide structure (such as spiral density) to match the internal gas resonance frequency with the natural frequency of boiler ash (monitored using spectrum analysis software) to ensure maximum ash removal efficiency. Linkage commissioning is then performed, integrating with the boiler DCS system. The soot blowing cycle is set (running once every 4 hours, 30 seconds each time) to simulate the soot blowing effect under different loads (50%-100% BMCR) and optimize operating parameters.

[0035] The above description of the embodiments is provided to facilitate understanding and use of the present invention by those skilled in the art. It is obvious to those skilled in the art that various modifications can be made to the embodiments, and the general principles described herein can be applied to other embodiments without creative effort. Therefore, the present invention is not limited to the above embodiments. Any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A resonant jet dual-energy acoustic sootblower for boiler flame deflector angle, characterized in that, Including: Hartmann whistle (1), as a hydrodynamic acoustic structure; The injection chamber housing (2) is coaxially disposed at the tail end of the outer wall of the Hartmann whistle (1). The interior of the injection chamber housing (2) and the Hartmann whistle (1) form an injection chamber (7), and the injection chamber (7) and the Hartmann whistle (1) are interconnected. A connecting post (3) is coaxially disposed at the tail end of the Hartmann whistle (1) and extends through the tail end of the injection chamber housing (2), and there is a gap between the connecting post (3) and the injection chamber housing (2); The annular resonant cover (4) is coaxially sleeved on the connecting column (3) and installed together with the tail end of the connecting column (3). An annular resonant cavity (9) is formed inside it, and a jet channel (8) that gradually narrows towards its tail end is formed at the front end of its inner wall. The diffuser (5) is horn-shaped and located at the tail end of the annular resonant shield (4), and extends towards the Hartmann whistle (1) to cover the tail end of the jet chamber housing (2).

2. The resonant jet dual-energy acoustic sootblower for boiler flame deflector angle according to claim 1, characterized in that: The outer wall of the Hartmann whistle (1) has multiple through holes (6) at the tail end.

3. The resonant jet dual-energy acoustic sootblower for boiler flame deflector angle according to claim 1, characterized in that: The inner wall of the annular resonant cover (4) is provided with a flow guiding structure.

4. A resonant jet dual-energy acoustic sootblower for boiler flame deflector angle according to claim 3, characterized in that: The flow guiding structure is a spiral pattern or a raised array.

5. A resonant jet dual-energy acoustic sootblower for boiler flame deflector angle according to claim 1, characterized in that: The flare angle of the diffuser (5) gradually changes from 40° at the connection end to 90° at the outlet end.

6. A resonant jet dual-energy acoustic sootblower for boiler flame deflector angle according to claim 1, characterized in that: There is a gap between the tail end of the jet chamber housing (2) and the front end of the annular resonant cover (4).

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