Continuous supersonic airflow jet soot blower

Abstract

The present invention provides a continuous supersonic airflow jet soot blower. The continuous supersonic airflow jet soot blower comprises mixers, an ignition assembly, a shock wave tank, and a jet assembly. Each mixer is provided with an air inlet and a gas inlet; the air inlet is used for introducing air into the mixer; and the gas inlet is used for introducing combustible gas into the mixer. The ignition assembly comprises an ignition chamber and an igniter; the ignition chamber is connected to the mixers; the igniter is disposed in the ignition chamber for igniting a mixed gas in the ignition chamber; and the shock wave tank is connected to the ignition chamber for storing gas discharged from the ignition chamber. The jet assembly comprises a jet pipe; one end of the jet pipe is connected to the shock wave tank; and the other end of the jet pipe is disposed in an air preheater. The continuous supersonic airflow jet soot blower of the present invention has the advantages of low energy consumption and excellent cleaning effect.

Description

A continuous supersonic airflow jet soot blower Technical Field

[0001] This invention relates to the field of sootblower technology, and more specifically, to a continuous supersonic airflow jet sootblower. Background Technology

[0002] To maintain the efficient operation of the air preheater, regular cleaning and soot blowing are essential. Traditional soot blowing methods, such as compressed air jetting, steam jetting, and mechanical vibration, often suffer from problems such as low soot blowing efficiency, high energy consumption, and incomplete cleaning. Especially when dealing with long pipelines, complex structures, or highly viscous dust, traditional soot blowing methods often fail to achieve the desired cleaning effect. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art. To this end, embodiments of the present invention propose a continuous supersonic airflow jet soot blower, which has the advantages of low energy consumption and good cleaning effect.

[0004] The continuous supersonic airflow jet soot blower of this invention includes:

[0005] A mixer having an air inlet and a gas inlet, the air inlet being used to introduce air into the mixer and the gas inlet being used to introduce combustible gas into the mixer;

[0006] An ignition assembly, comprising an ignition chamber and an igniter, wherein the ignition chamber is connected to the mixer and the igniter is disposed within the ignition chamber for igniting the mixed gas within the ignition chamber;

[0007] A shock tank, which is connected to the ignition chamber, is used to store the gas discharged from the ignition chamber;

[0008] The injection assembly includes an injection tube, one end of which is connected to the shock tank, and the other end of which is placed inside the air preheater.

[0009] The continuous supersonic airflow jet soot blower of this invention can effectively remove ash accumulation on the air preheater through the rapid expansion of gas in the shock tank and the high-pressure jetting of the jetting components, thereby improving soot blowing efficiency.

[0010] In some embodiments, the injection pipe includes a first section, a second section, a third section, and an injection section connected in sequence, wherein the diameter of the first section gradually decreases in the direction from the first section to the second section, and the diameter of the third section gradually increases in the direction from the second section to the third section.

[0011] In some embodiments, the injection section has a plurality of injection ports arranged at circumferential intervals along the injection section.

[0012] In some embodiments, the continuous supersonic airflow jet soot blower of the present invention further includes a plurality of jet nozzle groups, the plurality of jet nozzle groups being arranged at intervals along the length direction of the jet tube, and one jet nozzle group including a plurality of jet nozzles.

[0013] In some embodiments, the injection segment is rotatable circumferentially relative to the injection tube about the axial direction of the injection tube.

[0014] In some embodiments, the spraying assembly further includes a spraying drive member connected to the third segment, and the driving portion of the spraying drive member is connected to the spraying segment for driving the spraying segment to rotate.

[0015] In some embodiments, the continuous supersonic airflow jet soot blower of the present invention further includes a detection component. Both the air inlet and the gas inlet are provided with control valves. The detection component includes a first detection element, which is connected to the first segment to detect the gas flow rate in the first segment. The first detection element is electrically connected to the control valve so that the control valve adjusts its opening degree according to the detection data of the first detection element.

[0016] In some embodiments, the detection assembly further includes a second detection element connected to the third segment for detecting the gas flow rate within the first segment. The second detection element is electrically connected to the control valve so that the control valve adjusts its opening degree based on the detection data from the second detection element.

[0017] In some embodiments, the continuous supersonic airflow jet soot blower of the present invention further includes a moving component, the moving component including a fixed base, a moving base and a moving drive, the moving base connecting the jet component and the fixed base, and the moving drive connected to the moving base for driving the moving base to move on the fixed base.

[0018] In some embodiments, there are multiple mixers, and at least one of the multiple mixers introduces a mixed gas into the ignition chamber. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the structure of a continuous supersonic airflow jet soot blower according to an embodiment of the present invention.

[0020] Figure 2 is a partial structural schematic diagram of a continuous supersonic airflow jet soot blower according to an embodiment of the present invention.

[0021] Figure label:

[0022] 1. Mixer; 11. Air inlet; 12. Gas inlet.

[0023] 2. Ignition assembly; 21. Ignition chamber; 22. Ignition device.

[0024] 3. Shock tank

[0025] 4. Injection assembly; 41. Injection pipe; 411. First section; 412. Second section; 413. Third section; 414. Injection section; 415. Injection nozzle; 416. Injection drive component.

[0026] 51. First inspection piece; 52. Second inspection piece;

[0027] 6. Movable component; 61. Fixed base; 62. Movable base. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] As shown in Figures 1 and 2, the continuous supersonic airflow jet soot blower of this embodiment of the invention includes: a mixer 1, an ignition assembly 2, a shock tank 3, and a jet assembly 4.

[0030] The mixer 1 has an air inlet 11 and a gas inlet 12. The air inlet 11 is used to introduce air into the mixer 1, and the gas inlet 12 is used to introduce combustible gas into the mixer 1. The ignition assembly 2 includes an ignition chamber 21 and an igniter 22. The ignition chamber 21 is connected to the mixer 1, and the igniter 22 is placed inside the ignition chamber 21 to ignite the gas mixture inside the ignition chamber 21. The shock tank 3 is connected to the ignition chamber 21 to store the gas discharged from the ignition chamber 21. The injection assembly 4 includes an injection pipe 41. One end of the injection pipe 41 is connected to the shock tank 3, and the other end of the injection pipe 41 is placed inside the air preheater.

[0031] Specifically, as shown in Figures 1 and 2, the mixer 1 is connected to the ignition assembly 2 via pipes or other connectors. Air inlet 11 receives air from an external air source, and gas inlet 12 receives combustible gas (such as natural gas, acetylene, etc.). Air and gas are mixed within the mixer 1 to form a combustion-ready mixture. The ignition chamber 21 is connected to the mixer 1 via a pipe, and the igniter 22 is placed inside the ignition chamber 21. The shock tank 3 is connected to the ignition chamber 21 via a pipe and receives the gas discharged from the ignition chamber 21. The shock tank 3 stores and accelerates the gas discharged from the ignition chamber 21, causing it to expand rapidly and generate a shock wave. One end of the injection pipe 41 is connected to the shock tank 3, and the other end is placed inside the air preheater, pointing directly at the area to be cleaned (i.e., the interior of the air preheater). The injection pipe 41 injects high-pressure, high-speed gas from the shock tank 3 into the air preheater, using the impact force of the supersonic airflow to remove accumulated ash.

[0032] Understandably, the mixed gas generated by mixer 1 is transmitted to ignition chamber 21 through a pipe, and igniter 22 ignites the mixed gas, initiating the combustion process. The gas produced by combustion enters shock tank 3 through a pipe, where it stores gas and prepares to generate a shock wave. The gas in shock tank 3 is injected into air preheater through injection pipe 41, generating a strong shock wave that removes accumulated ash.

[0033] Preferably, there are multiple mixers 1, and at least one of the multiple mixers 1 introduces mixed gas into the ignition chamber 21. That is, the continuous supersonic airflow jet soot blower of this embodiment of the invention is equipped with more than one mixer 1, and each mixer 1 has its own independent air inlet 11 and gas inlet 12. Thus, through multiple mixers 1, mixed gas can be supplied to the ignition chamber 21 simultaneously or sequentially, thereby increasing the stability and efficiency of combustion. Multiple mixers 1 can control different proportions of air and gas, making the combustion process more precise and avoiding local overheating or incomplete combustion.

[0034] Preferably, the injection section 414 has a plurality of injection ports 415, which are arranged at circumferential intervals along the injection section 414.

[0035] In other words, the continuous supersonic airflow jet soot blower of this embodiment of the invention can effectively remove the ash accumulated on the air preheater through the rapid expansion of the gas in the shock tank 3 and the high-pressure jetting of the jetting component 4, thereby improving the soot blowing efficiency.

[0036] Therefore, the continuous supersonic airflow jet soot blower of this invention achieves efficient and safe soot blowing through continuous airflow jet, and is easy to operate and has low maintenance costs.

[0037] In some embodiments, the injection pipe 41 includes a first section 411, a second section 412, a third section 413 and an injection section 414 connected in sequence. The diameter of the first section 411 gradually decreases in the direction from the first section 411 to the second section 412, and the diameter of the third section 413 gradually increases in the direction from the second section 412 to the third section 413.

[0038] Specifically, as shown in Figures 1 and 2, the diameter of the first segment 411 gradually decreases from left to right, the diameter of the third segment 413 gradually increases from left to right, and the second segment 412 connects the first segment 411 and the third segment 413. The diameter of the second segment 412 is equal to the diameter of the right port of the first segment 411 and the left port of the third segment 413.

[0039] Understandably, the first section 411, the second section 412, and the third section 413 form a convergent-divergent conduit, meaning the airflow discharged from the shock tank 3 can achieve an acceleration effect after passing through it. In other words, in the convergent section (first section 411), as the channel cross-section gradually decreases, according to fluid mechanics principles, the gas velocity increases and the pressure decreases; this is a phenomenon described by the continuity equation and Bernoulli's equation. Conversely, when the gas flows from the second section 412 to the third section 413, it helps to reduce the airflow pressure to a certain level before the ejection section 414, preparing for the generation of a highly efficient shock wave in the ejection section 414. The formation of the shock wave enhances the impact force of the airflow on the accumulated dust.

[0040] Furthermore, when the fluid enters the jet pipe 41, the convergence-divergence degree of the jet pipe 41 is designed according to the gas flow rate, so that the fluid velocity can reach the speed of sound after passing through the first section 411, the second section 412, and the third section 413 in sequence. This enables continuous supersonic airflow jetting into the air preheater, ensuring a cleaning effect.

[0041] It should be noted that the shock tank 3 is a key component in the gas shock wave generator. Its main functions are energy storage and release. The shock tank 3 typically stores high-pressure gas, which generates high temperature and pressure by igniting the gas mixture in the combustion chamber. When a certain pressure is reached, it is rapidly released, generating a shock wave. The design of the shock tank 3 allows the gas to accumulate pressure inside the tank. When the pressure reaches a preset value, it is released instantaneously through the pressure relief structure, forming a high-pressure shock wave. When the high-pressure gas in the shock tank 3 is released instantaneously, a shock wave (or shock wave) is formed at the tank outlet. This shock wave has high energy and can be used for cleaning and descaling industrial equipment. The design parameters of the shock tank 3 (such as tank size, the size and distribution of pressure relief holes) can affect the shape and intensity of the generated shock wave, thereby controlling the cleaning effect.

[0042] Of course, the shock tank 3 can also reduce the impact on equipment and operators through its structural design. For example, the tank's buffering effect reduces the force of the shock wave on the surrounding environment and equipment. The shock tank 3 is usually equipped with safety valves and pressure relief systems to prevent overpressure and ensure the safe operation of the entire system.

[0043] In some embodiments, the continuous supersonic airflow jet soot blower of the present invention further includes a plurality of jet nozzles 415 groups, which are arranged at intervals along the length direction of the jet pipe 41 (the left-right direction in Figure 1), and one jet nozzle group 415 includes a plurality of jet nozzles 415.

[0044] As can be understood, as shown in Figures 1 and 2, multiple groups of nozzles 415 are arranged along the length of the injection pipe 41, and each group of nozzles 415 consists of multiple nozzles 415. There is a certain interval between the groups of nozzles 415 to ensure that each group of nozzles 415 can effectively cover different areas of the air preheater. The nozzles 415 within each group of nozzles 415 face the inner surface of the air preheater and are used to inject supersonic airflow.

[0045] In other words, the design of multiple nozzles (415 groups) ensures that the entire inner surface of the air preheater is covered by supersonic airflow, reducing dead zones for dust removal and improving cleaning efficiency.

[0046] In some embodiments, the injection section 414 is circumferentially rotatable relative to the injection tube 41 about its axial direction. As shown in Figures 1 and 2, the injection section 414 is located at the rightmost end of the injection tube 41 to inject supersonic airflow onto the inner surface of the air preheater. The injection section 414 can rotate circumferentially relative to the injection tube 41 about its axial direction, typically achieved by some kind of rotating mechanism (such as a motor drive).

[0047] Understandably, the rotatability of the injection section 414 allows the operator to adjust the injection direction to better accommodate different areas and shapes of the air preheater. By adjusting the position of the injection section 414, the impact angle of the supersonic airflow on the inner surface of the air preheater can be optimized, thereby improving the soot blowing effect.

[0048] Optionally, the spray assembly 4 further includes a spray drive 416, which is connected to the third segment 413, and the drive part of the spray drive 416 is connected to the spray segment 414 to drive the spray segment 414 to rotate.

[0049] It is understandable that the injection drive 416 can be a drive motor, and the output shaft of the drive motor is connected to the injection section 414 so as to drive the injection section 414 to rotate.

[0050] In some embodiments, the continuous supersonic airflow jet soot blower of the present invention further includes a detection component. Both the air inlet 11 and the gas inlet 12 are provided with control valves. The detection component includes a first detection element 51, which is connected to the first section 411 to detect the gas flow rate in the first section 411. The first detection element 51 is electrically connected to the control valve so that the control valve adjusts its opening and closing degree according to the detection data of the first detection element 51.

[0051] Specifically, as shown in Figures 1 and 2, the first detection element 51 is connected to the side wall of the first section 411, and the first detection element 51 is used to detect the gas flow rate within the first section 411. Control valves are located at the air inlet 11 and the gas inlet 12, and are used to regulate the flow rates of air and gas. The first detection element 51 is electrically connected to the control valve so that the valve opening degree can be automatically adjusted based on the detection data.

[0052] Understandably, the first detection element 51 can detect the gas flow rate within the first section 411 in real time and feed the detection data back to the control valve. The control valve automatically adjusts its opening and closing degree based on the detection data to ensure that the flow rate and pressure of the mixed gas remain at optimal levels. In other words, the electrical connection between the detection element and the control valve enables automatic adjustment without manual intervention, improving the automation level of the sootblower. Precise control of the flow rate and pressure of the mixed gas ensures more complete and stable combustion, improving combustion efficiency. Furthermore, automatic adjustment reduces fuel and air waste, lowering operating costs.

[0053] In some embodiments, the detection assembly further includes a second detection element 52, which is connected to the third segment 413 for detecting the gas flow rate in the first segment 411. The second detection element 52 is electrically connected to a control valve so that the control valve adjusts its opening degree according to the detection data of the second detection element 52.

[0054] Understandably, the second detection element 52 is used to detect the gas flow rate within the third section 413, and it is electrically connected to the control valve to automatically adjust the valve's opening and closing degree based on the detection data. In other words, the second detection element 52 provides different detection data than the first detection element 51; the first detection element 51 detects the flow rate of the gas discharged from the shock tank 3, while the second detection element 52 detects the flow rate of the gas after passing through the third section 413. This dual detection reduces errors and improves the accuracy of the detection results.

[0055] Furthermore, the addition of the second detection element 52 constitutes a redundant system. Even if one detection element fails, the other can still continue to provide data, ensuring that the sootblower can continue to operate normally. With both detection elements working simultaneously, the gas flow rate within the first section 411 can be monitored in real time, providing more timely data feedback to the control valves.

[0056] In some embodiments, the continuous supersonic airflow jet soot blower of the present invention further includes a moving component 6. The moving component 6 includes a fixed base 61, a moving base 62 and a moving drive. The moving base 62 is connected to the jetting component 4 and the fixed base 61. The moving drive is connected to the moving base 62 to drive the moving base 62 to move on the fixed base 61.

[0057] As can be understood, as shown in Figures 1 and 2, the fixed base 61 is connected to the movable base 62 as a fixed part of the movable component 6, and provides a fixed base for the movable base 62. The movable base 62 connects the spraying component 4 and the fixed base 61, and is movable relative to the fixed base 61. A moving drive is connected to the movable base 62 to drive the movable base 62 to move on the fixed base 61.

[0058] In other words, the moving component 6 can drive the spraying component 4 to move in the left and right direction, thereby enabling the cleaning of different areas of the air preheater. Furthermore, the design of the moving component 6 allows the sootblower to adapt to air preheaters of different sizes and shapes, and to perform cleaning operations in different locations. Thus, through the movement of the spraying component 4 by the moving component 6, the sootblower can more effectively cover all areas of the air preheater, improving cleaning efficiency and reducing dust accumulation in the air preheater.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0063] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A continuous supersonic gas stream jet sootblower characterized by, include: A mixer having an air inlet and a gas inlet, the air inlet being used to introduce air into the mixer and the gas inlet being used to introduce combustible gas into the mixer; An ignition assembly, comprising an ignition chamber and an igniter, wherein the ignition chamber is connected to the mixer and the igniter is disposed within the ignition chamber for igniting the mixed gas within the ignition chamber; A shock tank, which is connected to the ignition chamber, is used to store the gas discharged from the ignition chamber; The injection assembly includes an injection tube, one end of which is connected to the shock tank, and the other end of which is placed inside the air preheater.

2. The continuous supersonic gas stream jet sootblower according to claim 1, characterized in that The injection pipe includes a first section, a second section, a third section, and an injection section connected in sequence. The diameter of the first section gradually decreases in the direction from the first section to the second section, and the diameter of the third section gradually increases in the direction from the second section to the third section.

3. The continuous supersonic gas jet sootblower according to claim 2, characterized in that The spray section has multiple spray nozzles, which are arranged at circumferential intervals along the spray section.

4. The continuous supersonic gas jet sootblower according to claim 3, characterized in that It also includes multiple nozzle groups, which are arranged at intervals along the length of the injection pipe, and each nozzle group includes multiple nozzles.

5. The continuous supersonic gas jet sootblower according to claim 4, characterized in that The injection section is circumferentially rotatable relative to the injection pipe about its axial direction.

6. The continuous supersonic gas jet sootblower according to claim 5, characterized in that The spraying assembly further includes a spraying drive, which is connected to the third segment, and the driving part of the spraying drive is connected to the spraying segment to drive the spraying segment to rotate.

7. The continuous supersonic gas jet sootblower according to claim 2, characterized in that It also includes a detection component, wherein both the air inlet and the gas inlet are equipped with control valves. The detection component includes a first detection element, which is connected to the first segment to detect the gas flow rate within the first segment. The first detection element is electrically connected to the control valve so that the control valve adjusts its opening and closing degree according to the detection data of the first detection element.

8. The continuous supersonic gas jet sootblower according to claim 7, characterized in that The detection assembly further includes a second detection element, which is connected to the third segment to detect the gas flow rate in the first segment. The second detection element is electrically connected to the control valve so that the control valve adjusts its opening degree according to the detection data of the second detection element.

9. The continuous supersonic gas jet sootblower according to any one of claims 1 - 8, characterized in that It also includes a moving component, which includes a fixed base, a moving base, and a moving drive. The moving base connects the spraying assembly and the fixed base, and the moving drive is connected to the moving base to drive the moving base to move on the fixed base.

10. The continuous supersonic gas jet sootblower according to claim 9, characterized in that There are multiple mixers, and at least one of the multiple mixers introduces a mixed gas into the ignition chamber.

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