Continuous supersonic speed airflow jet type soot blower

Abstract

The invention provides a continuous supersonic speed airflow jet type soot blower which comprises a mixer, an ignition assembly, a shock wave tank and a jet assembly, the mixer is provided with an air inlet and a fuel gas inlet, the air inlet is used for introducing air into the mixer, the fuel gas inlet is used for introducing combustible gas into the mixer, and the jet assembly is used for jetting the fuel gas into the mixer. The ignition assembly comprises an ignition chamber and an igniter, the ignition chamber is connected with the mixer, the igniter is arranged in the ignition chamber and used for igniting mixed gas in the ignition chamber, the shock wave tank is connected with the ignition chamber and used for storing gas exhausted by the ignition chamber, the injection assembly comprises an injection pipe, one end of the injection pipe is connected with the shock wave tank, and the other end of the injection pipe is connected with the shock wave tank. And the other end of the injection pipe is arranged in the air pre-heater. The continuous supersonic speed airflow jet type soot blower has the advantages of being low in energy consumption and good in cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of soot blowers, and in particular to a continuous supersonic airflow jet type soot blower. Background Art

[0002] In order to maintain the efficient operation of the air preheater, regular cleaning and soot blowing are essential. Traditional soot blowing methods, such as compressed air blowing, steam injection and mechanical vibration, usually face problems such as low soot blowing efficiency, high energy consumption and incomplete cleaning. Especially when dealing with long pipelines, complex structures or highly sticky dust, traditional soot blowing methods often cannot achieve the ideal cleaning effect. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to some extent. To this end, an embodiment of the present invention provides a continuous supersonic airflow jet sootblower, which has the advantages of low energy consumption and good cleaning effect.

[0004] The continuous supersonic airflow jet sootblower of the embodiment of the present invention comprises:

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

[0006] An ignition assembly, the ignition assembly comprising an ignition chamber and an igniter, the ignition chamber is connected to the mixer, and the igniter is placed in the ignition chamber to ignite the mixed gas in the ignition chamber;

[0007] A shock tank, the shock tank being connected to the ignition chamber and used for storing the gas exhausted from the ignition chamber;

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

[0009] The continuous supersonic airflow jet sootblower of the embodiment of the present invention can effectively remove the accumulated dust on the air preheater through the rapid expansion of the gas in the shock tank and the high-pressure jet of the jet assembly, thereby improving the sootblowing 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, the tube diameter of the first section gradually decreases along the direction from the first section to the second section, and the tube diameter of the third section gradually increases along the direction from the second section to the third section.

[0011] In some embodiments, the injection segment has a plurality of injection ports, and the plurality of injection ports are arranged at intervals along the circumference of the injection segment.

[0012] In some embodiments, the continuous supersonic airflow jet sootblower of the embodiment of the present invention further comprises a plurality of jet port groups, wherein the plurality of jet port groups are arranged at intervals along the length direction of the jet pipe, and one jet port group comprises a plurality of the jet ports.

[0013] In some embodiments, the injection segment is rotatable relative to the injection pipe in a circumferential direction around the axial direction of the injection pipe.

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

[0015] In some embodiments, the continuous supersonic airflow jet soot blower of an embodiment of the present invention further includes a detection component, the air inlet and the gas inlet are both provided with control valves, the detection component includes a first detection component, the first detection component is connected to the first section for detecting the gas flow rate in the first section, the first detection component is electrically connected to the control valve, so that the control valve adjusts its own opening and closing degree according to the detection data of the first detection component.

[0016] In some embodiments, the detection component also includes a second detection component, which is connected to the third section for detecting the gas flow rate in the first section, and the second detection component 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 second detection component.

[0017] In some embodiments, the continuous supersonic airflow jet soot blower of an embodiment of the present invention also includes a moving assembly, which includes a fixed seat, a moving seat and a moving drive member, the moving seat connects the jet assembly and the fixed seat, and the moving drive member is connected to the moving seat for driving the moving seat to move on the fixed seat.

[0018] In some embodiments, there are a plurality of mixers, and at least one of the plurality of mixers passes the mixed gas into the ignition chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a continuous supersonic airflow jet sootblower according to an embodiment of the present invention.

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

[0021] Reference numerals:

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

[0023] 2. Ignition assembly, 21. Ignition chamber, 22. Ignitor,

[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 port, 416. Injection drive,

[0026] 51. first detection member, 52. second detection member,

[0027] 6. Moving assembly, 61. Fixed seat, 62. Moving seat. DETAILED DESCRIPTION

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

[0029] like Figure 1 and Figure 2 As shown, the continuous supersonic airflow jet sootblower according to the embodiment of the present invention comprises: a mixer 1 , an ignition assembly 2 , a shock pot 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. The igniter 22 is placed in the ignition chamber 21 to ignite the mixed gas in 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 in the air preheater.

[0031] Specifically, Figure 1 and Figure 2As shown, the mixer 1 is connected to the ignition assembly 2 through a pipeline or other connectors. The air inlet 11 receives air from an external air source, and the gas inlet 12 receives combustible gas (such as natural gas, acetylene, etc.). The air and gas are mixed in the mixer 1 to form a mixed gas suitable for combustion. The ignition chamber 21 is connected to the mixer 1 through a pipeline, and the igniter 22 is placed in the ignition chamber 21. The shock tank 3 is connected to the ignition chamber 21 through a pipeline to receive the gas discharged from the ignition chamber 21. Among them, the function of the shock tank 3 is to store and accelerate the gas discharged from the ignition chamber 21, so that it expands rapidly and generates shock waves. One end of the injection pipe 41 is connected to the shock tank 3, and the other end is placed in the air preheater, directly pointing to the area that needs to be cleaned (i.e., the inside of the air preheater). The injection pipe 41 injects the high-pressure and high-speed gas in the shock tank 3 into the air preheater, and uses the impact force of the supersonic airflow to remove the accumulated dust.

[0032] It is understood that the mixed gas generated by the mixer 1 is transferred to the ignition chamber 21 through the pipeline, and the igniter 22 ignites the mixed gas to start the combustion process. The gas generated by the combustion enters the shock tank 3 through the pipeline, and the shock tank 3 stores the gas and prepares to generate shock waves. The gas in the shock tank 3 is injected into the air preheater through the injection pipe 41, generating a strong shock wave to remove the accumulated dust.

[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 to say, the continuous supersonic airflow jet sootblower of the embodiment of the present invention is equipped with more than one mixer 1, and each mixer 1 has its independent air inlet 11 and gas inlet 12. Then, through multiple mixers 1, mixed gas can be provided 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 , and the plurality of injection ports 415 are arranged at intervals along the circumference of the injection section 414 .

[0035] That is to say, the continuous supersonic airflow jet soot blower of the embodiment of the present invention can effectively remove the accumulated dust on the air preheater through the rapid expansion of the gas in the shock tank 3 and the high-pressure injection of the injection assembly 4, thereby improving the soot blowing efficiency.

[0036] Therefore, the continuous supersonic airflow jet sootblower of the embodiment of the present invention achieves efficient and safe sootblowing effect through continuous airflow jet, and is easy to operate and has low maintenance cost.

[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 along the direction from the first section 411 to the second section 412, and the diameter of the third section 413 gradually increases along the direction from the second section 412 to the third section 413.

[0038] Specifically, Figure 1 and Figure 2 As shown, the diameter of the first section 411 gradually decreases from left to right, the diameter of the third section 413 gradually increases from left to right, and the second section 412 is connected between the first section 411 and the third section 413. The diameter of the second section 412 is equal to the diameter of the right port of the first section 411 and the left port of the third section 413.

[0039] It can be understood that the first section 411, the second section 412 and the third section 413 form a convergent-divergent pipeline, that is, the airflow discharged from the shock tank 3 can achieve acceleration after passing through. That is to say, in the convergent section (first section 411), since the channel cross-section gradually decreases, according to the principles of fluid mechanics, the flow rate of the gas will increase and the pressure will decrease. This is a phenomenon described by the continuity equation and the Bernoulli equation. On the contrary, when the gas flows from the second section 412 to the third section 413, it helps to reduce the airflow pressure to a certain extent before the injection section 414, preparing for the injection section 414 to generate an efficient shock wave. The formation of shock waves can enhance the impact of the airflow on the accumulated dust.

[0040] In addition, when the fluid enters the injection pipe 41, the convergence-divergence degree of the injection 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. In this way, continuous supersonic airflow injection to the air preheater is achieved to ensure the cleaning effect.

[0041] It should be noted that the shock tank 3 is a key component in the gas shock wave generating device, and its main functions include energy storage and release, that is, the shock tank 3 is usually used to store high-pressure gas. These gases generate high temperature and high pressure by igniting the mixed gas in the combustion chamber. When a certain level is reached, they will be quickly released to generate shock waves. The design of the shock tank 3 allows the gas to accumulate pressure in the tank. When the pressure reaches a preset value, it is instantly released through the pressure relief release structure to form a high-pressure shock wave. When the high-pressure gas in the shock tank 3 is released instantly, a shock wave (or shock wave) will be formed at the outlet of the tank body. This shock wave has high energy and can be used for cleaning and descaling of industrial equipment. The design parameters of the shock tank 3 (such as the size of the tank body, the size and distribution of the 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, such as reducing the force of the shock wave on the surrounding environment and equipment through the buffering effect of the tank body. The shock tank 3 is usually equipped with a safety valve and a pressure relief system to prevent the occurrence of overpressure and ensure the safe operation of the entire system.

[0043] In some embodiments, the continuous supersonic airflow jet sootblower of the embodiment of the present invention further comprises a plurality of jet ports 415 groups, wherein the plurality of jet ports 415 groups are arranged along the length direction of the jet pipe 41 (eg Figure 1 The plurality of injection ports 415 are arranged at intervals in the left-right direction (in the right and left directions), and one injection port 415 group includes a plurality of injection ports 415.

[0044] It is understandable that if Figure 1 and Figure 2 As shown, a plurality of injection ports 415 groups are provided along the length direction of the injection pipe 41, and each injection port 415 group is composed of a plurality of injection ports 415. There is a certain interval between the injection port 415 groups to ensure that each injection port 415 group can effectively cover different areas of the air preheater. The injection ports 415 in each injection port 415 group are all oriented toward the inner surface of the air preheater for injecting supersonic airflow.

[0045] That is to say, the design of multiple injection port 415 groups can ensure that the entire inner surface of the air preheater can be covered by the supersonic airflow, reducing the soot blowing dead corners and improving the cleaning effect.

[0046] In some embodiments, the injection section 414 is rotatable relative to the injection tube 41 in the circumferential direction around the axial direction of the injection tube 41. Figure 1 and Figure 2 As shown, the injection section 414 is located at the rightmost end of the injection pipe 41 to inject the supersonic airflow to the inner surface of the air preheater. The injection section 414 can rotate circumferentially relative to the axial direction of the injection pipe 41, usually through some kind of rotating mechanism (such as motor drive, etc.).

[0047] It is understood that the rotatability of the injection section 414 allows the operator to adjust the injection direction to better adapt to 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 injection assembly 4 further includes an injection driving member 416 , which is connected to the third section 413 , and a driving portion of the injection driving member 416 is connected to the injection section 414 for driving the injection section 414 to rotate.

[0049] It can be understood that the injection driving member 416 can be a driving motor, and the output shaft of the driving 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 embodiment of the present invention also includes a detection component, the air inlet 11 and the gas inlet 12 are both provided with control valves, the detection component includes a first detection component 51, the first detection component 51 is connected to the first section 411 for detecting the gas flow rate in the first section 411, the first detection component 51 is electrically connected to the control valve so that the control valve adjusts its own opening and closing degree according to the detection data of the first detection component 51.

[0051] Specifically, Figure 1 and Figure 2 As shown, the first detection member 51 is connected to the side wall of the first section 411, and the first detection member 51 is used to detect the gas flow rate in the first section 411. The control valve is located at the air inlet 11 and the gas inlet 12, and is used to adjust the flow of air and gas. The first detection member 51 is electrically connected to the control valve so as to automatically adjust the opening and closing degree of the valve according to the detection data.

[0052] It is understandable that the first detection component 51 can detect the gas flow rate in the first section 411 in real time and feed back the detection data to the control valve. The control valve automatically adjusts the opening and closing degree according to the detection data to ensure that the flow rate and pressure of the mixed gas are maintained at the optimal state. In other words, the electrical connection between the detection component and the control valve realizes automatic adjustment without manual intervention, thereby improving the automation of the soot blower. By accurately controlling the flow rate and pressure of the mixed gas, it can ensure that the combustion is more complete and stable, and improve the combustion efficiency. In addition, automatic adjustment can reduce the waste of fuel and air and reduce operating costs.

[0053] In some embodiments, the detection component also includes a second detection component 52, which is connected to the third section 413 for detecting the gas flow rate in the first section 411, and the second detection component 52 is electrically connected to the control valve so that the control valve adjusts its own opening and closing degree according to the detection data of the second detection component 52.

[0054] It is understandable that the second detection member 52 is used to detect the gas flow rate in the third section 413, and the second detection member 52 is electrically connected to the control valve so as to automatically adjust the opening and closing degree of the valve according to the detection data. In other words, the second detection member 52 provides detection data different from that of the first detection member 51, that is, the first detection member 51 detects the flow rate of the gas discharged from the shock tank 3, and the second detection member 52 detects the flow rate of the gas after passing through the third section 413. Through double detection, errors can be reduced and the accuracy of the detection results can be improved.

[0055] In addition, the addition of the second detection component 52 constitutes a redundant system. Even if one detection component fails, the other detection component can still continue to provide data to ensure that the soot blower can continue to work normally. The two detection components work simultaneously, and the gas flow rate in the first section 411 can be monitored in real time, providing more timely data feedback for the control valve.

[0056] In some embodiments, the continuous supersonic airflow jet soot blower of an embodiment of the present invention also includes a moving component 6, the moving component 6 includes a fixed seat 61, a moving seat 62 and a moving drive component, the moving seat 62 connects the injection component 4 and the fixed seat 61, and the moving drive component is connected to the moving seat 62 for driving the moving seat 62 to move on the fixed seat 61.

[0057] It is understandable that if Figure 1 and Figure 2 As shown, the fixed seat 61 is connected to the moving seat 62 as the fixed part of the moving assembly 6, and provides a fixed base for the moving seat 62. The moving seat 62 connects the injection assembly 4 and the fixed seat 61, and can move relative to the fixed seat 61. The moving drive member is connected to the moving seat 62 to drive the moving seat 62 to move on the fixed seat 61.

[0058] That is, the moving assembly 6 can drive the injection assembly 4 to move in the left and right directions, so that different areas of the air preheater can be cleaned. In addition, the design of the moving assembly 6 enables the soot blower to adapt to air preheaters (air preheaters) of different sizes and shapes, and to perform cleaning operations at different positions. Therefore, through the moving action of the moving assembly 6 on the injection assembly 4, the soot blower can more effectively cover all areas of the air preheater, improve the cleaning efficiency, and reduce the dust accumulation of the air preheater.

[0059] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0064] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A continuous supersonic airflow jet sootblower, characterized in that: include: A mixer, the mixer having an air inlet and a gas inlet, the air inlet is used to introduce air into the mixer, and the gas inlet is used to introduce combustible gas into the mixer; An ignition assembly, the ignition assembly comprising an ignition chamber and an igniter, the ignition chamber is connected to the mixer, and the igniter is placed in the ignition chamber to ignite the mixed gas in the ignition chamber; A shock tank, the shock tank being connected to the ignition chamber and used for storing the gas exhausted from the ignition chamber; The injection assembly comprises an injection pipe, one end of which is connected to the shock tank, and the other end of which is placed in the air preheater.

2. The continuous supersonic airflow 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 which are connected in sequence. The diameter of the first section gradually decreases along the direction from the first section to the second section, and the diameter of the third section gradually increases along the direction from the second section to the third section.

3. The continuous supersonic airflow jet sootblower according to claim 2, characterized in that: The injection section has a plurality of injection ports, and the plurality of injection ports are arranged at intervals along a circumferential direction of the injection section.

4. The continuous supersonic airflow jet sootblower according to claim 3, characterized in that: It also includes a plurality of injection port groups, which are arranged at intervals along the length direction of the injection pipe, and one injection port group includes a plurality of the injection ports.

5. The continuous supersonic airflow jet sootblower according to claim 4, characterized in that: The injection section is rotatable relative to the injection pipe in a circumferential direction around an axial direction of the injection pipe.

6. The continuous supersonic airflow jet sootblower according to claim 5, characterized in that: The injection assembly further includes an injection driving member, which is connected to the third section, and a driving portion of the injection driving member is connected to the injection section to drive the injection section to rotate.

7. The continuous supersonic airflow jet sootblower according to claim 2, characterized in that: It also includes a detection component, and the air inlet and the gas inlet are both provided with control valves. The detection component includes a first detection component, and the first detection component is connected to the first section for detecting the gas flow rate in the first section. The first detection component is electrically connected to the control valve so that the control valve can adjust its own opening and closing degree according to the detection data of the first detection component.

8. The continuous supersonic airflow jet sootblower according to claim 7, characterized in that: The detection component also includes a second detection component, which is connected to the third section for detecting the gas flow rate in the first section. The second detection component 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 second detection component.

9. The continuous supersonic airflow jet sootblower according to any one of claims 1 to 8, characterized in that: It also includes a moving assembly, which includes a fixed seat, a moving seat and a moving drive member. The moving seat connects the injection assembly and the fixed seat, and the moving drive member is connected to the moving seat to drive the moving seat to move on the fixed seat.

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

Images