Soot blower adapted to sector area of rotary air preheater

Abstract

A soot blower adapted to a sector area of a rotary air preheater, comprising: a gas storage tank (1), a pressurizing member (2), and an injection assembly (3). The gas storage tank (1) is provided with a gas inlet (11) and a gas outlet (12); an outlet of the pressurizing member (2) is connected to the gas inlet (11); the injection assembly (3) comprises an injection main pipe (31) and injection branch pipes (32); the injection main pipe (31) is connected to the gas outlet (12); the injection branch pipes (32) are communicated with the injection main pipe (31) and are located at the end of the injection main pipe (31) distant from the gas storage tank (1); each injection branch pipe (32) comprises a first section (321) and a second section (322); the first section (321) is connected between the injection main pipe (31) and the second section (322); a plurality of injection holes (323) are formed in the second section (322); the plurality of injection holes (323) are arranged at intervals in the length direction of the injection branch pipe (32); in the direction from the first section (321) to the second section (322), the pipe diameter of the second section (322) gradually decreases; a plurality of injection branch pipes (32) are provided; the plurality of injection branch pipes (32) are rotatable in a first direction; and the first direction is orthogonal to the extension direction of the injection main pipe (31). The soot blower adapted to the sector area of a rotary air preheater has the advantage of excellent cleaning effect.

Description

A soot blower adapted to the sector area of ​​a rotary air preheater Technical Field

[0001] This invention relates to the field of soot blower technology, and more specifically, to a soot blower adapted to the sector area of ​​a rotary air preheater. Background Technology

[0002] In energy recovery systems such as thermal power plants and industrial boilers, air preheaters are important heat exchange devices, mainly used to recover heat from flue gas and transfer it to the air entering the combustion system, thereby improving the system's thermal efficiency.

[0003] In related technologies, rotary air preheaters typically have a fan-shaped structure, which effectively exchanges heat between hot flue gas and cold air through rotation. However, due to the unique structure and working method of rotary air preheaters, they are relatively difficult to clean. Traditional soot blowing methods (such as compressed air, steam jet, etc.) may not be able to completely cover every part of the fan-shaped area during the cleaning process, resulting in uneven cleaning effect, especially in large fan-shaped heat exchange areas, where it is difficult to ensure that the accumulated ash is completely removed. Summary of the Invention

[0004] 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 soot blower adapted to the sector area of ​​a rotary air preheater, which has the advantage of good cleaning effect.

[0005] The soot blower adapted to the sector area of ​​a rotary air preheater according to embodiments of the present invention includes:

[0006] A gas storage tank having a gas inlet and a gas outlet;

[0007] A pressurizing element, wherein the pressurizing outlet is connected to the gas inlet for introducing compressed gas into the gas storage tank;

[0008] The injection assembly includes a main injection pipe and injection branch pipes. The main injection pipe is connected to the gas outlet, and the injection branch pipes are connected to the main injection pipe and located at one end of the main injection pipe from the gas storage tank. The injection branch pipes include a first section and a second section. The first section is connected between the main injection pipe and the second section. The second section has multiple injection holes, which are spaced apart along the length of the injection pipe. The diameter of the second section gradually decreases in the direction from the first section to the second section. There are multiple injection branch pipes, which are rotatable along a first direction orthogonal to the extension direction of the main injection pipe.

[0009] The rotatable design of the sootblower injection pipes in this embodiment of the invention, adapted to the fan-shaped area of ​​the rotary air preheater, allows multiple injection pipes to adjust their injection angles according to the position of the fan-shaped area of ​​the air preheater, ensuring that the injected airflow can effectively cover the target area. Furthermore, the rotatable design of the injection pipes allows the sootblower to flexibly adjust its injection position without occupying excessive space.

[0010] In some embodiments, the injection assembly further includes multiple elastic elements, one of which is connected between two adjacent injection sub-tubes. The injection assembly has a first state and a second state.

[0011] In the first state, the elastic element is in a compressed state, and the extension direction of the plurality of injection sub-tubes is consistent with the extension direction of the injection main tube;

[0012] In the second state, the elastic element is in the initial state, and there is an angle between the extension directions of two adjacent injection manifolds among the plurality of injection manifolds.

[0013] In some embodiments, the injection assembly further includes a control valve and a detection element. The control valve is connected to the first section for controlling the gas flow rate within the first section. The detection element is located downstream of the control valve and connected to the first section. The detection element is electrically connected to the control valve so that it transmits detection information to the control valve, and the control valve controls the opening and closing degree of the valve according to the detection information.

[0014] In some embodiments of the present invention, the soot blower adapted to the sector area of ​​a rotary air preheater further includes a plurality of injection hole groups, the plurality of injection hole groups being arranged at circumferential intervals along the injection pipe, and one injection control group including a plurality of injection holes.

[0015] In some embodiments, the radial direction of the injection hole forms an angle with the radial direction of the injection pipe.

[0016] In some embodiments, in one of the jet hole groups, the included angle between the radial directions of two adjacent jet holes is greater than 0 degrees and less than 90 degrees.

[0017] In some embodiments, the injection holes are arranged radially parallel.

[0018] In some embodiments, the diameter of the injection orifice gradually decreases in the direction of airflow.

[0019] In some embodiments of the present invention, the soot blower adapted to the sector area of ​​a rotary air preheater further includes a moving component, the moving component including a fixed base, a moving base and a moving drive, the moving base connecting the spraying 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.

[0020] In some embodiments, there are multiple gas storage tanks, and at least one of the multiple gas storage tanks supplies a mixed gas to the injection pipe. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the structure of a soot blower adapted to the sector area of ​​a rotary air preheater according to an embodiment of the present invention.

[0022] Figure 2 is a schematic diagram of the spray assembly of the soot blower adapted to the sector area of ​​the rotary air preheater in the first state according to an embodiment of the present invention.

[0023] Figure 3 is a schematic diagram of the spray assembly of the soot blower adapted to the sector area of ​​the rotary air preheater in the second state according to an embodiment of the present invention.

[0024] Figure 4 is an enlarged schematic diagram of A shown in Figure 1.

[0025] Figure 5 is a schematic diagram of the spray hole structure of a soot blower adapted to the sector area of ​​a rotary air preheater according to another embodiment of the present invention.

[0026] Figure label:

[0027] 1. Gas storage tank; 11. Gas inlet; 12. Gas outlet.

[0028] 2. Pressure components,

[0029] 3. Injection assembly; 31. Injection main pipe; 32. Injection branch pipe; 321. First section; 322. Second section; 323. Injection orifice; 33. Elastic element; 34. Control valve; 35. Detection element.

[0030] 4. Movable component; 41. Fixed base; 42. Movable base. Detailed Implementation

[0031] 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.

[0032] As shown in Figures 1-5, the soot blower adapted to the sector area of ​​the rotary air preheater in this embodiment of the invention includes: an air storage tank 1, a pressurizing component 2, and an injection assembly 3.

[0033] The gas storage tank 1 has a gas inlet 11 and a gas outlet 12. The pressurized outlet is connected to the gas inlet 11 for introducing compressed gas into the gas storage tank 1. The injection assembly 3 includes a main injection pipe 31 and injection branch pipes 32. The main injection pipe 31 is connected to the gas outlet 12, and the injection branch pipes 32 are connected to the main injection pipe 31 and located at one end of the main injection pipe 31 from the gas storage tank 1. The injection branch pipes 32 include a first section 321 and a second section 322. The first section 321 is connected between the main injection pipe 31 and the second section 322. The second section 322 has a plurality of injection holes 323, which are spaced apart along the length of the injection pipe. In the direction from the first section 321 to the second section 322, the diameter of the second section 322 gradually decreases. There are multiple injection branch pipes 32, which are rotatable along a first direction orthogonal to the extension direction of the main injection pipe 31.

[0034] Specifically, as shown in Figure 1, the inlet of the pressurizing component 2 is used to draw in air and pressurize it. The gas inlet 11 of the gas storage tank 1 is connected to the outlet of the pressurizing component 2 via a pipe so as to receive the pressurized gas discharged from the pressurizing component 2. The gas outlet 12 of the gas storage tank 1 is connected to the injection main pipe 31 of the injection assembly 3 so as to transfer the pressurized gas in the gas storage tank 1 to the injection main pipe 31. Multiple injection branch pipes 32 are connected to the injection main pipe 31 via pipes so that the pressurized gas can be ejected through the injection holes 323 on the injection branch pipes 32.

[0035] Understandably, the multiple injection pipes 32 are rotatable around the first direction, so that the arrangement of the multiple injection pipes 32 matches the outline of the fan-shaped area inside the air preheater, thereby facilitating the cleaning of the fan-shaped area inside the air preheater.

[0036] It should be noted that the pressure component can be a compressor. The injection manifold 32 and the injection main manifold 31 can be connected by a flexible hose, such as a rubber hose.

[0037] In some embodiments, there are multiple gas storage tanks 1, and at least one of the multiple gas storage tanks 1 supplies mixed gas to the injection main pipe 31. It is understood that by using multiple gas storage tanks 1, the continuity and stability of the gas supply can be ensured, and injection interruption due to insufficient pressure in a single tank can be avoided.

[0038] Furthermore, the design of multiple storage tanks provides redundancy, ensuring that even if one tank fails, the others can continue to supply the mixed gas, improving system reliability. Of course, different tanks can be flexibly switched according to actual needs, for example, switching when the backup tank is full, or using the backup tank during maintenance of the main tank.

[0039] Understandably, the gas storage tank 1 can collect and store the compressed gas discharged from the pressurizing component 2, and a pressure detector is installed on the gas storage tank 1 to detect the gas pressure inside the gas storage tank 1 and provide reference values ​​for subsequent gas discharge. The pressurized gas in the gas storage tank 1 is discharged to the injection main pipe 31 through the gas outlet 12. The pressurized gas is then discharged to the air preheater for cleaning operations through the injection main pipe 31 and the injection branch pipe 32 in sequence. In particular, since the diameter of the second section 322 of the injection branch pipe 32 gradually decreases in the direction of gas flow (i.e., from left to right), the gas flow rate can be further increased, which is beneficial for cleaning the air preheater.

[0040] Therefore, the rotatable design of the sootblower injection pipe 32 adapted to the fan-shaped area of ​​the rotary air preheater in this embodiment of the invention allows multiple injection pipes 32 to adjust the injection angle according to the position of the fan-shaped area of ​​the air preheater, ensuring that the injected airflow can effectively cover the target area. Furthermore, the rotatable design of the injection pipes 32 allows the sootblower to flexibly adjust the injection position without occupying excessive space.

[0041] In some embodiments, the spray assembly 3 further includes multiple elastic elements 33, with one elastic element 33 connected between two adjacent spray pipes 32. The spray assembly 3 has a first state and a second state. In the first state, the elastic element 33 is in a compressed state, and the extension direction of the multiple spray pipes 32 is consistent with the extension direction of the main spray pipe 31 (the left-right direction in Figure 1). In the second state, the elastic element 33 is in an initial state, and there is an angle between the extension directions of two adjacent spray pipes 32.

[0042] Specifically, as shown in Figures 1-3, there are multiple elastic elements 33, and each elastic element 33 is located between two adjacent injection pipes 32, serving as a connection and buffer.

[0043] Understandably, the injection assembly 3 is in the first state, and the elastic element 33 is in a compressed state. In this state, the extension direction of the multiple injection sub-pipes 32 is consistent with the extension direction of the injection main pipe 31, that is, the injection holes 323 of all injection sub-pipes 32 point in the same direction, so as to facilitate the insertion of the injection assembly 3 into the air preheater.

[0044] The injection assembly 3 is in the second state, and the elastic element 33 is in the initial state, that is, the elastic element 33 is not compressed or stretched. In this state, there is an angle between the extension directions of two adjacent injection pipes 32, which causes the injection direction of the injection hole 323 to be offset, that is, the multiple injection pipes 32 form a fan-shaped distribution.

[0045] It should be noted that before the injection assembly 3 is inserted into the air preheater, the operator can manually intervene (i.e., manually grasp the multiple injection pipes 32) to place them in the first state. When the injection pipes 32 are inserted into the air preheater, the manual restraint on the injection pipes 32 will cause the multiple injection pipes 32 to deflect under the action of the elastic element 33, thus forming a fan-shaped distribution.

[0046] In some embodiments, the injection assembly 3 further includes a control valve 34 and a detection element 35. The control valve 34 is connected to the first section 321 to control the gas flow rate within the first section 321. The detection element 35 is connected to the first section 321 and located downstream of the control valve 34. The detection element 35 is electrically connected to the control valve 34 so that the detection element 35 transmits detection information to the control valve 34. The control valve 34 controls the opening and closing degree of the valve 34 according to the detection information.

[0047] As shown in Figure 1, the control valve 34 is connected to the wall of the first section 321. The control valve 34 can adjust the gas flow rate within the first section 321 as needed, thereby precisely controlling the airflow speed and pressure injected onto the inner surface of the air preheater. Furthermore, by adjusting the gas flow rate, the impact force of the airflow on the inner surface of the air preheater can be optimized, improving the cleaning effect. In other words, under different operating conditions, the airflow speed can be adjusted via the control valve 34 to adapt to different soot blowing requirements.

[0048] In other words, the detection element 35 can monitor the gas flow rate through the first section 321 in real time and transmit the detection information to the control valve 34. The control valve 34 automatically adjusts the valve opening degree according to the detection information to ensure that the gas flow rate remains stable. Thus, by precisely controlling the gas flow rate, the impact force of the airflow on the inner surface of the air preheater can be optimized, improving the cleaning effect.

[0049] In other words, control valve 34 can adjust the airflow speed as needed, avoiding unnecessary energy waste and thus saving energy consumption. Control valve 34 can also prevent the gas flow rate from being too high or too low, avoiding equipment damage or safety accidents caused by improper flow rate.

[0050] In some embodiments of the present invention, the soot blower adapted to the sector area of ​​the rotary air preheater further includes a plurality of injection holes 323 groups, which are arranged at intervals along the circumference of the injection pipe, and an injection control group includes a plurality of injection holes 323.

[0051] Optionally, the radial direction of the injection orifice 323 forms an angle with the radial direction of the injection pipe. It is understood that, as shown in Figure 4, the radial direction of the injection orifice 323 is at an angle to the radial direction of the injection pipe, allowing the openings of the multiple injection orifices 323 to face the same or different directions. That is, if the openings of the multiple injection orifices 323 face the same direction, then the multiple injection orifices 323 are arranged radially parallel. This allows for effective coverage of the inner surface of the air preheater. Furthermore, depending on the internal structure of the air preheater, injection orifices 323 with different radial inclinations can be selected to increase the cleaning range by changing the airflow direction, ensuring that the airflow reaches more areas of the inner surface of the air preheater.

[0052] In other embodiments, in a group of injection holes 323, the included angle between the radial directions of two adjacent injection holes 323 is greater than 0 degrees and less than 90 degrees.

[0053] As shown in Figure 5, the radial angle between two adjacent injection holes 323 is designed to ensure uniform airflow distribution on the inner surface of the air preheater, reducing cleaning dead zones. Since the angle between the injection holes 323 is greater than 0 degrees and less than 90 degrees, there is no relative arrangement between them, preventing direct airflow collisions and reducing interference between airflows, thus improving cleaning efficiency.

[0054] Of course, depending on the internal structure of the air preheater, a specific angle design can also be involved to help optimize the angle of the jet airflow, so that the airflow can better adapt to the shape of the inner surface of the air preheater and improve the cleaning effect.

[0055] In some embodiments, the orifice diameter of the injection orifice 323 gradually decreases along the direction of airflow. It is understood that the orifice diameter of the injection orifice 323 gradually decreases along the direction of airflow, that is, the orifice diameter value gradually decreases from the inlet end to the outlet end of the injection orifice 323. In other words, according to Bernoulli's principle, the flow velocity increases as the gas passes through the gradually decreasing orifice diameter. This means that the airflow will reach a higher velocity at the outlet end of the injection orifice 323, thereby enhancing the soot blowing effect.

[0056] In addition, the high-speed airflow generates a stronger impact force at the outlet end of the injection hole 323, which can more effectively remove the dust accumulation on the inner surface of the air preheater.

[0057] In some embodiments of the present invention, the soot blower adapted to the sector area of ​​the rotary air preheater further includes a moving component 4. The moving component 4 includes a fixed base 41, a moving base 42 and a moving drive. The moving base 42 is connected to the spraying component 3 and the fixed base 41. The moving drive is connected to the moving base 42 to drive the moving base 42 to move on the fixed base 41.

[0058] As can be understood, as shown in Figure 1, the fixed base 41 is connected to the movable base 42 as a fixed part of the movable component 4, and provides a fixed base for the movable base 42. The movable base 42 connects the spraying component 3 and the fixed base 41, and is movable relative to the fixed base 41. A moving drive is connected to the movable base 42 to drive the movable base 42 to move on the fixed base 41.

[0059] In other words, the moving component 4 can drive the spraying component 3 to move in the left and right directions, thereby enabling the cleaning of different areas of the air preheater. Furthermore, the design of the moving component 4 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 3 by the moving component 4, the sootblower can more effectively cover all areas of the air preheater, improving cleaning efficiency and reducing dust accumulation.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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 soot blower adapted to the sector-shaped area of ​​a rotary air preheater, characterized in that, include: A gas storage tank having a gas inlet and a gas outlet; A pressurizing element, wherein the pressurizing outlet is connected to the gas inlet for introducing compressed gas into the gas storage tank; The injection assembly includes a main injection pipe and injection branch pipes. The main injection pipe is connected to the gas outlet, and the injection branch pipes are connected to the main injection pipe and located at one end of the main injection pipe from the gas storage tank. The injection branch pipes include a first section and a second section. The first section is connected between the main injection pipe and the second section. The second section has multiple injection holes, which are spaced apart along the length of the injection pipe. The diameter of the second section gradually decreases in the direction from the first section to the second section. There are multiple injection branch pipes, which are rotatable along a first direction orthogonal to the extension direction of the main injection pipe.

2. The soot blower adapted to the sector area of ​​a rotary air preheater according to claim 1, characterized in that, The injection assembly further includes multiple elastic elements, with one elastic element connected between two adjacent injection sub-tubes. The injection assembly has a first state and a second state. In the first state, the elastic element is in a compressed state, and the extension direction of the plurality of injection sub-tubes is consistent with the extension direction of the injection main tube; In the second state, the elastic element is in the initial state, and there is an angle between the extension directions of two adjacent injection manifolds among the plurality of injection manifolds.

3. The soot blower adapted to the sector area of ​​a rotary air preheater according to claim 2, characterized in that, The injection assembly further includes a control valve and a detection element. The control valve is connected to the first section to control the gas flow rate within the first section. The detection element is located downstream of the control valve and connected to the first section. The detection element is electrically connected to the control valve so that it transmits detection information to the control valve. The control valve controls the opening and closing degree of the valve according to the detection information.

4. The soot blower adapted to the sector area of ​​a rotary air preheater according to claim 3, characterized in that, It also includes multiple groups of injection holes, which are arranged at circumferential intervals along the injection pipe, and one injection control group includes multiple injection holes.

5. The soot blower adapted to the sector area of ​​a rotary air preheater according to claim 4, characterized in that, The radial direction of the injection hole forms an angle with the radial direction of the injection pipe.

6. The soot blower adapted to the sector area of ​​a rotary air preheater according to claim 5, characterized in that, In one of the jet hole groups, the radial angle between two adjacent jet holes is greater than 0 degrees and less than 90 degrees.

7. The soot blower adapted to the sector area of ​​a rotary air preheater according to claim 5, characterized in that, The injection holes are arranged radially parallel.

8. The soot blower adapted to the sector area of ​​a rotary air preheater according to claim 6 or 7, characterized in that, The diameter of the injection orifice gradually decreases in the direction of airflow.

9. The soot blower adapted to the sector area of ​​a rotary air preheater according to claim 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 soot blower adapted to the sector area of ​​a rotary air preheater according to claim 9, characterized in that, There are multiple gas storage tanks, and at least one of the multiple gas storage tanks introduces a mixed gas into the injection main pipe.

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