Soot blower adaptive to sector area of rotary air pre-heater

Abstract

The invention provides a soot blower adapting to the sector area of a rotary air pre-heater, the soot blower adapting to the sector area of the rotary air pre-heater comprises a gas storage tank, a pressurizing piece and a spraying assembly, the gas storage tank is provided with a gas inlet and a gas outlet, the pressurizing outlet is connected with the gas inlet, the spraying assembly comprises a spraying main pipe and a spraying branch pipe, and the spraying branch pipe is connected with the pressurizing piece. The spraying main pipe is connected with the gas outlet, the spraying branch pipe is communicated with the spraying main pipe and located at the end, away from the gas storage tank, of the spraying main pipe, the spraying branch pipe comprises a first section and a second section, the first section is connected between the spraying main pipe and the second section, and the second section is provided with a plurality of spraying holes which are arranged at intervals in the length direction of the spraying pipe; in the direction from the first section to the second section, the pipe diameter of the second section is gradually reduced, the multiple spraying branch pipes can rotate in the first direction, and the first direction is orthogonal to the extending direction of the spraying main pipe. The soot blower adapting to the sector area of the rotary air pre-heater has the advantage of being good in cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of soot blowers, and in particular to a soot blower adapted to the sector area of ​​a rotary air preheater. Background Art

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

[0003] In the related art, the rotary air preheater usually has 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 mode of the rotary air preheater, it is relatively difficult to clean. The traditional soot blowing method (such as compressed air, steam blowing, 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 the large fan-shaped heat exchange area, it is difficult to ensure that the soot is completely removed. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention proposes 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 ​​the rotary air preheater according to the embodiment of the present invention comprises:

[0006] A gas storage tank, wherein the gas storage tank has a gas inlet and a gas outlet;

[0007] A pressurizing member, wherein the pressurizing outlet is connected to the gas inlet, so as to be used for introducing compressed gas into the gas storage tank;

[0008] An injection assembly, the injection assembly includes an injection main pipe and an injection branch pipe, the injection main pipe is connected to the gas outlet, the injection branch pipe is connected to the injection main pipe and is located at one end of the injection main pipe and the gas storage tank, the injection branch pipe includes a first section and a second section, the first section is connected between the injection main pipe and the second section, the second section has a plurality of injection holes, the plurality of injection holes are arranged at intervals along the length direction of the injection pipe, and the diameter of the second section gradually decreases in the direction from the first section to the second section, the plurality of injection branch pipes are rotatable along a first direction, and the first direction is orthogonal to the extension direction of the injection main pipe.

[0009] The rotatable design of the sootblower injection branch pipe adapted to the rotary air preheater sector area in the embodiment of the present invention enables multiple injection branch pipes to adjust the injection angle according to the position of the air preheater sector area, ensuring that the injection airflow can effectively cover the target area. In addition, the rotatable design of the injection branch pipe enables the sootblower to flexibly adjust the injection position without taking up too much space.

[0010] In some embodiments, the injection assembly further includes an elastic member, and the elastic member is multiple, and one elastic member is connected between two adjacent injection branch pipes. The injection assembly has a first state and a second state.

[0011] In the first state, the elastic member is in a compressed state, and the extension direction of the plurality of injection branch pipes is consistent with the extension direction of the injection main pipe;

[0012] In the second state, the elastic member is in an initial state, and an angle is formed between the extending directions of two adjacent ones of the plurality of injection branch pipes.

[0013] In some embodiments, it is characterized in that the injection assembly also includes a control valve and a detection component, the control valve is connected to the first section for controlling the gas flow rate in the first section, the detection component is connected to the first section and is located downstream of the control valve, the detection component is electrically connected to the control valve so that the detection component 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, the soot blower adapted to the sector area of ​​the rotary air preheater according to the embodiment of the present invention further comprises a plurality of injection hole groups, wherein the plurality of injection hole groups are arranged at intervals along the circumference of the injection pipe, and one injection control group comprises a plurality of the injection holes.

[0015] In some embodiments, a radial direction of the injection hole and a radial direction of the injection pipe form an included angle.

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

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

[0018] In some embodiments, the diameter of the injection hole gradually decreases along the flow direction of the airflow.

[0019] In some embodiments, the soot blower adapted to the sector area of ​​the rotary air preheater according to an embodiment of the present invention further includes a moving assembly, the moving assembly including a fixed seat, a moving seat and a moving drive member, the moving seat connects the injection assembly and the fixed seat, the moving drive member is connected to the moving seat for driving the moving seat to move on the fixed seat.

[0020] In some embodiments, there are multiple gas storage tanks, and at least one of the multiple gas storage tanks supplies mixed gas to the injection main pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram 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 It is a schematic diagram of the injection assembly of the sootblower adapted to the sector-shaped area of ​​the rotary air preheater according to an embodiment of the present invention in a first state.

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

[0024] Figure 4 yes Figure 1 An enlarged schematic diagram of A is shown in FIG.

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

[0026] Reference numerals:

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

[0028] 2. Pressurized parts,

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

[0030] 4. Moving assembly, 41. Fixed seat, 42. Moving seat. DETAILED DESCRIPTION

[0031] 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.

[0032] like Figure 1-Figure 5As shown, the soot blower adapted to the sector area of ​​the rotary air preheater according to the embodiment of the present invention comprises: an air storage tank 1, a pressurizing member 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 an injection main pipe 31 and an injection branch pipe 32. The injection main pipe 31 is connected to the gas outlet 12. The injection branch pipe 32 is connected to the injection main pipe 31 and is located at one end of the injection main pipe 31 in the gas storage tank 1. The injection branch pipe 32 includes 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. The second section 322 has a plurality of injection holes 323. The plurality of injection holes 323 are arranged at intervals along the length direction 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 a plurality of injection branch pipes 32. The plurality of injection branch pipes 32 can rotate along a first direction. The first direction is orthogonal to the extension direction of the injection main pipe 31.

[0034] Specifically, Figure 1 As shown, the inlet of the pressurizing member 2 is used to extract air and pressurize the extracted air. The gas inlet 11 of the gas storage tank 1 is connected to the outlet of the pressurizing member 2 through a pipeline so as to receive the pressurized gas discharged from the pressurizing member 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 transmit the pressurized gas in the gas storage tank 1 to the injection main pipe 31. A plurality of injection branch pipes 32 are connected to the injection main pipe 31 through pipelines so that the pressurized gas can be ejected through the injection holes 323 on the injection branch pipes 32.

[0035] It is understandable that the multiple injection branch pipes 32 can rotate around the first direction, so that the arrangement of the multiple injection branch pipes 32 coincides with the contour 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 member may be a compressor. The injection branch pipe 32 and the injection main pipe 31 may 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 the mixed gas to the injection main pipe 31. It can be understood that by using multiple gas storage tanks 1, the continuity and stability of gas supply can be ensured, and the injection interruption caused by insufficient pressure in a single tank can be avoided.

[0038] In addition, the design of multiple tanks provides redundancy. Even if one tank fails, other tanks can continue to supply mixed gas, improving the reliability of the system. Of course, different tanks can be flexibly switched according to actual needs, for example, when the backup tank is full, or when the main tank is maintained, the backup tank is used.

[0039] It is understandable that the gas tank 1 can collect and store the compressed gas discharged from the pressurizing member 2, and a pressure detector is provided on the gas tank 1 to detect the gas pressure condition in the gas tank 1 and provide a reference value for subsequent gas discharge. The pressurized gas in the gas tank 1 is discharged to the injection main pipe 31 through the gas outlet 12, and the pressurized gas is discharged to the air preheater through the injection main pipe 31 and the injection branch pipe 32 in turn for cleaning. Among them, 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 to the cleaning of the air preheater.

[0040] Therefore, the rotatable design of the sootblower injection branch pipe 32 adapted to the rotary air preheater sector area of ​​the embodiment of the present invention enables multiple injection branch pipes 32 to adjust the injection angle according to the position of the air preheater sector area, ensuring that the injection airflow can effectively cover the target area. In addition, the rotatable design of the injection branch pipe 32 enables the sootblower to flexibly adjust the injection position without taking up too much space.

[0041] In some embodiments, the injection assembly 3 further includes an elastic member 33, wherein there are multiple elastic members 33, and one elastic member 33 is connected between two adjacent injection branch pipes 32. The injection assembly 3 has a first state and a second state. In the first state, the elastic member 33 is in a compressed state, and the extension direction of the multiple injection branch pipes 32 is aligned with the extension direction of the injection main pipe 31 (e.g. Figure 1 in the left and right directions); in the second state, the elastic member 33 is in the initial state, and the extension directions of two adjacent injection branch pipes 32 in the plurality of injection branch pipes 32 have an angle between them.

[0042] Specifically, Figure 1-Figure 3 As shown, there are multiple elastic members 33, and each elastic member 33 is located between two adjacent injection branch pipes 32 to play a connecting and buffering role.

[0043] It can be understood that the injection assembly 3 is in the first state, and the elastic member 33 is in a compressed state. In this state, the extension direction of the plurality of injection branch pipes 32 is consistent with the extension direction of the injection main pipe 31, that is, the injection holes 323 of all the injection branch pipes 32 point in the same direction, so as to facilitate the insertion of the injection assembly 3 into the interior of the air preheater.

[0044] The spray assembly 3 is in the second state, and the elastic member 33 is in the initial state, that is, the elastic member 33 is not compressed or stretched. In this state, there is an angle between the extension directions of two adjacent spray branches 32, so that the spray direction of the spray hole 323 is offset, that is, the multiple spray branches 32 form a fan-like 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 hold the multiple injection branch pipes 32) to place the multiple injection branch pipes 32 in the first state. When the injection branch pipes 32 are inserted into the air preheater, the manual restraints on the injection branch pipes 32 are contacted, and the multiple injection branch pipes 32 are deflected under the action of the elastic member 33, thereby forming a fan-shaped distribution.

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

[0047] It is understandable that if Figure 1 As shown, the control valve 34 is connected to the wall of the first section 321, and the control valve 34 can adjust the gas flow rate in the first section 321 as needed, so as to accurately control the air flow rate and pressure sprayed onto the inner surface of the air preheater. In addition, by adjusting the gas flow rate, the impact force of the air flow on the inner surface of the air preheater can be optimized to improve the cleaning effect. In other words, under different working conditions, the air flow rate can be adjusted by the control valve 34 to meet different soot blowing requirements.

[0048] That is, the detection member 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 opening and closing degree of the valve according to the detection information to ensure that the gas flow rate remains stable. Therefore, by accurately controlling the gas flow rate, the impact force of the gas flow on the inner surface of the air preheater can be optimized to improve the cleaning effect.

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

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

[0051] Optionally, the radial direction of the injection hole 323 and the radial direction of the injection pipe have an angle. Figure 4 As shown, there is an angle between the injection hole 323 and the radial direction of the injection pipe, so that the opening directions of the multiple injection holes 323 can be the same or different, that is, the opening directions of the multiple injection holes 323 are the same, and the radial directions of the multiple injection holes 323 are arranged in parallel. In order to effectively cover the inner surface of the air preheater, and according to the different internal structures of the air preheater, injection holes 323 with different radial inclination degrees can be selected to increase the breadth of the cleaning range by changing the airflow direction, ensuring that the airflow can reach more areas of the inner surface of the air preheater.

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

[0053] like Figure 5 As shown, the radial angle between two adjacent injection holes 323 is, so that the angle design between adjacent injection holes 323 ensures the uniform distribution of airflow on the inner surface of the air preheater and reduces the cleaning dead angle. Since the angle between the injection holes 323 is greater than 0 degrees and less than 90 degrees, it is ensured that there is no relative arrangement between the injection holes 323, so that the airflows generated by adjacent injection holes 323 will not directly collide, reducing the interference between the airflows and improving the cleaning efficiency.

[0054] Of course, depending on the internal structure of the air preheater, a specific angle design may also be involved to help optimize the angle of the injected 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 aperture of the injection hole 323 gradually decreases in the direction of the airflow. It is understandable that the aperture of the injection hole 323 gradually decreases in the direction of the airflow, that is, the aperture value gradually decreases from the inlet end to the outlet end of the injection hole 323. That is, according to the Bernoulli principle, when the gas passes through the gradually decreasing aperture, the flow rate will increase. This means that the airflow will reach a higher speed at the outlet end of the injection hole 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 accumulated on the inner surface of the air preheater.

[0057] In some embodiments, the soot blower adapted to the sector area of ​​the rotary air preheater according to an embodiment of the present invention also includes a moving component 4, the moving component 4 includes a fixed seat 41, a moving seat 42 and a moving drive component, the moving seat 42 connects the injection component 3 and the fixed seat 41, and the moving drive component is connected to the moving seat 42 for driving the moving seat 42 to move on the fixed seat 41.

[0058] It is understandable that if Figure 1 As shown, the fixed seat 41 is connected to the moving seat 42 as the fixed part of the moving assembly 4, and provides a fixed base for the moving seat 42. The moving seat 42 connects the injection assembly 3 and the fixed seat 41, and can move relative to the fixed seat 41. The moving drive is connected to the moving seat 42 to drive the moving seat 42 to move on the fixed seat 41.

[0059] That is to say, the moving assembly 4 can drive the injection assembly 3 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 4 enables the soot blower to adapt to air preheaters of different sizes and shapes, and to perform cleaning operations at different positions. Therefore, through the moving action of the moving assembly 4 on the injection assembly 3, the soot blower can more effectively cover all areas of the air preheater, improve cleaning efficiency, and reduce dust accumulation.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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 sootblower adapted to the sector area of ​​a rotary air preheater, characterized in that: include: A gas storage tank, wherein the gas storage tank has a gas inlet and a gas outlet; A pressurizing member, wherein the pressurizing outlet is connected to the gas inlet, so as to be used for introducing compressed gas into the gas storage tank; An injection assembly, the injection assembly includes an injection main pipe and an injection branch pipe, the injection main pipe is connected to the gas outlet, the injection branch pipe is connected to the injection main pipe and is located at one end of the injection main pipe and the gas storage tank, the injection branch pipe includes a first section and a second section, the first section is connected between the injection main pipe and the second section, the second section has a plurality of injection holes, the plurality of injection holes are arranged at intervals along the length direction of the injection pipe, and the diameter of the second section gradually decreases in the direction from the first section to the second section, the plurality of injection branch pipes are rotatable along a first direction, and the first direction is orthogonal to the extension direction of the injection main pipe.

2. The soot blower adapted to the sector area of ​​the rotary air preheater according to claim 1 is characterized in that: The spray assembly further includes an elastic member, which is in multiple numbers, and one elastic member is connected between two adjacent spray branch pipes. The spray assembly has a first state and a second state. In the first state, the elastic member is in a compressed state, and the extension direction of the plurality of injection branch pipes is consistent with the extension direction of the injection main pipe; In the second state, the elastic member is in an initial state, and an angle is formed between the extending directions of two adjacent ones of the plurality of injection branch pipes.

3. The soot blower adapted to the sector area of ​​the rotary air preheater according to claim 2 is characterized in that: The injection assembly also includes a control valve and a detection component. The control valve is connected to the first section for controlling the gas flow rate in the first section. The detection component is connected to the first section and is located downstream of the control valve. The detection component is electrically connected to the control valve so that the detection component 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.

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

5. The soot blower adapted to the sector area of ​​the rotary air preheater according to claim 4 is characterized in that: The radial direction of the injection hole and the radial direction of the injection pipe form an included angle.

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

7. The soot blower adapted to the sector area of ​​the rotary air preheater according to claim 5 is characterized in that: The injection holes are arranged in radial direction in parallel.

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

9. The soot blower adapted to the sector area of ​​the rotary air preheater according to claim 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 soot blower adapted to the sector area of ​​the 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 mixed gas into the injection main pipe.

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