Protective device for heating surface of soot blowing channel and boiler

Abstract

The utility model belongs to the technical field of boilers, and particularly discloses a soot blowing channel heating surface protection device and a boiler. Soot blowing channels are formed among the pipe groups in the boiler, and the pipe groups comprise horizontal pipe groups; the heating surface protection device of the soot blowing channel comprises a flow uniformizing plate, the flow uniformizing plate is arranged at the corner of the heating surface in the soot blowing channel and extends in the length direction of the soot blowing channel, an included angle is formed between the flow uniformizing plate and the horizontal pipe set, a plurality of through holes are formed in the flow uniformizing plate, and the flow uniformizing plate is arranged in the horizontal pipe set. The multiple through holes are distributed in the flow uniformizing plate at intervals. According to the utility model, the abrasion of flue gas to the pipelines of the horizontal pipe group or the vertical pipe group can be reduced, the impact pressure of soot blowing steam to the pipelines of the horizontal pipe group or the vertical pipe group can be weakened, the blowing damage to the pipelines is reduced, and the safe and stable operation of the unit is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers, and in particular relates to a soot blowing channel heating surface protection device and a boiler. Background Art

[0002] The primary superheater, reheater and economizer are located at the rear of the vertical shaft at the rear of the boiler. The primary superheater, reheater and economizer are composed of a horizontal inlet pipe group and a suspended outlet pipe group. A soot blower is usually installed at the rear of the boiler to remove the ash accumulated on the heating surface of the tube group.

[0003] In the related technology, the horizontal inlet tube group of the first-stage superheater is fixed on the tube clamp of the economizer suspension tube, and an angle is formed between the horizontal inlet tube and the suspension tube. The protective tile cannot effectively protect the tube group. During the operation of the soot blower, it is easy to cause thinning, deformation and other blowing damage to the pipe at the angle; the fixed tube clamps of the horizontal tube group of the reheater are fixed in a row, and the tube clamps are vertical wide plates. During the operation of the soot blower, the jet is refracted onto the heating surface pipe through the fixed tube clamps. The soot blower is close to the heating surface, and the soot blowing pressure is too high, which leads to deformation, thinning and other blowing damage to the heating surface, affecting the safe and stable operation of the unit. Summary of the invention

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model proposes a sootblowing channel heating surface protection device, which can protect the tube group and is conducive to the safe and stable operation of the unit.

[0005] The embodiment of the utility model also provides a boiler.

[0006] The sootblowing channel heating surface protection device of the utility model embodiment forms a sootblowing channel between the tube groups in the boiler, and the tube groups include horizontal tube groups; the sootblowing channel heating surface protection device includes a flow equalizer, which is arranged at the corner of the heating surface in the sootblowing channel, and the flow equalizer extends along the length direction of the sootblowing channel, and the flow equalizer and the horizontal tube group are arranged at an angle, and a plurality of through holes are arranged on the flow equalizer, and the plurality of through holes are distributed at intervals on the flow equalizer.

[0007] In this embodiment, a flow equalizer is provided at the corner of the heated surface in the sootblowing channel. The flow equalizer can block the flue gas and the sootblowing steam blown out by the sootblower, thereby dispersing the flue gas and reducing the flow rate of the flue gas, thereby reducing the wear of the flue gas on the horizontal pipe group. At the same time, it can also weaken the impact pressure of the sootblowing steam on the pipes of the horizontal pipe group, reduce the blowing damage to the pipes, and facilitate the safe and stable operation of the unit.

[0008] In this embodiment, the horizontal tube group is divided into a first horizontal tube group and a second horizontal tube group, the first horizontal tube group is a horizontal tube group of a primary superheater, and the second horizontal tube group is a horizontal tube group of a reheater.

[0009] In this embodiment, the tube group also includes a suspension pipe of the economizer, and the corners in the soot blowing channel include the angle between the first horizontal tube group and the suspension pipe and the angle between the horizontal pipe of the second horizontal tube group and the pipe clamp of the second horizontal tube group.

[0010] In this embodiment, the angle between the flow equalizer and the horizontal tube group is α, 30°≤α≤45°.

[0011] In this embodiment, the sootblowing channel heating surface protection device further includes protection tiles, and the protection tiles are arranged on the heating surface of the horizontal tube group pipeline.

[0012] In this embodiment, the flow equalizer is connected to the protective tile.

[0013] In this embodiment, the diameter of the through hole is D, 20 mm ≤ D ≤ 60 mm.

[0014] In this embodiment, the thickness of the flow equalizer plate is 2 mm to 4 mm.

[0015] In this embodiment, the distance between two adjacent through holes is L, and 20 mm ≤ L ≤ 60 mm.

[0016] A boiler comprises the above-mentioned sootblowing channel heating surface protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a heating surface protection device for a sootblowing channel in a primary superheater according to an embodiment of the utility model.

[0018] Figure 2 It is a schematic structural diagram of a heating surface protection device of a sootblowing channel in a reheater according to an embodiment of the utility model.

[0019] Figure 3 It is a structural schematic diagram of a flow equalizer plate of a heating surface protection device for a sootblowing channel according to an embodiment of the utility model.

[0020] Reference numerals:

[0021] 100. Soot blower;

[0022] 1. Pipe group; 11a. First horizontal pipe group; 11b. Second horizontal pipe group; 11b1. Pipe clamp of first horizontal pipe group; 12. Suspension pipe; 2. Flow equalizer; 21. Through hole; 3. Soot blowing channel. DETAILED DESCRIPTION

[0023] The 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 cannot be understood as limiting the present invention.

[0024] In the soot blowing channel heating surface protection device of this embodiment, Figures 1 to 3 As shown, a sootblowing channel 3 is formed between the tube groups 1 in the boiler, and the tube group 1 includes a horizontal tube group; the sootblowing channel heating surface protection device includes a flow equalizer 2, and the flow equalizer 2 is arranged at the corner of the heating surface in the sootblowing channel 3, and the flow equalizer 2 extends along the length direction of the sootblowing channel 3, and the flow equalizer 2 and the horizontal tube group are arranged at an angle, and a plurality of through holes 21 are arranged on the flow equalizer 2, and the plurality of through holes 21 are distributed at intervals on the flow equalizer 2.

[0025] Specifically, a soot blower 100 is provided in the soot blowing channel 3 of the boiler. For example, the soot blower 100 is a steam soot blower. The steam soot blower uses the high-speed jet impact force of superheated steam to remove the soot on the heating surface. Regular use of the soot blower 100 to timely remove the accumulated soot on the heating surface is conducive to the safe and economical operation of the boiler. The installation method of the soot blower 100 is a conventional prior art and will not be described in detail here. Since the nozzle of the soot blower 100 moves along the length direction of the soot blowing channel 3, the flow equalizer 2 is arranged at the corner of the heating surface in the soot blowing channel 3. The corner here refers to the corner extending along the length direction of the soot blowing channel 3.

[0026] For example, the flow plate 2 is a stainless steel flow plate, which is resistant to steam corrosion and is conducive to improving the service life of the flow plate. Furthermore, the flow plate 2 can be 304 stainless steel, which is resistant to high temperatures and has good processing performance. Of course, the flow plate 2 can also be set to other materials as long as it meets the requirements for use in the boiler, and there is no limitation here.

[0027] It can be understood that by arranging the flow equalizer 2 at the corner in the sootblowing channel 3, the flow equalizer 2 can play a role in blocking the flue gas and the sootblowing steam blown out by the sootblower 100, thereby dispersing the flue gas, reducing the flow rate of the flue gas, and reducing the wear of the flue gas on the pipes of the horizontal pipe group. At the same time, it can also weaken the impact pressure of the sootblowing steam on the pipes of the horizontal pipe group, reduce the blowing damage to the pipes, and facilitate the safe and stable operation of the unit.

[0028] In this embodiment, if Figure 1 and Figure 2 As shown, the horizontal tube group is divided into a first horizontal tube group 11a and a second horizontal tube group 11b. The first horizontal tube group 11a is a horizontal tube group of a primary superheater, and the second horizontal tube group 11b is a horizontal tube group of a reheater.

[0029] It can be understood that the primary superheater and reheater are both located at the rear of the vertical shaft at the rear of the boiler, and both the primary superheater and reheater include horizontal tube groups, and soot blowing channels 3 are provided between the horizontal tube groups of the primary superheater and the horizontal tube groups of the reheater, and soot blowers 100 are provided in the soot blowing channels 3. Therefore, a flow equalizer 2 is provided in the soot blowing channels 3 between the first horizontal tube groups 11a, so that the pipes corresponding to the soot blowing channels 3 between the first horizontal tube groups 11a can be protected; a flow equalizer 2 is provided in the soot blowing channels 3 between the second horizontal tube groups 11b, so that the pipes corresponding to the soot blowing channels 3 between the second horizontal tube groups 11b can be protected. Of course, the horizontal tube group can also be a horizontal tube group of other components in the boiler that form the soot blowing channels 3, which is not limited here.

[0030] In this embodiment, if Figure 1 As shown, the tube group 1 also includes a hanging pipe 12 of the economizer, and the corners in the soot blowing channel 3 include the angle between the first horizontal tube group 11a and the hanging pipe 12 and the angle between the horizontal pipe of the first horizontal tube group 11b and the pipe clamp 11b1 of the first horizontal tube group.

[0031] Specifically, the pipe of the first horizontal pipe group 11a is a first serpentine pipe, and there are multiple first serpentine pipes of the first horizontal pipe group 11a, and the multiple first serpentine pipes are arranged at intervals along the width direction of the boiler. The horizontal pipe section of the first serpentine pipe is overlapped on the pipe clamp of the suspension pipe 12 of the economizer, so that an angle is formed between the horizontal pipe section of the first serpentine pipe and the suspension pipe 12 of the economizer. The pipe of the first horizontal pipe group 11b is a second serpentine pipe, and there are multiple first serpentine pipes of the first horizontal pipe group 11b, and the multiple second serpentine pipes are arranged at intervals along the width direction of the boiler. The fixed pipe clamp of the second serpentine pipe is a continuous fixed type, and the fixed pipe clamp is a vertical wide plate, that is, the horizontal pipe section of the second serpentine pipe is clamped between two vertical wide plates, and an angle is formed between the horizontal pipe section of the second serpentine pipe and the vertical wide plate.

[0032] It should be noted that in the actual production process, the pipes are severely damaged at the angle between the first horizontal pipe group 11a and the suspension pipe 12 of the economizer in the boiler, and at the angle between the horizontal pipe of the first horizontal pipe group 11b and the pipe clamp 11b1 of the first horizontal pipe group. Therefore, by arranging the flow equalizer 2 at the angles of these positions, the pipes can be protected in a targeted manner and the protection efficiency can be improved.

[0033] In this embodiment, if Figure 1 and Figure 2 As shown, the angle between the flow equalizer plate 2 and the horizontal tube group is α, 30°≤α≤45°.

[0034] For example, α may be 30°, 35°, 38°, 40°, 42° or 45°, etc. If α is too large or too small, both the protection effect on the pipeline and the sootblowing effect of the sootblower 100 on the pipeline will be affected.

[0035] Specifically, Figure 1 As shown, in the primary superheater, the angle between the flow plate 2 and the horizontal tube group refers to the angle between the flow plate 2 and the horizontal section of the first horizontal tube group 11a. Figure 2 As shown, in the reheater, the angle between the flow plate 2 and the horizontal tube group refers to the angle between the flow plate 2 and the horizontal section of the second horizontal tube group 11b.

[0036] By setting the angle α between the flow plate 2 and the horizontal tube group to 30°≤α≤45°, the flow blocking effect can be better achieved, effectively reducing the blowing damage of the soot blowing steam to the angle in the soot blowing channel 3, and at the same time reducing the dust accumulation on the flow plate 2.

[0037] In this embodiment, if Figure 3 As shown, the diameter of the through hole 21 is D, 20 mm ≤ D ≤ 60 mm.

[0038] For example, the aperture D of the through hole 21 may be 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm or 60 mm, etc. If the aperture D of the through hole 21 is too large or too small, it is not conducive to the protection of the pipeline.

[0039] In this embodiment, by setting the aperture D of the through hole 21 to 20 mm to 60 mm, the steam flow can be effectively blocked while allowing sufficient steam to pass through the through hole 21 for soot blowing, thereby effectively reducing the blowing loss of the pipeline and reducing the dust accumulation on the pipeline and the flow plate 2.

[0040] In this embodiment, the thickness of the flow equalizer plate 2 is 2 mm to 4 mm.

[0041] For example, the thickness H of the flow plate 2 can be 2mm, 2.2mm, 2.5mm, 2.7mm, 3.0mm, 3.3mm, mm, 3.5mm, 3.8mm or 4mm. If the thickness of the flow plate 2 is too large, it is heavy and inconvenient to install, and the cost is high. If the thickness of the flow plate 2 is too small, it is easy to deform.

[0042] In this embodiment, by setting the thickness of the flow equalizer plate 2 to 2 mm to 4 mm, the flow equalizer plate 2 can have a certain strength and be easy to install, thereby better meeting the use requirements.

[0043] In this embodiment, the sootblowing channel heating surface protection device further includes protection tiles (not shown in the figure), which are arranged on the heating surface of the horizontal tube group pipeline.

[0044] Specifically, the protective tile is a semicircular arc plate, which is clamped on the pipeline through the opening of the protective tile. The protective tile is a conventional prior art, and its specific installation method is not described in detail here.

[0045] It can be understood that further protecting the pipeline by means of protective tiles is helpful to improve the protective effect of the pipeline.

[0046] In this embodiment, the flow plate 2 is connected to the protective tile.

[0047] For example, the flow plate 2 is connected to the protective tile by spot welding. By spot welding the protective tile and the flow plate 2, the processing efficiency can be improved, and the spot welding does not require the use of welding wire or other metal filling materials, which reduces the welding cost and also avoids solder contamination of the pipeline.

[0048] By connecting the flow plate 2 to the protective tile, the installation of the flow plate 2 can be facilitated, and the flow plate 2 does not need to be connected to the pipeline, and the installation of the flow plate 2 will not cause damage to the pipeline.

[0049] This embodiment also provides a boiler, including the above-mentioned sootblowing channel heating surface protection device.

[0050] It can be understood that by setting the above-mentioned sootblowing channel heating surface protection device in the boiler and setting a flow equalizer 2 at the corner in the sootblowing channel 3, the flow equalizer 2 can play a role in blocking the flue gas and the sootblowing steam blown out by the sootblower 100, thereby dispersing the flue gas, reducing the flow rate of the flue gas, and reducing the wear of the flue gas on the pipes of the horizontal pipe group. At the same time, it can also weaken the impact pressure of the sootblowing steam on the pipes of the horizontal pipe group, reduce the blowing damage to the pipes, which is beneficial to the safe and stable operation of the unit, and further beneficial to increasing the service life of the boiler.

[0051] In the description of the present invention, it should 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 a limitation on the present invention.

[0052] 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 utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] 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.

[0054] In the present utility model, 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.

[0055] In the present utility model, 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 utility model. 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.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A sootblowing channel heating surface protection device, characterized in that: A soot blowing channel is formed between the tube groups in the boiler, and the tube groups include horizontal tube groups; the soot blowing channel heating surface protection device includes: A flow equalizer plate is arranged at a corner of the heated surface in the soot blowing channel, and the flow equalizer plate extends along the length direction of the soot blowing channel. The flow equalizer plate and the horizontal tube group are arranged at an angle, and a plurality of through holes are arranged on the flow equalizer plate, and the plurality of through holes are distributed at intervals on the flow equalizer plate.

2. The sootblowing channel heating surface protection device according to claim 1, characterized in that: The horizontal tube group is divided into a first horizontal tube group and a second horizontal tube group, the first horizontal tube group is a horizontal tube group of a primary superheater, and the second horizontal tube group is a horizontal tube group of a reheater.

3. The sootblowing channel heating surface protection device according to claim 2, characterized in that: The tube group also includes a suspension pipe of the economizer, and the corners in the soot blowing channel include an angle between the first horizontal tube group and the suspension pipe and an angle between the horizontal pipe of the second horizontal tube group and the pipe clamp of the second horizontal tube group.

4. The sootblowing channel heating surface protection device according to claim 1, characterized in that: The angle between the flow equalizer plate and the horizontal tube group is α, 30°≤α≤45°.

5. The sootblowing channel heating surface protection device according to claim 1, characterized in that: It also includes protective tiles, which are arranged on the heating surface of the horizontal tube group pipeline.

6. The sootblowing channel heating surface protection device according to claim 5, characterized in that: The flow equalizer is connected to the protective tile.

7. The sootblowing channel heating surface protection device according to any one of claims 1 to 6, characterized in that: The aperture of the through hole is D, 20mm≤D≤60mm.

8. The sootblowing channel heating surface protection device according to any one of claims 1 to 6, characterized in that: The thickness of the flow equalizer plate is 2 mm to 4 mm.

9. The sootblowing channel heating surface protection device according to any one of claims 1 to 6, characterized in that: The distance between two adjacent through holes is L, 20mm≤L≤60mm.

10. A boiler, characterized in that: The invention comprises the sootblowing channel heating surface protection device according to any one of claims 1 to 9.

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