CN215000102U - Hierarchical tuber pipe elbow of reinforcing boiler buggy burnout rate - Google Patents
Hierarchical tuber pipe elbow of reinforcing boiler buggy burnout rate Download PDFInfo
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- CN215000102U CN215000102U CN202121282602.2U CN202121282602U CN215000102U CN 215000102 U CN215000102 U CN 215000102U CN 202121282602 U CN202121282602 U CN 202121282602U CN 215000102 U CN215000102 U CN 215000102U
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Abstract
The utility model discloses a graded air pipe elbow for enhancing the pulverized coal burnout rate of a boiler, which comprises a graded air pipe and an inner spray pipe; the grading air pipe comprises a lower inclined straight pipe, a middle bent pipe and an upper straight pipe which are integrally formed; the inner spray pipe and the lower oblique straight pipe have the same structure but the pipe diameter is smaller than that of the lower oblique straight pipe, the inner spray pipe is sleeved in the lower oblique straight pipe, the bottom end of the inner spray pipe is overlapped with the end face of the bottom end of the lower oblique straight pipe, and the top end of the inner spray pipe extends into the middle bent pipe; the two ends of the lower inclined straight pipe and the inner spray pipe are respectively welded through a plurality of supporting plates, a refractory burning material is filled between the lower inclined straight pipe and the inner spray pipe, and the top end of the lower inclined straight pipe and the inner spray pipe are plugged by full welding of an annular steel plate. Adopt the utility model provides a boiler classifying air elbow can solve elbow and interior sleeve pipe scaling loss deformation and lead to the problem that breaks away from, and can effectively improve the combustion performance of boiler, guarantees boiler equipment's safe operation.
Description
Technical Field
The utility model relates to a boiler equipment field, in particular to hierarchical tuber pipe elbow of reinforcing boiler buggy burnout rate.
Background
The existing boiler is designed to use anthracite as fuel, adopts a double-inlet double-outlet positive pressure direct-blowing powder making system and a W flame combustion mode, and is provided with 28 grading air pipes, wherein 4 grading air elbows at four corners of the boiler form 90 degrees with a boiler wall, and the installation angles of the rest 24 grading air elbows are changed from 90 degrees to 70 degrees.
From the analysis of the operation condition of the existing boiler, although the rigidity of the classifying air is enhanced by 24 classifying air bends of 70 degrees, the flame center of a hearth moves upwards, the temperature of the lower part of the hearth is reduced, the heating surface of the lower part is not fully utilized, the combustion range of pulverized coal is short, and the pulverized coal falls into a cold ash hopper under the condition of not burning out. In addition, because the equipment is in a high-temperature environment for a long time, the elbow and the inner sleeve close to the nozzle are seriously burnt, deformed and even fallen off, the strength of the graded air flow is weak, the firing range is insufficient, the air required by burning off cannot be effectively supplemented, and the downward-jet flame cannot be lifted, so that the content of fly ash and slag is increased, and the combustion of the boiler is reduced; and the heated surface is directly thinned after being washed by the air-powder mixture, thereby bringing serious potential safety hazard to boiler equipment.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a hierarchical tuber pipe elbow of reinforcing boiler buggy burnout rate can effectively solve the problem in the background art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a graded air pipe elbow for enhancing the burn-out rate of pulverized coal of a boiler comprises a graded air pipe (1) and an inner spray pipe (2); the grading air pipe (1) comprises a lower inclined straight pipe (11), a middle bent pipe (12) and an upper straight pipe (13) which are integrally formed; the inner spray pipe (2) and the lower inclined straight pipe (11) have the same structure but the pipe diameter is smaller than that of the lower inclined straight pipe (11), the inner spray pipe (2) is sleeved in the lower inclined straight pipe (11), the bottom end of the inner spray pipe (2) is overlapped with the end face of the bottom end of the lower inclined straight pipe (11), and the top end of the inner spray pipe (2) extends into the middle bent pipe (12); the two ends of the lower inclined straight pipe (11) and the inner spray pipe (2) are respectively welded through a plurality of supporting plates (3), a refractory burning material is filled between the lower inclined straight pipe (11) and the inner spray pipe (2), and the top end of the lower inclined straight pipe (11) and the inner spray pipe (2) are plugged by full welding through an annular steel plate (4).
Preferably, the bottom end of a lower inclined straight pipe (11) is welded on the outer wall of the boiler, the tail end of an upper straight pipe (13) is welded with a cooling air box, the bottom end plane of the lower inclined straight pipe (11) is perpendicular to the tail end plane of the upper straight pipe (13), and the top end of the upper straight pipe (13) is vertically upward after the bottom end of the lower inclined straight pipe (11) is welded with the boiler.
Preferably, the lower inclined straight pipe (11), the middle bent pipe (12) and the upper straight pipe (13) are all in the specification
I.e. the inner wall of the tube has a diameter of 580mm and a wall thickness of 10 mm.
Preferably, if the bottom end of the lower inclined straight pipe (11) is parallel to the X axis, the radial direction of the lower inclined straight pipe (11) is 55 degrees to the X axis direction and 35 degrees to the Y axis direction, the longest part of the pipe body of the lower inclined straight pipe (11) is 929.68, and the shortest part is 519.44; the radian of the middle bent pipe (12) is 55 degrees, the vertical distance between the tail end of the middle bent pipe (12) and the Y axis is 878mm, and the vertical distance between the middle position of the tail end of the middle bent pipe (12) and the X axis is 800 mm; the opening at the tail end of the upper straight pipe (13) is parallel to the X-axis direction, the length of the pipe is 150mm, and the vertical distance between the middle position of the tail end of the upper straight pipe (13) and the X-axis is also 800 mm.
Preferably, the inner nozzle (2) has a specification of
Namely, the diameter of the inner wall of the pipe is 426mm, and the wall thickness is 10 mm; the inner spray pipe (2) is sleeved on the inner side of the lower inclined straight pipe (11), the bottom end face of the inner spray pipe (2) is overlapped with the bottom end face of the lower inclined straight pipe (11), the overlapped face is taken as an X axis, and the radial direction of the inner spray pipe (2) is 55 degrees with the X axis direction and is 35 degrees with the Y axis direction; the longest part of the pipe body of the inner spray pipe (2) is 936.28, and the shortest part is 634.97。
Preferably, four support plates (3) are respectively and uniformly and symmetrically welded at the upper end and the lower end of the lower inclined straight pipe (11) and the inner spray pipe (2), the plate surfaces of the support plates (3) are radially parallel to the pipe, and the size of each support plate (3) is 100 x 75 x 6 mm.
Preferably, the thickness of the annular steel plate (4) is 6 mm.
Compared with the prior art, the utility model discloses following beneficial effect has: adopt the utility model provides a boiler classifying air elbow can solve elbow and interior sleeve pipe scaling loss deformation and lead to the problem that breaks away from, and can effectively improve the combustion performance of boiler, guarantees boiler equipment's safe operation.
Drawings
FIG. 1 is a sectional view of a graded air pipe elbow for enhancing the burnout rate of the pulverized coal in a boiler according to the present invention;
FIG. 2 is a schematic view of a classifying air duct;
FIG. 3 is a schematic view of an inner nozzle;
FIG. 4 is a sectional view of a staged air elbow of a boiler, wherein the direction A is a schematic bottom section of a lower inclined straight pipe, and the direction B is a schematic top section of the lower inclined straight pipe.
In the figure: 1. grading air pipes; 2. an inner nozzle; 3. a support plate; 4. an annular steel plate; 11. a lower inclined straight pipe; 12. a middle bent pipe; 13. and (4) feeding a straight pipe.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-4, a graded air pipe elbow for enhancing the coal powder burnout rate of a boiler comprises a graded air pipe 1 and an inner spray pipe 2. The grading air pipe 1 comprises a lower inclined straight pipe 11, a middle bent pipe 12 and an upper straight pipe 13 which are integrally formed; the inner spray pipe 2 has the same structure as the lower inclined straight pipe 11 of the grading air pipe 1, the pipe diameter of the inner spray pipe 2 is smaller than that of the lower inclined straight pipe 11, the inner spray pipe 2 is sleeved in the lower inclined straight pipe 11 of the grading air pipe 1, the bottom end of the inner spray pipe 2 is overlapped with the end face of the bottom end of the grading air pipe 1, and the top end of the inner spray pipe 2 extends into the middle bent pipe 12; the lower oblique straight pipe 11 of the grading air pipe 1 is welded with the two ends of the inner spray pipe 2 through the support plates 3, a fireproof sintering material is filled between the lower oblique straight pipe 11 of the grading air pipe 1 and the inner spray pipe 2, and the top end of the lower oblique straight pipe 11 of the grading air pipe 1 and the inner spray pipe 2 are plugged through full welding of the annular steel plate 4.
Specifically, the grading air pipe 1 is an arc-shaped pipe with openings at two ends, and specifically comprises a lower inclined straight pipe 11, a middle bent pipe 12 and an upper straight pipe 13 which are integrally formed, wherein the bottom end of the lower inclined straight pipe 11 is welded on the outer wall of the boiler, the tail end of the upper straight pipe 13 is welded with a cooling air box, the plane of the bottom end of the lower inclined straight pipe 11 is perpendicular to the plane of the tail end of the upper straight pipe 13, and the top end of the arc-shaped pipe is ensured to be vertically upward after the boiler is welded at the bottom end;
in the embodiment of the application, the specifications of the lower inclined straight pipe 11, the middle bent pipe 12 and the upper straight pipe 13 in the classifying air pipe 1 are phi 580mm × 10, that is, the inner wall diameter of the pipe is 580mm, the wall thickness is 10mm, and the material can be 1Cr20Ni14Si 2. Assuming that the bottom end of the lower inclined straight pipe 11 is parallel to the X axis, the radial direction of the lower inclined straight pipe 11 is 55 degrees with the X axis direction and 35 degrees with the Y axis direction, the longest part of the pipe body of the lower inclined straight pipe 11 is 929.68, and the shortest part is 519.44; the radian of the middle bent pipe 12 is 55 degrees, the vertical distance between the tail end of the middle bent pipe 12 and the Y axis is 878mm, and the vertical distance between the middle position of the tail end of the middle bent pipe 12 and the X axis is 800 mm; the opening at the tail end of the upper straight pipe 13 is parallel to the X-axis direction, the length of the pipe is 150mm, and the vertical distance between the middle position of the tail end of the upper straight pipe 13 and the X-axis is also 800 mm.
The inner spray pipe 2 has the same structure as the lower inclined straight pipe 11 of the grading air pipe 1, but the size of the inner spray pipe is smaller than that of the lower inclined straight pipe 11. Specifically, the specification of the inner spray pipe 2 is phi 426mm multiplied by 10, namely the inner wall diameter of the pipe is 426mm, the wall thickness is 10mm, and the material can be ZG8Cr26NiMn 3N; the inner spray pipe 2 is sleeved on the inner side of the lower inclined straight pipe 11, the bottom end face of the inner spray pipe 2 is overlapped with the bottom end face of the lower inclined straight pipe 11, the overlapped face is taken as an X axis, and the radial direction of the inner spray pipe 2 and the X axis direction are 55 degrees and 35 degrees respectively; the longest part of the pipe body of the inner spray pipe 2 is 936.28, and the shortest part is 634.97, so that after the inner spray pipe 2 is sleeved inside the grading air pipe 1, the top end of the inner spray pipe 2 extends out of the lower inclined straight pipe 11 of the grading air pipe 1 and enters the middle bent pipe 12.
The lower inclined straight pipe 11 of the grading air pipe 1 is welded with the two ends of the inner spray pipe 2 through a plurality of support plates 3 respectively, the support plates 3 are welded between the inner wall of the grading air pipe 1 and the outer wall of the inner spray pipe 2, and the surfaces of the support plates 3 are parallel to the diameter direction of the pipe; preferably, four support plates 3, namely eight support plates 3 in total, are uniformly and symmetrically welded on the lower inclined straight pipe 11 of the classifying air duct 1 and the upper end and the lower end of the inner spray pipe 2 respectively, and the size of each support plate 3 is 100 × 75 × 6 mm.
Filling refractory burning materials such as refractory plastics and the like in an annular cavity formed by the inner wall of a lower inclined straight pipe 11 of the grading air pipe 1 and the outer wall of the inner spray pipe 2; between the top of a lower inclined straight pipe 11 of the grading air pipe 1 and the outer wall of the upper end of the inner spray pipe 2, an annular steel plate 4 is used for full-welding plugging, the surface of the annular steel plate 4 is overlapped with the end surface of the top of the lower inclined straight pipe 11, and only the top is welded and only the inner wall is welded during welding; preferably, the thickness of the annular steel plate 4 is 6mm, and the material can be 1Cr20Ni14Si 2.
The utility model provides a when boiler classifying air elbow is being applied to boiler equipment, generally need design 24 classifying air elbows and 4 90 elbows of boiler four corners installation, 24 classifying air elbows are 55 with the water-cooling wall contained angle, and the export of classifying air elbow and water-cooling wall central line parallel and level, and the classifying air elbow is 82mm with water-cooling wall hole clearance all around.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A graded air pipe elbow for enhancing the burn-out rate of pulverized coal of a boiler is characterized by comprising a graded air pipe (1) and an inner spray pipe (2); the grading air pipe (1) comprises a lower inclined straight pipe (11), a middle bent pipe (12) and an upper straight pipe (13) which are integrally formed; the inner spray pipe (2) and the lower inclined straight pipe (11) have the same structure but the pipe diameter is smaller than that of the lower inclined straight pipe (11), the inner spray pipe (2) is sleeved in the lower inclined straight pipe (11), the bottom end of the inner spray pipe (2) is overlapped with the end face of the bottom end of the lower inclined straight pipe (11), and the top end of the inner spray pipe (2) extends into the middle bent pipe (12); the two ends of the lower inclined straight pipe (11) and the inner spray pipe (2) are respectively welded through a plurality of supporting plates (3), a refractory burning material is filled between the lower inclined straight pipe (11) and the inner spray pipe (2), and the top end of the lower inclined straight pipe (11) and the inner spray pipe (2) are plugged by full welding through an annular steel plate (4).
2. The classifying air pipe elbow according to claim 1, wherein the bottom end of the lower straight pipe (11) is welded to the outer wall of the boiler, the end of the upper straight pipe (13) is welded to the cooling air box, the bottom end plane of the lower straight pipe (11) is perpendicular to the end plane of the upper straight pipe (13), and the top end of the upper straight pipe (13) is vertically upward after the bottom end of the lower straight pipe (11) is welded to the boiler.
3. A graded air pipe bend according to claim 1, characterised in that the dimensions of the lower oblique straight pipe (11), the middle bent pipe (12) and the upper straight pipe (13) are phi 580mm x 10, i.e. the inner wall diameter of the pipe is 580mm and the wall thickness is 10 mm.
4. The graded air pipe bend according to claim 1, wherein if the bottom end of the lower oblique straight pipe (11) is parallel to the X-axis, the radial direction of the lower oblique straight pipe (11) is 55 ° to the X-axis direction and 35 ° to the Y-axis direction, the longest part of the pipe body of the lower oblique straight pipe (11) is 929.68, and the shortest part is 519.44; the radian of the middle bent pipe (12) is 55 degrees, the vertical distance between the tail end of the middle bent pipe (12) and the Y axis is 878mm, and the vertical distance between the middle position of the tail end of the middle bent pipe (12) and the X axis is 800 mm; the opening at the tail end of the upper straight pipe (13) is parallel to the X-axis direction, the length of the pipe is 150mm, and the vertical distance between the middle position of the tail end of the upper straight pipe (13) and the X-axis is also 800 mm.
5. The graded air pipe elbow as claimed in claim 1, characterised in that the internal lance (2) has a specification of phi 426mm x 10, i.e. the inner wall of the pipe has a diameter of 426mm and a wall thickness of 10 mm; the inner spray pipe (2) is sleeved on the inner side of the lower inclined straight pipe (11), the bottom end face of the inner spray pipe (2) is overlapped with the bottom end face of the lower inclined straight pipe (11), the overlapped face is taken as an X axis, and the radial direction of the inner spray pipe (2) is 55 degrees with the X axis direction and is 35 degrees with the Y axis direction; the longest part of the pipe body of the inner spray pipe (2) is 936.28, and the shortest part is 634.97.
6. The classifying air pipe elbow according to claim 1, wherein four support plates (3) are welded uniformly and symmetrically to the upper and lower ends of the lower inclined straight pipe (11) and the inner nozzle (2), respectively, and the plate surfaces of the support plates (3) are radially parallel to the pipe, and the size of the support plates (3) is 100 x 75 x 6 mm.
7. A graded air pipe bend according to claim 1, characterised in that the thickness of the annular steel plate (4) is 6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121282602.2U CN215000102U (en) | 2021-06-09 | 2021-06-09 | Hierarchical tuber pipe elbow of reinforcing boiler buggy burnout rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121282602.2U CN215000102U (en) | 2021-06-09 | 2021-06-09 | Hierarchical tuber pipe elbow of reinforcing boiler buggy burnout rate |
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| Publication Number | Publication Date |
|---|---|
| CN215000102U true CN215000102U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121282602.2U Active CN215000102U (en) | 2021-06-09 | 2021-06-09 | Hierarchical tuber pipe elbow of reinforcing boiler buggy burnout rate |
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| CN (1) | CN215000102U (en) |
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2021
- 2021-06-09 CN CN202121282602.2U patent/CN215000102U/en active Active
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