CN212430842U - Circulating fluidized bed boiler - Google Patents
Circulating fluidized bed boiler Download PDFInfo
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- CN212430842U CN212430842U CN202020661252.XU CN202020661252U CN212430842U CN 212430842 U CN212430842 U CN 212430842U CN 202020661252 U CN202020661252 U CN 202020661252U CN 212430842 U CN212430842 U CN 212430842U
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- fluidized bed
- wear
- circulating fluidized
- fins
- bed boiler
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Abstract
The utility model discloses a circulating fluidized bed boiler, which comprises a plurality of water wall tubes, a plurality of connecting plates and a plurality of first anti-abrasion fins; the two adjacent water wall tubes are connected through the connecting plate, the first anti-abrasion fins are strip-shaped structural members, the extending direction of the strip-shaped structural members is the same as the axis direction of the water wall tubes, the connecting plate is perpendicular to the first anti-abrasion fins, expansion joints are formed in the first anti-abrasion fins, the expansion joints penetrate towards one side of the connecting plate, and the extending direction of the expansion joints is perpendicular to the extending direction of the strip-shaped structures. The scheme can solve the problem of low safety of the circulating fluidized bed boiler.
Description
Technical Field
The utility model relates to a boiler manufacture technical field especially relates to a circulating fluidized bed boiler.
Background
The circulating fluidized bed boiler has the advantages of strong fuel adaptability, high combustion efficiency, less generated pollutants and the like, so that the circulating fluidized bed boiler is widely applied.
However, when the circulating fluidized bed boiler is in operation, solid particles on the surface of a water wall of the boiler flow back downwards, and the solid particles directly impact the surface of the water wall, or the solid particles form local vortex, so that the solid particles and the surface of the water wall are in severe friction, the water wall is abraded, the heating surface of the water wall is reduced, the pipe explosion accident of the circulating fluidized bed boiler is easily caused, and the safety of the circulating fluidized bed boiler is further reduced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a circulating fluidized bed boiler to solve the lower problem of circulating fluidized bed boiler's security.
In order to solve the above problem, the utility model adopts the following technical scheme:
a circulating fluidized bed boiler comprises a plurality of water wall tubes, a plurality of connecting plates and a plurality of first anti-abrasion fins;
the two adjacent water wall tubes are connected through the connecting plate, the first anti-abrasion fins are strip-shaped structural members, the extending direction of the strip-shaped structural members is the same as the axis direction of the water wall tubes, the connecting plate is perpendicular to the first anti-abrasion fins, expansion joints are formed in the first anti-abrasion fins, the expansion joints penetrate towards one side of the connecting plate, and the extending direction of the expansion joints is perpendicular to the extending direction of the strip-shaped structures.
The utility model discloses a technical scheme can reach following beneficial effect:
the utility model discloses an in the circulating fluidized bed boiler, be connected through the connecting plate between two adjacent water wall pipes, the connecting plate is mutually perpendicular with first abrasionproof fin, in this scheme, the in-process of solid particle whereabouts, solid particle and first abrasionproof fin collision, thereby the flow velocity of solid particle has been slowed down, simultaneously first abrasionproof fin separates two adjacent water wall pipes, thereby the density of the solid particle that the surface that has reduced the water wall pipe can contact, therefore the wearing and tearing that the surface of water wall pipe received reduce.
Meanwhile, the expansion joint is formed in the first abrasion-proof fin, the first abrasion-proof fin can be divided into two plate sections by the expansion joint, and an extension space is reserved between the two plate sections, so that internal stress generated after the first abrasion-proof fin is heated can be eliminated, the first abrasion-proof fin is prevented from being deformed or falling, and the safety of the circulating fluidized bed boiler is improved.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
FIG. 1 is a partial view of a circulating fluidized bed boiler according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of a circulating fluidized bed boiler according to an embodiment of the present invention;
fig. 3 is a front view of a first wear fin in a circulating fluidized bed boiler according to an embodiment of the present invention.
Description of reference numerals:
100-water wall tubes,
200-a connecting plate,
300-first anti-wear fins, 310-expansion gaps,
400-second anti-wear fins.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 3, an embodiment of the present invention discloses a circulating fluidized bed boiler, which may specifically include a plurality of water wall tubes 100, a plurality of connection plates 200, and a plurality of first anti-wear fins 300.
Two adjacent water wall tubes 100 are connected through a connecting plate 200, the water wall tubes 100 and the connecting plate 200 are both located in a hearth of the circulating fluidized bed boiler, the surfaces of the water wall tubes 100 and the surfaces of the connecting pipes are both heating surfaces, and the water wall tubes 100 absorb heat in the hearth, so that media in the water wall tubes 100 are heated. The first wear fin 300 is a strip-shaped structure, which may be a rectangular plate, although other structures may be used, and are not limited herein. The extending direction of the strip-shaped structural member is the same as the axial direction of the water wall tube 100, the connecting plate 200 is perpendicular to the first anti-wear fins 300, expansion joints 310 are formed in the first anti-wear fins 300, the expansion joints 310 penetrate towards one side of the connecting plate 200, at the moment, the expansion joints 310 divide the first anti-wear fins 300 into two plate sections, and the extending direction of the expansion joints 310 is perpendicular to the extending direction of the strip-shaped structural member.
Optionally, the water wall tube 100 is welded to the connecting plate 200, the connecting plate 200 is welded to the first anti-wear fin 300, the water wall tube 100 may be made of a steel tube, and the connecting plate 200 and the first anti-wear fin 300 may be made of a steel plate.
The utility model discloses an in-process, at the solid particle whereabouts, the solid particle collides with first abrasionproof fin 300 to slowed down the flow velocity of solid particle, first abrasionproof fin 300 separates two adjacent water wall tubes 100 simultaneously, thereby reduced the density of the solid particle that the surface of water wall tube 100 can contact, consequently the wearing and tearing that the surface of water wall tube 100 received reduce.
Because the first anti-wear fin 300 is easy to deform after being heated, the first anti-wear fin 300 can be provided with an expansion slit 310, the expansion slit 310 can divide the first anti-wear fin 300 into two plate sections, and an extension space is reserved between the adjacent plate sections, so that the internal stress generated after the first anti-wear fin 300 is heated can be eliminated, the first anti-wear fin 300 is prevented from deforming or falling, and the safety of the circulating fluidized bed boiler is further improved.
In addition, the surface of the first anti-wear fin 300 can also be used for heating the circulating fluidized bed boiler, so that the area of the heating surface of the circulating fluidized bed boiler is increased, and the thermal efficiency of the circulating fluidized bed boiler is improved.
The first anti-wear fin 300 can be composed of two independent plate sections, at this time, the expansion joint 310 penetrates through the cross section of the first anti-wear fin 300, but the welding workload of the two independent plate sections is large, and the welding precision cannot be guaranteed, so when the first anti-wear fin 300 cuts the expansion joint 310, the expansion joint 310 does not need to penetrate through the cross section of the whole first anti-wear fin 300, the expansion joint 310 penetrates through one side of the connecting plate 200, and a part for connection between two adjacent plate sections is reserved on one side of the first anti-wear fin 300 departing from the connecting plate 200, at this time, the first anti-wear fin 300 can be integrally welded, so that the welding workload is small, and the welding precision is high.
In an alternative embodiment, the first wear fin 300, the water wall tubes 100, and the connection plate 200 may all be high temperature resistant structures. The scheme enhances the high temperature resistance of the first anti-wear fin 300, the water wall tube 100 and the connecting plate 200, so that the service lives of the first anti-wear fin 300, the water wall tube 100 and the connecting plate 200 can be effectively prolonged. Optionally, the surfaces of the first anti-wear fin 300, the water wall tubes 100 and the connection plate 200 may be coated with a high temperature resistant coating, or the first anti-wear fin 300, the water wall tubes 100 and the connection plate 200 may be made of a high temperature resistant material, such as Cr25Ni 20.
Since the first anti-wear fin 300 has a large length, the range of thermal deformation of the first anti-wear fin 300 is large, and the local deformation amount is inconsistent, a plurality of expansion slots 310 may be provided, and the expansion slots 310 may be provided at intervals along the extending direction of the strip structure. At this time, the multiple expansions divide the first anti-wear fin 300 into more plate segments, each of which has substantially the same amount of deformation, so that the first anti-wear fin 300 is less likely to cause a situation where internal stress is locally concentrated.
When the distance between two adjacent expansion joints 310 is larger, the length of the separated plate section is larger, so that the deformation amount of the plate section caused by thermal deformation is larger, and the plate section is easy to fall; when the distance between two adjacent expansion slots 310 is small, the processing workload of the first wear fin 300 is large. For this reason, in an alternative embodiment, the distance between two adjacent expansion gaps 310 may be 150-250 mm. At this time, the length of each plate segment can be within a range of 150-250 mm, the length of each plate segment is small, and the deformation amount is small, so that the deformation of the first anti-wear fin 300 is uniform. Meanwhile, the distance between two adjacent expansion gaps 310 is controlled to be 150-250 mm, so that the processing workload of the first anti-abrasion fins 300 is small.
Optionally, the distance between two adjacent expansion slits 310 is 200mm, at this time, the length of each plate segment may also be 200mm, and the structure of the first wear-resistant fin 300 is more regular.
In another embodiment, the dimension of the first anti-wear fin 300 along the first direction may be a first dimension, the first direction is perpendicular to the connecting plate 200, the first direction is perpendicular to the extending direction of the strip-shaped structural member, the first direction may be a width direction of the first anti-wear fin 300, the first dimension may be a width of the first anti-wear fin 300, and the first dimension may be 40-60 mm. At this time, the width of the first anti-wear fin 300 can meet the installation requirement, and the volume of the first anti-wear fin 300 is controlled within a certain range. Preferably, the first dimension may be 50 mm.
In the above embodiment, the distance between the first wear fin 300 and one of the two adjacent water wall tubes 100 is a first distance, the distance between the first wear fin 300 and the other of the two adjacent water wall tubes 100 is a second distance, and when the first distance and the second distance are not equal, the densities of the solid particles that can be contacted by the surfaces of the two adjacent water wall tubes 100 are not equal, so that the wear of the surfaces of the adjacent water wall tubes 100 is deviated, which results in an increase in the wear amount of one of the water wall tubes 100. The open areas separated by the first wear fin 300 are of the same size so that the density of the solid particles is substantially equal, and the amount of wear on the adjacent two water wall tubes 100 is substantially the same. Meanwhile, the distribution of the heating surface of the circulating fluidized bed boiler is more balanced, and the heat is not easy to concentrate.
To further improve the safety of the circulating fluidized bed boiler, in an alternative embodiment the circulating fluidized bed boiler further comprises a protective layer covering the side walls of the waterwall tubes 100. In this scheme, the inoxidizing coating is at first worn and torn to solid particle, just can wear and tear the surface of water wall pipe 100 after the inoxidizing coating destroys, and then has prolonged water wall pipe 100's life to circulating fluidized bed boiler's security has been improved. Optionally, the protective layer may be a protective tile attached to the side wall of the water wall tube 100, and the protective tile may be made of iron, aluminum, ceramic, or other materials.
In order to further reduce the wear on the surface of the water wall tubes 100, in another alternative embodiment, the circulating fluidized bed boiler further includes at least one set of second anti-wear fins 400, the second anti-wear fins 400 are disposed on the connecting plate 200, the second anti-wear fins 400 are perpendicular to the first anti-wear fins 300, and the set of second anti-wear fins 400 are spaced along the axial direction of the water wall tubes 100. At this time, the first anti-wear fins 300 are vertically disposed, and the second anti-wear fins 400 are horizontally disposed. In this scheme, the second anti-wear fins 400 can slow down the falling speed of the solid particles, so that the impact of the solid particles on the surface of the water wall tube 100 is small, and meanwhile, the second anti-wear fins 400 can also change the falling direction of the solid particles, thereby reducing the density of the solid particles contacting with the surface of the water wall. The optional second wear fins 400 may be welded to the connection plate 200.
Optionally, the specific number of the set of second wear fins 400 may be selected according to the length of the water wall tube 100, which is not limited herein.
The junction of the water wall tube 100 and the connection plate 200 leaks, which easily causes the over-high temperature of the furnace wall of the circulating fluidized bed boiler, resulting in the furnace wall being burned red, thereby causing the safety of the circulating fluidized bed boiler to be low. In an optional embodiment, the joint of the water wall tube 100 and the connecting plate 200 is provided with a sealing coating, in this scheme, the sealing coating can prevent the joint of the water wall tube 100 and the connecting plate 200 from leaking, and meanwhile, the sealing coating can also play a role of heat insulation, so that the temperature of the furnace wall temperature is lower, and the safety of the circulating fluidized bed boiler is further improved. Optionally, a full weld mode may be adopted between the water wall tubes 100 and the connection plate 200, so as to increase the connection strength and the sealing performance between the water wall tubes 100 and the connection plate 200. The sealing coating can be made of high-temperature-resistant sealant or high-temperature-resistant ceramic and other materials.
In the above embodiment, the size of the expansion joint 310 in the axial direction of the water wall tube 100 is the second size, which may be the width of the expansion joint 310, and when the size of the expansion joint 310 is large, the strength of the first wear fin 300 is easily affected; when the width of the expansion gap 310 is small, interference is easily generated when adjacent two plate sections are deformed. In an alternative embodiment, the second dimension may be 3-5 mm, which can meet both the strength requirement of the first anti-wear fin 300 and the deformation requirement of the two adjacent plate segments. Specifically, the second size can be between 3-5 mm, and the size range can facilitate the manufacturing of the circulating fluidized bed boiler. Preferably, the second dimension may be 4 mm.
The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A circulating fluidized bed boiler, comprising a plurality of waterwall tubes (100), a plurality of connecting plates (200), and a plurality of first wear fins (300);
two adjacent water wall tubes (100) are connected through the connecting plate (200), the first anti-abrasion fins (300) are strip-shaped structural members, the extending direction of the strip-shaped structural members is the same as the axis direction of the water wall tubes (100), the connecting plate (200) is perpendicular to the first anti-abrasion fins (300), expansion joints (310) are formed in the first anti-abrasion fins (300), the expansion joints (310) penetrate towards one side of the connecting plate (200), and the extending direction of the expansion joints (310) is perpendicular to the extending direction of the strip-shaped structure.
2. The circulating fluidized bed boiler of claim 1, wherein the first wear fins (300), the water wall tubes (100) and the connection plate (200) are high temperature resistant structures.
3. The circulating fluidized bed boiler of claim 1, wherein the number of the expansion slots (310) is plural, and the plural expansion slots (310) are arranged at intervals.
4. The circulating fluidized bed boiler according to claim 3, wherein the distance between two adjacent expansion gaps (310) is 150-250 mm.
5. The circulating fluidized bed boiler of claim 1, wherein the dimension of the first wear fins (300) in a first direction perpendicular to the connection plate (200) is a first dimension, the first dimension being 40-60 mm.
6. The circulating fluidized bed boiler of claim 1, wherein a distance between the first wear fin (300) and one of the two adjacent water wall tubes (100) is a first distance, and a distance between the first wear fin (300) and the other of the two adjacent water wall tubes (100) is a second distance, the first and second distances being equal.
7. The circulating fluidized bed boiler according to claim 1, further comprising a protective layer covering the side walls of the waterwall tubes (100).
8. The circulating fluidized bed boiler of claim 1, further comprising at least one set of second wear fins (400), the second wear fins (400) being disposed on the connection plate (200), the second wear fins (400) being perpendicular to the first wear fins (300), a set of the second wear fins (400) being spaced apart along an axial direction of the water wall tubes (100).
9. A circulating fluidized bed boiler according to claim 1, characterized in that the joints of the waterwall tubes (100) and the connection plate (200) are provided with a sealing coating.
10. The circulating fluidized bed boiler of claim 1, wherein the expansion joint (310) has a second dimension along the axis of the waterwall tubes (100), the second dimension being 3-5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020661252.XU CN212430842U (en) | 2020-04-26 | 2020-04-26 | Circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020661252.XU CN212430842U (en) | 2020-04-26 | 2020-04-26 | Circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212430842U true CN212430842U (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020661252.XU Active CN212430842U (en) | 2020-04-26 | 2020-04-26 | Circulating fluidized bed boiler |
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|---|---|
| CN (1) | CN212430842U (en) |
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2020
- 2020-04-26 CN CN202020661252.XU patent/CN212430842U/en active Active
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