CN104791759B - For connection fin, method and the boiler being connected between the water cooling tube of boiler water wall - Google Patents
For connection fin, method and the boiler being connected between the water cooling tube of boiler water wall Download PDFInfo
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- CN104791759B CN104791759B CN201510150243.8A CN201510150243A CN104791759B CN 104791759 B CN104791759 B CN 104791759B CN 201510150243 A CN201510150243 A CN 201510150243A CN 104791759 B CN104791759 B CN 104791759B
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- fin
- boiler
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- connection
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001816 cooling Methods 0.000 title claims description 70
- 239000012774 insulation material Substances 0.000 claims description 18
- 238000003466 welding Methods 0.000 claims description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 9
- 230000035882 stress Effects 0.000 description 19
- 239000011799 hole material Substances 0.000 description 14
- 238000005336 cracking Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008646 thermal stress Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Abstract
The present invention relates to field of heat exchange, disclose a kind of for being connected to connection fin and its method to set up and boiler on boiler water wall, the connection fin includes fin body (10), the fin body (10) is used for towards being fixed with heat shield (20) on the medial surface of boiler, so as to effectively prevent the generation of crackle, so that it is guaranteed that the safe operation of boiler.
Description
Technical field
The present invention relates to field of heat exchange, in particular it relates to which a kind of be used to be connected between the water cooling tube of boiler water wall
Connection fin.In addition, the invention further relates to be provided with the boiler of the connection fin and the method to set up of the connection fin.
Background technology
In station boiler, particularly in large and super-critical transformation direct current cooker, generally by water-cooling wall be arranged to above and below two
Part is to adapt to variable-pressure operation requirement.Specifically, bottom is for spirally-wound tubes or with female water-cooling wall, and top is vertical
Water-cooling wall, is connected between two parts by transition header up and down.Utilize transition header so that in the cooling tube of bottom water-cooling wall
Medium can be sufficiently mixed in the transition header, so as to lower the thermal stress that temperature difference is brought.
In the prior art, the outward bending set respectively at the middle part of top water-cooling wall and bottom water-cooling wall is generally utilized
Connecting tube support transition header in 90 °.In order to reliably be supported to transition header, the bending typically in connecting tube
Part is welded with connection fin, to carry out transmission load.
Although the connection fin is also to be cooled down by the cooling tube of adjacent water-cooling wall, because connection fin is set
Put the higher region of temperature in the boiler, the higher thus produced thermal stress of the thermic load that the water-cooling wall of the position is received
Also it is larger.Simultaneously as the connection fin is connected between top water-cooling wall and bottom water-cooling wall, thus also hold in structure
Stress concentration is also easy to produce, so that connection fin is easily cracked, even extends on cooling tube and causes letting out for cooling tube
Leakage, and then have a strong impact on the safe and stable operation of power station unit.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of connection fin, and the connection fin effectively prevents crackle
Produce, so that it is guaranteed that the safe operation of boiler.
In order to solve the above-mentioned technical problem, the present invention provides a kind of for being connected between the water cooling tube of boiler water wall
Connect fin, including fin body, being used for of the fin body is fixed with heat shield towards on the medial surface of boiler.
Preferably, the central area of the fin body is provided with stress release portion.
Preferably, the stress release portion is circular hole.
Preferably, the stress release portion is through hole, and insulation material portion is filled with the through hole.
Preferably, the insulation material portion is full of the through hole, and protruding from the fin body with the medial surface
On opposite lateral surface.
Preferably, the area of the heat shield is more than the area of the fin body, and is covered in the fin body
On.
Preferably, the heat shield is connected to the fin body by the spot welding connecting portion of more than three.
Preferably, the heat shield is stainless steel heat shield.
Preferably, the fin body is H-shaped fin, and the left and right sides of the H-shaped fin is able to be connected to adjacent
Water cooling straight tube between, the recess of the both sides up and down of the H-shaped fin is able to accommodate and connect water-cooling bend.
The present invention also provides a kind of boiler, is provided with boiler water wall, the boiler water wall and is provided with the boiler
Connection fin according to any one in above-mentioned technical proposal.
The present invention also provides another boiler, is provided with boiler water wall in the boiler, the boiler water wall is divided into top
Be respectively arranged with water-cooling wall and bottom water-cooling wall, the top water-cooling wall and bottom water-cooling wall the connecting section of outward bending with
Connect the connection fin being provided with transition header, the boiler water wall according to above-mentioned technical proposal.
The present invention separately provides a kind of method to set up of the connection fin for boiler water wall, it is characterised in that the company
The method to set up for connecing fin comprises the steps：(a) fin body is soldered on water cooling tube；(b) in the fin body
Spot welding heat shield on towards the medial surface of boiler.
Preferably, the method to set up of the connection fin is additionally included in the central area of the fin body provided with stress release
Portion, and inject insulation material to form insulation material portion in the stress release portion.
By above-mentioned technical proposal, can effectively it be stopped from boiler using the heat shield being arranged on fin body
The hot transmission to fin body, so as to effectively prevent from cracking because of thermal stress, so that it is guaranteed that the safe operation of boiler.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is intended to indicate that the front view of the structure of connection fin of the present invention.
Fig. 2 is intended to indicate that the side view of the structure of connection fin of the present invention.
Description of reference numerals
The 10 connection weld parts of fin 11
The spot welding connecting portion of 20 heat shield 21
The water cooling straight tube of 30 water cooling tube 31
32 water-cooling bends
The insulation portion of 40 stress release portion 50
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
In the present invention, in the case where not making opposite explanation, the noun of locality used such as " upper and lower, left and right " is typically referred to
Upper and lower, left and right shown in refer to the attached drawing；" inside and outside " refers to the inside and outside of the profile relative to each part in itself.Wherein, in Fig. 2
Arrow A indicated by direction on the outside of boiler.
The present invention provides a kind of connection fin for being used to be connected between the water cooling tube 30 of boiler water wall, as shown in figure 1,
The connection fin includes fin body 10, and fin body 10 is used for towards being fixed with heat shield 20 on the medial surface of boiler.
In the present invention by setting the heat that heat shield 20 can make stop from boiler to the transmission of fin body 10, enter
And can effectively prevent from cracking because of thermal stress, so that it is guaranteed that the safe operation of boiler.
Heat shield 20 provided by the present invention is formed for atraumatic outer shield heat shield.And can be in the time between overhauls(TBO)
In changed, save labor, it is cost-effective.Heat shield 20 can appropriate machining shape, make itself and adjacent water cooling tube (water cooling
Wall) and fin body 10 more closely fit together, without substantially raised, thus will not be to furnace wall cooling coking situation
Produce significant adverse influence.
In addition, can also make the gap that very little is left between heat shield 20 and fin body 10, so as to using in gap
Air layer be thermally shielded.
On the basis of above-mentioned technical proposal, the central area of fin body 10 is provided with stress release portion 40.
As a kind of preferred embodiment of above-mentioned technical proposal, stress release portion 40 is circular hole.The aperture of the circular hole is needed
To be set according to fin body, aperture is too big, then can reduce fin body as the load work(of carrying bottom water-cooling wall weight
Energy；Aperture is too small, then can not effectively act as eliminating the function of stress concentration, and reduces fin body central temperature in use overtemperature
Risk.Appropriate aperture should take into account above-mentioned both sides factor, to reduce the probability for sprouting formation of crack.Specifically, should
Circular hole is diameter 20-30mm.The technical scheme can either implement the fin sheet for the connection fin not cracked also in firm military service
On body 10, it can also implement be on active service on the fin body 10 of a period of time and the connection fin cracked.
During applied to the fin body cracked, it should crackle is polished into clean, or diameter 1-2mm is opened up in crack tip
Stop hole, and the fin body 10 being had been extended to for crackle in the connection fin of water cooling tube 30 should then take pipe measure of changing,
And the connection fin more renewed.
In addition, the diameter of the circular hole can be set to according to concrete shape and area of fin body 10 etc. one or
It is multiple.
On the basis of above-mentioned technical proposal, stress release portion 40 is through hole, and insulation material portion 50 is filled with the through hole.
Specifically, by being injected in the cavity of through hole or filling insulation material, insulation material portion 50 is formed after insulation material cooling.
The insulation material portion forms protection and sealing to water cooling tube 30, boiler wall.
It is preferred that insulation material portion 50 is full of the through hole, and protrude from the lateral surface opposite with medial surface of fin body 10
On.As shown in Fig. 2 the insulation material portion 50 is by prominent to A to (boiler on the outside of), so as to curved with adjacent connection water cooling
Pipe 32 is contacted, and certain booster action is played in the transmission to load etc..
In the technology of above-mentioned technical proposal, the area of heat shield 20 is more than the area of fin body 10, and is covered in
On fin body 10, so as to more effectively be isolated to the heat from boiler.
Heat shield 20 is connected to fin body 10 by the spot welding connecting portion 21 of more than three.Specifically, spot welding connecting portion
21 are distributed in the top and the bottom of heat shield so that heat shield 20 is fixed on fin body 10, and side is without welding, and weld part
Dividing can not extend on water cooling tube 30.It is additionally, since heat shield with water cooling tube 30 not weld together, in the absence of sequential welding
Seam.Even if cracking, the crackle also will not expand to water cooling tube 30 and cause it to leak.
The higher stainless steel of allowable temperature is preferably used as the material of heat shield 20.Because the material of fin body should be adopted
With to ensure that its thermal coefficient of expansion is identical, and stainless steel heat shield 20 being capable of phase with material (band steel) that water cooling tube is same or like
Than there is higher allowable temperature, more preferable toughness, higher high temperature resistant property, therefore, it is possible to reliably play in fin body
Heat-blocking action.Further, since being to be fixed using spot welding between heat shield 20 and fin body 10, not as carrying and sealing
Part, thus the coefficient of expansion of heat shield 20 need not be consistent with water cooling tube 30, and also heat shield 20 can't be because of the coefficient of expansion
It is inconsistent and to fin body 10 apply stress.
The present invention is especially suitable for the situation that fin body 10 is H-shaped fin, the left and right sides of H-shaped fin is able to connect
It is connected between adjacent water cooling straight tube 31, the recess of the both sides up and down of H-shaped fin is able to accommodate and connects water-cooling bend 32.
H-shaped fin is to use the mode for welding (weld part 11) entirely with adjacent tubes to be connected to be sealed and transmitted load,
And H-shaped fin is cooled down as other fins by the medium in adjacent water cooling tube.But, it is connected fin between normal pipe
The width of piece is compared, and the width of H type fins will have more several times, so, cooling effect is poor, while what multiple water cooling tubes were formed
The central region of water-cooling wall is areas of higher temperature in burner hearth, thus water-cooling wall receives burning heat radiation and negative by higher heat
Lotus, and the temperature for the H-shaped fin for making to be connected to the position is higher, causes Temperature stress larger.Simultaneously as H types fin is passed
Pass carrying, and influenceed by a variety of factors such as the discontinuous, welding residual stress in structure, unit variable load operations, pole
Various stress concentration superpositions are easily formed, cause crackle to sprout and extend, Crack Extension extends to water screen tube to a certain extent
Son gets on, and will cause the cracking leakage of water-cooling wall pipe, causes boiler unplanned outage, has a strong impact on the safety and stability fortune of unit
OK.
And the present invention then can by being drilled on H type fins to alleviate stress concentration as stress release portion 40, and
Preferable sealing is formed by injecting insulation material in circular hole, so that the phenomenon such as anti-leak-stopping ash.Simultaneously, additionally it is possible in H types
The external point face of weld product of fin stops the heat from boiler to fin body 10 slightly larger than the stainless steel heat shield of H type fins
Transmission, and then can effectively prevent from cracking because of thermal stress, so that it is guaranteed that the safe operation of boiler.
The present invention also provides a kind of boiler, is provided with boiler water wall, the boiler water wall and is provided with the boiler
Connection fin according to above-mentioned technical proposal, thus have the advantages that described above.
The present invention separately provides a kind of boiler, is provided with boiler water wall in the boiler, the boiler water wall is divided into upper water
The connecting section of outward bending is respectively arranged with cold wall and bottom water-cooling wall, the top water-cooling wall and bottom water-cooling wall with even
Take over and cross header, the fin body 10 described in above-mentioned technical proposal is provided with the boiler water wall and is formed as H-shaped fin
Fin is connected, is similarly had the advantages that described above.
As another side of the present invention, body of the present invention is a kind of altogether to be used for the setting side for connecting fin of boiler water wall
Method, the method to set up comprises the steps：(a) fin body 10 is soldered on water cooling tube 30；(b) in the fin body 10
The medial surface towards boiler on spot welding heat shield 20.
The method to set up is used to connect in the water-cooling wall that fin setting is made up of water cooling tube.In addition, provided by the present invention
Method to set up, the connection fin in use can either be applied, that is to say, that, it is believed that step a is real before
Apply and finish.
On the basis of upper technical scheme, the method to set up of the connection fin is additionally included in the center of the fin body 10
Area is provided with stress release portion 40, and injects insulation material to form insulation material portion 50 in the stress release portion 40.The step
Suddenly it can implement on the unwelded fin body 10 on water cooling tube 30, can also be carried out between step a and step b.
By above-mentioned analysis, the method to set up of the connection fin of the present invention for boiler water wall is by dividing
Crackle Producing reason, mechanism are analysed, is set about from preventing that formation of crack from producing, by simply drilling, injecting insulation pouring material, outer patch
The measures such as stainless steel heat shield, you can effectively prevent the generation of similar crackle, expand on water cooling tube and cause water cooling tube to leak, shadow
Ring the risk of safe operation of the boiler.Stainless steel heat shield can also be checked within the scheduled overhaul cycle, to being damaged after military service
Stainless steel heat shield changed.The method to set up has carried out practical validation in some power plant, by 2 years 2 times maintenance weeks
The inspection of phase finds that the method to set up of the connection fin can be prevented effectively from the generation and extension of H type fin crackles.Using the party
After method, water-cooling wall is not found because the cracking of H type fins causes occur quick-fried leakage in operation.The method to set up of the connection fin is because of it
With simple, effective, cost is low, the characteristics of risk is low, and before having wide application on overcritical, ultra supercritical large-sized boiler
Scape.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.It is further to note that in above-mentioned embodiment
Described in each particular technique feature, in the case of reconcilable, can by any suitable means be combined, be
Unnecessary repetition is avoided, the present invention no longer separately illustrates to various possible combinations.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (9)
1. a kind of connection fin for being used to be connected between the water cooling tube of boiler water wall (30), including fin body (10), its
It is characterised by, the fin body (10) is H-shaped fin, the left and right sides of the H-shaped fin is able to be connected to adjacent
Between water cooling straight tube (31), the recess of the both sides up and down of the H-shaped fin is able to accommodate and connects water-cooling bend (32), institute
State being used for towards being fixed with heat shield (20) on the medial surface of boiler for fin body (10)；
The central area of the fin body (10) is provided with stress release portion (40)；
The stress release portion (40) is through hole, is filled with insulation material portion (50) in the through hole.
2. connection fin according to claim 1, it is characterised in that the stress release portion (40) is circular hole.
3. connection fin according to claim 1, it is characterised in that the insulation material portion (50) is full of the through hole,
And protrude from the lateral surface opposite with the medial surface of the fin body (10).
4. connection fin according to claim 1, it is characterised in that the area of the heat shield (20) is more than the fin
The area of body (10), and be covered on the fin body (10).
5. connection fin according to claim 1, it is characterised in that the heat shield (20) passes through the spot welding of more than three
Connecting portion (21) is connected to the fin body (10).
6. connection fin according to claim 1, it is characterised in that the heat shield (20) is stainless steel heat shield.
7. it is provided with boiler water wall in a kind of boiler, the boiler, it is characterised in that be provided with basis on the boiler water wall
Connection fin in claim 1-6 described in any one.
8. being provided with boiler water wall in a kind of boiler, the boiler, the boiler water wall is divided into top water-cooling wall and bottom water cooling
The connecting section of outward bending is respectively arranged with to connect transition header in wall, the top water-cooling wall and bottom water-cooling wall, its
It is characterised by, the connection fin according to any one in claim 1-6 is provided with the boiler water wall.
9. a kind of method to set up of connection fin for boiler water wall, the connection fin is H-shaped fin, the H-shaped fin
The left and right sides of piece is able to be connected between adjacent water cooling straight tube (31), the recess of the both sides up and down of the H-shaped fin
It is able to accommodate and connects water-cooling bend (32), it is characterised in that the method to set up of the connection fin comprises the steps：
(a) fin body (10) is soldered on water cooling tube (30)；
(b) the spot welding heat shield (20) on the medial surface towards boiler of the fin body (10)；
(c) stress release portion (40) are set in the central area of the fin body (10), and in the stress release portion (40)
Insulation material is injected to form insulation material portion (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510150243.8A CN104791759B (en) | 2015-03-31 | 2015-03-31 | For connection fin, method and the boiler being connected between the water cooling tube of boiler water wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510150243.8A CN104791759B (en) | 2015-03-31 | 2015-03-31 | For connection fin, method and the boiler being connected between the water cooling tube of boiler water wall |
Publications (2)
| Publication Number | Publication Date |
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| CN104791759A CN104791759A (en) | 2015-07-22 |
| CN104791759B true CN104791759B (en) | 2017-09-26 |
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| CN201510150243.8A Active CN104791759B (en) | 2015-03-31 | 2015-03-31 | For connection fin, method and the boiler being connected between the water cooling tube of boiler water wall |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500540A (en) * | 2015-09-06 | 2017-03-15 | 上海上电漕泾发电有限公司 | A kind of method for reducing boiler heating surface abrasion |
| CN105290578A (en) * | 2015-11-13 | 2016-02-03 | 江苏绿叶锅炉有限公司 | Chamfering-free pipe row welding technology of ultra-supercritical boiler high-temperature screen type overheater |
| CN105889973A (en) * | 2016-07-01 | 2016-08-24 | 长安益阳发电有限公司 | Sealing fin for boiler furnace wall |
| CN110788506A (en) * | 2019-12-30 | 2020-02-14 | 福能(贵州)发电有限公司 | Method for preventing deformation of water-cooled wall assembly |
| CN113719819B (en) * | 2021-09-09 | 2024-03-26 | 北京华科同和科技有限公司 | Manhole door sealing box and tower type supercritical boiler |
| CN113776079B (en) * | 2021-09-18 | 2023-02-24 | 西安热工研究院有限公司 | Air-cooled vertical water-cooled wall middle transition pipe fitting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6149924A (en) * | 1984-08-20 | 1986-03-12 | Mitsui Eng & Shipbuild Co Ltd | Combustion device |
| CN203036673U (en) * | 2012-12-21 | 2013-07-03 | 河南华润电力首阳山有限公司 | Water cooled wall of boiler |
| CN104075339A (en) * | 2014-07-10 | 2014-10-01 | 国家电网公司 | Power station pulverized coal boiler heat insulation band and method for determining area and laying position of heat insulation band |
-
2015
- 2015-03-31 CN CN201510150243.8A patent/CN104791759B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6149924A (en) * | 1984-08-20 | 1986-03-12 | Mitsui Eng & Shipbuild Co Ltd | Combustion device |
| CN203036673U (en) * | 2012-12-21 | 2013-07-03 | 河南华润电力首阳山有限公司 | Water cooled wall of boiler |
| CN104075339A (en) * | 2014-07-10 | 2014-10-01 | 国家电网公司 | Power station pulverized coal boiler heat insulation band and method for determining area and laying position of heat insulation band |
Non-Patent Citations (2)
| Title |
|---|
| 可拆卸式陶瓷隔热板卫燃带在电厂锅炉上的应用;陈冬林等;《发电技术》;20051031;第38卷(第10期);第72-73页 * |
| 大型超临界W火焰锅炉鳍片式受热面管泄漏原因探讨;黄伟等;《2013年电机工程学会年会论文集》;20140317;第6小节 * |
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| CN104791759A (en) | 2015-07-22 |
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