CN202546812U - Water cooled wall of boiler furnace - Google Patents
Water cooled wall of boiler furnace Download PDFInfo
- Publication number
- CN202546812U CN202546812U CN2012200951287U CN201220095128U CN202546812U CN 202546812 U CN202546812 U CN 202546812U CN 2012200951287 U CN2012200951287 U CN 2012200951287U CN 201220095128 U CN201220095128 U CN 201220095128U CN 202546812 U CN202546812 U CN 202546812U
- Authority
- CN
- China
- Prior art keywords
- water
- fin
- cooling wall
- boiler furnace
- water cooled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000001816 cooling Methods 0.000 claims description 41
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a water cooled wall of a boiler furnace. The water cooled wall comprises a plurality of water cooled wall pipes (10) and fins (20) for connecting the adjacent water cooled wall pipes (10), wherein the water cooled wall pipes (10) comprise straight pipes (11) and bent pipes (12); the bent pipes (12) are provided with bent pipe parts (13) and straight pipe parts (14); circular arcs (40) are formed in the tail ends of the fins (20) connected between each of the straight pipe parts (14) and each of the adjacent water cooled wall pipes (10); and crack arrest seams (50) and grooves (60) extending in the longitudinal direction of the fins (20) are also formed in the fins (20) between each of the straight pipe parts (14) and each of the adjacent water cooled wall pipes (10). According to the water cooled wall, the stress can be effectively reduced through the circular arcs and the tear caused by the stress can be prevented through the crack arrest seams. Even if the tear is produced, the tear can be directed through the grooves, so that the leakage from the water cooled wall due to the tear is prevented.
Description
Technical field
The utility model relates to field of boilers, particularly, relates to a kind of water-cooling wall of boiler furnace.
Background technology
Burner hearth is claimed the combustion chamber again, is the space that supplies fuel combustion in the boiler, and fuel can form thermal-flame and high-temperature flue gas in the burner hearth internal combustion, thereby the furnace wall around the burner hearth is made up of exotic material and insulation material.On the inner surface of furnace wall, often lay the water screen tube that many parallel transistors are formed, the main effect of water-cooling wall is the radiations heat energy that absorbs thermal-flame in the burner hearth or flue gas, in pipe, produces steam or hot water, and the reduction temperature of furnace wall, prevents that furnace wall from burning out.In heavy duty boiler, flame temperature is very high in the burner hearth, and thermal-radiating intensity is also very big, and in the boiler nearly 40～50% in addition more heat absorb by water-cooling wall.Therefore, except that minority low capacity boiler, modern boiler all with water-cooling wall as topmost evaporating heating surface in the boiler.
Wherein, water screen tube mainly is divided into light pipe formula water-cooling wall and fin panel casing, and fin panel casing mainly is welded by light pipe with as the band steel of fin, perhaps is welded by the extended surface tube that has fin, thereby forms the monoblock water-cooling wall.The advantage of fin panel casing is that air-tightness is good, and the water-cooling wall outside only need be applied with thin insulation material.Like this, the high-temperature flue gas in the burner hearth does not directly contact with furnace wall, helps preventing slagging scorification.Usually; Burner hearth is provided with a plurality of flame-observing holes that are used for manual observation, and the water screen tube around flame-observing hole does not have insulation and coats, and no fin connects between water screen tube; Its circumferential heating surface area is big, and the temperature of water-cooling wall can not be tended to balance evenly through directly conducting with other pipe.In addition, between straight tube and bend pipe,,, will cause fin to tear when stress is piled up gradually owing to the inconsistency that expands is easy to generate stress, thus the damage water-cooling wall.
On the existing furnace wall cooling flame-observing hole around be that fin place polishing diameter between bend pipe and straight tube is the hole of 6mm; Yet it is in service at long term high temperature; Stress still can't discharge, and often causes water-cooling wall to tear, and tears non-directional; Cause water-cooling wall to be revealed, boiler can't operate as normal.
The utility model content
The purpose of the utility model provides a kind of water-cooling wall of boiler furnace, and this water-cooling wall can reduce stress to be concentrated, and prevents that water-cooling wall from tearing.
To achieve these goals; The utility model provides a kind of water-cooling wall of boiler furnace; This water-cooling wall comprises a plurality of water screen tubes and the fin that is connected adjacent said water screen tube, and said water screen tube comprises straight tube and bend pipe, and said bend pipe comprises bent portion and straight sections; The end of the fin that wherein, is connected between said straight sections and the adjacent said water screen tube is formed with circular arc.
Preferably, the arc radius of said circular arc is width half the of fin.
In addition, the fin between said straight sections and the adjacent said water screen tube is provided with the crack arrest seam that extends along the longitudinal direction of said fin.
Preferably, said crack arrest seam is positioned at the middle part of said fin.
More preferably, said crack arrest seam extends from said circular arc.
Preferably, the width of said crack arrest seam is 1mm～3mm, and length is 60mm～100mm.
In addition, the fin between said straight sections and the adjacent said water screen tube is provided with the groove that extends along the longitudinal direction of said fin.
Preferably, said groove is positioned at the middle part of said fin.
More preferably, said groove extends from said crack arrest seam.
Preferably, the width of said groove is 3mm～5mm, and length is 60mm～100mm, and the degree of depth of groove is 1/3～1/2 of a fin thickness.
The water-cooling wall of the boiler furnace that the utility model provides seamlessly transits the connection of fin through circular arc is set, and can reduce stress effectively.In addition, the crack arrest seam is set on the fin between straight sections and the adjacent said water screen tube, can prevents stress and produce and tear.Even under the situation that generation is torn, on the fin between straight sections and the adjacent said water screen tube, groove is set, can make to tear to have directionality, prevent that water screen tube from producing leakage because of tearing.
Other feature and advantage of the utility model will partly specify in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is the further understanding that is used to provide the utility model, and constitutes the part of specification, is used to explain the utility model with the following specific embodiment, but does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 is the cross sectional representation of the water-cooling wall of the boiler furnace that provides of the utility model;
Fig. 2 is the longitudinal cross-section sketch map of the water-cooling wall of the boiler furnace that provides of the utility model;
Fig. 3 is the local enlarged diagram of the water-cooling wall of the boiler furnace that provides of the utility model.
Reference numeral
10 water screen tubes, 11 straight tubes
12 bend pipes, 13 bent portions
14 straight sections, 20 fins
30 holes, 40 circular arcs
60 grooves are stitched in 50 crack arrest
The specific embodiment
Be elaborated below in conjunction with the specific embodiment of accompanying drawing to the utility model.Should be understood that the specific embodiment described herein only is used for explanation and explains the utility model, is not limited to the utility model.
The cross sectional representation of the water-cooling wall of the boiler furnace that Fig. 1 provides for the utility model has the furnace wall (not shown) in the water-cooling wall arranged outside.Water-cooling wall comprises a plurality of water screen tubes 10 and the fin that is connected these water screen tubes 10 20.Wherein, said a plurality of water screen tube 10 is arranged in parallel.According to the pressure of boiler, water screen tube 10 selects for use carbon steel or steel alloy manufacturing to form with fin 20 mostly.The port at water screen tube two ends is connected with the header (not shown) respectively, to form the loop.
Usually, near the combustion zone of burner hearth, be provided with a plurality of holes 30, be divided into the flame-observing hole of the combustion case that is used for observing burner hearth and be the convenient manhole that is provided with of maintenance.For example, referring to Fig. 2, shown the furnace wall cooling that is provided with flame-observing hole.Thereby the water screen tube 10 of forming water-cooling wall specifically comprises straight tube 11 and bend pipe 12, connects through fin 20 between each water screen tube 10, forms water-cooling wall.Said bend pipe 12 has bent portion 13 and straight sections 14, and the bent portion 13 of bend pipe 12 with slot milling, thereby forms hole 30 to the inboard or the outside curve of burner hearth.That is, flame-observing hole is formed by the bent portion 13 of bend pipe 12.
Particularly, the straight sections 14 of bend pipe 12 is parallel with adjacent straight tube 11, and connects through fin 20.But in order to form hole 30, between the bent portion 13 of bend pipe 12 and adjacent straight tube 10, do not exist fin 20 to be connected.
When boiler operatiopn; The circumferential heating surface area of bend pipe 12 is big, and the radiations heat energy that its bent portion 13 absorbs can't conduct to adjacent straight tube 11 through fin 20, thereby makes heat can't balance even; Cause bend pipe 12 inconsistent, thereby produce stress with the expansion of straight tube 11.In the prior art, fin 20 and bent portion 13 are connected with the mode of straight tube 11 through welding, pile up gradually when stress, reach the fatigue strength of the fin 20 that is connected between straight sections 14 and the adjacent straight tube 11 after, will tear fin.If untimely the maintenance, fin 20 will further be torn and damage water screen tube, cause leaking.
In order to prevent that above-mentioned situation from occurring, the fin 20 that is connected between the utility model straight sections 14 and the adjacent said water screen tube 10 is provided with circular arc 40.Through the setting of this circular arc 40, the connection of fin 20 is seamlessly transitted, can reduce stress effectively.In order to reduce stress better, preferably, what the arc radius of said circular arc 40 can be for the width of fin 20 is half the.
Although the setting of above-mentioned circular arc 40 can effectively reduce stress, along with stress is piled up gradually, still the situation that fin 20 is torn might appear.Therefore, in the utility model, crack arrest seam 50 can be set on the fin 20 between said straight sections 14 and the adjacent water screen tube 10, this crack arrest seam 50 extends along the longitudinal directions of said fin 20.When fin 20 begins to tear, because the setting of crack arrest seam 50, can prevent that fin 20 from further tearing.Usually, as shown in Figures 2 and 3, said crack arrest seam 50 is positioned at the middle part of said fin 20.Preferably, said crack arrest seam 50 begins to extend from said circular arc 40, thereby can prevent better that fin 20 from tearing.
In addition, when adopting the waterpower soot blower to blow ash, fin 20 heating surfaces between said straight tube 11 and the said bend pipe 12 expand, amount of contraction is bigger, are easy to generate drawing crack.Through crack arrest seam 50, can offset the drawing crack stress of water screen tube 10.Said crack arrest seam 50 runs through fin 20 usually and forms, and the width of crack arrest seam 50 can be 1mm～3mm, and length can be 60mm～100mm.
In addition, if fin 20 is torn, receive the influence of effects such as stress, tearing non-directional of fin 20 will cause leakage when tearing to the tube wall development.Thereby, can be at the arranged outside groove 60 of the fin 20 between said straight sections 14 and the adjacent said water screen tube 10, this groove 60 extends along the longitudinal direction of said fin 20.Said groove 60 is set, can limits the direction of tearing of fin 20 effectively, prevented the water-cooling wall leakage.Usually, as shown in Figures 2 and 3, said groove 60 is positioned at the middle part of said fin 20.Preferably, said groove 60 begins to extend from said crack arrest seam 50, thereby the direction along groove 60 of fin 20 is torn.Usually, the width of said groove 60 is 3mm～5mm, and length is 60mm～100mm, and the degree of depth of groove is 1/3～1/2 of a fin thickness, so that limit the direction of tearing of fin 20 better.
The water-cooling wall of the boiler furnace that the utility model provides can reduce stress effectively through circular arc is set.In addition, crack arrest seam is set, can prevents stress and produce and tear.Even under the situation that generation is torn, can also make to tear to have directionality through the groove that is provided with, prevent that water screen tube from producing leakage because of tearing.
More than combine accompanying drawing to describe the preferred implementation of the utility model in detail; But; The utility model is not limited to the detail in the above-mentioned embodiment; In the technical conceive scope of the utility model, can carry out multiple simple modification or modification to the technical scheme of the utility model, these modification or modification all belong to the protection domain of the utility model.
Claims (10)
1. the water-cooling wall of a boiler furnace; This water-cooling wall comprises a plurality of water screen tubes (10) and the fin (20) that is connected adjacent said water screen tube (10); Said water screen tube (10) comprises straight tube (11) and bend pipe (12); Said bend pipe (12) has bent portion (13) and straight sections (14), it is characterized in that, the end of the fin (20) that is connected between said straight sections (14) and the adjacent said water screen tube (10) is formed with circular arc (40).
2. the water-cooling wall of boiler furnace according to claim 1 is characterized in that, the arc radius of said circular arc (40) is width half the of fin (20).
3. the water-cooling wall of boiler furnace according to claim 1 is characterized in that, the fin (20) between said straight sections (14) and the adjacent said water screen tube (10) is provided with the crack arrest seam (50) that extends along the longitudinal direction of said fin (20).
4. the water-cooling wall of boiler furnace according to claim 3 is characterized in that, said crack arrest seam (50) is positioned at the middle part of said fin (20).
5. the water-cooling wall of boiler furnace according to claim 3 is characterized in that, said crack arrest seam (50) begins to extend from said circular arc (40).
6. the water-cooling wall of boiler furnace according to claim 3 is characterized in that, the width of said crack arrest seam (50) is 1mm～3mm, and length is 60mm～100mm.
7. the water-cooling wall of boiler furnace according to claim 3 is characterized in that, the arranged outside of the fin (20) between said straight sections (14) and adjacent said water screen tube (10) has the groove (60) that extends along the longitudinal direction of said fin (20).
8. the water-cooling wall of boiler furnace according to claim 7 is characterized in that, said groove (60) is positioned at the middle part of said fin (20).
9. the water-cooling wall of boiler furnace according to claim 7 is characterized in that, said groove (60) stitches (50) from said crack arrest to begin to extend.
10. the water-cooling wall of boiler furnace according to claim 7 is characterized in that, the width of said groove (60) is 3mm～5mm, and length is 60mm～100mm, and the degree of depth of groove (60) is 1/3～1/2 of a fin thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200951287U CN202546812U (en) | 2012-03-14 | 2012-03-14 | Water cooled wall of boiler furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200951287U CN202546812U (en) | 2012-03-14 | 2012-03-14 | Water cooled wall of boiler furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202546812U true CN202546812U (en) | 2012-11-21 |
Family
ID=47167436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200951287U Expired - Lifetime CN202546812U (en) | 2012-03-14 | 2012-03-14 | Water cooled wall of boiler furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202546812U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593739A (en) * | 2012-03-27 | 2012-07-18 | 沈阳中兴电力通信有限公司 | Intelligent control system of magnetic navigation polling robot |
| CN113719819A (en) * | 2021-09-09 | 2021-11-30 | 北京华科同和科技有限公司 | Manhole door seal box and tower supercritical boiler |
-
2012
- 2012-03-14 CN CN2012200951287U patent/CN202546812U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593739A (en) * | 2012-03-27 | 2012-07-18 | 沈阳中兴电力通信有限公司 | Intelligent control system of magnetic navigation polling robot |
| CN113719819A (en) * | 2021-09-09 | 2021-11-30 | 北京华科同和科技有限公司 | Manhole door seal box and tower supercritical boiler |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121121 |
|
| CX01 | Expiry of patent term |