CN105737132B - A kind of device for reducing the deformation of supercritical circulating fluidized bed boiler monowall tube - Google Patents
A kind of device for reducing the deformation of supercritical circulating fluidized bed boiler monowall tube Download PDFInfo
- Publication number
- CN105737132B CN105737132B CN201610115178.XA CN201610115178A CN105737132B CN 105737132 B CN105737132 B CN 105737132B CN 201610115178 A CN201610115178 A CN 201610115178A CN 105737132 B CN105737132 B CN 105737132B
- Authority
- CN
- China
- Prior art keywords
- fin
- water screen
- tube
- fluidized bed
- monowall
- 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 - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 210000003205 muscle Anatomy 0.000 claims abstract description 26
- 238000003466 welding Methods 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 claims abstract 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000035882 stress Effects 0.000 abstract description 8
- 238000005299 abrasion Methods 0.000 abstract description 6
- 230000008646 thermal stress Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/101—Tubes having fins or ribs
- F22B37/102—Walls built-up from finned tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
Abstract
A kind of device for reducing the deformation of supercritical circulating fluidized bed boiler monowall tube, including water screen tube group (1), fin (2), strengthen muscle (3) and stress relief grooves (4), fin (2) is welded with water screen tube group (1) between the adjacent water screen tube of each two, muscle (3) is strengthened in welding on the back-fire side centre position of fin (2), between two on each fin (2) are strengthened muscle (3), stress relief grooves (4) are provided with.Another form of the present invention is the T-shaped fin (5) of direct welded shaping between the adjacent water screen tube of each two in water screen tube group (1), to substitute fin (2) and strengthen muscle (3).The present invention can strengthen the intensity of monowall tube, be effectively reduced the thermal stress deformation of monowall tube, slow down the abrasion of monowall tube.Be advantageous to the design, manufacture and improvement boiler operation situation of supercritical circulating fluidized bed boiler.
Description
Technical field：
The invention belongs to fluidized-bed combustion boiler technical field, and in particular to one kind reduces supercritical circulating fluidized bed boiler membrane type
The device of water screen tube deformation.
Background technology：
Supercritical circulating fluidized bed boiler technology is that Combustion technology of circulating fluidized is mutually tied with supercritical parameter generation technology
The high-efficiency cleaning combustion technology of conjunction.At present, the 600MW supercritical circulating fluidized bed boilers that China puts into operation in Sichuan Baima are the world
Upper installed capacity is maximum, parameter highest CFBB.
The security of water-cooling wall is extremely important for the safe for operation of boiler, economy, reliability.Due to recirculating fluidized bed pot
The burning feature of stove is different from coal-powder boiler, and larger material concentration is boiler combustion and the basic demand of heat transfer property in stove, this
One characteristic determines that Gas-solid Two-phase Flow certainly exists to the abrasive action of heating surface.Especially monowall tube is heated
Deformation and fin panel casing pipe surface have bumps, can be further exacerbated by the abrasion of monowall tube.
Supercritical circulating fluidized bed boiler generally uses low quality flow rate, super to face unlike subcritical parameter boiler
The monowall tube caliber of boundary's CFBB diminishes, fin narrows, rigidity is deteriorated, and wall temperature is along water-cooling wall height side
To continuous change.Certain temperature difference between the upper and lower ends of same root monowall tube and different pipes be present, manage in addition
Screen dimensions are larger, and the monowall tube caused by thermal stress is easily produced in operation and is deformed.Actual motion shows, membrane type
To fiery lateral wearing in stove caused by water screen tube deformation, it has also become supercritical circulating fluidized bed boiler water screen tube wears main
One of reason.
Chinese patent CN202040805U is proposed a kind of prevents two-sided heated recirculating fluidized bed pot using cross fin
The anti-deformation technology of stove curtain wall.But because the curtain wall region solids loading of upper furnace is relatively low, abrasion
It is not serious, therefore the technology is not used to wear violent furnace wall cooling mainly for upper furnace region.
Chinese patent CN2839831Y propose it is a kind of in water-cooling wall to hanging down on fiery side monowall tube fin center line
The Anti-wear Technology of one steel bar is directly set.But into fiery wing furnace, material concentration is high due to CFBB, the device is also only
The relatively low material concentration upper zone such as region, emulsion zone of the material concentration such as burner hearth dilute-phase zone and roof of the furnace region can be arranged on
Do not apply to yet.
The content of the invention：
It is an object of the invention to provide a kind of dress for reducing the deformation of supercritical circulating fluidized bed boiler monowall tube
Put, slow down abrasion caused by supercritical circulating fluidized bed boiler Technique in Boiler Membrane Water Cooled Wall pipe deformation because of caused by thermal stress,
Improve the security of boiler operatiopn, economy.
A kind of device of reduction supercritical circulating fluidized bed boiler monowall tube deformation involved in the present invention, including
Water screen tube group 1, fin 2, strengthen muscle 3, stress relief grooves 4, welded between the adjacent water screen tube of each two in water screen tube group 1
Have a fin 2, on the back-fire side centre position of fin 2 welding strengthen muscle 3, on each fin 2 adjacent two strengthen muscle 3 it
Between, stress relief grooves 4 are provided with, prevent that the reinforcing upper and lower temperature difference of muscle 3 is excessive and deforms.
Another form of apparatus of the present invention is directly to weld one in water screen tube group 1 between the adjacent water screen tube of each two
Body formed T-shaped fin 5, to substitute fin (2) and strengthen muscle (3), remaining structure is identical with said apparatus.
The present invention can strengthen the intensity of monowall tube, be effectively reduced the thermal stress deformation of monowall tube,
It slow down the abrasion of monowall tube.Be advantageous to the design, manufacture and improvement boiler operatiopn of supercritical circulating fluidized bed boiler
Situation.
Brief description of the drawings：
Fig. 1 is the front view of apparatus of the present invention；
Fig. 2 is Fig. 1 top view；
Fig. 3 is the monowall tube top view with T-shaped fin 5；
In above-mentioned figure, 1 be water screen tube group, 2 be fin, 3 be strengthen muscle, 4 be stress relief grooves, 5 be T-shaped fin.
Embodiment：
Technical scheme is further described with reference to Figure of description and embodiment.
Embodiment 1
The present embodiment is the monowall tube that muscle 3 is strengthened in a kind of welding of supercritical circulating fluidized bed boiler back-fire side, such as
Shown in Fig. 1, Fig. 2, the monowall tube of formation carries T-shaped fin, and it is by water screen tube group 1, fin 2, reinforcing muscle 3 and stress
Release groove 4 forms.Fin 2 links two water screen tubes, vertical weldering on the center line of fin 2 between every two water screen tubes
It is connected to a reinforcing muscle 3.The width of fin 2 is 3mm -20mm, and it is 1 to strengthen the width of muscle 3 and fin width ratio:1.5—1:3,
The external diameter ratio for strengthening the height of muscle 3 and water screen tube group 1 is 1:2—1:4, the length for strengthening muscle 3 is 2000mm -4000mm, every two
Be provided between root strengthening tendons 3 length be 50mm -200mm stress relief grooves 4, set the present embodiment device scope from
Emulsion zone water-cooling wall and 500-1000mm below high-abrasive material boundary line to furnace outlet center line in circulating fluid bed boiler
Near zone.
The principle and workflow of the present embodiment are as follows：
Monowall tube is when heated, and relative to water screen tube group 1, fin 2 cools down worse, and temperature ascensional range is compared
It is much higher in water screen tube group 1, temperature difference between water screen tube group 1 and fin 2 be present, water screen tube group 1 and fin 2 can be sent out
Heat stress deformation.Therefore the deflection of fin 2 is bigger.The deformation direction of fin 2 is prominent, water cooling to water-cooling wall to fiery side simultaneously
Larger depression is formed between wall pipe group 1 and fin 2, it is easier to causes to wear.
The present embodiment welds on the existing monowall tube of supercritical circulating fluidized bed boiler on the center line of back-fire side fin 2
Connect and strengthen muscle 3, the rigidity of fin 2 can be strengthened by strengthening muscle 3, reduced fin 2 to the deflection to fiery side, reduced solid particle in stove
Abrasion to water screen tube group 1.Between two are strengthened muscle 3, stress relief grooves 4 are provided with, prevent that the reinforcing upper and lower temperature difference of muscle 3 is excessive
And deform.
Embodiment 2
The present embodiment is the monowall tube that a kind of supercritical circulating fluidized bed boiler carries T-shaped fin 5, such as Fig. 3 institutes
Show, be with the difference of embodiment 1, the T-shaped fin 5 in embodiment 2 is integrally formed by manufacturing process, to substitute reality
Apply the fin 2 in example 1 and strengthen muscle 3.It is in existing boiler water wall back-fire side compared to the monowall tube in embodiment 1
One section of reinforcing muscle 3 is welded on fin 2, the fin intensity of embodiment 2 is higher, less yielding.Except integrally formed T-shaped fin 5
Different from embodiment 1 outer, remaining structure is identical with embodiment 1.
Claims (2)
1. a kind of device for reducing the deformation of supercritical circulating fluidized bed boiler monowall tube, including water screen tube group (1), fin
Piece (2), strengthen muscle (3), stress relief grooves (4), it is characterized in that:In water screen tube group (1) between the adjacent water screen tube of each two
Be welded with fin (2), on the back-fire side centre position of fin (2) welding strengthen muscle (3), adjacent two on each fin (2)
Between root strengthens muscle (3), stress relief grooves (4) are provided with.
2. the device deformed according to a kind of claim (1) reduction supercritical circulating fluidized bed boiler monowall tube,
It is characterized in that：In water screen tube group (1) between the adjacent water screen tube of each two direct welded shaping T-shaped fin (5), with
Substitute fin (2) and strengthen muscle (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610115178.XA CN105737132B (en) | 2016-03-01 | 2016-03-01 | A kind of device for reducing the deformation of supercritical circulating fluidized bed boiler monowall tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610115178.XA CN105737132B (en) | 2016-03-01 | 2016-03-01 | A kind of device for reducing the deformation of supercritical circulating fluidized bed boiler monowall tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105737132A CN105737132A (en) | 2016-07-06 |
| CN105737132B true CN105737132B (en) | 2017-11-10 |
Family
ID=56249725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610115178.XA Expired - Fee Related CN105737132B (en) | 2016-03-01 | 2016-03-01 | A kind of device for reducing the deformation of supercritical circulating fluidized bed boiler monowall tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105737132B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185857A (en) * | 2018-08-17 | 2019-01-11 | 华电电力科学研究院有限公司 | Water screen tube fin and its processing and working method with buffering thermal stress and raising heat exchange efficiency |
| CN110762516B (en) * | 2019-11-01 | 2021-06-15 | 国电南京电力试验研究有限公司 | Directional regulation and control method for combustion tissue in W-flame boiler |
| 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 |
| CN112268270B (en) * | 2020-09-03 | 2023-03-31 | 浙江双峰锅炉制造有限公司 | Skid-mounted water pipe type low-nitrogen gas steam boiler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2839831Y (en) * | 2005-11-24 | 2006-11-22 | 上海锅炉厂有限公司 | Circulating fluid bed boiler T-shape finned film type water-cooled panel casing |
| CN204593378U (en) * | 2015-05-14 | 2015-08-26 | 哈尔滨哈锅锅炉工程技术有限公司 | A kind of tube wall shoe of circulating fluidized bed boiler water-cooling wall emulsion zone |
| CN204786317U (en) * | 2015-06-23 | 2015-11-18 | 上海锅炉厂有限公司 | Water -cooling wall release of stress groove |
| CN205014347U (en) * | 2015-07-16 | 2016-02-03 | 华北电力大学 | Novel circulating fluidized bed boiler abrasionproof fin |
-
2016
- 2016-03-01 CN CN201610115178.XA patent/CN105737132B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2839831Y (en) * | 2005-11-24 | 2006-11-22 | 上海锅炉厂有限公司 | Circulating fluid bed boiler T-shape finned film type water-cooled panel casing |
| CN204593378U (en) * | 2015-05-14 | 2015-08-26 | 哈尔滨哈锅锅炉工程技术有限公司 | A kind of tube wall shoe of circulating fluidized bed boiler water-cooling wall emulsion zone |
| CN204786317U (en) * | 2015-06-23 | 2015-11-18 | 上海锅炉厂有限公司 | Water -cooling wall release of stress groove |
| CN205014347U (en) * | 2015-07-16 | 2016-02-03 | 华北电力大学 | Novel circulating fluidized bed boiler abrasionproof fin |
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| Publication number | Publication date |
|---|---|
| CN105737132A (en) | 2016-07-06 |
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Granted publication date: 20171110 |