CN106765013A - Ultra-high parameter ultra-supercritical boiler three-stage burner hearth - Google Patents
Ultra-high parameter ultra-supercritical boiler three-stage burner hearth Download PDFInfo
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- CN106765013A CN106765013A CN201611072036.6A CN201611072036A CN106765013A CN 106765013 A CN106765013 A CN 106765013A CN 201611072036 A CN201611072036 A CN 201611072036A CN 106765013 A CN106765013 A CN 106765013A
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- Prior art keywords
- burner hearth
- ultra
- boiler
- header
- spiral
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
Abstract
The present invention is a kind of ultra-high parameter ultra-supercritical boiler three-stage burner hearth, the boiler three-stage burner hearth is designed using upper, middle and lower segment formula, the helix tube chamber structure that the lower furnace portion and middle part are constituted using helical water-cooled wall pipe, the vertical tube configuration that top is constituted using vertical water-wall tube, from the bottom up respectively lower part helical burner hearth（1）, middle spiral burner hearth（2）With upper vertical burner hearth（3）.The present invention can greatly improve the height of the less spiral burner hearth of thermal deviation, reduce the height of the larger vertical burner hearth of thermal deviation, and by increasing mixed once process, effectively reduce the heating power deviation between each circulation loop of carbonated drink side, reach and control within the scope of 12Cr1MoVG tubing allowable temperatures the wall temperature of water-cooling wall under extreme operating condition, device fabrication and the cost installed greatly are reduced, the safety and reliability of boiler operatiopn is improved.
Description
Technical field
The invention belongs to large-scale thermal power complete set of equipments, exist more particularly, to main steam and reheat steam temperature parameter
The burner hearth of the ultra-high parameter ultra-supercritical boiler of 630 DEG C and the above.
Background technology
Current large-size thermal power plant coal and oil combustion gas super critical boiler, multichannel stove is risen frequently with repeatedly reciprocal
Thorax is designed or uses spiral chamber design.Both chamber designs are all that boiler water-cooled is improved using certain structural measure
Working medium mass velocity in the wall circulatory system, greatly improves in water screen tube between flow working medium and water-cooling wall tube wall so as to reach
Convective heat-transfer coefficient, prevent film state or class film boiling so that there are enough heats to be absorbed by working medium, it is to avoid water-cooling wall exists
Overtemperature is overheated under hot environment, boiler stabilization long-term safety operation is maintained.
But under the conditions of the boiler design of more high parameter at present, the design of both the above boiler furnace water circulation system all goes out
The control of carbonated drink temperature deviation is difficult between having showed each loop so that burner hearth material selection faces the office that must upgrade in the design
Face.Under conditions of being 605 DEG C/623 DEG C in current ultra-supercritical boiler main flow superheated steam and reheat steam temperature parameter, burner hearth
Water-cooling wall tubing has been needed from this high-pressure boiler alloy pipes of 12Cr1MoVG.When boiler overheating steam and reheated steam
Temperature parameter improves 630 DEG C, or even during to 650 DEG C/650 DEG C of temperature levels, if still followed using both the above routine burner hearth
Loop systems loop design, its limitation in the control of each loop carbonated drink deviation has caused this high pressures of 12Cr1MoVG
Boiler compo pipe can not meet the intensity requirement under the conditions of temperature, pressure higher, it is therefore necessary to by the upgrading of furnace water cooling wall material
To T23, T24 even the high pressure alloy pipe of the greater degree such as T91.But these tubing are applied to the workshop of pattern water-cooling wall
Manufacture especially all has the technological problemses of up to the present not yet complete customer service, wherein T23 tubing in field-mounted process
At home and abroad all once because these technological problemses occurred substantial amounts of industrial accident in actual motion, cause domestic each
Individual thermal power generation corporations clearly forbid being used as T23 materials the selection of water-cooling wall during equipment purchase.
In more high parameter（630 DEG C and ratings above）Ultra-supercritical boiler in using greater degree material as burner hearth
The use material of water-cooling wall, is faced with a series of technology problems such as manufacture processing and in-site installation, especially building-site peace
The technical problem of dress is so far without very reliable and effective solution, even if having found feasible technical solution in the future,
The manufacture installation cost of boiler plant will be greatly improved.
The content of the invention
The purpose of the present invention is the design from boiler water wall circulatory system loop, using new burner hearth loop division
And connected mode, when boiler overheating steam and reheat steam temperature parameter improve the temperature levels to 630 DEG C and ratings above,
Farthest reduce every heating power deviation of the water-cooling wall circulatory system, reduction water-cooling wall pipe is under the conditions of various operating conditions
In the thermal extremes that are likely to occur, by temperature control within the scope of the temperature of 12Cr1MoVG tubing is using limitation, in more senior staff officer
But avoid being manufactured and mounting process using the grades such as T23, T24 and T91 water-cooling wall higher on several Ultra Supercritical Boiler Designs
Still jejune material, reaches the purpose that can ensure the stable operation of boiler long-term safety and effectively reduce manufacture and installation cost.
In order to realize object of the invention it is proposed following technical scheme：
Ultra-high parameter ultra-supercritical boiler three-stage burner hearth, the boiler three-stage burner hearth is designed using upper, middle and lower segment formula,
The helix tube chamber structure that the lower furnace portion and middle part are constituted using helical water-cooled wall pipe, top uses vertical water-wall tube structure
Into vertical tube configuration, respectively lower part helical burner hearth 1, middle spiral burner hearth 2 and upper vertical burner hearth 3 from the bottom up.
There are four connection headers 4, positioned at burner hearth surrounding between the lower part helical burner hearth 1 and middle spiral burner hearth 2；Should
Connection header 4 is the outlet header of lower part helical burner hearth 1, while being also the import header of middle spiral burner hearth 2, lower part helical stove
The working medium that thorax 1 is drawn carries out first time mixing in the connection header 4, and mixed working medium enters middle spiral burner hearth 2；
There are burner hearth outlet header 7 and four upper furnaces in the middle part of in the of four between the middle spiral burner hearth 2 and upper vertical burner hearth 3
Thorax import header 8, positioned at burner hearth surrounding；There are middle and upper part burner hearth connecting tube 6, burner hearth both sides on each middle part burner hearth outlet header 7
Two middle and upper part burner hearth mixing headers 5 are provided with, the working medium imported by middle and upper part burner hearth connecting tube 6 is in middle and upper part burner hearth mixing header
5 carry out second mixing；Mixed working medium imports upper furnace import header 8 by middle and upper part burner hearth connecting tube 6 again, and from
Upper vertical burner hearth 3 is introduced in upper furnace import header 8.
The present invention is designed by the way that burner hearth is changed into three-stage, can greatly improve the height of the less spiral burner hearth of thermal deviation,
The height of the larger vertical burner hearth of thermal deviation is reduced, and by increasing mixed once process, effectively reduces each circulation of carbonated drink side
Heating power deviation between loop, reaches and controls in 12Cr1MoVG tubing allowable temperatures the wall temperature of water-cooling wall under extreme operating condition
Within the scope of.
The present invention is using 12Cr1MoVG tubing highly developed in manufacture and mounting technique as large-scale power station coal dust pot
The use material of stove burner hearth, can greatly reduce device fabrication and the cost installed, and improve the safety and reliability of boiler operatiopn；Simultaneously
This design is not only applicable on the ultra-high parameter ultra-supercritical boiler of 630 DEG C of temperature grade and ratings above, for those
Easily coking coal is used, it is necessary to the overcritical single reheat boiler of the high parameter for designing larger combustion space and double reheat boiler
There is larger value；This design is improving the adaptability of coal of the pulverized-coal fired boiler to different coking properties, to prevent
While coke heavy situation occurs to provide advantage in running, can preferably ensure boiler furnace water circulation system
Hydrodynamic force safety.
Brief description of the drawings
Fig. 1 is to mix low deviation burner hearth water circulation system three stage structure schematic diagram twice.
Wherein：
1 lower part helical burner hearth, 2 middle spiral burner hearths, 3 upper vertical burner hearths, 4 connection headers, 5 middle and upper part burner hearth mixing headers, 6
Middle and upper part burner hearth connecting tube, 7 middle part burner hearth outlet headers, 8 upper furnace import headers.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with the drawings and specific embodiments,
The present invention is described in more detail.
The present embodiment solution is on the basis of the horizontal 1000MW ultra-supercritical boilers scheme in Zhoushan six, for solution is higher
The boiler furnace hydrodynamic force safety issue of parameter and develop.The horizontal 1000MW ultra-supercritical boilers in Zhoushan six are conventional super
Supercritical parameter, major parameter is main vapour pressure 27.5MPa, 603 DEG C of Stream temperature degree, 605 DEG C of reheat steam temperature.Work as boiler main
Vapour and reheat steam temperature bring up to 630 DEG C and temperatures above grade, and main vapour pressure is improved during to more than 32MPa, existing pot
Stove burner hearth common pipe materials（Such as T12,15CrMoG, 12Cr1MoVG）Burner hearth hydrodynamic force security requirement can not have been met.And
Installation technical difficulty is big at the scene for the tubing of greater degree, and technique is still immature.In order to solve this restriction boiler to more
The technical bottleneck of high parameter development, on the basis of original routine Ultra Supercritical Boiler thorax design, develops this three-stage low partially
Difference chamber structure form, to reach at utmost reduction burner hearth heating power deviation, reduces material running temperature level, it is to avoid using more
The purpose of the still jejune material of high-grade but technical matters so that existing conventional burner hearth material（As T12,15CrMoG,
12Cr1MoVG etc.）Remain to meet hydrodynamic security requirement on 630 DEG C and ratings above boiler.
Fig. 1 is to mix low deviation burner hearth water circulation system three stage structure schematic diagram twice as illustrated, in boiler furnace
On to realize that the Hydrodynamic design of temperature low deviation between each loop must use following measure:
Burner hearth is designed using upper, middle and lower segment formula, and lower furnace portion and middle part use helix tube chamber structure, and top is using vertical
Tubular construction.
Working medium rises to certain height and is drawn in the lower part helical burner hearth 1 being made up of spiralling water screen tube
Go out, four into burner hearth surrounding connect header 4, and the header is the outlet header of lower part helical burner hearth while being also middle part spiral shell
Revolve the import header of burner hearth.Working medium carries out first time mixing in the header, reduces each loop working medium of lower furnace and is inhaled in flowing
The heating power deviation formed in thermal process.Mixed working medium is guided by water screen tube, into middle spiral burner hearth 2.
Working medium rises to certain height and is drawn in the middle spiral burner hearth 2 being made up of spiralling water screen tube
Go out, into four of burner hearth surrounding middle part burner hearth outlet headers 7.There is a number of middle and upper part burner hearth to connect in each middle part header
Working medium is imported adapter 6, these connecting tubes two middle and upper part burner hearth mixing headers 5 for being located at burner hearth both sides, and working medium collects in mixing
Second mixing is carried out in case, the heating power deviation that each loop working medium is formed in middle spiral burner hearth 2 is reduced.Mixed working medium
Imported by a number of middle and upper part burner hearth connecting tube 6 again and be located at four upper furnace import headers 8 around burner hearth, and from
Vertical water-wall tube is drawn in upper furnace import header 8 and constitutes upper vertical burner hearth 3.
By hydrodynamic force typical case's two-piece design of more conventional upper lower hearth, burner hearth is changed to three-stage design, can be significantly
The height of the less spiral burner hearth of thermal deviation is improved, the height of the larger vertical burner hearth of thermal deviation is reduced, and unconventional increase is once
Mixed process, can effectively reduce the heating power deviation between each circulation loop of carbonated drink side.Specified according to national associated materials standard,
The maximum operation (service) temperature of 12Cr1MoVG tubing not above 580 DEG C, according to new three-stage burner hearth structure design, can be by water-cooled
Wall highest calculates wall temperature control below 580 DEG C, reaches the wall temperature control of water-cooling wall under extreme operating condition in 12Cr1MoVG pipes
Purpose within the scope of material allowable temperature.
The three-stage burner hearth method for designing is used for the pulverized-coal fired boiler of 630 DEG C of large-scale power station ultra supercritical and temperatures above grade
In hydrodynamic force safety Design.
Particular embodiments described above, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the invention,
All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc., should be included in of the invention
Within protection domain.
Claims (2)
1. ultra-high parameter ultra-supercritical boiler three-stage burner hearth, it is characterised in that：
The boiler three-stage burner hearth is designed using upper, middle and lower segment formula, and lower furnace portion and middle part use helical water-cooled wall pipe structure
Into helix tube chamber structure, the vertical tube configuration that top is constituted using vertical water-wall tube, from the bottom up respectively bottom spiral shell
Rotation burner hearth（1）, middle spiral burner hearth（2）With upper vertical burner hearth（3）.
2. ultra-high parameter ultra-supercritical boiler three-stage burner hearth according to claim 1, it is characterised in that：
The lower part helical burner hearth（1）With middle spiral burner hearth（2）Between have four connection headers（4）, positioned at burner hearth surrounding；
The connection header（4）It is lower part helical burner hearth（1）Outlet header, while being also middle spiral burner hearth（2）Import header, under
Portion's spiral burner hearth（1）The working medium of extraction is in the connection header（4）In carry out first time mixing, mixed working medium enters middle part spiral shell
Rotation burner hearth（2）；
The middle spiral burner hearth（2）With upper vertical burner hearth（3）Between have four middle part burner hearth outlet headers（7）With four
Upper furnace import header（8）, positioned at burner hearth surrounding；Each middle part burner hearth outlet header（7）On have middle and upper part burner hearth connecting tube
（6）, burner hearth both sides are provided with two middle and upper part burner hearth mixing headers（5）, by middle and upper part burner hearth connecting tube（6）The working medium of importing is in
Upper furnace mixing header（5）Carry out second mixing；Mixed working medium passes through middle and upper part burner hearth connecting tube again（6）In importing
Portion's burner hearth import header（8）, and from upper furnace import header（8）Upper introducing upper vertical burner hearth（3）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072036.6A CN106765013B (en) | 2016-11-29 | 2016-11-29 | Ultra-high parameter ultra-supercritical boiler three-stage burner hearth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072036.6A CN106765013B (en) | 2016-11-29 | 2016-11-29 | Ultra-high parameter ultra-supercritical boiler three-stage burner hearth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106765013A true CN106765013A (en) | 2017-05-31 |
| CN106765013B CN106765013B (en) | 2018-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611072036.6A Active CN106765013B (en) | 2016-11-29 | 2016-11-29 | Ultra-high parameter ultra-supercritical boiler three-stage burner hearth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023221609A1 (en) * | 2022-05-16 | 2023-11-23 | 东方电气集团东方锅炉股份有限公司 | Boiler furnace with steam-cooled wall, and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1672278A1 (en) * | 2004-12-01 | 2006-06-21 | Alpiterm d.o.o. | Condensing heating apparatus |
| CN101586802A (en) * | 2009-06-23 | 2009-11-25 | 东方锅炉（集团）股份有限公司 | Water wall of monotube boiler |
| CN105627283A (en) * | 2016-01-20 | 2016-06-01 | 华能国际电力股份有限公司 | Steam system suitable for power station boiler with steam parameter of 700 DEG C grade and above |
| CN205592928U (en) * | 2016-05-07 | 2016-09-21 | 中国能源建设集团东北电力第一工程有限公司 | Boiler spiral water -cooling wall structure of big power station |
-
2016
- 2016-11-29 CN CN201611072036.6A patent/CN106765013B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1672278A1 (en) * | 2004-12-01 | 2006-06-21 | Alpiterm d.o.o. | Condensing heating apparatus |
| CN101586802A (en) * | 2009-06-23 | 2009-11-25 | 东方锅炉（集团）股份有限公司 | Water wall of monotube boiler |
| CN105627283A (en) * | 2016-01-20 | 2016-06-01 | 华能国际电力股份有限公司 | Steam system suitable for power station boiler with steam parameter of 700 DEG C grade and above |
| CN205592928U (en) * | 2016-05-07 | 2016-09-21 | 中国能源建设集团东北电力第一工程有限公司 | Boiler spiral water -cooling wall structure of big power station |
Non-Patent Citations (1)
| Title |
|---|
| 王引龙 等: "超临界锅炉水冷壁安装", 《锅炉制造》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023221609A1 (en) * | 2022-05-16 | 2023-11-23 | 东方电气集团东方锅炉股份有限公司 | Boiler furnace with steam-cooled wall, and system |
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| Publication number | Publication date |
|---|---|
| CN106765013B (en) | 2018-11-30 |
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