CN107489998A - A kind of effect that can put forward Sub-critical Parameter grade is to the boiler of ultra supercritical parameter grade - Google Patents
A kind of effect that can put forward Sub-critical Parameter grade is to the boiler of ultra supercritical parameter grade Download PDFInfo
- Publication number
- CN107489998A CN107489998A CN201710904340.0A CN201710904340A CN107489998A CN 107489998 A CN107489998 A CN 107489998A CN 201710904340 A CN201710904340 A CN 201710904340A CN 107489998 A CN107489998 A CN 107489998A
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- China
- Prior art keywords
- superheater
- reheater
- low temperature
- parameter grade
- connects
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/003—Feed-water heater systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
- F22G1/02—Steam superheating characterised by heating method with heat supply by hot flue gases from the furnace of the steam boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
- F22G7/12—Steam superheaters characterised by location, arrangement, or disposition in flues
Abstract
A kind of effect that can put forward Sub-critical Parameter grade is characterized in that to the boiler of ultra supercritical parameter grade：Including burner hearth and flue, in burner hearth wall reheater is provided with top, division pendant superheater and Late reworking, rear panel reheater is provided with the connection position of burner hearth and flue, final reheater and finishing superheater, vertical low temperature overheater is provided with flue, horizontal low temperature superheater and reheater, wall reheater connects division pendant superheater and rear panel reheater, division pendant superheater connects Late reworking, Late reworking connects rear panel reheater and finishing superheater, rear panel reheater connects final reheater, final reheater connects finishing superheater, finishing superheater connects vertical low temperature overheater, vertical low temperature overheater connects division pendant superheater and horizontal low temperature superheater, horizontal low temperature superheater connects economizer.Sub-critical Parameter grade can be promoted to ultra supercritical parameter grade by the present invention, improve boiler efficiency, reduce coal consumption, reduce pollutant emission.
Description
Technical field：
The present invention relates to boiler of power plant field, and in particular to Sub-critical Parameter grade can be carried effect to ultra supercritical and joined by one kind
The boiler of number grade.
Background technology：
One of the characteristics of modern thermal power plant develops shows as high parameter, Large Copacity, and China opens from the nineties in last century
Beginning greatly develops Subcritical Units, and wherein capacity includes 300MW grades and 600MW grades, and its quantity accounts for China's generator installation
It is most of；Initial stage in 2000, China started to greatly develop the supercritical unit that capacity is 600MW grades；Since 2006, surpass
The unit of overcritical grade starts to be related to 600MW grades and 1000MW grades in China's extensive development, wherein capacity；2015
First of world 660MW grade ultra supercritical double reheat power generation sets and first 1000MW grade ultra supercritical double reheat power generation sets are successive
Go into operation, realized in the industrial upgrading more in high-tech in China.
With the continuous upgrading of thermal power plant industry, China's early stage subcritical coal unit has been gone into operation nearly 20 years, even
More than 20 years, technology substantially falls behind, and the subcritical coal unit of active service, is influenceed by low, low heating value coal of design parameter etc.
Factor, coal consumption are generally higher than 320g/kwh, and it is big coal consumption to be present, and pollutant emission is not up to standard, the problems such as unit economy difference, therefore
Upgrading need to be carried out to the subcritical coal unit of active service, and the horizontal relatively low Subcritical Units of efficiency need to turn into what is primarily transformed
Object, it is difficult big using conventional technique transformation means (such as steam turbine Tong Liao area measure) due to being limited by unit parameter
Amplitude improves unit efficiency level, and therefore, Subcritical Units parameter level can be promoted to extra-supercritical unit ginseng by seeking one kind
The modification scheme of number grade is necessary.
The content of the invention：
The present invention is overcomes above mentioned problem, there is provided one kind can put forward Sub-critical Parameter grade effect to ultra supercritical parameter etc.
The boiler of level, it can vapour parameter be promoted to from 540 DEG C of grades 600 DEG C of ultra supercritical parameter etc. again by the main vapour of Subcritical Units
Level, boiler efficiency is improved, reduce coal consumption, reduce pollutant emission, improve economy.
The present invention Sub-critical Parameter grade can be carried effect to ultra supercritical parameter grade boiler, to achieve the above object
Used technical scheme is：The flue connected including burner hearth and with burner hearth, burner hearth is interior to be set gradually from left to right in top
There are wall reheater, division pendant superheater and a Late reworking, set gradually from left to right in the connection position of burner hearth and flue
There are rear panel reheater, final reheater and finishing superheater, vertical low temperature overheater, water are disposed with from top to bottom in flue
Flat low temperature superheater, economizer.Wall reheater connects division pendant superheater and rear panel reheater, after division pendant superheater connection
Shield superheater, Late reworking connection rear panel reheater and finishing superheater, rear panel reheater connection final reheater, final stage is again
Hot device connects finishing superheater, finishing superheater connection vertical low temperature overheater, vertical low temperature overheater connection panel superheater overheat
Device and horizontal low temperature superheater, horizontal low temperature superheater connect economizer.
As a further improvement on the present invention, the wall reheater can be toward extending certain distance in stove.It is arranged such,
The contact area of flue gas and wall reheater can be increased, increase the temperature lowering effect of the fume side of wall reheater, improve wall again
The outlet temperature of hot device working medium.
As a further improvement on the present invention, the vertical low temperature overheater be two groups or increase by one around.It is arranged such,
The contact area of flue gas and the vertical low temperature overheater equipped with water, the cooling effect of increase vertical low temperature overheater fume side can be extended
Fruit, improve the outlet temperature of vertical low temperature overheater working medium.
As a further improvement on the present invention, horizontal low temperature superheater is four groups.It is arranged such, flue gas can be extended with being equipped with
The contact area of the horizontal low temperature superheater of water, increase the fume side cooling-down effect of vertical low temperature overheater, low temperature of improving the standard
The outlet temperature of superheater working medium.
As a further improvement on the present invention, the economizer is changed to arrange in H types by lighting tube-type arrangement.It is arranged such,
Space can be saved, one times of contact area with flue gas is increased in same space, increases the heat transfer effect of economizer, improves and saves
Coal device exports the outlet temperature of working medium.
The beneficial effects of the invention are as follows：Subcritical Units carbonated drink parameter can be promoted to 600 DEG C by the present invention from 540 DEG C of grades
Ultra supercritical parameter grade, according to new match parameter, main steam flow reduces, and wall reheater, division pendant superheater, rear screen are again
The throttle (steam) temperature of hot device and final reheater is improved, and water-cooling wall heat absorption is reduced, and the heat absorption of Late reworking and finishing superheater increases
Add, the heat absorption of wall reheater, division pendant superheater, rear panel reheater and final reheater increases, the power supply coal before not transforming
Consumption reduces about 24.5%, can significantly dropped in more than 320g/kw.h, engineered rear net coal consumption rate about below 285g/kw.h, Coal-fired capacity
Low unit coal consumption, generatine set heat efficiency about 0.3% is improved, substantially increases the economy of power plant, while reduce the row of pollutant
Put.
Brief description of the drawings：
Fig. 1 is the structural representation of the present invention.
Embodiment：
Reference picture 1, of the invention can put forward Sub-critical Parameter grade effect to the boiler of ultra supercritical parameter grade, including stove
Thorax 1, flue 11, wall reheater 2, division pendant superheater 3, Late reworking 4, rear panel reheater 5, final reheater 6, final stage
Superheater 7 and economizer 8, burner hearth 1 are connected with flue 11, and wall reheating is disposed with from left to right in top in burner hearth 1
After being disposed with from left to right in the connection position of device 2, division pendant superheater 3 and Late reworking 4, burner hearth 1 and flue 11
Shield reheater 5, final reheater 6 and finishing superheater 7, vertical low temperature overheater 9, water are disposed with from top to bottom in flue
Flat low temperature superheater 10 and economizer, wall reheater 2 connect division pendant superheater 3 and rear panel reheater 5, division pendant superheater
3 connection Late reworkings 4, Late reworking 4 connect rear panel reheater 5 and final reheater 6, and rear panel reheater 5 connects final stage
Reheater 6, final reheater 6 connect finishing superheater 7, and finishing superheater 7 connects vertical low temperature overheater 9, vertical low temperature mistake
Hot device 9 connects division pendant superheater 3 and horizontal low temperature superheater 10, and horizontal low temperature superheater 10 connects economizer 8.Vertical low temperature
Superheater 9 is provided with two groups, and horizontal low temperature superheater 10 is provided with 4 groups, and economizer 8 is arranged in H types.
The left and right sides of the burner hearth 1 is provided with water-cooling wall 14, and water-cooling wall 14 is by down-comer 13 with being located at the outside of burner hearth 1
Drum 12 connects；The left and right sides of the flue 11 is provided with front and rear bag wall 15.
Burner hearth 1- is used for fired coal combustion, and ensures that water-cooling wall is carried out under relatively adiabatic environment.And the flue gas after burning
Up circulate.
The high pressure cylinder of wall reheater 2- turbine systems finishes the low pressure steam after work(, enters the progress of in-wall reheater
Heating, both walls and front wall are arranged with heating surface.
Division pendant superheater 3-, which is used to heat from vertical low temperature overheater heating, finishes steam introducing division pendant superheater, enters
Row further heating.
Late reworking 4- introduces Late reworking for heating the steam finished from panel superheater heating, further add
Heat, lift vapor (steam) temperature.
Finishing superheater 7- is used to heat the steam introducing finishing superheater finished from Late reworking heating, is heated
Reach target temperature.And target temperature introducing high pressure cylinder is done work.
Rear panel reheater 5- is used for the steam that heating finishes from the heating of wall reheater and is incorporated into rear panel reheater, is added
Heat, further lift vapor (steam) temperature.
Final reheater 6- is used for the steam that heating finishes from rear panel reheater heating and is incorporated into final reheater, is added
Heat reaches target vapor temperature, and during target temperature is incorporated into, low pressure (LP) cylinder done work.
The feedwater that economizer 8- comes from feed pump, after the heating of high and low pressure heater, enter back into economizer 8 and heat,
Steam after heating introduces drum 12.And original light pipe economizer is changed to H type economizers, increase heat exchange area, and save
Space.
The steam that vertical low temperature overheater 9- finishes from the heating of horizontal low temperature superheater enters one into vertical low temperature overheater
Step heating, because vertical low temperature overheater space is larger, the heating surface area of vertical low temperature overheater can be increased, increase heat exchange.
Horizontal low temperature superheater 10- is heated from the steam after the heating of front and rear bag wall 15 into horizontal low temperature superheater.
First, carbonated drink flow：
1st, superheater system：Boiler feedwater is through bag wall 15- water before and after economizer 8- drum 12- down-comer 13- water-cooling walls 14-
Flat low temperature superheater 10- vertical low temperature overheaters 9- division pendant superheater 3- Late reworking 4- finishing superheaters 6；
2nd, reheater system：The steam of work(is finished from high pressure cylinder, enters in-wall reheater 2- rear panel reheater 5- final stages again
Hot device 6；
2nd, flue gas flow：
Fired coal combustion, flue gas shield reheating after flowing through burner hearth 1- wall reheater 2- division pendant superheater 3- Late reworkings 4-
The horizontal low temperature superheater 10- economizers 8 of device 5- final reheater 6- finishing superheater 7- vertical low temperature overheaters 9-, finally by cigarette
Gas outlet discharge.
By the main vapour of Subcritical Units, vapour parameter is promoted to 600 DEG C of grades to the present invention from 540 DEG C of grades again, keeps drum pressure
Constant, according to new match parameter, main steam flow reduces, wall reheater 2, division pendant superheater 3, rear panel reheater 5 and final stage
The throttle (steam) temperature of reheater 6 is improved, and water-cooling wall heat absorption is reduced, the heat absorption increase of Late reworking 4 and finishing superheater 7, wall
The heat absorption of reheater 2, division pendant superheater 3, rear panel reheater 5 and final reheater 6 increases, and in order to reduce improvement cost, examines
Consider space, increase the area of finishing superheater 7 and the area of horizontal low temperature superheater 10, while wall reheater 2, shield reheating afterwards
The heating surface of device 5 and final reheater 6 need to carry out material upshift, and end crosses exit portion and uses TP347H.Part header, pipeline and
Other need to be changed for connecting tube, valve etc., to ensure unit safety operation, effectively can be put forward 540 DEG C of grades of Sub-critical Parameter
Imitate to the boiler of 600 DEG C of grades of ultra supercritical parameter, specific effect is referring to table one.
The major parameter table of table one
Claims (4)
1. a kind of effect that can put forward Sub-critical Parameter grade is to the boiler of ultra supercritical parameter grade, it is characterised in that：Including burner hearth
(1) flue (11) and with burner hearth (1) connected, in burner hearth (1) in top be disposed with from left to right wall reheater (2),
Division pendant superheater (3) and Late reworking (4), burner hearth (1) with setting gradually from left to right in the connection position of flue (11)
There are rear panel reheater (5), final reheater (6) and finishing superheater (7), vertical low temperature is disposed with from top to bottom in flue
Superheater (9), horizontal low temperature superheater (10) and reheater, wall reheater (2) connection division pendant superheater (3) and rear screen are again
Hot device (5), division pendant superheater (3) connection Late reworking (4), Late reworking (4) connection rear panel reheater (5) and final stage
Superheater (6), rear panel reheater (5) connection final reheater (6), final reheater (6) connection finishing superheater (7), final stage
Superheater (7) connection vertical low temperature overheater (9), vertical low temperature overheater (9) connection division pendant superheater (3) and horizontal low temperature
Superheater (10), horizontal low temperature superheater (10) connection economizer (8).
2. a kind of can put forward Sub-critical Parameter grade as claimed in claim 1 is imitated to the boiler of ultra supercritical parameter grade, its
It is characterised by：The vertical low temperature overheater (9) is two groups.
3. a kind of can put forward Sub-critical Parameter grade as claimed in claim 1 is imitated to the boiler of ultra supercritical parameter grade, its
It is characterised by：Horizontal low temperature superheater (10) is four groups.
4. one kind as described in claim 1-3 any one can put forward Sub-critical Parameter grade effect to ultra supercritical parameter etc.
The boiler of level, it is characterised in that：The light pipe of the economizer (8) is arranged in H types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710904340.0A CN107489998A (en) | 2017-09-28 | 2017-09-28 | A kind of effect that can put forward Sub-critical Parameter grade is to the boiler of ultra supercritical parameter grade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710904340.0A CN107489998A (en) | 2017-09-28 | 2017-09-28 | A kind of effect that can put forward Sub-critical Parameter grade is to the boiler of ultra supercritical parameter grade |
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| Publication Number | Publication Date |
|---|---|
| CN107489998A true CN107489998A (en) | 2017-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710904340.0A Pending CN107489998A (en) | 2017-09-28 | 2017-09-28 | A kind of effect that can put forward Sub-critical Parameter grade is to the boiler of ultra supercritical parameter grade |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224407A (en) * | 2018-01-10 | 2018-06-29 | 哈尔滨锅炉厂有限责任公司 | A kind of device for promoting super critical boiler superheater vapor (steam) temperature |
| CN111964030A (en) * | 2020-08-25 | 2020-11-20 | 哈尔滨锅炉厂有限责任公司 | Heating surface embedded system capable of adapting to multi-proportion lignite mixed combustion of supercritical boiler |
| CN112628709A (en) * | 2020-12-28 | 2021-04-09 | 东方电气集团东方锅炉股份有限公司 | Super (super) critical W-shaped flame boiler |
| CN114543065A (en) * | 2022-03-18 | 2022-05-27 | 清华大学 | Thermal power plant unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201246735Y (en) * | 2008-08-01 | 2009-05-27 | 中国神华能源股份有限公司 | Coal-burning boiler with vertical low temperature overheater |
| CN102434869A (en) * | 2011-12-21 | 2012-05-02 | 哈尔滨锅炉厂有限责任公司 | 200MW ultrahigh-pressure medium-speed milling lignite-fired boiler |
| CN202419628U (en) * | 2012-02-02 | 2012-09-05 | 哈尔滨锅炉厂有限责任公司 | 300MW mixed-burning high furnace gas boiler |
| CN205102104U (en) * | 2015-10-21 | 2016-03-23 | 安徽淮南平圩发电有限责任公司 | Overcritical boiler |
-
2017
- 2017-09-28 CN CN201710904340.0A patent/CN107489998A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201246735Y (en) * | 2008-08-01 | 2009-05-27 | 中国神华能源股份有限公司 | Coal-burning boiler with vertical low temperature overheater |
| CN102434869A (en) * | 2011-12-21 | 2012-05-02 | 哈尔滨锅炉厂有限责任公司 | 200MW ultrahigh-pressure medium-speed milling lignite-fired boiler |
| CN202419628U (en) * | 2012-02-02 | 2012-09-05 | 哈尔滨锅炉厂有限责任公司 | 300MW mixed-burning high furnace gas boiler |
| CN205102104U (en) * | 2015-10-21 | 2016-03-23 | 安徽淮南平圩发电有限责任公司 | Overcritical boiler |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224407A (en) * | 2018-01-10 | 2018-06-29 | 哈尔滨锅炉厂有限责任公司 | A kind of device for promoting super critical boiler superheater vapor (steam) temperature |
| CN111964030A (en) * | 2020-08-25 | 2020-11-20 | 哈尔滨锅炉厂有限责任公司 | Heating surface embedded system capable of adapting to multi-proportion lignite mixed combustion of supercritical boiler |
| CN111964030B (en) * | 2020-08-25 | 2022-02-08 | 哈尔滨锅炉厂有限责任公司 | Heating surface embedded system capable of adapting to multi-proportion lignite mixed combustion of supercritical boiler |
| CN112628709A (en) * | 2020-12-28 | 2021-04-09 | 东方电气集团东方锅炉股份有限公司 | Super (super) critical W-shaped flame boiler |
| CN114543065A (en) * | 2022-03-18 | 2022-05-27 | 清华大学 | Thermal power plant unit |
| CN114543065B (en) * | 2022-03-18 | 2023-01-10 | 清华大学 | Thermal power plant unit |
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Application publication date: 20171219 |