CN106090865B - A kind of supercritical carbon dioxide Boiler radiation heated surface arrangement method - Google Patents
A kind of supercritical carbon dioxide Boiler radiation heated surface arrangement method Download PDFInfo
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- CN106090865B CN106090865B CN201610654055.3A CN201610654055A CN106090865B CN 106090865 B CN106090865 B CN 106090865B CN 201610654055 A CN201610654055 A CN 201610654055A CN 106090865 B CN106090865 B CN 106090865B
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- radiation heating
- working medium
- carbon dioxide
- medium radiation
- burner
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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
- 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
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- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a kind of method for arranging of supercritical carbon dioxide Boiler radiation heating surface water-cooling wall, and main working medium radiation heating-surface and reheating working medium radiation heating-surface are arranged in burner hearth.Wherein main working medium radiation heating-surface is arranged in burner region, the region above burner and furnace roof, reheating working medium radiation heating-surface and is arranged in region and dry bottom hopper region below burner.The method for arranging makes the entrance of winner's working medium radiation heating-surface be located just at the region near burner, it will entirely the minimum pipeline section of Temperature of Working be arranged in along the furnace height direction highest region of Load Distribution coefficient in burner hearth, effectively solve the problems, such as that high parameter supercritical carbon dioxide Boiler radiation heating surface tube wall temperature is excessively high, the safety of boiler is improved, and reduces requirement of the supercritical carbon dioxide Boiler radiation heating surface to high temperature metallic material.
Description
Technical field
The invention belongs to the efficient field of thermal power of supercritical carbon dioxide Brayton cycle, and in particular to a kind of overcritical
Carbon dioxide Boiler radiation heated surface arrangement method.
Background technology
Supercritical carbon dioxide Brayton cycle is one of most potential advanced power cycle generally acknowledged at present.Due to super
Critical carbon dioxide has the characteristics that energy density is big, heat transfer efficiency is high, supercritical carbon dioxide Brayton cycle efficiency power generation
System can reach the efficiency of 700 DEG C of conventional steam Rankine cycle in 620 DEG C of temperature ranges, not need to novel height of redeveloping
Temperature alloy, and equipment size is less than the steam unit of same parameter, application prospect is very good.
The composition feature of China's energy reserves determines that coal motor group is still China's power industry in coming few decades
Therefore main force, supercritical carbon dioxide Brayton cycle is applied and is tallied with the national condition very much in Thermal generation unit, is me
One of technology path of great potential in state's power industry energy-saving and emission-reduction.It is sent out as supercritical carbon dioxide Brayton cycle fire coal
The core equipment of motor group, the security relationship of supercritical carbon dioxide boiler surpass and face to the stable operation of the entire circulatory system
The construction cost of boundary's carbon dioxide boiler is also the pith of entire electricity generation system initial cost.Therefore, how by rational
Heating surface arranges that the long-term safety operation that can reduce boiler cost and boiler is coal base supercritical carbon dioxide hair
One of difficult point of power technology.
Due to the difference and Brayton cycle of carbon dioxide and water physical property and the difference of Rankine cycle, overcritical dioxy
Changing carbon boiler and traditional supercritical steam boiler has apparent difference.Marked difference is the most for one of them:Dioxy
Change that regenerator heat exchange amount in carbon Brayton cycle is very big, and high pressure Biological process is heated to very high temperature by turbine lack of gas could be into
Enter boiler, so the temperature of supercritical carbon dioxide boiler inlet working medium is far above the steam boiler of same parameter.With 25MPa,
For 600/600/32 DEG C of systematic parameter, the boiler inlet Temperature of Working for the supercritical steam boiler of Rankine cycle is
300~320 DEG C or so, and for the boiler of supercritical carbon dioxide Brayton cycle, boiler inlet Temperature of Working is about
It is 500~530 DEG C.Therefore, the tube wall temperature of carbon dioxide Boiler radiation heating surface will be apparently higher than the steam boiler of same parameter.
In addition, in steam boiler burner hearth in the high region of Load Distribution coefficient, working medium is in large specific heat region, heat exchange system in water-cooling wall
Number is significantly higher, and in the burner hearth of supercritical carbon dioxide boiler in the higher region of Load Distribution coefficient, radiation is heated
Working medium works in the region far from large specific heat region in face (being equivalent to steam boiler water-cooling wall), the coefficient of heat transfer only about steam copper
The 1/2~1/5 of stove water-cooling wall, this is easier the temperature mistake for leading to supercritical carbon dioxide Boiler radiation heating surface metal pipe-wall
It is high.Therefore, for supercritical carbon dioxide boiler the characteristics of, reduces radiation heating-surface as far as possible by rational heating surface arrangement
Tube wall temperature it is just very necessary.
However rarely have open achievement and patent introduction to be related to solving high parameter supercritical carbon dioxide pot both at home and abroad at present
The excessively high method of stove water-cooling wall part wall temperature.
Invention content
The purpose of the present invention is the problem of supercritical carbon dioxide water screen tube wall temperature solved is excessively high, is provided a kind of super
Critical carbon dioxide Boiler radiation heated surface arrangement method, this method can effectively reduce high parameter supercritical carbon dioxide boiler
Wall temperature difference of the main working medium radiation heating-surface tube wall temperature along furnace height direction, reduces main working medium radiation heating-surface tube wall temperature
Peak value.
In order to achieve the above objectives, the technical solution adopted in the present invention is:
A kind of supercritical carbon dioxide Boiler radiation heated surface arrangement method, the radiation heating-surface arranged in burner hearth, spoke
It penetrates heating surface and includes reheating working medium radiation heating-surface and main working medium radiation heating-surface, reheating working medium radiation heating-surface is with thermal technology again
Matter radiation heating-surface entrance and the outlet of reheating working medium radiation heating-surface, main working medium radiation heating-surface carry main working medium radiation heating-surface
Entrance and the outlet of main working medium radiation heating-surface;Wherein, main working medium radiation heating-surface is arranged in the peripheral region of burner, burner
Upper area and furnace roof, reheating working medium radiation heating-surface is arranged in the lower zone of burner and dry bottom hopper region.
The reheating working medium radiation heating-surface and main working medium radiation heating-surface use the structure of fin panel casing.
It is connected between the reheating working medium radiation heating-surface and main working medium radiation heating-surface by expansion joint.
The main working medium radiation heating-surface entrance is arranged in the position of L/10~L/15 below burner, and wherein L is burner hearth
Highly, main working medium radiation heating-surface outlet is arranged in furnace roof.
The reheating working medium radiation heating-surface entrance is arranged in furnace bottom, and the outlet of reheating working medium radiation heating-surface is arranged in main work
The lower section of matter radiation heating-surface entrance.
Compared with prior art, the invention has the advantages that:Present invention employs novel radiation heating-surface cloth
It puts method to arrange heating surface inside supercritical carbon dioxide boiler furnace, especially arranges main working medium radiation heating-surface
Region and furnace roof above burner region, burner, reheating working medium radiation heating-surface are arranged in the region below burner
And dry bottom hopper region.In the method for arranging, the minimum radiation heating-surface of Temperature of Working in burner hearth --- main working medium radiation is heated
The entrance in face has been disposed in the highest burner neighboring area of Load Distribution coefficient in burner hearth, and Temperature of Working in burner hearth
Highest radiation heating-surface --- the outlet section of main working medium radiation heating-surface has been disposed in burner hearth Load Distribution coefficient most
Low furnace roof region.By using this new method for arranging, high parameter supercritical carbon dioxide boiler master is effectively reduced
Wall temperature difference of the working medium radiation heating-surface tube wall temperature along furnace height direction, reduces main working medium radiation heating-surface tube wall temperature
Peak value while the safety for improving supercritical carbon dioxide boiler, and can reduce the cost of its radiation heating-surface.
The present invention using main working medium radiation heating-surface entrance as the entrance in working medium circuit of supercritical carbon dioxide boiler,
By cancelling traditional boiler economizer, further reduced the Temperature of Working of main working medium radiation heating-surface inlet, so as into
One step reduces the tube wall temperature of the main working medium radiation heating-surface of burner region.
It, can through boiler " water " Cable Power Computation for 600/600 DEG C of 300MW supercritical carbon dioxide boilers with 25MPa
Know:During using traditional main working medium radiation heating-surface method for arranging, the wall temperature of supercritical carbon dioxide Boiler radiation heating surface is most
High point is about 640 DEG C, and during the use present invention, the wall temperature peak of supercritical carbon dioxide Boiler radiation heating surface is about 610
℃。
Description of the drawings
Fig. 1 is that the present invention applies the structure diagram in high parameter single reheat supercritical carbon dioxide π type boilers.
Wherein, 1 is reheating working medium radiation heating-surface;1-1 is reheating working medium radiation heating-surface entrance;1-2 is hot working fluid again
Radiation heating-surface exports;2 be main working medium radiation heating-surface;2-1 is main working medium radiation heating-surface entrance;2-2 is radiated for main working medium
Heating surface exports;3 be high temperature superheater;4 be high temperature reheater;5 be low-temperature reheater;6 be low temperature superheater;7 is low to shunt
Warm economizer;8 be air preheater;9 be burner.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples:
The present invention is illustrated by taking π type boilers as an example, but is not limited to π type boilers.
Referring to Fig. 1, the present invention is included in the radiation heating-surface arranged in burner hearth, and radiation heating-surface includes two parts:Reheating
Working medium radiation heating-surface 1 (being equivalent to " secondary carbonated drink cold wall ") and main working medium radiation heating-surface 2 (are equivalent to that " carbonated drink is cold
Wall ").Wherein main working medium radiation heating-surface 2 is arranged in the upper area and furnace roof of the peripheral region of burner 9, burner 9, then
Hot working fluid radiation heating-surface 1 is arranged in the lower zone of burner 9 and dry bottom hopper region.Reheating working medium radiation heating-surface 1 and master
Working medium radiation heating-surface 2 uses the structure of membrane type " water " cold wall, reheating working medium radiation heating-surface 1 and main working medium radiation heating-surface
It is connected between 2 by expansion joint.Main working medium radiation heating-surface entrance 2-1 is arranged in the position of 9 lower section about L/10~L/15 of burner
It puts (L is furnace height), main working medium radiation heating-surface outlet 2-2 is arranged in furnace roof.Reheating working medium radiation heating-surface entrance 1-1 cloth
It puts in furnace bottom, reheating working medium radiation heating-surface outlet 1-2 is arranged in the lower section of main working medium radiation heating-surface entrance 2-1.In the cloth
Put in method, the minimum radiation heating-surface of Temperature of Working in burner hearth --- the entrance of main working medium radiation heating-surface is disposed in
The highest burner neighboring area of Load Distribution coefficient in burner hearth, and the highest radiation heating-surface of Temperature of Working in burner hearth ---
The outlet section of main working medium radiation heating-surface has been disposed in the minimum furnace roof region of Load Distribution coefficient in burner hearth, this arrangement
Mode effectively reduces wall of the main working medium radiation heating-surface tube wall temperature of supercritical carbon dioxide boiler along furnace height direction
Temperature difference reduces the peak value of main working medium radiation heating-surface tube wall temperature, in the safety for improving supercritical carbon dioxide boiler
While, and the cost of its main working medium radiation heating-surface can be reduced.In addition, flue rear portion is provided with shunting low-level (stack-gas) economizer 7
With the air preheater 8 for being arranged on shunting low-level (stack-gas) economizer 7 lower section, shunting low-level (stack-gas) economizer 7 is arranged on low temperature superheater 6 and low
The lower section of warm reheater 5.
The working medium flow of main working medium:The main working medium of boiler is cold from supercritical carbon dioxide Brayton cycle high temperature regenerator
The High-pressure supercritical carbon dioxide of side outlet, the partial high pressure supercritical carbon dioxide is from main working medium radiation heating-surface entrance 2-1
It is medium followed by the highest burner region tube panel of Load Distribution coefficient, Load Distribution coefficient into boiler furnace
Burner upper area tube panel and the relatively low furnace roof tube panel of Load Distribution coefficient are drawn by main working medium radiation heating-surface outlet 2-2
To low temperature superheater 6, high temperature superheater 3 is subsequently flowed into, is heated to main " steam " design parameter.
The working medium flow of hot working fluid again:Hot working fluid is from supercritical carbon dioxide Brayton cycle high pressure turbine to boiler again
The middle pressure supercritical carbon dioxide of outlet, pressure supercritical carbon dioxide is from reheating working medium radiation heating-surface entrance 1-1 in the part
Into boiler furnace, followed by the medium burning of the relatively low dry bottom hopper tube panel of Load Distribution coefficient and Load Distribution coefficient
Device lower zone tube panel leads to low-temperature reheater 5 by reheating working medium radiation heating-surface outlet 1-2, subsequently flows into high temperature reheater
4, it is heated to reheating " steam " design parameter.
The present invention considers from the own characteristic of supercritical carbon dioxide boiler, by rational heating surface arrangement, subtracts
Wall temperature difference of the small main working medium radiation heating-surface tube wall temperature along furnace height direction, reduces main working medium radiation heating-surface tube wall temperature
The peak value of degree, improves the safety of supercritical carbon dioxide boiler, and reduce under the premise of safety is ensured main working medium radiation by
The grade of hot face metal pipe material reduces boiler cost.
Above-described specific embodiment has carried out the purpose of the present invention, technical solution and advantageous effect further
It is described in detail, it should be understood that the foregoing is merely the specific embodiment of the present invention, is not limited to this hair
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection domain within.
Claims (3)
1. a kind of supercritical carbon dioxide Boiler radiation heated surface arrangement method, it is characterised in that:The radiation arranged in burner hearth
Heating surface, radiation heating-surface include reheating working medium radiation heating-surface (1) and main working medium radiation heating-surface (2), main working medium radiate by
Hot face (2) is arranged in the upper area and furnace roof of the peripheral region of burner (9), burner (9), reheating working medium radiation heating-surface
(1) lower zone of burner (9) and dry bottom hopper region are arranged in;Wherein, reheating working medium radiation heating-surface (1) is with thermal technology again
Matter radiation heating-surface entrance (1-1) and reheating working medium radiation heating-surface outlet (1-2), reheating working medium radiation heating-surface entrance (1-
1) furnace bottom is arranged in, reheating working medium radiation heating-surface outlet (1-2) is arranged under main working medium radiation heating-surface entrance (2-1)
Side;Main working medium radiation heating-surface (2) is with main working medium radiation heating-surface entrance (2-1) and main working medium radiation heating-surface outlet (2-
2), main working medium radiation heating-surface entrance (2-1) is arranged in the position of L/10~L/15 below burner (9), and wherein L is high for burner hearth
Degree, main working medium radiation heating-surface outlet (2-2) are arranged in furnace roof.
2. a kind of supercritical carbon dioxide Boiler radiation heated surface arrangement method according to claim 1, it is characterised in that:
The reheating working medium radiation heating-surface (1) and main working medium radiation heating-surface (2) use the structure of fin panel casing.
3. a kind of supercritical carbon dioxide Boiler radiation heated surface arrangement method according to claim 1, it is characterised in that:
It is connected between the reheating working medium radiation heating-surface (1) and main working medium radiation heating-surface (2) by expansion joint.
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CN106949451A (en) * | 2017-04-26 | 2017-07-14 | 华中科技大学 | A kind of double reheat ultra-supercritical boiler and its heated surface arrangement method |
CN107906498B (en) * | 2017-10-25 | 2018-12-14 | 东南大学 | Supercritical carbon dioxide circulating fluidized bed combustion coal boiler and its electricity generation system of driving |
CN108916847A (en) * | 2018-07-13 | 2018-11-30 | 西安热工研究院有限公司 | Using the heat convection supercritical carbon dioxide boiler of large scale flue gas recirculation |
CN111336493B (en) * | 2020-02-27 | 2021-01-19 | 西安交通大学 | Device and process method for producing low-temperature and low-pressure steam in power station boiler |
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EP2554803A1 (en) * | 2011-08-02 | 2013-02-06 | Siemens Aktiengesellschaft | Cyclical process assembly and cyclical process method |
CN104728823A (en) * | 2015-03-17 | 2015-06-24 | 西安热工研究院有限公司 | Novel supercritical carbon dioxide coal-fired boiler |
CN105526576A (en) * | 2016-01-20 | 2016-04-27 | 西安热工研究院有限公司 | Coal-based supercritical carbon dioxide Brayton cycle double-split-flow efficient power generation system |
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2554803A1 (en) * | 2011-08-02 | 2013-02-06 | Siemens Aktiengesellschaft | Cyclical process assembly and cyclical process method |
CN104728823A (en) * | 2015-03-17 | 2015-06-24 | 西安热工研究院有限公司 | Novel supercritical carbon dioxide coal-fired boiler |
CN105526576A (en) * | 2016-01-20 | 2016-04-27 | 西安热工研究院有限公司 | Coal-based supercritical carbon dioxide Brayton cycle double-split-flow efficient power generation system |
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