CN104481618B - High-parameter ultra-supercritical steam turbine generator unit - Google Patents
High-parameter ultra-supercritical steam turbine generator unit Download PDFInfo
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- CN104481618B CN104481618B CN201410644874.0A CN201410644874A CN104481618B CN 104481618 B CN104481618 B CN 104481618B CN 201410644874 A CN201410644874 A CN 201410644874A CN 104481618 B CN104481618 B CN 104481618B
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- 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
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Abstract
The invention discloses a high-parameter ultra-supercritical steam turbine generator unit. The high-parameter ultra-supercritical steam turbine generator unit is characterized in that a nickel-based material steam turbine generator and an iron-based material steam turbine generator are combined to generate power; steam under temperature exceeding 620 DEG C from a boiler is supplied to the nickel-based material steam turbine generator for generating power, and then exhausted steam (under temperature less than 620 DEG C) of each cylinder of the nickel-based material steam turbine generator is fed into the corresponding cylinder of the iron-based material steam turbine generator, so as to drive the iron-based material steam turbine generator to generate power.
Description
Technical field
The invention belongs to field of thermal power, it is related to a kind of high parameter ultra supercritical steam turbine generating set.
Background technology
With social development, the requirement to environmental conservation for the mankind is more and more stricter, the needs to clean and effective coal unit
More and more stronger.For this reason, each big coal powerplant in the world especially turbine making producer accelerates efficient steam turbine technology
Research and application.Improving one of maximally effective means of turbine efficiency is exactly to improve turbine steam condition, therefore steam turbine
Ultra supercritical (600 DEG C of vapor (steam) temperature) has been developed into by subcritical (538 DEG C of vapor (steam) temperature), supercritical (566 DEG C of vapor (steam) temperature).
World Ge great power equipment manufacturing firm has carried out the research of high parameter supercritical turbine one after another in recent years, that is,
Steam parameter is improved on the basis of 600 DEG C further, has reached the target that coal unit efficiency breaks through 50%.Open for this Europe
Open up " ad700 " plan, Japan has carried out a-usc research and development plan, China also establishes 700 DEG C of development alliances.Purpose is research and development
Steam parameter is 35mpa/700 DEG C/720 DEG C of efficient single reheat unit or parameter is 35mpa/700 DEG C/720 DEG C/720 DEG C
High efficient secondary reheating embrittlement.
Such unit is main to be characterised by that steam-turbine temperature, more than 650 DEG C, reaches 700 DEG C of grades, or even have can
Can exceed that 750 DEG C of grades, steam turbine high-temperature part can not adopt iron at this temperature, the substitute is Ni-based resistance to
High-temperature material.Nickel-base material is extensively applied in high temperature combustion engine, aero-engine, but it will be widely used in high-power combustion
Coal power generation unit is primarily present following difficulty:
1) Ni-based foundry goods or forging maximize
High-power coal unit steam turbine casings or forging commonly reaches or more than 20 tons, physical dimension is also larger, and this leads
Cause Ni-based foundry goods and forging blank to be difficult in technique, and when high temperature is long, performance is difficult to meet design requirement.For this reason, it is each big
Turbine making producer launches research one after another it is proposed that various design, and main design idea is to adopt welding dissimilar materials
Technology, Ni-based forge piece is welded as a whole with iron-based forge piece.
How the diverse bi-material of matrix welds, and how to ensure that welding performance becomes the world being difficult to capture difficult
Topic, welding dissimilar materials also lead to unit cost increase, because failure welding has accident potential.
2) application of nickel-base material leads to unit cost increase
Large-scale Ni-based forge piece cost intensive, is generally greater than 2,500,000 RMB/ton according to existing market assessment, how to drop
Low unit cost becomes a big emphasis of research.It is exactly to reduce main steam and reheating steaming for this most typically, direct effective manner
Vapour high-temperature pipe consumption.Patent cn202100032 u just proposes a kind of steam turbine method for arranging, reduce high-temperature pipe to use
Amount, reduces cost.But steam turbine is integrally placed at a high position by the program, because steam turbine overall weight is heavier, necessarily lead to factory
Room design difficulty becomes big, and civil engineering cost rises.
How to reduce high-parameter steam turbine technical difficulty and risk, reducing turbine making cost becomes such unit popularization
The bottleneck of application.
Content of the invention
For the problems referred to above, the present invention provides a kind of high parameter ultra supercritical steam turbine generating set, with a nickel-base material
Steam turbine generator and an iron steam turbine generator cogeneration, the steam being higher than 620 DEG C from boiler supplies nickel-base material
Steam turbine generator generates electricity, then the steam discharge (less than 620 DEG C) of nickel-base material steam turbine generator is sent into iron steam turbine generator
Generate electricity, thus efficiently solving the problems referred to above.
For single reheat unit, its concrete technical scheme is:
A kind of high parameter ultra supercritical steam turbine generating set, combines structure by two relatively independent steam turbine generator a and b
Become, the steam turbine of described steam turbine generator a includes high pressure cylinder, intermediate pressure cylinder electromotor；The steam turbine of described steam turbine generator b includes
High pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder electromotor；The working steam of described steam turbine generator a is derived from boiler, and vapor (steam) temperature is higher than 620
DEG C, the working steam of described steam turbine generator b high pressure cylinder is derived from the steam discharge of steam turbine generator a high pressure cylinder, described steam turbine generator b
The working steam of intermediate pressure cylinder is derived from the steam discharge of steam turbine generator a intermediate pressure cylinder；The steam turbine of described steam turbine generator a is in addition to cylinder
Beyond cylinder, all dynamic and static parts are made with nickel-base material；The steam turbine of described steam turbine generator b, all dynamic and static part ferrum
Sill is made.
Further, described steam turbine generator a and b presses high-low position arranged superposed, on steam turbine generator a residence, closes on boiler
Steam (vapor) outlet, to shorten the length of steam line, this steam line is made with nickel-base material.
Further, the steam discharge of described steam turbine generator a high pressure cylinder passes through entering of pipeline communication steam turbine generator b high pressure cylinder
Steam ports, pipeline is provided with exhaust steam valve；The steam discharge of described steam turbine generator a intermediate pressure cylinder passes through to press in pipeline communication steam turbine generator b
The air intake of cylinder, pipeline is provided with exhaust steam valve；After load rejection, the steam in pipeline is discharged into by reheater by exhaust steam valve
Or condenser；Described pipeline is made with iron.
For double reheat power generation sets, its concrete technical scheme is:
A kind of high parameter ultra supercritical steam turbine generating set, combines structure by two relatively independent steam turbine generator a and b
Become, the steam turbine of described steam turbine generator a includes ultra-high pressure cylinder, high pressure cylinder, intermediate pressure cylinder, electromotor；Described steam turbine generator b's
Steam turbine includes ultra-high pressure cylinder, high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder, electromotor；The working steam of described steam turbine generator a is derived from
Boiler, vapor (steam) temperature is higher than 620 DEG C, and the working steam of described steam turbine generator b ultra-high pressure cylinder is derived from steam turbine generator a supertension
The steam discharge of cylinder, the working steam of described steam turbine generator b high pressure cylinder is derived from the steam discharge of steam turbine generator a high pressure cylinder；Described steamer
The working steam of electromotor b intermediate pressure cylinder is derived from the steam discharge of steam turbine generator a intermediate pressure cylinder；The steam turbine of described steam turbine generator a is removed
Beyond the outer shell of cylinder, all dynamic and static parts are made with nickel-base material；The steam turbine of described steam turbine generator b is all dynamic and static
Part is made with iron.
Further, described steam turbine generator a and b presses high-low position arranged superposed, on steam turbine generator a residence, closes on boiler
Steam (vapor) outlet, to shorten the length of steam line, this steam line is made with nickel-base material.
Further, the steam discharge of described steam turbine generator a ultra-high pressure cylinder passes through pipeline communication steam turbine generator b ultra-high pressure cylinder
Air intake, pipeline is provided with exhaust steam valve；The steam discharge of described steam turbine generator a high pressure cylinder passes through pipeline communication steam turbine generator b
The air intake of high pressure cylinder, pipeline is provided with exhaust steam valve；The steam discharge of described steam turbine generator a intermediate pressure cylinder is sent out by pipeline communication steamer
The air intake of motor b intermediate pressure cylinder, pipeline is provided with exhaust steam valve；After load rejection, by exhaust steam valve by the steam in pipeline
It is discharged into reheater or condenser；Described pipeline is made with iron.
Beneficial effects of the present invention:
Because using Ni-based, iron-based steam turbine generator co-ordinative construction, the cylinder of two machines adopts pipeline communication, by Ni-based steamer
The steam discharge of electromotor supplies iron-based steam turbine generator to generate electricity, and so, just the vapor (steam) temperature of two machines is distinguished with 620 DEG C for boundary,
Meet respective material allowable temperature to require.Iron-based steam turbine generator is existing maturation type, only need to manufacture Ni-based turbine generator
, there is not welding dissimilar materials problem, reduce manufacture difficulty in machine, it also avoid the accident potential thus bringing.
Brief description
Fig. 1 is the structural representation of single reheat unit of the present invention
Fig. 2 is the structural representation of double reheat power generation sets of the present invention
Specific embodiment
One reheating embrittlement of embodiment
Referring to Fig. 1, this high parameter ultra supercritical steam turbine generating set, by two relatively independent steam turbine generator a and b group
Close and constitute, the steam turbine of described steam turbine generator a includes high pressure cylinder 1, intermediate pressure cylinder 2 as prime mover, drives electromotor 3 to generate electricity.
The steam turbine of described steam turbine generator b includes high pressure cylinder 4, intermediate pressure cylinder 5, low pressure (LP) cylinder 6 as prime mover, drives electromotor 7 to generate electricity.
The working steam of described steam turbine generator a high pressure cylinder 1 is the high temperature and high pressure steam from boiler, vapor (steam) temperature 700
DEG C, pressure 35mpa；The working steam of intermediate pressure cylinder 2 is the high temperature middle pressure steam from boiler reheater, 720 DEG C of vapor (steam) temperature, pressure
Power 7.65mpa.
The working steam of described steam turbine generator b high pressure cylinder 4 is derived from the steam discharge of steam turbine generator a high pressure cylinder 1, this steam discharge temperature
Degree is less than 620 DEG C, and the working steam of described steam turbine generator b intermediate pressure cylinder 5 is derived from the steam discharge of steam turbine generator a intermediate pressure cylinder 2, this row
Stripping temperature is less than 620 DEG C.The steam discharge of intermediate pressure cylinder 5 enters condenser after entering low pressure (LP) cylinder 6 communicating pipe to continue acting.
The steam discharge of described steam turbine generator a high pressure cylinder 1 connects the air intake of steam turbine generator b high pressure cylinder 4, pipe by pipe 10
Road 10 is provided with exhaust steam valve 8；The steam discharge of described steam turbine generator a intermediate pressure cylinder 2 connects steam turbine generator b intermediate pressure cylinder by pipeline 11
5 air intake, pipeline 11 is provided with exhaust steam valve 9；After load rejection, by exhaust steam valve 8,9 by the steam in pipeline 10,11
It is discharged into reheater or condenser；Described pipeline 10,11 is made with iron.
The steam turbine of described steam turbine generator a in addition to the outer shell of cylinder, made with nickel-base material by all dynamic and static parts；
The steam turbine of described steam turbine generator b, all dynamic and static parts are made with iron.
Described steam turbine generator a and b presses high-low position arranged superposed, and on steam turbine generator a residence, the steam closing on boiler goes out
Mouthful, to shorten the length of steam line, this steam line is made with nickel-base material.
Steam turbine generator a drives electromotor 3 to generate electricity by its rotor.Steam turbine generator b drives electromotor 7 by its rotor
Generate electricity.
The work process of the unit:
Enter temperature after high pressure cylinder 1 acting of steam turbine generator a from the high temperature and high pressure steam (700 DEG C, 35mpa) of boiler
It is down to less than 620 DEG C, do work again through the high pressure cylinder 4 that pipeline 10 enters steam turbine generator b, temperature, pressure reduces once again, then
Enter boiler reheater heating, the middle pressure steam that 720 DEG C of output temperature, enter temperature after intermediate pressure cylinder 2 acting of steam turbine generator a
It is down to less than 620 DEG C, do work again through the intermediate pressure cylinder 5 that pipeline 11 enters steam turbine generator b, temperature, pressure reduces once again, then enters
Enter steam turbine generator b low pressure (LP) cylinder 6 continue acting after, become exhaust steam and discharge, after be condensed into water through condenser, return boiler and produce
Steam.
Embodiment two double reheat power generation sets
Referring to Fig. 2, this high parameter ultra supercritical steam turbine generating set, by two relatively independent steam turbine generator a and b group
Close and constitute, the steam turbine of described steam turbine generator a includes ultra-high pressure cylinder 12, high pressure cylinder 14, intermediate pressure cylinder 16 as prime mover, drives
Electromotor 18 generates electricity.The steam turbine of described steam turbine generator b includes ultra-high pressure cylinder 13, high pressure cylinder 15, intermediate pressure cylinder 17, low pressure (LP) cylinder 19
As prime mover, electromotor 26 is driven to generate electricity.
The working steam of described steam turbine generator a ultra-high pressure cylinder 12 is the high temperature and high pressure steam from boiler, vapor (steam) temperature
700 DEG C, pressure 35mpa；The working steam of high pressure cylinder 14 is the high temperature and high pressure steam from boiler single reheat device, vapor (steam) temperature
720 DEG C, pressure 9.34mpa.The working steam of intermediate pressure cylinder 16 is the high temperature middle pressure steam from boiler secondary reheater, steam temperature
720 DEG C of degree, pressure 2.85mpa.
The working steam of described steam turbine generator b ultra-high pressure cylinder 13 is derived from the steam discharge of steam turbine generator a ultra-high pressure cylinder 12, should
Exhaust temperature is less than 620 DEG C；The working steam of described steam turbine generator b high pressure cylinder 15 is derived from steam turbine generator a high pressure cylinder 14
Steam discharge；This exhaust temperature is less than 620 DEG C；The working steam of described steam turbine generator b intermediate pressure cylinder 17 is derived from steam turbine generator a and presses
The steam discharge of cylinder 16；This exhaust temperature is less than 620 DEG C.The steam discharge of intermediate pressure cylinder 17 is after entering low pressure (LP) cylinder 19 continuation acting communicating pipe
Enter condenser.
The steam discharge of described steam turbine generator a ultra-high pressure cylinder 12 connects steam turbine generator b ultra-high pressure cylinder 13 by pipeline 20
Air intake, pipeline 20 is provided with exhaust steam valve 21；The steam discharge of described steam turbine generator a high pressure cylinder 14 connects steamer by pipeline 22 and sends out
The air intake of motor b high pressure cylinder 15, pipeline 22 is provided with air bleeding valve 23；The steam discharge of described steam turbine generator a intermediate pressure cylinder 16 passes through
Pipeline 24 connects the air intake of steam turbine generator b intermediate pressure cylinder 17, and pipeline 24 is provided with exhaust steam valve 25；After load rejection, lead to
Cross exhaust steam valve 21,23,25 and the steam in pipeline 20,22,24 is discharged into reheater or condenser；Ferrum used by described pipeline 20,22,24
Sill is made.
The steam turbine of described steam turbine generator a in addition to the outer shell of cylinder, made with nickel-base material by all dynamic and static parts；
The steam turbine of described steam turbine generator b, all dynamic and static parts are made with iron.
Described steam turbine generator a and b presses high-low position arranged superposed, and on steam turbine generator a residence, the steam closing on boiler goes out
Mouthful, to shorten the length of steam line, this steam line is made with nickel-base material.
The work process of the unit:
Enter after ultra-high pressure cylinder 12 acting of steam turbine generator a from the high-pressure and high-temperature steam (35mpa, 700 DEG C) of boiler
Temperature is down to less than 620 DEG C, does work again through the ultra-high pressure cylinder 13 that pipeline 20 enters steam turbine generator b, temperature, pressure drops once again
Low, enter the heating of boiler single reheat device, the high-temperature steam that 720 DEG C of output temperature, enter the high pressure cylinder 14 of steam turbine generator a,
After acting, temperature is down to less than 620 DEG C, does work again through the high pressure cylinder 15 that pipeline 22 enters steam turbine generator b, temperature, pressure is again
Degree reduces, and enters the heating of boiler secondary reheater, the high-temperature steam that 720 DEG C of output temperature, enters the intermediate pressure cylinder of steam turbine generator a
16, after acting, temperature is down to less than 620 DEG C, after doing work again through the intermediate pressure cylinder 17 that pipeline 24 enters steam turbine generator b, steam warp
Enter low pressure (LP) cylinder 19 communicating pipe to do work, after temperature, pressure reduces once again, become exhaust steam discharge, after be condensed into water through condenser,
Return boiler producing steam.
Claims (6)
1. a kind of high parameter ultra supercritical steam turbine generating set, is combined by two relatively independent steam turbine generator a and b and constitutes,
The steam turbine of described steam turbine generator a includes high pressure cylinder, intermediate pressure cylinder, electromotor；The steam turbine of described steam turbine generator b includes height
Cylinder pressure, intermediate pressure cylinder, low pressure (LP) cylinder, electromotor；It is characterized in that:
The working steam of described steam turbine generator a is derived from boiler, and vapor (steam) temperature is higher than 620 DEG C, described steam turbine generator b high pressure cylinder
Working steam be derived from the steam discharge of steam turbine generator a high pressure cylinder, the working steam of described steam turbine generator b intermediate pressure cylinder is derived from steamer
The steam discharge of electromotor a intermediate pressure cylinder；
The steam turbine of described steam turbine generator a in addition to the outer shell of cylinder, made with nickel-base material by all dynamic and static parts；Described
The steam turbine of steam turbine generator b, all dynamic and static parts are made with iron.
2. high parameter ultra supercritical steam turbine generating set as claimed in claim 1 is it is characterised in that described steam turbine generator a
Press high-low position arranged superposed with b, on steam turbine generator a residence, close on the steam (vapor) outlet of boiler, to shorten the length of steam line,
This steam line is made with nickel-base material.
3. high parameter ultra supercritical steam turbine generating set as claimed in claim 1 is it is characterised in that described steam turbine generator a
The steam discharge of high pressure cylinder passes through the air intake of pipeline communication steam turbine generator b high pressure cylinder, and pipeline is provided with exhaust steam valve；Described steamer is sent out
The steam discharge of motor a intermediate pressure cylinder passes through the air intake of pipeline communication steam turbine generator b intermediate pressure cylinder, and pipeline is provided with exhaust steam valve；In machine
After group removal of load, the steam in pipeline is discharged into by reheater or condenser by exhaust steam valve；Described pipeline is made with iron.
4. a kind of high parameter ultra supercritical steam turbine generating set, is combined by two relatively independent steam turbine generator a and b and constitutes,
The steam turbine of described steam turbine generator a includes ultra-high pressure cylinder, high pressure cylinder, intermediate pressure cylinder, electromotor；The vapour of described steam turbine generator b
Turbine includes ultra-high pressure cylinder, high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder, electromotor；It is characterized in that:
The working steam of described steam turbine generator a is derived from boiler, and vapor (steam) temperature is higher than 620 DEG C, described steam turbine generator b supertension
The working steam of cylinder is derived from the steam discharge of steam turbine generator a ultra-high pressure cylinder, and the working steam of described steam turbine generator b high pressure cylinder is derived from
The steam discharge of steam turbine generator a high pressure cylinder；The working steam of described steam turbine generator b intermediate pressure cylinder is derived from steam turbine generator a intermediate pressure cylinder
Steam discharge；
The steam turbine of described steam turbine generator a in addition to the outer shell of cylinder, made with nickel-base material by all dynamic and static parts；Described
The steam turbine of steam turbine generator b, all dynamic and static parts are made with iron.
5. high parameter ultra supercritical steam turbine generating set as claimed in claim 4 is it is characterised in that described steam turbine generator a
Press high-low position arranged superposed with b, on steam turbine generator a residence, close on the steam (vapor) outlet of boiler, to shorten the length of steam line,
This steam line is made with nickel-base material.
6. high parameter ultra supercritical steam turbine generating set as claimed in claim 4 is it is characterised in that described steam turbine generator a
The steam discharge of ultra-high pressure cylinder passes through the air intake of pipeline communication steam turbine generator b ultra-high pressure cylinder, and pipeline is provided with exhaust steam valve；Described vapour
The steam discharge of turbine generator a high pressure cylinder passes through the air intake of pipeline communication steam turbine generator b high pressure cylinder, and pipeline is provided with exhaust steam valve；
The steam discharge of described steam turbine generator a intermediate pressure cylinder passes through the air intake of pipeline communication steam turbine generator b intermediate pressure cylinder, and pipeline is provided with row
Steam valve；After load rejection, the steam in pipeline is discharged into by reheater or condenser by exhaust steam valve；Described pipeline iron-based
Material is made.
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| CN201410644874.0A CN104481618B (en) | 2014-11-14 | 2014-11-14 | High-parameter ultra-supercritical steam turbine generator unit |
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| CN201410644874.0A CN104481618B (en) | 2014-11-14 | 2014-11-14 | High-parameter ultra-supercritical steam turbine generator unit |
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| CN109441742A (en) * | 2018-09-21 | 2019-03-08 | 东方电气集团东方汽轮机有限公司 | A kind of electricity generation system using solar energy heating boiler feedwater |
| CN111623988B (en) * | 2020-05-28 | 2022-11-18 | 国网河北省电力有限公司电力科学研究院 | Safety evaluation method for load shedding test of high-position-arrangement steam turbine set |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063414A (en) * | 2006-04-26 | 2007-10-31 | 株式会社东芝 | Steam turbine and rotor |
| CN201972746U (en) * | 2011-03-18 | 2011-09-14 | 中国电力工程顾问集团华东电力设计院 | Double reheating thermal system |
| CN103925013A (en) * | 2014-04-18 | 2014-07-16 | 国电科学技术研究院 | Ultra-supercritical secondary reheating two-shaft steam turbine bypass system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3586542B2 (en) * | 1997-06-04 | 2004-11-10 | 三菱重工業株式会社 | Multi-shaft combined cycle power plant |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063414A (en) * | 2006-04-26 | 2007-10-31 | 株式会社东芝 | Steam turbine and rotor |
| CN201972746U (en) * | 2011-03-18 | 2011-09-14 | 中国电力工程顾问集团华东电力设计院 | Double reheating thermal system |
| CN103925013A (en) * | 2014-04-18 | 2014-07-16 | 国电科学技术研究院 | Ultra-supercritical secondary reheating two-shaft steam turbine bypass system |
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