CN104481618A - High-parameter ultra-supercritical steam turbine generator unit - Google Patents
High-parameter ultra-supercritical steam turbine generator unit Download PDFInfo
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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, relate to a kind of high parameter ultra supercritical steam turbine generator set.
Background technique
Along with social development, the mankind are more and more stricter to the requirement of environmental protection, more and more stronger to the needs of clean and effective coal unit.For this reason, each large coal powerplant in the world especially turbine making producer accelerate the research and apply of efficient steam turbine technology.Improving one of the most effective means of turbine efficiency is exactly improve turbine steam condition, and therefore steam turbine has also developed into ultra supercritical (vapor (steam) temperature 600 DEG C) by subcritical (vapor (steam) temperature 538 DEG C), overcritical (vapor (steam) temperature 566 DEG C).
World Ge great power equipment manufacturing firm has carried out the research of high parameter supercritical turbine one after another in recent years, improves further on 600 DEG C of bases by steam parameter, has reached the target that coal unit efficiency breaks through 50%." AD700 " plan has been carried out in Europe for this reason, Japan has carried out A-USC research and development plan, China also establishes 700 DEG C of development alliances.Object is research and development steam parameter to be the efficient single reheat unit of 35MPa/700 DEG C/720 DEG C or parameter the be high efficient secondary reheating embrittlement of 35MPa/700 DEG C/720 DEG C/720 DEG C.
This type of unit is main is characterised in that steam-turbine temperature is more than 650 DEG C, and reach 700 DEG C of grades, even likely more than 750 DEG C of grades, steam turbine high-temperature parts can not adopt iron at this temperature, the substitute is Ni-based exotic material.Nickel-base material is extensive use in high temperature combustion engine, aeroengine, but it will be widely used in high-power Thermal generation unit and mainly there is following difficulty:
1) Ni-based foundry goods or forging maximize
High-power coal unit steam turbine casings or forging generally meet or exceed 20 tons, and physical dimension is also comparatively large, and this causes Ni-based foundry goods and forging blank to be difficult to realize in technique, and when high temperature is long, performance is difficult to meet design requirement.For this reason, Ge great turbine making producer launches research one after another, proposes various design proposal, and main design idea adopts welding dissimilar materials technology, Ni-based forge piece and iron-based forge piece is welded as a whole.
How the diverse bi-material of matrix welds, and how to ensure that welding performance becomes the world-famous puzzle being difficult to capture, welding dissimilar materials also will cause unit cost increase, because failure welding exists accident potential.
2) application of nickel-base material causes unit cost increase
Large-scale Ni-based forge piece cost intensive, general higher than 2,500,000 RMB/ton according to existing market assessment, how to reduce the large emphasis that unit cost becomes research.The most typical, direct effective mode reduces main steam and reheated steam high-temperature pipe consumption exactly for this reason.Patent CN202100032 U just proposes a kind of steam turbine method for arranging, to reduce high-temperature pipe consumption, reduces costs.But steam turbine entirety is placed in a high position by the program, because steam turbine overall weight is heavier, plant designing difficulty must be caused to become large, and civil engineering cost rises.
How to reduce high-parameter steam turbine technical difficulty and risk, reduction turbine making cost becomes the bottleneck that this type of unit is applied.
Summary of the invention
For the problems referred to above, the invention provides a kind of high parameter ultra supercritical steam turbine generator set, with a nickel-base material steam turbine generator and an iron steam turbine generator cogeneration, generate electricity for nickel-base material steam turbine generator from the steam of boiler higher than 620 DEG C, again the steam discharge (lower than 620 DEG C) of nickel-base material steam turbine generator is sent into the generating of iron steam turbine generator, thus efficiently solve the problems referred to above.
For single reheat unit, its concrete technological scheme is:
A kind of high parameter ultra supercritical steam turbine generator set, combined by two relatively independent steam turbine generator A and B and form, the steam turbine of described steam turbine generator A comprises high-pressure cylinder, intermediate pressure cylinder generator; The steam turbine of described steam turbine generator B comprises high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder generator; The working steam of described steam turbine generator A is from boiler, vapor (steam) temperature is higher than 620 DEG C, the working steam of described steam turbine generator B high-pressure cylinder is from the steam discharge of steam turbine generator A high-pressure cylinder, and the working steam of described steam turbine generator B intermediate pressure cylinder carrys out the steam discharge to steam turbine generator A intermediate pressure cylinder; The steam turbine of described steam turbine generator A is except the outer shell of cylinder, and all dynamic and static parts nickel-base materials are made; The steam turbine of described steam turbine generator B, all dynamic and static parts irons are made.
Further, described steam turbine generator A and B presses high-low position arranged superposed, on steam turbine generator A residence, closes on the steam (vapor) outlet of boiler, and to shorten the length of steam line, this steam line nickel-base material is made.
Further, the steam discharge of described steam turbine generator A high-pressure cylinder passes through the steam inlet 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 steam inlet of pipeline communication steam turbine generator B intermediate pressure cylinder, and pipeline is provided with exhaust steam valve; After load rejection, by exhaust steam valve, the steam in pipeline is discharged into reheater or vapour condenser; Described pipeline iron is made.
For double reheat power generation sets, its concrete technological scheme is:
A kind of high parameter ultra supercritical steam turbine generator set, combined by two relatively independent steam turbine generator A and B and form, the steam turbine of described steam turbine generator A comprises ultra-high pressure cylinder, high-pressure cylinder, intermediate pressure cylinder, generator; The steam turbine of described steam turbine generator B comprises ultra-high pressure cylinder, high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder, generator; The working steam of described steam turbine generator A is from boiler, vapor (steam) temperature is higher than 620 DEG C, the working steam of described steam turbine generator B ultrasonic high-pressure cylinder is 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 carrys out the steam discharge to steam turbine generator A high-pressure cylinder; The working steam of described steam turbine generator B intermediate pressure cylinder carrys out the steam discharge to steam turbine generator A intermediate pressure cylinder; The steam turbine of described steam turbine generator A is except the outer shell of cylinder, and all dynamic and static parts nickel-base materials are made; The steam turbine of described steam turbine generator B, all dynamic and static parts irons are made.
Further, described steam turbine generator A and B presses high-low position arranged superposed, on steam turbine generator A residence, closes on the steam (vapor) outlet of boiler, and to shorten the length of steam line, this steam line nickel-base material is made.
Further, the steam discharge of described steam turbine generator A ultra-high pressure cylinder passes through the steam inlet of pipeline communication steam turbine generator B ultrasonic high-pressure cylinder, and pipeline is provided with exhaust steam valve; The steam discharge of described steam turbine generator A high-pressure cylinder passes through the steam inlet 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 steam inlet of pipeline communication steam turbine generator B intermediate pressure cylinder, and pipeline is provided with exhaust steam valve; After load rejection, by exhaust steam valve, the steam in pipeline is discharged into reheater or vapour condenser; Described pipeline iron is made.
Beneficial effect of the present invention:
Owing to adopting Ni-based, iron-based steam turbine generator co-ordinative construction, the cylinder of two machines adopts pipeline communication, by the steam discharge of Ni-based steam turbine generator for the generating of iron-based steam turbine generator, like this, just the vapor (steam) temperature of two machines is not come for battery limit (BL) with 620 DEG C, meet respective material allowable temperature requirement.Iron-based steam turbine generator is existing ripe type, only need manufacture Ni-based steam turbine generator, there is not welding dissimilar materials problem, reduce manufacture difficulty, it also avoid the accident potential brought thus.
Accompanying drawing explanation
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.
Embodiment
embodiment onesingle reheat unit
See Fig. 1, this high parameter ultra supercritical steam turbine generator set, combined by two relatively independent steam turbine generator A and B and form, the steam turbine of described steam turbine generator A comprises high-pressure cylinder 1, intermediate pressure cylinder 2 as prime mover, drives generator 3 to generate electricity.The steam turbine of described steam turbine generator B comprises high-pressure cylinder 4, intermediate pressure cylinder 5, low pressure (LP) cylinder 6 as prime mover, drives generator 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 medium pressure steams from boiler reheater, vapor (steam) temperature 720 DEG C, pressure 7.65MPa.
The working steam of described steam turbine generator B high-pressure cylinder 4 is from the steam discharge of steam turbine generator A high-pressure cylinder 1, this exhaust temperature is lower than 620 DEG C, the working steam of described steam turbine generator B intermediate pressure cylinder 5 carrys out the steam discharge to steam turbine generator A intermediate pressure cylinder 2, and this exhaust temperature is lower than 620 DEG C.The steam discharge of intermediate pressure cylinder 5 enters vapour condenser after entering low pressure (LP) cylinder 6 continuation acting connecting tube.
The steam discharge of described steam turbine generator A high-pressure cylinder 1 is communicated with the steam inlet of steam turbine generator B high-pressure cylinder 4 by pipe 10, pipeline 10 is provided with exhaust steam valve 8; The steam discharge of described steam turbine generator A intermediate pressure cylinder 2 is communicated with the steam inlet of steam turbine generator B intermediate pressure cylinder 5 by pipeline 11, pipeline 11 is provided with exhaust steam valve 9; After load rejection, by exhaust steam valve 8,9, the steam in pipeline 10,11 is discharged into reheater or vapour condenser; Described pipeline 10,11 is made with iron.
The steam turbine of described steam turbine generator A is except the outer shell of cylinder, and all dynamic and static parts nickel-base materials are made; The steam turbine of described steam turbine generator B, all dynamic and static parts irons are made.
Described steam turbine generator A and B presses high-low position arranged superposed, on steam turbine generator A residence, closes on the steam (vapor) outlet of boiler, and to shorten the length of steam line, this steam line nickel-base material is made.
Steam turbine generator A drives generator 3 to generate electricity by its rotor.Steam turbine generator B drives generator 7 to generate electricity by its rotor.
The working procedure of this unit:
From the high temperature and high pressure steam (700 DEG C of boiler, after the high-pressure cylinder 1 35MPa) entering steam turbine generator A does work, temperature is down to less than 620 DEG C, the high-pressure cylinder 4 entering steam turbine generator B through pipeline 10 does work again, temperature, pressure reduces once again, then boiler reheater heating is entered, the medium pressure steam that output temperature is 720 DEG C, after the intermediate pressure cylinder 2 entering steam turbine generator A does work, temperature is down to less than 620 DEG C, the intermediate pressure cylinder 5 entering steam turbine generator B through pipeline 11 does work again, temperature, pressure reduces once again, after entering the low pressure (LP) cylinder 6 continuation acting of steam turbine generator B again, become exhaust steam to discharge, water is condensed into finally by vapour condenser, return boiler producing steam.
embodiment twodouble reheat power generation sets
See Fig. 2, this high parameter ultra supercritical steam turbine generator set, combined by two relatively independent steam turbine generator A and B and form, the steam turbine of described steam turbine generator A comprises ultra-high pressure cylinder 12, high-pressure cylinder 14, intermediate pressure cylinder 16 as prime mover, drives generator 18 to generate electricity.The steam turbine of described steam turbine generator B comprises ultra-high pressure cylinder 13, high-pressure cylinder 15, intermediate pressure cylinder 17, low pressure (LP) cylinder 19 as prime mover, drives generator 26 to generate electricity.
The working steam of described steam turbine generator A ultra-high pressure cylinder 12 is the high temperature and high pressure steams 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 steams 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 medium pressure steams from boiler secondary reheater, vapor (steam) temperature 720 DEG C, pressure 2.85MPa.
The working steam of described steam turbine generator B ultrasonic high-pressure cylinder 13 is from the steam discharge of steam turbine generator A ultra-high pressure cylinder 12, and this exhaust temperature is lower than 620 DEG C; The working steam of described steam turbine generator B high-pressure cylinder 15 carrys out the steam discharge to steam turbine generator A high-pressure cylinder 14; This exhaust temperature is lower than 620 DEG C; The working steam of described steam turbine generator B intermediate pressure cylinder 17 carrys out the steam discharge to steam turbine generator A intermediate pressure cylinder 16; This exhaust temperature is lower than 620 DEG C.The steam discharge of intermediate pressure cylinder 17 enters vapour condenser after entering low pressure (LP) cylinder 19 continuation acting connecting tube.
The steam discharge of described steam turbine generator A ultra-high pressure cylinder 12 is communicated with the steam inlet of steam turbine generator B ultrasonic high-pressure cylinder 13 by pipeline 20, pipeline 20 is provided with exhaust steam valve 21; The steam discharge of described steam turbine generator A high-pressure cylinder 14 is communicated with the steam inlet of steam turbine generator B high-pressure cylinder 15 by pipeline 22, pipeline 22 is provided with outlet valve 23; The steam discharge of described steam turbine generator A intermediate pressure cylinder 16 is communicated with the steam inlet of steam turbine generator B intermediate pressure cylinder 17 by pipeline 24, pipeline 24 is provided with exhaust steam valve 25; After load rejection, by exhaust steam valve 21,23,25, the steam in pipeline 20,22,24 is discharged into reheater or vapour condenser; Described pipeline 20,22,24 is made with iron.
The steam turbine of described steam turbine generator A is except the outer shell of cylinder, and all dynamic and static parts nickel-base materials are made; The steam turbine of described steam turbine generator B, all dynamic and static parts irons are made.
Described steam turbine generator A and B presses high-low position arranged superposed, on steam turbine generator A residence, closes on the steam (vapor) outlet of boiler, and to shorten the length of steam line, this steam line nickel-base material is made.
The working procedure of this unit:
From the high-pressure and high-temperature steam (35MPa of boiler, 700 DEG C) ultra-high pressure cylinder 12 that enters steam turbine generator A do work after temperature be down to less than 620 DEG C, the ultra-high pressure cylinder 13 entering steam turbine generator B through pipeline 20 does work again, temperature, pressure reduces once again, enter the heating of boiler single reheat device, the high-temperature steam that output temperature is 720 DEG C, enter the high-pressure cylinder 14 of steam turbine generator A, after acting, temperature is down to less than 620 DEG C, the high-pressure cylinder 15 entering steam turbine generator B through pipeline 22 does work again, temperature, pressure reduces once again, enter the heating of boiler secondary reheater, the high-temperature steam that output temperature is 720 DEG C, enter the intermediate pressure cylinder 16 of steam turbine generator A, after acting, temperature is down to less than 620 DEG C, after the intermediate pressure cylinder 17 entering steam turbine generator B through pipeline 24 does work again, steam does work through entering low pressure (LP) cylinder 19 connecting tube, after temperature, pressure reduces once again, become exhaust steam to discharge, water is condensed into finally by vapour condenser, return boiler producing steam.
Claims (6)
1. a high parameter ultra supercritical steam turbine generator set, combined by two relatively independent steam turbine generator A and B and form, the steam turbine of described steam turbine generator A comprises high-pressure cylinder, intermediate pressure cylinder, generator; The steam turbine of described steam turbine generator B comprises high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder, generator; It is characterized in that:
The working steam of described steam turbine generator A is from boiler, vapor (steam) temperature is higher than 620 DEG C, the working steam of described steam turbine generator B high-pressure cylinder is from the steam discharge of steam turbine generator A high-pressure cylinder, and the working steam of described steam turbine generator B intermediate pressure cylinder carrys out the steam discharge to steam turbine generator A intermediate pressure cylinder;
The steam turbine of described steam turbine generator A is except the outer shell of cylinder, and all dynamic and static parts nickel-base materials are made; The steam turbine of described steam turbine generator B, all dynamic and static parts irons are made.
2. high parameter ultra supercritical steam turbine generator set as claimed in claim 1, it is characterized in that, described steam turbine generator A and B presses high-low position arranged superposed, on steam turbine generator A residence, close on the steam (vapor) outlet of boiler, to shorten the length of steam line, this steam line nickel-base material is made.
3. high parameter ultra supercritical steam turbine generator set as claimed in claim 1, is characterized in that, the steam discharge of described steam turbine generator A high-pressure cylinder passes through the steam inlet 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 is by pipe to the steam inlet being communicated with steam turbine generator B intermediate pressure cylinder, and pipeline is provided with exhaust steam valve; After load rejection, by exhaust steam valve, the steam in pipeline is discharged into reheater or vapour condenser; Described pipeline iron is made.
4. a high parameter ultra supercritical steam turbine generator set, combined by two relatively independent steam turbine generator A and B and form, the steam turbine of described steam turbine generator A comprises ultra-high pressure cylinder, high-pressure cylinder, intermediate pressure cylinder, generator; The steam turbine of described steam turbine generator B comprises ultra-high pressure cylinder, high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder, generator; It is characterized in that:
The working steam of described steam turbine generator A is from boiler, vapor (steam) temperature is higher than 620 DEG C, the working steam of described steam turbine generator B ultrasonic high-pressure cylinder is 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 carrys out the steam discharge to steam turbine generator A high-pressure cylinder; The working steam of described steam turbine generator B intermediate pressure cylinder carrys out the steam discharge to steam turbine generator A intermediate pressure cylinder;
The steam turbine of described steam turbine generator A is except the outer shell of cylinder, and all dynamic and static parts nickel-base materials are made; The steam turbine of described steam turbine generator B, all dynamic and static parts irons are made.
5. high parameter ultra supercritical steam turbine generator set as claimed in claim 4, it is characterized in that, described steam turbine generator A and B presses high-low position arranged superposed, on steam turbine generator A residence, close on the steam (vapor) outlet of boiler, to shorten the length of steam line, this steam line nickel-base material is made.
6. high parameter ultra supercritical steam turbine generator set as claimed in claim 4, is characterized in that, the steam discharge of described steam turbine generator A ultra-high pressure cylinder passes through the steam inlet of pipeline communication steam turbine generator B ultrasonic high-pressure cylinder, and pipeline is provided with exhaust steam valve; The steam discharge of described steam turbine generator A high-pressure cylinder passes through the steam inlet 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 steam inlet of pipeline communication steam turbine generator B intermediate pressure cylinder, and pipeline is provided with exhaust steam valve; After load rejection, by exhaust steam valve, the steam in pipeline is discharged into reheater or vapour condenser; Described pipeline iron is made.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN111623988A (en) * | 2020-05-28 | 2020-09-04 | 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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| 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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2014
- 2014-11-14 CN CN201410644874.0A patent/CN104481618B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10339109A (en) * | 1997-06-04 | 1998-12-22 | Mitsubishi Heavy Ind Ltd | Multi-shaft combined cycle power generation plant |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN111623988A (en) * | 2020-05-28 | 2020-09-04 | 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 |
| 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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