CN102720546A - Ultra-supercritical 1300MW grade steam turbine - Google Patents
Ultra-supercritical 1300MW grade steam turbine Download PDFInfo
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- CN102720546A CN102720546A CN2012102253617A CN201210225361A CN102720546A CN 102720546 A CN102720546 A CN 102720546A CN 2012102253617 A CN2012102253617 A CN 2012102253617A CN 201210225361 A CN201210225361 A CN 201210225361A CN 102720546 A CN102720546 A CN 102720546A
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Abstract
The invention provides an ultra-supercritical 1300MW grade steam turbine. The steam turbine comprises a high-pressure cylinder, an intermediate-pressure cylinder and two or three low-pressure cylinders, wherein a high pressure rotor is arranged inside the high-pressure cylinder, the steam inlet temperature of the high-pressure cylinder is in a range from 600 DEG C to 625 DEG C, the steam inlet pressure of the high-pressure cylinder is in a range of 28-30MPa, an intermediate pressure rotor is arranged inside the intermediate-pressure cylinder, the reheating steam inlet temperature of the intermediate-pressure cylinder is in a range from 610 DEG C to 635 DEG C, low pressure rotors are arranged inside low-pressure cylinders, the steam exhaust pressure of low-pressure cylinders is in a range of 3.6-11.8kPa, the high-pressure cylinder, the intermediate-pressure cylinder and low-pressure cylinders are sequentially arranged and connected, and the high pressure rotor, the intermediate pressure rotor and low pressure rotors are coaxially connected through couplers. Compared with a current ultra-supercritical steam turbine technology, the steam turbine has the advantages that the cost per kilo watt, the heat consumption of electric power generation and the coal consumption of the steam turbine can be reduced synchronously, and the steam turbine has a high cost-performance ratio and good market prospects.
Description
Technical field
The present invention relates to a kind of steam turbine, particularly relate to level steam turbines such as a kind of high efficiency ultra supercritical 1300MW.
Background technique
Electric power has become the pillar of World Economics and human survival.Resource situation according to the earth; Right-about can not take place in the leading position of power industry in coal fired power generation in for a long time, advance the development of clean combustion of coal generation technology, improves efficiency of plant; Economize on resources, reducing discharging is the basic development direction of coal fired power generation technology and product.The primary energy no matter generator set uses is fire coal, nuclear energy or combustion vapour; As long as use the working medium of steam as transformation of energy; Steam turbine is all born the function that steam thermal energy is converted into mechanical work, thereby steam turbine is one of most important power generating equipment of decision entire power plant performance.
Because environmental protection and energy-conservation cry are increasingly high; Coal price and carbon emission expense have become two key factors of decision steam turbine cost performance; These two factors have increased substantially the value of high parameter large capacity turbine, and large steam turbine has become a main direction of steam turbine development.And because the influence of factors such as structure, material; The development of large steam turbine tends to receive certain restriction; Peak output steamer seat in the plane is the 1100MW steam turbine in the world at present; The factor that influences the steam turbine power size is a lot, mainly is steam enthalpy drop and turbine efficiency decision by the turnover steam turbine.
As above overseas high bridge the 3rd generating responsibility 2 * 1000MW of Co., Ltd unit is to adopt high parameter and use the typical case that the optimization of Thermal System technology obtains remarkable energy-saving and emission-reduction benefit, and operational efficiency has reached world today's highest level.The coordinating with steam rapid heat cycle high parameter; This power plant releases a series of new energy-conserving and emission-cutting technologies: through improve boiler combustion efficiency, reduce boiler carbonated drink crushing and cigarette vapour locking power, reduce station service power consumption rate, utilize cigarette vapour waste heat, cold junction optimization reduces back pressure, match high efficiency feed pump turbine, optimisation techniques such as bypass flushing before starting; Make the net coal consumption rate accumulative total of steam turbine reduce by 4%; The gross coal consumption rate of this power plant supercritical turbine conversion in 2010 can reach 268g/kWh, is the highest level in the world then.
Can know that by foregoing description improving steam turbine operation efficient is an effective way that increases steam turbine power, is to adopt new material to improve the steam throttle (steam) temperature and improve turbine efficiency method commonly used.Like European Union and the new material nickel-bass alloy material of Japanology; Though adopt this nickel-bass alloy material can further bear higher temperature; But the cost of nickel-bass alloy material is very high; And a series of key manufacturing technology technology (like heavy casting and forging, welded disc turbine rotor) of steam turbine critical piece still can not be used in product still in conceptual phase in the recent period.It is thus clear that ferrite material is still the main material that the current generation steam turbine is used; Ferrite material commonly used at present is two temperature grades more than 600 ℃ and 625 ℃; But the highest design temperature of existing ultra supercritical single reheat unit still is 27MPa/600 ℃/600 ℃, and the potentiality of ferrite material do not embody in the existing product technology as yet fully.Therefore the power capacity that how further to promote the steam turbine that adopts the ferrite material manufacturing is only the technical problem that needs most solution at present.
Summary of the invention
The shortcoming of existing technology the object of the present invention is to provide a kind of steam turbine that adopts existing ferrite material, power can reach 1300MW in view of the above.
For realizing above-mentioned purpose and other relevant purposes, the present invention provides level steam turbines such as a kind of ultra supercritical 1300MW, and it comprises:
One high-pressure cylinder is provided with high pressure rotor in the said high-pressure cylinder, and said high-pressure cylinder throttle (steam) temperature is 600 ℃-625 ℃, and said high-pressure cylinder initial steam pressure is 28-30MPa; One intermediate pressure cylinder is pressed rotor in being provided with in the said intermediate pressure cylinder, the hot again throttle (steam) temperature of said intermediate pressure cylinder is 610-635 ℃; Two or three low pressure (LP) cylinders are provided with low pressure rotor in the said low pressure (LP) cylinder, and the exhaust steam pressure of said low pressure (LP) cylinder is 3.6-11.8kPa; Said high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder are arranged in order connection, and said high pressure rotor, middle pressure rotor, low pressure rotor are through the coaxial successively connection of coupling.
Preferably, said high-pressure cylinder is the single current cylinder, and said intermediate pressure cylinder, low pressure (LP) cylinder are double-current cylinder.
Preferably, said high-pressure cylinder is a double shell cylinder, and the outer shell of said high-pressure cylinder is formed by connecting through axial bolts former and later two cylinder type cylinder bodies.
Preferably, said high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder are that single shaft holds support.
Preferably, said high pressure rotor, middle pressure rotor are divided into admission section and steam discharge section two-part, and said admission section adopts 9%Cr or 10%Cr material, and said steam discharge section adopts the CrMoV material, said admission section and the welding of said steam discharge section.
Preferably, the high-temperature component on said high-pressure cylinder, the intermediate pressure cylinder is 600-625 ℃ of ferrite material.
Preferably, the bearing support of said high pressure rotor, middle pressure rotor, low pressure rotor lands support.
Preferably, the blade on said high pressure rotor, middle pressure rotor, the low pressure rotor is the full twisted blade of 3D.
As stated, level steam turbines such as ultra supercritical 1300MW of the present invention have following beneficial effect: the name-plate rating of level steam turbines such as this ultra supercritical 1300MW can reach the 1300MW grade, and EIAJ is 1400MW, surpasses maximum at present 1100MW capacity;
Its hear rate has reduced about 50～100kJ/kWh than present 1000MW unit, so this steam turbine has the advantage that output power is big, hear rate is low, meets present energy conservation and environment protection.There is this steam turbine can adopt 600-625 ℃ of ferrite material of present maturation to process again, need not to use expensive alloy material, so it also has low cost of manufacture, the advantage that cost performance is high.
Description of drawings
Fig. 1 is the side view of the embodiment of the invention five cylinders six steam discharge units.
Fig. 2 is the plan view of the embodiment of the invention five cylinders six steam discharge units.
Fig. 3 is the side view of the embodiment of the invention four cylinders four steam discharge units.
Fig. 4 is the plan view of the embodiment of the invention four cylinders four steam discharge units.
The element numbers explanation
1 high-pressure cylinder
2 intermediate pressure cylinders
3 low pressure (LP) cylinders
4 connecting tube
Embodiment
Below by particular specific embodiment mode of execution of the present invention is described, be familiar with this technological personage and can understand other advantages of the present invention and effect easily by the content that this specification disclosed.
The appended graphic structure that illustrates of this specification, ratio, size etc.; All only in order to cooperate the content that specification disclosed; Understand and reading for being familiar with this technological personage; Be not in order to limiting the enforceable qualifications of the present invention, thus the technical essential meaning of tool not, the modification of any structure, the change of proportionate relationship or big or small adjustment; Not influencing under effect that the present invention can produce and the purpose that can reach, all should still drop on disclosed technology contents and get in the scope that can contain.Simultaneously; Quoted in this specification as " on ", D score, " left side ", " right side ", " centre " reach the term of " " etc.; Also be merely be convenient to narrate clear, but not in order to limit the enforceable scope of the present invention, the change of its relativeness or adjustment; Under no essence change technology contents, when also being regarded as the enforceable category of the present invention.
Like Fig. 1, shown in 2; The present invention provides level steam turbines such as a kind of ultra supercritical 1300MW; It comprises a high-pressure cylinder 1, an intermediate pressure cylinder 2 and 3 low pressure (LP) cylinders 3, and wherein high-pressure cylinder 1 is that single current cylinder, intermediate pressure cylinder 2, low pressure (LP) cylinder 3 are double-current cylinder, and this steam turbine is 5 cylinders, 6 steam discharge structural types.Be provided with high pressure rotor in the high-pressure cylinder 1; Press in rotor, the low pressure (LP) cylinder 3 in being provided with in the intermediate pressure cylinder 2 and be provided with low pressure rotor; High-pressure cylinder 1, intermediate pressure cylinder 2, low pressure (LP) cylinder 3 are arranged in order connection, and high pressure rotor, middle pressure rotor, low pressure rotor are through the coaxial successively connection of coupling, and this steam turbine is single shaft, single reheat steam turbine; Its high-pressure cylinder throttle (steam) temperature is 600 ℃-625 ℃, and the high-pressure cylinder initial steam pressure is 28-30MPa; The hot again throttle (steam) temperature of intermediate pressure cylinder is 610-635 ℃, and the steam-expelling port of intermediate pressure cylinder is through being communicated with the steam inlet of low pressure (LP) cylinder 3 connecting tube 4, and the exhaust steam pressure of low pressure (LP) cylinder 3 is 3.6-11.8kPa, and total leaving area of low pressure (LP) cylinder 3 is 75-25 ㎡.
High-pressure cylinder 1 is a double shell cylinder, and the outer shell of this high-pressure cylinder 1 is a cylinder type, is formed by connecting through axial bolts former and later two cylinder type cylinder bodies.The maximum characteristics of cylinder type high-pressure cylinder are that cylinder and bolt stress are low, and stress is concentrated little, and high temperature creep strength is high especially, thereby the steam turbine bearing capacity is strong, and unit reliability is high.According to thermodynamic analysis, the sort of relatively conventional pressure is up to the type of 25MP, and the hear rate benefit that improves because of bearing capacity is 33～55kJ/kWh, adds the factor that temperature improves, and what parameter improved must benefit reach as high as 100kJ/kWh.
High-pressure cylinder 1, intermediate pressure cylinder 2, low pressure (LP) cylinder 3 promptly adopt compact N+1 single shaft to hold supporting way for single shaft holds support, a bearing only is set between adjacent each cylinder supports; For present embodiment five cylinders six steam discharge structures, only need 6 bearings; Length has only 30～38m, has saved the wheelbase space more than the 10m, this steam turbine compact structure than traditional duplex bearing supporting way; Efficient is high, is fit to large capacity turbine and uses.
The bearing support of the high pressure rotor of this steam turbine, middle pressure rotor, low pressure rotor adopts and lands the mode that supports and install, and bearing support is fixed, and rotor and cylinder expand in the same way, and differential expansion is little; Be used the link of a large amount of compensation sound part displacements again, make unit possess red switch in quick 5 minutes and start and the FCB function.
Blade on turbine high-pressure rotor of the present invention, middle pressure rotor, the low pressure rotor is the full twisted blade of 3D; Add measures such as " steam guiding tube is not set ", " first order blade is tilting ", " rotor minor diameter ", " progression increase ", the unit hear rate hangs down 2% at least than other types.It is the definition that Yuhuan and Waigaoqiao Bonded Zone III adopt that the present invention takes GB GB5578 (declaration original text), by the guarantee value of locality back pressure in summer as name-plate rating, increases by 3% on this basis as the VWO flow, and EIAJ can reach 1350～1400MW.As the single shaft unit, there are not all before its capacity.
High-temperature component on the high-pressure cylinder of this steam turbine, the intermediate pressure cylinder (like valve, cylinder body, rotor etc.) all adopts 600-625 ℃ of ferrite material to process.The throughput that supplier has formed said material smelting and Big Steel Castings, forging blank is forged in present casting, and associated materials and technology belong to the scope of known technology.For reducing manufacture cost, reduce the application of refractory alloy steel, reduce the rotor forging size, the high-temperature rotor of this steam turbine, particularly high pressure rotor, middle pressure rotor promptly can adopt the monobloc forging structure, also can adopt welded structure.Welded rotor comprises admission section and steam discharge section two-part, and the admission section adopts 9%Cr or 10%Cr material, and the steam discharge section adopts the CrMoV material, admission section and the welding of steam discharge section.
The main thermodynamic performance of this embodiment's steam turbine is as shown in the table:
As stated, the name-plate rating of level steam turbines such as this ultra supercritical 1300MW can reach the 1300MW grade, and EIAJ is 1400MW, surpasses maximum at present 1100MW capacity; Its hear rate has reduced about 50～100kJ/kWh than present 1000MW unit, so this steam turbine has the advantage that output power is big, hear rate is low, meets present energy conservation and environment protection.There is this steam turbine can adopt 600-625 ℃ of ferrite material of present maturation to process again, need not to use expensive alloy material, so it also has low cost of manufacture, the advantage that cost performance is high.
In addition; The present invention can also be designed to other schemes as required, as is designed to four cylinders, four steam discharge structures, like Fig. 3, shown in 4; The major technique standard of unit is following: a single current high-pressure cylinder, a double-current intermediate pressure cylinder and two double-current low pressure (LP) cylinders, and the steam turbine inlet pressure is 28MPa; The steam turbine inlet temperature is 600 ℃; Reheat temperature is 620 ℃; Nominal output is 1260MW.A scheme is compared on this scheme, and its high pressure module is identical, but low-voltage module is two low pressure double fluid cylinders, and its total leaving area is 4 * 11 ㎡, adopts single shaft to hold supporting structure, only needs 5 bearings, and length generally has only 29m.
In sum; The existing relatively supercritical turbines of level steam turbine such as ultra supercritical 1300MW of the present invention; Its technique effect is very outstanding; Corresponding to existing supercritical turbine technology, its cost per kilowatt, generating hear rate and coal consumption can reduce synchronously, have high cost performance and market prospects.
The foregoing description is illustrative principle of the present invention and effect thereof only, but not is used to limit the present invention.Any be familiar with this technological personage all can be under spirit of the present invention and category, the foregoing description is modified or is changed.Therefore, have common knowledge the knowledgeable in the affiliated such as technical field, must contain by claim of the present invention not breaking away from all equivalence modifications of being accomplished under disclosed spirit and the technological thought or changing.
Claims (8)
1. level steam turbines such as ultra supercritical 1300MW is characterized in that it comprises:
One high-pressure cylinder is provided with high pressure rotor in the said high-pressure cylinder, and said high-pressure cylinder throttle (steam) temperature is 600 ℃-625 ℃, and said high-pressure cylinder initial steam pressure is 28-30MPa;
One intermediate pressure cylinder is pressed rotor in being provided with in the said intermediate pressure cylinder, the hot again throttle (steam) temperature of said intermediate pressure cylinder is 610 ℃-635 ℃;
Two or three low pressure (LP) cylinders are provided with low pressure rotor in the said low pressure (LP) cylinder, and the exhaust steam pressure of said low pressure (LP) cylinder is 3.6-11.8kPa;
Said high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder are arranged in order connection, and said high pressure rotor, middle pressure rotor, low pressure rotor are through the coaxial successively connection of coupling.
2. level steam turbines such as ultra supercritical 1300MW according to claim 1, it is characterized in that: said high-pressure cylinder is the single current cylinder, said intermediate pressure cylinder, low pressure (LP) cylinder are double-current cylinder.
3. level steam turbines such as ultra supercritical 1300MW according to claim 1, it is characterized in that: said high-pressure cylinder is a double shell cylinder, the outer shell of said high-pressure cylinder is formed by connecting through axial bolts former and later two cylinder type cylinder bodies.
4. level steam turbines such as ultra supercritical 1300MW according to claim 1, it is characterized in that: said high-pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder are that single shaft holds support.
5. level steam turbines such as ultra supercritical 1300MW according to claim 1; It is characterized in that: said high pressure rotor, middle pressure rotor comprise admission section and steam discharge section two-part; Said admission section adopts 9%Cr or 10%Cr material; Said steam discharge section adopts the CrMoV material, said admission section and the welding of said steam discharge section.
6. level steam turbines such as ultra supercritical 1300MW according to claim 1, it is characterized in that: the high-temperature component on said high-pressure cylinder, the intermediate pressure cylinder is 600-625 ℃ of ferrite material.
7. level steam turbines such as ultra supercritical 1300MW according to claim 1 is characterized in that: the bearing support of said high pressure rotor, middle pressure rotor, low pressure rotor lands support.
8. level steam turbines such as ultra supercritical 1300MW according to claim 1, it is characterized in that: the blade on said high pressure rotor, middle pressure rotor, the low pressure rotor is the full twisted blade of 3D.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102253617A CN102720546A (en) | 2012-07-02 | 2012-07-02 | Ultra-supercritical 1300MW grade steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102253617A CN102720546A (en) | 2012-07-02 | 2012-07-02 | Ultra-supercritical 1300MW grade steam turbine |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1605717A (en) * | 2003-10-10 | 2005-04-13 | 上海发电设备成套设计研究所 | Super-supercritical air cooling steam turbine |
| CN201802448U (en) * | 2010-08-31 | 2011-04-20 | 哈尔滨汽轮机厂有限责任公司 | Million-kilowatt (KW)-level supercritical air cooling turbine |
| CN102392703A (en) * | 2011-10-28 | 2012-03-28 | 上海电气电站设备有限公司 | Double reheat steam turbine |
| CN202756028U (en) * | 2012-07-02 | 2013-02-27 | 上海汽轮机厂有限公司 | Ultra-supercritical 1300-millon-watt (MW) steam turbine |
-
2012
- 2012-07-02 CN CN2012102253617A patent/CN102720546A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1605717A (en) * | 2003-10-10 | 2005-04-13 | 上海发电设备成套设计研究所 | Super-supercritical air cooling steam turbine |
| CN201802448U (en) * | 2010-08-31 | 2011-04-20 | 哈尔滨汽轮机厂有限责任公司 | Million-kilowatt (KW)-level supercritical air cooling turbine |
| CN102392703A (en) * | 2011-10-28 | 2012-03-28 | 上海电气电站设备有限公司 | Double reheat steam turbine |
| CN202756028U (en) * | 2012-07-02 | 2013-02-27 | 上海汽轮机厂有限公司 | Ultra-supercritical 1300-millon-watt (MW) steam turbine |
Non-Patent Citations (3)
| Title |
|---|
| 何阿平 等: "《上汽-西门子型百万千瓦超超临界汽轮机》", 《热力透平》, vol. 35, no. 1, 31 March 2006 (2006-03-31) * |
| 何阿平 等: "《开发高参数大容量汽轮机的关键和最佳解决方案》", 《中国动力工程学会600/1000MW超超临界机组技术交流2009年会论文集》, 13 May 2010 (2010-05-13), pages 38 - 48 * |
| 李祥苓: "《基于西门子-日立技术的超超临界1300-2000MW机组轴系设计探讨》", 《中国动力工程学会600/1000MW超超临界机组技术交流2009年会论文集》, 13 May 2010 (2010-05-13), pages 238 - 244 * |
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Application publication date: 20121010 |