CN102705016A - Supercritical 600MW heat supplying extraction steam turbine - Google Patents
Supercritical 600MW heat supplying extraction steam turbine Download PDFInfo
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- CN102705016A CN102705016A CN2012102066358A CN201210206635A CN102705016A CN 102705016 A CN102705016 A CN 102705016A CN 2012102066358 A CN2012102066358 A CN 2012102066358A CN 201210206635 A CN201210206635 A CN 201210206635A CN 102705016 A CN102705016 A CN 102705016A
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Abstract
The invention provides a supercritical 600MW heat supplying extraction steam turbine, relating to supercritical extraction steam turbines. The supercritical 600MW heat supplying extraction steam turbine is used for solving the problem of low heat efficiency of the existing subcritical/supercritical 350MW heat supplying extraction steam turbine. A supercritical 600MW steam-extraction middle bearing box is arranged between one end of a supercritical 600MW steam-extraction high-pressure cylinder and one end of a supercritical 600MW steam-extraction low-pressure cylinder; a supercritical 600MW steam-extraction rear bearing box is arranged at the other end of the supercritical 600MW steam-extraction low-pressure cylinder; a supercritical 600MW steam-extraction front bearing box is arranged at the other end of the supercritical 600MW steam-extraction high-pressure cylinder; the other end of the supercritical 600MW steam-extraction high-pressure cylinder is communicated with one end of the supercritical 600MW steam-extraction low-pressure cylinder through a supercritical 600MW steam-extraction medium/low-pressure communicating pipe; and the supercritical 600MW steam-extraction low-pressure cylinder, the supercritical 600MW steam-extraction front bearing box, the supercritical 600MW steam-extraction middle bearing box and the supercritical 600MW steam-extraction rear bearing box are respectively and independently landed. The supercritical 600MW heat supplying extraction steam turbine is applied to the cogeneration of heat and power.
Description
Technical field
The present invention relates to a kind of supercritical pressure turbine that draws gas.
Background technique
China's existing fired power generating unit power devices coal consumption is high; Not only energy utilization rate is low but also increased the discharge amount of pollutant; Therefore reduce coal-fired unit coal consumption energetically and reduce to pollute and become the task of top priority, and the overcritical coal heating unit of faster development to be China current is improving using energy source, improving the practical measure that is significant of environment.The domestic heat supply unit parameter that puts into operation at present be mainly subcritical or subcritical below, maximum capacity is 300MW, the maximum amount of drawing gas 550t/h, the capacity of unit have also limited the development of unit heating load.Be energy saving, improve the steam parameter of conventional fired power generating unit and raise the efficiency that the 600MW grade heat supply supercritical pressure turbine that draws gas has the stronger vitality and the market competitiveness.
Summary of the invention
The purpose of this invention is to provide a kind of 600MW grade heat supply supercritical pressure turbine that draws gas, to solve the existing low problem of the subcritical and overcritical 350MW heat supply extraction turbine thermal efficiency.
The present invention solves the problems of the technologies described above the technological scheme of taking to be: said steam turbine comprises that overcritical 600MW high intermediate pressure cylinder, overcritical 600MW low pressure (LP) cylinder, overcritical 600MW fore bearing case, overcritical 600MW draw gas after the bearing box and the overcritical 600MW of middle (center) bearing case, overcritical 600MW that draw gas that draw gas that draw gas that draw gas draws gas mesolow connecting tube; A draw gas end and the overcritical 600MW of high intermediate pressure cylinder of overcritical 600MW draws gas and is provided with the overcritical 600MW middle (center) bearing case that draws gas between the end of low pressure (LP) cylinder; The draw gas the other end of low pressure (LP) cylinder of overcritical 600MW is provided with the overcritical 600MW after the bearing box that draws gas; The draw gas the other end of high intermediate pressure cylinder of overcritical 600MW is provided with the overcritical 600MW fore bearing case that draws gas; The draw gas the other end of high intermediate pressure cylinder of overcritical 600MW is communicated with through overcritical 600MW the draw gas end of low pressure (LP) cylinder of mesolow connecting tube and overcritical 600MW that draws gas, and overcritical 600MW low pressure (LP) cylinder, overcritical 600MW fore bearing case, overcritical 600MW middle (center) bearing case and the overcritical 600MW after the bearing box that draws gas that draws gas that draws gas that draws gas lands alone respectively.
The present invention has following beneficial effect: the present invention adopts overcritical steam inlet condition, and main steam pressure is 24.2MPa, and the temperature of main steam and reheated steam is 566 ℃.Cylinder structure of the present invention is advanced, and complete machine is arranged unique, and generatine set heat efficiency is high.Is a new developing direction on the present electricity market with the 600MW unit as the heat supply unit.Consider from the energy-saving and environmental protection angle, 600MW ultra-high parameter, vast capacity unit as the heat supply unit, are more and more received the investor's of cogeneration of heat and power construction project favor.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present invention, and Fig. 2 is the plan view of Fig. 1, and Fig. 3 is the sectional arrangement drawing of Fig. 1.
Embodiment
Embodiment one: combine Fig. 1-Fig. 3 that this mode of execution is described; The said steam turbine of this mode of execution comprises that overcritical 600MW high intermediate pressure cylinder 1, overcritical 600MW low pressure (LP) cylinder 2, overcritical 600MW fore bearing case 3, overcritical 600MW draw gas after the bearing box 5 and the overcritical 600MW of middle (center) bearing case 4, overcritical 600MW that draw gas that draw gas that draw gas that draw gas draws gas mesolow connecting tube 6; A draw gas end and the overcritical 600MW of high intermediate pressure cylinder 1 of overcritical 600MW draws gas and is provided with the overcritical 600MW middle (center) bearing case 4 that draws gas between the end of low pressure (LP) cylinder 2; The draw gas the other end of low pressure (LP) cylinder 2 of overcritical 600MW is provided with the overcritical 600MW after the bearing box 5 that draws gas; The draw gas the other end of high intermediate pressure cylinder 1 of overcritical 600MW is provided with the overcritical 600MW fore bearing case 3 that draws gas; The draw gas the other end of high intermediate pressure cylinder 1 of overcritical 600MW is communicated with through overcritical 600MW the draw gas end of low pressure (LP) cylinder 2 of mesolow connecting tube 6 and overcritical 600MW that draws gas, and overcritical 600MW low pressure (LP) cylinder 2, overcritical 600MW fore bearing case 3, overcritical 600MW middle (center) bearing case 4 and the overcritical 600MW after the bearing box 5 that draws gas that draws gas that draws gas that draws gas lands alone respectively.
The present invention comprises that also 7, two Middle pressure valves 8 of two high pressure valves are arranged in the both sides of this mode of execution unit.Overcritical 600MW draw gas high intermediate pressure cylinder 1 high pressure double-entry respectively with high pressure valve 7 welding.Overcritical 600MW draw gas high intermediate pressure cylinder 1 middle pressure double-entry respectively with Middle pressure valve 8 welding.
This mode of execution guarantees the influence that the bearing absolute altitude is not expanded by cylinder body, makes bearing have good stable property.
Embodiment two: combine Fig. 3 that this mode of execution is described, the described overcritical 600MW of this mode of execution high intermediate pressure cylinder 1 that draws gas is made up of high pressure outer shell 1-1, middle pressure thermal shield 1-2, the 1-3 of nozzle box, high-pressure inner cylinder 1-4, high pressure cylinder end packing 1-5, high pressure rotor 1-6 and middle pressure diaphragm housing ring 1-7; High-pressure inner cylinder 1-4 is contained in the high pressure outer shell 1-1; High pressure rotor 1-6 is housed in the high-pressure inner cylinder 1-4 vertically; High pressure outer shell 1-1 and overcritical 600MW draw gas high pressure cylinder end packing 1-5 are housed between the fore bearing case 3, and the 1-3 of nozzle box is housed in the high-pressure inner cylinder 1-4, press thermal shield 1-2 in being equipped with on the high pressure rotor 1-6 between 1-3 of nozzle box and the middle pressure diaphragm housing ring 1-7; The middle diaphragm housing ring 1-4 that presses is fixedly connected with high pressure outer shell 1-1; This mode of execution has increased the high pressure rotor, strengthens intermediate pressure cylinder end two grade blades, adapts to the unit requirement of drawing gas.Other mode of execution is identical with embodiment one.Other mode of execution is identical with embodiment one.
In press the heat supply parameter of drawing gas: extraction pressure is greater than 2.0Mpa, and extraction temperature is more than or equal to 250 ℃, and the corresponding design heating load of the specified amount of drawing gas is 41.2t/h, the enthalpy 2902.37KJ/Kg of design heating load parameter; The corresponding design heating load of the maximum amount of drawing gas is 100t/h, and the enthalpy of design heating load parameter is 2902.37KJ/Kg; The middle heat supply exhaust point position of pressing: middle pressure is drawn gas for three sections; Middle pressure heat supply extraction pressure is 2.1MPa; Middle pressure heat supply extraction temperature is 455.4 ℃.
Embodiment three: combine Fig. 1 that this mode of execution is described; The overcritical 600MW of this mode of execution low pressure (LP) cylinder 2 that draws gas is made up of lp outer casing 2-1, low-pressure internal cylinder 2-2, low pressure rotor 2-3, low pressure cylinder end packing 2-4 and expansion joint 2-5; Low-pressure internal cylinder 2-2 is contained in the lp outer casing 2-1, and low pressure rotor 2-3 is housed in the low-pressure internal cylinder 2-2 vertically, and lp outer casing 2-1 and overcritical 600MW draw gas low pressure cylinder end packing 2-4 is housed between the middle (center) bearing case 4; Be connected through expansion joint 2-5 between low pressure cylinder end packing 2-4 and the lp outer casing 2-1; This mode of execution has increased the high pressure rotor, strengthens intermediate pressure cylinder end two grade blades, adapts to the unit requirement of drawing gas.Other mode of execution is identical with embodiment one.
Low pressure heat supply (can adjust and the draw gas) parameter of drawing gas: extraction pressure is greater than 1.20Mpa, and extraction temperature is more than or equal to 230 ℃, and the corresponding design heating load of the specified amount of drawing gas is 694t/h, and the enthalpy of design heating load parameter is 2888.64KJ/Kg; The corresponding design heating load of the maximum amount of drawing gas is 850t/h, and the enthalpy of design heating load parameter is 2888.64KJ/Kg; Low pressure heat supply exhaust point position: middle pressure vapour; Low pressure heat supply extraction pressure is 1.2MPa; Low pressure heat supply extraction temperature is 377.0 ℃.
Claims (3)
1. the 600MW grade heat supply supercritical pressure turbine that draws gas; It is characterized in that said steam turbine comprises that overcritical 600MW high intermediate pressure cylinder (1), overcritical 600MW low pressure (LP) cylinder (2), overcritical 600MW fore bearing case (3), overcritical 600MW draw gas after the bearing box (5) and the overcritical 600MW of middle (center) bearing case (4), overcritical 600MW that draw gas that draw gas that draw gas that draw gas draws gas mesolow connecting tube (6); A draw gas end and the overcritical 600MW of high intermediate pressure cylinder (1) of overcritical 600MW draws gas and is provided with the overcritical 600MW middle (center) bearing case (4) that draws gas between the end of low pressure (LP) cylinder (2); The draw gas the other end of low pressure (LP) cylinder (2) of overcritical 600MW is provided with the overcritical 600MW after the bearing box (5) that draws gas; The draw gas the other end of high intermediate pressure cylinder (1) of overcritical 600MW is provided with the overcritical 600MW fore bearing case (3) that draws gas; The draw gas the other end of high intermediate pressure cylinder (1) of overcritical 600MW is communicated with through overcritical 600MW the draw gas end of low pressure (LP) cylinder (2) of mesolow connecting tube (6) and overcritical 600MW that draws gas, and overcritical 600MW low pressure (LP) cylinder (2), overcritical 600MW fore bearing case (3), overcritical 600MW middle (center) bearing case (4) and the overcritical 600MW after the bearing box (5) that draws gas that draws gas that draws gas that draws gas lands alone respectively.
2. the 600MW grade according to claim 1 heat supply supercritical pressure turbine that draws gas is characterized in that the described overcritical 600MW high intermediate pressure cylinder (1) that draws gas comprises high pressure outer shell (1-1), middle pressure thermal shield (1-2), nozzle box (1-3), high-pressure inner cylinder (1-4), high pressure cylinder end packing (1-5), high pressure rotor (1-6) and middle pressure diaphragm housing ring (1-7); High-pressure inner cylinder (1-4) is contained in the high pressure outer shell (1-1); High pressure rotor (1-6) is housed in the high-pressure inner cylinder (1-4) vertically; High pressure outer shell (1-1) and overcritical 600MW draw gas high pressure cylinder end packing end packing (1-5) are housed between the fore bearing case (3); Nozzle box (1-3) is housed in the high-pressure inner cylinder (1-4), presses thermal shield (1-2) in being equipped with on the high pressure rotor (1-6) between nozzle box (1-3) and the middle pressure diaphragm housing ring (1-7), middle pressure diaphragm housing ring (1-7) is fixedly connected with high pressure outer shell (1-1).
3. the 600MW grade according to claim 1 heat supply supercritical pressure turbine that draws gas; It is characterized in that the described overcritical 600MW low pressure (LP) cylinder (2) that draws gas comprises lp outer casing (2-1), low-pressure internal cylinder (2-2), low pressure rotor (2-3), low pressure cylinder end packing (2-4) and expansion joint (2-5); Low-pressure internal cylinder (2-2) is contained in the lp outer casing (2-1); Low pressure rotor (2-3) is housed in the low-pressure internal cylinder (2-2) vertically; Lp outer casing (2-1) and overcritical 600MW draw gas low pressure cylinder end packing (2-4) are housed between the middle (center) bearing case (4), are connected through expansion joint (2-5) between low pressure cylinder end packing (2-4) and the lp outer casing (2-1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102066358A CN102705016A (en) | 2012-06-21 | 2012-06-21 | Supercritical 600MW heat supplying extraction steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102066358A CN102705016A (en) | 2012-06-21 | 2012-06-21 | Supercritical 600MW heat supplying extraction steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664281A (en) * | 2021-01-20 | 2021-04-16 | 济宁华源热电有限公司 | Be used for overcritical 350MW three jar steam turbine middling pressure module |
Citations (7)
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| JPH04128502A (en) * | 1990-09-19 | 1992-04-30 | Hitachi Ltd | Steam turbine plant |
| CN2861494Y (en) * | 2005-11-25 | 2007-01-24 | 哈尔滨汽轮机厂有限责任公司 | Three-cylinder hypercritical air cooling turbine |
| CN2874026Y (en) * | 2005-11-24 | 2007-02-28 | 哈尔滨汽轮机厂有限责任公司 | Two cylinder ultra super critical air cooling turbine |
| CN101196126A (en) * | 2007-12-29 | 2008-06-11 | 东方电气集团东方汽轮机有限公司 | High-power twin-cylinder double flow turbine |
| CN101418705A (en) * | 2008-11-25 | 2009-04-29 | 东方电气集团东方汽轮机有限公司 | 300-400MW supercritical two-cylinder two-exhaust condensing turbine |
| EP2180149A1 (en) * | 2008-08-11 | 2010-04-28 | Mitsubishi Heavy Industries, Ltd. | Steam turbine equipment |
| CN202596801U (en) * | 2012-06-21 | 2012-12-12 | 哈尔滨汽轮机厂有限责任公司 | 600MW level heat supply and steam extraction supercritical steam turbine |
-
2012
- 2012-06-21 CN CN2012102066358A patent/CN102705016A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04128502A (en) * | 1990-09-19 | 1992-04-30 | Hitachi Ltd | Steam turbine plant |
| CN2874026Y (en) * | 2005-11-24 | 2007-02-28 | 哈尔滨汽轮机厂有限责任公司 | Two cylinder ultra super critical air cooling turbine |
| CN2861494Y (en) * | 2005-11-25 | 2007-01-24 | 哈尔滨汽轮机厂有限责任公司 | Three-cylinder hypercritical air cooling turbine |
| CN101196126A (en) * | 2007-12-29 | 2008-06-11 | 东方电气集团东方汽轮机有限公司 | High-power twin-cylinder double flow turbine |
| EP2180149A1 (en) * | 2008-08-11 | 2010-04-28 | Mitsubishi Heavy Industries, Ltd. | Steam turbine equipment |
| CN101418705A (en) * | 2008-11-25 | 2009-04-29 | 东方电气集团东方汽轮机有限公司 | 300-400MW supercritical two-cylinder two-exhaust condensing turbine |
| CN202596801U (en) * | 2012-06-21 | 2012-12-12 | 哈尔滨汽轮机厂有限责任公司 | 600MW level heat supply and steam extraction supercritical steam turbine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664281A (en) * | 2021-01-20 | 2021-04-16 | 济宁华源热电有限公司 | Be used for overcritical 350MW three jar steam turbine middling pressure module |
| CN112664281B (en) * | 2021-01-20 | 2024-05-28 | 济宁华源热电有限公司 | Medium-pressure module for supercritical 350MW three-cylinder steam turbine |
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Application publication date: 20121003 |