CN204175341U - A kind of twin shaft air-cooled steam turbine generator group system - Google Patents
A kind of twin shaft air-cooled steam turbine generator group system Download PDFInfo
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- CN204175341U CN204175341U CN201420568671.3U CN201420568671U CN204175341U CN 204175341 U CN204175341 U CN 204175341U CN 201420568671 U CN201420568671 U CN 201420568671U CN 204175341 U CN204175341 U CN 204175341U
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Abstract
A kind of twin shaft air-cooled steam turbine generator group system, comprises the coaxial high-pressure cylinder arranged, intermediate pressure cylinder and low pressure (LP) cylinder; Described intermediate pressure cylinder draws the mesolow cross over pipe being used for steam discharge, and a road of mesolow cross over pipe is connected to low pressure (LP) cylinder, and butterfly valve of separately leading up to is connected to auxiliary low pressure cylinder; Described low pressure (LP) cylinder connects main vapour condenser, and auxiliary low pressure cylinder connects auxiliary vapour condenser, and generator is connected to the output terminal of low pressure (LP) cylinder, and auxiliary low pressure cylinder connects auxiliary generator.The utility model is by increasing auxiliary low pressure cylinder, low pressure (LP) cylinder and auxiliary low pressure cylinder is made all to be in best through-flow operating mode at design point, auxiliary low pressure cylinder and auxiliary generator form another one and to generate electricity axle system, can need to select to run or stop transport according to volume flowrate and scheduling, Air-cooled Unit generating efficiency is improved with this, in addition, auxiliary low pressure cylinder and auxiliary generator also can directly run as house generator, reduce station service power consumption rate, meet the demand of thermal power plant to multiaxis air-cooled steam turbine generator group.
Description
Technical field
The utility model belongs to engineering field, thermal power plant, is specifically related to a kind of twin shaft air-cooled steam turbine generator group system.
Background technique
Along with developing rapidly of power industry, the near coal-mine fired power generating unit of Large Copacity high parameter constantly increases, although these units solve coal fuel source deficiency and transportation problem, but encounter the problem of the shortage of water resources in rich coal area, the fast development of therefore power industry is inevitably restricted.In order to the electricity needs that the satisfied whole nation is growing, use power station Air-cooled Unit to substitute wet type cooling unit, " bottleneck " that solve " rich coal lack of water " area or construction thermal power plant, arid area becomes current prefered method.
Air-cooled Unit back pressure is high, and economy is large, summer condition back pressure is close to 3 times of design back-pressure, under causing different operating mode, the change of steam discharge volume flowrate greatly, so steam turbine factory is when designing steam turbine low pressure (LP) cylinder, in order to take into account the large feature of Air-cooled Unit economy, low pressure (LP) cylinder is through-flow all not at best open position, winter, steam discharge loss was large, there is the separation of flow loss summer.General Air-cooled Unit is ensureing under the prerequisite that design conditions have compared with high throughflow internal efficiency, summer, high back pressure operating mode low pressure (LP) cylinder internal efficiency only had about 81%, far below design conditions low pressure (LP) cylinder internal efficiency about 90%, especially lower than the low pressure (LP) cylinder internal efficiency of wet type cooling unit 90% ~ 92%, this causes the low major reason of Air-cooled Unit generating efficiency.
Model utility content
The purpose of this utility model is for problem in above-mentioned prior art, provides a kind of twin shaft air-cooled steam turbine generator group system that can improve Air-cooled Unit generating efficiency.
To achieve these goals, the technical solution adopted in the utility model is: comprise the coaxial high-pressure cylinder arranged, intermediate pressure cylinder and low pressure (LP) cylinder; Described intermediate pressure cylinder draws the mesolow cross over pipe being used for steam discharge, and a road of mesolow cross over pipe is connected to low pressure (LP) cylinder, and butterfly valve of separately leading up to is connected to auxiliary low pressure cylinder; Described low pressure (LP) cylinder connects main vapour condenser, and auxiliary low pressure cylinder connects auxiliary vapour condenser, and generator is connected to the output shaft end of low pressure (LP) cylinder, and auxiliary low pressure cylinder connects auxiliary generator.
Described auxiliary low pressure cylinder, when system cloud gray model rated load and specified back pressure, is opened butterfly valve completely and drives auxiliary generator, makes low pressure (LP) cylinder and auxiliary low pressure cylinder all in the through-flow operating mode of the best; Described specified back pressure is the back pressure that annual mean temperature is corresponding.
Described auxiliary low pressure cylinder when system cloud gray model sub load or system cloud gray model rated load and back pressure close butterfly valve higher than during specified back pressure 0 ~ 20kPa, make low pressure (LP) cylinder near best through-flow operating mode; Described specified back pressure is the back pressure that annual mean temperature is corresponding.
Described low pressure (LP) cylinder and auxiliary low pressure cylinder steam discharge form whole generator set steam turbine steam discharge.
Compared with prior art, the utility model is for the low shortcoming of current Air-cooled Unit low pressure (LP) cylinder internal efficiency, steam discharge one tunnel of intermediate pressure cylinder is connected to low pressure (LP) cylinder, butterfly valve of separately leading up to connects auxiliary low pressure cylinder, low pressure (LP) cylinder connects main vapour condenser, and auxiliary low pressure cylinder connects auxiliary vapour condenser, by increasing auxiliary low pressure cylinder, make low pressure (LP) cylinder and auxiliary low pressure cylinder all be in best through-flow operating mode at design point, thus improve low pressure (LP) cylinder and auxiliary low pressure cylinder internal efficiency; Auxiliary low pressure cylinder is through-flow according to design conditions and high back pressure operating mode volume flowrate situation of change design in summer, can be realized low pressure (LP) cylinder when summer condition auxiliary low pressure cylinder excises and also can run in the through-flow operating mode of the best, thus improve summer condition low pressure (LP) cylinder internal efficiency.Generator is connected to the output terminal of low pressure (LP) cylinder, and auxiliary low pressure cylinder connects auxiliary generator; Auxiliary low pressure cylinder and auxiliary generator form another one and to generate electricity axle system, the admission of auxiliary low pressure cylinder is connected by mesolow cross over pipe and butterfly valve, by controlling butterfly valve, auxiliary low pressure cylinder and auxiliary generator can need to select to run or stop transport according to volume flowrate and scheduling.In addition, auxiliary low pressure cylinder and auxiliary generator also can directly run as house generator, reduce station service power consumption rate, meet the demand of thermal power plant to multiaxis air-cooled steam turbine generator group.
Further, the utility model low pressure (LP) cylinder and auxiliary low pressure cylinder steam discharge form the steam turbine steam discharge of whole generator set, at Air-cooled Unit length of blade by increasing leaving area in limited time, reducing steam discharge loss, reducing unit and blocking back pressure.
Accompanying drawing explanation
The structural representation of Fig. 1 the utility model system;
In accompanying drawing: 1. high-pressure cylinder; 2. intermediate pressure cylinder; 3. low pressure (LP) cylinder; 4. main vapour condenser; 5. auxiliary low pressure cylinder; 6. auxiliary vapour condenser; 7. generator; 8. auxiliary generator; 9. butterfly valve; 10. mesolow coupling cock.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
See Fig. 1, the utility model comprises the coaxial high-pressure cylinder 1 arranged, intermediate pressure cylinder 2 and low pressure (LP) cylinder 3; Steam discharge one tunnel is connected to low pressure (LP) cylinder 3 by mesolow cross over pipe 10 by intermediate pressure cylinder 2, and butterfly valve 9 of separately leading up to is connected to auxiliary low pressure cylinder 5; Low pressure (LP) cylinder 3 connects main vapour condenser 4, and auxiliary low pressure cylinder 5 connects auxiliary vapour condenser 5, and generator 7 is connected to the output shaft end of low pressure (LP) cylinder 3, and auxiliary low pressure cylinder 5 connects auxiliary generator 8.
The utility model power plant motor adopts twin shaft air-cooled steam turbine generator group to drive, and when system cloud gray model rated load and specified back pressure, auxiliary low pressure cylinder 5 is connected with auxiliary generator 8, forms an axle system and drives auxiliary generator 8 to generate electricity; When system cloud gray model sub load or system cloud gray model rated load and back pressure higher than specified back pressure certain value time, close butterfly valve 9, auxiliary low pressure cylinder 5 out of service and auxiliary generator 8, concrete numerical value higher than specified back pressure is determined by the hours of operation of steam turbine low pressure (LP) cylinder and auxiliary low pressure cylinder leaving area, steam turbine back pressure and corresponding back pressure, the optimization of cylinder body internal efficiency, is generally 0 ~ 20kPa.Low pressure (LP) cylinder 3 and auxiliary low pressure cylinder 5 are always through-flow according to the specified back pressure design of rated load, can be made low pressure (LP) cylinder 3 and auxiliary low pressure cylinder 5 all be in best through-flow operating mode at design point, thus improves low pressure (LP) cylinder 3 and auxiliary low pressure cylinder 5 internal efficiency; Auxiliary low pressure cylinder 5 is through-flow can according to design conditions and high back pressure operating mode volume flowrate situation of change design in summer, to realize low pressure (LP) cylinder 3 when summer condition auxiliary low pressure cylinder 5 excises also to run in the through-flow operating mode of the best, thus to improve the efficiency in summer condition low pressure (LP) cylinder 3.Auxiliary low pressure cylinder 5 connects auxiliary generator 8, composition another one generating axle system, auxiliary low pressure cylinder 5 admission is connected by mesolow cross over pipe 10 and butterfly valve 9, auxiliary low pressure cylinder 5 and auxiliary generator 8 can need to select to run or stop transport according to volume flowrate and scheduling, also can directly run as house generator.
The utility model is for the low shortcoming of current Air-cooled Unit low pressure (LP) cylinder internal efficiency, the flow efficiency of low pressure (LP) cylinder is improved from basic design, entire system flexible operation, whole unit generation overall efficiency is high, auxiliary low pressure cylinder and auxiliary generator also can run as house generator, reduce station service power consumption rate, there is features such as improving low pressure (LP) cylinder efficiency, saving gross coal consumption rate, raising power plant income, can apply in engineering, for thermal power plant reduction gross coal consumption rate, raising power plant income provide a reasonable solution.
Although be described the utility model by reference to the accompanying drawings above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, can also make a lot of distortion, these all belong within protection of the present utility model.
Claims (4)
1. a twin shaft air-cooled steam turbine generator group system, is characterized in that: comprise the coaxial high-pressure cylinder (1) arranged, intermediate pressure cylinder (2) and low pressure (LP) cylinder (3); Described intermediate pressure cylinder (2) draws the mesolow cross over pipe (10) being used for steam discharge, one tunnel of mesolow cross over pipe (10) is connected to low pressure (LP) cylinder (3), and butterfly valve (9) of separately leading up to is connected to auxiliary low pressure cylinder (5); Described low pressure (LP) cylinder (3) connects main vapour condenser (4), auxiliary low pressure cylinder (5) connects auxiliary vapour condenser (6), generator (7) is connected to the output shaft end of low pressure (LP) cylinder (3), and auxiliary low pressure cylinder (5) connects auxiliary generator (8).
2. twin shaft air-cooled steam turbine generator group system according to claim 1, it is characterized in that: described auxiliary low pressure cylinder (5) is when system cloud gray model rated load and specified back pressure, open butterfly valve (9) completely and drive auxiliary generator (8), making low pressure (LP) cylinder (3) and auxiliary low pressure cylinder (5) all in the through-flow operating mode of the best; Described specified back pressure is the back pressure that annual mean temperature is corresponding.
3. twin shaft air-cooled steam turbine generator group system according to claim 1, it is characterized in that: described auxiliary low pressure cylinder (5) when system cloud gray model sub load or system cloud gray model rated load and back pressure close butterfly valve (9) higher than during specified back pressure 0 ~ 20kPa, make low pressure (LP) cylinder (3) near best through-flow operating mode; Described specified back pressure is the back pressure that annual mean temperature is corresponding.
4. twin shaft air-cooled steam turbine generator group system according to claim 1, is characterized in that: described low pressure (LP) cylinder (3) and auxiliary low pressure cylinder (5) steam discharge form whole generator set steam turbine steam discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420568671.3U CN204175341U (en) | 2014-09-29 | 2014-09-29 | A kind of twin shaft air-cooled steam turbine generator group system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420568671.3U CN204175341U (en) | 2014-09-29 | 2014-09-29 | A kind of twin shaft air-cooled steam turbine generator group system |
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| CN204175341U true CN204175341U (en) | 2015-02-25 |
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| CN201420568671.3U Active CN204175341U (en) | 2014-09-29 | 2014-09-29 | A kind of twin shaft air-cooled steam turbine generator group system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060918A (en) * | 2017-04-14 | 2017-08-18 | 贵州电网有限责任公司电力科学研究院 | A kind of many low pressure (LP) cylinder steam turbine generator set system optimization device and methods |
| CN108119190A (en) * | 2016-11-27 | 2018-06-05 | 冯伟忠 | A kind of Optimization of Steam Turbine configuration system and method for split axle arrangement |
| CN111042881A (en) * | 2018-10-12 | 2020-04-21 | 上海明华电力技术工程有限公司 | Wide-load high-efficiency steam turbine generator unit with part of cylinders capable of being cut off |
-
2014
- 2014-09-29 CN CN201420568671.3U patent/CN204175341U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108119190A (en) * | 2016-11-27 | 2018-06-05 | 冯伟忠 | A kind of Optimization of Steam Turbine configuration system and method for split axle arrangement |
| CN107060918A (en) * | 2017-04-14 | 2017-08-18 | 贵州电网有限责任公司电力科学研究院 | A kind of many low pressure (LP) cylinder steam turbine generator set system optimization device and methods |
| CN111042881A (en) * | 2018-10-12 | 2020-04-21 | 上海明华电力技术工程有限公司 | Wide-load high-efficiency steam turbine generator unit with part of cylinders capable of being cut off |
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