CN203420745U - Steam cylinder pre-heating system for turbines - Google Patents
Steam cylinder pre-heating system for turbines Download PDFInfo
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- CN203420745U CN203420745U CN201320398050.0U CN201320398050U CN203420745U CN 203420745 U CN203420745 U CN 203420745U CN 201320398050 U CN201320398050 U CN 201320398050U CN 203420745 U CN203420745 U CN 203420745U
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- 238000010438 heat treatment Methods 0.000 title abstract 2
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 238000012802 pre-warming Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000000295 fuel oil Substances 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model relates to the field of turbines, in particular to a steam cylinder preheating system for the turbines. The steam cylinder preheating system comprises a low-pressure auxiliary steam header and a small turbine steam supply pipeline, the low-pressure auxiliary steam header is connected with a small turbine through the small turbine steam supply pipeline. The steam cylinder pre-heating system further comprises a connection pipeline and a separation valve. The small turbine steam supply pipeline is communicated with a front drainage pipeline of a high-discharge check door of a high-pressure cylinder of a main turbine through the connection pipeline, and the separation valve is arranged on connection pipeline. Before ignition of a unit, an adjacent machine auxiliary steam header supplies steam to the low-pressure auxiliary steam header, then adjacent machine auxiliary steam enters the high-pressure cylinder of the turbine for preheating an steam cylinder through the connection pipeline arranged between the portion from the low-pressure auxiliary steam header to the small turbine steam supply pipeline to the front drainage pipeline of the high-discharge check door of the turbine, the starting time of the unit can be shortened by at least 1.5 hours, and therefore a great amount of fuel oil is saved.
Description
Technical field
The utility model relates to steam turbine field, specifically a kind of steam turbine pre-warming system.
Background technique
Before the Starting mode of steam turbine power generation unit starts according to steam turbine, the temperature of high-pressure cylinder is just divided cold start and hot starting, hot start.High-pressure cylinder first order cylinder temperature, lower than 150 ℃, is cold start.While adopting cold start mode, before steam turbine red switch, need high-pressure cylinder to carry out pre-warm, to prevent owing to causing cylinder deformation inhomogeneous because temperature variation is excessive in steam turbine start-up course.During current unit cold start process, steam turbine pre-warm is all after ignition of the boiler, and main vapour pressure rises to 0.7MPa, and steam temperature more than 180 ℃, carries out steam turbine high pressure cylinder pre-warming by steam turbine high-pressure cylinder steam discharge non-return flap bypass power door operation, affects unit starting efficiency.
Model utility content
For power station in prior art in unit maintenance or long-time standby rear startup, need after ignition of the boiler, steam reaches after certain pressure and temperature, just can carry out steam turbine pre-warm, the shortcomings such as oversize, a large amount of fuel consumption of unit starting time, the utility model provides a kind of steam turbine pre-warming system.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of steam turbine pre-warming system, comprise the auxiliary vapour header of low pressure and small turbine steam line, the auxiliary vapour header of described low pressure is connected with small turbine by small turbine steam line, also comprise connecting tube and separation valve door, before described small turbine steam line is arranged non-return flap by connecting tube with the height of main steam turbine high-pressure cylinder, drain water piping is communicated with, and described separation valve door is arranged on connecting tube;
Described separation valve door is two, and one of them is power door operation;
Described small turbine steam line is provided with steam supply valve;
Described steam supply valve is arranged on the small turbine steam line being communicated with between the auxiliary vapour header of low pressure and connecting tube.
The beneficial effects of the utility model:
The utility model is before unit igniting, by auxiliary vapour header steam supply as the occasion requires to the auxiliary vapour header of the machine low pressure, the connecting tube being installed additional drain pipe before high row's non-return flap to small turbine steam line to steam turbine by the auxiliary vapour header of the machine low pressure again, make as the occasion requires auxiliary steam enter steam turbine high-pressure cylinder and carry out cylinder pre-warm, at least can shorten 1.5 hours unit starting time, save great amount of fuel oil;
The utility model only need to install connecting tube and separation valve door additional between drain water piping at the auxiliary vapour header of low pressure to small turbine steam line and high the row before non-return flap of steam turbine, by control the machine steam supply valve or control little machine steam line with the high row of steam turbine non-return flap before drain water piping get in touch with pipeline isolating door aperture, control the pressure of cylinder pre-warm, thereby control cylinder pre-warm speed, simple to operate, convenient and practical.
Accompanying drawing explanation
Fig. 1 the utility model structural representation;
Reference character: 1, main inlet throttle-stop valve, 2, reheat emergency valve, 3, main steam turbine high-pressure cylinder, 4, intermediate pressure cylinder, 5, high row's non-return flap, 6, bypass door, 7, vapour condenser, 8, drain water piping before high row's non-return flap, 9, the auxiliary vapour header of low pressure, 10, steam supply valve, 11, small turbine steam line, 12, connecting tube, 13, separation valve door.
Embodiment
Below in conjunction with embodiment, the utility model is further elaborated.
As shown in the figure: a kind of steam turbine pre-warming system, comprise the auxiliary vapour header 9 of low pressure and small turbine steam line 11, the auxiliary vapour header 9 of described low pressure is connected with small turbine by small turbine steam line 11, also comprise connecting tube 12 and separation valve door 13, described small turbine steam line 11 is communicated with the front drain water piping 8 of height row non-return flap of main steam turbine high-pressure cylinder 3 by connecting tube 12, and described separation valve door 13 is arranged on connecting tube 12; Described separation valve door 13 is two, and one of them is power door operation; Described small turbine steam line 11 is provided with steam supply valve 10; Described steam supply valve 10 is arranged on the small turbine steam line 11 being communicated with between the auxiliary vapour header 9 of low pressure and connecting tube 12.
In prior art, during unit cold start, steam turbine pre-warm is all after ignition of the boiler, and main vapour pressure rises to 0.7MPa, and steam temperature more than 180 ℃, carries out steam turbine high pressure cylinder pre-warming by the bypass door 6 of the high row of steam turbine high-pressure cylinder non-return flap 5, affects the unit starting time;
This pre-warming system is before unit igniting, by auxiliary vapour header steam supply as the occasion requires to the auxiliary vapour header 9 of low pressure, by the auxiliary vapour header 9 of low pressure, by small turbine steam line 11, be connected to drain water piping 8 before the high row of steam turbine non-return flap again, make as the occasion requires auxiliary steam enter main steam turbine high-pressure cylinder 3 and carry out cylinder pre-warm, by turbine high-pressure, regulated, through steam turbine porthole conduit pipe, enter vapour condenser 7;
By separation valve door 13 apertures on the connecting tube 12 of drain water piping 8 before controlling steam supply valve 10 or controlling the height row non-return flap of little machine steam line and steam turbine, control the pressure of cylinder pre-warm, thus control cylinder pre-warm speed;
Before the small turbine steam line 11 newly installing additional and the height of steam turbine row non-return flap, between drain water piping 8, the separation valve door 13 on connecting tube 12 should be able to be closed tightly, for the purpose of reliable, preferably install two isolating doors additional, one of them is power door operation, while preventing that unit from normally moving, affect the safe operation of little machine.
Claims (4)
1. a steam turbine pre-warming system, comprise the auxiliary vapour header of low pressure (9) and small turbine steam line (11), the auxiliary vapour header of described low pressure (9) is connected with small turbine by small turbine steam line (11), it is characterized in that: also comprise connecting tube (12) and separation valve door (13), described small turbine steam line (11) is communicated with the front drain water piping (8) of height row non-return flap of main steam turbine high-pressure cylinder (3) by connecting tube (12), and described separation valve door (13) is arranged on connecting tube (12).
2. steam turbine pre-warming system as claimed in claim 1, is characterized in that: described separation valve door (13) is two, and one of them is power door operation.
3. steam turbine pre-warming system as claimed in claim 1, is characterized in that: described small turbine steam line (11) is provided with steam supply valve (10).
4. steam turbine pre-warming system as claimed in claim 3, is characterized in that: described steam supply valve (10) is arranged on the small turbine steam line (11) being communicated with between the auxiliary vapour header of low pressure (9) and connecting tube (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320398050.0U CN203420745U (en) | 2013-07-05 | 2013-07-05 | Steam cylinder pre-heating system for turbines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320398050.0U CN203420745U (en) | 2013-07-05 | 2013-07-05 | Steam cylinder pre-heating system for turbines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203420745U true CN203420745U (en) | 2014-02-05 |
Family
ID=50019844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320398050.0U Expired - Fee Related CN203420745U (en) | 2013-07-05 | 2013-07-05 | Steam cylinder pre-heating system for turbines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203420745U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246245A (en) * | 2016-08-29 | 2016-12-21 | 华能国际电力开发公司铜川照金电厂 | A kind of method shortening unit starting time and energy conservation starting |
| CN106285796A (en) * | 2016-10-28 | 2017-01-04 | 山东电力建设第工程公司 | The auxiliary steam intermediate pressure cylinder start-up method of steam turbine |
| CN107687352A (en) * | 2017-07-03 | 2018-02-13 | 中国能源建设集团广东省电力设计研究院有限公司 | Combined cycle gas-steam turbine heating system |
| CN108868909A (en) * | 2018-06-29 | 2018-11-23 | 东方电气集团东方汽轮机有限公司 | A kind of two-shipper backheat small turbine start-up mode |
| CN110159360A (en) * | 2019-06-11 | 2019-08-23 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of Gas-steam Combined Cycle power plant shaft seal steam supply system and steam supplying method |
| CN112431637A (en) * | 2020-11-20 | 2021-03-02 | 沧州华润热电有限公司 | Auxiliary steam header system and power supply system |
| CN113123836A (en) * | 2019-12-30 | 2021-07-16 | 上海电气电站设备有限公司 | Back pressure steam turbine starting method |
| CN115263446A (en) * | 2022-08-02 | 2022-11-01 | 西安热工研究院有限公司 | Protection control system for cold-state pre-warming start of gas-steam combined cycle unit |
-
2013
- 2013-07-05 CN CN201320398050.0U patent/CN203420745U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246245A (en) * | 2016-08-29 | 2016-12-21 | 华能国际电力开发公司铜川照金电厂 | A kind of method shortening unit starting time and energy conservation starting |
| CN106285796A (en) * | 2016-10-28 | 2017-01-04 | 山东电力建设第工程公司 | The auxiliary steam intermediate pressure cylinder start-up method of steam turbine |
| CN107687352A (en) * | 2017-07-03 | 2018-02-13 | 中国能源建设集团广东省电力设计研究院有限公司 | Combined cycle gas-steam turbine heating system |
| CN108868909A (en) * | 2018-06-29 | 2018-11-23 | 东方电气集团东方汽轮机有限公司 | A kind of two-shipper backheat small turbine start-up mode |
| CN110159360A (en) * | 2019-06-11 | 2019-08-23 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of Gas-steam Combined Cycle power plant shaft seal steam supply system and steam supplying method |
| CN110159360B (en) * | 2019-06-11 | 2023-12-26 | 中国电力工程顾问集团西北电力设计院有限公司 | Shaft seal steam supply system and method for gas-steam combined cycle power plant |
| CN113123836A (en) * | 2019-12-30 | 2021-07-16 | 上海电气电站设备有限公司 | Back pressure steam turbine starting method |
| CN113123836B (en) * | 2019-12-30 | 2022-07-19 | 上海电气电站设备有限公司 | Back pressure steam turbine starting method |
| CN112431637A (en) * | 2020-11-20 | 2021-03-02 | 沧州华润热电有限公司 | Auxiliary steam header system and power supply system |
| CN115263446A (en) * | 2022-08-02 | 2022-11-01 | 西安热工研究院有限公司 | Protection control system for cold-state pre-warming start of gas-steam combined cycle unit |
| CN115263446B (en) * | 2022-08-02 | 2023-12-05 | 西安热工研究院有限公司 | Protection control system for cold state pre-heating start of gas-steam combined cycle unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20140705 |
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| EXPY | Termination of patent right or utility model |