CN108952842A - Method for rapid cooling after a kind of halt turbines - Google Patents
Method for rapid cooling after a kind of halt turbines Download PDFInfo
- Publication number
- CN108952842A CN108952842A CN201710367814.2A CN201710367814A CN108952842A CN 108952842 A CN108952842 A CN 108952842A CN 201710367814 A CN201710367814 A CN 201710367814A CN 108952842 A CN108952842 A CN 108952842A
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- CN
- China
- Prior art keywords
- steam turbine
- cylinder
- boiler
- cooling
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses the method for rapid cooling after a kind of halt turbines, solve the problems such as existing method needs cooling time long, causes maintenance duration to spin out, affect the availability of unit.It is characterized in that vacuum system remains operational in cooling procedure; outside air is entered by boiler startup flash vessel; air is heated to certain temperature by boiler superheater and boiler reheater; form the gas for being rapidly cooled after halt turbines; then pass through the high, medium and low cylinder pressure of steam turbine; high-temperature component in steam turbine is cooled down, air after cooling is discharged into condenser.The present invention is safe and reliable, operates convenient for grasping, and without carrying out scrap build, and does not influence Steam Turbine safety, shortens out the cylinder waiting time, realizes the rapid cooling after shutting down.
Description
Technical field
The present invention relates to technical field of power generation, and in particular to method for rapid cooling after a kind of halt turbines.
Background technique
METHOD FOR TURBOGENERATOR SET is after maintenance outage in natural cooling process, since cylinder radiating condition is poor, accumulation of heat
Amount is big, and cylinder wall temperature decline is slower, needs longer cooling time, maintenance duration is caused to spin out, affect the available of unit
Rate.Currently, domestic some Steam Turbines do not configure fast cooling device, which puts into larger and difficult arrangement, therefore
How to be quickly cooled down using existing equipment realization system, is power plant's problem in the urgent need to address.
Summary of the invention
The purpose of the present invention is to provide it is a kind of it is economical and practical, safe and reliable, cooling effect is ideal, convenient for controlling operation
Method for rapid cooling after halt turbines.
The technical solution adopted by the present invention is that: method for rapid cooling after a kind of halt turbines, it is characterised in that including with
Lower step:
1, after boiler shutdown, when steam turbine is high, intermediate pressure cylinder Wen Jun drops to 280 DEG C or less, investment steam turbine cycle water system is coagulated
Bear water system, axle envelope vapour system and vacuum system operation, control condenser vacuum to -40~-30kPa.
2, unit high pressure turbine by and low voltage bypass are opened, aperture controls within 5%, and dehumidifier air is closed after ten minutes.
3, steam turbine hangs lock, opens turbine high-pressure main inlet throttle-stop valve and reheat stop interceptor valve, suitably unlatching high-pressure governing valve, closes
The high cylinder steam discharge ventilation valve of steam turbine opens high pressure cylinder steam discharge non-return flap.
4, open boiler water tank be exported to boiler startup flash vessel import hand stop valve and boiler startup flash vessel into
Mouth electric check valve, enters air from boiler startup flash vessel, is added by entering in superheater after water tank, steam-water separator
Heat is discharged into boiler reheater after cooling down to high pressure cylinder and heats, enter back into intermediate pressure cylinder subsequently into steam turbine high-pressure cylinder
It is interior, the condenser of low pressure (LP) cylinder lower part is discharged into after cooling down to intermediate pressure cylinder, vacuum system remains operational in cooling procedure.
5, steam turbine height, intermediate pressure cylinder Wen Jun drop to 150 DEG C hereinafter, reaching out cylinder condition.
As shown from the above technical solution, the beneficial effects of the present invention are:
1, steam turbine is cooled down using boiler afterheat heating air, shifts to an earlier date 6 days or so than steam turbine natural cooling and reaches
To cylinder condition is opened, the cylinder waiting time is shortened out, shortens maintenance duration, the rapid cooling after shutting down is realized, unit is allowed to shift to an earlier date
It generates electricity by way of merging two or more grid systems.
2, the present invention is safe and reliable, operates convenient for grasping, and without carrying out scrap build, and does not influence Steam Turbine safety
Property.
Specific embodiment
The present invention is described further below.
Method for rapid cooling after a kind of halt turbines, it is characterised in that the following steps are included:
1, after boiler shutdown, when steam turbine is high, intermediate pressure cylinder Wen Jun drops to 280 DEG C or less, investment steam turbine cycle water system is coagulated
Bear water system, axle envelope vapour system and vacuum system operation, control condenser vacuum to -40~-30kPa.
2, unit high pressure turbine by and low voltage bypass are opened, aperture controls within 5%, and dehumidifier air is closed after ten minutes.
3, steam turbine hangs lock, opens turbine high-pressure main inlet throttle-stop valve and reheat stop interceptor valve, suitably unlatching high-pressure governing valve, closes
The high cylinder steam discharge ventilation valve of steam turbine opens high pressure cylinder steam discharge non-return flap.
4, open boiler water tank be exported to boiler startup flash vessel import hand stop valve and boiler startup flash vessel into
Mouth electric check valve, enters outside air from boiler startup flash vessel, by entering superheater after water tank, steam-water separator
Interior heating is discharged into boiler reheater after cooling down to high pressure cylinder and heats subsequently into steam turbine high-pressure cylinder, enters back into
In cylinder pressure, the condenser of low pressure (LP) cylinder lower part is discharged into after cooling down to intermediate pressure cylinder, vacuum system remains operational in cooling procedure.
5, steam turbine height, intermediate pressure cylinder Wen Jun drop to 150 DEG C hereinafter, reaching out cylinder condition.
Claims (5)
1. method for rapid cooling after a kind of halt turbines, it is characterised in that the following steps are included:
(1) after boiler shutdown, when steam turbine is high, intermediate pressure cylinder Wen Jun drops to 280 DEG C or less, investment steam turbine cycle water system,
Condensate system, axle envelope vapour system and vacuum system operation, control condenser vacuum to -40~-30kPa.
Unit high pressure turbine by and low voltage bypass 2.(2) are opened, aperture controls within 5%, and dehumidifier air is closed after ten minutes.
3.(3) steam turbine hangs lock, opens turbine high-pressure main inlet throttle-stop valve and reheat stop interceptor valve, suitably unlatching high-pressure governing valve, closes
The high cylinder steam discharge ventilation valve of steam turbine opens high pressure cylinder steam discharge non-return flap.
It 4.(4) opens boiler water tank and is exported to boiler startup flash vessel import hand stop valve and boiler startup flash vessel import
Electric check valve enters outside air from boiler startup flash vessel, by entering in superheater after water tank, steam-water separator
Heating, subsequently into steam turbine high-pressure cylinder, is discharged into boiler reheater after cooling down to high pressure cylinder and heats, enter back into middle pressure
In cylinder, the condenser of low pressure (LP) cylinder lower part is discharged into after cooling down to intermediate pressure cylinder, vacuum system remains operational in cooling procedure.
5.(5) steam turbine height, intermediate pressure cylinder Wen Jun drop to 150 DEG C hereinafter, reaching out cylinder condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367814.2A CN108952842A (en) | 2017-05-23 | 2017-05-23 | Method for rapid cooling after a kind of halt turbines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710367814.2A CN108952842A (en) | 2017-05-23 | 2017-05-23 | Method for rapid cooling after a kind of halt turbines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108952842A true CN108952842A (en) | 2018-12-07 |
Family
ID=64461779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710367814.2A Pending CN108952842A (en) | 2017-05-23 | 2017-05-23 | Method for rapid cooling after a kind of halt turbines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108952842A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360580A (en) * | 2020-10-10 | 2021-02-12 | 内蒙古锦联铝材有限公司 | Rapid cooling mode for steam turbine after shutdown by using waste heat of boiler |
| CN113153456A (en) * | 2021-04-16 | 2021-07-23 | 西安交通大学 | Steam turbine stationary blade heating and dehumidifying test system |
| CN114607477A (en) * | 2022-04-01 | 2022-06-10 | 邹平滨能能源科技有限公司 | Rapid cooling method for steam turbine of unit system unit |
-
2017
- 2017-05-23 CN CN201710367814.2A patent/CN108952842A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112360580A (en) * | 2020-10-10 | 2021-02-12 | 内蒙古锦联铝材有限公司 | Rapid cooling mode for steam turbine after shutdown by using waste heat of boiler |
| CN113153456A (en) * | 2021-04-16 | 2021-07-23 | 西安交通大学 | Steam turbine stationary blade heating and dehumidifying test system |
| CN114607477A (en) * | 2022-04-01 | 2022-06-10 | 邹平滨能能源科技有限公司 | Rapid cooling method for steam turbine of unit system unit |
| CN114607477B (en) * | 2022-04-01 | 2023-08-01 | 邹平滨能能源科技有限公司 | Rapid cooling method for unit turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181207 |
|
| WD01 | Invention patent application deemed withdrawn after publication |