CN105736080B - A kind of new thermal power plant's small turbine axle envelope steam bleeding system - Google Patents
A kind of new thermal power plant's small turbine axle envelope steam bleeding system Download PDFInfo
- Publication number
- CN105736080B CN105736080B CN201610276620.7A CN201610276620A CN105736080B CN 105736080 B CN105736080 B CN 105736080B CN 201610276620 A CN201610276620 A CN 201610276620A CN 105736080 B CN105736080 B CN 105736080B
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- China
- Prior art keywords
- small turbine
- steam
- vapour
- thermal power
- vapor extractor
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- 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
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K19/00—Regenerating or otherwise treating steam exhausted from steam engine plant
- F01K19/02—Regenerating by compression
- F01K19/08—Regenerating by compression compression done by injection apparatus, jet blower, or the like
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- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
- F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
- F01D17/24—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical electrical
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- 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
- F01D25/30—Exhaust heads, chambers, or the like
- F01D25/305—Exhaust heads, chambers, or the like with fluid, e.g. liquid injection
Abstract
The present invention is a kind of new thermal power plant's small turbine axle envelope steam bleeding system of thermal power generation station-service, including small turbine, draw on the steam inlet pipe road of small turbine all the way steam through the laggard incident vapour vapor extractor of electric control valve and decompression venting valve, bypass stop valve is provided with electric control valve, small turbine shaft seal leakage steam piping penetrates the outlet conduit of vapour vapor extractor on the blow-off line after stop valve II is linked into small turbine check-valves II through the laggard incident vapour vapor extractor of check-valves I and stop valve I.The present invention draws steam all the way from small turbine steam inlet pipe road and passes through the laggard incident vapour vapor extractor of decompression venting valve, as the work vapour source for penetrating vapour vapor extractor, so as to form negative pressure at gland packing leakage main pipe, extract the gland packing leakage of small turbine out, the heat and working medium of gland packing leakage have effectively been reclaimed, compared to existing axle envelope heating system, has reduced thermal power plant's small turbine transformation initial cost and the loss of operating cooling water, simple system, it is reliable.
Description
Technical field
The present invention is a kind of new thermal power plant's small turbine axle envelope steam bleeding system of thermal power generation station-service.
Background technology
At present, the problem of fired power generating unit is low in the prevalence of annual utilization hours, and unit load rate declines, small turbine exists
Application in large-size thermal power plant heat supply transformation is more and more common.For small turbine gland packing leakage problem, current routine
Way is to set gland heater equipment, ensures gland heater certain vacuum come suction shaft using axle plus blower fan or vapor extractor
Gland leak-off, then draw cooling water cooling gland packing leakage all the way and form hydrophobic discharge.In actual moving process, what axle envelope cooling water absorbed
This portion of energy can not be recycled utilization, can only drain into cooling tower forebay or trench, cause small turbine leakage vapour working medium and heat
The waste of amount.Another setting gland heater investment is larger, and gland heater is configured with cooling water system, system complex, running cost
With higher.
The content of the invention
The technical problem to be solved in the present invention is：Solve method system complexity, the operation of small turbine gland packing leakage at present
It is costly, to solve the above problems, providing a kind of new thermal power plant's small turbine axle envelope steam bleeding system.
The purpose of the present invention is realized in the following manner：
A kind of new thermal power plant's small turbine axle envelope steam bleeding system, including small turbine, in the steam inlet pipe road of small turbine
On draw steam all the way and through the laggard incident vapour vapor extractor of electric control valve and decompression venting valve, bypass be provided with electric control valve and is cut
Only valve, small turbine shaft seal leakage steam piping penetrate the outlet of vapour vapor extractor through the laggard incident vapour vapor extractor of check-valves I and stop valve I
Pipeline is on the blow-off line after stop valve II is linked into small turbine check-valves II.
Penetrate on the outlet conduit of vapour vapor extractor and be provided with pressure sensor, the pressure transmission that pressure sensor measures to PLC
Controling adjustment device, PLC controling adjustment devices are according to the action of the Stress control electric control valve of survey.
Relative to prior art, the present invention draws steam all the way from small turbine steam inlet pipe road and entered after decompression venting valve
Vapour vapor extractor is penetrated, as the work vapour source for penetrating vapour vapor extractor, so as to form negative pressure at gland packing leakage main pipe, extracts small turbine out
Gland packing leakage, effectively reclaimed the heat and working medium of gland packing leakage, compared to existing axle envelope heating system, reduced thermal power plant
Small turbine transforms initial cost and the loss of operating cooling water, simple system are reliable.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Wherein, 1 is small turbine；2 be to penetrate vapour vapor extractor；3 be small turbine steam inlet pipe road；4 be jet chimney；5 be other
Road stop valve；6 be decompression venting valve；7 be axle envelope；8 be small turbine shaft seal leakage steam piping；9 be check-valves I；10 are off valve
Ⅰ；11 are off valve II；12 be outlet conduit；13 be check-valves II；14 be blow-off line；15 be pressure sensor；16 be PLC
Controling adjustment device；17 be electric control valve.
Embodiment
As shown in figure 1, a kind of new thermal power plant's small turbine axle envelope steam bleeding system, mainly include small turbine 1, penetrate vapour and take out
Vapour device 2, decompression venting valve 6, PLC controling adjustment devices 16, electric control valve 17 etc..Draw all the way from small turbine steam inlet pipe road 3
Jet chimney 4 is through electric control valve 17（Bypass stop valve 5 is provided with electric control valve 17）With 6 laggard incidence of decompression venting valve
Vapour vapor extractor 2, the steam of jet chimney 4 is as the leakage vapour for penetrating the work vapour source suction axle envelope 7 of vapour vapor extractor 2.Small turbine axle envelope
Steam pipe road 8 is leaked through the laggard incident vapour vapor extractor 2 of check-valves I 9 and stop valve I 10.The leakage of steam and axle envelope 7 in jet chimney 4
Steam discharge of the vapour in steam discharge after being sufficiently mixed in penetrating vapour vapor extractor 2 after stop valve II 11 is linked into the check-valves II 13 of small turbine 1
Pipeline 14.Penetrate the outlet conduit 12 of vapour vapor extractor 2 and connect pressure sensor 15, pressure signal transmission into PLC controling adjustment devices 16,
The aperture of the signal control electric control valve 17 accordingly of PLC controling adjustment devices 16, the flow of inlet steam pipeline 4 is controlled with this,
Satisfaction penetrates the outlet pressure requirement of vapour vapor extractor 2.
Draw high parameter steam 4 all the way from small turbine steam inlet pipe road 3 and pass through the laggard incident vapour vapor extractor 2 of decompression venting valve 6,
As work vapour source, sprayed at a high speed penetrating vapour vapor extractor 2, by reasonable selection and the flow of adjustment work steam 4 in gland packing leakage
4 ~ 12kpa negative pressure is formed at main pipe, extracts the leakage vapour of small turbine axle envelope 7 out.Penetrating vapour vapor extractor 2 mainly has main jet, mixes
Close room and diffuser pipe three parts form, the leakage vapour of working steam 4 and axle envelope 7, by diffuser pipe, makes outlet after mixing chamber mixing
Obtain the steam of certain pressure.Mixed vapour is discharged into small steam turbine exhaust steam pipeline 14 after penetrating vapour vapor extractor 2（Check-valves II 13
Afterwards）.
The current initial steam pressure of 300 ~ 600MW units heat supply small turbine 1 is generally 0.6 ~ 3.9MPa.a, temperature 250 ~ 350
DEG C, the steam 4 for penetrating the outlet of the diffuser pipe of vapour vapor extractor 2 is controlled in slightly above small vapour according to actual small steam turbine exhaust steam pressure type selecting
The exhaust steam pressure of turbine 1.In actual motion leakage vapour of the unstable vacuum to suction axle envelope 7 is formed because initial steam pressure fluctuates compared with conference
It is unfavorable, therefore decompression venting valve 6 need to be set, it is stable to penetrate pressure at the working steam nozzle of vapour vapor extractor 2.Drawn gas by the vapour of penetrating measured
Pressure at the outlet conduit 12 of device 2, small turbine 1 can be higher than to reach by the flow of 17 adjustment work steam of electric control valve 4
Exhaust steam pressure, smoothly it is discharged into the blow-off line of small turbine 1.
Because being limited by shaft gland steam leakage, the present invention drags large-scale subsidiary engine small turbine axle envelope only for thermal power plant
Steam bleeding system, such as circulation pump of heat-supply network steam turbine, feed pump turbine, air-introduced machine steam turbine.
Claims (2)
1. a kind of new thermal power plant's small turbine axle envelope steam bleeding system, including small turbine, it is characterised in that：In small turbine
Draw steam all the way on steam inlet pipe road through the laggard incident vapour vapor extractor of electric control valve and decompression venting valve, to set at electric control valve
There is bypass stop valve, small turbine shaft seal leakage steam piping is penetrated vapour and drawn gas through the laggard incident vapour vapor extractor of check-valves I and stop valve I
The outlet conduit of device is on the blow-off line after stop valve II is linked into small turbine check-valves II.
A kind of 2. new thermal power plant's small turbine axle envelope steam bleeding system according to claim 1, it is characterised in that：Vapour is penetrated to take out
It is provided with pressure sensor on the outlet conduit of vapour device, the pressure transmission that pressure sensor measures to PLC controling adjustment devices,
PLC controling adjustment devices are according to the action of the Stress control electric control valve of survey.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610276620.7A CN105736080B (en) | 2016-04-29 | 2016-04-29 | A kind of new thermal power plant's small turbine axle envelope steam bleeding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610276620.7A CN105736080B (en) | 2016-04-29 | 2016-04-29 | A kind of new thermal power plant's small turbine axle envelope steam bleeding system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105736080A CN105736080A (en) | 2016-07-06 |
| CN105736080B true CN105736080B (en) | 2017-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610276620.7A Active CN105736080B (en) | 2016-04-29 | 2016-04-29 | A kind of new thermal power plant's small turbine axle envelope steam bleeding system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108104892A (en) * | 2017-12-30 | 2018-06-01 | 荣成市固废综合处理与应用产业园有限公司 | Turbo-generator Set gland-packing leakage system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205714311U (en) * | 2016-04-29 | 2016-11-23 | 华电郑州机械设计研究院有限公司 | A kind of Novel fire power plant small turbine axle envelope steam bleeding system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0326806A (en) * | 1989-06-23 | 1991-02-05 | Toshiba Corp | Vacuum maintaining system utilizing auxiliary steam |
| JP3879213B2 (en) * | 1997-12-19 | 2007-02-07 | 富士電機システムズ株式会社 | Steam turbine ground leakage steam recovery system |
| US8240153B2 (en) * | 2008-05-14 | 2012-08-14 | General Electric Company | Method and system for controlling a set point for extracting air from a compressor to provide turbine cooling air in a gas turbine |
| CN202991153U (en) * | 2012-12-24 | 2013-06-12 | 昆明醋酸纤维有限公司 | Device for extracting rear steam sealing leakage of back pressure turbine |
| RU2528452C2 (en) * | 2013-01-10 | 2014-09-20 | Закрытое акционерное общество Научно-производственное предприятие "Машпром" (ЗАО НПП "Машпром") | Method of heating at steam heat exchangers and plant to this end |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205714311U (en) * | 2016-04-29 | 2016-11-23 | 华电郑州机械设计研究院有限公司 | A kind of Novel fire power plant small turbine axle envelope steam bleeding system |
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| CN105736080A (en) | 2016-07-06 |
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