CN108223029A - The temperature control system and its control method of a kind of discharge cylinder of steam turbine - Google Patents
The temperature control system and its control method of a kind of discharge cylinder of steam turbine Download PDFInfo
- Publication number
- CN108223029A CN108223029A CN201711431994.2A CN201711431994A CN108223029A CN 108223029 A CN108223029 A CN 108223029A CN 201711431994 A CN201711431994 A CN 201711431994A CN 108223029 A CN108223029 A CN 108223029A
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- Prior art keywords
- desuperheat
- water
- spray
- cylinder
- low pressure
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Classifications
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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
- F01D25/08—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
- 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
- F01D21/003—Arrangements for testing or measuring
-
- 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
Abstract
The invention discloses the temperature control systems and its control method of a kind of discharge cylinder of steam turbine.The temperature temperature control system is when steam turbine is in Ultra-low load operation, using condensation water as desuperheat water spray water source, the temperature measured by spray desuperheating master controller according to exhaust temperature detection device, the size of desuperheat water spray main inlet control valve aperture is adjusted, cooling water is sprayed into the realization of low pressure (LP) cylinder entrance channel by desuperheat water injector reduces the effect of exhaust temperature.Compare conventional low exhaust casing spray desuperheating system, the present invention realizes the closed-loop control of desuperheat water spray, and avoid the exhaust stage blade root water erosion because caused by desuperheat water spray is back to low pressure (LP) cylinder final stage of conventional water jet Desuperheating device, while low pressure exhaust hood temperature is reduced, reliability and safety of the steam turbine in underrun ensure that.
Description
Technical field
The present invention relates to steam turbine Ultra-low load operations, and in particular to a kind of temperature control system of discharge cylinder of steam turbine
And its control method.
Background technology
Steam turbine is a kind of using steam as working medium, and steam thermal energy is converted to the rotating machinery of mechanical work.And condensing-type vapour
The steam discharge overwhelming majority of turbine enters wet-steam region, and steam can be absorbed in the water droplet that low pressure (LP) cylinder Spontaneous Condensation generates due to rotor
Sound friction in high speed rotation and cylinder and the air blast frictional heat generated.Meanwhile for large-scale reheating embrittlement, with different capacity
It is required that work under different conditions with parameter request, steam turbine, when steam turbine off-design operating mode farther out when, i.e., when steam turbine exists
When rated speed underload or no-load run, temperature is held essentially constant after reheating, and turbine discharge is caused to enter overheated zone,
The ability for absorbing air blast heat is greatly reduced, and since steam specific heat is small, exhaust temperature increases rapidly.As shown in figure 3, low pressure (LP) cylinder is in volume
The expansion line for determining operating mode operation is A1C1, steam discharge enters wet-steam region；When unit is in underrun, intermediate pressure cylinder exhaust steam pressure
Decline, exhaust temperature is basically unchanged, and low pressure (LP) cylinder expansion line is A at this time2C2, steam enters overheated zone, exhaust temperature raising.Unit
The raising of exhaust casing temperature, jeopardizes unit safety operation at situations such as thermal deformation, owning consumption and unit vibration can be caused to deteriorate.For
This, which must take appropriate measures, reduces exhaust casing temperature.
Large-scale machine set is higher than setting in exhaust casing to spray desuperheating device is designed between condenser in exhaust temperature at present
Low pressure cylinder spray is put into during value.Water spray water source comes from the condensation water of low pressure (LP) cylinder steam discharge, is drawn from the outlet of condensate pump.Water spray
Although coming into operation for Desuperheating device can reduce the temperature of exhaust casing, since low pressure (LP) cylinder final stage works under little volume flow operating mode
When, root area is it is possible that generating negative degree of reaction and causing air-flow separation and reflux, flowback steam can be by exhaust casing mist cooling
Water droplet brings moving blades into and exports side high-speed impact with movable vane root suction surface, outlet side is made to generate water erosion, due to movable vane root
Edge subjects big static stress and dynamic stress, and the horizontal direction water erosion notch of trailing edge can germinate crack and extend rapidly；Secondly, steamer
The zigzag burr that machine exhaust stage blade water erosion is formed can cause stress concentration and reduce the area of leaf root section, influence leaf
The vibration characteristics of piece significantly reduces the intensity of blade, deteriorates the aeroperformance of leaf grating, and stage efficiency declines, meeting when serious
Cause the rupture failure of blade and cause unit that the serious accidents such as judder occur.Therefore, the water erosion and initiation of movable vane root
Crack poses a great threat the safety of unit.
Since traditional low pressure exhaust hood cooling spray system controllability is bad, desuperheat water spray reflux aggravation end is easily caused
The water erosion of grade blade influences the safety of unit operation, designs more preferably exhaust casing cooling means and system, unit is surpassed
The stable operation of underload and start and stop operating mode is of great significance.
Invention content
In view of the deficiencies of the prior art, the present invention proposes a kind of temperature control system and its controlling party of discharge cylinder of steam turbine
Method, it is intended to prevent low pressure (LP) cylinder exhaust stage blade root water while realizing steam turbine ultra-low load and start and stop operating mode cooling exhaust casing temperature
Erosion.
To solve prior art problem, the technical solution that the present invention takes is：
A kind of temperature control system of discharge cylinder of steam turbine, including intermediate pressure cylinder, low pressure (LP) cylinder, low pressure exhaust hood, condenser, condenser
Hot trap, condensation water pump group, desuperheat spray water control valve group, exhaust temperature detection device, spray desuperheating master controller, desuperheat water spray dress
It puts, low pressure (LP) cylinder entrance channel；The low pressure (LP) cylinder, low pressure exhaust hood, condenser and condenser hot trap are according to position from top to bottom
Arrangement, the exhaust temperature detection device are located at the casing wall of low pressure exhaust cylinder, and the condenser connects condensate pump by pipeline
Group, the condensation water pump group are formed in parallel including condensate pump A, condensate pump B and condensate pump C, the condensation water pump group
The other end connects desuperheat spray water control valve group, and the desuperheat spray water control valve group includes desuperheat water spray main inlet control valve, desuperheat water spray
Isolating valve and desuperheat water spray emergency spray shut-off valve, the desuperheat spray after isolating valve, desuperheat water spray main inlet control valve before main inlet control valve
Isolating valve is arranged in order arranged in series before isolating valve, desuperheat water spray main inlet control valve, desuperheat water spray main inlet control valve after water main inlet control valve,
It is in parallel with desuperheat water spray emergency spray shut-off valve again to form desuperheat spray water control valve group, it is isolated before the desuperheat water spray main inlet control valve
It is maintained a normally open during isolating valve normal operation after valve and desuperheat water spray main inlet control valve, isolating valve before the desuperheat water spray main inlet control valve
And isolating valve remains turned-off before desuperheat water spray main inlet control valve removes maintenance after desuperheat water spray main inlet control valve, the desuperheat water spray
The other end for adjusting valve group is connected by pipeline with desuperheat water injector, and the desuperheat water injector is located at low pressure (LP) cylinder entrance channel
Interior, the desuperheat sprays water main inlet control valve by spray desuperheating main controller controls.
It is that the desuperheat water injector is by 4 sprinkler compositions as improved.
It is further improved to be, in spiral inside 4 nozzles.
It is that strainer is equipped between the desuperheat spray water control valve group and desuperheat water injector as improved.
The control method of above-mentioned gas turbine exhaust gas cylinder temperature control system, in Ultra-low load operation, steam leads to low pressure (LP) cylinder
It crosses low pressure exhaust hood to enter in the main condensing zone of condenser, condensed condensation water is by condensate pump boosting as desuperheat water spray dress
The cooling to low pressure exhaust hood is realized at the sprinkling water source put, and exhaust temperature detection device detects the temperature of low pressure (LP) cylinder in real time, is led to
Cross the size of the water of the aperture regulation desuperheat water injector of spray desuperheating main controller controls desuperheat water spray main inlet control valve；When subtracting
When temperature water spray main inlet control valve breaks down, opening desuperheat water spray emergency spray shut-off valve realizes the drop to low pressure exhaust hood manually
Temperature.
It is that, when low pressure (LP) cylinder exhaust temperature increases and during close to 60 DEG C, desuperheat water spray main inlet control valve starts as improved
Action puts into spray desuperheating to low pressure (LP) cylinder, reduces low pressure (LP) cylinder temperature；When low pressure (LP) cylinder exhaust temperature is higher than 80 DEG C, desuperheat water spray
Main inlet control valve keeps standard-sized sheet, and when low pressure (LP) cylinder exhaust temperature declines and during close to 60 DEG C, desuperheat water spray main inlet control valve action is closed.
Advantageous effect：
Compared with prior art, the present invention has the following advantages：
1st, spray desuperheating system of the present invention effectively reduces discharge cylinder of steam turbine temperature, is put into running on the lower load, can consume vapour
What the air blast friction loss of end of turbine low pressure (LP) cylinder, reduces exhaust casing temperature, prevents from causing due to the abnormal raising of exhaust temperature
The total cubical expansion difference of steam turbine transfinite vibration etc., improve the safety and reliability that steam turbine is run in underload and start operating performance；
2nd, desuperheat water injector is mounted in low pressure (LP) cylinder entrance channel by spray desuperheating system of the present invention, is sprayed compared to cylinder after tradition
Water Desuperheating device avoids the low pressure (LP) cylinder last stage movable vane root water erosion caused by reflux of spraying water, and eliminates underload input water spray
Security risk existing for temperature reducing system；
3rd, the present invention detects the temperature of exhaust casing using exhaust temperature detection device in real time, then desuperheat is controlled to spray water by controller
The aperture of desuperheat water spray main inlet control valve in valve group is adjusted, adjusts the size of water spray, it is easy to operate, it disclosure satisfy that steam turbine is ultralow
Work requirements under load；
4th, spray desuperheating simple system of the present invention builds close loop control circuit, and without increasing low-temperature receiver, low cost newly, flexible adjustment is received
It is beneficial high, and unit depth peak modulation capacity and property safe and reliable to operation are improved, it is more obvious particularly with double reheat power generation sets effect.
Description of the drawings
Fig. 1 is a kind of structure diagram of the temperature control system of discharge cylinder of steam turbine of the present invention, wherein, it is pressed in 000-
Cylinder, 100- low pressure (LP) cylinders, 110- low pressure exhaust hoods, 120- low pressure (LP) cylinders entrance channel, the main condensing zone of 200- condensers, 211- cycles are cold
But water inlet hydroecium, 212- circulating cooling water outs hydroecium, 220- condensers hot trap, 301- condensate pump A, 302- condensate pumps
B, 303- condensate pumps C, 410- gland heaters, 420-#1 low-pressure heaters, 510- desuperheats water spray main inlet control valve, 521- subtract
Temperature water spray main inlet control valve before isolating valve, 522- desuperheats water spray main inlet control valve after isolating valve, 530- temperature water spray emergency trip valve,
600- turbine discharges temperature-detecting device, 700- strainers, 800- spray desuperheatings master controller, 900- nozzles；
Fig. 2 is a kind of control flow chart of the temperature control system of discharge cylinder of steam turbine of the present invention；
Fig. 3 is a kind of fundamental diagram of the temperature control system of discharge cylinder of steam turbine of the present invention.
Specific embodiment
The present invention is further described in detail below by specific embodiment.
Embodiment 1
A kind of temperature control system of discharge cylinder of steam turbine, including intermediate pressure cylinder 000, low pressure (LP) cylinder 100, low pressure exhaust hood 110, condensing
Device, condenser hot trap 220, condensation water pump group, heater group, desuperheat spray water control valve group, exhaust temperature detection device 600, spray
Water desuperheat master controller 800, desuperheat water injector and low pressure (LP) cylinder entrance channel 120；The low pressure (LP) cylinder 100, low pressure exhaust hood
110th, condenser and condenser hot trap 220 are arranged according to position from top to bottom, and the exhaust temperature detection device 600 is located at low
The casing wall of pressure cylinder 110, the condenser connect condensation water pump group by pipeline, and the condensation water pump group includes condensate pump
A301, condensate pump B302 and condensate pump C303 are formed in parallel, the condensation water pump group outlet other end connection heater group,
The other end connects desuperheat spray water control valve group, and the heater group is contacted by gland heater 410 and #1 low-pressure heaters 420
Form, the desuperheat spray water control valve group include desuperheat water spray main inlet control valve 510, desuperheat water spray main inlet control valve before isolating valve 521,
Isolating valve 522 and desuperheat water spray emergency spray shut-off valve 530 after desuperheat water spray main inlet control valve, the desuperheat is sprayed water after main inlet control valve
Isolating valve 521 is arranged in order arranged in series before isolating valve 522, desuperheat water spray main inlet control valve 510, desuperheat water spray main inlet control valve, then
It is in parallel with desuperheat water spray emergency spray shut-off valve 530 to form desuperheat spray water control valve group, the desuperheat spray water before main inlet control valve every
From being maintained a normally open during 522 normal operation of isolating valve after valve 521 and desuperheat water spray main inlet control valve, the desuperheat is sprayed water main inlet control valve
Isolating valve 522 is kept before desuperheat water spray main inlet control valve 510 removes maintenance after preceding isolating valve 521 and desuperheat water spray main inlet control valve
It closes, the other end of the desuperheat spray water control valve group is connected by pipeline with desuperheat water injector, the desuperheat water injector
In low pressure (LP) cylinder entrance channel 120, the desuperheat water spray main inlet control valve 510 controls unlatching by spray desuperheating master controller 800
It closes.The desuperheat water injector is made of 4 nozzles 900, and inside 4 nozzles 900 in the shape of a spiral, the desuperheat water spray is adjusted
Strainer 700 is equipped between valve group and desuperheat water injector, effectively removes impurities in water.
Embodiment 2
A kind of control method of the temperature control system of discharge cylinder of steam turbine, pattern as shown in Figure 2 carry out.Low pressure (LP) cylinder is ultralow
During load operation, steam is entered by low pressure exhaust hood in the main condensing zone of condenser of condenser, circulating cooling water inlet hydroecium
It intakes, the water outlet of circulating cooling water out hydroecium, steam becomes condensation water by the boosting of condensation water pump group as desuperheat spray after condensation
The sprinkling water source of water installations, realizes the cooling to low pressure exhaust hood, and exhaust temperature detection device detects the temperature of low pressure (LP) cylinder in real time
Degree, by spray desuperheating main controller controls desuperheat spray water main inlet control valve aperture realize desuperheat water injector water it is big
It is small；When desuperheat water spray main inlet control valve breaks down, desuperheat water spray emergency spray shut-off valve is opened manually and is realized to low pressure (LP) cylinder
Cooling.When low pressure (LP) cylinder exhaust temperature increases and during close to 60 DEG C, desuperheat water spray main inlet control valve starts to act, and is put into low pressure (LP) cylinder
Spray desuperheating reduces low pressure (LP) cylinder temperature；When low pressure (LP) cylinder exhaust temperature is higher than 80 DEG C, desuperheat water spray main inlet control valve keeps standard-sized sheet,
When low pressure (LP) cylinder exhaust temperature declines and during close to 60 DEG C, desuperheat water spray main inlet control valve action is closed.
Embodiment 3
A kind of fundamental diagram of the temperature control system of discharge cylinder of steam turbine, as shown in figure 3, entering including declared working condition low pressure (LP) cylinder
Mouth isobarp 0 , ultra-low load low pressure (LP) cylinder entrance isobarp 0 ＇ , low pressure (LP) cylinder steam discharge isobarp 2 , low pressure (LP) cylinder entrance before spray desuperheating
Thermoisopletht 0 , low pressure (LP) cylinder steam discharge thermoisopleth before declared working condition spray desuperheatingt 1 , low pressure (LP) cylinder entrance thermoisopleth after spray desuperheatingt 0 ＇ , surpass
Low pressure (LP) cylinder steam discharge thermoisopleth before underload spray desuperheatingt 1 ＇ , low pressure (LP) cylinder desired expansion line A before declared working condition spray desuperheating1B1, volume
Determine the practical expansion line A of low pressure (LP) cylinder before operating mode spray desuperheating1C1, low pressure (LP) cylinder desired expansion line A before ultra-low load spray desuperheating2B2, surpass
The practical expansion line A of low pressure (LP) cylinder before underload spray desuperheating2C2, low pressure (LP) cylinder desired expansion line A after ultra-low load spray desuperheating3B3, surpass
The practical expansion line A of low pressure (LP) cylinder after underload spray desuperheating3C3And saturated vaporline.
When steam turbine is when operating in low flow rate condition, steam in low pressure (LP) cylinder expansion work as shown in figure 3, low pressure (LP) cylinder enters
Mouth isobarp 0 ＇ With low pressure (LP) cylinder entrance thermoisopleth before spray desuperheatingt 0 Intersection point be low pressure (LP) cylinder entrance A before spray desuperheating2, it is preferable
Steam is by point A under situation2It is expanded to point B2, low pressure (LP) cylinder steam discharge isobar isp 2 , done since actual steam is expanded in turbine blade
There are irreversible losses during work(, and actual steam is by point A2It is expanded to point C2, as low pressure (LP) cylinder steam discharge isobar and desuperheat spray
The isothermal intersection point of low pressure (LP) cylinder steam discharge, exhaust temperature are before watert 1 ＇ 。
Since sound part air blast friction loss of the low pressure (LP) cylinder final stage in low flow rate condition increases so that low pressure (LP) cylinder steam discharge
Point is located on saturated vaporline, and steam discharge has been in superheated steam zone, can not consume the heat of air blast friction loss generation, make
The raised situation of low pressure (LP) cylinder exhaust temperature aggravates.The desuperheat water spray of condensation water is sprayed into low pressure (LP) cylinder inlet, due to steaming
Vapour specific heat is small, and low pressure (LP) cylinder inlet steam temperature can reduce rapidly, before spray desuperheatingt 0 It is down tot 0 ＇ , low pressure (LP) cylinder entrance by
Point A2Point A is moved downward to along low pressure (LP) cylinder entrance isobar3Low pressure (LP) cylinder entrance thermoisopleth after spray desuperheating is met at, ideally
Steam is by point A3It is expanded to point B3, back pressure isp 2 If desuperheat water spray is appropriate, spray desuperheating front stage group efficiency change is little, real
Border steam expansion line can be by A2C2A is moved to along low pressure (LP) cylinder entrance isobar and low pressure (LP) cylinder steam discharge isobar3C3, such as dotted line in Fig. 3
Shown, the exhaust point after spray desuperheating is by C2It is moved to C3, the exhaust temperature of low pressure (LP) cylinder byt 1 ＇ It is reduced tot 1 ＂ , exhaust point is located at full
With steamline hereinafter, low pressure (LP) cylinder final stage steam moisture increases, the moist steam latent heat of vaporization can absorb most of due to air blast friction
And the heat generated, there is the effect for reducing low pressure (LP) cylinder exhaust temperature.
Due to double reheat power generation sets low pressure (LP) cylinder inlet temperature higher, in off-design operating mode, steam discharge degree of superheat bigger, this
Invention is more obvious for double reheat power generation sets optimization, and effect of optimization is mainly shown as that low pressure (LP) cylinder inlet temperature reduces rapidly, low
Cylinder pressure exhaust steam moisture increases, and absorbs the enhancing of air blast friction loss heat ability, but it should keeping desuperheat water spray in rational model
It encloses, otherwise loses increase low pressure (LP) cylinder wet steam so that low pressure (LP) cylinder efficiency declines.
Conventional low exhaust casing spray desuperheating system is compared, the present invention realizes the closed-loop control of desuperheat water spray, and
The exhaust stage blade root water erosion because caused by desuperheat water spray is back to low pressure (LP) cylinder final stage of conventional water jet Desuperheating device is avoided, is being dropped
While low low pressure exhaust hood temperature, reliability and safety of the steam turbine in underrun ensure that.
In addition, the present invention is not limited to the above embodiment, as long as in without departing from the scope of the present invention, can take various
Mode implements the present invention.
Claims (6)
1. a kind of temperature control system of discharge cylinder of steam turbine, which is characterized in that including intermediate pressure cylinder, low pressure (LP) cylinder, low pressure exhaust hood,
Condenser, condenser hot trap, condensation water pump group, desuperheat spray water control valve group, exhaust temperature detection device, spray desuperheating main control
Device, desuperheat water injector, low pressure (LP) cylinder entrance channel；The low pressure (LP) cylinder, low pressure exhaust hood, condenser and condenser hot trap according to from
The position arrangement of top to bottm, the exhaust temperature detection device are located at the casing wall of low pressure exhaust cylinder, and the condenser passes through pipeline
Condensation water pump group is connected, the condensation water pump group is formed in parallel including condensate pump A, condensate pump B and condensate pump C, described
The other end connection desuperheat spray water control valve group of condensation water pump group, the desuperheat spray water control valve group include desuperheat water spray main regulation
Valve, desuperheat water spray main inlet control valve before isolating valve, desuperheat water spray main inlet control valve after isolating valve and desuperheat water spray emergency spray shut-off valve,
Isolating valve is arranged successively before isolating valve, desuperheat water spray main inlet control valve, desuperheat water spray main inlet control valve after the desuperheat water spray main inlet control valve
Row arranged in series, then composition desuperheat spray water control valve group in parallel with desuperheat water spray emergency spray shut-off valve, the desuperheat water spray master
It is maintained a normally open during isolating valve normal operation after isolating valve and desuperheat water spray main inlet control valve before regulating valve, the desuperheat is sprayed water homophony
Section valve before isolating valve and desuperheat water spray main inlet control valve after isolating valve desuperheat water spray main inlet control valve remove maintenance before remain turned-off,
The other end of the desuperheat spray water control valve group is connected by pipeline with desuperheat water injector, and the desuperheat water injector is located at low
In cylinder pressure entrance channel, the desuperheat sprays water main inlet control valve by spray desuperheating main controller controls.
A kind of 2. temperature control system of discharge cylinder of steam turbine according to claim 1, which is characterized in that the desuperheat spray
Water installations are by 4 sprinkler compositions.
A kind of 3. temperature control system of discharge cylinder of steam turbine according to claim 2, which is characterized in that 4 sprays
Head is internal in the shape of a spiral.
A kind of 4. temperature control system of discharge cylinder of steam turbine according to claim 1, which is characterized in that the desuperheat spray
Strainer is equipped between water regulating valve group and desuperheat water injector.
5. the control method based on gas turbine exhaust gas cylinder temperature control system described in claim 1, which is characterized in that low pressure (LP) cylinder
In Ultra-low load operation, steam is entered by low pressure exhaust hood in the main condensing zone of condenser, and condensed condensation water is by solidifying
Sprinkling water source of the pump boosting as desuperheat water injector is born water, realizes the cooling to low pressure exhaust hood, exhaust temperature detection dress
The temperature of detection low pressure (LP) cylinder in real time is put, the aperture regulation desuperheat for main inlet control valve of spraying water by spray desuperheating main controller controls desuperheat
The size of the water of water injector；When desuperheat water spray main inlet control valve breaks down, desuperheat water spray emergency spray is opened manually and is cut
Only valve realizes the cooling to low pressure exhaust hood.
6. a kind of control method of the temperature control system of discharge cylinder of steam turbine according to claim 5, which is characterized in that
When low pressure (LP) cylinder exhaust temperature increases and during close to 60 DEG C, desuperheat water spray main inlet control valve starts to act, and is put into low pressure (LP) cylinder entrance
Desuperheat is sprayed water, and reduces low pressure (LP) cylinder exhaust temperature；When low pressure (LP) cylinder exhaust temperature is higher than 80 DEG C, desuperheat water spray main inlet control valve keeps complete
It opens, when low pressure (LP) cylinder exhaust temperature declines and during close to 60 DEG C, desuperheat water spray main inlet control valve action is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711431994.2A CN108223029B (en) | 2017-12-26 | 2017-12-26 | Temperature control system and method for exhaust cylinder of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711431994.2A CN108223029B (en) | 2017-12-26 | 2017-12-26 | Temperature control system and method for exhaust cylinder of steam turbine |
Publications (2)
| Publication Number | Publication Date |
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| CN108223029A true CN108223029A (en) | 2018-06-29 |
| CN108223029B CN108223029B (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711431994.2A Expired - Fee Related CN108223029B (en) | 2017-12-26 | 2017-12-26 | Temperature control system and method for exhaust cylinder of steam turbine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736904A (en) * | 2019-03-08 | 2019-05-10 | 张黎明 | It is a kind of to eliminate low pressure (LP) cylinder swollen poor, deformation temperature control system and method |
| CN113027546A (en) * | 2021-03-29 | 2021-06-25 | 西安热工研究院有限公司 | Low-pressure cylinder zero-output cooling effect evaluation method suitable for wet-cooling 300MW unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109736904A (en) * | 2019-03-08 | 2019-05-10 | 张黎明 | It is a kind of to eliminate low pressure (LP) cylinder swollen poor, deformation temperature control system and method |
| CN109736904B (en) * | 2019-03-08 | 2024-02-27 | 张黎明 | Temperature control system and method for eliminating expansion difference and deformation of low-pressure cylinder |
| CN113027546A (en) * | 2021-03-29 | 2021-06-25 | 西安热工研究院有限公司 | Low-pressure cylinder zero-output cooling effect evaluation method suitable for wet-cooling 300MW unit |
| CN113027546B (en) * | 2021-03-29 | 2022-08-02 | 西安热工研究院有限公司 | Low-pressure cylinder zero-output cooling effect evaluation method suitable for wet-cooling 300MW unit |
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