CN106246245A - A kind of method shortening unit starting time and energy conservation starting - Google Patents
A kind of method shortening unit starting time and energy conservation starting Download PDFInfo
- Publication number
- CN106246245A CN106246245A CN201610761831.XA CN201610761831A CN106246245A CN 106246245 A CN106246245 A CN 106246245A CN 201610761831 A CN201610761831 A CN 201610761831A CN 106246245 A CN106246245 A CN 106246245A
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- Prior art keywords
- valve
- water
- steam
- unit
- pressure cylinder
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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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
-
- 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
- F01D17/10—Final actuators
- F01D17/105—Final actuators by passing part of the fluid
-
- 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
Abstract
The invention discloses a kind of method shortening unit starting time and energy conservation starting, from auxiliary vapour header Yin Jie mono-road jet chimney, jet chimney arranges auxiliary vapour to high pressure cylinder pre-warming steam supply hand-operated valve, steam supply electrodynamic valve, steam supply pneumatic control valve and auxiliary vapour to high pressure cylinder pre-warming steam supply non-return valve, after ignition of the boiler, in advance by auxiliary steam to steam turbine high-pressure cylinder pre-warm, shorten the unit starting time；Two-stage nitration extraction line increases little bypass, before and after being arranged in Electrically operated gate of drawing gas, draw gas bypass electrodynamic valve, two-stage nitration of two-stage nitration is set and draws gas bypass pneumatic control valve；Condensation water is connect from adjacent machine low-pressure heater outlet pass, two-way is set altogether and condenses water stainless steel pipes, two condense water electric gate valve, two condensation water pneumatic control valves, two condense water non-return valve, draw and be connected to the machine and condense water to after oxygen-eliminating device non-return valve, to water on the machine oxygen-eliminating device, substitute auxiliary steam heating oxygen-eliminating device, it is achieved the low-quality energy substitution high-quality energy.
Description
Technical field
The invention belongs to power plant for energy conservation consumption reduction field, relate to the startup system of a kind of unit, specifically one and be applied to contracting
Short unit starting time and the system of energy conservation starting.
Background technology
Whole nation capacity of installed generator quickly increased in recent years, power supply and demand situation totally rich, some areas surplus, thermoelectricity
Equipment utilization decimal declines further.Macroeconomy speedup is slow fall situation in totally presenting surely, and macro-forecast judges that electricity consumption needs
Ask the lowest.Thermal power plant will frequently be mediated, and Unit Commitment number of times will significantly increase.At present, domestic each greatly
Thermal power plant has taken effective scheme and the measure of many shortening startup time the most in the unit starting stage, and successfully realizes
Energy conservation starting, but be an eternal problem for shortening the project study of unit starting time and energy conservation starting.
Summary of the invention
It is an object of the invention to provide a kind of method shortening unit starting time and energy conservation starting, be effectively shortened and open
The dynamic time.
For reaching this purpose, the technical scheme is that a kind of method shortening unit starting time and energy conservation starting,
Including:
(1) during steam turbine cold start, when high pressure cylinder first order cylinder temperature is less than 150 DEG C, it is necessary to high pressure cylinder is carried out pre-
Warm, warm cylinder pressure 390～490KPa.Pre-warm operation is carried out after ignition of the boiler.Ignition of the boiler increasing temperature and pressure, opens high pressure turbine by
After, when the cold pressure again of pusher side rises to 0.5～0.7MPa, pusher side steam superheat is more than 28 DEG C, i.e. corresponding cold vapor (steam) temperature again
When rising to 180 DEG C～208 DEG C, now open the warmest choke valve of high pressure cylinder and stop valve carries out pre-warm to high pressure cylinder.From boiler point
Fire to meet high pressure cylinder pre-warming steam parameter need 2.5 hours, high pressure cylinder pre-warming according to steam turbine plant provide vexed cylinder curve and
All previous unit starting situation, needs 4.5 hours.I.e. from ignition of the boiler to steam turbine red switch, cold start needs 7 hours altogether.
The present invention proposes from auxiliary vapour header Yin Jie mono-road jet chimney, arranges auxiliary vapour to high pressure cylinder pre-warming on jet chimney
Steam supply hand-operated valve, steam supply electrodynamic valve, confession steam control valve and auxiliary vapour, to high pressure cylinder pre-warming steam supply non-return valve, after ignition of the boiler, carry
The front auxiliary steam that passes through, to steam turbine high-pressure cylinder pre-warm, shortens 2.5 hours unit starting time.
(2) from the point of view of current #2 high-pressure heater runs present situation, during unit starting, after opening high side, the cold liter that boosts again
Wen Hou, #2 high-pressure heater, from system, possesses the condition of putting into operation, hydrophobic from accident hydrophobic inflow steam exhaust device, improves #2
High-pressure heater exit water temperature, and then increase boiler feed temperature.But because the Electrically operated gate of drawing gas on two-stage nitration extraction line is complete
Driving fully closed valve, caliber is relatively thick, does not possess the function of low discharge steam regulation；If it addition, too much steam being introduced to #2 high pressure
Heater, then the steam flow that reheater passes through reduces, and dry combustion method likely occurs because steam flow is little in reheater.
The present invention proposes increasing little bypass on two-stage nitration extraction line, before and after being arranged in Electrically operated gate of drawing gas, arranges two-stage nitration
Draw gas bypass electrodynamic valve, and two-stage nitration draws gas bypass pneumatic control valve, improves boiler feed temperature, reduces giving during ignition of the boiler
Coal amount；
(3) the boiler water filling time is 3h, and it is 7h that ignition of the boiler to steam turbine possesses red switch condition, steam turbine medium-speed warming
4h, during this period, adjacent machine auxiliary steam (four take out or cold again) is all the time through during whole unit starting, and consumption is the biggest.
The present invention proposes low to add electronic valve outlet port from adjacent machine #5, condense water to oxygen-eliminating device non-return valve leading and connect a road and condense water
Pipeline, arranges the condensation water stainless steel pipes of two-way DN125 altogether, and two condense water electric gate valve, two dynamic regulations of condensation aqueous vapor
Valve, two condense water non-return valves, draw and are connected to the machine and condense water to after oxygen-eliminating device non-return valve, to water on the machine oxygen-eliminating device, substitute auxiliary
Steam is helped to heat oxygen-eliminating device, it is achieved the low-quality energy substitution high-quality energy.
Use that adjacent machine #5 is low to be added after outlet condenses water, namely squeezed four sections and drawn gas and go successively to steam turbine acting.Depend on
The heat balance diagram provided according to steam turbine factory, steam turbine leaving water temperature under 50%～100%THA operating mode is 118.4～140 DEG C,
The requirement of boiler water filling temperature can be met completely.
After this scheme of the invention is implemented, it is achieved that condense the purpose of water contact energy conservation starting as the occasion requires, greatly reduce auxiliary
The consumption of steam, it is achieved that low-quality steam substitutes high-quality steam.
Accompanying drawing explanation
Fig. 1 is that auxiliary steam is to high pressure cylinder pre-warming system schematic diagram.
Fig. 2 is that two-stage nitration extraction line increases small side road system schematic diagram.
Fig. 3 is that adjacent machine condensation water contact is supplied to oxygen-eliminating device system schematic.
Detailed description of the invention
Describing the present invention below in conjunction with accompanying drawing, the description of this part is only exemplary and explanatory, no
Should be regarded as the restriction to presently disclosed techniques content.
In FIG, after ignition of the boiler, it is not necessary to open high pressure cylinder and fall to warm up choke valve 1, the warmest stop valve 2 of high pressure cylinder, open
Auxiliary vapour is to high pressure cylinder pre-warming steam supply hand-operated valve 3, steam supply electrodynamic valve 4 and supplies steam control valve 5, and auxiliary vapour enters high pressure cylinder and carries out pre-warm.6
Be auxiliary vapour to high pressure cylinder pre-warming steam supply non-return valve, prevent the steam in high pressure cylinder from flowing backward to auxiliary vapour.High pressure cylinder cylinder temperature shifts to an earlier date pre-warm
After, after cylinder temperature rise up to possesses steam turbine red switch condition, close auxiliary vapour electronic to high pressure cylinder pre-warming steam supply hand-operated valve 3, steam supply
Valve 4 and confession steam control valve 5.
In fig. 2, during ignition of the boiler increasing temperature and pressure, after cold section of reheater pressure and temperature raise, close two-stage nitration and draw gas
Electrodynamic valve 8, opens two-stage nitration extraction check valve 7, and unlatching two-stage nitration draws gas and bypasses electrodynamic valve 9, and unlatching two-stage nitration draws gas and bypasses pneumatic regulation
Valve 10, put into operation #2 high-pressure heater, draws gas and enters hydrophobic being dredged to steam exhaust device by accident drain pipe of high-pressure heater generation.?
Steam turbine is grid-connected cut cylinder after, close draw gas bypass electrodynamic valve 9, two-stage nitration of two-stage nitration and draw gas bypass pneumatic control valve 10, #2 hyperbaric heating
Device puts into operation according to the step of bringing normally into operation.After this scheme of the invention is implemented, not having any impact to unit is properly functioning, #2 is high
Pressure heater puts into operation in advance, improves boiler feed temperature, can reduce the coal-supplying amount during ignition of the boiler.
In figure 3,11 condense water to oxygen-eliminating device for #1 unit supplies water non-return valve, and 12 condense water to oxygen-eliminating device confession for #2 unit
Water non-return valve.#1 unit operation, during #2 unit starting, by unlatching #1 unit condensation water to #2 unit water supply electrodynamic valve 13, opens
Open #1 unit condense water to #2 unit water supply pneumatic control valve 14 and non-return valve 15, by the condensation water that water temperature is 118.4～140 DEG C
Mend to #2 unit oxygen-eliminating device；#2 unit operation, during #1 unit starting, supplies water electronic by opening #2 unit condensation water to #1 unit
Valve 16, water temperature, to #1 unit water supply pneumatic control valve 17 and non-return valve 18, is 118.4～140 DEG C by unlatching #2 unit condensation water
Condensation water mend to #1 unit oxygen-eliminating device.
A kind of being applied to shortens unit starting time and the system of energy conservation starting, and unit single cold start can shorten startup
Time 2.5h, saves electricity 100,000 Kwh, saves 100 tons of coal of mark.
Above content is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this, every presses
The technological thought proposed according to the present invention, any change done on the basis of technical scheme, each fall within claims of the present invention
Protection domain within.
Claims (1)
1. the method shortening unit starting time and energy conservation starting, it is characterised in that: from auxiliary vapour header Yin Jie mono-road steam
Pipeline, arranges auxiliary vapour to high pressure cylinder pre-warming steam supply hand-operated valve (3), steam supply electrodynamic valve (4), confession steam control valve on jet chimney
And auxiliary vapour is to high pressure cylinder pre-warming steam supply non-return valve (6) (5), after ignition of the boiler, in advance by auxiliary steam to turbine high-pressure
Cylinder pre-warm, shortens the unit starting time；
Two-stage nitration extraction line increases little bypass, before and after being arranged in Electrically operated gate of drawing gas, two-stage nitration is set and draws gas bypass electrodynamic valve
(9), two-stage nitration draws gas and bypasses pneumatic control valve (10), improves boiler feed temperature, reduces the coal-supplying amount during ignition of the boiler；
Connecing condensation water from adjacent machine low-pressure heater outlet pass, arrange two-way altogether and condense water stainless steel pipes, #1 unit condenses
Water is to #2 unit water supply electrodynamic valve (13), #1 unit condensation water to #2 unit water supply pneumatic control valve (14) and non-return valve (15), #
2 units condense water to #1 unit water supply electrodynamic valve (16), and #2 unit condenses water to #1 unit water supply pneumatic control valve (17) and inverse
Only valve (18), draws and is connected to the machine and condenses water to after oxygen-eliminating device non-return valve, to water on the machine oxygen-eliminating device, substitute auxiliary steam and add evanescence of heat
Oxygen device, it is achieved the low-quality energy substitution high-quality energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610761831.XA CN106246245A (en) | 2016-08-29 | 2016-08-29 | A kind of method shortening unit starting time and energy conservation starting |
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| CN201610761831.XA CN106246245A (en) | 2016-08-29 | 2016-08-29 | A kind of method shortening unit starting time and energy conservation starting |
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| CN106246245A true CN106246245A (en) | 2016-12-21 |
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| CN201610761831.XA Pending CN106246245A (en) | 2016-08-29 | 2016-08-29 | A kind of method shortening unit starting time and energy conservation starting |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060922A (en) * | 2017-04-28 | 2017-08-18 | 申能股份有限公司 | The auxiliary vapour system and its steam supplying method in thermal power plant |
| CN107150055A (en) * | 2017-07-04 | 2017-09-12 | 山东中实易通集团有限公司 | The auxiliary vapour purging system and method not restricted before a kind of unit starting by steam |
| CN107202317A (en) * | 2017-06-06 | 2017-09-26 | 华能国际电力股份有限公司长兴电厂 | Pollutant zero surpasses the control method of row during a kind of unit starting |
| CN108087863A (en) * | 2018-02-08 | 2018-05-29 | 西安西热节能技术有限公司 | A kind of neighbour's machine condensation water interacted system |
| CN110131003A (en) * | 2019-06-10 | 2019-08-16 | 西安热工研究院有限公司 | A kind of system and method for high temperature gas cooled reactor nuclear power unit secondary circuit start and stop |
| 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 |
| CN110701114A (en) * | 2019-10-24 | 2020-01-17 | 中国能源建设集团广东省电力设计研究院有限公司 | Furnace water circulating pump starting system and control method |
| CN111706406A (en) * | 2020-06-15 | 2020-09-25 | 华能罗源发电有限责任公司 | Quick medium speed warm-up control system |
| CN112524596A (en) * | 2020-11-18 | 2021-03-19 | 神华（福州）罗源湾港电有限公司 | Auxiliary heating system of steam extraction regenerative system of steam turbine and control method |
| CN112761738A (en) * | 2021-02-08 | 2021-05-07 | 浙江浙能技术研究院有限公司 | Novel method for judging tightness of steam extraction check valve of steam turbine |
| CN112814752A (en) * | 2021-01-08 | 2021-05-18 | 西安热工研究院有限公司 | Rapid starting system and method for thermal generator set in medium pressure cylinder starting mode |
| CN113623026A (en) * | 2021-09-07 | 2021-11-09 | 济南奔腾时代电力科技有限公司 | Steam turbine high-pressure cylinder warming and cylinder switching control optimization method |
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| JPS56106008A (en) * | 1980-01-25 | 1981-08-24 | Toshiba Corp | Controlling device for boiler feed water pump driving turbine |
| CN202209668U (en) * | 2011-08-17 | 2012-05-02 | 山东源和电站工程技术有限公司 | Steam supply system of auxiliary steam source of large thermal generator set |
| US20140373541A1 (en) * | 2013-04-05 | 2014-12-25 | Fuji Electric Co., Ltd. | Method and apparatus for safety operation of extraction steam turbine utilized for power generation plant |
| CN203420745U (en) * | 2013-07-05 | 2014-02-05 | 大唐洛阳首阳山发电有限责任公司 | Steam cylinder pre-heating system for turbines |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060922A (en) * | 2017-04-28 | 2017-08-18 | 申能股份有限公司 | The auxiliary vapour system and its steam supplying method in thermal power plant |
| CN107060922B (en) * | 2017-04-28 | 2023-07-25 | 申能股份有限公司 | Auxiliary steam system of thermal power plant and steam supply method thereof |
| CN107202317A (en) * | 2017-06-06 | 2017-09-26 | 华能国际电力股份有限公司长兴电厂 | Pollutant zero surpasses the control method of row during a kind of unit starting |
| CN107150055A (en) * | 2017-07-04 | 2017-09-12 | 山东中实易通集团有限公司 | The auxiliary vapour purging system and method not restricted before a kind of unit starting by steam |
| CN108087863A (en) * | 2018-02-08 | 2018-05-29 | 西安西热节能技术有限公司 | A kind of neighbour's machine condensation water interacted system |
| CN110131003A (en) * | 2019-06-10 | 2019-08-16 | 西安热工研究院有限公司 | A kind of system and method for high temperature gas cooled reactor nuclear power unit secondary circuit start and stop |
| CN110131003B (en) * | 2019-06-10 | 2023-06-27 | 西安热工研究院有限公司 | System and method for starting and stopping two loops of high-temperature gas cooled reactor nuclear power unit |
| 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 |
| CN110701114A (en) * | 2019-10-24 | 2020-01-17 | 中国能源建设集团广东省电力设计研究院有限公司 | Furnace water circulating pump starting system and control method |
| CN111706406B (en) * | 2020-06-15 | 2022-12-06 | 华能罗源发电有限责任公司 | Quick intermediate speed warm-up control system |
| CN111706406A (en) * | 2020-06-15 | 2020-09-25 | 华能罗源发电有限责任公司 | Quick medium speed warm-up control system |
| CN112524596A (en) * | 2020-11-18 | 2021-03-19 | 神华（福州）罗源湾港电有限公司 | Auxiliary heating system of steam extraction regenerative system of steam turbine and control method |
| CN112814752A (en) * | 2021-01-08 | 2021-05-18 | 西安热工研究院有限公司 | Rapid starting system and method for thermal generator set in medium pressure cylinder starting mode |
| CN112761738B (en) * | 2021-02-08 | 2022-12-23 | 浙江浙能技术研究院有限公司 | Novel method for judging tightness of steam extraction check valve of steam turbine |
| CN112761738A (en) * | 2021-02-08 | 2021-05-07 | 浙江浙能技术研究院有限公司 | Novel method for judging tightness of steam extraction check valve of steam turbine |
| CN113623026A (en) * | 2021-09-07 | 2021-11-09 | 济南奔腾时代电力科技有限公司 | Steam turbine high-pressure cylinder warming and cylinder switching control optimization method |
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