CN109630222A - A kind of method and system improving the coal-fired thermal power generation unit thermal efficiency - Google Patents
A kind of method and system improving the coal-fired thermal power generation unit thermal efficiency Download PDFInfo
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- CN109630222A CN109630222A CN201811366752.4A CN201811366752A CN109630222A CN 109630222 A CN109630222 A CN 109630222A CN 201811366752 A CN201811366752 A CN 201811366752A CN 109630222 A CN109630222 A CN 109630222A
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- 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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- 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
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- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/38—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of turbine type
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
A kind of method and system improving the coal-fired thermal power generation unit thermal efficiency, belong to clean and effective coal-fired power generator set field, it is characterised in that: including steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine high-pressure regulating valve, boiler superheater, boiler reheater, high-pressure extraction steam extraction and feed-water heater；Transformation is improved efficiency by Turbine Flow Path, the adjustable high-pressure extraction steam extraction of level-one and feed-water heater are added on Turbo-generator Set high pressure cylinder, increase turbine LP rotors power regulation ability by the way of putting into and cutting off this grade of heater, to optimize Control Stage of Steam Turbine and high pressure cylinder circulation area, it realizes that Turbo-generator Set heat consumption rate checks and accepts operating condition and steam turbine declared working condition is turbine high-pressure regulating valve standard-sized sheet operating condition maximum throttle flow, improves the thermal efficiency of Turbo-generator Set.Unit depth peak modulation capacity and primary frequency modulation grade AGC governing response ability are enhanced to improve the backheat economy of unit by improving boiler feed temperature.
Description
Technical field
The invention belongs to clean and effective coal-fired power generator set field more particularly to a kind of coal-fired thermal power generation unit heat of raising
The method and system of efficiency.
Background technique
In the case where the mankind cope with Global climate change overall background jointly, energy Transformation Strategy is formulated in countries in the world one after another, proposes
Higher energetic efficiency objectives formulate more positive low-carbon policy, push Renewable Energy Development, increase reduction of greenhouse gas discharge power
Degree.
Increased by China's capacity of installed generator over the past two years and generated energy tendency can be seen that China's power supply and demand situation
Overall loose, generator installation cleans that trend is obvious, and non-fossil energy generated energy amplification is more than coal electricity, and accounting greatly improves.It presses
According to " production of energy and consumption revolution are strategic (2016-2030) ", to the year two thousand thirty, non-fossil energy generated energy will reach 50% or so,
Wherein the clean energy resourcies such as wind-powered electricity generation, solar energy generated energy will become and increase the main force.Due to the uncertainty of wind-powered electricity generation, solar power generation,
The problems such as seasonality and insufficient regional and nuclear power peak modulation capacity of water power, determine that coal electricity is in electric power in the following regular period
Fundamental position in supply is still unshakable, and guarantee electric power supply substantially, guarantee electricity net safety stable, increase peak load regulation network
Flexibility etc. plays main function, but downward trend will be presented in the equipment utilization hour of forecasting coal electricity, power factor, and
The ability of flexibility peak regulation need to greatly improve.According to national large-sized unit efficiencies pair in 2017 of China Electricity Council's publication
Mark data, except 1000 megawatts of ultra-supercritical coal-fired power generating units average output coefficients reach 74.03%, other each capacitance grades
Thermal generation unit annual power factor is less than 70%.
" coal electricity energy-saving and emission-reduction action plan (2014-2020) " (hair changes the energy (2014) 2093) requires, " to 2020
Year, average net coal consumption rate is lower than 310 grams/kilowatt hour after the transformation of active service Thermal generation unit, and wherein 600,000 kilowatts of active service or more
Average net coal consumption rate is lower than 300 grams/kilowatt hour after unit (in addition to air cooling unit) transformation ".According to existing 600 megawatts it is overcritical,
Subcritical and following level capacity unit design level and newest conventional energy saving retrofit technology, most pure condensing turbines
When below 70% power factor, the net coal consumption rate of unit would become hard to reach above-mentioned requirements under annual actual operating mode, need one
It kind further increases that 600 megawatts overcritical, subcritical and following level coal fired power generation pure condensate generatine set heat efficiency, especially improves
The systematization transformation method of part load efficiency is horizontal to further increase unit efficiency.
Summary of the invention
Present invention seek to address that the above problem, provides one kind by increasing the regenerative steam sum of series method of operation to optimize vapour
Turbine flow area, the method and system for improving flexibility peak modulation capacity and the coal-fired thermal power generation unit thermal efficiency.
The method of the present invention for improving the coal-fired thermal power generation unit thermal efficiency, is improved efficiency by Turbine Flow Path
Transformation, adds the adjustable high-pressure extraction steam extraction of level-one and feed-water heater, using investment on Turbo-generator Set high pressure cylinder
Increase turbine LP rotors power regulation ability with the mode of this grade of heater of excision, to optimize Control Stage of Steam Turbine and high pressure
Cylinder circulation area realizes that Turbo-generator Set heat consumption rate checks and accepts (Turbine Heat Acceptance, THA) operating condition and steamer
Specified (Turbine Rated Load, the TRL) operating condition of machine reach turbine high-pressure regulating valve standard-sized sheet (Valve wide open,
VWO) operating condition maximum throttle flow from raising Steam Turbine Regenerative System efficiency, reduces governing stage restriction loss and displacement loss
To improve the efficiency under the thermal efficiency of Turbo-generator Set, especially middle-low load.The coal-fired thermal power generation of raising of the present invention
The method of generatine set heat efficiency provides a kind of subcritical and supercritical turbine generator group and passes through plan boundary condition and heating power system
System optimization redefines Turbo-generator Set continous maximum rating (Turbine come the method for effectively improving its thermal efficiency
Maximum Continuous Rating, TMCR), maximum power (Maximum Capability) and maximum overload rating
(Maximum Overload Capability).It is primary that increased adjustable high-pressure extraction extraction heater can increase unit
Frequency modulation and Automatic Generation Control (Auto matic Generation Control, AGC) speed of response are eliminated high to greatest extent
The restriction loss of regulating valve is pressed, secondly underload can be improved under the premise of guaranteeing that enthalpy is owed in boiler feedwater in increased regenerative steam
Lower selective catalytic reduction (Selective Catalytic Reduction, SCR) denitration inlet flue gas temperature guarantees denitration system
It unites safe and reliable investment, increases unit depth peak modulation capacity.
Preferably, the method for the present invention for improving the coal-fired thermal power generation unit thermal efficiency, further includes in steam turbine generator
High plus steam condenser is installed additional on group intermediate pressure cylinder first order regenerative steam pipeline, is sent out by the way that the raising of the steam extraction degree of superheat is aforementioned in steamer
The entrance feed temperature of the high-pressure extraction steam extraction and feed-water heater added on motor group high pressure cylinder, so as to improve steam turbine generator
The thermal efficiency of group.Existing high-pressure extraction steam extraction and feed-water heater operating condition can be improved by height plus steam condenser, reduced
The denitration facility forced outage environmental protection event or machine that may cause by high-pressure extraction steam extraction and the maintenance of feed-water heater leakage failure
Group unplanned outage event occurrence probability.
Further, the method for the present invention for improving the coal-fired thermal power generation unit thermal efficiency, it is described adjustable high to push back
The front end of hot steam extraction and feed-water heater, which is provided with, is included in steam turbine digital formula electro-hydraulic control system (digital electro-
Hydraulic control system, DEH) control height add steam control valve；Steam control valve, which is added, by height controls high pressure
The investment and excision of regenerative steam and feed-water heater.
The system of the present invention for improving the coal-fired thermal power generation unit thermal efficiency, including in steam turbine high-pressure cylinder, steam turbine
Cylinder pressure, turbine high-pressure regulating valve, boiler superheater, boiler reheater, No. 0 high-pressure extraction steam extraction and feed-water heater, No. 1 height
Press regenerative steam and feed-water heater, No. 2 high-pressure extraction steam extractions and feed-water heater and No. 3 high-pressure extraction steam extractions and water supply heating
Device；No. 0 high-pressure extraction steam extraction and feed-water heater, No. 1 high-pressure extraction steam extraction and feed-water heater, No. 2 high-pressure extractions are taken out
Vapour and feed-water heater and No. 3 high-pressure extraction steam extractions and feed-water heater are sequentially connected and connect；It No. 0 high-pressure extraction steam extraction and gives
Water heater, No. 1 high-pressure extraction steam extraction and feed-water heater and No. 2 high-pressure extraction steam extractions and feed-water heater with steam turbine height
Cylinder pressure is connected；No. 0 high-pressure extraction steam extraction and feed-water heater pass sequentially through boiler heater and turbine high-pressure is adjusted
It is connected after valve with steamer high pressure cylinder；The steam turbine high-pressure cylinder is connected by boiler reheater with Steam Turbine Through IP Admission；Institute
Steam Turbine Through IP Admission is stated to be connected with No. 3 high-pressure extraction steam extractions and feed-water heater；No. 0 high-pressure extraction steam extraction and water supply add
Height, which is provided with, between hot device and steam turbine high-pressure cylinder adds steam control valve.
Preferably, the system of the present invention for improving the coal-fired thermal power generation unit thermal efficiency, the Steam Turbine Through IP Admission and 3
High plus steam condenser number is provided between high-pressure extraction steam extraction and feed-water heater；The high plus steam condenser is arranged one time
Road is connected between No. 0 high-pressure extraction steam extraction and feed-water heater import and No. 1 high-pressure extraction steam extraction and feed-water heater outlet.
The method and system of the present invention for improving the coal-fired thermal power generation unit thermal efficiency are compared with prior art, beneficial
Effect are as follows:
(1) regenerative steam heater and Gao Jia steam condenser is adjusted in the increased level-one of the present invention, by improving boiler feedwater
Temperature, to improve the backheat economy of unit, THA operating condition reduces by 0.35 percentage point of thermal loss of steam turbine rate or so, enhances
Unit depth peak modulation capacity and primary frequency modulation grade AGC governing response ability.
(2) investment of regenerative steam is adjusted by increased level-one and excision optimizes steam turbine flow area, realized
THA operating condition and TRL operating condition are VWO operating condition throttle flow, eliminate THA operating condition under former design condition valve throttle loss and
Governing stage displacement loss, and reduce conventional draft and propose boiler allowance loss caused by effect not increase-volume, improving unit
2 percentage points of high pressure cylinder efficiency or so are improved on the basis of backheat economy, THA operating condition reduces thermal loss of steam turbine rate 0.33 hundred
Branch or so.
(3) optimized by steam turbine flow area, the heat consumption rate under the power output of steam turbine part can be greatly reduced.According to difference
Steam turbine under design condition, 75%THA operating condition heat consumption rate can reduce 0.4%-1.2%, and 50%THA operating condition heat consumption rate can reduce
0.4%-2.7%。
(4) by improving the feed temperature under underload, it can be effectively improved SCR denitration investment condition, guarantee environmental protection facility
Reliable investment, improves unit depth peak modulation capacity；Existing high-pressure extraction steam extraction and water supply can be improved by height plus steam condenser
Heater operating condition is reduced because the denitration facility quilt that may cause is overhauled in high-pressure extraction steam extraction and feed-water heater leakage failure
Compel stop transport environmentally friendly event or unit unplanned outage event occurrence probability.
Detailed description of the invention
Fig. 1 is the system structure diagram of the present invention for improving the coal-fired thermal power generation unit thermal efficiency；
Wherein 1- boiler superheater；2- turbine high-pressure regulating valve；3- steam turbine high-pressure cylinder；4- boiler reheater；5- steam turbine
Intermediate pressure cylinder；6- high adds steam control valve；The steam extraction of 7-3 high-pressure extraction and feed-water heater；The steam extraction of 8-2 high-pressure extraction and water supply
Heater；The steam extraction of 9-1 high-pressure extraction and feed-water heater；10- high adds steam condenser；It the steam extraction of 11-0 high-pressure extraction and gives
Water heater.
Specific embodiment
With reference to the accompanying drawing and implement to the method and system of the present invention for improving the coal-fired thermal power generation unit thermal efficiency
It is described in detail.It will be understood by those skilled in the art that the following example is merely to illustrate the present invention, without that should regard
To limit the scope of the invention.
Embodiment one
The system of the present invention for improving the coal-fired thermal power generation unit thermal efficiency, as shown in Figure 1, including steam turbine high-pressure cylinder 3, vapour
Turbine intermediate pressure cylinder 5, turbine high-pressure regulating valve 2, boiler superheater 1,4, No. 0 high-pressure extraction steam extractions of boiler reheater and water supply add
9, No. 2 high-pressure extraction steam extractions of 11, No. 1 high-pressure extraction steam extractions of hot device and feed-water heater and feed-water heater 8 and No. 3 high-pressure extraction
Steam extraction and feed-water heater 7；11, No. 1 high-pressure extraction steam extractions of No. 0 high-pressure extraction steam extraction and feed-water heater and water supply heating
9, No. 2 high-pressure extraction steam extractions of device and the steam extraction of feed-water heater 8 and No. 3 high-pressure extraction and feed-water heater 7 are sequentially connected and connect；It is described
11, No. 1 high-pressure extraction steam extractions of No. 0 high-pressure extraction steam extraction and feed-water heater and the steam extraction of feed-water heater 9 and No. 2 high-pressure extraction and
Feed-water heater 8 is connected with steam turbine high-pressure cylinder 3；No. 0 high-pressure extraction steam extraction and feed-water heater 11 pass sequentially through
It is connected after boiler heater and turbine high-pressure regulating valve 2 with steamer high pressure cylinder；The steam turbine high-pressure cylinder 3 passes through boiler again
Hot device 4 is connected with Steam Turbine Through IP Admission 5；7 phase of the Steam Turbine Through IP Admission 5 and No. 3 high-pressure extraction steam extraction and feed-water heater
Connection；Height, which is provided with, between No. 0 high-pressure extraction steam extraction and feed-water heater 11 and steam turbine high-pressure cylinder 3 adds steam control valve
6.High plus steam condenser 10 is provided between the Steam Turbine Through IP Admission 5 and No. 3 high-pressure extraction steam extraction and feed-water heater 7；
The high plus steam condenser 10 is arranged primary Ioops and is connected to No. 0 high-pressure extraction steam extraction and 11 import of feed-water heater and No. 1 height
It presses between regenerative steam and the outlet of feed-water heater 9.
In the present embodiment, increase the high-pressure extraction pumping that throttle flow is adjusted in level-one in steam turbine high-pressure cylinder 3 as shown in Figure 1
Vapour and feed-water heater are defined as No. 0 high-pressure extraction steam extraction and feed-water heater 11.By the specified main steam of steam turbine, reheating
Under the conditions of steam parameter and defined back pressure, 0 make-up water rate, No. 0 high-pressure extraction steam extraction and feed-water heater 11 are fixed when putting into
Justice is THA operating condition, is defined as TMCR operating condition when No. 0 high-pressure extraction steam extraction and feed-water heater 11 are cut off；Steam turbine is specified
Main steam, reheated steam parameter and defined back pressure, under the conditions of 1.5% make-up water rate, No. 0 high-pressure extraction steam extraction and water supply
Heater 11 is defined as TRL operating condition when cutting off；And THA, TMCR, TRL operating condition throttle flow are VWO operating condition throttle flow.Pass through
Feed temperature is improved to improve unit heat regenerative system efficiency；Boiler exhaust gas is improved secondly by the feed temperature improved under underload
Temperature guarantees that SCR denitration system is securely and reliably put into；Again by the adjustable steam extraction raising unit primary frequency modulation of the grade and automatically
Generation Control (Auto matic Generation Control, AGC) governing response rate.
Steam condenser is installed additional on intermediate pressure cylinder first order regenerative steam pipeline, improves No. 0 high pressure using the steam extraction degree of superheat
11 entrance feed temperature of regenerative steam and feed-water heater, further increases heat regenerative system economy；It is lowered into the grade simultaneously
The extraction temperature of heater reduces metal fever and answers by reducing high-pressure extraction steam extraction and feed-water heater carbonated drink side temperature gradient
The problems such as power, this grade of heater heat exchanger tube leakage caused by avoiding thermal stress from concentrating, internal partition, involucrum weld bond cracking.
By providing, one kind is subcritical and supercritical turbine generator group passes through plan boundary condition and optimization of Thermal System
Method to effectively improve its thermal efficiency.I.e. by redefining Turbo-generator Set continous maximum rating (Turbine
Maximum Continuous Rating, TMCR), maximum power (Maximum Capability) and maximum overload rating
(Maximum Overload Capability) is adjusted regenerative steam by increasing level-one maximum pressure grade, and passes through throwing
The method for entering and cutting off this grade of heater realizes that thermal loss of steam turbine rate checks and accepts (Turbine Heat Acceptance, THA) operating condition
With specified (Turbine Rated Load, the TRL) operating condition of steam turbine be septum valve standard-sized sheet (Valve wide open,
VWO it is through-flow to optimize and revise 3 governing stage of steam turbine high-pressure cylinder while improving unit backheat economy for) operating condition maximum throttle flow
Area increases regulating valve adjustable range, in the case where keeping existing septum valve quantity to improve steam turbine high-pressure cylinder 3
Efficiency.For same type turbine LP rotors different designs condition, T Steam Turbine HA operating condition heat consumption rate 0.5%-0.7% can be reduced,
75%THA operating condition heat consumption rate 0.4%-1.2% is reduced, 50%THA operating condition heat consumption rate 0.4%-3.2% is reduced, steamer can be effectively improved
The thermal efficiency under machine middle-low load；Increased adjustable high-pressure extraction steam extraction simultaneously can increase unit primary frequency modulation and AGC response
Rate eliminates the restriction loss of septum valve to greatest extent, and secondly increased regenerative steam is guaranteeing the deficient enthalpy of boiler feedwater
Under the premise of, selective catalytic reduction under underload (Selective Catalytic Reduction, SCR) denitration can be improved
Inlet flue gas temperature guarantees the safe and reliable investment of denitrating system, increases unit depth peak modulation capacity.
Embodiment two
On the basis of example 1, with the subcritical pure condensate wet cooling gas turbine generating set flow passage component of certain power plant import 600MW
For improving efficiency transformation, in conventional draft part on the basis of renovation technique, add steam condenser 10 and 0 by increasing No. 3 height
Number high-pressure extraction steam extraction and feed-water heater 11 can be improved 23 DEG C of feed temperature, reduce THA operating condition thermal loss of steam turbine rate 26kJ/
KWh or so, and T Steam Turbine HA operating condition throttle flow can be increased to TRL operating condition throttle flow, and keep 4VWO standard-sized sheet, improve steamer
1.5 percentage points or so of 3 efficiency of machine high pressure cylinder, adding up to reduces THA operating condition thermal loss of steam turbine rate 50kJ/kWh or more, improves steamer
0.65 percentage point of engine efficiency or so.75%, 50%THA operating condition improves feed temperature at 20 DEG C or so, heat regenerative system efficiency ratio THA
Operating condition is higher；Optimize in combination with septum valve, improves steam turbine sub-load main steam pressure, 75%, 50%THA operating condition vapour
The control of turbine generator group heat consumption rate only increases 90kJ/kWh and 350kJ/kWh than THA respectively, substantially better than former design 75%, 50%
THA operating condition ratio THA operating condition increases 182kJ/kWh and 570kJ/kWh respectively, reduces by 1.03 percentage points of thermal loss of steam turbine rate respectively
With 2.7 percentage points, significantly improve the performance driving economy under Turbo-generator Set middle-low load.
Claims (5)
1. a kind of method for improving the coal-fired thermal power generation unit thermal efficiency, it is characterised in that: improved by Turbine Flow Path
Efficiency transformation, adds the adjustable high-pressure extraction steam extraction of level-one and feed-water heater on Turbo-generator Set high pressure cylinder, uses
The mode for putting into and cutting off this grade of heater increases turbine LP rotors power regulation ability, with optimize Control Stage of Steam Turbine and
High pressure cylinder circulation area realizes that Turbo-generator Set heat consumption rate checks and accepts operating condition and steam turbine declared working condition is turbine high-pressure tune
Valve (2) standard-sized sheet operating condition maximum throttle flow is saved, the thermal efficiency of Turbo-generator Set is improved.
2. improving the method for the coal-fired thermal power generation unit thermal efficiency according to claim 1, it is characterised in that: further include in vapour
It installs additional on turbine generator group intermediate pressure cylinder first order regenerative steam pipeline high plus steam condenser (10), is improved by the steam extraction degree of superheat
The entrance feed temperature of the aforementioned high-pressure extraction steam extraction and feed-water heater added on Turbo-generator Set high pressure cylinder, is mentioned with this
The thermal efficiency of high Turbo-generator Set.
3. the method according to claim 1 or claim 2 for improving the coal-fired thermal power generation unit thermal efficiency, it is characterised in that: it is described can
The high-pressure extraction steam extraction of adjusting and the front end of feed-water heater are provided with height and add steam control valve (6).
4. a kind of system for improving the coal-fired thermal power generation unit thermal efficiency, it is characterised in that: including steam turbine high-pressure cylinder (3), vapour
Turbine intermediate pressure cylinder (5), turbine high-pressure regulating valve (2), boiler superheater (1), boiler reheater (4), No. 0 high-pressure extraction steam extraction
And feed-water heater (11), No. 1 high-pressure extraction steam extraction and feed-water heater (9), No. 2 high-pressure extraction steam extractions and feed-water heater
(8) and No. 3 high-pressure extraction steam extractions and feed-water heater (7)；No. 0 high-pressure extraction steam extraction and feed-water heater (11), No. 1 height
It presses regenerative steam and feed-water heater (9), No. 2 high-pressure extraction steam extractions and feed-water heater (8) and No. 3 high-pressure extraction steam extractions and gives
Water heater (7), which is sequentially connected, to be connect；It No. 0 high-pressure extraction steam extraction and feed-water heater (11), No. 1 high-pressure extraction steam extraction and gives
Water heater (9) and No. 2 high-pressure extraction steam extractions and feed-water heater (8) are connected with steam turbine high-pressure cylinder (3)；Described No. 0
High-pressure extraction steam extraction and feed-water heater (11) pass sequentially through boiler heater and turbine high-pressure regulating valve (2) afterwards with steamer height
Cylinder pressure is connected；The steam turbine high-pressure cylinder (3) is connected by boiler reheater (4) with Steam Turbine Through IP Admission (5)；The vapour
Turbine intermediate pressure cylinder (5) is connected with No. 3 high-pressure extraction steam extractions and feed-water heater (7)；No. 0 high-pressure extraction steam extraction and water supply
It is provided with height between heater (11) and steam turbine high-pressure cylinder (3) and adds steam control valve (6).
5. improving the system of the coal-fired thermal power generation unit thermal efficiency according to claim 4, it is characterised in that: the steam turbine
High plus steam condenser (10) are provided between intermediate pressure cylinder (5) and No. 3 high-pressure extraction steam extractions and feed-water heater (7)；The height
Steam condenser (10) setting primary Ioops are added to be connected to No. 0 high-pressure extraction steam extraction and feed-water heater (11) import and No. 1 high pressure
Between regenerative steam and feed-water heater (9) outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811366752.4A CN109630222A (en) | 2018-11-16 | 2018-11-16 | A kind of method and system improving the coal-fired thermal power generation unit thermal efficiency |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811366752.4A CN109630222A (en) | 2018-11-16 | 2018-11-16 | A kind of method and system improving the coal-fired thermal power generation unit thermal efficiency |
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ID=66068143
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318831A (en) * | 2019-07-04 | 2019-10-11 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of regenerative steam system of single reheat power generator turbine |
| CN115523000A (en) * | 2022-10-19 | 2022-12-27 | 峰和轻碳(北京)设计研究院有限公司 | Thermal power peak regulation energy-saving system based on pre-regulation stage small steam turbine and regulation method |
-
2018
- 2018-11-16 CN CN201811366752.4A patent/CN109630222A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318831A (en) * | 2019-07-04 | 2019-10-11 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of regenerative steam system of single reheat power generator turbine |
| CN115523000A (en) * | 2022-10-19 | 2022-12-27 | 峰和轻碳(北京)设计研究院有限公司 | Thermal power peak regulation energy-saving system based on pre-regulation stage small steam turbine and regulation method |
| CN115523000B (en) * | 2022-10-19 | 2024-05-14 | 峰和轻碳(北京)设计研究院有限公司 | Thermal power peak regulation energy-saving system and regulation method of small pre-regulation stage steam turbine |
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