CN106368751B - The interference suppressing method of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW - Google Patents
The interference suppressing method of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW Download PDFInfo
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- CN106368751B CN106368751B CN201610763603.6A CN201610763603A CN106368751B CN 106368751 B CN106368751 B CN 106368751B CN 201610763603 A CN201610763603 A CN 201610763603A CN 106368751 B CN106368751 B CN 106368751B
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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
- F01K13/02—Controlling, e.g. stopping or starting
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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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/14—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to other specific conditions
-
- 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
-
- 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
- F01K7/32—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 using steam of critical or overcritical pressure
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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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Control Of Turbines (AREA)
Abstract
When back pressure improves suddenly,Script system can reduce the power of feed pump turbine automatically,Feed pump turbine and main steam turbine presence is caused to rob vapour phenomenon,The invention provides the interference suppressing method of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW,Utilize the confluent setting value of the backpressure data and feed pump turbine collected,Intermediate pressure cylinder feed pump turbine steam line motor-driven valve by feed pump turbine is calculated needs the valve position numerical quantity changed under current backpressure condition,In the ban feed pump turbine intermediate pressure cylinder feed pump turbine steam line motor-driven valve set valve bit value plus feed pump turbine intermediate pressure cylinder feed pump turbine steam line motor-driven valve need the valve position numerical quantity that changes be exactly back pressure numerical value as A when,The valve position of feed pump turbine intermediate pressure cylinder feed pump turbine steam line motor-driven valve,To improve feed pump turbine power,Eliminate the direct current cooker potential safety hazard that feed pump turbine power swing is brought.
Description
Technical field
The present invention relates to the in line Air-Cooling Island apparatus field of steam power plant's feed pump turbine, more particularly to a kind of 350MW is super faces
The interference suppressing method of the system of the in line Air-Cooling Island of boundary's double extraction unit feed pump turbine.
Background technology
The feed pump turbine type of cooling of China's direct air-cooling units is mainly cold using single indirect air cooling system at present
But, the independent type of cooling is divided into force ventilation indirect air cooling system and natural draft indirect dry cooling system；Also one kind is current not
The ripe type of cooling is the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW, but and feed pump
The mode that steam turbine individually cools down, which compares, has saved many corollary equipments, greatly reduces cost, has saved hold facility
Space and rational airspace, eliminate equipment maintenance, while economize on water to greatest extent, increase unit annualized return,
So the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of mature and stable 350MW still have it is very big excellent
Gesture.
Subject matter existing for the system of the current overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW have with
Descend some：First, condensing plant back pressure is influenceed greatly by steam temperature, wind speed, wind direction etc., in unit running process, economy is big and frequency
Numerous, the regulation to feed pump turbine requires high, needs frequently to adjust in running；Two be due to that feed pump turbine steam discharge is straight
The big machine condensing plant of row is tapped into, when back pressure increases, in order to maintain the pump discharge that feeds water, feed pump turbine and main steam turbine are present
Vapour phenomenon is robbed, load fluctuation, unit integrated regulation difficulty can be caused；Third, under high back pressure operating mode, the enthalpy of feed pump turbine
Drop reduces, and exhaust enthalpy amount significantly changes the insecurity for adding unit operating mode, especially in strong wind or fitful wind day vapour, the back of the body
Bucklingization is frequently and violent, easily causes feed pump turbine pitch and acts frequently, and feed pump capacity is unstable；Fourth, direct current cooker is not
Dum boiler before being same as, direct current cooker do not have heat storage capacity, sensitive for the change in terms of vapor (steam) temperature and pressure, for
Automatic control system requires higher.
The content of the invention
In view of the shortcomings of the prior art, the technical problems to be solved by the invention are to provide a kind of overcritical black soy sauces of 350MW
The interference suppressing method of the system of the in line Air-Cooling Island of unit feed pump turbine, utilize the backpressure data and direct current collected
Boiler feed capacity setting value, by the feed pump turbine low pressure that back pressure feedforward numerical quantity, i.e. feed pump turbine is calculated
Vapour source electric valve for pipeline needs the valve position numerical quantity changed under current backpressure condition, in the ban feed pump turbine feed pump steamer
Machine low pressure steam source pipe road motor-driven valve setting valve bit value is electronic plus feed pump turbine feed pump turbine low pressure steam source pipe road
Valve needs the valve position numerical quantity that changes, when to be exactly back pressure numerical value be A, feed pump turbine feed pump turbine low pressure steam source pipe road
The valve position of motor-driven valve.
The technical solution adopted for the present invention to solve the technical problems is：
The interference suppressing method of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW, institute
Stating the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW includes：Direct current cooker, main steam line, height
The high discharge pipe of cylinder pressure, high pressure cylinder, feed pump turbine high-pressure steam source pipeline, feed pump turbine high-pressure steam source electric valve for pipeline,
Feed pump turbine low pressure steam source pipe road motor-driven valve, reheater, hot reheat steam line, intermediate pressure cylinder, feed pump turbine low pressure
Draw gas butterfly valve, the heating of vapour source pipeline, deoxygenation extraction line, extraction steam for factories pipeline, non-return valve, intermediate pressure cylinder blow-off line, heating is taken out
Steam pipe road, low pressure (LP) cylinder, exhaust equipment of LP casing road, feed pump turbine, feed pump turbine blow-off line, electronic steam supply baffle plate,
Air-Cooling Island, sensing device；The jet chimney that goes out of direct current cooker (22) connects with main steam line, and direct current cooker is main steam line
Vapours is inputted, main steam line connects with the air intake of high pressure cylinder, and the steam drain You Liangge branches of high pressure cylinder a, branch leads to
The high discharge pipe of high pressure cylinder to be crossed with reheater to be connected, reheater is connected by hot reheat steam line with the air intake of intermediate pressure cylinder,
Reheater is that intermediate pressure cylinder inputs reheated steam, and intermediate pressure cylinder has two extraction openings, and one is with using the place input of steam to steam in factory
The extraction steam for factories mouth of the extraction steam for factories pipeline communication of vapour, extraction steam for factories mouth are provided with electronic steam supply baffle plate, another be with for except
The intermediate pressure cylinder oxygen-eliminating device extraction opening of the deoxygenation extraction line connection of oxygen device input steam, offer on deoxygenation extraction line branch to
Water pump steam turbine low-pressure vapour source pipeline, feed pump turbine low pressure steam source pipe road are connected with the air intake of feed pump turbine,
The steam that feed pump turbine low pressure steam source pipe road is inputted in deoxygenation extraction line to feed pump turbine, feed pump turbine are low
Feed pump turbine low pressure steam source pipe road motor-driven valve of the control by quantity of steam, the steam discharge of high pressure cylinder are provided with pressure vapour source pipeline
Another branch of mouth is connected by feed pump turbine high-pressure steam source pipeline with feed pump turbine low pressure steam source pipe road, is given
Feed pump turbine high-pressure steam source electric valve for pipeline of the control by quantity of steam is provided with water pump turbine high-pressure vapour source pipeline,
When the steam deficiency of feed pump turbine low pressure steam source pipe road input feed pump turbine, feed pump turbine high pressure vapour
Source capsule road is that feed pump turbine inputs more steam as standby steam line, on feed pump turbine low pressure steam source pipe road
It is provided with so that steam can only flow to the non-return valve of feed pump turbine from deoxygenation extraction line, for preventing feed pump turbine
When high-pressure steam source pipeline is that feed pump turbine inputs steam, steam pours in down a chimney into intermediate pressure cylinder；The steam drain of intermediate pressure cylinder passes through middle pressure
Cylinder blow-off line connects with the air intake of low pressure (LP) cylinder, inputs steam for low pressure (LP) cylinder, the steam drain of low pressure (LP) cylinder passes through low pressure (LP) cylinder steam discharge
Pipeline is connected with Air-Cooling Island, and the steam drain of feed pump turbine is connected by feed pump turbine blow-off line with Air-Cooling Island；Institute
Pressure sensor, temperature sensor and air velocity transducer that sensing device includes being arranged on Air-Cooling Island surrounding are stated, in addition to is set
Flow sensor on feed pump turbine feedwater piping；Feed pump turbine high-pressure steam source electric valve for pipeline, feedwater mercury vapour
Turbine low pressure steam source pipe road motor-driven valve, electronic steam supply baffle plate, non-return valve, the heating butterfly valve that draws gas are electrically connected with central processing unit respectively
Connect, central processing unit control feed pump turbine high-pressure steam source electric valve for pipeline, feed pump turbine low pressure steam source pipe road are electronic
Valve, electronic steam supply baffle plate, non-return valve, heating draw gas the action of butterfly valve, and central processing unit receives and shows the signal of sensing device；
The interference suppressing method of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of described 350MW include with
Lower step：
Back pressure signal gathers：
In the backpressure data information of the outside of Air-Cooling Island installation pressure sensor collection Air-Cooling Island, and the data of collection are believed
Breath is transferred to central processing unit；
Direct current cooker (22) confluent duty setting signal gathers：
Direct current cooker confluent setting value is read from steam power plant's DCS system, and the data information transfer of collection is given
Central processor；
Calculate the valve position amount that the feed pump turbine low pressure steam source pipe road motor-driven valve of feed pump turbine needs to change：
The back pressure numerical value A of Air-Cooling Island is imported polygronal function and back pressure correction factor B is calculated by central processing unit;
Feedwater quantity correction coefficient D is calculated in direct current cooker (22) confluent setting value numerical value C importing polygronal functions；
The back pressure numerical value A of Air-Cooling Island is multiplied by back pressure correction factor B and is multiplied by the setting of direct current cooker confluent by central processing unit
Value numerical value C is multiplied by feedwater quantity correction coefficient D and obtains back pressure feedforward numerical quantity, and back pressure feedforward numerical quantity is exactly feed pump turbine
Feed pump turbine low pressure steam source pipe road motor-driven valve needs the valve position numerical quantity changed in back pressure numerical value A；
Determine the feed pump turbine low pressure steam source pipe road motor-driven valve valve position numerical quantity of feed pump turbine：
The valve position amount of the feed pump turbine low pressure steam source pipe road motor-driven valve of central processing unit control feed pump turbine changes
Become, i.e., current feed pump turbine feed pump turbine low pressure steam source pipe road motor-driven valve setting valve position numerical quantity is plus feedwater mercury vapour
Turbine feed pump turbine low pressure steam source pipe road motor-driven valve needs the valve position numerical quantity changed, when to be exactly back pressure numerical value be A, feeds water
The valve position numerical quantity of mercury vapour turbine feed pump turbine low pressure steam source pipe road motor-driven valve.
Optimal, feed water mercury vapour in the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW
The tripping operation back pressure of turbine is higher than the tripping operation back pressure of Turbo-generator Set, and the full shipping row highest back pressure of Turbo-generator Set is 40,000
Pa, minimum operation back pressure are 7 kPas, and highest allows longtime running back pressure to be less than 60 kPas, and tripping operation back pressure is 65 kPas；It is described
Feed pump turbine tripping operation back pressure be 75 kPas.
Optimal, determine the specific step that the feed pump turbine low pressure steam source pipe road motor-driven valve valve position of feed pump turbine is measured
Suddenly also include：When the valve bit instruction of feed pump turbine low pressure steam source pipe road motor-driven valve is more than 95%, select in following three kinds of methods
At least one be used to improve feed pump turbine power, first method, central processing unit control feed pump turbine high pressure
Feed pump turbine high-pressure steam source electric valve for pipeline on vapour source pipeline is opened so that feed pump turbine high-pressure steam source pipeline is
Feed pump turbine inputs steam, the quantity of steam of increase feed pump turbine input, to improve feed pump turbine power；Second
Kind method, the electronic certain aperture of steam supply flapper closure that central processing unit control extraction steam for factories mouth is set, increases feed pump steamer
The pressure of machine, to improve feed pump turbine power；The third method, central processing unit control heating draw gas butterfly valve closing necessarily
Aperture, increase the pressure of feed pump turbine, to improve feed pump turbine power.
When back pressure improves suddenly, i.e., feed pump turbine regulating power deficiency when, script system can reduce feed pump automatically
The power of steam turbine, causing feed pump turbine and main steam turbine, feed pump turbine power swing is brought in the presence of vapour phenomenon is robbed
Direct current cooker potential safety hazard, what it is the invention provides the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW is
The interference suppressing method of system, using the backpressure data and direct current cooker confluent setting value collected, by being calculated
Back pressure feedforward numerical quantity, i.e., the feed pump turbine low pressure steam source pipe road motor-driven valve of feed pump turbine is under current backpressure condition
The valve position numerical quantity changed is needed, in the ban feed pump turbine feed pump turbine low pressure steam source pipe road motor-driven valve setting valve digit
The valve position numerical quantity that value needs to change plus feed pump turbine feed pump turbine low pressure steam source pipe road motor-driven valve, is exactly back pressure
When numerical value is A, the valve position of feed pump turbine feed pump turbine low pressure steam source pipe road motor-driven valve, to improve feed pump turbine
Power, eliminate the direct current cooker potential safety hazard that feed pump turbine power swing is brought.
Brief description of the drawings
Accompanying drawing 1 is the connection block diagram of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW.
In figure：The high discharge pipe 3 of main steam line 1, high pressure cylinder 2, high pressure cylinder, feed pump turbine high-pressure steam source pipeline 4, give
Water pump turbine high-pressure vapour source electric valve for pipeline 5, feed pump turbine low pressure steam source pipe road motor-driven valve 6, deoxygenation extraction line 7,
Hot reheat steam line 8, intermediate pressure cylinder 9, feed pump turbine low pressure steam source pipe road 10, extraction steam for factories pipeline 11, non-return valve 12, in
Cylinder pressure blow-off line 13, heating draw gas butterfly valve 15, heating extraction line 14, low pressure (LP) cylinder 16, exhaust equipment of LP casing road 17, feed pump
Steam turbine 18, feed pump turbine blow-off line 19, electronic steam supply baffle plate 20, Air-Cooling Island 21, direct current cooker 22.
Embodiment
With reference to the accompanying drawing of the present invention, the technical scheme of inventive embodiments is further elaborated.
Referring to the drawings shown in 1, the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW includes：Directly
Flow boiler 22, main steam line 1, high pressure cylinder 2, the high discharge pipe 3 of high pressure cylinder, feed pump turbine high-pressure steam source pipeline 4, feed pump
Turbine high-pressure vapour source electric valve for pipeline 5, feed pump turbine low pressure steam source pipe road motor-driven valve 6, reheater, reheat heat steam pipe
Road 8, intermediate pressure cylinder 9, feed pump turbine low pressure steam source pipe road 10, extraction steam for factories pipeline 11, deoxygenation extraction line 7, non-return valve 12,
Electronic steam supply baffle plate 20, intermediate pressure cylinder blow-off line 13, heating draw gas butterfly valve 15, heating extraction line 14, low pressure (LP) cylinder 16, low pressure (LP) cylinder
Blow-off line 17, feed pump turbine 18, feed pump turbine blow-off line 19, Air-Cooling Island 21, central processing unit and sensing dress
Put.
Sensing device includes the pressure sensor, temperature sensor and air velocity transducer for being arranged on the surrounding of Air-Cooling Island 21, also
Including the flow sensor being arranged on the feedwater piping of feed pump turbine 18；Feed pump turbine high-pressure steam source electric valve for pipeline
5th, feed pump turbine low pressure steam source pipe road motor-driven valve 6, electronic steam supply baffle plate 20, non-return valve 12, the heating butterfly valve 15 that draws gas are distinguished
Electrically connected with central processing unit, central processing unit control feed pump turbine high-pressure steam source electric valve for pipeline 5, feed pump turbine
Low pressure steam source pipe road motor-driven valve 6, electronic steam supply baffle plate 20, non-return valve 12, heating draw gas the action of butterfly valve 15, and central processing unit connects
By and show the signal of sensing device.
The jet chimney that goes out of direct current cooker 22 connects with main steam line 1, and direct current cooker 22 is that main steam line 1 inputs heat
Steam, main steam line 1 connect with the air intake of high pressure cylinder 2, and the steam drain You Liangge branches of high pressure cylinder 2 a, branch passes through
The high discharge pipe 3 of high pressure cylinder is connected with reheater, and reheater is connected by hot reheat steam line 8 with the air intake of intermediate pressure cylinder 9,
Reheater is that intermediate pressure cylinder 9 inputs reheated steam.
Intermediate pressure cylinder 9 has two extraction openings, and one is with using the place of steam to input the extraction steam for factories pipeline 11 of steam in factory
The extraction steam for factories mouth of connection, extraction steam for factories mouth are provided with electronic steam supply baffle plate 20, and another is with inputting steam for oxygen-eliminating device
The intermediate pressure cylinder oxygen-eliminating device extraction opening that deoxygenation extraction line 7 connects, it is low that branch's feed pump turbine is offered on deoxygenation extraction line 7
Vapour source pipeline 10 is pressed, feed pump turbine low pressure steam source pipe road 10 is connected with the air intake of feed pump turbine 18, feed pump
The steam that steam turbine low-pressure vapour source pipeline 10 is inputted in deoxygenation extraction line 7 to feed pump turbine 18, feed pump turbine are low
Feed pump turbine low pressure steam source pipe road motor-driven valve 6 of the control by quantity of steam is provided with pressure vapour source pipeline 10.
Another branch of the steam drain of high pressure cylinder 2 passes through feed pump turbine high-pressure steam source pipeline 4 and feed pump steamer
Machine low pressure steam source pipe road 10 is connected, and feedwater of the control by quantity of steam is provided with feed pump turbine high-pressure steam source pipeline 4
Mercury vapour turbine high-pressure steam source electric valve for pipeline 5, the original state of feed pump turbine high-pressure steam source electric valve for pipeline 5 are closing shape
State, when inputting the steam deficiency of feed pump turbine 18 in feed pump turbine low pressure steam source pipe road 10, central processing unit
Feed pump turbine high-pressure steam source electric valve for pipeline 5 on control feed pump turbine high-pressure steam source pipeline 4 is opened so that feedwater
Mercury vapour turbine high-pressure steam source pipeline 4 is that feed pump turbine 18 inputs steam as standby steam line.
It is provided with feed pump turbine low pressure steam source pipe road 10 so that steam can only flow to feedwater from deoxygenation extraction line 7
The non-return valve 12 of mercury vapour turbine 18, for preventing feed pump turbine high-pressure steam source pipeline 4 from being steamed for the input of feed pump turbine 18
During vapour, steam pours in down a chimney into intermediate pressure cylinder 9.
The steam drain of intermediate pressure cylinder 9 is connected by intermediate pressure cylinder blow-off line 13 with the air intake of low pressure (LP) cylinder 16, is low pressure (LP) cylinder 16
Steam is inputted, intermediate pressure cylinder blow-off line 13 is connected by heating extraction line 14 with warm vapour, and vapours, and middle pressure are inputted for warm vapour
It is provided with cylinder blow-off line 13 for controlling the heating of heating pressure to draw gas butterfly valve 15, the steam drain of low pressure (LP) cylinder 16 passes through low pressure
Cylinder blow-off line 17 connects with Air-Cooling Island 21, the steam drain of feed pump turbine 18 by feed pump turbine blow-off line 19 with
Air-Cooling Island 21 connects.
The tripping operation back pressure of feed pump turbine 18 is higher than the tripping operation back pressure of Turbo-generator Set, the full hair of Turbo-generator Set
It is 40 kPas to run highest back pressure, and minimum operation back pressure is 7 kPas, and highest allows longtime running back pressure to be less than 60 kPas, is jumped
Lock back pressure is 65 kPas；The tripping operation back pressure of described feed pump turbine 18 is 75 kPas.
The present invention also provides a kind of back pressure of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW
Disturbance restraining method comprises the following steps：
The first step, back pressure signal collection：
In the backpressure data information of the outside of Air-Cooling Island installation pressure sensor collection Air-Cooling Island, and the data of collection are believed
Breath is transferred to central processing unit；
Second step, the collection of the confluent duty setting signal of direct current cooker 22：
The confluent setting value of direct current cooker 22 is read from steam power plant's DCS system, and the data information transfer of collection is given
Central processing unit；
3rd step, calculate the valve that the feed pump turbine low pressure steam source pipe road motor-driven valve 6 of feed pump turbine needs to change
Position amount：
The back pressure numerical value A of Air-Cooling Island is imported polygronal function and back pressure correction factor B is calculated by central processing unit;
Feedwater quantity correction coefficient D is calculated in the confluent setting value numerical value C of direct current cooker 22 importing polygronal functions；
The back pressure numerical value A of Air-Cooling Island is multiplied by back pressure correction factor B and is multiplied by the confluent of direct current cooker 22 by central processing unit to be set
Definite value numerical value C is multiplied by feedwater quantity correction coefficient D and obtains back pressure feedforward numerical quantity, and back pressure feedforward numerical quantity is exactly feed pump turbine
Feed pump turbine low pressure steam source pipe road motor-driven valve（6）The valve position numerical quantity changed is needed in back pressure numerical value A；
4th step, determine the feed pump turbine low pressure steam source pipe road motor-driven valve of feed pump turbine（6）Valve position numerical quantity：
Central processing unit controls the feed pump turbine low pressure steam source pipe road motor-driven valve of feed pump turbine（6）Valve position amount
Change, i.e., current feed pump turbine feed pump turbine low pressure steam source pipe road motor-driven valve（6）Setting valve position numerical quantity, which adds, to be given
Water pump steam turbine feed pump turbine low pressure steam source pipe road motor-driven valve（6）The valve position numerical quantity changed is needed, is exactly back pressure numerical value
For A when, feed pump turbine feed pump turbine low pressure steam source pipe road motor-driven valve（6）Valve position numerical quantity.
When being improved suddenly for back pressure, script system can reduce the power of feed pump turbine 18 automatically, cause feed pump
Steam turbine 18 and main steam turbine, which exist, robs vapour phenomenon, and the safety of direct current cooker 22 that the power swing of feed pump turbine 18 is brought is hidden
Suffer from, the 4th step, determine the feed pump turbine low pressure steam source pipe road motor-driven valve of feed pump turbine（6）Valve position amount specific steps are also
Including：
The method of work of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of the first 350MW is：
When the back pressure of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW improves suddenly, the mercury vapour that feeds water is caused
The valve bit instruction of turbine low pressure steam source pipe road motor-driven valve 6 be more than 95%, i.e., 18 regulating power deficiency of feed pump turbine when because
Quantity of steam in feed pump turbine high-pressure steam source pipeline 4 exceedes the quantity of steam in feed pump turbine low pressure steam source pipe road 10,
So feed pump turbine high-pressure steam source electric valve for pipeline on central processing unit control feed pump turbine high-pressure steam source pipeline 4
5 open so that feed pump turbine high-pressure steam source pipeline 4 is that feed pump turbine 18 inputs steam, improves feed pump turbine
18 initial steam pressures, to improve the power of feed pump turbine 18,500 kilowatts or so of 18 power of feed pump turbine can be improved, most
The power of senior general's water pump steam turbine 18 brings up to 15000 kilowatts.
The method of work of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of second of 350MW is：
When the back pressure of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW improves suddenly, the mercury vapour that feeds water is caused
The valve bit instruction of turbine low pressure steam source pipe road motor-driven valve 6 be more than 95%, i.e., 18 regulating power deficiency of feed pump turbine when, center
The electronic steam supply baffle plate 20 that processor control extraction steam for factories mouth is set closes certain aperture, increases the pressure of feed pump turbine 18
Power, to improve the power of feed pump turbine 18, to improve 500 kilowatts or so of 18 power of feed pump turbine, most senior general's water pump vapour
The power of turbine 18 brings up to 15000 kilowatts.
The method of work of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of the third 350MW is：
When the back pressure of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW improves suddenly, the mercury vapour that feeds water is caused
The valve bit instruction of turbine low pressure steam source pipe road motor-driven valve 6 be more than 95%, i.e., 18 regulating power deficiency of feed pump turbine when, center
The processor control heating butterfly valve 15 that draws gas closes certain aperture, increases the pressure of feed pump turbine 18, to improve feedwater mercury vapour
The power of turbine 18, to improve 500 kilowatts or so of 18 power of feed pump turbine, the most power of senior general's water pump steam turbine 18 is brought up to
15000 kilowatts.
When only the power of feed pump turbine 18 still can not be improved to more than 10000 kilowatts with one of the above method, then
A kind of method can be selected again on the basis of a kind of method；When two methods can not improve feed pump steamer using remaining unchanged simultaneously
When the power of machine 18 is to more than 10000 kilowatts, then it can simultaneously be used in three kinds of methods and be used for improving the power of feed pump turbine 18 extremely
More than 10000 kilowatts, the most power of senior general's water pump steam turbine 18 brings up to 15000 kilowatts.
Claims (3)
1. the interference suppressing method of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW, it is special
Sign is：The system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW includes：Direct current cooker (22),
Main steam line（1）, high pressure cylinder（2）, the high discharge pipe of high pressure cylinder（3）, feed pump turbine high-pressure steam source pipeline（4）, feed pump
Turbine high-pressure vapour source electric valve for pipeline（5）, feed pump turbine low pressure steam source pipe road motor-driven valve（6）, reheater, reheat heat steam
Steam pipe road（8）, intermediate pressure cylinder（9）, feed pump turbine low pressure steam source pipe road（10）, deoxygenation extraction line（7）, extraction steam for factories pipeline
（11）, non-return valve（12）, intermediate pressure cylinder blow-off line（13）, heating draws gas butterfly valve (15), heating extraction line（14）, low pressure (LP) cylinder
（16）, exhaust equipment of LP casing road（17）, feed pump turbine（18）, feed pump turbine blow-off line（19）, electronic steam supply gear
Plate（20）, Air-Cooling Island（21）, sensing device；Direct current cooker (22) goes out jet chimney and main steam line（1）Connection, direct current pot
Stove (22) is main steam line（1）Input vapours, main steam line（1）With high pressure cylinder（2）Air intake connection, high pressure cylinder
（2）Steam drain You Liangge branches, a branch passes through the high discharge pipe of high pressure cylinder（3）It is connected with reheater, reheater passes through
Hot reheat steam line（8）With intermediate pressure cylinder（9）Air intake connection, reheater is intermediate pressure cylinder（9）Input reheated steam, intermediate pressure cylinder
（9）There are two extraction openings, one is with using the place of steam to input the extraction steam for factories pipeline of steam in factory（11）The industry of connection
Extraction opening, extraction steam for factories mouth are provided with electronic steam supply baffle plate（20）, another is with being drawn gas for the deoxygenation of oxygen-eliminating device input steam
Pipeline（7）The intermediate pressure cylinder oxygen-eliminating device extraction opening of connection, deoxygenation extraction line（7）On offer branch's feed pump turbine low-pressure steam
Source capsule road（10）, feed pump turbine low pressure steam source pipe road（10）With feed pump turbine（18）Air intake be connected, feed water
Mercury vapour turbine low pressure steam source pipe road（10）To feed pump turbine（18）Input deoxygenation extraction line（7）In steam, feed pump
Steam turbine low-pressure vapour source pipeline（10）On be provided with control and pass through the feed pump turbine low pressure steam source pipe road motor-driven valve of quantity of steam
（6）, high pressure cylinder（2）Another branch of steam drain pass through feed pump turbine high-pressure steam source pipeline（4）With feed pump steamer
Machine low pressure steam source pipe road（10）It is connected, feed pump turbine high-pressure steam source pipeline（4）On be provided with control by quantity of steam
Feed pump turbine high-pressure steam source electric valve for pipeline（5）, in feed pump turbine low pressure steam source pipe road（10）Input feed pump vapour
Turbine（18）Steam deficiency when, feed pump turbine high-pressure steam source pipeline（4）It is feed pump as standby steam line
Steam turbine（18）Input more steam, feed pump turbine low pressure steam source pipe road（10）On be provided with so that steam can only from except
Oxygen extraction line（7）Flow to feed pump turbine（18）Non-return valve（12）, for preventing feed pump turbine high-pressure steam source pipe
Road（4）For feed pump turbine（18）When inputting steam, steam pours in down a chimney into intermediate pressure cylinder（9）；Intermediate pressure cylinder（9）Steam drain in
Cylinder pressure blow-off line（13）With low pressure (LP) cylinder（16）Air intake connection, be low pressure (LP) cylinder（16）Input steam, low pressure (LP) cylinder（16）Row
Steam ports passes through exhaust equipment of LP casing road（17）With Air-Cooling Island（21）Connection, feed pump turbine（18）Steam drain pass through feed pump
Turbine discharge pipeline（19）With Air-Cooling Island（21）Connection；The sensing device includes being arranged on Air-Cooling Island（21）The pressure of surrounding
Sensor, temperature sensor and air velocity transducer, in addition to it is arranged on feed pump turbine（18）Flow on feedwater piping passes
Sensor；Feed pump turbine high-pressure steam source electric valve for pipeline（5）, feed pump turbine low pressure steam source pipe road motor-driven valve（6）, it is electronic
Steam supply baffle plate（20）, non-return valve（12）, the heating butterfly valve (15) that draws gas electrically connected respectively with central processing unit, central processing unit control
Feed pump turbine high-pressure steam source electric valve for pipeline（5）, feed pump turbine low pressure steam source pipe road motor-driven valve（6）, electronic steam supply
Baffle plate（20）, non-return valve（12）, heating draw gas the actions of butterfly valve (15), central processing unit receives and shows the letter of sensing device
Number；The interference suppressing method bag of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of described 350MW
Include following steps：
Back pressure signal gathers：
In the backpressure data information of the outside of Air-Cooling Island installation pressure sensor collection Air-Cooling Island, and the data message of collection is passed
It is defeated by central processing unit；
Direct current cooker (22) confluent duty setting signal gathers：
Direct current cooker (22) confluent setting value is read from steam power plant's DCS system, and the data information transfer of collection is given
Central processor；
Calculate the feed pump turbine low pressure steam source pipe road motor-driven valve of feed pump turbine（6）Measure the valve position for needing to change：
The back pressure numerical value A of Air-Cooling Island is imported polygronal function and back pressure correction factor B is calculated by central processing unit;
Feedwater quantity correction coefficient D is calculated in direct current cooker (22) confluent setting value numerical value C importing polygronal functions；
The back pressure numerical value A of Air-Cooling Island is multiplied by back pressure correction factor B and is multiplied by the setting of direct current cooker (22) confluent by central processing unit
Value numerical value C is multiplied by feedwater quantity correction coefficient D and obtains back pressure feedforward numerical quantity, and back pressure feedforward numerical quantity is exactly feed pump turbine
Feed pump turbine low pressure steam source pipe road motor-driven valve（6）The valve position numerical quantity changed is needed in back pressure numerical value A；
Determine the feed pump turbine low pressure steam source pipe road motor-driven valve of feed pump turbine（6）Valve position numerical quantity：
Central processing unit controls the feed pump turbine low pressure steam source pipe road motor-driven valve of feed pump turbine（6）Valve position amount change
Become, i.e., current feed pump turbine feed pump turbine low pressure steam source pipe road motor-driven valve（6）Valve position numerical quantity is set plus feedwater
Mercury vapour turbine feed pump turbine low pressure steam source pipe road motor-driven valve（6）The valve position numerical quantity changed is needed, is exactly that back pressure numerical value is A
When, feed pump turbine feed pump turbine low pressure steam source pipe road motor-driven valve（6）Valve position numerical quantity.
2. the back of the body of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW according to claim 1
Press disturbance restraining method, it is characterised in that：The system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW
Middle feed pump turbine（18）Tripping operation back pressure be higher than Turbo-generator Set tripping operation back pressure, the full shipping row of Turbo-generator Set
Highest back pressure is 40 kPas, and minimum operation back pressure is 7 kPas, and highest allows longtime running back pressure to be less than 60 kPas, the tripping operation back of the body
Press as 65 kPas；Described feed pump turbine（18）Tripping operation back pressure be 75 kPas.
3. the overcritical in line air coolings of double extraction unit feed pump turbine of 350MW according to any one in claim 1~2
The interference suppressing method of the system on island, it is characterised in that：Determine the feed pump turbine low pressure vapour source of feed pump turbine
Electric valve for pipeline（6）The specific steps of valve position amount also include：Feed pump turbine low pressure steam source pipe road motor-driven valve（6）Valve position refer to
When order is more than 95%, at least one of following three kinds of methods of selection are used to improve feed pump turbine（18）Power, the first side
Method, central processing unit control feed pump turbine high-pressure steam source pipeline（4）On feed pump turbine high-pressure steam source pipeline it is electronic
Valve（5）Open so that feed pump turbine high-pressure steam source pipeline（4）For feed pump turbine（18）Input steam, increase feedwater
Mercury vapour turbine（18）The quantity of steam of input, to improve feed pump turbine（18）Power；Second method, central processing unit control
The electronic steam supply baffle plate that extraction steam for factories mouth is set（20）Certain aperture is closed, increases feed pump turbine（18）Pressure, to carry
High feed pump turbine（18）Power；The third method, the central processing unit control heating butterfly valve (15) that draws gas close certain aperture,
Increase feed pump turbine（18）Pressure, to improve feed pump turbine（18）Power.
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| CN101852105A (en) * | 2010-05-25 | 2010-10-06 | 山西省电力勘测设计院 | Steam exhaust direct-discharge system of feed pump turbine of direct air-cooling unit |
| EP2808500A1 (en) * | 2013-05-31 | 2014-12-03 | Siemens Aktiengesellschaft | Heat pump cycle with a first thermal fluid energy machine and a second thermal fluid energy machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852105A (en) * | 2010-05-25 | 2010-10-06 | 山西省电力勘测设计院 | Steam exhaust direct-discharge system of feed pump turbine of direct air-cooling unit |
| EP2808500A1 (en) * | 2013-05-31 | 2014-12-03 | Siemens Aktiengesellschaft | Heat pump cycle with a first thermal fluid energy machine and a second thermal fluid energy machine |
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| Title |
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| 给水泵汽轮机排汽直接进空冷岛技术在300MW供热机组中的应用;王旭勤等;《科技情报开发与经济》;20120310;第22卷(第5期);第118页第2栏第12行-第119页第1栏第1行 * |
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