CN107355267A - The double back pressure systems of steam feed pump and its control method - Google Patents
The double back pressure systems of steam feed pump and its control method Download PDFInfo
- Publication number
- CN107355267A CN107355267A CN201710571075.9A CN201710571075A CN107355267A CN 107355267 A CN107355267 A CN 107355267A CN 201710571075 A CN201710571075 A CN 201710571075A CN 107355267 A CN107355267 A CN 107355267A
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- China
- Prior art keywords
- back pressure
- steam
- feed pump
- valve
- section
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- 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
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
-
- 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
-
- 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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The invention discloses a kind of double back pressure systems of steam feed pump and its control method, system is provided with into vapour section, acting section and steam discharge section including back pressure turbine, the extraction opening for entering vapour section with vapour source equipment is connected, acting section has the rotor that can be run in back pressure ranges, back pressure ranges are the back pressure value of the first back pressure value~second, first back pressure value all drains into back pressure during condenser for the steam discharge of back pressure turbine, and the second back pressure value all drains into back pressure during heat exchangers for district heating for the steam discharge of back pressure turbine；The acting section of steam feed pump and back pressure turbine connects；Condenser is connected by the first pipeline with steam discharge section, and the first valve is set on the first pipeline；Heat exchangers for district heating is connected by second pipe with steam discharge section, and the second valve is set on second pipe.Control method is included in Heating Period and opens the second valve the first valve of closing, in non-heating period, opens the first valve and closes the second valve.The present invention can effectively reduce cold end loss, reach energy-saving purpose.
Description
Technical field
The invention belongs to industrial back pressure turbine heat supply process field, the double back pressure systems of more particularly to a kind of steam feed pump
And its control method.
Background technology
Current domestic more than 300MW units steam feed pump uses steam feed pump more, and the vapour source of steam feed pump is big
Four sections of machine draw gas, and steam discharge drains into big machine condenser, and there is very big cold source energy.Steam discharge increases into condenser simultaneously
Condenser duty, it have impact on big engine efficiency.
The content of the invention
In order to solve the above problems, one aspect of the present invention provides a kind of double back pressure systems of steam feed pump, and it includes：The back of the body
Press steam turbine, steam feed pump, heat exchangers for district heating and condenser；The back pressure turbine is provided with into vapour section, acting section and steam discharge
Section, it is described enter vapour section be connected with the extraction opening of vapour source equipment, the section of doing work is with the rotor that can be run in back pressure ranges, institute
Back pressure ranges are stated as the back pressure value of the first back pressure value~second, first back pressure value is all arranged for the steam discharge of the back pressure turbine
To the back pressure during condenser, second back pressure value all drains into the heat supply network heating for the steam discharge of the back pressure turbine
Back pressure during device；The steam feed pump is connected with the acting section of the back pressure turbine to be dragged by the back pressure turbine；
The condenser is connected by the first pipeline with the steam discharge section of the back pressure turbine, and the first valve is set on first pipeline
Door；The heat exchangers for district heating is connected by second pipe with the steam discharge section of the back pressure turbine, is set on the second pipe
Put the second valve.
In the double back pressure systems of steam feed pump as described above, it is preferable that the extraction opening output of the vapour source equipment
Draw gas four sections for large capacity turbine and draw gas.
In the double back pressure systems of steam feed pump as described above, it is preferable that the first back pressure value is 6kpa, the second back pressure value
For 55kpa.
Another aspect of the present invention provides a kind of control method of the double back pressure systems of steam feed pump, the double back ofs the body of steam feed pump
Pressure system is the double back pressure systems of above-mentioned steam feed pump, and it includes：In non-heating period, the first valve is opened so that the condensing
Device puts into operation, closes second valve so that the heat exchangers for district heating is out of service, so as to realize the complete of back pressure turbine
Portion's steam discharge drains into the condenser, and the steam feed pump is run under the first back pressure value；In Heating Period, described first is closed
Valve is so that the condenser is out of service, and opening second valve is so that the heat exchangers for district heating puts into operation, so as to real
Whole steam discharges of existing back pressure turbine drain into the heat exchangers for district heating, and steam feed pump runs under the second back pressure value, realized
Steam feed pump is run under high back pressure.
What Pass through above-mentioned technical proposal of the embodiment of the present invention was brought has the beneficial effect that：
(it is that Heating Period is also non-heating by making rotor in back pressure ranges internal rotation, and according to the difference of operating condition
Phase), the steam discharge of back pressure turbine is drained into condenser or heat exchangers for district heating respectively, especially in Heating Period by back pressure turbine
Steam discharge drains into heat exchangers for district heating, so as to effectively reduce cold end loss, reduces the thermic load of condenser, improves big machine effect
Rate, net coal consumption rate is reduced, reached energy-saving purpose.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the double back pressure systems of steam feed pump provided in an embodiment of the present invention.
Symbol description is as follows in figure：
1 back pressure turbine, 2 steam feed pumps, 3 condensers, 4 heat exchangers for district heatings, 5 first valves, 6 first pipelines, 7 second
Valve, 8 second pipes.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Referring to Fig. 1, the embodiments of the invention provide a kind of double back pressure systems of steam feed pump, it includes：Back pressure turbine,
Steam feed pump, heat exchangers for district heating and condenser.
Driving source of the back pressure turbine as steam feed pump, come from drawing gas for vapour source equipment for reception processing, and
Externally do work so that steam feed pump rotates, it is provided with into vapour section, acting section and steam discharge section.Enter drawing gas for vapour section and vapour source equipment
Mouthful connection is drawn gas with receiving, and four sections of the preferably large capacity turbine (or big machine) of drawing gas draw gas.Acting section has and can carried on the back
The rotor of operation (rotating), back pressure ranges A value are in the range of pressure：The back pressure value of first back pressure value B≤A≤second C, first
Back pressure value all drains into back pressure during condenser for the steam discharge of back pressure turbine, and such as 6kpa, the second back pressure value is back pressure turbine
Back pressure of steam discharge when all draining into heat exchangers for district heating, such as 55kpa, so realize the through-flow and high back pressure to back pressure turbine
Transform, in practical application, in order that rotor can be carried out in back pressure ranges internal rotation to length, the direction of the blade of rotor
Transformation.Draw gas and exported after the acting section acting of back pressure turbine by steam discharge section.In other examples, vapour source equipment can
Think power plant power generation turbine, such as high-pressure turbine, middle-pressure steam turbine, can also be boiler, the present embodiment to this not
It is defined.
Steam feed pump, which is used to convey, to be fed water, and it is dragged by back pressure turbine.
Condenser is used for after non-heating period reception back pressure turbine acting the whole steam discharges discharged, and steam discharge is become into solidifying
Bear water, it is connected by the steam discharge section of the first pipeline and back pressure turbine, and the first valve is set on the first pipeline.The condenser
It can be the condenser of big machine.
Heat exchangers for district heating is used for after Heating Period reception back pressure turbine acting the whole steam discharges discharged, and utilizes the steam discharge
Heat supply network recirculated water in heat exchangers for district heating is heated using as heat source, it passes through the steam discharge section of second pipe and back pressure turbine
Connection, sets the second valve on second pipe.
The control method of the system is illustrated below：
In non-heating period, the first valve is opened, then condenser puts into operation, and the second valve is closed, then heat exchangers for district heating
Out of service, now whole steam discharges of back pressure turbine drain into condenser, and back pressure turbine is run under the first back pressure value, and first
Back pressure value can be 6kpa, and steam feed pump is run in 6kpa.
In Heating Period, the first valve is closed, then condenser is out of service, and the second valve is opened, then heat exchangers for district heating is thrown
Enter operation, now whole steam discharges of back pressure turbine drain into heat exchangers for district heating, and back pressure turbine is run under the second back pressure value, the
Two back pressure values can be 55kpa, and steam feed pump runs in 55kpa, realizes steam feed pump and run under high back pressure.
By the present invention in that rotor is in back pressure ranges internal rotation, and according to the difference of operating condition (be Heating Period still
Non-heating period), the steam discharge of back pressure turbine is drained into condenser or heat exchangers for district heating respectively, so as to effectively reduce cold end loss,
Reach energy-saving purpose simultaneously.
Preferably, the double back pressure systems of steam feed pump also include first flow control valve, second flow control valve and control
Device.First flow control valve is provided with the first pipeline, it is connected with control device, to be controlled according to the instruction of control device
Back pressure turbine conveys the quantity of steam of condenser.Second flow control valve is provided with second pipe, it connects with control device
Connect with the quantity of steam of the instruction control back pressure turbine conveying heat exchangers for district heating according to control device.Control device is also with first
Valve and the connection of the second valve, the first valve is closed and the second valve is opened to be controlled in Heating Period, in non-heating period control the
One valve is opened and the second valve closes the adjust automatically for realizing operating condition.
In summary, what the embodiment of the present invention was brought has the beneficial effect that：
(it is that Heating Period is also non-heating by making rotor in back pressure ranges internal rotation, and according to the difference of operating condition
Phase), the steam discharge of back pressure turbine is drained into condenser or heat exchangers for district heating respectively, especially in Heating Period by back pressure turbine
Steam discharge drains into heat exchangers for district heating, so as to effectively reduce cold end loss, reduces the thermic load of condenser, improves big machine effect
Rate, net coal consumption rate is reduced, reached energy-saving purpose.
As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature
Case is realized.Therefore, embodiment disclosed above, for each side, all it is merely illustrative, is not only.Institute
Have within the scope of the present invention or be included in the invention in the change being equal in the scope of the present invention.
Claims (4)
1. the double back pressure systems of a kind of steam feed pump, it is characterised in that the double back pressure systems of the steam feed pump include：Back pressure steam
Turbine, steam feed pump, heat exchangers for district heating and condenser；
The back pressure turbine is provided with into vapour section, acting section and steam discharge section, it is described enter vapour section be connected with the extraction opening of vapour source equipment,
The acting section has the rotor that can be run in back pressure ranges, and the back pressure ranges are the back pressure value of the first back pressure value~second,
First back pressure value all drains into the back pressure during condenser, second back pressure value for the steam discharge of the back pressure turbine
Back pressure when all draining into the heat exchangers for district heating for the steam discharge of the back pressure turbine；
The steam feed pump is connected with the acting section of the back pressure turbine to be dragged by the back pressure turbine；
The condenser is connected by the first pipeline with the steam discharge section of the back pressure turbine, and is set on first pipeline
One valve；
The heat exchangers for district heating is connected by second pipe with the steam discharge section of the back pressure turbine, is set on the second pipe
Put the second valve.
2. the double back pressure systems of steam feed pump according to claim 1, it is characterised in that the extraction opening of the vapour source equipment
Four sections drawn gas as large capacity turbine of output draw gas.
3. the double back pressure systems of steam feed pump according to claim 1, it is characterised in that the first back pressure value is 6kpa, the
Two back pressure values are 55kpa.
4. a kind of control method of the double back pressure systems of steam feed pump based on described in any one of claims 1 to 3, its feature exist
In the control method includes：
In non-heating period, the first valve is opened so that the condenser puts into operation, closing second valve is so that described
Heat exchangers for district heating is out of service, so as to realize that whole steam discharges of back pressure turbine drain into the condenser, the steam feed pump
Run under the first back pressure value；
In Heating Period, first valve is closed so that the condenser is out of service, opening second valve is so that institute
State heat exchangers for district heating to put into operation, so as to realize that whole steam discharges of back pressure turbine drain into the heat exchangers for district heating, steam-operating feedwater
Pump is run under the second back pressure value, is realized steam feed pump and is run under high back pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571075.9A CN107355267A (en) | 2017-07-13 | 2017-07-13 | The double back pressure systems of steam feed pump and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571075.9A CN107355267A (en) | 2017-07-13 | 2017-07-13 | The double back pressure systems of steam feed pump and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107355267A true CN107355267A (en) | 2017-11-17 |
Family
ID=60293598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710571075.9A Pending CN107355267A (en) | 2017-07-13 | 2017-07-13 | The double back pressure systems of steam feed pump and its control method |
Country Status (1)
| Country | Link |
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| CN (1) | CN107355267A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441552A (en) * | 2018-09-10 | 2019-03-08 | 东方电气集团东方汽轮机有限公司 | A kind of overbottom pressure utilizes system using steam turbine and overbottom pressure |
| CN110631317A (en) * | 2019-09-27 | 2019-12-31 | 国电龙源节能技术有限公司上海分公司 | Water storage and discharge system based on closed type circulating cooling system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4330997A (en) * | 1978-11-09 | 1982-05-25 | Bbc Brown, Boveri & Company, Ltd. | Feedwater heating in a steam turbine |
| CN203114363U (en) * | 2013-01-08 | 2013-08-07 | 山东泓奥电力科技有限公司 | Large thermal generator set high back pressure circulating water heat supplying energy-saving system |
| CN204554950U (en) * | 2015-03-26 | 2015-08-12 | 河北省电力勘测设计研究院 | The steam supply of high back pressure thermal power plant unit and cooling system |
| CN105952505A (en) * | 2016-04-27 | 2016-09-21 | 华电电力科学研究院 | Thermal power plant small steam turbine energy step utilization system and method thereof |
| CN207004587U (en) * | 2017-07-13 | 2018-02-13 | 国电龙源节能技术有限公司 | The double back pressure systems of steam feed pump |
-
2017
- 2017-07-13 CN CN201710571075.9A patent/CN107355267A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4330997A (en) * | 1978-11-09 | 1982-05-25 | Bbc Brown, Boveri & Company, Ltd. | Feedwater heating in a steam turbine |
| CN203114363U (en) * | 2013-01-08 | 2013-08-07 | 山东泓奥电力科技有限公司 | Large thermal generator set high back pressure circulating water heat supplying energy-saving system |
| CN204554950U (en) * | 2015-03-26 | 2015-08-12 | 河北省电力勘测设计研究院 | The steam supply of high back pressure thermal power plant unit and cooling system |
| CN105952505A (en) * | 2016-04-27 | 2016-09-21 | 华电电力科学研究院 | Thermal power plant small steam turbine energy step utilization system and method thereof |
| CN207004587U (en) * | 2017-07-13 | 2018-02-13 | 国电龙源节能技术有限公司 | The double back pressure systems of steam feed pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441552A (en) * | 2018-09-10 | 2019-03-08 | 东方电气集团东方汽轮机有限公司 | A kind of overbottom pressure utilizes system using steam turbine and overbottom pressure |
| CN110631317A (en) * | 2019-09-27 | 2019-12-31 | 国电龙源节能技术有限公司上海分公司 | Water storage and discharge system based on closed type circulating cooling system |
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