CN110529207A - 630 DEG C of double reheat power generation sets therrmodynamic systems and its optimization method - Google Patents
630 DEG C of double reheat power generation sets therrmodynamic systems and its optimization method Download PDFInfo
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- CN110529207A CN110529207A CN201910943553.3A CN201910943553A CN110529207A CN 110529207 A CN110529207 A CN 110529207A CN 201910943553 A CN201910943553 A CN 201910943553A CN 110529207 A CN110529207 A CN 110529207A
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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
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/006—Auxiliaries or details not otherwise provided for
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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
- F01K19/00—Regenerating or otherwise treating steam exhausted from steam engine plant
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Abstract
The invention proposes a kind of 630 DEG C of double reheat power generation sets therrmodynamic systems, including boiler, the boiler side is provided with and communicated with ultra-high pressure cylinder, high pressure cylinder and intermediate pressure cylinder, medium pressure cylinder side is provided with and communicated with low pressure (LP) cylinder, the ultra-high pressure cylinder side is provided with and communicated with steam turbine, the steam turbine is connected to high pressure cylinder, the steam turbine side is provided with and communicated with high-pressure heater, the high-pressure heater is connected to boiler and ultra-high pressure cylinder respectively, the low pressure (LP) cylinder side is provided with and communicated with condenser, the condenser side is provided with and communicated with low-pressure heater, the low-pressure heater is connected to low pressure (LP) cylinder and intermediate pressure cylinder respectively, the first water pump is provided with and communicated between the condenser and low-pressure heater, the third water pump is connected to intermediate pressure cylinder, the present invention is not only able to reduce heat transfer temperature difference bring irreversible loss excessive in heater, and And cost can be reduced, improve the security reliability of unit.
Description
Technical field
The invention belongs to thermal power generating technology field, in particular to a kind of 630 DEG C of double reheat power generation sets therrmodynamic systems and its
Optimization method.
Background technique
Currently, the 1000MW double reheat power generation sets for being 35MPa/615 DEG C/630 DEG C/630 DEG C for parameter, since reheating is steamed
Stripping temperature is higher, and every section of steam extraction degree of superheat all greatly improves after reheating, and heat transfer temperature difference increases in corresponding bleeder heater, no
Reversible loss increases, this, which is just weakened, improves steam parameter bring income, and steam parameter is higher, this contradiction is more prominent.Work
Conventional reply method is in journey, and the part regenerative steam after reheating adds externally arranged steam cooler, suitably reduction backheat
The degree of superheat of steam extraction.
But with the raising of first mild reheat temperature, extraction temperature is consequently increased, externally arranged steam cooler and part
High-pressure heater need to select the material for adapting to higher temperature grade, and cost will increase dramatically, and therefore, spy provides 630 DEG C a kind of again
Double reheat power generation sets therrmodynamic system and its optimization method are not only able to reduce excessive in high-pressure heater or low-pressure heater
Heat transfer temperature difference bring irreversible loss, and cost can be reduced, improve the security reliability of unit.
Summary of the invention
The present invention proposes a kind of 630 DEG C of double reheat power generation sets therrmodynamic systems and its optimization method, be not only able to reduce plus
Excessive heat transfer temperature difference bring irreversible loss in hot device, and cost can be reduced, improve the security reliability of unit.
The technical scheme of the present invention is realized as follows: a kind of 630 DEG C of double reheat power generation sets therrmodynamic systems, including boiler,
Boiler side is provided with and communicated with ultra-high pressure cylinder, high pressure cylinder and intermediate pressure cylinder, and intermediate pressure cylinder side is provided with and communicated with low pressure (LP) cylinder, ultra-high pressure cylinder
Side is provided with and communicated with steam turbine, and steam turbine is connected to high pressure cylinder, and steam turbine side is provided with and communicated with high-pressure heater, and high pressure adds
Hot device is connected to boiler and ultra-high pressure cylinder respectively, and low pressure (LP) cylinder side is provided with and communicated with condenser, and condenser side is provided with and communicated with
Low-pressure heater, low-pressure heater are connected to low pressure (LP) cylinder and intermediate pressure cylinder respectively, and setting is connected between condenser and low-pressure heater
There is the first water pump, the second water pump is provided with and communicated in low-pressure heater, setting is connected between low-pressure heater and high-pressure heater
Have third water pump, third water pump is connected to intermediate pressure cylinder, be provided with and communicated with oxygen-eliminating device on third water pump, oxygen-eliminating device respectively with intermediate pressure cylinder
It is connected to steam turbine.
The steam generated in boiler enters in ultra-high pressure cylinder, and ultra-high pressure cylinder carries out the pressure of steam after decline processing
At three parts, a portion is transmitted back in boiler, a part is transmitted to another part in steam turbine and enters directly into high pressure
In heater；The vapor portion being sent in boiler can be passed in high pressure cylinder by boiler, pressure of the high pressure cylinder to steam again
Power carries out decline again and handles, and some vapor after processing is divided into two parts, a portion transmits again in back boiler,
Another part is sent in steam turbine；Some vapor in transmission back boiler is sent in intermediate pressure cylinder by boiler, intermediate pressure cylinder pair
The pressure of steam is adjusted, and the steam after adjusting is divided into two parts, a portion vapor transmission is interior, another to low pressure (LP) cylinder
Some vapor is passed in oxygen-eliminating device；The steam entered in low pressure (LP) cylinder is divided into three parts, and a portion is by low pressure (LP) cylinder
It carries out processing to convert thereof into mechanical energy transmission to generator, a part of steam is collected by condenser, another part
It is transferred in low-pressure heater；Condenser heats the vapor transmission being collected into low-pressure heater, is transferred to
A part of steam in low-pressure heater is also heated by low-temperature heater, and low-temperature heater arrives the vapor transmission after heating
In oxygen-eliminating device；It enters the steam in oxygen-eliminating device, the steam entered in oxygen-eliminating device in step 3 and enters in steam turbine
Steam is transferred in high-pressure heater simultaneously, and high-pressure heater handle to steam and steam is passed to pot by treated
In furnace；Boiler continues to handle the steam entered in boiler, and in the process, steam can circulate in several equipment
High-pressure heater is had respectively entered again later perhaps in low-pressure heater so that steam enters high-pressure heater or low pressure adds
Temperature in hot device is not too high to be damaged to high-pressure heater or low-pressure heater.
As a preferred embodiment, high-pressure heater includes No. 1 high-pressure heater interconnected, No. 2 high pressures
Heater, No. 3 high-pressure heaters, No. 4 high-pressure heaters, No. 5 high-pressure heaters and No. 6 high-pressure heaters, wherein No. 1 high pressure adds
Hot device is connected to boiler and ultra-high pressure cylinder respectively, steam turbine respectively with No. 2 high-pressure heaters, No. 3 high-pressure heaters, No. 4 high pressures
Heater, No. 5 high-pressure heaters and No. 6 high-pressure heater connections, third water pump is connected to No. 6 high-pressure heaters, so that steam
It can be carried out more thorough hyperbaric heating processing in high-pressure heater, so that the steam for entering boiler internal does not need again
Heating can save boiler heating air work done, reduce the energy of boiler consumption.
As a preferred embodiment, low-pressure heater includes No. 1 low-pressure heater interconnected, No. 2 low pressure
Heater, No. 3 low-pressure heaters and No. 4 low-pressure heaters, No. 1 low-pressure heater are connected to third water pump, and low pressure (LP) cylinder is respectively with 1
Number low-pressure heater, No. 2 low-pressure heaters, No. 3 low-pressure heaters and No. 4 low-pressure heaters connections, the connection of condenser side are set
It is equipped with No. 6 low-pressure heaters, No. 6 low-pressure heater sides are provided with and communicated with No. 5 low-pressure heaters, No. 5 low-pressure heaters and No. 4
Low-pressure heater connection, makes it possible to preferably heat the steam entered in low-pressure heater, so that steam exists
It is processed more thorough in low-pressure heater.
As a preferred embodiment, third water pump includes A water pump and B water pump, A water pump and No. 6 high-pressure heaters
Connection, B water pump are connected to No. 1 low-pressure heater, and oxygen-eliminating device includes the first oxygen-eliminating device and the second oxygen-eliminating device, the first oxygen-eliminating device difference
It is connected to A water pump, B water pump and steam turbine, the second oxygen-eliminating device is connected to B water pump, No. 1 low-pressure heater and intermediate pressure cylinder respectively, A water
Pump and B water pump are opened or are simultaneously closed off simultaneously, be can according to need and are opened A water pump and B water pump to control and enter
Steam flow in high-pressure heater saves the energy consumed in A water pump and B water pump practical process.
A kind of optimization method of 630 DEG C of double reheat power generation sets therrmodynamic systems, includes the following steps:
Step 1: the steam generated in boiler enters in ultra-high pressure cylinder, and ultra-high pressure cylinder carries out the pressure of steam at decline
At three parts after reason, a portion is transmitted back in boiler, a part is transmitted to another part in steam turbine and is directly entered
Into high-pressure heater；
Step 2: the vapor portion being sent in boiler in step 1 can be passed in high pressure cylinder by boiler, high pressure again
Cylinder carries out decline again to the pressure of steam and handles, and some vapor after processing is divided into two parts, a portion is again
Transmission back boiler is interior, another part is sent in steam turbine；
Step 3: some vapor transmitted in back boiler in step 2 is sent in intermediate pressure cylinder by boiler, and intermediate pressure cylinder is to steam
Pressure be adjusted, the steam after adjusting is divided into two parts, in a portion vapor transmission to low pressure (LP) cylinder, another part
Steam is passed in oxygen-eliminating device；
Step 4: the steam entered in low pressure (LP) cylinder in step 3 is divided into three parts, a portion by low pressure (LP) cylinder into
Row processing converts thereof into mechanical energy transmission to generator, and a part of steam is collected by condenser, another part quilt
It is transferred in low-pressure heater；
Step 5: condenser heats the vapor transmission being collected into low-pressure heater in step 4, is transferred to
A part of steam in low-pressure heater is also heated by low-temperature heater, and low-temperature heater arrives the vapor transmission after heating
In oxygen-eliminating device；
Step 6: entering steam and entrance in oxygen-eliminating device in the steam that is entered in oxygen-eliminating device in step 5, step 3
Steam in steam turbine is transferred in high-pressure heater simultaneously, and high-pressure heater handle and by treated to steam
Steam is passed in boiler；
Step 7: boiler continues to handle the steam entered in boiler.
After above-mentioned technical proposal, the beneficial effects of the present invention are:
1, the flowing by steam between the various devices can reduce the temperature for entering the steam in high-pressure heater
Degree, the high temperature risk for avoiding high-pressure heater from being subject to improve therrmodynamic system reliability；
2, the loss for reducing by first and second reheated steam flow, steam all in the process can adequately be collected, kept away
Exempt from steam flow it is excessive when, steam pressure increases bring security risk, while system side can be moved to avoid steam stream again,
It economizes on resources.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is flow diagram of the invention.
In figure, 1- boiler；2- ultra-high pressure cylinder；3- high pressure cylinder；4- intermediate pressure cylinder；5- low pressure (LP) cylinder；6- steam turbine；7- hyperbaric heating
Device；8- condenser；9- low-pressure heater；71-1 high-pressure heater；72-2 high-pressure heater；73-3 high-pressure heater；
74-4 high-pressure heater；75-5 high-pressure heater；76-6 high-pressure heater；The first water pump of 81-；The second water pump of 91-；
92- third water pump；93-1 low-pressure heater；94-2 low-pressure heater；95-3 low-pressure heater；96-4 low-pressure heating
Device；97-6 low-pressure heater；98-5 low-pressure heater；921-A water pump；922-B water pump；920- oxygen-eliminating device；9211- first
Oxygen-eliminating device；The second oxygen-eliminating device of 9221-.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in FIG. 1 to FIG. 2, a kind of 630 DEG C of double reheat power generation sets therrmodynamic systems, including boiler 1, the connection of 1 side of boiler
It is provided with ultra-high pressure cylinder 32, high pressure cylinder 32 and intermediate pressure cylinder 4,4 side of intermediate pressure cylinder is provided with and communicated with low pressure (LP) cylinder 5, ultra-high pressure cylinder 32 1
Side is provided with and communicated with steam turbine 6, and steam turbine 6 is connected to high pressure cylinder 32, and 6 side of steam turbine is provided with and communicated with high-pressure heater 7, high
Pressure heater 7 is connected to boiler 1 and ultra-high pressure cylinder 32 respectively, and 5 side of low pressure (LP) cylinder is provided with and communicated with condenser 8,8 side of condenser
It is provided with and communicated with low-pressure heater 9, low-pressure heater 9 is connected to low pressure (LP) cylinder 5 and intermediate pressure cylinder 4 respectively, condenser 8 and low-pressure heating
It is provided with and communicated with the first water pump 81 between device 9, the second water pump 91, low-pressure heater 9 and height are provided with and communicated in low-pressure heater 9
It is provided with and communicated with third water pump 92 between pressure heater 7, third water pump 92 is connected to intermediate pressure cylinder 4, and connection is set on third water pump 92
It is equipped with oxygen-eliminating device 920, oxygen-eliminating device 920 is connected to intermediate pressure cylinder 4 and steam turbine 6 respectively.
The steam generated in boiler 1 enters in ultra-high pressure cylinder 32, and ultra-high pressure cylinder 32 carries out the pressure of steam at decline
At three parts after reason, a portion is transmitted back in boiler 1, a part be transmitted in steam turbine 6 another part directly into
Enter into high-pressure heater 7；The vapor portion being sent in boiler 1 can be passed in high pressure cylinder 3 by boiler 1, high pressure again
Cylinder 3 carries out decline again to the pressure of steam and handles, and some vapor after processing is divided into two parts, a portion is again
Transmission back boiler 1 is interior, another part is sent in steam turbine 6；Some vapor in transmission back boiler 1 is sent to by boiler 1
In intermediate pressure cylinder 4, the pressure of steam is adjusted in intermediate pressure cylinder 4, and the steam after adjusting is divided into two parts, a portion steam
It is transferred in low pressure (LP) cylinder 5, another part steam is passed in oxygen-eliminating device；The steam entered in low pressure (LP) cylinder 5 is divided into three
Point, a portion carries out processing by low pressure (LP) cylinder 5 and converts thereof into mechanical energy transmission to generator, and a part of steam is by condensing
Device 8 is collected, and another part is transferred in low-pressure heater 9；Condenser 8 adds the vapor transmission being collected into low pressure
It is heated in hot device 9, a part of steam being transferred in low-pressure heater 9 is also heated by low-temperature heater, low temperature
Heater will be in the vapor transmission to oxygen-eliminating device after heating；It enters the steam in oxygen-eliminating device, entered in oxygen-eliminating device in step 3
Steam and the steam that enters in steam turbine 6 while being transferred in high-pressure heater 7, high-pressure heater 7 to steam into
Row is handled and steam is passed in boiler 1 by treated；Boiler 1 continues to handle the steam entered in boiler 1, In
During this, steam has respectively entered high-pressure heater 7 or low-pressure heater 9 after circulating in several equipment again
It is interior so that steam enter the temperature in high-pressure heater 7 or low-pressure heater 9 it is not too high to high-pressure heater 7 or
Low-pressure heater 9 damages.
High-pressure heater 7 includes the hyperbaric heating of high-pressure heater 72,3 of No. 1 high-pressure heater 71,2 interconnected
High-pressure heater 75 and No. 6 high-pressure heater 76 of high-pressure heater 74,5 of device 73,4, wherein No. 1 high-pressure heater 71 is distinguished
Be connected to boiler 1 and ultra-high pressure cylinder 32, steam turbine 6 respectively with No. 2 high pressures of high-pressure heater 73,4 of high-pressure heater 72,3
74, No. 5 high-pressure heater 75 and No. 6 high-pressure heaters 76 of heater are connected to, and third water pump 92 and No. 6 high-pressure heater 76 connects
It is logical, so that steam can be carried out more thorough hyperbaric heating processing in high-pressure heater 7, so that entering inside boiler 1
Steam does not need to reheat, and can save boiler 1 and heat air work done, reduces the energy that boiler 1 consumes.
Low-pressure heater 9 includes the low-pressure heating of low-pressure heater 94,3 of No. 1 low-pressure heater 93,2 interconnected
96, No. 1 low-pressure heater 93 of device 95 and No. 4 low-pressure heater is connected to third water pump 92, and low pressure (LP) cylinder 5 adds with No. 1 low pressure respectively
Low-pressure heater 95 and No. 4 low-pressure heater 96 of low-pressure heater 94,3 of hot device 93,2 is connected to, and the connection of 8 side of condenser is set
It is equipped with 97, No. 6 97 sides of low-pressure heater of No. 6 low-pressure heaters and is provided with and communicated with 98, No. 5 low-pressure heatings of No. 5 low-pressure heaters
Device 98 and No. 4 low-pressure heater 96 is connected to, and makes it possible to preferably carry out at heating the steam entered in low-pressure heater 9
Reason, so that steam is processed more thorough in low-pressure heater 9.
Third water pump 92 includes A water pump 921 and B water pump 922, and A water pump 921 and No. 6 high-pressure heater 76 is connected to, B water pump
922 are connected to No. 1 low-pressure heater 93.Oxygen-eliminating device 920 includes the first oxygen-eliminating device 9211 and the second oxygen-eliminating device 9221, the first deoxygenation
Device 9211 is connected to A water pump 921, B water pump 922 and steam turbine 6 respectively, and the second oxygen-eliminating device 9221 is low with B water pump 922,1 respectively
Pressure heater 93 is connected to intermediate pressure cylinder 4, and A water pump 921 and B water pump 922 are opened or simultaneously closed off simultaneously, A water pump 921 and B water
Pump 922 is opened or is simultaneously closed off simultaneously, be can according to need and is opened A water pump 921 and B water pump 922 to control entrance
To the steam flow in high-pressure heater 7, the energy consumed in A water pump 921 and 922 practical process of B water pump is saved.
A kind of optimization method of 630 DEG C of double reheat power generation sets therrmodynamic systems, includes the following steps:
Step 1: the steam generated in boiler 1 enters in ultra-high pressure cylinder 32, and ultra-high pressure cylinder 32 carries out the pressure of steam
At three parts after decline processing, a portion is transmitted back in boiler 1, a part is transmitted to another part in steam turbine 6
It enters directly into high-pressure heater 7；
Step 2: the vapor portion being sent in boiler 1 in step 1 can be passed in high pressure cylinder 3 by boiler 1 again,
High pressure cylinder 3 carries out decline again to the pressure of steam and handles, and some vapor after processing is divided into two parts, a portion
It is transmitted in back boiler 1 again, another part is sent in steam turbine 6；
Step 3: some vapor transmitted in back boiler 1 in step 2 is sent in intermediate pressure cylinder 4 by boiler 1, and intermediate pressure cylinder 4 is right
The pressure of steam is adjusted, and the steam after adjusting is divided into two parts, a portion vapor transmission is interior to low pressure (LP) cylinder 5, another
A part of steam is passed in oxygen-eliminating device；
Step 4: the steam entered in low pressure (LP) cylinder 5 in step 3 is divided into three parts, and a portion is by low pressure (LP) cylinder 5
It carries out processing to convert thereof into mechanical energy transmission to generator, a part of steam is collected by condenser 8, another part
It is transferred in low-pressure heater 9；
Step 5: condenser 8 heats the vapor transmission being collected into low-pressure heater 9 in step 4, is transmitted
A part of steam in low-pressure heater 9 is also heated by low-temperature heater, and low-temperature heater passes the steam after heating
It is defeated in oxygen-eliminating device；
Step 6: entering steam and entrance in oxygen-eliminating device in the steam that is entered in oxygen-eliminating device in step 5, step 3
It is transferred in high-pressure heater 7 simultaneously to the steam in steam turbine 6, high-pressure heater 7 carries out processing to steam and will processing
Steam afterwards is passed in boiler 1；
Step 7: boiler 1 continues to handle the steam entered in boiler 1.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of 630 DEG C of double reheat power generation sets therrmodynamic systems, which is characterized in that including boiler, the boiler side connection setting
There are ultra-high pressure cylinder, high pressure cylinder and intermediate pressure cylinder, medium pressure cylinder side is provided with and communicated with low pressure (LP) cylinder, the ultra-high pressure cylinder side connection
It is provided with steam turbine, the steam turbine is connected to high pressure cylinder, and the steam turbine side is provided with and communicated with high-pressure heater, the height
Pressure heater is connected to boiler and ultra-high pressure cylinder respectively, and the low pressure (LP) cylinder side is provided with and communicated with condenser, the condenser one
Side is provided with and communicated with low-pressure heater, and the low-pressure heater is connected to low pressure (LP) cylinder and intermediate pressure cylinder respectively, the condenser with it is low
It is provided with and communicated with the first water pump between pressure heater, the second water pump is provided with and communicated in the low-pressure heater, the low pressure adds
Third water pump is provided with and communicated between hot device and high-pressure heater, the third water pump is connected to intermediate pressure cylinder, the third water pump
On be provided with and communicated with oxygen-eliminating device, the oxygen-eliminating device is connected to intermediate pressure cylinder and steam turbine respectively.
2. 630 ° of double reheat power generation sets therrmodynamic systems according to claim 1, which is characterized in that the high-pressure heater packet
No. 1 high-pressure heater interconnected, No. 2 high-pressure heaters, No. 3 high-pressure heaters, No. 4 high-pressure heaters, No. 5 high pressures are included to add
Hot device and No. 6 high-pressure heaters, wherein No. 1 high-pressure heater is connected to boiler and ultra-high pressure cylinder respectively, the steam turbine difference
It is connected to No. 2 high-pressure heaters, No. 3 high-pressure heaters, No. 4 high-pressure heaters, No. 5 high-pressure heaters and No. 6 high-pressure heaters,
The third water pump is connected to No. 6 high-pressure heaters.
3. 630 DEG C of double reheat power generation sets therrmodynamic systems according to claim 2, which is characterized in that the low-pressure heater
Including No. 1 low-pressure heater, No. 2 low-pressure heaters, No. 3 low-pressure heaters and No. 4 low-pressure heaters interconnected, described 1
Number low-pressure heater is connected to third water pump, the low pressure (LP) cylinder respectively with No. 1 low-pressure heater, No. 2 low-pressure heaters, No. 3 it is low
Heater and No. 4 low-pressure heater connections are pressed, the condenser side is provided with and communicated with No. 6 low-pressure heaters, No. 6 low pressure
Heater side is provided with and communicated with No. 5 low-pressure heaters, and No. 5 low-pressure heaters are connected to No. 4 low-pressure heaters.
4. 630 DEG C of double reheat power generation sets therrmodynamic systems according to claim 3, which is characterized in that third water pump includes A water
Pump and B water pump, the A water pump are connected to No. 6 high-pressure heaters, and the B water pump is connected to No. 1 low-pressure heater.
5. 630 DEG C of double reheat power generation sets therrmodynamic systems according to claim 4, which is characterized in that the oxygen-eliminating device includes
First oxygen-eliminating device and the second oxygen-eliminating device, first oxygen-eliminating device are connected to A water pump, B water pump and steam turbine respectively, and described second removes
Oxygen device is connected to B water pump, No. 1 low-pressure heater and intermediate pressure cylinder respectively.
6. 630 DEG C of double reheat power generation sets therrmodynamic systems according to claim 4, which is characterized in that the A water pump and B water
It pumps while opening or simultaneously closing off.
7. a kind of optimization method of 630 as described in claim 1~6 DEG C double reheat power generation sets therrmodynamic system, which is characterized in that
Include the following steps:
Step 1: the steam generated in boiler enters in ultra-high pressure cylinder, and the pressure of steam is carried out decline processing by ultra-high pressure cylinder
Afterwards at three parts, a portion is transmitted back in boiler, a part is transmitted to another part in steam turbine and enters directly into height
It presses in heater；
Step 2: the vapor portion being sent in boiler in step 1 can be passed in high pressure cylinder by boiler, high pressure cylinder pair again
The pressure of steam carries out decline again and handles, and some vapor after processing is divided into two parts, a portion is transmitted again
Back boiler is interior, another part is sent in steam turbine；
Step 3: some vapor transmitted in back boiler in step 2 is sent in intermediate pressure cylinder by boiler, pressure of the intermediate pressure cylinder to steam
Power is adjusted, and the steam after adjusting is divided into two parts, a portion vapor transmission interior, another part steam to low pressure (LP) cylinder
It is passed in oxygen-eliminating device；
Step 4: the steam entered in low pressure (LP) cylinder in step 3 is divided into three parts, and a portion is by low pressure (LP) cylinder
Reason converts thereof into mechanical energy transmission to generator, and a part of steam is collected by condenser, and another part is transmitted
Into low-pressure heater；
Step 5: condenser heats the vapor transmission being collected into low-pressure heater in step 4, is transferred to low pressure
A part of steam in heater is also heated by low-temperature heater, and low-temperature heater is by the vapor transmission after heating to deoxygenation
In device；
Step 6: entering the steam in oxygen-eliminating device in the steam that is entered in oxygen-eliminating device in step 5, step 3 and enter vapour
Steam in turbine is transferred in high-pressure heater simultaneously, and high-pressure heater handle to steam and will treated steam
It is passed in boiler；
Step 7: boiler continues to handle the steam entered in boiler.
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