CN108049922A - A kind of width operating mode double reheat two-shipper heat regenerative system - Google Patents
A kind of width operating mode double reheat two-shipper heat regenerative system Download PDFInfo
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- CN108049922A CN108049922A CN201810013982.6A CN201810013982A CN108049922A CN 108049922 A CN108049922 A CN 108049922A CN 201810013982 A CN201810013982 A CN 201810013982A CN 108049922 A CN108049922 A CN 108049922A
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- 230000001172 regenerating effect Effects 0.000 title claims abstract description 68
- 238000000605 extraction Methods 0.000 claims abstract description 118
- 230000002209 hydrophobic effect Effects 0.000 claims description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 63
- 238000010438 heat treatment Methods 0.000 claims description 35
- 238000001816 cooling Methods 0.000 claims description 21
- 238000009833 condensation Methods 0.000 claims description 19
- 230000005494 condensation Effects 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 5
- 238000006392 deoxygenation reaction Methods 0.000 claims description 2
- 238000010248 power generation Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Classifications
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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
- F01K7/16—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 only of turbine type
- F01K7/18—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 only of turbine type the turbine being of multiple-inlet-pressure type
-
- 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
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- 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
- F01K7/34—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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
- F22D1/325—Schematic arrangements or control devices therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
- F22D1/34—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines and returning condensate to boiler with main feed supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention proposes a kind of wide operating mode double reheat two-shipper heat regenerative system for belonging to thermal power generation system field, which includes the equipment such as boiler, steam turbine, condenser, bleeder heater, generator, pump and pipeline.Wherein turbine system includes a high pressure cylinder, two intermediate pressure cylinders and two low pressure (LP) cylinders, also has the low pressure (LP) cylinder of backheat steam turbine and backheat steam turbine, and condenser system includes main condenser and auxiliary condenser.High pressure cylinder of the steam extraction of backheat steam turbine from steam turbine, it is equipped with 6 grades of steam extractions, and steam discharge is introduced into respectively in bleeder heaters at different levels, and the steam discharge of backheat steam turbine enters the low pressure (LP) cylinder of its postposition, the steam discharge of backheat turbine low pressure cylinder enters in auxiliary condenser, is imported into afterwards in main condenser.The present invention solves the problems, such as that the bleeder heater steam extraction degree of superheat is excessive, while improves the flow efficiency of intermediate pressure cylinder；On the basis of the cycle efficieny of unit is improved, economy and practicability are enhanced.
Description
Patent field
The present invention relates to a kind of thermal power generation systems, and in particular to a kind of double reheat two-shipper heat regenerative system.
Background technology
At present, the direction of China's fired power generating unit towards large capacity, high parameter is developed, and main steam pressure has reached at present
28MPa, 620 DEG C of advanced international standard, it is the effective technical way realized improved efficiency, economized on resources to improve steam parameter,
But present 700 DEG C of grade high-temperature materials of steam power plant can not also be commercialized utilization, so fiery in a short time also among development
Motor group cannot temporarily reach higher parameter.
In order to further improve the cycle efficieny of unit, the development of ultra supercritical double reheat technology opens new side
The mean temperature of steam heat absorption can be further improved to, double reheat technology, under identical temperature conditionss, compared to once again
Thermal technology can improve efficiency 2%~3%.But since double reheat power generation sets main steam temperature and reheat steam temperature are very high, go out
Show the problem of heat regenerative system steam extraction degrees of superheat at different levels are very big, and the steam extraction overheated in these heat regenerative system bleeder heaters comes from
In Steam Turbine Through IP Admission, the energy consumption of double reheat power generation sets is increased, hinders further improving for double reheat power generation sets efficiency；Cause
This is badly in need of a kind of new system to solve that the bleeder heater steam extraction degree of superheat is excessive and unit is asked low operating mode operational effect is bad
Topic.
According to the peak regulation environment of reality, double reheat power generation sets will not be run always under full capacity, and double reheat power generation sets exist
Under the conditions of variable parameter operation in the prevalence of adaptability it is bad the problem of, under design conditions, double reheat power generation sets steam turbine low-pressure
Cylinder blade is longer, when running on the lower load is run, since the steam flow of turbine low pressure cylinder becomes smaller, and the fortune of turbine low pressure cylinder
Row effect is deteriorated, this all causes very big influence to the performance of double reheat power generation sets and safe operation.
The content of the invention
In view of the above-mentioned problems of the prior art, it is proposed that a kind of width operating mode double reheat two-shipper heat regenerative system, it is special
Sign is, including：Boiler, steam turbine high-pressure cylinder, steam turbine first stage intermediate pressure cylinder, steam turbine second level intermediate pressure cylinder, steam turbine
Level-one low pressure (LP) cylinder, steam turbine second level low pressure (LP) cylinder, backheat steam turbine, backheat turbine low pressure cylinder, generator, auxiliary condenser, master
Condenser and heat regenerative system；
The air intake order of the wherein feedwater outlet of heat regenerative system, boiler and steam turbine high-pressure cylinder is connected, turbine high-pressure
The steam drain of cylinder respectively with the air intake of backheat steam turbine, the air intake of steam turbine first stage intermediate pressure cylinder and heat regenerative system first
Air intake is connected, and the venthole of steam turbine first stage intermediate pressure cylinder is connected with the air intake of steam turbine second level intermediate pressure cylinder, the second level
Intermediate pressure cylinder arranges that every side of symmetrical flow division is respectively equipped with a steam drain for symmetrical flow division, and two steam drains divide after converging
It flows and the air intake with the air intake of steam turbine first stage low pressure (LP) cylinder and steam turbine second level low pressure (LP) cylinder is connected respectively, steam turbine the
Level-one low pressure (LP) cylinder and steam turbine second level low pressure (LP) cylinder arrange that every one side of wherein symmetrical flow division arrangement is all provided with using symmetrical flow division
There are two extraction opening and a steam drain, two steam drains of steam turbine first stage low pressure (LP) cylinder and steam turbine second level low pressure (LP) cylinder converge
Air intake after conjunction with main condenser is connected, two steam turbine first stage low pressure (LP) cylinders of the symmetrical flow division arrangement of first order low pressure (LP) cylinder
Second extraction opening is connected after converging with the 9th air intake of heat regenerative system, two of the symmetrical flow division arrangement of second level low pressure (LP) cylinder
The steam turbine second level the second extraction opening of low pressure (LP) cylinder is connected with the tenth air intake of heat regenerative system, and steam turbine first stage low pressure (LP) cylinder is symmetrical
What two the first extraction openings of steam turbine first stage low pressure (LP) cylinder and steam turbine second level low pressure (LP) cylinder symmetrical flow division of shunting arrangement were arranged
The two steam turbine second level the first extraction openings of low pressure (LP) cylinder converge to be connected afterwards with the 8th air intake of heat regenerative system；
The backheat steam turbine is set there are five extraction opening and a steam drain；Five extraction openings are first order steam extraction respectively
Mouth, second level extraction opening, third level extraction opening, fourth stage extraction opening and level V extraction opening, wherein first order extraction opening are with returning
The second air intake of hot systems is connected, and second level extraction opening is connected with the 3rd air intake of heat regenerative system, third level extraction opening and backheat
The 4th air intake of system is connected, and fourth stage extraction opening is connected with the 5th air intake of heat regenerative system, level V extraction opening and backheat system
The 6th air intake of uniting is connected；The steam drain of backheat steam turbine is connected with the air intake of backheat turbine low pressure cylinder, backheat steam turbine
The steam drain of low pressure (LP) cylinder is connected with the air intake of auxiliary condenser, the hydrophobic outlet of the condensation water out, heat regenerative system of auxiliary condenser
Converge with the condensation water out of main condenser and be connected afterwards with the condensation water inlet of heat regenerative system；Backheat turbine low pressure cylinder is installed on
After backheat steam turbine, the rotor of backheat turbine low pressure cylinder is connected with the rotor of generator in its rear.
The heat regenerative system is by first order high-pressure heater, second level high-pressure heater, third level high-pressure heater, the 4th
Grade high-pressure heater, oxygen-eliminating device, the 6th grade of low-pressure heater, the 7th grade of low-pressure heater, the 8th grade of low-pressure heater, the 9th grade
Low-pressure heater, the tenth grade of low-pressure heater, feed pump, drainage pump and condensate pump composition；The first to the tenth of heat regenerative system
Air intake respectively is the air intake of first order high-pressure heater, the air intake of second level high-pressure heater, third level high pressure
The air intake of heater, the air intake of fourth stage high-pressure heater, the air intake of oxygen-eliminating device, the 6th grade of low-pressure heater into vapour
Mouthful, the air intake of the air intake of the 7th grade of low-pressure heater, the 8th grade of low-pressure heater, the 9th grade of low-pressure heater into vapour
Mouthful, the air intake of the tenth grade of low-pressure heater, the condensation water inlet of heat regenerative system is the entrance of condensate pump, and heat regenerative system is given
Water out is the feedwater outlet of first order high-pressure heater, the hydrophobic outlet of the 9th grade of low-pressure heater and the tenth grade of low-pressure heating
The hydrophobic outlet of device becomes the hydrophobic outlet of heat regenerative system after converging；The wherein hydrophobic outlet and second of first order high-pressure heater
The hydrophobic entrance connection of grade high-pressure heater, the hydrophobic outlet of second level high-pressure heater are hydrophobic with third level high-pressure heater
Entrance connects, and the hydrophobic outlet of third level high-pressure heater is connected with the hydrophobic entrance of fourth stage high-pressure heater, and the fourth stage is high
The hydrophobic entrance of the hydrophobic outlet access oxygen-eliminating device of heater is pressed, the feedwater outlet access oxygen-eliminating device of the 6th grade of low-pressure heater
Feed-water intake；The hydrophobic outlet of 6th grade of low-pressure heater is connected with the hydrophobic entrance of the 7th grade of low-pressure heater, and the 7th grade low
The hydrophobic outlet of pressure heater is connected with the hydrophobic entrance of the 8th grade of low-pressure heater, the hydrophobic outlet of the 8th grade of low-pressure heater
It is connected with the feed-water intake of drainage pump, the hydrophobic outlet of the 9th grade of low-pressure heater and the tenth grade of low-pressure heater becomes after converging
The hydrophobic outlet of heat regenerative system；
First order high-pressure heater, second level high-pressure heater, third level high-pressure heater and fourth stage high-pressure heater
Feedwater outlet and feed-water intake be sequentially connected, the feedwater outlet of oxygen-eliminating device is connected to the fourth stage by the feed pump of electric drive
The feed-water intake of high-pressure heater；6th grade of low-pressure heater, the 7th grade of low-pressure heater, the 8th grade of low-pressure heater, the 9th
The feedwater outlet and feed-water intake of grade low-pressure heater and the tenth grade of low-pressure heater are sequentially connected, the outlet of condensate pump and the
The feed-water intake of ten grades of low-pressure heaters is connected；
The generator is connected by cable with feed pump, and the generated energy of the generator directly drives feed pump.
During work, the temperature, pressure parameter of the backheat steam turbine first stage extraction opening is 360.48 DEG C/6.65Mpa, institute
The temperature, pressure parameter of backheat steam turbine second level extraction opening is stated as 302.25 DEG C/4.21Mpa, the backheat steam turbine third level
The temperature, pressure parameter of extraction opening is 244.59 DEG C/2.54Mpa, and the temperature, pressure of the backheat steam turbine fourth stage extraction opening is joined
Number for 188.71 DEG C/1.22Mpa, the temperature, pressure parameter of the backheat steam turbine level V extraction opening for 168.3 DEG C/
0.76Mpa, the temperature, pressure parameter of the backheat turbine discharge mouth is 137.85 DEG C/0.34Mpa.
A kind of workflow of width operating mode double reheat two-shipper heat regenerative system, special type is, when the high-temperature steam of boiler
Into after steam turbine high-pressure cylinder, steam discharge is divided into three parts, and first portion is returned to after boiler heats again, and then enters vapour
In turbine first order intermediate pressure cylinder, thus into steam primary path, after second portion enters the heating feedwater of first order high-pressure heater,
Its is after cooling hydrophobic into second level high-pressure heater, and Part III enters backheat steam turbine, and it is auxiliary logical thus to enter steam
Lu Zhong, the first order steam extraction of backheat steam turbine enter second level high-pressure heater heating feedwater, after cooling hydrophobic to enter the
Three-level high-pressure heater, second level steam extraction enters the heating feedwater of third level high-pressure heater, after cooling hydrophobic into the 4th
Grade high-pressure heater, third level steam extraction enters the heating feedwater of fourth stage high-pressure heater, after cooling hydrophobic to enter deoxygenation
The oxygen and other gases in water are removed after device, fourth stage steam extraction enters oxygen-eliminating device heating feedwater, and level V steam extraction enters the 6th
Grade low-pressure heater heating feedwater, after cooling hydrophobic into the 7th grade of low-pressure heater, the steam discharge of backheat steam turbine enters
7th grade of low-pressure heater heating feedwater, it is after cooling hydrophobic into the 8th grade of low-pressure heater；First portion's steam is in vapour
Steam discharge after the acting of turbine first order intermediate pressure cylinder returns to boiler and heats again, then pass sequentially through steam turbine second level intermediate pressure cylinder,
Steam turbine first stage low pressure (LP) cylinder, the acting of steam turbine second level low pressure (LP) cylinder, are finally expelled in main condenser and condense into water；Steam turbine
The first extraction opening of steam turbine first stage low pressure (LP) cylinder of first order low pressure (LP) cylinder and the steam turbine second level of steam turbine second level low pressure (LP) cylinder
The steam extraction of the first extraction opening of low pressure (LP) cylinder is fed water after converging into the 8th grade of low-pressure heater heating, after cooling hydrophobic into thin
Water pump, then imports the feedwater of the 8th grade of low-pressure heater, the steam turbine first stage low pressure (LP) cylinder of steam turbine first stage low pressure (LP) cylinder the
The steam extraction of two extraction openings is fed water into the 9th grade of low-pressure heater heating, and the steam turbine second level of steam turbine second level low pressure (LP) cylinder is low
The steam extraction of the second extraction opening of cylinder pressure is fed water into the tenth grade of low-pressure heater heating, the 9th grade of low-pressure heater and the tenth grade of low pressure
Heater it is hydrophobic converge after import in main condenser；After Part III steam enters backheat steam turbine, steam discharge enters backheat
Turbine low pressure cylinder condenses into water subsequently into auxiliary condenser, then converges with the drain outlet of main condenser；In main condenser
Condensation water, the condensation water of auxiliary condenser and the 9th grade of low-pressure heater and the tenth grade of low-pressure heater it is hydrophobic converge after water converge
After conjunction, condensate pump is flowed into；Then the tenth grade of low-pressure heater, the 9th grade of low-pressure heater, the 8th grade of low pressure is sequentially flowed through to add
Hot device, the 7th grade of low-pressure heater, the 6th grade of low-pressure heater, oxygen-eliminating device, from the feedwater that the 6th grade of low-pressure heater comes out into
After entering oxygen-eliminating device removing oxygen and other gases, feed pump, fourth stage high-pressure heater, third level hyperbaric heating are subsequently entered
After device, second level high-pressure heater, first order high-pressure heater are heated, boiler is flowed back to.
Beneficial effects of the present invention are：The width operating mode double reheat two-shipper heat regenerative system, compared to traditional double reheat
Unit solves the problems, such as that the bleeder heater steam extraction degree of superheat is excessive, independent backheat steam turbine and backheat turbine low pressure cylinder
After be connected to generator, the operation of electrically driven feed pump can be directly driven, optimize the structure arrangement of unit, intermediate pressure cylinder can take
Disappear steam extraction equipment, to simplify the structure of intermediate pressure cylinder, and then improves the flow efficiency of intermediate pressure cylinder；
The present invention can improve the power supply efficiency 0.1%~0.2% of unit under design conditions, can be carried under 75% load condition
The power supply efficiency 0.6%~0.8% of high unit can improve the power supply efficiency 1%~1.2% of unit, drop under 50% load condition
The low coa consumption rate of unit, allows unit efficiently to be run in wide condition range；
In low- load conditions, conventional rack turbine low pressure cylinder operational effect is bad, and the present invention can be by adjusting back
The flow of this access of Hot gas turbine Yu backheat turbine low pressure cylinder come realize the optimization of unit run；Therefore the present invention is improving
On the basis of the cycle efficieny of unit, the defects of enhance economy and practicability, compensate for existing system technology, have very
Sufficient utility value and very wide application prospect.
Description of the drawings
Fig. 1 is：A kind of flow chart of wide operating mode double reheat two-shipper heat regenerative system embodiment of the present invention；
Figure label represents respectively：1- boilers, 2- steam turbine high-pressure cylinders, 3- steam turbine first stages intermediate pressure cylinder, 4- steam turbines
Second level intermediate pressure cylinder, 5- steam turbine first stages low pressure (LP) cylinder, 6- steam turbines second level low pressure (LP) cylinder, 7- backheats steam turbine, 8- backheat vapour
Turbine low pressure (LP) cylinder, 9- generators, the auxiliary condensers of 10-, the main condensers of 11-, 12- first order high-pressure heater, 13- second level high pressure
Heater, 14- third level high-pressure heater, 15- fourth stages high-pressure heater, 16- oxygen-eliminating devices, the 6th grade of low-pressure heater of 17-,
The tenth grade of the 7th grade of low-pressure heater of 18-, the 8th grade of low-pressure heater of 19-, the 9th grade of low-pressure heater of 20-, 21- low-pressure heating
Device, 22- feed pumps, 23- drainage pumps, 24- condensate pumps, the first extraction opening of a- steam turbine first stages low pressure (LP) cylinder, b- steam turbines
The second extraction opening of level-one low pressure (LP) cylinder, the c- steam turbines second level the first extraction opening of low pressure (LP) cylinder, d- steam turbines second level low pressure (LP) cylinder second
Extraction opening.
Specific embodiment
The present invention provides a kind of wide operating mode double reheat two-shipper heat regenerative system, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
To include as shown in Figure 1, the present invention provides a kind of embodiments of wide operating mode double reheat two-shipper heat regenerative system：Pot
Stove 1；The condenser being made of main condenser 11 and auxiliary condenser 10；By steam turbine high-pressure cylinder 2, steam turbine first stage intermediate pressure cylinder 3,
The steam primary path that steam turbine second level intermediate pressure cylinder 4, steam turbine first stage low pressure (LP) cylinder 5 and steam turbine second level low pressure (LP) cylinder 6 are formed；
The auxiliary access of steam being made of backheat steam turbine 7, backheat turbine low pressure cylinder 8, generator 9；By first order high-pressure heater 12,
Second level high-pressure heater 13, third level high-pressure heater 14, fourth stage high-pressure heater 15, oxygen-eliminating device 16, the 6th grade of low pressure
Heater 17, the 7th grade of low-pressure heater 18, the 8th grade of low-pressure heater 19, the 9th grade of low-pressure heater 20, the tenth grade of low pressure
The heat regenerative system 100 that heater 21, feed pump 22, drainage pump 23, condensate pump 24 are formed；
The air intake order of the wherein feedwater outlet of heat regenerative system 100, boiler 1 and steam turbine high-pressure cylinder 2 is connected, steam turbine
The steam drain of high pressure cylinder 2 respectively with the air intake of backheat steam turbine 7, the air intake of steam turbine first stage intermediate pressure cylinder 3 and backheat system
First air intake of system 100 is connected, and the venthole of steam turbine first stage intermediate pressure cylinder 3 and steam turbine second level intermediate pressure cylinder 4 are into vapour
Mouth is connected, and second level intermediate pressure cylinder 4 is that symmetrical flow division arranges that every side of symmetrical flow division is respectively equipped with a steam drain, two steam discharges
Mouthful after converging, shunt and respectively with the air intake of steam turbine first stage low pressure (LP) cylinder 5 and steam turbine second level low pressure (LP) cylinder 6 into
Steam ports is connected, and steam turbine first stage low pressure (LP) cylinder 5 and steam turbine second level low pressure (LP) cylinder 6 are arranged using symmetrical flow division, wherein symmetrically
Every one side of shunting arrangement is equipped with two extraction openings and a steam drain, steam turbine first stage low pressure (LP) cylinder 5 and steam turbine second
Two steam drains of grade low pressure (LP) cylinder 6 converge the rear air intake with main condenser 11 and are connected, the symmetrical flow division cloth of first order low pressure (LP) cylinder 5
Two the second extraction opening of the steam turbine first stage low pressure (LP) cylinder b put are connected after converging with the 9th air intake of heat regenerative system 100, the
The of two steam turbine second level low pressure (LP) cylinder the second extraction opening d and the heat regenerative system 100 of the symmetrical flow division arrangement of two level low pressure (LP) cylinder 6
Ten air intakes are connected, two the first steam extractions of steam turbine first stage low pressure (LP) cylinder of 5 symmetrical flow division of steam turbine first stage low pressure (LP) cylinder arrangement
After the mouth a and two steam turbine second level the first extraction opening of low pressure (LP) cylinder c of 6 symmetrical flow division of steam turbine second level low pressure (LP) cylinder arrangement converges
It is connected with the 8th air intake of heat regenerative system 100；
Backheat steam turbine 7 is set there are five extraction opening and a steam drain；Five extraction openings are first order extraction opening, respectively
Two level extraction opening, third level extraction opening, fourth stage extraction opening and level V extraction opening, wherein first order extraction opening and heat regenerative system
100 second air intakes are connected, and second level extraction opening is connected with the 3rd air intake of heat regenerative system 100, third level extraction opening and backheat
The 4th air intake of system 100 is connected, and fourth stage extraction opening is connected with the 5th air intake of heat regenerative system 100, level V extraction opening with
The 6th air intake of heat regenerative system 100 is connected；The steam drain of backheat steam turbine 7 is connected with the air intake of backheat turbine low pressure cylinder 8,
The steam drain of backheat turbine low pressure cylinder 8 is connected with the air intake of auxiliary condenser 10, the condensation water out of auxiliary condenser 10, backheat
Converge with the condensation water out of main condenser 11 and be connected afterwards with the condensation water inlet of heat regenerative system 100 in the hydrophobic outlet of system 100；
Backheat turbine low pressure cylinder 8 is installed on after backheat steam turbine 7, the rotor of backheat turbine low pressure cylinder 8 and hair in its rear
The rotor of motor 9 is connected, and generator 9 is connected by electric wire with feed pump 22, in unit normal operation, the hair of this generator 9
Electricity can directly drive the operation of feed pump 22, instead of traditional steam feed pump；
In heat regenerative system 100, the first to the tenth air intake of heat regenerative system 100 respectively is first order hyperbaric heating
The air intake of device 12, the air intake of second level high-pressure heater 13, the air intake of third level high-pressure heater 14, fourth stage high pressure
The air intake of heater 15, the air intake of oxygen-eliminating device 16, air intake, the 7th grade of low-pressure heater of the 6th grade of low-pressure heater 17
18 air intake, the air intake of the 8th grade of low-pressure heater 19, the air intake of the 9th grade of low-pressure heater 20, the tenth grade of low pressure add
The air intake of hot device 21, the condensation water inlet of heat regenerative system 100 are the entrance of condensate pump 24, and the feedwater of heat regenerative system 100 goes out
Mouth is the feedwater outlet of first order high-pressure heater 12, the hydrophobic outlet of the 9th grade of low-pressure heater 20 and the tenth grade of low-pressure heating
The hydrophobic outlet of device 21 becomes the hydrophobic outlet of heat regenerative system 100 after converging；
In heat regenerative system 100, the hydrophobic outlet of first order high-pressure heater 12 and dredging for second level high-pressure heater 13
Water inlet connects, and the hydrophobic outlet of second level high-pressure heater 13 is connected with the hydrophobic entrance of third level high-pressure heater 14, the
The hydrophobic outlet of three-level high-pressure heater 14 is connected with the hydrophobic entrance of fourth stage high-pressure heater 15, fourth stage high-pressure heater
The hydrophobic entrance of 15 hydrophobic outlet access oxygen-eliminating device 16, the feedwater outlet access oxygen-eliminating device 16 of the 6th grade of low-pressure heater 17
Feed-water intake；The hydrophobic outlet of 6th grade of low-pressure heater 17 is connected with the hydrophobic entrance of the 7th grade of low-pressure heater 18, and the 7th
The hydrophobic outlet of grade low-pressure heater 18 is connected with the hydrophobic entrance of the 8th grade of low-pressure heater 19, the 8th grade of low-pressure heater 19
Hydrophobic outlet be connected with the feed-water intake of drainage pump 23, the 9th grade of low-pressure heater 20 and the tenth grade of low-pressure heater 21 are dredged
Water out becomes the hydrophobic outlet of heat regenerative system 100 after converging；
In heat regenerative system 100, first order high-pressure heater 12, second level high-pressure heater 13, third level hyperbaric heating
The feedwater outlet and feed-water intake of device 14 and fourth stage high-pressure heater 15 are sequentially connected, and the feedwater outlet of oxygen-eliminating device 16 passes through electricity
The feed pump 22 of power driving is connected to the feed-water intake of fourth stage high-pressure heater 15；6th grade of low-pressure heater 17, the 7th grade
The feedwater of low-pressure heater 18, the 8th grade of low-pressure heater 19, the 9th grade of low-pressure heater 20 and the tenth grade of low-pressure heater 21
Outlet and feed-water intake are sequentially connected, and the outlet of drainage pump 23 is connected with the feed-water intake of the 7th grade of low-pressure heater 18, condensation water
The outlet of pump 24 is connected with the feed-water intake of the tenth grade of low-pressure heater 21.
The workflow of the present embodiment is：
After the high-temperature steam of boiler 1 enters steam turbine high-pressure cylinder 2, steam discharge is divided into three parts, and first portion returns to
After boiler 1 heats again, and then enter in steam turbine first stage intermediate pressure cylinder 3, thus into steam primary path, second portion into
It is after cooling hydrophobic into second level high-pressure heater 13, Part III after entering the heating feedwater of first order high-pressure heater 12
It into backheat steam turbine 7, thus enters in the auxiliary access of steam, the first order steam extraction of backheat steam turbine 7 enters second level high pressure
The heating feedwater of heater 13, after cooling hydrophobic into third level high-pressure heater 14, second level steam extraction enters third level height
The heating feedwater of heater 14 is pressed, after cooling hydrophobic into fourth stage high-pressure heater 15, third level steam extraction enters the fourth stage
The heating feedwater of high-pressure heater 15, it is after cooling it is hydrophobic enter after oxygen-eliminating device the oxygen and other gases removed in water, the
Level Four steam extraction enters the heating feedwater of oxygen-eliminating device 16, and level V steam extraction is fed water into the 6th grade of heating of low-pressure heater 17, cooling
Afterwards hydrophobic enters the 7th grade of low-pressure heater 18, the steam discharge of backheat steam turbine 7 into the 7th grade of low-pressure heater 18 heat to
Water, it is after cooling hydrophobic into the 8th grade of low-pressure heater 19；First portion's steam does work in steam turbine first stage intermediate pressure cylinder 3
Steam discharge afterwards returns to boiler 1 and heats again, then passes sequentially through steam turbine second level intermediate pressure cylinder 4, steam turbine first stage low pressure (LP) cylinder
5th, steam turbine second level low pressure (LP) cylinder 6 does work, and is finally expelled in main condenser 11 and condenses into water；Steam turbine first stage low pressure (LP) cylinder 5
Steam turbine first stage low pressure (LP) cylinder the first extraction opening a and steam turbine second level low pressure (LP) cylinder 6 steam turbine second level low pressure (LP) cylinder first
The steam extraction of extraction opening c is fed water after converging into the 8th grade of heating of low-pressure heater 19, hydrophobic entrance drainage pump 23 after cooling,
Then the feedwater of the 8th grade of low-pressure heater 19, the steam turbine first stage low pressure (LP) cylinder second of steam turbine first stage low pressure (LP) cylinder 5 are imported
The steam extraction of extraction opening b is fed water into the 9th grade of heating of low-pressure heater 20, the steam turbine second level of steam turbine second level low pressure (LP) cylinder 6
The steam extraction of the second extraction opening of low pressure (LP) cylinder d is into the heating feedwater of the tenth grade of low-pressure heater 21, the 9th grade of low-pressure heater 20 and the
Ten grades of low-pressure heaters 21 it is hydrophobic converge after import in main condenser 11；After Part III steam enters backheat steam turbine 7,
Steam discharge enters backheat turbine low pressure cylinder 8, and water, then the drain outlet with main condenser 11 are condensed into subsequently into auxiliary condenser 10
Converge；The condensation water of condensation water, auxiliary condenser 10 in main condenser 11 and the 9th grade of low-pressure heater 20 and the tenth grade of low pressure
Heater 21 it is hydrophobic converge after water converge after, flow into condensate pump 24；Then sequentially flow through the tenth grade of low-pressure heater 21,
9th grade of low-pressure heater 20, the 8th grade of low-pressure heater 19, the 7th grade of low-pressure heater 18, the 6th grade of low-pressure heater 17,
Oxygen-eliminating device 16 after the feedwater come out from the 6th grade of low-pressure heater 17 enters the removing oxygen of oxygen-eliminating device 16 and other gases, connects
It into feed pump 22, fourth stage high-pressure heater 15, third level high-pressure heater 14, second level high-pressure heater 13, first
After grade high-pressure heater 12 is heated, boiler 1 is flowed back to；Complete workflow terminates；
When setting, steam turbine first stage intermediate pressure cylinder 2 and steam turbine second level intermediate pressure cylinder 3 eliminate steam extraction, simplify middle pressure
The structure of cylinder, therefore in workflow, the efficiency of intermediate pressure cylinder is further promoted, and improves the through-flow of steam primary path
Efficiency, the steam extraction of high-pressure heaters, oxygen-eliminating device, first order low-pressure heater 17 and second level low-pressure heater 18 at different levels are all from
Backheat steam turbine 7, the temperature, pressure parameter of 7 first order extraction opening of backheat steam turbine is 360.48 DEG C/6.65Mpa, and the second level is taken out
The temperature, pressure parameter of steam ports is 302.25 DEG C/4.21Mpa, the temperature, pressure parameter of third level extraction opening for 244.59 DEG C/
2.54Mpa, the temperature, pressure parameter of fourth stage extraction opening is 188.71 DEG C/1.22Mpa, and the temperature, pressure of level V extraction opening is joined
Number is 168.3 DEG C/0.76Mpa, and the temperature, pressure parameter of steam drain is 137.85 DEG C/0.34Mpa, it can thus be seen that extraction opening
Steam parameter is relatively low, reduces the degree of superheat of bleeder heater, reduces the energy loss of bleeder heater, so as to improve heat
The cycle efficieny of Force system.
When setting, the rotor of backheat turbine low pressure cylinder 8 is connected to the rotor of generator 9, and normal work is carried out in unit
When making flow, the generated energy of this generator 9 can directly drive the operation of feed pump 22, instead of traditional steam feed pump,
Make whole system more succinct reliable.
4 afterbody of steam turbine second level intermediate pressure cylinder in the present invention in double reheat system eliminates steam extraction equipment, steam discharge
It is directly entered steam turbine first stage low pressure (LP) cylinder 5 and steam turbine second level low pressure (LP) cylinder 6；Therefore the efficiency of intermediate pressure cylinder is improved, is reduced
The energy loss caused by the steam extraction degree of superheat is excessive of heat regenerative system 100 improves the power supply efficiency of unit about under design conditions
0.1%~0.2%, the power supply efficiency about 0.6%~0.8% of unit can be improved under 75% load condition, under 50% load condition
The power supply efficiency about 1%~1.2% of unit can be improved, the coa consumption rate of unit is reduced, allows unit in wide condition range
Efficient operation.
Since the variable working condition adaptability of traditional secondary reheating embrittlement is not fine, when unit is in underrun operating mode
Under, when the steam flow of steam primary path is excessive, the flow efficiency of turbine low pressure cylinder can be influenced, and then causes entire unit
Cycle efficieny is affected；When this happens, double reheat power generation sets of the present invention can be by adjusting the stream of the auxiliary access of steam
Amount, i.e. increase into the flow of backheat steam turbine 7 and backheat turbine low pressure cylinder 8, realize steam energy optimum utilization and
Realize the high efficient and reliable operation of the entire unit under underrun operating mode.
Claims (4)
1. a kind of width operating mode double reheat two-shipper heat regenerative system, which is characterized in that including：Boiler (1), steam turbine high-pressure cylinder (2),
Steam turbine first stage intermediate pressure cylinder (3), steam turbine second level intermediate pressure cylinder (4), steam turbine first stage low pressure (LP) cylinder (5), steam turbine second
Grade low pressure (LP) cylinder (6), backheat steam turbine (7), backheat turbine low pressure cylinder (8), generator (9), auxiliary condenser (10), main condenser
(11) and heat regenerative system (100)；
The air intake order of the wherein feedwater outlet of heat regenerative system (100), boiler (1) and steam turbine high-pressure cylinder (2) is connected, steamer
The steam drain of machine high pressure cylinder (2) respectively with the air intake of backheat steam turbine (7), the air intake of steam turbine first stage intermediate pressure cylinder (3)
It is connected with the first air intake of heat regenerative system (100), in the venthole of steam turbine first stage intermediate pressure cylinder (3) and the steam turbine second level
The air intake of cylinder pressure (4) is connected, and second level intermediate pressure cylinder (4) arranges that every side of symmetrical flow division is respectively equipped with one for symmetrical flow division
Steam drain, two steam drains are after converging, shunting and the respectively air intake and steam turbine with steam turbine first stage low pressure (LP) cylinder (5)
The air intake of second level low pressure (LP) cylinder (6) is connected, and steam turbine first stage low pressure (LP) cylinder (5) and steam turbine second level low pressure (LP) cylinder (6) are adopted
It is arranged with symmetrical flow division, every one side of wherein symmetrical flow division arrangement is equipped with two extraction openings and a steam drain, steam turbine the
Two steam drains of level-one low pressure (LP) cylinder (5) and steam turbine second level low pressure (LP) cylinder (6) converge the rear air intake with main condenser (11)
It is connected, two the second extraction openings (b) of steam turbine first stage low pressure (LP) cylinder of the symmetrical flow division arrangement of first order low pressure (LP) cylinder (5) are converging
The 9th air intake with heat regenerative system (100) is connected afterwards, two steam turbines of the symmetrical flow division of second level low pressure (LP) cylinder (6) arrangement the
The second extraction opening (d) of two level low pressure (LP) cylinder is connected with the tenth air intake of heat regenerative system (100), steam turbine first stage low pressure (LP) cylinder (5)
Two the first extraction openings (a) of steam turbine first stage low pressure (LP) cylinder and steam turbine second level low pressure (LP) cylinder (6) of symmetrical flow division arrangement are symmetrical
The two steam turbine second level the first extraction openings (c) of low pressure (LP) cylinder of shunting arrangement converge the rear and heat regenerative system (100) the 8th into vapour
Mouth connection；
The backheat steam turbine (7) is set there are five extraction opening and a steam drain；Five extraction openings be respectively first order extraction opening,
Second level extraction opening, third level extraction opening, fourth stage extraction opening and level V extraction opening, wherein first order extraction opening and backheat system
(100) second air intakes of system are connected, and second level extraction opening is connected with the 3rd air intake of heat regenerative system (100), third level extraction opening
It is connected with the 4th air intake of heat regenerative system (100), fourth stage extraction opening is connected with the 5th air intake of heat regenerative system (100), and the 5th
Grade extraction opening is connected with the 6th air intake of heat regenerative system (100)；The steam drain of backheat steam turbine (7) and backheat turbine low pressure cylinder
(8) air intake is connected, and the steam drain of backheat turbine low pressure cylinder (8) is connected with the air intake of auxiliary condenser (10), auxiliary condensing
The condensation water out of device (10), the condensation water out of the hydrophobic outlet of heat regenerative system (100) and main condenser (11) converge after with
The condensation water inlet of heat regenerative system (100) is connected；Backheat turbine low pressure cylinder (8) is installed on after backheat steam turbine (7), backheat
The rotor of turbine low pressure cylinder (8) is connected with the rotor of generator in its rear (9).
A kind of 2. wide operating mode double reheat two-shipper heat regenerative system according to claim 1, which is characterized in that the backheat system
(100) are united by first order high-pressure heater (12), second level high-pressure heater (13), third level high-pressure heater (14), the 4th
Grade high-pressure heater (15), oxygen-eliminating device (16), the 6th grade of low-pressure heater (17), the 7th grade of low-pressure heater (18), the 8th grade
Low-pressure heater (19), the 9th grade of low-pressure heater (20), the tenth grade of low-pressure heater (21), feed pump (22), drainage pump
(23) formed with condensate pump (24)；First to the tenth air intake of heat regenerative system (100) respectively is first order high pressure and adds
The air intake of hot device (12), the air intake of second level high-pressure heater (13), the air intake of third level high-pressure heater (14),
The air intake of level Four high-pressure heater (15), the air intake of oxygen-eliminating device (16), the air intake of the 6th grade of low-pressure heater (17),
The air intake of seven grades of low-pressure heaters (18), the air intake of the 8th grade of low-pressure heater (19), the 9th grade of low-pressure heater (20)
Air intake, the air intake of the tenth grade of low-pressure heater (21), the condensation water inlet of heat regenerative system (100) is condensate pump (24)
Entrance, the feedwater outlet of heat regenerative system (100) is the feedwater outlet of first order high-pressure heater (12), the 9th grade of low-pressure heating
The hydrophobic outlet of device (20) and the hydrophobic outlet of the tenth grade of low-pressure heater (21) become the hydrophobic of heat regenerative system (100) after converging
Outlet；Wherein the hydrophobic outlet of first order high-pressure heater (12) is connected with the hydrophobic entrance of second level high-pressure heater (13),
The hydrophobic outlet of second level high-pressure heater (13) is connected with the hydrophobic entrance of third level high-pressure heater (14), third level high pressure
The hydrophobic outlet of heater (14) is connected with the hydrophobic entrance of fourth stage high-pressure heater (15), fourth stage high-pressure heater (15)
Hydrophobic outlet access oxygen-eliminating device (16) hydrophobic entrance, the feedwater outlet access oxygen-eliminating device of the 6th grade of low-pressure heater (17)
(16) feed-water intake；The hydrophobic outlet of 6th grade of low-pressure heater (17) and the hydrophobic entrance of the 7th grade of low-pressure heater (18)
Connection, the hydrophobic outlet of the 7th grade of low-pressure heater (18) are connected with the hydrophobic entrance of the 8th grade of low-pressure heater (19), and the 8th
The hydrophobic outlet of grade low-pressure heater (19) is connected with the feed-water intake of drainage pump (23), the 9th grade of low-pressure heater (20) and the
The hydrophobic outlet of ten grades of low-pressure heaters (21) becomes the hydrophobic outlet of heat regenerative system (100) after converging；
First order high-pressure heater (12), second level high-pressure heater (13), third level high-pressure heater (14) and the fourth stage are high
The feedwater outlet and feed-water intake of pressure heater (15) are sequentially connected, feedwater outlet the giving by electric drive of oxygen-eliminating device (16)
Water pump (22) is connected to the feed-water intake of fourth stage high-pressure heater (15)；6th grade of low-pressure heater (17), the 7th grade of low pressure
Heater (18), the 8th grade of low-pressure heater (19), the 9th grade of low-pressure heater (20) and the tenth grade of low-pressure heater (21)
Feedwater outlet and feed-water intake are sequentially connected, the outlet of condensate pump (24) and the feed-water intake of the tenth grade of low-pressure heater (21)
It is connected；
The generator (9) is connected by electric wire with feed pump (22), and the generated energy of the generator (9) directly drives feed pump
(22)。
3. a kind of wide operating mode double reheat two-shipper heat regenerative system according to claim 1, which is characterized in that during work, institute
The temperature, pressure parameter of backheat steam turbine (7) first order extraction opening is stated as 360.48 DEG C/6.65Mpa, the backheat steam turbine (7)
The temperature, pressure parameter of second level extraction opening is 302.25 DEG C/4.21Mpa, backheat steam turbine (7) third level extraction opening
Temperature, pressure parameter is 244.59 DEG C/2.54Mpa, and the temperature, pressure parameter of backheat steam turbine (7) fourth stage extraction opening is
188.71 DEG C/1.22Mpa, the temperature, pressure parameter of backheat steam turbine (7) the level V extraction opening for 168.3 DEG C/
0.76Mpa, the temperature, pressure parameter of backheat steam turbine (7) steam drain is 137.85 DEG C/0.34Mpa.
4. a kind of workflow of wide operating mode double reheat two-shipper heat regenerative system according to claim 1, which is characterized in that when
After the high-temperature steam of boiler (1) enters steam turbine high-pressure cylinder (2), steam discharge is divided into three parts, and first portion returns to boiler (1)
It after heating again, and then enters in steam turbine first stage intermediate pressure cylinder (3), thus into steam primary path, second portion enters
After first order high-pressure heater (12) heating feedwater, hydrophobic entrance second level high-pressure heater (13) after cooling, the 3rd
Divide into backheat steam turbine (7), thus enter in the auxiliary access of steam, the first order steam extraction of backheat steam turbine (7) enters second
Grade high-pressure heater (13) heat feedwater, it is after cooling it is hydrophobic into third level high-pressure heater (14), second level steam extraction into
Enter third level high-pressure heater (14) heating feedwater, it is after cooling hydrophobic into fourth stage high-pressure heater (15), the third level
Steam extraction enters fourth stage high-pressure heater (15) heating feedwater, after cooling hydrophobic to enter after oxygen-eliminating device the oxygen removed in water
Gas and other gases, fourth stage steam extraction enter oxygen-eliminating device (16) heating feedwater, and level V steam extraction enters the 6th grade of low-pressure heater
(17) heating feedwater, it is after cooling it is hydrophobic enter the 7th grade of low-pressure heater (18), the steam discharge of backheat steam turbine (7) is into the
Seven grades of low-pressure heater (18) heating feedwater, it is after cooling hydrophobic into the 8th grade of low-pressure heater (19)；First portion steams
Steam discharge of the vapour after steam turbine first stage intermediate pressure cylinder (3) acting returns to boiler (1) and heats again, then passes sequentially through steam turbine the
Two level intermediate pressure cylinder (4), steam turbine first stage low pressure (LP) cylinder (5), steam turbine second level low pressure (LP) cylinder (6) acting are finally expelled to main solidifying
Vapour device condenses into water in (11)；The first extraction opening (a) of steam turbine first stage low pressure (LP) cylinder and vapour of steam turbine first stage low pressure (LP) cylinder (5)
The steam extraction of the steam turbine second level the first extraction opening (c) of low pressure (LP) cylinder of turbine second level low pressure (LP) cylinder (6) is low into the 8th grade after converging
Heater (19) is pressed to heat feedwater, it is after cooling hydrophobic into drainage pump (23), then import the 8th grade of low-pressure heater
(19) feedwater, the steam extraction of the second extraction opening (b) of steam turbine first stage low pressure (LP) cylinder of steam turbine first stage low pressure (LP) cylinder (5) is into the
Nine grades of low-pressure heater (20) heating feedwater, the steam turbine second level the second steam extraction of low pressure (LP) cylinder of steam turbine second level low pressure (LP) cylinder (6)
The steam extraction of mouth (d) is fed water into the tenth grade of low-pressure heater (21) heating, the 9th grade of low-pressure heater (20) and the tenth grade of low pressure
Heater (21) it is hydrophobic converge after import in main condenser (11)；After Part III steam enters backheat steam turbine (7), row
Vapour enters backheat turbine low pressure cylinder (8), and water, then the draining with main condenser (11) are condensed into subsequently into auxiliary condenser (10)
Converge outlet；The condensation water of condensation water, auxiliary condenser (10) in main condenser (11) and the 9th grade of low-pressure heater (20) with
Tenth grade of low-pressure heater (21) it is hydrophobic converge after water converge after, flow into condensate pump (24)；Then sequentially flow through the tenth
Grade low-pressure heater (21), the 9th grade of low-pressure heater (20), the 8th grade of low-pressure heater (19), the 7th grade of low-pressure heater
(18), the 6th grade of low-pressure heater (17), oxygen-eliminating device (16), the feedwater come out from the 6th grade of low-pressure heater (17) enter deoxygenation
After device (16) removes oxygen and other gases, it is high to subsequently enter feed pump (22), fourth stage high-pressure heater (15), the third level
After pressure heater (14), second level high-pressure heater (13), first order high-pressure heater (12) are heated, boiler (1) is flowed back to.
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| CN109099414A (en) * | 2018-08-15 | 2018-12-28 | 华北电力大学 | The double reheat system of integral external steam condenser and regenerative steam turbine |
| CN109296413A (en) * | 2018-10-30 | 2019-02-01 | 中国华能集团清洁能源技术研究院有限公司 | A kind of the bypass double reheat power generator and method cooling using deep sea water |
| CN109489098A (en) * | 2018-11-22 | 2019-03-19 | 李申强 | A kind of circulating water heating system for large-scale Condensing steam turine |
| CN110080834A (en) * | 2019-04-04 | 2019-08-02 | 东南大学 | A kind of low pressure (LP) cylinder optimization system of coal unit Ultra-low load operation |
| CN110593972A (en) * | 2019-09-05 | 2019-12-20 | 大唐郓城发电有限公司 | Double-machine heat regenerative system |
| CN110645062A (en) * | 2019-10-31 | 2020-01-03 | 大唐郓城发电有限公司 | Double-machine regenerative system participating in primary frequency modulation and operation method thereof |
| CN110645061A (en) * | 2019-10-31 | 2020-01-03 | 大唐郓城发电有限公司 | Double-machine regenerative system for cutting off low-pressure heater and primary frequency modulation method thereof |
| CN110735674A (en) * | 2019-10-31 | 2020-01-31 | 大唐郓城发电有限公司 | Operation-controllable double-machine regenerative system |
| CN111520203A (en) * | 2020-04-09 | 2020-08-11 | 华电电力科学研究院有限公司 | Steam turbine body and heat recovery system integrated comprehensive efficiency improving system and method under steam parameter improving condition |
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