CN207740053U - 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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- CN207740053U CN207740053U CN201820023472.2U CN201820023472U CN207740053U CN 207740053 U CN207740053 U CN 207740053U CN 201820023472 U CN201820023472 U CN 201820023472U CN 207740053 U CN207740053 U CN 207740053U
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Abstract
The utility model proposes a kind of wide operating mode double reheat two-shipper heat regenerative systems 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, and also the low pressure (LP) cylinder of backheat steam turbine and backheat steam turbine, condenser system include 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 later in main condenser.The utility model solves the problems, such as that the bleeder heater steam extraction degree of superheat is excessive, while improving the flow efficiency of intermediate pressure cylinder；On the basis of improving the cycle efficieny of unit, economy and practicability are enhanced.
Description
Technical field
The utility model is related to a kind of thermal power generation systems, and in particular to a kind of double reheat two-shipper heat regenerative system.
Background technology
Currently, the direction of China's fired power generating unit towards large capacity, high parameter is developed, 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
To the mean temperature of steam heat absorption can be further improved in double reheat technology, under identical temperature condition, compares 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 prodigious problems of the heat regenerative system steam extraction degree of superheat at different levels, 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 increasing 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
In the prevalence of the problem that adaptability is bad under the conditions of variable parameter operation, 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 prodigious influence to the performance of double reheat power generation sets and safe operation.
Utility model content
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 sequence of the wherein feedwater outlet, boiler with steam turbine high-pressure cylinder of heat regenerative system 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 is simultaneously connected respectively with the air intake of the air intake of steam turbine first stage low pressure (LP) cylinder and steam turbine second level low pressure (LP) cylinder, steam turbine the
Level-one low pressure (LP) cylinder and steam turbine second level low pressure (LP) cylinder are all made of symmetrical flow division arrangement, and every side of wherein symmetrical flow division arrangement is all provided with
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
It is connected with the air intake of main condenser after conjunction, 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 connect with the 8th air intake of heat regenerative system afterwards；
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 with return
The second air intake of hot systems is connected, and second level extraction opening is connected with heat regenerative system third air intake, 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 is 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 connect 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 connect with the hydrophobic entrance of the 7th grade of low-pressure heater, and the 7th grade low
The hydrophobic outlet of pressure heater is connect 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 connect 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.
The beneficial effects of the utility model are：The width operating mode double reheat two-shipper heat regenerative system, it is secondary compared to traditional
Reheating embrittlement solves the problems, such as that the bleeder heater steam extraction degree of superheat is excessive, and independent backheat steam turbine and backheat steam turbine are low
It is connected to generator after cylinder pressure, the operation of electrically driven feed pump can be directly driven, optimizes the structure arrangement of unit, intermediate pressure cylinder can
To cancel steam extraction equipment, to simplify the structure of intermediate pressure cylinder, and then the flow efficiency of intermediate pressure cylinder is improved；
The utility model can be improved the power supply efficiency 0.1%~0.2% of unit under design conditions, under 75% load condition
The power supply efficiency 0.6%~0.8% of unit can be improved, can be improved under 50% load condition the power supply efficiency 1% of unit~
1.2%, the coa consumption rate of unit is reduced, unit is allow efficiently to run in a wide range of operating conditions；
In low- load conditions, conventional rack turbine low pressure cylinder operational effect is bad, and the utility model can pass through tune
The flow of section backheat steam turbine Yu backheat turbine low pressure cylinder this access realizes that the optimization of unit is run；Therefore this practicality is new
Type enhances economy and practicability on the basis of improving the cycle efficieny of unit, compensates for lacking for existing system technology
It falls into, there is 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 utility model；
Figure label indicates 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, the second level 13- 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 implementation mode
The utility model provides a kind of wide operating mode double reheat two-shipper heat regenerative system, below in conjunction with the accompanying drawings and is embodied
Mode is described in further detail the utility model.
It is wrapped in a kind of embodiment of wide operating mode double reheat two-shipper heat regenerative system as shown in Figure 1, the utility model provides
It includes：Boiler 1；The condenser being made of main condenser 11 and auxiliary condenser 10；By in steam turbine high-pressure cylinder 2, steam turbine first stage
The steam that cylinder pressure 3, 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 constituted
Primary path；The auxiliary access of steam being made of backheat steam turbine 7, backheat turbine low pressure cylinder 8, generator 9；Added by first order high pressure
Hot device 12, second level high-pressure heater 13, third level high-pressure heater 14, fourth stage high-pressure heater 15, oxygen-eliminating device the 16, the 6th
Grade 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 the 20, the tenth
The heat regenerative system 100 that grade low-pressure heater 21, feed pump 22, drainage pump 23, condensate pump 24 are constituted；
The air intake sequence of the wherein feedwater outlet, boiler 1 with steam turbine high-pressure cylinder 2 of heat regenerative system 100 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 all made of symmetrical flow division arrangement, wherein symmetrically
Every 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 set 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 connect 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 100 third air intake of heat regenerative system, third level extraction opening and backheat
The 4th air intake of system 100 be connected, fourth stage extraction opening is connected with the 5th air intake of heat regenerative system 100, level V extraction opening and
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
The condensation water out of the hydrophobic outlet of system 100 and main condenser 11 converges the condensation water inlet phase with heat regenerative system 100 afterwards
Even；Backheat turbine low pressure cylinder 8 is installed on after backheat steam turbine 7, the rotor of backheat turbine low pressure cylinder 8 in its rear
The rotor of generator 9 is connected, and generator 9 is connected by electric wire with feed pump 22, in unit normal operation, this generator 9
Generated energy 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, the fourth stage are high
Press air intake, the 7th grade of low-pressure heating of the air intake of heater 15, the air intake of oxygen-eliminating device 16, the 6th grade of low-pressure heater 17
The air intake of device 18, 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
The air intake of heater 21, the condensation water inlet of heat regenerative system 100 are the entrance of condensate pump 24, the water supply of heat regenerative system 100
Outlet is the feedwater outlet of first order high-pressure heater 12, and the hydrophobic outlet of the 9th grade of low-pressure heater 20 adds with the tenth grade of low pressure
The hydrophobic outlet of hot 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 connect with the hydrophobic entrance of third level high-pressure heater 14, the
The hydrophobic outlet of three-level high-pressure heater 14 is connect 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 connect 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 connect with the hydrophobic entrance of the 8th grade of low-pressure heater 19, the 8th grade of low-pressure heater 19
Hydrophobic outlet connect 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
Hydrophobic outlet 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
The feed pump 22 of electric drive is connected to the feed-water intake of fourth stage high-pressure heater 15；6th grade of low-pressure heater the 17, the 7th
Grade 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 are given
Water out 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, condenses
The outlet of water 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 part returns to
After boiler 1 heats again, and then enter in steam turbine first stage intermediate pressure cylinder 3, thus enter steam primary path, second part into
It is after cooling hydrophobic into second level high-pressure heater 13, Part III after entering the heating water supply 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
Heater 13 heats water supply, and after cooling hydrophobic into third level high-pressure heater 14, second level steam extraction enters third level height
Heater 14 is pressed to heat water supply, after cooling hydrophobic into fourth stage high-pressure heater 15, third level steam extraction enters the fourth stage
High-pressure heater 15 heats water supply, 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 oxygen-eliminating device 16 and heats water supply, and level V steam extraction enters the 6th grade of low-pressure heater 17 and heats water supply, cooling
The 7th grade of low-pressure heater 18 of hydrophobic entrance afterwards, the steam discharge of backheat steam turbine 7 enter the 7th grade of heating of low-pressure heater 18 and give
Water, it is after cooling hydrophobic into the 8th grade of low-pressure heater 19；First part'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
5, 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 enters the 8th grade of low-pressure heater 19 and heats water supply after converging, after cooling hydrophobic into drainage pump
23, then import the water supply of the 8th grade of low-pressure heater 19, the steam turbine first stage low pressure (LP) cylinder of steam turbine first stage low pressure (LP) cylinder 5 the
The steam extraction of two extraction opening b enters the 9th grade of low-pressure heater 20 and heats water supply, the steam turbine second of steam turbine second level low pressure (LP) cylinder 6
The steam extraction of grade the second extraction opening of low pressure (LP) cylinder d enters the tenth grade of low-pressure heater 21 and heats water supply, the 9th grade of low-pressure heater 20 with
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,
Its steam discharge enters backheat turbine low pressure cylinder 8, condenses into water subsequently into auxiliary condenser 10, then go out with the draining of main condenser 11
Mouth converges；The condensed water of condensed water, auxiliary condenser 10 in main condenser 11 and the 9th grade of low-pressure heater 20 are low with the tenth grade
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, 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, after the water supply come out from the 6th grade of low-pressure heater 17 enters the removing oxygen of oxygen-eliminating device 16 and other gases,
Subsequently enter feed pump 22, fourth stage high-pressure heater 15, third level high-pressure heater 14, second level high-pressure heater 13,
After level-one high-pressure heater 12 is heated, boiler 1 is flowed back to；Complete workflow terminates；
In 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
The steam extraction of efficiency, high-pressure heaters, oxygen-eliminating device, first order low-pressure heater 17 and second level low-pressure heater 18 at different levels is all from
The temperature, pressure parameter of backheat steam turbine 7,7 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 is 244.59 DEG C/
The temperature, pressure parameter of 2.54Mpa, fourth stage extraction opening are 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 it is relatively low, reduce the degree of superheat of bleeder heater, reduce the energy loss of bleeder heater, to improve
The cycle efficieny of therrmodynamic system.
In 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,
Keep whole system more succinct reliable.
4 tail portion of steam turbine second level intermediate pressure cylinder in the utility model in double reheat system eliminates steam extraction equipment,
Steam discharge 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,
The energy loss caused by the steam extraction degree of superheat is excessive of heat regenerative system 100 is reduced, the power supply efficiency of unit is improved under design conditions
About 0.1%~0.2%, the power supply efficiency about 0.6%~0.8% of unit, 50% load condition can be improved under 75% load condition
Under the power supply efficiency about 1%~1.2% of unit can be improved, reduce the coa consumption rate of unit, allow unit in wide condition range
Interior 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 lead to entire unit
Cycle efficieny is affected；When this happens, the utility model double reheat power generation sets can be by adjusting the auxiliary access of steam
Flow, that is, increase into backheat steam turbine 7 and backheat turbine low pressure cylinder 8 flow, realize the best profit of steam energy
With, and realize the high efficient and reliable operation of the entire unit under underrun operating mode.
Claims (2)
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 sequence 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 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
It is connected afterwards with the 9th air intake of heat regenerative system (100), 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) sets 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 uniting are connected, and second level extraction opening is connected with heat regenerative system (100) third air intake, 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 and backheat turbine low pressure cylinder of backheat steam turbine (7)
(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 hydrophobic outlet of heat regenerative system (100) and main condenser (11) condensation water out 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).
2. a kind of 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) it is 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 tenth grade of low-pressure heater (21) air intake, 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 connect with the hydrophobic entrance of second level high-pressure heater (13),
The hydrophobic outlet of second level high-pressure heater (13) is connect with the hydrophobic entrance of third level high-pressure heater (14), third level high pressure
The hydrophobic outlet of heater (14) is connect 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 of the 6th grade of low-pressure heater (17) accesses oxygen-eliminating device
(16) feed-water intake；The hydrophobic entrance of the hydrophobic outlet of 6th grade of low-pressure heater (17) and the 7th grade of low-pressure heater (18)
Connection, the hydrophobic outlet of the 7th grade of low-pressure heater (18) are connect 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 connect 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 feed-water intake of the outlet of condensate pump (24) and the tenth grade of low-pressure heater (21)
It is connected；
The generator (9) is connected by cable with feed pump (22), and the generated energy of the generator (9) directly drives feed pump
(22)。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820023472.2U CN207740053U (en) | 2018-01-08 | 2018-01-08 | A kind of width operating mode double reheat two-shipper heat regenerative system |
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| CN201820023472.2U CN207740053U (en) | 2018-01-08 | 2018-01-08 | A kind of width operating mode double reheat two-shipper heat regenerative system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108049922A (en) * | 2018-01-08 | 2018-05-18 | 华北电力大学 | A kind of width operating mode double reheat two-shipper heat regenerative system |
| CN114704340A (en) * | 2022-05-06 | 2022-07-05 | 中国船舶重工集团公司第七0三研究所 | Double-low-pressure-cylinder zero-output steam turbine set regenerative system and operation method |
-
2018
- 2018-01-08 CN CN201820023472.2U patent/CN207740053U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108049922A (en) * | 2018-01-08 | 2018-05-18 | 华北电力大学 | A kind of width operating mode double reheat two-shipper heat regenerative system |
| CN114704340A (en) * | 2022-05-06 | 2022-07-05 | 中国船舶重工集团公司第七0三研究所 | Double-low-pressure-cylinder zero-output steam turbine set regenerative system and operation method |
| CN114704340B (en) * | 2022-05-06 | 2023-12-08 | 中国船舶重工集团公司第七0三研究所 | Double-low-pressure cylinder zero-output steam turbine unit regenerative system and operation method |
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