CN108954291A - A kind of power station unit pipe-line system - Google Patents
A kind of power station unit pipe-line system Download PDFInfo
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- CN108954291A CN108954291A CN201810791048.7A CN201810791048A CN108954291A CN 108954291 A CN108954291 A CN 108954291A CN 201810791048 A CN201810791048 A CN 201810791048A CN 108954291 A CN108954291 A CN 108954291A
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- pressure heater
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- pressure
- power station
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 230000002209 hydrophobic effect Effects 0.000 claims description 8
- 230000008676 import Effects 0.000 claims 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a kind of power station unit pipe-line systems, including boiler, live steam pipe, the big bypass of level-one, first communicating pipe, second communicating pipe, high-pressure heater connection group, oxygen-eliminating device, low-pressure heater and condenser, the live steam pipe connects the boiler, the big bypass of level-one is separately connected the live steam pipe and the condenser, the condenser and the low-pressure heater pass through piping connection, the low-pressure heater and the oxygen-eliminating device pass through piping connection, the water side-entrance of the oxygen-eliminating device and the high-pressure heater connection group passes through piping connection, it is separately connected the vapour side-entrance of the level-one big bypass and the high-pressure heater connection group first communicating pipe, it is separately connected the vapour side outlet and the oxygen-eliminating device of the high-pressure heater connection group second communicating pipe.There are the big reject steam energy dissipation of level-one and boiler feed temperature are too low for solving the problems, such as existing power station unit pipe-line system for the technical program.
Description
Technical field
The invention belongs to power station water supply steam supply pipe road technique fields, and in particular to a kind of power station unit pipe-line system.
Background technique
For the ease of Unit Commitment accident treatment and certain special methods of operation are adapted to, power station unit is both provided with bypass system
System, main function have: (1) guaranteeing the evaporation capacity of boiler minimum load.(2) reheater is protected.(3) start quickly speed makes
Red switch steam pressure and temperature more match, and meet the needs of the various Starting mode of steam turbine.The common bypass system of large sized unit
System has two-stage series connection bypass and the big bypass two types of level-one.The big bypath system of level-one refers to that high parameter steam does not enter cylinder
Flow passage component acting, but pass through the temperature-decreased pressure reducer in parallel with the cylinder, the steam after decompression desuperheat is sent to condenser and is gone
Connection system.The characteristics of bypass unit big due to level-one, can only recycle working medium, on the one hand increase the power output of condensate pump
(bypass desuperheating water is derived from condensed water) and condenser duty；On the other hand, due to by the steam heat of the big bypass of level-one without
Method recycles, and consumes fuel in vain, so that unit economy declines.
Meanwhile when performing low-load running of machine set, often because of feed temperature, denitration entrance flue gas temperature is caused to be unsatisfactory for denitration
Investment condition, and then generate environmentally friendly appraisal problem.Although Some Domestic power plant is improved low negative using No. 0 high-pressure heater is added
Feed temperature under lotus operating condition, but there is a problem of that one-time investment is big.
Summary of the invention
For the above technical problems, the present invention provides a kind of power station unit pipe-line systems, to solve existing electricity
Unit pipe-line system of standing has that the big reject steam energy dissipation of level-one and boiler feed temperature are too low, the power station unit
Pipe-line system is recyclable to be bypassed the heat drained, utmostly improves unit feed temperature, be conducive to boiler combustion stabilization, accelerate to take off
Nitre system put into operation or expand denitration put into operation load range, reduce cost, being capable of start-up course and underrun band to unit
Carry out economic and environment-friendly benefit.
The present invention provides a kind of power station unit pipe-line systems, including the big bypass of boiler, live steam pipe, level-one, the first connection
Pipe, the second communicating pipe, high-pressure heater connection group, oxygen-eliminating device, low-pressure heater and condenser, the live steam pipe connect the pot
Furnace, the big bypass of level-one are separately connected the live steam pipe and the condenser, and the condenser and the low-pressure heater are logical
It crosses piping connection, the low-pressure heater and the oxygen-eliminating device and passes through piping connection, the oxygen-eliminating device and the high-pressure heater
The water side-entrance of connection group is separately connected the big bypass of the level-one and the hyperbaric heating first communicating pipe by piping connection
The vapour side-entrance of device connection group, be separately connected second communicating pipe high-pressure heater connection group vapour side outlet and the deoxygenation
Device.
Further, the high-pressure heater connection group includes that No. 1 high-pressure heater, No. 2 high-pressure heaters and No. 3 high pressures add
Hot device, No. 3 high-pressure heaters, No. 2 high-pressure heaters and No. 1 high-pressure heater are along the flow direction of medium water
It is sequentially connected in series setting, the vapour side-entrance of No. 1 high-pressure heater is connected with the first steam inlet pipe, No. 2 high-pressure heaters
Vapour side-entrance is connected with the second steam inlet pipe, and the vapour side-entrance of No. 3 high-pressure heaters is connected with third steam inlet pipe, and described first
It is separately connected the big bypass of the level-one and first steam inlet pipe communicating pipe.
Further, first steam inlet pipe is connected with steam turbine, be provided on first steam inlet pipe the first valve and
Second valve.
Further, third valve and the first attemperator are provided in the big bypass of the level-one.
Further, first communicating pipe is equipped with the 4th valve, the first regulating valve, the second attemperator and the first check
Valve.
Further, second communicating pipe is equipped with the 5th valve, the second regulating valve and the second non-return valve.
Further, drain pipe is also connected between No. 1 high-pressure heater and the condenser, it is described hydrophobic effective
In the hydrophobic of No. 1 high-pressure heater is guided to the condenser, the 6th valve and third are provided on the drain pipe
Regulating valve.
Further, condensate pump is provided between the condenser and the low-pressure heater.
Further, feed pump is provided between the oxygen-eliminating device and the high-pressure heater connection group.
This power station unit pipe-line system is directed to the characteristics of level-one big bypass unit, to the big bypass of level-one and high-pressure heater
Connection group is transformed, and draws for the first communicating pipe in the big bypass of level-one, leads directly to high-pressure heater connection group vapour side, and described first
The effect of communicating pipe is when the steam of boiler not can enter the acting of cylinder flow passage component, can to utilize its time in the unit starting stage
Receive heat；It drew for the second communicating pipe in the normal hydrophobic pipeline of high-pressure heater connection group, leads directly to oxygen-eliminating device, second connection
The effect of pipe is to recycle the hydrophobic working medium of high-pressure heater connection group and heat in the unit starting stage using it, be transformed in this way
The advantages of be:
(1) in the unit starting stage, most of heat is recycled.Do not enter the high parameter steam of cylinder flow passage component acting,
Most of is no longer to be immediately discharged to condenser after pressure and temperature reducing, but enter high-pressure heater connection group vapour side, heats water supply, improves
Feed temperature.Be conducive to boiler combustion in this way to stablize, be also beneficial to improve denitration entrance flue gas temperature, meet denitration as early as possible and put into operation
Condition makes unit qualified discharge.
(2) in the unit starting stage, reduce condensate pump power output, reduce condenser duty.Since most of steam exists
It is returned directly to oxygen-eliminating device after the heating water supply of high-pressure heater connection group, condensate pump acting is not only reduced, also reduces condenser
Thermic load saves station service.
(3) in performing low-load running of machine set operating condition, feed temperature is effectively improved, improves economizer exit flue gas temperature in boiler
Degree, avoids denitrating system from exiting, meets unit depth peak regulation needs.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structure chart of power station unit pipe-line system.
Specific embodiment
The invention discloses a kind of power station unit pipe-line system, the power station unit pipe-line system is recyclable to bypass the heat drained
Amount, utmostly raising unit feed temperature, the denitration that puts into operation or expand conducive to 1 flameholding of boiler, quickening denitrating system put into operation
Load range reduces cost, can start-up course to unit and underrun bring economic and environment-friendly benefit.
Below in conjunction with the attached drawing in the present invention, the technical solution in the present invention is clearly and completely described, is shown
So, described is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Those of ordinary skill in the art's every other embodiment obtained without creative labor belongs to this
Invent the range of protection.
Shown in Figure 1, the invention discloses a kind of power station unit pipe-line system, including boiler 1, live steam pipe 2, level-one are big
Bypass the 9, first communicating pipe 3, the second communicating pipe 14, high-pressure heater connection group, oxygen-eliminating device 27, low-pressure heater 28 and condenser
30, the live steam pipe 2 connects the boiler 1, and the big bypass 9 of level-one is separately connected the live steam pipe 2 and the condenser 30,
With the low-pressure heater 28 by piping connection, the low-pressure heater 28 passes through the condenser 30 with the oxygen-eliminating device 27
Piping connection, the oxygen-eliminating device 27 and the water side-entrance of the high-pressure heater connection group pass through piping connection, first connection
Pipe 3 is separately connected the vapour side-entrance of the level-one big bypass 9 and the high-pressure heater connection group, distinguishes second communicating pipe 14
Connect the vapour side outlet and the oxygen-eliminating device 27 of the high-pressure heater connection group.
This power station unit pipe-line system is directed to the characteristics of level-one 9 unit of big bypass, bypass 9 big to level-one and hyperbaric heating
Device connection group is transformed, and was drawn for the first communicating pipe 3 in the big bypass 9 of level-one, is led directly to high-pressure heater connection group vapour side, described
The effect of first communicating pipe 3 be in the unit starting stage, the steam of boiler 1 not can enter cylinder flow passage component acting when, can benefit
Heat is recycled with it；Went out for the second communicating pipe 14 in normal 18 pass of drain pipe of high-pressure heater connection group, lead directly to oxygen-eliminating device 27,
The effect of second communicating pipe 14 is to recycle the hydrophobic working medium of high-pressure heater connection group and heat using it in the unit starting stage
The advantages of measuring, being transformed in this way is:
(1) in the unit starting stage, most of heat is recycled.Do not enter the high parameter steam of cylinder flow passage component acting,
Most of is no longer to be immediately discharged to condenser 30 after pressure and temperature reducing, but enter high-pressure heater connection group vapour side, heats water supply, mentions
High feed temperature.Be conducive to 1 flameholding of boiler in this way, be also beneficial to improve denitration entrance flue gas temperature, meet denitration as early as possible
Put into operation condition, makes unit qualified discharge.
(2) in the unit starting stage, reduce condensate pump 29 and contribute, reduce by 30 thermic load of condenser.Due to most of steaming
Vapour is returned directly to oxygen-eliminating device 27 after high-pressure heater connection group heats water supply, not only reduces the acting of condensate pump 29, also reduces
Condenser 30 thermic load saves station service.
(3) in performing low-load running of machine set operating condition, feed temperature is effectively improved, improves economizer exit flue gas temperature in boiler 1
Degree, avoids denitrating system from exiting, meets unit depth peak regulation needs.
The high-pressure heater connection group includes 21, No. 2 high-pressure heater 23 and No. 3 high-pressure heaters of No. 1 high-pressure heater
25, the flowing of No. 3 high-pressure heaters 25, No. 2 high-pressure heaters 23 and No. 1 high-pressure heater 21 along medium water
Direction is sequentially connected in series setting, and the vapour side-entrance of No. 1 high-pressure heater 21 is connected with the first steam inlet pipe 10, No. 2 high pressures
The vapour side-entrance of heater 23 is connected with the second steam inlet pipe 22, and the vapour side-entrance of No. 3 high-pressure heaters 25 is connected with third
Steam inlet pipe 24 is separately connected the big bypass 9 of the level-one and first steam inlet pipe 10 first communicating pipe 3.
First steam inlet pipe 10 is connected with steam turbine, and the first valve 11 and second is provided on first steam inlet pipe 10
Valve 12.
The effect of first valve 11 mainly prevent when closed 21 vapour side steam of No. 1 high-pressure heater and first into
Steam in steam pipe 10 blows back into steam turbine.The effect that first valve 11 is opened is that the steam of steam turbine is connected to No. 1 height
Press 21 vapour side of heater.First valve 11 is the important of pipeline between connection steam turbine and No. 1 21 vapour side of high-pressure heater
Operate valve.
The effect of second valve 12 mainly closes isolation No. 1 21 working medium of high-pressure heater of cutting and enters steam turbine,
Jeopardize Turbine Safety.The effect that second valve 12 is opened is that the steam of steam turbine is connected to No. 1 21 vapour of high-pressure heater
Side.Second valve 12 is the important operation valve for connecting pipeline between steam turbine and No. 1 21 vapour side of high-pressure heater.
Third valve 7 and the first attemperator 8 are provided in the big bypass 9 of level-one.
The high parameter steam that isolation cutting boiler 1 is mainly closed in the effect of the third valve 7 enters condenser 30；
The effect that the third valve 7 is opened is that the steam of conducting boiler 1 drains into condenser 30, and controls 1 pressure of boiler.When unit opens
Under dynamic or accident conditions, the third valve 7 needs to open.
The effect of first attemperator 8 mainly when the big bypass 9 of level-one puts into operation, steams high temperature by spraying into condensed water
Vapour cools down, it is ensured that meets system and uses temperature requirement.
First communicating pipe 3 is equipped with the 4th valve 4, the first regulating valve 5, the second attemperator 6 and the first non-return valve 13.
The steam that isolation boiler 1 is mainly closed in the effect that 4th valve 4 is closed enters No. 1 21 vapour of high-pressure heater
Side, while the water for being also prevented from No. 1 high-pressure heater 21 flows backward to the big bypass 9 of unit level-one, causes accident；4th valve 4
The effect of opening is that the steam of conducting boiler 1 enters No. 1 21 vapour side of high-pressure heater.4th valve 4 is connection unit one
The important operation valve of pipeline between grade 9 and No. 1 21 vapour sides of high-pressure heater of bypass greatly.
The effect of first regulating valve 5 mainly adjusts the throttle flow that boiler 1 enters No. 1 21 vapour side of high-pressure heater,
Prevent 21 vapour side superpressure of No. 1 high-pressure heater.First regulating valve 5 is connection 9 and No. 1 hyperbaric heatings of the big bypass of unit level-one
The important operation valve of pipeline between 21 vapour side of device.
The effect of second attemperator 6 mainly when this power station unit pipe-line system works normally, is given by spraying into
Water cools down to high-temperature steam, it is ensured that meets system and uses temperature requirement.
The effect of first non-return valve 13 mainly prevents the aqueous reflux of 21 vapour side of No. 1 high-pressure heater to unit level-one
Big bypass 9, first non-return valve 13 have one-way conduction effect, pass through unit level-one 9 to No. 1 high-pressure heaters 21 of big bypass
The pipeline of vapour side makes the steam of boiler 1 smoothly reach 21 vapour side of No. 1 high-pressure heater, and pressure behind the first non-return valve 13
Higher than when pressure, first non-return valve 13 is automatically closed before first non-return valve 13,21 vapour side of No. 1 high-pressure heater is prevented
Aqueous reflux to level-one it is big bypass 9.
When this power station unit pipe-line system works normally, i.e. the 4th valve 4 and the first regulating valve 5 are open, described
Third valve 7 is opened as needed.
Second communicating pipe 14 is equipped with the 5th valve 15, the second regulating valve 16 and the second non-return valve 17.
Cutting is isolated No. 1 21 vapour side condensed water of high-pressure heater and is entered when the effect of 5th valve 15 is mainly closed
Oxygen-eliminating device 27；The effect that 5th valve 15 is opened is that No. 1 21 vapour side condensed water of high-pressure heater of conducting drains into oxygen-eliminating device 27.
5th valve 15 is the important operation valve for being connected to pipeline between No. 1 21 vapour side of high-pressure heater and oxygen-eliminating device 27.
The effect of second regulating valve 16 mainly adjusts the water that No. 1 21 vapour side of high-pressure heater drains into oxygen-eliminating device 27
Amount, keeps No. 1 21 stable level of high-pressure heater.Second regulating valve 16 is No. 1 21 vapour side of high-pressure heater of connection and removes
The important operation valve of pipeline between oxygen device 27.
The effect of second non-return valve 17 mainly prevents the aqueous reflux of oxygen-eliminating device 27 to No. 1 21 vapour of high-pressure heater
Side, second non-return valve 17 have one-way conduction effect, are made by the pipeline of No. 1 high-pressure heater 21 vapour side to oxygen-eliminating device 27
The water of No. 1 21 vapour side of high-pressure heater smoothly reaches oxygen-eliminating device 27, and pressure is higher than the second non-return valve behind the second non-return valve 17
Before 17 when pressure, the second non-return valve 17 is automatically closed, and prevents the aqueous reflux of oxygen-eliminating device 27 to No. 1 21 vapour side of high-pressure heater.
Drain pipe 18 is also connected between No. 1 high-pressure heater 21 and the condenser 30, the drain pipe 18 is used
In the hydrophobic of No. 1 high-pressure heater is guided to the condenser 30, the 6th valve 19 is provided on the drain pipe 18
With third regulating valve 20.
The effect of 6th valve 19 mainly when closed cutting isolation No. 1 21 vapour side condensed water of high-pressure heater into
Enter condenser 30；The effect that 6th valve 19 is opened is when logical No. 1 21 vapour side water level of high-pressure heater is higher than certain value
21 vapour side condensed water of No. 1 high-pressure heater is connected and drains into condenser 30.6th valve 19 is No. 1 high-pressure heater 21 of connection
The important operation valve of pipeline between vapour side and condenser 30.6th valve 19 described in when this power station unit pipe-line system puts into operation
It is opening state, the accident water discharging valve that the 6th valve 19 is run as No. 1 21 vapour side of high-pressure heater prevents No. 1
21 full water of high-pressure heater.
The effect of the third regulating valve 20 mainly when logical No. 1 21 vapour side water level of high-pressure heater is higher than certain value,
It adjusts the third regulating valve 20 and opens the flow velocity that water is drained into condenser 30, prevent high topped up with water and Turbine Safety.
Condensate pump 29 is provided between the condenser 30 and the low-pressure heater 28.
Feed pump 26 is provided between the oxygen-eliminating device 27 and the high-pressure heater connection group.
The operating process of this power station unit pipe-line system are as follows:
1 increasing temperature and pressure of boiler to set grid-connection stage, unit water supply enters boiler 1 by No. 1 21 water side of high-pressure heater,
When the big bypass 9 of unit level-one needs to open, confirmation: the first valve 11 and the second valve 12 are turned off, and the 6th valve 19 has been beaten
It opens, the investment of third regulating valve 20 automatically controls No. 1 21 water position status of high-pressure heater, and automatic control has been put into the second attemperator 6
System temperature state processed.The 4th valve 4 is slowly opened, the vapour for entering No. 1 high-pressure heater 21 is adjusted by the first regulating valve 5
Amount, guarantees No. 1 high-pressure heater 21 not superpressure, and the steam of the big bypass 9 of unit level-one at this time can be by the first communicating pipe 3 to No. 1
High-pressure heater 21 provides heat source, realizes heat recovery.After No. 1 21 stable level of high-pressure heater, the 5th valve is slowly opened
Door 15, the second regulating valve 16, which is put into, automatically controls No. 1 21 water level of high-pressure heater, the 6th valve 19 of slowly closing, at this time No. 1 height
It presses heater 21 hydrophobic and provides heat source and water supply to oxygen-eliminating device 27 by the second communicating pipe 14, realize working medium and heat recovery.For
Raising unit feed temperature, puts into, this power station unit pipe-line system can be retreated in set grid-connection as early as possible conducive to denitrating system
Out, until extracted steam from turbine can satisfy unit denitration investment needs.
When unit needs running on the lower load to run (i.e. depth peak regulation), if extracted steam from turbine cannot mention feed temperature
Height is put into operation with meeting denitrating system, can also put into this power station unit pipe-line system.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (9)
1. a kind of power station unit pipe-line system, which is characterized in that including boiler, live steam pipe, the big bypass of level-one, the first communicating pipe,
Second communicating pipe, high-pressure heater connection group, oxygen-eliminating device, low-pressure heater and condenser, the live steam pipe connect the boiler, institute
It states the big bypass of level-one and is separately connected the live steam pipe and the condenser, the condenser and the low-pressure heater pass through pipeline
Connection, the low-pressure heater and the oxygen-eliminating device pass through piping connection, the oxygen-eliminating device and the high-pressure heater connection group
Water side-entrance is separately connected the big bypass of the level-one and the high-pressure heater connection group first communicating pipe by piping connection
Vapour side-entrance, be separately connected the vapour side outlet and the oxygen-eliminating device of the high-pressure heater connection group second communicating pipe.
2. a kind of power station unit pipe-line system according to claim 1, which is characterized in that the high-pressure heater connection group packet
No. 1 high-pressure heater, No. 2 high-pressure heaters and No. 3 high-pressure heaters are included, No. 3 high-pressure heaters, No. 2 high pressures add
Hot device and No. 1 high-pressure heater are sequentially connected in series setting, the vapour side of No. 1 high-pressure heater along the flow direction of medium water
Import is connected with the first steam inlet pipe, and the vapour side-entrance of No. 2 high-pressure heaters is connected with the second steam inlet pipe, No. 3 high pressures
The vapour side-entrance of heater is connected with third steam inlet pipe, is separately connected the big bypass of the level-one and described the first communicating pipe
One steam inlet pipe.
3. a kind of power station unit pipe-line system according to claim 2, which is characterized in that first steam inlet pipe is connected with
Steam turbine is provided with the first valve and the second valve on first steam inlet pipe.
4. a kind of power station unit pipe-line system according to claim 1, which is characterized in that be arranged in the big bypass of level-one
There are third valve and the first attemperator.
5. a kind of power station unit pipe-line system according to claim 1, which is characterized in that first communicating pipe is equipped with
4th valve, the first regulating valve, the second attemperator and the first non-return valve.
6. a kind of power station unit pipe-line system according to claim 1, which is characterized in that second communicating pipe is equipped with
5th valve, the second regulating valve and the second non-return valve.
7. a kind of power station unit pipe-line system according to claim 2, which is characterized in that No. 1 high-pressure heater with
Drain pipe is also connected between the condenser, the drain pipe is used to the hydrophobic of No. 1 high-pressure heater being guided to institute
Condenser is stated, the 6th valve and third regulating valve are provided on the drain pipe.
8. a kind of power station unit pipe-line system according to claim 1, which is characterized in that the condenser and the low pressure
Condensate pump is provided between heater.
9. a kind of power station unit pipe-line system according to claim 1, which is characterized in that the oxygen-eliminating device and the high pressure
Feed pump is provided between heater connection group.
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| CN201810791048.7A CN108954291A (en) | 2018-07-18 | 2018-07-18 | A kind of power station unit pipe-line system |
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| CN201810791048.7A CN108954291A (en) | 2018-07-18 | 2018-07-18 | A kind of power station unit pipe-line system |
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