CN106051737A - Adjustable regenerative feedwater heating system and control method - Google Patents
Adjustable regenerative feedwater heating system and control method Download PDFInfo
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- CN106051737A CN106051737A CN201610611250.8A CN201610611250A CN106051737A CN 106051737 A CN106051737 A CN 106051737A CN 201610611250 A CN201610611250 A CN 201610611250A CN 106051737 A CN106051737 A CN 106051737A
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- 230000001172 regenerating effect Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 30
- 238000010438 heat treatment Methods 0.000 title abstract description 28
- 238000000605 extraction Methods 0.000 claims abstract description 300
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 451
- 230000033228 biological regulation Effects 0.000 claims description 167
- 230000009471 action Effects 0.000 claims description 14
- 239000011159 matrix material Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 abstract description 19
- 230000001105 regulatory effect Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 41
- 238000002156 mixing Methods 0.000 description 30
- 239000004744 fabric Substances 0.000 description 18
- 239000003245 coal Substances 0.000 description 8
- 238000011217 control strategy Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 238000009835 boiling Methods 0.000 description 5
- 230000008439 repair process Effects 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
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- 239000012736 aqueous medium Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
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- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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Classifications
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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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Turbines (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses an adjustable regenerative feedwater heating system for a thermal power plant. The adjustable regenerative feedwater heating system comprises a high-pressure cylinder of a steam turbine, a conventional final-stage steam extraction opening, a conventional final-stage feedwater heater, at least one steam cooler, an additional adjustable rear final-stage steam extraction opening, an adjustable rear final-stage feedwater heater, a steam extraction pipeline and an adjustable steam extraction regulating valve, wherein the conventional final-stage steam extraction opening and the conventional final-stage feedwater heater are arranged on the high-pressure cylinder; the additional adjustable rear final-stage steam extraction opening is arranged on the high-pressure cylinder, and the steam extraction pressure of the additional adjustable rear final-stage steam extraction opening is far higher than the conventional final-stage steam extraction pressure; the adjustable rear final-stage feedwater heater takes additional adjustable rear final-stage extraction steam as a heat source; the steam extraction pipeline is connected with the additional adjustable rear final-stage steam extraction opening and the adjustable rear final-stage feedwater heater; and the adjustable steam extraction regulating valve is arranged on the pipeline. Through controlling the additional adjustable rear final-stage steam extraction regulating valve to regulate the final feedwater temperature under different loads, all the safe operation, environment-friendly property and economical efficiency of equipment are considered simultaneously.
Description
Technical field
The present invention relates to field of thermal power, particularly relate to a kind of adjustable feed water heat regenerative for thermal power plant
And control method.
Background technology
Present stage, energy-saving and emission-reduction have become the strategic task of China's economy and society development.Reduce pollution, improve environment
Extremely urgent.And coal electricity is being currently the generation mode that China is main, it is again the main source of atmospheric pollution simultaneously, to this end, coal-fired
Power plant all have employed corresponding pollution reduction technology, to control its impact on air further.Denitration technology therein
Main employing SCR method (selective catalytic reduction), it is a kind of denitrating flue gas skill that application is most, technology is the most ripe in the world
Art.Using SCR method denitration, when boiler is in underrun when, SCR work cigarette temperature can not maintain.SCR has to move back
Go out to run, but now the NOx of boiler produces at concentrations up to 2-3 times during rated load.This means in the feelings with greater need for denitration
Under condition, SCR cannot function as on the contrary.To this end, the Chinese patent of Application No. CN201110459533.2 discloses a kind of adjustable
Water supply heat back system, for the most relatively conventional Turbo-generator Set, the final stage extraction pressure that high pressure cylinder is arranged is than routine
The highest extraction pressure of high pressure cylinder wants height；And extraction control valve is set on this final stage extraction line, then pass through feed-water heater
Carry out regenerative feed-water.In running, final stage can be drawn gas by this valve and be adjusted, thus keep the pressure after extraction control valve
Power is basically unchanged when unit varying duty, and is maintained the temperature of the feedwater of boiler to be basically unchanged by final stage feed-water heater；From
And solve tradition underload SCR and need problem out of service.Meanwhile, the China of Application No. CN201420700957.2
Patent is then on the basis of the above, is arranged to adjustable to the final stage extraction opening of high pressure cylinder, can set according to actual needs
Meter optimizes, and sets up at final stage extraction opening and can meet under safety premise, can according to the often residing operating load situation of unit with
And under underload, need the lifting denitration inlet flue gas temperature etc. reached to be actually needed final stage extraction opening optimized choice.Additionally, go back pin
This final stage feed-water heater is provided with feed water by-pass, and therefore final stage feed-water heater can arrange and help adding of feedwater capacity
Hot device, and can be set to the part heater to water capacity, so can reduce the cost of final stage feed-water heater, be simultaneous for one
For a little high parameter large-sized unit, it can be made again to be capable of in existing manufacturing process, reduce again cost simultaneously.
It practice, maintain the feed temperature of varying duty unit to be basically unchanged not necessarily condition, on the one hand, for different
Unit, under different load, the demand of feed temperature lifting capacity is also inconsistent.On the other hand, if under certain boundary conditions
The feed temperature maintaining underload higher is also possible to therefore sacrifice the part economy of unit and safety.
First, underload, after feed temperature promotes relatively, if the area of boiler heating surface increases the most accordingly, pot can be caused
The corresponding rising of stove exhaust gas temperature, and if be not provided with corresponding flue gas heat recovery system at boiler, or reclaim profit
Inadequate by degree, the part economy of unit can be sacrificed.
Secondly, for configuring the boiler of non-boiling formula economizer, feed temperature too high under underload, province's coal is easily caused
Device produces boiling, causes water-cooling wall hydrodynamic force problem, and serious situation causes water screen tube dry combustion method, final generation booster phenomenon.
Additionally, to maintain unit feed temperature under different load to be basically unchanged, then the vapour source dates of final stage extraction opening
Can higher, so when unit underload, it still has higher extraction pressure, so can maintain under underload with height
The feed temperature of load is basically unchanged.Such as, current part steam turbine type uses filling valve technology, has filling mouth, with this
Filling mouth, as final stage extraction opening (typically after high pressure cylinder the 5th grade), owing to its parameter is higher, the most still has relatively
High extraction pressure, therefore, even if during unit as little as 40% load, still having higher extraction pressure, can maintain it to water temperature
Degree is basically unchanged.But, when this can cause under unit high load capacity, can there is bigger restriction loss in final stage extraction control valve,
This can sacrifice a part of unit economy.Therefore, for the optimization angle of final stage extraction opening, due to the lifting capacity of feed temperature
It is that parameter of drawing gas with final stage is directly related, therefore to maintain unit feed temperature under different load to be basically unchanged, is unfavorable for
The optimization of final stage extraction opening.
To sum up, the feed temperature lifting capacity of adjustable feed water heat regenerative need to consider above-mentioned three aspect factor, according to
The different demands that feed temperature promotes are controlled and set.
Summary of the invention
In view of this, the invention provides a kind of adjustable feed water heat regenerative and control method, can be adjustable according to difference
The configuration system of formula water supply heat back system, carries out different control to unit feed temperature lifting capacity under different load and sets
Fixed.On the premise of guaranteeing equipment safety operation, it is achieved unit economy and the optimization of the feature of environmental protection.
A kind of adjustable feed water heat regenerative of present invention offer and control method, one of feature: in existing Application No.
On the basis of the Chinese patent of CN201110459533.2 and the Chinese patent of Application No. CN201420700957.2, it is controlled
Pattern has carried out breaking through and optimizing, and is no longer limited to maintain the control model that under different load, feed temperature is basically unchanged.But
Consider the selection of additional adjustable rear final stage extraction opening.The rationally selection of additional adjustable rear final stage extraction opening relates to machine
Operating load, the configuration of additional adjustable rear final stage feed-water heater capacity and high pressure cylinder structure etc. residing for group, boiler system
The configuration of system (relates to boiler economizer configuration, boiler heating surface situation and residual heat from boiler fume recycling system configuration feelings
Condition etc.), sliding pressure operation difference can be compared and bears on the basis of guaranteeing not occur boiling to run under economizer system is at different load
Additional adjustable rear final stage extraction pressure value under lotus and the additional adjustable rear final stage corresponding to most economical feed temperature value
Extraction pressure, (most economical feed temperature value: on the one hand, due to the relative lifting of feed temperature, is averagely absorbed heat to select optimum value
Temperature promotes, and the unit efficiency of cycle rises, and extraction flow of steam increases accordingly, decreases cold source energy, therefore improves
Unit economy；But then, due to the relative lifting of feed temperature, exhaust gas temperature can be caused to rise, this is certain
Unit economy is reduced again in degree.If under certain feed temperature, both comprehensive benefits are maximum, then claiming should be to water temperature
Degree is most economical feed temperature value).
A kind of adjustable feed water heat regenerative of present invention offer and control method, the two of feature: the control of the present invention
Method is applicable to the configuration system of different adjustable feed water heat regenerative, the Chinese patent of Application No. CN201110459533.2
Provide the adjustable feed water heat regenerative of a kind of basic configuration, and the Chinese patent of Application No. CN201420700957.2
It is configured with corresponding height on its basis and adds feed water by-pass, and it is true that in China of Application No. CN201110459533.2
On the basis of patent, according to the different configurations of vapour side and water side, multiple different configuration system also can be derived, and the control of the present invention
Method processed is applicable not only to the configuration system that these are different, and is no longer limited to maintain under different load feed temperature the most not
Becoming, therefore, the safe operation of equipment, environmental-protecting performance and economy all can be taken into account.
A kind of adjustable feed water heat regenerative that the present invention provides, it is characterised in that include
The high pressure cylinder of steam turbine；
Additional adjustable rear final stage extraction opening on described high pressure cylinder, the pressure of drawing gas of described additional adjustable rear final stage extraction opening
Power (according to solidifying water, flows to be ranked up, quite to aqueous medium higher than the non-dimmable formula final stage extraction pressure of described high pressure cylinder routine
The final stage not being adjusted in conventional rack is drawn gas)；
Draw gas the additional adjustable rear final stage feed-water heater as thermal source with the additional adjustable rear final stage of described high pressure cylinder；
Additional adjustable rear final stage extraction line, described additional adjustable rear final stage extraction line and described additional adjustable rear end
Level extraction opening and described additional adjustable rear final stage feed-water heater are connected；
It is arranged on the adjustable extraction control valve on described additional adjustable rear final stage extraction line, for described additional adjustable
After formula, drawing gas of final stage extraction line is adjusted, to control the extraction pressure after described adjustable extraction control valve to control
State the outlet temperature of additional adjustable rear final stage feed-water heater, meet required final feed temperature；
Further, it is characterised in that also include at least one steam condenser, wherein, at least one described steam condenser
Water side-entrance or the outlet of water side and described additional adjustable rear final stage feed-water heater be connected in series.
Alternatively, it is characterised in that also including at least one steam condenser, wherein, at least one described steam cools down
The water side of device is connected in parallel with water side-entrance or the outlet of described additional adjustable rear final stage feed-water heater.
Further, it is characterised in that also including that at least one water side regulates valve, wherein, at least one described water side is adjusted
Joint valve is connected in parallel with described additional adjustable rear final stage feed-water heater, and one with steam condenser string at least one described
Connection connects.
Alternatively, it is characterised in that also including that at least one water side regulates valve, wherein, at least one described water side regulates
Valve is connected in series with described additional adjustable rear final stage feed-water heater, and the most in parallel with steam condenser at least one described
Connect.
Alternatively, it is characterised in that also including that at least one water side regulates valve, wherein, at least one described water side regulates
Valve is connected in series with steam condenser at least one described, and company the most in parallel with additional adjustable rear final stage feed-water heater
Connect.
It should be noted that, the adjustable feed water heat regenerative of the present invention, the steam condenser of varying number, varying number
In series or in parallel with each other between water side regulation valve and additional adjustable rear final stage feed-water heater have various arrangement compound mode.
Any different permutation and combination methods carried out based on the said equipment, all should be at the protection domain being defined in the patent claims
In.
The control method of a kind of adjustable feed water heat regenerative that the present invention provides includes:
A () (includes economizer system, air preheater system, residual heat from boiler fume recycling system according to the configuration of steam generator system
And the configuring condition of denitrating catalyst system), guaranteeing not occur under economizer system is at different load boiling to run and
On the basis of meeting denitrating system operation, set the most economical feed temperature value under different load, and according to feedwater side system
Configuration (includes steam condenser, additional adjustable rear final stage feed-water heater water side bypass configuration situation and water side system even
Connect situation) the most economical feed temperature value conversion under different load is corresponded to additional adjustable rear final stage extraction pressure value.
B () selects reasonably additional adjustable rear final stage extraction opening, it is thus achieved that additional adjustable under sliding pressure operation different load
Final stage extraction pressure value after formula.
Additional adjustable rear final stage extraction pressure value under (c) comparison step (a) and (b) different load, under equal load,
If the additional adjustable rear final stage extraction pressure value of step (a) is more than the additional adjustable rear final stage extraction pressure value of step (b),
Then feed back to additional adjustable rear final stage extraction control valve with the additional adjustable rear final stage extraction pressure value of step (b), as
Its target controlled；Under equal load, if the additional adjustable rear final stage extraction pressure value of step (a) is less than the attached of step (b)
Add adjustable rear final stage extraction pressure value, then with the additional adjustable rear final stage extraction pressure value of step (a) feed back to additional can
Final stage extraction control valve after mode, the target controlled as it；Under equal load, if the additional adjustable rear final stage of step (a)
Extraction pressure value equal to the additional adjustable rear final stage extraction pressure value of step (b), then adding with step (a) or step (b)
Adjustable rear final stage extraction pressure value feeds back to additional adjustable rear final stage extraction control valve, the target controlled as it.
Correspondingly, for the control method of the adjustable feed water heat regenerative of the present invention, according to above-mentioned different permutation and combination
Scheme and the control method of correspondence, the most all should be in the protection domain being defined in the patent claims.
Below with reference to accompanying drawing, the technique effect of design, concrete structure and the generation of the present invention is described further, with
It is fully understood from the purpose of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is the first specific embodiment structural representation of the present invention.
Fig. 2 is the first specific embodiment control method curve comparison figure of the present invention.
Fig. 3, Fig. 4 are all the first specific embodiment control method curve judgement figures of the present invention.
Fig. 5 is the second specific embodiment structural representation of the present invention.
Fig. 6 is the 3rd specific embodiment structural representation of the present invention.
Fig. 7 is the 4th specific embodiment structural representation of the present invention.
Fig. 8 is the 5th specific embodiment structural representation of the present invention.
Fig. 9 is the 6th specific embodiment structural representation of the present invention.
Figure 10 is the 7th specific embodiment structural representation of the present invention.
Figure 11 is the 8th specific embodiment structural representation of the present invention.
Figure 12 is the 9th specific embodiment structural representation of the present invention.
Figure 13 is the tenth specific embodiment structural representation of the present invention.
Figure 14 is the 11st specific embodiment structural representation of the present invention.
Figure 15 is the 12nd specific embodiment structural representation of the present invention.
Figure 16 is the 13rd specific embodiment structural representation of the present invention.
Figure 17 is the 14th specific embodiment structural representation of the present invention.
Figure 18 is the 15th specific embodiment structural representation of the present invention.
Figure 19 is the 16th specific embodiment structural representation of the present invention.
Figure 20 is the 17th specific embodiment structural representation of the present invention.
Figure 21 is the 18th specific embodiment structural representation of the present invention.
Figure 22 is the 19th specific embodiment structural representation of the present invention.
Figure 23 is the 20th specific embodiment structural representation of the present invention.
Figure 24 is the 21st specific embodiment structural representation of the present invention.
Figure 25 is the 22nd specific embodiment structural representation of the present invention.
Figure 26 is the 23rd specific embodiment structural representation of the present invention.
Figure 27 is the 24th specific embodiment structural representation of the present invention.
Figure 28 is the 25th specific embodiment structural representation of the present invention.
Figure 29 is the 26th specific embodiment structural representation of the present invention.
Figure 30 is the 27th specific embodiment structural representation of the present invention.
Figure 31 is the 28th specific embodiment structural representation of the present invention.
Figure 32 is the 29th specific embodiment structural representation of the present invention.
Figure 33 is the 30th specific embodiment structural representation of the present invention.
Figure 34 is the 31st specific embodiment structural representation of the present invention.
Figure 35 is the 32nd specific embodiment structural representation of the present invention.
Figure 36 is the 33rd specific embodiment structural representation of the present invention.
Figure 37 is the 34th specific embodiment structural representation of the present invention.
Figure 38 is the 35th specific embodiment structural representation of the present invention.
Figure 39 is the 36th specific embodiment structural representation of the present invention.
Figure 40 is the 37th specific embodiment structural representation of the present invention.
Figure 41 is the 38th specific embodiment structural representation of the present invention.
Figure 42 is the 39th specific embodiment structural representation of the present invention.
Figure 43 is the 40th specific embodiment structural representation of the present invention.
Figure 44 is the 41st specific embodiment structural representation of the present invention.
Figure 45 is the 42nd specific embodiment structural representation of the present invention.
Wherein, 0-adds adjustable rear final stage extraction opening；The final stage extraction opening that 1-is conventional；Other conventional system of 3-；4-is high
Cylinder pressure enters vapour；5-high pressure cylinder；6-finally feeds water；7-water side regulation valve；The final stage extraction line that 10-is conventional；The final stage that 11-is conventional
Feed-water heater；00-adds adjustable rear final stage extraction line；00 '-extraction line, 01-adds the feedwater of adjustable rear final stage
Heater；02-adds adjustable rear final stage extraction control valve；20-steam condenser enter vapour；21-steam condenser.
Detailed description of the invention one
Fig. 1 is first specific embodiment of the present invention, and the present embodiment draws gas 10 and final stage in conventional final stage extraction opening 1, final stage
On the basis of feed-water heater 11, the additional adjustable rear final stage extraction opening 0 being additionally arranged on high pressure cylinder 5, additional adjustable rear final stage
Extraction line 00, additional adjustable rear final stage feed-water heater 01, additional adjustable rear final stage feed-water heater 01 is by additional
Adjustable rear final stage extraction line 00 is connected with the additional adjustable rear final stage extraction opening 0 on high pressure cylinder 5, and with conventional final stage
Feed-water heater 11 is connected.Additional adjustable rear final stage extraction line 00 is provided with additional adjustable rear final stage extraction regulation
Valve 02, for being adjusted additional adjustable rear drawing gas of final stage extraction line 00, by controlling additional adjustable rear final stage
Pressure after extraction control valve 02 controls the feed temperature of additional adjustable rear final stage feed-water heater 01 outlet, additional adjustable
After formula, the feedwater of final stage feed-water heater 01 outlet is drawn gas 20 heating further by steam condenser 21 again, and described steam is cold
But device 21 thermal source is that other conventional high temperature draws gas.
Being described in detail the control method of the present invention with the example of certain power plant 1000MW unit, wherein steam turbine is
Ultra supercritical single shaft, single reheat, four cylinder four exhaust condensing turbines.
First, it is contemplated that boiler economizer configuration non-boiling formula, air preheater area are by still configuring for traditional design, more than flue gas
The recyclable degree of pick up the heat system the highest and denitrating catalyst factor the most high to temperature requirement relatively.According to meter
Calculate, it may be determined that this unit most economical feed temperature value under different load, simultaneously, it is contemplated that feedwater side system, is by steam
Cooler is connected in series with additional adjustable rear final stage feed-water heater, and according to current direction, steam condenser is arranged in
After additional adjustable rear final stage feed-water heater, therefore the most economical feed temperature value under different load is deducted steam cooling
After the temperature rise of device 21, the upper end adding additional adjustable rear final stage feed-water heater 01 is poor, the saturation pressure that this temperature value is corresponding
Force value just corresponds to additional adjustable rear final stage extraction pressure value.
Secondly, according to high pressure cylinder structure, the operating load etc. that unit is often residing, described in optimized choice additional adjustable after
The particular location of final stage extraction opening, therefore can obtain additional adjustable rear final stage extraction opening sliding pressure operation under different load corresponding
Additional adjustable rear final stage extraction pressure value.
By comparing the additional adjustable rear final stage extraction pressure that under equal load, the conversion of most economical feed temperature value is corresponding
It is worth the additional adjustable rear final stage extraction pressure value corresponding with additional adjustable rear final stage extraction opening sliding pressure operation, just can determine that attached
Add the control strategy of adjustable rear final stage extraction control valve.When, under equal load, most economical feed temperature value changes the attached of correspondence
After adding additional adjustable corresponding less than additional adjustable rear final stage extraction opening sliding pressure operation of adjustable rear final stage extraction pressure value
During final stage extraction pressure value, then the additional adjustable rear final stage extraction pressure that under this load, the conversion of most economical feed temperature value is corresponding
It is worth the control target as additional adjustable rear final stage extraction control valve；When, under equal load, most economical feed temperature value is changed
The additional adjustable rear final stage that corresponding additional adjustable rear final stage extraction pressure value is corresponding more than final stage extraction opening sliding pressure operation
During extraction pressure value, then the additional adjustable rear final stage that under this load, additional adjustable rear final stage extraction opening sliding pressure operation is corresponding is taken out
Vapour pressure force value is as the control target of additional adjustable rear final stage extraction control valve.
Such as, when optimized choice additional adjustable after final stage extraction opening drawing gas under unit declared working condition (1000WM)
When pressure is respectively 15.05MPa(extraction opening a), 9.76 MPa(extraction opening b), under different load, most economical feed temperature is corresponding
Final stage extraction pressure draw gas with bleeding point a, the bleeding point b final stage that the sliding pressure operation of final stage extraction opening is corresponding under different load pressure
Power is as shown in Figure 2.By comparing the final stage extraction pressure value and final stage that under equal load, the conversion of most economical feed temperature value is corresponding
The final stage extraction pressure value that extraction opening sliding pressure operation is corresponding, according to the control plan of aforementioned additional adjustable rear final stage extraction control valve
Slightly, for extraction opening a, the control target of additional adjustable rear final stage extraction control valve is as shown in Figure 3；For extraction opening b, additional
The control target of adjustable rear final stage extraction control valve is as shown in Figure 4.When optimized choice other add adjustable after final stage take out
After steam ports, its control target adding adjustable rear final stage extraction control valve can be determined by foregoing, the most superfluous
State.
Detailed description of the invention two
Fig. 5 is second specific embodiment of the present invention, the present embodiment and the difference of embodiment one, in system structure layout, and steam
Cooler 21 is in the import of additional adjustable rear final stage feed-water heater 01, i.e. feeds water at conventional final stage feed-water heater 11
After heated, then heating through steam condenser 21, the most additional adjustable rear final stage feed-water heater 01 heats.Due to attached
The outlet feed temperature adding adjustable rear final stage feed-water heater 01 is final feed temperature, therefore with the control of embodiment one
Method processed difference is, now, most economical feed temperature value is poor sum with the upper end of additional adjustable rear final stage feed-water heater,
The saturation pressure force value of its correspondence is additional adjustable rear final stage extraction pressure value.Similarly, other and embodiment one step one
Cause, i.e. obtain the additional adjustable rear final stage that additional adjustable rear final stage extraction opening sliding pressure operation is corresponding under different load and draw gas pressure
Both are compared by force value, the final control target obtaining additional adjustable rear final stage extraction control valve 02, the most superfluous
State.
It should be noted that, in the present embodiment, steam condenser 21 is in fact in order to utilize other conventional high temperature to draw gas
The degree of superheat, heats feedwater the most further, it practice, can not also be configured, if without steam condenser 21, is only additional
The inlet temperature of adjustable rear final stage feed-water heater 01 is varied from, and the control strategy of whole system is the most constant.
Detailed description of the invention three
Fig. 6 is the 3rd specific embodiment of the present invention, and the present embodiment is relatively close to embodiment two relatively, both is contrasted, is
System structure is arranged, is distinguished as: the additional adjustable rear final stage feed-water heater 01 of the present embodiment is provided with water side and bypasses, and
Regulate valve 7 at least provided with water side in the bypass of water side, also can arrange barrier valve before and after certain water side regulation valve, in order to isolation regulation
Valve on-bne repair.Owing to being additionally arranged the bypass of water side, therefore add adjustable rear final stage feed-water heater 01 and can be set to part appearance
Amount.On the one hand the difficulty in the manufacturing process of high parameter full capacity feed-water heater is avoided.Still further aspect, reduces feedwater
The cost of heater.
The present embodiment is with the control method difference of embodiment two, and now, what most economical feed temperature value was corresponding is attached
Add the feed temperature mixed number of adjustable rear final stage feed-water heater 01 and water side regulation valve 7 outlet.Owing to flowing through the bypass of water side
This part feedwater heat without additional adjustable rear final stage feed-water heater 01, therefore, water side bypass feed temperature reality
The feed temperature of additional adjustable rear final stage feed-water heater 01 import is equivalent on border, and by controlling by-pass water side regulation valve
7, can control to be further separated into the feedwater flow of additional adjustable rear final stage feed-water heater, therefore, additional by jointly controlling
Adjustable rear final stage extraction control valve 02 and water side regulation valve 7, can finally control additional adjustable rear final stage feed-water heater 01
Feed temperature mixed number with water side regulation valve 7 outlet.
Therefore, the control strategy of the present embodiment is:
First, according to situations such as steam generator system configurations, determine this unit most economical feed temperature value under different load, its
Secondary, according to turbine high-pressure cylinder structure, the operating load etc. that unit is often residing, determine the additional adjustable rear end of optimized choice
Level extraction opening, and then determine that different load adds the additional adjustable rear final stage that adjustable rear final stage extraction opening sliding pressure operation is corresponding
Extraction pressure value.So that it is determined that the adjustable extent of additional adjustable rear final stage extraction control valve.
Feed temperature value most economical under different load is regulated as additional adjustable rear final stage extraction control valve and water side
Valve jointly control target.
During two regulation valves jointly control, on the premise of meeting most economical feed temperature value, should by additional can
After mode, the aperture of final stage extraction control valve 02 is as the first adjustment action, i.e. drives big additional adjustable rear final stage extraction control valve
02, to reduce restriction loss of drawing gas, water side regulation valve 7, as the second adjustment action, fitting into Row sum-equal matrix, reaching control until adjusting
Target processed.
Detailed description of the invention four
Fig. 7 is the 4th specific embodiment of the present invention, the present embodiment and embodiment three relatively close to, it is right both to be carried out
Ratio, in system structure layout, the main distinction is: in the present embodiment, and steam condenser 21 is arranged on the bypass of band water side and water
After the additional adjustable rear top heater 01 of side regulation valve 7 (according to current direction), now, most economical feed temperature value button
After the temperature rise of steam condenser 21, corresponding is that additional adjustable rear final stage feed-water heater 01 regulates valve 7 with by-pass water side
The feed temperature mixed number of outlet.Therefore, the control method of the present embodiment need to be by different from differring primarily in that of embodiment three
Under load after the temperature rise of most economical feed temperature value deduction steam condenser 21, it is re-used as additional adjustable rear final stage extraction regulation
Valve 02 and water side regulation valve 7 jointly control target.
The control strategy of the present embodiment is:
First, according to situations such as steam generator system configurations, determine this unit most economical feed temperature value under different load, its
Secondary, according to turbine high-pressure cylinder structure, the operating load etc. that unit is often residing, determine the additional adjustable rear end of optimized choice
Level extraction opening, and then determine that different load adds the additional adjustable rear final stage that adjustable rear final stage extraction opening sliding pressure operation is corresponding
Extraction pressure value.So that it is determined that the adjustable extent of extraction control valve.
Under different load after the temperature rise of most economical feed temperature value deduction steam condenser 21, be re-used as additional adjustable after
Final stage extraction control valve 02 and water side regulation valve 7 jointly control target.
During two regulation valves jointly control, on the premise of meeting most economical feed temperature value, should by additional can
After mode, the aperture of final stage extraction control valve 02 is as the first adjustment action, i.e. drives big additional adjustable rear final stage extraction control valve
02, to reduce restriction loss of drawing gas, water side regulation valve 7, as the second adjustment action, fitting into Row sum-equal matrix, reaching control until adjusting
Target processed.
Detailed description of the invention five
Fig. 8 is the 5th specific embodiment of the present invention, and the present embodiment draws gas 10 and final stage in conventional final stage extraction opening 1, final stage
On the basis of feed-water heater 11, the additional adjustable rear final stage extraction opening 0 being additionally arranged on high pressure cylinder 5, additional adjustable rear final stage
Extraction line 00, additional adjustable rear final stage feed-water heater 01, additional adjustable rear final stage feed-water heater 01 is by additional
Adjustable rear final stage extraction line 00 is connected with the additional adjustable rear final stage extraction opening 0 on high pressure cylinder 5, additional adjustable after
Additional adjustable rear final stage extraction control valve 02 it is provided with, for additional adjustable rear final stage is drawn gas on final stage extraction line 00
Drawing gas of pipeline 00 is adjusted, by the pressure after controlling additional adjustable rear final stage extraction control valve 02 control additional can
The feed temperature of final stage feed-water heater 01 outlet after mode, simultaneously in the water side of additional adjustable rear final stage feed-water heater 01
Regulation valve 7 is set on pipeline, is connected in parallel with steam condenser 21, and together with conventional final stage feed-water heater 11 company of series connection
Connect.The feedwater of final stage feed-water heater 11 outlet is split into two parts, a part through add adjustable after final stage feed-water heater
01 heating, a part heats through steam condenser 21, then both mixing, enters boiler as final feedwater together and saves coal
Device.Regulation valve 7 is set on additional adjustable rear final stage feed-water heater 01, can be used to control and regulation and be further separated into additional adjustable
Final stage feed-water heater 01 and the feedwater flow of steam condenser 21 after formula, thus feed temperature final after controlling mixing.Need
Illustrating, this regulation valve also may be installed one end of steam condenser 21, and its major function is identical, is also for controlling to adjust
It is further separated into the feedwater flow of additional adjustable rear final stage feed-water heater 01 and steam condenser 21.Certainly also can be cold at steam
But device 21 or additional adjustable rear final stage feed-water heater side install barrier valve additional, are used for completely cutting off, and facilitate that on-bne repair completely cuts off is
System.
Difference with embodiment one is, in system structure layout, steam condenser 21 is given with additional adjustable rear final stage
The non-series connection of water heater 01 but be connected in parallel.Owing to final feed temperature is that additional adjustable rear final stage feed-water heater 01 goes out
Mouth exports, with steam condenser 21, the feed temperature mixed.The most in the present embodiment, its control method and the master of embodiment one
Distinguishing and be, now, most economical feed temperature is that additional adjustable rear final stage extraction control valve 02 is common with water side regulation valve 7
The result of combine regulation.By controlling additional adjustable rear final stage extraction control valve 02, can control additional adjustable rear final stage to
The feed temperature of water heater 01 outlet；By controlling water side regulation valve 7, can control to enter additional adjustable rear final stage feedwater and add
The feedwater flow of hot device 01, jointly controls the two regulation valve and just can control additional adjustable rear final stage feed-water heater 01 and export
The feed temperature mixed is exported with steam condenser 21.
Therefore, the control strategy of the present embodiment is:
First, according to situations such as steam generator system configurations, determine this unit most economical feed temperature value under different load, its
Secondary, according to turbine high-pressure cylinder structure, the operating load etc. that unit is often residing, determine the additional adjustable rear end of optimized choice
Level extraction opening, and then determine that different load adds the additional adjustable rear final stage that adjustable rear final stage extraction opening sliding pressure operation is corresponding
Extraction pressure value.So that it is determined that the scalable pressure limit of additional adjustable rear final stage extraction control valve 02.
Feed temperature value most economical under different load is regulated as additional adjustable rear final stage extraction control valve and water side
Valve jointly control target.
During two regulation valves jointly control, on the premise of meeting most economical feed temperature value, should by additional can
After mode, the aperture of final stage extraction control valve 02 is as the first adjustment action, i.e. drives big additional adjustable rear final stage extraction control valve
02, to reduce restriction loss of drawing gas, water side regulation valve 7, as the second adjustment action, fitting into Row sum-equal matrix, reaching control until adjusting
Target processed.
Meanwhile, feed temperature value is exported for avoiding final stage feed-water heater 01 to export feed temperature value and steam condenser 21
Have big difference, be unfavorable for the safety of tubing, a maximum difference can be manually set, regulate valve 7 as water side and add
One feedback factor of adjustable rear final stage extraction control valve 02, once exceedes this safe difference, then two regulation valves can join
Close regulation, control this difference in safety range.
Detailed description of the invention six
Fig. 9 is the 6th specific embodiment of the present invention, the present embodiment and the difference of embodiment one, in system structure layout, sets up
One steam condenser 03 and extraction line 00 ', additional adjustable rear final stage draw gas the most successively through add adjustable after final stage
Extraction line 00 and additional adjustable rear final stage extraction control valve 02 enter steam condenser 03 heating feedwater, the most again through drawing gas
Pipeline 00 ' enters additional adjustable rear final stage feed-water heater 01 heating feedwater, and described steam condenser 03 is disposed in series in steaming
In the middle of vapour cooler 21 and additional adjustable rear final stage feed-water heater 01, feed water at conventional final stage feed-water heater 11 through adding
After heat, through additional adjustable after final stage feed-water heater 01 heat, then heat through steam condenser 03, cool down to steam the most again
Device 21 heats.Therefore the most economical feed temperature value under different load is deducted steam condenser 21 and the temperature of steam condenser 03
After Shenging, the upper end adding additional adjustable rear final stage feed-water heater 01 is poor, and the saturation pressure force value that this temperature value is corresponding is the most right
Should be additional adjustable rear final stage extraction pressure value.Same, additional adjustable rear final stage extraction opening under different load can be obtained
Both are compared by additional adjustable rear final stage extraction pressure value that sliding pressure operation is corresponding the most again, and final acquisition is additional can
The control target of final stage extraction control valve 02 after mode, remaining control mode is identical with embodiment one, and here is omitted.
Detailed description of the invention seven
Figure 10 is the 7th specific embodiment of the present invention, the present embodiment and the difference of embodiment six, in system structure layout, described
Steam condenser 21 is disposed in series in the middle of steam condenser 03 and additional adjustable rear final stage feed-water heater 01, and feedwater is often
After the final stage feed-water heater 11 of rule is heated, through additional adjustable after final stage feed-water heater 01 heat, then through steam cooling
Device 21 heats, and heats to steam condenser 03 the most again.Same, the most economical feed temperature value under different load is deducted and steams
After the temperature rise of vapour cooler 03 and steam condenser 21, the upper end adding additional adjustable rear final stage feed-water heater 01 is poor,
The saturation pressure force value that this temperature value is corresponding just corresponds to additional adjustable rear final stage extraction pressure value.Same, difference can be obtained
Both are entered by the additional adjustable rear final stage extraction pressure value that under load, additional adjustable rear final stage extraction opening sliding pressure operation is corresponding
Row compares, the final control target obtaining additional adjustable rear final stage extraction control valve 02, remaining control mode and embodiment one
Identical, here is omitted.
Detailed description of the invention eight
Figure 11 is the 8th specific embodiment of the present invention, the present embodiment and the difference of embodiment six, in system structure layout, described
Additional adjustable rear final stage feed-water heater 01 is disposed in series in the middle of steam condenser 21 and steam condenser 03, and feedwater is often
After the final stage feed-water heater 11 of rule is heated, heat through steam condenser 03, then through additional adjustable after final stage feedwater heat
Device 01 heats, and heats to steam condenser 21 the most again.Therefore, the most economical feed temperature value under different load is deducted steam
After cooler 21 temperature rise, the upper end adding additional adjustable rear final stage feed-water heater 01 is poor, corresponding saturated of this temperature value
Force value just corresponds to additional adjustable rear final stage extraction pressure value.Same, can obtain under different load additional adjustable after
Both are compared by the additional adjustable rear final stage extraction pressure value that final stage extraction opening sliding pressure operation is corresponding, and final acquisition is attached
Adding the control target of adjustable rear final stage extraction control valve 02, remaining control mode is identical with embodiment one, and here is omitted.
Detailed description of the invention nine
Figure 12 is the 9th specific embodiment of the present invention, the present embodiment and the difference of embodiment eight, in system structure layout, described
Additional adjustable rear final stage feed-water heater 01 is disposed in series in the middle of steam condenser 03 and steam condenser 21, and feedwater is often
After the final stage feed-water heater 11 of rule is heated, heat through steam condenser 21, then through additional adjustable after final stage feedwater heat
Device 01 heats, and heats to steam condenser 03 the most again.Therefore, the most economical feed temperature value under different load is deducted steam
After cooler 03 temperature rise, the upper end adding additional adjustable rear final stage feed-water heater 01 is poor, corresponding saturated of this temperature value
Force value just corresponds to additional adjustable rear final stage extraction pressure value.Same, can obtain under different load additional adjustable after
Both are compared by the additional adjustable rear final stage extraction pressure value that final stage extraction opening sliding pressure operation is corresponding, and final acquisition is attached
Adding the control target of adjustable rear final stage extraction control valve 02, remaining control mode is identical with embodiment one, and here is omitted.
Detailed description of the invention ten
Figure 13 is the tenth specific embodiment of the present invention, the present embodiment and the difference of embodiment eight, in system structure layout, described
Steam condenser 21 is disposed in series in the middle of additional adjustable rear final stage feed-water heater 01 and steam condenser 03, and feedwater is often
Rule final stage feed-water heater 11 heated after, heat through steam condenser 03, then heat through steam condenser 21, the most extremely
Additional adjustable rear final stage feed-water heater 01 heats.Therefore, by the most economical feed temperature value under different load plus additional
The upper end of adjustable rear final stage feed-water heater 01 is poor, saturation pressure force value corresponding to this temperature value just correspond to additional adjustable after
Final stage extraction pressure value.Same, corresponding attached of additional adjustable rear final stage extraction opening sliding pressure operation under different load can be obtained
Adding adjustable rear final stage extraction pressure value, both compared, final acquisition adds adjustable rear final stage extraction control valve 02
Control target, remaining control mode is identical with embodiment one, and here is omitted.
Detailed description of the invention 11
Figure 14 is the 11st specific embodiment of the present invention, the present embodiment and the difference of embodiment ten, in system structure layout, and institute
State steam condenser 03 and be disposed in series in the middle of additional adjustable rear final stage feed-water heater 01 and steam condenser 21, feed water
After conventional final stage feed-water heater 11 is heated, heats through steam condenser 21, then heat through steam condenser 03, the most again
Heat to additional adjustable rear final stage feed-water heater 01.Therefore, by the most economical feed temperature value under different load plus attached
The upper end adding adjustable rear final stage feed-water heater 01 is poor, and the saturation pressure force value that this temperature value is corresponding just corresponds to additional adjustable
Rear final stage extraction pressure value.Same, additional adjustable rear final stage extraction opening sliding pressure operation under different load can be obtained corresponding
Both are compared by additional adjustable rear final stage extraction pressure value, and final acquisition adds adjustable rear final stage extraction control valve
The control target of 02, remaining control mode is identical with embodiment one, and here is omitted.
Detailed description of the invention 12
Figure 15 is the 12nd specific embodiment of the present invention, the present embodiment and the difference of embodiment six, in system structure layout, this
The additional adjustable rear final stage feed-water heater 01 of embodiment is provided with the bypass of water side, and at least provided with water side in the bypass of water side
Regulation valve 7, also can arrange barrier valve before and after certain water side regulation valve, in order to isolation regulation valve on-bne repair.Owing to being additionally arranged
Water side bypasses, and therefore adds adjustable rear final stage feed-water heater 01 and can be set to portion capacity.On the one hand high parameter is avoided
Difficulty in the manufacturing process of full capacity feed-water heater.Still further aspect, reduces the cost of feed-water heater.
Now, the import feed temperature of steam condenser 03 is adjusted with water side for additional adjustable rear final stage feed-water heater 01
The feed temperature mixed number of joint valve 7 outlet.Therefore, the feed temperature of water side bypass is effectively equivalent to additional adjustable rear final stage
The feed temperature of feed-water heater 01 import, and by controlling by-pass water side regulation valve 7, can control to be further separated into additional adjustable
The feedwater flow of final stage feed-water heater after formula, therefore, by jointly control additional adjustable rear final stage extraction control valve 02 and
Water side regulation valve 7, can control additional adjustable rear final stage feed-water heater 01 and mix with the feed temperature of water side regulation valve 7 outlet
Value.
Now, the most economical feed temperature value under different load is deducted steam condenser 21 and the temperature of steam condenser 03
After Shenging, just obtain the feed temperature mixed number of additional adjustable rear final stage feed-water heater 01 and water side regulation valve 7 outlet.
Therefore, the control strategy of the present embodiment is:
First, according to situations such as steam generator system configurations, determine this unit most economical feed temperature value under different load, its
Secondary, according to turbine high-pressure cylinder structure, the operating load etc. that unit is often residing, determine the additional adjustable rear end of optimized choice
Level extraction opening, and then determine that different load adds the additional adjustable rear final stage that adjustable rear final stage extraction opening sliding pressure operation is corresponding
Extraction pressure value.So that it is determined that the adjustable extent of extraction control valve.
After the temperature rise of most economical feed temperature value deduction steam condenser 21 and steam condenser 03 under different load
Value jointly controls target as additional adjustable rear final stage extraction control valve and water side regulation valve.
During two regulation valves jointly control, on the premise of meeting most economical feed temperature value, should by additional can
After mode, the aperture of final stage extraction control valve 02 is as the first adjustment action, i.e. drives big additional adjustable rear final stage extraction control valve
02, to reduce restriction loss of drawing gas, water side regulation valve 7, as the second adjustment action, fitting into Row sum-equal matrix, reaching control until adjusting
Target processed.
Detailed description of the invention 13
Figure 16 is the 13rd specific embodiment of the present invention, the present embodiment and the difference of embodiment 12, in system structure layout,
Described steam condenser 21 is disposed in series in additional adjustable rear final stage feed-water heater 01 and bypass thereof and steam condenser 03
Centre, feeds water after conventional final stage feed-water heater 11 is heated, through add adjustable after final stage feed-water heater 01 and
Bypass heating, then heats through steam condenser 21, heats to steam condenser 03 the most again.Therefore, by under different load
After the temperature rise of economic feed temperature value deduction steam condenser 03 and steam condenser 21, just obtain additional adjustable rear final stage to
The feed temperature mixed number that water heater 01 exports with water side regulation valve 7.Now, by feed temperature value most economical under different load
Value after the temperature rise of deduction steam condenser 21 and steam condenser 03 as additional adjustable rear final stage extraction control valve 02 and
Water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 12, and here is omitted.
Detailed description of the invention 14
Figure 17 is the 14th specific embodiment of the present invention, the present embodiment and the difference of embodiment 12, in system structure layout,
Described additional adjustable rear final stage feed-water heater 01 and bypass thereof are disposed in series in steam condenser 21 and steam condenser 03
Centre, feeds water after conventional final stage feed-water heater 11 is heated, heats through steam condenser 03, then through add adjustable after
Final stage feed-water heater 01 and bypass heating thereof, heat to steam condenser 21 the most again.Therefore, by the warp under different load
After the temperature rise of Ji feed temperature value deduction steam condenser 21, just obtain additional adjustable rear final stage feed-water heater 01 and water side
The feed temperature mixed number of regulation valve 7 outlet.Now, by most economical feed temperature value deduction steam condenser 21 under different load
Temperature rise after value jointly control target as additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7, remaining
Control mode is identical with embodiment 12, and here is omitted.
Detailed description of the invention 15
Figure 18 is the 15th specific embodiment of the present invention, the present embodiment and the difference of embodiment 14, in system structure layout,
Described additional adjustable rear final stage feed-water heater 01 and bypass thereof are disposed in series in steam condenser 03 and steam condenser 21
Centre, feeds water after conventional final stage feed-water heater 11 is heated, heats through steam condenser 21, then through add adjustable after
Final stage feed-water heater 01 and bypass heating thereof, heat to steam condenser 03 the most again.Therefore, by the warp under different load
After the temperature rise of Ji feed temperature value deduction steam condenser 03, just obtain additional adjustable rear final stage feed-water heater 01 and water side
The feed temperature mixed number of regulation valve 7 outlet.Now, by most economical feed temperature value deduction steam condenser 03 under different load
Temperature rise after value jointly control target as additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7, remaining
Control mode is identical with embodiment 12, and here is omitted.
Detailed description of the invention 16
Figure 19 is the 16th specific embodiment of the present invention, the present embodiment and the difference of embodiment 14, in system structure layout,
Described additional adjustable rear final stage feed-water heater 01 and bypass thereof are disposed in series in steam condenser 21 and steam condenser 03
Centre, feeds water after conventional final stage feed-water heater 11 is heated, heats through steam condenser 03, then through add adjustable after
Final stage feed-water heater 01 and bypass heating thereof, heat to steam condenser 21 the most again.Therefore, by the warp under different load
After the temperature rise of Ji feed temperature value deduction steam condenser 21, just obtain additional adjustable rear final stage feed-water heater 01 and water side
The feed temperature mixed number of regulation valve 7 outlet.Now, by most economical feed temperature value deduction steam condenser 21 under different load
Temperature rise after value jointly control target as additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7, remaining
Control mode is identical with embodiment 12, and here is omitted.
Detailed description of the invention 17
Figure 20 is the 17th specific embodiment of the present invention, the present embodiment and the difference of embodiment 16, in system structure layout,
Described steam condenser 21 is disposed in series in additional adjustable rear final stage feed-water heater 01 and bypass thereof and steam condenser 03
Centre, feeds water after the final stage feed-water heater 11 of routine is heated, heats through steam condenser 03, then through steam condenser 21
Heating, the most again to additional adjustable rear final stage feed-water heater 01 and bypass heating thereof.Therefore, most economical under different load
Feed temperature value is the feed temperature mixed number of additional adjustable rear final stage feed-water heater 01 and water side regulation valve 7 outlet.
Now, feed temperature value most economical under different load is regulated valve as additional adjustable rear final stage extraction control valve 02 and water side
7 jointly control target, remaining control mode is identical with embodiment 12, and here is omitted.
Detailed description of the invention 18
Figure 21 is the 18th specific embodiment of the present invention, the present embodiment and the difference of embodiment 16, in system structure layout,
Described steam condenser 03 is disposed in series in additional adjustable rear final stage feed-water heater 01 and bypass thereof and steam condenser 21
Centre, feeds water after the final stage feed-water heater 11 of routine is heated, heats through steam condenser 21, then through steam condenser 03
Heating, the most again to additional adjustable rear final stage feed-water heater 01 and bypass heating thereof.Therefore, most economical under different load
Feed temperature value is the feed temperature mixed number of additional adjustable rear final stage feed-water heater 01 and water side regulation valve 7 outlet.
Now, feed temperature value most economical under different load is regulated valve as additional adjustable rear final stage extraction control valve 02 and water side
7 jointly control target, remaining control mode is identical with embodiment 12, and here is omitted.
Detailed description of the invention 19
Figure 22 is the 19th specific embodiment of the present invention, and the present embodiment draws gas 10 and end in conventional final stage extraction opening 1, final stage
On the basis of level feed-water heater 11, the additional adjustable rear final stage extraction opening 0 being additionally arranged on high pressure cylinder 5, additional adjustable rear end
Level extraction line 00, additional adjustable rear final stage extraction control valve 02, extraction line 00 ', steam condenser 03 and additional adjustable
Final stage feed-water heater 01 after formula.Additional adjustable rear final stage draw gas the most successively through add adjustable after final stage extraction line 00 He
Additional adjustable rear final stage extraction control valve 02 enters steam condenser 03 heating feedwater, enters through extraction line 00 ' the most again
Additional adjustable rear final stage feed-water heater 01 heating feedwater.
Meanwhile, the water side ducts of additional adjustable rear final stage feed-water heater 01 arranges regulation valve 7, cools down with steam
Device 03 is connected in parallel, and is connected in series with conventional final stage feed-water heater 11 together.Additional adjustable rear final stage is utilized to draw gas
Additional adjustable rear drawing gas of final stage extraction line 00 is adjusted by regulation valve 02, and then the additional adjustable rear final stage of control is taken out
Pressure after steam control valve 02；The feedwater of final stage feed-water heater 11 outlet is split into two parts, and a part is through additional adjustable
Rear final stage feed-water heater 01 heats, and a part heats through steam condenser 03, then both mixing, as final feedwater one
Road enters in steam condenser 21 and heats, and finally enters boiler economizer.Additional adjustable rear final stage feed-water heater 01
On regulation valve 7 is set, can be used to control and regulation and be further separated into additional adjustable rear final stage feed-water heater 01 and cool down with steam
The feedwater flow of device 03.Therefore, add adjustable rear final stage extraction control valve 02 and regulation valve 7 by combine regulation, control
The temperature of feedwater after additional adjustable rear final stage feed-water heater 01 and steam condenser 03 outlet mixing.
Certainly the most also can install barrier valve additional at steam condenser 21 or additional adjustable rear final stage feed-water heater side, for every
Absolutely, the system that on-bne repair completely cuts off is facilitated.
In the present embodiment, after the temperature rise of most economical feed temperature deduction steam condenser 21, it it is additional adjustable rear end
Level feed-water heater 01 outlet exports, with steam condenser 03, the feed temperature mixed, and is additional adjustable rear final stage extraction regulation
The result that valve 02 regulates with water side regulation valve 7 mutual association.
By controlling additional adjustable rear final stage extraction control valve 02, can control enter steam condenser 03 and add adjustable
The extraction pressure of final stage feed-water heater 01 after formula；By controlling water side regulation valve 7, can control to distribute into steam condenser 03
With the feedwater flow of additional adjustable rear final stage feed-water heater 01, jointly control the two regulation valve and just can control additional adjustable
After formula, final stage feed-water heater 01 outlet exports, with steam condenser 03, the feed temperature mixed.
Therefore, the control strategy of the present embodiment is:
First, according to situations such as steam generator system configurations, determine this unit most economical feed temperature value under different load, at button
After removing the temperature rise of steam condenser 21, according to turbine high-pressure cylinder structure, the operating load etc. that unit is often residing, determine excellent
Change the additional adjustable rear final stage extraction opening selected, and then determine that different load adds adjustable rear final stage extraction opening sliding pressure operation
Corresponding additional adjustable rear final stage extraction pressure value.So that it is determined that the scalable of additional adjustable rear final stage extraction control valve 02
Pressure limit.
Feed temperature value most economical under different load is subtracted out the temperature value after the temperature rise of steam condenser 21 as attached
Add adjustable rear final stage extraction control valve 02 and water side regulation valve 7 jointly control target.
During two regulation valves jointly control, on the premise of meeting most economical feed temperature value, should by additional can
After mode, the aperture of final stage extraction control valve 02 is as the first adjustment action, i.e. drives big additional adjustable rear final stage extraction control valve
02, to reduce restriction loss of drawing gas, water side regulation valve 7, as the second adjustment action, fitting into Row sum-equal matrix, reaching control until adjusting
Target processed.
Meanwhile, feed temperature value is exported for avoiding final stage feed-water heater 01 to export feed temperature value and steam condenser 03
Have big difference, be unfavorable for the safety of tubing, a maximum difference can be manually set, regulate valve 7 as water side and add
One feedback factor of adjustable rear final stage extraction control valve 02, once exceedes this safe difference, then two regulation valves can join
Close regulation, control this difference in safety range.
Detailed description of the invention 20
Figure 23 is the 20th specific embodiment of the present invention, the present embodiment and the difference of embodiment 19, in system structure layout,
The water side ducts of steam condenser 03 arranges regulation valve 7, is connected in parallel with additional adjustable rear final stage feed-water heater 01,
And be connected in series with conventional final stage feed-water heater 11 together.Feedwater exports from conventional final stage feed-water heater 11, divides two
After road respectively enters steam condenser 03 and additional adjustable rear final stage feed-water heater 01 heats, after two-way feedwater mixing
Enter back in steam condenser 21 and heat.In the present embodiment, the temperature of most economical feed temperature deduction steam condenser 21
After Shenging, it is that additional adjustable rear final stage feed-water heater 01 outlet exports, with steam condenser 03, the feed temperature mixed, is attached
Add the result of adjustable rear final stage extraction control valve 02 and water side regulation valve 7 mutual association regulation.Now, by under different load
Economic feed temperature value is subtracted out the temperature value after the temperature rise of steam condenser 21 as additional adjustable rear final stage extraction regulation
Valve 02 and water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, and here is omitted.
Detailed description of the invention 21
Figure 24 is the 21st specific embodiment of the present invention, the present embodiment and the difference of embodiment 19, and system structure is arranged
On, the water side ducts of additional adjustable rear final stage feed-water heater 01 arranges regulation valve 7, company in parallel with steam condenser 03
Connect, and be connected in series with steam condenser 21 together.Feedwater exports from conventional final stage feed-water heater 11, enters steam cooling
Device 21 heats, then divides two-way to respectively enter steam condenser 03 and additional adjustable rear final stage feed-water heater 01 is carried out
After heating, after two-way feedwater mixing, enter back into boiler economizer.In the present embodiment, most economical feed temperature is additional adjustable
The outlet of rear final stage feed-water heater 01 exports, with steam condenser 03, the feed temperature mixed, and is that additional adjustable rear final stage is drawn gas
The result that regulation valve 02 regulates with water side regulation valve 7 mutual association.Now, using feed temperature value most economical under different load as
Additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7 jointly control target, remaining control mode and embodiment
19 is identical, and here is omitted.
Detailed description of the invention 22
Figure 25 is the 22nd specific embodiment of the present invention, the present embodiment and the difference of embodiment 21, system structure cloth
Put, the water side ducts of steam condenser 03 arranges regulation valve 7, in parallel with additional adjustable rear final stage feed-water heater 01
Connect, and be connected in series with steam condenser 21 together.Feedwater exports from conventional final stage feed-water heater 11, enters steam cold
But device 21 heats, then divide two-way to respectively enter steam condenser 03 and additional adjustable rear final stage feed-water heater 01 enters
After row heating, after two-way feedwater mixing, enter back into boiler economizer.In the present embodiment, most economical feed temperature is additional adjustable
After formula, final stage feed-water heater 01 outlet exports, with steam condenser 03, the feed temperature mixed, and is that additional adjustable rear final stage is taken out
The result that steam control valve 02 regulates with water side regulation valve 7 mutual association.Now, most economical feed temperature value under different load is made
Target is jointly controlled, remaining control mode and enforcement for additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7
Example 19 is identical, and here is omitted.
Detailed description of the invention 23
Figure 26 is the 23rd specific embodiment of the present invention, the present embodiment and the difference of embodiment 21, system structure cloth
Put, the water side ducts of additional adjustable rear final stage feed-water heater 01 arranges regulation valve 7, in parallel with steam condenser 21
Connect, and be connected in series with final stage feed-water heater 11 together.Feedwater exports from conventional final stage feed-water heater 11, point two-way
Respectively enter steam condenser 21 and after additional adjustable rear final stage feed-water heater 01 heats, after two-way feedwater mixing again
Enter in steam condenser 03 and heat.In the present embodiment, the temperature rise of most economical feed temperature deduction steam condenser 03
After temperature value, be the outlet of additional adjustable rear final stage feed-water heater 01 export with steam condenser 21 mix to water temperature
Degree, is the result of additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7 mutual association regulation.Now, by difference
Under load, the temperature value after the temperature rise of most economical feed temperature deduction steam condenser 03 draws gas as additional adjustable rear final stage
Regulation valve 02 and water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, the most superfluous
State.
Detailed description of the invention 24
Figure 27 is the 24th specific embodiment of the present invention, the present embodiment and the difference of embodiment 23, system structure cloth
Put, the water side ducts of steam condenser 21 arranges regulation valve 7, in parallel with additional adjustable rear final stage feed-water heater 01
Connect, and be connected in series with final stage feed-water heater 11 together.Feedwater exports from conventional final stage feed-water heater 11, point two-way
Respectively enter steam condenser 21 and after additional adjustable rear final stage feed-water heater 01 heats, after two-way feedwater mixing again
Enter in steam condenser 03 and heat.In the present embodiment, the temperature rise of most economical feed temperature deduction steam condenser 03
After temperature value, be the outlet of additional adjustable rear final stage feed-water heater 01 export with steam condenser 21 mix to water temperature
Degree, is the result of additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7 mutual association regulation.Now, by difference
Under load, the temperature value after the temperature rise of most economical feed temperature deduction steam condenser 03 draws gas as additional adjustable rear final stage
Regulation valve 02 and water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, the most superfluous
State.
Detailed description of the invention 25
Figure 28 is the 25th specific embodiment of the present invention, the present embodiment and the difference of embodiment 23, system structure cloth
Put, the water side ducts of additional adjustable rear final stage feed-water heater 01 arranges regulation valve 7, in parallel with steam condenser 21
Connect, and be connected in series with steam condenser 03 together.Feedwater exports from conventional final stage feed-water heater 11, enters steam cold
But device 03 heats, then divide two-way to respectively enter steam condenser 21 and additional adjustable rear final stage feed-water heater 01 enters
After row heating, after two-way feedwater mixing, enter back into boiler economizer.In the present embodiment, most economical feed temperature is additional adjustable
After formula, final stage feed-water heater 01 outlet exports, with steam condenser 21, the feed temperature mixed, and is that additional adjustable rear final stage is taken out
The result that steam control valve 02 regulates with water side regulation valve 7 mutual association.Now, most economical feed temperature value under different load is made
Target is jointly controlled, remaining control mode and enforcement for additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7
Example 19 is identical, and here is omitted.
Detailed description of the invention 26
Figure 29 is the 26th specific embodiment of the present invention, the present embodiment and the difference of embodiment 25, system structure cloth
Put, the water side ducts of steam condenser 21 arranges regulation valve 7, in parallel with additional adjustable rear final stage feed-water heater 01
Connect, and be connected in series with steam condenser 03 together.Feedwater exports from conventional final stage feed-water heater 11, enters steam cold
But device 03 heats, then divide two-way to respectively enter steam condenser 21 and additional adjustable rear final stage feed-water heater 01 enters
After row heating, after two-way feedwater mixing, enter back into boiler economizer.In the present embodiment, most economical feed temperature is additional adjustable
After formula, final stage feed-water heater 01 outlet exports, with steam condenser 21, the feed temperature mixed, and is that additional adjustable rear final stage is taken out
The result that steam control valve 02 regulates with water side regulation valve 7 mutual association.Now, most economical feed temperature value under different load is made
Target is jointly controlled, remaining control mode and enforcement for additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7
Example 19 is identical, and here is omitted.
Detailed description of the invention 27
Figure 30 is the 27th specific embodiment of the present invention, the present embodiment and the difference of embodiment 25, system structure cloth
Put, the water side ducts of steam condenser 03 arrange regulation valve 7, is connected in parallel with steam condenser 21, and together with end
Level feed-water heater 11 is connected in series.Feedwater exports from conventional final stage feed-water heater 11, and it is cold that a point two-way respectively enters steam
But, after device 21 and steam condenser 03 heat, after two-way feedwater mixing, additional adjustable rear final stage feed-water heater is entered back into
Heat in 01.In the present embodiment, the temperature of the additional adjustable rear final stage feed-water heater 01 of most economical feed temperature deduction
Temperature value after Shenging, is that steam condenser 03 outlet exports, with steam condenser 21, the feed temperature mixed, is additional adjustable
The result that rear final stage extraction control valve 02 regulates with water side regulation valve 7 mutual association.Now, by feedwater most economical under different load
Temperature value after the temperature rise of the additional adjustable rear final stage feed-water heater 01 of temperature deduction draws gas as additional adjustable rear final stage
Regulation valve 02 and water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, the most superfluous
State.
Detailed description of the invention 28
Figure 31 is the 28th specific embodiment of the present invention, the present embodiment and the difference of embodiment 27, system structure cloth
Put, the water side ducts of steam condenser 21 arrange regulation valve 7, is connected in parallel with steam condenser 03, and together with end
Level feed-water heater 11 is connected in series.Feedwater exports from conventional final stage feed-water heater 11, and it is cold that a point two-way respectively enters steam
But, after device 21 and steam condenser 03 heat, after two-way feedwater mixing, additional adjustable rear final stage feed-water heater is entered back into
Heat in 01.In the present embodiment, the temperature of the additional adjustable rear final stage feed-water heater 01 of most economical feed temperature deduction
Temperature value after Shenging, is that steam condenser 03 outlet exports, with steam condenser 21, the feed temperature mixed, is additional adjustable
The result that rear final stage extraction control valve 02 regulates with water side regulation valve 7 mutual association.Now, by feedwater most economical under different load
Temperature value after the temperature rise of the additional adjustable rear final stage feed-water heater 01 of temperature deduction draws gas as additional adjustable rear final stage
Regulation valve 02 and water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, the most superfluous
State.
Detailed description of the invention 29
Figure 32 is the 29th specific embodiment of the present invention, the present embodiment and the difference of embodiment 27, system structure cloth
Put, the water side ducts of steam condenser 03 arranges regulation valve 7, is connected in parallel with steam condenser 21, and together with attached
Add adjustable rear final stage feed-water heater 01 to be connected in series.Feedwater exports from conventional final stage feed-water heater 11, enters additional
Adjustable rear final stage feed-water heater 01 heats, then divides two-way to respectively enter steam condenser 03 and steam condenser 21
After heating, after two-way feedwater mixing, enter back into boiler economizer.In the present embodiment, most economical feed temperature is that steam is cold
But device 03 outlet exports, with steam condenser 21, the feed temperature mixed, and is additional adjustable rear final stage extraction control valve 02 and water
The result of side regulation valve 7 mutual association regulation.Now, using feed temperature value most economical under different load as additional adjustable after
Final stage extraction control valve 02 and water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, herein
Repeat no more.
Detailed description of the invention 30
Figure 33 is the 30th specific embodiment of the present invention, the present embodiment and the difference of embodiment 29, and system structure is arranged
On, the water side ducts of steam condenser 21 arranges regulation valve 7, is connected in parallel with steam condenser 03, and together with additional
Adjustable rear final stage feed-water heater 01 is connected in series.Feedwater exports from conventional final stage feed-water heater 11, and entrance is additional can
After mode, final stage feed-water heater 01 heats, then divide two-way to respectively enter steam condenser 03 and steam condenser 21 enters
After row heating, after two-way feedwater mixing, enter back into boiler economizer.In the present embodiment, most economical feed temperature is steam cooling
Device 03 outlet exports, with steam condenser 21, the feed temperature mixed, and is additional adjustable rear final stage extraction control valve 02 and water side
The result of regulation valve 7 mutual association regulation.Now, using feed temperature value most economical under different load as additional adjustable rear end
Level extraction control valve 02 and water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, the most not
Repeat again.
Detailed description of the invention 31
Figure 34 is the 31st specific embodiment of the present invention, the present embodiment conventional final stage extraction opening 1, final stage draw gas 10 and
On the basis of final stage feed-water heater 11, the additional adjustable rear final stage extraction opening 0 that is additionally arranged on high pressure cylinder 5, additional adjustable after
Final stage extraction line 00, additional adjustable rear final stage extraction control valve 02, extraction line 00 ', steam condenser 03 and additional can
Final stage feed-water heater 01 after mode.Additional adjustable rear final stage draw gas the most successively through add adjustable after final stage extraction line 00
Enter steam condenser 03 heating feedwater with additional adjustable rear final stage extraction control valve 02, enter through extraction line 00 ' the most again
Enter the heating feedwater of additional adjustable rear final stage feed-water heater 01.
Meanwhile, steam condenser 03 and additional adjustable rear final stage feed-water heater 01 are connected in series, additional adjustable after
Regulation valve 7 is set in the water side ducts of final stage feed-water heater 01, is connected in parallel with steam condenser 21, and together with conventional
Final stage feed-water heater 11 is connected in series.Utilize additional adjustable rear final stage extraction control valve 02 that additional adjustable rear final stage is taken out
Drawing gas of steam pipe road 00 is adjusted, and then controls the pressure after additional adjustable rear final stage extraction control valve 02；Final stage feeds water
Heater 11 outlet feedwater be split into two parts, a part successively through add adjustable after final stage feed-water heater 01 and steam
Cooler 03 heats, and a part heats through steam condenser 21, then both mixing, enters boiler as final feedwater and saves coal
Device.Regulation valve 7 is set in the water side ducts of additional adjustable rear final stage feed-water heater 01, can be used to control and regulation and be diverted into
Enter the feedwater flow of additional adjustable rear final stage feed-water heater 01 and steam condenser 21.Therefore, added by combine regulation
Adjustable rear final stage extraction control valve 02 and regulation valve 7, after controlling steam condenser 03 and steam condenser 21 outlet mixing
The temperature of feedwater.
Certainly the most also can install barrier valve additional at steam condenser 21 or additional adjustable rear final stage feed-water heater side, for every
Absolutely, the system that on-bne repair completely cuts off is facilitated.
In the present embodiment, most economical feed temperature is that steam condenser 21 outlet mixes with steam condenser 03 outlet
Feed temperature, is the result of additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7 mutual association regulation.
By controlling additional adjustable rear final stage extraction control valve 02, can control enter steam condenser 03 and add adjustable
The extraction pressure of final stage feed-water heater 01 after formula；By controlling water side regulation valve 7, can control to distribute into steam condenser 21
With the feedwater flow of additional adjustable rear final stage feed-water heater 01, jointly control the two regulation valve and just can control steam cooling
Device 21 exports, with steam condenser 03, the feed temperature mixed.
Therefore, the control strategy of the present embodiment is:
First, according to situations such as steam generator system configurations, determine this unit most economical feed temperature value under different load, according to
Turbine high-pressure cylinder structure, the operating load etc. that unit is often residing, determine that the additional adjustable rear final stage of optimized choice is drawn gas
Mouthful, and then determine that different load adds additional adjustable rear final stage corresponding to adjustable rear final stage extraction opening sliding pressure operation and draws gas pressure
Force value.So that it is determined that the scalable pressure limit of additional adjustable rear final stage extraction control valve 02.
Feed temperature value most economical under different load is adjusted as additional adjustable rear final stage extraction control valve 02 and water side
That saves valve 7 jointly controls target.
During two regulation valves jointly control, on the premise of meeting most economical feed temperature value, should by additional can
After mode, the aperture of final stage extraction control valve 02 is as the first adjustment action, i.e. drives big additional adjustable rear final stage extraction control valve
02, to reduce restriction loss of drawing gas, water side regulation valve 7, as the second adjustment action, fitting into Row sum-equal matrix, reaching control until adjusting
Target processed.
Meanwhile, export feed temperature value with steam condenser 21 and differ for avoiding steam condenser 03 to export feed temperature value
Excessive, it is unfavorable for the safety of tubing, a maximum difference can be manually set, regulate valve 7 as water side and add adjustable
A feedback factor of final stage extraction control valve 02 after formula, once exceedes this safe difference, then two regulation valves can combine tune
Joint, controls this difference in safety range.
Detailed description of the invention 32
Figure 35 is the 32nd specific embodiment of the present invention, the present embodiment and the difference of embodiment 31, system structure cloth
Putting, steam condenser 03 and additional adjustable rear final stage feed-water heater 01 are connected in series, in the water side of steam condenser 21
Regulation valve 7 is set on pipeline, is connected in parallel with steam condenser 03 and additional adjustable rear final stage feed-water heater 01.Final stage is given
The feedwater of water heater 11 outlet is split into two parts, a part successively through additional adjustable after final stage feed-water heater 01 and steaming
Vapour cooler 03 heats, and a part heats through steam condenser 21, then both mixing, enters boiler as final feedwater and saves
Coal device.In the present embodiment, most economical feed temperature be steam condenser 03 outlet with steam condenser 21 export mix to
Coolant-temperature gage, is the result of additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7 mutual association regulation.Now, will
Under different load, most economical feed temperature value is as additional adjustable rear final stage extraction control valve 02 and the associating of water side regulation valve 7
Controlling target, remaining control mode is identical with embodiment 19, and here is omitted.
Detailed description of the invention 33
Figure 36 is the 33rd specific embodiment of the present invention, the present embodiment and the difference of embodiment 31, system structure cloth
Putting, additional adjustable rear final stage feed-water heater 01 and steam condenser 03 are connected in series, in the water side of steam condenser 03
Regulation valve 7 is set on pipeline, is connected in parallel with steam condenser 03 and additional adjustable rear final stage feed-water heater 01.Final stage is given
The feedwater of water heater 11 outlet is split into two parts, a part successively through steam condenser 03 and additional adjustable after final stage give
Water heater 01 heats, and a part heats through steam condenser 21, then both mixing, enters boiler as final feedwater and saves
Coal device.In the present embodiment, most economical feed temperature is that additional adjustable rear final stage feed-water heater 01 outlet cools down with steam
The feed temperature of device 21 outlet mixing, is that additional adjustable rear final stage extraction control valve 02 is adjusted with water side regulation valve 7 mutual association
The result of joint.Now, using feed temperature value most economical under different load as additional adjustable rear final stage extraction control valve 02 and
Water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, and here is omitted.
Detailed description of the invention 34
Figure 37 is the 34th specific embodiment of the present invention, the present embodiment and the difference of embodiment 33, system structure cloth
Putting, additional adjustable rear final stage feed-water heater 01 and steam condenser 03 are connected in series, in the water side of steam condenser 21
Regulation valve 7 is set on pipeline, is connected in parallel with additional adjustable rear final stage feed-water heater 01 and steam condenser 03.Final stage is given
The feedwater of water heater 11 outlet is split into two parts, a part successively through steam condenser 03 and additional adjustable after final stage give
Water heater 01 heats, and a part heats through steam condenser 21, then both mixing, enters boiler as final feedwater and saves
Coal device.In the present embodiment, most economical feed temperature is that additional adjustable rear final stage feed-water heater 01 outlet cools down with steam
The feed temperature of device 21 outlet mixing, is that additional adjustable rear final stage extraction control valve 02 is adjusted with water side regulation valve 7 mutual association
The result of joint.Now, using feed temperature value most economical under different load as additional adjustable rear final stage extraction control valve 02 and
Water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, and here is omitted.
Detailed description of the invention 35
Figure 38 is the 35th specific embodiment of the present invention, the present embodiment and the difference of embodiment 33, system structure cloth
Putting, steam condenser 03 and steam condenser 21 are connected in series, in the water side of additional adjustable rear final stage feed-water heater 01
Regulation valve 7 is set on pipeline, is connected in parallel with steam condenser 03 and steam condenser 21.Final stage feed-water heater 11 outlet
Feedwater is split into two parts, and a part heats through steam condenser 21 and steam condenser 03 successively, and a part is through additional adjustable
After formula, final stage feed-water heater 01 heats, and then both mixing, enter boiler economizer as final feedwater.At the present embodiment
In, most economical feed temperature be the outlet of additional adjustable rear final stage feed-water heater 01 export with steam condenser 03 mix to
Coolant-temperature gage, is the result of additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7 mutual association regulation.Now, will
Under different load, most economical feed temperature value is as additional adjustable rear final stage extraction control valve 02 and the associating of water side regulation valve 7
Controlling target, remaining control mode is identical with embodiment 19, and here is omitted.
Detailed description of the invention 36
Figure 39 is the 36th specific embodiment of the present invention, the present embodiment and the difference of embodiment 35, system structure cloth
Putting, steam condenser 21 and steam condenser 03 are connected in series, in the water side of additional adjustable rear final stage feed-water heater 01
Regulation valve 7 is set on pipeline, is connected in parallel with steam condenser 21 and steam condenser 03.Final stage feed-water heater 11 outlet
Feedwater is split into two parts, and a part heats through steam condenser 03 and steam condenser 21 successively, and a part is through additional adjustable
After formula, final stage feed-water heater 01 heats, and then both mixing, enter boiler economizer as final feedwater.At the present embodiment
In, most economical feed temperature be the outlet of additional adjustable rear final stage feed-water heater 01 export with steam condenser 21 mix to
Coolant-temperature gage, is the result of additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7 mutual association regulation.Now, will
Under different load, most economical feed temperature value is as additional adjustable rear final stage extraction control valve 02 and the associating of water side regulation valve 7
Controlling target, remaining control mode is identical with embodiment 19, and here is omitted.
Detailed description of the invention 37
Figure 40 is the 37th specific embodiment of the present invention, the present embodiment and the difference of embodiment 35, system structure cloth
Putting, steam condenser 03 and steam condenser 21 are connected in series, and arrange regulation valve in the water side ducts of steam condenser 21
7, it is connected in parallel with additional adjustable rear final stage feed-water heater 01.The feedwater of final stage feed-water heater 11 outlet is split into two
Point, a part heats through steam condenser 21 and steam condenser 03 successively, a part through additional adjustable after final stage feed water and add
Hot device 01 heats, and then both mixing, enter boiler economizer as final feedwater.In the present embodiment, most economical feedwater
Temperature is that additional adjustable rear final stage feed-water heater 01 outlet exports, with steam condenser 03, the feed temperature mixed, and is additional
The result that adjustable rear final stage extraction control valve 02 regulates with water side regulation valve 7 mutual association.Now, by warp under different load
Ji feed temperature value jointly controls target as additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7, remaining
Control mode is identical with embodiment 19, and here is omitted.
Detailed description of the invention 38
Figure 41 is the 38th specific embodiment of the present invention, the present embodiment and the difference of embodiment 37, system structure cloth
Putting, steam condenser 21 and steam condenser 03 are connected in series, and arrange regulation valve in the water side ducts of steam condenser 03
7, it is connected in parallel with additional adjustable rear final stage feed-water heater 01.The feedwater of final stage feed-water heater 11 outlet is split into two
Point, a part heats through steam condenser 03 and steam condenser 21 successively, a part through additional adjustable after final stage feed water and add
Hot device 01 heats, and then both mixing, enter boiler economizer as final feedwater.In the present embodiment, most economical feedwater
Temperature is that additional adjustable rear final stage feed-water heater 01 outlet exports, with steam condenser 21, the feed temperature mixed, and is additional
The result that adjustable rear final stage extraction control valve 02 regulates with water side regulation valve 7 mutual association.Now, by warp under different load
Ji feed temperature value jointly controls target as additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7, remaining
Control mode is identical with embodiment 19, and here is omitted.
Detailed description of the invention 39
Figure 42 is the 39th specific embodiment of the present invention, the present embodiment and the difference of embodiment 37, system structure cloth
Putting, additional adjustable rear final stage feed-water heater 01 and steam condenser 21 are connected in series, in the water side of steam condenser 03
Regulation valve 7 is set on pipeline, is connected in parallel with additional adjustable rear final stage feed-water heater 01 and steam condenser 21.Final stage is given
The feedwater of water heater 11 outlet is split into two parts, and a part heats through steam condenser 03, and a part is cold through steam successively
But device 21 and additional adjustable rear final stage feed-water heater 01 heat, and then both mixing, enter boiler as final feedwater
Economizer.In the present embodiment, most economical feed temperature is that additional adjustable rear final stage feed-water heater 01 outlet is cold with steam
But the feed temperature of device 03 outlet mixing, is that additional adjustable rear final stage extraction control valve 02 regulates valve 7 mutual association with water side
The result of regulation.Now, using feed temperature value most economical under different load as additional adjustable rear final stage extraction control valve 02
And water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, and here is omitted.
Detailed description of the invention 40
Figure 43 is the 40th specific embodiment of the present invention, the present embodiment and the difference of embodiment 39, and system structure is arranged
On, additional adjustable rear final stage feed-water heater 01 and steam condenser 21 are connected in series, at the water side pipe of steam condenser 03
Regulation valve 7 is set on road, is connected in parallel with additional adjustable rear final stage feed-water heater 01 and steam condenser 21.Final stage feeds water
The feedwater of heater 11 outlet is split into two parts, and a part heats through steam condenser 03, and a part is successively through additional adjustable
After formula, final stage feed-water heater 01 and steam condenser 21 heat, then both mixing, enter boiler as final feedwater and save
Coal device.In the present embodiment, most economical feed temperature be steam condenser 21 outlet with steam condenser 03 export mix to
Coolant-temperature gage, is the result of additional adjustable rear final stage extraction control valve 02 and water side regulation valve 7 mutual association regulation.Now, will
Under different load, most economical feed temperature value is as additional adjustable rear final stage extraction control valve 02 and the associating of water side regulation valve 7
Controlling target, remaining control mode is identical with embodiment 19, and here is omitted.
Detailed description of the invention 41
Figure 44 is the 41st specific embodiment of the present invention, the present embodiment and the difference of embodiment 39, system structure cloth
Putting, additional adjustable rear final stage feed-water heater 01 and steam condenser 21 are connected in series, in the water side of steam condenser 21
Arranging on pipeline and regulate valve 7, steam condenser 03 and additional adjustable rear final stage feed-water heater 01 and steam condenser 21 are also
Connection connects.The feedwater of final stage feed-water heater 11 outlet is split into two parts, and a part heats through steam condenser 03, a part
Successively through steam condenser 21 and additional adjustable after final stage feed-water heater 01 heat, then both mixing, as final
Feedwater enters boiler economizer.In the present embodiment, most economical feed temperature is additional adjustable rear final stage feed-water heater 01
Export and export, with steam condenser 03, the feed temperature mixed, be that additional adjustable rear final stage extraction control valve 02 regulates with water side
The result of valve 7 mutual association regulation.Now, feed temperature value most economical under different load is taken out as additional adjustable rear final stage
Steam control valve 02 and water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, the most superfluous
State.
Detailed description of the invention 42
Figure 45 is the 42nd specific embodiment of the present invention, the present embodiment and the difference of embodiment 41, system structure cloth
Putting, steam condenser 21 and additional adjustable rear final stage feed-water heater 01 are connected in series, and give in additional adjustable rear final stage
Regulation valve 7, steam condenser 03 and steam condenser 21 and additional adjustable rear end are set in the water side ducts of water heater 01
Level feed-water heater 01 is connected in parallel.The feedwater of final stage feed-water heater 11 outlet is split into two parts, and a part is cold through steam
But device 03 heats, a part successively through additional adjustable after final stage feed-water heater 01 and steam condenser 21 heat, then two
Person mixes, and enters boiler economizer as final feedwater.In the present embodiment, most economical feed temperature is steam condenser 21
Export and export, with steam condenser 03, the feed temperature mixed, be that additional adjustable rear final stage extraction control valve 02 regulates with water side
The result of valve 7 mutual association regulation.Now, feed temperature value most economical under different load is taken out as additional adjustable rear final stage
Steam control valve 02 and water side regulation valve 7 jointly control target, remaining control mode is identical with embodiment 19, the most superfluous
State.
The preferred embodiment of the present invention described in detail above.It should be noted that, the adjustable feedwater backheat system of the present invention
Whether system, configure steam condenser according to water side, if configuration water side regulation valve, the steam condenser of varying number, different numbers
The water side regulation valve of amount, and can have many with the connected mode of additional adjustable rear final stage feed-water heater (connecting and in parallel) etc.
Plant combining form.
Should be appreciated that those of ordinary skill in the art just can make according to the design of the present invention without creative work
Many modifications and variations.Therefore, all technical staff in the art are led to the most on the basis of existing technology
Cross the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be the guarantor being defined in the patent claims
In the range of protecting.
Claims (13)
1., for the adjustable feed water heat regenerative in thermal power plant, at least include the high pressure cylinder of steam turbine, at high pressure cylinder
On routine non-dimmable formula final stage extraction opening and conventional non-dimmable formula final stage feed-water heater, it is characterised in that be additionally included in
Additional adjustable rear final stage extraction opening on described high pressure cylinder, the extraction pressure of described additional adjustable rear final stage extraction opening is higher than
1.2 times of the non-dimmable formula final stage extraction pressure that described high pressure cylinder is conventional, less than the non-dimmable formula final stage that described high pressure cylinder is conventional
2.5 times of extraction pressure；
Draw gas the additional adjustable rear final stage feed-water heater as thermal source with the additional adjustable rear final stage of described high pressure cylinder；
Additional adjustable rear final stage extraction line, described additional adjustable rear final stage extraction line and described additional adjustable rear end
Level extraction opening and described additional adjustable rear final stage feed-water heater are connected；
It is arranged on the extraction control valve on described additional adjustable rear final stage extraction line, for described additional adjustable rear end
Drawing gas in level extraction line is adjusted, described additional adjustable to control to control the outlet pressure of described extraction control valve
The outlet temperature of rear final stage feed-water heater, meets final feed temperature required under different operating mode.
2. adjustable feed water heat regenerative as claimed in claim 1, it is characterised in that also include that at least one steam cools down
Device, wherein, the water side of at least one described steam condenser is entered with the described water side adding adjustable rear final stage feed-water heater
Mouth or outlet are connected in series.
3. adjustable feed water heat regenerative as claimed in claim 1, it is characterised in that also include that at least one steam cools down
Device, wherein, the water side of at least one described steam condenser adds the water side of adjustable rear final stage feed-water heater also with described
Connection connects.
4. adjustable feed water heat regenerative as claimed in claim 2, it is characterised in that also include that at least one water side regulates
Valve, wherein, regulation valve at least one described water side is connected in parallel with described additional adjustable rear final stage feed-water heater, and together
It is connected in series with steam condenser at least one described.
5. adjustable feed water heat regenerative as claimed in claim 2, it is characterised in that also include that at least one water side regulates
Valve, wherein, regulation valve at least one described water side is connected in series with described additional adjustable rear final stage feed-water heater, and together
It is connected in parallel with steam condenser at least one described.
6. adjustable feed water heat regenerative as claimed in claim 2, it is characterised in that also include that at least one water side regulates
Valve, wherein, at least one described water side regulation valve is connected in series with steam condenser at least one described, and together with add can
After mode, final stage feed-water heater is connected in parallel.
7. a control method for the adjustable feed water heat regenerative as described in claim 1 or 2 or 3, including step a: according to
The configuration of steam generator system, sets the most economical feed temperature value under different load, and according to the configuration of feedwater side system by difference
Most economical feed temperature value conversion under load corresponds to additional adjustable rear final stage extraction pressure value.
8. control method as claimed in claim 7, including step b: select the most additional adjustable rear final stage extraction opening, obtain
Obtain the additional adjustable rear final stage extraction pressure value under sliding pressure operation different load.
9. control method as claimed in claim 8, including step c: additional adjustable under comparison step a and b different load
Rear final stage extraction pressure value, under equal load, if the additional adjustable rear final stage extraction pressure value of step a is more than the attached of step b
Add adjustable rear final stage extraction pressure value, then feed back to the additional adjustable rear final stage extraction pressure value of step b additional adjustable
Extraction control valve on final stage extraction steam pipe after formula, the target controlled as it；Under equal load, if step a is additional adjustable
Rear final stage extraction pressure value less than the additional adjustable rear final stage extraction pressure value of step b, then with step a additional adjustable after
Final stage extraction pressure value feeds back to the extraction control valve on additional adjustable rear final stage extraction steam pipe, the target controlled as it；With
Deng under load, if the additional adjustable rear final stage extraction pressure value of step a is drawn gas pressure equal to the additional adjustable rear final stage of step b
Force value, then feed back to additional adjustable rear final stage extraction steam pipe with the additional adjustable rear final stage extraction pressure value of step a or step b
On extraction control valve, the target controlled as it.
10. a control method for the adjustable feed water heat regenerative as described in claim 4 or 5 or 6, including step a ': root
According to the configuration of steam generator system, set the most economical feed temperature value under different load.
11. control methods as claimed in claim 10, including step b ': secondly according to the configuration of feedwater side system, select to close
The additional adjustable rear final stage extraction opening of reason, it is thus achieved that the additional adjustable rear final stage extraction pressure under sliding pressure operation different load
Value, so that it is determined that the scalable pressure limit of additional adjustable rear final stage extraction control valve.
12. control methods as claimed in claim 11, including step c ': using feed temperature value most economical under different load as
Additional adjustable rear final stage extraction control valve and water side regulation valve jointly control target, two regulation valves jointly control process
In, on the premise of meeting most economical feed temperature value, using the aperture of additional adjustable rear final stage extraction control valve as the
One adjustment action, drives big additional adjustable rear final stage extraction control valve, and to reduce restriction loss of drawing gas, regulation valve in water side is as the
Two adjustment actions, fit into Row sum-equal matrix, reach to control target until adjusting.
13. control methods as claimed in claim 12, it is preferred that step c ' set an additional adjustable rear final stage feedwater and add
The maximum difference of hot device outlet feed temperature value and steam condenser outlet feed temperature, and as water side regulation valve and attached
Add a feedback command of adjustable rear final stage extraction control valve combine regulation, once exceed this safe difference, then two tune
Joint valve combine regulation, controls this difference in safety range.
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| CN201610611250.8A CN106051737B (en) | 2016-07-30 | 2016-07-30 | Adjustable feedwater backheating system and control method |
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| CN201610611250.8A CN106051737B (en) | 2016-07-30 | 2016-07-30 | Adjustable feedwater backheating system and control method |
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| CN107388229A (en) * | 2017-08-31 | 2017-11-24 | 冯煜珵 | A kind of adjustable joint backheating system |
| CN107388230A (en) * | 2017-08-31 | 2017-11-24 | 冯煜珵 | A kind of joint backheating system |
| CN107388231A (en) * | 2017-08-31 | 2017-11-24 | 冯煜珵 | A kind of heat regenerative system |
| CN114413251A (en) * | 2021-12-09 | 2022-04-29 | 广西电网有限责任公司电力科学研究院 | System for adjusting main steam temperature of Pi type hedging once-through boiler |
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| CN107388229A (en) * | 2017-08-31 | 2017-11-24 | 冯煜珵 | A kind of adjustable joint backheating system |
| CN107388230A (en) * | 2017-08-31 | 2017-11-24 | 冯煜珵 | A kind of joint backheating system |
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| WO2019042020A1 (en) * | 2017-08-31 | 2019-03-07 | 冯煜珵 | Heat recovery device |
| WO2019042019A1 (en) * | 2017-08-31 | 2019-03-07 | 冯煜珵 | Combined regeneration device |
| WO2019042021A1 (en) * | 2017-08-31 | 2019-03-07 | 冯煜珵 | Adjustable combined regeneration device |
| US11092040B2 (en) | 2017-08-31 | 2021-08-17 | Yucheng FENG | Combined heat recovery device |
| CN114413251A (en) * | 2021-12-09 | 2022-04-29 | 广西电网有限责任公司电力科学研究院 | System for adjusting main steam temperature of Pi type hedging once-through boiler |
| CN114413251B (en) * | 2021-12-09 | 2023-10-27 | 广西电网有限责任公司电力科学研究院 | System for adjusting main steam temperature of Pi-type opposite-flow direct-current boiler |
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