CN1132329A - Parallel operation type combined cycle power station - Google Patents
Parallel operation type combined cycle power station Download PDFInfo
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- CN1132329A CN1132329A CN 95110984 CN95110984A CN1132329A CN 1132329 A CN1132329 A CN 1132329A CN 95110984 CN95110984 CN 95110984 CN 95110984 A CN95110984 A CN 95110984A CN 1132329 A CN1132329 A CN 1132329A
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- hrsg
- steam
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- outlet
- working medium
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- 239000004509 smoke generator Substances 0.000 claims abstract description 13
- 239000000446 fuel Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 27
- 239000003546 flue gas Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 18
- 239000006200 vaporizer Substances 0.000 claims description 18
- 230000008676 import Effects 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 235000019504 cigarettes Nutrition 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 239000003517 fume Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims 1
- 235000011613 Pinus brutia Nutrition 0.000 claims 1
- 241000018646 Pinus brutia Species 0.000 claims 1
- 206010037660 Pyrexia Diseases 0.000 claims 1
- 239000012808 vapor phase Substances 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 239000002918 waste heat Substances 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 6
- 235000014171 carbonated beverage Nutrition 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000010248 power generation Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000028161 membrane depolarization Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Abstract
The invention relates to a combined cycle power station, namely a parallel operation type combined cycle power station, which forms a new power station system by a smoke generator, a steam turbine, a waste heat boiler, a conventional boiler and the like, wherein the system can adjust the optimal oxygen/fuel ratio of the conventional boiler and the optimal efficiency and economy of the power station system to be consistent, so that the efficiency and the operation economy of the power station can reach the best, and the efficiency can exceed the efficiency of the existing steam multi-pressure type combined cycle power station.
Description
What the present invention relates to is a kind of combined-cycle power generation plant.
Current, the steam multiple pressure formula circulating power station of no afterburning has become most widely used general, most effective circulating power station, but owing to be subjected to the restriction of smoke generator GT (as: gas turbine) delivery temperature, make the steam turbine in the combined cycle system be difficult to select for use modern high parameter, high efficiency type, thereby hindered the further raising of circulating power station efficient.The way ground of existing raising steam turbine parameter is with exhaust afterburning in boiler of GT, but the afterburning amount need satisfy the requirement of oxygen content in the GT exhaust, and departed from the requirement of system's optimum efficiency greatly, in general efficient does not also reach the level of no afterburning circulating power station, therefore seldom uses.
In the circulating power station of routine, smoke generator GT discharges from relief opening, and goes into boiler inlet by pipeline after sucking air acting generating from suction port.For the circulating power station of no afterburning, then flue gas heating working medium in exhaust heat boiler HRSG is discharged from the outlet of cigarette then, and working medium then is heated to form steam, generates electricity with driving steam turbine.Circulating power station for afterburning shape, the flue gas that GT discharges (depolarization small leak or non-the outer of heating working medium that be used for) is all sent the burner hearth of conventional boiler NB to and is participated in burning, consequent flame and high-temperature flue gas are used for heating working medium, the steam driven steam turbine power generation of output.Though the steam parameter of the comparable HRSG output of this strand steam is higher, the fuel quantity among the NB and the air displacement of GT are when having satisfied best oxygen/combustion ratio, and fuel quantity is often much larger than the afterburning value of combined cycle system optimum efficiency.
Purpose of the present invention is exactly for addressing the above problem, and proposes a kind of new shape system, makes best oxygen/combustion than reaching unanimity with the required fuel quantity of system optimum efficiency, and can make electric power station system of the present invention higher than in the past combined cycle efficiency, and Economy is better.
Technical solution of the present invention:
A kind of parallel operation integrally-circulating power station, the subsidiary engine FT that it includes smoke generator GT, steam turbine ST, is made up of condenser (1), oxygen-eliminating device (2), bleeder heater (3) and feed water pump (4), it is characterized in that having a conventional boiler NB at least (using the boiler of conventional fuel), simultaneously, have at least one to hold the boiler flue that carries out heat exchange without the GT exhaust and the working medium of afterburning, the rare part that is vented to of GT just enters the flue heating working medium without afterburning.Simultaneously, other has one air-flow to burn with fuel mix in the burner hearth of conventional boiler NB, flame that produces and flue gas be heating working medium also, working medium runner in these two strands of air-flows will be used pipeline connection, make from oxygen-eliminating device (2) water outlet and flow out, in NB, carry out through the part production of steam process of the working medium of the GT exhaust heating of afterburning not.
The present invention will be not the exhaust of the smoke generator of afterburning to the heating process of working medium, organically be connected as a single entity with heating process in conventional boiler to working medium, can make the efficient of whole electric power station system surpass existing afterburning and no compensation combustion type circulating power station.
The flue gas system that Fig. 1 represents is that a part is advanced HRSG with the exhaust separated into two parts of a GT, and another part advances the burning of NB burner hearth.
The flue gas system that Fig. 2 represents is when GT is two, one exhaust wherein can be fed HRSG, and another then advances burner hearth burning of NB.
The system that Fig. 3 represents sends the exhaust of GT into HRSG, burns and air fed among the NB.
What Fig. 4 represented is that a part is advanced the flue of NB with the exhaust separated into two parts of GT, and another part advances the burner hearth burning of NB, and then smoke inlet flue, the flue gas system form of converging with last one flue gas.
What Fig. 5 represented is the flue of the exhaust of GT being sent to NB, in addition one road air is introduced the burner hearth burning of NB, and then smoke inlet flue, the flue gas system form of converging with last one flue gas.
In the flue gas system that Fig. 1 represents, the GT suction port sucks air from atmosphere, and in GT internal combustion acting generating, the flue gas of generation is discharged from the GT outlet.The outlet of GT is connected to the import of HRSG with pipeline, from the flue of HRSG (on also can the pipeline before HRSG,) take over the road through blower fan (15) and modulating valve (14) intake grill to the NB burner hearth, make the exhaust of GT be divided into two-way, one road outlet discharge from HRSG, burning in NB in another road, and discharges from outlet by the flue of NB.
The flue gas system that Fig. 2 represents has two smoke generator GT
1And GT
2, their suction port sucks air from atmosphere, and portion's work by combustion generating within it, and the flue gas of generation is discharged from their outlet.GT
1Outlet be connected to the import of HRSG, GT with pipeline
2Outlet be connected to the intake grill of NB burner hearth, GT with pipeline
1Exhaust discharge GT through the HRSG flue
2Exhaust in NB afterburning after the NB flue discharge.If the smoke generator more than two, the relief opening that then can select wherein one or several links to each other with separately HRSG with pipeline, and remaining relief opening usefulness pipeline is connected with the burner hearth of separately NB.
Fig. 1, in the system that Fig. 2 and Fig. 3 represent, the runner and the connecting means of working medium (water or steam) are all identical, the part production of steam process of the working medium that heats from oxygen-eliminating device (2) water outlet flows into HRSG is changed over to and in NB, carry out, concrete example is described below: Fig. 1, among Fig. 2 and Fig. 3, the steam (vapor) outlet of exhaust heat boiler HRSG can be connected with the superheater import of conventional boiler NB, the superheater outlet of NB is connected with the steam inlet of steam turbine ST, the feasible production process of supplying with the steam of a ST part changes the NB heating again over to through HRSG and just finishes, the vaporizer of NB (6) is imported and exported and is connected with steam inlet with the water outlet of drum (5), the outlet of the economizer of NB (7) the also water intake of drum (5) connects, the superheater of NB (8) is made up of its leading portion and back segment, its leading portion import is connected with the steam ouput of drum (5), its leading portion outlet all is connected with superheater (8) the back segment import of NB with the outlet of the superheater (9) of HRSG, its back segment outlet is connected with the steam inlet of steam turbine ST, the import of the economizer of NB (7) is connected with the water outlet of each oxygen-eliminating device (2) with subsidiary engine FT, its working principle is as follows, the intake pipe of exhaust heat boiler HRSG connects feed water preheater (11) import of HRSG, heat temperature raising in feed water preheater (11), its outlet connects the water intake of drum (5), the water outlet of drum (5) connects the water intake of the vaporizer (10) of HRSG, water is vaporized in vaporizer (10), the steam ouput of vaporizer (10) connects drum (5) steam inlet, in drum (5), separate carbonated drink, the steam ouput of drum (5) connects the steam inlet of the superheater (9) of HRSG, steam in the superheater (9) is heated to form superheated vapor, the steam ouput of superheater (9) connects the import of the superheater (8) of conventional boiler NB, utilize flame and the high-temperature flue gas more much higher in the conventional boiler to heat the steam that the superheater (9) from HRSG comes out, make by the steam of NB heating higher than the steam parameter that only heats with HRSG than exhaust-heat boiler flue gas temperature.The outlet of the superheater of NB (8) connects the steam inlet of ST, because the steam of its outlet is than the steam parameter height of HRSG superheater (9) outlet, so the efficient of ST is higher during also just than independent operating.The intake pipe of NB connects the water intake of NB economizer (7), water is heat temperature raising in economizer (7), the water outlet of economizer (7) connects the water intake of drum (5), drum (5) has water outlet to connect the water intake of NB evaporation (6), water is vaporized into steam in vaporizer (6), the steam ouput of vaporizer (6) connects the steam inlet of drum (5), in drum (5), separate carbonated drink, the steam ouput of drum (5) connects superheater (8) import of NB, steam is overheated and with the steam that flows into the heating of NB superheater (8) back segment from the superheater (9) of HRSG through superheater (8) leading portion, deliver to the steam inlet of ST from the outlet of NB superheater (8), drive ST.The steam of ST outlet is after condensation, pressurization, heating and the deoxygenation of its subsidiary engine FT, be divided into two-way, one the tunnel delivers to the water intake of the feed water preheater (11) of HRSG through valve (13), and the water intake of the economizer (7) of NB is delivered on another road, from but constitute parallel operation integrally-circulating power station.
The steam flow channel of exhaust heat boiler HRSG of the present invention and conventional boiler NB also can be realized by following structure, after exhaust heat boiler HRSG has cancelled superheater (9), then vaporizer (10) outlet with HRSG is connected with superheater (8) import of conventional boiler NB by drum (5), and superheater (8) outlet is connected with the steam inlet of steam turbine ST.The steam of the vaporizer of HRSG (10) generation is with the steam of NB vaporizer (6) generation like this, in drum (5), separate carbonated drink, the steam of separating causes the import of the superheater (8) of NB by the steam ouput of drum (5), at last from the outlet of superheater (8) for ST work.
Among the present invention, exhaust heat boiler HRSG and conventional boiler NB also can connect as one by part working medium runner, can draw one from the feed water preheater (11) of HRSG in addition enters the mouth for water out to be connected with the vaporizer (6) of NB, the superheater (8) of the outlet of the superheater (9) of HRSG and NB outlet at this moment is with being connected with the steam inlet of steam turbine ST, and a part of steam of wherein supplying with ST changes the NB heating again over to through HRSG.The feed water preheater of HRSG (11) outlet is drawn one the tunnel in addition by drum (5) and is entered the mouth with the vaporizer (6) of NB and to be connected, also the outlet of the vaporizer (10) of HRSG can be drawn one the tunnel in addition by drum (5) is connected with the import of NB superheater (8), the outlet of the superheater (9) of HRSG simultaneously also together is connected with the steam inlet of ST with the outlet of the superheater (8) of NB, and the import and export of the economizer of NB (7) are connected with the water intake of oxygen-eliminating device (2) water outlet and drum (5) among the subsidiary engine FT respectively.Than steam turbine ST initial temperature height, but flue gas is more suitable under high temperature section heat condition of limited at the temperature of exhaust fume of smoke generator GT in this power station.Though this is because higher flue-gas temperature can be the water vapor of part level, and be superheated to the suction parameter requirement of steam turbine ST, but still have the part feedwater because the high temperature section heat of flue gas is limited, and can't reach the requirement that directly enters steam turbine ST, so the part feedwater that utilizes drum (5) that HRSG feed water preheater (11) is provided changes in the vaporizer (6) of NB and vaporizes, the steam of vaporizer (6) vaporization is delivered to Turbo-generator Set ST by NB superheater (8) after overheated again.It is overheated perhaps also the part steam of vaporizer (10) output of HRSG can be changed over to by drum (5) in the superheater (8) of NB, finishes the superheating process behind the remaining part feed-water flashing.
The system of Fig. 1, Fig. 2 and Fig. 3 is undertaken by the part production of steam process of working medium among the HRSG is changed among the NB, reaches the purpose of " the part production of steam process through the working medium of the GT exhaust heating of afterburning is not carried out in NB ".
For the parallel operation integrally-circulating power station that is provided with reheating steam system, the steam that also steam turbine can be connected in the reheaing steam pipe of HRSG and NB is redistributed, make HRSG into than independent operating the time lack, and the corresponding increase of advancing NB changes part production of steam process among the HRSG over to carry out among the NB purpose thereby reach.
In the flue gas system that Fig. 4 represents, the suction port of GT sucks air from atmosphere, and in GT internal combustion acting generating, the flue gas of generation is discharged from the outlet of GT.The outlet conduit of GT is divided into two-way, leads up to blower fan (15) and modulating valve (14) to the intake grill of NB burner hearth, and another road is connected with the flue of NB.The flue gas that GT discharges, a part advance the burning of NB burner hearth, flow into flue then, after the then direct smoke inlet flue of another part and preceding one flue gas converge, flow out from the outlet of boiler flue.Fig. 5 is on the basis of Fig. 4, will go the Na Yichu of NB burner hearth intake grill to save in the GT outlet conduit, and other increases by one and starts from atmosphere, and through blower fan (15) and modulating valve (14) pipeline to NB burner hearth intake grill, other piping installation is constant.
The working medium runner of Fig. 4 and Fig. 5 shows, the water outlet of oxygen-eliminating device (2) is through the import of feed water pump (4) to the economizer (7) of NB, working medium is by economizer (7), vaporizer (6), drum (5) and superheater (8), become superheated vapor, and flow out from the outlet of (8), (8) outlet is connected with the import of S thing, and superheated vapor enters ST acting generating, flows out into FT from the outlet of ST again.The process that working medium experiences in FT is identical with the relevant description of Fig. 1 and Fig. 2.If (ST is the reheat type unit, and then NB also need be equipped with reheater, and it imports and exports respectively the corresponding connection of hot again vapour exit port with ST.) in the system of Fig. 4 and Fig. 5, flow into the working medium of NB from oxygen-eliminating device (2) water outlet, mixed the back flue gas heating, so by the production of steam process of the working medium of the GT exhaust heating of afterburning not, must in NB, carry out, can obtain the steam and the high efficiency electric power station system of high parameter like this.
In a word, circulating power station is designed by method of the present invention,, can obtain than the higher electric power station system of existing circulating power station efficient through after the suitable optimization.
Claims (10)
1, a kind of parallel operation integrally-circulating power station, the subsidiary engine FT that it includes smoke generator GT, steam turbine ST and is made up of condenser (1), oxygen-eliminating device (2), bleeder heater (3) and feed water pump (4), it is characterized in that having a conventional boiler NB at least (using the boiler of conventional fuel), simultaneously, have at least one to hold the boiler flue that carries out heat exchange without the GT exhaust and the working medium of afterburning, the rare part that is vented to of GT just enters the flue heating working medium without afterburning.Simultaneously, other has one air-flow to burn with fuel mix in the burner hearth of conventional boiler NB, flame that produces and flue gas be heating working medium also, working medium runner in these two strands of air-flows will be used pipeline connection, make from oxygen-eliminating device (2) water outlet stream with, carry out in NB through the part production of steam process of the working medium of the GT exhaust heating of afterburning (comprising arbitrary process that evaporation is overheated and pine for again) not.
2, by the described parallel operation integrally-circulating power station of claim 1, the exhaust outlet that it is characterized in that smoke generator GT is connected with the suction port of exhaust heat boiler HRSG, and the fume pipe that GT is exported between exhaust heat boiler HRSG outlet is divided into two-way, one tunnel straight-through HRSG air outlet, another road is connected to the intake grill of conventional boiler NB burner hearth.Allow the exhaust of part GT flow into HRSG, and GT exhaust afterburning in NB of another part.Simultaneously, the working medium runner of HRSG and NB is connected with pipeline, the part production of steam process of the working medium of afterburning GT flue gas heating is not stayed among the NB and is carried out in HRSG.
3, by the described parallel operation integrally-circulating power station of claim 1, it is characterized in that the relief opening of smoke generator GT is connected with the suction port of exhaust heat boiler HRSG, and the air air intake pipe that starts from atmosphere is connected with the intake grill of conventional boiler NB burner hearth, allows air burn in NB.Simultaneously, the working medium runner of HRSG and NB is connected with pipeline, made from oxygen-eliminating device (2) water outlet and flow out, the part production of steam process of the working medium of GT exhaust heating is stayed among the NB and is carried out in HRSG.
4, the described parallel operation integrally-circulating power station of claim 1 is characterized in that when the smoke generator GT more than two exists, and the air outlet of a part of GT wherein can be connected with the flue gas inlet of its exhaust heat boiler HRSG separately with pipeline.And the air outlet of all the other each GT is connected with the burner hearth intake grill of its conventional boiler NB separately, allows part GT exhaust enter HRSG, and afterburning among the NB is advanced in the exhaust of another part GT.Simultaneously the working medium runner of HRSG and NB is connected with pipeline, made from the outflow of oxygen-eliminating device (2) water outlet and among NB, carry out through the part production of steam process of the working medium of the GT of HRSG exhaust heating.
5, claim 2,3,4 described parallel operation integrally-circulating power stations, it is characterized in that the steam (vapor) outlet of exhaust heat boiler HRSG is connected with the import of the superheater (8) of conventional boiler NB, the outlet of (8) is connected with the steam inlet of steam turbine ST among the NB, part production of steam process through the working medium of HRSG heating is changed over to and carries out in NB.
6, claim 2,3,4 described parallel operation integrally-circulating power stations, it is characterized in that the outlet with exhaust heat boiler HRSG superheater (9) connects the steam inlet of steam turbine ST, simultaneously, again with the outlet of the feed water preheater (11) of HRSG, connect the inlet of conventional boiler NB vaporizer (6), make the part feedwater of (11) change and in NB, produce steam over to.
7, the described parallel operation integrally-circulating power station of claim 1, it is characterized in that outlet with exhaust heat boiler HRSG superheater (9), connect the steam inlet of steam turbine ST, simultaneously, again with the outlet of the vaporizer (10) of HRSG, connect the inlet of conventional boiler NB superheater (8), the part working medium of (10) is changed over to and heating steam in NB.
8, claim 2,3,4 described parallel operation integrally-circulating power stations, for pattern of fever electric power station system again, it is characterized in that and the steam in the reheated steam pipeline can be redistributed, make the steam that enters exhaust heat boiler HRSG advance to lack than independent operating, and the vapor phase that enters conventional boiler NB should increase, thereby reach the part production of steam process among the HRSG is stayed the purpose of carrying out among the NB.
9, the described parallel operation integrally-circulating power station of claim 1, the exhaust outlet pipeline that it is characterized in that smoke generator GT is divided into two-way, one the tunnel is connected with the flue of conventional boiler NB, another road is connected with the burner hearth intake grill of NB, allow the exhaust of part GT just enter the flue of NB without afterburning, the GT exhaust of another part enters the burner hearth burning of NB.Flow out to from oxygen-eliminating device (2) water outlet that the part production of steam process of the working medium that heats the GT exhaust of afterburning not is inevitable carry out in NB.
10, the described parallel operation integrally-circulating power station of claim 1, it is characterized in that the exhaust outlet pipeline of cigarette vapour generator GT is connected on the flue of conventional boiler NB, and the air intake pipe of NB burner hearth starts from atmosphere, allow the steam discharge of GT just enter the flue of NB, and the burner hearth of NB suck air burning from atmosphere without afterburning.Flow out to from oxygen-eliminating device (2) water outlet that the part production of steam process of the working medium that heats the GT exhaust of afterburning not is inevitable carry out in NB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95110984 CN1132329A (en) | 1995-03-25 | 1995-03-25 | Parallel operation type combined cycle power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95110984 CN1132329A (en) | 1995-03-25 | 1995-03-25 | Parallel operation type combined cycle power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1132329A true CN1132329A (en) | 1996-10-02 |
Family
ID=5078310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95110984 Pending CN1132329A (en) | 1995-03-25 | 1995-03-25 | Parallel operation type combined cycle power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1132329A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294379C (en) * | 2002-01-17 | 2007-01-10 | 努特埃里克森公司 | Feedwater heater |
| CN100424413C (en) * | 2000-09-01 | 2008-10-08 | 株式会社东芝 | Feed water heater |
| CN103062744A (en) * | 2011-10-19 | 2013-04-24 | 通用电气公司 | Heat recovery steam generator and methods of coupling same to combined cycle power plant |
-
1995
- 1995-03-25 CN CN 95110984 patent/CN1132329A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424413C (en) * | 2000-09-01 | 2008-10-08 | 株式会社东芝 | Feed water heater |
| CN1294379C (en) * | 2002-01-17 | 2007-01-10 | 努特埃里克森公司 | Feedwater heater |
| CN103062744A (en) * | 2011-10-19 | 2013-04-24 | 通用电气公司 | Heat recovery steam generator and methods of coupling same to combined cycle power plant |
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