CN103133069A - Vapor Rankine-ammonia vapor Rankine combined cycle power generation device - Google Patents
Vapor Rankine-ammonia vapor Rankine combined cycle power generation device Download PDFInfo
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- CN103133069A CN103133069A CN2013100293671A CN201310029367A CN103133069A CN 103133069 A CN103133069 A CN 103133069A CN 2013100293671 A CN2013100293671 A CN 2013100293671A CN 201310029367 A CN201310029367 A CN 201310029367A CN 103133069 A CN103133069 A CN 103133069A
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- ammoniacal liquor
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- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 159
- 238000010248 power generation Methods 0.000 title abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 284
- 238000009833 condensation Methods 0.000 claims abstract description 24
- 230000005494 condensation Effects 0.000 claims abstract description 24
- 238000009834 vaporization Methods 0.000 claims abstract description 12
- 230000008016 vaporization Effects 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 44
- 239000006200 vaporizer Substances 0.000 claims description 39
- 239000003546 flue gas Substances 0.000 claims description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 22
- 229920006395 saturated elastomer Polymers 0.000 claims description 17
- 230000015572 biosynthetic process Effects 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 6
- 230000020169 heat generation Effects 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 description 13
- 239000003517 fume Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000011160 research Methods 0.000 description 6
- 239000002918 waste heat Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000003416 augmentation Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009711 regulatory function Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- HTJJPCOQQINRDG-UHFFFAOYSA-L calcium azane dichloride Chemical compound N.[Cl-].[Cl-].[Ca+2] HTJJPCOQQINRDG-UHFFFAOYSA-L 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- HAAFARYZKVVJHG-UHFFFAOYSA-M sodium azane thiocyanate Chemical compound N.[Na]SC#N HAAFARYZKVVJHG-UHFFFAOYSA-M 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to a vapor Rankine-ammonia vapor Rankine combined cycle power generation device. A condenser for the vapor Rankine cycle serves as an evaporator for the ammonia vapor Rankine cycle; a plenty of latent heat of vaporization released through the vapor condensation is used for the efficient ammonia vapor Rankine cycle power generation by utilizing the characteristic of higher utilization efficiency of an ammonia vapor Rankine cycle system for a medium and low temperature heat source; more than 50 kilowatt hours per each ton of the vapor can be recycled only by utilizing the latent heat of vaporization of the vapor of the vapor Rankine cycle for the power generation; at the same time, the safety difficulty of recycling the afterheat of the smoke through the ammonia Rankine cycle is solved, the temperature of the exhaust smoke is reduced efficiently, and low-temperature corrosion of the smoke is avoided. The vapor Rankine-ammonia vapor Rankine combined cycle power generation device not only can be used for energy-saving reconstruction of the conventional machine set, but also can be used for the design and construction of newly built machine sets, and has remarkable economic, social and environmental protection benefits.
Description
Technical field
The present invention relates to a kind of steam Rankine-ammonia steam Rankine combined cycle generating unit, specifically belong to the thermal power plant field of power equipment technology.
Background technique
Thermal power plant take water vapor as working medium is to carry out on a large scale heat energy is transformed into mechanical energy, and the factory that transforms mechanical energy into electricity again.The circulation that the power station is used is very complicated, yet in essence, the Rankine cycle that mainly is comprised of equipment such as boiler, steam turbine, vapour condenser, water pumps is completed, its working principle is: feedwater is first sent into boiler after the feed water pump pressurization, water is heated the superheated vapor of vaporization, formation High Temperature High Pressure in boiler, the superheated vapor acting of expanding in steam turbine, become the exhaust steam of low-temp low-pressure, enter at last vapour condenser and be condensed into condensed water, again through water pump, condensed water is sent into boiler and carry out new circulation.The complex loops of using as for the thermal power plant only on the Rankine cycle basis, in order to improve the thermal efficiency, is improved and the new circulation that forms is the backheat circulation, and the medium of backheat is water.Rankine cycle has become the basic circulation of modern steam power plant.
Modern big-and-middle-sized steam power plant all adopts the heated feed water backheat circulation of drawing gas without any exception, employing is drawn gas after the backheat heated feed water, feed temperature is improved, thereby improved the heating mean temperature, except having improved significantly thermal efficiency of cycle, though specific steam consumption increases to some extent, the steam discharge rate is reduced, this is conducive to the internal efficiency ratio η of i.e. this circulation of ratio of actual acting amount and theoretical acting amount
oiRaising, solved simultaneously the difficulty of large steam turbine exhaust stage blade negotiability restriction, the vapour condenser volume also can correspondingly reduce.But still discharge a large amount of latent heats of vaporization when steam condenses in vapour condenser, need a large amount of water or air to carry out cooling, namely wasted heat, caused thermo-pollution, wasted again electric energy, water resources.The a large amount of latent heat of vaporization that discharges when therefore how effectively to utilize steam condensation in vapour condenser is worth further investigation.
Give off a large amount of flue gases in the station boiler production process, wherein the heat of recoverable is a lot.Although this part residual heat resources waste is huge, recycling has larger difficulty, and its main cause is: the quality of (1) waste heat is lower, does not find the method for effectively utilizing; (2) reclaim the waste heat of this part flue gas, often the original thermodynamic system of boiler is made change, have certain risk; (3) thermal balance question is difficult to tissue, is difficult to all directly utilize in inside plants, often needs outwards to seek suitable hot user, and hot user often have fluctuation with heat load, thereby limited the versatility of recovery method.
Gu Wei etc. (present Research and the development trend [J] of low temperature heat energy generating. thermal power engineering .2007.03.Vol.22, No.2.) introduced present Research and the development trend of domestic and international low temperature heat energy generation technology.From the development of low temperature heat energy generation technology research in recent years, research work mainly concentrates on aspects such as the improvement of the research of power cycle working medium and cyclic process and optimal controls.Kalina circulation, ammonia absorption type power refrigeration combined cycle etc. can reach the capacity usage ratio higher than simple cycle in theory.Significant when becoming factor on the affecting of system based on the generating of the low temperature heat energy of Finite-Time Thermodynamics when considering, may realize the maximization that the energy of system utilizes.Improving generating efficiency and environmental protection is the core content of Low Temperature Thermal power technology.Kalina circulation, the ammonia absorption type power refrigeration combined cycle scheduling theory mentioned in literary composition merit attention.
Above-mentionedly mention that card Linne power generation technology also has its intrinsic shortcoming: have inflammable, the explosive characteristics such as poisonous as ammonia, when boiler or industrial furnace back-end ductwork utilize fume afterheat tissue card Linne circulating generation, dust etc. in flue gas must be considered to the leakage that the wearing and tearing that are arranged in the heat exchanger in flue, corrosion etc. cause, the explosion protection of drawing thus and protection of environment and job site etc. must be considered; Card Linne circulation take ammonia water mixture as working medium, the ammonia in ammoniacal liquor is inflammable, explosive, poisonous medium.This is card Linne power generation technology reclaims dust-laden, must solve when the fume afterheat of corrosive deposit is arranged in electric power station system a difficult problem.
Therefore how to utilize the thermomechanics basic law in steam Rankine cycle thermal power plant, use for reference the innovative approach that the combined cycle scheduling theories such as thinking and Rankine-Kalina are organized in compound Rankine cycle, reservation is based on the advantage of the power plant technology of Rankine cycle principle, inquire into new combined cycle theoretical, really find the new way that increases substantially the thermodynamic cycle power plant thermal efficiency, become the difficult point of this area research.
Summary of the invention
the problem that purpose of the present invention exists for solving above-mentioned steam Rankine cycle and card Linne circulating technology, a kind of new thermal power plant's combined cycle flow process is proposed, it is steam Rankine-ammonia steam Rankine combined cycle generating unit, can carry out reducing energy consumption to existing steam Rankine cycle, solved simultaneously the key issue of ammonia steam Rankine cycle unit safety operation, a large amount of latent heat of vaporization that in recovered steam Rankine cycle vapour condenser, steam condensation discharges is used for low-temperature end ammonia steam Rankine cycle generating, thereby realize effectively improving the thermal efficiency of whole Combined Cycle Unit, finally reach energy-saving and cost-reducing, improve the purpose of system thermal efficiency.
The objective of the invention is to realize by following measures:
A kind of steam Rankine-ammonia steam Rankine combined cycle generating unit, this device comprises steam Rankine cycle, the Rankine cycle of ammonia steam, it is characterized in that:
Described steam Rankine cycle refers to by boiler body 1 saturated vapour 2 out, forms superheated vapor 3-1 through superheater 3, sends into steam turbine 4 and drives steam-driven generator 21 generatings; Steam turbine 4 exhaust steam 5 out enters condenser/evaporator 10 and forms water of condensation 6, and water of condensation 6 is sent into boiler body 1 through condensate pump 6-1, oxygen-eliminating device 7-1, feed water pump 7, feed water preheater 8, then produces saturated vapour, thereby forms steam Rankine cycle loop.
The Rankine cycle of described ammonia steam, refer to that ammoniacal liquor 11 is through recycle pump 12, condenser/evaporator 10, the ammonia steam that produces is through exhaust steam regenerator 22, ammonia steam pipe line 24, superheater 9, form ammonia superheated vapor 16, enter ammonia steam turbine 17 and drag 20 generatings of ammonia generator, the exhaust steam of discharging from ammonia steam turbine 17 is through exhaust steam regenerator 22, the cooling formation ammoniacal liquor 11 of ammonia condenser 18, then enters recycle pump 12, thereby forms ammonia steam Rankine cycle loop.
Described steam Rankine cycle and ammonia steam Rankine cycle loop combine by condenser/evaporator 10, the latent heat of vaporization that in the Rankine cycle of high efficiente callback steam, steam condensation discharges is used for low-temperature end ammonia steam Rankine cycle generating, and the steam condensation side of described steam Rankine cycle is negative pressure.
The 4-1 that draws gas that described superheater 9 adopts steam turbine 4 in the steam Rankine cycle is as thermal source, and the 4-1 that draws gas returns to the steam Rankine cycle system through the cooling formation condensed water 26 of superheater 9.
Described ammoniacal liquor 11 is the ammonia of one-component, or take ammonia as low boiling component, high boiling component is mixed solution such as ammonia-aqueous solution, ammonia-sodium thiocyanate solution or the ammonia-calcium chloride solution etc. of absorbing agent.
When described ammoniacal liquor is Multi component, be provided with regenerator 15: ammoniacal liquor 11 is through recycle pump 12, regenerator 15, condenser/evaporator 10, the lean solution that forms is returned to ammonia condenser 18 through regenerator 15, the pipeline 19 that backflows, the ammonia steam that produces forms ammoniacal liquor 11 through exhaust steam regenerator 22, superheater 9, ammonia steam turbine 17, ammonia condenser 18, return recycle pump 12, thereby form ammonia steam Rankine cycle loop.
Be provided with heat exchanger 13: when heat exchanger 13 is phase-change heat-exchanger, comprise vaporizer 13-1, condenser 13-2, wherein vaporizer 13-1 is arranged in flue 23, and condenser 13-2 is arranged in outside flue 23, and phase-change working substance adopts water or other suitable materials; Flue gas adopts the separated type heat exchange mode by phase-change working substance and the condenser/evaporator 10 ammonia steam out of phase-change heat-exchanger: phase-change working substance absorbs the heat generation saturated vapour of flue gas in vaporizer 13-1, saturated vapour is as the thermal source of ammonia steam, by condenser 13-2 and ammonia steam wall-type heat exchange, cooling rear formation condensation water produces steam again by the heat of vaporizer 13-1 absorption flue gas again, thereby forms the interior circulation loop of phase-change working substance; Phase-change working substance adopts natural circulation or pump circulation mode; The ammonia steam of condenser/evaporator 10 outlets is through the condenser 13-2 of ammonia steam pipe line 25, heat exchanger 13, the ammonia superheated vapor 16 that forms enters ammonia steam turbine 17, get back to condenser/evaporator 10 through exhaust steam regenerator 22, ammonia condenser 18, recycle pump 12 again, thus ammonia steam Rankine cycle loop.
Be provided with ammoniacal liquor vaporizer 14: ammoniacal liquor vaporizer 14 adopts the exhaust steam of ammonia steam turbine 17 outlets as thermal source, the ammonia steam that produces is through exhaust steam regenerator 22, superheater 9, ammonia steam turbine 17, drag 20 generatings of ammonia generator, the exhaust steam that ammonia steam turbine 17 is discharged is through exhaust steam regenerator 22, ammoniacal liquor vaporizer 14, the cooling formation ammoniacal liquor 11 of ammonia condenser 18, enter again recycle pump 12, ammoniacal liquor vaporizer 14, thereby form ammonia steam Rankine cycle loop; As when being the multicomponent ammoniacal liquor, the lean solution that ammoniacal liquor vaporizer 14 produces is got back to ammonia condenser 18 through the pipeline 27 that backflows, condenser/evaporator 10, regenerator 15, the pipeline 19 that backflows.
Described feed water preheater 8, superheater 9, condenser/evaporator 10, regenerator 15, heat exchanger 13, ammoniacal liquor vaporizer 14, exhaust steam regenerator 22 can arrange respectively one or more, adopt series, parallel or series-parallel connection mode to connect.
The air 30 that gas fan 31 is sent here enters air preheater 32, form hot air 33, enter fuel-burning equipment 34 and participate in burning, the high-temperature flue gas of generation is discharged after reducing temperature through boiler body 1, superheater 2, feed water preheater 8, air preheater 32, vaporizer 13-1.
Described ammonia condenser 18 arranges according to routine techniques, adopts water or air etc. as cooling medium.
In the present invention, the heat-exchanging element of mentioned aforementioned device can adopt tubulation, fin tube, coiler or spiral groove pipe, or adopts the pipe of other augmentation of heat transfer measures or the hollow cavity heat-exchanging element of other patterns.
Control a little higher than flue gas acid dew point temperature of wall surface temperature of vaporizer 13-1 heat exchanger surface, or the cold end corrosion of adopting corrosion-resistant material effectively to alleviate flue gas, can effectively reduce temperature of exhaust fume, when avoiding the flue gas low-temperature corrosion, the high efficiente callback fume afterheat.
Unaccounted equipment and standby system thereof, pipeline, instrument, valve in the present invention, be incubated, have the known mature technologies of employing such as regulatory function bypass facility and carry out supporting.
Be provided with the regulating controller with system support of the present invention, the known Mature Regulation technology of the existing steam Rankine cycle of employing power station, Cheng's cycle power station or gas-steam combined cycle power plant is carried out supporting, make steam Rankine-Ka Linne combined cycle generating unit energy economy, safety, high thermal efficiency operation, reach energy-saving and cost-reducing purpose.
The present invention has following advantage compared to existing technology:
1, energy-saving effect is remarkable: the steam Rankine of the present invention's design-ammonia steam Rankine combined cycle generating unit, with the vapour condenser of the steam Rankine cycle vaporizer as the Rankine cycle of ammonia steam, utilize the utilization of ammonia steam Rankine cycle system centering low-temperature heat source that more high efficiency characteristics are arranged, a large amount of latent heats of vaporization that steam Rankine cycle steam condensation is discharged are used for ammonia steam Rankine cycle efficiency power generation, only utilize the latent heat of vaporization of steam just 50 degree/more than ton steam nearly of this piece that generate electricity; The absolute amplitude that vapour condenser in the Rankine cycle of ammonia steam in the more traditional steam Rankine cycle of ammonia condenser load alleviates reaches more than 15%, and the power consumption of cooling circulating water significantly reduces.
2, the three wastes of power plant are realized integrated utilization: when the heat exchanger that back-end ductwork arranges adopts phase-change heat-exchanger, waste heat that can the high efficiente callback flue gas, temperature of exhaust fume can be reduced to 120 ℃ of left and right, when the phase-change heat-exchanger vaporizer adopts resistant material, temperature of exhaust fume can reduce more, reach 85 ℃ of left and right, operation to system for desulfuration and denitration is very favourable, when effectively avoiding the flue gas low-temperature corrosion, the heat that reclaims is used for ammonia steam Rankine cycle system efficiency power generation, more meets the cascaded utilization of energy principle.The waste heats such as the waste water that the steam Rankine cycle system produces, waste vapour all can be included ammonia steam Rankine cycle system in and recycle.Fundamentally eliminated other waste gas, waste water, waste vapour waste heat recovering device to the impact of whole unit circulation system, realized the integrated utilization of the real meaning of whole power plant system waste heat, water saving, joint vapour, economize on electricity texts are obvious.
3, drawing gas as the thermal source of steam in the Rankine cycle of ammonia steam of employing steam turbine further reclaimed sensible heat, the latent heat of vaporization of drawing gas and is used for ammonia steam Rankine cycle generating, and the benefit of whole Combined Cycle Unit is further improved.
4, the solution of the present invention both can be used for design, the construction of newly-built combined power plants system, also can be used for existing pure condensate formula, sucking condensing type unit are carried out reducing energy consumption, thermodynamic cycle to existing unit does not have a negative impact, energy is the energy-saving potential of excavating device fully, meet simultaneously the industrial policy of country, economy and environmental benefit are remarkable.
Description of drawings
Fig. 1 is a kind of steam Rankine of the present invention-ammonia steam Rankine combined cycle generating unit schematic flow sheet.
in Fig. 1: the 1-boiler body, the 2-saturated vapour, the 3-superheater, the 3-1-superheated vapor, the 4-steam turbine, 4-1-draws gas, the 5-exhaust steam, the 6-water of condensation, the 6-1-condensate pump, the 7-feed water pump, the 7-1-oxygen-eliminating device, the 8-feed water preheater, the 9-superheater, the 10-condenser/evaporator, the 11-ammoniacal liquor, the 12-recycle pump, the 13-heat exchanger, the 13-1-vaporizer, the 13-2-condenser, 14-ammoniacal liquor vaporizer, the 15-regenerator, 16-ammonia superheated vapor, 17-ammonia steam turbine, the 18-ammonia condenser, the 19-liquid that backflows, 20-ammonia generator, the 21-steam-driven generator, 22-exhaust steam regenerator, the 23-flue, 24-ammonia steam pipe line, 25-ammonia steam pipe line, the 26-water of condensation, the 27-pipeline that backflows, the 30-air, the 31-gas fan, the 32-air preheater, the 33-hot air, the 34-fuel-burning equipment.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment 1:
As shown in Figure 1, a kind of steam Rankine-ammonia steam Rankine Rankine combined cycle generating unit, this device comprises steam Rankine cycle, ammonia steam Rankine cycle system, specific embodiment is as follows:
Described steam Rankine cycle refers to by boiler body 1 saturated vapour 2 out, forms superheated vapor 3-1 through superheater 3, sends into steam turbine 4 and drives steam-driven generator 21 generatings; Steam turbine 4 exhaust steam 5 out enters condenser/evaporator 10 and forms water of condensation 6, and water of condensation 6 is sent into boiler body 1 through condensate pump 6-1, oxygen-eliminating device 7-1, feed water pump 7, feed water preheater 8, then produces saturated vapour, thereby forms steam Rankine cycle loop.
The Rankine cycle of described ammonia steam, refer to that ammoniacal liquor 11 is through recycle pump 12, regenerator 15, condenser/evaporator 10, the lean solution that forms is returned to ammonia condenser 18 through regenerator 15, the pipeline 19 that backflows, the ammonia steam that produces is through exhaust steam regenerator 22, superheater 9, ammonia steam turbine 17, the exhaust steam of discharging from ammonia steam turbine 17 forms ammoniacal liquor 11 through exhaust steam regenerator 22, ammonia condenser 18, return recycle pump 12, thereby form ammonia steam Rankine cycle loop;
Or ammoniacal liquor 11 is through recycle pump 12, condenser/evaporator 10, the ammonia steam that produces enters heat exchanger 13 through ammonia steam pipe line 25, form ammonia superheated vapor 16, enter ammonia steam turbine 17 and drag 20 generatings of ammonia generator, the exhaust steam of discharging from ammonia steam turbine 17 is through the cooling formation ammoniacal liquor 11 of ammonia condenser 18, enter again recycle pump 12, thereby form ammonia steam Rankine cycle loop;
Described steam Rankine cycle and ammonia steam Rankine cycle loop combine by condenser/evaporator 10, the latent heat of vaporization that in the Rankine cycle of high efficiente callback steam, steam condensation discharges is used for low-temperature end ammonia steam Rankine cycle generating, and the steam condensation side of described steam Rankine cycle is negative pressure.
The 4-1 that draws gas that described superheater 9 adopts steam turbine 4 in the steam Rankine cycle is as thermal source, and the 4-1 that draws gas returns to the steam Rankine cycle system through the cooling formation condensed water 26 of superheater 9.
When described heat exchanger 13 is phase-change heat-exchanger, comprise vaporizer 13-1, condenser 13-2, wherein vaporizer 13-1 is arranged in flue 23, and condenser 13-2 is arranged in outside flue 23, and phase-change working substance adopts water; Flue gas adopts the separated type heat exchange mode by phase-change working substance and the condenser/evaporator 10 ammonia steam out of phase-change heat-exchanger 13: phase-change working substance absorbs the heat generation saturated vapour of flue gas in vaporizer 13-1, saturated vapour is as the thermal source of ammonia steam, by condenser 13-2 and ammonia steam wall-type heat exchange, cooling rear formation condensation water produces steam again by the heat of vaporizer 13-1 absorption flue gas again, thereby forms the interior circulation loop of phase-change working substance; Phase-change working substance adopts natural circulation mode; The ammonia steam of condenser/evaporator 10 outlet shuntings place is through the condenser 13-2 of ammonia steam pipe line 25, heat exchanger 13, the ammonia steam that forms enters ammonia steam turbine 17 through superheater 9, get back to condenser/evaporator 10 through exhaust steam regenerator 22, ammonia condenser 18, recycle pump 12 again, thereby form ammonia steam Rankine cycle loop.
Be provided with ammoniacal liquor vaporizer 14: ammoniacal liquor vaporizer 14 adopts the exhaust steam of ammonia steam turbine 17 outlets as thermal source, the ammonia steam that produces is through exhaust steam regenerator 22, superheater 9, ammonia steam turbine 17, drag 20 generatings of ammonia generator, the exhaust steam that ammonia steam turbine 17 is discharged is through exhaust steam regenerator 22, ammoniacal liquor vaporizer 14, the cooling formation ammoniacal liquor 11 of ammonia condenser 18, enter again recycle pump 12, ammoniacal liquor vaporizer 14, thereby form ammonia steam Rankine cycle loop; The lean solution that ammoniacal liquor vaporizer 14 produces is got back to ammonia condenser 18 through the pipeline 27 that backflows, condenser/evaporator 10, regenerator 15, the pipeline 19 that backflows.
Described feed water preheater 8, superheater 9, condenser/evaporator 10, regenerator 15, heat exchanger 13, ammoniacal liquor vaporizer 14, exhaust steam regenerator 22 can arrange respectively one or more, adopt series, parallel or series-parallel connection mode to connect.
The air 30 that gas fan 31 is sent here enters air preheater 32, form hot air 33, enter fuel-burning equipment 34 and participate in burning, the high-temperature flue gas of generation is discharged after reducing temperature through boiler body 1, superheater 2, feed water preheater 8, air preheater 32, vaporizer 13-1.
Described ammonia condenser 18 arranges according to routine techniques, adopts water or air etc. as cooling medium.
In the present invention, the heat-exchanging element of mentioned aforementioned device can adopt tubulation, fin tube, coiler or spiral groove pipe, or adopts the pipe of other augmentation of heat transfer measures or the hollow cavity heat-exchanging element of other patterns.
Control a little higher than flue gas acid dew point temperature of wall surface temperature of vaporizer 13-1 heat exchanger surface, or the cold end corrosion of adopting corrosion-resistant material effectively to alleviate flue gas, can effectively reduce temperature of exhaust fume, when avoiding the flue gas low-temperature corrosion, the high efficiente callback fume afterheat.
Unaccounted equipment and standby system thereof, pipeline, instrument, valve in the present invention, be incubated, have the known mature technologies of employing such as regulatory function bypass facility and carry out supporting.
Be provided with the regulating controller with system support of the present invention, the known Mature Regulation technology of the existing steam Rankine cycle of employing power station, Cheng's cycle power station or gas-steam combined cycle power plant is carried out supporting, make steam Rankine-organic Rankine combined cycle generating unit energy economy, safety, high thermal efficiency operation, reach energy-saving and cost-reducing purpose.
Although the present invention with preferred embodiment openly as above, they are not to limit the present invention, anyly are familiar with this skill person, without departing from the spirit and scope of the invention, certainly when making various changes or retouch, belong to equally the present invention's protection domain.Therefore protection scope of the present invention should with the application claim was defined is as the criterion.
Claims (9)
1. steam Rankine-ammonia steam Rankine combined cycle generating unit, this device comprises steam Rankine cycle and ammonia steam Rankine cycle system, it is characterized in that:
Described steam Rankine cycle refers to by boiler body (1) saturated vapour (2) out, forms superheated vapor (3-1) through superheater (3), sends into steam turbine (4) and drives steam-driven generator (21) generating; Steam turbine (4) exhaust steam (5) out forms water of condensation (6) through condenser/evaporator (10), water of condensation (6) is through feed water pump (7), boiler body (1), produce again saturated vapour, thereby form steam Rankine cycle loop;
The Rankine cycle of described ammonia steam, refer to that ammoniacal liquor (11) is through recycle pump (12), condenser/evaporator (10), the ammonia steam that produces enters superheater (9) through ammonia steam pipe line (24), form ammonia superheated vapor (16), enter ammonia steam turbine (17) and drag ammonia generator (20) generating, the exhaust steam of discharging from ammonia steam turbine (17) is through the cooling formation ammoniacal liquor of ammonia condenser (18) (11), enter again recycle pump (12), thereby form ammonia steam Rankine cycle loop; Or ammoniacal liquor (11) is through recycle pump (12), condenser/evaporator (10), the ammonia steam that produces enters heat exchanger (13) through ammonia steam pipe line (25), form ammonia superheated vapor (16), enter ammonia steam turbine (17) and drag ammonia generator (20) generating, the exhaust steam of discharging from ammonia steam turbine (17) is through the cooling formation ammoniacal liquor of ammonia condenser (18) (11), enter again recycle pump (12), thereby form ammonia steam Rankine cycle loop;
Draw gas (4-1) of described steam turbine (4) forms condensed water (26) through superheater (9), returns to the steam Rankine cycle system;
Described steam Rankine cycle and ammonia steam Rankine cycle loop combine by condenser/evaporator (10), and the latent heat of vaporization that in the Rankine cycle of high efficiente callback steam, steam condensation discharges is used for low-temperature end ammonia steam Rankine cycle generating.
2. device according to claim 1 is characterized in that:
Be provided with feed water preheater (8):
By boiler body (1) saturated vapour (2) out, form superheated vapor (3-1) through superheater (3), send into steam turbine (4) and drive steam-driven generator (21) generating; Steam turbine (4) exhaust steam (5) out forms water of condensation (6) through condenser/evaporator (10), and water of condensation (6) is through feed water pump (7), feed water preheater (8), boiler body (1), then produces saturated vapour, thereby forms steam Rankine cycle loop.
3. device according to claim 1 is characterized in that:
Be provided with oxygen-eliminating device (7-1):
By boiler body (1) saturated vapour (2) out, form superheated vapor (3-1) through superheater (3), send into steam turbine (4) and drive steam-driven generator (21) generating; Steam turbine (4) exhaust steam (5) out forms water of condensation (6) through condenser/evaporator (10), water of condensation (6) is through condensate pump (6-1), oxygen-eliminating device (7-1), feed water pump (7), boiler body (1), produce again saturated vapour, thereby form steam Rankine cycle loop.
4. device according to claim 1 is characterized in that:
Be provided with exhaust steam regenerator (22):
Ammoniacal liquor (11) is through recycle pump (12), condenser/evaporator (10), the ammonia steam that produces enters superheater (9) through exhaust steam regenerator (22), ammonia steam pipe line (24), form ammonia superheated vapor (16), enter ammonia steam turbine (17) and drag ammonia generator (20) generating, the exhaust steam of discharging from ammonia steam turbine (17) is through the cooling formation ammoniacal liquor of ammonia condenser (18) (11), enter again recycle pump (12), thereby form ammonia steam Rankine cycle loop.
5. device according to claim 4 is characterized in that:
Be provided with ammoniacal liquor vaporizer (14):
Ammoniacal liquor (11) through recycle pump (12), ammoniacal liquor vaporizer (14) or and exhaust steam regenerator (22), ammonia steam pipe line (24), superheater (9), enter ammonia steam turbine (17) and drag ammonia generator (20) generating, the exhaust steam that ammonia steam turbine (17) is discharged is through exhaust steam regenerator (22), ammoniacal liquor vaporizer (14), the cooling formation ammoniacal liquor of ammonia condenser (18) (11), enter again recycle pump (12), ammoniacal liquor vaporizer (14), thereby form ammonia steam Rankine cycle loop.
One of according to claim 1 to 5 described device, it is characterized in that:
Described heat exchanger (13) is phase-change heat-exchanger, comprises vaporizer (13-1), condenser (13-2), and wherein vaporizer (13-1) is arranged in flue (23), and condenser (13-2) is arranged in outside flue (23); Flue gas adopts the separated type heat exchange mode by phase-change working substance and condenser/evaporator (10) ammonia steam out: phase-change working substance absorbs the heat generation saturated vapour of flue gas in vaporizer (13-1), saturated vapour is as the thermal source of ammonia steam, by condenser (13-2) and ammonia steam wall-type heat exchange, cooling rear formation condensation water is absorbed the heat generation steam of flue gas again by vaporizer (13-1), thereby forms the interior circulation loop of phase-change working substance; The ammonia steam that condenser/evaporator (10) outlet distributes is through ammonia steam pipe line (25), condenser (13-2), the ammonia superheated vapor (16) that forms enters ammonia steam turbine (17), get back to condenser/evaporator (10) through ammonia condenser (18), recycle pump (12) again, thereby form ammonia steam Rankine cycle loop.
One of according to claim 1 to 5 described device, it is characterized in that:
Be provided with regenerator (15):
ammoniacal liquor (11) is through recycle pump (12), regenerator (15), condenser/evaporator (10), the lean solution that forms is through regenerator (15), the pipeline (19) that backflows returns to ammonia condenser (18), or the lean solution that ammoniacal liquor vaporizer (14) produces is through the pipeline that backflows (27), condenser/evaporator (10), regenerator (15), the pipeline (19) that backflows is got back to ammonia condenser (18), condenser/evaporator (10), the ammonia steam that ammoniacal liquor vaporizer (14) produces is through superheater (9) or heat exchanger (13), the ammonia superheated vapor (16) that forms is through ammonia steam turbine (17), ammonia condenser (18) forms ammoniacal liquor (11), return recycle pump (12), thereby formation ammonia steam Rankine cycle loop.
8. device according to claim 7 is characterized in that:
Be provided with air preheater (32): the air (30) that gas fan (31) is sent here forms hot air (33) through air preheater (32), enter fuel-burning equipment (34) and participate in burning, the high-temperature flue gas of generation through boiler body (1), superheater (2) or and feed water preheater (8), air preheater (32) or and heat exchanger (13) discharge after reducing temperature.
9. device according to claim 8 is characterized in that:
Described superheater (3), feed water preheater (8), superheater (9), condenser/evaporator (10), heat exchanger (13), ammoniacal liquor vaporizer (14), air preheater (32), regenerator (15), exhaust steam regenerator (22) can arrange respectively one or more, adopt series, parallel or series-parallel connection mode to connect.
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