CN203271838U - Steam Rankine-low-boiling-point working medium Rankine combined-cycle power generating device - Google Patents

Steam Rankine-low-boiling-point working medium Rankine combined-cycle power generating device Download PDF

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CN203271838U
CN203271838U CN2013200421834U CN201320042183U CN203271838U CN 203271838 U CN203271838 U CN 203271838U CN 2013200421834 U CN2013200421834 U CN 2013200421834U CN 201320042183 U CN201320042183 U CN 201320042183U CN 203271838 U CN203271838 U CN 203271838U
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steam
condenser
working fluid
low boiling
boiling working
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王海波
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NANJING REKELAIMU ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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NANJING REKELAIMU ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/16Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The utility model relates to a steam Rankine-low-boiling-point working medium Rankine combined-cycle power generating device. The steam Rankine-low-boiling-point working medium Rankine combined-cycle power generating device has the advantages that a steam condenser for steam Rankine cycle is adopted as an evaporator for low-boiling-point working medium (such as ammonia steam) Rankine cycle, the characteristic that a low-boiling-point working medium Rankine cycle system has higher efficiency for utilizing medium-low-temperature heat sources is utilized, a great amount of vaporization latent heat released by steam condensation is used for low-boiling-point working medium Rankine cycle high-efficiency power generation, and the vaporization latent heat of the steam of the steam Rankine cycle is only used for generating power, so that more than 50kwh of electricity in every ton of steam is additionally recovered, simultaneously the safety difficulty of recovering waste heat of flue gas of low-boiling-point working medium Rankine cycle is solved, the smoke exhausting temperature is effectively reduced, and low-temperature corrosion of the flue gas is avoided. The steam Rankine-organic Rankine combined-cycle power generating device not only can be used for energy-saving modification of the existing unit, but also can be used for designing and building a new unit, and is obvious in economic, social and environment-protecting benefits.

Description

Steam Rankine-low boiling working fluid Rankine combined cycle generating unit
Technical field
The present invention relates to a kind of steam Rankine-low boiling working fluid 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-low boiling working fluid Rankine combined cycle generating unit, can carry out reducing energy consumption to existing steam Rankine cycle, solved simultaneously the key issue of low boiling working fluid 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 low boiling working fluid 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-low boiling working fluid Rankine combined cycle generating unit, this device comprises steam Rankine cycle, low boiling working fluid Rankine cycle, 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.
Described low boiling working fluid Rankine cycle, refer to that liquid refrigerant 11 is through recycle pump 12, condenser/evaporator 10, the low boiling working fluid steam that produces is through exhaust steam regenerator 22, low boiling working fluid steam pipe line 24, superheater 9, form low boiling working fluid superheated vapor 16, enter steam turbine 17 drawing generator 20 generatings, the exhaust steam of discharging from steam turbine 17 is through exhaust steam regenerator 22, the cooling formation liquid refrigerant 11 of condenser 18, then enters recycle pump 12, thereby forms low boiling working fluid Rankine cycle loop.
Described steam Rankine cycle and low boiling working fluid 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 low boiling working fluid 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 liquid refrigerant comprises low boiling working fluid, be one-component or multi-component mixing material take higher boiling working medium as absorbing agent, include but not limited to organic working medium, ammonia water mixture, the boiling point that low boiling working fluid is depressed at standard atmosphere is less than-10 ℃, and has good thermostability.
When described low boiling working fluid is Multi component, be provided with regenerator 15: liquid refrigerant 11 is through recycle pump 12, regenerator 15, condenser/evaporator 10, the lean solution that forms is returned to condenser 18 through regenerator 15, the pipeline 19 that backflows, the low boiling working fluid steam that produces forms liquid refrigerant 11 through exhaust steam regenerator 22, superheater 9, steam turbine 17, condenser 18, return recycle pump 12, thereby form low boiling working fluid 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 low boiling working fluid 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 low boiling working fluid steam, by condenser 13-2 and low boiling working fluid 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 low boiling working fluid steam of condenser/evaporator 10 outlets is through the condenser 13-2 of low boiling working fluid steam pipe line 25, heat exchanger 13, the low boiling working fluid superheated vapor 16 that forms enters steam turbine 17, get back to condenser/evaporator 10 through exhaust steam regenerator 22, condenser 18, recycle pump 12 again, thereby form low boiling working fluid Rankine cycle loop.
Be provided with liquid refrigerant vaporizer 14: liquid refrigerant vaporizer 14 adopts the exhaust steam of steam turbine 17 outlets as thermal source, the steam that produces is through exhaust steam regenerator 22, superheater 9, steam turbine 17, drawing generator 20 generatings, the exhaust steam that steam turbine 17 is discharged is through exhaust steam regenerator 22, liquid refrigerant vaporizer 14, the cooling formation liquid refrigerant 11 of condenser 18, enter again recycle pump 12, liquid refrigerant vaporizer 14, thereby form low boiling working fluid Rankine cycle loop; As when being multicomponent, the lean solution that liquid refrigerant vaporizer 14 produces is got back to 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, liquid refrigerant 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 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-low boiling working fluid Rankine 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-low boiling working fluid Rankine combined cycle generating unit, with the vapour condenser of the steam Rankine cycle vaporizer as the low boiling working fluid Rankine cycle, utilize the utilization of low boiling working fluid 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 low boiling working fluid 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 low boiling working fluid Rankine cycle in the more traditional steam Rankine cycle of condenser duty 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 low boiling working fluid 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 the low boiling working fluid 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 low boiling working fluid Rankine cycle of employing steam turbine further reclaimed sensible heat, the latent heat of vaporization of drawing gas and is used for low boiling working fluid 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-low boiling working fluid 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-liquid refrigerant, the 12-recycle pump, the 13-heat exchanger, the 13-1-vaporizer, the 13-2-condenser, 14-liquid refrigerant vaporizer, the 15-regenerator, 16-low boiling working fluid superheated vapor, the 17-steam turbine, the 18-condenser, the 19-liquid that backflows, the 20-generator, the 21-steam-driven generator, 22-exhaust steam regenerator, the 23-flue, 24-low boiling working fluid steam pipe line, 25-low boiling working fluid 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-low boiling working fluid Rankine Rankine combined cycle generating unit, this device comprises steam Rankine cycle, low boiling working fluid Rankine cycle system, specific embodiment is as follows:
Low boiling working fluid adopts ammonia water mixture;
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-ammonia steam 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-low boiling working fluid Rankine combined cycle generating unit, this device comprises steam Rankine cycle and low boiling working fluid 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), and water of condensation (6) is through feed water pump (7), boiler body (1), then produces saturated vapour, thereby forms steam Rankine cycle loop;
Described low boiling working fluid Rankine cycle, refer to that liquid refrigerant (11) is through recycle pump (12), condenser/evaporator (10), the low boiling working fluid steam that produces enters superheater (9) through low boiling working fluid steam pipe line (24), form low boiling working fluid superheated vapor (16), enter steam turbine (17) drawing generator (20) generating, the exhaust steam of discharging from steam turbine (17) is through the cooling formation liquid refrigerant of condenser (18) (11), enter again recycle pump (12), thereby form low boiling working fluid Rankine cycle loop; Or liquid refrigerant (11) is through recycle pump (12), condenser/evaporator (10), the low boiling working fluid steam that produces enters heat exchanger (13) through low boiling working fluid steam pipe line (25), form low boiling working fluid superheated vapor (16), enter steam turbine (17) drawing generator (20) generating, the exhaust steam of discharging from steam turbine (17) is through the cooling formation liquid refrigerant of condenser (18) (11), enter again recycle pump (12), thereby form low boiling working fluid 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 low boiling working fluid 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;
The boiling point that described low boiling working fluid is depressed at standard atmosphere is less than-10 ℃.
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), water of condensation (6) is through feed water pump (7), feed water preheater (8), boiler body (1), produce again saturated vapour, thereby form 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):
Liquid refrigerant (11) is through recycle pump (12), condenser/evaporator (10), the low boiling working fluid steam that produces enters superheater (9) through exhaust steam regenerator (22), low boiling working fluid steam pipe line (24), form low boiling working fluid superheated vapor (16), enter steam turbine (17) drawing generator (20) generating, the exhaust steam of discharging from steam turbine (17) is through the cooling formation liquid refrigerant of condenser (18) (11), enter again recycle pump (12), thereby form low boiling working fluid Rankine cycle loop.
One of according to claim 1 to 4 described device, it is characterized in that:
Be provided with liquid refrigerant vaporizer (14):
Liquid refrigerant (11) through recycle pump (12), liquid refrigerant vaporizer (14) or and exhaust steam regenerator (22), low boiling working fluid steam pipe line (24), superheater (9), enter steam turbine (17) drawing generator (20) generating, the exhaust steam that steam turbine (17) is discharged is through exhaust steam regenerator (22), liquid refrigerant vaporizer (14), the cooling formation liquid refrigerant of condenser (18) (11), enter again recycle pump (12), with its working medium vaporizer (14), thereby form low boiling working fluid Rankine cycle loop.
One of according to claim 1 to 4 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) low boiling working fluid 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 low boiling working fluid steam, by condenser (13-2) and low boiling working fluid 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 low boiling working fluid steam that condenser/evaporator (10) outlet distributes is through low boiling working fluid steam pipe line (25), condenser (13-2), the low boiling working fluid superheated vapor (16) that forms enters steam turbine (17), get back to condenser/evaporator (10) through condenser (18), recycle pump (12) again, thereby form low boiling working fluid Rankine cycle loop.
7. device according to claim 5 is characterized in that:
Be provided with regenerator (15):
liquid refrigerant (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 condenser (18), or the lean solution that liquid refrigerant vaporizer (14) produces is through the pipeline that backflows (27), condenser/evaporator (10), regenerator (15), the pipeline (19) that backflows is got back to condenser (18), condenser/evaporator (10), the low boiling working fluid steam that liquid refrigerant vaporizer (14) produces is through superheater (9) or heat exchanger (13), the low boiling working fluid superheated vapor (16) that forms is through steam turbine (17), condenser (18) forms liquid refrigerant (11), return recycle pump (12), thereby formation low boiling working fluid 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 (20 or and feed water preheater (8), air preheater (320 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), liquid refrigerant 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.
CN2013200421834U 2013-01-27 2013-01-27 Steam Rankine-low-boiling-point working medium Rankine combined-cycle power generating device Active CN203271838U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103133070A (en) * 2013-01-27 2013-06-05 南京瑞柯徕姆环保科技有限公司 Vapor Rankine-low boiling point working medium Rankine combined cycle power generation device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103133070A (en) * 2013-01-27 2013-06-05 南京瑞柯徕姆环保科技有限公司 Vapor Rankine-low boiling point working medium Rankine combined cycle power generation device
CN103133070B (en) * 2013-01-27 2015-03-04 南京瑞柯徕姆环保科技有限公司 Vapor Rankine-low boiling point working medium Rankine combined cycle power generation device

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