CN102040258A - Coproduction method and equipment for thermal power generation and distillation sea water desalinization - Google Patents
Coproduction method and equipment for thermal power generation and distillation sea water desalinization Download PDFInfo
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- CN102040258A CN102040258A CN2010105258539A CN201010525853A CN102040258A CN 102040258 A CN102040258 A CN 102040258A CN 2010105258539 A CN2010105258539 A CN 2010105258539A CN 201010525853 A CN201010525853 A CN 201010525853A CN 102040258 A CN102040258 A CN 102040258A
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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
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- Y02A20/124—Water desalination
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Abstract
The invention discloses a coproduction method for thermal power generation and distillation sea water desalinization. The method comprises the following steps of: extracting a part of steam from the final stage of a medium-pressure cylinder of a power plant steam turbine; introducing the steam into a base turbine for generating power; after power generation, exhausting the steam; and introducing the steam into a distillation sea water desalinization device and desalinizing sea water by taking the steam as heating steam. The invention also discloses equipment for thermal power generation and distillation sea water desalinization. The equipment comprises the power plant steam turbine, a power plant generator, the base turbine and a base turbine-driven generator, wherein the power plant generator is driven by the power plant steam turbine; the power plant steam turbine is connected with a power plant condenser; the air inlet of the base turbine is connected with the final stage of the medium-pressure cylinder of the power plant steam turbine; and the exhaust port of the base turbine is connected with the distillation sea water desalinization device. The cost of steam supplied to a distillation desalinization plant can be lowered and water producing cost of sea water desalinization is lowered finally; simultaneously, sea water desalinization scale can be determined as required by adjusting the extracting amount of the steam, and water production yield is not limited by the scale of the steam turbine.
Description
Technical field
The present invention relates to electric water co-production technology field, the method and apparatus of particularly a kind of thermal power generation and distillation seawater desalination coproduction.
Background technology
One, distillation desalination techniques
Sea water desaltination is called sea water desalinization again, just extracts the technology and the process of fresh water from seawater.Press the difference of separation method, desalination technology can be divided into Re Fa and embrane method two big classes again.Embrane method mainly comprises reverse osmosis and electrodialysis; And hot method desalination comprises sun power desalination, cold method, multistage flash evaporation, multi-effect distilling etc.Up to the present, not following tens of kinds more than of the method for desalting seawater that research and development are come out, but real industrial applications also only is confined to several technology few in number such as low temperature multiple-effect distillation, multistage flash evaporation, reverse osmosis.Multistage flash evaporation and low temperature multiple-effect distillation are two kinds of desalination techniqueies commonly used.
For multi-stage flash evaporation technology, raw material seawater is heated earlier, introduce flashing chamber then and carry out flash distillation, the pressure-controlling of flashing chamber is depressed at the saturation steam that is lower than charging seawater temperature correspondence, after hot sea water enters flashing chamber because overheated and partial gasification rapidly, thereby the hot sea water temperature is reduced, be fresh water behind the vapor condensation of generation.Hot face and generating surface separately make that like this fouling on the heat-transfer surface reduces in the multistage flash evaporation process, and the accumulation of dirt layer is slow.
Multi-effect distilling is to grow up on the basis of single effect distillation, is multiple-effect evaporation again.The low temperature multiple-effect distillation technology has appearred in the seventies in last century, has overcome early stage multi-effect distilling scale problems, makes multi-effect distilling recover dominant position in the sea water desaltination field, has become a kind of desalination techniques that has development prospect at present.For multiple-effect distillation device, seawater is after the condenser preheating, be distributed on each heat-transfer pipe of imitating, the latent heat of steam in the absorption tube and evaporating, steam is condensed into fresh water in the pipe, and the secondary steam that the outer evaporation of pipe obtains enters next and imitates heat-transfer pipe and be condensed, concentrated seawater then is discharged from, the vaporization temperature that imitate back one all is lower than last effect, and therefore a certain amount of steam input obtains being multiple times than the distilled water of input quantity of steam by repeatedly evaporation and condensation.
Two, thermal power generating technology
Thermal power plant is called for short in the fuel-burning power plant, be to utilize coal, oil, Sweet natural gas to act as a fuel to produce the factory of electric energy, its basic process of production is: fuel burns in boiler and adds hot water and make into steam, the chemical energy of fuel is transformed into heat energy, the rotation of vapor pressure pushing turbine, thermal power transfer becomes mechanical energy, and steam turbine drives the generator rotation then, and mechanical energy is transformed into electric energy.
Steam turbine is one of fuel-burning power plant major equipment, and it accepts the steam that boiler is sent here, is mechanical energy with the thermal power transfer of steam, drives generator for electricity generation.Thermodynamic system of steam tur is that the thermodynamic cycle of steam turbine and hot merit dress are got in return with all devices proceeded and the combination of system.Thermodynamic system of steam tur mainly is main steam and reheating steam system, condensed water and water supply heat back system, condensing system, and auxilliary mutually with it also have draining system, axle envelope vapour system and circulating water system etc.The therrmodynamic system of steam turbine is made up of equipment such as steam-pipe, condensed water and feedwater piping and the well heater that is attached thereto, water pump, valves.
Three, electric water co-production technology
The coproduction of electricity water mainly is meant sea water desaltination power and water power coproduction alliance.Cost of seawater desalination depends on the electric power of consumption and the cost of steam to a great extent, and electric water coproduction can utilize the steam of power plant and electric power to provide power for sea water desalinating plant, thereby realizes the high efficiency of energy utilization and reduce the sea water desaltination cost.Most of large-scale desalimtor all build in together with the power station, and this is the main construction mode of current large-scale sea water desaltination engineering.
Steam turbine of thermal power plant and desalination by distillation device are combined with following dual mode:
One) utilize the latent heat that extracts steam from steam turbine, carry out sea water desaltination as the thermal source of desalinating, this combination is produced a certain amount of desalination water and is supplied with boiler and other parts uses of power plant based on generating.Can carry out Load Regulation, be suitable for for electricity consumption and the bigger situation of water fluctuation.
Two) high pressure steam is used for generating, and the low-pressure steam of discharge is used for desalination, and this method is fit to scale operation fresh water.Be characterized in the efficiency of utilization height, the steam of discharge all is used for sea water desaltination, and the cost of desalination is very low, and this method is suitable for continuous electricity consumption, the smaller occasion of load variations most, and shortcoming is the purpose that can not reach mutual adjusting.
Four, the defective of large thermal power plant steam turbine and desalination by distillation device combination technology
For improving thermal power generation efficient, adopt Generator Set to become the development trend in newly-built fuel-burning power plant.Generator Set requires higher relatively to operation stability, the steam cycle amount is relatively large, and the quantity of steam that enters the condenser condensation is also bigger, and pressure is lower, and one situation should not be desalinated this part steam as thermal source.The Generator Set turbine low pressure cylinder is compact to design, is difficult to extract out a large amount of steam.One situation, adopting the draw gas mode of final stage of intermediate pressure cylinder is distillation sea water desalting factory steam supply.
But there is defective in above-mentioned steam supply way, should not extract steaminess out, and rate of air sucked in required is crossed senior general's remarkably influenced power plant generating efficiency.Therefore the suitable steam supply way of this kind steam supply way as small-sized distillation sea water desalting factory.
Intermediate pressure cylinder final stage for large-scale thermal power machine group steam turbine is drawn gas, and one is 0.5～1.0MPa for its pressure, and one is 300～400 ℃ for a temperature, and its enthalpy has certain generating potential apparently higher than the enthalpy of intending entering condenser steam.Supply with desalimtor if extract a large amount of these grade steam out from steam turbine, then this part steam can not do work in steam turbine, thus the remarkably influenced generating.
Summary of the invention
The present invention provides a kind of making the water cost and making the method and apparatus of adjustable thermal power generation of the water yield and distillation seawater desalination coproduction of sea water desaltination of reducing for solving the technical problem that exists in the known technology.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the method for a kind of thermal power generation and distillation seawater desalination coproduction, extract part steam out from power station Steam Turbine Through IP Admission final stage, at first enter the base turbine generating, distribute the electricity back and discharge, enter the distillation sea water desalting device and carry out sea water desaltination as heating steam.
Another technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the equipment of a kind of thermal power generation and distillation seawater desalination coproduction, the power station generator that comprises power station steam turbine and driving thereof, described power station steam turbine links to each other with condenser of power plant, this equipment also comprises the generator of base turbine and driving thereof, the inlet mouth of described base turbine links to each other with the intermediate pressure cylinder final stage of described power station steam turbine, and the venting port of described base turbine links to each other with the distillation sea water desalting device.
Described base turbine is one, and the venting port of described base turbine links to each other with at least two distillation sea water desalting devices in parallel.
Described base turbine comprises at least two that are arranged in parallel, and every base turbine connects a distillation sea water desalting device.
Advantage and positively effect that the present invention has are: utilize the steam-electric power than higher-grade of extracting out from steam turbine, replenish because the power station power supply capacity that causes of drawing gas descends, thereby reduce the cost be supplied to desalination by distillation factory steam, that finally reduces sea water desaltination makes the water cost; Simultaneously, can determine the scale of sea water desaltination as required, realize, make the restriction that the water yield is not subjected to the steam turbine scale by adjusting steam extraction amount.
Description of drawings
Fig. 1 is the synoptic diagram of thermal power generation of the present invention and distillation seawater desalination cogeneration facility;
Fig. 2 is that thermal power generation of the present invention and distillation seawater desalination cogeneration facility adopt many distillation sea water desalting schematic representation of apparatus of a base turbine service;
Fig. 3 is that thermal power generation of the present invention and distillation seawater desalination cogeneration facility adopt distillation sea water desalting schematic representation of apparatus of a base turbine service.
Among the figure: 1, condenser of power plant, 2, the power station steam turbine, 3, base turbine, 4, the distillation sea water desalting device, 5, the power station generator, 6, generator.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, the equipment of a kind of thermal power generation and distillation seawater desalination coproduction, comprise power station steam turbine 2 and the power station generator 5 that drives thereof, power station steam turbine 2 links to each other with condenser of power plant 1, this equipment also comprises base turbine 3 and the generator 6 that drives thereof, the inlet mouth of base turbine 3 links to each other with the intermediate pressure cylinder final stage of power station steam turbine 2, and the venting port of base turbine 3 links to each other with distillation sea water desalting device 4.
The method of a kind of thermal power generation and distillation seawater desalination coproduction, base turbine 3 are drawn gas from the intermediate pressure cylinder final stage of power station steam turbine 2 and are used for generating, and the low-pressure steam that base turbine 3 is discharged is used for the distillation sea water desalting device and carries out sea water desaltination.
The present invention mainly contains two kinds of embodiments, is respectively many distillation sea water desalting devices in parallel of base turbine service and distillation sea water desalting device of a base turbine service.
See also Fig. 2, the present invention adopts many distillation sea water desalting devices in parallel of a base turbine service, final stage in the intermediate pressure cylinder of power station steam turbine 2 is provided with a bleeding point, and the steam of extraction enters base turbine 3 and drives 6 generatings of base turbine generator.The steam that base turbine 3 is discharged arrives each distillation sea water desalting device 4 by pipe-line transportation.Because take to concentrate steam supply way, the venting port of base turbine 3 has certain distance to each distillation sea water desalting device 4 inlet mouths, need consider the influence of fed distance to system design, mainly contains two aspects.At first need to fully take into account the decline of steam temperature and pressure in course of conveying; Will consider that in addition promptly low temperature and low pressure steam need use larger-diameter pipe-line transportation to the delivery of steam investment, construction investment is bigger, for reducing construction investment, can suitably select the exhaust temperature pressure of higher base turbine 3 for use, to reduce caliber, saves investment.
See also Fig. 3, the present invention adopts distillation sea water desalting device of a base turbine service, final stage in the intermediate pressure cylinder of power station steam turbine 2 is provided with a bleeding point, and the steam of extraction enters the base turbine 3 of a plurality of parallel connections, and each base turbine 3 drives 6 generatings of a generator.The steam that each base turbine 3 is discharged enters a distillation sea water desalting device 4 corresponding with it.For this kind embodiment, base turbine 3 and distillation sea water desalting device 4 are corresponding one by one, directly or by short tube link to each other, and do not have the delivery of steam thermosteresis substantially.The steam that power station steam turbine 2 is discharged enters the base turbine 3 of a plurality of parallel connections, and the vapor pressure of conveying is higher, and the caliber that need select for use is less, and construction investment is lower.
In sum, extract part steam out, at first enter base turbine 3 generatings from power station steam turbine 2.The electric power that base turbine 3 sends replenishes the power generation capacity decline that power station steam turbine 2 steam supplies cause.Steam distributes the electricity back and discharges in base turbine 3, enter distillation sea water desalting device 4 and carry out sea water desaltination as heating steam.Condenser of power plant 1 links to each other with power plant steam turbine 2, is used to the low temperature and low pressure steam of power plant steam turbine 2 discharges that condenses.
The steam inlet condition of base turbine 3 should adapt with the steam parameter that power station steam turbine 2 provides, and the steam discharge parameter should adapt with the demand of distillation sea water desalting device 4.For the low temperature multiple-effect distillation sea water desalting device, the steam that needs is about 70 ℃ of saturation steams; For multistage flash evaporation sea water desalinating plant also, the steam that needs is about 120 ℃ of saturation steams.The steam discharge parameter of base turbine 3 should be taken into account the thermosteresis in the delivery of steam process, should be a little more than the design steam inlet condition of distillation sea water desalting device 4.
Although in conjunction with the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (4)
1. the method for thermal power generation and distillation seawater desalination coproduction, it is characterized in that, extract part steam out, at first enter the base turbine generating from power station Steam Turbine Through IP Admission final stage, distribute the electricity back and discharge, enter the distillation sea water desalting device and carry out sea water desaltination as heating steam.
2. the equipment of thermal power generation and distillation seawater desalination coproduction, it is characterized in that, the power station generator that comprises power station steam turbine and driving thereof, described power station steam turbine links to each other with condenser of power plant, this equipment also comprises the generator of base turbine and driving thereof, the inlet mouth of described base turbine links to each other with the intermediate pressure cylinder final stage of described power station steam turbine, and the venting port of described base turbine links to each other with the distillation sea water desalting device.
3. the equipment of thermal power generation according to claim 2 and distillation seawater desalination coproduction is characterized in that, described base turbine is one, and the venting port of described base turbine links to each other with at least two distillation sea water desalting devices in parallel.
4. the equipment of thermal power generation according to claim 2 and distillation seawater desalination coproduction is characterized in that, described base turbine comprises at least two that are arranged in parallel, and every base turbine connects a distillation sea water desalting device.
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| CN2010105258539A CN102040258A (en) | 2010-10-29 | 2010-10-29 | Coproduction method and equipment for thermal power generation and distillation sea water desalinization |
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| CN2010105258539A CN102040258A (en) | 2010-10-29 | 2010-10-29 | Coproduction method and equipment for thermal power generation and distillation sea water desalinization |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583857A (en) * | 2012-02-07 | 2012-07-18 | 绍兴文理学院 | Electrical fresh water co-production device for coastal thermal power plant and island thermal power plant |
| CN104071748A (en) * | 2014-01-04 | 2014-10-01 | 刘慧祥 | Matter energy transformation station |
| CN104951904A (en) * | 2015-07-15 | 2015-09-30 | 中国神华能源股份有限公司 | Water network monitoring system and method for power plant |
| CN110143630A (en) * | 2019-05-23 | 2019-08-20 | 首钢京唐钢铁联合有限责任公司 | Water and electricity cogeneration system |
| CN112562879A (en) * | 2020-12-03 | 2021-03-26 | 东北大学 | Energy cascade utilization multi-element energy supply system based on nuclear energy |
| US11502322B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11502323B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11855324B1 (en) | 2022-11-15 | 2023-12-26 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell with heat pump |
| US12040517B2 (en) | 2022-11-15 | 2024-07-16 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell and methods of use thereof |
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| US20040237526A1 (en) * | 2003-05-27 | 2004-12-02 | Strobl William Charles | L & N cycle for hydrogen, electricity, & desalinated seawater |
| CN101157486A (en) * | 2006-10-02 | 2008-04-09 | 乔治洛德方法研究和开发液化空气有限公司 | Method and plant for the combined production of electricity, steam and desalinated water |
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| CN1295979A (en) * | 2000-03-31 | 2001-05-23 | 何敬东 | Implement for sea water desalination utilizing waste heat of electricity generating plant |
| US20040237526A1 (en) * | 2003-05-27 | 2004-12-02 | Strobl William Charles | L & N cycle for hydrogen, electricity, & desalinated seawater |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583857A (en) * | 2012-02-07 | 2012-07-18 | 绍兴文理学院 | Electrical fresh water co-production device for coastal thermal power plant and island thermal power plant |
| CN104071748A (en) * | 2014-01-04 | 2014-10-01 | 刘慧祥 | Matter energy transformation station |
| CN104951904A (en) * | 2015-07-15 | 2015-09-30 | 中国神华能源股份有限公司 | Water network monitoring system and method for power plant |
| CN110143630A (en) * | 2019-05-23 | 2019-08-20 | 首钢京唐钢铁联合有限责任公司 | Water and electricity cogeneration system |
| CN112562879A (en) * | 2020-12-03 | 2021-03-26 | 东北大学 | Energy cascade utilization multi-element energy supply system based on nuclear energy |
| CN112562879B (en) * | 2020-12-03 | 2024-05-14 | 东北大学 | Energy cascade utilization multi-element energy supply system based on nuclear energy |
| US11502323B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11563229B1 (en) | 2022-05-09 | 2023-01-24 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11611099B1 (en) | 2022-05-09 | 2023-03-21 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11699803B1 (en) | 2022-05-09 | 2023-07-11 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11502322B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11855324B1 (en) | 2022-11-15 | 2023-12-26 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell with heat pump |
| US12040517B2 (en) | 2022-11-15 | 2024-07-16 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell and methods of use thereof |
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Application publication date: 20110504 |