CN102372329A - Multistage seawater desalting application system - Google Patents
Multistage seawater desalting application system Download PDFInfo
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- CN102372329A CN102372329A CN2010102634041A CN201010263404A CN102372329A CN 102372329 A CN102372329 A CN 102372329A CN 2010102634041 A CN2010102634041 A CN 2010102634041A CN 201010263404 A CN201010263404 A CN 201010263404A CN 102372329 A CN102372329 A CN 102372329A
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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Abstract
The invention provides a multistage seawater desalting application system, which comprises an exhaust steam generation device, a plurality of seawater desalting units and a plurality of temperature rise compression devices, wherein the seawater desalting units and the temperature rise compression devices are in one-to-one correspondence, placed at intervals and mutually connected; the exhaust steam generation device is connected with one temperature rise compression device; the temperature rise compression devices comprise a condenser, a vacuum pump, an overheater and a compressor; the condenser is filled with head-conducting liquid; the vacuum pump is connected with the condenser; the overheater is connected with the condenser; and the compressor is connected with the overheater. The temperature rise compression devices are additionally arranged in the multistage seawater desalting application system disclosed by the invention, so that the utilization efficiency of a heat source is improved while multistage seawater desalting is carried out.
Description
Technical field
The invention belongs to the heating power transmission field, be meant a kind of multistage sea water desaltination application system especially.
Background technology
The appearance of turbine has promoted development of electric power industry, and to 20 beginnings of the century, the power station steam turbine single-machine capacity has reached 10 megawatts.Increasingly extensive along with Electric Application; Some metropolitan power station peakloads of the U.S. the twenties near 1000 megawatts; If single-machine capacity has only 10 megawatts; Then need install nearly hundred, so single-machine capacity just increases to 60 megawatts during the twenties, has occurred the turbine of 165 megawatts and 208 megawatts the beginning of the thirties again.After this break out during economic recession and the World War II, make the increase of the turbine single-machine capacity state that seizes up.The fifties, along with the post-war economic development, electricity needs is advanced by leaps and bounds, and single-machine capacity begins continuous increase again, has occurred the large-size steam turbine of 325～600 megawatts successively; 1000 megawatt turbine have been processed the sixties; The seventies, 1300 megawatt turbine have been processed.Present many countries single-machine capacity commonly used is 300～600 megawatts.
Turbine is the external combustion rotary machine that can steam thermal energy be converted into mechanical work, behind the steam entering turbine from boiler, passes through the nozzle and the movable vane of a series of loop configurations successively, the heat energy of steam is converted into the mechanical energy of turbine rotor rotation.Steam carries out energy transformation by different way in turbine, just constituted the turbine of different operating principle.The exhaust steam pressure of turbine is low more, and the thermo-efficiency of steam cycle is just high more.But exhaust steam pressure mainly depends on the vacuum tightness of condenser; Vacuum tightness depends on the temperature and the vacuumizing device of water coolant again; If adopted low exhaust steam pressure; With regard to the heat-transfer surface that needs to increase cooling water flow, increase condenser cooling water and heat-eliminating medium, temperature and the vacuumizing device that reduces the water coolant that is used, than long last stage blade, but the too low steam flow rate of steam turbine (LP cylinder) that can cause again of vacuum is accelerated simultaneously; Make steam turbine (LP cylinder) differential expansion aggravation, jeopardize the turbine safe handling.In order to make the heat energy of discharging to be used; And don't as for too much reduction thermo-efficiency, general turbine is to discharge 60 ℃ of water vapour up and down, and the sensible heat that near the water vapour this temperature wherein can be utilized is few; Though wherein comprise a large amount of latent heat; But because latent heat is difficult to be utilized, therefore, the utilising efficiency of the water vapour of the low-temperature heat source that turbine is discharged is lower always.
Desalting plant, seawater is very high owing to its saltiness, and can not directly be used, and two kinds of methods of main at present employing desalinize seawater, i.e. distillation method and reverse osmosis method.Distillation method mainly is used to the place that super-huge sea water desaltination is handled upward and heat energy enriches.Very wide of reverse osmosis membrane applicable surface, and ratio of desalinization is very high, therefore is widely used.Reverse osmosis membrane at first is that seawater is extracted up, carries out rough handling, reduces turbidity of sea water; Prevent microbial growths such as bacterium, algae, use extraordinary HPP supercharging then, make seawater get into reverse osmosis membrane; Because the seawater saltiness is high, so seawater reverse osmosis membrane must have the high desalination rate, characteristics such as corrosion-resistant, high pressure resistant, antipollution; Through the seawater after the reverse osmosis membrane processing, its saltiness reduces greatly, and TDS content is reduced to about 200 mg/litre from 36000 mg/litre.Water quality after the desalination even be superior to tap water so just can supply industry, commerce, resident and boats and ships, naval vessels to use.In the prior art, the exhaust steam that turbine is discharged is used on the sea water desaltination unit, through behind the sea water desaltination unit of one-level; The sensible heat of exhaust steam is obviously consumed; Follow-up sea water desaltination DeGrain, and after should using up just is discharged from and abandons; Waste the energy greatly, reduced the service efficiency of the energy.
Summary of the invention
The object of the present invention is to provide a kind of multistage sea water desaltination application system, solve the low excessively problem of discharge exhaust steam service efficiency that exists in the prior art.
To achieve these goals, the invention provides a kind of multistage sea water desaltination application system, comprising: the exhaust steam generation device; A plurality of sea water desaltination units and a plurality of intensification compression set; Said sea water desaltination unit and said intensification compression set are corresponding one by one; Place and interconnect at interval; Said exhaust steam generation device links to each other with a said intensification compression set, and said intensification compression set comprises: condensing surface is provided with heat-conducting liquid in the said condensing surface; Vacuum pump links to each other with said condensing surface; Suphtr links to each other with said condensing surface; Compressor links to each other with said suphtr.
Optional, said exhaust steam generation device is a turbine.
Optional, said vacuum pump is a steam jet vacuum pump.
Optional, said seawater desalination machine is combined as three.
Optional, said multistage sea water desaltination application system comprises: the exhaust steam generation device; The first intensification compression set, the second intensification compression set and the 3rd intensification compression set, the said first intensification compression set links to each other with said exhaust steam generation device; The first sea water desaltination unit; The second sea water desaltination unit and the 3rd sea water desaltination unit; The inlet of the wherein said first sea water desaltination unit links to each other with the said first intensification compression set, and outlet links to each other with the said second intensification compression set, and the inlet of the said second sea water desaltination unit links to each other with said second heat riser; Outlet links to each other with said the 3rd intensification compression set, and the inlet of said the 3rd sea water desaltination unit links to each other with said the 3rd intensification compression set.
Owing to adopted technique scheme; Compared with prior art; The present invention has the following advantages: the multistage sea water desaltination application system of the present invention is owing to all added an intensification compression set in every grade of sea water desaltination unit; Thereby can realize that multistage sea water desaltination works together,, improve the service efficiency of thermal source with less energy consumption.
Description of drawings
Fig. 1 is the structural representation of multistage sea water desaltination application system one embodiment of the present invention.
Fig. 2 is the structural representation of the intensification compression set of the multistage sea water desaltination application system of the present invention.
Embodiment
Do detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
A kind of multistage sea water desaltination application system provided by the invention comprises: the exhaust steam generation device, and said exhaust steam generation device is a turbine; A plurality of sea water desaltination units and a plurality of intensification compression set; Said sea water desaltination unit and said intensification compression set are corresponding one by one; Place and interconnect at interval; Said exhaust steam generation device links to each other with a said intensification compression set, and said intensification compression set comprises: condensing surface is provided with heat-conducting liquid in the said condensing surface; Vacuum pump links to each other with said condensing surface, and said vacuum pump is a steam jet vacuum pump; Suphtr links to each other with said condensing surface; Compressor links to each other with said suphtr.
Below; Please refer to one embodiment of the invention; Said seawater desalination machine combination is set at three, please refer to Fig. 1, Fig. 1 is the structural representation of multistage sea water desaltination application system one embodiment of the present invention; Said multistage sea water desaltination application system comprises: exhaust steam generation device 10, and this exhaust steam generation device 10 is a turbine; The first intensification compression set 11, the second intensification compression set 12 and the 3rd intensification compression set 13, the said first intensification compression set 11 links to each other with said exhaust steam generation device 10; The first sea water desaltination unit 21; The second sea water desaltination unit 22 and the 3rd sea water desaltination unit 23; The inlet of the wherein said first sea water desaltination unit 21 links to each other with the said first intensification compression set 11, and outlet links to each other with the said second intensification compression set 12, and the inlet of the said second sea water desaltination unit 22 links to each other with said second heat riser 12; Outlet links to each other with said the 3rd intensification compression set 13, and the inlet of said the 3rd sea water desaltination unit 23 links to each other with said the 3rd intensification compression set 13.
Then, please refer to Fig. 2, Fig. 2 is the structural representation of the intensification compression set of the multistage sea water desaltination application system of the present invention, and A, B, C, D, E are device code among the figure, 1,2 ... 10 is the fluid code.The device in warm source comprised during low-temperature heat source changed into: condensing surface is provided with heat-conducting liquid in the said condensing surface; Vacuum pump links to each other with said condensing surface; Suphtr links to each other with said condensing surface; Compressor links to each other with said suphtr.A is a condensing surface, and condensation is carried out in the exhaust steam 1 of power generation system turbine, and phlegma 2 is got back to power generation system; B is a suphtr, and it is overheated that 3 water vapour 4 through condensing surface A heating acquisition are carried out, and obtains supersaturated vapor 5; C is a compressor, and superheated vapour 5 is compressed, and improves its grade and becomes 6; D is the steam injector pump, keeps the vacuum tightness of condensing surface A demand; E is a water cooler, and the compressed vapour of steam jet vacuum pump is carried out condensation.1-2:1 is the exhaust steam of power generation system through the turbine outlet, in condensing surface, is condensed into liquid 2; 3-6:3 is the liquid water that condensing surface is supplied with; 3 obtain the energy of power generation system exhaust steam 1, undergo phase transition gaseous state 4,4 and carry out overheatedly through suphtr B, obtain the effects of superheated vapour 5,5 through compressor C, and the steam 6,6 that becomes higher quality can be used as thermal source utilization; 7-10: the steam 8 of about 0.5MPa draws the fluid 7 in the condensing surface A as the working fluid of steam jet vacuum pump, thereby keeps the vacuum tightness in the condensing surface, obtains compressed fluid 9 simultaneously, and compressed fluid 9 cools off and becomes liquid 10.The steam jet vacuum pump major parts is an injector; It is made up of nozzle suction chamber and diffuser-three parts, and the work of injector is divided into three phases: 1. adiabatic compression stage, the i.e. process of working steam through nozzle adiabatic expansion (isentropic expansion)-pressure can (potential energy) be converted into speed (kinetic energy); To penetrate at a high speed; Pressure is reduced to P1 by P, and enthalpy descends, and speed V increases severely to V1 (supersonic velocity); 2. mix stages, working steam mix-two strands of air-flows with the stream of being bled and carry out energy exchange at mixing section, the speed of the stream of being bled is increased to Vs by Vz, and working air current is carrying to be bled and flowing into diffuser-; 3. compression stage; Be that gas and steam are proceeded energy exchange on one side in the diffuser-, on one side pressure also rise to P3 by P2, reduce to V4 (subsonic velocity) through expansion section speed again; Pressure further rises to P4 by P3, thereby pumped gas is discharged (exhaust pressure is greater than normal atmosphere).Because working steam pressure is higher, can cause expand increasing, nozzle length increases, and causes that nozzle loss increases, equipment cost and working cost increase, and the effect of bleeding does not have obvious variation, so the pressure of working steam is generally 0.4 to 1.6Mpa.
In actual use, the pressure of the suphtr B among Fig. 2 is about 20kpa, is 60 ℃ in the temperature of the low-temperature heat source of suphtr inlet; After overheated, temperature becomes 70 ℃, remains unchanged before and after the pressure; Enthalpy becomes 729.69kw.h from 724.91kw.h, and thermal load is 4.78kw.h; 70 ℃ low-temperature heat source is through after the compressor C, become 85.9 ℃ in warm source, pressure becomes 25kpa by 19.93kpa, thermal load is 10.11kw.h.The total energy that drops into, promptly above-mentioned thermal load sum is 14.89kw.h, and total latent heat capable of using is 632.32kw.h, and net value is 617.43kw.h, and input-output ratio is 42.46 times.After promptly finishing dealing with through the intensification compression set, the input-output ratio of heat reaches more than 40 times, has improved the service efficiency of heat energy greatly.
Though the present invention discloses as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art are not breaking away from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (5)
1. a multistage sea water desaltination application system is characterized in that, comprising:
The exhaust steam generation device;
A plurality of sea water desaltination units and a plurality of intensification compression set; Said sea water desaltination unit and said intensification compression set are corresponding one by one; Place and interconnect at interval, said exhaust steam generation device links to each other with a said intensification compression set, and said intensification compression set comprises:
Condensing surface is provided with heat-conducting liquid in the said condensing surface;
Vacuum pump links to each other with said condensing surface;
Suphtr links to each other with said condensing surface;
Compressor links to each other with said suphtr.
2. multistage sea water desaltination application system according to claim 1 is characterized in that: said exhaust steam generation device is a turbine.
3. multistage sea water desaltination application system according to claim 1 is characterized in that: said vacuum pump is a steam jet vacuum pump.
4. multistage sea water desaltination application system according to claim 1 is characterized in that: said seawater desalination machine is combined as three.
5. multistage sea water desaltination application system according to claim 4 is characterized in that: said multistage sea water desaltination application system comprises: the exhaust steam generation device; The first intensification compression set, the second intensification compression set and the 3rd intensification compression set, the said first intensification compression set links to each other with said exhaust steam generation device; The first sea water desaltination unit; The second sea water desaltination unit and the 3rd sea water desaltination unit; The inlet of the wherein said first sea water desaltination unit links to each other with the said first intensification compression set, and outlet links to each other with the said second intensification compression set, and the inlet of the said second sea water desaltination unit links to each other with said second heat riser; Outlet links to each other with said the 3rd intensification compression set, and the inlet of said the 3rd sea water desaltination unit links to each other with said the 3rd intensification compression set.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102634041A CN102372329A (en) | 2010-08-25 | 2010-08-25 | Multistage seawater desalting application system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102634041A CN102372329A (en) | 2010-08-25 | 2010-08-25 | Multistage seawater desalting application system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806964A (en) * | 2012-11-06 | 2014-05-21 | 蓝瑚科技有限公司 | Method and system for comprehensively utilizing steam turbine dead steam latent heat |
| WO2023176077A1 (en) * | 2022-03-15 | 2023-09-21 | 株式会社日立製作所 | Steam generation device and steam generation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1891981A (en) * | 2005-07-04 | 2007-01-10 | 陈培豪 | Thermodynamic cycle and device |
| JP2007064047A (en) * | 2005-08-30 | 2007-03-15 | Hitachi Eng Co Ltd | Waste heat recovery facility for steam turbine plant |
| CN101130442A (en) * | 2006-08-25 | 2008-02-27 | 葆光（大连）节能技术研究所有限公司 | Method for desalinating sea water by using seawater source heat pump technology |
-
2010
- 2010-08-25 CN CN2010102634041A patent/CN102372329A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1891981A (en) * | 2005-07-04 | 2007-01-10 | 陈培豪 | Thermodynamic cycle and device |
| JP2007064047A (en) * | 2005-08-30 | 2007-03-15 | Hitachi Eng Co Ltd | Waste heat recovery facility for steam turbine plant |
| CN101130442A (en) * | 2006-08-25 | 2008-02-27 | 葆光（大连）节能技术研究所有限公司 | Method for desalinating sea water by using seawater source heat pump technology |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806964A (en) * | 2012-11-06 | 2014-05-21 | 蓝瑚科技有限公司 | Method and system for comprehensively utilizing steam turbine dead steam latent heat |
| WO2023176077A1 (en) * | 2022-03-15 | 2023-09-21 | 株式会社日立製作所 | Steam generation device and steam generation method |
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Application publication date: 20120314 |