CN108706668A - A kind of seawater desalination system of multi-mode heating vapour source - Google Patents
A kind of seawater desalination system of multi-mode heating vapour source Download PDFInfo
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- CN108706668A CN108706668A CN201810699637.2A CN201810699637A CN108706668A CN 108706668 A CN108706668 A CN 108706668A CN 201810699637 A CN201810699637 A CN 201810699637A CN 108706668 A CN108706668 A CN 108706668A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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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- 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
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The invention discloses belong to carry out a kind of seawater desalination system of multi-mode heating vapour source involved by the technical field of sea water desalination, including generating set, low-temperature multi-effect evaporator, the light TVC valves in sea and ancillary equipment using extracted steam from turbine.This system is combined using low temperature multiple-effect distillation device with heat power generating system, sea water desalination is carried out in different modes, it is utilized respectively the higher steam turbine mesolow cylinder communicating pipe steam extraction of parameter, the lower low pressure (LP) cylinder steam extraction of parameter and low pressure (LP) cylinder steam exhaust heat steam as seawater desalination system, a kind of seawater desalination system of multi-mode heating vapour source provided by the invention, by the suitable steam turbine of selection parameter seawater desalination system is driven come vapour, realize the cooperation of high low parameter steam, while considering generating set operating status, the production freshwater resources of low cost, the efficient utilization of energy quality can be realized to greatest extent, water-electricity cogeneration energy-saving effect and remarkable in economical benefits.
Description
Technical field
The invention belongs to steam turbine technology and field of sea water desalting technology, more particularly to a kind of sea of multi-mode heating vapour source
Water desalination system.
Background technology
Since the 1950s, with the appearance of shortage of fresh water phenomenon, desalination technology has obtained quickly
Development and application, have become solve water resources crisis one of important channel.Sea water desalination is a kind of utilization energy acquisition
The technology of freshwater resources, according to the difference of desalination process energy form, sea water desalination can be divided into consume the multistage based on thermal energy
Flash distillation and the hot law technology of multi-effect distilling and to consume the reverse osmosis membrane law technology based on electric energy.Wherein low-temperature multiple-effect distillation is
One of most energy-efficient method in desalination technology, developed recently is rapid, and the scale of device is growing.
Currently, the steam pressure that domestic low temperature multiple-effect distillation sea water desalting device uses generally exists
Between, temperature existsBetween, this some vapor into desalination plant after pressure and temperature reducing by being used as heating
Vapour source.However, low-temperature multiple-effect distillation is used as the light heating vapour source in sea using the extracted steam from turbine of higher quality, seawater can be caused light
Change actual motion high expensive, constrains engineer application, marketing and the market competitiveness significantly.
Prior art the problem of not only there is high-grade energy losses during pressure and temperature reducing, but also use single pumping
Vapour as the light heating vapour source in sea without the reasonable distribution of realization energy to greatest extent, what desalination plant was combined with power plant steam extraction
There are the energy saving space, the economic benefit of water-electricity cogeneration is not apparent enough for part.A kind of steamer disclosed in patent No. CN105110400A
The therrmodynamic system of machine steam exhaust latent heat comprehensive utilization realizes that low pressure steam exhaust recycles with injector, while utilizing condenser steam discharge
Latent heat resource effectively reduces the operating cost of seawater desalination system.And there are pure in generating set actual moving process
Solidifying and two kinds of operating conditions of high back pressure, the seawater desalination system energy-saving potential of single steam extraction pattern is poor under different operating conditions,
And the seawater desalination system of multi-mode heating vapour source is used to be coupled with steam turbine, and it can realize level-density parameter, cascade utilization,
The seawater desalination system of this multi-mode heating vapour source has the energy-saving potential and economic benefit of bigger.
In conclusion the suitable steam turbine of selection parameter of the present invention carrys out vapour as the light heating vapour source in sea, seawater can be reduced
The operating cost of desalination improves the Wat er benefit processed of low-temperature multiple-effect distillation；Meanwhile realizing adding for low-temperature multi-effect seawater desalination device
The mutual cooperation of hot vapour source and generating set operational mode can realize the efficient utilization of energy quality to greatest extent.
Invention content
The object of the present invention is to provide the seawater desalination system that a kind of multi-mode heats vapour source, which includes mainly：It is high
Cylinder pressure, intermediate pressure cylinder, low pressure (LP) cylinder, the light TVC valves in sea, the first low-temperature multi-effect evaporator, the second low-temperature multi-effect evaporator, third low temperature are more
Imitate evaporator, the 4th low-temperature multi-effect evaporator, the light condenser of the 5th low-temperature multi-effect evaporator and sea；It is characterized in that, the height
Cylinder pressure 1, intermediate pressure cylinder 2, low pressure (LP) cylinder 4 and generator 5 are sequentially connected；First low-temperature multi-effect evaporator 12, the evaporation of the second low-temperature multi-effect
Device 13, third low-temperature multi-effect evaporator 14, the 4th low-temperature multi-effect evaporator 15, the light condensing of the 5th low-temperature multi-effect evaporator 16 and sea
Device 17 is sequentially connected；The seawer outlet of extra large light condenser 17 is connected to each low-temperature multi-effect evaporator by seawater transportation water pump 18
Seawater inlet；Middle pressure, 3 steam extraction end of low pressure (LP) cylinder communicating pipe pass through the first control valve 8 and the first spray desuperheating device 9 and the light TVC in sea
Valve 10 is connected to；The steam (vapor) outlet of second low-temperature multi-effect evaporator 13, the light outlet of TVC valves 10 in sea pass through the second spray desuperheating device 11
It is connect with the first low-temperature multi-effect evaporator 12；4 extraction opening of low pressure (LP) cylinder by the second control valve 7 and the second spray desuperheating device 11 with
First low-temperature multi-effect evaporator 12 connects；The low vacuum steam exhaust outlet of low pressure (LP) cylinder 4 passes through third control valve 6 and the second spray desuperheating
Device 11 is connect with the first low-temperature multi-effect evaporator 12.
The multi-mode heating vapour source of the seawater desalination system is by the first control valve 8, the second control valve 7 and third control
The control of valve 6 processed, can in the first pattern, second mode, the third mode and fourth mode operation；
The first mode is that the first control valve 8 is opened, and the second control valve 7 and third control valve 6 are closed, with middle pressure,
The steam extraction of low pressure (LP) cylinder communicating pipe 3 heats steam as seawater desalination system；
The second mode is opened for the second control valve 7, and the first control valve 8 and third control valve 6 are closed, with low pressure (LP) cylinder
4 steam extraction enters the first low-temperature multi-effect evaporator 12 by the second control valve 7 and the second spray desuperheating device 11, light as seawater
Change system heats steam；
The third mode is the first control valve 8, the unlatching of the second control valve 7, and third control valve 6 is closed；Middle pressure, low pressure
The steam extraction of cylinder communicating pipe 3 enters the light TVC valves 10 in sea and low pressure (LP) cylinder 4 by the first control valve 8 and the first spray desuperheating device 9
Steam extraction enters the light TVC valves 10 in sea by the second control valve 7, is pressed in formation, the steam extraction of the steam extraction of low pressure (LP) cylinder communicating pipe 3 and low pressure (LP) cylinder
It cooperates and heats steam as seawater desalination system；
The fourth mode is opened for third control valve 6, and the first control valve 8 and the second control valve 7 are closed, low pressure (LP) cylinder
Low vacuum steam exhaust enters the first low-temperature multi-effect evaporator 12 by third control valve and the second spray desuperheating device, light as seawater
Change system heats steam.
The middle pressure, low pressure (LP) cylinder communicating pipe (3) extraction pressure are more than 0.3MPa.a.
The second spray desuperheating device (11) exports saturated-steam temperatureSubtract into the second water spray
The steam pressure of warm device (11) is
When the seawater desalination system is run with fourth mode, the low vacuum steam exhaust of low pressure (LP) cylinder 4 is as sea water desalination system
System heating steam, pressure are
Beneficial effects of the present invention are that the present invention is combined using low temperature multiple-effect distillation device with heat power generating system, respectively
Using the higher steam turbine mesolow cylinder communicating pipe steam extraction of parameter, the lower low pressure (LP) cylinder steam extraction of parameter and low pressure (LP) cylinder steam exhaust as sea
Water desalination system heats steam, while being cooperated using mesolow cylinder communicating pipe steam extraction and low pressure (LP) cylinder steam extraction and driving sea water desalination
System.Seawater desalination system is driven come vapour by the suitable steam turbine of selection parameter, the cooperation of high low parameter steam is realized, considers
While generating set operating status, freshwater resources, water-electricity cogeneration energy-saving effect and remarkable in economical benefits are produced at low cost；Most
The efficient utilization of the realization energy quality of limits.
Description of the drawings
Fig. 1 is the seawater desalination system schematic diagram that a kind of multi-mode heats vapour source.
Specific implementation mode
The present invention provides a kind of seawater desalination system of multi-mode heating vapour source, which includes mainly：High pressure cylinder, middle pressure
Cylinder, low pressure (LP) cylinder, the light TVC valves in sea, the first low-temperature multi-effect evaporator, the second low-temperature multi-effect evaporator, third low-temperature multi-effect evaporator,
4th low-temperature multi-effect evaporator, the light condenser of the 5th low-temperature multi-effect evaporator and sea；The present invention is by the first control valve 8,
The control of two control valves 7 and third control valve 6, can in the first pattern, second mode, the third mode and fourth mode operation；
Explain in detail the present invention below in conjunction with the accompanying drawings.
Fig. 1 show a kind of seawater desalination system schematic diagram of multi-mode heating vapour source.In figure, high pressure cylinder 1, intermediate pressure cylinder 2,
Low pressure (LP) cylinder 4 and generator 5 are sequentially connected；First low-temperature multi-effect evaporator 12, the second low-temperature multi-effect evaporator 13, third low temperature are more
Effect evaporator 14, the 4th low-temperature multi-effect evaporator 15, the 5th low-temperature multi-effect evaporator 16 and extra large light condenser 17 are sequentially connected；Sea
The seawer outlet of light condenser 17 is connected to the seawater inlet of each low-temperature multi-effect evaporator by seawater transportation water pump 18；Middle pressure,
Low pressure (LP) cylinder communicating pipe, 3 steam extraction end was connected to by the first control valve 8 and the first spray desuperheating device 9 with extra large light TVC valves 10；Second is low
The steam (vapor) outlet of warm multi-effect evaporator 13, the light outlet of TVC valves 10 in sea pass through the second spray desuperheating device 11 and the first low-temperature multi-effect
Evaporator 12 connects；4 extraction opening of low pressure (LP) cylinder is steamed by the second control valve 7 and the second spray desuperheating device 11 and the first low-temperature multi-effect
Device 12 is sent out to connect；The low vacuum steam exhaust outlet of low pressure (LP) cylinder 4 is low with first by third control valve 6 and the second spray desuperheating device 11
Warm multi-effect evaporator 12 connects.Pressure, 3 extraction pressure of low pressure (LP) cylinder communicating pipe are more than 0.3MPa.a in wherein, the second spray desuperheating fills
Setting 11 outlet saturated-steam temperatures is Steam pressure into the second spray desuperheating device 11 is
When the seawater desalination system is run with fourth mode, the low vacuum steam exhaust of low pressure (LP) cylinder 4 is as sea water desalination system
System heating steam, pressure are
The seawater desalination system of the multi-mode heating vapour source is controlled by the first control valve 8, the second control valve 7 and third
The control of valve 6, can in the first pattern, second mode, the third mode and fourth mode operation.
Work by taking certain 630MW extraction condensing type generating set steam extraction drives 2.5 ten thousand ton day low-temperature multiple-effect seawater desalination techniques as an example
It is as follows to make principle：
First mode is run, and the first control valve 8 is opened, and the second control valve 7 and third control valve 6 are closed, in steam turbine
Pressure, the extraction flow of low pressure (LP) cylinder communicating pipe 3 are 70t/h, pressure 0.55MPa.a, by entering after the first Desuperheating device 9 of spraying water
The light TVC valves 10 in sea, extra large light TVC valves 10 are drawn seawater desalination system evaporated vapor, and outlet vapor pressure is 25kPa.a, is passed through
Temperature is reduced to 65 DEG C as seawater desalination system and heats steam after second spray desuperheating device 11.
Second mode is run, and the second control valve 7 is opened, and the first control valve 8 and third control valve 6 are closed, with low pressure (LP) cylinder 4
Extraction flow is 120t/h, and steam extraction enters the first low-temperature multi-effect by the second control valve 7 and the second spray desuperheating device 11 and evaporates
Device 12 heats steam as seawater desalination system.
The third mode is run, and the first control valve 8, the second control valve 7 are opened, and third control valve 6 is closed；Middle pressure, low pressure (LP) cylinder
The extraction flow of communicating pipe 3 is 60t/h, and pressure 0.55MPa.a, 4 extraction flow of low pressure (LP) cylinder is 20t/h, and pressure is
45kPa.a, steam extraction enter the steam extraction of sea light TVC valves 10 and low pressure (LP) cylinder 4 by the first control valve 8 and the first spray desuperheating device 9
Enter the light TVC valves 10 in sea by the second control valve 7, pressure, the steam extraction of low pressure (LP) cylinder communicating pipe 3 and the steam extraction of low pressure (LP) cylinder are mutual in formation
Cooperation heats steam as seawater desalination system.
Fourth mode is run, and when generating set enters high back pressure operational mode, seawater desalination system is run with fourth mode,
Third control valve 6 is opened, and the first control valve 8 and the second control valve 7 are closed, and the low vacuum steam exhaust flow of low pressure (LP) cylinder is 120t/h,
Pressure is 35kPa.a, by entering the first low-temperature multi-effect evaporator after 11 desuperheat of third control valve 6 and the second spray desuperheating device
12, heat steam as seawater desalination system.
Seawater desalination system heating steam becomes after discharging the latent heat of vaporization in 12 heat exchanger tube of the first low-temperature multi-effect evaporator
Condensed water is externally discharged；First low-temperature multi-effect evaporator, 12 heat exchanger tube outer portion Absorption by Sea Water heat generation indirect steam enters
Second low-temperature multi-effect evaporator, 13 steam inlet, the heating steam as the second low-temperature multi-effect evaporator 13；First low-temperature multi-effect
Unevaporated seawater enters the second low-temperature multi-effect from 12 brine outlet of the first low-temperature multi-effect evaporator outside 12 heat exchanger tube of evaporator
13 strong brine entrance of evaporator.
The heating steam of second low-temperature multi-effect evaporator 13 discharges vaporization in 13 heat exchanger tube of the second low-temperature multi-effect evaporator
Become distilled water after latent heat, the distilled water of the second low-temperature multi-effect evaporator 13 goes out from the distilled water of the second low-temperature multi-effect evaporator 13
Mouth enters the distillation water inlet of third low-temperature multi-effect evaporator 14；Second low-temperature multi-effect evaporator, 13 heat exchanger tube outer portion seawater is inhaled
Heat generation indirect steam is received, into 14 steam inlet of third low-temperature multi-effect evaporator, as third low-temperature multi-effect evaporator 14
Heating steam；Unevaporated seawater is from 13 dense salt of the second low-temperature multi-effect evaporator outside second low-temperature multi-effect evaporator, 13 heat exchanger tube
Water out enters 14 strong brine entrance of third low-temperature multi-effect evaporator.
The heating steam of third low-temperature multi-effect evaporator 14 discharges vaporization in 14 heat exchanger tube of third low-temperature multi-effect evaporator
Become distilled water after latent heat, the distilled water of third low-temperature multi-effect evaporator 14 goes out from the distilled water of third low-temperature multi-effect evaporator 14
Mouth enters the distillation water inlet of the 4th low-temperature multi-effect evaporator 15；14 heat exchanger tube outer portion seawater of third low-temperature multi-effect evaporator is inhaled
Heat generation indirect steam is received, into 15 steam inlet of the 4th low-temperature multi-effect evaporator, as the 4th low-temperature multi-effect evaporator 15
Heating steam；Unevaporated seawater is from 14 dense salt of third low-temperature multi-effect evaporator outside 14 heat exchanger tube of third low-temperature multi-effect evaporator
Water out enters 15 strong brine entrance of the 4th low-temperature multi-effect evaporator.
The heating steam of 4th low-temperature multi-effect evaporator 15 discharges vaporization in 15 heat exchanger tube of the 4th low-temperature multi-effect evaporator
Become distilled water after latent heat, the distilled water of the 4th low-temperature multi-effect evaporator 15 goes out from the distilled water of the 4th low-temperature multi-effect evaporator 15
Mouth enters the distillation water inlet of the 5th low-temperature multi-effect evaporator 16；4th low-temperature multi-effect evaporator, 15 heat exchanger tube outer portion seawater is inhaled
Heat generation indirect steam is received, into 16 steam inlet of the 5th low-temperature multi-effect evaporator, as the 5th low-temperature multi-effect evaporator 16
Heating steam；Unevaporated seawater is from 15 dense salt of the 4th low-temperature multi-effect evaporator outside 4th low-temperature multi-effect evaporator, 15 heat exchanger tube
Water out enters 16 strong brine entrance of the 5th low-temperature multi-effect evaporator.
The heating steam of 5th low-temperature multi-effect evaporator 16 discharges vaporization in 16 heat exchanger tube of the 5th low-temperature multi-effect evaporator
Become distilled water after latent heat, 16 heat exchanger tube outer portion Absorption by Sea Water heat generation indirect steam of the 5th low-temperature multi-effect evaporator enters
The light condenser 17 in sea enters the 5th low-temperature multi-effect evaporator 16 and distills water inlet, the distillation of each low-temperature multi-effect evaporator after condensation
Water is pooled to 16 distilled water outlet of the 5th low-temperature multi-effect evaporator and is externally discharged；Outside 5th low-temperature multi-effect evaporator, 16 heat exchanger tube not
The seawater of evaporation goes to 16 brine outlet of the 5th low-temperature multi-effect evaporator, and the strong brine of each low-temperature multi-effect evaporator is pooled to
Five low-temperature multi-effect evaporators, 16 brine outlet is externally discharged.
Claims (5)
1. a kind of seawater desalination system of multi-mode heating vapour source, the system include mainly：It is high pressure cylinder (1), intermediate pressure cylinder (2), low
Cylinder pressure (4), the light TVC valves (10) in sea, the first low-temperature multi-effect evaporator (12), the second low-temperature multi-effect evaporator (13), third low temperature
Multi-effect evaporator (14), the 4th low-temperature multi-effect evaporator (15), the 5th low-temperature multi-effect evaporator (16), the light condenser (17) in sea；
It is characterized in that, the high pressure cylinder (1), intermediate pressure cylinder (2), low pressure (LP) cylinder (4) and generator (5) are sequentially connected；First low-temperature multi-effect
Evaporator (12), the second low-temperature multi-effect evaporator (13), third low-temperature multi-effect evaporator (14), the 4th low-temperature multi-effect evaporator
(15), the light condenser (17) of the 5th low-temperature multi-effect evaporator (16) and sea is sequentially connected；The seawer outlet of the light condenser (17) in sea
The seawater inlet of each low-temperature multi-effect evaporator is connected to by seawater transportation water pump (18)；Middle pressure, low pressure (LP) cylinder communicating pipe (3) steam extraction
End is connected to by the first control valve (8) and the first spray desuperheating device (9) with the light TVC valves (10) in sea；Second low-temperature multi-effect evaporates
The steam (vapor) outlet of device (13), light TVC valves (10) outlet in sea are evaporated by the second spray desuperheating device (11) and the first low-temperature multi-effect
Device (12) connects；Low pressure (LP) cylinder (4) extraction opening is more by the second control valve (7) and the second spray desuperheating device (11) and the first low temperature
Evaporator (12) is imitated to connect；The low vacuum steam exhaust outlet of low pressure (LP) cylinder (4) passes through third control valve (6) and the second spray desuperheating device
(11) it is connect with the first low-temperature multi-effect evaporator (12).
2. a kind of seawater desalination system of multi-mode heating vapour source according to claim 1, which is characterized in that the seawater
The multi-mode heating vapour source of desalination system is the control by the first control valve (8), the second control valve (7) and third control valve (6)
System, can in the first pattern, second mode, the third mode and fourth mode operation；
The first mode is opened for the first control valve (8), and the second control valve (7) and third control valve (6) are closed, in
Pressure, the steam extraction of low pressure (LP) cylinder communicating pipe (3) enter the light TVC valves in sea by the first control valve (8) and the first spray desuperheating device (9)
(10) it is used as seawater desalination system to heat steam；
The second mode is opened for the second control valve (7), and the first control valve (8) and third control valve (6) are closed, with low pressure
The steam extraction of cylinder (4) enters the first low-temperature multi-effect evaporator (12) by the second control valve (7) and the second spray desuperheating device (11),
Steam is heated as seawater desalination system；
The third mode is opened for (8) second control valve (7) of the first control valve, and third control valve (6) is closed；It is middle to press, is low
The steam extraction of cylinder pressure communicating pipe (3) enters the light TVC valves (10) in sea by the first control valve (8) and the first spray desuperheating device (9), and
The steam extraction of low pressure (LP) cylinder (4) enters the light TVC valves (10) in sea by the second control valve (7), pressure in formation, low pressure (LP) cylinder communicating pipe (3)
Steam extraction and the steam extraction of low pressure (LP) cylinder (4) cooperate and heat steam as seawater desalination system；
The fourth mode is opened for third control valve (6), and the first control valve (8) and the second control valve (7) are closed, low pressure (LP) cylinder
(4) low vacuum steam exhaust enters the first low-temperature multi-effect evaporator by third control valve (6) and the second spray desuperheating device (11)
(12), steam is heated as seawater desalination system.
3. a kind of seawater desalination system of multi-mode heating vapour source according to claim 1, which is characterized in that in described
Pressure, low pressure (LP) cylinder communicating pipe (3) extraction pressure are more than 0.3MPa.a.
4. a kind of seawater desalination system of multi-mode heating vapour source according to claim 1, which is characterized in that described the
Two spray desuperheating devices (11) export saturated-steam temperatureInto the steam of the second spray desuperheating device (11)
Pressure is
5. a kind of seawater desalination system of multi-mode heating vapour source according to claim 1, which is characterized in that the sea
When water desalination system is run with fourth mode, low pressure (LP) cylinder (4) low vacuum steam exhaust heats steam, pressure as seawater desalination system
For
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110847976A (en) * | 2019-11-13 | 2020-02-28 | 西安交通大学 | Water-electricity cogeneration system for wide-load operation of power plant and operation method |
| CN114906898A (en) * | 2022-04-13 | 2022-08-16 | 西安热工研究院有限公司 | System and method for desalinating seawater by using heat supply back pressure steam turbine generator unit |
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| CN103272467A (en) * | 2013-05-31 | 2013-09-04 | 华北电力大学 | Improved heat integration coal-fired power plant decarbonization system and method |
| CN104307308A (en) * | 2014-10-26 | 2015-01-28 | 华北电力大学（保定） | Process system for decarbonizing by using photovoltaic assisted coal combustion set |
| CN105110400A (en) * | 2015-09-21 | 2015-12-02 | 山东电力建设第一工程公司 | Turbine dead steam latent heat comprehensive utilization thermodynamic system |
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| CN110847976A (en) * | 2019-11-13 | 2020-02-28 | 西安交通大学 | Water-electricity cogeneration system for wide-load operation of power plant and operation method |
| CN114906898A (en) * | 2022-04-13 | 2022-08-16 | 西安热工研究院有限公司 | System and method for desalinating seawater by using heat supply back pressure steam turbine generator unit |
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