CN108706668B - Seawater desalination system with multi-mode heating steam source - Google Patents
Seawater desalination system with multi-mode heating steam source Download PDFInfo
- Publication number
- CN108706668B CN108706668B CN201810699637.2A CN201810699637A CN108706668B CN 108706668 B CN108706668 B CN 108706668B CN 201810699637 A CN201810699637 A CN 201810699637A CN 108706668 B CN108706668 B CN 108706668B
- Authority
- CN
- China
- Prior art keywords
- low
- steam
- control valve
- effect evaporator
- pressure cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a seawater desalination system of a multi-mode heating steam source, which belongs to the technical field of seawater desalination by utilizing steam turbine extraction steam. The system combines a low-temperature multi-effect distillation device with a thermal power generation system to desalinate sea water in multiple modes, and respectively utilizes the communicating pipe steam extraction of a low-pressure cylinder in a turbine with higher parameters, the steam extraction of the low-pressure cylinder with lower parameters and the exhaust steam of the low-pressure cylinder as heating steam of a sea water desalination system.
Description
Technical Field
The invention belongs to the technical field of steam turbines and seawater desalination, and particularly relates to a seawater desalination system with a multi-mode heating steam source.
Background
Since the 50 s of the 20 th century, the technology of sea water desalination has been rapidly developed and applied with the occurrence of the shortage of fresh water resources, and has become one of the important ways to solve the water resource crisis. The sea water desalination is a technology for obtaining fresh water resources by utilizing energy, and can be divided into a multi-stage flash evaporation technology and a multi-effect distillation thermal technology which mainly consume heat energy and a reverse osmosis membrane technology which mainly consume electric energy according to different energy forms in the desalination process. Among them, the low-temperature multi-effect distillation method is one of the most energy-saving methods in the sea water desalination technology, and has been rapidly developed in recent years, and the scale of the apparatus is increasingly enlarged.
At present, the steam pressure used by domestic low-temperature multi-effect distillation sea water desalination device is generally in The temperature is->And the steam enters the sea water desalting device as a heating steam source after temperature and pressure reduction. However, the low-temperature multi-effect distillation method adopts high-quality steam turbine extraction steam as a sea-light heating steam source, which can cause higher actual running cost of sea water desalination and greatly restrict engineering application, market popularization and market competitiveness.
The prior art has the problems of high-grade energy loss in the temperature and pressure reduction process, and the reasonable energy distribution is not realized to the maximum extent by using single extraction steam as a sea-water heating steam source, so that the energy-saving space exists at the part of the sea water desalination device combined with the extraction steam of the power plant, and the economic benefit of the cogeneration is not obvious enough. The thermodynamic system for comprehensively utilizing the exhaust steam latent heat of the steam turbine disclosed in the patent number CN105110400A utilizes the ejector to recycle low-pressure exhaust steam, and simultaneously utilizes the latent heat resource of the exhaust steam of the condenser, thereby effectively reducing the operation cost of the sea water desalination system. In addition, the two operation working conditions of pure condensation and high back pressure exist in the actual operation process of the generator set, the energy saving potential of the sea water desalination system with a single steam extraction mode under different operation working conditions is poor, the sea water desalination system adopting the multi-mode heating steam source is coupled with the steam turbine, the energy level matching and the cascade utilization can be realized, and the sea water desalination system adopting the multi-mode heating steam source has larger energy saving potential and economic benefit.
In summary, the invention selects the steam turbine with proper parameters as the sea water heating steam source, which can reduce the running cost of sea water desalination and improve the water production benefit of the low-temperature multi-effect distillation method; meanwhile, the mutual matching of the heating steam source and the operation mode of the generator set of the low-temperature multi-effect sea water desalting device is realized, and the high-efficiency utilization of the energy quality can be realized to the maximum extent.
Disclosure of Invention
The invention aims to provide a seawater desalination system with a multi-mode heating steam source, which mainly comprises: the system comprises a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a sea-state TVC valve, a first low-temperature multi-effect evaporator, a second low-temperature multi-effect evaporator, a third low-temperature multi-effect evaporator, a fourth low-temperature multi-effect evaporator, a fifth low-temperature multi-effect evaporator and a sea-state condenser; the device is characterized in that the high-pressure cylinder 1, the medium-pressure cylinder 2, the low-pressure cylinder 4 and the generator 5 are connected in sequence; the first low-temperature multi-effect evaporator 12, the second low-temperature multi-effect evaporator 13, the third low-temperature multi-effect evaporator 14, the fourth low-temperature multi-effect evaporator 15, the fifth low-temperature multi-effect evaporator 16 and the sea condenser 17 are connected in sequence; the sea water outlet of the sea water condenser 17 is connected to the sea water inlets of the low-temperature multi-effect evaporators through a sea water delivery pump 18; the steam extraction end of the medium-pressure and low-pressure cylinder communicating pipe 3 is communicated with a sea water TVC valve 10 through a first control valve 8 and a first water spray attemperator 9; the steam outlet of the second low-temperature multi-effect evaporator 13 and the outlet of the sea water-diluted TVC valve 10 are connected with the first low-temperature multi-effect evaporator 12 through a second water spray attemperator 11; the steam extraction port of the low pressure cylinder 4 is connected with a first low-temperature multi-effect evaporator 12 through a second control valve 7 and a second water spray attemperator 11; the low vacuum exhaust steam outlet of the low pressure cylinder 4 is connected with a first low temperature multi-effect evaporator 12 through a third control valve 6 and a second water spraying attemperator 11.
The multi-mode heating steam source of the sea water desalination system can operate in a first mode, a second mode, a third mode and a fourth mode by controlling the first control valve 8, the second control valve 7 and the third control valve 6;
the first mode is that a first control valve 8 is opened, a second control valve 7 and a third control valve 6 are closed, and the extraction steam of a medium-pressure cylinder communicating pipe 3 and a low-pressure cylinder communicating pipe 3 are used as heating steam of the sea water desalination system;
the second mode is that a second control valve 7 is opened, a first control valve 8 and a third control valve 6 are closed, and the extracted steam of the low-pressure cylinder 4 enters a first low-temperature multi-effect evaporator 12 through the second control valve 7 and a second water spraying and temperature reducing device 11 to serve as heating steam of a sea water desalination system;
the third mode is that the first control valve 8 and the second control valve 7 are opened, and the third control valve 6 is closed; the steam extraction of the medium-pressure and low-pressure cylinder communicating pipe 3 enters the sea water-saving TVC valve 10 through the first control valve 8 and the first water spray attemperator 9, and the steam extraction of the low-pressure cylinder 4 enters the sea water-saving TVC valve 10 through the second control valve 7, so that the steam extraction of the medium-pressure and low-pressure cylinder communicating pipe 3 and the steam extraction of the low-pressure cylinder are mutually matched to be used as heating steam of a sea water desalination system;
the fourth mode is that the third control valve 6 is opened, the first control valve 8 and the second control valve 7 are closed, and low-vacuum exhaust steam of the low-pressure cylinder enters the first low-temperature multi-effect evaporator 12 through the third control valve and the second water spraying and temperature reducing device to serve as heating steam of the sea water desalination system.
The extraction pressure of the medium-pressure and low-pressure cylinder communicating pipe (3) is more than 0.3MPa.
The saturated steam temperature at the outlet of the second water spray temperature reducing device (11) isThe steam pressure entering the second spray attemperator (11) is +>
When the sea water desalination system operates in the fourth mode, the low vacuum exhaust steam of the low pressure cylinder 4 is used as heating steam of the sea water desalination system, and the pressure is that
The invention has the beneficial effects that the low-temperature multi-effect distillation device is combined with the thermal power generation system, the communicating pipe steam extraction of the middle-low pressure cylinder of the steam turbine with higher parameters, the low-pressure cylinder steam extraction with lower parameters and the exhaust steam of the low pressure cylinder are respectively utilized as heating steam of the sea water desalination system, and meanwhile, the communicating pipe steam extraction of the middle-low pressure cylinder and the steam extraction of the low pressure cylinder are mutually matched to drive the sea water desalination system. The seawater desalination system is driven by selecting a steam turbine with proper parameters, so that the matching of high-low parameter steam is realized, fresh water resources are produced at low cost while the running state of a generator set is considered, and the co-production energy-saving effect and economic benefit are remarkable; the high-efficiency utilization of the energy quality is realized to the maximum extent.
Drawings
FIG. 1 is a schematic diagram of a seawater desalination system with a multi-mode heating vapor source.
Detailed Description
The invention provides a sea water desalination system with a multi-mode heating steam source, which mainly comprises: the system comprises a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a sea-state TVC valve, a first low-temperature multi-effect evaporator, a second low-temperature multi-effect evaporator, a third low-temperature multi-effect evaporator, a fourth low-temperature multi-effect evaporator, a fifth low-temperature multi-effect evaporator and a sea-state condenser; the invention is controlled by the first control valve 8, the second control valve 7 and the third control valve 6, and can operate in a first mode, a second mode, a third mode and a fourth mode; the present invention will be explained in detail below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a seawater desalination system using a multi-mode heating vapor source. In the figure, a high-pressure cylinder 1, a medium-pressure cylinder 2, a low-pressure cylinder 4 and a generator 5 are sequentially connected; the first low-temperature multi-effect evaporator 12, the second low-temperature multi-effect evaporator 13, the third low-temperature multi-effect evaporator 14, the fourth low-temperature multi-effect evaporator 15, the fifth low-temperature multi-effect evaporator 16 and the sea condenser 17 are connected in sequence; the sea water outlet of the sea water condenser 17 is connected to the sea water inlets of the low-temperature multi-effect evaporators through a sea water delivery pump 18; the steam extraction end of the medium-pressure and low-pressure cylinder communicating pipe 3 is communicated with a sea water TVC valve 10 through a first control valve 8 and a first water spray attemperator 9; the steam outlet of the second low-temperature multi-effect evaporator 13 and the outlet of the sea water-diluted TVC valve 10 are connected with the first low-temperature multi-effect evaporator 12 through a second water spray attemperator 11; the steam extraction port of the low pressure cylinder 4 is connected with a first low-temperature multi-effect evaporator 12 through a second control valve 7 and a second water spray attemperator 11; the low vacuum exhaust steam outlet of the low pressure cylinder 4 is connected with a first low temperature multi-effect evaporator 12 through a third control valve 6 and a second water spraying attemperator 11. Wherein the steam extraction pressure of the medium-pressure and low-pressure cylinder communicating pipe 3 is more than 0.3MPa.a, and the saturated steam temperature at the outlet of the second water spray attemperator 11 is The steam pressure entering the second spray attemperator 11 is +.>
When the sea water desalination system operates in the fourth mode, the low vacuum exhaust steam of the low pressure cylinder 4 is used as heating steam of the sea water desalination system, and the pressure is that
The sea water desalination system of the multi-mode heating steam source can operate in a first mode, a second mode, a third mode and a fourth mode by controlling the first control valve 8, the second control valve 7 and the third control valve 6.
The working principle of the low-temperature multi-effect sea water desalination process taking a certain 630MW extraction condensing generator set for extraction driving of 2.5 ten thousand tons/day is as follows:
the first mode of operation, the first control valve 8 is opened, the second control valve 7 and the third control valve 6 are closed, the steam extraction flow rate of the medium-pressure and low-pressure cylinder communicating pipe 3 of the steam turbine is 70t/h, the pressure is 0.55MPa.a, the steam enters the sea water desalination system evaporation steam through the water spraying first temperature reducing device 9, the sea water desalination system evaporation steam is pumped by the sea water desalination system through the sea water desalination valve 10, the outlet steam pressure is 25kPa.a, and the temperature is reduced to 65 ℃ after the steam passes through the second water spraying temperature reducing device 11 to be used as the heating steam of the sea water desalination system.
The second mode of operation, the second control valve 7 is opened, the first control valve 8 and the third control valve 6 are closed, the extraction flow of the low-pressure cylinder 4 is 120t/h, and the extraction steam enters the first low-temperature multi-effect evaporator 12 through the second control valve 7 and the second water spraying and temperature reducing device 11 to be used as heating steam of the sea water desalination system.
The third mode is operated, the first control valve 8 and the second control valve 7 are opened, and the third control valve 6 is closed; the steam extraction flow rate of the medium-pressure and low-pressure cylinder communicating pipe 3 is 60t/h, the pressure is 0.55MPa.a, the steam extraction flow rate of the low-pressure cylinder 4 is 20t/h, the pressure is 45kPa.a, the steam extraction enters the sea-level TVC valve 10 through the first control valve 8 and the first water spray attemperator 9, and the steam extraction of the low-pressure cylinder 4 enters the sea-level TVC valve 10 through the second control valve 7, so that the steam extraction of the medium-pressure and low-pressure cylinder communicating pipe 3 and the steam extraction of the low-pressure cylinder are mutually matched to serve as heating steam of a sea water desalination system.
And when the generator set enters a high back pressure operation mode, the sea water desalination system operates in the fourth mode, the third control valve 6 is opened, the first control valve 8 and the second control valve 7 are closed, the low vacuum exhaust steam flow of the low pressure cylinder is 120t/h, the pressure is 35kPa, and the sea water desalination system enters the first low temperature multi-effect evaporator 12 after being cooled by the third control valve 6 and the second water spray temperature reducing device 11 to be used as heating steam of the sea water desalination system.
The sea water desalination system heats steam, releases vaporization latent heat in the heat exchange tube of the first low-temperature multi-effect evaporator 12, and then becomes condensed water to be discharged outwards; the seawater outside the heat exchange tube of the first low-temperature multi-effect evaporator 12 absorbs heat to generate secondary steam, and enters the steam inlet of the second low-temperature multi-effect evaporator 13 to be used as heating steam of the second low-temperature multi-effect evaporator 13; the sea water which is not evaporated outside the heat exchange tubes of the first low-temperature multi-effect evaporator 12 enters the strong brine inlet of the second low-temperature multi-effect evaporator 13 from the strong brine outlet of the first low-temperature multi-effect evaporator 12.
The heating steam of the second low-temperature multi-effect evaporator 13 releases vaporization latent heat in the heat exchange tube of the second low-temperature multi-effect evaporator 13 to become distilled water, and distilled water of the second low-temperature multi-effect evaporator 13 enters the distilled water inlet of the third low-temperature multi-effect evaporator 14 from the distilled water outlet of the second low-temperature multi-effect evaporator 13; the seawater outside the heat exchange tube of the second low-temperature multi-effect evaporator 13 absorbs heat to generate secondary steam, and enters the steam inlet of the third low-temperature multi-effect evaporator 14 to be used as heating steam of the third low-temperature multi-effect evaporator 14; the sea water which is not evaporated outside the heat exchange tube of the second low-temperature multi-effect evaporator 13 enters the strong brine inlet of the third low-temperature multi-effect evaporator 14 from the strong brine outlet of the second low-temperature multi-effect evaporator 13.
The heating steam of the third low-temperature multi-effect evaporator 14 releases vaporization latent heat in the heat exchange tube of the third low-temperature multi-effect evaporator 14 to become distilled water, and distilled water of the third low-temperature multi-effect evaporator 14 enters the distilled water inlet of the fourth low-temperature multi-effect evaporator 15 from the distilled water outlet of the third low-temperature multi-effect evaporator 14; the seawater outside the heat exchange tube of the third low-temperature multi-effect evaporator 14 absorbs heat to generate secondary steam, and enters the steam inlet of the fourth low-temperature multi-effect evaporator 15 to be used as heating steam of the fourth low-temperature multi-effect evaporator 15; the sea water which is not evaporated outside the heat exchange tube of the third low-temperature multi-effect evaporator 14 enters the strong brine inlet of the fourth low-temperature multi-effect evaporator 15 from the strong brine outlet of the third low-temperature multi-effect evaporator 14.
The heating steam of the fourth low-temperature multi-effect evaporator 15 releases vaporization latent heat in the heat exchange tube of the fourth low-temperature multi-effect evaporator 15 to become distilled water, and distilled water of the fourth low-temperature multi-effect evaporator 15 enters the distilled water inlet of the fifth low-temperature multi-effect evaporator 16 from the distilled water outlet of the fourth low-temperature multi-effect evaporator 15; the seawater outside the heat exchange tube of the fourth low-temperature multi-effect evaporator 15 absorbs heat to generate secondary steam, and the secondary steam enters the steam inlet of the fifth low-temperature multi-effect evaporator 16 to be used as heating steam of the fifth low-temperature multi-effect evaporator 16; the sea water which is not evaporated outside the heat exchange tube of the fourth low-temperature multi-effect evaporator 15 enters the concentrated brine inlet of the fifth low-temperature multi-effect evaporator 16 from the concentrated brine outlet of the fourth low-temperature multi-effect evaporator 15.
The heating steam of the fifth low-temperature multi-effect evaporator 16 releases vaporization latent heat in a heat exchange tube of the fifth low-temperature multi-effect evaporator 16 to become distilled water, partial seawater outside the heat exchange tube of the fifth low-temperature multi-effect evaporator 16 absorbs heat to generate secondary steam which enters a sea-light condenser 17, enters a distilled water inlet of the fifth low-temperature multi-effect evaporator 16 after condensation, and distilled water of each low-temperature multi-effect evaporator is collected to a distilled water outlet of the fifth low-temperature multi-effect evaporator 16 to be discharged outside; the sea water which is not evaporated outside the heat exchange tubes of the fifth low-temperature multi-effect evaporator 16 goes to the concentrated brine outlet of the fifth low-temperature multi-effect evaporator 16, and the concentrated brine of each low-temperature multi-effect evaporator is gathered to the concentrated brine outlet of the fifth low-temperature multi-effect evaporator 16 and discharged outside.
Claims (4)
1. A seawater desalination system with a multi-mode heating vapor source, the system mainly comprising: the system comprises a high-pressure cylinder (1), a medium-pressure cylinder (2), a low-pressure cylinder (4), a sea light TVC valve (10), a first low-temperature multi-effect evaporator (12), a second low-temperature multi-effect evaporator (13), a third low-temperature multi-effect evaporator (14), a fourth low-temperature multi-effect evaporator (15), a fifth low-temperature multi-effect evaporator (16) and a sea light condenser (17); the high-pressure cylinder (1), the medium-pressure cylinder (2), the low-pressure cylinder (4) and the generator (5) are sequentially connected; the first low-temperature multi-effect evaporator (12), the second low-temperature multi-effect evaporator (13), the third low-temperature multi-effect evaporator (14), the fourth low-temperature multi-effect evaporator (15), the fifth low-temperature multi-effect evaporator (16) and the sea condenser (17) are sequentially connected; the sea water outlet of the sea water condenser (17) is connected to the sea water inlet of each low-temperature multi-effect evaporator through a sea water delivery pump (18); the steam extraction end of the medium-pressure and low-pressure cylinder communicating pipe (3) is communicated with a sea water TVC valve (10) through a first control valve (8) and a first water spray temperature reducing device (9); the steam outlet of the second low-temperature multi-effect evaporator (13) and the outlet of the sea-state TVC valve (10) are connected with the first low-temperature multi-effect evaporator (12) through a second water spray attemperator (11); the steam extraction port of the low-pressure cylinder (4) is connected with a first low-temperature multi-effect evaporator (12) through a second control valve (7) and a second water spray attemperator (11); the low-vacuum exhaust steam outlet of the low-pressure cylinder (4) is connected with a first low-temperature multi-effect evaporator (12) through a third control valve (6) and a second water spraying and temperature reducing device (11); it is characterized in that the method comprises the steps of,
the multi-mode heating steam source of the sea water desalination system can operate in a first mode, a second mode, a third mode and a fourth mode by controlling a first control valve (8), a second control valve (7) and a third control valve (6);
the first mode is that a first control valve (8) is opened, a second control valve (7) and a third control valve (6) are closed, and the extracted steam of a medium-pressure and low-pressure cylinder communicating pipe (3) enters a sea water TVC valve (10) through the first control valve (8) and a first water spraying and temperature reducing device (9) to serve as heating steam of a sea water desalination system;
the second mode is that a second control valve (7) is opened, a first control valve (8) and a third control valve (6) are closed, and the extracted steam of the low-pressure cylinder (4) enters a first low-temperature multi-effect evaporator (12) through the second control valve (7) and a second water spraying and temperature reducing device (11) to serve as heating steam of a sea water desalination system;
the third mode is that a first control valve (8), a second control valve (7) is opened, and a third control valve (6) is closed; the extraction steam of the medium-pressure and low-pressure cylinder communicating pipe (3) enters the sea-water TVC valve (10) through the first control valve (8) and the first water spray attemperator (9), and the extraction steam of the low-pressure cylinder (4) enters the sea-water TVC valve (10) through the second control valve (7), so that the extraction steam of the medium-pressure and low-pressure cylinder communicating pipe (3) and the extraction steam of the low-pressure cylinder (4) are mutually matched to be used as heating steam of the sea water desalination system;
the fourth mode is that a third control valve (6) is opened, a first control valve (8) and a second control valve (7) are closed, and low-vacuum exhaust steam of the low-pressure cylinder (4) enters a first low-temperature multi-effect evaporator (12) through the third control valve (6) and a second water spraying and temperature reducing device (11) to serve as heating steam of the sea water desalination system.
2. The seawater desalination system of a multi-mode heating vapor source according to claim 1, wherein the vapor extraction pressure of the medium-pressure and low-pressure cylinder communicating pipe (3) is more than 0.3mpa.
3. A seawater desalination system with multi-mode heating gas source according to claim 1, wherein the saturated steam temperature at the outlet of the second spray attemperator (11) isThe steam pressure entering the second spray attemperator (11) is +>
4. The seawater desalination system of claim 1, wherein when the seawater desalination system is operated in the fourth mode, low vacuum exhaust steam of the low pressure cylinder (4) is used as heating steam of the seawater desalination system, and the pressure is the same as the pressure of the heating steam
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810699637.2A CN108706668B (en) | 2018-06-29 | 2018-06-29 | Seawater desalination system with multi-mode heating steam source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810699637.2A CN108706668B (en) | 2018-06-29 | 2018-06-29 | Seawater desalination system with multi-mode heating steam source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108706668A CN108706668A (en) | 2018-10-26 |
| CN108706668B true CN108706668B (en) | 2023-07-18 |
Family
ID=63872293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810699637.2A Active CN108706668B (en) | 2018-06-29 | 2018-06-29 | Seawater desalination system with multi-mode heating steam source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108706668B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847976B (en) * | 2019-11-13 | 2020-10-27 | 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557168A (en) * | 2011-12-05 | 2012-07-11 | 北京朗新明环保科技有限公司 | Heat-pipe low-temperature multi-effect sea water desalinating system and process flow |
| 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 |
-
2018
- 2018-06-29 CN CN201810699637.2A patent/CN108706668B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557168A (en) * | 2011-12-05 | 2012-07-11 | 北京朗新明环保科技有限公司 | Heat-pipe low-temperature multi-effect sea water desalinating system and process flow |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108706668A (en) | 2018-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100506706C (en) | Low-temperature multi-effect seawater desalination process | |
| CN103265089B (en) | High temperature high efficiency multi-effect seawater distillation desalination apparatus and method | |
| CN104355471B (en) | A kind of hotting mask coupling seawater desalination system and technique | |
| CN101948148A (en) | Energy-saving low-temperature multiple-effect seawater desalting device | |
| CN103043735B (en) | Heat pump type small seawater desalting device | |
| CN107381688B (en) | Water and electricity cogeneration system for low-temperature multi-effect seawater desalination matched with high back pressure unit | |
| CN104399267B (en) | A kind of flash distillation wave steam recompression continuous evaporation system | |
| CN104445481A (en) | Waste heat electricity-water coproduction system | |
| CN108706668B (en) | Seawater desalination system with multi-mode heating steam source | |
| CN107445233A (en) | A kind of mechanical compression type multiple-effect distillation seawater desalination system of Coupling Water-source Heat Pump | |
| CN102344178A (en) | Thermal steam compression, evaporation and desalination system with function of steam reheating and method | |
| CN210176512U (en) | Seawater desalination system utilizing waste heat of gas turbine | |
| CN111908542A (en) | Seawater desalination system and method utilizing waste heat of gas turbine | |
| CN106698564A (en) | Sea water desalinization method by waste heat recovery | |
| CN206278947U (en) | Heat-pump-type efficient cryogenic sea water desalinating unit | |
| CN106440487B (en) | A kind of combined twin-stage steam heat pump system | |
| CN105110400A (en) | Turbine dead steam latent heat comprehensive utilization thermodynamic system | |
| CN108529657A (en) | Multi-effect evaporating device and technique applied to alumina refinery | |
| CN109798696B (en) | High-temperature heat pump system for recovering waste heat of industrial wastewater by using water as working medium and control method thereof | |
| CN102267733A (en) | Industrial waste heat low-temperature multi-effect seawater desalting system | |
| CN202116342U (en) | Industrial exhaust heat low-temperature multiple-effect seawater desalinization system | |
| CN111924922B (en) | System and method for realizing cement production, seawater desalination and power generation in coastal region in combined manner | |
| CN201901602U (en) | Energy-saving, low-temperature and multiple-effect sea water desalinating device | |
| CN211004651U (en) | Seawater desalination system | |
| CN210214860U (en) | Multistage flash evaporation seawater desalination system for recovering flue gas waste heat by using absorption heat pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |