CN210559478U - Wind-solar complementary two-stage flash evaporation seawater desalination system based on vortex tube - Google Patents
Wind-solar complementary two-stage flash evaporation seawater desalination system based on vortex tube Download PDFInfo
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- CN210559478U CN210559478U CN201920901977.9U CN201920901977U CN210559478U CN 210559478 U CN210559478 U CN 210559478U CN 201920901977 U CN201920901977 U CN 201920901977U CN 210559478 U CN210559478 U CN 210559478U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/141—Wind power
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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
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
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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
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A wind-solar complementary two-stage flash seawater desalination system based on a vortex tube comprises a seawater conveying unit, a heat exchanger, a solar heating circulation unit, a primary flash evaporator, a secondary flash evaporator, a concentrated brine tank, a wind power compressor, a vortex tube, a condenser and a fresh water tank; the output end of the seawater conveying unit is connected with the input end of the heat exchanger, and the output end of the heat exchanger is connected with the primary flash evaporator; the heat exchanger is connected with the solar heating circulation unit, and a seawater outlet of the primary flash evaporator is connected with the secondary flash evaporator; the seawater outlet of the secondary flash evaporator is connected with the concentrated brine tank, and the steam outlets of the primary flash evaporator and the secondary flash evaporator are connected with the steam inlet of the condenser; the outlet of the condenser is connected with a fresh water tank; the output end of the wind power compressor is connected with a high-pressure air inlet of a vortex tube, the hot end of the vortex tube is connected with a primary flash evaporator, and the cold end of the vortex tube is connected with a condenser. The utility model discloses simple structure, flash distillation are efficient, and condensation efficiency is high and utilize wind energy solar energy, and is pollution-free to the environment.
Description
The technical field is as follows:
the utility model belongs to the seawater desalination field of engineering thermophysical discipline, in particular to a wind-solar complementary two-stage flash seawater desalination system based on a vortex tube.
Background art:
since the 20 th century and the 50 th century, the seawater desalination technology has been developed rapidly along with the increase of water resource crisis, and among more than twenty developed desalination technologies, the distillation method, the electrodialysis method and the reverse osmosis method all reach the level of industrial scale production and are widely applied all over the world.
From the large classification, the distillation method (thermal method) and the membrane method are mainly divided into two main categories, wherein the low-temperature multi-effect distillation method, the multi-stage flash evaporation method and the reverse osmosis membrane method are the main global technologies. For a wind-solar complementary two-stage flash evaporation seawater desalination system, the system has the advantages of multiple effects, energy conservation, low requirement on seawater pretreatment, high quality of desalinated water, effective utilization of renewable clean energy such as wind energy, solar energy and the like, no pollution to the environment, rich energy, low price and the like, a reverse osmosis membrane method has the advantages of low investment, low energy consumption and the like, but the seawater pretreatment requirement is high, and a multi-stage flash evaporation method has the advantages of mature technology, reliable operation, high device yield and the like, but the energy consumption is higher. Therefore, the wind-solar complementary two-stage flash seawater desalination system technology based on the vortex tube is a novel technology worthy of popularization and development in the future. At present, the problem of shortage of fresh water resources in coastal cities in China is more and more urgent, and various measures are continuously taken by the nation to make up for the shortage of fresh water resources. The seawater desalination by utilizing renewable energy sources such as wind energy, solar energy and the like is one of effective technical approaches which are expected to relieve the shortage of fresh water resources.
The wind-solar complementary two-stage flash seawater desalination technology based on the vortex tube means that the system comprises two-stage flash evaporation, wherein the first-stage flash evaporation is realized by heating a solar heat collector, the second-stage flash evaporation is realized by heating seawater by hot fluid obtained from a hot gas end of the vortex tube, working fluid of the vortex tube is provided by a gas compressor driven by a wind turbine, and water vapor generated by the two-stage flash evaporation is cooled by cold fluid generated from a cold gas end of the vortex tube to generate fresh water. The system properly and flexibly utilizes the vortex tube, has a simple vortex tube structure, can refrigerate at one end and heat at the other end, has no moving part, is small in maintenance workload and extremely reliable in work, prolongs the service life of the system, does not consume external power, and reduces primary investment and operating cost.
The essence of the distillation desalination process is the formation process of water vapor, and the principle is like that seawater is heated and evaporated to form cloud, and the cloud forms rain when meeting cold under certain conditions. There are a distillation method, a vapor compression distillation method, a two-stage flash distillation method, and the like according to the equipment. Flash evaporation is the phenomenon in which a saturated liquid at high pressure, after entering a relatively low pressure vessel, is converted into a portion of saturated vapor and liquid at the vessel pressure due to a sudden drop in pressure. The second-stage flash evaporation seawater desalination is that the heated seawater is evaporated in two flash evaporation chambers with gradually reduced pressure in turn, and the steam is condensed to obtain fresh water. At present, the global seawater desalination device still has the maximum yield by a multistage flash evaporation method, the mature technology has high operation safety and large elasticity, is mainly combined with a thermal power station for construction, is suitable for large-scale and ultra-large desalination devices, and is mainly adopted in gulf countries and coastal areas. The multistage flash evaporation technology is mature and reliable in operation, and the main development trend is to improve the single-machine water making capacity of the device, reduce unit power consumption, improve heat transfer efficiency and the like. Coastal cities have rich seawater resources, and seawater desalination is a powerful way for solving the problem of lack of fresh water resources in the future. The wind and light complementation is utilized to desalt the seawater, a large amount of cheap heat sources can be utilized, and solar energy and wind energy are used as new energy sources, so that the method has the characteristics of cleanness, safety, economy and the like. The selection of the seawater desalination device requires high heat energy utilization efficiency, good heat transfer performance, lower manufacturing cost, large water yield, stable and safe process operation and the like.
The utility model has the following contents:
the utility model aims at providing a wind-solar complementary two-stage flash seawater desalination system based on a vortex tube, which can solve the defects of the prior art, has simple structure, small volume, light weight, high flash efficiency and high condensation efficiency, utilizes novel wind energy and solar energy, and has no pollution to the environment; the method can realize the production of fresh water efficiently, economically, stably and reliably so as to meet the requirements of human beings, industry, production and life.
The technical scheme of the utility model: a wind-solar complementary two-stage flash seawater desalination system based on a vortex tube is characterized by comprising: the system comprises a seawater conveying unit, a heat exchanger, a solar heating circulation unit, a primary flash evaporator, a secondary flash evaporator, a concentrated brine tank, a wind power compressor, a vortex tube, a condenser and a fresh water tank; the output end of the seawater conveying unit is connected with the input end of the heat exchanger, and the output end of the heat exchanger is connected with the primary flash evaporator; the heat exchanger is connected with the solar heating circulating unit; the seawater outlet of the primary flash evaporator is connected with the secondary flash evaporator, and the steam outlet of the primary flash evaporator is connected with the steam inlet of the condenser; the seawater outlet of the secondary flash evaporator is connected with the concentrated brine tank, and the steam outlet of the secondary flash evaporator is connected with the steam inlet of the condenser; the outlet of the condenser is connected with a fresh water tank; the output end of the wind power compressor is connected with a high-pressure air inlet of a vortex tube, the hot end of the vortex tube is connected with a primary flash evaporator, and the cold end of the vortex tube is connected with a condenser.
The sea water conveying unit comprises a sea water tank and a water pump I, and the sea water tank is connected with the input end of the heat exchanger through the water pump I.
The solar heating circulation unit comprises a solar vacuum heat collecting tube and a water pump II, the solar vacuum heat collecting tube heats circulating water, and the water pump II provides circulating power.
The wind power compressor generates high-pressure air which enters the vortex pipe from the high-pressure air inlet through the screw air compressor.
The primary flash evaporator and the secondary flash evaporator are both connected with a vacuum pump, and the vacuum pump provides a vacuum environment for the primary flash evaporator and the secondary flash evaporator.
The utility model discloses a working process:
the seawater conveying unit conveys original seawater to the heat exchanger, the seawater and circulating water of the solar heating circulating unit complete heat exchange through the heat exchanger, and the seawater after heat exchange is conveyed into a primary flash evaporator connected with the heat exchanger; high-pressure gas generated by the wind power compressor enters a vortex tube from a high-pressure air inlet, hot air generated at a hot gas end of the vortex tube heats hot seawater in a primary flash evaporator, seawater which is not evaporated in the primary flash evaporator enters a secondary flash evaporator, and seawater which is not evaporated in the secondary flash evaporator enters a concentrated brine tank; the steam generated by the first-stage flash evaporator and the second-stage flash evaporator enters a condenser; the cold air generated by the cold air end of the vortex tube enters the condenser to condense the steam, and the liquid generated by condensation flows into the fresh water tank through the outlet of the condenser.
And the original seawater in the seawater tank is conveyed to the heat exchanger through a water pump I.
The solar vacuum heat collecting tube of the solar heating circulation unit heats circulating water, and a water pump II provides circulating power; the heat is generated by the solar vacuum heat collecting tube, when the sunlight irradiation is sufficient and the wind power is weak, the solar vacuum heat collecting tube works normally, the solar energy is absorbed for heating seawater, and the hot water is a driving heat source for maintaining the normal operation of the evaporation system.
The seawater enters a first-stage flash evaporator after heat exchange is finished by a heat exchanger, the boiling point of water in the first-stage flash evaporator is reduced, namely, hot water is boiled and vaporized rapidly in the first-stage flash evaporator, and two phases are separated; the seawater which does not finish the two-phase separation flows into a secondary flash evaporator from an outlet at the bottom of the primary flash evaporator for secondary flash evaporation; the steam obtained by the first-stage flash evaporator and the second-stage flash evaporator is converged into the condenser through outlets above the first-stage flash evaporator and the second-stage flash evaporator.
The high-pressure gas expands in a nozzle chamber of the vortex tube and then enters the vortex tube at a high speed in a tangential direction; when the airflow rotates at a high speed in the vortex tube, the airflow is separated into two parts of airflow with unequal temperatures after vortex conversion, the temperature of the airflow at the central part is low, the temperature of the airflow at the outer layer is high, and high-low temperature gas is shunted; the vortex tube can adjust the flow of gas and the temperature of the cold air end by adjusting a valve at the hot end, so as to obtain a proper cold air parameter, namely the ratio of input high-pressure air to output cold air.
The utility model has the advantages that: 1. the vortex tube has small refrigerating and heating volume, light weight and long service life without moving parts, the air compressor is a wind compressor, and the water pump adopts common marine electromechanical products. 2. The used energy is solar energy and wind energy, a large amount of cheap heat sources can be utilized by utilizing the solar energy and the wind energy, and the solar energy and the wind energy are new energy and have the characteristics of cleanness, safety, economy and the like. 3. The devices are well combined and operated, and great functions and effects are provided in the whole process. 4. The system has the advantages of simple structure, reliable operation, safety, economy, high efficiency, long service life, easy maintenance, design, vigorous development and the like.
Description of the drawings:
FIG. 1 is a schematic diagram of a wind-solar complementary two-stage flash seawater desalination system based on a vortex tube.
In the drawings: the system comprises a seawater tank 1, a water pump I2, a heat exchanger 3, a solar vacuum heat collecting pipe 4, a primary flash evaporator 5, a secondary flash evaporator 6, a concentrated brine tank 7, a vacuum pump 8, a wind power compressor 9, a vortex tube 10, a condenser 11, a fresh water tank 12, a screw air compressor 13 and a water pump II 14.
The specific implementation mode is as follows:
example (b): as shown in fig. 1, a wind-solar complementary two-stage flash seawater desalination system based on a vortex tube is characterized by comprising: the system comprises a seawater conveying unit, a heat exchanger 3, a solar heating circulation unit, a primary flash evaporator 5, a secondary flash evaporator 6, a concentrated brine tank 7, a wind power compressor 9, a vortex tube 10, a condenser 11 and a fresh water tank 12; the output end of the seawater conveying unit is connected with the input end of the heat exchanger 3, and the output end of the heat exchanger 3 is connected with the primary flash evaporator 5; the heat exchanger 3 is connected with the solar heating circulating unit; a seawater outlet of the primary flash evaporator 5 is connected with the secondary flash evaporator 6, and a steam outlet of the primary flash evaporator 5 is connected with a steam inlet of the condenser 11; a seawater outlet of the secondary flash evaporator 6 is connected with the concentrated brine tank 7, and a steam outlet of the secondary flash evaporator 6 is connected with a steam inlet of the condenser 11; the outlet of the condenser 11 is connected with a fresh water tank 12; the output end of the wind power compressor 9 is connected with a high-pressure air inlet of a vortex tube 10, the hot gas end of the vortex tube 10 is connected with a primary flash evaporator 5, and the cold gas end of the vortex tube is connected with a condenser 11.
The sea water conveying unit comprises a sea water tank 1 and a water pump I2, and the sea water tank 1 is connected with the input end of the heat exchanger 3 through the water pump I2.
The solar heating circulation unit comprises a solar vacuum heat collecting tube 4 and a water pump II 14, the solar vacuum heat collecting tube 4 heats circulating water, and the water pump II 14 provides circulating power.
The wind power compressor 9 generates high-pressure air which enters the vortex tube 10 from a high-pressure air inlet through the screw air compressor 13.
The primary flash evaporator 5 and the secondary flash evaporator 6 are both connected with a vacuum pump 8, and the vacuum pump 8 provides a vacuum environment for the primary flash evaporator 5 and the secondary flash evaporator 6.
In the figure, the bottom of the first-stage flash evaporator 5 is provided with a hot air outlet end, and the bottom of the condenser is provided with a cold air outlet end.
The utility model discloses a working process:
the seawater conveying unit conveys original seawater to the heat exchanger 3, the seawater and circulating water of the solar heating circulating unit complete heat exchange through the heat exchanger 3, and the seawater after heat exchange is conveyed to the primary flash evaporator 5 connected with the heat exchanger 3; high-pressure gas generated by the wind power compressor 9 enters the vortex tube 10 from a high-pressure air inlet, hot air generated at a hot gas end of the vortex tube 10 heats hot seawater in the primary flash evaporator 5, seawater which is not evaporated in the primary flash evaporator 5 enters the secondary flash evaporator 6, and seawater which is not evaporated in the secondary flash evaporator 6 enters the concentrated brine tank 7; the steam generated by the primary flash evaporator 5 and the secondary flash evaporator 6 enters a condenser 11; the cold air generated by the cold air end of the vortex tube 10 enters the condenser 11 to condense the steam, and the liquid generated by condensation flows into the fresh water tank 12 through the outlet of the condenser 11.
The original seawater in the seawater tank 1 is conveyed to the heat exchanger 3 through the water pump I2.
The solar vacuum heat collecting tube 4 of the solar heating circulation unit heats circulating water, and a water pump II 14 provides circulating power; the heat is generated by the solar vacuum heat collecting tube 4, when the sunlight irradiation is sufficient and the wind power is weak, the solar vacuum heat collecting tube 4 works normally, the solar energy is absorbed for heating seawater, and the hot water is a driving heat source for maintaining the normal operation of the evaporation system.
The seawater enters a first-stage flash evaporator 5 after heat exchange is finished by a heat exchanger 3, the boiling point of water in the first-stage flash evaporator is reduced, namely, hot water is boiled and vaporized rapidly in the first-stage flash evaporator 5, and two phases are separated; the seawater which does not finish the separation of the two phases flows into a secondary flash evaporator 6 from an outlet at the bottom of a primary flash evaporator 5 for secondary flash evaporation; the steam obtained by the primary flash evaporator 5 and the secondary flash evaporator 6 is converged into the condenser 11 through outlets above the primary flash evaporator 5 and the secondary flash evaporator 6.
The high pressure gas expands in the nozzle chamber of the vortex tube 10 and then enters the vortex tube 10 at a very high velocity in the tangential direction; when the airflow rotates at a high speed in the vortex tube 10, the airflow is separated into two parts of airflow with unequal temperatures after vortex conversion, the temperature of the airflow at the central part is low, the temperature of the airflow at the outer layer is high, and high-low temperature gas is shunted; the vortex tube 10 can adjust the flow rate of the gas and the temperature of the cold air end by adjusting the valve at the hot end, so as to obtain a proper cold air parameter, namely the ratio of the input high-pressure air to the output cold air.
The device is assembled as shown in the figure, and parameters of each part and the operation of each device can be adjusted according to the operation condition, water production condition and seawater evaporation condition of each device in the debugging and operation processes, so that the operation efficiency of the wind-solar complementary two-stage flash evaporation seawater desalination system device of the vortex tube is improved, the cost in each aspect is reduced, and the system is more economic and reliable. The cold gas flow rate (the ratio of the mass flow rate of the cold gas flow to the mass flow rate of the inlet gas flow) of the vortex tube 10 is preferably controlled to be 0.15 to 0.35 to optimize the energy separation of the gas in the vortex tube 10. When the seawater desalination device is used, the vacuum pump 8 is used for exhausting air from the primary flash evaporator 5 and the secondary flash evaporator 6 and reducing the pressure, air is compressed by the wind power compressor 9 and then enters the vortex tube 10, generated hot air is used for heating seawater in the primary flash evaporator 5, a certain amount of water vapor is generated in the primary flash evaporator 5, residual seawater in the primary flash evaporator 5 enters the secondary flash evaporator 6 and is continuously subjected to pressure reduction and flash evaporation, the vapor generated in the primary flash evaporator and the secondary flash evaporator enters the condenser 11 and is subjected to sufficient heat exchange with cold air flow from the vortex tube 10, and condensed water flows into the fresh water tank 12. The seawater that is not evaporated in the secondary flash vessel 6 flows through the pipes in the flash vessel into the thick brine tank 7. The wind-solar complementary two-stage flash seawater desalination system device of the whole vortex tube is a specific implementation mode and operation.
Claims (5)
1. A wind-solar complementary two-stage flash seawater desalination system based on a vortex tube is characterized by comprising: the system comprises a seawater conveying unit, a heat exchanger (3), a solar heating circulation unit, a primary flash evaporator (5), a secondary flash evaporator (6), a concentrated brine tank (7), a wind power compressor (9), a vortex tube (10), a condenser (11) and a fresh water tank (12); the output end of the seawater conveying unit is connected with the input end of the heat exchanger (3), and the output end of the heat exchanger (3) is connected with the primary flash evaporator (5); the heat exchanger (3) is connected with the solar heating circulating unit; a seawater outlet of the primary flash evaporator (5) is connected with the secondary flash evaporator (6), and a steam outlet of the primary flash evaporator (5) is connected with a steam inlet of the condenser (11); a seawater outlet of the secondary flash evaporator (6) is connected with the concentrated brine tank (7), and a steam outlet of the secondary flash evaporator (6) is connected with a steam inlet of the condenser (11); the outlet of the condenser (11) is connected with a fresh water tank (12); the output end of the wind power compressor (9) is connected with a high-pressure air inlet of a vortex tube (10), the hot gas end of the vortex tube (10) is connected with a primary flash evaporator (5), and the cold gas end is connected with a condenser (11).
2. The wind-solar complementary two-stage flash seawater desalination system based on a vortex tube as claimed in claim 1, wherein the seawater delivery unit comprises a seawater tank (1) and a water pump I (2), and the seawater tank (1) is connected with the input end of the heat exchanger (3) through the water pump I (2).
3. The wind-solar complementary two-stage flash evaporation seawater desalination system based on a vortex tube as claimed in claim 1, wherein the solar heating circulation unit comprises a solar vacuum heat collecting tube (4) and a water pump II (14), the solar vacuum heat collecting tube (4) heats circulating water, and the circulating power is provided by the water pump II (14).
4. The wind-solar complementary two-stage flash seawater desalination system based on a vortex tube as claimed in claim 1, wherein the wind power compressor (9) generates high-pressure air which enters the vortex tube (10) from a high-pressure air inlet through a screw air compressor (13).
5. The wind-solar complementary two-stage flash seawater desalination system based on a vortex tube as claimed in claim 1, wherein the primary flash evaporator (5) and the secondary flash evaporator (6) are both connected with a vacuum pump (8), and the vacuum pump (8) provides a vacuum environment for the primary flash evaporator (5) and the secondary flash evaporator (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920901977.9U CN210559478U (en) | 2019-06-14 | 2019-06-14 | Wind-solar complementary two-stage flash evaporation seawater desalination system based on vortex tube |
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| CN201920901977.9U CN210559478U (en) | 2019-06-14 | 2019-06-14 | Wind-solar complementary two-stage flash evaporation seawater desalination system based on vortex tube |
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| CN210559478U true CN210559478U (en) | 2020-05-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282678A (en) * | 2019-06-14 | 2019-09-27 | 天津理工大学 | Wind light mutual complementing double flash evaporation seawater desalination system and working method based on vortex tube |
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2019
- 2019-06-14 CN CN201920901977.9U patent/CN210559478U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282678A (en) * | 2019-06-14 | 2019-09-27 | 天津理工大学 | Wind light mutual complementing double flash evaporation seawater desalination system and working method based on vortex tube |
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