CN114702091A - Seawater or saline water desalination system - Google Patents
Seawater or saline water desalination system Download PDFInfo
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- CN114702091A CN114702091A CN202210200143.1A CN202210200143A CN114702091A CN 114702091 A CN114702091 A CN 114702091A CN 202210200143 A CN202210200143 A CN 202210200143A CN 114702091 A CN114702091 A CN 114702091A
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- brine
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 149
- 239000013535 sea water Substances 0.000 title claims abstract description 77
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 22
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims description 22
- 239000011780 sodium chloride Substances 0.000 title claims description 22
- 239000012267 brine Substances 0.000 claims abstract description 44
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 44
- 239000013505 freshwater Substances 0.000 claims abstract description 29
- 238000005507 spraying Methods 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 claims description 33
- 239000012266 salt solution Substances 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims 1
- 230000005494 condensation Effects 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 6
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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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
- C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
-
- 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
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/28—Methods or installations for obtaining or collecting drinking water or tap water from humid air
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention relates to a seawater or brine desalination system, and belongs to the technical field of seawater desalination, water resource recovery and new energy utilization. The system comprises a seawater or brine heating system, an air spraying and humidifying system and an air condensing system; the seawater or salt water heating system comprises a solar heat collecting plate, a pressure water tank and a water replenishing pump, the air spraying and humidifying system comprises a spraying chamber, a water return pump and a three-way mixing valve, and the air condensing system comprises a fan, a condenser and a fresh water pool. The system has the advantages of simple structure, reliable operation, greenness and energy conservation.
Description
Technical Field
The invention relates to a seawater or brine desalination system, and belongs to the technical field of seawater desalination, water resource recovery and new energy utilization.
Background
70% of the earth's surface is occupied by oceans, and countless seawater is available, and in order to obtain fresh water resources from seawater, mankind has developed a variety of seawater desalination techniques. For example, the multiple-effect evaporation method and the reverse osmosis method have the defects of complex system, high cost, more high-grade energy sources and the like at different degrees.
In addition, in some industrial production processes, electrolyte salt solution is often required to be concentrated or water resources are recovered from the electrolyte salt solution, in the prior art, high-grade heat energy (heating steam) is often required to be used for heating the salt solution to evaporate water and concentrate the salt solution, and in the case of water resources being required to be recovered, an artificial cold source is also required to be used for condensing the water steam, so that the energy cost is higher.
In some northern areas of China, in winter or some transition seasons, solar energy resources are rich, and outdoor temperature is low. Therefore, it is necessary to develop a desalination technology for sea (salt) water which can fully utilize solar energy and natural cold source, and obtain fresh water or recover resources from salt water in these regions according to local conditions.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the invention provides a seawater or brine desalination system. The system has the advantages of simple structure, reliable operation, greenness and energy conservation, and has the following characteristics: 1. the system mainly comprises a seawater or brine heating system, an air spraying and humidifying system and an air condensing system. 2. The seawater or brine heating system heats seawater or brine primarily by using a solar collector. 3. The air spraying humidification system heats and humidifies air by contacting heated seawater or salt water with outdoor air, hot and humid air is sent into a condenser by a fan, and the hot and humid air is condensed by cold air outside the pipe in the condenser pipe so as to obtain fresh water. The invention is realized by the following technical scheme.
A seawater or brine desalination system comprises a seawater or brine heating system, an air spraying and humidifying system and an air condensing system;
the seawater or brine heating system comprises a solar heat collecting plate 1, a pressure water tank 2 and a water replenishing pump 3, the air spraying and humidifying system comprises a spraying chamber 4, a water returning pump 5 and a three-way mixing valve 6, and the air condensing system comprises a fan 7, a condenser 8 and a fresh water pool 9;
seawater or saline water is connected to a seawater or saline water inlet at the lower side part of a pressure water tank 2 through a water supplementing pump 3, a seawater or saline water outlet pipeline at the bottom of the pressure water tank 2 is connected with a cold water inlet of a solar heat collecting plate 1, a hot water outlet of the solar heat collecting plate 1 is connected with a seawater or saline water hot water inlet at the upper side part of the pressure water tank 2, a seawater or saline water hot water outlet pipeline at the other side of the upper part of the pressure water tank 2 is connected to an inlet of a three-way mixing valve 6, an inlet at the other end of the three-way mixing valve 6 is connected with return water from a return water pump 5, an outlet pipeline of the three-way mixing valve 6 is connected with a spray pipeline of a spray chamber 4, air is introduced into the spray chamber 4, hot and wet air from the spray chamber 4 enters a condenser 8 through a fan 7, residual return water in the spray chamber 4 is connected with the return water pump 5 through a pipeline, and fresh water is obtained by condensing outdoor air outside the condenser 8, the fresh water is collected in a fresh water basin 9.
The solar heat collecting plate 1 can be replaced by a waste heat heating device.
The seawater or brine can be replaced with an electrolyte salt solution that is free of volatile matter.
The solar heat collecting plate 1 adopts natural circulation or forced circulation.
And a pressure controller is arranged on the pressure water tank 2 and is electrically connected with the water replenishing pump 3.
The hot and humid air outlet of the spray chamber 4 is provided with a water baffle plate to prevent seawater or salt water from entering the condenser 8.
The working principle of the seawater or brine desalination system is as follows:
when the pressure in the pressure water tank 2 is lower than a set value, the water replenishing pump 3 is controlled to be started to replenish cold seawater or brine to the pressure water tank 2, the cold seawater or the brine at the lower part of the pressure water tank 2 enters the solar heat collector 1 through a descending pipe for heating, the cold seawater or the brine enters the pressure water tank 2 from a hot water inlet at the upper part of the pressure water tank 2 through an ascending pipe, the seawater at a hot water outlet at the upper part of the pressure water tank 2 flows into the three-way mixing valve 6 to be mixed with the backwater flowing out of the spray chamber 4 and then enters the spray chamber 4, the mixed hot water and the cold air are subjected to heat mass transfer in the spray chamber 4 to heat and humidify the cold air, the humidified nearly saturated wet air is conveyed to the condenser 8 by the fan 7, the moisture in the condenser 8 is condensed and separated out under the effect of cold air, and then flows into the fresh water tank 9 along a pipeline, so that seawater desalination is realized, and fresh water is obtained.
The invention has the beneficial effects that:
(1) the system is simple, safe, reliable and low in cost.
(2) The system only uses solar energy (or waste heat resources), a natural cold source and a small amount of electric energy for driving the pump and the fan, is environment-friendly and green, and has low operating cost.
Drawings
FIG. 1 is a schematic diagram of a seawater or brine desalination system according to the present invention.
In the figure: 1-solar heat collecting plate, 2-pressure water tank, 3-water replenishing pump, 4-spray chamber, 5-water returning pump, 6-three-way mixing valve, 7-blower, 8-condenser and 9-fresh water pool.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Example 1
As shown in fig. 1, the seawater or brine desalination system comprises a seawater or brine heating system, an air spray humidifying system and an air condensing system;
the seawater or brine heating system comprises a solar heat collecting plate 1, a pressure water tank 2 and a water replenishing pump 3, the air spraying and humidifying system comprises a spraying chamber 4, a water returning pump 5 and a three-way mixing valve 6, and the air condensing system comprises a fan 7, a condenser 8 and a fresh water pool 9;
seawater or brine is connected to a seawater or brine inlet at the lower side part of a pressure water tank 2 through a water replenishing pump 3, a seawater or brine outlet pipeline at the bottom of the pressure water tank 2 is connected with a cold water inlet of a solar heat collecting plate 1, a hot water outlet of the solar heat collecting plate 1 is connected with a seawater or brine hot water inlet at the upper side part of the pressure water tank 2, a seawater or brine hot water outlet pipeline at the other side of the upper part of the pressure water tank 2 is connected to an inlet of a three-way mixing valve 6, an inlet at the other end of the three-way mixing valve 6 is connected with return water from a return water pump 5, an outlet pipeline of the three-way mixing valve 6 is connected with a spray pipeline of a spray chamber 4, air is introduced into the spray chamber 4, hot and wet air from the spray chamber 4 enters a condenser 8 through a fan 7, residual return water in the spray chamber 4 is connected with the return water pump 5 through a pipeline, and the outside of the condenser 8 is condensed through outdoor air to obtain fresh water, the fresh water is collected in a fresh water basin 9.
Wherein the solar heat collecting plate 1 adopts natural circulation or forced circulation; the pressure water tank 2 is provided with a pressure controller which is electrically connected with the water replenishing pump 3; the hot and humid air outlet of the spray chamber 4 is provided with a water baffle to prevent seawater or salt water in the chamber from entering the condenser 8.
The solar heat collecting plate 1 adopts a flat plate type solar heat collector, and comprises 100 heat collectors, 25 groups of which are connected in series, wherein each group of 4 heat collectors form a heat collecting array, and the size of each heat collector is 1.8m multiplied by 1 m; the pressure of the pressure water tank 2 is set to be 0.2MPa, and the volume of the water tank is 15m3(ii) a The water replenishing pump 3 adopts a centrifugal pump with the rated flow of 25m3H, the head is 35m water column; the spray chamber 4 is 5 multiplied by 3m36 rows of opposite spraying arrangement is adopted; the backwater pump 5 adopts a centrifugal pump with rated flow of 40m3H, head 15m water column; the fan 7 adopts 1 centrifugal fan with rated flow of 60000m3H, full pressure 1600 pa; the condenser 8 adopts 4 air-cooled condensers connected in parallel, each shape is 2180X 2000X 1030 (mm), the copper pipe is additionally provided with fins, and the heat exchange area is 130m2(ii) a Fresh water pool 9 size 600m3。
The temperature of seawater or brine hot water in a seawater or brine hot water outlet of the pressure water tank 2 is 40-50 ℃, the air inlet amount of the spray chamber 4 is 46512L/min, after the seawater or the brine is heated and humidified by the spray chamber 4, the dry bulb temperature of hot and humid air at an inlet of the condenser 8 is 32 ℃, the relative humidity is 98%, after the seawater or the brine is cooled by the condenser, the dry bulb temperature is 15 ℃, the relative humidity is 95%, and water is separated out from the air.
Calculated according to 8 hours of work each day, 100m of fresh water can be obtained each day3The water pool can be fully stored in about 6 days. The fresh water can be prepared into 2 ten thousand meters per year according to the operation of 200 days per year3。
Example 2
As shown in fig. 1, the seawater or brine desalination system comprises a seawater or brine heating system, an air spray humidifying system and an air condensing system;
the seawater or brine heating system comprises a solar heat collecting plate 1, a pressure water tank 2 and a water replenishing pump 3, the air spraying and humidifying system comprises a spraying chamber 4, a water returning pump 5 and a three-way mixing valve 6, and the air condensing system comprises a fan 7, a condenser 8 and a fresh water pool 9;
seawater or saline water is connected to a seawater or saline water inlet at the lower side part of a pressure water tank 2 through a water supplementing pump 3, a seawater or saline water outlet pipeline at the bottom of the pressure water tank 2 is connected with a cold water inlet of a solar heat collecting plate 1, a hot water outlet of the solar heat collecting plate 1 is connected with a seawater or saline water hot water inlet at the upper side part of the pressure water tank 2, a seawater or saline water hot water outlet pipeline at the other side of the upper part of the pressure water tank 2 is connected to an inlet of a three-way mixing valve 6, an inlet at the other end of the three-way mixing valve 6 is connected with return water from a return water pump 5, an outlet pipeline of the three-way mixing valve 6 is connected with a spray pipeline of a spray chamber 4, air is introduced into the spray chamber 4, hot and wet air from the spray chamber 4 enters a condenser 8 through a fan 7, residual return water in the spray chamber 4 is connected with the return water pump 5 through a pipeline, and fresh water is obtained by condensing outdoor air outside the condenser 8, the fresh water is collected in a fresh water basin 9.
Wherein the solar heat collecting plate 1 can be replaced by a waste heat boiler.
Example 3
As shown in fig. 1, the seawater or brine desalination system comprises a seawater or brine heating system, an air spray humidifying system and an air condensing system;
the seawater or brine heating system comprises a solar heat collecting plate 1, a pressure water tank 2 and a water replenishing pump 3, the air spraying and humidifying system comprises a spraying chamber 4, a water returning pump 5 and a three-way mixing valve 6, and the air condensing system comprises a fan 7, a condenser 8 and a fresh water pool 9;
seawater or saline water is connected to a seawater or saline water inlet at the lower side part of a pressure water tank 2 through a water supplementing pump 3, a seawater or saline water outlet pipeline at the bottom of the pressure water tank 2 is connected with a cold water inlet of a solar heat collecting plate 1, a hot water outlet of the solar heat collecting plate 1 is connected with a seawater or saline water hot water inlet at the upper side part of the pressure water tank 2, a seawater or saline water hot water outlet pipeline at the other side of the upper part of the pressure water tank 2 is connected to an inlet of a three-way mixing valve 6, an inlet at the other end of the three-way mixing valve 6 is connected with return water from a return water pump 5, an outlet pipeline of the three-way mixing valve 6 is connected with a spray pipeline of a spray chamber 4, air is introduced into the spray chamber 4, hot and wet air from the spray chamber 4 enters a condenser 8 through a fan 7, residual return water in the spray chamber 4 is connected with the return water pump 5 through a pipeline, and fresh water is obtained by condensing outdoor air outside the condenser 8, the fresh water is collected in a fresh water basin 9.
Wherein seawater or brine can be replaced with an electrolyte salt solution that is free of volatile substances.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (6)
1. A seawater or brine desalination system, characterized in that: comprises a seawater or brine heating system, an air spraying and humidifying system and an air condensing system;
the seawater or brine heating system comprises a solar heat collecting plate (1), a pressure water tank (2) and a water replenishing pump (3), the air spraying and humidifying system comprises a spraying chamber (4), a water returning pump (5) and a three-way mixing valve (6), and the air condensing system comprises a fan (7), a condenser (8) and a fresh water pool (9);
seawater or saline water is connected to a seawater or saline water inlet at the lower side part of a pressure water tank (2) through a water supplementing pump (3) pipeline, a seawater or saline water outlet pipeline at the bottom part of the pressure water tank (2) is connected with a cold water inlet of a solar heat collecting plate (1), a hot water outlet of the solar heat collecting plate (1) is connected with a seawater or saline water hot water inlet at the upper side part of the pressure water tank (2), a seawater or saline water hot water outlet pipeline at the other side of the upper part of the pressure water tank (2) is connected to an inlet of a three-way mixing valve (6), an inlet at the other end of the three-way mixing valve (6) is connected with return water from a return water pump (5), an outlet pipeline of the three-way mixing valve (6) is connected with a spraying pipeline of a spraying chamber (4), air is introduced into the spraying chamber (4), a hot and wet air outlet of the spraying chamber (4) enters a condenser (8) through a fan (7), and residual return water in the spraying chamber (4) is connected with the return water pump (5) through a pipeline, fresh water is obtained by condensing outdoor air outside a condensation pipe of the condenser (8) and is collected in a fresh water pool (9).
2. The seawater or brine desalination system of claim 1, wherein: the solar heat collecting plate (1) can be replaced by a waste heat heating device.
3. The seawater or brine desalination system of claim 1, wherein: the seawater or brine can be replaced with an electrolyte salt solution that is free of volatile matter.
4. The seawater or brine desalination system of claim 1, wherein: the solar heat collecting plate (1) adopts natural circulation or forced circulation.
5. The seawater or brine desalination system of claim 1, wherein: and a pressure controller is arranged on the pressure water tank (2), and the pressure controller is electrically connected with the water replenishing pump (3).
6. The seawater or brine desalination system of claim 1, wherein: and a hot and humid air outlet of the spray chamber (4) is provided with a water baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210200143.1A CN114702091A (en) | 2022-03-02 | 2022-03-02 | Seawater or saline water desalination system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210200143.1A CN114702091A (en) | 2022-03-02 | 2022-03-02 | Seawater or saline water desalination system |
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| CN114702091A true CN114702091A (en) | 2022-07-05 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012239956A (en) * | 2011-05-17 | 2012-12-10 | Se Corp | Desalination apparatus and method for producing fresh water |
| CN203513315U (en) * | 2013-09-16 | 2014-04-02 | 威海源一节能科技有限公司 | Solar heat collection system capable of generating distilled water |
| CN203999019U (en) * | 2014-06-17 | 2014-12-10 | 山东阳光博士太阳能工程有限公司 | Solar seawater desalination Distallation systm |
| CN105152247A (en) * | 2015-08-07 | 2015-12-16 | 天津大学 | Seawater desalination system adopting combined operation of solar collector and seawater-source heat pump |
| CN111115932A (en) * | 2019-11-27 | 2020-05-08 | 昆明理工大学 | Non-focusing solar seawater or saline-alkali water desalting device |
| CN212832916U (en) * | 2020-08-04 | 2021-03-30 | 重庆科技学院 | High-salinity wastewater purification device |
-
2022
- 2022-03-02 CN CN202210200143.1A patent/CN114702091A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012239956A (en) * | 2011-05-17 | 2012-12-10 | Se Corp | Desalination apparatus and method for producing fresh water |
| CN203513315U (en) * | 2013-09-16 | 2014-04-02 | 威海源一节能科技有限公司 | Solar heat collection system capable of generating distilled water |
| CN203999019U (en) * | 2014-06-17 | 2014-12-10 | 山东阳光博士太阳能工程有限公司 | Solar seawater desalination Distallation systm |
| CN105152247A (en) * | 2015-08-07 | 2015-12-16 | 天津大学 | Seawater desalination system adopting combined operation of solar collector and seawater-source heat pump |
| CN111115932A (en) * | 2019-11-27 | 2020-05-08 | 昆明理工大学 | Non-focusing solar seawater or saline-alkali water desalting device |
| CN212832916U (en) * | 2020-08-04 | 2021-03-30 | 重庆科技学院 | High-salinity wastewater purification device |
Non-Patent Citations (1)
| Title |
|---|
| 方赵嵩编: "《人工环境学》", vol. 2022, 北京：机械工业出版社, pages: 165 - 166 * |
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Application publication date: 20220705 |