CN103663837A - Seawater desalination system and seawater desalination method - Google Patents
Seawater desalination system and seawater desalination method Download PDFInfo
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- CN103663837A CN103663837A CN201310740079.7A CN201310740079A CN103663837A CN 103663837 A CN103663837 A CN 103663837A CN 201310740079 A CN201310740079 A CN 201310740079A CN 103663837 A CN103663837 A CN 103663837A
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- seawater
- fresh water
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- desalination device
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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
- Y02A20/131—Reverse-osmosis
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention discloses a seawater desalination system and a seawater desalination method. The seawater desalination method comprises the following steps of providing seawater to be desalinated for an antiosmosis desalination device to generate fresh water; providing partial or all fresh water for a solar thermal collecting device and heating the fresh water; exchanging heat between the heated fresh water and the seawater to be desalinated in a heat exchanger to make the temperature of the seawater to be desalinated rise, cyclically provide cooled fresh water for the solar thermal collecting device and provide the heated seawater to be desalinated for the antiosmosis desalination device to generate fresh water. According to the seawater desalination system and the seawater desalination method, the seawater is subjected to heat exchange and temperature rise and provided for the antiosmosis desalination device, the antiosmosis efficiency is improved, and the energy consumption can be reduced and the water generating quality can be improved further.
Description
Technical field
The present invention relates to a kind of seawater desalination system and method for desalting seawater.
Background technology
Reverse-osmosis desalination device is a kind of conventional sea water desaltination means, seawater is after high-pressure pump pressurization, through reverse osmosis membrane assembly, water through reverse osmosis membrane is fresh water, all the other not permeate portion be concentrated seawater, concentrated seawater directly boosts seawater to be diluted through energy recycle device, then after the loss of topping-up pump compensatory pressure, with the sea water mixing of high-pressure pump pressurization, come and go through reverse osmosis membrane module.
Seawater temperature has very important impact to reverse osmosis efficiency, general seawater temperature 20 ℃ above more suitable the best be 20～30 ℃, yet because the geographical position on island is different with weather condition, the water temperature of island periphery also varies, conventionally all lower than 20 ℃, affect reverse osmosis efficiency, and energy consumption is high, effluent characteristics does not reach expection requirement.
Summary of the invention
The object of the present invention is to provide a kind of method for desalting seawater and seawater desalination system, to improve the reverse osmosis efficiency of seawater.
For this reason, the invention provides a kind of method for desalting seawater, comprise the following steps: utilize solar energy heat collector to heat fresh water; By the fresh water after heating and seawater to make heat exchange to be diluted, seawater to be diluted is heated up; And by the sea water supply reverse-osmosis desalination device to be diluted after heating up to produce fresh water.
Further, above-mentioned method for desalting seawater also comprises that part or all that make fresh water that reverse-osmosis desalination device produces offers the step of solar energy heat collector.
Further, above-mentioned method for desalting seawater also comprises and utilizes photovoltaic system to provide electric energy to described reverse osmosis desalination device.
A method for desalting seawater, comprises the following steps: seawater to be diluted is offered to reverse-osmosis desalination device to produce fresh water according to a further aspect in the invention; Part or all of fresh water offered to solar energy heat collector to heat; By the fresh water after heating and seawater heat exchange in interchanger to be diluted, seawater to be diluted is heated up, and make the fresh water circulation of cooling offer solar energy heat collector; And the sea water supply reverse-osmosis desalination device to be diluted after making to heat up is to produce fresh water.
Further, above-mentioned method for desalting seawater also comprises and utilizes photovoltaic system that the step of electric energy is provided to reverse osmosis desalination device.
Further, above-mentioned method for desalting seawater also comprises when when solar energy heat collector is taken hot water, the fresh water of reverse-osmosis desalination device generation being supplemented to the step to solar energy heat collector.
The present invention also provides a kind of seawater desalination system, comprises reverse-osmosis desalination device, also comprises: solar energy heat collector, for heating fresh water; Heat exchanger, be connected with solar energy heat collector pipeline, for by heating fresh water and seawater to make heat exchange to be diluted, wherein, heat exchanger is connected with reverse-osmosis desalination device pipeline, so that seawater to be diluted enters reverse-osmosis desalination device after the heat exchange of heat exchanger.
Further, above-mentioned solar energy heat collector comprises solar vacuum heat-collecting pipe group and water tank.
Further, above-mentioned seawater desalination system also comprises photovoltaic system, is electrically connected to provide electric energy with reverse-osmosis desalination device.
Further, above-mentioned seawater desalination system also comprises moisturizing pipeline, and wherein, one end of moisturizing pipeline is connected with the water outlet of reverse-osmosis desalination device, and the other end is connected with the fresh water entrance of solar energy heat collector.
According to seawater desalination system of the present invention and method for desalting seawater, after being heated up, seawater to make heat exchange offers again reverse-osmosis desalination device, and improved reverse osmosis efficiency, and then can reduce energy consumption and put forward high yield water quality.
Except object described above, feature and advantage, other object, feature and advantage that the present invention has, be described in further detail in connection with accompanying drawing.
Accompanying drawing explanation
Form this specification sheets a part, for further understanding accompanying drawing of the present invention, show the preferred embodiments of the present invention, and be used for illustrating principle of the present invention together with specification sheets.In figure:
Fig. 1 is the schematic diagram according to seawater desalination system of the present invention;
Fig. 2 is according to the schema of the first embodiment of method for desalting seawater of the present invention; And
Fig. 3 is according to the schema of the second embodiment of method for desalting seawater of the present invention.
Description of reference numerals
10, reverse-osmosis desalination device; 11, high-pressure pump;
12, reverse osmosis membrane group; 13, energy recycle device;
20, solar energy heat collector; 21, water tank;
22, vacuum heat collection pipe group; 30, heat exchanger;
40, photovoltaic system; 41, solar module;
42, secondary battery; 51, moisturizing pipeline.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Fig. 1 is the schematic diagram according to seawater desalination system of the present invention.As shown in Figure 1, comprise reverse-osmosis desalination device 10; Solar energy heat collector 20, for the fresh water heating; Heat exchanger 30, is connected with solar energy heat collector 20 pipelines, for by heating fresh water and seawater to make heat exchange to be diluted; And photovoltaic system 40, be electrically connected to provide electric energy with reverse-osmosis desalination device 10; Wherein, heat exchanger 30 is connected with reverse-osmosis desalination device 10 pipelines, so that seawater to be diluted enters reverse-osmosis desalination device 10 after the heat exchange of heat exchanger 30, the water outlet of reverse-osmosis desalination device is connected by moisturizing pipeline 51 with the fresh water entrance of solar energy heat collector, to supplement hot water to solar energy heat collector 20.
Seawater desalination system of the present invention offers reverse-osmosis desalination device after seawater to make heat exchange is heated up again, has improved reverse osmosis efficiency, and then can reduce energy and put forward high yield water quality.In addition, seawater desalination system of the present invention can provide the multiple efficacies such as fresh water, hot water, generating, is adapted on the island away from continent using, to realize the comprehensive utilization of solar energy resources.
Preferably, above-mentioned solar energy heat collector 20 comprises solar vacuum heat-collecting pipe group 22 and water tank 21, not only can be used for heating seawater, also can supply life required hot water.
Preferably, heat exchanger 30 comprises spiral interior hot-water line and be enclosed within the outer tube outside interior hot-water line, and outer tube is cold water pipe, so can increase heat interchanging area, and cold water pipe easily forms turbulent flow simultaneously, increases the thermal equilibrium of cold water pipe.Rear end desalination process to Mare Frigoris water, reduces Pressure Drop simultaneously.
Preferably, photovoltaic system 40 comprises solar module 41 and secondary battery 42, to provide power to reverse-osmosis desalination device 10, typically, this reverse-osmosis desalination device 10 comprises high-pressure pump 11, reverse osmosis membrane group 12, energy recycle device 13, it connects configuration and mode of operation is known, and therefore not to repeat here.
Fig. 2 is according to the schema of the first embodiment of method for desalting seawater of the present invention.As shown in Figure 2, this method for desalting seawater comprises: step S11, utilizes solar energy heat collector to heat fresh water; Step S13, by the fresh water after heating and seawater to make heat exchange to be diluted, heats up seawater to be diluted; Step S15, by the sea water supply reverse-osmosis desalination device to be diluted after heating up to produce fresh water; And step S17, part or all that makes fresh water that reverse-osmosis desalination device produces offers solar energy heat collector.
Method for desalting seawater of the present invention offers reverse-osmosis desalination device after seawater to make heat exchange is heated up again, has improved reverse osmosis efficiency, and then can reduce energy and put forward high yield water quality.
Preferably, in step S15, utilize photovoltaic system to provide electric energy to reverse-osmosis desalination device, to realize electric energy self-supporting.
Fig. 3 is according to the schema of the second embodiment of method for desalting seawater of the present invention, and as shown in Figure 3, this method for desalting seawater comprises: step S21, offers reverse-osmosis desalination device to produce fresh water by seawater to be diluted; Step S23, offers solar energy heat collector to heat by part or all of fresh water; Step S25, by the fresh water after heating and seawater heat exchange in interchanger to be diluted, heats up seawater to be diluted, and makes the fresh water circulation of cooling offer solar energy heat collector; Step S27, makes the seawater to be diluted after heating up supply with reverse-osmosis desalination device to produce fresh water as normality; And step S29 is when when solar energy heat collector is taken hot water, the fresh water of reverse-osmosis desalination device generation being supplemented to solar energy heat collector.
Method for desalting seawater of the present invention adopts the seawater of not heating to desalinate at the beginning, and the fresh water of acquisition is offered to solar energy heat collector heat, and then by heat exchange, obtain the seawater of heat temperature raising, the seawater that so can obtain intensification carries out desalination by reverse osmosis, has improved desalination by reverse osmosis efficiency.Compare with the first embodiment, use the system of the method for desalting seawater of the present embodiment to have and start advantage easily, practicality is very strong.
Preferably, in above-mentioned steps S21 and step S29, utilize photovoltaic system to provide electric energy to reverse osmosis desalination device, to realize electric energy self-supporting.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a method for desalting seawater, is characterized in that, comprises the following steps:
Utilize solar energy heat collector to heat fresh water;
By the fresh water after heating and seawater to make heat exchange to be diluted, described seawater to be diluted is heated up; And
By the sea water supply reverse-osmosis desalination device described to be diluted after heating up to produce fresh water.
2. method for desalting seawater according to claim 1, is characterized in that, also comprises that part or all that make fresh water that described reverse-osmosis desalination device produces offers the step of described solar energy heat collector.
3. method for desalting seawater according to claim 1, is characterized in that, also comprises and utilizes photovoltaic system that the step of electric energy is provided to described reverse-osmosis desalination device.
4. a method for desalting seawater, comprises the following steps:
Seawater to be diluted is offered to reverse-osmosis desalination device to produce fresh water;
Part or all of described fresh water offered to solar energy heat collector to heat;
By the fresh water after heating and seawater heat exchange in interchanger to be diluted, seawater to be diluted is heated up, and make the described fresh water circulation of cooling offer described solar energy heat collector; And
Make described in the sea water supply described to be diluted after heating up reverse-osmosis desalination device to produce fresh water.
5. method for desalting seawater according to claim 4, is characterized in that, also comprises and utilizes photovoltaic system that the step of electric energy is provided to described reverse osmosis desalination device.
6. method for desalting seawater according to claim 4, is characterized in that, also comprises when when described solar energy heat collector is taken hot water, the fresh water of described reverse-osmosis desalination device generation being supplemented to the step to described solar energy heat collector.
7. a seawater desalination system, comprises reverse-osmosis desalination device, it is characterized in that, also comprises:
Solar energy heat collector, for heating fresh water;
Heat exchanger, is connected with described solar energy heat collector pipeline, for by the fresh water of described heating and seawater to make heat exchange to be diluted,
Wherein, described heat exchanger is connected with described reverse-osmosis desalination device pipeline, so that seawater to be diluted enters described reverse-osmosis desalination device after the heat exchange of described heat exchanger.
8. seawater desalination system according to claim 7, is characterized in that, described solar energy heat collector comprises solar vacuum heat-collecting pipe group and water tank.
9. seawater desalination system according to claim 7, is characterized in that, also comprises photovoltaic system, is electrically connected to provide electric energy with described reverse-osmosis desalination device.
10. seawater desalination system according to claim 7, it is characterized in that, also comprise moisturizing pipeline, wherein, one end of described moisturizing pipeline is connected with the water outlet of described reverse-osmosis desalination device, and the other end is connected with the fresh water entrance of described solar energy heat collector.
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| CN201310740079.7A CN103663837A (en) | 2013-12-26 | 2013-12-26 | Seawater desalination system and seawater desalination method |
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| CN201310740079.7A CN103663837A (en) | 2013-12-26 | 2013-12-26 | Seawater desalination system and seawater desalination method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105668898A (en) * | 2016-04-08 | 2016-06-15 | 范海燕 | System for seawater desalination through geothermal resources and treatment technology thereof |
| CN105753104A (en) * | 2016-04-08 | 2016-07-13 | 范海燕 | System and technology for carrying out sea water desalination and generating at same time by utilizing geothermal resource |
| CN108751469A (en) * | 2018-06-22 | 2018-11-06 | 西北工业大学 | A kind of photovoltaic, photo-thermal, reverse osmosis seawater desalination system |
| CN109526686A (en) * | 2018-12-17 | 2019-03-29 | 桂林理工大学 | A kind of irrigation method for extra large Rice Cropping |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105668898A (en) * | 2016-04-08 | 2016-06-15 | 范海燕 | System for seawater desalination through geothermal resources and treatment technology thereof |
| CN105753104A (en) * | 2016-04-08 | 2016-07-13 | 范海燕 | System and technology for carrying out sea water desalination and generating at same time by utilizing geothermal resource |
| CN105668898B (en) * | 2016-04-08 | 2018-04-17 | 天津融渌众乐科技有限公司 | A kind of system and its treatment process that sea water desalination processing is carried out using geothermal energy resources |
| CN108751469A (en) * | 2018-06-22 | 2018-11-06 | 西北工业大学 | A kind of photovoltaic, photo-thermal, reverse osmosis seawater desalination system |
| CN109526686A (en) * | 2018-12-17 | 2019-03-29 | 桂林理工大学 | A kind of irrigation method for extra large Rice Cropping |
| CN109526686B (en) * | 2018-12-17 | 2021-04-09 | 桂林理工大学 | Irrigation method for sea rice planting |
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Application publication date: 20140326 |