CN201737726U - Solar seawater-desalinating device adopting passive flash evaporation technique - Google Patents

Solar seawater-desalinating device adopting passive flash evaporation technique Download PDF

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Publication number
CN201737726U
CN201737726U CN2010201990843U CN201020199084U CN201737726U CN 201737726 U CN201737726 U CN 201737726U CN 2010201990843 U CN2010201990843 U CN 2010201990843U CN 201020199084 U CN201020199084 U CN 201020199084U CN 201737726 U CN201737726 U CN 201737726U
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China
Prior art keywords
seawater
condenser
flash
pipeline
solar
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Expired - Fee Related
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CN2010201990843U
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Chinese (zh)
Inventor
纪献兵
徐进良
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North China Electric Power University
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North China Electric Power University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • Y02A20/138Water desalination using renewable energy
    • Y02A20/142Solar thermal; Photovoltaics
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20Controlling water pollution; Waste water treatment
    • Y02A20/208Off-grid powered water treatment
    • Y02A20/212Solar-powered wastewater sewage treatment, e.g. spray evaporation

Abstract

The utility model belongs to the technical field of desalinating seawater by using solar energy, and particularly relates to a solar seawater-desalinating device adopting a passive flash evaporation technique. Uncondensed gas in a flash chamber and a condenser of the device is got rid off first before working, and the uncondensed gas generated in a seawater desalination project is continuously discharged by intermittently opening and closing a control valve in the working process; the flash chamber and the condenser are respectively connected with a ground seawater box and a fresh water box through pipelines, and pressure difference of seawater in the pipeline leads to the low pressure state of the flash chamber so that the boiling point of seawater in the flash chamber can be reduced to generate flash evaporation; after being heated in a heat exchanger, the seawater flows into the flash chamber by virtue of syphonage and then processed by passive flash evaporation, and the low pressure in the flash chamber does not need to be maintained by a vacuum pump. The solar seawater-desalinating device adopting the passive flash evaporation thoroughly utilizes the renewable and environment-friendly solar energy and has the advantages of high efficiency, low cost and convenient operation.

Description

The driven flash-evaporation solar seawater desalination device
Technical field
The utility model belongs to the technical field of utilizing sun power to carry out sea water desaltination, and particularly a kind of is thermal source with sun power, utilizes gravity pressure reduction to realize the device of the flash distillation desalination of seawater.
Background technology
Scientific technological advance all made significant progress aspect sun power, power-saving technology and the sea water desaltination to today, and its development trend is to utilize the energy reproducible, environmental protection as much as possible, and provides the fine resource to people under low cost.Because sun power has characteristics such as inexhaustible, nexhaustible, aboundresources, environmentally safe, therefore have wide utilization and DEVELOPMENT PROSPECT.In recent years, along with the development of heliotechnics, people begin to utilize sun power to carry out sea water desaltination.The desalination technology of comparative maturity mainly is multi-effect distilling, multi-effect flashing steam and membrane permeation at present.But above-mentioned technology mainly is applicable to extensive sea water desaltination, system complex, maintenance cost height, cost of investment height.
Compare with traditional sea water desaltination, utilize gravity pressure reduction to realize that the flash distillation desalination of the seawater mechanism such as simple, easy to operate, needing no vacuum pump that possesses skills keeps advantages such as low-pressure state in the flashing chamber, thereby determined this technology and device to have good popularization value.Simultaneously owing to be dissolved with non-condensable gases in the seawater, after seawater desalination system moves for some time, in flashing chamber and condenser, have gathering of non-condensable gases, if do not get rid of these gases, can cause the flashing chamber internal pressure to raise gradually, stop, therefore must increase the device of regularly getting rid of non-condensable gases until sea water desaltination, seawater desalination system can continually be moved, and this also is a gordian technique of this patent.
Summary of the invention
The purpose of this utility model is in order to solve existing in prior technology sea water desaltination cost height, pollutes heavy problem, provide a kind of efficient, cost is low, the solar energy sea water desalination apparatus of environmental protection.
The technical solution of the utility model is: the seawater pond, and the seawater pond links to each other with water storage box with seawater pipeline by water pump; The input terminus of condenser is connected with water storage box, the output terminal of condenser is connected with the input terminus of interchanger, the output terminal of interchanger is connected with flashing chamber, has pipeline to communicate between condenser and the flashing chamber, and interchanger is connected with solar energy collector by two pipelines; Solenoid coil is set respectively in condenser and the interchanger; The bottom of condenser is provided with water outlet, feeds fresh-water tank by the fresh water pipeline; The flashing chamber bottom is provided with the concentrated seawater outlet, feeds the concentrated seawater case by the concentrated seawater pipeline; The sidewall of condenser is provided with pipeline, merges into seawater and non-condensable gases discharge conduit feeding seawater pond with the bye-pass that water reservoir picks out.
Described solar energy collector is flat type solar heat collector or electron tubes type solar energy collector.
Described condenser is single-stage condenser or multi-stage condensing device; Described flashing chamber is single stage flash chamber or multistage flash evaporation chamber.
Described solar energy collector, flashing chamber, condenser and water storage box are not less than 8m apart from ground, and keep airtight.
The drainage valve is set respectively on described water reservoir and the condenser.
On two branch roads, fresh water pipeline and the concentrated seawater pipeline of described seawater and non-condensable gases discharge conduit by-pass valve control is set respectively.
The beneficial effects of the utility model are: this device utilizes gravity pressure reduction to realize the flash distillation desalination of seawater, do not need vacuum pump to keep the interior low-pressure state of flashing chamber, and in the flashing chamber seawater replenish and solar energy collector in the circulation of liquid all realize by natural convection, therefore reduce the cost of investment of sea water desalinating plant and reduced energy consumption, had good popularization value; In the device operational process, can regularly get rid of non-condensable gases, make the continual operation of seawater desalination system energy, improve use value and working efficiency; Simple in structure, easy to operate, improve thermo-efficiency and reduced cost of investment, also, further research and utilization sun power provides good means and method for carrying out sea water desaltination.
Description of drawings
Fig. 1 is a driven flash-evaporation solar seawater desalination device synoptic diagram of the present utility model
Reference numeral:
1-seawater pond; The 2-water pump; The 3-water reservoir; The 4-condenser; The 5-flashing chamber; The 6-interchanger;
The 7-solar energy collector; 8-concentrated seawater case; The 9-fresh-water tank; The 10-seawater pipeline;
11-seawater and non-condensable gases discharge conduit; 12-fresh water pipeline; 13-concentrated seawater pipeline;
The 14-water reservoir is drained valve; The 15-condenser is drained valve; 16-first by-pass valve control;
17-second by-pass valve control; 18-the 3rd by-pass valve control; 19-the 4th by-pass valve control;
20-the 5th by-pass valve control; The 21-solenoid coil.
Embodiment
The utility model provides a kind of driven flash-evaporation solar seawater desalination device, below in conjunction with the drawings and specific embodiments the utility model is described further.
Fig. 1 is a structural representation of the present utility model.This device is provided with seawater pond 1, and seawater pond 1 links to each other with water storage box 3 with seawater pipeline 10 by water pump 2; The input terminus of condenser 4 is connected with water storage box 3, the output terminal of condenser 4 is connected with the input terminus of interchanger 6, the output terminal of interchanger 6 is connected with flashing chamber 5, has pipeline to communicate between condenser 4 and the flashing chamber 5, and interchanger 6 is connected with solar energy collector 7 by two pipelines; In condenser 4 and the interchanger 6 solenoid coil 21 is set respectively; The bottom of condenser 4 is provided with water outlet, feeds fresh-water tank 9 by fresh water pipeline 12; Flashing chamber 5 bottoms are provided with the concentrated seawater outlet, feed concentrated seawater case 8 by concentrated seawater pipeline 13; The sidewall of condenser 4 is provided with pipeline, merges into seawater and non-condensable gases discharge conduit 11 feeding seawater ponds 1 with the bye-pass that water reservoir 3 picks out.Wherein, solar energy collector 7, flashing chamber 5, condenser 4 and water storage box 3 be apart from ground 10m, and keep airtight.Condenser 4 has the effect of seawater being carried out preheating and condensed steam, and the spiral tube 21 in the condenser 4 is the parts that realize heat exchange.7 of solar energy collectors are collected sun power, at interchanger 6 internal heating seawater, the seawater that temperature raises is siphoned into and carries out flash distillation in the flashing chamber 5, the steam that flash distillation produces condensation in condenser 4 forms fresh water, fresh water flows in the fresh-water tank 9 by fresh water pipeline 12, and the concentrated seawater that produces after the flash distillation then enters in the concentrated seawater case 8 by concentrated seawater pipeline 13.
Before the sea water desalinating plant start-up course, close the first by-pass valve control 16-the 5th by-pass valve control 20, flashing chamber 5 and condenser 4 are vacuumized, condenser is drained valve 15 for vacuumizing the excretory interface, and sea water desalinating plant then is in closing condition after starting; Open the 4th by-pass valve control 19 and the 5th by-pass valve control 20 then, owing to be in low-pressure state in flashing chamber 5 and the condenser 4, so concentrated seawater and fresh water can rise concentrated seawater pipeline 13 and fresh water pipeline 12 in respectively, and is poor with ground formation certain height.Atmospheric pressure value in the flashing chamber 5 equals the poor of pressure that barometric point and concentrated seawater form in concentrated seawater pipeline 13.Flashing chamber 5 is under low-pressure state, flash distillation can take place in the higher seawater of temperature on the one hand, seawater in the siphon water reservoir 3 enters flashing chamber 5 through condenser 4 and interchanger 6 on the other hand, realize preheating and heating on the way, the operation of water all leans on the natural circulation of liquid to realize in this process and the solar energy collector 7, does not need extra power.Water reservoir is drained valve 14 and is connected with ambient atmosphere at work, keeps water reservoir 3 and is in atmosphere pressure state.18 controls of the 3rd by-pass valve control enter the seawater amount in the flashing chamber 5.
In desalting process, the exclusion process of non-condensable gases is: open first by-pass valve control 16 earlier, make in seawater and the non-condensable gases discharge conduit 11 and be full of seawater, close first by-pass valve control 16 then, open second by-pass valve control 17, this moment, seawater can flow downward, the part non-condensable gases enters seawater and non-condensable gases discharge conduit 11, and then close second by-pass valve control 17, opening first by-pass valve control 16 allows seawater flow into from water reservoir 3, continual the carrying out of going round and beginning again like this, thus realize getting rid of non-condensable gases in condenser 4 and the flashing chamber 5.
Flashing chamber 5 can be a single-stage, and is also multistage.Condenser 4 can use separately, also can be divided into what and flashing chamber common use that be connected together.Only provide condenser 4 and flashing chamber 5 in the present embodiment and be the situation of single-stage
Solar energy collector 7 both can be a flat plate collector, also can be valve tube or groove type heat collector.Use flat-plate collector in the present embodiment.
This sea water desalinating plant both can use separately, also can mix use with other sea water desaltination mode.
Above-listed detailed description is specifying at the utility model possible embodiments, the sea water desaltination of this system belongs to passive type, remove process in its circulation from the seawater pond to water reservoir, all the other processes do not need power, thereby make desalting process realize the operation operation of efficient, low cost and less energy-consumption.

Claims (6)

1. driven flash-evaporation solar seawater desalination device is characterized in that: seawater pond (1), and seawater pond (1) links to each other with water storage box (3) with seawater pipeline (10) by water pump (2); The input terminus of condenser (4) is connected with water storage box (3), the output terminal of condenser (4) is connected with the input terminus of interchanger (6), the output terminal of interchanger (6) is connected with flashing chamber (5), have pipeline to communicate between condenser (4) and the flashing chamber (5), interchanger (6) is connected with solar energy collector (7) by two pipelines; In condenser (4) and the interchanger (6) solenoid coil (21) is set respectively; The bottom of condenser (4) is provided with water outlet, feeds fresh-water tank (9) by fresh water pipeline (12); Flashing chamber (5) bottom is provided with the concentrated seawater outlet, feeds concentrated seawater case (8) by concentrated seawater pipeline (13); The sidewall of condenser (4) is provided with pipeline, merges into seawater and non-condensable gases discharge conduit (11) feeding seawater pond (1) with the bye-pass that water reservoir (3) picks out.
2. a kind of driven flash-evaporation solar seawater desalination device according to claim 1 is characterized in that: described solar energy collector (7) is flat type solar heat collector or electron tubes type solar energy collector.
3. a kind of driven flash-evaporation solar seawater desalination device according to claim 1 is characterized in that: described condenser (4) is single-stage condenser or multi-stage condensing device; Described flashing chamber (5) is single stage flash chamber or multistage flash evaporation chamber.
4. a kind of driven flash-evaporation solar seawater desalination device according to claim 1 is characterized in that: described solar energy collector (7), flashing chamber (5), condenser (4) and water storage box (3) are not less than 8m apart from ground, and keep airtight.
5. a kind of driven flash-evaporation solar seawater desalination device according to claim 1 is characterized in that: on described water reservoir (3) and the condenser (4) the drainage valve is set respectively.
6. a kind of driven flash-evaporation solar seawater desalination device according to claim 1 is characterized in that: on two branch roads of described seawater and non-condensable gases discharge conduit (11), fresh water pipeline (12) and the concentrated seawater pipeline (13) by-pass valve control is set respectively.
CN2010201990843U 2010-05-18 2010-05-18 Solar seawater-desalinating device adopting passive flash evaporation technique Expired - Fee Related CN201737726U (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101838024A (en) * 2010-05-18 2010-09-22 华北电力大学 Driven flash-evaporation solar seawater desalination method and device
CN102583608A (en) * 2012-02-16 2012-07-18 西安交通大学 Ejection type solar seawater desalination device
CN103011320A (en) * 2012-12-18 2013-04-03 上海交通大学 Small high-temperature multistage regenerative type vacuum glass tube solar seawater desalting device
CN103058302A (en) * 2013-01-21 2013-04-24 杭州华达喷射真空设备有限公司 Integrated solar seawater self-circulation desalting device and self-circulation desalting method
CN103172131A (en) * 2013-04-11 2013-06-26 南京航空航天大学 Water-cooled sea water desalination flash system by thermoelectric heat pump and sea water desalination method
CN103206275A (en) * 2012-09-19 2013-07-17 广西南宁市派宇能源科技开发有限公司 Light, heat and electricity converting device
CN104058474A (en) * 2014-03-31 2014-09-24 大连理工大学 Natural circulating solar seawater desalination device employing pulse flash evaporation
CN106403633A (en) * 2016-09-19 2017-02-15 中冶南方工程技术有限公司 Dead-weight type vacuum waste heat recycling device and waste heat recycling method thereof
WO2019051313A1 (en) * 2017-09-08 2019-03-14 Northrup, Incorporated Self-regulating vacuum still
CN111559770A (en) * 2020-05-08 2020-08-21 李方 Heat pipe type seawater desalination device

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101838024B (en) * 2010-05-18 2012-02-08 华北电力大学 Driven flash-evaporation solar seawater desalination method and device
CN101838024A (en) * 2010-05-18 2010-09-22 华北电力大学 Driven flash-evaporation solar seawater desalination method and device
CN102583608A (en) * 2012-02-16 2012-07-18 西安交通大学 Ejection type solar seawater desalination device
CN102583608B (en) * 2012-02-16 2014-07-02 西安交通大学 Ejection type solar seawater desalination device
CN103206275A (en) * 2012-09-19 2013-07-17 广西南宁市派宇能源科技开发有限公司 Light, heat and electricity converting device
CN103011320A (en) * 2012-12-18 2013-04-03 上海交通大学 Small high-temperature multistage regenerative type vacuum glass tube solar seawater desalting device
CN103011320B (en) * 2012-12-18 2014-03-26 上海交通大学 Small high-temperature multistage regenerative type vacuum glass tube solar seawater desalting device
CN103058302A (en) * 2013-01-21 2013-04-24 杭州华达喷射真空设备有限公司 Integrated solar seawater self-circulation desalting device and self-circulation desalting method
CN103058302B (en) * 2013-01-21 2014-07-16 杭州华达喷射真空设备有限公司 Integrated solar seawater self-circulation desalting device and self-circulation desalting method
CN103172131A (en) * 2013-04-11 2013-06-26 南京航空航天大学 Water-cooled sea water desalination flash system by thermoelectric heat pump and sea water desalination method
CN104058474A (en) * 2014-03-31 2014-09-24 大连理工大学 Natural circulating solar seawater desalination device employing pulse flash evaporation
CN104058474B (en) * 2014-03-31 2016-08-24 大连理工大学 Pulsation flash distillation Natural Circulation solar energy sea water desalination apparatus
CN106403633A (en) * 2016-09-19 2017-02-15 中冶南方工程技术有限公司 Dead-weight type vacuum waste heat recycling device and waste heat recycling method thereof
WO2019051313A1 (en) * 2017-09-08 2019-03-14 Northrup, Incorporated Self-regulating vacuum still
CN111559770A (en) * 2020-05-08 2020-08-21 李方 Heat pipe type seawater desalination device

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Granted publication date: 20110209

Termination date: 20130518