CN102381735B - Semi-dry process air humidifying and dehumidifying type seawater desalinating system and method - Google Patents
Semi-dry process air humidifying and dehumidifying type seawater desalinating system and method Download PDFInfo
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- CN102381735B CN102381735B CN201110304566XA CN201110304566A CN102381735B CN 102381735 B CN102381735 B CN 102381735B CN 201110304566X A CN201110304566X A CN 201110304566XA CN 201110304566 A CN201110304566 A CN 201110304566A CN 102381735 B CN102381735 B CN 102381735B
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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
- Y02A20/142—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)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a semi-dry process air humidifying and dehumidifying type seawater desalinating system and method utilizing solar energy, and belongs to the technical field of seawater desalination. The system comprises a solar air heat collector, a jetting bed evaporator, a bag dust remover, a horizontal-tube falling-film condenser and a steam-water separator, wherein the output end of the solar air heat collector is connected with a bottom spray nozzle of the jetting bed evaporator; a seawater input source is connected with a top seawater inlet guide pipe of the jetting bed evaporator; the output end of the jetting bed evaporator is sequentially connected with the bag dust remover, the horizontal-tube falling-film condenser and the steam-water separator; and the output end of the steam-water separator is used for outputting freshwater. The system runs under normal pressure without need of a vacuum pump; the jetting bed evaporator is used in the system to enhance air moisture absorption process and improve the seawater evaporation efficiency; the horizontal-tube falling-film condenser is used to improve the heat exchange efficiency of the condenser; and a semi-dry process evaporation flow is adopted, thus a concentrated saline storage or circulation device is not needed and salt particles can be recovered by the bag dust remover.
Description
Technical field
The present invention relates to a kind of semidrying gas humidification dehumidification type seawater desalination system and method for utilizing sun power, belong to field of sea water desalting technology.
Background technology
Present industrial applications the most widely desalination technology comprises multistage flash evaporation method, multiple-effect evaporation method and reverse osmosis method.These methods all will consume a large amount of fuel or electric power resource.Utilize renewable energy source-sun power to carry out sea water desaltination, the energy and the environmental problem that can avoid a large amount of fuel and electric power resource consumption to bring.But sun power is a kind of low-quality heat energy, if do not adopt complicated beam condensing unit, sun power only can be heated to working medium certain temperature.When being used for the straight run distillation seawater, need many vacuum pumps of configuration just can finish still-process.Researches On Humidification-dehumidification Seawater Desalination Technology utilizes that the gas saturated humidity is poor carries out sea water desaltination, can effectively utilize inferior solar thermal energy.
Find through the retrieval to prior art, title " spraying propulsion ventilation evaporation-condensation formula fresh-water generator " (number of patent application is CN00109939.6), " utilizing the method for desalting seawater of air saturation psychrometric difference " (number of patent application is CN03144279.X), " spray evaporation air moistening dehumidification type solar energy sea water desalination apparatus " (number of patent application is CN201010509740.X) etc., these patents are all carried out sea water desaltination based on the air humidification-process of drying, technical feasible, but all have evaporation of seawater or condensation efficiency problem on the low side.Improve heat transfer, mass transfer coefficient between air and seawater, and the evaporation area that increases seawater is to improve the key of vaporization efficiency, and the thermal resistance that reduces between wet air and low-temperature receiver is to improve the key of water vapor condensation efficient.In addition, some adopts extraneous recirculated water to make low-temperature receiver to above technology in the water vapor condensation process, cause heat waste, and some is in order to utilize this part heat of condensation, has increased several independently interchanger so that system is too complicated.Seawater all can not evaporate fully in the vaporizer of above technology, all is provided with strong brine storer or circulation line, the waste that this causes strong brine to carry heat on the one hand, and pipeline subjects to corrosion on the other hand.The part technology is used the nozzle atomization seawater in order to improve the evaporation of seawater area, but considers the corrodibility of seawater, and nozzle easily damages.
Summary of the invention
For the defective that exists in the above-mentioned prior art, the object of the invention is to propose a kind of semidrying gas humidification dehumidification type seawater desalination system and method for utilizing sun power, this system can move under normal pressure, need not vacuum pump, need not the high density seawater stores or circulation device, and can and generate fresh water amount, recyclable salt grain according to solar energy air heat collector temperature and both air flow modulation evaporator outlet wet air temperature.
In order to realize the foregoing invention purpose, system of the present invention is achieved through the following technical solutions:
Semidrying gas humidification dehumidification type seawater desalination system, comprise solar energy air heat collector, spouted bed vaporizer, sack cleaner, horizontal tube falling film condenser and steam separator, spouted bed vaporizer comprises housing, air intlet nozzle, sea intake conduit, bed material particle and wet air delivery channel, wherein, described air intlet nozzle is fixedly installed on the bottom in the housing, and its input terminus is connected with the output terminal of solar energy air heat collector; Described sea intake conduit is arranged at the top in the housing, and is connected with the seawater input source; Described bed material particle is positioned over bottom in the housing; Described wet air delivery channel is arranged at housing top, and its output terminal connects sack cleaner, horizontal tube falling film condenser and steam separator successively; The output terminal output fresh water of described steam separator, its gas output end connects induced draft fan in order to air flow power to be provided.
Wherein, spouted bed evaporator outlet end connects sack cleaner in order to collect the solid granulates in the wet air, and major part is the salt grain; Horizontal tube falling film condenser output terminal connects gas-liquid separator in order to separate fresh.
Described spouted bed evaporator shell adopts stainless material to make, and the outside is wrapped up by the asbestos thermal insulation layer.Spouted bed vaporizer is chosen the quartz sand particle of particle diameter about 350 μ m and is made the bed material, and particle is separated into drop by hot air fluidised with the import seawater, and drop is attached on its surface evaporates.The contact area that particle has enlarged air and seawater to dispersion and the adhesion of seawater, and improved the residence time of sea water drops in spouted bed vaporizer, simultaneously spouted fluidized in bed of particle causes heat transfer, mass transfer coefficient between gas-liquid to be greatly improved, thereby improved evaporation of seawater efficient.Therefore seawater fully evaporation in spouted bed vaporizer need not to arrange high density seawater storing unit.
Described horizontal tube falling film condenser shell side leads to wet air, tube side is divided into up and down two independent sectors, the maritime water of upper part, seawater is set into and out of port, lower part blowing air arranges air into and out of port, wherein, sea intake is connected with the seawater storage tank, and seawer outlet is connected with spouted bed vaporizer seawater conduit; Gas feed is connected with gas blower, and pneumatic outlet is connected with solar energy air heat collector.Wet air skims over the condenser shell side, and in transverse tube outer wall condensation heat release, this horizontal tube falling film condensing mode effectively reduces the inside and outside thermal-conduction resistance of pipe, increases the outer convection transfer rate of pipe, so that the heat release condensation in the condenser is very efficient.
Method of the present invention is to carry out in the following manner work: the high temperature air from solar energy air heat collector enters spouted bed vaporizer by the air intlet nozzle, and the fluidized bed material particle also evaporates seawater; Bed material particle after seawater is fluidized is separated into drop, part is attached on the evaporation of bed material particle surface, part direct evaporation, the particle strenuous exercise in bed has strengthened evaporation area and the vaporization efficiency of seawater, and has improved the residence time of seawater in vaporizer; Air after the moisture absorption at first enters sack cleaner except desalting grain, then enter the horizontal tube falling film condenser condenses, this horizontal tube falling film condensing mode effectively reduces the inside and outside thermal-conduction resistance of pipe, increases the outer convection transfer rate of pipe, so that the heat release condensation process is very efficient; The heat of condensation of water vapor is used for preheating gas and seawater simultaneously, can not cause the waste of heat.
The present invention utilizes spouted bed vaporizer and horizontal tube falling film condenser that sufficient reinforcement has been carried out in air moisture absorption and dehumidification process.Adopt the semidry process flow process, seawater is fully evaporation in vaporizer, has avoided because the corrosion of pipeline, water pump and storage receptacle that the strong brine circulation causes.And the use of sack cleaner avoided in the wet air salt grain to the abrasion and corrosion of horizontal tube falling film condenser, and recyclable salt grain.
Description of drawings
Fig. 1 is the structure iron of semidrying gas humidification dehumidification type seawater desalination system of the present invention.
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are elaborated.The present embodiment is implemented under take technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
The semidrying gas humidification dehumidification type seawater desalination system that the present invention proposes, as shown in Figure 1.The present embodiment comprises: solar energy air heat collector 1, spouted bed vaporizer 2, sack cleaner 3, horizontal tube falling film condenser 4 and steam separator 5, wherein: the output terminal of solar energy air heat collector 1 is connected with spouted bed vaporizer 2 bottom nozzles, the seawater input source is connected with spouted bed vaporizer 2 top sea intake conduits, and the output terminal of spouted bed vaporizer 2 connects sack cleaner 3, horizontal tube falling film condenser 4 and steam separator 5 successively.The output terminal output fresh water of steam separator 5.
Solar energy air heat collector 1 is for solar collecting device and heat energy is provided.
Spouted bed vaporizer 2 comprises: housing 11 and bed material 12.Housing 11 adopts stainless material to make, and the outside is wrapped up by the asbestos thermal insulation layer.Choose the quartz sand particle of medium particle diameter (about 350 μ m) and make bed material 12, bed material 12 places housing 11 bottoms.Bed material 12 is separated into drop by hot air fluidised with the import seawater, and drop is attached on its surface evaporates.
On the sea intake conduit at spouted bed vaporizer 2 tops flow director 6 is set, in order to control import seawater amount.
Spouted bed vaporizer 2 exit end connect sack cleaner 3, and in order to collect the solid granulates in the wet air, major part is the salt grain.
Horizontal tube falling film condenser 4 shell sides lead to wet air, and tube side is divided into up and down two independent sectors, and the maritime water of upper part arranges seawater into and out of port, and lower part blowing air arranges air into and out of port.Sea intake is connected with sea-water pump 7, and seawer outlet is connected with spouted bed vaporizer 2 sea intake conduits.Gas feed is connected with gas blower 8, and pneumatic outlet is connected with solar energy air heat collector 1.Wet air skims over the condenser shell side, in transverse tube outer wall condensation heat release.
Horizontal tube falling film condenser 4 output terminals connect gas-liquid separator 5 in order to divided gas flow and fresh water, and fresh water is stored in the fresh water torage tank 10, and gas is drawn by induced draft fan 9.
The present embodiment carries out work in the following manner: the high temperature air from solar energy air heat collector 1 enters spouted bed vaporizer 2 by nozzle, and fluidized bed material also evaporates seawater.Bed material after seawater is fluidized is separated into drop, and part is attached on the surface evaporation of bed material, part direct evaporation.Air after the moisture absorption at first enters sack cleaner 3 except desalting grain, then enters 4 condensations of horizontal tube falling film condenser.This horizontal tube falling film condensing mode effectively reduces the inside and outside thermal-conduction resistance of pipe, increases the outer convection transfer rate of pipe, so that the heat release condensation process is very efficient.The heat of condensation of water vapor is used for preheating gas and seawater simultaneously, can not cause the waste of heat.
Claims (6)
1. semidrying gas humidification dehumidification type seawater desalination system, comprise solar energy air heat collector, spouted bed vaporizer, sack cleaner, horizontal tube falling film condenser and steam separator, it is characterized in that: spouted bed vaporizer comprises housing, air intlet nozzle, sea intake conduit, bed material particle and wet air delivery channel, wherein, described air intlet nozzle is fixedly installed on the bottom in the housing, and its input terminus is connected with the output terminal of solar energy air heat collector; Described sea intake conduit is arranged at the top in the housing, and is connected with the seawater input source; Described bed material particle is positioned over bottom in the housing; Described wet air delivery channel is arranged at housing top, and its output terminal connects sack cleaner, horizontal tube falling film condenser and steam separator successively; The output terminal output fresh water of described steam separator, its gas output end connects induced draft fan.
2. semidrying gas humidification dehumidification type seawater desalination system according to claim 1 is characterized in that, the housing of described spouted bed vaporizer adopts stainless material to make, and its outside is wrapped up by the asbestos thermal insulation layer.
3. semidrying gas humidification dehumidification type seawater desalination system according to claim 1 is characterized in that, the bed material particle of described spouted bed vaporizer is selected the quartz sand particle of particle diameter 350 μ m.
4. semidrying gas humidification dehumidification type seawater desalination system according to claim 1 is characterized in that, on the sea intake conduit of described spouted bed vaporizer flow director is set, in order to control import seawater amount.
5. semidrying gas humidification dehumidification type seawater desalination system according to claim 1, it is characterized in that, described horizontal tube falling film condenser shell side leads to wet air, its tube side is divided into up and down two independent sectors: the upper maritime water of part, seawater is set into and out of port, described sea intake is connected with the seawater storage tank, and described seawer outlet is connected with the sea intake conduit of spouted bed vaporizer; Lower part blowing air arranges air into and out of port, and described air intlet is connected with gas blower, and described airout is connected with solar energy air heat collector.
6. utilize the method for semidrying gas humidification dehumidification type seawater desalination system as claimed in claim 1, it is characterized in that, described method is carried out work in the following manner: the high temperature air from solar energy air heat collector enters spouted bed vaporizer by the air intlet nozzle, and the fluidized bed material particle also evaporates seawater; Bed material particle after seawater is fluidized is separated into drop, and part is attached on the evaporation of bed material particle surface, part direct evaporation; Air after the moisture absorption at first enters sack cleaner and removes salt grain in the wet air, then enters the horizontal tube falling film condenser condenses, and the heat of condensation of water vapor is used for preheating gas and seawater simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110304566XA CN102381735B (en) | 2011-10-10 | 2011-10-10 | Semi-dry process air humidifying and dehumidifying type seawater desalinating system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110304566XA CN102381735B (en) | 2011-10-10 | 2011-10-10 | Semi-dry process air humidifying and dehumidifying type seawater desalinating system and method |
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| CN102381735A CN102381735A (en) | 2012-03-21 |
| CN102381735B true CN102381735B (en) | 2013-02-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104114250B (en) * | 2012-04-25 | 2016-08-24 | 苏特沃克技术有限公司 | For concentrating the modularization humidifying-dehumidifying device of solution |
| CN102910696A (en) * | 2012-11-26 | 2013-02-06 | 山东科院天力节能工程有限公司 | Solar seawater desalination device |
| CN105621509B (en) * | 2016-03-07 | 2019-01-15 | 清华大学 | The humidification of fluidized bed enhanced water evaporation removes wet type water purification installation |
| CN107328254A (en) * | 2016-04-29 | 2017-11-07 | 江苏傲伦达科技实业股份有限公司 | A kind of new and effective condenser |
| CN106927528A (en) * | 2017-04-12 | 2017-07-07 | 南京师范大学 | A kind of air wetting dehumidification type desulfurizing waste water processing device of utilization solar energy |
| CN109721122A (en) * | 2019-01-18 | 2019-05-07 | 湖南铁道职业技术学院 | A kind of small-sized solar absorption refrigeration production water installations and production water method of freezing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4341601A (en) * | 1980-02-20 | 1982-07-27 | E. I. Du Pont De Nemours And Company | Water evaporation process |
| CN1597540A (en) * | 2003-09-16 | 2005-03-23 | 程方 | Sea water desalination method using air saturation humidity difference |
| CN201052976Y (en) * | 2007-04-24 | 2008-04-30 | 华南理工大学 | Solar energy seawater desalting device with cross-pipe falling-film evaporator and cross-pipe type surface-cooling equipment |
| CN100591628C (en) * | 2007-12-17 | 2010-02-24 | 何宗彦 | Sea water desalination and poor water purification device and method |
| CN201626849U (en) * | 2009-12-30 | 2010-11-10 | 山东山大能源环境有限公司 | Horizontal tube falling film evaporation device utilizing solar energy or waste heat |
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