CN103449546B - System for comprehensive utilization of concentrated seawater by using solar pond - Google Patents

System for comprehensive utilization of concentrated seawater by using solar pond Download PDF

Info

Publication number
CN103449546B
CN103449546B CN201310243817.7A CN201310243817A CN103449546B CN 103449546 B CN103449546 B CN 103449546B CN 201310243817 A CN201310243817 A CN 201310243817A CN 103449546 B CN103449546 B CN 103449546B
Authority
CN
China
Prior art keywords
seawater
solar pond
pond
layer
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201310243817.7A
Other languages
Chinese (zh)
Other versions
CN103449546A (en
Inventor
张海春
王波
郁小芬
范会生
孙保库
陆阿定
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Marine Development Research Institute
Original Assignee
Zhejiang Marine Development Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Marine Development Research Institute filed Critical Zhejiang Marine Development Research Institute
Priority to CN201310243817.7A priority Critical patent/CN103449546B/en
Publication of CN103449546A publication Critical patent/CN103449546A/en
Application granted granted Critical
Publication of CN103449546B publication Critical patent/CN103449546B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/10—Solar heat collectors using working fluids the working fluids forming pools or ponds
    • F24S10/13—Salt-gradient ponds
    • 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
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/44—Heat exchange systems
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

The invention relates to a system for comprehensive utilization of concentrated seawater by using a solar pond. The system comprises a solar pond part and a seawater desalination part, wherein the concentrated seawater is conveyed to the solar pond part, and the seawater desalination part desalinates seawater by adopting a distillation method; the seawater in the solar pond part is subjected to salt gradient exchange for 1-2 months, then the seawater of a lower convection layer is introduced into a bottom heat exchanger, the bottom heat exchanger performs heat exchange with the seawater desalination part, and fresh water obtained by the seawater desalination part is respectively injected into a fresh water pond and an upper convection layer of the solar pond. The solar pond is combined with the seawater desalination part to realize effective utilization of the energy source of the solar pond, so that an energy source for distillation method seawater desalination is provided, the cost for seawater desalination is reduced, the fresh water and concentrated seawater passing through the seawater desalination part are treated and then can be used as supplemental water of the solar pond and a water supply for salt industry production, the effective utilization of energy and water resources is realized to the utmost extent, and the running cost of the system is reduced.

Description

A kind of solar pond concentrated seawater utilization system
Technical field
The present invention relates to field of seawater desalination, particularly relate to a kind of environmental protection, reduce costs, the solar pond concentrated seawater utilization system of recycle.
Background technology
Along with the development of China's economic society, the shortage of Freshwater resources has become one of important factor of restriction coastal economy development, desalination technology becomes the important means that China's Coastal Areas solves Freshwater resources deficiency, while Seawater Desalination Project scale constantly increases, the emission problem of its concentrated seawater is the focus of social concerns always.At present, domestic Seawater Desalination Project is except the project that a few engineering has concentrated seawater to fully utilize, the concentrated seawater of most desalimtor or directly to discharge, it will produce a series of negative impact to ocean environment, and high-salt wastewater has potential threat to marine organisms existence.
The exploitation of sun power are one of focuses of current era research, the laid down cost of salt gradient solar pond technology because of its cheapness and the long-term continuity to storage of solar energy and receive much concern.The strong brine that sea water desaltination is discharged is combined with the utilization of solar pond heat energy, provide on the one hand and build the necessary salt resource of solar pond, also solve the problem that concentrated seawater utilizes on the other hand, achieve save energy, reduce the object of pollution and emissions reduction.
Chinese patent publication No. CN102849887A, date of publication on January 2nd, 2013, name is called a kind of method for desalting seawater, this application case discloses a kind of method for desalting seawater, by the filtered water of former seawater after pre-treatment, enter the heat-discharging section interchanger of seawater desalination system, reclaim the heat of discharge section for condensed steam, obtain warm seawater after the higher heat exchange of temperature; Warm seawater is delivered into ultra-filtration equipment through low-pressure pump, ultrafiltration is produced water and is delivered into nanofiltration device through high-pressure pump, incrustation ion in selective removal seawater obtains nanofiltration softening water, through high-pressure pump input reverse osmosis unit, and obtained reverse osmosis produced water and reverse osmosis concentrated water; The water inlet of reverse osmosis concentrated water directly as MED or MSF device heat-recovery section after recovered energy; Will through MED or MSF device desalination produce water mix as tap water with reverse osmosis produced water, the dense water of nanofiltration after recovered energy with dense water dual disposal or comprehensive utilization.Its weak point is, the dense salinity water after desalination is high, and directly discharge affects environment, and seawater is larger to corrosion of equipment.
Summary of the invention
The sea water salinity that the object of the invention is to solve in existing seawater desalination system after desalination is high, directly discharge affects environment, and seawater provides a kind of environmental protection to the larger defect of corrosion of equipment, reduces costs, the solar pond concentrated seawater utilization system of recycle.
To achieve these goals, the present invention is by the following technical solutions:
A kind of solar pond concentrated seawater utilization system, this system comprises solar pond part and sea water desaltination part, the seawater obtained through desalination system is concentrated into the seawater that salinity is 15 ° of Be '-25 ° of Be ', then the seawater after concentrated is delivered to solar pond part, solar pond part comprises solar pond pond body and bottom interchanger, solar pond is divided into higher troposphere from top to bottom successively, non-convection layer and lower troposphere, the seawater after concentrating is injected in non-convection layer and lower troposphere respectively, higher troposphere injects fresh water, non-convection layer injects the seawater that salinity is 15-20 ° of Be ', the seawater that salinity is 21-25 ° of Be ' is injected in lower troposphere, sea water desaltination part adopts distillation method to desalinate seawater, seawater salt gradient in solar pond part exchanges the 1-2 month, after the temperature-stable of lower troposphere, lower tropospheric high temperature seawater is carried out heat exchange by bottom interchanger and sea water desaltination part, and the fresh water that sea water desaltination part obtains injects the higher troposphere of fresh-water pool and solar pond respectively.
In the technical program, the concentrated seawater obtained after sea water desaltination directly discharge can produce larger negative impact to ocean environment, and high salinity waste water has potential threat to marine organisms existence; First being carried out by concentrated seawater after sea water desaltination being concentrated into salinity is 15 ° of Be '-25 ° of Be ', then be introduced into solar pond, install coiled interchanger bottom solar pond, interchanger is according to ground more than 5cm, height is lower than 50cm, and the material of interchanger is 316L stainless steel; The lower tropospheric temperature of solar pond is higher, can provide high-temperature-hot-water for sea water desaltination part, and solar pond forms salt gradient by the exchange of inner different concns salts solution; The concentrated seawater that sea water desaltination part adopts existing seawater desalination system to obtain, carry out heat exchange with the bottom interchanger of solar pond to evaporate to make concentrated seawater, sea water desaltination part obtains a fresh water part and enters fresh-water pool, another part injects the higher troposphere of solar pond, for supplementing the minimizing because evaporating the solar pond higher troposphere caused; The concentrated seawater that in sea water desaltination part, concentrated seawater pond obtains through being pumped to salt pan, for day solar salt shan; Concentrated seawater after desalination system is desalinated and the combination of solar pond, not only achieve effective utilization of sea water desaltination concentrated seawater, decrease its impact on ocean environment, and solve the use of a large amount of product salt in salt gradient solar pond manufacture process, reduce the laid down cost of solar pond; The combination of solar pond and sea water desaltination part, achieve effective utilization of the solar pond energy, solve the energy derive of distillation sea water desalting, reduce the cost of sea water desaltination, through fresh water and the concentrated seawater of sea water desaltination part, as the supplementary water of solar pond and Salt production water, farthest can achieve effective utilization of energy and water resources, reduce the running cost of system again after treatment.
As preferably, sea water desaltination part is vacuum pump, condenser, steam separator, fresh water collecting device, fresh-water pool, spray equipment, vaporizer and concentrated seawater pond.
In the technical program, condenser is tubular heat exchanger structure, and material is 316L stainless steel, and on the top of sea water desaltination part, Main Function carries out preheating to charging seawater, carries out condensation to the steam that evaporation of seawater produces simultaneously;
Fresh water collecting device, Main Function collects the lower fresh water of condensation, and its underpart connects pump and pipeline, is collected in time by the fresh water of condensation and sends into fresh-water pool;
Fresh-water pool is rectangular pool, and Main Function is used to the fresh water depositing sea water desalinating plant, and a water part for fresh-water pool enters fresh water net, and another part is as the supplementary water of solar pond higher troposphere;
Steam separator is baffle plate type steam separator, and material is 316L stainless steel, and Main Function is separated with water by saturation steam;
Spray equipment is made up of pipeline and nozzle, is positioned at the below of steam separator, and the layout of nozzle is evenly distributed on the top of vaporizer, and pipeline material is 316L stainless steel, and nozzle material is brass, is Solid cone nozzle.Seawater through nozzle spray can be evenly distributed on the top of heat exchange pipe of evaporator.
Vaporizer is positioned at the below of spray equipment, is shell and tube heat exchanger, and material is aluminum brass, and pipe is outer be sprayed sea water, pipe interior for solar pond bottom carry out heat exchange and the hot water that obtains;
Concentrated seawater pond is positioned at the bottom of sea water desalinating plant, and unevaporated concentrated seawater is collected in effect, and concentrated seawater pond is connected to salt pan by pump, and seawater concentrated further carries out a day solar salt shan;
Vacuum pump is water ring vacuum pump, and Main Function is the vacuum tightness keeping sea water desalinating plant inner certain, makes the seawater of heat exchange carry out vacuum-evaporation.
As preferably, when carrying out sea water desaltination, first with vacuum pump by Pressure Drop to 10-20Kpa, then the concentrated seawater that obtains through existing seawater desalination system is sent into the condenser of sea water desaltination part.
As preferably, the concentration basin used when seawater concentrates is divided into three layers, and the lowest layer is the soil layer of 12-18cm, and middle layer is the reinforced concrete floor of 4-6cm, and the superiors are black plastic film layer.In the technical program, black plastic film is for strengthening the absorption of sun power.
As preferably, the pond body structure of described solar pond part is the shape of falling truncated rectangular pyramids, and bottom becomes 40 ° of-50 ° of angles with side, is followed successively by the thick slag blanket of 10-15cm, 8-12cm yellow mud bed course, the bentonite bed of 3-6cm, the C of 8-12cm bottom the body of pond from the bottom to top 20the C of fine-stone concrete layer, 0.4-0.6cm waterproof coating layer and 1-3cm 20fine-stone concrete protective layer, solar pond pond height 1.5-2.5m.
As preferably, the seawater in sea water desaltination part concentrated seawater pond is used for day solar salt shan.
As preferably, when seawater concentrates, first day sprays the phosphate corrosion inhibitor of 240-275ppm in seawater surface, then sprays the hydrogen peroxide solution of 120-150ppm, until sea water salinity reaches 15 ° of Be '-25 ° of Be ' every 5-10 days in seawater surface.In the technical program, owing to containing different material such as magnesium chloride, calcium chloride, various microorganism in seawater, meeting causes corrosion in various degree to metal, so when seawater concentrates, first spray phosphate corrosion inhibitor, then, in concentration process, then the hydrogen peroxide solution of 120-150ppm was sprayed, in order to disinfection every 5-10 days in seawater surface.
As preferably, the concentrated seawater gradation of injecting solar pond is injected, first the seawater that 60-70cm salinity is 21-25 ° of Be ' is injected to lower troposphere, then be the seawater of 15-20 ° of Be ' to the salinity of non-convection layer injection 5cm, the seawater injecting 5cm is continued, until the sea height of non-convection layer is to 40cm after water layer is stablized; Finally inject the fresh water of 5cm at higher troposphere, after water layer is stablized, continue the fresh water injecting 5cm, until the fresh water level of higher troposphere is to 25cm.
The invention has the beneficial effects as follows: the concentrated seawater after 1) desalination system being desalinated and the combination of solar pond, not only achieve effective utilization of sea water desaltination concentrated seawater, decrease its impact on ocean environment, and solve the use of a large amount of product salt in salt gradient solar pond manufacture process, reduce the laid down cost of solar pond;
2) combination of solar pond and sea water desaltination part, achieve effective utilization of the solar pond energy, solve the energy derive of distillation sea water desalting, reduce the cost of sea water desaltination, through fresh water and the concentrated seawater of sea water desaltination part, as the supplementary water of solar pond and Salt production water, farthest can achieve effective utilization of energy and water resources, reduce the running cost of system again after treatment.
Accompanying drawing explanation
Fig. 1 is the structural representation of solar pond concentrated seawater utilization system of the present invention.
Fig. 2 is the structural representation of solar pond pond of the present invention body.
In figure, 1, vacuum pump; 2, condenser; 3, fresh water collecting device; 4, steam separator; 5, spray equipment; 6, vaporizer; 7, concentrated seawater pond; 8, fresh-water pool; 9, solar pond; 10, bottom interchanger; 11, higher troposphere; 12, non-convection layer; 13, lower troposphere.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, the present invention will be further explained:
With reference to Fig. 1 and Fig. 2, sea water desaltination part is divided into vacuum pump 1, condenser 2, steam separator 4, fresh water collecting device 3, fresh-water pool 8, spray equipment 5, vaporizer 6 and concentrated seawater pond 7;
Solar pond 9 is divided into solar pond pond body and bottom interchanger 10, and solar pond 9 is divided into higher troposphere 11, non-convection layer 12 and lower troposphere 13 from top to bottom successively.
Embodiment 1
First vacuum pump 1 is passed through by Pressure Drop to 10Kpa, then the concentrated seawater obtained by existing seawater desalination system is squeezed in condenser 2 through pump, after heat exchange, concentrated seawater enters spray equipment 5, the concentrated seawater of spray is in the falling film evaporation from top to bottom of vaporizer 6 outer tube surface, water vapor is in uphill process, contact with condenser 2 after steam separator 4, condense into fresh water, condensed fresh water enters fresh-water pool 8 after being collected by fresh water collecting device 3; Unevaporated seawater then becomes concentrated seawater concentrated further and enters concentrated seawater pond, through being pumped to salt pan for day solar salt shan.
The structure of solar pond: the pond body structure of solar pond part is the shape of falling truncated rectangular pyramids, bottom becomes 40 ° of angles with side, be followed successively by the thick slag blanket of 10cm, 8cm yellow mud bed course, the bentonite bed of 3cm, the C of 8cm bottom the body of pond from the bottom to top 20the C of fine-stone concrete layer, 0.4cm waterproof coating layer and 1cm 20fine-stone concrete protective layer, solar pond pond height 1.5m, solar pond 9 is divided into higher troposphere 11, non-convection layer 12 and lower troposphere 13 from top to bottom successively, the seawater after concentrating is injected in non-convection layer 12 and lower troposphere 13 respectively, higher troposphere 11 injects fresh water, non-convection layer 12 injects the seawater that salinity is 15 ° of Be ', and the seawater that salinity is 21 ° of Be ' is injected in lower troposphere 13; The seawater gradation of injecting solar pond is injected, first the seawater that 60cm salinity is 21 ° of Be ' is injected to lower troposphere, then be the seawater of 15 ° of Be ' to the salinity of non-convection layer injection 5cm, after water layer is stablized, continue the seawater injecting 5cm, until the sea height of non-convection layer is to 40cm; Finally inject the fresh water of 5cm at higher troposphere, after water layer is stablized, continue the fresh water injecting 5cm, until the fresh water level of higher troposphere is to 25cm;
Seawater concentrates concentration basin used and is divided into three layers, and the lowest layer is the soil layer of 12cm, and middle layer is the reinforced concrete floor of 4cm, and the superiors are black plastic film layer; When seawater concentrates, first day sprays the phosphate corrosion inhibitor of 240ppm in seawater surface, then sprays the hydrogen peroxide solution of 120ppm, until sea water salinity reaches 15 ° of Be '-25 ° of Be ' every 5 days in seawater surface.
After water filling completes, solar pond forms salt gradient by the exchange of inner different concns salts solution, and the time is 1 month.Then proceed to the operation phase, under bottom, tropospheric temperature generally can reach 50-60 DEG C, treat bottom temp stable after namely by interchanger for sea water desaltination part provides thermal source.
Embodiment 2
First vacuum pump 1 is passed through by Pressure Drop to 17kPa, then the concentrated seawater obtained by existing seawater desalination system is squeezed in condenser 2 through pump, after heat exchange, concentrated seawater enters spray equipment 5, the concentrated seawater of spray is in the falling film evaporation from top to bottom of vaporizer 6 outer tube surface, water vapor is in uphill process, contact with condenser 2 after steam separator 4, condense into fresh water, condensed fresh water enters fresh-water pool 8 after being collected by fresh water collecting device 3; Unevaporated seawater then becomes concentrated seawater concentrated further and enters concentrated seawater pond, through being pumped to salt pan for day solar salt shan.
The structure of solar pond: the pond body structure of solar pond part is the shape of falling truncated rectangular pyramids, bottom and side angle at 45 °, is followed successively by the thick slag blanket of 12cm, 10cm yellow mud bed course, the bentonite bed of 4cm, the C of 10cm from the bottom to top bottom the body of pond 20the C of fine-stone concrete layer, 0.5cm waterproof coating layer and 2cm 20fine-stone concrete protective layer, solar pond pond height 2m, solar pond 9 is divided into higher troposphere 11, non-convection layer 12 and lower troposphere 13 from top to bottom successively, the seawater after concentrating is injected in non-convection layer 12 and lower troposphere 13 respectively, higher troposphere 11 injects fresh water, non-convection layer 12 injects the seawater that salinity is 18 ° of Be ', and the seawater that salinity is 23 ° of Be ' is injected in lower troposphere 13; The seawater gradation of injecting solar pond is injected, first the seawater that 65cm salinity is 23 ° of Be ' is injected to lower troposphere, then be the seawater of 16 ° of Be ' to the salinity of non-convection layer injection 5cm, after water layer is stablized, continue the seawater injecting 5cm, until the sea height of non-convection layer is to 40cm; Finally inject the fresh water of 5cm at higher troposphere, after water layer is stablized, continue the fresh water injecting 5cm, until the fresh water level of higher troposphere is to 25cm;
Seawater concentrates concentration basin used and is divided into three layers, and the lowest layer is the soil layer of 15cm, and middle layer is the reinforced concrete floor of 5cm, and the superiors are black plastic film layer; When seawater concentrates, first day sprays the phosphate corrosion inhibitor of 255ppm in seawater surface, then sprays the hydrogen peroxide solution of 135ppm, until sea water salinity reaches 15 ° of Be '-25 ° of Be ' every 8 days in seawater surface.
After water filling completes, solar pond forms salt gradient by the exchange of inner different concns salts solution, and the time is 1 month.Then proceed to the operation phase, under bottom, tropospheric temperature generally can reach 50-60 DEG C, treat bottom temp stable after namely by interchanger for sea water desaltination part provides thermal source.
Embodiment 3
First vacuum pump 1 is passed through by Pressure Drop to 20kPa, then the concentrated seawater obtained by existing seawater desalination system is squeezed in condenser 2 through pump, after heat exchange, concentrated seawater enters spray equipment 5, the concentrated seawater of spray is in the falling film evaporation from top to bottom of vaporizer 6 outer tube surface, water vapor is in uphill process, contact with condenser 2 after steam separator 4, condense into fresh water, condensed fresh water enters fresh-water pool 8 after being collected by fresh water collecting device 3; Unevaporated seawater then becomes concentrated seawater concentrated further and enters concentrated seawater pond, through being pumped to salt pan for day solar salt shan.
The structure of solar pond: the pond body structure of solar pond part is the shape of falling truncated rectangular pyramids, bottom becomes 50 ° of angles with side, be followed successively by the thick slag blanket of 15cm, 12cm yellow mud bed course, the bentonite bed of 6cm, the C of 12cm bottom the body of pond from the bottom to top 20the C of fine-stone concrete layer, 0.6cm waterproof coating layer and 3cm 20fine-stone concrete protective layer, solar pond pond height 2.5m, solar pond 9 is divided into higher troposphere 11, non-convection layer 12 and lower troposphere 13 from top to bottom successively, the seawater after concentrating is injected in non-convection layer 12 and lower troposphere 13 respectively, higher troposphere 11 injects fresh water, non-convection layer 12 injects the seawater that salinity is 20 ° of Be ', and the seawater that salinity is 25 ° of Be ' is injected in lower troposphere 13; The seawater gradation of injecting solar pond is injected, first the seawater that 70cm salinity is 25 ° of Be ' is injected to lower troposphere, then be the seawater of 20 ° of Be ' to the salinity of non-convection layer injection 5cm, after water layer is stablized, continue the seawater injecting 5cm, until the sea height of non-convection layer is to 40cm; Finally inject the fresh water of 5cm at higher troposphere, after water layer is stablized, continue the fresh water injecting 5cm, until the fresh water level of higher troposphere is to 25cm;
Seawater concentrates concentration basin used and is divided into three layers, and the lowest layer is the soil layer of 18cm, and middle layer is the reinforced concrete floor of 3cm, and the superiors are black plastic film layer; When seawater concentrates, first day sprays the phosphate corrosion inhibitor of 275ppm in seawater surface, then sprays the hydrogen peroxide solution of 150ppm, until sea water salinity reaches 15 ° of Be '-25 ° of Be ' every 5 days in seawater surface.
After water filling completes, solar pond forms salt gradient by the exchange of inner different concns salts solution, and the time is 2 months.Then proceed to the operation phase, under bottom, tropospheric temperature generally can reach 50-60 DEG C, treat bottom temp stable after namely by heat exchanger for sea water desaltination part provides thermal source.

Claims (6)

1. a solar pond concentrated seawater utilization system, this system comprises solar pond part and sea water desaltination part, it is characterized in that, the concentrated seawater obtained through desalination system is concentrated into further the seawater that salinity is 15 oBe '-25oBe ', then the seawater after concentrated is delivered to solar pond part, solar pond part comprises solar pond pond body and bottom interchanger, solar pond is divided into higher troposphere from top to bottom successively, non-convection layer and lower troposphere, the seawater after concentrating is injected in non-convection layer and lower troposphere respectively, higher troposphere injects fresh water, non-convection layer injects the seawater that salinity is 15-20 oBe ', it is the seawater of 21-25oBe ' that salinity is injected in lower troposphere, sea water desaltination part adopts distillation method to desalinate seawater, seawater salt gradient in solar pond part exchanges the 1-2 month, after treating lower troposphere temperature-stable, lower tropospheric high temperature seawater is carried out heat exchange by bottom interchanger and sea water desaltination part, and the fresh water that sea water desaltination part obtains injects the higher troposphere of fresh-water pool and solar pond respectively, when seawater concentrates, first day sprays the phosphate corrosion inhibitor of 240-275ppm in seawater surface, then sprays the hydrogen peroxide solution of 120-150ppm, until sea water salinity reaches 15 oBe '-25oBe ' every 5-10 days in seawater surface, the seawater gradation of injecting solar pond is injected, first injecting 60-70cm salinity to lower troposphere is the seawater of 21-25oBe ', then injecting the salinity of 5cm to non-convection layer is the seawater of 15-20oBe ', continues the seawater injecting 5cm, until the sea height of non-convection layer is to 40cm after water layer is stablized, finally inject the fresh water of 5cm at higher troposphere, after water layer is stablized, continue the fresh water injecting 5cm, until the fresh water level of higher troposphere is to 25cm.
2. a kind of solar pond concentrated seawater utilization system according to claim 1, is characterized in that, sea water desaltination part is vacuum pump, condenser, steam separator, fresh water collecting device, fresh-water pool, spray equipment, vaporizer and concentrated seawater pond.
3. a kind of solar pond concentrated seawater utilization system according to claim 1 and 2, it is characterized in that, when carrying out sea water desaltination, first with vacuum pump by Pressure Drop to 10-20Kpa, then the concentrated seawater that obtains through existing seawater desalination system is sent into the condenser of sea water desaltination part.
4. a kind of solar pond concentrated seawater utilization system according to claim 1, it is characterized in that, the concentration basin used when seawater concentrates is divided into three layers, and the lowest layer is the soil layer of 12-18cm, middle layer is the reinforced concrete floor of 4-6cm, and the superiors are black plastic film layer.
5. a kind of solar pond concentrated seawater utilization system according to claim 1, it is characterized in that, the pond body structure of described solar pond part is the shape of falling truncated rectangular pyramids, bottom becomes 40 ° of-50 ° of angles with side, is followed successively by the thick slag blanket of 10-15cm, 8-12cm yellow mud bed course, the bentonite bed of 3-6cm, the C of 8-12cm bottom the body of pond from the bottom to top 20the C of fine-stone concrete layer, 0.4-0.6cm waterproof coating layer and 1-3cm 20fine-stone concrete protective layer, solar pond pond height 1.5-2.5m.
6. a kind of solar pond concentrated seawater utilization system according to claim 1, is characterized in that, the seawater in sea water desaltination part concentrated seawater pond is used for day solar salt shan.
CN201310243817.7A 2013-06-19 2013-06-19 System for comprehensive utilization of concentrated seawater by using solar pond Expired - Fee Related CN103449546B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310243817.7A CN103449546B (en) 2013-06-19 2013-06-19 System for comprehensive utilization of concentrated seawater by using solar pond

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310243817.7A CN103449546B (en) 2013-06-19 2013-06-19 System for comprehensive utilization of concentrated seawater by using solar pond

Publications (2)

Publication Number Publication Date
CN103449546A CN103449546A (en) 2013-12-18
CN103449546B true CN103449546B (en) 2014-12-31

Family

ID=49732448

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310243817.7A Expired - Fee Related CN103449546B (en) 2013-06-19 2013-06-19 System for comprehensive utilization of concentrated seawater by using solar pond

Country Status (1)

Country Link
CN (1) CN103449546B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104464480B (en) * 2014-11-17 2016-09-07 河南理工大学 A kind of experimental technique of analog solar heating salt gradient solar pond
CN104819587A (en) * 2015-03-31 2015-08-05 戚荣生 Heat energy warehouse
CN108529651A (en) * 2018-06-12 2018-09-14 合肥丰洁生物科技有限公司 A kind of sea salt film condensing device
CN110316779B (en) * 2019-06-26 2021-11-19 浙江万里学院 High-efficiency energy-saving brackish water/seawater desalination device
CN110398072B (en) * 2019-08-01 2020-09-15 燕山大学 Salt gradient solar pond

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1721338A (en) * 2005-04-29 2006-01-18 孙伯鲁 Sea water desalination process
CN101398227B (en) * 2008-11-12 2010-12-08 曹金龙 High-efficiency heat utilization method for nonsaturated solar pond

Also Published As

Publication number Publication date
CN103449546A (en) 2013-12-18

Similar Documents

Publication Publication Date Title
CN203360035U (en) Comprehensive concentrated-seawater utilization device with solar pool
Soliman et al. Energy consumption and environmental impact assessment of desalination plants and brine disposal strategies
Moossa et al. Desalination in the GCC countries-a review
CN103449546B (en) System for comprehensive utilization of concentrated seawater by using solar pond
CN102329037B (en) Low-temperature multi-effect evaporation seawater desalinization device and method for desalting seawater
CN101219817B (en) Multiple-effect distillation device and method for desalting sea water or brackish water only by using solar
CN103524005B (en) Combined type environment-friendly device using MVR-bipolar electrolysis-biological enhancement technology
CN1724419A (en) Resource process of inflitration liquid
CN104310687A (en) Efficient MVR integrated seawater desalination device and seawater desalination method
CN104671313A (en) Solar sea water desalination device
CN102344179A (en) Solar absorption type sea water desalination device with regenerative cycle
CN202193691U (en) Equipment for triple-effect waste water desalination process
CN1760136A (en) A kind of industrial water system clean preparation method that comprises recirculated cooling water and boiler water supply
CN201834781U (en) Single-stage vacuum distillation seawater desalination device
CN102745852B (en) Brine-desalination method
CN204848322U (en) High salt solution processing system
CN1850645A (en) Combined production process technology for low-cost zero-emission sea water desalination comprehensive utilization
CN206901955U (en) A kind of garbage percolation liquid treating system
CN102145954A (en) Method for solving water resource shortage problem and preventing and controlling desert by seawater desalinization through ocean nuclear energy
Pandey et al. Desalination and solar still: boon to earth
CN206886879U (en) Membrane separation process concentrates the processing unit of brackish water
CN106745434A (en) A kind of operation under positive pressure desalting seawater through multi-effect evaporation system based on the middle temperature heat build-up of solar energy
CN106082378A (en) A kind of low temperature (1+n) effect distillation seawater desalination technique
CN110357336A (en) A kind for the treatment of process and system of the high waste water containing nitrate nitrogen
Ullah et al. An overview of solar thermal desalination technologies

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141231

Termination date: 20160619