WO2014101580A1 - 一种太阳能连续供热的海水淡化装置及方法 - Google Patents
一种太阳能连续供热的海水淡化装置及方法 Download PDFInfo
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- WO2014101580A1 WO2014101580A1 PCT/CN2013/087184 CN2013087184W WO2014101580A1 WO 2014101580 A1 WO2014101580 A1 WO 2014101580A1 CN 2013087184 W CN2013087184 W CN 2013087184W WO 2014101580 A1 WO2014101580 A1 WO 2014101580A1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0029—Use of radiation
- B01D1/0035—Solar energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/06—Flash distillation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/06—Flash distillation
- B01D3/065—Multiple-effect flash distillation (more than two traps)
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2307/00—Location of water treatment or water treatment 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
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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
- 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
- Y02A20/211—Solar-powered water purification
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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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- 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
Definitions
- the invention relates to a seawater desalination device and a method for continuously heating solar energy, belonging to the technical field of seawater desalination (including inland brackish water desalination).
- the invention can also be used in the field of sewage treatment.
- the remote water diversion project In addition to the huge investment, the remote water diversion project also requires a large amount of cultivated land, and there are also environmental hazards in the water diversion area.
- the Yellow River Jiqing (Island) project covers an area of 62,000 mu, which will cause ecological and environmental problems such as the Yellow River's cutoff and vegetation destruction, and the destruction of the ecological environment is economically difficult to estimate.
- the technical problem to be solved by the present invention is:
- the invention provides a seawater desalination device and method for continuously heating solar energy, which can produce fresh water continuously and environmentally in the coastal areas and inland brackish water areas, and solve the problem of shortage of fresh water in the area.
- the technical solution adopted by the present invention is:
- a seawater desalination device for continuously heating solar energy comprising a seawater purification system and a seawater desalination system; characterized in that: the seawater desalination system mainly comprises a solar concentrating heat collecting device, a solar thermal storage tank, a net seawater heater and at least The first-stage seawater flasher and the seawater flasher are mainly composed of a flasher body and a seawater cooler; wherein the heat-conducting medium cavity of the solar concentrating heat collecting device and the solar heat storage tank, and the heat-conducting medium heat exchanger in the net seawater heater The closed closed communication constitutes a heat transfer medium circulation path; the total net seawater outlet of the seawater purification system is connected with the net seawater heater and the seawater cooler respectively; the seawater outlet of the net seawater heater is connected with the flasher body; the flasher body is provided with a brine outlet Fresh water outlet and steam outlet.
- the steam outlet is collected in the fresh water main pipe together with the fresh water outlet through the steam heat exchanger in the sea water cooler.
- the closed fresh water storage tank at the end of the fresh water main pipe is connected with the vacuum pump.
- the concentrated brine outlet and the salt production plant pipeline Connected; the seawater outlet of the seawater cooler passes through the body condenser in the body of the flasher.
- the seawater heater is connected; when there is at least two-stage seawater flasher, the concentrated brine outlet of the front-stage flasher body is connected with the lower-stage flasher body, and the concentrated brine outlet of the last-stage flasher body is connected with the salt-making plant pipeline;
- the pressure in the body of the steamer is gradually reduced to form a negative pressure.
- a hot sea water pump with adjustable rotational speed is arranged between the seawater outlet of the net seawater heater and the body of the flasher, and the seawater outlet of the clean seawater heater is connected to the throttling device on the body of the flasher through the hot sea water pump.
- the flow device is located above the liquid surface; inside the flasher body, a defoamer is arranged above the throttling device, a fresh water storage tray is arranged above the defoamer, a bulk condenser is arranged on the fresh water storage tray; the steam outlet is located at the top of the flasher body, and the fresh water outlet Located above the freshwater storage tray, the brine outlet is located below the throttling device.
- a seawater temperature sensor and a backup heat exchanger are further disposed in the clean seawater heater, and the heat source of the standby heat exchanger is a hot oil furnace, an electric heating furnace, a boiler flue gas waste heat, or a steam engine residual steam heat.
- a hydrothermal pump is disposed between the solar heat storage tank and the heat exchanger in the clean sea water heater.
- the solar concentrating heat collecting device is a tower type solar collector, or a parabolic trough type vacuum tube collector, or an all glass vacuum tube collector, or a heat pipe type vacuum tube collector.
- the seawater purification system is a multi-stage purification system, which sequentially includes a crude seawater extraction well, a seawater sterilization clarifier, a multi-stage ultrafiltration tank equipped with an activated carbon filter layer and a multi-fiber filter layer.
- a seawater deoxygenation decarbonization tower for deoxygenation and decarbonization; a clean sea pool between the multistage ultrafiltration tank and the seawater oxygen removal and decarbonization tower;
- the seawater deoxygenation decarbonization tower is connected with the total clean seawater outlet;
- the extracted seawater well is connected to the seawater sterilization clarifier through the seawater lift pump, and the seawater sterilization clarifier is connected to the multistage ultrafiltration tank through a seawater transfer pump, multi-stage super
- the filter tank is connected to the clean sea pool through another seawater transfer pump.
- the clean sea water tank is connected to the seawater oxygen removal and decarbonization tower through the third sea water pump, and the seawater oxygen removal and decarbonization tower is connected to the total clean sea water outlet through the clean sea water pump;
- a sterilizing agent and a flocculating agent are added to the sterilization clarifier.
- the extraction seawater well is built on the beach, the wellhead is located above the highest tide line of the seawater, and the bottom of the well is located several meters below the sea level at low tide; the well wall adopts a porous concrete structure, and the outside of the well wall is gravel and gravel Filled with sand from the beach.
- the seawater desalination method adopting the above seawater desalination device is characterized in that seawater is purified into a clean seawater through multi-stage purification; the solar concentrating heat collecting device collects sunlight to heat the heat conductive medium, converts the solar energy into heat energy of the heat conduction medium, and heat energy through the heat conduction medium Continuously heating the purified clean seawater to a set temperature, and then heating the heated clean seawater to at least one flash evaporator for flashing.
- the pressure in the flasher body is gradually decreased step by step. Forming a negative pressure; the steam after flashing separates fresh water by condensation, and some of the steam that has not once condensed becomes fresh water after being exchanged by the seawater cooler;
- the concentrated brine at the bottom of the flasher flows into the subsequent secondary flashers in sequence, and then condenses and separates the fresh water during the flashing process.
- the concentrated brine without gasification is finally sent to the salt production plant; the solar concentrating collector collects the solar thermal energy and uses the heat transfer medium to heat the clean sea water while storing the heat transfer medium heat energy in the solar heat storage tank at night or overcast.
- the seawater is continuously heated by the stored heat transfer medium.
- the heat transfer medium sets the set temperature of the clean sea water to 55 ° C to 70 ° C or 70 ° C to 120 ° C, and the solar heat collector heats the heat transfer medium to 178 ° C to 600 ° C.
- the heat transfer medium sets the set temperature of the clean sea water to ⁇ 70 ° C, and the solar heat collector heats the heat transfer medium to 275 ° C to 395 ° C.
- the invention adopts a high-efficiency solar heat collector to heat a heat-conducting medium (such as heat-conducting oil, silicone oil, paraffin, molten salt), and then uses a heat-conducting medium to heat the clean seawater to a set temperature, thereby avoiding the device for directly heating the seawater by the solar heat collector.
- a heat-conducting medium such as heat-conducting oil, silicone oil, paraffin, molten salt
- fresh water plants need 24 hours of uninterrupted supply of fresh water.
- solar thermal energy By storing solar thermal energy through a heat-conducting medium, it is possible to heat sea water at night and continuously produce fresh water.
- the role of solar thermal storage tanks is set; one is to maintain the stability of solar heat output for cloudy weather at night, and the second is to provide 24-hour uninterrupted water supply for fresh water supply centers, both for civilian and industrial use.
- the role of thermal storage tanks is to More storage of solar energy during the day is used for night use.
- the extracted seawater well is built above the highest tide line of the sea on the beach.
- the depth of the well is several meters below the sea level at low tide.
- the diameter of the well should be sufficient to extract the amount of seawater. This allows the seawater in the well to be preliminarily filtered by the sand of the beach, which excludes most of the marine life and impurities.
- the beach is washed away by the rising tide and the tidal water. The beach can naturally be cleaned every day. Filtering ability.
- the method of drilling wells on the beach the well wall can be made of porous concrete structure, the outside of the well wall is gravel, and the gravel is filled with sand from the beach.
- the clean seawater in the deaerator and decarbonization tower driven by the seawater transfer pump needs to further remove oxygen and CO 2 gas. Since the seawater contains about 3.5% of salt, it is highly corrosive. The oxygen and CO 2 gas contained in the sea water will accelerate the corrosion of the equipment and must be removed as much as possible.
- the net seawater heater is composed of a heater vessel, a heat medium heat exchanger provided in the vessel, and a spare heat medium heat exchanger.
- the heat medium heat exchanger is arranged to heat the seawater to a certain temperature (for this purpose, a seawater temperature sensor is set in the clean seawater heater for measuring the temperature of the heated seawater), but if there is no sunlight in the rainy day,
- the 24-hour uninterrupted water supply at the freshwater supply center will be challenged, so that a spare heat exchanger is also installed in the clean seawater heater, and various auxiliary heat sources (such as hot oil furnaces, electric heating furnaces, etc.) can be used in the continuous rainy season.
- Boiler flue gas waste heat, steam engine exhaust steam, etc. to heat the seawater, so that fresh water can be produced continuously.
- the flasher consists of a flasher body and a seawater cooler.
- a throttle device, a defoamer, a fresh water storage tray, and a body condenser are disposed in the body of the flasher from bottom to top.
- the throttling device provided by the flasher body causes the hot seawater to enter the flasher to have a sudden pressure drop, a large amount of seawater vaporizes, and the steam rises, wherein the entrained larger seawater droplets encounter the defoamer (the desiccator is made of a mesh with a fine mesh) Made of 200 mesh, or 300 mesh, or 400 mesh wire mesh, made of corrosion-resistant materials, such as stainless steel wire, or titanium alloy wire, or carbon fiber wire...) blocked by the steam of the defoamer
- the bulk condenser a part of which is condensed into fresh water, falls into the fresh water storage tank, and is sent to the fresh water tank. A part of the steam enters the seawater cooler from the top of the flasher,
- the multi-stage flasher is composed of N identical single-stage flashers, N is a positive integer, and the fresh water output pipe of each single-stage flasher is connected through the fresh water master pipe to the closed fresh water storage tank, and the vacuum pump inlet pipe connection At the top of the water storage tank, when the vacuum pump is running, the pressure in each flash evaporator can be gradually reduced to form a negative pressure, which makes the hot sea water easily vaporize to form steam in each stage of the flasher, and releases latent heat when cold, and condenses into fresh water. .
- the concentrated seawater at the bottom of the flasher can also be gradually reduced in temperature and flowed into each secondary flasher to be flashed, and then condensed into fresh water, while the concentrated salt water without vaporization is finally sent to the salt production plant.
- FIG. 1 is a schematic view showing the structure of a seawater desalination apparatus for solar continuous heating according to the present invention.
- FIG. 2 is a schematic view showing the local structure of a seawater extraction well of the present invention.
- 1 is a solar heat collecting field
- 1a is a diversion mother tube of a solar heat collecting field
- a heat conducting medium is inside the mother tube
- 2 is a solar heat storage tank
- 2a is a hydrothermal pump
- 3 is a sea water heater
- 3b is Heat transfer medium heat exchanger
- 3c is a backup heat exchanger
- 3a is a hot sea water pump with adjustable speed
- T3e is a temperature sensor set in seawater heater
- the farthest stage on the far right is a 9-stage flasher
- 4a is a throttling device, installed at the bottom of the flasher
- 4b is a defoamer
- 4c is a fresh water storage tray
- 4d is a bulk condenser
- 4e is a seawater cooler.
- the steam heat exchangers 4f, 5 are arranged in a sealed fresh water storage tank, and the top of the tank is connected with a vacuum pump 5a through a pipeline
- 5b is a brine pump installed on the brine outlet pipe of the final stage flasher
- 6 is a seawater sterilization clarifier.
- 6a is an extraction seawater well built on the highest tidal line on the beach.
- the depth of the well is several meters below the sea level at low tide.
- the diameter of the well is moderate (satisfying the amount of seawater pumped)
- 6b is the seawater lift pump
- 6d is the clean seawater.
- Inlet switch valve 6e is the sewage valve of seawater sterilizing clarifier 6 (open 6d, 6e can input clean seawater for flushing sediment at bottom 6, 6e outlet pipe leading to sewage treatment plant)
- 7 is multi-stage ultrafiltration tank
- 7b is activated carbon filter layer
- 7c is multi-fiber filter core layer
- 7d is backwashing clean seawater input switch valve
- 7e is backwashing drain valve (regularly open 7d, 7e can input clean seawater for flushing 7 filter layers) , to restore the clean filter function of each filter layer)
- 8 is a clean sea pool
- 9 is an oxygen removal decarbonization tower
- 7a, 8a is a seawater transfer pump
- 9a is a clean sea water pump.
- 6b is a seawater lift pump, and 6a is a seawater extraction well.
- 6a1 is a seaside beach
- 6a2 is the highest tide line of sea water
- 6a3 is the lowest sea level line of sea water
- 6a4 is a porous concrete shaft wall with holes
- 6a5 is gravel
- 6a6 is bottom sand
- bottom sand will be with time Gradually pile up, need to be cleaned out of the well regularly.
- the utility model is composed of a seawater purification system and a seawater desalination system; the seawater desalination system mainly comprises a solar concentrating heat collecting device, a solar thermal storage tank 2, a clean seawater heater 3, and at least a first-stage seawater flasher, and the seawater flashing
- the steamer is mainly composed of a flasher body 4 and a seawater cooler 4e; wherein, the heat transfer medium chamber of the solar concentrating heat collecting device 1 and the solar heat storage tank 2, and the heat transfer medium heat exchanger 3b in the clean sea water heater 3 are sequentially
- the closed communication constitutes a heat transfer medium circulation path;
- the clean seawater outlet mother pipe of the clean seawater transfer pump 9a in the seawater purification system is connected to the inlet of the clean seawater heater 3 and the seawater cooler 4e respectively; the seawater outlet of the clean seawater heater 3 passes through the hot seawater
- the pump 3a is in communication with the inlet
- the outlets are collected together in the fresh water main pipe, and the closed fresh water storage tank 5 at the end of the fresh water main pipe is connected with the vacuum pump 5a, and the concentrated brine outlet is connected to the salt plant pipeline through the concentrated brine pump 5b.
- the seawater outlet of the seawater cooler 4e is connected to the input mother pipe of the seawater heater 3 through the body condenser 4d in the flasher body 4; when there is at least two-stage seawater flasher, the seawater removal pump 9a of the seawater purification system
- the net seawater outlet mother pipe is respectively connected with the seawater outlets of the body condensers 4d of the respective flashers; the brine outlet of the front stage flasher body 4 is connected to the inlet of the throttle device 4a of the lower flasher body 4, and the final stage flasher body
- the concentrated brine outlet of 4 is connected to the salt making pipeline through the concentrated brine pump 5b; the pressure in the flasher body 4 of each stage is gradually reduced to form a negative pressure.
- the seawater purification system is a multi-stage purification system, which includes, in order, a coarse filtration extraction seawater well 6a, a seawater sterilization clarification tank 6, a multi-stage ultrafiltration tank equipped with an activated carbon filter layer and a multi-fiber filter layer, and a seawater deaerator decarbonization tower 9 for deoxygenation and decarbonization; a clean sea pool 8 between the multistage ultrafiltration tank 7 and the seawater oxygen removal and decarbonization tower 9;
- the seawater deoxygenation decarbonization tower 9 is connected to the total clean seawater outlet;
- the extracted seawater well 6a is connected to the seawater sterilization clarifier 6 through the seawater lift pump 6b, and the seawater sterilization clarifier 6 is passed through a seawater transfer pump 7a and multistage ultrafiltration
- the pool 7 is connected, and the multistage ultrafiltration tank 7 is connected to the clean sea water tank 8 through another seawater transfer pump 8a.
- the clean sea water tank 8 is connected to the seawater oxygen removal and decarbonization tower 9 through the third sea water pump 8a, and the seawater is deaerated and decarbonized.
- the tower 9 is connected to the total clean seawater outlet through the clean sea water pump 9a; the seawater sterilization clarifier 6 is filled with a sterilizing agent and a flocculating agent.
- the seawater desalination method adopting the above seawater desalination device is characterized in that seawater is purified into a clean seawater through multi-stage purification; the solar concentrating heat collecting device collects sunlight to heat the heat conductive medium, converts the solar energy into heat energy of the heat conduction medium, and heat energy through the heat conduction medium Continuously heating the purified clean seawater to a set temperature, and then heating the heated clean seawater to at least one flash evaporator for flashing.
- the pressure in the flasher body is gradually decreased step by step. Forming a negative pressure; the steam after flashing separates fresh water by condensation, and some of the steam that has not once condensed becomes fresh water after being exchanged by the seawater cooler;
- the concentrated brine at the bottom of the flasher flows into the subsequent secondary flashers in sequence, and then condenses and separates the fresh water during the flashing process.
- the concentrated brine without gasification is finally sent to the salt production plant; the solar concentrating collector collects the solar thermal energy and uses the heat transfer medium to heat the clean sea water while storing the heat transfer medium heat energy in the solar heat storage tank at night or overcast.
- the seawater is continuously heated by the stored heat transfer medium.
- the heat transfer medium sets the set temperature of the clean sea water to 55 ° C to 70 ° C or 70 ° C to 120 ° C, and the solar heat collector heats the heat transfer medium to 178 ° C to 600 ° C.
- the heat transfer medium sets the set temperature of the clean sea water to ⁇ 70 ° C, and the solar heat collector heats the heat transfer medium to 275 ° C to 395 ° C.
- the seawater lifting pump 6b is first started, and the seawater is extracted from the extracted seawater well 6a and injected into the seawater sterilization clarification tank 6, since the seawater well 6a is built on the highest tide line on the beach. Above the 6a2, the well depth is lower than the sea level 6a3 at the lowest tide, which makes the seawater in the well have been initially natural filtered by the sand of the beach, eliminating most of the marine life and impurities, and the beach is rising every day, The tidal waters are washed away, and the beach can naturally maintain a certain degree of clean filtration capacity every day.
- the method of drilling wells on the beach: the borehole wall may adopt a porous concrete structure 6a4 with a hole, the outside of the well wall is a gravel 6a5, and the gravel is filled with sand grains of the beach to fill the structure.
- the multi-stage ultrafiltration tank 7 is input into the multi-stage ultrafiltration tank 7 through the transfer pump 7a, and is purified by multi-stage ultrafiltration to be stored in the clean sea water tank 8 for use.
- the sediment at the bottom of the sterilizing clarifier 6 (below the inlet of 7a) is cleaned regularly (using a small amount of clean sea water) and discharged to a sewage treatment plant.
- the multi-stage ultrafiltration tank 7 also needs to periodically use clean sea water for backwashing to restore the clean filtration capacity of each filter layer.
- the clean seawater in the deaerator decarbonization tower 9 driven by the 8a seawater pump needs to further remove oxygen and CO 2 gas. Because the seawater contains about 3.5% of salt, it is highly corrosive. The oxygen and CO 2 gas contained in the sea water will accelerate the corrosion of the equipment and must be removed as much as possible.
- the solar heat collecting field 1 collects the heat energy of the sunlight into the heat medium in 1a, and stores the heat energy in the heat storage tank 2 through the heat medium, and the heat pump 2a drives the heat medium to flow from 2 to the seawater heater 3
- the temperature of the clean seawater is increased (usually 55 ° C to 120 ° C), and the embodiment is set to 70 ° C, and the hot sea water is driven by the adjustable speed sea water pump 3a.
- the speed of the hot sea water pump 3a is adjusted to control the flow rate of the seawater sent to the first-stage flasher 4, thereby controlling the level of the seawater level of 4
- the pressure suddenly drops, the water in the hot sea water vaporizes a lot, and the steam rises.
- the large sea water droplets entrained in the steam are blocked by the defoamer, falling into the bottom of the flasher, and the steam rises to the top of the flasher.
- the concentrated brine enters the Class 2 flasher and repeats the whole process of 4a to 4f to produce fresh water.
- the final stage of this embodiment is a 9-stage flasher.
- the concentrated brine of the final stage flasher is finally driven by the brine pump 5b to the salt processing plant for further processing and utilization.
- the seawater entering the first-stage flasher undergoes a 9-stage distillation process, and about 40% of it is vaporized and condensed and converted into fresh water.
- the seawater desalination is not heated. The higher the sea temperature, the better.
- the salt in the seawater sodium ions and calcium, magnesium ions
- the preferred temperature parameter for seawater desalination to avoid fouling in the present embodiment should be about 70 ° C or ⁇ 70 ° C, and of course, in other temperatures ranging from 55 ° C to 70 ° C and 70 ° C to 120 ° C.
- the seawater desalination of the invention is only better than the comprehensive efficiency of ⁇ 70 °C.
- the invention has the advantages that the optimal temperature parameter (the optimal operating parameter of the current solar concentrating heat collecting field) is 275 ° C to 395 ° C (with heat conducting oil as medium) or 178 ° C due to the high efficiency operation of the solar heat collector. ⁇ 610 ° C (using molten salt as medium), for this reason, the invention uses a high-efficiency solar heat collector to heat the heat-conducting medium (such as heat-conducting oil, silicone oil, paraffin, molten salt) to meet the temperature operating parameters of the above-mentioned solar heat collector, and then Using a heat-conducting medium to heat seawater to about 70 °C can avoid the scaling problem of the solar water heater directly heating the seawater, so that the seawater flash desalination equipment can operate at the optimal temperature parameter and the solar heat collecting equipment can operate at the best. Parameters to maximize the benefits of collecting solar heat.
- the optimal temperature parameter is 275 ° C to 395 ° C (with heat conducting oil as medium) or 178 ° C
- heat-conducting media such as heat-conducting oil, silicone oil, paraffin, and molten salt
- the high-efficiency solar concentrating heat collecting device since the high-efficiency solar concentrating heat collecting device is adopted, the relatively dispersed solar energy can be efficiently collected, the heating and evaporation of seawater can be completed, the seawater desalination rate is up to 40%, and the solar energy can be stored. Continuous operation of fresh water at night without sunlight, producing fresh water with good quality and meeting drinking water standards. Moreover, the main use of clean energy solar energy, the desalination process is environmentally friendly, efficient, and large in output.
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Abstract
Description
Claims (10)
- 一种太阳能连续供热的海水淡化装置,由海水净化系统、海水除盐系统组成;其特征在于:海水除盐系统主要包括太阳能聚光集热装置、太阳能蓄热罐、净海水加热器以及至少一级海水闪蒸器,海水闪蒸器主要由闪蒸器本体与海水冷却器构成;其中,太阳能聚光集热装置的导热介质腔与太阳能蓄热罐、以及净海水加热器中的导热介质换热器顺次封闭连通构成导热介质循环路径;海水净化系统的总净海水出口与净海水加热器和海水冷却器分别连通;净海水加热器的海水出口与闪蒸器本体连通;闪蒸器本体设置浓盐水出口、淡水出口和蒸汽出口,蒸汽出口经海水冷却器中的蒸汽换热器后同淡水出口一同汇集于淡水总管,淡水总管末端的密闭式淡水储罐与真空泵连通,浓盐水出口与制盐厂管道连通;海水冷却器的海水出口经闪蒸器本体中的本体冷凝器后与海水加热器连通;存在至少两级海水闪蒸器时,前级闪蒸器本体的浓盐水出口与下级闪蒸器本体连通,最后一级闪蒸器本体的浓盐水出口与制盐厂管道连通;各级闪蒸器本体内压力依次逐级降低形成负压。
- 根据权利要求1所述的海水淡化装置,其特征在于:在净海水加热器海水出口与闪蒸器本体之间设置转速可调的热海水泵,净海水加热器海水出口经热海水泵后与闪蒸器本体上的节流装置连通,节流装置位于液面之上;闪蒸器本体内部,节流装置上方设置消沫器,消沫器上方设置淡水储盘,淡水储盘上设置本体冷凝器;蒸汽出口位于闪蒸器本体顶部,淡水出口位于淡水储盘之上,浓盐水出口位于节流装置之下。
- 根据权利要求1或2所述的海水淡化装置,其特征在于:净海水加热器内还设置海水温度传感器和备用换热器,所述备用换热器的热源为热油炉、电加热炉、锅炉烟气余热、或汽机乏汽余热。
- 根据权利要求1所述的海水淡化装置,其特征在于:在太阳能蓄热罐和净海水加热器中的换热器间设置热液泵。
- 根据权利要求1或4所述的海水淡化装置,其特征在于:太阳能聚光集热装置是塔式太阳能集热器、或抛物面槽式真空管集热器、或全玻璃真空管集热器、或热管式真空管集热器。
- 根据权利要求1所述的海水淡化装置,其特征在于:海水净化系统为多级净化系统,顺次包括进行粗过滤的抽提海水井、海水灭菌澄清池、装设有活性碳滤层和多纤维滤芯层的多级超滤池、以及用于除氧脱碳的海水除氧脱碳塔;多级超滤池与海水除氧脱碳塔之间设置净海水池; 海水除氧脱碳塔与总净海水出口连通;抽提海水井通过海水提升泵与海水灭菌澄清池连通,海水灭菌澄清池通过一个海水转运泵与多级超滤池连通,多级超滤池通过另一个海水转运泵与净海水池连通,净海水池通过第三个海水泵与海水除氧脱碳塔连通,海水除氧脱碳塔通过净海水泵与总净海水出口连通;海水灭菌澄清池中添加有灭菌剂和絮凝剂。
- 根据权利要求1或6所述的海水淡化装置,其特征在于:抽提海水井建于沙滩上,井口位于海水最高潮水线上方,井底面位于低潮时海平面下方数米;井壁采用多孔混凝土结构,井壁外为碎石,碎石外由沙滩的砂粒填充。
- 采用上述权利要求1-7之一所述海水淡化装置的海水淡化方法,其特征在于:海水经过多级净化成为净海水;太阳能聚光集热装置收集太阳光对导热介质进行加热,使太阳能转化为导热介质热能,通过导热介质热能持续不断地加热净化后的净海水到设定温度,然后加热后的热净海水输往至少一级闪蒸器中进行闪蒸,闪蒸过程中,保持各级闪蒸器本体内压力依次逐级降低形成负压;闪蒸后的蒸汽经冷凝分离出淡水,部分没有一次冷凝的蒸汽经海水冷却器换热后成为淡水;闪蒸器底部没有气化的浓盐水输往制盐厂;存在多级闪蒸器时,闪蒸器底部的浓盐水依次流入后续各次级闪蒸器中,逐级闪蒸过程中再冷凝分离出淡水,没有气化的浓盐水最终输往制盐厂;太阳能聚光集热装置收集太阳光热能且利用导热介质加热净海水的同时,还将导热介质热能储存在太阳能蓄热罐中,在夜晚或阴天时利用储存的导热介质对净海水进行持续加热。
- 根据权利要求8所述的海水淡化方法,其特征在于:导热介质将净海水加热的设定温度为55℃~70℃或为70℃~120℃,太阳能聚热器将导热介质加热到178℃~600℃。
- 根据权利要求8所述的海水淡化方法,其特征在于:导热介质将净海水加热的设定温度为±70℃,太阳能聚热器将导热介质加热到275℃~395℃。
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SI201331013T SI2939981T1 (en) | 2012-12-25 | 2013-11-15 | Sea water desalination apparatus and process using solar energy for continuous heat supply |
SG11201504977YA SG11201504977YA (en) | 2012-12-25 | 2013-11-15 | Seawater desalting apparatus and method using solar energy for continuously supplying heat |
CA2896316A CA2896316A1 (en) | 2012-12-25 | 2013-11-15 | Seawater desalting apparatus and method using solar energy for continuously supplying heat |
EP13867204.3A EP2939981B1 (en) | 2012-12-25 | 2013-11-15 | Seawater desalting apparatus and method using solar energy for continuously supplying heat |
JP2015548164A JP6154023B2 (ja) | 2012-12-25 | 2013-11-15 | 太陽エネルギ連続熱供給を利用する海水淡水化装置および方法 |
DK13867204.3T DK2939981T3 (en) | 2012-12-25 | 2013-11-15 | DEVICE FOR DISPOSAL OF SEAWATER AND PROCEDURE WHEN USING SOLAR ENERGY FOR CONTINUOUS SUPPLY OF HEAT |
RU2015130676/05A RU2603799C1 (ru) | 2012-12-25 | 2013-11-15 | Устройство для опреснения морской воды и способ применения солнечной энергии для непрерывной подачи тепла |
LTEP13867204.3T LT2939981T (lt) | 2012-12-25 | 2013-11-15 | Jūros vandens gėlinimo įrenginys ir būdas, naudojantys saulės energiją šilumai nepertraukiamai tiekti |
KR1020157019810A KR20150099590A (ko) | 2012-12-25 | 2013-11-15 | 연속적으로 열을 공급하기 위하여 태양 에너지를 사용하는 해수 탈염 장치 및 방법 |
AU2013370015A AU2013370015B2 (en) | 2012-12-25 | 2013-11-15 | Seawater desalting apparatus and method using solar energy for continuously supplying heat |
US14/749,672 US20150291463A1 (en) | 2012-12-25 | 2015-06-25 | Apparatus and method for desalinating seawater |
HRP20180683TT HRP20180683T1 (hr) | 2012-12-25 | 2018-04-30 | Uređaj za desalinizaciju morske vode i metoda korištenja solarne energije za kontinuirano dobivanje topline |
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CN111018026A (zh) * | 2020-01-08 | 2020-04-17 | 浙江工业大学 | 一种蒸发器冷凝器双侧利用的热泵海水淡化装置 |
CN112551752A (zh) * | 2020-12-10 | 2021-03-26 | 山东核电有限公司 | 一种基于反渗透海水淡化和核能供热的水热同传系统 |
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DK2939981T3 (en) | 2018-05-07 |
SG11201504977YA (en) | 2015-07-30 |
AU2013370015B2 (en) | 2016-12-22 |
AU2013370015A1 (en) | 2015-07-16 |
HRP20180683T1 (hr) | 2018-06-01 |
EP2939981B1 (en) | 2018-01-31 |
CN102976427B (zh) | 2014-05-28 |
CN102976427A (zh) | 2013-03-20 |
HUE036898T2 (hu) | 2018-08-28 |
CA2896316A1 (en) | 2014-07-03 |
LT2939981T (lt) | 2018-05-10 |
SI2939981T1 (en) | 2018-06-29 |
JP2016500336A (ja) | 2016-01-12 |
US20150291463A1 (en) | 2015-10-15 |
EP2939981A4 (en) | 2016-06-22 |
JP6154023B2 (ja) | 2017-06-28 |
EP2939981A1 (en) | 2015-11-04 |
RU2603799C1 (ru) | 2016-11-27 |
KR20150099590A (ko) | 2015-08-31 |
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