CN203006975U - Solar continuous heat supply seawater desalination device - Google Patents
Solar continuous heat supply seawater desalination device Download PDFInfo
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- CN203006975U CN203006975U CN201220722859XU CN201220722859U CN203006975U CN 203006975 U CN203006975 U CN 203006975U CN 201220722859X U CN201220722859X U CN 201220722859XU CN 201220722859 U CN201220722859 U CN 201220722859U CN 203006975 U CN203006975 U CN 203006975U
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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
- Y02A20/211—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
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Abstract
The utility model relates to a solar continuous heat supply seawater desalination device, and belongs to the technical field of seawater desalination (including inland brackish water desalination). The solar continuous heat supply seawater desalination device comprises a seawater purification system and a seawater desalting system, wherein the seawater purification system comprises a seawater extraction well, a seawater sterilization clarification pond, a multi-stage ultrafiltration pond and a purified seawater pond; the seawater desalting system comprises a solar light-gathering heat-collecting device, a solar heat accumulation tank, a purified seawater heater and a seawater multi-stage flash evaporator; and the solar light-gathering heat-collecting device collects sunlight heat energy at daytime through a heat-conducting working medium, stores in the solar heat accumulation tank and heats purified seawater to a certain temperature, and hot seawater is delivered into the seawater multi-stage flash evaporator and is steamed stage by stage, so that fresh water and saline water can be separated. According to the utility model, seawater can be heated and evaporated by efficiently collecting relatively-dispersed solar energy, so that the quality of the produced fresh water achieves a drinking water standard; the stored solar energy is used for continuous operation at night without sunlight to produce the fresh water, so that the desalination rate of the seawater achieves 40%; and high output is achieved.
Description
Technical field
The utility model relates to a kind of sea water desalinating plant of solar energy continuous heat supply, belongs to sea water desaltination (containing Inner land brackish water desalination) technical field.This utility model also can be used for sewage treatment area.
Background technology
Along with China's rapid development of economy in southeastern coast economy than comparatively developed regions, Freshwater resources problem in short supply highlights, surface subsidence problem has occured because of excessive extraction underground water in the ground such as Beijing, Shanghai, Tianjin, Qingdao.For this reason since the eighties, country successively carried out divert Luanhe water to Tianjin, divert water via a canal from the yellow River into Qingdao, the long-range water diversion project such as the south water to north.
Long-range diversion works except huge investment, also will take a large amount of arable lands, also exists by the problems such as environmental hazard in diversion area.As (island) engineering of diverting water via a canal from the yellow River into Qingdao, occupation of land reaches 6.2 ten thousand mu, also can cause the ecological environment problems such as the Yellow River cutout, vegetation deterioration, and the destruction of ecotope is difficult to the appraisal economically.
Some coastal cities such as Qingdao, Haikou, Lingshui etc., the formation in city come from it near fresh, but because tide De Up falls, the presence of typhoon, seawater often immerses in the river mouth approximately 30-50 kilometer, and in the other fresh of City by The Sea, essence is dilute seawater, is the discounted fresh water of quality.
21 century, remove energy dilemma, the environmental protection pressure that CO2 reduces discharging also has the crisis of Freshwater resources scarcity, grasps with the method for science, environmental protection the Sustainable development that more Freshwater resources mean national economy, also means the national degree that is well off.
For a long time, utilize various heat energy to heating of seawater, produce steam, then to make vapor condensation be fresh water, be island, coastwise resident, and even oceangoing vessel obtains the important method of fresh water always.That sun power has is widely distributed, reserves unlimited, collect and utilize cleaning, CO2 zero release, and the advantage that belongs to renewable energy source also causes people's extensive concern; But its dispersion is subjected to weather effect larger, and it is unstable, discontinuous that energy collects etc., has variety of problems again on utilizing.
Therefore seek technological approaches, collect efficiently solar heat and move continuously round the clock and carry out sea water desaltination, just become the effective ways that solve the Freshwater resources scarcity.
The utility model content
The technical problems to be solved in the utility model is: a kind of sea water desalinating plant of solar energy continuous heat supply is provided, can be in the coastland, brackish water area, Inner land, round the clock incessantly, more environmental protection ground produces fresh water, solves the deficient problem of fresh water of this area.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of sea water desalinating plant of solar energy continuous heat supply, system forms by seawater purification system, water desalination; It is characterized in that: the water desalination system mainly comprises solar light-condensing and heat-collecting device, solar heat-preservation tank, clean salt water heater and one-level sea water flash steaming device at least, and the sea water flash steaming device mainly is made of flasher body and sea water cooler; Wherein, the heat-conducting medium chamber of solar light-condensing and heat-collecting device is sealed in turn with heat-conducting medium interchanger in solar heat-preservation tank and clean salt water heater and is communicated with formation heat-conducting medium circulating path; The total clean seawer outlet of seawater purification system is communicated with respectively with clean salt water heater and sea water cooler; The seawer outlet of clean salt water heater is communicated with the flasher body; The flasher body arranges strong brine outlet, water outlet and vapour outlet, together come together in the fresh water house steward with water outlet after the vapor heat exchanger of vapour outlet in sea water cooler, the closed fresh water storage tank of fresh water house steward end is communicated with vacuum pump, strong brine outlet and salt manufacturing factory pipeline communication; Be communicated with salt water heater after the seawer outlet of sea water cooler this condenser body in the flasher body; When having at least two-stage sea water flash steaming device, the outlet of the strong brine of prime flasher body is communicated with subordinate flasher body, and the strong brine of last step flasher body exports and salt manufacturing factory pipeline communication; Flasher body internal pressures at different levels reduce step by step successively and form negative pressure.
By technique scheme, between clean salt water heater seawer outlet and flasher body, the adjustable hot sea water pump of rotating speed is being set, the salt water heater seawer outlet is through being communicated with throttling set on the flasher body after the hot sea water pump only, and throttling set is positioned on liquid level; Defoamer is set above flasher body interior, throttling set, above defoamer, fresh water storage dish is set, on fresh water storage dish, this condenser body is set; Vapour outlet is positioned at the flasher bodies top, and water outlet is positioned on fresh water storage dish, and the strong brine outlet is positioned under throttling set.
By technique scheme, in clean salt water heater, seawater temperature sensor and standby interchanger are set also, the thermal source of described standby interchanger is hot oil furnace, electrical heater, residual heat from boiler fume or steam turbine exhaust steam residual heat.
By technique scheme, between the interchanger in solar heat-preservation tank and clean salt water heater, the hydrothermal solution pump is set.
By technique scheme, solar light-condensing and heat-collecting device is tower type solar heat collector or paraboloid trough type vacuum tube collector or glass vacuum pipe heat collector or heat pipe vacuum tube hot collector.
By technique scheme, seawater purification system is the stage purification system, comprises in turn the extracting seawater well that carries out coarse filtration, seawater sterilization settling pond, is equiped with the multi-ultrafiltration pond of activated carbon filtering layer and multifilament filter core layer and the seawater deoxygenation decarbonizing tower that is used for the deoxygenation decarburization; Clean seawater pond is set between multi-ultrafiltration pond and seawater deoxygenation decarbonizing tower; Seawater deoxygenation decarbonizing tower is communicated with total clean seawer outlet; Extracting seawater well is communicated with seawater sterilization settling pond by seawater lift pump, seawater sterilization settling pond is communicated with the multi-ultrafiltration pond by a seawater transhipment pump, the multi-ultrafiltration pond is communicated with seawater pond only by another seawater transhipment pump, clean seawater pond is communicated with seawater deoxygenation decarbonizing tower by the 3rd sea-water pump, and seawater deoxygenation decarbonizing tower is communicated with total clean seawer outlet by clean sea-water pump; Be added with disinfectant and flocculation agent in seawater sterilization settling pond.
By technique scheme, extracting seawater well is built on the sandy beach, and well head is positioned at above seawater highest high water waterline, and the shaft bottom face is positioned at number formulary rice under the time of low water sea level; The borehole wall adopts porous concrete structure, and the borehole wall is outward rubble, and the outer sand grains by the sandy beach of rubble is filled.
Adopt the method for desalting seawater of above-mentioned sea water desalinating plant, it is characterized in that: seawater becomes clean seawater through stage purification; Solar light-condensing and heat-collecting device is collected sunlight heat-conducting medium is heated, make sun power be converted into heat-conducting medium heat energy, add continuously clean seawater after thermal purification to design temperature by heat-conducting medium heat energy, then the clean seawater of the heat after the heating is transported at least and is carried out flash distillation in the one-level flasher, in flash vaporization process, keep flasher body internal pressures at different levels to reduce step by step successively and form negative pressure; Steam after flash distillation does not partly have the steam of a condensation to become fresh water after the sea water cooler heat exchange through condensation and separation of fresh water;
The strong brine that flasher bottom not have to gasify is transported to salt manufacturing factory; When having Multistage flash evaporator, the strong brine of flasher bottom flows in follow-up each secondary flash vessel successively, step by step in flash vaporization process again condensation and separation of fresh water, the strong brine that not have to gasify is finally transported to salt manufacturing factory; When solar light-condensing and heat-collecting device is collected solar heat energy and is utilized the clean seawater of heat-conducting medium heating, also with the heat-conducting medium thermal energy storage in the solar heat-preservation tank, utilize the heat-conducting medium that stores to carry out continuous heating to clean seawater when night or cloudy day.
By technique scheme, heat-conducting medium is 55 ℃～70 ℃ or is 70 ℃～120 ℃ the design temperature of clean heating of seawater, and solar energy collectors are heated to 178 ℃～600 ℃ with heat-conducting medium.
By technique scheme, heat-conducting medium is ± 70 ℃ with the design temperature of clean heating of seawater, and solar energy collectors are heated to 275 ℃～395 ℃ with heat-conducting medium.
The utility model adopts high-efficiency solar heat collector heating heat-conducting medium (as thermal oil, silicone oil, paraffin wax, melting salt), remove to heat clean seawater to design temperature with heat-conducting medium again, both can avoid the equipment scaling problem of solar energy collectors direct heating seawater, make seawater flash distillation desalting plant operate in the optimum temps parameter, can make again sun power heat build-up equipment also operate in its optimum parameter and (heat-conducting medium is heated to 275 ℃～395 ℃, or 178 ℃～600 ℃), reach the maximizing the benefits of collecting solar heat.
Simultaneously, general fresh water factory needed uninterruptedly provide sweet water in 24 hours, stored solar heat energy by heat-conducting medium, just can make the evening also can heating seawater, uninterruptedly produced fresh water.
The effect of solar heat-preservation tank is set; The one, for night cloudy weather keep the output stability of solar heat, secondly be civilian or industrial 24 hours uninterrupted water supply that all require for the water supply center, the effect of heat-accumulator tank is exactly that sun power for storage as much as possible daytime is used for using evening.
Extracting seawater well is built in seawater highest high water waterline top on the sandy beach, and well depth is lower than number formulary rice under the time of low water sea level, and the well diameter should satisfy the extracting seawater amount and get final product.This makes the seawater in well carry out certain preliminary natural filtration by the sand grains at sandy beach, got rid of most marine organisms and impurity, and the tide of sandy beach through every day plays, the ebb seawater scouring, and the sandy beach can keep certain clean filtering ability every day naturally.And the method for digging a well on the sandy beach: the borehole wall can adopt porous concrete structure, and the borehole wall is outward rubble, and rubble is outer fills structure by the sand grains at sandy beach.
Add disinfectant (as chlorine) in seawater sterilization settling pond, kill planktonic organism in seawater and microorganism, mushroom, then add flocculation agent (as FeCl
2, or alum all can), make seawater standing limpid, the clear liquor on top, pond becomes clean seawater through multi-ultrafiltration and is stored in clean seawater pond stand-by in transhipment pump input multi-ultrafiltration pond.The sediment of sterilization settling pond bottom (below of seawater transhipment pump intake) needs periodic flushing (using a small amount of clean seawater) cleaning, is discharged into sewage work.The multi-ultrafiltration pond also needs regularly to use clean seawater, carries out back flushing, to recover the clean filtering ability of filtering layers at different levels.
When the water desalination system started, clean seawater also need further remove oxygen and CO in the deoxygenation decarbonizing tower under the driving of seawater transhipment pump
2Gas approximately contains 3.5% salinity because of seawater, have very strong corrodibility, the oxygen that contains in seawater and CO
2Gas can be accelerated the corrosion of equipment, must remove as possible.
Clean salt water heater is by the well heater container, and the heat-conducting medium interchanger that arranges in container, standby heat-conducting medium interchanger form.This wherein arranges the heat-conducting medium interchanger is (to be provided with the seawater temperature sensor in clean salt water heater for heating seawater to certain temperature for this reason, be used for measuring heated seawater temperature), if but when running into the cloudy weather for several days running sky without sunlight, the uninterrupted water supply in 24 hours at water supply center will be challenged, also be provided with standby interchanger in clean salt water heater for this reason, can utilize various auxiliary thermal sources (as hot oil furnace, electrical heater, residual heat from boiler fume, steam turbine exhaust steam residual heat etc.) to come heating seawater during season running into cloudy weather for several days running, fresh water is uninterruptedly produced.
Flasher is comprised of flasher body and sea water cooler.Be provided with from top to bottom throttling set, defoamer, fresh water storage dish, this condenser body in the flasher body.the throttling set of flasher body setting makes hot sea water enter flasher internal pressure bust, a large amount of seawater vaporizations, steam rising, the larger sea water drops of wherein carrying secretly runs into defoamer, and (defoamer is made by the very thin silk screen of mesh, as 200 orders, or 300 order, or 400 order silk screen, material is corrosion resistant material, as: Stainless Steel Wire, or titanium alloy wire, or carbon fiber wire ...) hindered by the hurdle, steam by defoamer runs into this condenser body, a part is condensed into fresh water and drops in fresh water storage dish, transport to the fresh water tank, part steam enters in sea water cooler from the flasher top, because Mare Frigoris water sprays to vapor heat exchanger in water cooler, make steam again cooling, discharge latent heat, be condensed into fresh water and transport to the fresh water tank.
Multistage flash evaporator is comprised of N identical one-stage flash vessel, N is positive integer, the fresh water output tube of each one-stage flash vessel links by the female pipe of fresh water, lead to airtight fresh water storage tank, the vacuum pump inlet pipeline connects the water storage tank deck, flasher internal pressures at different levels is reduced successively step by step form negative pressure, and this makes every grade of flasher Inner all can make the hot sea water formation steam of easily vaporizing, meet the cold latent heat that discharges, be condensed into fresh water.The concentrated seawater of flasher bottom also can reduce step by step successively temperature and flow into flash distillation in each secondary flash vessel, then is condensed into fresh water, and the dense sea brine of vaporization is not finally transported to salt manufacturing factory.
Description of drawings
Below in conjunction with drawings and Examples, the utility model is described.
Fig. 1 is the sea water desalinating plant structural representation of solar energy continuous heat supply of the present utility model.
Fig. 2 is seawater extraction well local structure schematic diagram of the present utility model.
in Fig. 1, the 1st, sun power heat build-up field, 1a is the female pipe of water conservancy diversion of sun power heat build-up field, in female pipe, heat-conducting medium is arranged, the 2nd, the solar heat-preservation tank, 2a is the hydrothermal solution pump, the 3rd, salt water heater, 3b is the heat-conducting medium interchanger, 3c is standby interchanger, 3a is the adjustable hot sea water pump of rotating speed, T3e is arranged on the temperature sensor in salt water heater, the 4th, one-stage flash vessel, wherein N is positive integer, during N=1, flasher is called 1 grade of flasher, during N=2, flasher is called 2 grades of flashers, the rest may be inferred until N level flasher, common N=3～9, get N=9 in preferred forms, the final stage of the rightmost side is 9 grades of flashers, 4a is throttling set, be loaded on bottom flasher, 4b is defoamer, 4c is fresh water storage dish, 4d is this condenser body, 4e is sea water cooler, vapor heat exchanger 4f is set in it, the 5th, airtight fresh water storage tank, tank deck is connected with vacuum pump 5a by pipeline, 5b is the brinepump that arranges on final stage flasher strong brine outlet conduit, the 6th, seawater sterilization settling pond, 6a is extracting seawater well, it is built in highest high water waterline top on the sandy beach, well depth is lower than number formulary rice under the time of low water sea level, well diameter appropriateness (satisfying the extracting seawater amount gets final product), 6b is seawater lift pump, 6d is clean seawater entry switch valve, 6e is that the wash water valve of seawater sterilization settling pond 6 (is opened 6d, 6e can input the sediment that clean seawater is used for rinsing 6 bottoms, the outlet conduit of 6e leads to sewage work), the 7th, the multi-ultrafiltration pond, 7b is the activated carbon filtering layer, 7c is multifilament filter core layer, 7d is that seawater input switch valve is cleaned in recoil, 7e is that backwashing sewer valve (is regularly opened 7d, 7e can input clean seawater and be used for rinsing each filtering layer of 7, recover the dirty function of cleaning filter of each filtering layer), the 8th, clean seawater pond, the 9th, the deoxygenation decarbonizing tower, 7a, 8a is seawater transhipment pump, 9a is clean sea-water pump.
In Fig. 2,6b is seawater lift pump, 6a is the seawater extraction well, 6a1 is the sandy beach, seashore, 6a2 is seawater highest high water waterline, and 6a3 is the minimum sea level line of seawater, and 6a4 is the pertusate cellular concrete borehole wall, 6a5 is the rubble gravel, 6a6 is sea, shaft bottom sand, and sea, shaft bottom sand can progressively be piled high in time, needs periodic cleaning to go out outside well.
Embodiment
Fig. 1, Fig. 2 are the sea water desalinating plant of the solar energy continuous heat supply implemented according to the utility model, and system forms by seawater purification system, water desalination; It is characterized in that: the water desalination system mainly comprises solar light-condensing and heat-collecting device 1, solar heat-preservation tank 2, clean salt water heater 3 and one-level sea water flash steaming device at least, and the sea water flash steaming device mainly is made of with sea water cooler 4e flasher body 4; Wherein, the heat-conducting medium chamber of solar light-condensing and heat-collecting device 1 is sealed in turn with heat-conducting medium interchanger 3b in solar heat-preservation tank 2 and clean salt water heater 3 and is communicated with formation heat-conducting medium circulating path; In seawater purification system, the female pipe of clean seawer outlet of clean seawater transhipment pump 9a is communicated with respectively with entrance and the sea water cooler 4e of clean salt water heater 3; The seawer outlet of clean salt water heater 3 is communicated with the throttling set 4a entrance of the 1st grade of flasher body after hot sea water pump 3a; Flasher body 4 arranges strong brine outlet, water outlet and vapour outlet, together come together in the fresh water house steward with water outlet after the vapor heat exchanger 4f of vapour outlet in sea water cooler 4e, the airtight fresh water storage tank 5 of fresh water house steward end is communicated with vacuum pump 5a, strong brine outlet after strong brine pump 5b with salt manufacturing factory pipeline communication; Be communicated with the female pipe of the input of salt water heater 3 after this condenser body 4d of the seawer outlet of sea water cooler 4e in flasher body 4; When having at least two-stage sea water flash steaming device, in seawater purification system, the female pipe of clean seawer outlet of clean seawater transhipment pump 9a is communicated with respectively with the seawer outlet of this condenser body 4d of each flasher; The outlet of the strong brine of prime flasher body 4 is communicated with the throttling set 4a entrance of subordinate flasher body 4, and the strong brine of last step flasher body 4 exports after strong brine pump 5b the pipeline communication with salt manufacturing factory; Flasher body 4 internal pressures at different levels reduce step by step successively and form negative pressure.
Seawater purification system is the stage purification system, comprises in turn the extracting seawater well 6a that carries out coarse filtration, seawater sterilization settling pond 6, is equiped with the multi-ultrafiltration pond 7 of activated carbon filtering layer and multifilament filter core layer and the seawater deoxygenation decarbonizing tower 9 that is used for the deoxygenation decarburization; Clean seawater pond 8 is set between multi-ultrafiltration pond 7 and seawater deoxygenation decarbonizing tower 9; Seawater deoxygenation decarbonizing tower 9 is communicated with total clean seawer outlet; Extracting seawater well 6a is communicated with seawater sterilization settling pond 6 by seawater lift pump 6b, seawater sterilization settling pond 6 is communicated with multi-ultrafiltration pond 7 by a seawater transhipment pump 7a, multi-ultrafiltration pond 7 is communicated with seawater pond 8 only by another seawater transhipment pump 8a, clean seawater pond 8 is communicated with seawater deoxygenation decarbonizing tower 9 by the 3rd sea-water pump 8a, and seawater deoxygenation decarbonizing tower 9 is communicated with total clean seawer outlet by clean sea-water pump 9a; Be added with disinfectant and flocculation agent in seawater sterilization settling pond 6.
When utilizing the sea water desalinating plant of solar energy continuous heat supply to carry out sea water desaltination, at first start seawater lift pump 6b, extracting seawater is injected seawater sterilization settling pond 6 from extracting seawater well 6a, be built in the top of highest high water waterline 6a2 on the sandy beach due to seawater well 6a, well depth is sea level 6a3 during lower than lowest low water, this makes the seawater in well carry out certain preliminary natural filtration by the sand grains at sandy beach, most marine organisms and impurity have been got rid of, and the tide of sandy beach through every day rises, the ebb seawater scouring, and the sandy beach can keep certain clean filtering ability every day naturally.And the method for digging a well on the sandy beach: the borehole wall can adopt pertusate porous concrete structure 6a4, and the borehole wall is outward rubble 6a5, and rubble is outer fills structure by the sand grains at sandy beach.
Add disinfectant (as chlorine) in seawater sterilization settling pond 6, kill planktonic organism in seawater and microorganism, mushroom, then add flocculation agent (as FeCl
2, or alum all can), make seawater standing limpid, the clear liquor on top, pond becomes clean seawater through multi-ultrafiltration and is stored in clean seawater pond 8 stand-by in transhipment pump 7a input multi-ultrafiltration pond 7.The sediment of sterilization settling pond 6 bottoms (below of 7a entrance) needs periodic flushing (using a small amount of clean seawater) cleaning, is discharged into sewage work.Multi-ultrafiltration pond 7 also needs regularly to use clean seawater, carries out back flushing, to recover the clean filtering ability of filtering layers at different levels.
When the water desalination system starts, also need further remove oxygen and CO at clean seawater under the driving of 8a sea-water pump in deoxygenation decarbonizing tower 9
2Gas approximately contains 3.5% salinity because of seawater, have very strong corrodibility, and the oxygen that contains in seawater and CO2 gas can be accelerated the corrosion of equipment, must remove as possible.
during sea water desaltination, the heat energy that sunlight is converted into heat-conducting medium in 1a is collected in sun power heat build-up on daytime field 1, and store heat energy in heat storage can 2 by heat-conducting medium, hydrothermal solution pump 2a drives heat-conducting medium and flows to from 2 in interchanger 3b in salt water heater 3, the temperature of clean seawater is raise (be generally 55 ℃～120 ℃ all can), the present embodiment is set as 70 ℃, hot sea water is under the driving of adjustable speed sea-water pump 3a, transport in 1 grade of flasher 4 that (speed of regulating hot sea water pump 3a can be controlled the seawater flow of transporting to 1 grade of flasher 4, thereby can control 4 seawater liquid level height), during hot sea water process throttling set 4a, it is negative pressure in 4, pressure reduces suddenly, water in hot sea water is vaporized in a large number, become steam rising, the large grain seawater of carrying secretly in steam drips, running into defoamer is blocked, fall into bottom flasher, steam rising is to the flasher top, run into this condenser body 4d and discharge latent heat, a part is condensed into fresh water, drop in fresh water storage dish 4c, be flowed to the fresh water tank through pipeline, the uncooled steam of another part enters into the 4f interchanger of sea water cooler 4e, steam is again cooling by low temperature seawater, discharge latent heat, being condensed into fresh water confluxes and transports to the fresh water tank into the female pipe of fresh water.Meanwhile, the strong brine of 1 grade of flasher bottom, can automatically enter 2 grades of flashers, this is the running due to the vacuum pump 5a of fresh water tank 5 tops settings, make between 1,2 grade of flasher to exist pressure difference to form, strong brine enters and can repeat again 4a in 2 grades of flashers to the whole process output fresh water of 4f.Until final stage flasher, the present embodiment final stage is 9 grades of flashers according to above-mentioned repetitive process.The strong brine of final stage flasher finally drives through brinepump 5b and transports to the further processing and utilization of salt manufacturing factory.Enter the seawater of 1 grade of flasher in this process, go through 9 grades of still-process, approximately have 40% vaporization and condensation to be converted into fresh water.
Be not that the heating seawater temperature is more high better in sea water desaltination, sharply fouling on equipment of the salinity when seawater is heated to 75 ℃～78 ℃ in seawater (sodium ion and calcium, magnesium ion) meeting affects the heat transfer of equipment, lowers efficiency.If can be heated to 120 ℃ of non-scalings after adding Scale inhibitors in seawater, cost again use but the later stage removes these materials.Therefore in the present embodiment preferred sea water desaltination avoid the optimum temps parameter of fouling should be 70 ℃ of left and right or ± 70 ℃, can certainly carry out sea water desaltination of the present utility model in other temperature in 55 ℃～70 ℃ and 70 ℃～120 ℃ scopes, just comprehensive benefit is good not as ± 70 ℃.
advantage of the present utility model: one is 275 ℃～395 ℃ (take thermal oils as medium) or 178 ℃～610 ℃ (take melting salt as medium) because of the high efficiency operation optimum temps of solar energy collectors parameter (optimal operating parameter of solar energy light gathering and heat collecting field at present), the utility model adopts high-efficiency solar heat collector heating heat-conducting medium (as thermal oil for this reason, silicone oil, paraffin wax, melting salt) can satisfy the temperature operating parameter of above-mentioned solar energy collectors, go to heating seawater to 70 ℃ left and right with heat-conducting medium again, both can avoid the equipment scaling problem of solar energy collectors direct heating seawater, making seawater flash distillation desalting plant operate in the optimum temps parameter can make again sun power heat build-up equipment operate in optimum parameter, reach the maximizing the benefits of collecting solar heat.
Its two, general fresh water factory needed uninterruptedly provide sweet water in 24 hours, by heat-conducting medium (as thermal oil, silicone oil, paraffin wax, melting salt) storage solar heat energy, just can make the evening also can heating seawater, uninterruptedly produced fresh water.
Adopt the multistage flash evaporation structure of the present embodiment, owing to having adopted efficient solar energy light gathering and heat collecting equipment, can efficiently collect the sun power of relative dispersion, complete the heating evaporation to seawater, the sea water desaltination rate is up to 40%, and can store sun power be used for night during without sunlight continuous operation produce fresh water, output fresh water quality better reaches drinking water standard.And the main a large amount of clean energy sun power that use, desalting process is environmentally friendly, and is efficient, output is large.
Above disclosed is only preferred embodiment of the present utility model, certainly can not limit with this interest field of the utility model, and the equivalence of therefore doing according to the utility model claim changes, and still belongs to protection domain of the present utility model.
Claims (7)
1. the sea water desalinating plant of a solar energy continuous heat supply, system forms by seawater purification system, water desalination; It is characterized in that: the water desalination system mainly comprises solar light-condensing and heat-collecting device, solar heat-preservation tank, clean salt water heater and one-level sea water flash steaming device at least, and the sea water flash steaming device mainly is made of flasher body and sea water cooler; Wherein, the heat-conducting medium chamber of solar light-condensing and heat-collecting device is sealed in turn with heat-conducting medium interchanger in solar heat-preservation tank and clean salt water heater and is communicated with formation heat-conducting medium circulating path; The total clean seawer outlet of seawater purification system is communicated with respectively with clean salt water heater and sea water cooler; The seawer outlet of clean salt water heater is communicated with the flasher body; The flasher body arranges strong brine outlet, water outlet and vapour outlet, together come together in the fresh water house steward with water outlet after the vapor heat exchanger of vapour outlet in sea water cooler, the closed fresh water storage tank of fresh water house steward end is communicated with vacuum pump, strong brine outlet and salt manufacturing factory pipeline communication; Be communicated with salt water heater after the seawer outlet of sea water cooler this condenser body in the flasher body; When having at least two-stage sea water flash steaming device, the outlet of the strong brine of prime flasher body is communicated with subordinate flasher body, and the strong brine of last step flasher body exports and salt manufacturing factory pipeline communication; Flasher body internal pressures at different levels reduce step by step successively and form negative pressure.
2. sea water desalinating plant according to claim 1, it is characterized in that: between clean salt water heater seawer outlet and flasher body, the adjustable hot sea water pump of rotating speed is set, clean salt water heater seawer outlet is through being communicated with throttling set on the flasher body after the hot sea water pump, and throttling set is positioned on liquid level; Defoamer is set above flasher body interior, throttling set, above defoamer, fresh water storage dish is set, on fresh water storage dish, this condenser body is set; Vapour outlet is positioned at the flasher bodies top, and water outlet is positioned on fresh water storage dish, and the strong brine outlet is positioned under throttling set.
3. sea water desalinating plant according to claim 1 and 2, it is characterized in that: in clean salt water heater, seawater temperature sensor and standby interchanger are set also, the thermal source of described standby interchanger is hot oil furnace, electrical heater, residual heat from boiler fume or steam turbine exhaust steam residual heat.
4. sea water desalinating plant according to claim 1, is characterized in that: between the interchanger in solar heat-preservation tank and clean salt water heater, the hydrothermal solution pump is set.
5. according to claim 1 or 4 described sea water desalinating plants, it is characterized in that: solar light-condensing and heat-collecting device is tower type solar heat collector or paraboloid trough type vacuum tube collector or glass vacuum pipe heat collector or heat pipe vacuum tube hot collector.
6. sea water desalinating plant according to claim 1, it is characterized in that: seawater purification system is the stage purification system, comprises in turn the extracting seawater well that carries out coarse filtration, seawater sterilization settling pond, is equiped with the multi-ultrafiltration pond of activated carbon filtering layer and multifilament filter core layer and the seawater deoxygenation decarbonizing tower that is used for the deoxygenation decarburization; Clean seawater pond is set between multi-ultrafiltration pond and seawater deoxygenation decarbonizing tower; Seawater deoxygenation decarbonizing tower is communicated with total clean seawer outlet; Extracting seawater well is communicated with seawater sterilization settling pond by seawater lift pump, seawater sterilization settling pond is communicated with the multi-ultrafiltration pond by a seawater transhipment pump, the multi-ultrafiltration pond is communicated with seawater pond only by another seawater transhipment pump, clean seawater pond is communicated with seawater deoxygenation decarbonizing tower by the 3rd sea-water pump, and seawater deoxygenation decarbonizing tower is communicated with total clean seawer outlet by clean sea-water pump; Be added with disinfectant and flocculation agent in seawater sterilization settling pond.
7. according to claim 1 or 6 described sea water desalinating plants, it is characterized in that: extracting seawater well is built on the sandy beach, and well head is positioned at seawater highest high water waterline top, and the shaft bottom face is positioned at number formulary rice under the time of low water sea level; The borehole wall adopts porous concrete structure, and the borehole wall is outward rubble, and the outer sand grains by the sandy beach of rubble is filled.
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| CN201220722859XU CN203006975U (en) | 2012-12-25 | 2012-12-25 | Solar continuous heat supply seawater desalination device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976427A (en) * | 2012-12-25 | 2013-03-20 | 中盈长江国际新能源投资有限公司 | Seawater desalting plant continuously supplied with solar heat and method thereof |
| CN103990372A (en) * | 2014-04-28 | 2014-08-20 | 天津大学 | System using solar energy for seawater desalination to assist coal-fired power generation for carbon capture by ammonia method |
| CN110217846A (en) * | 2019-07-03 | 2019-09-10 | 金盛海洋科技有限公司 | A kind of UTILIZATION OF VESIDUAL HEAT IN seawater desalination system |
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2012
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976427A (en) * | 2012-12-25 | 2013-03-20 | 中盈长江国际新能源投资有限公司 | Seawater desalting plant continuously supplied with solar heat and method thereof |
| WO2014101580A1 (en) * | 2012-12-25 | 2014-07-03 | 中盈长江国际新能源投资有限公司 | Seawater desalting apparatus and method using solar energy for continuously supplying heat |
| CN103990372A (en) * | 2014-04-28 | 2014-08-20 | 天津大学 | System using solar energy for seawater desalination to assist coal-fired power generation for carbon capture by ammonia method |
| CN110217846A (en) * | 2019-07-03 | 2019-09-10 | 金盛海洋科技有限公司 | A kind of UTILIZATION OF VESIDUAL HEAT IN seawater desalination system |
| CN110217846B (en) * | 2019-07-03 | 2022-02-22 | 金盛海洋科技有限公司 | Waste heat utilization seawater desalination system |
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