CN105502780A - Sea water desaltation technology with efficient combined steam source - Google Patents
Sea water desaltation technology with efficient combined steam source Download PDFInfo
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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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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
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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
- C02F1/5209—Regulation methods for flocculation or precipitation
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- 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
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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
- C02F2001/5218—Crystallization
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- 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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- C02F2301/00—General aspects of water treatment
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention relates to a sea water desaltation technology with an efficient combined steam source. The steam source comprises a solar steam boiler and a fuel steam boiler, wherein steam supply quantities and steam supply proportions of the solar steam boiler and the fuel steam boiler are adjusted via steam adjusting equipment. The sea water desaltation technology comprises a low-temperature multiple-effect evaporation sea water desaltation step and a strong brine multiple-effect evaporation salt separation step. According to the technology, solar energy and conventional steam are combined to supply a heat source, and the multiple-effect evaporation sea water desaltation step and the strong brine multiple-effect evaporation salt separation step are combined organically to utilize heat rationally. As solar energy is utilized ingeniously, energy sources are greatly saved, and the environment-friendly pressure and the wastewater treatment cost are reduced.
Description
Technical field
The present invention relates to field of sea water desalting technology, especially a kind of desalination process with efficient combination vapour source.
Background technology
China is the country of a water resources critical shortage, and water resources ownership per capita is 2840 cubic metres, only has 1/4 of world average level.Therefore China is the country of a serious water shortage.Meanwhile, the Freshwater resources spatial and temporal distributions of China is extremely uneven, and water pollution exacerbates the deficient degree that China can utilize Freshwater resources.While resources water shortage, China's economic growth is fast, and the size of population is large, and the level of urbanization improves constantly, and makes water resources breach increasing, and this has become the bottleneck hindering Chinese society Sustainable development.Current water shortage coverage rate is almost throughout the whole nation, and especially northern area water shortage problem is quite serious, and water shortage has become a major issue of puzzlement industrial enterprise prodution and development.And there is the shoreline of more than 1.8 ten thousand kilometer long coastland, give full play to the advantage that these areas are on the verge of ocean, the road walking sea water desaltination is the important channel solving water shortage problem.
Namely sea water desaltination utilizes sea water desalinization to produce fresh water.Be the increment technique of increasing income realizing water resources utilization, fresh water total amount can be increased, and not by space-time and weather effect, water quality is good, price is gradually reasonable, can ensure the stable water supply such as coastal Drinking Water for Residents and Industrial Boiler moisturizing.The process obtaining fresh water from seawater is exactly sea water desaltination.Containing a large amount of salt and multiple element in seawater, total salt amount is about 3.5%, wherein mainly containing positively charged ions such as sodium, magnesium, calcium, and chlorine root, sulfate radical, bicarbonate radical (comprising carbonate), etc. negatively charged ion.
The desalination technology extensively adopted in the world has now reached tens kinds, but reach commercial-scale and mainly contain reverse osmosis method and distillation method, " embrane method " and " hot method " namely often said, distillation desalination techniques is divided into again multistage flash evaporation, multi-effect distilling and pressure steam distillation three kinds.Reverse osmosis method is with fastest developing speed over nearly 20 years in desalination technology, be large-scale, medium-sized or undersize item all applicable, except Gulf states, reverse osmosis technology is the first-selection of other regional large and medium-sized sea water desaltination project.Multistage flash evaporation, still holds pride of place at present in world's sea water desaltination ultimate production, and technology maturation, security be high, it is large to run elasticity, is applicable to large-scale or ultra-large type project, is mainly arranged on Gulf states.Multi-effect distilling is according to the height of service temperature, and top temperature is low temperature multiple-effect distillation at 65-70 DEG C, and being called for short low-temperature multi-effect, is current competitive hot method desalination technology.Pressure steam distillation, refer to and re-use after utilizing electricity or steam to carry out adiabatic compression to secondary steam, energy consumption is lower, but scale is generally little, mostly is daily output kiloton.
In the middle of above method, nearly ten years, reverse osmosis method sea water desaltination development trend is very fast, and has occurred the large-scale sea water desalinating plant producing ton daily.But at present in the world, distillation method (instant heating method) is still higher for the ratio shared by sea water desaltination aspect.Distillation method is compared with reverse osmosis method: 1) energy consumption: from the direct energy consumption of desalination, and reverse osmosis method is obviously better than the distillation method of single-action, but the not obvious distillation method being better than (thermoelectricity makes water) of economic benefits and social benefits.And due to the life-span of reverse osmosis membrane short, change film costly, film inherently reflects energy consumption.Concerning distillation method, the direct energy consumption of process, different areas difference is very large, needs to carry out technology and economy comparison and determines.2) the water total cost processed of sea water desaltination: due to the life-span of film and the restriction of film device, makes embrane method still be on a sticky wicket in extensive process seawater.Because the water producing cost of reverse osmosis method, the disadvantageous effect by membrane lifetime and unit scale has exceeded the benefit that less energy-consumption brings, and when it is generally acknowledged that sea water desalinating plant capacity exceedes daily output 6000t fresh water, the distillation method of binocular is more more economical than reverse osmosis method.3) pre-treatment of seawater: the seawater entering water distilling apparatus, without the need to carrying out pre-treatment, only arranges sea water filter net.And the seawater entering sea-water reverse osmose apparatus need carry out the pre-treatment such as flocculate and clarify, filtration and chlorination.And because the water use efficiency of reverse osmosis is low, so pretreatment system is huge, invest also higher, floor space is also large.4) other auxiliary facilities: for new power plant construction, distillation method needs to start steam, and therefore the capacity of starting trouble should consider the needs meeting desalination plant, and the make up water of starting trouble should consider that a set of independent water processing establishment is for starting; In addition, owing to there is no stand-by facilities, need water source of fresh water as the alternate source of process water.And embrane method does not need to start steam, during unit starting, feedwater water temperature is lower, and exerting oneself on desalting plant slightly affects, and does not affect the startup water of unit, does not need to consider extra startup facility; Desalting plant considers to have enough for subsequent usely to exert oneself, and can meet the needs with water during overhaul of the equipments.
Can find out through above analysis, if energy Appropriate application thermal source, then hot method desalination process also will improve the market competitiveness greatly.
Current hot method desalination process is higher due to its energy consumption, is unfavorable for resource utilization Appropriate application, and needs a series of auxiliary facility, seriously constrains its development.For above problem, this technology is intended to exploitation one and sun power and conventional steam is combinationally used supply thermal source, divides salt technique to organically combine desalting seawater through multi-effect evaporation technique and strong brine multiple-effect evaporation and crystallisation by cooling, to reach the method for Appropriate application thermal source.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of desalination process with efficient combination vapour source, sun power and conventional steam are combinationally used supply thermal source, divide salt technique organic assembling by desalting seawater through multi-effect evaporation technique and strong brine multiple-effect evaporation and freezing and crystallizing, make the method for heat Appropriate application.Ingeniously can utilize sun power save energy greatly by the method, reduce environmental protection pressure and cost for wastewater treatment.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
There is the desalination process of efficient combination vapour source, described desalination process comprises low-temperature multi-effect evaporation seawater desalinization operation and strong brine multiple-effect evaporation divides salt operation, the vapour source of desalination process is solar energy steam boiler and fueled steam boiler, and described solar energy steam boiler and fueled steam boiler are by Steam conditioning device steam regulation feed rate and steam supply ratio.
The further improvement of technical solution of the present invention is: described low-temperature multi-effect evaporation seawater desalinization operation adopts the level pipe sprinkling falling-film evaporator of series connection to carry out multiple-effect evaporation to seawater, concentrates gradually, obtains desalination water and the strong brine containing foreign ion; To containing in the strong brine of foreign ion, throw in caustic soda powder, fully react and filter at normal temperatures, the magnesium ion in removing strong brine, filters, obtains primary purification strong brine; To in primary purification strong brine, pass into carbon dioxide, fully react and filter at normal temperatures, the calcium ion in removing primary purification strong brine, filters, obtains secondary-cleaned strong brine.
The further improvement of technical solution of the present invention is: described strong brine multiple-effect evaporation divides salt operation to comprise,
1) secondary-cleaned strong brine is heated to 50 ~ 150 DEG C, carries out single vaporization crystallization, the heat filtering when temperature is 50 ~ 100 DEG C, obtain a mother liquor and sodium sulfate crystal;
2) mother liquor is cooled to 0 ~-15 DEG C, carries out a crystallisation by cooling, filter, obtain the mixed salt of secondary mother liquid and sal glauberi and two water sodium-chlor, mixed salt returns in secondary-cleaned strong brine and regulates chlorion and sulfate ion ratio;
3) secondary mother liquid being heated to 50 ~ 150 DEG C, carrying out double evaporation-cooling crystallization, filtering when temperature is 30 ~ 50 DEG C, obtaining crystal waste and sodium chloride crystal.
The further improvement of technical solution of the present invention is: the steam flow in described desalination process is, described solar energy steam boiler and the interior steam produced of fueled steam boiler, the steam supply ratio of solar energy steam boiler and fueled steam boiler is regulated by Steam conditioning device, and according in desalination process to the demand of steam delivery volume, the primary steam supply strong brine multiple-effect evaporation confessed by Steam conditioning device divides single vaporization crystallisation process in salt operation and double evaporation-cooling crystallisation process, primary steam changes secondary steam into, secondary steam is supplied low-temperature multi-effect evaporation seawater desalinization operation.
The further improvement of technical solution of the present invention is: the algorithm of described Steam conditioning device is,
A) single vaporization crystallisation process is set, pressure that double evaporation-cooling crystallisation process, low-temperature multi-effect evaporation seawater desalinization operation need steam respectively;
B) Steam conditioning device Dynamic Acquisition solar energy steam boiler and fueled steam boiler confess the pressure of steam;
C) steam is confessed according to the preferential solar energy steam boiler that uses, it is reserve steam source that fueled steam boiler confesses steam, regulate the steam supply ratio of solar energy steam boiler and fueled steam boiler, confess primary steam to single vaporization crystallisation process and double evaporation-cooling crystallisation process;
D) obtain the pressure of secondary steam, the supplementary steam using solar energy steam boiler and/or fueled steam boiler to confess, is increased to vapor pressure needed for low-temperature multi-effect evaporation seawater desalinization operation by the pressure of secondary steam.
The further improvement of technical solution of the present invention is: use the pressure of steam to be 0.4 ~ 0.5MPa in described single vaporization crystallisation process and double evaporation-cooling crystallisation process.
The further improvement of technical solution of the present invention is: needed for described low-temperature multi-effect evaporation seawater desalinization operation, the pressure of steam is 0.03 ~ 0.67MPa.
Owing to have employed technique scheme, the technical progress that the present invention obtains is:
Technical scheme of the present invention, compared with conventional heat sources, utilizes sun power clean energy greatly can reduce energy consumption, effectively avoids environmental pollution.Coal firing boiler generating efficiency about 40%, both share the drawback avoiding and be used alone solar heat efficiency low (about 15%).The combination of sun power and common thermal source, make common thermal source multiple electricity on daytime, night generates electricity less, plays Peak Load Adjustment, avoids energy storage, makes Energy harvesting more reasonable.
Processing method of the present invention, when daytime is sunny, utilizes solar heat boiler develops steam vapor, and as the thermal source of strong brine, common coal firing boiler then can be used for generating, for peak times of power consumption by steam saving; When night is without the solar time, then utilize common thermal source to produce steam energy supply, generate electricity less, to adapt to low power consumption simultaneously.
In recent years, the major progress of multiple effective evaporation method, in the exploitation of low-temperature multi-effect operative technique, to reduce fouling, corrosion, reduces costs.Therefore, the steam of 0.4 ~ more than the 0.5MPa that sun power or plain cylindrical furnace produce first supplies strong brine evaporation and point salt technique, the multiple-effect evaporation of seawater workshop section of the secondary low-voltage steam supply leading portion of generation, to realize low-temperature multi-effect operation.Utilize this scheme, a large amount of conventional energy resourcess and fossil oil can be saved, also can play the effect of power plant's peak regulation round the clock.
Remove the foreign ions such as calcium-magnesium removing subsequently, the strong brine after softening enters simple substance Ti Yan workshop section.Daytime, time sunny, utilizes solar heat boiler develops steam vapor, and as the thermal source of strong brine, common coal firing boiler then can be used for generating, for peak times of power consumption by steam saving; When night is without the solar time, then utilize common thermal source to produce steam energy supply, generate electricity less, to adapt to low power consumption simultaneously.Sun power and common coal firing boiler fully utilize heat supply to strong brine simple substance Ti Yan workshop section, and the secondary vapour that strong brine workshop section produces can use as the thermal source of the less sea water desaltination workshop section of the elevation of boiling point.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
Embodiment 1
The desalination process with efficient combination vapour source of the present invention, desalination process of the present invention comprises low-temperature multi-effect evaporation seawater desalinization operation and strong brine multiple-effect evaporation divides salt operation.The vapour source of desalination process is solar energy steam boiler and fueled steam boiler, and solar energy steam boiler and fueled steam boiler are by Steam conditioning device steam regulation feed rate and steam supply ratio.
Low-temperature multi-effect evaporation seawater desalinization operation of the present invention is that seawater, after multiple-effect evaporation, concentrates gradually, obtains the strong brine containing foreign ion, removes the foreign ions such as calcium-magnesium removing subsequently, and the strong brine after softening enters simple substance Ti Yan workshop section.To containing in the strong brine of foreign ion, throw in caustic soda powder, fully react and filter at normal temperatures, the magnesium ion in removing strong brine, filters, obtains primary purification strong brine.To in primary purification strong brine, pass into carbon dioxide, fully react and filter at normal temperatures, the calcium ion in removing primary purification strong brine, filters, obtains secondary-cleaned strong brine.
Strong brine multiple-effect evaporation of the present invention divides salt operation to comprise,
1) secondary-cleaned strong brine is heated to 100 DEG C, carries out single vaporization crystallization, filter when temperature is 75 DEG C, obtain a mother liquor and sodium sulfate crystal;
2) mother liquor is cooled to-10 DEG C, carries out a crystallisation by cooling, filter, obtain the mixed salt of secondary mother liquid and sal glauberi and two water sodium-chlor, mixed salt returns in secondary-cleaned strong brine and regulates chlorion and sulfate ion ratio;
3) secondary mother liquid is heated to 100 DEG C, carries out double evaporation-cooling crystallization, filter when temperature is 30 ~ 50 DEG C, obtain crystal waste and sodium chloride crystal.
Steam flow in desalination process of the present invention is, solar energy steam boiler and the interior steam produced of fueled steam boiler, the steam supply ratio of solar energy steam boiler and fueled steam boiler is regulated by Steam conditioning device, and according in desalination process to the demand of steam delivery volume, the primary steam supply strong brine multiple-effect evaporation confessed by Steam conditioning device divides single vaporization crystallisation process in salt operation and double evaporation-cooling crystallisation process, primary steam changes secondary steam into, secondary steam is supplied low-temperature multi-effect evaporation seawater desalinization operation.
The algorithm of Steam conditioning device of the present invention is,
A) single vaporization crystallisation process is set, pressure that double evaporation-cooling crystallisation process, low-temperature multi-effect evaporation seawater desalinization operation need steam respectively; In the present embodiment, single vaporization crystallisation process needs that the pressure of steam is 0.2MPa, the pressure of double evaporation-cooling crystallisation process is 0.2MPa, low-temperature multi-effect evaporation seawater desalinization operation needs the pressure of steam to be 0.1MPa.
B) Steam conditioning device Dynamic Acquisition solar energy steam boiler and fueled steam boiler confess the pressure of steam; In the present embodiment, the pressure that solar energy steam boiler confesses steam is 0.5MPa, and fueled steam boiler confesses the pressure 0.5MPa of steam.
C) steam is confessed according to the preferential solar energy steam boiler that uses, fueled steam boiler confesses steam for supplementing vapour source, regulate the steam supply ratio of solar energy steam boiler and fueled steam boiler, in the present embodiment, supply ratio is 3:1, confess the primary steam of 0.4 ~ 0.5MPa to single vaporization crystallisation process and double evaporation-cooling crystallisation process, be down to the 0.2MPa pressure of required steam in single vaporization crystallisation process and double evaporation-cooling crystallisation process subsequently by variable valve.
D) pressure of secondary steam is obtained, in the present embodiment, the pressure of secondary steam is 0.08MPa, the steam using solar energy steam boiler and/or fueled steam boiler to confess, is increased to vapor pressure needed for low-temperature multi-effect evaporation seawater desalinization operation by the pressure of secondary steam.Namely needed for low-temperature multi-effect evaporation seawater desalinization operation, the pressure of steam is 0.1MPa.
Embodiment 2
The desalination process with efficient combination vapour source of the present invention, desalination process of the present invention comprises low-temperature multi-effect evaporation seawater desalinization operation and strong brine multiple-effect evaporation divides salt operation.The vapour source of desalination process is solar energy steam boiler and fueled steam boiler, and solar energy steam boiler and fueled steam boiler are by Steam conditioning device steam regulation feed rate and steam supply ratio.
Low-temperature multi-effect evaporation seawater desalinization operation of the present invention is that seawater, after multiple-effect evaporation, concentrates gradually, obtains the strong brine containing foreign ion, removes the foreign ions such as calcium-magnesium removing subsequently, and the strong brine after softening enters simple substance Ti Yan workshop section.To containing in the strong brine of foreign ion, throw in caustic soda powder, fully react subsequent filtration at 30 DEG C, the magnesium ion in removing strong brine, filters, obtains primary purification strong brine.To in primary purification strong brine, pass into carbon dioxide, fully react subsequent filtration at 30 DEG C, the calcium ion in removing primary purification strong brine, filters, obtains secondary-cleaned strong brine.
Strong brine multiple-effect evaporation of the present invention divides salt operation to comprise,
1) secondary-cleaned strong brine is heated to 125 DEG C, carries out single vaporization crystallization, filter when temperature is 100 DEG C, obtain a mother liquor and sodium sulfate crystal;
2) mother liquor is cooled to-5 DEG C, carries out a crystallisation by cooling, filter, obtain the mixed salt of secondary mother liquid and sal glauberi and two water sodium-chlor, mixed salt returns in secondary-cleaned strong brine and regulates chlorion and sulfate ion ratio;
3) secondary mother liquid being heated to 100 DEG C, carrying out double evaporation-cooling crystallization, filtering when temperature is 40 DEG C, obtaining crystal waste and sodium chloride crystal.
Steam flow in desalination process of the present invention is, solar energy steam boiler and the interior steam produced of fueled steam boiler, the steam supply ratio of solar energy steam boiler and fueled steam boiler is regulated by Steam conditioning device, and according in desalination process to the demand of steam delivery volume, the primary steam supply strong brine multiple-effect evaporation confessed by Steam conditioning device divides single vaporization crystallisation process in salt operation and double evaporation-cooling crystallisation process, primary steam changes secondary steam into, secondary steam is supplied low-temperature multi-effect evaporation seawater desalinization operation.
The algorithm of Steam conditioning device of the present invention is,
A) single vaporization crystallisation process is set, pressure that double evaporation-cooling crystallisation process, low-temperature multi-effect evaporation seawater desalinization operation need steam respectively; In the present embodiment, single vaporization crystallisation process needs that the pressure of steam is 0.5MPa, the pressure of double evaporation-cooling crystallisation process is 0.243MPa, low-temperature multi-effect evaporation seawater desalinization operation needs the pressure of steam to be 0.25MPa.
B) Steam conditioning device Dynamic Acquisition solar energy steam boiler and fueled steam boiler confess the pressure of steam; In the present embodiment, the pressure that solar energy steam boiler confesses steam is 0.5MPa, and fueled steam boiler confesses the pressure 0.5MPa of steam.
C) steam is confessed according to the preferential solar energy steam boiler that uses, fueled steam boiler confesses steam for supplementing vapour source, regulate the steam supply ratio of solar energy steam boiler and fueled steam boiler, in the present embodiment, supply ratio is 4:1, confesses primary steam to single vaporization crystallisation process and double evaporation-cooling crystallisation process; The pressure of steam is used to be 0.4 ~ 0.5MPa in single vaporization crystallisation process and double evaporation-cooling crystallisation process.
D) pressure of secondary steam is obtained, in the present embodiment, the pressure of secondary steam is 0.15MPa, the steam using solar energy steam boiler and/or fueled steam boiler to confess, is increased to vapor pressure needed for low-temperature multi-effect evaporation seawater desalinization operation by the pressure of secondary steam.Namely needed for low-temperature multi-effect evaporation seawater desalinization operation, the pressure of steam is 0.2 ~ 0.5MPa.
Claims (7)
1. there is the desalination process of efficient combination vapour source, it is characterized in that: described desalination process comprises low-temperature multi-effect evaporation seawater desalinization operation and strong brine multiple-effect evaporation divides salt operation, the vapour source of desalination process is solar energy steam boiler and fueled steam boiler, and described solar energy steam boiler and fueled steam boiler are by Steam conditioning device steam regulation feed rate and steam supply ratio.
2. the desalination process with efficient combination vapour source according to claim 1, it is characterized in that: described low-temperature multi-effect evaporation seawater desalinization operation adopts the level pipe sprinkling falling-film evaporator of series connection to carry out multiple-effect evaporation to seawater, concentrate gradually, obtain desalination water and the strong brine containing foreign ion; To containing in the strong brine of foreign ion, throw in caustic soda powder, fully react and filter at normal temperatures, the magnesium ion in removing strong brine, filters, obtains primary purification strong brine; To in primary purification strong brine, pass into carbon dioxide, fully react and filter at normal temperatures, the calcium ion in removing primary purification strong brine, filters, obtains secondary-cleaned strong brine.
3. the desalination process with efficient combination vapour source according to claim 2, is characterized in that: described strong brine multiple-effect evaporation divides salt operation to comprise,
1) secondary-cleaned strong brine is heated to 50 ~ 150 DEG C, carries out single vaporization crystallization, the heat filtering when temperature is 50 ~ 100 DEG C, obtain a mother liquor and sodium sulfate crystal;
2) mother liquor is cooled to 0 ~-15 DEG C, carries out a crystallisation by cooling, filter, obtain the mixed salt of secondary mother liquid and sal glauberi and two water sodium-chlor, mixed salt returns in secondary-cleaned strong brine and regulates chlorion and sulfate ion ratio;
3) secondary mother liquid being heated to 50 ~ 150 DEG C, carrying out double evaporation-cooling crystallization, filtering when temperature is 30 ~ 50 DEG C, obtaining crystal waste and sodium chloride crystal.
4. the desalination process with efficient combination vapour source according to any one of claim 1 ~ 3, it is characterized in that: the steam flow in described desalination process is, described solar energy steam boiler and the interior steam produced of fueled steam boiler, the steam supply ratio of solar energy steam boiler and fueled steam boiler is regulated by Steam conditioning device, and according in desalination process to the demand of steam delivery volume, the primary steam supply strong brine multiple-effect evaporation confessed by Steam conditioning device divides single vaporization crystallisation process in salt operation and double evaporation-cooling crystallisation process, primary steam changes secondary steam into, secondary steam is supplied low-temperature multi-effect evaporation seawater desalinization operation.
5. the desalination process with efficient combination vapour source according to claim 4, is characterized in that: the algorithm of described Steam conditioning device is,
A) single vaporization crystallisation process is set, pressure that double evaporation-cooling crystallisation process, low-temperature multi-effect evaporation seawater desalinization operation need steam respectively;
B) Steam conditioning device Dynamic Acquisition solar energy steam boiler and fueled steam boiler confess the pressure of steam;
C) steam is confessed according to the preferential solar energy steam boiler that uses, it is reserve steam source that fueled steam boiler confesses steam, regulate the steam supply ratio of solar energy steam boiler and fueled steam boiler, confess primary steam to single vaporization crystallisation process and double evaporation-cooling crystallisation process;
D) obtain the pressure of secondary steam, the supplementary steam using solar energy steam boiler and/or fueled steam boiler to confess, is increased to vapor pressure needed for low-temperature multi-effect evaporation seawater desalinization operation by the pressure of secondary steam.
6. the desalination process with efficient combination vapour source according to claim 5, is characterized in that: use the pressure of steam to be 0.4 ~ 0.5MPa in described single vaporization crystallisation process and double evaporation-cooling crystallisation process.
7. the desalination process with efficient combination vapour source according to claim 5, is characterized in that: needed for described low-temperature multi-effect evaporation seawater desalinization operation, the pressure of steam is 0.03 ~ 0.67MPa.
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Citations (5)
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| CN102329037A (en) * | 2011-10-24 | 2012-01-25 | 哈尔滨锅炉厂有限责任公司 | Low-temperature multi-effect evaporation sea water desalting device and sea water desalting method |
| CN102493931A (en) * | 2011-12-12 | 2012-06-13 | 武汉凯迪工程技术研究总院有限公司 | Solar energy and methane energy complementation-based electricity generating equipment |
| CN103408179A (en) * | 2013-08-22 | 2013-11-27 | 天津滨瀚环保科技发展有限公司 | Production method for desalting seawater by hot film coupling |
| CN104591464A (en) * | 2015-02-03 | 2015-05-06 | 石家庄工大化工设备有限公司 | Recycling method of high-salinity wastewater |
| CN104761094A (en) * | 2015-04-10 | 2015-07-08 | 中冶焦耐工程技术有限公司 | Method for processing coking wastewater employing efficient evaporation process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102329037A (en) * | 2011-10-24 | 2012-01-25 | 哈尔滨锅炉厂有限责任公司 | Low-temperature multi-effect evaporation sea water desalting device and sea water desalting method |
| CN102493931A (en) * | 2011-12-12 | 2012-06-13 | 武汉凯迪工程技术研究总院有限公司 | Solar energy and methane energy complementation-based electricity generating equipment |
| CN103408179A (en) * | 2013-08-22 | 2013-11-27 | 天津滨瀚环保科技发展有限公司 | Production method for desalting seawater by hot film coupling |
| CN104591464A (en) * | 2015-02-03 | 2015-05-06 | 石家庄工大化工设备有限公司 | Recycling method of high-salinity wastewater |
| CN104761094A (en) * | 2015-04-10 | 2015-07-08 | 中冶焦耐工程技术有限公司 | Method for processing coking wastewater employing efficient evaporation process |
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