CN201485353U - Low-temperature multi-effect seawater desalting device - Google Patents
Low-temperature multi-effect seawater desalting device Download PDFInfo
- Publication number
- CN201485353U CN201485353U CN2009201566247U CN200920156624U CN201485353U CN 201485353 U CN201485353 U CN 201485353U CN 2009201566247 U CN2009201566247 U CN 2009201566247U CN 200920156624 U CN200920156624 U CN 200920156624U CN 201485353 U CN201485353 U CN 201485353U
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- vaporizer
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- low
- temperature multi
- condenser
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- 239000013535 sea water Substances 0.000 title claims abstract description 67
- 238000011033 desalting Methods 0.000 title abstract description 14
- 239000013505 freshwater Substances 0.000 claims abstract description 31
- 239000012267 brine Substances 0.000 claims abstract description 12
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 12
- 239000006200 vaporizer Substances 0.000 claims description 78
- 238000010612 desalination reaction Methods 0.000 claims description 22
- 238000001704 evaporation Methods 0.000 claims description 10
- 230000008020 evaporation Effects 0.000 claims description 8
- 239000000284 extract Substances 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 4
- 239000011552 falling film Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 29
- 238000000034 method Methods 0.000 abstract description 26
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000004821 distillation Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 238000007701 flash-distillation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 238000002207 thermal evaporation Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000001256 steam distillation Methods 0.000 description 1
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Classifications
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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
Abstract
The utility model relates to a low-temperature multi-effect seawater desalting device, which comprises six-effect evaporators, a steam ejector (8), a condenser (14), a noncondensable gas abstraction device (1) and a strong brine heat exchanger (11), wherein the six-effect evaporators are sequentially connected with each other in series, the front four effects are of the backflow effects, and the rear two effects are the direct current effects. The seawater desalting device simplifies the process flow and lowers the equipment investment cost; in addition, the seawater desalting device improves the overall efficiency of seawater desalting and lowers the cost of freshwater production furthermore.
Description
Technical field
The utility model relates to a kind of sea water desalinating plant, particularly a kind of low-temperature multi-effect seawater desalination device.
Background technology
Sea water desaltination claims sea water desalinization again, is a kind of technological process of the salinity of seawater with acquisition fresh water that be used for removing.
The method for desalting seawater that forms industry size mainly contains reverse osmosis method and distillation method.The distillation sea water desalting method is to drop into the desalination method of industrial applications the earliest, compare with the reverse osmosis method method for desalting seawater, distillation method has advantages such as the low-grade heat that can utilize power plant and other factories, throughput low to the raw material seawater water quality requirement, device are big, be the main method of current sea water desaltination, account for more than 57% of method for desalting seawater overall market share.
The distillation sea water desalting method is divided into low-temperature multi-effect, multistage flash evaporation and three kinds of methods of pressure steam distillation, is to utilize heat energy that seawater is converted into high-quality fresh water.And low-temperature multiple-effect distillation is the novel method that just develops the 1980s.The low temperature multiple-effect distillation sea water desalting method is meant the about 70 degrees centigrade method for desalting seawater of high evaporation temperature of brinish, it is characterized in that a series of horizontal pipe falling film evaporation device being together in series and being divided into some effect groups, with evaporation and the condensation of a certain amount of steam input by repeatedly, thereby obtain being multiple times than the distilled water of heating steam amount.Its feature is that, process circulation power less demanding to the pre-treatment of raw material seawater consumes fresh water water quality height little, that produce.Therefore after this method is developed, just worldwide having obtained rapidly using widely, is one of method of the tool development prospect of sea water desaltination.What receive much concern at present is to find a kind of less energy-consumption to produce the sea water desalinating plant of high quality fresh water.Cutting down the consumption of energy is inevitable technical problem in the sea water desaltination, also is one of key factor that reduces the sea water desaltination cost; And for low temperature multiple-effect distillation and multistage flash evaporation sea water desalinating plant, one of key factor that cuts down the consumption of energy is how to use steam.
CN201144160Y discloses a kind of low-temperature multiple-effect distillation sea water desalting device that comprises airing system, water distribution system, n single-effect evaporator, fresh-water tank and dense water tank, and wherein, the living steam-in of airing system places on the middle single-effect evaporator.This equipment has improved heat utilization ratio, has saved the energy.CN2934211Y discloses a kind of sea water desaltination low-temperature multi-effect device, this device comprises tank body, be provided with the different some single-effect evaporators of vaporization temperature in the tank body, these some grades of vaporizers just are arranged in order by vaporization temperature, the generating tube inner chamber of temperature vaporizer at the highest level connects the thermal source steam system, wherein, it adopts the thermal source steam that solar heater produces.Though above-mentioned two kinds of devices have all reduced energy consumption to a certain extent, both common drawback are that the effect number of vaporizer is determined, contain the more sea water desalinating plant of significant figure and then make flow process complexity, equipment investment cost height, energy consumption height.
The utility model content
For overcoming above-mentioned shortcoming, the utility model provides a kind of improved low-temperature multi-effect seawater desalination device, is a kind of low-temperature multi-effect seawater desalination device of 4+2 type.This low-temperature multi-effect seawater desalination device has been simplified its method steps, has been reduced equipment investment cost; In addition, also further improved the overall efficiency of desalting equipment, and reduced and made the water cost.
This low-temperature multi-effect seawater desalination device comprises that six vaporizers (each is called an effect), condenser, non-condensable gas extract device, strong brine interchanger, strong brine pump, fresh water pump, seawater feeding pump.Six vaporizers are imitated to the 6th effect from the 1st and are connected successively, and wherein preceding four vaporizers are imitated for refluxing, and latter two vaporizer is the direct current effect; Arbitrary effect during steam ejector and 1-4 are imitated is connected, and the 6th imitates and terminally be connected with condenser, and non-condensable gas extracts device and is connected with condenser, so that non-condensable gas is extracted out from condenser.
The working process of this low-temperature multi-effect seawater desalination device may further comprise the steps: 1) apparatus system is vacuumized; 2) start the sea water supply pump, feed is in each vaporizer simultaneously; 3) start the strong brine pump, discharge the seawater that base of evaporator reaches certain liquid level; 4) start the vapour source valve, steam enters the 1st by steam ejector and imitates, make seawater wherein be subjected to thermal evaporation, each secondary steam that evaporates in imitating enters and placed in-line next effect of this effect, the condenser of the secondary steam access to plant system afterbody that the most last effect evaporates successively; 5) fresh water that condensation forms in each effect and condenser finally comes together in the effect of end, extracts out by being attached thereto the fresh water pump that connects.
As preferred embodiment of the present utility model, in above-mentioned low-temperature multi-effect seawater desalination device, the vapour outlet of the 4th vaporizer is connected with the 1st single-effect evaporator by steam ejector.
As preferred embodiment of the present utility model, in above-mentioned low-temperature multi-effect seawater desalination device, also comprise the fresh water interchanger, the seawater feeding pump is connected with condenser by the fresh water interchanger, and described fresh water interchanger is connected with fresh water pump.
As preferred embodiment of the present utility model, in above-mentioned low-temperature multi-effect seawater desalination device, described each vaporizer is the horizontal pipe falling film evaporation device.
The utility model compared with prior art has following advantage: flash distillation has substituted outer flash distillation of the prior art in (1) the utility model utilization, has simplified method steps, has reduced cost of investment; (2) the utility model adopts sextuple-effect evaporator to substitute n single-effect evaporator of the prior art (n=2～50), when realizing that effectively evaporating charging seawater and the contained steam of condensation is fresh water, reduce the n value scope of vaporizer, simplified flow process, reduced equipment cost; (3) the utility model further draws gas with the 4th single-effect evaporator rather than draws gas from the end effect, has taken into account the balance between injector efficient and the evaporator effectiveness, has improved the overall efficiency of desalination, has also reduced the cost of making fresh water simultaneously.
Description of drawings
Fig. 1 represents the schematic flow sheet of low-temperature multi-effect seawater desalination device.
Embodiment
Further specify low-temperature multi-effect seawater desalination device provided by the utility model below in conjunction with accompanying drawing, but therefore the utility model is not subjected to any restriction.
The used device of the utility model low-temperature multi-effect seawater desalination device comprises that vaporizer 7, vaporizer 6, vaporizer 5, vaporizer 4, vaporizer 3, vaporizer 2, steam ejector 8, condenser 14, non-condensable gas extract device 1, strong brine interchanger 11, fresh water interchanger 12, strong brine pump 10, fresh water pump 13, seawater feeding pump 9.Above-mentioned six vaporizers 7, vaporizer 6, vaporizer 5, vaporizer 4, vaporizer 3, vaporizer 2 are imitated to the 6th effect from the 1st and are connected successively, and vaporizer 7, vaporizer 6, vaporizer 5 and vaporizer 4 are imitated for refluxing, and vaporizer 3 and vaporizer 2 are the direct current effect; Vaporizer 7 head ends are connected with steam ejector 8, vaporizer 7 is connected with vaporizer 6, vaporizer 6 is connected with vaporizer 5, vaporizer 5 is connected with vaporizer 4, the secondary steam exit of vaporizer 4 is connected with steam ejector 8, vaporizer 4 is connected with vaporizer 3 simultaneously, and vaporizer 3 is connected with vaporizer 2, and vaporizer 2 ends are connected with condenser 14.Non-condensable gas extracts device 1 and is connected with condenser 14, to extract non-condensable gas out from condenser 14; Strong brine pump 10 is connected with water outlet with the 6th strong brine outlet of imitating respectively with fresh water pump 13, and 13 outlets are connected with fresh water pump with 10 outlets of the 6th strong brine pump of imitating respectively and strong brine interchanger 11 is with fresh water interchanger 12; Seawater feeding pump 9 is connected with fresh water interchanger 12, and fresh water interchanger 12 is connected with condenser 14, and condenser 14 is connected with six vaporizers 7, vaporizer 6, vaporizer 5, vaporizer 4, vaporizer 3, vaporizer 2 respectively.Above-mentioned mode of connection can be the mode of connection pipe connecting for example of any routine.
The working process of this low-temperature multi-effect seawater desalination device may further comprise the steps: 1) device is vacuumized the vacuum tightness that makes wherein and reach 90kPa; 2) start sea water supply pump 9, seawater again by condenser 14, is supplied with seawater to vaporizer 2-7 respectively at first by fresh water interchanger 12 then; 3) start strong brine pump 10, discharge the seawater that vaporizer 2-7 bottom reaches certain liquid level; 4) start the vapour source valve, steam enters vaporizer 7 by steam ejector 8, make seawater wherein be subjected to thermal evaporation, each secondary steam that evaporates in imitating enters and placed in-line next effect of this effect successively, wherein the 4th imitate the secondary steam evaporate and return the 1st by steam ejector 8 and imitate the condenser 14 of the secondary steam access to plant afterbody that the most last effect evaporates; 5) fresh water that condensation forms in each effect and condenser 14 finally comes together in the end effect (being vaporizer 2), extracts out by being attached thereto the fresh water pump 13 that connects.
Above-mentioned steam ejector 8 is imitated injection part secondary steam to the 1 from the 4th and is imitated, and the steam that provides with the external steam source is jointly as the 1st heating steam of imitating.The 1st effect is imitated to the 4th and being called the effect that refluxes, and the 5th, 6 effects are called the direct current effect, so whole device can be called 4+2 type low-temperature multi-effect seawater desalination device.Each is imitated and adopts advection mode feed, and the material seawater is dispensed to 6 effects simultaneously, imitates the top and evenly sprays on the horizontal evaporating tube bundle of vaporizer from each.The part evaporation of seawater becomes secondary steam, and enters next and imitate heating steam as next effect, and residual seawater compiles at each base of evaporator and is dense water.In each vaporizer, heating steam forms fresh water at its horizontal in-tube condensation when adding hot sea water; In condenser 14, heating steam condensation in pre-hot sea water forms fresh water.
Claims (4)
1. low-temperature multi-effect seawater desalination device, it is characterized in that: described device comprises vaporizer (7), vaporizer (6), vaporizer (5), vaporizer (4), vaporizer (3), vaporizer (2), steam ejector (8), condenser (14), non-condensable gas extracts device (1), strong brine interchanger (11), described vaporizer (7), vaporizer (6), vaporizer (5), vaporizer (4), vaporizer (3), vaporizer (2) is connected successively, described vaporizer (7), vaporizer (6), vaporizer (5) and vaporizer (4) are imitated for refluxing, described vaporizer (3) and vaporizer (2) are imitated for direct current, described steam ejector (8) and vaporizer (7), vaporizer (6), vaporizer (5) or vaporizer (4), be connected, described condenser (14) respectively with six vaporizers (7), vaporizer (6), vaporizer (5), vaporizer (4), vaporizer (3), vaporizer (2) is connected, and described non-condensable gas extracts device (1) and is connected with condenser (14).
2. low-temperature multi-effect seawater desalination device according to claim 1 is characterized in that: the vapour outlet of described vaporizer (4) is connected with described vaporizer (7) by steam ejector (8).
3. low-temperature multi-effect seawater desalination device according to claim 2, it is characterized in that: described low-temperature multi-effect seawater desalination device also comprises fresh water interchanger (12), seawater feeding pump (9) is connected with condenser (14) by fresh water interchanger (12), and described fresh water interchanger (12) is connected with fresh water pump (13).
4. low-temperature multi-effect seawater desalination device according to claim 3 is characterized in that: described each vaporizer is the horizontal pipe falling film evaporation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201566247U CN201485353U (en) | 2008-11-21 | 2009-06-03 | Low-temperature multi-effect seawater desalting device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820123781.3 | 2008-11-21 | ||
| CN2009201566247U CN201485353U (en) | 2008-11-21 | 2009-06-03 | Low-temperature multi-effect seawater desalting device |
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| Publication Number | Publication Date |
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| CN201485353U true CN201485353U (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201566247U Expired - Lifetime CN201485353U (en) | 2008-11-21 | 2009-06-03 | Low-temperature multi-effect seawater desalting device |
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| Country | Link |
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| CN (1) | CN201485353U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101734822B (en) * | 2008-11-21 | 2011-11-09 | 中国神华能源股份有限公司 | Low-temperature multi-effect seawater desalination device and use method |
| CN104973641A (en) * | 2014-04-08 | 2015-10-14 | 中石化洛阳工程有限公司 | Method of combination of flue gas low-temperature waste heat utilization and salt-containing waste water treatment |
-
2009
- 2009-06-03 CN CN2009201566247U patent/CN201485353U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101734822B (en) * | 2008-11-21 | 2011-11-09 | 中国神华能源股份有限公司 | Low-temperature multi-effect seawater desalination device and use method |
| CN104973641A (en) * | 2014-04-08 | 2015-10-14 | 中石化洛阳工程有限公司 | Method of combination of flue gas low-temperature waste heat utilization and salt-containing waste water treatment |
| CN104973641B (en) * | 2014-04-08 | 2017-07-14 | 中石化洛阳工程有限公司 | A kind of method that flue gas low-temperature Waste Heat Reuse is combined with processing brine waste |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100526 Effective date of abandoning: 20090603 |