CN102092805A - Low temperature multi-effect seawater desalting system - Google Patents
Low temperature multi-effect seawater desalting system Download PDFInfo
- Publication number
- CN102092805A CN102092805A CN2009102462786A CN200910246278A CN102092805A CN 102092805 A CN102092805 A CN 102092805A CN 2009102462786 A CN2009102462786 A CN 2009102462786A CN 200910246278 A CN200910246278 A CN 200910246278A CN 102092805 A CN102092805 A CN 102092805A
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- effect
- steam
- low
- temperature multi
- inlet plenum
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- 239000013535 sea water Substances 0.000 title claims abstract description 34
- 238000011033 desalting Methods 0.000 title description 8
- 230000000694 effects Effects 0.000 claims abstract description 23
- 238000001704 evaporation Methods 0.000 claims abstract description 13
- 239000012267 brine Substances 0.000 claims abstract description 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 5
- 238000004821 distillation Methods 0.000 claims description 13
- 230000008020 evaporation Effects 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 239000012153 distilled water Substances 0.000 abstract description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 abstract 2
- 238000010612 desalination reaction Methods 0.000 description 10
- 239000006200 vaporizer Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011552 falling film Substances 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
- 235000019600 saltiness Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000035900 sweating Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000003643 water by type Substances 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
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a novel low temperature multi-effect seawater evaporating system, which comprises a steam injection compressor, multiple effect evaporator heat exchange pipes, multiple effect sprayers, multiple effect air inlet chambers, multiple effect distilled water chambers and multiple effect brine chambers, wherein the steam outlet of the steam injection compressor is connected with the first-effect heat exchange pipe bundle air inlet chamber between the first effect and the second effect. The energy loss of steam is reduced.
Description
Technical field
The present invention relates to the sea water desaltination field, be specifically related to a kind of low-temperature multiple-effect seawater desalination system.
Background technology
Sea water desaltination is meant the most of salinity that removes in the seawater, makes water after the processing meet the general name of the water technology of water supply standard (as tap water, boiler feedwater and other process waters etc.).Low-temperature multiple-effect distillation sea water desalting technology (LT-MED) is the sophisticated desalination technology eighties in 20th century, its characteristics are can be in lower temperature (being lower than 70 ℃) with sea water by distillation, make high-quality product water, the water quality after the desalination can reach saltiness less than 10mg/L.
Modern large-scale low-temperature multi-effect distillation seawater desalination system adopts horizontal tube falling film formula vaporizer more, and a series of single-effect evaporators are together in series, and each vaporizer and process thereof are called an effect.Multi-effect Evaporation Processes is carried out under vacuum condition, and first pressure of imitating is the highest, and each pressure, temperature of imitating reduces successively later on.The secondary steam that previous evaporator evaporation is come out next vaporizer that induces one is a distilled water as heating steam and at next evaporator condensation, and so evaporation and condensing process carry out successively, can obtain being several times as much as the condensing capacity of single-effect evaporation.
The low-temperature multiple-effect distillation sea water desalting system often and the fuel-burning power plant unite construction, when the vapour source that provides when generating set has comparatively high temps, pressure, for effectively utilizing energy, reduce the heat of condensation loss of the steam in the multi-effect sea water desalting system end effect, steam-jet ejector (TVC) is introduced in the multi-effect sea water desalting system.TVC is an equipment of realizing that the low-pressure steam supercharging utilizes again, utilize the low-pressure steam that high pressure steam power is imitated (or middle a certain effect) generation with multi-effect sea water desalting system end to be compressed to higher pressure, being delivered to first imitates as system water vapor vapour source, can increase substantially multi-effect seawater desalination device and make the water economy, existing intake system is designed to steam-jet ejector (TVC) is introduced the front end of the steam inlet design of multi-effect seawater desalination device in vaporizer first effect, near vaporizer one side end cap, there is following defective in this design:
At first, the first single-effect evaporator front end admission, TVC expansion section exhaust vapour is long to vaporizer steam inlet connecting tube, and the steam flow resistance increases, and causes the steam energy loss; Secondly, the first single-effect evaporator front end admission, end cap is for advancing the sweating room sidewall, vapor temperature higher (general 70 ℃), big with the external environment temperature difference, heat lost by radiation is big.
Summary of the invention
At above technological deficiency, the invention provides a kind of new low-temperature multi-effect evaporation of seawater system, described system comprises: steam-jet ejector, each single-effect evaporator heat transfer tube, respectively imitate spray thrower, respectively imitate inlet plenum, each is imitated distillation hydroecium and respectively imitates brine chamber, it is characterized in that the vapour outlet of described steam-jet ejector and first imitating the heat-exchanging tube bundle inlet plenum and be connected between first and second is imitated.
As embodiment preferred, first of low-temperature multi-effect evaporation of seawater of the present invention system imitates inlet plenum and is positioned at second inside of imitating inlet plenum; As preferred embodiment, described first imitates the gas inlet chamber of inlet plenum for sealing; The present invention is imitated heat-exchanging tube bundle admission case by first of sealing is set, and TVC is advanced vapour pipe to vaporizer be connected the first effect heat-exchanging tube bundle admission box top, first heating steam of imitating and first can be imitated the evaporated vapor that produces and isolate.
As embodiment preferred, described first imitates the distillation hydroecium between first heat transfer tube and end cap of imitating.
As embodiment preferred, steam-in of described steam-jet ejector and last effect are connected with condenser inlet plenum between the condenser.
The present invention's first single-effect evaporator inlet plenum is arranged on first and imitates and second linkage section of imitating, TVC expansion section exhaust vapour reduces by a length of imitating to vaporizer steam inlet connecting tube (for example 4 imitates 10,000 ton per day vaporizers, can make blow-off line reduce 9.6m), the power loss of minimizing steam; And vaporizer first is imitated and the two effect temperature difference (general 3 ℃) are much smaller with circumstance of temperature difference, helps reducing heat lost by radiation.
Description of drawings
Fig. 1 low-temperature multiple-effect seawater desalination system architecture synoptic diagram; Wherein, 1 imitate spray thrower, 4 for each single-effect evaporator heat-exchanging tube bundle, 3 for each for steam-jet ejector, 2 and imitate inlet plenum, 5 for each and distill hydroecium and 6 for each effect and respectively imitate brine chamber.
Embodiment
Now the present invention will be further elaborated by following specific embodiment, but the present invention is not limited to this.
Fig. 1 is the quadruple effect low temperature multiple-effect distillation seawater desalination system
Steam-jet ejector (TVC) 1, when the power steam pressure of using for low temperature multiple-effect distillation seawater desalination system system water is higher, can adopt the part steam in the air chamber 4 between steam-jet ejector (TVC) 1 injection the 4th single-effect evaporator and the condenser (not having among the figure to show), imitate inlet plenum 4 by first then and enter in the first effect heat transfer tube 2, as system water heating steam vapour source.
The spray thrower 3 of seawater by each effect outside vaporizer heat-exchanging tube bundle 2, absorbs the heat of vaporization of heat transfer tube internal heating steam with the material seawater spraying, and the inlet plenum 4 that the steam of generation enters next effect continues heating, and next imitates seawater.Simultaneously, the off-lying sea water condensation is managed in the heating steam in the heat-exchanging tube bundle 2, and phlegma enters distillation hydroecium 5, and collects by imitating, and obtains fresh water.Each is imitated unevaporated concentrated seawater and enters brine chamber 6, collects the back discharging by imitating.
Low temperature quadruple effect evaporation of seawater of the present invention system with advance steam port and be arranged on the 1st low temperature four-effect evaporator system of imitating the end cap side and compare: 1, reduce TVC to evaporator joint pipe road length, reduce facility investment, for example, imitate the low temperature multiple-effect distillation sea water desalting device for fresh water yield 10,000 ton per days 4, this admission system advances steam port and is arranged on the 1st effect end cap side, can reduce DN2500 blow-off line 9.6m.2, imitate the low temperature multiple-effect distillation sea water desalting device for fresh water yield 10,000 ton per days 4, this admission system advances steam port and is arranged on the 1st effect end cap side, reduces the area of dissipation of end caps, helps reducing heat lost by radiation.
Claims (5)
1. low-temperature multi-effect evaporation of seawater system, described system comprise steam-jet ejector, respectively imitate heat-exchanging tube bundle, respectively imitate spray thrower, respectively imitate air chamber, each is imitated distillation hydroecium and respectively imitates brine chamber, it is characterized in that the vapour outlet of described steam-jet ejector and first imitating the heat-exchanging tube bundle inlet plenum and be connected between first and second is imitated.
2. low-temperature multi-effect evaporation of seawater according to claim 1 system is characterized in that, described first imitates inlet plenum is positioned at second inside of imitating inlet plenum.
3. low-temperature multi-effect evaporation of seawater according to claim 2 system is characterized in that, described first imitates the gas inlet chamber that inlet plenum is sealing.
4. low-temperature multi-effect evaporation of seawater according to claim 3 system is characterized in that, steam-in of described steam-jet ejector is connected with the condenser inlet plenum between last effect and the condenser.
5. low-temperature multi-effect evaporation of seawater according to claim 4 system is characterized in that, described first imitates the distillation hydroecium between first heat transfer tube and end cap of imitating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102462786A CN102092805B (en) | 2009-12-14 | 2009-12-14 | Low temperature multi-effect seawater desalting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102462786A CN102092805B (en) | 2009-12-14 | 2009-12-14 | Low temperature multi-effect seawater desalting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102092805A true CN102092805A (en) | 2011-06-15 |
| CN102092805B CN102092805B (en) | 2012-12-26 |
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| CN2009102462786A Active CN102092805B (en) | 2009-12-14 | 2009-12-14 | Low temperature multi-effect seawater desalting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267733A (en) * | 2011-06-27 | 2011-12-07 | 哈尔滨汽轮机厂辅机工程有限公司 | Industrial waste heat low-temperature multi-effect seawater desalting system |
| CN107963681A (en) * | 2017-10-18 | 2018-04-27 | 楚天华通医药设备有限公司 | A kind of multistage steam recompresses formula distillation machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2934211Y (en) * | 2006-07-13 | 2007-08-15 | 北京朗新明环保科技有限公司 | Water desalination low temperature multi-effect device |
| CN101182051A (en) * | 2007-11-26 | 2008-05-21 | 滨海环保装备（天津）有限公司 | Low-temperature multiple-effect distillation sea water desalting equipment and working method thereof |
| CN201665550U (en) * | 2009-12-14 | 2010-12-08 | 中国神华能源股份有限公司 | Low-temperature multi-effect sea water desalting system |
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2009
- 2009-12-14 CN CN2009102462786A patent/CN102092805B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267733A (en) * | 2011-06-27 | 2011-12-07 | 哈尔滨汽轮机厂辅机工程有限公司 | Industrial waste heat low-temperature multi-effect seawater desalting system |
| CN107963681A (en) * | 2017-10-18 | 2018-04-27 | 楚天华通医药设备有限公司 | A kind of multistage steam recompresses formula distillation machine |
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| Publication number | Publication date |
|---|---|
| CN102092805B (en) | 2012-12-26 |
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