CN101475231A - Novel low temperature multiple-effect distillation seawater desalination system and working method - Google Patents
Novel low temperature multiple-effect distillation seawater desalination system and working method Download PDFInfo
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- CN101475231A CN101475231A CNA2008101543777A CN200810154377A CN101475231A CN 101475231 A CN101475231 A CN 101475231A CN A2008101543777 A CNA2008101543777 A CN A2008101543777A CN 200810154377 A CN200810154377 A CN 200810154377A CN 101475231 A CN101475231 A CN 101475231A
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- 239000013535 sea water Substances 0.000 title claims abstract description 60
- 238000004821 distillation Methods 0.000 title claims abstract description 27
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000012267 brine Substances 0.000 claims abstract description 14
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 14
- 239000013505 freshwater Substances 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 12
- 238000001704 evaporation Methods 0.000 claims abstract description 6
- 230000008020 evaporation Effects 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims abstract 2
- 239000006200 vaporizer Substances 0.000 claims description 26
- 238000009833 condensation Methods 0.000 claims description 7
- 230000005494 condensation Effects 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000011033 desalting Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 claims description 3
- 230000007812 deficiency Effects 0.000 claims description 2
- 239000003643 water by type Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012266 salt solution Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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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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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention provides a novel low-temperature multi-effect seawater distilling-desalinating system, which comprises a seawater preheating part, a dual-drum parallel multi-effect evaporation part, a condensing part and the like in the prior art, and also comprises an equilibrium distribution part for vapor, product water and strong brine among multi-effect parallel evaporators. A working method of the system comprises the following steps that: (1) a thermal vapor compressor (TVC) ejects vapor which is uniformly discharged to a multi-effect evaporator with a TVC part in a front segment; (2) non-ejected vapor is discharged into a TVC-free multi-effect evaporator in a back segment; (3) a vapor pipeline between the evaporators in parallel arrangement is used for balancing the pressure of two parts; (4) the parallel evaporators share a seawater preheater; (5) one part of preheated seawater enters the parallel evaporators through a pipeline, and the other part of the preheated seawater enters the preheater in the front and continues to be heated; (6) the bottoms of the parallel evaporators are provided with a concentrated water pipeline and a fresh water pipeline for communication; and (7) a fresh water pipe and a brine pipe are arranged between two adjacent effects on the bottom of the TVC-free multi-effect evaporator in the back segment. The system has the advantage of realizing the modular large-scale design for low-temperature multi-effect seawater distillation and desalination.
Description
Technical field
The present invention relates to the multiple-effect distillation sea water desalting field, be particularly useful for large-scale low temperature multiple-effect distillation device.
Background technology
Sea water desaltination claims sea water desalinization again, is the technology and the process of separating salt and water in the seawater.The main stream approach of sea water desaltination at present comprises Re Fa and embrane method.Hot method sea water desaltination mainly contains multistage flash evaporation and two kinds of methods of low temperature multiple-effect distillation.Low temperature multiple-effect distillation is because temperature is low, and corrosion and fouling tendency are low, and the ton water consumption is low, is the development trend of hot method.
The development trend of low temperature multiple-effect distillation sea water desalting is to maximize, and the maximum water production rate of separate unit is 2.5 ten thousand ton per days at present.The maximization of device can make operation more economical, but is limited by the restriction of device volume, especially is subjected to the restriction of evaporator tube diameter.Along with diameter becomes big, transportation, intensity, installation all are problem demanding prompt solutions.
Summary of the invention
The present invention is a kind of novel low temperature multiple-effect distillation seawater desalination system and method for work, and it can overcome the deficiency that prior art exists, effective save energy, and cost is lower.
Technical scheme of the present invention: a kind of novel low temperature multiple-effect distillation seawater desalination system, it is characterized in that it comprises former seawater preheating device, bitubular multiple-effect evaporator in parallel, condenser etc. also comprise the equilibrium distribution of respectively imitating steam between vaporizer arranged side by side, product water and strong brine etc.
Above-mentioned low temperature multiple-effect distillation seawater desalination system adopts the mode of two or more evaporator tube parallel connections, when implement device maximizes, has evaded the difficulty of transportation, installation.
Above-mentioned low temperature multiple-effect distillation seawater desalination system has reduced the diameter of evaporator tube, and the thickness of evaporator shell is effectively controlled, and helps reducing manufacturing cost.
Above-mentioned low temperature multiple-effect distillation seawater desalination system, the shared seawater preheating device of vaporizer in parallel has reduced system warm-up device quantity, helps increasing the reliability of system, reduces and makes and installation cost.
Above-mentioned low temperature multiple-effect distillation seawater desalination system, steam, strong brine, product water all have connecting pipe to link to each other between parallel effect, make that operating parameter is consistent between the cylindrical shell in parallel.
A kind of method of work of novel low temperature multiple-effect distillation seawater desalination system, it is characterized in that it may further comprise the steps: 1. vapor compressor be TVC with jetting steam caused pressurize and temperature after, be discharged into the multiple-effect evaporator that leading portion has TVC part uniformly by steam-pipe; 2. do not entered the multiple-effect evaporator that back segment does not have the TVC part by the steam-pipe between two portions vaporizer, as the thermal source of multiple-effect evaporator by the water vapour of injection; 3. the steam-pipe between the vaporizer of arranging in parallel is used for the two-part pressure of balance, keeps two portions steam parameter identical, and the seawater preheating device is introduced the thermal source of steam as the seawater waste heat from steam-pipe; 4. the shared seawater preheating device of vaporizer in parallel, the water of condensation that vapor condensation produces imports the product waterpipe as product water; 5. the seawater part after the preheating enters vaporizer arranged side by side by pipeline, and the preheater that another part enters the front continues heating; 6. the strong brine of Bing Lian base of evaporator and product water have dense waterpipe and fresh water pipeline as connection, make water level unanimity in the vaporizer arranged side by side.7. back segment does not have between adjacent two effects in TVC multiple-effect evaporator bottom partly fresh water pipe and brine tube are arranged, and product water is under the effect of spissated strong brine pressure reduction between imitating behind fresh water and the evaporation of seawater, and is mobile to aftereffect from the preceding effect of multiple-effect evaporator.
Superiority of the present invention is: 1, the maximization of low-cost implement device; 2, less energy-consumption:, make ton water power consumption descend by improving the water yield of making of unitary device; 3, reduce the diameter of evaporator shell, be convenient to make, transport, install; 4, shared preheater reduces manufacturing cost; 5, part realizes the modularization of unit, is convenient to manufacture and design.
Description of drawings
Accompanying drawing is an a kind of novel low temperature multiple-effect distillation seawater desalination system vertical view involved in the present invention.In the accompanying drawing, 1 for there being the multiple-effect evaporator of TVC part; 2 for there not being the multiple-effect evaporator of TVC part; 3 is the steam-pipe between two portions vaporizer; 4 is the seawater preheating device; 5 is the seawater pipeline of seawater preheating device; 6 is TVC; 7 is the steam-pipe of TVC; 8 is the steam-pipe of seawater preheating device; 9 is the salt solution equalizing main between vaporizer arranged side by side; 10 is the fresh water equalizing main between vaporizer arranged side by side; 11 is the injection point of TVC, the i.e. intersection point of the steam-pipe between the steam-pipe of TVC and two portions vaporizer.
Embodiment
Embodiment: a kind of novel low temperature multiple-effect distillation seawater desalination system (see figure 1), it is characterized in that it comprises so that the multiple-effect evaporator 1 of TVC part to be arranged, the multiple-effect evaporator 2 that does not have the TVC part, the steam-pipe 3 that multiple-effect evaporator 1 and multiple-effect evaporator are 2, vapor compressor is TVC6, the steam-pipe 7 of TVC etc.Each single-effect evaporator of wherein said multiple-effect evaporator 1 is in parallel, and the evaporator series of multiple-effect evaporator 2 is in a housing.
Described seawater preheating device 4 is made up of the seawater pipeline 5 of seawater preheating device and the steam-pipe 8 of seawater preheating device.
Salt solution equalizing main 9 between the steam-pipe 8 of described seawater preheating device, vaporizer arranged side by side, the fresh water equalizing main 10 between vaporizer arranged side by side connect each single-effect evaporator of multiple-effect evaporator 1 parallel connection respectively.
A kind of method of work (see figure 1) of novel low temperature multiple-effect distillation seawater desalination system is characterized in that it may further comprise the steps:
1. vapor compressor be TVC6 with jetting steam caused pressurize and temperature after, be discharged into the multiple-effect evaporator 1 that leading portion has TVC part uniformly by steam-pipe 7;
2. do not entered the multiple-effect evaporator 2 that back segment does not have the TVC part by the steam-pipe between two portions vaporizer 3, as the thermal source of multiple-effect evaporator 2 by the water vapour of injection;
3. the steam-pipe 8 between the vaporizer 1 of arranging in parallel is used for the two-part pressure of balance, keeps two portions steam parameter identical, and seawater preheating device 4 is introduced the thermal source of steam as the seawater waste heat from steam-pipe 8;
4. vaporizer 1 shared seawater preheating device 4 in parallel, the water of condensation that vapor condensation produces imports the product waterpipe as product water;
5. the seawater part after the preheating enters vaporizer arranged side by side 1 by pipeline, and the preheater that another part enters the front continues heating;
6. the strong brine of Bing Lian vaporizer 1 bottom and product water have dense waterpipe 9 and fresh water pipeline 10 as being communicated with, and make water level unanimity in the vaporizer arranged side by side 1.
7. back segment does not have between adjacent two effects in TVC multiple-effect evaporator 2 bottoms partly fresh water pipe and brine tube are arranged, and product water is under the effect of spissated strong brine pressure reduction between imitating behind fresh water and the evaporation of seawater, and is mobile to aftereffect from the preceding effect of multiple-effect evaporator 2.
Claims (6)
1, a kind of novel low temperature multiple-effect distillation seawater desalination system mainly comprises former seawater preheating, bitubular multiple-effect evaporation in parallel, and condensations etc. also comprise the equilibrium distribution of respectively imitating steam between vaporizer arranged side by side, product water and dense water etc.
2, according to the said a kind of novel low temperature multiple-effect distillation seawater desalination system of claim 1, it is characterized in that realizing the modular design of sea water desalting equipment, solved excessive, the problems such as weight is excessive, transportation is inconvenient, installation inconvenience of diameter of large-scale low-temperature multi-effect distillation seawater desalination equipment.
3, according to the said a kind of novel low temperature multiple-effect distillation seawater desalination system of claim 1, it is characterized in that described vapor compressor is the TVC system, be boundary with the injection point of TVC, equipment is divided into the rear and front end.Leading portion adopts two or more cylindrical shell parallel connections, and back segment adopts a cylindrical shell.This design can reduce the evaporator tube diameter, is convenient to transportation and the stability deficiency that can avoid cylindrical shell to cause too greatly is installed.
4, according to the said a kind of novel low temperature multiple-effect distillation seawater desalination system of claim 1, it is characterized in that described low temperature multiple-effect distillation equipment adopts between the effect of parallel connection is communicated with steam, strong brine and product water communicating pipe respectively, makes two inner barrel parameters in full accord.
5, according to the said a kind of novel low temperature multiple-effect distillation seawater desalination system of claim 1, the preheater that it is characterized in that the part in parallel of described low temperature multiple-effect distillation technology adopts special steam supply way, promptly by two vaporizers pre-hot sea waters of steam supply simultaneously, preheater is the part on the vapor communication pipe of vaporizer.
6, a kind of method of work of novel low temperature multiple-effect distillation seawater desalination system is characterized in that it may further comprise the steps:
1. vapor compressor be TVC with jetting steam caused pressurize and temperature after, be discharged into the multiple-effect evaporator that leading portion has TVC part uniformly by steam-pipe;
2. do not entered the multiple-effect evaporator that back segment does not have the TVC part by the steam-pipe between two portions vaporizer, as the thermal source of multiple-effect evaporator by the water vapour of injection;
3. the steam-pipe between the vaporizer of arranging in parallel is used for the two-part pressure of balance, keeps two portions steam parameter identical, and the seawater preheating device is introduced the thermal source of steam as the seawater waste heat from steam-pipe;
4. the shared seawater preheating device of vaporizer in parallel, the water of condensation that vapor condensation produces imports the product waterpipe as product water;
5. the seawater part after the preheating enters vaporizer arranged side by side by pipeline, and the preheater that another part enters the front continues heating;
6. the strong brine of Bing Lian base of evaporator and product water have dense waterpipe and fresh water pipeline as connection, make water level unanimity in the vaporizer arranged side by side.
7. back segment does not have between adjacent two effects in TVC multiple-effect evaporator bottom partly fresh water pipe and brine tube are arranged, and product water is under the effect of spissated strong brine pressure reduction between imitating behind fresh water and the evaporation of seawater, and is mobile to aftereffect from the preceding effect of multiple-effect evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101543777A CN101475231A (en) | 2008-12-24 | 2008-12-24 | Novel low temperature multiple-effect distillation seawater desalination system and working method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101543777A CN101475231A (en) | 2008-12-24 | 2008-12-24 | Novel low temperature multiple-effect distillation seawater desalination system and working method |
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| CN101475231A true CN101475231A (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101543777A Pending CN101475231A (en) | 2008-12-24 | 2008-12-24 | Novel low temperature multiple-effect distillation seawater desalination system and working method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985368A (en) * | 2010-11-02 | 2011-03-16 | 大连海水淡化工程研究中心有限公司 | Condenser type seawater desalting device with steam turbine generator unit |
| CN103641192A (en) * | 2013-12-24 | 2014-03-19 | 上海电气电站设备有限公司 | Multi-tube-bundle arrangement structure of low-temperature multi-effect sea water desalination evaporator |
| US9309129B1 (en) | 2015-03-24 | 2016-04-12 | King Saud University | Multi-effects desalination system |
-
2008
- 2008-12-24 CN CNA2008101543777A patent/CN101475231A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985368A (en) * | 2010-11-02 | 2011-03-16 | 大连海水淡化工程研究中心有限公司 | Condenser type seawater desalting device with steam turbine generator unit |
| CN103641192A (en) * | 2013-12-24 | 2014-03-19 | 上海电气电站设备有限公司 | Multi-tube-bundle arrangement structure of low-temperature multi-effect sea water desalination evaporator |
| CN103641192B (en) * | 2013-12-24 | 2015-12-30 | 上海电站辅机厂有限公司 | Low-temperature multiple-effect seawater desalination evaporator multitubular bundles arrangement |
| US9309129B1 (en) | 2015-03-24 | 2016-04-12 | King Saud University | Multi-effects desalination system |
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Open date: 20090708 |