CN101948148B - Energy-saving low-temperature multiple-effect seawater desalting device - Google Patents
Energy-saving low-temperature multiple-effect seawater desalting device Download PDFInfo
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- CN101948148B CN101948148B CN2010105163986A CN201010516398A CN101948148B CN 101948148 B CN101948148 B CN 101948148B CN 2010105163986 A CN2010105163986 A CN 2010105163986A CN 201010516398 A CN201010516398 A CN 201010516398A CN 101948148 B CN101948148 B CN 101948148B
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- 239000013535 sea water Substances 0.000 title claims abstract description 80
- 238000011033 desalting Methods 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000000694 effects Effects 0.000 claims abstract description 20
- 239000002918 waste heat Substances 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims description 19
- 238000010612 desalination reaction Methods 0.000 claims description 13
- 239000006200 vaporizer Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 239000003546 flue gas Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000012267 brine Substances 0.000 abstract description 11
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract description 11
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 abstract 4
- 229920006395 saturated elastomer Polymers 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000004821 distillation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000007701 flash-distillation Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 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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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses an energy-saving low-temperature multiple-effect seawater desalting device, which is used for solving the problems of high operation cost and unstable operation of a desalting device. The energy-saving low-temperature multiple-effect seawater desalting device comprises a steam ejector, evaporators and a condenser, wherein multiple effect evaporators are connected in series; after improvement, the heat source of the device consists of a steel mill off-gas pipeline and a waste heat boiler; the waste heat boiler converts steel mill waste heat off-gas into saturated steam and overheat steam; the saturated steam and overheat steam are introduced into the first effect evaporator through the steam ejector; and the outlet of the last effect evaporator is connected with the condenser. The energy-saving low-temperature multiple-effect seawater desalting device has the advantages that: a, the waste heat boiler is introduced, the steel mill off-gas is fully utilized, the energy is saved, the operating cost of the device is reduced, and the pollution of the steelmaking off-gas on the environment is reduced; and b, the heat of finished water and strong brine is fully utilized, the temperature of the seawater at the inlet and outlet of the condenser is kept stable through intelligent pipeline control despite of the change of the temperature of seawater, and the equipment has the stable and optimized running state.
Description
Technical field
The present invention relates to a kind of sea water desaltination treatment unit, particularly less energy-consumption and stable low-temperature multi-effect seawater desalination device, belong to the water treating equipment technical field.
Background technology
Because the variation of physical environment and the increase of demand, fresh water are deficient day by day.Obtaining fresh water through the sea water desaltination mode is a kind of effective way, and the sea water desaltination of comparative maturity at present mainly comprises low-temperature multiple-effect distillation, flash distillation distillation method and reverse osmosis membrane.The reverse osmosis membrane desalting plant has compact construction, floor space is little, and capacity of equipment scale scope is big, is convenient to characteristics such as installation; But the preprocessing process of raw water is complicated; Strict, in addition,, periodic replacement strict to reverse osmosis membrane; Need heat treated under the low situation of seawater temperature, so just increased running cost.The facility investment of MSF distillation method is big, fouling and seriously corroded, and development in recent years is slow.And low-temperature multiple-effect distillation is because its raw material seawater pre-treatment is simple, the system dynamic power consumption is little, the finished product water water quality advantages of higher of producing, and development in recent years is rapid, is one of technology of the tool development prospect of sea water desaltination.At present; The thermal source of low-temperature multiple-effect seawater desalination technology adopts the low-grade steam of power plant to get into vaporizer more; Let the seawater after heating in a plurality of placed in-line vaporizers, evaporate; The steam that previous evaporator evaporation is come out is as the thermal source of next vaporizer, and condensation goes out to be multiple times than the fresh water (finished product water) of heating steam.The problem that the low-temperature multiple-effect seawater desalination technology exists at present is: steam source is on the high side, evaporator material is expensive, and it is high always to make the water cost; The raw material seawater temperature variation causes operation stability of equipment to be affected.
Summary of the invention
Technical problem to be solved by this invention is: overcome the defective of above-mentioned prior art and provide a kind of and utilize steel melting furnace to discharge flue gas to be thermal source and stable energy-saving low-temperature multi-effect seawater desalination device.
The alleged problem of the present invention is solved by following technical scheme:
A kind of energy-saving low-temperature multi-effect seawater desalination device; Comprise steam injector, vaporizer, vacuum ejector, condenser in the formation; Wherein each single-effect evaporator series connection, its special feature: said device thermal source is made up of steel mill's flue and waste heat boiler, and waste heat boiler converts steel mill's waste heat flue gas to saturation steam, superheated vapour; Saturation steam, superheated vapour are sent into first evaporator through steam injector, and the last evaporator outlet connects condenser.
Above-mentioned energy-saving low-temperature multi-effect seawater desalination device; It also is provided with the raw material seawater heat exchange section; The raw material seawater heat exchange section comprises seawater preheating branch road, finished product water cooling branch road, seawater bypass branch, raw material water pump and each regulated valve, seawater preheating branch road, finished product water cooling branch road, the parallel connection of seawater bypass branch, and the raw material water pump is communicated with the inlet of above-mentioned three parallel branches; The outlet of above-mentioned three parallel branches is communicated with condenser; The seawater preheating branch road is provided with the seawater preheating device, and finished product water cooling branch road is provided with the finished product watercooler, and the seawater bypass branch is provided with the seawater bypass valve.
Above-mentioned energy-saving low-temperature multi-effect seawater desalination device is horizontally disposed with copper aluminium composite heat-exchange pipe in said each vaporizer, each evaporator shell is a stainless steel clad plate.
Above-mentioned energy-saving low-temperature multi-effect seawater desalination device; Said vaporizer is six effects; Each secondary steam that imitate to produce gets into next and imitates as thermal source, and the secondary steam that fourth evaporator produces gets into 1st effective evaporator by steam injector injection to 1st effective evaporator and the steam that produces with waste heat boiler.
The present invention is directed to existing low-temperature multi-effect seawater desalination device running cost problem high, that operation stability is not good enough improves; Compared with prior art have the following advantages: waste heat boiler is introduced in (1); Make full use of the discharging flue gas of steel mill, in save energy, reduction sea water distiling plant running cost, reduce steel-making flue gas pollution on the environment; (2) make full use of the heat of finished product water and strong brine; Through the pipeline intelligent control, constitutive material seawater heat exchange section, no matter how the raw material seawater temperature changes; The seawater temperature of condenser inlet, outlet keeps stable, and the equipment that makes reaches stable optimal operational condition; (3) this usefulness New Evaporator has replaced ordinary stainless steel plate with stainless steel clad plate, and adopts copper aluminum composite pipes, has reduced the cost of equipment.
Description of drawings
Fig. 1 is a structural principle synoptic diagram of the present invention.
Label is represented as follows among the figure: 1. 1st effective evaporator; 2. 2nd effect evaporator; 3. triple-effect evaporator; 4. quadruple effect evaporator; 5. quintuple effect evaporator; 6. sextuple-effect evaporator; 7. vacuum ejector; 8. charging pump; 9. condenser; 10. finished product water pump; 11. finished product watercooler; 12. strong brine pump; 13. seawater bypass valve; 14. strong brine vent valves; 15. seawater preheating device; 16. raw material water pump; 17. condensate cooler; 18. steam injector; 19. waste heat boiler; 20. steel mill's flue; 21. condenser seawater bleed valve; 22. finished product watercooler outlet seawater vent valves; 23. finished product water manifold trunk.
Embodiment
Referring to Fig. 1; The present invention comprises thermal source, steam injector 18,1st effective evaporator 1,2nd effect evaporator 2, triple-effect evaporator 3, quadruple effect evaporator 4, quintuple effect evaporator 5, sextuple-effect evaporator 6, vacuum ejector 7, condenser 9 in constituting, above-mentioned sextuple-effect evaporator series connection.Be save energy, reduction running cost; Thermal source of the present invention comprises steel mill's flue 20 and waste heat boiler 19; Utilize waste heat boiler 19 to convert the discharging flue gas of steel mill to saturation steam, superheated vapour; Saturation steam, superheated vapour are sent in the 1st effective evaporator 1 through steam injector 18, and the outlet of sextuple-effect evaporator 6 connects condenser 9.
Still referring to Fig. 1; The present invention also is provided with the raw material seawater heat exchange section; Said raw material seawater heat exchange section comprises seawater preheating branch road, finished product water cooling branch road, seawater bypass branch, raw material water pump 16 and each regulated valve; Seawater preheating branch road, finished product water cooling branch road, the parallel connection of seawater bypass branch, raw material water pump 16 is communicated with the inlet of above-mentioned three parallel branches, and the outlet of above-mentioned three parallel branches is communicated with condenser 9.On the seawater preheating branch road, be provided with seawater preheating device 15, hot strong brine is introduced the seawater preheating devices through strong brine pump 12, and is discharged by seawater preheating device 15 after the raw material seawater heat exchange; On finished product water cooling branch road, be provided with finished product watercooler 11, hot finished product water is introduced finished product watercoolers 11 through finished product water pump 10, and is discharged by finished product watercooler 11 after the raw material seawater heat exchange again; The seawater bypass branch is provided with seawater bypass valve 13.Raw material seawater gets into condenser 9 heat exchange once more behind the heat that has absorbed finished product water and strong brine, be transported to one～sextuple-effect evaporator by charging pump 8 then.Seawater bypass valve 13, strong brine vent valves 14, condenser seawater bleed valve 21, finished product watercooler outlet seawater vent valves 22 are by automatic intelligent system regulating and controlling; Make no matter how the natural sea-water temperature changes; The seawater temperature of condenser 9 inlet, outlet keeps stable, makes of the present invention exert oneself and water generation ratio keeps basicly stable.
Be horizontally disposed with copper aluminium composite heat-exchange pipe in each vaporizer of the present invention, each evaporator shell is a stainless steel clad plate, and the above-mentioned reduction cost of goods manifactured that is arranged on has improved heat exchange efficiency simultaneously.
Still referring to Fig. 1; Working process of the present invention is following: when vaporizer is set up seawater---and after the salt water cycle, utilize vacuum ejector 7 to set up the vacuum of vaporizer, after terminal condenser 9 vacuum reach ratings; In the inlet end of 1st effective evaporator 1, feed steam through steam injector 18; With the heating of the material seawater of 1st effective evaporator and flash to steam, the secondary steam that 1st effective evaporator produces gets into 2nd effect evaporator 2, is condensed into finished product water by the seawater of second single-effect evaporator; By that analogy to quadruple effect evaporator 4.The steam that the secondary steam that quadruple effect evaporator produces is produced with waste heat boiler 19 by the compression of steam injector 18 injections gets into the inlet end of 1st effective evaporator; Rest part gets into quintuple effect evaporator 5; Be condensed into finished product water at quintuple effect evaporator 5; Simultaneously with the heating of the material seawater of quintuple effect evaporator and flash to steam and get into finished product water, simultaneously with the material seawater heating of quintuple effect evaporator and flash to steam and get into sextuple-effect evaporator; After getting into condenser 9 condensations, the secondary steam that sextuple-effect evaporator 6 produces obtains finished product water; Begin from 2nd effect evaporator, the finished product water of each single-effect evaporator generation is imitated the strong brine that does not have evaporation and is flow to next its heat of effect flash distillation recovery step by step with each, increases the water generation ratio of system.At last, strong brine is transported to 15 heat exchange of seawater preheating device or is discharged near saltern by strong brine pump 12 from sextuple-effect evaporator; Finished product water is delivered to the finished product water tank after sextuple-effect evaporator is delivered to 11 heat exchange of finished product watercooler by finished product water pump 10, as production, life and tap water.
Claims (3)
1. energy-saving low-temperature multi-effect seawater desalination device; It comprises steam injector (18), vaporizer, vacuum ejector (7) and condenser (9); Wherein each single-effect evaporator series connection, it is characterized in that: said device thermal source is made up of steel mill's flue (20) and waste heat boiler (19), and waste heat boiler converts steel mill's waste heat flue gas to saturation steam, superheated vapour; Saturation steam, superheated vapour are sent into first evaporator through steam injector, and the last evaporator outlet connects condenser;
It also is provided with the raw material seawater heat exchange section; The raw material seawater heat exchange section comprises seawater preheating branch road, finished product water cooling branch road, seawater bypass branch, raw material water pump (16) and each regulated valve; Seawater preheating branch road, finished product water cooling branch road, the parallel connection of seawater bypass branch; The raw material water pump is communicated with the inlet of above-mentioned three parallel branches, and the outlet of above-mentioned three parallel branches is communicated with condenser (9), and the seawater preheating branch road is provided with seawater preheating device (15); Finished product water cooling branch road is provided with finished product watercooler (11), and the seawater bypass branch is provided with seawater bypass valve (13).
2. energy-saving low-temperature multi-effect seawater desalination device according to claim 1 is characterized in that: be horizontally disposed with copper aluminium composite heat-exchange pipe in each vaporizer, each evaporator shell is a stainless steel clad plate.
3. energy-saving low-temperature multi-effect seawater desalination device according to claim 1 and 2; It is characterized in that: said vaporizer is six effects; Each secondary steam that imitate to produce gets into next and imitates as thermal source, and the secondary steam that fourth evaporator (4) produces gets into 1st effective evaporator by steam injector (18) injection to 1st effective evaporator (1) and the steam that produces with waste heat boiler (19).
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| CN2010105163986A CN101948148B (en) | 2010-10-22 | 2010-10-22 | Energy-saving low-temperature multiple-effect seawater desalting device |
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| CN2010105163986A CN101948148B (en) | 2010-10-22 | 2010-10-22 | Energy-saving low-temperature multiple-effect seawater desalting device |
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| CN101948148A CN101948148A (en) | 2011-01-19 |
| CN101948148B true CN101948148B (en) | 2012-06-27 |
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| CN102718276B (en) * | 2012-07-12 | 2014-01-08 | 众和海水淡化工程有限公司 | Efficient low-temperature multi-effect evaporation sea water desalting plant |
| CN102774917B (en) * | 2012-08-14 | 2013-07-03 | 众和海水淡化工程有限公司 | Petrifaction waste heat utilization based low-temperature multiple-effect sea water distillation desalinization system |
| CN103663589B (en) * | 2013-12-16 | 2015-02-04 | 湖南创化低碳环保科技有限公司 | Seawater desalinization method and seawater desalinization device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100596291C (en) * | 2006-12-27 | 2010-03-31 | 韩建民 | Seawater desalination system with cogeneration of electricity, salt and water |
| DE102008004106A1 (en) * | 2008-01-11 | 2009-09-10 | Babcock Borsig Service Gmbh | Saltwater desalination process and plant using MSF desalinization units with an improved linoleum run system |
| CN101264947B (en) * | 2008-04-30 | 2011-05-11 | 华北电力大学 | Segment water-water preheating multiple-effect distillation sea water desalination technical process |
| 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 |
| CN201901602U (en) * | 2010-10-22 | 2011-07-20 | 河北宏润重工集团有限公司 | Energy-saving, low-temperature and multiple-effect sea water desalinating device |
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Address after: 061300 Yanshan Industrial Development Zone, Cangzhou, Hebei Patentee after: HEBEI HONGRUN NUCLEAR EQUIPMENT SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: 061300 Yanshan Industrial Development Zone, Cangzhou, Hebei Patentee before: HEBEI HONGRUN HEAVY INDUSTRY GROUP CO.,LTD. |
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Effective date of registration: 20231012 Granted publication date: 20120627 |