CN1303003C - Pretreating method for reversing asmose seawater desalinating pulsing electromagnetic field - Google Patents
Pretreating method for reversing asmose seawater desalinating pulsing electromagnetic field Download PDFInfo
- Publication number
- CN1303003C CN1303003C CNB2004100507582A CN200410050758A CN1303003C CN 1303003 C CN1303003 C CN 1303003C CN B2004100507582 A CNB2004100507582 A CN B2004100507582A CN 200410050758 A CN200410050758 A CN 200410050758A CN 1303003 C CN1303003 C CN 1303003C
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- CN
- China
- Prior art keywords
- electromagnetic field
- pulse electromagnetic
- pretreating method
- pretreating
- seawater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005672 electromagnetic field Effects 0.000 title claims abstract description 34
- 239000013535 sea water Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title abstract description 33
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 22
- 238000010612 desalination reaction Methods 0.000 claims abstract description 3
- 238000002203 pretreatment Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000012528 membrane Substances 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 7
- 230000001112 coagulating effect Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 230000010287 polarization Effects 0.000 abstract description 2
- 239000002455 scale inhibitor Substances 0.000 abstract description 2
- 238000004062 sedimentation Methods 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 abstract description 2
- 229940079593 drug Drugs 0.000 abstract 1
- 239000003814 drug Substances 0.000 abstract 1
- 239000008394 flocculating agent Substances 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 230000000737 periodic effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000001728 nano-filtration Methods 0.000 description 4
- 238000011033 desalting Methods 0.000 description 3
- 238000001471 micro-filtration Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000009738 saturating Methods 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- Y02A20/131—Reverse-osmosis
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to a pretreating method for reverse osmosis seawater-desalinating pulse electromagnetic fields, which solves the problems of long technological process, high concentration of suspended substance, generation of a concentration polarization phenomenon, and pollution, periodic membrane replacement or membrane integration and high cost caused by a membrane technique existing in the existing pretreating method. The pretreating method has the technical scheme that seawater respectively enters a primary pulse electromagnetic field treater and a secondary pulse electromagnetic field treater, is treated by a primary pulse electromagnetic field and a secondary pulse electromagnetic field after passing through a settling tank, and then enters a reverse osmosis unit, the treating pulse voltage of the primary pulse electromagnetic field and the secondary pulse electromagnetic field is from 1 to 1000V, and the pulse frequency is from 0.1 to 500Hz. The pretreating method has the advantages that the pretreating method has no need of adding chemical medicines containing flocculating agents, scale inhibitors, etc., shortens a pretreating process, enhances the quality of effluent water and prolongs the service life of a reverse osmosis membrane; the pretreating method further removes colloidal particles difficult to remove by coagulating sedimentation so as to enhance the quality of the effluent water; the pretreating method prolongs the service life of a pretreating membrane so as to reduce the cost of seawater desalination; the pretreating method has low energy consumption and no waste water, waste gas or noise.
Description
Technical field
The invention belongs to a kind of sea water desaltination pretreatment process, particularly a kind of reverse osmosis seawater desalting pulse electromagnetic field pretreatment process.
Background technology
Traditional sea water desaltination pre-treatment mainly contains three kinds of methods.A kind of is the pre-treatment of small-sized sea water desalinating plant: pre-treatment remove mainly to as if suspended substance, colloid, therefore can adopt better simply pretreatment process, i.e. seawater, deep bed filter or sand filter, security personnel's strainer, reverse osmosis units.Wherein deep bed filter can be made of materials such as non-woven fabrics, in order to remove the bigger suspended substance of particle diameter, takes out behind the use certain hour, gets final product through artificial the cleaning.Another kind is the pre-treatment of portable sea water desalinating plant.Because seawater vulnerable to pollution by seashore, existing suspended substance in the water, colloid and dissolved substance, also may contain large amount of organic, microorganism, bacterium, pollution substances such as algae, and different areas, the water quality difference of Various Seasonal is big, for satisfying the requirement of SWRO (seawater reverse osmosis is saturating) influent quality, must strengthen pre-treatment, adopt complicated technical process, seawater adds coagulating agent after reactor, settling vessel, one-level security personnel strainer, the secondary safety cut-out, sterilizer, reverse osmosis units, though this technological operation is simple, but the filter core that technical process is used is more, perhaps through reactor, settling vessel, more medium filter, security personnel's strainer, sterilizer, reverse osmosis units.This technical process adaptability is stronger, but the more medium filter quality also needs back flushing, be provided with complicated.The third is the pre-treatment of desalimtor, because used source water is inshore seawater, so the source water quality that water quality and wheeled apparatus are handled is similar, seawater is through open caisson, more medium filter, activated charcoal filter, security personnel's strainer and reverse osmosis units, it has adopted the natural filteration of bank layer of sand, activated charcoal filter is set in order to adsorb and to remove organism and foreign odor, peculiar smell, but gac needs regeneration after using for some time, be applicable to that the seawater organic content has foreign odor after too high, the area of peculiar smell, perhaps seawater is through settling pit, more medium filter, the fine sand filter, security personnel's strainer, reverse osmosis units, this method only is applicable to the area that turbidity of sea water is lower.The shortcoming of above-mentioned traditional sea water desaltination pretreatment process is that technical process is long, and to colloidal type particulate matter poor removal effect in the seawater, is eliminated just gradually.
Occur continuous microfiltration technology, ultramicrotechnique and nanofiltration in recent years and carried out the pretreated method of sea water desaltination, wherein continuous microfiltration technology adopts the hollow-fibre membrane of 0.2 micron pore size, material is polypropylene, sulfonated polyether sulfone or cellulose acetate, dead-end filtration from inside to outside.Ultra-filtration technique can constitute the UF/RO integrated technology with UF (ultrafiltration) as the pre-treatment of RO (reverse osmosis), and novel capillary type UF film can be handled highly polluted surface seawater.Nanofiltration adopts NF (nanofiltration) film to remove hardness and total dissolved solidss, thereby improves the saturating working pressure of seawater reverse osmosis and the rate of recovery of system, guarantees the safe and stable operation of film spare.The shortcoming of above-mentioned micro-filtration, ultrafiltration and nanofiltration is to wash hollow fiber conduit by the stoppage in transit of short period of time, and keeping stable product water flux, and these films or integrated film also will regularly replace, and cost is higher.
Summary of the invention
The objective of the invention is to solve that the technical process that the pre existing treatment process exists is long, concentration of suspension is too high and produce concentration polarization phenomenon and self-pollution, needs that membrane technique brought and regularly replace film or integrated film, cost problem of higher in the seawater, and a kind of reverse osmosis seawater desalting pulse electromagnetic field pretreatment process is provided.
Technical solution of the present invention is: seawater is through behind the settling pit, enter one-level pulse electromagnetic field processor and carry out the processing of one-level pulse electromagnetic field, water outlet enters secondary pulse electromagnetic field treater again and carries out the processing of secondary pulse electromagnetic field, enter reverse osmosis units then, the pulsed voltage that said one-level pulse electromagnetic field is handled and the secondary pulse electromagnetic field is handled is 1～1000V, and pulse-repetition is 0.1～500Hz.
Advantage of the present invention is:
1, in the saturating preprocessing process of seawater reverse osmosis, adopts the pulse electromagnetic field treatment technology, do not need to add pharmaceutical chemicalss such as flocculation agent, Scale inhibitors, shortened pretreatment process, improved effluent quality, prolonged the work-ing life of reverse osmosis membrane.
2, can utilize the pulse electromagnetic field technology that existing conventional pretreatment technology is improved, the pulse electromagnetic field processor is arranged on after the coagulative precipitation tank, further remove coagulating sedimentation and be difficult to the colloidal solid removed, improve effluent quality.
3, in the film pretreatment technology, the pulse electromagnetic field processor can be set before film, improve the work-ing life of pre-treatment film, thereby reduce Cost of seawater desalination.
4, treatment scheme is short, energy consumption is low, no waste water, no waste gas, noiseless, and the output of comparing waste residue with traditional method also significantly reduces.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
As shown in the figure, seawater is through behind the settling pit, enter one-level pulse electromagnetic field processor and carry out the processing of one-level pulse electromagnetic field, water outlet enters secondary pulse electromagnetic field treater again and carries out the processing of secondary pulse electromagnetic field, enter reverse osmosis units then, the pulsed voltage that said one-level pulse electromagnetic field is handled and the secondary pulse electromagnetic field is handled is 1～1000V, and pulse-repetition is 0.1～500Hz.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100507582A CN1303003C (en) | 2004-10-28 | 2004-10-28 | Pretreating method for reversing asmose seawater desalinating pulsing electromagnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100507582A CN1303003C (en) | 2004-10-28 | 2004-10-28 | Pretreating method for reversing asmose seawater desalinating pulsing electromagnetic field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1613786A CN1613786A (en) | 2005-05-11 |
| CN1303003C true CN1303003C (en) | 2007-03-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100507582A Expired - Fee Related CN1303003C (en) | 2004-10-28 | 2004-10-28 | Pretreating method for reversing asmose seawater desalinating pulsing electromagnetic field |
Country Status (1)
| Country | Link |
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| CN (1) | CN1303003C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101028960B (en) * | 2006-12-07 | 2010-09-29 | 中国市政工程华北设计研究院 | Method for pre-treating seawater by flow-raising aeration biological filtering pool |
| CN102351334A (en) * | 2011-07-01 | 2012-02-15 | 叶永祥 | Reverse osmosis membrane pulse sewage discharge method |
| CN202297263U (en) * | 2011-08-04 | 2012-07-04 | 格林安株式会社 | Drinking water production device |
| CN103880120B (en) * | 2014-03-28 | 2015-12-02 | 张英华 | Low, high purity rotatingfield and water pump type reverse osmosis desalination device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS621495A (en) * | 1985-06-24 | 1987-01-07 | Hitachi Metals Ltd | Apparatus for removing carbonic acid in water |
| JPH11128918A (en) * | 1997-11-05 | 1999-05-18 | Japan Steel Works Ltd:The | Water treatment equipment |
| CN1243454A (en) * | 1997-01-09 | 2000-02-02 | 葛菲德国际股资公司 | Water treatment |
| CN2401538Y (en) * | 1999-10-22 | 2000-10-18 | 李军 | Magnetic ion sieve sea water desalination device |
| CN1299338A (en) * | 1998-03-31 | 2001-06-13 | 丹尼斯－米歇尔·莱多克斯 | Molecular polarization method and apparatus in water |
| JP2002066565A (en) * | 2000-09-01 | 2002-03-05 | Nichirei Corp | Method and apparatus for producing concentrated liquid |
-
2004
- 2004-10-28 CN CNB2004100507582A patent/CN1303003C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS621495A (en) * | 1985-06-24 | 1987-01-07 | Hitachi Metals Ltd | Apparatus for removing carbonic acid in water |
| CN1243454A (en) * | 1997-01-09 | 2000-02-02 | 葛菲德国际股资公司 | Water treatment |
| JPH11128918A (en) * | 1997-11-05 | 1999-05-18 | Japan Steel Works Ltd:The | Water treatment equipment |
| CN1299338A (en) * | 1998-03-31 | 2001-06-13 | 丹尼斯－米歇尔·莱多克斯 | Molecular polarization method and apparatus in water |
| CN2401538Y (en) * | 1999-10-22 | 2000-10-18 | 李军 | Magnetic ion sieve sea water desalination device |
| JP2002066565A (en) * | 2000-09-01 | 2002-03-05 | Nichirei Corp | Method and apparatus for producing concentrated liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1613786A (en) | 2005-05-11 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LIAONING TECHNICAL UNIVERSITY Free format text: FORMER OWNER: WANG JIANZHONG; DU HUILING; ZHOU DAQI Effective date: 20080215 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080215 Address after: No 169, 121001 Ying Street, Guta District, Jinzhou Patentee after: Liaoning University of Technology Address before: Liaoning University of Technology, 169 Jinzhou street, Guta District, Liaoning, China: 121001 Co-patentee before: Du Huiling Patentee before: Wang Jianzhong Co-patentee before: Zhou Daqi |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070307 Termination date: 20101028 |