CN101671065A - Positive penetration sea water desalinization strong brine processing technology and processing system - Google Patents
Positive penetration sea water desalinization strong brine processing technology and processing system Download PDFInfo
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- CN101671065A CN101671065A CN200910070804A CN200910070804A CN101671065A CN 101671065 A CN101671065 A CN 101671065A CN 200910070804 A CN200910070804 A CN 200910070804A CN 200910070804 A CN200910070804 A CN 200910070804A CN 101671065 A CN101671065 A CN 101671065A
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- CN
- China
- Prior art keywords
- strong brine
- sea water
- osmosis membrane
- membrane assembly
- forward osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/445—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by forward osmosis
-
- 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
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a positive penetration sea water desalinization strong brine processing technology which comprises the following steps: adopting a positive penetration membrane component, using strong brine obtained by desalting sea water as drawing liquid, using freshwater as charging liquid, discharging the strong brine from the positive penetration membrane component after the strong brine obtained by desalting sea water mixes part of freshwater permeated from a charging side at a permeation side of the positive penetration membrane component and turns into diluted standard-reachingbrine; and discharging residue of the charging liquid from the positive penetration membrane component. The invention also discloses a positive penetration sea water desalinization strong brine processing system which comprises a charging fluid water pump, a positive penetration membrane module, a drawing liquid water pump connected with a transmission side of the positive penetration membrane module, wherein a charging fluid side of the positive penetration membrane module is connected with the charging fluid water pump and provided with a residual charging fluid discharging port, and the transmission side of the positive penetration membrane module is provided with a diluted standard-reaching brine discharging port. The invention can dilute strong brine obtained by desalting sea water to the level of the original sea water, thus avoiding the rising of local sea area salinity when sea water is discharged and protecting marine environment.
Description
Technical field
The present invention relates to a kind of positive osmosis process and adopt the treatment system of this technology, particularly a kind of positive penetration sea water desalinization strong brine processing technology and treatment system.
Background technology
The salinity of the strong brine of desalimtor discharging generally is to take about 2 times of seawater.If these strong brine discharging modes are improper, will cause discharging the rising of marine site salinity.Discover halobiontic breathing of many classes and discharge capacity, all the salinity with its context has confidential relation.The rising of salinity can change the balance of osmotic pressure in the body fluid of marine organisms own and its living environment seawater, thereby reduces halobiontic reproductivity (mainly being larva and young baby), even makes its extinction.Some marine organisms is comparatively responsive to salinity, only can keep the balance of osmotic pressure between its body fluid and surrounding environment in a narrow salinity variation range.Though some marine organisms still can survive when salinity increases to a certain degree, the multiplication capacity of its cell greatly lowers.In addition, because bottom-dwelling does not have enough abilities of dwelling of moving, so the strong brine discharging is especially serious near the benthic influence the water port.
For avoiding or alleviating of the influence of the strong brine of desalimtor's discharging, should take suitable emission measure usually to ocean environment.For the desalimtor that water power coproduction mode is built, the strong brine of sea water desaltination is sneaked into the cooling-water drain system of power plant usually, thus the salinity of reduced exhaust mouth.Utilizing sea water desalinization strong brine to carry out salt manufacturing is the Perfected process of avoiding the sea water desalinization strong brine environmental problem, and strong brine is made full use of by the saltern, fully the row of avoiding sea.But this kind disposal options needs neighbour saltern, desalination plant, and range of application is restricted.
Independently build the desalimtor of discharge outlet for needs, build discharge tube and corresponding establishment usually, make seawater disperse to enter marine, avoid local marine site salinity too to raise.Though taked certain emission measure, the rising of discharging marine site salinity is unavoidable, the influence of ocean environment is failed to avoid, and equipment input cost height.
Just permeating is a kind of and reverse osmosis similar techniques, just permeating be meant water by selectively permeable membrane from high water chemistry gesture zone the transmittance process to low water chemistry gesture zone.In the reverse osmosis operation, feed water is applied in the pressure that is higher than osmotic pressure, and the water molecules that orders about in the feed water sees through reverse osmosis membrane.In positive penetration operation, rely on the osmotic pressure of feed liquid self to realize mass transfer process.The realization of positive process of osmosis need have two necessary factors, and one be for can allowing water by holding back other solute molecules or ionic selectively permeable membrane, and it two is the existing water chemistry potential differences in film both sides, the i.e. needed impellent of transmittance process.
Compare with reverse osmosis, the advantage of just permeating is can be in low pressure even do not have fully to operate under the pressure, and to the rejection height of pollutent, the pollution capacity of anti-the film is stronger.
The turbine power retrieving arrangement is the common equipment of reverse osmosis seawater desalting, begins to use in late 1980s.This kind energy recycle device is simple in structure, and is reliable, is easy to maintenance and repair.The turbo wheel of turbine power retrieving arrangement and pump housing impeller are installed in the same housing, directly impact turbine blade with high-pressure thick salt solution, directly drive force (forcing) pump work by shaft work.
Because this class device is integrated pump impeller and turbine thereby can be worked fully independently, broken away from the constraint that will link with high-pressure pump or motor shaft, make device compact to design, easy disassembling, maintenance is convenient.Studies show that the fluctuation adaptability of this device fluid pressure, flow is better, can maintain about 60% that be adapted at work under the big flow, scale efficiency is obvious in the scope self-energy organic efficiency of broad.
In reverse osmosis seawater desalination system, the energy that the turbine power retrieving arrangement is generally used for reclaiming strong brine pressurizes to advancing seawater.The strong brine pipeline of reverse osmosis seawater desalting links to each other with the turbo wheel of turbine power retrieving arrangement, drives the rotation of pump housing impeller.The raw material seawater pipeline links to each other with pump housing impeller, and pressure is raised, thereby realizes the recovery of strong brine energy.
Summary of the invention
The present invention provides a kind of positive penetration sea water desalinization strong brine processing technology for solving the technical problem that exists in the known technology, and this treatment process causes the rising of local marine site salinity in the time of can avoiding sea water desalinization strong brine row sea, protect the marine environment.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of positive penetration sea water desalinization strong brine processing technology, adopt the forward osmosis membrane assembly, the strong brine that uses sea water desaltination is as drawing liquid, use fresh water as feeding liquid, the strong brine of described sea water desaltination described forward osmosis membrane assembly see through part mixing of fresh water that side and feeding liquid side see through to become dilution after salt solution up to standard after discharge the forward osmosis membrane assembly, described feeding liquid remainder discharge forward osmosis membrane assembly.
Salt solution up to standard after the described dilution before discharging the forward osmosis membrane assembly through turbine power retrieving arrangement recovered energy be used to the to pressurize strong brine of described sea water desaltination.
Described fresh water comprises that face of land fresh water and saltiness are lower than the sewage of seawater.
In order to realize above-mentioned positive penetration sea water desalinization strong brine processing technology, the present invention also provides a kind of positive penetration sea water desalinization strong brine treatment system, comprise forward osmosis membrane assembly that feeding liquid water pump, its feeding liquid side be connected with described feeding liquid water pump, draw the liquid water pump with described forward osmosis membrane assembly sees through that side is connected, the feeding liquid side of described forward osmosis membrane assembly is provided with residue feeding liquid relief outlet, described forward osmosis membrane assembly see through salt solution relief outlet up to standard after side is provided with dilution.
The described liquid water pump that draws is connected with described forward osmosis membrane assembly by the turbine power retrieving arrangement, described turbine power retrieving arrangement is connected with the salt solution relief outlet up to standard of described forward osmosis membrane assembly, and described turbine power retrieving arrangement is provided with the salt solution relief outlet up to standard after the dilution.
Advantage and positively effect that the present invention has are: (one) can be diluted to the strong brine of sea water desaltination the level of former seawater, thereby causes the rising of local marine site salinity during the row of avoiding sea, protects the marine environment; (2) in dilution, because the selection perviousness of forward osmosis membrane, though the fresh water sources that enters strong brine is from surface water even sewage, but can not polluted by employed feeding liquid, therefore, the salt solution of discharging after the present invention handles is fit to be utilized again again as the raw water of sea water desaltination; (3) in the process of dilution strong brine, feeding liquid is concentrated simultaneously, and therefore, the present invention can concentrate the sewage that is difficult to degrade, and reduces the difficulty that sewage is further handled; (4) adopt the turbine power retrieving arrangement, only needed electrification to keep feed liquid and flow, in addition do not consumed other electric power substantially, had the characteristics of save energy.
Description of drawings
Fig. 1 is the structural representation of positive penetration sea water desalinization strong brine treatment system of the present invention.
Among the figure: 1, feeding liquid water pump, 2, draw the liquid water pump, 3, the turbine power retrieving arrangement, 4, the forward osmosis membrane assembly.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, the present invention has provided the positive infiltration technology of a kind of application, technology and treatment system that the strong brine of sea water desaltination is handled.
The treatment system that the positive infiltration technology that the present invention proposes uses mainly comprises feeding liquid water pump 1, draws liquid water pump 2, turbine power retrieving arrangement 3, forward osmosis membrane assembly 4.
Above-mentioned treatment system uses the strong brine of sea water desaltination as drawing liquid, uses fresh water as feeding liquid, and operable feeding liquid comprises face of land fresh water, treated sewage etc., and its saltiness is lower than seawater and gets final product.
Under the effect of feeding liquid water pump, feeding liquid enters the forward osmosis membrane assembly, and part fresh water sees through forward osmosis membrane, and the residue feeding liquid is discharged system.
Under the effect of drawing the liquid water pump, strong brine enters the forward osmosis membrane assembly through the pressurization of turbine power retrieving arrangement.In the forward osmosis membrane assembly, with the mixing of fresh water that the feeding liquid side sees through, strong brine is diluted to the level of seawater, discharges the forward osmosis membrane assembly, behind turbine power retrieving arrangement recovered energy, discharges above-mentioned treatment system.
The turbine power retrieving arrangement of system reclaims the salt water pressure up to standard after the dilution, and the liquid that draws that enters system is pressurizeed, and the salt solution up to standard after the dilution is as follows to turbine power retrieving arrangement work:
W
1＝ρ
1×Q
1×P
1
In the formula:
W
1: the salt solution up to standard after the dilution is to turbine power retrieving arrangement work,
ρ
1: the brine density up to standard after the dilution of discharge,
Q
1: the brine flow up to standard after the dilution of discharge,
P
1: the pressure of salt solution up to standard in the turbine power retrieving arrangement after the dilution of discharge falls,
The turbine power retrieving arrangement is as follows to entering above-mentioned treatment system strong brine work:
W
2＝ρ
2×Q
2×P
2
In the formula:
W
2: the turbine power retrieving arrangement is to the strong brine work,
ρ
2: charging strong brine density,
Q
2: charging strong brine flow,
P
2: the charging strong brine raises at the pressure of energy recycle device,
The effciency of energy transfer of turbine power retrieving arrangement is designated as η,
η＝W
2/W
1＝(ρ
2Q
2P
2)/(ρ
1Q
1P
1)
Draw liquid, ρ based on what the present invention adopted
2With ρ
1Numerical value is approaching; Because positive osmosis system pressure drop is lower, P
2With P
1Numerical value is also approaching.Therefore following formula can be reduced to:
η＝Q
2/Q
1
To be designated as Q through the fresh-water flow of forward osmosis membrane assembly
3, then have:
η＝Q
2/Q
1＝Q
2/(Q
2+Q
3)＝1/(1+Q
3/Q
2)
The present invention need be diluted to the strong brine of sea water desaltination the level of former seawater.The concentration of sea water desalinization strong brine is about the twice of former seawater, and promptly η is about 0.5.
The efficiency of conversion of turbine power retrieving arrangement raises with the rising of flow, and for big-and-middle-sized device, efficiency of conversion can reach more than 60% usually.Therefore, can satisfy needs of the present invention.
For packaged unit,, can realize purpose of the present invention by the lift that the liquid water pump is drawn in raising if the efficiency of conversion of turbine power retrieving arrangement can not satisfy system's needs.
If desalimtor can provide strong brine with pressure, the liquid pump that draws of the present invention can omit, and strong brine directly enters turbine power retrieving arrangement of the present invention.
See also Fig. 1, under the effect of feeding liquid water pump 1, feeding liquid enters forward osmosis membrane assembly 4, and part fresh water sees through forward osmosis membrane assembly 4, and the residue feeding liquid is discharged system; Under the effect of drawing liquid water pump 2, strong brine is through 3 pressurizations of turbine power retrieving arrangement, enter forward osmosis membrane assembly 4, in forward osmosis membrane assembly 4, the mixing of fresh water that sees through with the feeding liquid side, salt solution up to standard after the dilution is discharged forward osmosis membrane assembly 4, behind turbine power retrieving arrangement 3 recovered energies, and the discharge system.
The present invention utilizes the osmotic pressure between sea water desalinization strong brine and the fresh water (being lower than the sewage of seawater etc. as river, saltiness), fresh water is penetrated in the strong brine, thereby makes strong brine be diluted to the level of seawater.Can be applicable to occasions such as sea water desalinization strong brine disposal, reuse, waste water concentrate.
Although in conjunction with the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (5)
1. positive penetration sea water desalinization strong brine processing technology, it is characterized in that, adopt the forward osmosis membrane assembly, the strong brine that uses sea water desaltination is as drawing liquid, use fresh water as feeding liquid, the strong brine of described sea water desaltination described forward osmosis membrane assembly see through part mixing of fresh water that side and feeding liquid side see through to become dilution after salt solution up to standard after discharge the forward osmosis membrane assembly, described feeding liquid remainder discharge forward osmosis membrane assembly.
2. positive penetration sea water desalinization strong brine processing technology according to claim 1 is characterized in that, the salt solution up to standard after the described dilution before discharging the forward osmosis membrane assembly through turbine power retrieving arrangement recovered energy be used to the to pressurize strong brine of described sea water desaltination.
3. positive penetration sea water desalinization strong brine processing technology according to claim 1 and 2 is characterized in that, described fresh water comprises that face of land fresh water and saltiness are lower than the sewage of seawater.
4. positive penetration sea water desalinization strong brine treatment system, it is characterized in that, comprise forward osmosis membrane assembly (4) that feeding liquid water pump (1), its feeding liquid side be connected with described feeding liquid water pump, draw liquid water pump (2) with described forward osmosis membrane assembly (4) sees through that side is connected, the feeding liquid side of described forward osmosis membrane assembly (4) is provided with residue feeding liquid relief outlet, described forward osmosis membrane assembly (4) see through salt solution relief outlet up to standard after side is provided with dilution.
5. positive penetration sea water desalinization strong brine treatment system according to claim 4, it is characterized in that, the described liquid water pump (2) that draws is connected with described forward osmosis membrane assembly (4) by turbine power retrieving arrangement (3), described turbine power retrieving arrangement (3) is connected with the salt solution relief outlet up to standard of described forward osmosis membrane assembly (4), and described turbine power retrieving arrangement (3) is provided with the salt solution relief outlet up to standard after the dilution.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891281A (en) * | 2010-07-20 | 2010-11-24 | 南京工业大学 | Composite fine particles of forward osmosis driving solution system and application thereof |
| CN101973604A (en) * | 2010-10-29 | 2011-02-16 | 国家海洋局天津海水淡化与综合利用研究所 | Device for desalting forward osmosis seawater |
| CN102284249A (en) * | 2011-06-07 | 2011-12-21 | 天津工业大学 | Method and device for cleaning polluted membrane |
| CN102765836A (en) * | 2012-08-17 | 2012-11-07 | 国家海洋局天津海水淡化与综合利用研究所 | Seawater circulating cooling system based on forward osmosis moisturizing technique |
| CN102974218A (en) * | 2012-11-16 | 2013-03-20 | 新加坡三泰水技术有限公司 | Obverse osmosis membrane reactor and integral type seawater desalination system and integral type seawater desalination technique |
| CN103922530A (en) * | 2014-04-25 | 2014-07-16 | 哈尔滨工业大学 | Circulating forward osmosis and pervaporation integrated water treatment method |
| CN104402161A (en) * | 2014-11-28 | 2015-03-11 | 山东省环科院环境工程有限公司 | Energy-saving petrochemical engineering wastewater deep treatment system and treatment method thereof |
| CN105621533A (en) * | 2014-11-06 | 2016-06-01 | 深圳市嘉泉膜滤设备有限公司 | Seawater desalination system energy recovery device |
| CN106925119A (en) * | 2017-03-10 | 2017-07-07 | 山东大学 | Poly-epoxy succinic acid is used as drawing application of the liquid in positive infiltration |
| CN109095561A (en) * | 2017-06-21 | 2018-12-28 | 北京天诚同创电气有限公司 | Reverse osmosis seawater desalting method and system |
| CN109607684A (en) * | 2019-01-07 | 2019-04-12 | 上海海事大学 | A kind of rotary forward osmosis membrane sewage-treatment plant |
| CN110104812A (en) * | 2019-05-23 | 2019-08-09 | 首钢京唐钢铁联合有限责任公司 | Sewage treatment system |
| CN112551818A (en) * | 2020-12-17 | 2021-03-26 | 广州中国科学院先进技术研究所 | High-salinity organic wastewater treatment system and treatment method |
| CN112854398A (en) * | 2021-01-07 | 2021-05-28 | 大连理工大学 | Strong brine sea water discharging diffuser |
-
2009
- 2009-10-14 CN CN200910070804A patent/CN101671065A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891281B (en) * | 2010-07-20 | 2012-08-08 | 南京工业大学 | Composite fine particles of forward osmosis driving solution system and application thereof |
| CN101891281A (en) * | 2010-07-20 | 2010-11-24 | 南京工业大学 | Composite fine particles of forward osmosis driving solution system and application thereof |
| CN101973604A (en) * | 2010-10-29 | 2011-02-16 | 国家海洋局天津海水淡化与综合利用研究所 | Device for desalting forward osmosis seawater |
| CN102284249A (en) * | 2011-06-07 | 2011-12-21 | 天津工业大学 | Method and device for cleaning polluted membrane |
| CN102765836A (en) * | 2012-08-17 | 2012-11-07 | 国家海洋局天津海水淡化与综合利用研究所 | Seawater circulating cooling system based on forward osmosis moisturizing technique |
| CN102765836B (en) * | 2012-08-17 | 2014-04-09 | 国家海洋局天津海水淡化与综合利用研究所 | Seawater circulating cooling system based on forward osmosis moisturizing technique |
| CN102974218A (en) * | 2012-11-16 | 2013-03-20 | 新加坡三泰水技术有限公司 | Obverse osmosis membrane reactor and integral type seawater desalination system and integral type seawater desalination technique |
| CN103922530A (en) * | 2014-04-25 | 2014-07-16 | 哈尔滨工业大学 | Circulating forward osmosis and pervaporation integrated water treatment method |
| CN103922530B (en) * | 2014-04-25 | 2015-04-22 | 哈尔滨工业大学 | Circulating forward osmosis and pervaporation integrated water treatment method |
| CN105621533A (en) * | 2014-11-06 | 2016-06-01 | 深圳市嘉泉膜滤设备有限公司 | Seawater desalination system energy recovery device |
| CN104402161A (en) * | 2014-11-28 | 2015-03-11 | 山东省环科院环境工程有限公司 | Energy-saving petrochemical engineering wastewater deep treatment system and treatment method thereof |
| CN106925119A (en) * | 2017-03-10 | 2017-07-07 | 山东大学 | Poly-epoxy succinic acid is used as drawing application of the liquid in positive infiltration |
| CN106925119B (en) * | 2017-03-10 | 2019-04-12 | 山东大学 | Poly-epoxy succinic acid is as drawing application of the liquid in positive infiltration |
| CN109095561A (en) * | 2017-06-21 | 2018-12-28 | 北京天诚同创电气有限公司 | Reverse osmosis seawater desalting method and system |
| CN109607684A (en) * | 2019-01-07 | 2019-04-12 | 上海海事大学 | A kind of rotary forward osmosis membrane sewage-treatment plant |
| CN110104812A (en) * | 2019-05-23 | 2019-08-09 | 首钢京唐钢铁联合有限责任公司 | Sewage treatment system |
| CN112551818A (en) * | 2020-12-17 | 2021-03-26 | 广州中国科学院先进技术研究所 | High-salinity organic wastewater treatment system and treatment method |
| WO2022126877A1 (en) * | 2020-12-17 | 2022-06-23 | 广州中国科学院先进技术研究所 | High-salinity organic wastewater treatment system and treatment method |
| CN112854398A (en) * | 2021-01-07 | 2021-05-28 | 大连理工大学 | Strong brine sea water discharging diffuser |
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Open date: 20100317 |