CN102974218B - Forward osmosis membrane reactor and Integral sea desalination system and desalination process - Google Patents
Forward osmosis membrane reactor and Integral sea desalination system and desalination process Download PDFInfo
- Publication number
- CN102974218B CN102974218B CN201210464814.1A CN201210464814A CN102974218B CN 102974218 B CN102974218 B CN 102974218B CN 201210464814 A CN201210464814 A CN 201210464814A CN 102974218 B CN102974218 B CN 102974218B
- Authority
- CN
- China
- Prior art keywords
- osmosis membrane
- forward osmosis
- sub
- vertical shaft
- membrane reactor
- 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.)
- Active
Links
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
Abstract
The invention provides a kind of forward osmosis membrane reactor and Integral sea desalination system and desalination process.This forward osmosis membrane reactor comprises a pozo, the bottom of described pozo is provided with first and draws liquid storage pool, divider wall is provided with in described pozo, described pozo is divided into cellular sub-vertical shaft by described divider wall, and described sub-vertical shaft comprises one and stores sub-vertical shaft, a sub-vertical shaft of traffic and the sub-vertical shaft of several forward osmosis membranes; This Integral sea desalination system comprises forward osmosis membrane reactor and nanofiltration device, and desalination process comprises and just permeates operation and nanofiltration operation.Operation is simple for Integral sea desalination system of the present invention, is easy to build, and applicability is wide.
Description
Technical field
The present invention relates to field of seawater desalination, be specifically related to a kind of forward osmosis membrane reactor and comprise the Integral sea desalination system of this forward osmosis membrane reactor and corresponding desalination process.
Background technology
Along with the continuous increase of industrial fast development and population, the consumption of water is increasing, the shortage of freshwater resources and pollute a great problem having become the puzzlement world today.In order to address this problem, the resource of desalinization and sewage is more and more paid attention in the whole world.
The area of earth surface 70.8% is awash, and wherein the water resource of 97.5% is the seawater that cannot drink, and it is a kind of strategic choices that the method therefore by desalinizing seawater obtains freshwater resources.At present, desalinization is worldwide widely applied, and large quantities of Seawater Desalination Project has been built in a lot of coastal state and area all in succession.According to statistics: the whole world average speed of desalination installed capacity in the past with annual 12% in 5 years increases, whole world desalination in the end of the year 2010 is produced water scale and is reached 65 × 10
6m
3/ d.
At present, desalination technology mainly contains following four kinds: the way of distillation, as multistage flash evaporation and multiple-effect distillation carry out desalinization.The method needs heating that water is undergone phase transition to become steam, then allow steam condensing collect, and its defect is that heating process energy consumption is very large, and cost is higher; Ion-exchange, utilizes ion exchange resin to isolate fresh water, and its defect is that ion exchange resin is easily saturated, and resin regeneration needs at substantial soda acid, and cost is high; Electroosmose process, utilizes Novel ion exchange membrane that seawater is separated into fresh water and condensed water; Hyperfiltration, adopts reverse osmosis membrane, applies to seawater the external pressure that is greater than its osmotic pressure, and the pure water promoted in seawater passes through reverse osmosis membrane, and the method is simple, but energy consumption is still comparatively large, and cost is higher.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of forward osmosis membrane reactor and comprise the Integral sea desalination system of this forward osmosis membrane reactor and corresponding desalination process, the present invention adopts forward osmosis membrane technique to draw fresh water in seawater, utilize the dense water of nanofiltration device as drawing liquid, reduce investment outlay, cost is low, and operating cost is low.
Technical scheme of the present invention is as follows:
A kind of forward osmosis membrane reactor, described forward osmosis membrane reactor comprises a pozo, the bottom of described pozo is provided with first and draws liquid storage pool, divider wall is provided with in described pozo, described pozo is divided into cellular sub-vertical shaft by described divider wall, and described sub-vertical shaft comprises one and stores sub-vertical shaft, a sub-vertical shaft of traffic and the sub-vertical shaft of several forward osmosis membranes;
Forward osmosis membrane unit is provided with in each described sub-vertical shaft of forward osmosis membrane;
The sub-vertical shaft of described storage is connected with the sub-vertical shaft of described forward osmosis membrane, and the sub-vertical shaft of described forward osmosis membrane and described first draws liquid storage pool and is connected, and the sub-vertical shaft of described traffic and described first draws liquid storage pool and is connected.
Wherein in an embodiment, described forward osmosis membrane reactor is arranged on the position lower than 30 ~ 200 meters, sea level.
Wherein in an embodiment, the upper end closed of the sub-vertical shaft of described storage and the sub-vertical shaft of forward osmosis membrane, the sub-vertical shaft upper end open of described traffic, the sub-vertical shaft of described traffic communicates with air.
Wherein in an embodiment, sub-for described forward osmosis membrane vertical shaft is divided into upper and lower two Room by described forward osmosis membrane unit, the the first concentrated water discharge mouth being provided with the first sea intake in the upper room of the sub-vertical shaft of described forward osmosis membrane and being connected with the sub-vertical shaft of described storage, the lower room of the sub-vertical shaft of described forward osmosis membrane be provided with first draw liquid import and with described first draw that liquid storage pool is connected first draw liquid and export.
Wherein in an embodiment, sub-for described forward osmosis membrane vertical shaft is divided into two Room, left and right by described forward osmosis membrane unit, the concentrated water discharge mouth being provided with sea intake in the left room of the sub-vertical shaft of described forward osmosis membrane and being connected with the sub-vertical shaft of described storage, the right ventricle of the sub-vertical shaft of described forward osmosis membrane is provided with and draws liquid import and draw the liquid that draws that liquid storage pool is connected export with described first.
Wherein in an embodiment, described forward osmosis membrane reactor also comprises sea water preprocessing device.
Another object of the present invention is achieved through the following technical solutions:
A kind of Integral sea desalination system, comprise nanofiltration device, also comprise forward osmosis membrane reactor as above, second concentrated water discharge mouth of described nanofiltration device draws liquid import with first of the sub-vertical shaft of forward osmosis membrane of described forward osmosis membrane reactor and is connected, and the water inlet of described nanofiltration device draws liquid storage pool with first of described forward osmosis membrane reactor and is connected.
Wherein in an embodiment, in the sub-vertical shaft of traffic of described forward osmosis membrane reactor, be provided with the first supply-water pump, described first supply-water pump is used for drawing described first and draws the water inlet that liquid is delivered to nanofiltration device in liquid storage pool.
Wherein in an embodiment, described Integral sea desalination system also comprises second and draws liquid storage pool, described second draws liquid storage pool is communicated with the concentrated water discharge mouth of described nanofiltration device, and described second draws first of the sub-vertical shaft of forward osmosis membrane of liquid storage pool and described forward osmosis membrane reactor draws liquid import and be connected.
Wherein in an embodiment, described nanofiltration device is arranged in the sub-vertical shaft of traffic of described forward osmosis membrane reactor.
The present invention also provides a kind of Integral sea desalinating process, and described desalination process comprises and just permeates operation and nanofiltration operation:
Described operation of just permeating is completed by forward osmosis membrane reactor; Be provided with in described forward osmosis membrane reactor and just permeate sub-vertical shaft, describedly just permeating sub-vertical shaft and be provided with forward osmosis membrane unit, the dense water that described forward osmosis membrane unit adopts nanofiltration device to produce is as drawing liquid, and adopt seawater as feeding liquid, described dense glassware for drinking water has the osmotic pressure higher than seawater, a part of fresh water in seawater flows into the water inlet of nanofiltration device as nanofiltration device form the dense water diluted through forward osmosis membrane and dense water after, and the residue concentrated water drainage of described seawater goes out forward osmosis membrane unit;
Described nanofiltration operation is completed by nanofiltration device; The water inlet of described nanofiltration device is the dense water of the dilution that described forward osmosis membrane reactor produces, and the dense water of described nanofiltration device enters forward osmosis membrane reactor and draws liquid as forward osmosis membrane unit.
The invention has the beneficial effects as follows:
(1) Integral sea desalination system equipment cost of the present invention is low, and operating cost is low, and the equipment needed for device is simple, does not need to arrange external pressure equipment;
(2) forward osmosis membrane device of the present invention adopts the dense water of nanofiltration device as drawing liquid, eliminates investment and equipment that liquid is drawn in configuration, makes the dense water of nanofiltration device obtain effective utilization simultaneously;
(3) operation is simple for Integral sea desalination system of the present invention, is easy to build, and applicability is wide.
Accompanying drawing explanation
Below in conjunction with concrete drawings and the specific embodiments, the present invention is further elaborated.
Fig. 1 is the overall schematic of an embodiment of forward osmosis membrane reactor of the present invention;
Fig. 2 is the sectional view of the A-A of the forward osmosis membrane reactor shown in Fig. 1;
Fig. 3 is the overall schematic of an embodiment of Integral sea desalination system of the present invention;
Fig. 4 is the overall schematic of another embodiment of Integral sea desalination system of the present invention.
Detailed description of the invention
Clearly understand to make forward osmosis membrane reactor of the present invention and comprising the object of the Integral sea desalination system of this forward osmosis membrane reactor and corresponding desalination process, technical scheme and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
Embodiment one
See Fig. 1 and Fig. 2, the invention provides a kind of forward osmosis membrane reactor, described forward osmosis membrane reactor comprises a pozo 1, the bottom of described pozo is provided with first and draws liquid storage pool 2, divider wall is provided with in described pozo, described pozo is divided into cellular sub-vertical shaft by described divider wall, and described sub-vertical shaft comprises one and stores sub-vertical shaft 3, sub-vertical shaft of traffic 4 and the sub-vertical shaft 5 of several forward osmosis membranes; Independent forward osmosis membrane unit 6 is provided with in each described sub-vertical shaft of forward osmosis membrane; The sub-vertical shaft of described storage 3 is connected with the sub-vertical shaft 5 of described forward osmosis membrane, and the sub-vertical shaft of described forward osmosis membrane 5 and described first draws liquid storage pool 2 and is connected, and the sub-vertical shaft of described traffic 4 and described first draws liquid storage pool 2 and is connected.In the present embodiment, in order to save space, be arranged on the medium position of pozo 1 by storing sub-vertical shaft 3, and store sub-vertical shaft 3 and the sub-vertical shaft of several forward osmosis membranes 5 is evenly arranged around the sub-vertical shaft of storage.
Present embodiments provide a kind of forward osmosis membrane reactor, conveniently build, this forward osmosis membrane reactor monolith is a pozo, the bottom of this pozo is provided with first and draws liquid storage pool, and described first draws liquid storage pool is used for drawing liquid after storing dilution after forward osmosis membrane reactor for treatment; Pozo can be divided into the sub-vertical shaft of several functions by arranging divider wall in pozo, one of them sub-vertical shaft is for storing sub-vertical shaft, the sub-vertical shaft of described storage is used for storing the concentrated salt solution after forward osmosis membrane reactor for treatment, one of them sub-vertical shaft is access well, described access well be used for by dilution after the liquid that draws be delivered to aftertreatment device or direct reuse; Remaining sub-vertical shaft is all set to the sub-vertical shaft of forward osmosis membrane, in the sub-vertical shaft of forward osmosis membrane, arrange forward osmosis membrane unit, described forward osmosis membrane unit and the sub-vertical shaft of described forward osmosis membrane is combined closely in case leak-stopping water; Enter to make the dense water after forward osmosis membrane reactor for treatment and store sub-vertical shaft, storing sub-vertical shaft should be connected with the sub-vertical shaft of forward osmosis membrane, stores the bottom that position that sub-vertical shaft should be connected with the sub-vertical shaft of forward osmosis membrane should be arranged on the sub-vertical shaft of forward osmosis membrane; First draws liquid storage pool is used for drawing liquid after storing dilution after forward osmosis membrane reactor for treatment, therefore first draws liquid storage pool and should be connected with the sub-vertical shaft of forward osmosis membrane.The liquid that draws in the present embodiment can be conventional draw liquid, as long as this draws liquid have osmotic pressure higher than seawater.
Forward osmosis membrane in forward osmosis membrane unit in the present embodiment can be the pellicle of any type, as long as they can allow solvent, such as water etc. passes through, but control various types of dissolving solute (sodium salt, sylvite, magnesium salts, calcium salt, villaumite, nitrate, sulfate, carbonate and other salts, sugar, protein and other compounds) to pass through.Described forward osmosis membrane can assemble the assembly being made into various structure, including, but not limited to hollow-fibre membrane, tubular membrane, capillary-pipe film, Flat Membrane and rolled film.The material of forward osmosis membrane can be organic material also can be inorganic material.These materials including, but not limited to cellulose acetate, the material of Triafol T, polysulfones, polytetrafluoroethylene (PTFE), polyamide, other compound types, ceramic material.The structure of forward osmosis membrane can be dissymmetrical structure also can be composite construction (comprising support membrane and composite membrane).
Seawater enters forward osmosis membrane reactor under gravity, then enters the side of the forward osmosis membrane unit of the sub-vertical shaft of forward osmosis membrane; Draw liquid also enters forward osmosis membrane unit opposite side by Action of Gravity Field on the other hand, draw liquid and there is the osmotic pressure higher than seawater, to order about in seawater fresh water at least partially and flowed to the side of drawing liquid by forward osmosis membrane, draw liquid due to what add that a part of fresh water makes solute concentration reduce to be formed dilution and draw liquid.Forward osmosis membrane reactor in the present embodiment produces two kinds of water: a kind of be dilution after draw liquid, another kind is concentrated salt solution.The liquid that draws after dilution enters first and draws liquid storage pool and be delivered to subsequent processing device or direct reuse by access well, and the concentrated salt solution that the side of seawater is formed then enters and stores sub-vertical shaft, can arrange pump 31 and concentrated salt solution is delivered to brine discharge point.Forward osmosis membrane reactor of the present invention is built simple, and invest low, operating cost is low, seawater and draw liquid and enter forward osmosis membrane reactor and all rely on Action of Gravity Field, and forward osmosis membrane does not need external pressure.
Preferably, as a kind of embodiment, described forward osmosis membrane unit 6 is arranged on the position lower than 30 ~ 200 meters, sea level.Be conducive to seawater like this and draw liquid entering system under gravity, and deep sea hydraulic can be utilized to increase the membrane flux of forward osmosis membrane.Along with the increase of the degree of depth of forward osmosis membrane reactor, the hydraulic pressure born with the side of contact with sea water of the forward osmosis membrane of forward osmosis membrane unit also constantly increases.
Preferably, as a kind of embodiment, described forward osmosis membrane unit 6 is arranged on the position lower than 40 meters, sea level.Now, the vertical range between the well head of the sub-vertical shaft of described forward osmosis membrane and sea level is 10 meters, and the vertical range between the shaft bottom of the sub-vertical shaft of described forward osmosis membrane and sea level is 40 meters.More excellent, described forward osmosis membrane reactor is arranged on the position lower than 40 meters, sea level in deep-sea.
Preferably, as a kind of embodiment, the upper end closed of the sub-vertical shaft of described storage 3 and the sub-vertical shaft 5 of forward osmosis membrane, described traffic sub-vertical shaft 4 upper end open, the sub-vertical shaft 4 of described traffic communicates with air.The upper end of the sub-vertical shaft of described traffic communicates with air, and such first to draw the pressure that liquid storage pool 2 bears be exactly atmospheric pressure.When forward osmosis membrane reactor is arranged in deep-sea, pipeline can be utilized to stretch into the bottom and to realize the sub-vertical shaft of traffic and communicate with air.
Preferably, as a kind of embodiment, sub-for described forward osmosis membrane vertical shaft 5 is divided into upper and lower two Room by described forward osmosis membrane unit 6, the the first concentrated water discharge mouth being provided with the first sea intake in the upper room of the sub-vertical shaft of described forward osmosis membrane 5 and being connected with the sub-vertical shaft of described storage, the lower room of the sub-vertical shaft of described forward osmosis membrane be provided with first draw liquid import and with described first draw that liquid storage pool is connected first draw liquid and export.Or, preferably, as a kind of embodiment, sub-for described forward osmosis membrane vertical shaft is divided into two Room, left and right by described forward osmosis membrane unit, the concentrated water discharge mouth being provided with sea intake 51 in the left room of the sub-vertical shaft of described forward osmosis membrane and being connected with the sub-vertical shaft of described storage, the right ventricle of the sub-vertical shaft of described forward osmosis membrane is provided with first and draws liquid import and draw the liquid that draws that liquid storage pool is connected export 52 with described first.In the present embodiment, forward osmosis membrane unit can be arranged on one independently in film framework, by whole independently film frame installation in the sub-vertical shaft of forward osmosis membrane, mechanically forward osmosis membrane unit can be winched to ground like this and carry out maintaining and cleaning.
Preferably, as a kind of embodiment, described forward osmosis membrane reactor also comprises sea water preprocessing device 7.The service life of forward osmosis membrane unit can be extended like this, extend service time.Described sea water preprocessing device can be the simple filter of the conventional suspension such as filtration sandstone, algae.
Embodiment two
See Fig. 3, the present embodiment provides a kind of Integral sea desalination system on the basis of embodiment one, this seawater desalination system comprises nanofiltration device 8 and the forward osmosis membrane reactor described in embodiment one, second concentrated water discharge mouth 81 of described nanofiltration device 8 draws liquid import with first of the sub-vertical shaft of forward osmosis membrane of described forward osmosis membrane reactor and is connected, and the water inlet of described nanofiltration device 8 draws liquid storage pool 2 with first of described forward osmosis membrane reactor and is connected.The present embodiment is using the aftertreatment device of nanofiltration device as forward osmosis membrane reactor, dilution after forward osmosis membrane reactor for treatment drawn the water inlet of liquid as nanofiltration device, and the dense water after nanofiltration device process can as the liquid that draws of forward osmosis membrane reactor, define circulation, achieve the maximum using of water resource, the sewage of the discharge produced is reached and minimizes.Nanofiltration device in the present embodiment can be existing commercially available nanofiltration device.
Preferably, as a kind of embodiment, in the sub-vertical shaft 4 of the traffic of described forward osmosis membrane reactor, be provided with the first supply-water pump 41, described first supply-water pump 41 draws for what draw dilution in liquid storage pool 2 by described first the water inlet that liquid is delivered to nanofiltration device.In the present embodiment, the sub-vertical shaft 4 of traffic communicates with air, therefore needs, by supply-water pump, the liquid that draws after dilution is delivered to nanofiltration device.Preferably, described supply-water pump can be but be not limited to plunger displacement pump, centrifugal pump and membrane pump.Pump material can be any material, if this material can not with dilution draw solute in liquid and solvent reacts, and this material also must can bear enough pressure.The pressure that described compression pump provides is sufficiently large, enables solvent overcome resistance through NF membrane.
Preferably, as a kind of embodiment, described Integral sea desalination system also comprises second and draws liquid storage pool, described second draws liquid storage pool is communicated with the concentrated water discharge mouth of described nanofiltration device, and described second draws first of the sub-vertical shaft of forward osmosis membrane of liquid storage pool and described forward osmosis membrane reactor draws liquid import and be connected.Conveniently draw the storage of liquid, the present embodiment is provided with second and draws liquid storage pool, and described second draws liquid storage pool is used for storing that the dense water of nanofiltration device namely stores forward osmosis membrane reactor draws liquid.Described second draws the top that liquid storage pool is arranged on described forward osmosis membrane reactor.
See Fig. 4, described nanofiltration device 8 can be arranged on the ground, only needs to draw what dilute the water inlet that liquid squeezes into nanofiltration device by supply-water pump.Preferably, as a kind of embodiment, see Fig. 3, described nanofiltration device 8 is arranged in the sub-vertical shaft 4 of traffic of described forward osmosis membrane reactor.Now, second concentrated water discharge mouth 81 of described nanofiltration device 8 draws liquid import 51 with first of the sub-vertical shaft of forward osmosis membrane of described forward osmosis membrane reactor and is connected, and the water inlet 82 of described nanofiltration device 8 draws liquid storage pool 2 with first of described forward osmosis membrane reactor and is connected.Such setting, the pressure that the side of described nanofiltration device is born is atmospheric pressure, and the pressure that the opposite side of described nanofiltration device bears is Underwater Pressure, the pressure reduction of both sides can make the water inlet of drawing liquid and nanofiltration device after diluting not need additionally to apply external pressure by nanofiltration device as driving force, can save equipment investment like this.Nanofiltration device in the present embodiment produces two kinds of water: a kind of infiltration water being through NF membrane, as drinking water, can be transported to assigned address by devices such as supply-water pumps; Be a dense water for nanofiltration concentrate and nanofiltration device, second can be transported to by supply-water pump and draw liquid storage pool.
Embodiment three
The present embodiment provides a kind of Integral sea desalinating process, and described desalination process comprises and just permeates operation and nanofiltration operation:
Described operation of just permeating is completed by forward osmosis membrane reactor; Be provided with in described forward osmosis membrane reactor and just permeate sub-vertical shaft, describedly just permeating sub-vertical shaft and be provided with forward osmosis membrane unit, the dense water that described forward osmosis membrane unit adopts nanofiltration device to produce is as drawing liquid, and adopt seawater as feeding liquid, described dense glassware for drinking water has the osmotic pressure higher than seawater, a part of fresh water in seawater through forward osmosis membrane with draw liquid formed dilute draw liquid after flow into the water inlet of nanofiltration device as nanofiltration device, and the residue concentrated water drainage of described seawater goes out forward osmosis membrane unit; Embodiment one is only a kind of embodiment, can design the vertical shaft of other structures according to design parameter and actual conditions.
Described nanofiltration operation is completed by nanofiltration device; The water inlet of described nanofiltration device be the dilution that produces of described forward osmosis membrane reactor draw liquid, the dense water of described nanofiltration device enters forward osmosis membrane reactor and draws liquid as forward osmosis membrane unit.
Described technical process of just permeating operation is: seawater enters pretreatment unit under gravity, after making seawater quality reach the water quality requirement of forward osmosis membrane unit, enters the sub-vertical shaft of forward osmosis membrane under gravity; Namely the dense water produced by nanofiltration device draw liquid enters forward osmosis membrane unit opposite side by Action of Gravity Field, owing to drawing liquid, there is the osmotic pressure higher than seawater, the fresh water at least partially in seawater is made to be flowed to the side of drawing liquid by forward osmosis membrane, a part of fresh water in seawater through forward osmosis membrane with draw liquid formed dilute draw liquid after flow into the water inlet of nanofiltration device as nanofiltration device, and the residue concentrated water drainage of described seawater goes out forward osmosis membrane unit.
Described operation of just permeating can be run under different process conditions; Described seawater and to draw liquid both can be static in the mode that forward osmosis membrane acts on the surface also can be cross-current type; Described temperature is little to technogenic influence, and described temperature is that the temperature range of 4 DEG C-50 DEG C is run; Described seawater and the pH value drawing liquid are generally 2-11, preferably, described seawater and draw liquid pH value between 6-8.Preferably, in order to keep the structural intergrity of forward osmosis membrane, seawater and draw the hydraulic pressure that liquid two kinds of solution make face upper reaches movable property raw should lower than the mechanical strength of forward osmosis membrane.
The technical process of described nanofiltration operation is: the liquid that draws of dilution draws liquid storage pool from first and enters the water inlet of nanofiltration device as nanofiltration device by elevator pump, and the dense water that nanofiltration device produces is back to forward osmosis membrane reactor as drawing liquid.
When utilizing nanofiltration operation to be separated, under pressure, the liquid that draws of dilution is introduced into the NF membrane surface contact with nanofiltration device.With the process of NF membrane surface contact, the liquid that draws of dilution obtains lasting pressure by compression pump or other modes.Like this, under the driving of hydraulic pressure, the solvent drawn in liquid of dilution enters NF membrane permeate collection device by NF membrane, or is called effluent collector.NF membrane can only allow the water drawn in liquid of dilution pass through and retain solute.Meanwhile, after being separated by NF membrane separating process, drawing liquid and be collected together with some remaining solvents.Draw liquid and some remaining solvents can be again used as just permeating and draw liquid in operation, thus reduce the solute consumption configuring and draw needed for liquid.
Described NF membrane can assemble the assembly being made into various structure, including, but not limited to hollow-fibre membrane, tubular membrane, capillary-pipe film, Flat Membrane and rolled film.Preferably, the material of described NF membrane can be organic material also can be inorganic material.These materials including, but not limited to cellulose acetate, the material of Triafol T, polysulfones, polytetrafluoroethylene (PTFE), polyamide, other compound types, ceramic material.Preferably, described NF membrane structure can be dissymmetrical structure also can be the composite construction comprising support membrane and composite membrane.
Described nanofiltration operation can be run under different process conditions.Preferably, the liquid that draws of described dilution is generally cross-current type in the mode that NF membrane acts on the surface.In described nanofiltration operation, its technological temperature runs the temperature range of 4 DEG C ~ 50 DEG C.The pH value drawing liquid of dilution can be 2-11.Preferably, in some embody rule, pH value range can between 6-8 or neutrality.
Just permeating and referring to that water or other solvents flow to the process of lower water chemistry gesture (or comparatively hyperosmosis) side region by permselectivity membrane from higher water chemistry gesture (or comparatively Hyposmolality) side region.The solution that two kinds have different osmotic is introduced respectively in the both sides with permselectivity membrane, a kind of material liquid (Feedsolution) for having compared with Hyposmolality, another kind of for having the driving liquid (Drawsolution) compared with hyperosmosis, just permeating make use of film both sides solution just permeable pressure head as driving force, water or other solvents can be arrived through permselectivity membrane from material liquid side and drive liquid side.
In order to reach the object that can produce osmotic pressure and make target solvent (pure water) extract from seawater of the present invention, as a kind of embodiment, in the present embodiment, seawater is introduced into and contacts with the one side of forward osmosis membrane or other similar films; Concentration is always introduced into contacts with the other one side of forward osmosis membrane or other similar films higher than the liquid that draws of seawater.This by seawater, forward osmosis membrane with in drawing system that liquid forms, the permeable pressure head that the salinity difference of two kinds of solution produces will become the driving force of system.Under the effect of this driving force, the pure water in seawater will enter through forward osmosis membrane and draw in liquid, and the solvent drawn like this in liquid increases and solute concentration reduces.Along with the quantity of solvent drawn in liquid increases, draw liquid and diluted, what become dilution draws liquid.Then, the liquid that draws of described dilution is collected and the side being transported to NF membrane, by NF membrane separating process, most of solvent extraction of drawing in liquid of dilution is out become final products.
Seawater in the present embodiment can be also bitter, waste water, comprises industrial wastewater, municipal wastewater, the contaminated aqueous solution containing ion and all kinds organic compound; Also can be the secondary effluent of sewage treatment plant.The desalination process of the present embodiment is applicable to multiple-quality water.After the concentrated salt solution of forward osmosis membrane reactor can be collected, be delivered to subsequent technique use, also can process the salt solution or precipitation that generate and contain single solute or multiple solute further, and then re-use as mineral matter or other byproducts.
Finally, it should be noted that, in this patent document, such as the relational terms of first, second grade and so on is only for separating an entity or operation with another entity or operating space, and not necessarily requires or imply to there is any relation or sequentially between these entities or operation.And, in this patent document, term " comprises ", " comprising " or its any other variant, it is intended to contain and nonexcludability comprises, thus make to comprise the process of a series of key element, method, article or equipment, not only comprise these key elements, but also comprise and clearly not listing and other key elements that those skilled in the art can know, or also comprise for the known requisite key element of these processes, method, article or equipment.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a forward osmosis membrane reactor, is characterized in that:
Described forward osmosis membrane reactor comprises a pozo, the bottom of described pozo is provided with first and draws liquid storage pool, divider wall is provided with in described pozo, described pozo is divided into cellular sub-vertical shaft by described divider wall, and described sub-vertical shaft comprises one and stores sub-vertical shaft, a sub-vertical shaft of traffic and the sub-vertical shaft of several forward osmosis membranes;
Forward osmosis membrane unit is provided with in each described sub-vertical shaft of forward osmosis membrane;
The sub-vertical shaft of described storage is connected with the sub-vertical shaft of described forward osmosis membrane, and the sub-vertical shaft of described storage is just permeating the position that sub-vertical shaft is connected be arranged on the described bottom just permeating sub-vertical shaft with described;
The sub-vertical shaft of described forward osmosis membrane and described first draws liquid storage pool and is connected, and the sub-vertical shaft of described traffic and described first draws liquid storage pool and is connected;
Described forward osmosis membrane unit is arranged on the position lower than 30 ~ 40 meters, sea level.
2. forward osmosis membrane reactor according to claim 1, is characterized in that:
The upper end closed of the sub-vertical shaft of described storage and the sub-vertical shaft of forward osmosis membrane, the sub-vertical shaft upper end open of described traffic, the sub-vertical shaft of described traffic communicates with air.
3. forward osmosis membrane reactor according to claim 2, is characterized in that:
Sub-for described forward osmosis membrane vertical shaft is divided into upper and lower two Room by described forward osmosis membrane unit, the the first concentrated water discharge mouth being provided with the first sea intake in the upper room of the sub-vertical shaft of described forward osmosis membrane and being connected with the sub-vertical shaft of described storage, the lower room of the sub-vertical shaft of described forward osmosis membrane be provided with first draw liquid import and with described first draw that liquid storage pool is connected first draw liquid and export.
4. forward osmosis membrane reactor according to claim 2, is characterized in that:
Sub-for described forward osmosis membrane vertical shaft is divided into two Room, left and right by described forward osmosis membrane unit, the concentrated water discharge mouth being provided with sea intake in the left room of the sub-vertical shaft of described forward osmosis membrane and being connected with the sub-vertical shaft of described storage, the right ventricle of the sub-vertical shaft of described forward osmosis membrane is provided with and draws liquid import and draw the liquid that draws that liquid storage pool is connected export with described first.
5. the forward osmosis membrane reactor according to claim 3 or 4, is characterized in that:
Described forward osmosis membrane reactor also comprises sea water preprocessing device.
6. an Integral sea desalination system, comprise nanofiltration device, it is characterized in that: also comprise the forward osmosis membrane reactor described in claim 1 ~ 5 any one, second concentrated water discharge mouth of described nanofiltration device draws liquid import with first of the sub-vertical shaft of forward osmosis membrane of described forward osmosis membrane reactor and is connected, and the water inlet of described nanofiltration device draws liquid storage pool with first of described forward osmosis membrane reactor and is connected;
Described nanofiltration device is arranged in the sub-vertical shaft of traffic of described forward osmosis membrane reactor.
7. Integral sea desalination system according to claim 6, is characterized in that:
Described Integral sea desalination system also comprises second and draws liquid storage pool, described second draws liquid storage pool is communicated with the concentrated water discharge mouth of described nanofiltration device, and described second draws first of the sub-vertical shaft of forward osmosis membrane of liquid storage pool and described forward osmosis membrane reactor draws liquid import and be connected.
8. use the Integral sea desalinating process described in claim 6 or 7, it is characterized in that:
Described desalination process comprises and just permeates operation and nanofiltration operation:
Described operation of just permeating is completed by forward osmosis membrane reactor; Be provided with in described forward osmosis membrane reactor and just permeate sub-vertical shaft, describedly just permeating sub-vertical shaft and be provided with forward osmosis membrane unit, the dense water that described forward osmosis membrane unit adopts nanofiltration device to produce is as drawing liquid, and adopt seawater as feeding liquid, described dense glassware for drinking water has the osmotic pressure higher than seawater, a part of fresh water in seawater flows into the water inlet of nanofiltration device as nanofiltration device form the dense water diluted through forward osmosis membrane and dense water after, and the residue concentrated water drainage of described seawater goes out forward osmosis membrane unit;
Described nanofiltration operation is completed by nanofiltration device; The water inlet of described nanofiltration device is the dense water of the dilution that described forward osmosis membrane reactor produces, and the dense water of described nanofiltration device enters forward osmosis membrane reactor and draws liquid as forward osmosis membrane unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210464814.1A CN102974218B (en) | 2012-11-16 | 2012-11-16 | Forward osmosis membrane reactor and Integral sea desalination system and desalination process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210464814.1A CN102974218B (en) | 2012-11-16 | 2012-11-16 | Forward osmosis membrane reactor and Integral sea desalination system and desalination process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102974218A CN102974218A (en) | 2013-03-20 |
| CN102974218B true CN102974218B (en) | 2016-03-30 |
Family
ID=47848736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210464814.1A Active CN102974218B (en) | 2012-11-16 | 2012-11-16 | Forward osmosis membrane reactor and Integral sea desalination system and desalination process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102974218B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204568A (en) * | 2013-04-19 | 2013-07-17 | 陈俞任 | Automatic sea water desalting well |
| CN107486018B (en) * | 2017-07-26 | 2019-12-27 | 同济大学 | Nanofiltration-forward osmosis combined system adopting commercial nanofiltration membrane and forward osmosis membrane and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101044094A (en) * | 2004-07-14 | 2007-09-26 | 三技水技术私人有限公司 | Desalination apparatus and method |
| WO2011090548A2 (en) * | 2009-12-30 | 2011-07-28 | Chevron U.S.A. Inc. | Method and system using hybrid forward osmosis-nanofiltration (h-fonf) employing polyvalent ions in a draw solution for treating produced water |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4125463A (en) * | 1977-10-27 | 1978-11-14 | Chenoweth James W | Reverse osmosis desalination apparatus and method |
| US5128037A (en) * | 1990-12-27 | 1992-07-07 | Millipore Corporation | Spiral wound filtration membrane cartridge |
| AU2584299A (en) * | 1998-02-09 | 1999-08-23 | Robert L. Mcginnis | Osmotic desalinization process |
| CN1865164A (en) * | 2006-03-31 | 2006-11-22 | 周建恩 | Natural enhancement type seawater desalting well |
| WO2010104895A2 (en) * | 2009-03-09 | 2010-09-16 | Herron John R | Center tube configuration for a multiple spiral wound forward osmosis element |
| CN101671065A (en) * | 2009-10-14 | 2010-03-17 | 国家***天津海水淡化与综合利用研究所 | Positive penetration sea water desalinization strong brine processing technology and processing system |
| WO2011133114A1 (en) * | 2010-04-22 | 2011-10-27 | Nanyang Technological University | Method of producing purified water and apparatus therefor |
| CN101973604B (en) * | 2010-10-29 | 2012-08-22 | 国家***天津海水淡化与综合利用研究所 | Device for desalting forward osmosis seawater |
| CN102745776B (en) * | 2012-07-03 | 2014-04-23 | 中国科学院上海高等研究院 | Method and apparatus for treatment of concentrated reverse osmosis drainage through coupled forward osmosis and reverse osmosis |
-
2012
- 2012-11-16 CN CN201210464814.1A patent/CN102974218B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101044094A (en) * | 2004-07-14 | 2007-09-26 | 三技水技术私人有限公司 | Desalination apparatus and method |
| WO2011090548A2 (en) * | 2009-12-30 | 2011-07-28 | Chevron U.S.A. Inc. | Method and system using hybrid forward osmosis-nanofiltration (h-fonf) employing polyvalent ions in a draw solution for treating produced water |
Non-Patent Citations (1)
| Title |
|---|
| 正向渗透膜分离技术在海水淡化中的应用新进展;崔迎等;《水处理技术》;20100530;第36卷(第05期);论文第5页左栏第2段，第6页左栏第1段、图1d、图2，第7页左栏最后1段-右栏第1段和附图3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102974218A (en) | 2013-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mavukkandy et al. | Brine management in desalination industry: From waste to resources generation | |
| Macedonio et al. | Membrane engineering for green process engineering | |
| Nair et al. | Water desalination and challenges: The Middle East perspective: a review | |
| CN102001763B (en) | Production method for desalting seawater by de-hardening preprocessing | |
| CN101973604B (en) | Device for desalting forward osmosis seawater | |
| CN105000755A (en) | Wastewater zero-emission industrial sewage treatment system and treatment method | |
| CN104803448A (en) | Forward osmosis treatment method of wastewater with high salinity and high organic matter concentration | |
| KR101335445B1 (en) | Device and Method for Desalination | |
| CN206142985U (en) | High processing system who contains zero release of salt industrial waste water | |
| CN207596652U (en) | A kind of highly mineralized mine water near-zero release comprehensive resource PDCES processing systems | |
| CN103102031B (en) | Low pressure seawater desalination plant | |
| CN105461157A (en) | High-salinity high-organic-matter contentwastewater zero discharge method | |
| CN102774994B (en) | Combination membrane Separation and Recovery brine waste technique | |
| CN103408179A (en) | Production method for desalting seawater by hot film coupling | |
| CN105923704A (en) | Forward osmosis draw fluid recycling method, wastewater treatment method and treatment device | |
| CN203990317U (en) | The stifled energy-saving film distiller of a kind of normal pressure anti-soil | |
| CN111792743A (en) | Forward osmosis reverse osmosis (FO-RO) coupled novel seawater desalination process | |
| CN104326615A (en) | Energy-saving high-salt wastewater treatment system and treatment method | |
| CN102974218B (en) | Forward osmosis membrane reactor and Integral sea desalination system and desalination process | |
| CN102872721B (en) | Marine sea water desalinization device and desalinization method | |
| CN111362359B (en) | Method for recycling alginate through forward osmosis concentration of reverse osmosis of driving agent | |
| CN106336058B (en) | A kind of seawater desalination system that positive infiltration is coupled with multistage flash distillation | |
| Belessiotis | Delyannis | |
| CN202107589U (en) | Concentrated water high temperature reverse osmosis treatment equipment | |
| CN108409050B (en) | Zero-emission treatment process for high-salinity wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210820 Address after: Santai building, 2 Changi South Avenue, Singapore Patentee after: Singapore Santai Group Co.,Ltd. Address before: Santai building, No. 2, Jiyou Nuoshi Industrial Park, jiakivu, Singapore Patentee before: Singapore Santai Water Technology Co.,Ltd. Effective date of registration: 20210820 Address after: 188 Minfeng Road, Huangdao District, Qingdao, Shandong Patentee after: Santai Environmental Group Co.,Ltd. Address before: Santai building, 2 Changi South Avenue, Singapore Patentee before: Singapore Santai Group Co.,Ltd. |