CN109095561A - Reverse osmosis seawater desalting method and system - Google Patents
Reverse osmosis seawater desalting method and system Download PDFInfo
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- CN109095561A CN109095561A CN201710475439.3A CN201710475439A CN109095561A CN 109095561 A CN109095561 A CN 109095561A CN 201710475439 A CN201710475439 A CN 201710475439A CN 109095561 A CN109095561 A CN 109095561A
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- seawater
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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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/06—Energy recovery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/08—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/10—Accessories; Auxiliary operations
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-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
- Y02A20/138—Water desalination using renewable energy
- Y02A20/144—Wave energy
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The embodiment of the invention provides a kind of reverse osmosis seawater desalting method and system, reverse osmosis seawater desalting side's hair therein, comprising: pressurized treatment is carried out to seawater；Desalt processing is carried out to seawater by reverse osmosis membrane, generates strong brine while generating fresh water；While so that seawater is diluted strong brine by permeable membrane, the flow and pressure of strong brine are improved；Turbocharging equipment is driven using the strong brine after dilution, to promote the pressure for the seawater for flowing through the reverse osmosis membrane.The osmotic pressure of the strong brine generated using reverse osmosis seawater desalting method provided in an embodiment of the present invention and system is recycled rather than direct emission, can compensate for the energy loss for substantially reducing counter-infiltration system；Meanwhile strong brine is diluted by this process, reducing in discharge process influences the salinity gradient of briny environment.
Description
Technical field
The present invention relates to field of sea water desalting technology, more particularly to a kind of reverse osmosis seawater desalting method and system.
Background technique
Sea-water reverse osmose desalination technology is highly developed at present, and existing sea-water reverse osmose desalination technology is in production fresh water
While, a large amount of strong brine can be generated, but the existing processing method to strong brine is usually direct emission, is not only given in this way
The salinity gradient of the local briny environment of discharge areas, which is brought, significantly affects that (salinity of general strong brine is the two of seawater salinity
Times), the waste of strong brine is also resulted in, based on the above issues, needs to design and be discharged after a kind of pair of strong brine is diluted, with
Energy regenerating utilization is carried out using strong brine, and reduces the influence to the salinity gradient of briny environment.
Summary of the invention
In view of techniques discussed above problem, the embodiment of the invention provides a kind of reverse osmosis seawater desalting method and it is
System solves the problems, such as that strong brine discharge is directly brought local seawater salinity gradient to increase by existing sea-water reverse osmose desalination method.
According to an aspect of an embodiment of the present invention, a kind of reverse osmosis seawater desalting method is provided, comprising:
Pressurized treatment is carried out to seawater；
Desalt processing is carried out to seawater by reverse osmosis membrane, generates strong brine while generating fresh water；
While so that seawater is diluted strong brine by permeable membrane, the flow and pressure of strong brine are improved；
Turbocharging equipment is driven using the strong brine after dilution, to promote the pressure for the seawater for flowing through the reverse osmosis membrane
Power.
Selectively, it is described by reverse osmosis membrane to seawater carry out desalt processing step before, further includes:
Processing is filtered to seawater.
Selectively, before so that seawater is diluted strong brine step by permeable membrane described, further includes:
The energy that strong brine is recycled by energy recycle device, makes the pressure reduction of strong brine, and is further promoted and flowed through
The pressure of the seawater of the reverse osmosis membrane.
Selectively, after the seawater pressurized treatment made in seawater dilution strong brine step by permeable membrane
Seawater.
Other side according to an embodiment of the present invention provides a kind of reverse osmosis seawater desalination system, comprising:
First supercharging device, for being pressurized to seawater；
Reverse osmosis membrane unit is connect with the outlet of first supercharging device, reverse osmosis for carrying out to seawater, is generated light
Strong brine is generated while water；
Osmosis membrane unit is connect with the brine outlet of the reverse osmosis membrane unit, for making seawater dilute strong brine, and
Improve the flow and pressure of strong brine；
Turbocharging equipment is arranged on the pipeline between first supercharging device and the reverse osmosis membrane unit, institute
The low-pressure fluid entrance for stating turbocharging equipment is connect with the outlet of first supercharging device, the height of the turbocharging equipment
Pressure fluid outlet is connect with the seawater inlet of the reverse osmosis membrane unit, and the turbine of the turbocharging equipment is by the permeable membrane
Strong brine driving after unit dilution, to promote the pressure for the seawater for flowing through the reverse osmosis membrane unit.
Selectively, further include the second supercharging device, be arranged in the turbocharging equipment and the reverse osmosis membrane unit
Between pipeline on, the entrance of second supercharging device is connect with the high pressure fluid output of the turbocharging equipment, described
The outlet of second supercharging device is connect with the seawater inlet of the reverse osmosis membrane unit.
Selectively, further include filter element, the pipeline connecting with the seawater inlet of the reverse osmosis membrane unit is set
On, for being filtered processing to seawater.
Still optionally further, the filter element is located on the entrance pipe or export pipeline of first supercharging device.
Selectively, further include energy recycle device, the strong brine entrance of the energy recycle device with it is described reverse osmosis
The brine outlet of film unit is connected to, and the brine outlet of the energy recycle device and the strong brine of the osmosis membrane unit enter
Mouth connection, drives the energy recycle device by strong brine, promotes seawater inlet and the sea for flowing through the energy recycle device
The pressure of seawater between water out.
Further selectively, the outlet of the seawater inlet of the energy recycle device and first supercharging device connects
Logical, the seawer outlet of the energy recycle device is connected to the seawater inlet of the reverse osmosis membrane unit.
Selectively, the energy recycle device is turbine type energy recycle device or equal pressure energy recycle device.
Selectively, further include third supercharging device, the seawer outlet of the energy recycle device and described anti-is set
On pipeline between the seawater inlet of osmosis membrane unit, the low-pressure fluid entrance and the energy regenerating of the third supercharging device
The seawer outlet of device connects, the high pressure fluid output of the third supercharging device and the seawater inlet of the reverse osmosis membrane unit
Connection.
Selectively, further include the 4th supercharging device, the strong brine entrance and the energy of the osmosis membrane unit are set
It measures on the pipeline between the brine outlet of recyclable device, the low-pressure fluid entrance and the energy of the 4th supercharging device return
The brine outlet of receiving apparatus connects, the high pressure fluid output of the 4th supercharging device and the strong brine of the osmosis membrane unit
Entrance connection.
Selectively, the outlet of the seawater inlet of the osmosis membrane unit and first supercharging device.
Reverse osmosis seawater desalting method provided in an embodiment of the present invention and system can be produced using hyperfiltration sea water desalination
The energy that osmotic pressure acting between raw strong brine and fresh seawater generates, strong brine and fresh seawater, which are utilized, only allows water
Semi-permeable membrane (i.e. permeable membrane) by that can intercept salt ion is kept apart, due to the effect of osmotic pressure, in fresh seawater
Hydrone enters strong brine through semi-permeable membrane.In the process: strong brine obtains fresh water dilution in semi-permeable membrane side, and flow increases
Add, pushes turbo charging installation acting Pressurized fresh seawater；Fresh seawater is constantly concentrated, and reduces flow, and it is flat to reach certain salinity
It is discharged when weighing apparatus.Use the osmotic pressure quilt for the strong brine that reverse osmosis seawater desalting method provided in an embodiment of the present invention and system generate
Recycle rather than direct emission, can compensate for the energy loss for substantially reducing counter-infiltration system；Meanwhile strong brine passes through this
Process is diluted, and reducing in discharge process influences the salinity gradient of briny environment.
Detailed description of the invention
The present invention may be better understood from the description with reference to the accompanying drawing to a specific embodiment of the invention,
In:
By reading detailed description of non-limiting embodiments referring to the drawings, other feature of the invention,
Objects and advantages will become more apparent upon, wherein the same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 is a kind of structural schematic diagram for reverse osmosis seawater desalination system that one embodiment of the invention provides；
Fig. 2 is the structural schematic diagram for another reverse osmosis seawater desalination system that one embodiment of the invention provides.
In figure:
101, the first supercharging device；102, the second supercharging device；103, third supercharging device；104, the 4th supercharging device；
200, reverse osmosis membrane unit；
300, osmosis membrane unit；
400, turbocharging equipment；
500, filter element；
600, energy recycle device.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to implementation
The description of example is used for the purpose of providing by showing example of the invention and better understanding of the invention.The present invention never limits
In any concrete configuration set forth below and algorithm, but cover under the premise of without departing from the spirit of the present invention element,
Any modification, replacement and the improvement of component and algorithm.In the the accompanying drawings and the following description, well known structure and skill is not shown
Art is unnecessary fuzzy to avoid causing the present invention.
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention more
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.In the figure in order to clear
It is clear, it may be exaggerated the thickness of region and layer.Identical appended drawing reference indicates same or similar structure in figure, thus will save
Slightly their detailed description.
In addition, described feature, structure or characteristic can be incorporated in one or more implementations in any suitable manner
In example.In the following description, many details are provided to provide and fully understand to the embodiment of the present invention.However,
It will be appreciated by persons skilled in the art that technical solution of the present invention can be practiced without one in the specific detail or more
It is more, or can be using other methods, constituent element, material etc..In other cases, be not shown in detail or describe known features,
Material or operation are to avoid major technique intention of the invention is obscured.
Referring to figs. 1 and 2: the embodiment of the present invention provides a kind of reverse osmosis seawater desalting method, comprising:
Pressurized treatment is carried out to seawater, booster pump can be used for example；
Desalt processing is carried out to seawater by reverse osmosis membrane, generates strong brine while generating fresh water；Sea after pressurization
Water enters reverse osmosis membrane, under pressure, plays the role of interception to the salt ion in seawater by reverse osmosis membrane, and
Only allow hydrone by reverse osmosis membrane, to realize sea water desalination and generate fresh water and strong brine simultaneously；
While so that seawater is diluted strong brine by permeable membrane, the flow and pressure of strong brine are improved；Strong brine at this time
It can be the high-pressure thick salt directly generated by above step, be also possible to carry out energy regenerating energy by energy recycle device
The low pressure strong brine of pressure reduction later, by the way that under the action of strong brine osmotic pressure, the hydrone in seawater passes through permeable membrane
It enters in strong brine, to be diluted to strong brine, while the flow and pressure of strong brine can be promoted, it can be carried out
It utilizes；
Turbocharging equipment is driven using the strong brine after dilution, to promote the pressure for the seawater for flowing through reverse osmosis membrane, with
This further promotes the fading effect of reverse osmosis membrane, that is, generates more fresh water.
Reverse osmosis membrane and permeable membrane in the embodiment of the present invention, are all semi-permeable membranes, effect the difference is that, reverse osmosis
Hydrone in seawater is realized desalination through semi-permeable membrane by promoting seawater pressure by permeable membrane, and permeable membrane then passes through osmotic pressure
Hydrone in seawater is penetrated into strong brine to reach to the diluted purpose of strong brine.
Reverse osmosis seawater desalting method provided in an embodiment of the present invention can be generated dense using hyperfiltration sea water desalination
The energy that osmotic pressure acting between salt water and fresh seawater generates, by strong brine and fresh seawater using only allow water by
The semi-permeable membrane (i.e. permeable membrane) that salt ion can be intercepted is kept apart, the hydrone due to the effect of osmotic pressure, in fresh seawater
Enter strong brine through semi-permeable membrane, in the process: strong brine obtains fresh water dilution in semi-permeable membrane side, and flow increases, and pushes
Turbo charging installation acting Pressurized fresh seawater；Fresh seawater is constantly concentrated, and reduces flow, row when reaching certain salinity equilibrium
It puts.The osmotic pressure of the strong brine generated using reverse osmosis seawater desalting method provided in an embodiment of the present invention be recycled without
It is direct emission, can compensate for the energy loss for substantially reducing counter-infiltration system；Meanwhile strong brine is diluted by this process,
Reducing in discharge process influences the salinity gradient of briny environment.
Selectively, the embodiment of the present invention is provided in a kind of reverse osmosis seawater desalting method, by reverse osmosis membrane to sea
It further include that processing is filtered to seawater before water carries out desalt processing step.After filtration treatment, it can be ensured that each
The residual that impurity is reduced in pipeline and supercharging equipment, to extend the service life of each supercharging equipment.
Selectively, the embodiment of the present invention is provided in a kind of reverse osmosis seawater desalting method, makes seawater by permeable membrane
Before dilution strong brine step, further includes:
The energy that strong brine is recycled by energy recycle device, makes the pressure reduction of strong brine, and is further promoted and flowed through
The pressure of the seawater of reverse osmosis membrane.
Energy recycle device can recycle the high-pressure energy in strong brine, and the seawater of reverse osmosis membrane is flowed through using its promotion
Pressure keep sea water desalination more efficient so as to increase the seawater flow for flowing through reverse osmosis membrane, and this process does not need
Additional power, so more environmentally friendly efficient.
Selectively, the embodiment of the present invention is provided in a kind of reverse osmosis seawater desalting method, keeps seawater dilute by permeable membrane
Releasing the seawater in strong brine step is the seawater after pressurized treatment.
In the process of implementation, the seawater after pressurized treatment can be separated to a branch to be used to provide height for permeable membrane
Pressure seawater forms pressure between high pressure sea water and low pressure strong brine (low pressure at this time is for the high pressure of seawater)
Infiltration, the osmotic energy generated by means of strong brine itself high concentration, it is possible to further be promoted while diluting strong brine
The pressure of strong brine.
Referring to figs. 1 and 2, the embodiment of the present invention also provides a kind of reverse osmosis seawater desalination system, comprising: first increases
Pressure device 101, reverse osmosis membrane unit 200, osmosis membrane unit 300 and turbocharging equipment 400, wherein
First supercharging device 101, for being pressurized to seawater；First supercharging device 101 therein, can be used for example
Booster pump；
Reverse osmosis membrane unit 200 is connect with the outlet of the first supercharging device 101, reverse osmosis for carrying out to seawater, is generated
Strong brine is generated while fresh water；Seawater after pressurization enters reverse osmosis membrane unit 200, under pressure, by anti-
Permeable membrane plays the role of interception to the salt ion in seawater, and only allows hydrone by reverse osmosis membrane, to realize
Sea water desalination simultaneously generates fresh water and strong brine simultaneously；
Osmosis membrane unit 300 is connect with the brine outlet of reverse osmosis membrane unit 200, for making seawater dilute strong brine,
And improve the flow and pressure of strong brine；Strong brine at this time can be the high-pressure thick directly generated by the first supercharging device 101
Salt water is also possible to the energy recycle device provided by following example and carries out pressure reduction after energy 600 recovers energy
Low pressure strong brine, by the way that under the action of strong brine osmotic pressure, the hydrone in seawater enters strong brine by permeable membrane
In, to be diluted to strong brine, while the flow and pressure of strong brine can be promoted, it can be utilized；
Turbocharging equipment 400 is arranged on the pipeline between the first supercharging device 101 and reverse osmosis membrane unit 200, whirlpool
The low-pressure fluid entrance of wheel supercharging equipment 400 is connect with the outlet of the first supercharging device 101, the high pressure of turbocharging equipment 400
Fluid outlet is connect with the seawater inlet of reverse osmosis membrane unit 200, and the turbine of turbocharging equipment 400 is by osmosis membrane unit 300
Strong brine after dilution drives turbine, to promote the pressure for the seawater for flowing through reverse osmosis membrane unit 200；The turbocharging equipment
400 can be turbocharging pump, be also possible to turbocharger or other equipment for using turbine to be pressurized.
Reverse osmosis membrane unit 200 therein, inside are separated into two chambers by reverse osmosis membrane, and one of chamber is equipped with
Seawater inlet and brine outlet, another chamber are equipped with water outlet；
Osmosis membrane unit 300 therein, internal to be separated into two chambers by permeable membrane, one of chamber is equipped with seawater
Entrance and brine outlet, another chamber are equipped with strong brine entrance and brine outlet.
Reverse osmosis membrane and permeable membrane in the embodiment of the present invention, are all semi-permeable membranes, effect the difference is that, reverse osmosis
Hydrone in seawater is realized desalination through semi-permeable membrane by promoting seawater pressure by permeable membrane, and permeable membrane then passes through osmotic pressure
Hydrone in seawater is penetrated into strong brine to reach to the diluted purpose of strong brine.
Reverse osmosis seawater desalination system provided in an embodiment of the present invention can be generated dense using hyperfiltration sea water desalination
The energy that osmotic pressure acting between salt water and fresh seawater generates, by strong brine and fresh seawater using only allow water by
The semi-permeable membrane i.e. permeable membrane that salt ion can be intercepted is kept apart, and due to the effect of osmotic pressure, the hydrone in fresh seawater is saturating
Semi-permeable membrane enters strong brine, in the process: strong brine obtains fresh water dilution in semi-permeable membrane side, and flow increases, and pushes whirlpool
Wheel pressurizing apparatus acting Pressurized fresh seawater；Fresh seawater is constantly concentrated, and reduces flow, discharge when reaching certain salinity equilibrium.
The osmotic pressure of the strong brine generated using reverse osmosis seawater desalination system provided in an embodiment of the present invention be recycled rather than
Direct emission can compensate for the energy loss for substantially reducing counter-infiltration system；Meanwhile strong brine is diluted by this process, is dropped
The salinity gradient of briny environment is influenced during low emission.
Selectively, a kind of reverse osmosis seawater desalination system provided in an embodiment of the present invention further includes the second supercharging device
102, it is arranged on the pipeline between turbocharging equipment 400 and reverse osmosis membrane unit 200, the entrance of the second supercharging device 102
It is connect with the high pressure fluid output of turbocharging equipment 400, outlet and the reverse osmosis membrane unit 200 of the second supercharging device 102
Seawater inlet connection.Second supercharging device 102, such as high-pressure pump can be selected；It, can be into one by the second supercharging device 102
The pressure for the seawater being lifted into reverse osmosis membrane unit 200 is walked, to improve the sea water desalination effect of reverse osmosis membrane unit 200
Rate.
Selectively, a kind of reverse osmosis seawater desalination system provided in an embodiment of the present invention further includes filter element 500,
It is arranged on the pipeline being connect with the seawater inlet of reverse osmosis membrane unit 200, for being filtered processing to seawater.Filter element
500, such as cartridge filter can be used；Filter element 500 can carry out the seawater for entering reverse osmosis membrane unit 200
Filter prevents the reverse osmosis membrane inside reverse osmosis membrane unit 200 from being blocked by the impurity in seawater.
Selectively, in a kind of reverse osmosis seawater desalination system provided in an embodiment of the present invention, filter element 500 is located at the
On the entrance pipe or export pipeline of one supercharging device 101, filtering is played with the impurity to the seawater entered in system pipeline
Effect, avoid the blocking for leading to reverse osmosis membrane, permeable membrane because of impurity, and avoid impurity on other supercharging equipments tire out
Product, to extend the volume service life of whole system, improves the working efficiency of system, improves the effect of sea water desalination.
Selectively, a kind of reverse osmosis seawater desalination system provided in an embodiment of the present invention, further includes energy recycle device
600, the strong brine entrance of energy recycle device 600 is connected to the brine outlet of reverse osmosis membrane unit 200, energy recycle device
600 brine outlet is connect with the strong brine entrance of osmosis membrane unit 300, drives energy recycle device 600 by strong brine,
Promote the pressure of the seawater between the seawater inlet and seawer outlet that flow through energy recycle device 600.
Selectively, the outlet of the seawater inlet of energy recycle device 600 and the first supercharging device 101, energy return
The seawer outlet of receiving apparatus 600 is connected to the seawater inlet of reverse osmosis membrane unit 200.
Selectively, in a kind of reverse osmosis seawater desalination system provided in an embodiment of the present invention, energy recycle device 600 is
Turbine type energy recycle device or equal pressure energy recycle device.
The selection of energy recycle device 600 can be designed according to the pipe-line layout of system, such as:
The reverse osmosis seawater desalination system that embodiment as shown in Figure 1 provides, seawater from the outlet of the first supercharging device 101 by
The seawater that one branch enters reverse osmosis membrane unit 200 after turbocharging equipment 400, the second supercharging device 102 enters
Mouthful, another branch enters the seawater that reverse osmosis membrane unit 200 is connected to after seawater boosting by energy recycle device 600
Mouth is used as second branch, to form the connection type of multiple branch circuit seawater mixed flow；By the way of multiple branch mixed flows, this reality
Equal pressure energy recycle device can be used in the energy recycle device 600 applied in example.
The reverse osmosis seawater desalination system that embodiment as shown in Figure 2 provides, seawater are first from the outlet of the first supercharging device 101
Afterwards after turbocharging equipment 400, the second supercharging device 102, directly it is pressurized and is sent to anti-by energy recycle device 600
Turbine type energy regenerating dress can be used in the seawater inlet of osmosis membrane unit 200, the energy recycle device 600 in the present embodiment
It sets.
Selectively, a kind of reverse osmosis seawater desalination system provided in an embodiment of the present invention further includes third supercharging device
103, it is arranged on the pipeline between the seawer outlet of energy recycle device 600 and the seawater inlet of reverse osmosis membrane unit 200, the
The low-pressure fluid entrance of three supercharging devices 103 is connect with the seawer outlet of energy recycle device 600, third supercharging device 103
High pressure fluid output connect with the seawater inlet of reverse osmosis membrane unit 200.Reverse osmosis seawater desalting system provided in this embodiment
System is by the way of multiple branch mixed flows.Third supercharging device 103, such as can be pumped using boost in pressure, energy can be improved
The pressure of the seawater of 600 place branch of recyclable device, and it is conveyed to reverse osmosis membrane unit 200.
Selectively, a kind of reverse osmosis seawater desalination system provided in an embodiment of the present invention further includes the 4th supercharging device
104, it is arranged on the pipeline between the strong brine entrance of osmosis membrane unit 300 and the brine outlet of energy recycle device 600,
The low-pressure fluid entrance of 4th supercharging device 104 is connect with the brine outlet of energy recycle device 600, the 4th supercharging device
104 high pressure fluid output is connect with the strong brine entrance of osmosis membrane unit 300.4th supercharging device 104, such as can use
Boost in pressure pump, can be improved the pressure of the strong brine of permeation unit 300.
Selectively, in a kind of reverse osmosis seawater desalination system provided in an embodiment of the present invention, the sea of osmosis membrane unit 300
The outlet of water inlet and the first supercharging device 101.Using the first supercharging device 101 pressurization seawater and be supplied to permeable membrane
Unit 300 is formed to make between high pressure sea water and low pressure strong brine (low pressure at this time is for the high pressure of seawater)
Pressure permeation, the osmotic energy generated by means of strong brine itself high concentration, it is possible to while diluting strong brine into one
Step promotes the pressure of strong brine.
Those skilled in the art will be understood that above-described embodiment is illustrative and not restrictive.In different embodiments
The different technologies feature of middle appearance can be combined, to obtain beneficial effect.Those skilled in the art are in research attached drawing, explanation
On the basis of book and claims, the embodiment of other variations of revealed embodiment is will be understood that and realized.In right
In claim, term " comprising " is not precluded from other devices or steps；Indefinite article "one" be not excluded for it is multiple；Term " the
One ", " second " is for indicating title not for any specific sequence of expression.Any appended drawing reference in claim is not
It should be understood limiting of its scope.The function of the multiple portions occurred in claim can be by an individual hardware
Or software module is realized.Certain technical characteristic appearance are not meant in different dependent claims cannot be by these skills
Art feature is combined to obtain beneficial effect.
Claims (14)
1. a kind of reverse osmosis seawater desalting method characterized by comprising
Pressurized treatment is carried out to seawater；
Desalt processing is carried out to seawater by reverse osmosis membrane, generates strong brine while generating fresh water；
While so that seawater is diluted strong brine by permeable membrane, the flow and pressure of strong brine are improved；
Turbocharging equipment is driven using the strong brine after dilution, to promote the pressure for the seawater for flowing through the reverse osmosis membrane.
2. the method as described in claim 1, which is characterized in that
It is described by reverse osmosis membrane to seawater carry out desalt processing step before, further includes:
Processing is filtered to seawater.
3. the method as described in claim 1, which is characterized in that
It is described so that seawater is diluted strong brine step before, further includes:
The energy that strong brine is recycled by energy recycle device, makes the pressure reduction of strong brine, and further promoted flow through it is described
The pressure of the seawater of reverse osmosis membrane.
4. method as claimed in claim 3, which is characterized in that
Seawater after the seawater pressurized treatment made in seawater dilution strong brine step by permeable membrane.
5. a kind of reverse osmosis seawater desalination system characterized by comprising
First supercharging device (101), for being pressurized to seawater；
Reverse osmosis membrane unit (200) is connect with the outlet of first supercharging device (101), reverse osmosis for carrying out to seawater,
Strong brine is generated while generating fresh water；
Osmosis membrane unit (300) is connect with the brine outlet of the reverse osmosis membrane unit (200), for keeping seawater dilution dense
Salt water, and improve the flow and pressure of strong brine；
Turbocharging equipment (400) is arranged between first supercharging device (101) and the reverse osmosis membrane unit (200)
Pipeline on, the outlet of the low-pressure fluid entrance of the turbocharging equipment (400) and first supercharging device (101) connects
It connecing, the high pressure fluid output of the turbocharging equipment (400) is connect with the seawater inlet of the reverse osmosis membrane unit (200),
Strong brine after the turbine of the turbocharging equipment (400) is diluted by the osmosis membrane unit (300) drives, and is flowed through with being promoted
The pressure of the seawater of the reverse osmosis membrane unit (200).
6. system as claimed in claim 5, which is characterized in that
Further include the second supercharging device (102), is arranged in the turbocharging equipment (400) and the reverse osmosis membrane unit
(200) on the pipeline between, the high-pressure spray of the entrance of second supercharging device (102) and the turbocharging equipment (400)
Body outlet connection, the outlet of second supercharging device (102) is connect with the seawater inlet of the reverse osmosis membrane unit (200).
7. system as claimed in claim 5, which is characterized in that
Further include filter element (500), be arranged on the pipeline being connect with the seawater inlet of the reverse osmosis membrane unit (200),
For being filtered processing to seawater.
8. system as claimed in claim 7, which is characterized in that
The filter element (500) is located on the entrance pipe or export pipeline of first supercharging device (101).
9. system as claimed in claim 5, which is characterized in that
It further include energy recycle device (600), the strong brine entrance and the reverse osmosis membrane list of the energy recycle device (600)
The brine outlet connection of first (200), the brine outlet and the osmosis membrane unit of the energy recycle device (600)
(300) strong brine entrance connection, drives the energy recycle device (600) by strong brine, promotion flows through the energy and returns
The pressure of seawater between the seawater inlet and seawer outlet of receiving apparatus (600).
10. system as claimed in claim 9, which is characterized in that
The outlet of the seawater inlet of the energy recycle device (600) and first supercharging device (101), the energy
The seawer outlet of recyclable device (600) is connected to the seawater inlet of the reverse osmosis membrane unit (200).
11. system as claimed in claim 10, which is characterized in that
The energy recycle device (600) is turbine type energy recycle device or equal pressure energy recycle device.
12. system as claimed in claim 9, which is characterized in that
Further include third supercharging device (103), be arranged the energy recycle device (600) seawer outlet with it is described reverse osmosis
On pipeline between the seawater inlet of film unit (200), the low-pressure fluid entrance and the energy of the third supercharging device (103)
Measure the seawer outlet connection of recyclable device (600), the high pressure fluid output and the reverse osmosis of the third supercharging device (103)
The seawater inlet of permeable membrane unit (200) connects.
13. system as claimed in claim 9, which is characterized in that
Further include the 4th supercharging device (104), is arranged and is returned in the strong brine entrance of the osmosis membrane unit (300) and the energy
On pipeline between the brine outlet of receiving apparatus (600), the low-pressure fluid entrance of the 4th supercharging device (104) with it is described
The brine outlet of energy recycle device (600) connects, the high pressure fluid output and the infiltration of the 4th supercharging device (104)
The strong brine entrance of permeable membrane unit (300) connects.
14. system as claimed in claim 5, which is characterized in that
The outlet of the seawater inlet of the osmosis membrane unit (300) and first supercharging device (101).
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| CN201710475439.3A CN109095561A (en) | 2017-06-21 | 2017-06-21 | Reverse osmosis seawater desalting method and system |
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| CN111992044A (en) * | 2020-09-11 | 2020-11-27 | 江苏坤奕环境工程有限公司 | Energy-saving ultrahigh-power concentration membrane module, membrane bag thereof, water treatment system and method |
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