CN103443031A - Seawater desalination system and seawater desalination method - Google Patents

Seawater desalination system and seawater desalination method Download PDF

Info

Publication number
CN103443031A
CN103443031A CN2012800095918A CN201280009591A CN103443031A CN 103443031 A CN103443031 A CN 103443031A CN 2012800095918 A CN2012800095918 A CN 2012800095918A CN 201280009591 A CN201280009591 A CN 201280009591A CN 103443031 A CN103443031 A CN 103443031A
Authority
CN
China
Prior art keywords
water
seawater
mentioned
reverse osmosis
osmosis membrane
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.)
Pending
Application number
CN2012800095918A
Other languages
Chinese (zh)
Inventor
大川雄介
北村光太郎
能登一彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of CN103443031A publication Critical patent/CN103443031A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • B01D61/12—Controlling or regulating
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/05—Conductivity or salinity
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/043—Treatment of partial or bypass streams
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/10—Energy recovery
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies

Abstract

The invention provides a seawater desalination system capable of reducing energy for generating fresh water and ensuring the quality of the generated fresh water. The seawater desalination system (1A) is provided with: a wastewater system reverse osmosis membrane treating device (10A) and a seawater system reverse osmosis membrane treating device (20A), wherein the wastewater system reverse osmosis membrane treating device (10A) is used for performing membrane separation treatment on wastewater (W10) to generate wastewater system permeated water (W11) and wastewater system concentrated water (W12); the seawater system reverse osmosis membrane treating device (20A) is used for performing membrane separation treatment on a mixture of the wastewater system concentrated water (W12) and water-collected seawater (W20) to generate seawater system permeated water (W21) and seawater system concentrated water (W22); and the seawater system reverse osmosis membrane treating device (20A) is provided with a seawater system permeated water EC meter (230) for measuring the salt concentration of the seawater system permeated water (W21). The seawater system permeated water (W21) is fed to the wastewater system reverse osmosis membrane treating device (10A) in accordance with the salt concentration of the seawater system permeated water (W21).

Description

Seawater desalination system and method for desalting seawater
Technical field
The present invention relates to seawater desalination system and method for desalting seawater.
Background technology
Before this, known seawater is carried out to membrane separation, generate the sea water desalinating plant of fresh water.This sea water desalinating plant, the pressurised seawater in order to carry out membrane separation, deliver to reverse-osmosis membrane element by the pump equipressure, and the salt concentration of seawater is higher, and institute's energy requirement is larger.
, proposed a kind of seawater desalination system (with reference to patent documentation 1) here, this system has: the low lower water of contrast seawater salt concentration carries out membrane separation, is separated into the 1st handling part through water and condensed water; And the condensed water generated at the 1st handling part as dilution with and in being blended in seawater, make mixing water, this mixing water is carried out to membrane separation, be separated into the 2nd handling part through water and condensed water; According to the influx of lower water, control the 1st handling part and the 2nd handling part.
Seawater desalination system according to patent documentation 1, the mixing water that the condensed water of lower water is blended in seawater carries out membrane separation, and the influx of following water increases, and the salt concentration of mixing water reduces, carry out the occasion of membrane separation with seawater and compare, can reduce for generating the energy of fresh water.
The prior art document
Patent documentation
Patent documentation 1: specially permit communique No. 4499835
Summary of the invention
The problem that invention will solve
But the seawater desalination system of patent documentation 1 record, owing to being influx according to lower water, control the 1st handling part and the 2nd handling part, therefore the water quality of the fresh water generated depends on the influx of lower water.Here, lower water is that to carry out filtration treatment etc. containing inorganic nature waste water such as organic organic wastewater or manufacturing works etc. rear by the water of draining, and the stable supplying of its water quality and the water yield is impossible.Therefore, the seawater desalination system of patent documentation 1 record, be difficult to guarantee the water quality of the fresh water that generates.
The purpose of this invention is to provide a kind of energy that can reduce generation fresh water, can guarantee the seawater desalination system of the fresh water water quality of generation simultaneously.
For solving the means of problem
(1) seawater desalination system is characterized in that having: lower water, by membrane separation, generates the lower water system reverse osmosis membrane processing device that lower water system sees through water and lower water system condensed water; And the mixing water of above-mentioned lower water system condensed water and the seawater of having fetched water, by carrying out membrane separation, generating seawater system, to see through water be condensed water with seawater, has that to measure above-mentioned seawater system be the reverse osmosis membrane processing device through the seawater of the salt concentration determinator of the salt concentration of water; According to the above-mentioned seawater of measuring with above-mentioned salt concentration determinator, being the salt concentration that sees through water, is to see through the above-mentioned lower water system reverse osmosis membrane processing device of water supply by above-mentioned seawater.
According to the invention of (1), lower water system reverse osmosis membrane processing device,, generate lower water system and see through water and lower water system condensed water by membrane separation lower water.Seawater is the reverse osmosis membrane processing device, and the mixing water to lower water system condensed water with the seawater of having fetched water, carry out membrane separation, and generating seawater system, to see through water be condensed water with seawater, has and measure the salt concentration determinator of seawater system through the water salt concentration.See through the salt concentration of water according to seawater system, seawater system is seen through to water system reverse osmosis membrane processing device under water supply.
Thus, at seawater, be in the reverse osmosis membrane processing device, lower water system condensed water that will be lower than seawater salt concentration and the mixing water of seawater, carry out membrane separation, generation sees through water as the seawater system of fresh water, carry out membrane separation with the seawater that salt concentration is higher than mixing water, compare while generating fresh water, can reduce for generating the energy of fresh water.
In addition, for example, the water yield of following water reduces, the water yield that the lower water system generated with lower water system reverse osmosis membrane processing device sees through water and lower water system condensed water reduces, when seawater system sees through the salt concentration rising of water, adopt the low lower water system reverse osmosis membrane processing device of operation factor, the seawater system that this salt concentration rises sees through water, by membrane separation, can guarantee that salt concentration reaches the seawater system of determined benchmark value through water.
Thereby, can provide and reduce for generating the energy of fresh water, the seawater desalination system of water quality in the fresh water of simultaneously having guaranteed to generate.
(2) seawater desalination system, it has lower water is passed through to membrane separation, generate the lower water system reverse osmosis membrane processing device that lower water system sees through water and lower water system condensed water, it is characterized in that having: above-mentioned lower water system condensed water and the mixing water of the seawater of having fetched water are passed through to membrane separation, generating seawater system, to see through water be condensed water with seawater, has that to measure above-mentioned seawater system be the reverse osmosis membrane processing device through the seawater of the salt concentration determinator of the salt concentration of water; And be the salt concentration that sees through water according to the above-mentioned seawater of measuring with above-mentioned salt concentration determinator, controlling above-mentioned lower water system reverse osmosis membrane processing device and above-mentioned seawater is the control device that the reverse osmosis membrane processing device drives.
According to the invention of (2), lower water system reverse osmosis membrane processing device, by membrane separation, generate lower water lower water system and see through water and lower water system condensed water.Seawater is the reverse osmosis membrane processing device, and by the mixing water of lower water system condensed water and seawater, by membrane separation, generating seawater system is condensed water through water and seawater, has and measures the salt concentration determinator that this seawater system sees through the salt concentration of water.Control device sees through the salt concentration of water according to seawater system, controlling lower water system reverse osmosis membrane processing device and seawater is the reverse osmosis membrane processing device.
Thus, at seawater, be in the reverse osmosis membrane processing device, because the lower water system condensed water lower than seawater to salt concentration and the mixing water of seawater carry out membrane separation, generation sees through water as the seawater system of fresh water, therefore carry out membrane separation with the seawater that salt concentration is higher than mixing water, the occasion that generates fresh water is compared, and can reduce for generating the energy of fresh water.
In addition, because the seawater system of the fresh water according to generating sees through the salt concentration of water, controlling lower water system reverse osmosis membrane processing device and seawater is the reverse osmosis membrane processing device, for example, it is high that the salt concentration that sees through water as seawater system compares fixed benchmark value, suppressing seawater is the driving of reverse osmosis membrane processing device, and the salt concentration that seawater system sees through water can be back to fixed benchmark value.
Therefore, can provide and reduce for generating the energy of fresh water, guarantee the seawater desalination system of the water quality of the fresh water that generates simultaneously.
(3) according to the seawater desalination system of (2) record, it is characterized in that also having that above-mentioned seawater system is seen through to the 2nd seawater that water carries out membrane separation is the reverse osmosis membrane processing device; Above-mentioned control device is the salt concentration that sees through water according to the above-mentioned seawater of measuring with above-mentioned salt concentration determinator, by above-mentioned seawater, is to be the reverse osmosis membrane processing device through above-mentioned the 2nd seawater of water supply.
According to the invention of (3), also having the 2nd seawater that seawater system is carried out to membrane separation through water is the reverse osmosis membrane processing device.
Thus, for example, when the lower water system that both made the water yield of lower water reduce, lower water system reverse osmosis membrane processing device generates sees through the salt concentration rising that water reduces with the water yield of lower water system condensed water, seawater system sees through water, be that the seawater system that the reverse osmosis membrane processing device rises to this salt concentration carries out membrane separation through water by the 2nd seawater, can supply with salt concentration and reach the seawater system of determined benchmark value through water.
(4) seawater desalination system of putting down in writing according to (2), it is characterized in that, the seawater system that above-mentioned control device is measured according to above-mentioned salt concentration determinator sees through the salt concentration of water, by above-mentioned seawater, be to see through the above-mentioned lower water system reverse osmosis membrane processing device of water supply, above-mentioned lower water system reverse osmosis membrane processing device, the above-mentioned seawater that will be the reverse osmosis membrane processing unit feeding from above-mentioned seawater is to see through water to carry out membrane separation with the mixing water of water.
According to the invention of (4), see through the salt concentration of water according to seawater system, this seawater system is seen through to water and by lower water system reverse osmosis membrane processing device, carry out membrane separation.
Thus, for example, when the lower water system that had both made the water yield of water instantly reduce, generated by lower water system reverse osmosis membrane processing device sees through the salt concentration rising that water reduces with the water yield of lower water system condensed water, seawater system sees through water, the lower water system reverse osmosis membrane processing device that rate reduces is started in utilization, the seawater system that this salt concentration is risen sees through water and carries out membrane separation, can supply with salt concentration and reach the seawater system of determined benchmark value through water.
(5) seawater desalination system to any one record of (4) according to (2), it is characterized in that, above-mentioned seawater is the reverse osmosis membrane that the reverse osmosis membrane processing device has, and is to be that the influx of seawater of reverse osmosis membrane processing device and salt concentration, predefined above-mentioned seawater are that the seawater system that the reverse osmosis membrane processing device generates sees through the water yield of water and the reverse osmosis membrane that salt concentration selects to have good ratio of desalinization according to the influx of the lower water that flows into above-mentioned lower water system reverse osmosis membrane processing device and salt concentration, the above-mentioned seawater of inflow.
Here, reverse osmosis membrane is to have ratio of desalinization approximately 55% to about 99% various films.In the reverse osmosis membrane processing device, be generally that the ratio of desalinization of reverse osmosis membrane is higher, the lift ability is higher, requires the more pump of energy.
Invention according to (5), from the influx of reverse osmosis membrane processing device of water system and seawater system and salt concentration, predefined seawater be the water yield and the salt concentration that seawater system that the reverse osmosis membrane processing device generates sees through water, select the reverse osmosis membrane of good ratio of desalinization, can adopt the good pump of energy efficiency, further reduce for the energy that generates fresh water.
(6) seawater desalination system is characterized in that having: lower water, by membrane separation, is generated to the lower water system reverse osmosis membrane processing device that lower water system sees through water and lower water system condensed water; Seawater is carried out to membrane separation, and generating seawater system, to see through water and seawater be that the seawater of condensed water is the reverse osmosis membrane processing device; And retention system: have and above-mentioned lower water system is seen through to water and above-mentioned seawater system see through mixing that water mixed and see through the retention basin that water stored and measure the mixing that stores in this retention basin water level gauge through the water water level; Above-mentioned retention system, the water level of measuring according to above-mentioned water level gauge, starting or stopping above-mentioned seawater is the reverse osmosis membrane processing device.
According to the invention of (6), lower water system reverse osmosis membrane processing device, carry out membrane separation to lower water, generates lower water system and see through water and lower water system condensed water.Seawater is the reverse osmosis membrane processing device, and seawater is carried out to membrane separation, and generating seawater system is condensed water through water and seawater.Retention system has: lower water system is seen through to water and seawater system and see through mixing that water mixed and see through the retention basin that water stored and measure the mixing that stores in this retention basin water level gauge through the water water level.And the mixing that retention system is measured according to water level gauge sees through the water level of water, starting or stopping seawater is the reverse osmosis membrane processing device.
Thus, at seawater, be in the reverse osmosis membrane processing device, to salt concentration, the lower water system condensed water lower than seawater and the mixing water of seawater carry out membrane separation, generation sees through water as the seawater system of fresh water, the seawater higher than mixing water with salt concentration carries out when membrane separation generates fresh water comparing, and can reduce for generating the energy of fresh water.
In addition, the mixing mixed through water with seawater system through water according to the lower water system of the fresh water as generating sees through the water level in the retention basin of water, starting or stopping seawater is the reverse osmosis membrane processing device, for example, following water system sees through water and fully generates, in the time of can guaranteeing the desirable water yield, with lower water system reverse osmosis membrane processing device, compare, can stop the more seawater of multipotency is the reverse osmosis membrane processing device.
Thereby, provide and can reduce for generating the energy of fresh water, the seawater desalination system of the desirable water yield in the fresh water that can guarantee to generate simultaneously.
(7) seawater desalination system of putting down in writing according to (6), it is characterized in that, above-mentioned retention system has measures in above-mentioned retention basin the 1st salt concentration determinator that the mixing stored sees through the water salt concentration, above-mentioned lower water system reverse osmosis membrane processing device has measures the 2nd salt concentration determinator that the lower water system generated sees through the water salt concentration, above-mentioned seawater is that the reverse osmosis membrane processing device has the 3rd salt concentration determinator of the seawater system of the generation measured through the water salt concentration, it according to above-mentioned seawater, is the salt concentration that sees through water, above-mentioned lower water system sees through the salt concentration of water and salt concentration that above-mentioned mixing sees through water starts or stops.
Invention according to (7), seawater is the reverse osmosis membrane processing device, see through the salt concentration of water and mix the salt concentration that sees through water and started or stop through the salt concentration of water, lower water system according to seawater system, for example, it is any during higher than fixed benchmark value that following water system sees through the salt concentration of water and mixes the salt concentration that sees through water, by stopping seawater, be the reverse osmosis membrane processing device, the salt concentration that sees through water as the mixing of the fresh water generated can be back in fixed benchmark value.
Thereby, provide and can reduce for generating the energy of fresh water, the seawater desalination system of desirable water quality in the fresh water that can guarantee to generate simultaneously.
(8) method for desalting seawater is characterized in that having: Jiang Xiashui carries out membrane separation, generates the lower water system reverse osmosis membrane processing operation that lower water system sees through water and lower water system condensed water; Above-mentioned lower water system condensed water and the mixing water of the seawater of having fetched water are carried out to membrane separation, and generating seawater system, to see through water and seawater be that the seawater of condensed water is the reverse osmosis membrane processing operation; Measuring above-mentioned seawater is that the salt concentration that sees through the water salt concentration is measured operation; And be the salt concentration that sees through water according to above-mentioned seawater, making above-mentioned seawater is to see through water to be back to the seawater system of above-mentioned lower water system reverse osmosis membrane processing operation through the water cycle operation.
According to the invention of (8), can bring into play the action effect same with the invention of (1).
(9) method for desalting seawater, it is to have Jiang Xiashui to carry out membrane separation, generate the method for desalting seawater that lower water system sees through the lower water system reverse osmosis membrane processing operation of water and lower water system condensed water, it is characterized in that, above-mentioned lower water system condensed water and the mixing water of the seawater of having fetched water are carried out to membrane separation, and generating seawater system, to see through water and seawater be that the seawater of condensed water is the reverse osmosis membrane processing operation; Measuring above-mentioned seawater is that the salt concentration that sees through the water salt concentration is measured operation; And be the salt concentration that sees through water according to above-mentioned seawater, determine that above-mentioned lower water system reverse osmosis membrane processing operation and above-mentioned seawater are that the continuation that the reverse osmosis membrane processing operation continues determines operation.
According to the invention of (9), can bring into play the action effect same with the invention of (2).
(10) method for desalting seawater of putting down in writing according to (9), it is characterized in that also having: see through according to above-mentioned seawater system the above-mentioned seawater system that water carries out membrane separation and see through the water salt concentration, it is the operation that the reverse osmosis membrane processing operation is processed with above-mentioned the 2nd seawater that above-mentioned seawater system is seen through to water.
According to the invention of (10), can bring into play the action effect same with the invention of (3).
(11) method for desalting seawater of putting down in writing according to (9), it is characterized in that also having: the seawater of measuring according to above-mentioned salt concentration mensuration operation is to see through the water salt concentration, and making above-mentioned seawater is to be back to the seawater system of above-mentioned lower water system reverse osmosis membrane processing operation through the water cycle operation through water; Above-mentioned lower water system reverse osmosis membrane processing operation is to be that the mixing water that sees through water and lower water carries out membrane separation through the above-mentioned seawater returned in the water cycle operation by above-mentioned seawater.
According to the invention of (11), can bring into play the action effect same with the invention of (4).
(12) method for desalting seawater is characterized in that having: Jiang Xiashui carries out membrane separation, generates the lower water system reverse osmosis membrane processing operation that lower water system sees through water and lower water system condensed water; Seawater is carried out to membrane separation, and generating seawater system, to see through water and seawater be that the seawater of condensed water is the reverse osmosis membrane processing operation; Above-mentioned lower water system is seen through to water and above-mentioned seawater system and see through mixing that water mixed through water, what in retention basin, store stores operation; Measure in this retention basin the level measuring operation that the mixing stored sees through the water level of water; And the water level of measuring according to above-mentioned level measuring operation, determine whether to carry out the decision operation that above-mentioned seawater is the reverse osmosis membrane processing operation.
According to the invention of (12), can bring into play the action effect same with the invention of (6).
(13) according to the method for desalting seawater of (12) record, it is characterized in that also having: measure the 1st salt concentration mensuration operation that the mixing stored in above-mentioned retention basin sees through the water salt concentration; Measure the 2nd salt concentration mensuration operation that the lower water system generated in above-mentioned lower water system reverse osmosis membrane processing operation sees through the salt concentration of water; And to measure above-mentioned seawater be that the 3rd salt concentration that the seawater system that generates in the reverse osmosis membrane processing operation sees through the salt concentration of water is measured operation; Above-mentioned decision operation, be that minute concentration that sees through the salt of water, above-mentioned lower water system see through the salt concentration of water and the salt concentration that above-mentioned mixing sees through water according to above-mentioned seawater, and whether decision carries out above-mentioned seawater is the reverse osmosis membrane processing operation.
According to the invention of (13), can bring into play the action effect same with the invention of (7).
The invention effect
According to the present invention, provide and can reduce for generating the energy of fresh water, simultaneously, can guarantee seawater desalination system and the method for desalting seawater of the water quality of the fresh water that generates.
The accompanying drawing explanation
Fig. 1 is the summary pie graph of the seawater desalination system of expression the 1st embodiment of the present invention.
Fig. 2 is the summary pie graph of the seawater desalination system of expression the 2nd embodiment of the present invention.
Fig. 3 is the summary pie graph of the seawater desalination system of expression the 3rd embodiment of the present invention.
Embodiment
The<the 1 embodiment>
With reference to Fig. 1, the seawater desalination system 1A of the 1st embodiment of the present invention is described.Fig. 1 is the summary pie graph of the seawater desalination system 1A of expression the 1st embodiment of the present invention.
As shown in Figure 1, the seawater desalination system 1A of the 1st embodiment is as lower device: it has: lower water system reverse osmosis membrane processing device 10A, seawater are reverse osmosis membrane processing device 20A and control device 100A; Lower water W10 and seawater W20 are carried out to membrane separation, and the lower water system generated as fresh water sees through water W21 through water W11 and seawater system.In this specification sheets, seawater W20 is the water existed in sea, Hu,Zhao,Chi etc., is salt concentration at the about about water below 4.0 quality % more than 1.0 quality %.In addition, the lower water W10 in this specification sheets, be containing the water of the rear draining such as processing after filtration such as the inorganic nature waste water of organic organic wastewater or manufacturing works etc., is the water that salt concentration is lower than seawater W20.In addition, the fresh water in this specification sheets, mean the water that salt concentration is low.
Seawater desalination system 1A, this system has: lower water W10 is carried out to membrane separation, generate the lower water system reverse osmosis membrane processing device 10A that lower water system sees through water W11 and lower water system condensed water W12; Lower water system condensed water W12 carries out membrane separation with the mixing water of the seawater W20 fetched water, generating seawater system, to see through water W21 be condensed water W22 with seawater, and the seawater of measuring the Conductivity Meters that this seawater system sees through the salt concentration of water W21 (below be called EC count) 230 is reverse osmosis membrane processing device 20A; And the salt concentration that sees through water W21 according to seawater system, controlling lower water system reverse osmosis membrane processing device 10 and seawater is the control device 100A that reverse osmosis membrane processing device 20A drives.
Seawater desalination system 1A, seawater system sees through the salt concentration of water W21, as long as meet to the benchmark that uses plenum system (not shown) outflow that sees through water, seawater system sees through water W21 and flows out to the delivery system system, when not meeting the benchmark flowed out to the delivery system system, make seawater system see through water W21 and be circulated to lower water system reverse osmosis membrane processing device 10A.Below, respectively forming and being elaborated seawater desalination system 1A.
Lower water system reverse osmosis membrane processing device 10A, bottom line has: the downcomer line L10 that supplies with lower water W10 from system; On downcomer line L10, arrange, filter under the lower water system pre-treatment assembly 11 of contained mud in water W10; With downcomer line L10, be connected, lower water W10 is carried out to membrane separation, generate the lower water system reverse osmosis membrane assembly 12 that lower water system sees through water W11 and lower water system condensed water W12; In downcomer line L10, the force (forcing) pump 13 that the upstream side of water system reverse osmosis membrane assembly 12 arranges under this; The lower water system be connected with lower water system reverse osmosis membrane assembly 12 sees through water pipeline L11A; And the lower water system condensed water pipeline L12 be connected with lower water system reverse osmosis membrane assembly 12.Also have, in this specification sheets, so-called " pipeline ", comprise the negotiable pipeline of fluid, stream, pathway, pipeline etc.
Downcomer line L10, system extension from seawater desalination system 1A, by lower water system pre-treatment assembly 11, with lower water system reverse osmosis membrane assembly 12, be connected, the lower water W10 that has removed mud by lower water system pre-treatment assembly 11 is imported to lower water system reverse osmosis membrane assembly 12.
Lower water system pre-treatment assembly 11 in the upstream side setting of lower water system reverse osmosis membrane assembly 12, adopts the film separated activated sludge method in downcomer line L10, and contained mud in lower water W10 is filtered, removes.In the present embodiment, lower water system pre-treatment assembly 11, have secondary filter film or ultra-filtration membrane (not shown) as filtration medium.Also have, lower water system pre-treatment assembly 11 adopts secondary filter film or ultra-filtration membrane, but is not limited to this in the present embodiment, and other filtration units of removing mud contained in lower water W10 also can adopt.
Lower water system reverse osmosis membrane assembly 12, be connected with the end in the downstream side of downcomer line L10.Lower water system reverse osmosis membrane assembly 12, carry out membrane separation to the lower water of having removed mud with lower water system pre-treatment assembly 11 reverse osmosis membrane for W10 (following also claim " RO film "), generates lower water system and see through water W11 and lower water system condensed water W12.Lower water system reverse osmosis membrane assembly 12 has one or more RO membrane elements (not shown), by these RO membrane elements, removes the dissolved salts in anhydrating.The RO membrane element, according to influx and the salt concentration of the lower water W10 that flows into lower water system reverse osmosis membrane processing device 10A, select the film with suitable ratio of desalinization.Force (forcing) pump 13, arrange in downcomer line L10 is upper, adds and depress water W10, sends to lower water system reverse osmosis membrane assembly 12.
Lower water system sees through water pipeline L11A and lower water system condensed water pipeline L12, with the downstream side of lower water system reverse osmosis membrane assembly 12, is connected.Lower water system sees through water pipeline L11A, is that the lower water system that sees through the RO film is circulated through water W11, and lower water system is seen through to the pipeline of water W11 draining to system.Lower water system condensed water pipeline L12 is the pipeline that does not see through the lower water system condensed water W12 circulation of RO film.Lower water system condensed water pipeline L12, be that reverse osmosis membrane processing device 20 is connected with seawater, to seawater, is that reverse osmosis membrane processing device 20 is supplied with lower water system condensed water W12.
Seawater is reverse osmosis membrane processing device 20A, has: the sea water pipe L20A that supplies with seawater W20 from system; The bacterium that swims arranged on sea water pipe L20A, contain in filtering sea W20 etc. (below claim again " bacterium, virus, SS(suspended substance) etc. ") sand filtration or VF(ultra-filtration membrane) etc. seawater be pre-treatment assembly 21; With sea water pipe L20A, be connected, seawater W20 carry out membrane separation, generating seawater system, to see through water W21 and seawater be that the seawater of condensed water W22 is reverse osmosis membrane assembly 22; In sea water pipe L20A, the force (forcing) pump 23 that the upstream side that is reverse osmosis membrane assembly 22 at this seawater arranges; With seawater, be that the seawater system that reverse osmosis membrane assembly 22 is connected sees through water pipeline L21A; With seawater, be that the seawater that reverse osmosis membrane assembly 22 is connected is condensed water pipeline L22; The seawater separated through water pipeline L21 from seawater system is that salt concentration is measured pipeline L23; By seawater, be that salt concentration is measured pipeline L23, measuring and delivering to seawater is to see through the EC meter 230 of the salt concentration of water W21 through the seawater system of water pipeline L21; The seawater system separated through water pipeline L21 from seawater system sees through water drain line L24; And the seawater system separated through water pipeline L21 from seawater system sees through water-circulation pipe L25.
Sea water pipe L20A, from the system extension of seawater desalination system 1A, be pre-treatment assembly 21 by seawater, with seawater, is that reverse osmosis membrane assembly 22 is connected.In addition, sea water pipe L20A, be that pre-treatment assembly 21 and seawater are the lower water system condensed water pipeline tie point J12 between reverse osmosis membrane assembly 22 at seawater, with lower water system condensed water pipeline L12, is connected.Force (forcing) pump 23, in sea water pipe L20A is upper, arrange, by seawater be pre-treatment assembly 21 except degerming, the seawater W20 of SS etc. with from the mixing water of the lower water system condensed water W12 that supplies with of water system reverse osmosis membrane processing device 10A pressurizeed, delivering to seawater is reverse osmosis membrane assembly 22.
Seawater is pre-treatment assembly 21, be seawater in sea water pipe L20A be reverse osmosis membrane assembly 22 the upstream side setting, adopt membrane separation that bacterium contained in seawater W20, virus, SS etc. are filtered, remove.Seawater in the present embodiment is pre-treatment assembly 21, after seawater W20 is carried out to sand filtration, adopts ultra-filtration membrane (not shown) to carry out membrane separation.Also have, seawater is pre-treatment assembly 21, adopts ultra-filtration membrane in the present embodiment, but is not limited to this, also can adopt other filtering membranes such as secondary filter film that can remove bacterium contained in seawater W20, SS or viral SS.
Seawater is reverse osmosis membrane assembly 22, is connected to the downstream side of sea water pipe L20A.Seawater is reverse osmosis membrane assembly 22, by seawater be pre-treatment assembly 21 except degerming, the seawater W20 of virus, SS etc. with from the mixing water of lower water system condensed water W12 of water system reverse osmosis membrane processing device 10 supplies, carry out membrane separation with reverse osmosis membrane, generating seawater system is condensed water W22 through water W21 and seawater.Seawater is reverse osmosis membrane assembly 22, has one or more RO membrane elements (not shown), adopts these RO membrane elements, except the dissolved salts in anhydrating.The RO membrane element, be to be the water yield and the salt concentration that seawater system that reverse osmosis membrane processing device 20 generates sees through water W21 according to flowing into the influx of seawater W20 that seawater is reverse osmosis membrane processing device 20 and salt concentration, predefined seawater, select the film of suitable ratio of desalinization.
Seawater system sees through water pipeline L21A and seawater is condensed water pipeline L22, and being connected to seawater is the downstream side of reverse osmosis membrane assembly 22.Seawater system sees through water pipeline L21A, is to see through the pipeline of the seawater system of RO film through water W21 circulation.Seawater system sees through water pipeline L21A, with seawater be that salt concentration is measured pipeline L23, seawater system sees through water drain line L24, from upstream side, connect successively.In addition, in seawater system sees through water pipeline L21A, in end of downstream side, seawater system is set and sees through water-circulating pump 250.Seawater system sees through water pipeline L21A, by seawater, is to see through water-circulating pump 250, in seawater system, through water-circulation pipe L25 is upper, connects, and makes seawater system see through water W21 and is circulated to lower water system reverse osmosis membrane processing device 10A.
Seawater is condensed water pipeline L22, is that the seawater that does not see through the RO film is that condensed water W22 is circulated, and is seawater that condensed water W22 drains into the outer pipeline of system.Seawater is that salt concentration is measured pipeline L23, and from seawater, system sees through water pipeline L21, and at salt concentration mensuration line branches point, J23 carries out branch, and circulation seawater system sees through water W21, with the seawater system as the salt concentration determinator, through water EC meter 230, is connected.Seawater system sees through water EC meter 230, and as salt concentration mensuration operation, measuring seawater is that salt concentration is measured the electric conductivity of the seawater system of pipeline L23 circulation through water W21, is converted into salt concentration.Seawater is to see through water EC meter 230, and with control device, 100A is connected, and the seawater system measured is sent to control device 100A through the electric conductivity of water W21 or the salt concentration of conversion.
Seawater system sees through water drain line L24, from seawater, system sees through water pipeline L21, seeing through water drain line tapping point J24 in seawater system and carry out branch, is to see through water wet-pit 240 by seawater, and seawater system is seen through to the pipeline that water W21 flows out to delivery system (not shown).Seawater system sees through water wet-pit 240, comprise magnetic valve or motorized valve, its structure is: by the control of control device 100A, the benchmark that the salt concentration that seawater system sees through water W21 as met flows out to delivery system, seawater system flows out to delivery system through water W21, the salt concentration that sees through water W21 as seawater system does not meet the benchmark flowed out to delivery system, stops that seawater system is seen through to water W21 and flows out to delivery system.
Seawater system sees through water-circulation pipe L25, sees through water-circulating pump 250 from seawater system and extends, and sees through water-circulation pipe tie point J25 with the seawater system of downcomer line L10 and is connected.Seawater system sees through water-circulation pipe L25, is to make seawater system see through the pipeline of the downward water system reverse osmosis membrane processing of water W21 device 10A circulation.Seawater system sees through water-circulating pump 250, comprise magnetic valve or motorized valve, by control device, 100A is controlled, its structure is: the salt concentration that sees through water W21 as seawater system meets the benchmark flowed out to delivery system (not shown), seawater system sees through not water system reverse osmosis membrane processing device 10A circulation downwards of water W21, the salt concentration that sees through water W21 as seawater system does not meet the benchmark flowed out to delivery system, and seawater system sees through the downward water system reverse osmosis membrane processing of water W21 device 10A circulation.
Control device 100A, form in each key element of seawater desalination system 1A, with the key element of being controlled, is electrically connected to.In detail, control device 100A, counting 230 seawater of measuring according to seawater system through water EC is the salt concentration that sees through water W21, and force (forcing) pump 13, force (forcing) pump 23, seawater are controlled through water-circulating pump 250 through water wet-pit 240 and seawater system.
Secondly, the action of seawater desalination system 1A described.At first, control device 100A, the control that force (forcing) pump 13 and force (forcing) pump 23 are driven.Thus, drive lower water system reverse osmosis membrane processing device 10A, supply with from system, removed the lower water W10 of mud by lower water system pre-treatment assembly 11, import lower water system reverse osmosis membrane assembly 12.Import the lower water W10 of lower water system reverse osmosis membrane assembly 12, carry out membrane separation, generate lower water system and see through water W11 and lower water system condensed water W12.Lower water system sees through water W11 draining outside system, and it is reverse osmosis membrane processing device 20A that lower water system condensed water W12 is supplied with to seawater.
In addition, driving seawater is reverse osmosis membrane processing device 20A, from system, supply with, by seawater be pre-treatment assembly 21 except degerming, the seawater W20 of virus, SS etc., with from the lower water system condensed water W12 that supplies with of water system reverse osmosis membrane processing device 10A mixed, importing seawater is reverse osmosis membrane assembly 22.Importing seawater is that the seawater W20 of reverse osmosis membrane assembly 22 and the mixing water of lower water system condensed water W12 carry out membrane separation, and generating seawater system is condensed water W22 through water W21 and seawater.Seawater system sees through water W21 and flows out to seawater system and see through water pipeline L21A, and seawater to be condensed water W22 drain into outside system.
And seawater system is through water EC meter 230, mensuration sees through the salt concentration of the seawater system of water pipeline L21A outflow through water W21 to seawater system, delivers letters to control device 100.Control device 100A, determine operation as continuing, and carries out following processing.Control device 100A, see through water EC from seawater system and count the salt concentration that the 230 seawater systems of delivering letters see through water W21, when meeting the benchmark flowed out to delivery system (not shown), open seawater system through water wet-pit 240, close seawater system and see through water-circulating pump 250, controlled.Thus, seawater system flows out to delivery system through water W21.
In addition, control device 100A, when from seawater system, seeing through salt concentration that seawater system that water EC meter 230 delivers letters sees through water W21 and not meeting the benchmark flowed out to delivery system, as seawater, system sees through the water cycle operation, open seawater system and see through water-circulating pump 250, close seawater system and see through water wet-pit 240, by reducing the output rating of force (forcing) pump 23, reduced the control of flow simultaneously.Thus, seawater system sees through water W21, by seawater, is to see through water-circulation pipe L25, is circulated to lower water system reverse osmosis membrane processing device 10A, by lower water system reverse osmosis membrane processing device 10A and seawater, is that reverse osmosis membrane processing device 20A carries out membrane separation again.In addition, reduce the amount that seawater is seawater W20 water intaking in reverse osmosis membrane processing device 20.
Seawater desalination system 1A according to the 1st embodiment, can bring into play following effect.
Seawater is in reverse osmosis membrane processing device 20A, the lower water system condensed water W12 that salt concentration is lower than seawater W20 and the mixing water of seawater W20 carry out membrane separation, generation sees through water W21 as the seawater system of fresh water, the seawater W20 higher than mixing water with salt concentration carries out membrane separation, compare while generating fresh water, can reduce for generating the energy of fresh water.In addition, for example, when the lower water system that had both made the water yield reduction of lower water W10, lower water system reverse osmosis membrane processing device 10A generate rises through water W21 salt concentration through water yield reduction, the seawater system of water W11 and lower water system condensed water W12, the lower water system reverse osmosis membrane processing device 10A that rate reduces is started in utilization, the seawater system that this salt concentration is risen sees through water W21 and carries out membrane separation, can supply with salt concentration and reach the seawater system of determined concentration through water W21.Thereby, provide and can reduce for generating the energy of fresh water, can guarantee the seawater desalination system 1A of the fresh water water quality of generation simultaneously.
In addition, because the seawater system of the fresh water according to as generating sees through the salt concentration of water W21, controlling lower water system reverse osmosis membrane processing device 10A and seawater is reverse osmosis membrane processing device 20A, so for example, when the salt concentration that sees through water W21 when seawater system does not meet the benchmark flowed out to delivery system, suppressing seawater is the driving of reverse osmosis membrane processing device 20A, and the salt concentration that seawater system sees through water W21 can be back to fixed concentration.
In addition, from water system reverse osmosis membrane processing device 10A and seawater be that the influx of reverse osmosis membrane processing device 20A and salt concentration, predefined seawater are the water yield and the salt concentration that seawater system that reverse osmosis membrane processing device 20A generates sees through water W21, selection has the reverse osmosis membrane of suitable ratio of desalinization, can adopt the good pump of energy efficiency 13,23, more reduce for generating the energy of fresh water.
The<the 2 embodiment>
Secondly, the 2nd embodiment of the present invention is described.About the 2nd embodiment, mainly to using and describe as center with the difference of the 1st embodiment, the formation for same with the 1st embodiment, adopt same symbol, describes in detail and omit.The point be not specifically noted in the 2nd embodiment, can suitably be suitable for the explanation of the 1st embodiment.
With reference to Fig. 2, the seawater desalination system 1B of the 2nd embodiment is described.Fig. 2 is the summary pie graph of the seawater desalination system 1B of expression the 2nd embodiment of the present invention.The seawater desalination system 1B of the 2nd embodiment, with the seawater desalination system 1A of the 1st embodiment, seawater is the sea water pipe of reverse osmosis membrane processing device, the formation difference that seawater system sees through water pipeline and control device.In addition, the seawater desalination system 1B of the 2nd embodiment, possessing the 2nd seawater that the seawater desalination system 1A of the 1st embodiment do not have is reverse osmosis membrane processing device 30.Seawater desalination system 1B, salt concentration when seawater system through water W21, while meeting the benchmark flowed out to delivery system (not shown), seawater system sees through water W21 and flows out to delivery system, when not meeting the benchmark flowed out to delivery system, it is to carry out membrane separation in reverse osmosis membrane processing device 30 at the 2nd seawater again that seawater system sees through water W21.
Seawater is the sea water pipe L20B of reverse osmosis membrane processing device (the 1st seawater is the reverse osmosis membrane processing device) 20B, system extension from seawater desalination system 1B, by seawater, being pre-treatment assembly 21, is that reverse osmosis membrane assembly (the 1st seawater is reverse osmosis membrane assembly) 22 is connected with seawater.In addition, sea water pipe L20B, at seawater, be that pre-treatment assembly 21 and seawater are the lower water system condensed water pipeline tie point J12 between reverse osmosis membrane assembly 22, with lower water system condensed water pipeline L12, be connected, at lower water system condensed water pipeline tie point J12 and seawater, being that seawater between reverse osmosis membrane assembly 22 is reconcentration water pipeline tie point J32, is that reconcentration water pipeline L32 is connected with seawater.
Seawater is that the seawater system of reverse osmosis membrane processing device 20B sees through water pipeline L21B, and the downstream side that is reverse osmosis membrane assembly 22 with seawater is connected.Seawater system sees through water pipeline L21B and sees through the pipeline of the seawater system of RO film through water W21 circulation.Seawater system sees through water pipeline L21B, with seawater be that salt concentration is measured pipeline L23, seawater system sees through water drain line L24, from upstream side, connect successively.In addition, seawater system sees through water pipeline L21B, and in end of downstream side, seawater being set is pump 210.Seawater system sees through water pipeline L21B, by seawater, is pump 210, with the 2nd seawater, is that reverse osmosis membrane processing device 30 is connected, and to the 2nd seawater, is that reverse osmosis membrane processing device 30 is supplied with seawater system through water W21.
Seawater is that pump 210 comprises magnetic valve or motorized valve, by the following stated, formed: by the control of control device 100B, when the salt concentration that sees through water W21 when seawater system does not meet the benchmark flowed out to delivery system, it is that reverse osmosis membrane processing device 30 is supplied with to the 2nd seawater that seawater system sees through water W21; When the salt concentration that sees through water W21 when seawater system meets to the outflow benchmark of delivery system, seawater system sees through water W21 and flows out to delivery system.
The 2nd seawater is that reverse osmosis membrane processing device 30 has: from seawater, be that reverse osmosis membrane processing device 20B supply seawater system sees through the seawater system of water W21 through water supply pipeline L30; With seawater system see through that water supply pipeline L30 is connected, seawater system seen through to water W21 again carry out membrane separation, the 2nd seawater that to generate seawater system be reconcentration water W32 through water W31 and seawater again is reverse osmosis membrane assembly 32; Seawater system sees through in water supply pipeline L30, the force (forcing) pump 33 arranged by the upstream side that is reverse osmosis membrane assembly 32 at this 2nd seawater; With the 2nd seawater, be that the seawater system that reverse osmosis membrane assembly 32 is connected sees through water pipeline L31 again; And be that the seawater that reverse osmosis membrane assembly 32 is connected is reconcentration water pipeline L32 with the 2nd seawater.
Seawater system sees through water supply pipeline L30, and the seawater that is reverse osmosis membrane processing device 20B from seawater is that pump 210 extends, and with the 2nd seawater, is that reverse osmosis membrane assembly 32 is connected, and it is reverse osmosis membrane assembly 32 that seawater system is imported to the 2nd seawater through water W21.
The 2nd seawater is reverse osmosis membrane assembly 32, and the downstream side that sees through water supply pipeline L30 with seawater system is connected.The 2nd seawater is reverse osmosis membrane assembly 32, and the seawater system that salt concentration is surpassed to determine benchmark value sees through water W21, with reverse osmosis membrane, carries out membrane separation, and it is reconcentration water W32 that generation seawater system sees through water W31 and seawater again.The 2nd seawater is reverse osmosis membrane assembly 32, has one or more RO membrane elements (not shown), by these RO membrane elements, except the dissolved salts in anhydrating.The RO membrane element is that the seawater system of reverse osmosis membrane processing device 30 sees through the influx of water W21 and salt concentration, predefined the 2nd seawater is that the seawater system that reverse osmosis membrane processing device 30 generates sees through the water yield and the salt concentration of water W31 again according to flowing into the 2nd seawater, selects the film with good ratio of desalinization.Force (forcing) pump 33 sees through the upper setting of water supply pipeline L30 in seawater system, and pressurised seawater system sees through water W21, and delivering to the 2nd seawater is reverse osmosis membrane assembly 32.
It is reconcentration water pipeline L32 that seawater system sees through water pipeline L31 and seawater again, and the downstream side that is reverse osmosis membrane assembly 32 with the 2nd seawater is connected.Seawater system sees through water pipeline L31 again, is that the seawater system that sees through the RO film sees through water W31 circulation again, and seawater system sees through the pipeline that water W31 flows out to delivery system (not shown) again.Seawater is reconcentration water pipeline L32, is that the seawater that does not see through the RO film is the pipeline of reconcentration water W32 circulation.Seawater is reconcentration water pipeline L32, with seawater, is that reverse osmosis membrane processing device 20B is connected, and to seawater, is that reverse osmosis membrane processing device 20B supply seawater is reconcentration water W32.
Control device 100B, be electrically connected to the key element of being controlled in each key element that forms seawater desalination system 1B.In detail, control device 100B, see through water EC according to seawater system and count the salt concentration that the 230 seawater systems that measure see through water W21, to force (forcing) pump 13, force (forcing) pump 23, force (forcing) pump 33, seawater, is that pump 210 and seawater system are controlled through water wet-pit 240.
Secondly, the action of seawater desalination system 1B described.Generating lower water system in seawater desalination system 1B is through the action before water W21 through water W11 and seawater, same with the seawater desalination system 1A of the 1st embodiment, and omission is described.
Seawater system is through water EC meter 230, and measuring and flowing out to seawater is that the seawater seen through in water pipeline L21B is the salt concentration that sees through water W21, delivers letters to control device 100B.Control device 100B, determine operation as continuing, and carries out following processing.Control device 100B, when the salt concentration that sees through seawater system that water EC meter 230 delivers letters from seawater system and see through water W21 meets while flowing to the benchmark of delivery system, opened seawater system and see through water wet-pit 240, close the control that seawater is pump 210.Thus, seawater system sees through water W21 and flows to delivery system.
In addition, control device 100B, when the salt concentration that sees through seawater system that water EC meter 230 delivers letters from seawater system and see through water W21 does not meet while flowing to the benchmark of delivery system, as the 2nd seawater, it is the reverse osmosis membrane processing operation, being opened seawater is pump 210, drive force (forcing) pump 33, driving the 2nd seawater is the control of reverse osmosis membrane processing device 30 simultaneously.Thus, seawater system being seen through to water W21 supply the 2nd seawater is reverse osmosis membrane processing device 30.It is reverse osmosis membrane assembly 32 that the seawater system supplied with is imported into the 2nd seawater through water W21, carries out membrane separation, and it is reconcentration water W32 that generation seawater system sees through water W31 and seawater again.Seawater system sees through water W31 again and flows to delivery system.Seawater is that reconcentration water W32 is that condensed water W22 compares with seawater, and salt concentration is low, not draining outside system, and being back to seawater is reverse osmosis membrane processing device 20B.
Seawater desalination system 1B according to the 2nd embodiment, can bring into play following effect.
For example, when the lower water system that had both made the water yield of lower water W10 reduce, generated in lower water system reverse osmosis membrane processing device 10A sees through the salt concentration rising that water W11 reduces with the water yield of lower water system condensed water W12, seawater system sees through water W21, adopting the 2nd seawater is that the seawater system that 30 pairs of these salt concentrations of reverse osmosis membrane processing device rise carries out membrane separation through water W21, can supply with salt concentration and meet the seawater system of benchmark through water W21.
The<the 3 embodiment>
Secondly, the 3rd embodiment of the present invention is described.About the 3rd embodiment, mainly centered by the difference with the 1st embodiment, describe, the formation to same with the 1st embodiment, adopt identical symbol, omits detailed explanation.The point specified in the 3rd embodiment, can suitably be suitable for the explanation of the 1st embodiment.
With reference to Fig. 3, the seawater desalination system 1C of the 3rd embodiment is described.Fig. 3 is the summary pie graph of the seawater desalination system 1C of expression the 3rd embodiment of the present invention.The seawater desalination system 1C of the 3rd embodiment, different from the seawater desalination system 1A of the 1st embodiment, the lower water system of lower water system reverse osmosis membrane processing device sees through water pipeline, seawater is the formation of the seawater system of reverse osmosis membrane processing device through water pipeline and control device.In addition, the seawater desalination system 1C of the 3rd embodiment, possess the retention system 40 that the seawater desalination system 1A of the 1st embodiment does not have.
The lower water system of lower water system reverse osmosis membrane processing device 10C sees through water pipeline L11C, with the downstream side of lower water system reverse osmosis membrane assembly 12, is connected.Lower water system sees through water pipeline L11C, is that the lower water system that sees through the RO film sees through the pipeline that water W11 circulates.Lower water system sees through water pipeline L11C and lower water system salt concentration is measured pipeline L13 and retention system 40, from upstream side, connects successively, supplies with lower water system to retention system 40 and sees through water W11.Lower water system salt concentration is measured pipeline L13, from water system see through water pipeline L11A, measure line branches point J13 at salt concentration and carry out branch, lower water system sees through water W11 and is circulated, and sees through water EC meter 130 with the lower water system of the 2nd salt concentration determinator and is connected.Lower water system sees through water EC meter 130, as the 2nd salt concentration mensuration operation, measures lower water system salt concentration and measures the electric conductivity of the lower water system of pipeline L13 circulation through water W11, is converted into salt concentration.Lower water system sees through water EC meter 130, and with control device, 100C is connected, and the lower water system of measuring is delivered letters to control device 100C through the electric conductivity of water W11 or the salt concentration of conversion.
Seawater is that the seawater system of reverse osmosis membrane processing device 20C sees through water pipeline L21C, and the downstream side that is reverse osmosis membrane assembly 22 with seawater is connected.Seawater system sees through water pipeline L21C, is to see through the pipeline of the seawater system of RO film through water W21 circulation.Seawater system sees through water pipeline L21C and seawater is that salt concentration is measured pipeline L23 and retention system 40, from upstream side, connects successively, supplies with seawater system to retention system 40 and sees through water W21.Seawater is that salt concentration is measured pipeline L23, from seawater, system sees through water pipeline L21C, measure line branches point J23 at salt concentration and carry out branch, circulation seawater system sees through water W21, with the seawater as the 3rd salt concentration determinator, is to see through water EC meter 230 to be connected.Seawater system sees through water EC meter 230, and as the 3rd salt concentration mensuration operation, measuring seawater is that salt concentration is measured the electric conductivity of the seawater system of pipeline L23 circulation through water W21, is converted into salt concentration.Seawater is to see through water EC meter 230, and with control device, 100C is connected, and the seawater system measured is delivered letters to control device 100C through the electric conductivity of water W21 or the salt concentration of conversion.
Retention system 40 has: seeing through water pipeline L11C and seawater with the lower water system of lower water system reverse osmosis membrane processing device 10C is that the seawater system of reverse osmosis membrane processing device 20C sees through the retention basin 41 that water pipeline L21C is connected; The retention basin water discharge line L41 that connects retention basin 41; Measure the water level gauge 42 of retention basin 41 water levels; The retention basin salt concentration be connected with retention basin 41 is measured pipeline L43; And the retention basin EC meter 430 of conduct the 1st salt concentration determinator be connected with retention basin salt concentration mensuration pipeline L43.
Retention basin 41, from the lower water system supplied with of water system reverse osmosis membrane processing device 10C see through water W11 and be that seawater system that reverse osmosis membrane processing device 20C supplies with sees through the mixing that water W21 mixed and stored through water W40 from seawater.Retention basin water discharge line L41, be connected with the bottom of retention basin 41, makes to mix the pipeline that flows to delivery system (not shown) through water W40.Water level gauge 42 is measured the water level that the mixing stored in retention basin 41 sees through water W41.Water level gauge 42 is connected with control device 100C, and the water level that the mixing of measuring is seen through to water W40 is delivered letters to control device 100C.Water level gauge 42, have at the configuration of the bottom of retention basin 41, pressure transmitter that detect hydraulic pressure, from the pressure type water level gauge of the change detection water level of hydraulic pressure, but also is not limited to this, can use optical water gauge or ultrasonic type water level gauge.
The retention basin salt concentration is measured pipeline L43, extends near the bottom of retention basin 41, and circulation mixes through water W40, with retention basin EC meter 430, is connected.Retention basin EC meter 430, measure operation as the 1st salt concentration, measures the retention basin salt concentration and measure the electric conductivity that the mixing of pipeline L43 circulation sees through water W40, is converted into salt concentration.Retention basin EC meter 430, with control device, 100C is connected, and the mixing of measuring is delivered letters to control device 100C through the electric conductivity of water W40 or the salt concentration of conversion.
Control device 100C, in each key element that forms seawater desalination system 1C, be electrically connected to the key element of being controlled.In detail, control device 100C, the mixing of measuring according to water level gauge 42 sees through the water level of water W40, lower water system and sees through salt concentration, seawater system that lower water systems that water EC meter 130 measures see through water W11 and see through seawater system that water EC meter 230 measures and see through the salt concentration that the salt concentration of water W21 or mixing that retention basin EC meter 430 is measured see through water W40, controls force (forcing) pump 13 or force (forcing) pump 23.
Secondly, the action of seawater desalination system 1C described.Generating lower water system in seawater desalination system 1C is through the action before water W21 through water W11 and seawater, same with the seawater desalination system 1A of the 1st embodiment, and omission is described.The lower water system that lower water system reverse osmosis membrane processing device 10C generates sees through water W11 and seawater is that the seawater system that reverse osmosis membrane processing device 20C generates sees through water W21, forms the mixing mixed and sees through water W40, in the retention basin 41 of retention system 40, stores.The mixing stored in retention basin 41 sees through water W40, from the retention basin water discharge line, L41 flow to delivery system, but water system sees through the growing amount (mixing the growing amount that sees through water W40) that water W11 and seawater system see through water W21 and is greater than while mixing the water displacement that sees through water W40 instantly, mixing, see through water W40 and store in retention basin 41.And water level gauge 42, measure the water level that the mixing stored in retention basin 41 sees through water W40, delivers letters to control device 100C.
Control device 100C, as determining operation, carry out following processing.
Control device 100C, when the water level that sees through water W40 when the mixing of delivering letters from water level gauge 42 reaches fixed seawater and is reverse osmosis membrane processing device stopping water level, stop force (forcing) pump 23, and stopping seawater is the driving of reverse osmosis membrane processing device 20C.Thus, seawater desalination system 1C, form the state that only drives lower water system reverse osmosis membrane processing device 10C, only to retention basin 41, supplies with lower water system and see through water W11.
And for example, the growing amount (mixing the growing amount that sees through water W40) that water system sees through water W11 instantly is less than while mixing the water displacement that sees through water W40, the water level that the mixing in retention basin 41 sees through water W40 descends.Control device 100C, when the water level that sees through water W40 when the mixing of delivering letters from water level gauge 42 reaches fixed seawater and is the beginning water level of reverse osmosis membrane processing device, drive force (forcing) pump 23, and the starting seawater is reverse osmosis membrane processing device 20C.Also have, fixed seawater is that the reverse osmosis membrane processing device starts water level, and can be set in than fixed seawater is the low position of reverse osmosis membrane processing device stopping water level.Thus, seawater desalination system 1C, the lower water system reverse osmosis membrane processing device 10C of formation driving and seawater are the state of reverse osmosis membrane processing device 20C again, supplying with lower water system to retention basin 41 is to see through water W21 through water W11 and seawater.
On the other hand, for example, the growing amount (mixing the growing amount that sees through water W40) that water system sees through water W11 instantly is greater than while mixing the water displacement that sees through water W40, and the water level that the mixing in retention basin 41 sees through water W40 rises once again.Control device 100C, the water level that sees through water W40 when the mixing of delivering letters from water level gauge 42 reaches when fixed be all-trans permeable membrane treatment unit stopping water level, stop force (forcing) pump 13 and force (forcing) pump 23, stopping lower water system reverse osmosis membrane processing device 10A and seawater is the driving of reverse osmosis membrane processing device 20C.Also have, being set in the permeable membrane treatment unit stopping water level that is all-trans than fixed seawater is the high position of reverse osmosis membrane processing device stopping water level.Thus, seawater desalination system 1C, reach lower water system reverse osmosis membrane processing device 10C and seawater and be reverse osmosis membrane processing device 20C both all the full cut-off in stopping stop state, can prevent the overflow of retention basin 41.And, stop state at this full cut-off, control device 100C, the water level that sees through water W40 when the mixing of delivering letters from water level gauge 42 reduces, when reaching fixed seawater and being reverse osmosis membrane processing device stopping water level, again drive force (forcing) pump 13, the lower water system reverse osmosis membrane processing device 10C of starting.
In addition, control device 100C, instantly water system sees through lower water systems that water EC meter 130 measures and sees through water W11 salt concentration, seawater system and see through seawater system that water EC meter 230 measures and see through salt concentration any that the salt concentration of water W21 or mixing that retention basin EC meter 430 is measured see through water W40, do not meet while flowing to the benchmark of delivery system, force (forcing) pump 23 is stopped, and stopping seawater is the control of reverse osmosis membrane processing device 20C.Thus, seawater desalination system 1C, form and only descend the driven state of water system reverse osmosis membrane processing device 10C, only to retention basin 41, supplies with lower water system and see through water W11.
Seawater desalination system 1C according to the 3rd embodiment, can bring into play following effect.
At seawater, be in reverse osmosis membrane processing device 20C, the lower water system condensed water W12 that salt concentration is lower than seawater W20 and the mixing water of seawater W20 carry out membrane separation, generation sees through water W21 as the seawater system of fresh water, the seawater W20 higher than mixing water with salt concentration, carry out membrane separation, compare while generating fresh water, can reduce for generating the energy of fresh water.In addition, according to the lower water system of the fresh water as generating, through water W11 and seawater, be that the mixing mixed through water W21 sees through the water level of water W40 in retention basin 41, starting or stopping seawater is reverse osmosis membrane processing device 20C, for example, instantly water system can fully generate through water W11, while guaranteeing the desirable water yield, with lower water system reverse osmosis membrane processing device 10C, compare, can stop the more seawater of energy is reverse osmosis membrane processing device 20C.Thereby, provide and can reduce for generating the energy of fresh water, guarantee the seawater desalination system 1C of the desirable water quality of fresh water of generation simultaneously.
In addition, seawater is reverse osmosis membrane processing device 20C, owing to according to seawater system, through the salt concentration of water W21, lower water system, seeing through the salt concentration of water W11 and mixing the salt concentration that sees through water W40, started or stopped, so for example, lower water system sees through the salt concentration of water W11 and mixes the salt concentration that sees through water W40, and any to compare fixed benchmark value high, and stopping seawater is reverse osmosis membrane processing device 20C, and the salt concentration that sees through water W40 as the mixing of the fresh water generated is back to benchmark.Thereby, provide and can reduce for generating the energy of fresh water, guarantee the seawater desalination system 1C of the fresh water water quality of generation simultaneously.
The invention is not restricted to above-mentioned embodiment, in the scope that does not depart from main points of the present invention, can do various changes.
The explanation of symbol
1A, 1B, 1C seawater desalination system
10A, water system reverse osmosis membrane processing device under 10C
20A, 20B, the 20C seawater is the reverse osmosis membrane processing device
100A, 100B, 100C control device
230 seawater systems see through water EC meter
Water under W10
Under W11, water system sees through water
Water system condensed water under W12
The W20 seawater
W21 seawater system sees through water
The W22 seawater is condensed water
Claims (according to the modification of the 19th of treaty)
1. seawater desalination system is characterized in that having:
Lower water is carried out to membrane separation, generate the lower water system reverse osmosis membrane processing device that lower water system sees through water and lower water system condensed water; And
Above-mentioned lower water system condensed water and the mixing water of the seawater of having fetched water are carried out to membrane separation, generating seawater system, to see through water be condensed water with seawater, has that to measure above-mentioned seawater system be the reverse osmosis membrane processing device through the seawater of the salt concentration determinator of the salt concentration of water;
According to the above-mentioned seawater of measuring with above-mentioned salt concentration determinator, being the salt concentration that sees through water, is to see through the above-mentioned lower water system reverse osmosis membrane processing device of water supply by above-mentioned seawater.
2. the seawater desalination system of putting down in writing according to claim 1, it is characterized in that having: see through the salt concentration of water according to the above-mentioned seawater system measured with above-mentioned salt concentration determinator, the control device that the driving that is the reverse osmosis membrane processing device by above-mentioned lower water system reverse osmosis membrane processing device and above-mentioned seawater is controlled.
3. the seawater desalination system of putting down in writing according to claim 2, it is characterized in that, above-mentioned control device is the salt concentration that sees through water according to the above-mentioned seawater of measuring with above-mentioned salt concentration determinator, by above-mentioned seawater, is to see through the above-mentioned lower water system reverse osmosis membrane processing device of water supply
Above-mentioned lower water system reverse osmosis membrane processing device, the above-mentioned seawater that will be the reverse osmosis membrane processing unit feeding from above-mentioned seawater is to see through water to carry out membrane separation with the mixing water of water.
4. the seawater desalination system of putting down in writing according to claim 1, it is characterized in that, above-mentioned seawater is the reverse osmosis membrane that the reverse osmosis membrane processing device has, and is following reverse osmosis membrane: according to the influx of the lower water that flows into above-mentioned lower water system reverse osmosis membrane processing device and salt concentration, the above-mentioned seawater of inflow, be that the influx of seawater of reverse osmosis membrane processing device and salt concentration, predefined above-mentioned seawater are that the seawater system that the reverse osmosis membrane processing device generates sees through the water yield of water and the reverse osmosis membrane that salt concentration is selected ratio of desalinization.
5. seawater desalination system is characterized in that having:
Lower water is carried out to membrane separation, generate lower water system reverse osmosis membrane processing device that lower water system sees through water and lower water system condensed water,
Seawater is carried out to membrane separation, generate seawater system see through water and seawater be the seawater of condensed water be the reverse osmosis membrane processing device,
Have and above-mentioned lower water system is seen through to water and above-mentioned seawater system see through the retention basin that mixing that water mixes stored through water and measure the mixing that stores in this retention basin retention system through the water level gauge of the water level of water;
Above-mentioned retention system, the water level of measuring according to above-mentioned water level gauge, starting or stopping above-mentioned seawater is the reverse osmosis membrane processing device.
6. according to the seawater desalination system of claim 6 record, it is characterized in that,
Above-mentioned retention system have the 1st salt concentration determinator measuring the mixing stored in above-mentioned retention basin and see through the salt concentration of water,
Above-mentioned lower water system reverse osmosis membrane processing device have the lower water system measure generated see through the salt concentration of water the 2nd salt concentration determinator,
Above-mentioned seawater be the reverse osmosis membrane processing device have the seawater system measure generated see through the salt concentration of water the 3rd salt concentration determinator,
According to above-mentioned seawater, be that the salt concentration that sees through water, above-mentioned lower water system see through the salt concentration of water and the salt concentration that above-mentioned mixing sees through water, starting or stopping above-mentioned seawater is the reverse osmosis membrane processing device.
7. method for desalting seawater is characterized in that having:
Lower water is carried out to membrane separation, generate lower water system reverse osmosis membrane processing operation that lower water system sees through water and lower water system condensed water,
Above-mentioned lower water system condensed water and the mixing water of the seawater of having fetched water are carried out to membrane separation, generate seawater system see through water and seawater be the seawater of condensed water be the reverse osmosis membrane processing operation,
Measure salt concentration that above-mentioned seawater system sees through the salt concentration of water measure operation and
According to above-mentioned seawater, be the salt concentration that sees through water, making above-mentioned seawater is to see through water to be back to the seawater system of above-mentioned lower water system reverse osmosis membrane processing operation through the water cycle operation.
8. according to the method for desalting seawater of claim 8 record, it is characterized in that having:
Be the salt concentration that sees through water according to above-mentioned seawater, determine that above-mentioned lower water system reverse osmosis membrane processing operation and above-mentioned seawater are that the continuation that the reverse osmosis membrane processing operation continues determines operation.
9. according to the method for desalting seawater of claim 8 record, it is characterized in that having:
According to above-mentioned seawater, be the salt concentration that sees through water, making above-mentioned seawater is to see through water to be back to the seawater system of above-mentioned lower water system reverse osmosis membrane processing operation through the water cycle operation; And
Above-mentioned lower water system reverse osmosis membrane processing operation is to be that the mixing water that sees through water and lower water carries out membrane separation through the above-mentioned seawater returned in the water cycle operation by above-mentioned seawater.
10. method for desalting seawater is characterized in that having:
Lower water is carried out to membrane separation, generate lower water system reverse osmosis membrane processing operation that lower water system sees through water and lower water system condensed water,
Seawater is carried out to membrane separation, generate seawater system see through water and seawater be the seawater of condensed water be the reverse osmosis membrane processing operation,
Above-mentioned lower water system is seen through to water and above-mentioned seawater system see through that mixing that water mixes stores in retention basin through water store operation,
Measure in above-mentioned retention basin the water level that the mixing stored sees through water the level measuring operation and
According to the water level of measuring by above-mentioned level measuring operation, determine whether to carry out the decision operation that above-mentioned seawater is the reverse osmosis membrane processing operation.
11. the method for desalting seawater according to claim 10 record is characterized in that having:
Measure the 1st salt concentration that the mixing that stores in above-mentioned retention basin sees through the salt concentration of water measure operation,
Measure the 2nd salt concentration that the lower water system that generates in above-mentioned lower water system reverse osmosis membrane processing operation sees through the salt concentration of water measure operation and
Measuring above-mentioned seawater is that the seawater system generated in the reverse osmosis membrane processing operation measures operation through the 3rd salt concentration of the salt concentration of water;
Above-mentioned decision operation, be that the salt concentration that sees through water, above-mentioned lower water system see through the salt concentration of water and the salt concentration that above-mentioned mixing sees through water according to above-mentioned seawater, determines that whether carrying out above-mentioned seawater is the reverse osmosis membrane processing operation.

Claims (13)

1. seawater desalination system is characterized in that having:
Lower water is carried out to membrane separation, generate the lower water system reverse osmosis membrane processing device that lower water system sees through water and lower water system condensed water; And
Above-mentioned lower water system condensed water and the mixing water of the seawater of having fetched water are carried out to membrane separation, and generating seawater system, to see through water be condensed water with seawater, has and measure the salt concentration determinator of above-mentioned seawater system through the salt concentration of water;
According to the above-mentioned seawater of measuring with above-mentioned salt concentration determinator, being the salt concentration that sees through water, is to see through the above-mentioned lower water system reverse osmosis membrane processing device of water supply by above-mentioned seawater.
2. seawater desalination system, it has: Jiang Xiashui carries out membrane separation, generates the lower water system reverse osmosis membrane processing device that lower water system sees through water and lower water system condensed water, it is characterized in that having:
Above-mentioned lower water system condensed water and the mixing water of the seawater of having fetched water are carried out to membrane separation, generating seawater system, to see through water be condensed water with seawater, have measure above-mentioned seawater system through the seawater of the salt concentration determinator of the salt concentration of water be the reverse osmosis membrane processing device and
According to the above-mentioned seawater of measuring with above-mentioned salt concentration determinator, be the salt concentration that sees through water, controlling above-mentioned lower water system reverse osmosis membrane processing device and above-mentioned seawater is the control device that the reverse osmosis membrane processing device drives.
3. according to the seawater desalination system of claim 2 record, it is characterized in that also having: it is the reverse osmosis membrane processing device that above-mentioned seawater system is seen through to the 2nd seawater that water carries out membrane separation,
Above-mentioned control device, be the salt concentration that sees through water according to the above-mentioned seawater of measuring with above-mentioned salt concentration determinator, by above-mentioned seawater, is to be the reverse osmosis membrane processing device through above-mentioned the 2nd the seawater of water supply.
4. according to the seawater desalination system of claim 2 record, it is characterized in that, the seawater system that above-mentioned control device is measured according to above-mentioned salt concentration determinator sees through the salt concentration of water, by above-mentioned seawater, is to see through the above-mentioned lower water system reverse osmosis membrane processing device of water supply,
Above-mentioned lower water system reverse osmosis membrane processing device, the above-mentioned seawater that will be the reverse osmosis membrane processing unit feeding from above-mentioned seawater is to see through water to carry out membrane separation with the mixing water of water.
5. the seawater desalination system to any one record of claim 4 according to claim 2, is characterized in that,
Above-mentioned seawater is that the reverse osmosis membrane that the reverse osmosis membrane processing device has is following reverse osmosis membrane: be that the influx of seawater of reverse osmosis membrane processing device and salt concentration, predefined above-mentioned seawater are the water yield and the salt concentration that seawater system that the reverse osmosis membrane processing device generates sees through water according to the influx of the lower water that flows into above-mentioned lower water system reverse osmosis membrane processing device and salt concentration, the above-mentioned seawater of inflow, select the reverse osmosis membrane with good ratio of desalinization.
6. seawater desalination system is characterized in that having:
Lower water is carried out to membrane separation, generate lower water system reverse osmosis membrane processing device that lower water system sees through water and lower water system condensed water,
Seawater is carried out to membrane separation, generate seawater system see through water and seawater be the seawater of condensed water be the reverse osmosis membrane processing device and
Have and above-mentioned lower water system is seen through to water and above-mentioned seawater system see through mixing that water mixed and see through the retention basin that water stored and measure the mixing that stores in this retention basin retention system through the water level gauge of the water level of water;
The water level that above-mentioned retention system is measured according to above-mentioned water level gauge, starting or stopping above-mentioned seawater is the reverse osmosis membrane processing device.
7. according to the seawater desalination system of claim 6 record, it is characterized in that,
Above-mentioned retention system has measures the 1st salt concentration determinator that the mixing stored in above-mentioned retention basin sees through the salt concentration of water,
Above-mentioned lower water system reverse osmosis membrane processing device has measures the 2nd salt concentration determinator that the lower water system generated sees through the salt concentration of water,
Above-mentioned seawater is the reverse osmosis membrane processing device, there is the lower water system measure generated and see through the 3rd salt concentration determinator of the salt concentration of water, see through according to above-mentioned seawater system that the salt concentration of water, above-mentioned lower water system see through the salt concentration of water and salt concentration that above-mentioned mixing sees through water is started or stops.
8. method for desalting seawater is characterized in that having:
Lower water is carried out to membrane separation, generate lower water system reverse osmosis membrane processing operation that lower water system sees through water and lower water system condensed water,
Above-mentioned lower water system condensed water and the mixing water of the seawater of having fetched water are carried out to membrane separation, generate seawater system see through water and seawater be the seawater of condensed water be the reverse osmosis membrane processing operation,
Measure salt concentration that above-mentioned seawater system sees through the water salt concentration measure operation and
According to above-mentioned seawater, be the salt concentration that sees through water, making above-mentioned seawater is to see through water to be back to the seawater system of above-mentioned lower water system reverse osmosis membrane processing operation through the water cycle operation.
9. method for desalting seawater, the method is to have Jiang Xiashui to carry out membrane separation, generates the method for desalting seawater that lower water system sees through the lower water system reverse osmosis membrane processing operation of water and lower water system condensed water, it is characterized in that having:
Above-mentioned lower water system condensed water and the mixing water of the seawater of having fetched water are carried out to membrane separation, generate seawater system see through water and seawater be the seawater of condensed water be the reverse osmosis membrane processing operation,
Measure salt concentration that above-mentioned seawater system sees through the salt concentration of water measure operation and
Be the salt concentration that sees through water according to above-mentioned seawater, determine that above-mentioned lower water system reverse osmosis membrane processing operation and above-mentioned seawater are that the continuation that the reverse osmosis membrane processing operation continues determines operation.
10. according to the method for desalting seawater of claim 9 record, it is characterized in that also having:
It is the reverse osmosis membrane processing operation that above-mentioned seawater system is seen through to the 2nd seawater that water carries out membrane separation;
The above-mentioned seawater of measuring according to above-mentioned salt concentration mensuration operation is the salt concentration that sees through water, by above-mentioned seawater, is with above-mentioned the 2nd seawater, to be that the reverse osmosis membrane processing operation is processed through water.
11. the method for desalting seawater according to claim 9 record is characterized in that having:
The seawater of measuring according to above-mentioned salt concentration mensuration operation is the salt concentration that sees through water, and making above-mentioned seawater is to be back to the seawater system of above-mentioned lower water system reverse osmosis membrane processing operation through the water cycle operation through water; And
Above-mentioned lower water system reverse osmosis membrane processing operation will be that the above-mentioned seawater returned through the water cycle operation is that the mixing water that sees through water and lower water carries out membrane separation at above-mentioned seawater.
12. method for desalting seawater is characterized in that having:
Lower water is carried out to membrane separation, generate lower water system reverse osmosis membrane processing operation that lower water system sees through water and lower water system condensed water,
Seawater is carried out to membrane separation, generate seawater system see through water and seawater be the seawater of condensed water be the reverse osmosis membrane processing operation,
Above-mentioned lower water system is seen through to water and above-mentioned seawater system see through that mixing that water mixed stores in retention basin through water store operation,
Measure in this retention basin the water level that the mixing stored sees through water the level measuring operation and
According to the water level of measuring by above-mentioned level measuring operation, determine whether to carry out the decision operation that above-mentioned seawater is the reverse osmosis membrane processing operation.
13. the method for desalting seawater according to claim 12 record is characterized in that also having:
Measure the 1st salt concentration that the mixing that stores in above-mentioned retention basin sees through the salt concentration of water measure operation,
Measure the 2nd salt concentration that the lower water system that generates in above-mentioned lower water system reverse osmosis membrane processing operation sees through the salt concentration of water measure operation and
Measuring above-mentioned seawater is that the seawater system generated in the reverse osmosis membrane processing operation measures operation through the 3rd salt concentration of the salt concentration of water;
Above-mentioned decision operation is that the salt concentration that sees through water, above-mentioned lower water system see through the salt concentration of water and the salt concentration that above-mentioned mixing sees through water according to above-mentioned seawater, determines that whether carrying out above-mentioned seawater is the reverse osmosis membrane processing operation.
CN2012800095918A 2011-02-21 2012-02-21 Seawater desalination system and seawater desalination method Pending CN103443031A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2011035018A JP5933926B2 (en) 2011-02-21 2011-02-21 Seawater desalination system and seawater desalination method
JP2011-035018 2011-02-21
PCT/JP2012/054160 WO2012115114A1 (en) 2011-02-21 2012-02-21 Seawater desalination system and seawater desalination method

Publications (1)

Publication Number Publication Date
CN103443031A true CN103443031A (en) 2013-12-11

Family

ID=46720891

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012800095918A Pending CN103443031A (en) 2011-02-21 2012-02-21 Seawater desalination system and seawater desalination method

Country Status (4)

Country Link
JP (1) JP5933926B2 (en)
CN (1) CN103443031A (en)
SG (1) SG192894A1 (en)
WO (1) WO2012115114A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG11201509720TA (en) * 2013-05-27 2015-12-30 Toray Industries Operation method for water treatment device
JP6169009B2 (en) * 2014-01-29 2017-07-26 株式会社ウェルシィ Reverse osmosis membrane device and operating method thereof
CN104102198B (en) * 2014-07-04 2018-09-07 中广核工程有限公司 A kind of PX energy recycle devices fault monitoring system and method
JP6658199B2 (en) * 2016-03-28 2020-03-04 東洋紡株式会社 Fresh water system
WO2019180788A1 (en) * 2018-03-19 2019-09-26 三菱重工エンジニアリング株式会社 Salt concentration device and scale detection method for salt concentration device
KR102370466B1 (en) * 2020-09-02 2022-03-04 국민대학교 산학협력단 Automatic operation method of seawater desalination device for seawater desalination vessel
KR102655426B1 (en) * 2021-12-27 2024-04-09 국민대학교 산학협력단 Automatic operation method of ship-mounted seawater desalination device
US11502323B1 (en) 2022-05-09 2022-11-15 Rahul S Nana Reverse electrodialysis cell and methods of use thereof
US11502322B1 (en) 2022-05-09 2022-11-15 Rahul S Nana Reverse electrodialysis cell with heat pump
KR102565078B1 (en) * 2022-09-28 2023-08-10 지오릿에너지(주) Water Treatment System with Thermal Energy Utilization Method of Purified Water Purified by Reverse Osmosis
KR102565087B1 (en) * 2022-09-28 2023-08-10 지오릿에너지(주) Reverse Osmosis Purification Water Treatment System Using Purified Water Bypass Piping
KR102565081B1 (en) * 2022-09-28 2023-08-10 지오릿에너지(주) Reverse Osmosis Purification Water Treatment System Using Raw Water Bypass Piping
KR102505557B1 (en) * 2022-09-28 2023-03-06 지엔원에너지(주) Water Treatment System with Thermal Energy Utilization Method Of Treated Water Treated By Sequencing Batch Reactor
US11855324B1 (en) 2022-11-15 2023-12-26 Rahul S. Nana Reverse electrodialysis or pressure-retarded osmosis cell with heat pump

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63197596A (en) * 1987-02-12 1988-08-16 Mitsubishi Heavy Ind Ltd Method for controlling quality of made water of water making plant
JPH10296060A (en) * 1997-04-25 1998-11-10 Japan Organo Co Ltd Prevention method for contamination of separation membrane
CN1507417A (en) * 2002-01-22 2004-06-23 ������������ʽ���� Water treatment method and water treatment equipment
JP2005144301A (en) * 2003-11-13 2005-06-09 Mitsubishi Heavy Ind Ltd Desalting apparatus and desalting method
EP2008703A1 (en) * 2001-03-14 2008-12-31 Ludwig Michelbach Reverse osmosis plant
JP2009148660A (en) * 2007-12-19 2009-07-09 Miura Co Ltd Water treatment system
JP2009279472A (en) * 2008-05-19 2009-12-03 Miura Co Ltd Reverse osmosis membrane device
WO2010052651A1 (en) * 2008-11-04 2010-05-14 Swiss Fresh Water Sa System for saving energy by recycling concentrate
JP4499835B1 (en) * 2009-02-14 2010-07-07 株式会社神鋼環境ソリューション Fresh water generating apparatus and fresh water generating method
CN101801857A (en) * 2007-10-29 2010-08-11 株式会社神钢环境舒立净 Water treatment method, water treatment apparatus, method for recovering purified water, and purified water recovering apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59228988A (en) * 1983-06-10 1984-12-22 Jgc Corp Method for obtaining pure water from high-conductivity water by reverse osmosis method
JPS60235605A (en) * 1984-05-08 1985-11-22 Kurita Water Ind Ltd Reverse osmotic membrane separation apparatus
JP2008307487A (en) * 2007-06-15 2008-12-25 Mitsubishi Heavy Ind Ltd Desalting device
JP5222526B2 (en) * 2007-10-29 2013-06-26 株式会社神鋼環境ソリューション Water treatment method and water treatment apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63197596A (en) * 1987-02-12 1988-08-16 Mitsubishi Heavy Ind Ltd Method for controlling quality of made water of water making plant
JPH10296060A (en) * 1997-04-25 1998-11-10 Japan Organo Co Ltd Prevention method for contamination of separation membrane
EP2008703A1 (en) * 2001-03-14 2008-12-31 Ludwig Michelbach Reverse osmosis plant
CN1507417A (en) * 2002-01-22 2004-06-23 ������������ʽ���� Water treatment method and water treatment equipment
JP2005144301A (en) * 2003-11-13 2005-06-09 Mitsubishi Heavy Ind Ltd Desalting apparatus and desalting method
CN101801857A (en) * 2007-10-29 2010-08-11 株式会社神钢环境舒立净 Water treatment method, water treatment apparatus, method for recovering purified water, and purified water recovering apparatus
JP2009148660A (en) * 2007-12-19 2009-07-09 Miura Co Ltd Water treatment system
JP2009279472A (en) * 2008-05-19 2009-12-03 Miura Co Ltd Reverse osmosis membrane device
WO2010052651A1 (en) * 2008-11-04 2010-05-14 Swiss Fresh Water Sa System for saving energy by recycling concentrate
JP4499835B1 (en) * 2009-02-14 2010-07-07 株式会社神鋼環境ソリューション Fresh water generating apparatus and fresh water generating method

Also Published As

Publication number Publication date
SG192894A1 (en) 2013-09-30
JP2012170880A (en) 2012-09-10
WO2012115114A1 (en) 2012-08-30
JP5933926B2 (en) 2016-06-15

Similar Documents

Publication Publication Date Title
CN103443031A (en) Seawater desalination system and seawater desalination method
CN102985373B (en) Fresh water producing apparatus and method for operating same
KR100963536B1 (en) Method of generating fresh water and fresh-water generator
CN102471100B (en) Water producing system
Song et al. Evaluation of scaling potential in a pilot-scale NF–SWRO integrated seawater desalination system
JP2009047012A (en) Osmotic pressure power generation system
JP6070345B2 (en) Reverse osmosis membrane separator
KR101489855B1 (en) Desalination system capable of recovering osmotic energy and method thereof
JP5606615B1 (en) Membrane separator, circulating water utilization system
Ning et al. Seawater RO treatment of RO concentrate to extreme silica concentrations
Pervov et al. Membrane technologies in the solution of environmental problems
US9868659B2 (en) Subsurface water purification method
JPWO2015045574A1 (en) Desalination apparatus and desalination method
JP2015116538A (en) Device and method of scale detection in concentrator and reproduction treatment system of water
CN202754858U (en) Water filter device
FI125583B (en) Process for arranging fluid circulation in membrane filtration and membrane filtration equipment
KR102065275B1 (en) Desalination apparatus and method for desalinizing using the same
CN2910907Y (en) Water treatment equipment able to recover total concentration water
JP2014108381A (en) Pure water producing apparatus and pure water producing method
Kim et al. Fundamentals and application of reverse osmosis membrane processes
CN105461116A (en) Desalting treatment device for seawater
JP2013252502A (en) Device for desalination of salt water and water producing method
CN205442865U (en) Seawater desalination&#39;s treatment facility
CN220078717U (en) Ultra-filtration series-parallel nanofiltration and reverse osmosis membrane integrated separation test device
KR102082789B1 (en) Fresh water generating system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
AD01 Patent right deemed abandoned
AD01 Patent right deemed abandoned

Effective date of abandoning: 20170329