CN102442715A - Pressure delay osmosis/reverse osmosis combined desalination method - Google Patents
Pressure delay osmosis/reverse osmosis combined desalination method Download PDFInfo
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- CN102442715A CN102442715A CN2011103460592A CN201110346059A CN102442715A CN 102442715 A CN102442715 A CN 102442715A CN 2011103460592 A CN2011103460592 A CN 2011103460592A CN 201110346059 A CN201110346059 A CN 201110346059A CN 102442715 A CN102442715 A CN 102442715A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a pressure delay osmosis/reverse osmosis combined desalination method, which comprises the following steps of: pressurizing pretreated sewage flow U, successively inputting into first and second pressure delay osmosis devices; pressurizing pretreated seawater flow A, entering into the first pressure delay osmosis device, outputting three flows D, E and F, inputting the flow D into a first energy recovery device for energy absorption, inputting into a first booster pump for supercharging, inputting the flow E into a second booster pump for supercharging, inputting the flow F into a second energy recovery device for energy absorption, inputting into a third booster pump for supercharging, merging the three flows, inputting into a high-pressure membrane module, outputting a strong brine flow P from the membrane module, inputting the flow P into the second energy recovery device to release energy, inputting into a fourth booster pump for supercharging, inputting into the second pressure delay osmosis device, inputting into the first energy recovery device to release energy, outputting product water out from the membrane module, and processing the product water for usage. The method provided by the invention is used to raise energy utilization rate, decrease energy consumption, save desalination cost and reduce discharge load of the strong brine.
Description
Technical field
The invention belongs to the desalination field, relate to a kind of pressure retarded osmosis/r-o-built-up type desalting method particularly.
Background technology
Growing water demand, gradually the climate arid of normality and the critical shortage that the water surrounding that continues to worsen has caused Freshwater resources are developed unconventional water source, just are being placed on by countries in the world that critical role is studied and paid all practices.Along with developing rapidly of China's economic society, the utilization at unconventional water source has received the extensive concern of various circles of society.For coastal cities and area, island, the development and use at unconventional water source mainly comprise sea water desaltination, reusing sewage and rainwater utilization three aspects.Because climate ANOMALOUS VARIATIONS has in various degree all appearred in a lot of areas, the world in recent years, causes local quantity of precipitation significantly to descend, rainwater utilization is restricted, and thus, sea water desaltination and reusing sewage become the most feasible, also are the most reliable sustainable water increment methods.
The area of earth surface 70.8% is awash, and wherein 97.5% water resources is the seawater that can't directly drink, and therefore obtaining Freshwater resources through the method that desalinizes seawater is a kind of strategic choices.At present, sea water desaltination has worldwide obtained widespread use, and large quantities of sea water desaltination engineerings have all been built in a lot of maritime nations and area in succession.Recent statistics according to international desalination association (IDA): whole world desalination installed capacity in the past in 5 years with 12% speed increment every year on average, whole world desalination in the end of the year 2010 is produced the water scale and has been reached 65 * 10
6m
3/ d analyzes based on various countries' official statistics and water supply/demand, produces water to whole world desalination in 2015 and will reach 98 * 10
6m
3/ d.
Method for desalting seawater has a variety of, business-likely now mainly contains following three kinds of desalination technologies: r-o-, multi-effect distilling and MSF.Though sea water desaltination has different processes available; But sea water desaltination is a kind of " energy intensive commercial run " in essence; The desalination process need consumes mass energy, and the sea water desaltination engineering of having moved is confined to the area that the energy is relatively cheap or reserves are more abundant more.Therefore, in order to promote the Sustainable development of sea water desaltination, need find out the solution of further reduction sea water desaltination energy consumption and cost.In addition; Desalting process can produce a large amount of strong brines; The direct discharge into sea of strong brine not only can be caused disadvantageous effect to ocean environment; Also can cause the waste of resource, how weaken or eliminate strong brine to the influence of environment and it is rationally utilized also is one of direction of paying close attention to from now on of sea water desaltination in addition.
Reusing sewage refers to the treated facility deep purifying of municipal effluent and handles, and reaches the process of recycling after the specific water water quality standard.The reusing sewage branch is drunk type water reuse and non-and is drunk two kinds of type water reuses.Non-ly drink the reuse of type water and be widely accepted at present, drink the reuse of type water also in the approval that progressively obtains the public, and can be more widely used in foreseeable future.
In the membrane separation technique field, r-o-, just permeate and pressure retarded osmosis all is based on the membrane process that semi-permeable membranes is selected the perviousness principle.Water molecules is diffused into the low side of water chemistry gesture from the high side of selective permeation film water partial potential in the positive process of osmosis; Reverse osmosis process as impellent, utilizes the selective permeation film that solvent is separated with other component in the solution with the pressure that is higher than osmotic pressure; It is the pilot process that is just permeating with r-o-that pressure delays to permeate; Hydraulic pressure acts on the opposite direction of osmotic pressure gradient; Because there is the salt concn gradient in the film both sides, the net flux of water remains to the liquid concentrator direction, can permeate the considerable energy that current carry through turbine power generation or other approach utilization.
The research to r-o-both at home and abroad is started in the sixties in last century, because reverse osmosis technology has no phase transformation, modularization, flow process is simple, easy to operate, floor space is little, reduced investment, low power consumption and other advantages, development is very rapid.At present, reverse osmosis desalination technology has been obtained a large amount of practical applications.Yet still there are many obstacles in the continuation progress of reverse osmosis desalination technology, and the reverse osmosis system energy consumption is still waiting to reduce, and the system water recovery also has much room for improvement, and this is that it makes the high for a long time major cause of water cost.
Research to pressure retarded osmosis in the world wide is started in the seventies in last century; The main Application Research direction of pressure retarded osmosis is the infiltration generating, and in the pressure retarded osmosis process, fresh water is along a side flow of film; Pressurization one side that under the effect of osmotic pressure, is penetrated into film is mixed with salt water; Diluted salt water is divided into two fluid streams, and a part produces electric energy through driving turbo, and another part is through the salt water pressurization of pressure exchanger for flowing into.
Summary of the invention
The objective of the invention is to propose a kind of pressure retarded osmosis/r-o-built-up type desalting method.
Technical scheme of the present invention is summarized as follows:
A kind of pressure retarded osmosis/r-o-built-up type desalting method comprises the steps:
Sewage pretreater 13 pretreated sewage current U be will pass through and after 14 pressurizations of sewage working shaft, W, two strands of current of X will be divided into; After current W imported the first pressure retarded osmosis device 3 and carries out process operation, liquid concentrator was discharged system as current Y; After current X imported the second pressure retarded osmosis device 11 and carries out process operation, liquid concentrator was discharged system as current Z; Add through seawater working shaft 2 through sea water preprocessing device 1 pretreated seawater current A and to be pressed into current B, carry out process operation through the said first pressure retarded osmosis device 3 again after, output D, E, three strands of current of F; Current D input earlier first energy recycle device 4 absorbs energy, imports 5 superchargings of first topping-up pump again and becomes High-Pressure Water H; Current E imports 6 superchargings of second topping-up pump and becomes High-Pressure Water J; Current F input earlier second energy recycle device 7 absorbs energy, imports 8 superchargings of the 3rd topping-up pump again and becomes High-Pressure Water L; Input high-pressure membrane assembly 9 carried out membrane sepn after H, J and three strands of current of L merged into current M; The high-pressure thick brine stream P of said high-pressure membrane assembly 9 outputs imports said second energy recycle device 7 and releases energy, and imports 10 superchargings of the 4th topping-up pump again and becomes current R; After said current R imports the said second pressure retarded osmosis device 11 and carries out process operation, import said first energy recycle device 4 again and release energy, lean liquor is discharged system as current T; The product current N of said high-pressure membrane assembly output supplies to use after preprocessor 12 is handled.
Described high-pressure membrane assembly is reverse osmosis membrane assembly or nanofiltration membrane component.
Advantage of the present invention:
The present invention has taken all factors into consideration the water recovery, energy consumption, cost, water quality, environmental influence and working service etc. and has used key element; By two pressure retarded osmosis devices; Utilize the first pressure retarded osmosis device to purify, reclaim sewage on the one hand, seawater is diluted, and this newly-increased water yield is carried out supercharging; Improved impervious desalination system the water recovery, reduced system energy consumption, ensured desalination water water quality; Flow R and freshet X with reverse osmosis concentrated salt solution and sewage as salt water respectively on the other hand; Utilize the osmotic energy of the second pressure retarded osmosis device; And through first energy recycle device reverse osmosis feedwater of directly pressurizeing; Improved energy utilization efficiency, reduced system energy consumption, practiced thrift desalinating cost, cut down the strong brine discharge load.In addition, the desalting method that the present invention relates to also has modularization, is prone to advantages such as amplification, flexible operation and floor space are little.
Description of drawings
Fig. 1 is a kind of pressure retarded osmosis of the present invention/r-o-built-up type desalting method synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
A kind of pressure retarded osmosis/r-o-built-up type desalting method comprises the steps:
The sewage current U that 13 pre-treatment of sewage pretreater remove pollutents such as suspended substance, mikrobe and colloidal solid wherein be will pass through and after 14 pressurizations of sewage working shaft, W, two strands of current of X will be divided into; After current W imports the first pressure retarded osmosis device 3 and carries out process operation; Sewage relies on osmosis through forward osmosis membrane entering seawater side seawater to be diluted; And utilize the osmotic pressure between seawater and sewage to accomplish to seeing through the pressurization of liquid; The sewage liquid concentrator is discharged system as current Y, and saltiness and system that this step can reduce reverse osmosis feedwater give water consumption; After current X imports the second pressure retarded osmosis device 11 and carries out process operation; Sewage relies on osmosis to see through forward osmosis membrane and gets into the strong brine side; And utilize the osmotic pressure between strong brine and sewage to accomplish to seeing through the pressurization of liquid; The sewage liquid concentrator is discharged system as current Z, and this step can make the second pressure retarded osmosis device, 11 salt water exit end discharge and carry the current of significant amount of energy; To pass through 1 pre-treatment of sea water preprocessing device removes the seawater current A of impurity such as suspended substance, algae and organism wherein and adds through seawater working shaft 2 and be pressed into current B; After carrying out process operation through the first pressure retarded osmosis device 3 again, output D, E, three strands of current of F; Current D input earlier first energy recycle device 4 absorbs energy and accomplishes preliminary supercharging, imports first topping-up pump 5 again and carries out secondary booster and become High-Pressure Water H to reach the requirement of high-pressure membrane assembly intake pressure; Current E imports 6 superchargings of second topping-up pump and becomes High-Pressure Water J to reach the requirement of high-pressure membrane assembly intake pressure; Current F input earlier second energy recycle device 7 absorbs energy and accomplishes preliminary supercharging, imports the 3rd topping-up pump 8 again and carries out secondary booster and become High-Pressure Water L to reach the requirement of high-pressure membrane assembly intake pressure; Input high-pressure membrane assembly 9 carried out membrane sepn after H, J and three strands of current of L merged into current M; The high-pressure thick brine stream P of high-pressure membrane assembly 9 outputs imports second energy recycle device 7 as high-pressure thick water and releases energy transmission ofenergy feedwater flow F, and the low-press thick salt solution that second energy recycle device 7 is discharged becomes current R through 10 superchargings of the 4th topping-up pump; The current R input second pressure retarded osmosis device 11 earlier carries out process operation, imports first energy recycle device 4 again and releases energy transmission ofenergy feedwater flow D, and lean liquor is discharged system as current T; The product current N of high-pressure membrane assembly output supplies to use after preprocessor 12 aftertreatments.
The high-pressure membrane assembly is reverse osmosis membrane assembly or nanofiltration membrane component.
One aspect of the present invention is utilized the pressure retarded osmosis device to purify, is reclaimed sewage, seawater is diluted, and this newly-increased water yield is carried out supercharging; On the other hand respectively with reverse osmosis concentrated salt solution and sewage as salt water source and freshwater source; Utilize the osmotic energy of pressure retarded osmosis process; And by the energy recycle device reverse osmosis feedwater of directly pressurizeing; Thereby improved the recovery and the energy utilization efficiency of impervious desalination system, reduced system energy consumption, practiced thrift desalinating cost, cut down the strong brine discharge load, ensured desalination water water quality.
Claims (2)
1. pressure retarded osmosis/r-o-built-up type desalting method is characterized in that comprising the steps:
Sewage pretreater 13 pretreated sewage current U be will pass through and after 14 pressurizations of sewage working shaft, W, two strands of current of X will be divided into; After current W imported the first pressure retarded osmosis device 3 and carries out process operation, liquid concentrator was discharged system as current Y; After current X imported the second pressure retarded osmosis device 11 and carries out process operation, liquid concentrator was discharged system as current Z; Add through seawater working shaft 2 through sea water preprocessing device 1 pretreated seawater current A and to be pressed into current B, carry out process operation through the said first pressure retarded osmosis device 3 again after, output D, E, three strands of current of F; Current D input earlier first energy recycle device 4 absorbs energy, imports 5 superchargings of first topping-up pump again and becomes High-Pressure Water H; Current E imports 6 superchargings of second topping-up pump and becomes High-Pressure Water J; Current F input earlier second energy recycle device 7 absorbs energy, imports 8 superchargings of the 3rd topping-up pump again and becomes High-Pressure Water L; Input high-pressure membrane assembly 9 carried out membrane sepn after H, J and three strands of current of L merged into current M; The high-pressure thick brine stream P of said high-pressure membrane assembly 9 outputs imports said second energy recycle device 7 and releases energy, and imports 10 superchargings of the 4th topping-up pump again and becomes current R; After said current R imports the said second pressure retarded osmosis device 11 and carries out process operation, import said first energy recycle device 4 again and release energy, lean liquor is discharged system as current T; The product current N of said high-pressure membrane assembly output supplies to use after preprocessor 12 is handled.
2. a kind of pressure retarded osmosis according to claim 1/r-o-built-up type desalting method is characterized in that described high-pressure membrane assembly is reverse osmosis membrane assembly or nanofiltration membrane component.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2960212A4 (en) * | 2013-02-22 | 2016-10-05 | Gs Engineering&Construction Corp | Desalination device based on membrane in which osmotic energy recovery is possible and method |
| CN106082397A (en) * | 2016-06-12 | 2016-11-09 | 东华大学 | A kind of system and method synchronizing regeneration effluent and desalinization |
| CN106379961A (en) * | 2016-10-26 | 2017-02-08 | 陈志强 | Multi-section reverse-osmosis seawater desalination and saline water potential difference energy power generation coupling system |
| CN108473342A (en) * | 2015-09-02 | 2018-08-31 | 伊莱克特罗弗公司 | System for purifying liquid |
| CN109095561A (en) * | 2017-06-21 | 2018-12-28 | 北京天诚同创电气有限公司 | Reverse osmosis seawater desalting method and system |
| CN109475818A (en) * | 2016-06-06 | 2019-03-15 | 巴特尔纪念研究所 | The counter-infiltration system and method for multistage infiltration auxiliary |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003047733A1 (en) * | 2001-12-07 | 2003-06-12 | Statkraft Sf | Hydrophile semipermeable membrane |
| CN2677366Y (en) * | 2003-12-12 | 2005-02-09 | 国家海洋局天津海水淡化与综合利用研究所 | Medium and small size integrated reverse asmosis sea water desalination device |
| WO2007134226A1 (en) * | 2006-05-12 | 2007-11-22 | Energy Recovery, Inc. | Hybrid ro/pro system |
| CN101267875A (en) * | 2005-09-20 | 2008-09-17 | 水通道蛋白Aps公司 | Biomimetic water membrane comprising aquaporins used in the production of salinity power |
-
2011
- 2011-11-04 CN CN2011103460592A patent/CN102442715B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003047733A1 (en) * | 2001-12-07 | 2003-06-12 | Statkraft Sf | Hydrophile semipermeable membrane |
| CN2677366Y (en) * | 2003-12-12 | 2005-02-09 | 国家海洋局天津海水淡化与综合利用研究所 | Medium and small size integrated reverse asmosis sea water desalination device |
| CN101267875A (en) * | 2005-09-20 | 2008-09-17 | 水通道蛋白Aps公司 | Biomimetic water membrane comprising aquaporins used in the production of salinity power |
| WO2007134226A1 (en) * | 2006-05-12 | 2007-11-22 | Energy Recovery, Inc. | Hybrid ro/pro system |
Non-Patent Citations (2)
| Title |
|---|
| 《中国给水排水》 20081231 邹士洋 "新型膜分离技术-正向渗透及其应用" 第24卷, 第24期 * |
| 邹士洋: ""新型膜分离技术-正向渗透及其应用"", 《中国给水排水》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2960212A4 (en) * | 2013-02-22 | 2016-10-05 | Gs Engineering&Construction Corp | Desalination device based on membrane in which osmotic energy recovery is possible and method |
| CN108473342A (en) * | 2015-09-02 | 2018-08-31 | 伊莱克特罗弗公司 | System for purifying liquid |
| CN109475818A (en) * | 2016-06-06 | 2019-03-15 | 巴特尔纪念研究所 | The counter-infiltration system and method for multistage infiltration auxiliary |
| CN109475818B (en) * | 2016-06-06 | 2021-09-07 | 巴特尔纪念研究所 | Multi-stage permeate assisted reverse osmosis system and method |
| CN106082397A (en) * | 2016-06-12 | 2016-11-09 | 东华大学 | A kind of system and method synchronizing regeneration effluent and desalinization |
| CN106082397B (en) * | 2016-06-12 | 2021-04-20 | 东华大学 | System and method for synchronous sewage regeneration and seawater desalination |
| CN106379961A (en) * | 2016-10-26 | 2017-02-08 | 陈志强 | Multi-section reverse-osmosis seawater desalination and saline water potential difference energy power generation coupling system |
| CN109095561A (en) * | 2017-06-21 | 2018-12-28 | 北京天诚同创电气有限公司 | Reverse osmosis seawater desalting method and system |
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