CN104163470A - Concentrated water energy gradient utilization reverse osmosis seawater desalination method - Google Patents
Concentrated water energy gradient utilization reverse osmosis seawater desalination method Download PDFInfo
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- CN104163470A CN104163470A CN201310488172.3A CN201310488172A CN104163470A CN 104163470 A CN104163470 A CN 104163470A CN 201310488172 A CN201310488172 A CN 201310488172A CN 104163470 A CN104163470 A CN 104163470A
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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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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The invention discloses a concentrated water energy gradient utilization reverse osmosis seawater desalination method. The method comprises the following steps: pressurizing sea water, shunting the pressurized sea water into a stream C, a stream D and a stream E, pressurizing the stream C, and inputting the pressurized stream C into a reverse osmosis membrane assembly for desalination and separation to form a high-pressure concentrated water stream K and a water producing stream H; inputting the stream D and the high-pressure concentrated water stream K into an isostatic-pressure energy exchanger respectively for energy conversion, and outputting a high-pressure water stream L and a low-pressure water stream N; introducing the low-pressure water stream N into a buffering pond; and leading a stream P out of the buffering pond, pressurizing the stream P, inputting the pressurized stream P and the stream E into a reduced-pressure reverse osmosis device respectively to convert the concentration difference of the concentrated water into hydraulic energy, outputting a stream T and a stream R which are drained into the sea from the reduced-pressure reverse osmosis device, inputting the stream R and the high-pressure water stream L into a turbine energy exchanger respectively for energy conversion, outputting a secondary boosted water stream M and a stream S, inputting the secondary boosted water stream M into the reverse osmosis membrane assembly, and draining the stream S into the sea. Through adoption of the concentrated water energy gradient utilization reverse osmosis seawater desalination method, the seawater desalination carbon emission and the concentrated water discharge load are lowered, and an energy-saving, low-carbon and environment-friendly technology is realized.
Description
Technical field
The invention belongs to sea water desaltination field, relate to particularly a kind of dense water cascaded utilization of energy reverse osmosis seawater desalting method.
Background technology
The mankind are faced with serious Freshwater resources problem in short supply in 21 century.Sea water desaltination, as the effective way that solves Freshwater resources crisis, has obtained the generally approval of countries in the world.Reverse-osmosis Seawater Desalination Technology, because it has without phase transformation, the advantage such as energy consumption is low, simple to operate, easy to maintenance, the construction period is short, has started to obtain at present increasingly extensive application.But, the Social Acceptability of reverse osmosis seawater desalting or on the low side, reason is that reverse osmosis seawater desalting still exists some development obstacles at aspects such as energy consumption, cost, environmental influences, do not meet the demand of wider scope water object, need to improve a lot of local continuation such as Revere Osmosis Process System designs.
Reverse osmosis technology belongs to pressure-actuated membrane separation technique, and the semipermeable partition adopting in its lock out operation is organically separated fresh water and salt solution.Because concentration difference has osmotic pressure, while only having the working pressure of charging seawater to be greater than the osmotic pressure of seawater, just can make fresh water in seawater by semi-permeable membranes and separated in semipermeable partition both sides.On reverse osmosis seawater desalting process nature, be the process of a kind of " exchanging Freshwater resources for the energy ", energy cost has formed the prime cost of reverse osmosis seawater desalting, the energy-saving and cost-reducing main path that breaks through sea water desaltination application limitation that becomes.Conventionally, for urnormal (saltiness 35000mg/L, osmotic pressure is about 2.5MPa), the working pressure of reverse osmosis seawater desalination system is generally at 5.0～6.0MPa, and the dense water pressure of discharging from membrane module is still up to 4.8～5.8MPa.If the water rate of recovery according to common 40% is calculated, in dense water, approximately there is 60% feed pressure energy, there is huge recovery value and meaning.Meanwhile, the dense water that reverse osmosis seawater desalting produces contains higher saltiness, concentration approaches 2 times of former seawater, directly discharge meeting has a negative impact to ocean environment, especially for large reverse osmosis Seawater Desalination Project, its concentrated water discharge probably causes negative impact to discharge outlet ambient ocean species, destroys its original habitat, cause species migrate or the destruction Of resources, cause marine ecology degenerate or worsen.
For reducing the system energy consumption of reverse osmosis seawater desalting, the way generally adopting both at home and abroad is at present to reclaim visible pressure energy relatively directly perceived in the dense water of reverse osmosis seawater desalting, has but ignored the potential concentration difference energy that dense water supersalinity contains.If the concentration difference of dense water can be recycled utilization, not only can effectively reduce the system energy consumption of reverse osmosis seawater desalting and make water cost, also can, by reducing sea water desaltination carbon emission and concentrated water discharge load, weaken the impact of sea water desaltination on environment.
Summary of the invention
The object of this invention is to provide a kind of dense water cascaded utilization of energy reverse osmosis seawater desalting method.
Technical scheme of the present invention is summarized as follows:
A kind of dense water cascaded utilization of energy reverse osmosis seawater desalting method, comprises the steps:
Extra large water stream A through sea water preprocessing device 1 purifying treatment is formed to pressurized stream thigh B by working shaft 2, pressurized stream thigh B is divided into stream gang C, stream gang D and stream gang E, and after miscarriage gang C enters high-pressure pump 3 pressurizations by pipeline, input reverse osmosis membrane assembly 4 forms high-pressure thick water stream K and water stream H after desalination separates; Produce water stream H and supply with water object by pipeline after preprocessor 10 is processed; Stream gang D and high-pressure thick water stream K input respectively equal pressure energy exchanger 5 and after energy transformation, export High-Pressure Water thigh L and low pressure water flow thigh N; Low pressure water flow thigh N flows into Buffer Pool 6; The stream thigh P being drawn by Buffer Pool 6 inputs respectively decompress osmosis device 8 with a stream gang E after dense water pump 7 pressurizes makes dense water concentration difference can convert hydraulic energy to, decompress osmosis device 8 output stream thigh T and stream gang R, a stream gang T enters sea, stream gang R and High-Pressure Water thigh L input respectively turbine type energy exchanger 9 and after energy transformation, export secondary booster water stream M and stream gang S, secondary booster water stream M input reverse osmosis membrane assembly 4 is produced fresh water, and a stream gang S enters sea.
Advantage of the present invention:
The present invention is from utilizing the dense Water Energy value of reverse osmosis seawater desalting, according to the feature of the dense water high pressure of sea water desaltination, high salt, the dense water cascaded utilization of energy of reverse osmosis seawater desalting mode is proposed, be specially, the first echelon is used equal pressure energy exchanger directly to reclaim the pressure energy of the dense water of reverse osmosis seawater desalting; The second echelon can be converted to hydraulic energy by decompress osmosis device by the concentration difference of the dense water of reverse osmosis seawater desalting, and re-using turbine type energy exchanger is the high pressure sea water secondary booster that the first echelon produces, thereby realizes the energy-saving and emission-reduction of sea water desaltination.This dense water cascaded utilization of energy pattern, changed reverse osmosis seawater desalination system in the past only reclaim dense water pressure can reclaim its concentration difference can Technology, so not only can reduce reverse osmosis seawater desalination system entirety energy consumption and running cost, also can reduce sea water desaltination carbon emission and concentrated water discharge load, be the desalination technology of a kind of relatively energy-conservation, low-carbon (LC), environmental protection.
In addition, the seepage-resisting sea-water desalting process the present invention relates to and device also have modularization, easily amplify and the advantage such as short implementation cycle, easy to utilize.
Brief description of the drawings
Fig. 1 is a kind of dense water cascaded utilization of energy reverse osmosis seawater desalting method schematic diagram of the present invention.
Embodiment
A kind of dense water cascaded utilization of energy reverse osmosis seawater desalting method, comprises the steps:
Extra large water stream A through sea water preprocessing device 1 purifying treatment is formed to pressurized stream thigh B by working shaft 2, pressurized stream thigh B is divided into stream gang C, stream gang D and stream gang E, and after miscarriage gang C enters high-pressure pump 3 pressurizations by pipeline, input reverse osmosis membrane assembly 4 forms high-pressure thick water stream K and water stream H after desalination separates; Produce water stream H and supply with water object by pipeline after preprocessor 10 is processed; Stream gang D and high-pressure thick water stream K input respectively equal pressure energy exchanger 5 and after energy transformation, export High-Pressure Water thigh L and low pressure water flow thigh N; Low pressure water flow thigh N flows into Buffer Pool 6; The stream thigh P being drawn by Buffer Pool 6 inputs respectively decompress osmosis device 8 with a stream gang E after dense water pump 7 pressurizes makes dense water concentration difference can convert hydraulic energy to, decompress osmosis device 8 output stream thigh T and stream gang R, a stream gang T enters sea, stream gang R and High-Pressure Water thigh L input respectively turbine type energy exchanger 9 and after energy transformation, export secondary booster water stream M and stream gang S, secondary booster water stream M input reverse osmosis membrane assembly 4 is produced fresh water, and a stream gang S enters sea.
Claims (1)
1. a dense water cascaded utilization of energy reverse osmosis seawater desalting method, it is characterized in that comprising the steps: the extra large water stream A through sea water preprocessing device (1) purifying treatment is formed to pressurized stream thigh B by working shaft (2), pressurized stream thigh B is divided into stream gang C, stream gang D and stream gang E, and after stream gang C enters high-pressure pump (3) pressurization by pipeline, input reverse osmosis membrane assembly (4) forms high-pressure thick water stream K and produces water stream H after desalination separates; Produce water stream H and supply with water object by pipeline after preprocessor (10) is processed; Stream gang D and high-pressure thick water stream K input respectively equal pressure energy exchanger (5) and after energy transformation, export High-Pressure Water thigh L and low pressure water flow thigh N; Low pressure water flow thigh N flows into Buffer Pool (6); The stream thigh P being drawn by Buffer Pool (6) inputs respectively decompress osmosis device (8) with a stream gang E after dense water pump (7) pressurization makes dense water concentration difference can convert hydraulic energy to, decompress osmosis device (8) output stream thigh T and stream gang R, a stream gang T enters sea, stream gang R and High-Pressure Water thigh L input respectively turbine type energy exchanger (9) and after energy transformation, export secondary booster water stream M and stream gang S, secondary booster water stream M input reverse osmosis membrane assembly (4) is produced fresh water, and a stream gang S enters sea.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310488172.3A CN104163470B (en) | 2013-10-17 | 2013-10-17 | A kind of dense water cascaded utilization of energy reverse osmosis seawater desalting method |
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| CN201310488172.3A CN104163470B (en) | 2013-10-17 | 2013-10-17 | A kind of dense water cascaded utilization of energy reverse osmosis seawater desalting method |
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| CN104163470A true CN104163470A (en) | 2014-11-26 |
| CN104163470B CN104163470B (en) | 2015-09-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017170013A1 (en) * | 2016-03-28 | 2017-10-05 | 東洋紡株式会社 | Water production 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004081913A (en) * | 2002-08-23 | 2004-03-18 | Hitachi Zosen Corp | Sea water desalinating method by reverse osmosis |
| CN202643511U (en) * | 2012-07-10 | 2013-01-02 | 福建省水产研究所 | Low-carbon seawater staged utilization equipment |
| CN103172189A (en) * | 2013-04-09 | 2013-06-26 | 中国科学院化学研究所 | Device for generating power by utilizing osmosis energy |
| JP2013128874A (en) * | 2011-12-20 | 2013-07-04 | Kayaba System Machinery Kk | Seawater desalination apparatus |
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2013
- 2013-10-17 CN CN201310488172.3A patent/CN104163470B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004081913A (en) * | 2002-08-23 | 2004-03-18 | Hitachi Zosen Corp | Sea water desalinating method by reverse osmosis |
| JP2013128874A (en) * | 2011-12-20 | 2013-07-04 | Kayaba System Machinery Kk | Seawater desalination apparatus |
| CN202643511U (en) * | 2012-07-10 | 2013-01-02 | 福建省水产研究所 | Low-carbon seawater staged utilization equipment |
| CN103172189A (en) * | 2013-04-09 | 2013-06-26 | 中国科学院化学研究所 | Device for generating power by utilizing osmosis energy |
Non-Patent Citations (1)
| Title |
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| 吴水波等: "基于等压式能量回收装置的反渗透淡化系统模型", 《中国给水排水》, vol. 28, no. 23, 1 December 2012 (2012-12-01) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017170013A1 (en) * | 2016-03-28 | 2017-10-05 | 東洋紡株式会社 | Water production 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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| CN104163470B (en) | 2015-09-09 |
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