CN106800351A - Full Membrane seawater desalination and strong brine utilization system - Google Patents
Full Membrane seawater desalination and strong brine utilization system Download PDFInfo
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- CN106800351A CN106800351A CN201611061752.4A CN201611061752A CN106800351A CN 106800351 A CN106800351 A CN 106800351A CN 201611061752 A CN201611061752 A CN 201611061752A CN 106800351 A CN106800351 A CN 106800351A
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- reverse osmosis
- water
- strong brine
- nanofiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of full Membrane seawater desalination and strong brine utilization system, including the sea water desalinating unit and enrichment facility connected by pipeline；Wherein sea water desalinating unit includes the reverse osmosis pretreatment device, first-stage reverse osmosis device and the desalination pond that are connected with pipeline；Enrichment facility includes one-level nanofiltration device, two grades of nanofiltration devices and MVR crystallizers；The delivery port of the strong brine of first-stage reverse osmosis device is connected with the water inlet of one-level nanofiltration device；The delivery port of the condensed water of one-level nanofiltration device is connected with the water inlet of MVR crystallizers；The delivery port of the filtered water of one-level nanofiltration device is connected with the water inlet of two grades of nanofiltration devices；Two grades of delivery ports of the filtered water of nanofiltration device are connected with the water inlet of first-stage reverse osmosis device；Two grades of delivery ports of the condensed water of nanofiltration device are connected with the water inlet of MVR crystallizers.The system can realize that chemical products are extracted in zero-emission, and integrated use energy consumption during filtering reduces integrated operation cost.
Description
Technical field
The present invention relates to field of seawater desalination, more particularly to a kind of full Membrane seawater desalination and strong brine comprehensive utilization are
System.
Background technology
In recent years, China's desalinization industry was developed rapidly, and China some areas are alleviated to a certain extent
The problem of water resource worsening shortages.But with continuing to develop for desalinization industry, desalination by-product strong brine emission problem is got over
The attention of people is obtained to get over, at present, most desalination strong brine is all directly discharged into ocean, due to its salt content ratio of strong brine
Seawater is high 1~3 times, and directly row sea can cause very big pollution to ocean, and certain destruction is caused to local marine ecology.And
A day solar salt is carried out to it using salt pan, because the demand in soil also governs the development of desalinization industry.
In order to reduce pollution of the strong brine to ocean, while effectively using the chemical element in concentrated seawater, using zero-emission
Discharge technique, desalinates seawater, and extracts chemical products to strong brine, has efficacious prescriptions to marine ecology influence as reducing
Method.But the concentration technology to strong brine needs to consume substantial amounts of energy consumption at present, seriously governs the utilization of strong brine.
The content of the invention
In order to realize the zero-emission of desalinization, the present invention provides a kind of full Membrane seawater desalination and strong brine comprehensive utilization
System, chemical products, and the integrated use energy consumption in filter process are extracted using zero-discharge technology, reduce desalinization skill
The integrated operation cost of art.
Therefore, technical program of the present invention lies in：
A kind of full Membrane seawater desalination and strong brine utilization system, including the sea water desalinating unit connected by pipeline
And enrichment facility；
The sea water desalinating unit includes the reverse osmosis pretreatment device, first-stage reverse osmosis device and the desalination that are connected with pipeline
Pond；The desalination pond is connected with the filtered water delivery port of the first-stage reverse osmosis device；The first-stage reverse osmosis device
The delivery port of strong brine be connected with the enrichment facility；
The enrichment facility includes one-level nanofiltration device, two grades of nanofiltration devices and MVR crystallizers；The first-stage reverse osmosis dress
The delivery port of the strong brine put is connected with the water inlet of the one-level nanofiltration device；The condensed water of the one-level nanofiltration device goes out
The mouth of a river is connected with the water inlet of MVR crystallizers；The delivery port of the filtered water of the one-level nanofiltration device is filled with two grades of nanofiltrations
The water inlet connection put；The delivery port of the filtered water of two grades of nanofiltration devices and the water inlet phase of the first-stage reverse osmosis device
Even；The delivery port of the condensed water of two grades of nanofiltration devices is connected with the water inlet of MVR crystallizers.
Further, the product that the MVR crystallizers are obtained obtains different chemical products through salt manufacturing and salt chemical engineering device.
Salt manufacturing and salt chemical engineering device, including the salt making equipment being sequentially connected, potassium chloride equipment, magnesium sulfate equipment, bromine set
It is standby, magnesium chloride equipment.Using multiple-effect evaporation, adding halogen method, Air blowing, the system such as single effect evaporation produces sodium chloride, potassium chloride, sulphur
The chemical products such as sour magnesium, bromine and magnesium chloride.
It is preferred that, the reverse osmosis pretreatment device includes the heat-exchange device, piping filter, the ultrafiltration dress that are sequentially connected
Put, ultrafiltration pond and cartridge filter.
It is preferred that, the first-stage reverse osmosis device is one-level two-part reverse osmosis unit, can be brought up to seawater recoveries
64%~67%, strong brine can be concentrated into 9 Baume degrees and more than.
The reverse osmosis unit includes one section of high-pressure pump, one section of RO membrane module, two sections of booster pumps, two sections of RO membrane modules, energy
Amount retracting device and desalination pond；
Preferably, the upstream end of the MVR crystallizers connects one end of energy recycle device, the energy recycle device
The other end is connected to the inlet end of the first-stage reverse osmosis device.Further preferably, before strong brine enters MVR crystallizers, through pipe
Road connection enters energy recycle device, and the energy recycle device is integrally formed with RO water inlet end high-pressure pumps.
One-level nanofiltration device and two grades of nanofiltration devices strong brine out are through energy recycle device, the pressure energy for being carried
The mechanical energy of the high-pressure pump of first-stage reverse osmosis device is transferred to, the one-level NF device rate of recovery is set to 62%~70%.
The transmission water of the one-level NF devices is connected by pipeline and enters two grades of nanofiltration devices, first passes around two grades of NF high pressures
Pump, to being pressurized through water, subsequently into NF film devices.After separated concentration, two grades of NF device concentrated water concentration reach 15 ripples
U.S. degree, is connected, into MVR crystallizers by concentrated water pipeline with one-level NF concentrated water pipelines.
The transmission water of two grades of NF devices is connected by pipeline and is back to desalinization RO device water inlet pipes.Two grades of NF dresses
Put back into yield and be set to 75%~85%.
Preferably, the one-level nanofiltration device and two grades of nanofiltration devices may be configured as one section, two sections or multistage setting.
By technical scheme described in enrichment facility, original RO strong brines can be directly entered MVR crystallizers, ton water consumption
8kwh is reduced to from 17kwh, the energy consumption cost of extra large light technique of zero discharge is greatly reduced.
What the present invention can reach has the technical effect that：
1) it is overall to realize " zero-emission " effect that seawater resources are utilized, while desalination water is obtained, strong brine is carried out
Comprehensive utilization, has obtained various chemical products, improves the utilization rate of seawater, integrally reduce the operation of desalinization into
This, and industrialization income can be obtained.
2) comprehensive utilization of strong brine avoids the influence arranged outside strong brine to marine eco-environment system, protects ring
Border.
3) strong brine of desalinization is by nanofiltration and reverse-osmosis circulating combined system, by strong brine concentration from 9 Baume degrees
15 Baume degrees are concentrated to, strong brine salt content is greatly improved, the treatment water of follow-up salt making equipment is reduced, energy is reduced
Consumption.
4) desalinization and concentration are carried out using full embrane method, with high degree of automation, takes up an area small, it is excellent that separative efficiency is high etc.
Point.
Brief description of the drawings
Fig. 1 is the full Membrane seawater desalination for providing of the invention and the structure chart of strong brine utilization system；
Fig. 2 is the structural representation of sea water desalinating unit in Fig. 1；
Fig. 3 is the structural representation of enrichment facility in Fig. 1.
Specific embodiment
Technical scheme is described in detail below in conjunction with the drawings and specific embodiments.
As shown in Figures 1 to 3, a kind of full Membrane seawater desalination and strong brine utilization system, including connected by pipeline
Sea water desalinating unit and enrichment facility；
The sea water desalinating unit includes the reverse osmosis pretreatment device, first-stage reverse osmosis device and the desalination that are connected with pipeline
Pond；The desalination pond is connected with the filtered water delivery port of the first-stage reverse osmosis device；The first-stage reverse osmosis device
The delivery port of strong brine be connected with the enrichment facility；
The enrichment facility includes one-level nanofiltration device, two grades of nanofiltration devices and MVR crystallizers (Mechanical Vapor
Recompression Crystallizer)；The delivery port of the strong brine of the first-stage reverse osmosis device and the one-level nanofiltration
The water inlet connection of device；The delivery port of the condensed water of the one-level nanofiltration device is connected with the water inlet of MVR crystallizers；It is described
The delivery port of the filtered water of one-level nanofiltration device is connected with the water inlet of two grades of nanofiltration devices；Two grades of nanofiltration devices
The delivery port of filtered water is connected with the water inlet of the first-stage reverse osmosis device；The water outlet of the condensed water of two grades of nanofiltration devices
Mouth is connected with the water inlet of MVR crystallizers.
Further, the product that the MVR crystallizers are obtained obtains different chemical products through salt manufacturing and salt chemical engineering device.System
Salt and salt chemical engineering device, including the salt making equipment being sequentially connected, potassium chloride equipment, magnesium sulfate equipment, bromine equipment, magnesium chloride set
It is standby.Using multiple-effect evaporation, adding halogen method, Air blowing, the system such as single effect evaporation produces sodium chloride, potassium chloride, magnesium sulfate, bromine and
The chemical products such as magnesium chloride.
It is preferred that, the reverse osmosis pretreatment device includes the heat-exchange device, piping filter, the ultrafiltration dress that are sequentially connected
Put, ultrafiltration pond and cartridge filter.
It is preferred that, the first-stage reverse osmosis device is one-level two-part reverse osmosis unit, can be brought up to seawater recoveries
64%~67%, strong brine can be concentrated into 9 Baume degrees and more than.
Temperature is brought up to preference temperature by the seawater by heat-exchange device, (25 DEG C or so), can be good at improving
The treatment water of membrane module, improves the aquifer yield of system, when particularly water temperature in winter is relatively low, ensure that system stable operation.
The piping filter, ultrafiltration apparatus, cartridge filter are reverse osmosis pretreatment device, outstanding for what is gone in water removal
The impurities in water such as float, colloid, large particulate matter, prevent reverse osmosis membrane structure from being destroyed, it is ensured that counter-infiltration stable operation.
The reverse osmosis unit includes one section of high-pressure pump, one section of RO membrane module, two sections of booster pumps, two sections of RO membrane modules, energy
Amount retracting device and desalination pond；
Preferably, the upstream end of the MVR crystallizers connects one end of energy recycle device, the energy recycle device
The other end is connected to the inlet end of the first-stage reverse osmosis device.Further preferably, before strong brine enters MVR crystallizers, through pipe
Road connection enters energy recycle device, and the energy recycle device is integrally formed with RO water inlet end high-pressure pumps.
One-level nanofiltration device and two grades of nanofiltration devices strong brine out through energy can defeated device, the pressure for being carried turns
The mechanical energy of the high-pressure pump of first-stage reverse osmosis device is given, the one-level NF device rate of recovery is set to 62%~70%.
As shown in figure 3, in one embodiment of the invention, two grades of nanofiltration devices are two sections of nanofiltration devices of one-level.It is described
The transmission water of one-level NF devices is connected by pipeline and enters two sections of nanofiltration devices of one-level, first passes around two sections of NF high-pressure pumps of one-level,
To being pressurized through water, subsequently into NF film devices.After separated concentration, two sections of NF device concentrated water concentration of one-level reach 15 ripples
U.S. degree, is connected, into MVR crystallizers by concentrated water pipeline with one-level NF concentrated water pipelines.Two sections of transmissions of NF devices of the one-level
Water is connected by pipeline and is back to desalinization RO device water inlet pipes.Two sections of NF device rate of recovery of one-level are set to 75%~
85%.
Preferably, the one-level NF devices may be configured as one section, two sections or multistage is set.
By technical scheme described in enrichment facility, original RO strong brines can be directly entered MVR crystallizers, ton water consumption
8kwh is reduced to from 17kwh, the energy consumption cost of extra large light technique of zero discharge is greatly reduced.
The operation principle of the full Membrane seawater desalination and strong brine utilization system is as follows：Seawater enters desalinization system
System, through treatment, filtered water (fresh water) supply desalination water user use, and strong brine enters enrichment facility, and the concentration of strong brine is carried
It is high to more than 15 Baume degrees when, into MVR crystallizers, obtain dense salt slurry, dense salt slurry enters salt manufacturing and salt chemical engineering device, is changed
Chemical product.Specifically, seawater enters heat-exchange device, ocean temperature is maintained 25 DEG C or so, into piping filter, surpasses
Filter, filtered water is stand-by into ultrafiltration pond, and ultrafiltration water enters first-stage reverse osmosis device, through anti-through cartridge filter after supercharging
Filtered water after permeation filtration is fresh water, and into desalination pond, supply desalination water user uses；Through the dense salt after reverse osmosis concentration
Water enters one-level nanofiltration device, is reached more than 15 Baume degrees through the strong brine concentration of one-level nanofiltration device, through energy conversion device,
Pressure transmission to first-stage reverse osmosis device, save energy, through MVR crystallizers, are obtained into dense salt slurry, dense salt slurry enters salt manufacturing and salt
Chemical plant installations, obtains chemical products.The filtered water of one-level nanofiltration device enters two sections of nanofiltration devices of one-level, and filtered water enters one
The water inlet pipe of level counter-infiltration, through energy conversion device, by pressure transmission to first-stage reverse osmosis device, save energy is passed through condensed water
MVR crystallizers, obtain dense salt slurry, and dense salt slurry enters salt manufacturing and salt chemical engineering device, obtains chemical products.
Claims (7)
1. a kind of full Membrane seawater desalination and strong brine utilization system, including the sea water desalinating unit that is connected by pipeline and
Enrichment facility；It is characterized in that：
The sea water desalinating unit includes the reverse osmosis pretreatment device, first-stage reverse osmosis device and the desalination water that are connected with pipeline
Pond；The desalination pond is connected with the filtered water delivery port of the first-stage reverse osmosis device；The first-stage reverse osmosis device
The delivery port of strong brine is connected with the enrichment facility；
The enrichment facility includes one-level nanofiltration device, two grades of nanofiltration devices and MVR crystallizers；The first-stage reverse osmosis device
The delivery port of strong brine is connected with the water inlet of the one-level nanofiltration device；The delivery port of the condensed water of the one-level nanofiltration device
Water inlet with MVR crystallizers is connected；The delivery port of the filtered water of the one-level nanofiltration device and two grades of nanofiltration devices
Water inlet is connected；The delivery port of the filtered water of two grades of nanofiltration devices is connected with the water inlet of the first-stage reverse osmosis device；
The delivery port of the condensed water of two grades of nanofiltration devices is connected with the water inlet of MVR crystallizers.
2. full Membrane seawater desalination and strong brine utilization system as claimed in claim 1, it is characterised in that：The counter-infiltration
Pretreatment unit includes the heat-exchange device, piping filter, ultrafiltration apparatus, ultrafiltration pond and the cartridge filter that are sequentially connected.
3. full Membrane seawater desalination and strong brine utilization system as claimed in claim 1 or 2, it is characterised in that：The MVR
One end of energy recycle device is connected before crystallizer, the other end of the energy recycle device is connected to the first-stage reverse osmosis
The inlet end of device.
4. full Membrane seawater desalination and strong brine utilization system as described in claim 1 or 2 or 3, it is characterised in that：Also wrap
Salt manufacturing and salt chemical engineering device are included, the MVR crystallizers are connected with salt manufacturing and salt chemical engineering device.
5. full Membrane seawater desalination and strong brine utilization system as claimed in claim 4, it is characterised in that：The salt manufacturing and
Salt chemical engineering device, including the salt making equipment being sequentially connected, potassium chloride equipment, magnesium sulfate equipment, bromine equipment, magnesium chloride equipment.
6. full Membrane seawater desalination and strong brine utilization system as described in claim 1 or 2 or 3, it is characterised in that：It is described
First-stage reverse osmosis device is one-level two-part reverse osmosis unit.
7. full Membrane seawater desalination and strong brine utilization system as described in claim 1 or 2 or 3, it is characterised in that：It is described
One-level nanofiltration device is one section, two sections or multistage；Two grades of nanofiltration devices are one section, two sections or multistage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611061752.4A CN106800351A (en) | 2016-11-25 | 2016-11-25 | Full Membrane seawater desalination and strong brine utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611061752.4A CN106800351A (en) | 2016-11-25 | 2016-11-25 | Full Membrane seawater desalination and strong brine utilization system |
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| Publication Number | Publication Date |
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| CN106800351A true CN106800351A (en) | 2017-06-06 |
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ID=58984141
Family Applications (1)
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| CN201611061752.4A Pending CN106800351A (en) | 2016-11-25 | 2016-11-25 | Full Membrane seawater desalination and strong brine utilization system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108059213A (en) * | 2017-09-22 | 2018-05-22 | 内蒙古久科康瑞环保科技有限公司 | The combination nanofiltration of high-recovery and high sulfate radical rejection divides salt technique and system |
| CN109485173A (en) * | 2018-10-28 | 2019-03-19 | 唐山钢铁集团有限责任公司 | The secondary treatment system and re-treating process of reverse osmosis concentrated salt water |
| CN114031238A (en) * | 2021-12-02 | 2022-02-11 | 靖江市亚泰新机电科技有限公司 | Process method for realizing comprehensive utilization of seawater resources |
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| GB2395946B (en) * | 2002-12-05 | 2006-01-18 | Thomas Altmann | Method for the production of sodium chloride from seawater |
| CN1583605A (en) * | 2004-06-12 | 2005-02-23 | 杭州水处理技术研究开发中心 | Method and equipment for desalting seawater |
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| CN108059213A (en) * | 2017-09-22 | 2018-05-22 | 内蒙古久科康瑞环保科技有限公司 | The combination nanofiltration of high-recovery and high sulfate radical rejection divides salt technique and system |
| CN109485173A (en) * | 2018-10-28 | 2019-03-19 | 唐山钢铁集团有限责任公司 | The secondary treatment system and re-treating process of reverse osmosis concentrated salt water |
| CN114031238A (en) * | 2021-12-02 | 2022-02-11 | 靖江市亚泰新机电科技有限公司 | Process method for realizing comprehensive utilization of seawater resources |
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Application publication date: 20170606 |