CN105967373A - Sea water desalination method - Google Patents
Sea water desalination method Download PDFInfo
- Publication number
- CN105967373A CN105967373A CN201610492681.7A CN201610492681A CN105967373A CN 105967373 A CN105967373 A CN 105967373A CN 201610492681 A CN201610492681 A CN 201610492681A CN 105967373 A CN105967373 A CN 105967373A
- Authority
- CN
- China
- Prior art keywords
- filtrate
- water
- sea water
- membrane
- desalination
- 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
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Classifications
-
- 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
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
Abstract
The invention discloses a sea water desalination method. The method comprises steps as shown in the specification. By the method disclosed by the invention, when sea water is treated deeply, pollutants in the sea water can be separated effectively, an effect of purifying water is achieved, furthermore, useful substances can further be retained, and utilization rate of water resources is increased; by a security filter and an ultrafiltration film, toxic and harmful substances in the sea water can be removed to a maximum degree, and meanwhile, a proper amount of trace elements and mineral substances are retained; and fresh water produced by desalination of the method has salinity required for halophilic economic crops, trace elements such as sodion and potassium ions and mineral substances which are required for growth of plants are supplemented, so that growth of plants is good, and the yield of the plants is high.
Description
Technical field
The present invention relates to the desalination method of a kind of water, particularly relate to a kind of method for desalting seawater.
Background technology
Along with expanding economy and the raising day by day of living standards of the people, all trades and professions to the demand of fresh water with
And prescription is more and more higher.Such as, fresh water can make fresh ice, at aquatic products, meat, food
In the course of processing, flake ice can keep the fresh of its product；At supermarket and fishery market, fresh ice can
To extend its storage phase, it is ensured that freshness；During long-distance transport, such as long range fishing, vegetable length
Distance transport, fresh ice is it is also ensured that it is fresh.In this external concrete works, fresh ice also has important
Application.
And have be about being not suitable for or cannot directly drink usual by salinity to be in seawater resources
The water of more than 1000mg/L is referred to as sea water.Sea water is divided into again low concentration sea water by the height of salinity
(more than 1800mg/L), camber bitter (more than 1800-5800mg/L), and high concentration sea water
(more than 5800mg/L).Typically, the general 1800-8000mg/L of the salt content in sea water.
How research utilizes seawater resources, and is the weight ensureing and improving Drinking Water in China quality by seawater resources
Big problem.
Summary of the invention
The invention discloses a kind of containing method for desalting seawater, to solve at least the one of above-mentioned technical problem
Individual.
According to an aspect of the present invention, disclosing a kind of method for desalting seawater, the method is by following step
Composition:
(1) sea water is carried out pretreatment, sea water is carried out single filter by more medium filter, remove
In sea water, diameter is more than the impurity of 0.1 millimeter, and by activated carbon, sea water is carried out chloride ion absorption, obtains the
One filtrate；
(2) carry out filtering and ultrafiltration by cartridge filter and ultrafiltration apparatus, by the first mistake in step (1)
Impurity and microorganism in filtrate are removed, and remove the colloidal solid of a diameter of 1～20 micron, obtain second
Filtrate；
(3) the second filtrate is carried out desalination by special membrane filtration system, it is thus achieved that micro-salinity exists
The water of 0.08-0.15%, the i.e. the 3rd filtrate,
Desalination processes, ambient temperature is 10-30 DEG C, and Stress control in 0.2-2.0MPa, water inlet scope is
3-30L/min；
(4). the 3rd filtrate is carried out four times by ultrafilter membrane and filters, remove in the 3rd filtrate a diameter of
The antibacterial of 0.001～0.11 micron, obtains the 4th filtrate；
4th filtrate by desalinating, is removed the salinity in sea water, is obtained purity and be more than by step (5)
Desalination water equal to 99.9；
Wherein, activated carbon is that weight specific surface area is 400～1800m2/g；The water-flowing amount of cartridge filter
For 30m3/h；Ultrafiltration apparatus uses doughnut or Ceramic excessive filtration membrane module to make, wherein, and special membrane mistake
Membrane material in filter system uses polypropylene hollow fiber perforated membrane to make, special membrane filtration system effective
Aperture of damming is 0.009-0.2 μm.
In some embodiments, the implant in the more medium filter of step (1) is activated carbon, quartz
One or more in sand, anthracite.
In some embodiments, the filtration fraction in cartridge filter uses polypropylene material to make.
In some embodiments, ultrafilter membrane uses and is polyethylene and polypropylene is made.
Each above-mentioned filtration fraction, as cartridge filter, ultrafilter membrane all can be made up of polypropylene, poly-
Propylene has the feature of length in service life, can extend the service life of the present invention.
Use the method for the present invention when sea water is carried out advanced treating, be possible not only to the pollution in sea water
Thing is effectively separated, and plays the effect of purification of water quality, moreover it is possible to retain utility, improves water resource
Utilization rate；Venomous injurant in sea water can be removed farthest by cartridge filter and ultrafilter membrane
Appropriate trace element and mineral is remained again while matter；The fresh water tool of institute's output is desalinated through this method
There is the saline and alkaline that the raw industrial crops of salt are special procured, and needed for supplementary plant growing, sodium ion, potassium ion etc. are micro-
Secondary element and mineral, make plant growing way more preferably, yield higher.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method for desalting seawater of one embodiment of the present invention.
Detailed description of the invention
Fig. 1 schematically shows the flow process of the method for desalting seawater of one embodiment of the present invention.
As it is shown in figure 1, a kind of method for desalting seawater, the method is made up of following step:
S101. sea water being carried out pretreatment, by sea water, by more medium filter, (i.e. the inside is containing multiple
Filter article, such as activated carbon, Alumen etc.) carry out single filter, remove diameter in sea water and be more than 0.1 millimeter
Impurity, sea water is carried out chloride ion absorption by activated carbon, obtains the first filtrate；
S102. carry out filtering and ultrafiltration by cartridge filter and ultrafiltration apparatus, removal step S101 first
Impurity in filtrate and microorganism, the i.e. final colloidal solid removing a diameter of 1～20 micron, obtain the
Two filtrate；Enter next step；
S103. the second filtrate is carried out desalination by special membrane filtration system, it is thus achieved that micro-salinity exists
The water of 0.08-0.15%, the i.e. the 3rd filtrate, in desalination processes, preferred ambient temperature is 10-30 DEG C,
Preferably Stress control is at 0.2-2.0mPa, and preferred water inlet scope is 3-30L/min；
S104. by ultrafilter membrane, the 3rd filtrate is carried out four times to filter, remove in the 3rd filtrate a diameter of
The antibacterial of 0.001～0.11 micron, obtains the 4th filtrate；
S105. by the 4th filtrate by desalinating, remove the salinity in sea water, obtain purity and be more than
Desalination water equal to 99.9；Wherein, activated carbon is that weight specific surface area is 400～1800m2/g；Security personnel
The water-flowing amount of filter is 30m3/h；Ultrafiltration apparatus uses good hydrophilic property and the doughnut of molecular weight
Or Ceramic excessive filtration membrane module；Special membrane filtration system is commercially available standard device (commercially available sell),
Wherein, the membrane material in special membrane filtration system uses commercially available polypropylene hollow fiber perforated membrane, extraordinary
Film aperture of effectively damming is 0.009-0.2 μm.
Typically, the implant in the more medium filter of step S101 is activated carbon, quartz sand, nothing
One or more in bituminous coal.
In the present embodiment, the filtering material of cartridge filter can use rustless steel and polypropylene to make
(wherein rustless steel is shaped to mesh screen shape), in other embodiments, the filtering material of cartridge filter
Can also be such as: cellulose, phenolic resin, cellulose, melamine resin, glass fibre, phenolic aldehyde tree
One or more in fat, glass fibre, melamine resin.
In the present embodiment, the material of ultrafilter membrane can be polyethylene and polypropylene.In other embodiments,
Ultrafilter membrane can also is that in polrvinyl chloride, polysulfones, polyether sulfone, Kynoar, politef
Plant or multiple.
The material of above-mentioned all parts is merely illustrative, and does not limit to material described above, Ren Heke
All it is applicable to this realizing the material of the function in step S101, S102, S103, S104 and S105
Bright.
Beneficial effects of the present invention: using this method when sea water is carried out advanced treating, it is right to be possible not only to
Pollutant in sea water are effectively separated, and play the effect of purification of water quality, moreover it is possible to retain utility,
Improve the utilization rate of water resource；Sea water can be removed farthest by cartridge filter and ultrafilter membrane
Appropriate trace element and mineral is remained again while middle poisonous and harmful substance；Institute is desalinated through this method
The fresh water of output has a saline and alkaline that the raw industrial crops of salt are special procured, and needed for supplementary plant growing sodium from
Trace element and the mineral such as son, potassium ion, make plant growing way more preferably, yield higher.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, it is also possible to make some deformation and improvement,
These broadly fall into protection scope of the present invention.
Claims (4)
1. a method for desalting seawater, it is characterised in that: described method is made up of following step:
(1) sea water is carried out pretreatment, sea water is carried out single filter by more medium filter, remove sea
In water, the diameter impurity more than 0.1 millimeter, carries out chloride ion absorption by sea water by activated carbon, obtains first
Filtrate；
(2) carry out filtering and ultrafiltration by cartridge filter and ultrafiltration apparatus, by the first mistake in step (1)
Impurity and microorganism in filtrate are removed, and remove the colloidal solid of a diameter of 1～20 micron, obtain second
Filtrate；
(3) the second filtrate is carried out desalination by special membrane filtration system, it is thus achieved that micro-salinity exists
The water of 0.08-0.15%, the i.e. the 3rd filtrate,
Ambient temperature in described desalination processes is 10-30 DEG C, and Stress control is at 0.2-2.0MPa, water inlet model
Enclose for 3-30L/min；
(4). the 3rd filtrate is carried out four times by ultrafilter membrane and filters, remove in the 3rd filtrate a diameter of
The antibacterial of 0.001～0.11 micron, obtains the 4th filtrate；
4th filtrate is desalinated by step (5), removes the salinity in sea water, obtains purity and be more than or equal to
99.9 desalination water；
Wherein, described activated carbon is that weight specific surface area is 400～1800m2/g；Described cartridge filter
Water-flowing amount be 30m3/h；Described ultrafiltration apparatus uses doughnut or Ceramic excessive filtration membrane module to make, its
In, the membrane material in described special membrane filtration system uses polypropylene hollow fiber perforated membrane to make, described
The aperture of effectively damming of special membrane filtration system is 0.009-0.2 μm.
Method for desalting seawater the most according to claim 1, it is characterised in that described many Jie of step (1)
Implant in mass filter is one or more in activated carbon, quartz sand, anthracite.
Method for desalting seawater the most according to claim 2, it is characterised in that described cartridge filter
In filtration fraction use polypropylene material make.
Method for desalting seawater the most according to claim 3, it is characterised in that described ultrafilter membrane uses
It is polyethylene and polypropylene is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610492681.7A CN105967373A (en) | 2016-06-29 | 2016-06-29 | Sea water desalination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610492681.7A CN105967373A (en) | 2016-06-29 | 2016-06-29 | Sea water desalination method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105967373A true CN105967373A (en) | 2016-09-28 |
Family
ID=57020216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610492681.7A Pending CN105967373A (en) | 2016-06-29 | 2016-06-29 | Sea water desalination method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105967373A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106745905A (en) * | 2017-01-23 | 2017-05-31 | 福建海西滤水龙头研究中心有限公司 | A kind of desalinization integral type composite filter element |
| CN117180989A (en) * | 2023-09-19 | 2023-12-08 | 广东诚刻新材料有限公司 | Organic-inorganic hybrid ultrafiltration membrane and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2395946A (en) * | 2002-12-05 | 2004-06-09 | Thomas Altmann | Extracting sodium chloride from seawater, using nanofiltration |
| US20090050563A1 (en) * | 2007-08-20 | 2009-02-26 | Earth Renaissance Technologies, Llc. | Treatment method for reverse osmosis filtration systems |
| CN103086529A (en) * | 2013-01-25 | 2013-05-08 | 宁波万杰水务技术有限公司 | Method for preparing fresh-water ice by utilizing seawater and brackish water |
| CN104108813A (en) * | 2014-07-17 | 2014-10-22 | 中国石油天然气股份有限公司 | Refining and chemical sewage desalting integrated treatment process and device |
| CN104445692A (en) * | 2014-11-27 | 2015-03-25 | 新疆德蓝股份有限公司 | Method for purifying bitter salty water into micro salt-containing water |
| CN104710040A (en) * | 2015-03-19 | 2015-06-17 | 南京九思高科技有限公司 | High-recovery-rate process for treating high-sulfate-content high-hardness mine water |
-
2016
- 2016-06-29 CN CN201610492681.7A patent/CN105967373A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2395946A (en) * | 2002-12-05 | 2004-06-09 | Thomas Altmann | Extracting sodium chloride from seawater, using nanofiltration |
| US20090050563A1 (en) * | 2007-08-20 | 2009-02-26 | Earth Renaissance Technologies, Llc. | Treatment method for reverse osmosis filtration systems |
| CN103086529A (en) * | 2013-01-25 | 2013-05-08 | 宁波万杰水务技术有限公司 | Method for preparing fresh-water ice by utilizing seawater and brackish water |
| CN104108813A (en) * | 2014-07-17 | 2014-10-22 | 中国石油天然气股份有限公司 | Refining and chemical sewage desalting integrated treatment process and device |
| CN104445692A (en) * | 2014-11-27 | 2015-03-25 | 新疆德蓝股份有限公司 | Method for purifying bitter salty water into micro salt-containing water |
| CN104710040A (en) * | 2015-03-19 | 2015-06-17 | 南京九思高科技有限公司 | High-recovery-rate process for treating high-sulfate-content high-hardness mine water |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106745905A (en) * | 2017-01-23 | 2017-05-31 | 福建海西滤水龙头研究中心有限公司 | A kind of desalinization integral type composite filter element |
| CN117180989A (en) * | 2023-09-19 | 2023-12-08 | 广东诚刻新材料有限公司 | Organic-inorganic hybrid ultrafiltration membrane and preparation method thereof |
| CN117180989B (en) * | 2023-09-19 | 2024-04-05 | 广东诚刻新材料有限公司 | Organic-inorganic hybrid ultrafiltration membrane and preparation method thereof |
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Application publication date: 20160928 |