CN105621756A - Brackish water desalination treatment method and device - Google Patents
Brackish water desalination treatment method and device Download PDFInfo
- Publication number
- CN105621756A CN105621756A CN201510997893.6A CN201510997893A CN105621756A CN 105621756 A CN105621756 A CN 105621756A CN 201510997893 A CN201510997893 A CN 201510997893A CN 105621756 A CN105621756 A CN 105621756A
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- CN
- China
- Prior art keywords
- water
- desalination
- deionization module
- brackish
- capacitive deionization
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Classifications
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4691—Capacitive deionisation
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- 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
Abstract
The invention provides a brackish water desalination treatment method and device. The brackish water desalination treatment method comprises the following steps that raw water sequentially passes through a sand filter and an ultrafilter through a first booster pump, particles, foul, bacteria and macromolecular organic compounds are removed to obtain pretreated producing water; the pretreated water flows into a first-stage capacitance deionization module to complete 66% of a desalination task so as to obtain desalinated water subjected to preliminary desalination, and concentrated water for back washing is discharged; the preliminarily desalinated water flows into a second-stage capacitance deionization module through a second booster pump to complete 95% of desalination treatment so as to obtain fresh water with the total dissolved solid content lower than the content specified by the national sanitary standard for drinking water, and concentrated water for back washing returns to the first-stage capacitance deionization module to be reused. The brackish water desalination treatment method improves the utilization rate of desalted water and reduces the cost for brackish water desalination.
Description
Technical field
The invention belongs to technique for desalting salt water field, especially relate to a kind of brackish water desalination treatment process and device thereof.
Background technology
Water resources seriously shortage become restriction China water-deficient area, the particularly important factor of the Northwest's Economic development. For the Northwest, its land area accounts for the 1/3 of the whole nation, but unit surface gross amount of water resources is only the 1/5 of national average value, and a large amount of water is senior middle school's salinity brackish water, cannot directly drink. And membrane separation technique is because of features such as it are efficient, pollution-free, strong adaptability, technique are simple, easy to maintenance, becomes the main flow of brackish water desalination, played a part more and more important in China's water resources sustainable development strategy.
Usually total dissolved solidss in water (TDS) content is called brackish water at the natural water of 1000mg/L��10000mg/L. Existing embrane method technique of desalinating saline water mainly comprises reverse osmosis and nanofiltration is pressure-driven, along with the TDS content of brackish water is more high, the working pressure desalinated by brackish water is more big, inevitable requirement uses high voltage bearing container and tubing system, in order to energy-conservation, also needing to be equipped with energy recycle device, its result improves equipment entirety investment; Secondly, the corrodibility that the supersalinity of brackish water has, has harsh requirement to pipe material, it is necessary to adopt special corrosion-resistant material, and the investment of tubing system is the highest accounts for about the 30% of desalination system investment; Finally, in water use efficiency, the water use efficiency of reverse osmosis and Nanofiltering membrane is generally only 45%��50%, and the dense water yield of discharge is very big, and above-mentioned factor causes the investment of bitter salt water desalting equipment and make water cost higher. Research and develop new, low cost technique of desalinating saline water, break through prior art bottleneck, reduce brackish water desalination system to the requirement of pipe material, reduce ton water current consumption, it is to increase the water use efficiency of desalination becomes development trend and active demand.
Summary of the invention
In view of this, the present invention is intended to propose a kind of brackish water desalination treatment process and device thereof, to improve the utilization ratio of desalination water, reduces the cost of brackish water desalination.
For achieving the above object, the technical scheme of the present invention is achieved in that
A kind of brackish water desalination treatment process and device thereof, comprise the following steps: (1) former water successively through sand-bed filter and ultra-fine filter by the first force (forcing) pump, is removed particle, dirt, bacterium and larger molecular organics and obtained pre-treatment product water; (2) pretreated water enters the desalination task that first step capacitive deionization module completes 66%, obtains the dehydration salt of preliminary desalination, the concentrated water discharge of back flushing; (3) preliminary de-salted water delivers into second stage capacitive deionization module by the 2nd force (forcing) pump, complete the desalting treatment of 95%, obtain the fresh water of the total dissolved solidss content specified lower than country's drinking water sanitary standard, the dense water of back flushing returns to first step capacitive deionization module, reuses.
Further, the working pressure < 0.3MPa of first step capacitive deionization module and second stage capacitive deionization module.
Relative to prior art, a kind of brackish water desalination treatment process of the present invention and device thereof have following advantage:
The method operating voltage of the present invention is low, can utilize the nature green energy resources such as sun power, wind energy, tidal energy; Operating hydraulic pressure is low, it is not necessary to the metal of high-voltage-resistant anti-corrosion and mechanical means, it may also be useful to cheap plastic conduit can meet requirement, it is not necessary to anticorrosion, reduces equipment cost; The pre-processing requirements of brackish water is loose; The utilization ratio of this kind of method desalination process water is significantly higher than reverse osmosis and Nanofiltering membrane, and the reduction of system pressure also eliminates expensive reverse osmosis and receives the cost of membrane filtration condensed water energy recycle device; Its device structure used is simple, and easy and simple to handle, current consumption is low, reduces maintenance greatly.
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relation be only the present invention for convenience of description and simplified characterization; instead of the device that refers to of instruction or hint or element must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention. In addition, term " first ", " the 2nd " etc. are only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technology feature. Thus, the feature being limited with " first ", " the 2nd " etc. can be expressed or implicit comprise one or more these features. In describing the invention, unless otherwise explanation, the implication of " multiple " is two or more.
In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, it is possible to be fixedly connected with, it is also possible to be removably connect, or connect integratedly; Can be mechanically connected, it is also possible to be electrical connection; Can be directly be connected, it is also possible to be indirectly connected by intermediary, it is possible to be the connection of two element internals. For the ordinary skill in the art, it is possible to understand above-mentioned term concrete implication in the present invention by particular case.
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1:
Employing the present invention processes the raw material brackish water process that saltiness is 2000mg/L, and the effect of process is as follows:
Raw material brackish water saltiness 2000mg/L, pH about 6.8, colourity 352PCU, sodium ion 625mg/L, hardness 200mg/L (in CaCO3), chlorion 1125mg/L, vitriol 190mg/L;
Continuous operation through the single-stage nearly 300h of capacitive deionization module removes salt, and the saltiness of gained de-salted water is 200mg/L, pH about 7.4, colourity 12PCU, and the total energy consumption of a complete set of technique is 0.8kWh/m3, and Water Sproading rate is then 65%.
Embodiment 2:
The process saltiness adopting the present invention to propose is the raw material brackish water process of 9000mg/L, and the effect of process is as follows:
Raw material brackish water saltiness 9000mg/L, pH about 7.0, colourity 280PCU, sodium ion 2300mg/L, hardness 1000mg/L (in CaCO3), chlorion 4400mg/L, vitriol 700mg/L;
Continuous operation through the two-stage nearly 200h of capacitive deionization module removes salt, and the saltiness of gained de-salted water is 350mg/L, pH about 7.2, colourity 10PCU. The total energy consumption of a complete set of technique is 2.0kWh/m3, and Water Sproading rate is then 60%.
Therefore, adopting method and the device of the brackish water desalination process of the present invention, process saltiness is the brackish water of 1000mg/L��10000mg/L, can directly produce the de-salted water of saltiness lower than 400mg/L, reaches the standard of country's tap water.
The foregoing is only the better embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a brackish water desalination treatment process and device thereof, it is characterized in that comprising the following steps: (1) former water successively through sand-bed filter and ultra-fine filter by the first force (forcing) pump, is removed particle, dirt, bacterium and larger molecular organics and obtained pre-treatment product water; (2) pretreated water enters the desalination task that first step capacitive deionization module completes 66%, obtains the dehydration salt of preliminary desalination, the concentrated water discharge of back flushing; (3) preliminary de-salted water delivers into second stage capacitive deionization module by the 2nd force (forcing) pump, complete the desalting treatment of 95%, obtain the fresh water of the total dissolved solidss content specified lower than country's drinking water sanitary standard, the dense water of back flushing returns to first step capacitive deionization module, reuses.
2. a kind of brackish water desalination treatment process according to claim 1 and device thereof, it is characterised in that: the working pressure < 0.3MPa of first step capacitive deionization module and second stage capacitive deionization module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510997893.6A CN105621756A (en) | 2015-12-24 | 2015-12-24 | Brackish water desalination treatment method and device |
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| CN201510997893.6A CN105621756A (en) | 2015-12-24 | 2015-12-24 | Brackish water desalination treatment method and device |
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| CN105621756A true CN105621756A (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510997893.6A Pending CN105621756A (en) | 2015-12-24 | 2015-12-24 | Brackish water desalination treatment method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109205925A (en) * | 2017-07-07 | 2019-01-15 | 芜湖佳泽利环境资源科技有限公司 | A kind of Zero discharging system and discharge method of suitable high-salt wastewater |
| CN113417818A (en) * | 2021-07-29 | 2021-09-21 | 常州大学 | Power generation device and power generation method using brackish water to generate power |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070284313A1 (en) * | 2006-06-12 | 2007-12-13 | Jae Bong Lee | Submerged-type electrosorption-based water purification apparatus and method thereof |
| CN104926004A (en) * | 2015-06-19 | 2015-09-23 | 北京共创富来水处理设备有限公司 | Capacitive sea water desalting equipment and method based on direct-current electric field effect |
| CN104944647A (en) * | 2015-06-19 | 2015-09-30 | 北京共创富来水处理设备有限公司 | Capacitance type sewage and waste water treatment device and method based on action of direct current electric field |
-
2015
- 2015-12-24 CN CN201510997893.6A patent/CN105621756A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070284313A1 (en) * | 2006-06-12 | 2007-12-13 | Jae Bong Lee | Submerged-type electrosorption-based water purification apparatus and method thereof |
| CN104926004A (en) * | 2015-06-19 | 2015-09-23 | 北京共创富来水处理设备有限公司 | Capacitive sea water desalting equipment and method based on direct-current electric field effect |
| CN104944647A (en) * | 2015-06-19 | 2015-09-30 | 北京共创富来水处理设备有限公司 | Capacitance type sewage and waste water treatment device and method based on action of direct current electric field |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109205925A (en) * | 2017-07-07 | 2019-01-15 | 芜湖佳泽利环境资源科技有限公司 | A kind of Zero discharging system and discharge method of suitable high-salt wastewater |
| CN113417818A (en) * | 2021-07-29 | 2021-09-21 | 常州大学 | Power generation device and power generation method using brackish water to generate power |
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Application publication date: 20160601 |
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