Sea water nanofiltration desalination method and device

A technology of nanofiltration and seawater, which is applied in seawater treatment, general water supply saving, osmosis/dialysis water/sewage treatment, etc. It can solve the problems of low water recovery rate, large pretreatment equipment, and large energy consumption, so as to reduce production The effect of reducing cost, reducing operating pressure and improving recovery rate

Inactive Publication Date: 2007-07-11
陈益棠 +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned seawater desalination processes are all seawater desalination methods based on the reverse osmosis membrane process. The disadvantages are low recovery rate of produced water, high energy consumption, large pretreatment equipment, complicated treatment process, high cost of seawater desalination, and the comprehensive Difficult to use

Method used

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  • Sea water nanofiltration desalination method and device

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Comparison scheme
Effect test

Embodiment 1

[0037] With reference to accompanying drawing 1, a kind of nanofiltration seawater desalination device comprises raw water tank 1, booster pump body 2, ultrafiltration preprocessor 3, intermediate water tank 4, backwash pump body 5, high-pressure pump body I6, nanofilter I7, Nanofilter II8, regulating water tank 9, high-pressure pump body II10, desalter I11, high-pressure pump body III12, and desalter II13 are connected in sequence.

[0038]The outlet of the raw water tank 1 is connected to the inlet of the booster pump body 2, the outlet of the booster pump body 2 is connected to the inlet of the ultrafiltration preprocessor 3, and the water produced by the ultrafiltration preprocessor 3 flows into the intermediate water tank 4 from the outlet , the outlet of the intermediate water tank 4 is connected to the inlet of the high-pressure pump body I6, the outlet of the high-pressure pump body I6 is connected to the inlet of the nanofilter I7, the concentrated water outlet of the ...

Embodiment 2

[0045] With reference to accompanying drawing 2, a kind of nanofiltration seawater desalination device comprises raw water tank 1, booster pump body 2, ultrafiltration preprocessor 3, intermediate water tank 4, backwash pump body 5, high pressure pump body I6, nanofilter I7 , nanofilter II8, regulating water tank 9, high-pressure pump body II10, desalter I11, etc. are connected in sequence. The outlet of the raw water tank 1 is connected to the inlet of the booster pump body 2, the outlet of the booster pump body 2 is connected to the inlet of the ultrafiltration preprocessor 3, and the water produced by the ultrafiltration preprocessor 3 flows into the intermediate water tank 4 from the outlet , the outlet of the intermediate water tank 4 is connected to the inlet of the high-pressure pump body I6, the outlet of the high-pressure pump body I6 is connected to the inlet of the nanofilter I7, the concentrated water outlet of the nanofilter I7 is connected to the inlet of the nano...

Embodiment 3

[0052] Referring to accompanying drawing 3, a nanofiltration seawater desalination device, the difference between this embodiment and the first embodiment is that only one nanofilter is used, and the rest of the components and connections are the same as the first embodiment.

[0053] Adopt the device of embodiment three to carry out the processing method of nanofiltration seawater desalination, its flow process is carried out in the following order successively: seawater is pumped into ultrafiltration preprocessor 3 from raw water tank 1 through booster pump body 2, passes through ultrafiltration preprocessor The clean seawater from 3 enters the intermediate water tank 4 by gravity; the clean seawater in the intermediate water tank 4 is pumped into the nanofilter I7 by the high-pressure pump body I6, and the concentrated seawater from the nanofilter I7 is directly discharged. The concentrated seawater contains calcium, magnesium, Sulfate and other divalent ions and some sodium...

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Abstract

The invention discloses a seawater desalinating method, which comprises the following steps: hyperfiltering; nanofiltering; desalinizing. The device comprises the following parts: raw water tank, booster pump, hyperfiltering preprocessor, middle tank, high-pressure pump I, nanofiltering element, adjusting tank, at least one desalinization unit and recoil washing pump, wherein the water inlet of recoil washing pump connects middle tank and the outlet connects the water outlet of hyperfiltering predisposer.

Description

technical field [0001] The invention relates to a nanofiltration seawater desalination method and a device thereof. Background technique [0002] Desalination of seawater is a high-tech that obtains fresh water from the ocean, and it has been widely used and developed all over the world. Seawater is a brine solution with high salt content, high hardness, large turbidity changes, and suspended organic and inorganic particles and microorganisms of different particle sizes. Therefore, the desalination process of seawater is a rather complicated desalination process. Traditional seawater desalination methods can be divided into thermal methods and membrane methods according to the principle of desalination. Seawater desalination methods such as multi-stage flash evaporation and low-temperature multi-effect distillation are thermal desalination. Seawater is heated and converted into steam, which is then condensed and converted into fresh water. Due to the phase change in the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F103/08
CPCY02A20/131
Inventor 陈益棠戴良辉
Owner 陈益棠
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