CN109279727A - A method of shunting recycling concentrated water moisture in desalination water purification process - Google Patents
A method of shunting recycling concentrated water moisture in desalination water purification process Download PDFInfo
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- CN109279727A CN109279727A CN201811462690.7A CN201811462690A CN109279727A CN 109279727 A CN109279727 A CN 109279727A CN 201811462690 A CN201811462690 A CN 201811462690A CN 109279727 A CN109279727 A CN 109279727A
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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
- C02F1/28—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
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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
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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
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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
- C02F1/4604—Treatment of water, waste water, or sewage by electrochemical methods for desalination of seawater or brackish water
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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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
A method of it shunting recycling concentrated water moisture in desalination water purification process, is related to water treatment field.First concentrated water of generation is delivered to electro-desalting unit and is further processed, recycled to moisture therein by this method after film desalting processing.Moisture a part of recycling is transmitted back to normal pressure water-supply-pipe and is mixed with raw water, then is delivered to the processing of film desalination unit via booster pump;Another part is incorporated in the first water purification after being transported to the processing of the second film desalination unit, is recycled by user, the ratio of shunting can be adjusted flexibly according to the hydrostatic pressure of the first film desalination unit.This method is easy to operate, not high to equipment requirement, by adding electro-desalting step, will be increased to 90% or more to the utilization rate of water in entire desalination processes, achievees the purpose that save water resource.
Description
Technical field
The present invention relates to water treatment fields, shunt recycling concentrated water water in desalination water purification process in particular to one kind
The method divided.
Background technique
With the development of the society, the improvement of people's living standards, the health that people drink water for itself diet is also increasingly
Pay attention to.Currently, tap water all uses chloridising to handle, water can be effectively prevent to spread the disease, but contain salt, miscellaneous in tap water
Matter and chlorine residue etc., do not have the condition directly drunk, and need purified treatment again before consumption.
In the prior art, tap water is purified frequently with reverse osmosis membrane, to produce the pure water that can directly drink.
Reverse osmosis membrane can effectively prevent the substances such as bacterium, virus, scale, salt ion, only hydrone be allowed to pass through, to guarantee to use water
Safety.And during processing, bacterium, virus, scale, salt ion etc. do not form concentrated water then by the substance of reverse osmosis membrane
Discharge.The volume ratio of currently used reverse osmosis membrane, the concentrated water and pure water that generate in purification is 1:3 or so, is in other words had
1/4 water is slatterned as concentrated water, not high to the utilization rate of water.
Summary of the invention
The method that the purpose of the present invention is to provide a kind of to shunt recycling concentrated water moisture in desalination water purification process, can
It is for further processing to concentrated water, recycles moisture therein, improve the utilization rate to water, achieve the purpose that economize on resources.
The embodiment of the present invention is achieved in that
A method of shunting recycling concentrated water moisture in desalination water purification process comprising:
It by raw water after booster pump is pressurized, is delivered in the first film desalination unit, carries out film desalting processing, obtain saliferous
Measure the first relatively low water purification of relatively high the first concentrated water and salt content;
First concentrated water is delivered in electro-desalting unit, electro-desalting processing is carried out, obtains relatively high super dense of salt content
Water and the relatively low recyclable water of salt content;
The input terminal that the recyclable water in part is delivered to booster pump is mixed with raw water;Remaining part can be recycled water and be delivered to the
In two film desalination units, film desalting processing is carried out, the second relatively high concentrated water of salt content is obtained and salt content is relatively low
The second water purification;
First water purification and the second water purification are merged.
The beneficial effect of the embodiment of the present invention is:
The method that the embodiment of the invention provides a kind of to shunt recycling concentrated water moisture in desalination water purification process.This method exists
After film desalting processing, the first concentrated water of generation is delivered to electro-desalting unit and is further processed, moisture therein is recycled.
Moisture a part of recycling is transmitted back to normal pressure water-supply-pipe and is mixed with raw water, then is delivered at film desalination unit via booster pump
Reason;Another part is incorporated in the first water purification after being transported to the processing of the second film desalination unit, is recycled by user, the ratio of shunting
Example can be adjusted flexibly according to the hydrostatic pressure of the first film desalination unit.This method is easy to operate, not to equipment requirement
Height will be increased to 90% or more to the utilization rate of water in entire desalination processes by adding electro-desalting step, reaches and saves water money
The purpose in source.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the schematic diagram of the circulating household water purifier in part provided by the embodiment of the present invention.
Icon: the circulating household water purifier in the part 100-;110- booster pump;120- the first film desalination unit;130- electricity
Desalination unit;140- the second film desalination unit;151- normal pressure water-supply-pipe;152- high pressure water transport pipe;153- outlet pipe;154- reflux
Pipeline;155- concentrated water discharge pipe.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
In addition, to keep the purposes, technical schemes and advantages of embodiment of the present invention clearer, below in conjunction with the present invention
Attached drawing in embodiment is clearly and completely described the technical solution in embodiment of the present invention, it is clear that described
Embodiment be some embodiments of the invention, rather than whole embodiment.Based on the embodiment in the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts belongs to this
Invent the range of protection.Therefore, below the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit
The range of claimed invention processed, but it is merely representative of selected embodiment of the invention.Based on the implementation in the present invention
Mode, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral;It can be mechanical connect
It connects, is also possible to be electrically connected;It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Have below to a kind of method for shunting recycling concentrated water moisture in desalination water purification process of the embodiment of the present invention
Body explanation.
The method that the embodiment of the invention provides a kind of to shunt recycling concentrated water moisture in desalination water purification process comprising:
It by raw water after booster pump is pressurized, is delivered in the first film desalination unit, carries out film desalting processing, obtain saliferous
Measure the first relatively low water purification of relatively high the first concentrated water and salt content;
First concentrated water is delivered in electro-desalting unit, electro-desalting processing is carried out, obtains relatively high super dense of salt content
Water and the relatively low recyclable water of salt content;
The input terminal that the recyclable water in part is delivered to booster pump is mixed with raw water;Remaining part can be recycled water and be delivered to the
In two film desalination units, film desalting processing is carried out, the second relatively high concentrated water of salt content is obtained and salt content is relatively low
The second water purification;
First water purification and the second water purification are merged.
In the prior art, the desalting ability (i.e. salt rejection rate) of film desalination unit, the selection depending on reverse osmosis membrane.It is existing
The volume ratio of concentrated water and pure water that reverse osmosis membrane is generated in purification is 1:3 or so, in other words has 1/4 water unrestrained as concentrated water
Expense is fallen, not high to the utilization rate of water.In view of this, present inventor introduces electricity creatively after film desalting processing
Desalting processing step recycles the moisture in concentrated water.For film desalination unit, electro-desalting unit can be by changing
Become its voltage, to adjust salt rejection rate, so as to the requirement according to user for water quality, to change the dynamics to moisture recycling,
The rate of recovery can be increased to 90% or more by highest, achieve the purpose that save water resource.
Further, the application carries out the recycling of moisture by two approach;Moisture a part of recycling is conveyed
It returns normal pressure water-supply-pipe to mix with raw water, then is delivered to the processing of film desalination unit via booster pump;Another part is transported to second
It is incorporated in the first water purification, is recycled by user, the ratio of shunting can be according to the first film desalination list after the processing of film desalination unit
Member hydrostatic pressure and be adjusted flexibly.Under normal conditions, carrying out secondary film de-salting operation using the first film desalination unit is
It, can be to avoid bring energy loss when the operation of the second film desalination unit and mechanical loss than scheme preferably.But work as
User's water consumption is increased sharply, then can be by by the production of electro-desalting unit when the first film desalination unit faces biggish desalination pressure
Water section is fully incorporated into the second film desalination unit, to alleviate the pressure of the first film desalination unit.
Further, the first film desalination unit includes any one of nano filter membrance device and reverse osmosis membrane apparatus.Second film
Desalination unit includes any one of nano filter membrance device and reverse osmosis membrane apparatus.Electro-desalting unit includes electrodialysis plant and capacitor
Any one of device desalter;Preferably, electrodialysis plant includes pole-reversing electroosmosis device.
Further, the input terminal flow of booster pump is 1~10L/min.To guarantee there is better desalting effect, raw water
Input quantity should not be too large.Invention is found by itself creative work, when by flow control within the above range, the effect of desalination
Preferably.
Further, the input end pressure of the first film desalination unit is 60~150psi.If the first film desalination unit is defeated
Enter that end pressure is excessive, then influence whether the working efficiency of reverse osmosis membrane, reduces desalting effect.Meanwhile pressure it is excessive when also may be used
Hidden danger for security can be brought.
Preferably, electro-desalting unit output end pressure is 0~5 kilogram.The output end pressure of electro-desalting unit determines that this can
Recycle-water reflux efficiency, when its pressure within the above range when, the operation is stable.
Preferably, raw water first passes through the filtering of PP cotton and active carbon filtering, then is delivered to booster pump pressurization.In practical operation
Cheng Zhong can add PP cotton filter device and active carbon filtering device before booster pump, allow raw water successively to pass through PP cotton and filter
Device and active carbon filtering device come to contained by it impurity and chlorine residue etc. be filtered.
Preferably, the first water purification of the first film desalination unit output and the second water purification of the second film desalination unit output merge
Afterwards, it is filtered by active carbon, then is delivered to and is delivered to after active carbon filters with water terminal with water terminal.In practical operation
Cheng Zhong can add active carbon filtering device in the first film desalination unit and between water terminal, allow the first water purification and second net
Water is delivered to again by active carbon filtering device with water terminal, the further water safety for ensureing user.
Further, the first concentrated water of the first film desalination unit output was after adding antisludging agent, then was delivered to electro-desalting
Unit.Specifically, antisludging agent tank can be added between the first film desalination unit and electro-desalting unit, allows the first film desalination unit
The first concentrated water generated takes away the part antisludging agent in antisludging agent tank, then be delivered in electro-desalting unit by antisludging agent tank.This
Outside, Dropping feeder can also be used, the antisludging agent of liquid is directly added drop-wise to the mode in water flow to carry out.Antisludging agent can have
Effect inhibits the generation of scale, extends the service life of equipment.Preferably, antisludging agent includes acid, Si-P crystal, organic inhibitor agent etc..
Acid can be organic acid (such as citric acid) or inorganic acid (such as hydrochloric acid), and organic inhibitor agent includes poly-aspartate, organic phosphoric acid
Salt etc..
Optionally, the above-mentioned method that recycling concentrated water moisture is shunted in desalination water purification process can use as shown in Figure 1
A kind of circulating household water purifier 100 in part comprising booster pump 110, the first film desalination unit 120, electro-desalting unit
130 and the second film desalination unit 140.
Wherein, the input terminal of booster pump 110 is connected to by normal pressure water-supply-pipe 151 with raw water source.In general, raw water source is
Municipal tap water, it is not limited to municipal tap water, is also possible to other water sources.Booster pump 110 is for increasing raw water
Pressure, and it is delivered to the first film desalination unit 120.
Further, the first film desalination unit 120 includes any one of nano filter membrance device and reverse osmosis membrane apparatus.Specifically
Ground, the first film desalination unit 120 have the first water inlet, the outlet of the first concentrated water and the first production water out.First water inlet is logical
It crosses high pressure water transport pipe 152 to be connected to the output end of booster pump 110, first produces water out connects by outlet pipe 153 and with water terminal
It is logical.Pressurized water is entered in the first film desalination unit 120, by film desalination by high pressure water transport pipe 152 through the first water inlet
After processing, the first water purification and the first concentrated water are obtained, the first water purification produces water out by first, is delivered to user's through outlet pipe 153
With water terminal, such as tap etc..The first concentrated water generated is then delivered to electro-desalting unit 130 by the outlet of the first concentrated water and does into one
Step processing.
Optionally, electro-desalting unit 130 includes any one of electrodialysis plant and capacitor desalter;Preferably,
Electrodialysis plant includes pole-reversing electroosmosis device.Specifically, electro-desalting unit 130 have the second water inlet, the second concentrated water outlet,
And second produce water out.First concentrated water outlet of the second water inlet and the first film desalination unit 120, the outlet of the second concentrated water
It is connected to concentrated water discharge pipe 155.It is controlled by valve, the second production water out can choose defeated by reflux line 154 and normal pressure
Water pipe 151 is connected to, and also be can choose and is connected to the second film desalination unit 140, or is connected to simultaneously with the two.Gone out by the first concentrated water
First concentrated water of mouth discharge is entered in electro-desalting unit 130 by the second water inlet, is handled by electro-desalting, and salt content is generated
Lower recyclable water and the higher super concentrated water of salt content.Recyclable water produces water out discharge by second, according to specific feelings
Condition, selection flow back into normal pressure water-supply-pipe 151 by reflux line 154 and mix with raw water, be delivered to again via booster pump 110
Film desalting processing is carried out in first film desalination unit 120.Or it is delivered to progress film desalting processing in the second film desalination unit 140
It can be incorporated into outlet pipe 153 afterwards, to be recycled by user.
Second film desalination unit 140 includes any one of nano filter membrance device and reverse osmosis membrane apparatus.Specifically, the second film
There is desalination unit 140 third water inlet, the outlet of third concentrated water and third to produce water out.Third water inlet leads to and electro-desalting
The second of unit 130 produces water out connection, and third produces water out and is connected to outlet pipe 153, the outlet of third concentrated water and concentrated water discharge
Pipe 155 is connected to.The lower recyclable water of salt content for producing water out output by second, enters the second film by third water inlet and takes off
In salt unit 140, after further film desalting processing, the second water purification and the second concentrated water are obtained, the second water purification is produced by third
Water out is incorporated into outlet pipe 153, and is delivered to being recycled with water terminal for user.The second concentrated water generated is then by the
Three concentrated waters outlet discharge is incorporated into concentrated water discharge pipe 155.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
Present embodiments provide a kind of method that recycling concentrated water moisture is shunted in desalination water purification process comprising:
S1. it by raw water after booster pump is pressurized, is delivered in the first film desalination unit, carries out film desalting processing, obtain
The first relatively high concentrated water of salt content and relatively low the first water purification of salt content.Wherein, the flow of raw water is 5L/
Min, the input end pressure of the first film desalination unit are 80psi.Producing water flow is 1.8L/min.
S2. the first water purification is delivered to for users to use, while the first concentrated water being delivered to electro-desalting list in water terminal
In member, electro-desalting processing is carried out, obtains the relatively high super concentrated water of salt content and the relatively low recyclable water of salt content.
Wherein, the pressure of electro-desalting unit output end is 2 kilograms.Super concentrated water flow is 150mL/min.
S3. super concentrated water discharge is handled, the input terminal that the recyclable water in part is delivered to booster pump is mixed with raw water, it is remaining
Part can be recycled water and be delivered in the second film desalination unit, carry out film desalting processing, obtain relatively high second dense of salt content
Water and relatively low the second water purification of salt content.
S4. the second concentrated water is merged into super concentrated water and is discharged, be delivered to after the second water purification is merged with the first water purification and use water
Terminal.
Through detecting, using present embodiments provide it is a kind of in desalination water purification process shunt recycling concentrated water moisture method,
The rate of recovery to water is 91%~93%.
Embodiment 2
Present embodiments provide a kind of method that recycling concentrated water moisture is shunted in desalination water purification process comprising:
S1., raw water is successively passed through to the filtering of PP cotton, active carbon filtering, is pressurized using booster pump, and be delivered to the first film
In desalination unit, carry out film desalting processing, obtain the first relatively high concentrated water of salt content and salt content it is relatively low the
One water purification.Wherein, the flow of raw water is 8L/min, and the input end pressure of the first film desalination unit is 120psi.Producing water flow is
2.5L/min.
S2. the first water purification is delivered to after active carbon filters in water terminal for users to use, while by the first concentrated water
It is delivered in electro-desalting unit, carries out electro-desalting processing, obtain the relatively high super concentrated water of salt content and salt content relatively
Low recyclable water.Wherein, the pressure of electro-desalting unit output end is 2 kilograms.Super concentrated water flow is 230mL/min.
S3. super concentrated water discharge is handled, the input terminal that the recyclable water in part is delivered to booster pump is mixed with raw water, it is remaining
Lower part can be recycled water be delivered in the second film desalination unit, carry out film desalting processing, obtain salt content it is relatively high second
Concentrated water and relatively low the second water purification of salt content.
S4. the second concentrated water is merged into super concentrated water and is discharged, the second water purification is merged with the first water purification, is filtered through active carbon
After be delivered to water terminal.
Through detecting, using present embodiments provide it is a kind of in desalination water purification process shunt recycling concentrated water moisture method,
The rate of recovery to water is 90~92%.
The side for recycling concentrated water moisture is shunted in desalination water purification process in conclusion the embodiment of the invention provides a kind of
Method.First concentrated water of generation is delivered to electro-desalting unit and is further processed, to water therein by this method after film desalting processing
Divide and is recycled.Moisture a part of recycling is transmitted back to normal pressure water-supply-pipe and is mixed with raw water, then is delivered to film via booster pump
Desalination unit processing;Another part is incorporated in the first water purification after being transported to the processing of the second film desalination unit, recycles benefit by user
With the ratio of shunting can be adjusted flexibly according to the hydrostatic pressure of the first film desalination unit.This method is easy to operate, right
Equipment requirement is not high, by adding electro-desalting step, will be increased to 90% or more to the utilization rate of water in entire desalination processes, reaches
To the purpose for saving water resource.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of method for shunting recycling concentrated water moisture in desalination water purification process characterized by comprising
It by raw water after booster pump is pressurized, is delivered in the first film desalination unit, carries out film desalting processing, obtain salt content phase
First water purification relatively low to higher first concentrated water and salt content;
First concentrated water is delivered in electro-desalting unit, electro-desalting processing is carried out, obtains relatively high super dense of salt content
Water and the relatively low recyclable water of salt content;
The input terminal that the part recyclable water is delivered to the booster pump is mixed with the raw water;It can be returned described in remaining part
It receives water to be delivered in the second film desalination unit, carries out film desalting processing, obtain the second relatively high concentrated water of salt content, Yi Jihan
The second relatively low water purification of salt amount;
Second water purification is merged with first water purification.
2. the method according to claim 1, wherein the first film desalination unit includes nano filter membrance device and anti-
Any one of permeable membrane device;The second film desalination unit includes any in nano filter membrance device and reverse osmosis membrane apparatus
Kind.
3. the method according to claim 1, wherein the electro-desalting unit includes electrodialysis plant and capacitor
Any one of desalter;Preferably, the electrodialysis plant includes pole-reversing electroosmosis device.
4. the method according to claim 1, wherein the input terminal flow of the booster pump is 1~10L/min.
5. according to the method described in claim 4, it is characterized in that, the input end pressure of the first film desalination unit be 60~
120psi。
6. according to the method described in claim 5, it is characterized in that, the electro-desalting unit output end pressure is 1~5 kilogram.
7. it is filtered the method according to claim 1, wherein the raw water first passes through the filtering of PP cotton and active carbon,
It is delivered to the booster pump pressurization again.
8. the method according to the description of claim 7 is characterized in that first water purification of the first film desalination unit output
After second water purification with the second film desalination unit output merges, filtered by active carbon, then be delivered to water terminal.
9. the method according to claim 1, wherein first concentrated water of the first film desalination unit output
After adding antisludging agent, then it is delivered to the electro-desalting unit.
10. according to the method described in claim 9, it is characterized in that, the antisludging agent includes acid, Si-P crystal and organic inhibitor agent
At least one of;Preferably, the acid includes at least one of organic acid and inorganic acid;The organic inhibitor agent includes poly-
At least one of aspartic acid and organic phosphate.
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