CN106587462A - Treatment method for nanofiltration membrane central water purification system - Google Patents
Treatment method for nanofiltration membrane central water purification system Download PDFInfo
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- CN106587462A CN106587462A CN201611119283.7A CN201611119283A CN106587462A CN 106587462 A CN106587462 A CN 106587462A CN 201611119283 A CN201611119283 A CN 201611119283A CN 106587462 A CN106587462 A CN 106587462A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 217
- 239000012528 membrane Substances 0.000 title claims abstract description 100
- 238000001728 nano-filtration Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000000746 purification Methods 0.000 title abstract description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002131 composite material Substances 0.000 claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000003860 storage Methods 0.000 claims abstract description 7
- 239000006004 Quartz sand Substances 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 23
- 238000001914 filtration Methods 0.000 claims description 20
- 238000004062 sedimentation Methods 0.000 claims description 18
- 238000003672 processing method Methods 0.000 claims description 14
- 239000010453 quartz Substances 0.000 claims description 14
- 229920002647 polyamide Polymers 0.000 claims description 12
- 239000004952 Polyamide Substances 0.000 claims description 11
- 239000000047 product Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 229920000742 Cotton Polymers 0.000 claims description 9
- 239000002346 layers by function Substances 0.000 claims description 9
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 8
- 230000033228 biological regulation Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 230000002070 germicidal effect Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 239000004593 Epoxy Substances 0.000 claims description 4
- 238000012695 Interfacial polymerization Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 4
- 239000003610 charcoal Substances 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 125000000864 peroxy group Chemical group O(O*)* 0.000 claims description 4
- 231100000719 pollutant Toxicity 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000000844 anti-bacterial effect Effects 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 239000002957 persistent organic pollutant Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000009287 sand filtration Methods 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 2
- 239000000523 sample Substances 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052801 chlorine Inorganic materials 0.000 abstract description 7
- 239000000460 chlorine Substances 0.000 abstract description 7
- 230000004907 flux Effects 0.000 abstract description 5
- 230000001590 oxidative effect Effects 0.000 abstract description 4
- 230000001954 sterilising effect Effects 0.000 abstract 2
- 238000004659 sterilization and disinfection Methods 0.000 abstract 2
- 238000009298 carbon filtering Methods 0.000 abstract 1
- 238000011109 contamination Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 241000219146 Gossypium Species 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000001223 reverse osmosis Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L magnesium sulphate Substances [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 125000003368 amide group Chemical group 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000011033 desalting Methods 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 150000001263 acyl chlorides Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 210000004885 white matter Anatomy 0.000 description 1
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
- C02F1/283—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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
Abstract
The invention discloses a treatment method for a nanofiltration membrane central water purification system. A raw water tank is connected with a water inlet opening of a quartz sand filter through a raw water pump; a water outlet opening of the quartz sand filter is connected with an ozone contact tower; an ozone gas inlet opening formed in the bottom of the ozone contact tower is connected with an ozone generator through a high-pressure fan; a water outlet opening of the ozone contact tower is connected with a water inlet opening of an active carbon filter through a carbon filtering pump; a water outlet opening of the active carbon filter is connected with a middle water tank; a water outlet opening of the middle water tank is connected with a fine filter through a pressurizing pump; a water outlet opening of the fine filter conveys water into a nanofiltration membrane filter through a high-pressure pump; a water outlet opening of the nanofiltration membrane filter is provided with an ultraviolet sterilization lamp, and is connected with a finished product water storage tank through a water outlet pipeline of the ultraviolet sterilization lamp; two branch pipes are arranged at a concentrated water outlet of the nanofiltration membrane; the first branch pipe is connected with a concentrated water recycling device; and the second branch pipe is connected with a water inlet opening of the raw water pump. The treatment method has the advantages that the chlorine resistance and the oxidative resistance of the composite nanofiltration membrane are improved by 5 times or higher; the water flux of the composite nanofiltration membrane is improved by 20 to 50 percent; the contamination-resistant performance of the composite nanofiltration membrane is improved by two times or higher; and the water yield of the central water purification system is improved to 70 percent or higher.
Description
Technical field
The present invention relates to a kind of water treatment system and its processing method, are concretely that one kind is used for NF membrane Central water purification
The processing method of system, belongs to water-treatment technology field.
Background technology
NF membrane is also called low pressure reverse osmosis or loose reverse osmosis membrane, due to the density ratio reverse osmosis membrane of its surface layer
Density it is low, it is hereby achieved that the water flux more much higher than reverse osmosis membrane, while being more than to bivalence above ion and molecular weight
200 organic molecule has sufficiently high interception capacity, and its range of application is more and more wider.But, although polyamide-based nanofiltration is multiple
Close film and there is excellent desalting performance and water permeability energy, but in the presence of oxidative components, film properties drastically decline.Nearly 30
Nian Lai, Duo Jia research institution and transnational enterprise have carried out substantial amounts of work to improve its oxidation resistent susceptibility, but there is no so far prominent
Broken property progress and corresponding product come out.As SST companies of the U.S. adopt in AUS research report No.201370 for 2002
Penta 4 acyl chlorides of ring substitutes general pyromellitic trimethylsilyl chloride monomer, and gained composite membrane chlorine resistance is improved, but due to other performance
Cannot ensure, there is no product to come out；Dow Chemical are irrigated in US5876602 and epoch and are timed in the special of US2008/0203013
The chlorine-resistant oxidation resistent susceptibility for improving film is processed in profit using rear oxidation, but it has impact on the desalting performance of film, thus there is no product
Come out.Therefore strict pretreatment must be first passed through in NF membrane application process at present, this considerably increases the use of film into
This.Another major defect of NF membrane is that its anti-pollution ability is very weak, many potential pollutants, such as colloid, egg in raw water
Hard water ions of white matter, microorganism and easy fouling etc. easily cause the dirt of film and block up, and make film properties decay rapidly, and this will
Ask extra preprocessing process to remove these components as far as possible, this also increases the use cost of film.
In water treatment applications, cost ratio shared by the energy expenditure of the use cost of composite membrane and unit product water is higher,
Therefore since the industrialization eighties in last century so far, the use cost of composite membrane reduces and reduces using pressure or increase water and pass through
Rate is always the direction that industry is made great efforts, therefore, resistance to oxidation, anti-pollution high-flux nanofiltration membrane are developed into industry emphasis.
The content of the invention
The technical problem to be solved is the shortcoming for overcoming prior art, there is provided a kind of for NF membrane central authorities
The processing method of water cleaning systems, apparatus of the present invention clear principle reliability are cheap, implement simple, realize net to central authorities
The on-line monitoring of wetting system raw water, automatically controls concentrated water and reclaims reprocessing, have ecological, environmental protective meaning.
In order to solve above technical problem, the present invention provides a kind of processing system of NF membrane central water purifying system, including
Raw water box, quartz filter, ozone contact tower, active carbon filter, nano-filtration membrane filter and dense with nano-filtration membrane filter
The concentrated water recycle device that water out is connected, the raw water box are connected with the water inlet of quartz filter by raw water pump,
The quartz filter outlet is connected with the ozone contact tower, and the ozone inlet of the ozone contact tower bottom passes through
High pressure positive blower is connected with ozonator；The outlet Jing carbon filter pump of the ozone contact tower and the water inlet of active carbon filter
Be connected, the outlet of the active carbon filter is connected with intermediate water tank, the outlet of the intermediate water tank pass through force (forcing) pump and
Fine filter is connected, and the outlet of fine filter feeds the water into the nano-filtration membrane filter, the nano-filtration membrane filter by high-pressure pump
Outlet install ultraviolet germicidal, be connected with product water storage tank by the outlet pipeline of ultraviolet germicidal；The NF membrane
Concentrated water outlet be provided with two arms, the first arm is connected with concentrated water recycle device, the second arm and the raw water pump
Water inlet be connected；
Composite nanometer filtering film is provided with the nano-filtration membrane filter, the composite nanometer filtering film includes the supporting layer for stacking together and bottom
Film layer, the counterdie layer surface introduce peroxy or epoxy-based functional reactive group, and the support layer surface is introduced using logical
The composite polyamide ultrathin functional layer that interfacial polymerization techniques apply, by the macromolecule of the composite polyamide ultrathin functional layer
There is bonding action with the functional response group of counterdie layer surface in chain, realize that the supporting layer and basal membrane layer crosslinking are combined.
The further restriction technical scheme of the present invention：Concentrated water recycle device includes adjusting retort, sedimentation tank, many Jie
Mass filter, the second nano-filtration membrane filter and initial filter water tank, the regulation retort is provided with flocculant and PH regulators add
Medicine mouth, the outlet of the regulation retort are connected with the water inlet of sedimentation tank by water-delivery pump, and the bottom of the sedimentation tank sets
There is sediment discharge mouth, outlet Jing pipelines are provided with the middle part of the sedimentation tank and are connected with more medium filter, the multimedium mistake
The outlet of filter feeds the water into second nano-filtration membrane filter by the second high-pressure pump, second nano-filtration membrane filter
Outlet is connected with initial filter water tank, and the concentrated water outlet Jing pipelines of second nano-filtration membrane filter lead to described regulation and react
Tank, the cleaned pump of the initial filter water tank bottom outlet lead to second nano-filtration membrane filter, to clean the second NF membrane
Filter.
Filling PP cotton filter cores, the PP cottons in the processing system of aforesaid NF membrane central water purifying system, the fine filter
The aperture of filter element is 5-20 microns；The active carbon filter inner stuffing is active carbon loading silver filter element or hoary hair's sintering activity charcoal
Filter element.
The processing system of aforesaid NF membrane central water purifying system, the concentrated water water outlet of the NF membrane are provided with detection and visit
Head, judges the break-make of two arms of the concentrated water water outlet by control circuit.
The processing system of aforesaid NF membrane central water purifying system, the quartz filter are provided with anti-overflow loop
Pipe；The nano-filtration membrane filter is arranged in parallel by two NF membrane and is constituted.
A kind of processing method for NF membrane central water purifying system, concrete grammar are as follows：
Raw water pump is opened, the water in raw water box is squeezed into into quartz filter, remove the larger diameter solid impurity in raw water, Jing
Water after quartz sand filtration delivers to ozone contact tower, and water and ozone counter current contacting, remove Organic substance in water in the ozone contact tower,
The absorbability of consequent activities charcoal is improved, residual gas is emptied by ozone contact top of tower；
Through active carbon filter, the micro quantity organic pollutant in water is fallen in absorption to water Jing after the process of ozone contact tower, and stores
Keep in in intermediate water tank；
Water in intermediate water tank is pumped to fine filter by pressurization again, filters out the dust in water by the PP cotton filter cores in fine filter
And other coarse grained pollutant；Nano-filtration membrane filter filtration is fed the water into by high-pressure pump, obtained pure water is again by purple
Outer sterilizer lamp kills the antibacterial for wherein remaining, and finally sends into product water storage tank, and the concentrated water of generation is selected according to testing result
Flow direction, the relatively low water of concentration return raw water pump purified process again, and the high concentrated water of concentration sends into concentrated water recycle device；
Concentrated water enters concentrated water recycle device first adjusted retort, adds flocculant and PH regulators to pass through after being sufficiently stirred for
Water delivery is pumped into sedimentation tank precipitation, and water is sent Jing after more medium filter filtration by the supernatant of sedimentation tank by the second high-pressure pump
Enter the second nano-filtration membrane filter, the pure water of generation sends into initial filter water tank, and the concentrated water of generation is sent into and adjusts retort, initial filter water bottom
The cleaned pump of outlet in portion leads to the second nano-filtration membrane filter, to clean the second nano-filtration membrane filter.
A kind of new additive containing functional groups is introduced in the composite nanometer filtering film of the present invention, basal membrane layer is added to
Casting solution in, polysulfones counterdie layer surface Jing appropriate physical chemistry is processed so as to which surface introduces the work(such as peroxy, epoxy radicals
Energy property reactive group, then using general interfacial polymerization techniques composite polyamide ultrathin functional layer to support layer surface so that
The end group such as amido and carboxyl of amide groups and polyamide macromolecular chain in polyamide molecule and the reactive work(on counterdie surface
There is bonding action in energy group, so as to realize polyamide desalination functional layer and the interface-cross-linked structure of supporting layer, make Interface composites strong
Degree is greatly increased, and improves the chlorine-resistant oxidative resistance of composite nanometer filtering film；It is simultaneously on the basis of existing Technology, anti-in composite membrane-forming
Preferably go out the additive of uniqueness, control and optimization polyamide functional layer thickness, density and surface hydrophilicity and surface in answering system
Roughness etc., improves the water flux of existing Nano filtering composite membrane；Using specific manufacture technique, film surface roughness is reduced, improve film
Anti-fouling performance；Using high-performance NF membrane core processing technique, drinking water quality security risk end-of-pipe control technology with
On the basis of applied research, high-efficiency and energy-saving type dual water supplying system key technology and equipment industrialization, using PLC controls, realize
On-line monitoring to central water purifier raw water, automatically controls concentrate recirculation reprocessing, the producing water ratio of central water purifying system is carried
Up to more than 70%.
The invention has the beneficial effects as follows：
It is of the invention compared with existing water treatment system, have the characteristics that：（1）Improve the chlorine-resistant oxidative resistance 5 of composite nanometer filtering film
More than times；（2）The water flux of composite nanometer filtering film is improved into 20-50%；（3）By the anti-fouling performance of composite nanometer filtering film improve 2 times with
On；（4）The producing water ratio of central water purifying system is improved to more than 70%.
Description of the drawings
Process flow diagrams of the Fig. 1 for apparatus of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings
Embodiment 1
The present embodiment provides a kind of processing method for NF membrane central water purifying system, and structure is as shown in figure 1, including raw water box
1st, quartz filter 2, ozone contact tower 3, active carbon filter 4, nano-filtration membrane filter 5 and with nano-filtration membrane filter concentrated water
Filling PP cotton filter cores in the concentrated water recycle device that outlet is connected, fine filter, the aperture of PP cotton filter cores is 5-20 microns；Activity
Carbon filter inner stuffing is active carbon loading silver filter element, and quartz filter is provided with anti-overflow loop arm；Raw water box passes through
Raw water pump 6 is connected with the water inlet of quartz filter 2, and 2 outlet of quartz filter is connected with ozone contact tower 3, ozone
The ozone inlet of contact tower bottom is connected with ozonator 8 by high pressure positive blower 7；The outlet Jing carbon of ozone contact tower 3
Filter pump 9 is connected with the water inlet of active carbon filter 4, and the outlet of active carbon filter 4 is connected with intermediate water tank 10, middle water
The outlet of case 10 is connected with fine filter 12 by force (forcing) pump 11, and the outlet of fine filter 12 is fed the water into by high-pressure pump 13 to be received
Membrane filter 5, nano-filtration membrane filter are arranged in parallel by two NF membrane and are constituted；The outlet of nano-filtration membrane filter is installed ultraviolet
Germicidal lamp 14, is connected with product water storage tank 15 by the outlet pipeline of ultraviolet germicidal 14；The concentrated water outlet of NF membrane sets
There are two arms, the first arm is connected with concentrated water recycle device, and the second arm is connected with the water inlet of raw water pump, NF membrane
Concentrated water water outlet be provided with detection probe, the break-make of two arms of concentrated water water outlet is judged by control circuit；
Composite nanometer filtering film is provided with nano-filtration membrane filter, composite nanometer filtering film includes the supporting layer for stacking together and basal membrane layer, bottom
Film surface introduces peroxy or epoxy-based functional reactive group, and support layer surface is introduced using general interfacial polymerization techniques
The composite polyamide ultrathin functional layer of applying, by the function of the macromolecular chain and counterdie layer surface of composite polyamide ultrathin functional layer
Property reactive group occur bonding action, realize supporting layer and basal membrane layer crosslinking combine.
The concentrated water recycle device of the present embodiment include adjusting retort 16, sedimentation tank 17, more medium filter 18, the
Two nano-filtration membrane filters 19 and initial filter water tank 20, adjust retort 16 and are provided with flocculant and PH regulator dosing mouths, adjust
The outlet of retort 16 is connected with the water inlet of sedimentation tank 17 by water-delivery pump 21, and the bottom of sedimentation tank 17 is provided with precipitate row
Mouth is put, outlet Jing pipelines is provided with the middle part of sedimentation tank and is connected with more medium filter 18, the outlet of more medium filter 18 leads to
Cross the second high-pressure pump 22 and feed the water into the second nano-filtration membrane filter 19, outlet and the initial filter water tank 20 of the second nano-filtration membrane filter
It is connected, the concentrated water outlet Jing pipelines of the second nano-filtration membrane filter lead to regulation retort 16, initial filter water tank bottom outlet Jing
Cleaning pump 23 leads to the second nano-filtration membrane filter 19, to clean the second nano-filtration membrane filter.
The course of work of the present embodiment is as follows：
Raw water pump is opened, the water in raw water box is squeezed into into quartz filter, remove the larger diameter solid impurity in raw water, Jing
Water after quartz sand filtration delivers to ozone contact tower, and water and ozone counter current contacting, remove Organic substance in water in the ozone contact tower,
The absorbability of consequent activities charcoal is improved, residual gas is emptied by ozone contact top of tower；Water Jing after the process of ozone contact tower
Through active carbon filter, the micro quantity organic pollutant in water is fallen in absorption, and keeps in being stored into intermediate water tank；
Water in intermediate water tank is pumped to fine filter by pressurization again, filters out the dust in water by the PP cotton filter cores in fine filter
And other coarse grained pollutant；Nano-filtration membrane filter filtration is fed the water into by high-pressure pump, obtained pure water is again by purple
Outer sterilizer lamp kills the antibacterial for wherein remaining, and finally sends into product water storage tank, and the concentrated water of generation is selected according to testing result
Flow direction, the relatively low water of concentration return raw water pump purified process again, and the high concentrated water of concentration sends into concentrated water recycle device；
Concentrated water enters concentrated water recycle device first adjusted retort, adds flocculant and PH regulators to pass through after being sufficiently stirred for
Water delivery is pumped into sedimentation tank precipitation, and water is sent Jing after more medium filter filtration by the supernatant of sedimentation tank by the second high-pressure pump
Enter the second nano-filtration membrane filter, the pure water of generation sends into initial filter water tank, and the concentrated water of generation is sent into and adjusts retort, initial filter water bottom
The cleaned pump of outlet in portion leads to the second nano-filtration membrane filter, to clean the second nano-filtration membrane filter.
After testing, the present embodiment technical target of the product is as follows：
（1）High-performance composite nanometer filtering film：NaCl salt rejection rate >=80%, MgSO4Salt rejection rate >=90%, water flux >=1.5 ton/M2•
My god, chlorine resistance >=5000ppm h（(test condition：2000ppm NaCl/MgSO4, test pressure：50 psi）, chlorine resistance surpasses state
5 times of the general NF membrane level in border, 2 times of the super international NF membrane level of stain resistance.
（2）Water-saving Central water purification processing system producing water water quality reaches《Direct drinking water water standard》CJ94, producing water ratio are carried
Up to more than 70%.
Above example technological thought only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is every
According to technological thought proposed by the present invention, any change done on the basis of technical scheme, the scope of the present invention is each fallen within
Within.
Claims (8)
1. a kind of processing method for NF membrane central water purifying system, including raw water box, quartz filter, ozone contact
Tower, active carbon filter, nano-filtration membrane filter and the concentrated water recycle device being connected with the outlet of nano-filtration membrane filter concentrated water,
The raw water box is connected with the water inlet of quartz filter by raw water pump, and the quartz filter outlet is smelly with described
Oxygen contact tower is connected, and the ozone inlet of the ozone contact tower bottom is connected with ozonator by high pressure positive blower；It is described
The outlet Jing carbon filter pump of ozone contact tower is connected with the water inlet of active carbon filter, the outlet of the active carbon filter
It is connected with intermediate water tank, the outlet of the intermediate water tank is connected with fine filter by force (forcing) pump, and the outlet of fine filter passes through
High-pressure pump feeds the water into the nano-filtration membrane filter, and the outlet of the nano-filtration membrane filter installs ultraviolet germicidal, by purple
The outlet pipeline of outer germicidal lamp is connected with product water storage tank；The concentrated water outlet of the NF membrane is provided with two arms, and first
Arm is connected with concentrated water recycle device, and the second arm is connected with the water inlet of the raw water pump；It is characterized in that process side
Method is as follows：
Raw water pump is opened, the water in raw water box is squeezed into into quartz filter, remove the larger diameter solid impurity in raw water, Jing
Water after quartz sand filtration delivers to ozone contact tower, and water and ozone counter current contacting, remove Organic substance in water in the ozone contact tower,
The absorbability of consequent activities charcoal is improved, residual gas is emptied by ozone contact top of tower；
Through active carbon filter, the micro quantity organic pollutant in water is fallen in absorption to water Jing after the process of ozone contact tower, and stores
Keep in in intermediate water tank；
Water in intermediate water tank is pumped to fine filter by pressurization again, filters out the dust in water by the PP cotton filter cores in fine filter
And other coarse grained pollutant；Nano-filtration membrane filter filtration is fed the water into by high-pressure pump, obtained pure water is again by purple
Outer sterilizer lamp kills the antibacterial for wherein remaining, and finally sends into product water storage tank, and the concentrated water of generation is selected according to testing result
Flow direction, the relatively low water of concentration return raw water pump purified process again, and the high concentrated water of concentration sends into concentrated water recycle device；
Concentrated water enters concentrated water recycle device first adjusted retort, adds flocculant and PH regulators to pass through after being sufficiently stirred for
Water delivery is pumped into sedimentation tank precipitation, and water is sent Jing after more medium filter filtration by the supernatant of sedimentation tank by the second high-pressure pump
Enter the second nano-filtration membrane filter, the pure water of generation sends into initial filter water tank, and the concentrated water of generation is sent into and adjusts retort, initial filter water bottom
The cleaned pump of outlet in portion leads to the second nano-filtration membrane filter, to clean the second nano-filtration membrane filter.
2. the processing method for NF membrane central water purifying system according to claim 1, it is characterised in that the nanofiltration
Composite nanometer filtering film is provided with film filter, the composite nanometer filtering film includes the supporting layer for stacking together and basal membrane layer, the bottom
Film surface introduces peroxy or epoxy-based functional reactive group, and the support layer surface is introduced using general interfacial polymerization
The composite polyamide ultrathin functional layer that technology applies, by macromolecular chain and the basal membrane layer table of the composite polyamide ultrathin functional layer
There is bonding action in the functional response group in face, realize that the supporting layer and basal membrane layer crosslinking are combined.
3. the processing method for NF membrane central water purifying system according to claim 1, it is characterised in that the concentrated water
Recycle device includes adjusting retort, sedimentation tank, more medium filter, the second nano-filtration membrane filter and initial filter water tank,
The regulation retort is provided with flocculant and PH regulator dosing mouths, the outlet of the regulation retort by water-delivery pump with
The water inlet of sedimentation tank is connected, and the bottom of the sedimentation tank is provided with sediment discharge mouth, is provided with outlet in the middle part of the sedimentation tank
Jing pipelines are connected with more medium filter, and the outlet of the more medium filter feeds the water into described by the second high-pressure pump
Two nano-filtration membrane filters, the outlet of second nano-filtration membrane filter are connected with initial filter water tank, second nanofiltration membrane
The concentrated water outlet Jing pipelines of device lead to the regulation retort, and the cleaned pump of the initial filter water tank bottom outlet leads to described
Second nano-filtration membrane filter, to clean the second nano-filtration membrane filter.
4. the processing method for NF membrane central water purifying system according to claim 1, it is characterised in that the fine straining
Filling PP cotton filter cores in device, the aperture of the PP cotton filter cores is 5-20 microns.
5. the processing method for NF membrane central water purifying system according to claim 1, it is characterised in that the work
Property carbon filter inner stuffing be active carbon loading silver filter element or hoary hair's sintering activity carbon filtration core.
6. the processing method for NF membrane central water purifying system according to claim 1, it is characterised in that the nanofiltration
The concentrated water water outlet of film is provided with detection probe, judged by control circuit the concentrated water water outlet two arms it is logical
It is disconnected.
7. the processing method for NF membrane central water purifying system according to claim 1, it is characterised in that the quartz
Sand filter is provided with anti-overflow loop arm.
8. the processing method for NF membrane central water purifying system according to claim 1, it is characterised in that the nanofiltration
Film filter is arranged in parallel by two NF membrane and is constituted.
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| CN107986523A (en) * | 2017-11-22 | 2018-05-04 | 苏州雷沃克环保科技有限公司 | A kind of synthetic filter bactericidal purifying treatment process of industrial wastewater |
| CN109553229A (en) * | 2018-02-08 | 2019-04-02 | 佛山市雅洁源科技股份有限公司 | The wastewater treatment equipment that field is quickly laid |
| CN111732251A (en) * | 2020-08-25 | 2020-10-02 | 烟台市百事特消防科技有限公司 | Natural mineral water processing system |
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| WO2004113232A2 (en) * | 2003-06-26 | 2004-12-29 | Tersano Inc. | System and containers for water filtration and item sanitization |
| CN1769188A (en) * | 2004-11-02 | 2006-05-10 | 中国科学院生态环境研究中心 | Safe drinking water purification method and system |
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| CN107055725B (en) * | 2017-05-04 | 2020-07-03 | 贵州黔成电器制造有限公司 | Integrated water purifying device |
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