CN105712445A - Pretreatment device for deep purification of municipal tap water - Google Patents
Pretreatment device for deep purification of municipal tap water Download PDFInfo
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- CN105712445A CN105712445A CN201610221614.1A CN201610221614A CN105712445A CN 105712445 A CN105712445 A CN 105712445A CN 201610221614 A CN201610221614 A CN 201610221614A CN 105712445 A CN105712445 A CN 105712445A
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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
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/34—Polyvinylidene fluoride
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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
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
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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
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/46115—Electrolytic cell with membranes or diaphragms
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Abstract
The invention relates to a pretreatment device for deep purification of municipal tap water. The pretreatment device comprises negative and positive electrodes in pairs, an electrolysis power supply for supplying power to the electrodes and a water container, wherein a water inlet and a water outlet are arranged on the water container; two pairs of the electrodes in pairs are arranged and include a first electrode pair and a second electrode pair, a first water-pervious diaphragm is arranged between the negative electrode and the positive electrode of the first electrode pair, a second water-pervious diaphragm is arranged between the negative electrode and the positive electrode of the second electrode pair, the first water-pervious diaphragm and the second water-pervious diaphragm separate the positive electrode of the first electrode pair and the negative electrode of the second electrode pair from the water container, the negative electrode of the first electrode pair and the positive electrode of the second electrode pair are located in the water container and are directly contacted with water in the water container, and the positive electrode of the first electrode pair and the negative electrode of the second electrode pair are only contacted with seepage water of the water container. The device can deactivate bacteria in source water, degrade organic matters in the source water and reduce hardness of the source water.
Description
Technical field
The present invention relates to a kind of pretreatment unit for deep purifying city for tap water, belong to the water quality advanced processing technology field of Drinking Water.
Background technology
Water pollutes the pollutant mainly produced by mankind's activity to be caused, and it includes industrial pollution source, agricultural pollution source and domestic pollution source three parts.Increasingly the water aggravated pollutes, and the living safety of the mankind is constituted significant threat, becomes the major obstacles of human health, economy and social sustainable development.Investigating according to authoritative institution of the world, annual at least cause global 200d 00,000 people dead because drinking unhygienic water, therefore, water pollution is referred to as " world's number one killer ".
Current people generally using tap water as drinking water, but domestic and international most of waterworks still adopts the outmoded process of precipitation, filtration, chlorination so far, and river or subsoil water are simply processed into drinkable water.But, in the face of trade effluent, rural sewage and sanitary sewage wildness are spread unchecked and poured in life water source, waterworks can't bear the heavy load helpless.Adding tap water and arrive, through water transfer pipe network and high-rise storage tank, the additional pollution that drinking water terminal is brought from water factory, municipal tap water dare not say it is health.Especially, although tap water chlorination can effectively kill except pathogenic bacteria, but also can produce more halogenated hydrocarbon compound simultaneously, the content of these chlorinated organics is multiplied, it it is the significant source causing the mankind to suffer from various disease, even boiling tap water, what above-mentioned residue still drove does not go, and the carcinogens such as nitrite and chloroform also can be made to increase.That is, even if being also not high with municipal tap water for the safety coefficient of the drinking water of source water.
In daily life, drinking water needs often has at times, intermittent feature.Such as, family's three meals water and bathing peak are concentrated mainly on time morning, noon and afternoon；Wash water is then by all/time calculating.Drinking water storage device in daily life, logical refers to the drinking water terminal with storage tank (tank, container), for instance: 1) pipeline water cleaning systems end wall on-hook, desk-top or vertical drinking；2) RO water purification machine water outlet pressure store bucket (case), and watered glass for drinking, kettle；3) elevated tank that public supply mains skyscraper top layer is installed, even urban residents' groundwater abstraction is to the water tank on roof.The common problem that such system exists at present is that in storage tank, in water, bacterial micro-organism exceeds standard, and has a strong impact on water quality even abnormal flavour smelly.The solution that there is no so far.
Since directly drinking public water supply is difficult to ensure safety, water purifier arises at the historic moment, and becomes common people's hard requirement.But, existing with city for tap water be source water purification of water quality product or drinking water related product, essentially medium absorption or adopt various bore filter film that water pollutant is intercepted the physical treatment technology filtered.Owing to activated carbon class adsorbing material is easy to saturated inefficacy, and various filter membrane is easy to be contaminated by bacterial or Organic substance blocks or damaged, and therefore practical situation is can not accomplish water pollutant as desired by Design Theory sufficiently cleaned up.In the face of day by day serious source water pollutes, existing physics mode processes technique and far from can guarantee that water quality reaching standard.It addition, traditional RO membrane reverse osmosis filter method is very serious to the waste of water resource, often purifies 1 liter of pure water and be accomplished by discharging 3 liters of concentration waste water.But, physics mode water treatment technology also has its points of course: generally do not generate toxic byproduct.
Comparatively speaking, though Water Treatment technique has the plurality of advantages such as cheap simply efficient, and it is unsuitable for civilian terminal Drinking Water field.Trace it to its cause, one is that Water Treatment technique needs enough response time, and in daily life water occasion, and water purifier is from start water inlet to water outlet only several seconds or even shorter, pollutant time of staying in water purifier is too short, has had little time related chemistry reaction treatment at all；It two is that Water Treatment technique is generally with certain toxic and side effects.Such as, although chemical oxidation reaction can potent inactivation of bacterial, depth degradation Organic substance, remove the various harmful substances in water, but all kinds of Strong oxdiative factors that chemical oxidization method generates are substantially non-selectivity, uncontrollable, generating, if dealing with improperly, the novel substance even strong carcinogen not having in the water of source most probably, jeopardizing safe drinking water on the contrary.And reduction reaction controls the improper Similar Problems that also brings along, for instance nitrate is likely to be converted into strong carcinogen nitrite；Just because of this, process occasion at common people's daily life drink water purifying, taboo be can be described as the application of Water Treatment technique not deep and double cautious.
Applicant finds through long-term experiment and actual practice, comparatively speaking, electrochemistry is as a kind of advanced oxidation water treatment technology, it is known as " 21 century green technology ", attached poison seondary effect is little far beyond conventional chemical water treatment technology, and electrochemistry water treatment technology can be carried out intensive treatment intensity by the adjustment of electrical quantity and reduce the response time.Therefore, electrochemical water treatment technology should be overcome physics water treatment technology weakness, can be used for the first-selection of Drinking Water purified treatment.
But, electrochemical nature still belonging to chemical treatment technology, even toxic and side effects is little again, still has the risk of the Biological indicators reduction making water, such as anode reaction can produce have the chlorate of strong oxidizing property, hypochlorite etc. and H in water2O2、O3Deng carcinogen.In today that the unprecedented severe contamination of water environment, conventional physical water purifier are unable to do what one wishes, again the probability that close examination research Water Treatment especially electrochemical water treatment technology is applied in Drinking Water purified treatment, a kind of electrochemical treatments technique that can efficiently remove water pollutant, again non-toxic by-products of innovative development or even electrochemistry water treatment technology work in coordination with brand-new method for purifying water and the device of coupling with physisorptive filter technique, are of great practical significance.
Summary of the invention
Present invention solves the technical problem that and be: propose a kind of purification city pretreatment unit for tap water inactivateing antibacterial in the water of source, source of degradation Organic substance in water and source hardness of water can being reduced.
In order to solve above-mentioned technical problem, the technical scheme that the present invention proposes is: a kind of pretreatment unit for deep purifying city for tap water, including the paired electrode of negative and positive, for the electrolysis power of described electrode power supply and water container, described water container is provided with water inlet and outlet；Described paired electrode has two pairs, the first electrode respectively to the second electrode pair, the first water penetration barrier film it is provided with between the yin, yang electrode of described first electrode pair, being provided with the second water penetration barrier film between the yin, yang electrode of described second electrode pair, described first, second water penetration barrier film is all the water penetration barrier film that non-conducting material is made；The anelectrode of the first electrode pair and water container are separated by described first water penetration barrier film, and the negative electrode of the second electrode pair and water container are separated by described second water penetration barrier film；In use, the negative electrode of described first electrode pair all directly contacts with the water in water container with the anelectrode of the second electrode pair, the anelectrode of described first electrode pair is only contacted with the infiltration water oozed out by described first water penetration barrier film in water container, and the negative electrode of described second electrode pair is only contacted with the infiltration water oozed out by described second water penetration barrier film in water container.
It should be noted that, apparatus of the present invention process to seeming city for tap water, as described in the background art, present water pollutes day by day serious, city has become as a kind of micro-polluted water (or perhaps special contamination water) for tap water, its polluter includes environmental pollution (such as pesticide residues etc.), chlorination produces pollution and pipeline secondary pollution etc..
Working mechanism and the beneficial effect of technical scheme disclosed in the invention described above are presented below.
The architectural feature of the present invention is, described water container is with first, second water penetration barrier film for boundary, and described first electrode is to setting up separately in the first water penetration barrier film both sides, and the negative electrode of described first electrode pair is in water container, and its anelectrode is outside water container；Described second electrode is to setting up separately in the second water penetration barrier film both sides, and the anelectrode of described second electrode pair is in water container, and its negative electrode is outside water container.Certainly, as water container inside is provided with cavity, the first or second water penetration barrier film is arranged on cavity housing, then the negative electrode of the second electrode pair being arranged in cavity or the anelectrode of the first electrode pair are considered as being arranged on outside water container.
1) first for the first electrode to, the anelectrode of the first electrode pair only contacts (anelectrode does not directly contact with the water of water container) with the infiltration water penetrating through the first water penetration barrier film in water container, anode direct oxidation reaction is transferred to and carries out outside water container, reaction product of anode is drained outside container, will not return again to container internal contamination water quality.Meanwhile, negative pollutant such as chlorine residue, the various harmful anions etc. in water, by anode voltage effect, it is also possible to through the first water penetration barrier film water in container, moves to water container outer with infiltration water discharge.
In the present invention, the structure of the first water penetration barrier film shows as the aquaporin region excessively of countless permeable micropore on microcosmic, owing to the first water penetration barrier film is that non-conductive material is made, thus produce voltage drop in aquaporin in crossing of permeable micropore, namely after putting on external electrode (anelectrode) and interior electrode (negative electrode) when the decomposition voltage of electrolysis power, form following voltage landing relation: the outer anelectrode of the first water penetration barrier film (+) the voltage drop U3 of the anti-generation of water resistance between negative electrode in pressure drop U2 → the first water penetration barrier film that between → anelectrode and the first water penetration barrier film, the voltage drop U1 of moisture film → water penetration barrier film direct impedance produces and water container.
And liberation of hydrogen during water electrolysis, the gas that oxygen evolution reaction generates easily enters crossing in aquaporin and generating bubble in the water crossed in aquaporin of permeable micropore, in the narrow and small environment crossed in aquaporin of the permeable micropore of the first water penetration barrier film, bubble is easy to broken thus producing localized hyperthermia's high pressure, and then inspire efficient water body plasma discharge with minimum voltage, in the first water penetration barrier film and in the first water penetration barrier film neighboring area water, (plasma is and solid-state the plasma of generation hydroxyl free base class transient state oxidation factor, liquid, gaseous state is in material the 4th state of same level, low temperature plasma is rich in electronics, ion, free radical and excited state molecule, electronics and ion have significantly high reactivity, the chemical reaction being difficult under usual conditions or speed is difficult to can be made to become very rapid, plasma group is generated by water body electric discharge, can be greatly improved in water body the degradation efficiency of pollutant), the oxidisability of this hydroxyl radical free radical transient state oxidation factor is extremely strong (exceeding ozone), the existence time in water is extremely short again simultaneously, therefore after rapidly the pollutant such as Organic substance in water (such as antibacterial) can being formed extremely strong Degradation self rapid oxidation after generation, direct-reduction is water, do not stay any toxic and side effects.
2) the second electrode pair with the first electrode to similar, but voltage landing in opposite direction.Therefore same, in the present invention, the negative electrode of the second electrode pair contacts with the infiltration water of the second water penetration barrier film and is to ensure that the cell reaction of the second electrode pair is normally carried out, second water penetration barrier film is also made for non-conducting material, therefore can also produce the hydroxyl free base class transient state oxidation factor of a large amount of strong sterilizing ability.
Simultaneously, under the effect of the second electrode pair, the metal cation etc. such as calcium ions and magnesium ions in the endogenous water of water container, ferrimanganic continues to precipitate out, and discharges through the second water penetration barrier film, making hardness of water continuous decrease in water container, in the water of source, harmful heavy metal etc. are progressively removed；And based on the direct oxidation effect of the anelectrode of the second electrode pair in water container, the microorganism in the water of source is inactivated, and Organic substance is degraded.
3) negative electrode of the first electrode pair and the anelectrode equivalence of the second electrode pair constitute the 3rd group of electrode to (without barrier film between yin, yang electrode), make the microorganism in the water of source be inactivated under its electric field action, it is possible to the electrochemical purification of better performance.
In summary, first the present invention is by calcium ions and magnesium ions in the water of source, the chlorate of ferrimanganic and strong oxidizing property, hypochlorite is discharged from water container, and by hydroxyl free base class transient state oxidation factor, source water is sterilized and organic matter degradation, thus obtaining relatively pure water, can as the front end of existing physical absorption-filtering and purifying water device (such as traditional RO membrane reverse osmosis filtering and purifying water device or absorbent charcoal adsorber etc.), (toxic byproduct is only a small amount of H can to remove a small amount of toxic byproduct easily by the physical absorption of existing physical cleaning water device or filter2O2And O3, H2O2And O3Half life of decomposition be usually no more than half an hour, not only the filter assemblies of rear end or absorbent module will not be produced harmful effect, and filter assembly or absorbent module can be carried out sterilizing), thus obtaining the scrubbing water of the degree of depth.
Secondly; the present invention is as the front end of existing physical absorption-filtering and purifying water device; can significantly alleviate the workload of membrane filtration module or absorbent module; protection physics filter assemblies or physical absorption assembly etc.; thus significantly extending the service life of the clean water-purifying apparatus of physical absorption-filter, reach the effect (the scrubbing water water quality of long service life and generation is good) taken stopgap measures and effect a permanent cure.
Finally, owing to first, second water penetration barrier film obtains the clamping protection of paired electrode in the present invention, it have been experienced that, first, second water penetration barrier film in use will not be scrapped because of premature failure such as damaged or obstructions, remains reliable and stable duty；Even if occasionally having fouling at first, second water penetration barrier film and electrode surface is also scum loosely, electrolytic process is suitably switched the decomposition voltage polarity of the paired electrode being applied to first, second water penetration barrier film both sides, it is possible to remove the deposition fouling at electrode and water penetration membrane surface of the anions and canons precipitate easily.
The present invention is when implementing; can also be according to actual needs; the polarity of two electrodes pair is regularly swung to; now electric pressure can also differ, so that first, second water penetration barrier film replaces degradation of organic substances, discharges harmful heavy metal ions, or discharges residual chlorine residue, various harmful anions etc.; so not only can improve the quality of scrubbing water further; give full play to electrochemical purification, and first, second water penetration barrier film can be protected, extend its service life.
It addition, in order to improve plasma discharge characteristic in film further, it is possible to make described first, second water penetration barrier film all adopt hydrophilic water penetration barrier film.Hydrophilic film surface can form hydrogen bond ordered structure with water, it is possible to improves fenestra water-filling wet face state, is conducive to plasma discharge process in film to be performed continuously over.
Preferably, size and the shape of the permeable micropore of described first water penetration barrier film are essentially identical, and size and the shape of the permeable micropore of described second water penetration barrier film are also essentially identical.
In the present invention, it is equivalent to and in a disguised form increases electrode diameter (electrode curvature radius) if the aperture of the permeable micropore of first, second water penetration barrier film is excessive and cause the initial excitation voltage of discharge in water to increase, and make generation bubble volume become to reduce greatly the catalytic specific surface area of gas-liquid two-phase.And the aperture of the permeable micropore of first, second water penetration barrier film if too small (namely the permeable aperture of micropore is too small), plasma discharge the gas that electrolysis produces can be made to cannot be introduced into the aperture (also just cannot produce bubble) of permeable micropore, so that cannot be normally carried out.Therefore, through the repetition test of inventor, it is determined that the pore diameter range of the permeable micropore of first, second water penetration barrier film is less than 2 millimeters and more than 1 nanometer, and the aperture size of permeable micropore differs each other each other less than 20%.
It addition, the uniformity of the shape uniformity of membrane micropore and pore size, plasma discharge impact in film is very big, therefore heretofore described first water penetration barrier film and the preferred each permeable micropore in use of the second water penetration barrier film are respectively formed plasma discharge.So when using electric discharge, direction of an electric field between anodic-cathodic can pass through the plasma group of each permeable micropore, all mistake in aquaporin that plasma discharge is directed to water penetration barrier film carries out, thus water body plasma discharge can be inspired with minimum voltage, water generates the transient state oxidation factor of a large amount of great sterilizing ability, can be greatly improved in water body the degradation efficiency of pollutant, better carry out sterilizing etc..
Improving further of technique scheme is: the outside of described water container is provided with the housing surrounding water container bottom, the closing space of the negative electrode of anelectrode and the second electrode pair surrounding the first electrode pair is formed between described housing, water container, the first water penetration barrier film and the second water penetration barrier film, described housing is provided with opening, and described opening forms the water inlet of described water container；The bottom of described housing is provided with sewage draining exit.
So, the filtration that city passes through first, second water penetration barrier film for tap water source water from exocoel enters water container, water pollutant is intercepted at exocoel, in water container, water is the scrubbing water through membrane filtration, afterwards the sewage in exocoel is emptied, such that it is able to improve treatment effeciency and treatment effect.
Improving further of technique scheme is: described electrolysis power is the direct current pulse power source of high level narrow spaces or the forward voltage level component pulse-changing power more than backward voltage level.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the structural representation of the embodiment of the present invention one.
Fig. 2 is the structural representation of the embodiment of the present invention two.
Detailed description of the invention
Embodiment one
The pretreatment unit supplying tap water for deep purifying city of the present embodiment, referring to Fig. 1, including the paired electrode of yin, yang, for the electrolysis power 2 of electrode power supply and water container 1, water container 1 is provided with water inlet 1-1 and outlet 1-2, city injects water container 1 for tap water from water inlet 1-1, outlet 1-2 can be connected with the water inlet of existing RO membrane reverse osmosis water filter, thus providing preposition pretreatment for RO membrane reverse osmosis water filter.It is of course also possible to be connect other physical absorptions or membrane filtration formula water purifier.
Paired electrode has two pairs, the first electrode respectively to the second electrode pair, the first water penetration barrier film 5-1 it is provided with between yin, yang electrode 3-1,3-2 of first electrode pair, the second water penetration barrier film 5-2 it is provided with between yin, yang electrode 4-1,4-2 of second electrode pair, the sidewall that water container 1 is relative offers first window and the second window respectively, first water penetration barrier film 5-1 completely covers and is laid on first window, and the second water penetration barrier film 5-2 completely covers and is laid on the second window；The anelectrode 3-2 of the first electrode pair and negative electrode 3-1 is respectively arranged on water container 1 outwardly and inwardly, and the anelectrode 4-2 of the second electrode pair and negative electrode 4-1 is respectively arranged on the inside and outside of water container 1.
First, second water penetration barrier film 5-1,5-2 of the present embodiment all adopts the monolayer nanofiltration membrane film that non-conductive material is made.
In use, water in water container 1 is oozed out by the first water penetration barrier film 5-1 and the second water penetration barrier film 5-2, and it is clamped with water membrane respectively between the first water penetration barrier film 5-1 and the anelectrode 3-2 of the first electrode pair and between the second water penetration barrier film 5-2 and the negative electrode 4-1 of the second electrode pair, namely the negative electrode 3-1 of the first electrode pair and the anelectrode 4-2 of the second electrode pair all directly contacts with the water in water container 1, the anelectrode 3-2 of the first electrode pair is only contacted by the first water penetration barrier film 5-1 infiltration water oozed out with in water container 1, the negative electrode 4-1 of the second electrode pair is only contacted by the second water penetration barrier film 5-2 infiltration water oozed out with in water container 1.So, can not only ensure that the cell reaction of the present embodiment device is normally carried out, also reduce the reaction on the anelectrode 3-2 of the first electrode pair and the negative electrode 4-1 of the second electrode pair of the source water electrolysis especially.
First, second water penetration barrier film 5-1, 5-2 is clamped between negative electrode and anelectrode, (the direct oxidation of such as anode under electrochemical action, indirect oxidation, cathodic reduction reaction), to the antibacterial in water, microorganism, Organic substance etc., play fabulous inactivation, degraded, convert (poisonous transfer to nontoxic) effect, therefore antibacterial is thoroughly inactivated, Organic substance then tends to being degraded to carbon dioxide and water, so not only to source advanced water treatment, and to first, second water penetration barrier film 5-1, 5-2 plays fabulous protection, substantially improve germ contamination and concentration polarization, the useful life making barrier film is greatly prolonged.Test examination proves, in apparatus of the present invention, first, second water penetration barrier film 5-1,5-2 remains reliable and stable duty, even if occasionally having fouling at first, second water penetration barrier film and electrode surface is also scum loosely.
Improvement as the present embodiment, so that plasma better discharges in film, first water penetration barrier film 5-1 and the second water penetration barrier film 5-2 is respectively provided with the permeable micropore (namely the pore size of the permeable micropore of the first water penetration barrier film and shape are essentially identical, and pore size and the shape of the permeable micropore of the second water penetration barrier film are also essentially identical) of uniform pore size.Preferably, the pore diameter range of the permeable micropore of first, second water penetration barrier film 5-1,5-2 is less than 2 millimeters and more than 1 nanometer, and the aperture size of the permeable micropore of first, second water penetration barrier film 5-1,5-2 differs each other each other less than 20%.
Permeable micropore for uniform pore size, it is possible to by being modified preparing to it, in the present embodiment, first, second water penetration barrier film 5-1,5-2 preferably employs the barrier film by making according to following steps:
1) by nanometer titanium dioxide titanium solution the ultraviolet case internal irradiation that temperature is 40 DEG C-60 DEG C 10-30 minute；
2) by the raw material component film liquid of following mass ratio:
PVDF:20%-30%
Porogen: 2-5%
Nano titanium oxide after step 1) irradiation: 2%-4%
Surfactant: 3%-5%
Solvent: 70%-80%；
3) the film liquid configured is passed through supersonic oscillations 20-40 minute；
4) spread to liquid film with knifing machine, liquid film is stood in atmosphere the 10-30 second, is then immersed in solidification liquid and is frozen into water penetration barrier film；
5) described barrier film is soak 10-40 minute in 10% alcohol water blend in concentration, is then placed in deionized water and rinses；
6) described barrier film is placed in the pure water tank being applied with 10kv DC pulse high pressure and processes 1 hour.
By the present embodiment, source water is sterilized and organic matter degradation, residual chlorine residue and various harmful anion migrate to anode, pass the first water penetration barrier film 5-1 and discharge, the metal cation such as calcium ions and magnesium ions, ferrimanganic etc. continues to precipitate out, discharge through the second water penetration barrier film 5-2, thus reducing hardness of water.The present embodiment can thoroughly inactivate antibacterial in the water of source, efficient degradation source Organic substance in water and can reduce source hardness of water.And H a small amount of in water2O2And O3Removed by RO membrane reverse osmosis water filter, obtain the pure water of deep purifying, so not only can alleviate the workload of RO film, and the H in water2O2And O3RO film can be carried out sterilizing.
The present embodiment is in electrolytic process, between the both sides yin, yang electrode of first, second water penetration barrier film, generate hydrogen and oxygen escapes up, produce certain air supporting flocculation, accelerating to precipitate out the float such as ion in water container in water to assemble agglomerating and precipitate, deposit buildup is in the bottom of water container.Sewage draining exit can be set in the bottom of water container, regularly discharge the accumulation flocculate in bottom.
The present embodiment carries out electro-chemical water and processes produced redox materials, generally includes following a few class: (1) has the chlorate of strong oxidizing property, hypochlorite etc.；And chlorate, hypochlorite have elecrtonegativity, it is possible to easily pass through described first water penetration barrier film and discharge, decrease toxic byproduct；(2) H2O2、O3The Strong oxdiative factors such as (standard electrode EMF 2.07, half-life 30-60min), has effect of sterilization, degradation of organic substances；(3) metal cation etc. such as the calcium ions and magnesium ions in the water of source, ferrimanganic continues to precipitate out, and discharges through the second water penetration barrier film, thus reducing source hardness of water；(4) electrochemical reaction produces strong oxidizing property and life-span extremely short intermediate, including e (solvated electron), OH, HO2·、·O2Deng free radical, based on OH, it is possible to degradation of organic substances.OH has high activity, is degraded to CO mainly through approach such as electron transfer, electrophilic addition, dehydrogenation reactions without selectively direct and various organic compound effects2, H2O and other innocuous substances.It has the following characteristics that 1) oxidability is strong, and its standard electrode EMF reaches 2.80V, is the extremely strong oxidant of a kind of oxidability；2) reaction rate constant is big, and OH is very active, and the speed constant reacted with most of Organic substances is at 106～1010mol-1 L s-1；3) selectivity is low, and unrelated with reactant concentration；4) life-span is short, and in different surrounding mediums, it exists the time certain difference, is generally less than 10-4s, only 10-9s in liquid phase；5) treatment effeciency is high, does not produce secondary pollution.
The present embodiment can also do following improvement:
1) electrolysis power 2 is the direct current pulse power source of high level narrow spaces or the forward voltage level component pulse-changing power more than backward voltage level.
2) water container 1 closes container for pressure-bearing.
3) preferred, the first water penetration barrier film and the second water penetration barrier film each permeable micropore in use is respectively formed plasma discharge.So can as much as possible in water generate hydroxyl free base class transient state oxidation factor plasma, better carry out sterilizing etc..
It is further to note that the anelectrode of the present embodiment the first electrode pair in use and the first water penetration barrier film are likely to clamping water membrane, it is likely between the two by permeating water spot contact or face contact；The negative electrode of the second electrode pair is also same setting with the second water penetration barrier film.
Embodiment two
The present embodiment is the improvement on embodiment one basis, it is different in that with embodiment one: as shown in Figure 2, in the present embodiment, the outside of water container 1 is provided with the housing 20 surrounding water container 1 bottom, the closing space of the negative electrode 4-1 of anelectrode 3-2 and the second electrode pair surrounding the first electrode pair is formed between housing 20, water container the 1, first water penetration barrier film 5-1 and the second water penetration barrier film 5-2, housing 1 is provided with opening 20-1, and this opening 20-1 forms the water inlet of water container 1；The bottom of housing is provided with sewage draining exit 20-2.
In use, city enters water container 1 by opening 20-1 through closing space the filtration through first, second water penetration barrier film 5-1,5-2 for tap water source water, water pollutant is intercepted in closing space, in water container 1, water is the scrubbing water after membrane filtration, afterwards, by the sewage draining exit 20-2 sewage emptying that will close in space, then start electrolytic process.Other guide is essentially identical with embodiment one.
As improvement, first, second water penetration barrier film 5-1,5-2 adopts hydrophilic water penetration barrier film.
The present invention supplies the pretreatment unit of tap water to be not limited to the concrete technical scheme described in above-described embodiment for deep purifying city, for instance the technical scheme of each embodiment above-mentioned of the present invention combined crosswise can form new technical scheme each other, etc..All employings are equal to the technical scheme replacing formation and are the protection domain of application claims.
Claims (8)
1., for deep purifying city for the pretreatment unit of tap water, including the paired electrode of negative and positive, for the electrolysis power of described electrode power supply and water container, described water container is provided with water inlet and outlet；It is characterized in that: described paired electrode has two pairs, the first electrode respectively to the second electrode pair, it is provided with the first water penetration barrier film that non-conducting material is made between the yin, yang electrode of described first electrode pair, between the yin, yang electrode of described second electrode pair, is provided with the second water penetration barrier film that non-conducting material is made；The anelectrode of the first electrode pair and water container are separated by described first water penetration barrier film, and the negative electrode of the second electrode pair and water container are separated by described second water penetration barrier film；In use, the negative electrode of described first electrode pair all directly contacts with the water in water container with the anelectrode of the second electrode pair, the anelectrode of described first electrode pair is only contacted with the infiltration water oozed out by described first water penetration barrier film in water container, and the negative electrode of described second electrode pair is only contacted with the infiltration water oozed out by described second water penetration barrier film in water container.
2. the pretreatment unit of tap water is supplied according to claim 1 for deep purifying city, it is characterized in that: size and the shape of the permeable micropore of described first water penetration barrier film are essentially identical, size and the shape of the permeable micropore of described second water penetration barrier film are also essentially identical.
3. the pretreatment unit for deep purifying city for tap water according to claim 1, it is characterised in that: described first, second water penetration barrier film is hydrophilic water penetration barrier film.
4. the arbitrary described pretreatment unit supplying tap water for deep purifying city according to claim 1-3, it is characterized in that: the pore diameter range of the permeable micropore of described first, second water penetration barrier film is 2 millimeters～1 nanometer, and the aperture of permeable micropore differs each other each other less than 20%.
5. the arbitrary described pretreatment unit supplying tap water for deep purifying city according to claim 1-3, it is characterized in that: the outside of described water container is provided with the housing surrounding water container bottom, the closing space of the negative electrode of anelectrode and the second electrode pair surrounding the first electrode pair is formed between described housing, water container, the first water penetration barrier film and the second water penetration barrier film, described housing is provided with opening, and described opening forms the water inlet of described water container；The bottom of described housing is provided with sewage draining exit.
6. the arbitrary described pretreatment unit for deep purifying city for tap water according to claim 1-3, it is characterised in that: described electrolysis power is the direct current pulse power source of high level narrow spaces or the forward voltage level component pulse-changing power more than backward voltage level.
7. the arbitrary described pretreatment unit supplying tap water for deep purifying city according to claim 1-3, it is characterised in that: in use, each permeable micropore of described first water penetration barrier film and the second water penetration barrier film is respectively formed plasma discharge.
8. the arbitrary described pretreatment unit supplying tap water for deep purifying city according to claim 1-3, it is characterised in that described water penetration barrier film is the barrier film by making according to following steps:
1) by nanometer titanium dioxide titanium solution the ultraviolet case internal irradiation that temperature is 40 DEG C-60 DEG C 10-30 minute；
2) by the raw material component film liquid of following mass ratio:
PVDF:20%-30%
Porogen: 2-5%
Nano titanium oxide after step 1) irradiation: 2%-4%
Surfactant: 3%-5%
Solvent: 70%-80%；
3) the film liquid configured is passed through supersonic oscillations 20-40 minute；
4) spread to liquid film with knifing machine, liquid film is stood in atmosphere the 10-30 second, is then immersed in solidification liquid and is frozen into barrier film；
5) described barrier film is soak 10-40 minute in 10% alcohol water blend in concentration, is then placed in deionized water and rinses；
6) described barrier film is placed in the pure water tank being applied with 10kv DC pulse high pressure and processes 1 hour.
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| CN2015106038416 | 2015-09-20 | ||
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| CN201610221614.1A Active CN105712445B (en) | 2015-09-20 | 2016-04-08 | For deep purifying city for the pretreatment unit of tap water |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107720892A (en) * | 2017-09-27 | 2018-02-23 | 大连理工大学 | A kind of capacitive deionization module and its application in sterilizing |
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| CN205527896U (en) * | 2015-09-20 | 2016-08-31 | 大连双迪创新科技研究院有限公司 | A preprocessing device for deep purification municipality confession running water |
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| CN103951118A (en) * | 2014-04-12 | 2014-07-30 | 大连双迪科技股份有限公司 | Business water machine |
| CN205527896U (en) * | 2015-09-20 | 2016-08-31 | 大连双迪创新科技研究院有限公司 | A preprocessing device for deep purification municipality confession running water |
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| JP2008080216A (en) * | 2006-09-26 | 2008-04-10 | Matsushita Electric Works Ltd | Apparatus for producing electrolytic water |
| CN103936109A (en) * | 2014-04-12 | 2014-07-23 | 大连双迪创新科技研究院有限公司 | Drinking water electrolysis preparation device |
| CN103951118A (en) * | 2014-04-12 | 2014-07-30 | 大连双迪科技股份有限公司 | Business water machine |
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| CN205527896U (en) | 2016-08-31 |
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