CN105692976B - Simple desk type water dispenser - Google Patents

Abstract

The present invention relates to a kind of simple desk type water dispenser, which includes electrolysis cells and membrane filter unit；The electrolysis power and water tank that the electrolysis cells include at least a pair of of anodic-cathodic, power for the anodic-cathodic, are equipped with water penetration diaphragm made of non-conductive material between pairs of negative electrode and positive electrode；The water tank is equipped with the first water inlet and the first water outlet, and the water penetration diaphragm separates the positive electrode with water tank, and the negative electrode is located in water tank；The membrane filter unit is equipped with the second water inlet and the second water outlet, and first water outlet is connected to the second water inlet；When in use, the negative electrode is in direct contact with the water in the water tank, and the positive electrode only contacts to make to be clamped with water membrane between the positive electrode and water penetration diaphragm with the infiltration water that the water tank is oozed out by water penetration diaphragm.The water dispenser not only can efficiently remove the bacterium in source water pollutant, thoroughly inactivation source water, and it is long not will produce toxic byproduct, work service life.

Description

Simple desk type water dispenser

Technical field

The present invention relates to a kind of simple desk type water dispensers, belong to drinking water terminal water treatment technical field.

Background technology

Currently, water environment is exacerbated, and the safe and healthy Frequent Accidents of drinking water quality seriously jeopardize the existence of people.Water The pollutant that pollution is mainly generated by mankind's activity causes, it includes industrial pollution source, agricultural pollution source and domestic pollution source Three parts.Increasingly the water pollution aggravated, to the living safety of the mankind constitute significant threat, become human health, economy and The major obstacles of social sustainable development.It is investigated according to authoritative institution of the world, every year the whole world caused by drinking unhygienic water at least 20000000 people are dead, and therefore, water pollution is referred to as " world's number one killer ".

Domestic and international most of waterworks are so far still using precipitating, filtering, the outmoded process of chlorination, by rivers Water or underground water are simply processed into drinkable water.However, spreading unchecked and pouring in face of trade effluent, rural sewage and sanitary sewage wildness Life water source, waterworks can't bear the heavy load helpless.Along with tap water from water factory through water transfer pipe network and high-rise water storage Case reaches and adds pollution caused by drinking water terminal, and it is health that municipal tap water dare not have been said.Especially, tap water adds Although chlorine can be killed effectively except germ, also will produce more halogenated hydrocarbon compound simultaneously, the contents of these chlorinated organics at Increase again, is the significant source for causing the mankind to suffer from various diseases.Even boiling tap water, above-mentioned residue still drive no It goes, the carcinogenic substances such as nitrite and chloroform can also increased.Also that is, even if the safety coefficient of drinking water is also not high 's.

Existing purification of water quality product or drinking water related product, predominantly medium adsorb or will be in water using the filter membrane in various apertures Nuisance intercepted the physics mode treatment process filtered out.Since activated carbon class sorbing material is easy to saturation failure, and Various filter membranes are easy to be contaminated by bacterial again or organic matter obstruction or damaged, thus actual conditions be can not be such as Theoretical Design It is desired to accomplish like that the sufficiently cleaned up of water pollutant.At the source water pollution of getting worse, existing physics mode Science and engineering skill far can not ensure water quality reaching standard.But physics mode water treatment technology also has an advantage in that, will not exactly generate Toxic byproduct.Therefore the water quality of traditional RO membrane reverse osmosis filter methods production is the safest, but is exchanged for the generation that ensures safety Valence is then up to the even more converse concentrated waters of 40%-70% and is wasted be discharged into sewer pipe, cause huge water resource and Waste of energy, and the cost replaced after the blocking of RO films is very high.To reduce or even reach no effuent discharge, water resource is saved, Various patented technologies are had been developed that so far.It is used for example, converse concentrated water is stored it, or by the pollutant in concentrated water first through molecular sieve Deng circulating and recovering after filtering, or adjustment waste water ratio, or cleaning blowing time is reduced by electrical control, or it is direct through non-return valve It returns and is diluted in tap water main line, or with " the double water of double films " pattern, water quality based water utilization, etc..The common deficiency of these technologies, one It is not consider from overall system design, only the single measure in part, often makes system overall work unbalance；The second is not considering From starting with into water condition for membrane component is improved, mitigate the live load of membrane component, it may be said that it is " palliative ", so so far The product that yet there are no real utility goods comes out.

In comparison, it is a kind of excellent height although Water Treatment technique has cheap many advantages, such as being simple and efficient Grade oxidation technology, but there are a series of problems for electrochemical treatments itself, should not handle occasion list in civilian terminal Drinking Water It solely uses, so far there is not yet in daily life water treatment field and closes extensive use.To find out its cause, one is Water Treatment technique The enough reaction time is needed, and in daily life water occasion, only several seconds, pollutant exist water purifier from be switched on to being discharged The residence time is too short in water purifier, has little time to complete related chemistry reaction treatment at all；The second is have can for Water Treatment technique It can be with certain toxic side effect.For example, although chemical oxidation reaction technique can potent inactivation of bacterial, depth degradation organic matter, Go water removal in various harmful substances, but all kinds of Strong oxdiative factors that chemical oxidization method is generated be substantially non-selectivity, can not Control, if dealing with the novel substance not having in most probably generating source water improperly, jeopardize safe drinking water instead；Just because of this, in the people Many daily life drink water purifyings handle occasion, the application of Water Treatment technique can be described as double cautious.

However, today unable to do what one wishes in the unprecedented serious pollution of water environment, conventional physical water purifier, examines closely again The possibility that concern Water Treatment is applied in Drinking Water purified treatment, it is ensured that people's life drinking water quality safety has Highly important realistic meaning.

Invention content

The invention solves technical problems to be：A kind of reliable operation is provided and service life is long, and in effective degradation water Substantially the water dispenser of toxic byproduct is not generated in middle organic matter, inactivation water while bacterium.

In order to solve the above-mentioned technical problem, technical solution proposed by the present invention is：A kind of simple desk type water dispenser, including electricity Solve unit and membrane filter unit；The electrolysis that the electrolysis cells include at least a pair of of anodic-cathodic, power for the anodic-cathodic Power supply and water tank are equipped with water penetration diaphragm made of non-conducting material between pairs of negative electrode and positive electrode；On the water tank Equipped with the first water inlet and the first water outlet, the water penetration diaphragm separates the positive electrode with water tank, the negative electrode position In in water tank；The membrane filter unit is equipped with the second water inlet and the second water outlet, first water outlet and the second water inlet Connection；When in use, the negative electrode is in direct contact with the water in the water tank, and the positive electrode only passes through with the water tank saturating The infiltration water contact of aqueous diaphragm exudation.

It should be noted that the present invention handle to seeming city for tap water, as described in the background art, present water is dirty Getting worse is contaminated, city has become a kind of micro-polluted water for tap water（Special contamination water in other words）, pollution sources include ring It pollutes in border（Such as pesticide residue）, the pollution that generates of chlorination and pipeline secondary pollution etc..

The preferred micro-filtrate membrane filtration unit of heretofore described membrane filter unit, ultrafiltration membrance filter unit or nanofiltration membrane list Member.

Preferably, the gap between the water penetration diaphragm and positive electrode is arranged right below pollution discharge pond.

The working mechanism of the present invention and the advantageous effect brought are presented below：

The water tank is boundary with water penetration diaphragm, and pairs of negative electrode and positive electrode set up separately in water penetration diaphragm both sides, The negative electrode is in water tank, and the positive electrode is outside water tank.Certainly, as water tank is internally provided with cavity, the setting of water penetration diaphragm On cavity shell, then the positive electrode in cavity is set and is considered as setting outside water tank.

Heretofore described positive electrode is only contacted with the infiltration water for penetrating through water penetration diaphragm in water tank（Positive electrode not with The water of water tank is in direct contact）, anode direct oxidation reaction is transferred to outside water tank and is carried out, reaction product of anode is arranged outside container It walks, will not return again to and pollute water quality in container.Meanwhile the negative pollutant in water is such as chlorine residue, various harmful anions, by Positive electricity pole tension acts on, and water penetration diaphragm can also be penetrated from water in container, and it is outer with infiltration water discharge to move to water tank.

Therefore, the various zwitterions in the water of source pass through during cell reaction out of water tank the present invention when in use Water penetration diaphragm is moved to and is exhausted outside water tank.And the zwitterion in water is the TDS for constituting water（That is dissolvability solid amount）'s Principal element, under electrolysis, the zwitterion in water mainly penetrates the interelectrode water penetration diaphragm of yin, yang with efflux wastewater Discharge, in this way, the TDS of Water in Water Tanks is just reduced, the TDS to maintain water in system does not have compared to city for water supply water There is notable raising.By taking DaLian, China area as an example, city is 100 ~ 150mg/L for the TDS of tap water, and concentrates efflux wastewater TDS is up to 14000mg/L.

The structure of water penetration diaphragm shows as the water passage region of countless permeable micropores on microcosmic in the present invention, due to Water penetration diaphragm is made of non-conductive material, thus voltage drop is generated in the water passage of permeable micropore, i.e., when electrolysis electricity The decomposition voltage in source is applied to external electrode（Positive electrode）With interior electrode（Negative electrode）Afterwards, following voltage landing relationship is formed：Thoroughly The outer positive electrode of aqueous diaphragm（+）The voltage drop U1 of moisture film → water penetration diaphragm direct impedance between → positive electrode and water penetration diaphragm The voltage drop U3 of the anti-generation of water resistance between negative electrode in pressure drop U2 → water penetration diaphragm and water tank of generation.

And positive electrode is only contacted with the infiltration water of water penetration diaphragm, i.e. positive electrode is close to water penetration diaphragm, such water electrolysis When liberation of hydrogen, the gas that generates of oxygen evolution reaction easily enters in the water passage of permeable micropore and in the water in water passage Bubble is generated, bubble is easy to be crushed to generate in the narrow environment in the water passage of the permeable micropore of water penetration diaphragm Localized hyperthermia's high pressure, and then efficient water body plasma discharge is inspired with minimum voltage, in water penetration diaphragm and water penetration The plasma of hydroxyl free base class transient state oxidation factor is generated in the water of diaphragm neighboring area（Plasma be with solid-state, liquid, Gaseous state is in the 4th state of substance of same level, and low temperature plasma is rich in electronics, ion, free radical and excited state molecule, electricity Son has very high reactivity with ion, and the chemical reaction for being difficult to carry out or speed is difficult under usual conditions can be made to become very Rapidly, it is discharged by water body and generates plasma group, the degradation efficiency of pollutant in water body can be greatly improved）, the hydroxyl free The oxidisability of base transient state oxidation factor is extremely strong（More than ozone）, while existence time in water is again extremely short, therefore can produce Rapidly to Organic substance in water after life（Such as bacterium）Equal pollutants are formed after extremely strong degradation and itself rapid oxidation directly also Originally it was water, and did not stayed any toxic side effect.

The present invention is exactly these characteristics using hydroxy radical, special for this special micro-polluted water water quality of tap water for city On the one hand anode direct oxidation reaction is drawn out to outside water tank and occurs, exclude oxidation reaction by ingehious design in structure by point On the other hand the effect of anode indirect oxidation is performed to ultimate attainment, purification of the realization to its depth of source water electrode and safety by toxic byproduct. Specifically practical function is：（1）Electrochemical water treatment technology is made full use of, be unable to reach with reaching existing physics water treatment technology, To the depth degradation of source water pollutant, the effect efficiently removed；（2）By anode direct oxidation reaction be drawn out to outside device into Row, at the same will likely generate chlorate, the hypochlorous acid salt Strong oxdiative factor discharge, inhibit ozone generate, with reduce in container The risk of toxic byproduct is generated in interior water；（3）It relies primarily on hydroxy kind strong oxidizing property and the service life is extremely short and between having no toxic side effect Electrochemistry intermediate is connect, to realize desired electro-chemical water treatment effect.

In the use of the present invention, source water carries out electrochemical treatments, inactivation of bacterial, depth degradation through the electrolysis cells first Then the major pollutants such as the organic matter in the water of removal source are filtered out in water through the further physics interception of the membrane filter unit and are remained Harmful substance, and also filter out in the electrolysis cells course of work there may be cause Biological indicators be deteriorated secondary substance, I.e. the present invention uses the combination of " preposition electrochemical treatments and membrane filtration postpositive disposal ", to overcome in background technology " physics The various defects of the combination of the preposition processing of absorption-membrane filtration and electrolysis water unit postpositive disposal "（For example it mentions in the prior art Filter membrane be easy broken invalid, heavy metals exceeding standard etc.）, obtain required pure water.Heretofore described membrane filter unit is Pure physical treatment mode, it is ensured that the tight security of effluent quality especially Biological indicators, and the pollution in source water of the present invention Basic handling is clean before entering the membrane filter unit for object, therefore the live load of the membrane filter unit subtracts significantly Gently, correspondingly, the service life of the membrane filter unit greatly prolongs.

Preferably, the pore size of the permeable micropore of the water penetration diaphragm and shape are essentially identical.

In the present invention, if the aperture of the permeable micropore of water penetration diaphragm is excessive（I.e. microporous space is excessive）Then it is equivalent to change Mutually increase electrode diameter（Electrode curvature radius）Cause discharge in water starting excitation voltage to increase, and makes generation bubble volume Become larger and reduces the catalytic specific surface area of gas-liquid two-phase.And the aperture of the permeable micropore of water penetration diaphragm is too small（Cross water Channel is too small）, can make that electrolysis aerogenesis can not occur or gas producing efficiency is extremely low, it is small can make to a certain extent electrolysis aerogenesis without Method enters the permeable aperture of micropore, to make plasma discharge that can not be normally carried out.Therefore, by the repetition test of inventor, Determine that the pore diameter range of the permeable micropore of the water penetration diaphragm is 2 millimeters~1 nanometer, the permeable micropore of the water penetration diaphragm Aperture size between each other each other difference be less than 20%.

Preferably, the water penetration diaphragm is hydrophilic water penetration diaphragm.Hydrophilic film surface energy forms hydrogen bond with water Ordered structure can improve fenestra water-filling wet face state, and the plasma discharge process in film that is conducive to persistently carries out.

In order to preferably obtain the micropore of uniform pore diameter, and further improve the hydrophily of diaphragm, it is more to generate Plasma group（More plasma groups mean to generate the transient state oxidation factor of more great sterilizing abilities in water）, the present invention Described in water penetration diaphragm preferably use following method of modifying made from diaphragm：

1）Ultraviolet case internal irradiation 10-30 minutes for being 40 DEG C -60 DEG C in temperature by nanometer titanium dioxide titanium solution；

2）Film liquid is formed by the raw material of following mass ratio：

PVDF：20%-30%

Pore-foaming agent：2-5%

Step 1）Nano-titanium dioxide after irradiation：2%-4%

Surfactant：3%-5%

Solvent：70%-80%；

3）The film liquid configured is passed through into supersonic oscillations 20-40 minutes；

4）Liquid film is spread to knifing machine, liquid film is stood to 10-30 seconds in air, is then immersed in solidification liquid and is frozen into Aqueous diaphragm；

5）The diaphragm impregnates 10-40 minutes in a concentration of 10% alcohol water blend, is then placed in deionized water and floats It washes；

6）The diaphragm is placed in the pure water tank for being applied with 10kv DC pulse high voltages and is handled 1 hour.

The shape uniformity of membrane micropore and the uniformity of pore size, it is very big on plasma discharge influence in film, therefore Heretofore described water penetration diaphragm is preferably respectively formed plasma discharge in each permeable micropore when in use.It is put in this way in use When electric, the direction of an electric field between anodic-cathodic can penetrate the plasma group of each permeable micropore, and plasma discharge is directed to It carries out in all water passages of aqueous diaphragm, to which water-outlet body plasma discharge can be excited with minimum voltage, gives birth in water At the transient state oxidation factor of a large amount of great sterilizing abilities, the degradation efficiency of pollutant in water body can be greatly improved, preferably into Row sterilizing etc..

In addition, since water penetration diaphragm obtains the clamping protection of paired electrode, experiment proves that the water penetration diaphragm is using It will not be scrapped in the process because of premature failures such as damaged or obstructions, remain reliable and stable working condition；Even if water penetration every It is also scum loosely that film and electrode surface, which occasionally have fouling, therefore is suitably switched in electrolytic process and be applied to water penetration diaphragm The decomposition voltage polarity of the paired electrode of both sides, so that it may easily to remove anions and canons precipitate in electrode and water penetration The deposition fouling of membrane surface.

The improvement of above-mentioned technical proposal is：Between first water outlet and the second water inlet be equipped with triple valve, described three The entrance of port valve is connected to the first water outlet, and the first outlet of the triple valve is connected to the second water inlet, the triple valve Second outlet is connected to the first water inlet of water tank.In this way, the triple valve just has two states, it is to make described first respectively The first state that water outlet is connected to the first water inlet and the second state for making the first water outlet be connected to the second water inlet, when three When port valve is in first state, so that it may to obtain the drinking water of health；When triple valve is in the second state, can make in water tank Flow move up, to realize cyclic electrolysis, the various zwitterions in water pass through during cell reaction out of water tank Water penetration diaphragm moves to and is exhausted outside water tank, the water quality in water tank is made constantly to be purified.

Preferably, the electrolysis power is that the direct current pulse power source of high level narrow spaces or forward voltage level are more than reversely The component pulse-changing power of voltage level.

Description of the drawings

The invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the structural schematic diagram of the embodiment of the present invention.

Specific implementation mode

Embodiment

The simple desk type water dispenser of the present embodiment is as shown in Figure 1, include electrolysis cells and membrane filter unit 9；Electrolysis cells It is the electrolysis power 2 and water tank 1 of yin, yang electrode 3-1,3-2 power supply, pairs of negative electricity including a pair of of yin, yang electrode 3-1,3-2 Water penetration diaphragm 5-1 is equipped between pole 3-1 and positive electrode 3-2；Water tank 1 is equipped with the first water inlet 1-1 and the first water outlet 1- 2, water penetration diaphragm 5-1 is made of non-conductive material, and window is offered on the side wall of water tank 1, and water penetration diaphragm 5-1 is completely applied It is laid on window, negative electrode 3-1 is set to 1 inside of water tank and positive electrode 3-2 is set to outside water tank 1, when in use, in water tank 1 Water oozed out by water penetration diaphragm 5-1, and be clamped with water membrane between water penetration diaphragm 5-1 and positive electrode 3-2（When So, it may also be contacted by infiltration water spot between water penetration diaphragm 5-1 and positive electrode 3-2 or face contacts）；Membrane filter unit 9 is set There are the second water inlet and the second water outlet, the first water outlet 1-2 to be connected to the second water inlet；First water outlet 1-2 and second into Booster pump 8 is equipped between the mouth of a river.Gap between water penetration diaphragm 5-1 and positive electrode 3-2（That is water film）Lower section is equipped with blowdown Pond（It is not shown in figure）.

Micro-filtrate membrane filtration unit, ultrafiltration membrance filter unit or NF membrane mistake may be used in membrane filter unit 9 in the present embodiment Filter traditional membrane filter units such as unit, naturally it is also possible to using physisorptive filter unit etc..

The pore size of the preferably permeable micropores of water penetration diaphragm 5-1 and the essentially identical diaphragm of shape in the present embodiment；Into One step, preferably the aperture of the permeable micropore of water penetration diaphragm is less than 2 millimeters and the diaphragm more than 1 nanometer, and water penetration diaphragm Difference is less than 20% to the aperture size of the permeable micropore of 5-1 each other between each other.

The water penetration diaphragm 5-1 of the uniform pore diameter of micropore in order to obtain, and improve the hydrophily etc. of diaphragm, in the present embodiment Water penetration diaphragm 5-1 preferably uses diaphragm made from following method of modifying：

1）Ultraviolet case internal irradiation 10-30 minutes for being 40 DEG C -60 DEG C in temperature by nanometer titanium dioxide titanium solution；

2）Film liquid is formed by the raw material of following mass ratio：

PVDF：20%-30%

Pore-foaming agent：2-5%

Step 1）Nano-titanium dioxide after irradiation：2%-4%

Surfactant：3%-5%

Solvent：70%-80%；

3）The film liquid configured is passed through into supersonic oscillations 20-40 minutes；

4）Liquid film is spread to knifing machine, liquid film is stood to 10-30 seconds in air, is then immersed in solidification liquid and is frozen into Aqueous diaphragm；

5）The diaphragm impregnates 10-40 minutes in a concentration of 10% alcohol water blend, is then placed in deionized water and floats It washes；

6）The diaphragm is placed in the pure water tank for being applied with 10kv DC pulse high voltages and is handled 1 hour.

When in use, source water is first injected water tank 1 by the water dispenser of the present embodiment from the first water inlet, then in water tank 1 Electrolysis pretreatment is carried out to source water, traditional membrane filter unit is transported to finally by booster pump 8 and the water after electrolysis was carried out Filter, obtains the drinking water of deep purifying.

The present embodiment can also make following improve：

1）Three-way magnetic valve 7, entrance and the booster pump 8 of three-way magnetic valve 7 are equipped between booster pump 8 and the second water inlet Outlet, the first outlet of three-way magnetic valve 7 are connected to the second water inlet, second outlet and the water tank 1 of three-way magnetic valve 7 First water inlet 1-1 connections.In this way, three-way magnetic valve 7 just has two states, it is the outlet and second for making booster pump 8 respectively The first state of water inlet connection and the second state for making the outlet of booster pump 8 be connected to the first water inlet 1-1, when threeway electromagnetism When valve 7 is in first state, so that it may to obtain the drinking water of health；When three-way magnetic valve 7 is in the second state, water can be made Flow in case 1 moves up, and to realize cyclic electrolysis, the various zwitterions in water are during cell reaction, from water tank 1 It is interior to pass through water penetration diaphragm 5-1, it moves to and is exhausted outside water tank 1, the water quality in water tank 1 is made constantly to be purified.

2）Water penetration diaphragm 5-1 is hydrophilic water penetration diaphragm.In this way, shape in micropore can be improved in water penetration diaphragm It is reacted at water body low pressure cold plasma discharge, obtains more plasma groups, to improve bactericidal effect, and not will produce smelly The poison byproduct such as oxygen.

3）In order to improve electrolytic efficiency, multiple windows are provided on water tank 1, each window expires compress and is equipped with water penetration diaphragm 5-1, the water penetration diaphragm both sides at each window are respectively equipped with pairs of yin, yang electrode to one group of electrode pair of composition, To yin, yang electrode it is multipair to also having, match with the number of window.

4）First water outlet 1-2 is placed in the side wall of water tank 1, and taper is made in the bottom of water tank 1, is equipped on bottom Sewage draining exit for precipitation flocks in water tank 1 to be discharged.

5）Electrolysis power 2 is that the direct current pulse power source of high level narrow spaces or forward voltage level are more than backward voltage level Component pulse-changing power.

6）For more preferable more generation hydroxyl radical free radical plasma groups, the water penetration diaphragm is preferably each when in use It is respectively formed plasma discharge in permeable micropore.

The present invention is not limited to the above embodiment the specific technical solution, and in addition to the implementation, the present invention may be used also To there is an other embodiment, all technical solutions formed using equivalent replacement, be the present invention claims protection domain.

Claims (10)

1. a kind of simple desk type water dispenser, including electrolysis cells and membrane filter unit；The electrolysis cells include at least a pair of cloudy Positive electrode, the electrolysis power and water tank powered for the anodic-cathodic, are equipped with water penetration between pairs of negative electrode and positive electrode Diaphragm；It is characterized in that：The water tank is equipped with the first water inlet and the first water outlet, and the water penetration diaphragm is by the positive electricity Pole is separated with water tank, and the water penetration diaphragm is water penetration diaphragm made of non-conducting material, is opened up on the side wall of the water tank There are window, the water penetration diaphragm to expire compress and be located on window, the positive electrode is set to outside water tank, and the negative electrode is located at water In case；The membrane filter unit is equipped with the second water inlet and the second water outlet, and first water outlet is connected to the second water inlet； When in use, the negative electrode is in direct contact with the water in the water tank, and the positive electrode only passes through water penetration with the water tank The infiltration water contact of diaphragm exudation.

2. simple desk type water dispenser according to claim 1, it is characterised in that：First water outlet and the second water inlet Between be equipped with triple valve, the entrance of the triple valve is connected to the first water outlet, the first outlet of the triple valve and second into The mouth of a river is connected to, and the second outlet of the triple valve is connected to the first water inlet.

3. simple desk type water dispenser according to claim 1, it is characterised in that：The permeable micropore of the water penetration diaphragm Pore size and shape are essentially identical.

4. according to any simple desk type water dispenser of claim 1-3, it is characterised in that：The water penetration diaphragm is parent Aqueous water penetration diaphragm.

5. according to any simple desk type water dispenser of claim 1-3, it is characterised in that：The water penetration diaphragm it is saturating The aperture of water micropore is less than 2 millimeters and is more than 1 nanometer, and difference is less than 20% to the aperture size of permeable micropore each other between each other.

6. according to any simple desk type water dispenser of claim 1-3, it is characterised in that：The membrane filter unit is micro- Membrane filtration unit, ultrafiltration membrance filter unit or nanofiltration membrane unit.

7. according to any simple desk type water dispenser of claim 1-3, it is characterised in that：The water penetration diaphragm and sun Gap between electrode is arranged right below pollution discharge pond.

8. according to any simple desk type water dispenser of claim 1-3, it is characterised in that：The electrolysis power is high electricity The direct current pulse power source or forward voltage level of flat narrow spaces are more than the component pulse-changing power of backward voltage level.

9. according to any simple desk type water dispenser of claim 1-3, it is characterised in that：When in use, described permeable It is respectively formed plasma discharge in the permeable micropore of each of property diaphragm.

10. according to any simple desk type water dispenser of claim 1-3, it is characterised in that：The water penetration diaphragm is adopted Diaphragm obtained using the following method：

1）Ultraviolet case internal irradiation 10-30 minutes for being 40 DEG C -60 DEG C in temperature by nanometer titanium dioxide titanium solution；

2）Film liquid is formed by the raw material of following mass ratio：

PVDF：20%-30%

Pore-foaming agent：2-5%

Step 1）Nano-titanium dioxide after irradiation：2%-4%

Surfactant：3%-5%

Solvent：70%-80%；

3）The film liquid configured is passed through into supersonic oscillations 20-40 minutes；

4）Liquid film is spread to knifing machine, liquid film is stood to 10-30 seconds in air, is then immersed in solidification liquid and is frozen into water penetration Diaphragm；

5）The diaphragm impregnates 10-40 minutes in a concentration of 10% alcohol water blend, is then placed in deionized water and rinses；

6）The diaphragm is placed in the pure water tank for being applied with 10kv DC pulse high voltages and is handled 1 hour.