CN1222476C - Nano filter membrane base domestic water purifier having no need of storage tank - Google Patents
Nano filter membrane base domestic water purifier having no need of storage tank Download PDFInfo
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- CN1222476C CN1222476C CN 03145434 CN03145434A CN1222476C CN 1222476 C CN1222476 C CN 1222476C CN 03145434 CN03145434 CN 03145434 CN 03145434 A CN03145434 A CN 03145434A CN 1222476 C CN1222476 C CN 1222476C
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- nanofiltration membrane
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Abstract
The present invention relates to a nanofiltration membrane base household water purifier without a storage tank. The water purifier uses a nanofiltration membrane filter as a main filtering part, and a storage tank for storing purified water is not required. Although the traditional reverse osmosis membrane base water purifying system can supply high quality water, the traditional reverse osmosis membrane base water purifying system has the problems that because the storage tank is installed under the condition of insufficient flow speed, the volume of the water purifier is increased; simultaneously, the secondary pollution caused by microbe breeding occurs because the storage time is extended. Thus, the present invention provides a nanofiltration membrane base household water purifier without a storage tank, wherein the nanofiltration membrane filter with a micro hole of 0.1 to 10 nm is used as the main filtering part of the water purifier.
Description
Technical field
The present invention relates to a kind of nanofiltration (nanofiltration) film base household water filter (waterpurifier) that need not storage tank, more specifically relate to a kind of household water filter of nanofiltration membrane base, it need not to hold water purification with storage tank, in contrast, traditional water purification system then needs water purification is stored in its storage tank so that use when needing.
Background technology
Along with industrial expansion, water pollutes and the water resources shortage occurs as serious problems.Because industrial progress, population growth and the standard of living improve, people increase fast to the demand of high-quality water.Yet the water that causes because of domestic household effluent or industrial sewage pollutes and has become a serious problem, therefore, and the available water shortage that become.In order effectively to utilize limited water resource, except eliminating water pollution source, before the edible natural tap water, carry out purifying treatment and be necessary fully.
Traditional water purifier adopts different types of purification system according to filter type.At present, it is believed that it is the most effective adopting the purification system of filtering membrane, because it can remove the impurity that comprises such as small materials such as bacterium and heavy metal (minute substance).
As the representational filtering membrane that is used for water purifier, have a kind of ultra-filtration membrane (ultrafiltrationmembrane), a kind of nanofiltration membrane (nanofiltration membrane) and a kind of reverse osmosis membrane.Wherein, ultra-filtration membrane is mainly used in the material of removing the colloid size.Although because its micropore size (pore size) thus can provide high flow rate than the big of nanofiltration membrane and reverse osmosis membrane,, just have limitation for removing the so small material of bacteria-like and heavy metal.
Simultaneously, reverse osmosis membrane can be removed the nearly all small material of bacteria-like and heavy metal, thereby is widely used recently.The water cleaning systems of this reverse osmosis membrane base is comprising United States Patent (USP) 4,626, is disclosed in several pieces of documents such as 346 and 6,190,558.Yet the water cleaning systems great majority of this reverse osmosis membrane base all are provided with storage tank and are used to store water purification, and reason is its underfed.Thereby have such problem, because the volume that storage tank has just increased water purifier has been installed, and, thereby because the storage time prolongation makes microbial reproduction cause secondary pollution.
Summary of the invention
Therefore, carry out the present invention in view of the above problems, the purpose of this invention is to provide a kind of household water filter of nanofiltration membrane base, it can remove the nearly all impurity that comprises bacterium and heavy metal, and need not to install and be used to store the water purifying storage tank.
According to the present invention, above and other objects of the present invention can realize by a kind of household water filter that need not the nanofiltration membrane base of storage tank is provided, this water purifier comprises pre-treatment filtration part, main filtration fraction and post-processing filtering part, described pre-treatment is filtered part and is comprised pretreatment filters and pre-treatment carbon filter (carbon filter), it is characterized in that, adopt nanofiltration membrane strainer with suitable flow at described main filtration fraction.
Preferably, the micropore magnitude range of the nanofiltration membrane that the present invention adopts is about 0.1～10nm, and it is equivalent to the average micropore size (mean pore size) between described reverse osmosis membrane and described ultra-filtration membrane.Advantageously, the water purifier of this nanofiltration membrane base can selectively can not influence the monovalent ion of HUMAN HEALTH and remove nearly all polyvalent ion, low-molecular-weight organic matter and bacterium by some.Specifically, when nanofiltration membrane has than the big micropore of reverse osmosis membrane size,, just can obtain purifying waste water of aequum immediately from the water purification outlet valve by regulating pump pressure or effective film area.And nanofiltration membrane can be according to providing a kind of screening effect (sieving effect) as the micropore size in the nanofiltration membrane, and by ionic adsorption is removed about 30～60% monovalent ion and calcium ion to the film surface.Particularly, can remove 90% or more polyvalent ion and salt such as vitriol, thereby the tap water that contains an amount of mineral substance is provided.
According to the manufacture method of nanofiltration membrane, nanofiltration membrane can be divided into spiral spiral wound type membrane and hollow fiber type film, and the both can use in the present invention.Also can nanofiltration membrane be divided into polyamide based and polyvinyl alcohol basement membrane according to mould material.The micropore magnitude range of supposing film is 0.1～10nm, can use described nanofiltration membrane among the present invention and irrelevant with mould material.Usually, by with multivalence amine such as piperazine and mphenylenediamine (methaphenylendiamine) and 1,3,5-benzene three formyl chlorides (trimesoylchloride) carry out interfacial polymerization on many porous carriers just can make polyamide based.By polyvinyl alcohol being applied to more than one on the porous carrier, be cured processing then, just can make the polyvinyl alcohol basement membrane.
Preferably, the scope of water volume is about 1.0～3.5 liters/minute in order to make into, the nanofiltration membrane component that is adopted (module) has the effective film area of about 0.743～4.645 square metre (8 to 50 square feet), the length of the external diameter of～0.1143 meter 0.0381 (1.5～4.5 inches) and 0.2032～0.4572 meter (8～18 inches).For the water purifier that does not have storage tank, be insufficient less than 1.0 liters/minute water inlet volumes.On the other hand, if the water inlet volume surpasses 3.5 liters/minute, then the capacity of pump must increase, thereby the size of described assembly also increases greatly.
Description of drawings
By below in conjunction with the detailed description that accompanying drawing carried out, will understand clearlyer to above-mentioned purpose of the present invention and other purpose, feature and advantage, wherein:
Fig. 1 is the synoptic diagram according to the water cleaning systems of water purifier of the present invention.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, water cleaning systems of the present invention comprises water-supply pipe 3, pretreatment filters 4, and pre-treatment carbon filter 6 plays nanofiltration membrane strainer 7, check valve 8, posttreatment filter 9 and the water purification outlet valve 10 of main filtration fraction effect.During water purification, discharge by flowrate control valve 11 by concentrating water pipe 13 from the concentrated water (concentrate water) of nanofiltration membrane strainer 7.
Microdeposit thing strainer (microsediment filter) and carbon filter that described pretreatment filters 4 can be metal or plastic material, described carbon filter for example is granular active carbon strainer, powdered active carbon strainer and shaft-like activated charcoal filter, and described strainer is used singly or in combination.Described posttreatment filter 9 can be disinfection by ultraviolet light strainer, activated charcoal filter, porcelain filter, argentiferous activated charcoal filter, ultrafiltration membrance filter device and magnetization strainer (magnetizationfilter), and described strainer is used singly or in combination.
Described nanofiltration membrane strainer 7 is the main filtration fractions in the water cleaning systems of the present invention, and it has used the nanofiltration membrane of a kind of micropore size in about 0.1～10nm scope.Micropore size less than 0.1nm is inappropriate for the water purifier that does not use storage tank, because its underfed.On the other hand, if the micropore size surpasses 10nm, then just can not be removed fully such as impurity such as heavy metal and bacteriums.Water purification in described main filtration fraction is pumped into posttreatment filter 9 so that carry out last clean water treatment by check valve 8.When needing, the water of final purification is directly discharged from water purification outlet valve (purified waterdischarge valve) 10.1 is water lines among the figure, and 2 for being used for the pipeline of supplied water, and 12 is water pipeline
Design hydraulic pressure of the present invention or pressure pump 5 selectively to regulate the input rate (inputrate) of not purifying waste water, (under the working pressure condition in 15～120psi) scopes, its input rate is in about 1.0～12 liters/minute scope at about 103.41～827.28KPa.
Hereinafter will describe the present invention by non-restrictive example.
Embodiment 1
The working pressure of the pressure pump 5 of water cleaning systems shown in Figure 1 is 206.82KPa (30psi), the micropore size of the nanofiltration membrane component that uses is 1.5nm, the effective film area is 2.139 square metres (23 square feet), and external diameter is 0.0889 meter (3.5 inches), and length is 0.3048 meter (12 inches).Measure its flow and ratio of desalinization, the results are shown in the following table 1.
In not purifying waste water, NaCl and MgSO
4Concentration be respectively 500ppm and 2,000ppm.
Example 2-6
Carry out the step identical, just adopt the working pressure shown in the table 1 with the foregoing description 1.Its cleaning water is estimated, be the results are shown in the following table 1.
Table 1
| Embodiment | Working pressure (KPa) (psi) | Flow (liter/sky) (gpd) | Flow (ml/min) | NaCl removes rate (%) | MgSO 4Remove rate (%) |
| Embodiment 1 | 206.82(30) | 1476.28(390) | 1027 | 62.0 | 98.1 |
| Embodiment 2 | 103.41(15) | 810.06(214) | 564 | 58.9 | 97.6 |
| Embodiment 3 | 310.23(45) | 2157.64(570) | 1498 | 63.8 | 98.3 |
| Embodiment 4 | 413.64(60) | 2759.51(729) | 1916 | 64.4 | 98.5 |
| Embodiment 5 | 620.46(90) | 3838.32(1014) | 2666 | 64.6 | 98.7 |
| Embodiment 6 | 827.28(120) | 5053.41(1335) | 3510 | 64.6 | 98.7 |
From the foregoing description as can be seen, adopt the water purifier of water cleaning systems of the present invention can remove monovalent ion and reach a rational degree, and can remove nearly all divalence or a polyvalent salt.The result is, kept the original taste of water, and removed such as impurity such as heavy metal and bacteriums, thereby the tap water of good quality can be provided.And, in the time of needs, can directly obtain tap water with about 1.0～3.5 liters/minute water inlet volume from water purifier of the present invention, need not to store.
Although the preferred embodiments of the invention have been carried out explanatory description, but, should be known in that those skilled in the art can carry out various modifications, increase and replacement under the condition that does not deviate from the disclosed scope and spirit of the present invention of appending claims.
Claims (4)
1. nanofiltration membrane base household water filter that need not storage tank, comprise pretreatment filters (4), pre-treatment carbon filter (6), main filtration fraction (7), check valve (8) and posttreatment filter (9), wherein water purification is directly discharged and be need not to store from water purification outlet valve (10), it is characterized in that, adopt the nanofiltration membrane strainer as main filtration fraction (7), the micropore size of this nanofiltration membrane strainer is 0.1～10nm, and the effective film area is 0.743～4.645 square metre, and external diameter is 0.0381～0.1143 meter, length is 0.2032～0.4572 meter, so that 1.0～3.5 liters/minute water inlet volume to be provided.
2. the nanofiltration membrane base household water filter that need not storage tank according to claim 1 is characterized in that, makes described nanofiltration membrane strainer by carrying out interfacial polymerization on many porous carriers to piperazine or mphenylenediamine and pyromellitic trimethylsilyl chloride.
3. the nanofiltration membrane base household water filter that need not storage tank according to claim 1 is characterized in that described nanofiltration membrane strainer is selected from spiral winding-type nanofiltration membrane strainer and hollow fiber type nanofiltration membrane strainer.
4. the nanofiltration membrane base household water filter that need not storage tank according to claim 1 is characterized in that: be connected with pressure pump (5) between described pretreatment filters (4) and described pre-treatment carbon filter (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03145434 CN1222476C (en) | 2003-01-06 | 2003-01-06 | Nano filter membrane base domestic water purifier having no need of storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03145434 CN1222476C (en) | 2003-01-06 | 2003-01-06 | Nano filter membrane base domestic water purifier having no need of storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1515499A CN1515499A (en) | 2004-07-28 |
| CN1222476C true CN1222476C (en) | 2005-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03145434 Expired - Lifetime CN1222476C (en) | 2003-01-06 | 2003-01-06 | Nano filter membrane base domestic water purifier having no need of storage tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103775703B (en) * | 2012-10-24 | 2016-03-23 | 美的集团股份有限公司 | Water purifier and regulating valve |
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Granted publication date: 20051012 |