CN108455746A - A kind of intelligent water purification machine based on reverse osmosis technology - Google Patents

A kind of intelligent water purification machine based on reverse osmosis technology Download PDF

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Publication number
CN108455746A
CN108455746A CN201810363735.9A CN201810363735A CN108455746A CN 108455746 A CN108455746 A CN 108455746A CN 201810363735 A CN201810363735 A CN 201810363735A CN 108455746 A CN108455746 A CN 108455746A
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China
Prior art keywords
reverse osmosis
filter
purification machine
water purification
machine based
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Withdrawn
Application number
CN201810363735.9A
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Chinese (zh)
Inventor
王洪智
岳阳
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Shanghai Huatai Huatai Environmental Protection Technology Co Ltd
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Shanghai Huatai Huatai Environmental Protection Technology Co Ltd
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Priority to CN201810363735.9A priority Critical patent/CN108455746A/en
Publication of CN108455746A publication Critical patent/CN108455746A/en
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • 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
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/12—Halogens or halogen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/203—Iron or iron compound
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/22—Chromium or chromium compounds, e.g. chromates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The present invention discloses a kind of intelligent water purification machine, belongs to Domestic water purifying service technology field, relates generally to a kind of intelligent water purification machine based on reverse osmosis technology；The present invention is to solve pure water equipment in the prior art to detect electrolyte in pure water in real time, and single reverse osmosis membrane osmotic effect is undesirable so that there are electrolyte excessive problems for the pure water purified；A kind of intelligent water purification machine based on reverse osmosis technology, including primary filter, secondary filter assembly and ultimate filter device, primary filter include the first PP fabric filter elements, granular activated carbon filter core and the 2nd PP fabric filter elements to establish a connection successively；Secondary filter assembly includes the extruded activated carbon filter core to establish a connection successively and extraordinary copper zinc powder alloyed filtering material；Ultimate filter device includes the RO reverse osmosis membranes to establish a connection successively and postposition bacteriostatic activity filtration core；Control effect of the present invention is good, and filtering accuracy is high, and system stability and reliability are high, and service life is long, it is easy to accomplish.

Description

A kind of intelligent water purification machine based on reverse osmosis technology
Technical field
A kind of intelligence water purification machine, belongs to Domestic water purifying service technology field, relates generally to a kind of based on reverse osmosis technology Intelligent water purification machine.
Background technology
Increasingly accelerate with social progress, global industry process with the development of science and technology, using intelligence manufacture as core Industrial automation has obtained development of advancing by leaps and bounds.However, the fast development of industry but causes the serious dirt of air and water resource Dye.According to incompletely statistics, there are about the sewage of billion cubic meter more than 4200 to be discharged into rivers,lakes and seas every year in the whole world, and it is vertical to polluted 5.5 hundred million The fresh water of square rice, this is equivalent to 14% or more of global river stream total amount.It can be seen that water pollution, which has become, restricts countries in the world One of an important factor for economic development.
Therefore, in the case where water resource seriously pollutes, how to ensure the water safety of people, become the heat of people's research Point topic.However, existing Household water purification equipment is all to use single reverse osmosis membrane as water purification mode mostly at present, it will be certainly Pure water is obtained by filtration in water.However, current pure water equipment cannot detect the electrolyte in pure water, and single reverse osmosis in real time Permeable membrane osmotic effect is undesirable so that the problems such as pure water purified is exceeded there are electrolyte cannot meet the daily need of people It asks.
Invention content
To solve the above-mentioned problems, the invention discloses a kind of intelligent water purification machine based on reverse osmosis technology, in real time monitoring Water water quality electrolyte purification overall process, and use polyamide composite film as RO reverse osmosis membranes, clean-up effect is good, works as drinking water Index when being unsatisfactory for the standard of pure water, can be adjusted by closed-loop system, system stability and reliability are high, use the longevity Life length.
The object of the present invention is achieved like this：
A kind of intelligent water purification machine based on reverse osmosis technology, including establish a connection successively primary filter, secondary mistake Filter device and ultimate filter device, the primary filter include the first PP fabric filter elements to establish a connection successively, Grain active carbon filter core and the 2nd PP fabric filter elements, for removing suspended particulate substance in tap water；The secondary filter assembly includes The extruded activated carbon filter core to establish a connection successively and extraordinary copper zinc powder alloyed filtering material, for adsorbing the liquid in tap water Chlorine, chloramines, partial organic substances and part are caused a disease former；The ultimate filter device includes the RO that establishes a connection successively reverse osmosis Film and postposition bacteriostatic activity filtration core improve the mouthfeel of pure water for detaching and softening pure water by pure water and condensed water.
Preferably, the filter opening diameter ratio of the first PP fabric filter elements and the 2nd PP fabric filter elements is 6:1.
Further, the extraordinary copper zinc powder alloyed filtering material includes that copper powder and zinc powder mixture are atomized, the copper The purity range of powder and zinc powder is 95%-98%.
Further, the mass ratio of the copper powder and zinc powder is 3:2.
Further, extraordinary copper zinc powder alloyed filtering material includes to the removal of impurities in water：
(1) extraordinary copper zinc powder alloyed filtering material has good removal effect, removal rate to work as residual chlorine concentration up to 90% or more chlorine residue When more than 1mg/L, removal rate still can reach 98% or more；50% or more is reached to Fe ion remaval rates, to other metal ions There is preferable removal effect；
(2) extraordinary copper zinc powder alloyed filtering material is to Al3+、Hg2+、Cr6+、Cd2+、Pb2+Removal rate respectively reach 98%, 90%, 94.8%, 73.1% and 66.7%；
(3) extraordinary copper zinc powder alloyed filtering material also has aromatic compound certain removal effect, removal rate can reach 20% with On；
(4) extraordinary copper zinc powder alloyed filtering material has certain sterilization alga-inhibiting action.Under dynamic condition, extraordinary copper zinc powder alloy filter The sterilizing rate of material reaches 90% or more, and chlorophyll a removal rate is 74%.
Further, the RO reverse osmosis membranes be polyamide composite film, the polyamide composite film successively include desalination layer, Supporting layer and base fabric.
Preferably, the thickness ratio of the desalination layer, supporting layer and base fabric is 2:3:1.
Further, the ultimate filter device further includes electrolysis quality detecting device, and the electrolysis quality detecting device includes Governor circuit and the detection circuit being connected with governor circuit.
Further, the governor circuit includes main control chip and the peripheral circuit that is connected with main control chip, described outer It includes minimum system circuit, protection circuit, interface circuit and display circuit to enclose circuit.
Preferably, the main control chip is dsp chip, model TMS320C28335, working frequency 100kHz.
Further, electrolysis quality detecting device is detected the electrolyte of water quality by fuzzy control method, detection step Suddenly include：
Step 1, network inputs variable are electrolyte numerical error e1With electrolyte numerical bias change rate ef；
Step 2, the activation primitive representative of input layer is just the membership function of fuzzy variable.The weights A of this layerijWith aij、bijDifference also mean that shape and the position of protean membership function, what the output of this layer represented is exactly to obscure Change result-degree of membership of obtained membership function.
Step 3, middle layer are the functions that the degree of membership for obtaining blurring is multiplied two-by-two.The output of middle layer represents These strength transfers can be carried out deblurring by the rule intensity of fuzzy rule to next layer.
Step 4, each weights d of output layerkFuzzy rule is represented, according to the deblurring mode of gravity model appoach, as long as will They are the output quantity of fuzzy control as weights and input, i.e. rule intensity weighted sum, output.
Compared with prior art, the present invention having the advantages that：
(1) the present invention's is reasonable for structure, and using polyamide composite film as RO reverse osmosis membranes, pure water and condensed water are detached, and leads to Cross whether the electrolyte that electrolysis quality detecting device is detected in real time in drinking water meets pure water requirement, when the index of drinking water is unsatisfactory for When the standard of drinking water, polyamide composite film is applied to drinking water again osmosis filtration, until water quality by closed loop cycle Meet testing result；
(2) using the extruded activated carbon filter core to establish a connection successively and extraordinary copper zinc powder alloyed filtering material as secondary filter Device works well to contaminant filter in drinking water, compared with extruded activated carbon filter core is used alone, is carried to the removal rate of impurity Rise 37%；
(3) the reverse osmosis progress of RO is controlled using fuzzy control method to the filtering of the electrolyte of drinking water, control effect is good, filtering essence Degree is high, and system stability and reliability are high, and service life is long, it is easy to accomplish.
Description of the drawings
Fig. 1 is a kind of overall structure block diagram of the intelligent water purification machine based on reverse osmosis technology of the present invention；
Fig. 2 is a kind of polyamide composite film structure chart of the intelligent water purification machine based on reverse osmosis technology of the present invention.
Specific implementation mode
The specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.
Embodiment 1
A kind of intelligent water purification machine based on reverse osmosis technology, including establish a connection successively primary filter, secondary mistake Filter device and ultimate filter device.
Primary filter includes the first PP fabric filter elements to establish a connection successively, granular activated carbon filter core and second PP fabric filter elements, for removing suspended particulate substance in tap water；Secondary filter assembly includes the compression to establish a connection successively Active carbon filter core and extraordinary copper zinc powder alloyed filtering material, for adsorbing the liquid chlorine in tap water, chloramines, partial organic substances and part It causes a disease former；Ultimate filter device includes the RO reverse osmosis membranes to establish a connection successively and postposition bacteriostatic activity filtration core, is used for By pure water and condensed water separation and softening pure water, improve the mouthfeel of pure water.
The filter opening diameter ratio of first PP fabric filter elements and the 2nd PP fabric filter elements is 6:1.
Extraordinary copper zinc powder alloyed filtering material includes that copper powder and zinc powder mixture are atomized, the purity of the copper powder and zinc powder Range is 95%.
The mass ratio of copper powder and zinc powder is 3:2.
RO reverse osmosis membranes are polyamide composite film, and the polyamide composite film includes desalination layer 1, supporting layer 2 and base successively Cloth 3.
The thickness ratio of desalination layer 1, supporting layer 2 and base fabric 3 is 2:3:1.
The present invention working method be：Drinking water after secondary water-supply is first by the primary filter of water purification machine First PP fabric filter elements, granular activated carbon filter core and the 2nd PP fabric filter elements removal tap water in suspended particulate substance, then incited somebody to action Drinking water after filter is closed through the extruded activated carbon filter core in secondary filter assembly with extraordinary copper zinc powder by secondary filter assembly Golden filtrate carries out secondary filter, adsorbs the liquid chlorine in tap water, chloramines, partial organic substances and original of partly causing a disease, finally will be secondary RO reverse osmosis membrane and postposition bacteriostatic activity filtration core of the filtered drinking water through ultimate filter device carry out whole grade filtering, simultaneously Electrolysis quality detecting device is detected the electrolyte in drinking water, when testing result is unqualified then anti-by fuzzy control closed loop It is for re-filtering to be fed to RO reverse osmosis membranes, until testing result qualification.
Embodiment 2
A kind of intelligent water purification machine based on reverse osmosis technology, including establish a connection successively primary filter, secondary mistake Filter device and ultimate filter device.
Primary filter includes the first PP fabric filter elements to establish a connection successively, granular activated carbon filter core and second PP fabric filter elements, for removing suspended particulate substance in tap water；Secondary filter assembly includes the compression to establish a connection successively Active carbon filter core and extraordinary copper zinc powder alloyed filtering material, for adsorbing the liquid chlorine in tap water, chloramines, partial organic substances and part It causes a disease former；Ultimate filter device includes the RO reverse osmosis membranes to establish a connection successively and postposition bacteriostatic activity filtration core, is used for By pure water and condensed water separation and softening pure water, improve the mouthfeel of pure water.
The filter opening diameter ratio of first PP fabric filter elements and the 2nd PP fabric filter elements is 6:1.
Extraordinary copper zinc powder alloyed filtering material includes that copper powder and zinc powder mixture are atomized, the purity of the copper powder and zinc powder Range is 98%.
The mass ratio of copper powder and zinc powder is 3:2.
RO reverse osmosis membranes are polyamide composite film, and the polyamide composite film includes desalination layer 1, supporting layer 2 and base successively Cloth 3.
The thickness ratio of desalination layer 1, supporting layer 2 and base fabric 3 is 2:3:1.
The present invention working method be：Drinking water after secondary water-supply is first by the primary filter of water purification machine First PP fabric filter elements, granular activated carbon filter core and the 2nd PP fabric filter elements removal tap water in suspended particulate substance, then incited somebody to action Drinking water after filter is closed through the extruded activated carbon filter core in secondary filter assembly with extraordinary copper zinc powder by secondary filter assembly Golden filtrate carries out secondary filter, adsorbs the liquid chlorine in tap water, chloramines, partial organic substances and original of partly causing a disease, finally will be secondary RO reverse osmosis membrane and postposition bacteriostatic activity filtration core of the filtered drinking water through ultimate filter device carry out whole grade filtering, simultaneously Electrolysis quality detecting device is detected the electrolyte in drinking water, when testing result is unqualified then anti-by fuzzy control closed loop It is for re-filtering to be fed to RO reverse osmosis membranes, until testing result qualification.
Comparative example 1
A kind of intelligent water purification machine based on reverse osmosis technology, including establish a connection successively primary filter, secondary mistake Filter device and ultimate filter device.
Primary filter includes the first PP fabric filter elements to establish a connection successively, granular activated carbon filter core and second PP fabric filter elements, for removing suspended particulate substance in tap water；Secondary filter assembly includes the compression to establish a connection successively Active carbon filter core and extraordinary copper zinc powder alloyed filtering material, for adsorbing the liquid chlorine in tap water, chloramines, partial organic substances and part It causes a disease former；Ultimate filter device includes the RO reverse osmosis membranes to establish a connection successively and postposition bacteriostatic activity filtration core, is used for By pure water and condensed water separation and softening pure water, improve the mouthfeel of pure water.
The filter opening diameter ratio of first PP fabric filter elements and the 2nd PP fabric filter elements is 6:1.
Extraordinary copper zinc powder alloyed filtering material includes that copper powder and zinc powder mixture are atomized, the purity of the copper powder and zinc powder Range is 90%.
The mass ratio of copper powder and zinc powder is 3:1.
RO reverse osmosis membranes are polyamide composite film, and the polyamide composite film includes desalination layer 1, supporting layer 2 and base successively Cloth 3.
The thickness ratio of desalination layer 1, supporting layer 2 and base fabric 3 is 3:3:1.
The present invention working method be：Drinking water after secondary water-supply is first by the primary filter of water purification machine First PP fabric filter elements, granular activated carbon filter core and the 2nd PP fabric filter elements removal tap water in suspended particulate substance, then incited somebody to action Drinking water after filter is closed through the extruded activated carbon filter core in secondary filter assembly with extraordinary copper zinc powder by secondary filter assembly Golden filtrate carries out secondary filter, adsorbs the liquid chlorine in tap water, chloramines, partial organic substances and original of partly causing a disease, finally will be secondary RO reverse osmosis membrane and postposition bacteriostatic activity filtration core of the filtered drinking water through ultimate filter device carry out whole grade filtering, simultaneously Electrolysis quality detecting device is detected the electrolyte in drinking water, when testing result is unqualified then anti-by fuzzy control closed loop It is for re-filtering to be fed to RO reverse osmosis membranes, until testing result qualification.
It compares with comparative example 1 and can relatively obtain by embodiment 1, embodiment 2, reverse osmosis is based on by a kind of disclosed in this case The intelligent water purification machine of saturating technology, embodiment 1, the pure water saliferous rate of embodiment 2 are respectively 2.72mg/L and 1.38mg/L, and are compared The pure water saliferous rate of example 1 is 5.38mg/L, is more than pure water standard 5mg/L, is unsatisfactory for condition.
Compared with prior art, the pure water saliferous rate in embodiment 1 reduces 49.44%, the pure water saliferous in embodiment 2 Rate reduces 73.35%.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch It states, many embodiments and many applications except the example provided all will be aobvious and easy for a person skilled in the art See.Therefore, the scope of the present invention should not be determined with reference to foregoing description, but should with reference to preceding claims and this The full scope of the equivalent that a little claims are possessed determines.For comprehensive purpose, all articles and with reference to including special The disclosure of profit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims Any aspect is not intended to abandon the body matter, also should not be considered as applicant the theme is not thought of as it is disclosed Apply for a part for theme.
The series of detailed descriptions listed above only for the application feasible embodiment specifically Bright, they are all without departing from equivalent implementations made by the application skill spirit not to limit the protection domain of the application Or change should be included within the protection domain of the application.

Claims (6)

1. a kind of intelligent water purification machine based on reverse osmosis technology, including establish a connection successively primary filter, secondary Filter device and ultimate filter device, it is characterised in that：
The primary filter includes the first PP fabric filter elements to establish a connection successively, granular activated carbon filter core and second PP fabric filter elements, for removing suspended particulate substance in tap water；
The secondary filter assembly includes the extruded activated carbon filter core to establish a connection successively and extraordinary copper zinc powder alloy filter Material, for adsorbing the liquid chlorine in tap water, chloramines, the pathogenic original of partial organic substances and part；
The ultimate filter device includes the RO reverse osmosis membranes to establish a connection successively and postposition bacteriostatic activity filtration core, is used for By pure water and condensed water separation and softening pure water, improve the mouthfeel of pure water.
2. a kind of intelligent water purification machine based on reverse osmosis technology according to claim 1, it is characterised in that：First PP The filter opening diameter ratio of fabric filter element and the 2nd PP fabric filter elements is 6:1.
3. a kind of intelligent water purification machine based on reverse osmosis technology according to claim 1, it is characterised in that：The special type copper Zinc powder alloyed filtering material includes that copper powder and zinc powder mixture are atomized, and the purity range of the copper powder and zinc powder is 95%- 98%。
4. a kind of intelligent water purification machine based on reverse osmosis technology according to claim 3, it is characterised in that：The copper powder and The mass ratio of zinc powder is 3:2.
5. a kind of intelligent water purification machine based on reverse osmosis technology according to claim 1, it is characterised in that：The RO reverse osmosis Permeable membrane is polyamide composite film, and the polyamide composite film includes desalination layer, supporting layer and base fabric successively.
6. a kind of intelligent water purification machine based on reverse osmosis technology according to claim 5, it is characterised in that：The desalination The thickness ratio of layer, supporting layer and base fabric is 2:3:1.
CN201810363735.9A 2018-04-26 2018-04-26 A kind of intelligent water purification machine based on reverse osmosis technology Withdrawn CN108455746A (en)

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CN201810363735.9A CN108455746A (en) 2018-04-26 2018-04-26 A kind of intelligent water purification machine based on reverse osmosis technology

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Application Number Priority Date Filing Date Title
CN201810363735.9A CN108455746A (en) 2018-04-26 2018-04-26 A kind of intelligent water purification machine based on reverse osmosis technology

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104550985A (en) * 2014-12-22 2015-04-29 昆山德泰新材料科技有限公司 Low-apparent-density copper zinc alloy brass powder and preparing method thereof
CN204702583U (en) * 2015-05-28 2015-10-14 刘雨田 A kind of Mobile portable environment-friendly type RO anti-penetration water purifier
US20150336813A1 (en) * 2012-07-13 2015-11-26 Kurita Water Industries Ltd. Ultrapure water producting apparatus
CN105727772A (en) * 2016-02-22 2016-07-06 博通分离膜技术（北京）有限公司 Compound reverse-osmosis membrane and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150336813A1 (en) * 2012-07-13 2015-11-26 Kurita Water Industries Ltd. Ultrapure water producting apparatus
CN104550985A (en) * 2014-12-22 2015-04-29 昆山德泰新材料科技有限公司 Low-apparent-density copper zinc alloy brass powder and preparing method thereof
CN204702583U (en) * 2015-05-28 2015-10-14 刘雨田 A kind of Mobile portable environment-friendly type RO anti-penetration water purifier
CN105727772A (en) * 2016-02-22 2016-07-06 博通分离膜技术（北京）有限公司 Compound reverse-osmosis membrane and preparation method thereof

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