CN104478042A - Portable forward osmosis water purification bag and using and cleaning method thereof - Google Patents
Portable forward osmosis water purification bag and using and cleaning method thereof Download PDFInfo
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- CN104478042A CN104478042A CN201410721172.8A CN201410721172A CN104478042A CN 104478042 A CN104478042 A CN 104478042A CN 201410721172 A CN201410721172 A CN 201410721172A CN 104478042 A CN104478042 A CN 104478042A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/002—Forward osmosis or direct osmosis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
- B01D65/06—Membrane cleaning or sterilisation ; Membrane regeneration with special washing compositions
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/445—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by forward osmosis
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
-
- 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
- C02F2103/001—Runoff or storm water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the technical field of water purification, and particularly relates to a portable forward osmosis water purification bag and a using and cleaning method thereof. The portable forward osmosis water purification bag comprises an outer bag and an inner bag, wherein the outer bag is used for containing raw water; the inner bag is arranged in the outer bag and used for containing an absorbing liquid; the outer bag is made of a waterproof material; the inner bag is made of a forward osmosis membrane material; and furthermore, water inlets and water outlets are respectively formed in the outer bag and the inner bag in a staggered manner. According to the portable forward osmosis water purification bag, emergency drinking water can be provided at high efficiency; with a cross-flow cleaning technology as a support, the related structure capable of achieving forward-osmosis cross-flow cleaning is designed; the pollutants intercepted on the surface of the forward osmosis membrane surface are effectively removed; the service life of the water purification bag is prolonged; and the portable forward osmosis water purification bag is suitable for field application, and especially suitable for the conditions of army officers and soldiers or personnel for executing the task outdoors.
Description
Technical field
The invention belongs to water purification technology field, be specifically related to a kind of Portable positive penetrating cleaning water bag and use thereof and purging method.
Background technology
Outdoor sports or execute the task and can face safe drinking water security problem.Along with the fast development of positive infiltration technology; supply water around field emergency, the existing cleaning water bag patent based on positive infiltration technology, but the cleaning water bag designed by these patents is single use substantially; expensive due to current forward osmosis membrane, the large-scale production of these patents is restricted.Although also claim that nonexpondable cleaning water bag designs, purging method concrete after in fact clearly not using.
Chinese patent application 201310077212.5 discloses a kind of multi-functional forward osmosis membrane cleaning water bag of emergency drinking water, in this cleaning water bag, vertical distribution is provided with forward osmosis membrane and water proof interface, cleaning water bag is divided into three independently spaces, is followed successively by original solution chamber, draw sap cavity and water-purifying cavity.During use, in original solution chamber, inject former water, draw in sap cavity to inject and draw liquid, in water-purifying cavity, inject water purification.During purification, former water is entered by forward osmosis membrane and draws sap cavity, by dilute to draw liquid capable of direct drinking.Due to the vertical distribution of forward osmosis membrane in this cleaning water bag, require whole cleaning water bag horizontal positioned during use, time therefore movable in the wild and inconvenient water purification use.In addition, because the contact surface of forward osmosis membrane and former water only has a face, infiltrating area is little, and the efficiency of water purification is also just little; Be provided with water-purifying cavity and need adding of water purification, and under some dislikes cruel environment, just can not find water purification at all, hinder the carrying out of purificating raw water.And the topmost defect of the cleaning water bag of this application is: under field environment, the complicacy of raw water quality determines the complicacy that forward osmosis membrane pollutes, if the pollutent that forward osmosis membrane retains can not effectively be removed, be cleaning water bag life-span of core will be subject to extreme influence with forward osmosis membrane, but this cleaning water bag structure is closed, inconvenience cleaning, can not solve this problem.
Therefore, be necessary to develop a kind of easy to clean, efficient, can the Portable positive penetrating cleaning water bag of repeatedly Reusability.
Summary of the invention
In view of this, the invention provides a kind of cleaning water high and be particularly suitable for the Portable positive penetrating cleaning water bag of field usage.
For achieving the above object, technical scheme of the present invention is:
A kind of Portable positive penetrating cleaning water bag, comprise for the former water of splendid attire outer bag and be located at the inner bag drawing liquid in outer bag for splendid attire, described outer bag is waterproof material, and described inner bag is forward osmosis membrane material.
Above-mentioned cleaning water bag inner bag is that 360 ° of full solids contact with the former water in outer bag, and infiltrating area is large, and cleaning water is high.In use procedure, no matter cleaning water bag is keep flat or be sidelong, and all sustainablely carries out water purification, easy to carry, not by outdoorsman restriction.Water-proof material that outer bag uses, preferably nontoxic, stable in properties, there is certain tenacity.During use, the former water in outer bag automatically enters in inner bag under permeable pressure head, the water be namely purified; Adopt edible hypertonic solution (solution as high protein, high sugar) owing to drawing liquid, the water of purification mixes with the liquid that draws in inner bag, makes to draw liquid and is diluted, capable of direct drinking, also reaches the object of supplementing energy simultaneously.And, when external environment allows, inner bag can also be taken out, directly be placed in former water and realize water purifying, use more convenient.
Further, described outer bag is provided with outer bag water-in on one side thereof, and opposite side is provided with outer bag water outlet; Described inner bag is provided with inner bag water-in on the side that it is contrary with outer bag water inlet position, and opposite side is provided with inner bag water outlet.Intake-outlet the injection and the releasing that facilitate former water or draw liquid are set, the more important thing is the cleaning facilitating cleaning water bag.Particularly, due to water-in that outer bag and inner bag are crisscross arranged respectively and water outlet, when cleaning, in outer bag water-in and inner bag water-in, pass into scavenging solution (being directly such as water purification) rinse simultaneously, under the shearing force that inside and outside rinsing liq cross-flow produces, namely the dirt that forward osmosis membrane surface retains is removed fast, thus reaches regeneration, effectively extends the work-ing life of cleaning water bag.
Further, the intake-outlet in described outer bag is located at the two ends of outer bag respectively; Intake-outlet on described inner bag is located at the two ends of inner bag respectively.More optimizedly, the intake-outlet in described outer bag is that diagonal angle is arranged; Intake-outlet on described inner bag is that diagonal angle is arranged.Cleaning water bag can be made like this when cleaning, and it is the longest the widest to enter the distance that the wash water in interior outer bag flows through, and can reach better cleaning performance.
Further, described inner bag is covered with filter screen, or is provided with filter screen between outer bag and inner bag.Filter screen can retain larger-size pollutent in former water, plays macrofiltration, also can prevent suddenly extruding or impact the lower destruction that may cause to internal bag, thus alleviates the detrimentally affect that inner bag is subject to.In addition, when cleaning, filter screen can make the scavenging solution in outer bag form turbulent flow, improves cleaning performance.Preferably, described filter screen adopts fiber textile material to make, detachably, concrete as the detachable nylon leaching net of 20 object.
Further, described outer bag has sealable seam or mouth.This seam or mouth can facilitate the taking-up of inner bag and filter screen, are convenient to inner bag and are used alone or filter screen clean; When inner bag and filter screen are put back to after in outer bag, this seam or mouth seal again, and outer bag can use by the former water of splendid attire again together with inner bag.
Further, described inner bag is made up of three cellulose acetate membrane or polyamide membrane.Three cellulose acetate membrane and polyamide membrane are all forward osmosis membranes, and the present invention does not get rid of the use of other forward osmosis membranes yet.
Further, glucose or fructose soln that liquid is high osmotic pressure is drawn described in.This draws the hydration of liquid and purification also, capable of direct drinking, also plays the effect of supplementing energy simultaneously.
Further, described cleaning water bag also comprise with described inner bag and outer bag intake-outlet with the use of three way type sebific duct.When cleaning cleaning water bag, water connected by a pipe of three way type sebific duct, and other two pipes connect the water-in of outer bag and the water-in of inner bag respectively, thus realizes outer bag in the flushing of water flowing simultaneously.
Two of object of the present invention is to provide a kind of process for purifying water of Portable positive penetrating cleaning water bag, and the method cleaning water is high, is particularly suitable for field environment.
For achieving the above object, technical scheme of the present invention is:
A kind of process for purifying water of Portable positive penetrating cleaning water bag, utilize above-mentioned Portable positive penetrating cleaning water bag, comprise following step of carrying out: inject in described inner bag and draw liquid, former water is injected in outer bag, water molecules in former water enters inner bag under the driving of permeable pressure head, namely obtains water purification in inner bag; Or inject in described inner bag and draw liquid, taken out from outer bag by inner bag and be directly placed in former water, the water molecules in former water enters inner bag under the driving of permeable pressure head, namely obtains water purification in inner bag.Described former water is mainly the water source of the not clear water quality being present in field or the water source by slight pollution, as rainwater, river, lake water etc.
Above-mentioned two kinds of different water purification modes, the former is the unseparated use of inside and outside bag, is particularly suitable for the situation that cleaning water bag is carried with or place, water source envrionment conditions is more severe.The more severe situation of described envrionment conditions is as extremely cold environment, temperature is the important factor affecting positive osmotic water flux, temperature raises and water production rate in the unit time can be made to increase, therefore interior outer bag regardless of from time, after outer bag can being injected at the former water that temperature is extremely low, again inside and outside bag is together placed in the higher environment of temperature, former water temp is raised, increase water production rate.An aspect of the low just bad environments of envrionment temperature, here bad environments is that general reference is unsuitable for just permeating the field environment condition of carrying out smoothly.The latter is the use that inside and outside bag is separated, and is particularly suitable for the situation that envrionment conditions is comparatively suitable for.When cleaning water bag is provided with filter screen, filter screen and inner bag can take out use simultaneously, and filter screen shields to internal bag.After using, rapidly inner bag and filter screen are loaded in outer bag, discharge air wherein, close the seam in outer bag or mouth.In inner bag by dilute to draw liquid capable of direct drinking or preserve in addition.
Further, when described inner bag be placed in outer bag carry out water purification time, described cleaning water bag is placed in hot environment or ballast above described outer bag.No matter whether field environment is required, so all can further improve cleaning water, shortens and produces the water time.
Three of object of the present invention is to provide a kind of cleaning method of Portable positive penetrating cleaning water bag, and the method effectively can remove the pollutent that forward osmosis membrane surface retains, and extends the work-ing life of cleaning water bag.
For achieving the above object, technical scheme of the present invention is:
A kind of cleaning method of Portable positive penetrating cleaning water bag, utilize above-mentioned Portable positive penetrating cleaning water bag, comprise following step of carrying out: all intake-outlets opening outer bag and inner bag, pass into scavenging solution respectively to outer bag water-in and inner bag water-in simultaneously, continual rinsing, the shearing force that the pollutent on forward osmosis membrane surface produces because of cross-flow is removed.
Further, pass into scavenging solution by three way type sebific duct respectively to described outer bag water-in and inner bag water-in simultaneously.
Described scavenging solution is preferably tap water or the cleaner water of degree of purification, and keeps higher speed, and the shearing force that the pollutent on forward osmosis membrane surface borrows water cross-flow to produce is removed, and general flushing can reach cleaning effect in 5 minutes.When cleaning water bag is provided with filter screen, after the flushing of forward osmosis membrane can be completed, then take out filter screen it is cleaned separately.Because forward osmosis membrane itself has the lower advantage of pollution, so cleaning water bag continuous several times can use, until clean after having the condition of cleaning water when cleaning again under general condition in the wild.
Advantageous Effects of the present invention is:
Cleaning water bag of the present invention; 1) structure of interior outer bag is designed to; can not only available protecting inner bag; guarantee that cleaning water bag can repeatedly Reusability; can also conveniently for cleaning water bag provides the suitable condition being beneficial to and producing water; as the cleaning water bag producing drinking-water is placed in the higher environment of temperature, or press certain weight etc. above outer bag, produce the water time to shorten.2) intake-outlet inner bag and outer bag are crisscross arranged, conveniently carries out cross-flow cleaning to contaminated film, effectively removes the pollutent that its surface retains, thus extends the work-ing life of cleaning water bag.To sum up, cleaning water bag cleaning water of the present invention is high, use and easy to clean, long service life, is particularly suitable for field usage, concrete as the use in the situations such as officers and men or personnel execute the task in the wild.
Accompanying drawing explanation
Fig. 1 is the structural representation of the interior outer bag of cleaning water bag of the present invention when not being separated;
Structural representation when Fig. 2 is the interior outer bag separation of cleaning water bag of the present invention;
Fig. 3 is the structure for amplifying schematic diagram of the three way type sebific duct of cleaning water bag of the present invention.
Embodiment
Describe the present invention referring to accompanying drawing.
As depicted in figs. 1 and 2, a kind of Portable positive penetrating cleaning water bag of the present invention, comprise for the former water of splendid attire outer bag 1 and be located at the inner bag 5 drawing liquid in outer bag 1 for splendid attire, described outer bag 1 is waterproof material, and described inner bag 5 is forward osmosis membrane material.Described outer bag 1 is provided with outer bag water-in 21 and outer bag inlet seal lid 22 on one end, and the other end is provided with outer bag water outlet 31 and outer bag water outlet sealing cover 32; Described inner bag 5 is provided with inner bag water-in 61 and inner bag inlet seal lid 62 on one end that it is contrary with outer bag water-in 21 position, and the other end is provided with inner bag water outlet 71 and inner bag water outlet sealing cover 72.Described inner bag 5 is covered with dismountable filter screen 4.Described outer bag 1 has sealable seam.Described inner bag 5 is made up of three cellulose acetate membrane or polyamide membrane.Describedly draw the glucose or fructose soln that liquid is high osmotic pressure.
As shown in Figure 3, also coordinate with above-mentioned cleaning water bag and be provided with three way type sebific duct 8.
Above-mentioned cleaning water bag in use, has two kinds of use-patterns:
Mode one, is applicable to the situation that cleaning water bag is carried with or place, water source envrionment conditions is more severe.Comprise following step of carrying out: close inner bag water outlet sealing cover 72, inject appropriate high density from inner bag water-in 61 and draw liquid, close inner bag inlet seal lid 62.Close outer bag water-in 21 sealing cover, inject former water from outer bag water outlet 31, when outer bag 1 volume reaches maximum, stop water filling, then, close outer bag 1 water outlet sealing cover.Cleaning water bag is placed in optimal temperature environment some hours, the water molecules in former water diffuses to and draws liquid under the driving of osmotic pressure, and filter screen 4 can retain the pollutent of large-size in former water, to alleviate the detrimentally affect that inner bag 5 is subject to.In the process, a weight also can be pressed in outer bag 1 to promote process of osmosis, when inner bag 5 is expanded to volume required, open inner bag water outlet sealing cover 72, can for directly drinking or preserving in addition by the liquid that draws diluted.
Mode two, is applicable to the situation that envrionment conditions is comparatively suitable for.Comprise following step of carrying out: open the seam in outer bag 1, therefrom take out the filter screen 4 of inner bag 5 and parcel inner bag 5, close inner bag water outlet sealing cover 72, inject appropriate high density from inner bag water-in 61 and draw liquid, then close inner bag inlet seal lid 62.Inner bag 5 and filter screen 4 are together placed in water source, after some hours, take out inner bag 5, open inner bag water outlet sealing cover 72, wherein drawn liquid and capable of direct drinking or preserve in addition by what dilute.After using, rapidly inner bag 5 and filter screen 4 are loaded in outer bag 1, discharge air wherein, close the seam of outer bag 1.
During cleaning cleaning water bag, open all sealing covers, one end of three way type sebific duct 8 is connected with water tap, two ends are connected with inner bag water-in 61 with outer bag water-in 21 respectively in addition, open water tap, form cross-flow using tap water as scavenging solution in inside and outside two faces of inner bag 5 and rinse current, the shearing force produced by cross-flow current rinses the pollutent removing film surface.Now, filter screen 4 can make the scavenging solution in outer bag 1 form turbulent flow, improves cleaning performance, general scavenging period 5 minutes, after having cleaned, closes inner bag water outlet sealing cover 72, inject appropriate amount of purified water from inner bag water-in 61, after jog after 2 minutes, pour out pure water.After completing the flushing of forward osmosis membrane, then take out filter screen 4 it is cleaned separately, and then reinstall in cleaning water bag.
Water bag, when not using, must be discharged air in bag, and close all sealing covers, keeps inner bag 5 to be hedged off from the outer world, should deposit a little pure water, become dry to avoid forward osmosis membrane dehydration in inner bag 5.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. a Portable positive penetrating cleaning water bag, it is characterized in that: comprise for the former water of splendid attire outer bag (1) and be located at the inner bag (5) drawing liquid in outer bag (1) for splendid attire, described outer bag (1) is waterproof material, and described inner bag (5) is forward osmosis membrane material.
2. Portable positive penetrating cleaning water bag according to claim 1, is characterized in that: described outer bag (1) is provided with outer bag water-in (21) on one side thereof, and opposite side is provided with outer bag water outlet (31); Described inner bag (5) is provided with inner bag water-in (61) on the side that it is contrary with outer bag water-in (21) position, and opposite side is provided with inner bag water outlet (71).
3. Portable positive penetrating cleaning water bag according to claim 1, is characterized in that: described inner bag (5) is covered with filter screen (4), or is provided with filter screen (4) between outer bag (1) and inner bag (5).
4. Portable positive penetrating cleaning water bag according to claim 1, is characterized in that: (1) has sealable seam or mouth to described outer bag.
5. Portable positive penetrating cleaning water bag according to claim 1, is characterized in that: described inner bag (5) is made up of three cellulose acetate membrane or polyamide membrane.
6. Portable positive penetrating cleaning water bag according to claim 1, is characterized in that: described in draw the glucose or fructose soln that liquid is high osmotic pressure.
7. the process for purifying water of a Portable positive penetrating cleaning water bag, it is characterized in that, utilize the Portable positive penetrating cleaning water bag described in any one of claim 1-6, comprise following step of carrying out: inject in described inner bag (5) and draw liquid, former water is injected in outer bag (1), water molecules in former water enters inner bag (5) under the driving of permeable pressure head, and namely inner bag obtains water purification in (5); Or, inject in described inner bag (5) and draw liquid, inner bag (5) taking-up from outer bag (1) is directly placed in former water, water molecules in former water enters inner bag (5) under the driving of permeable pressure head, and namely inner bag obtains water purification in (5).
8. the process for purifying water of Portable positive penetrating cleaning water bag according to claim 7, it is characterized in that: when described inner bag (5) be placed in outer bag (1) carry out water purification time, described cleaning water bag is placed in hot environment or described outer bag (1) top ballast.
9. the cleaning method of a Portable positive penetrating cleaning water bag, it is characterized in that, utilize the Portable positive penetrating cleaning water bag described in any one of claim 2-6, comprise following step of carrying out: all intake-outlets opening outer bag (1) and inner bag (5), pass into scavenging solution respectively to outer bag water-in (21) and inner bag water-in (61) simultaneously, continual rinsing, the shearing force that the pollutent on forward osmosis membrane surface produces because of cross-flow is removed.
10. the cleaning method of Portable positive penetrating cleaning water bag according to claim 9, is characterized in that: pass into scavenging solution by three way type sebific duct respectively to described outer bag water-in (21) and inner bag water-in (61) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410721172.8A CN104478042B (en) | 2014-12-02 | 2014-12-02 | A kind of Portable positive penetrating cleaning water bag and use thereof and cleaning method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410721172.8A CN104478042B (en) | 2014-12-02 | 2014-12-02 | A kind of Portable positive penetrating cleaning water bag and use thereof and cleaning method |
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| CN104478042A true CN104478042A (en) | 2015-04-01 |
| CN104478042B CN104478042B (en) | 2017-01-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108128851A (en) * | 2018-01-26 | 2018-06-08 | 重庆三峡学院 | A kind of method for recycling sodium chloride solution in preserved szechuan pickle waste water with high salt |
| CN108485963A (en) * | 2018-03-05 | 2018-09-04 | 中山大学附属第医院 | A kind of 3D printing ink bag |
| CN109126473A (en) * | 2018-10-11 | 2019-01-04 | 江南大学 | A kind of alleviation forward osmosis membrane pollution method in situ removed based on calcium ions and magnesium ions |
| CN109319886A (en) * | 2018-11-15 | 2019-02-12 | 中国人民解放军陆军工程大学 | Bear Portable positive penetrating water purifier |
| CN112758504A (en) * | 2020-12-15 | 2021-05-07 | 李慧芳 | Spicy duck intestine vacuum packaging bag with spicy degree adjusting function |
| CN113968632A (en) * | 2021-09-29 | 2022-01-25 | 北京交通大学 | Water purifying bag |
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| CN101746848A (en) * | 2008-12-12 | 2010-06-23 | 同济大学 | Dynamic film separating method for processing sewage by using biological diatomite |
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| CN2033400U (en) * | 1988-06-02 | 1989-03-01 | 薛小民 | Osmose type desalination device of seawater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108128851A (en) * | 2018-01-26 | 2018-06-08 | 重庆三峡学院 | A kind of method for recycling sodium chloride solution in preserved szechuan pickle waste water with high salt |
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| CN108485963B (en) * | 2018-03-05 | 2021-03-26 | 中山大学附属第一医院 | 3D prints ink bag |
| CN109126473A (en) * | 2018-10-11 | 2019-01-04 | 江南大学 | A kind of alleviation forward osmosis membrane pollution method in situ removed based on calcium ions and magnesium ions |
| CN109319886A (en) * | 2018-11-15 | 2019-02-12 | 中国人民解放军陆军工程大学 | Bear Portable positive penetrating water purifier |
| CN112758504A (en) * | 2020-12-15 | 2021-05-07 | 李慧芳 | Spicy duck intestine vacuum packaging bag with spicy degree adjusting function |
| CN113968632A (en) * | 2021-09-29 | 2022-01-25 | 北京交通大学 | Water purifying bag |
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|---|---|
| CN104478042B (en) | 2017-01-04 |
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