CN105413473B - A kind of water process membrane stack - Google Patents
A kind of water process membrane stack Download PDFInfo
- Publication number
- CN105413473B CN105413473B CN201510985976.3A CN201510985976A CN105413473B CN 105413473 B CN105413473 B CN 105413473B CN 201510985976 A CN201510985976 A CN 201510985976A CN 105413473 B CN105413473 B CN 105413473B
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- China
- Prior art keywords
- disc
- sealing ring
- pvdf
- type diaphragm
- collector pipe
- Prior art date
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- 239000012528 membrane Substances 0.000 title claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 21
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 238000009434 installation Methods 0.000 claims abstract description 19
- 210000004379 membrane Anatomy 0.000 claims description 48
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 40
- 239000002033 PVDF binder Substances 0.000 claims description 37
- 210000002469 basement membrane Anatomy 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 13
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 6
- 239000003125 aqueous solvent Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 4
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 4
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 4
- BCNBMSZKALBQEF-UHFFFAOYSA-N 1,3-dimethylpyrrolidin-2-one Chemical compound CC1CCN(C)C1=O BCNBMSZKALBQEF-UHFFFAOYSA-N 0.000 claims description 3
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 3
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 3
- 239000012498 ultrapure water Substances 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims 3
- 239000008199 coating composition Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 7
- -1 dimethyl formyl Amine Chemical class 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 150000004040 pyrrolidinones Chemical class 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/082—Flat membrane modules comprising a stack of flat membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/10—Supported membranes; Membrane supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/38—Polyalkenylalcohols; Polyalkenylesters; Polyalkenylethers; Polyalkenylaldehydes; Polyalkenylketones; Polyalkenylacetals; Polyalkenylketals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/06—External membrane module supporting or fixing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2315/00—Details relating to the membrane module operation
- B01D2315/06—Submerged-type; Immersion type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/36—Hydrophilic membranes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of novel membrane for water treatment heaps, including disc-type diaphragm, sealing ring, retainer plate and collector pipe, wherein, there is size and the matched installation through-hole of pipe outside diameter that catchments in the middle part of disc-type diaphragm, sealing ring is matched with the installation through-hole, has multiple ostium excurrens on collector pipe；N number of disc-type diaphragm is spaced heap row successively with the N+1 sealing rings, every 2 sealing rings is made to clamp 1 disc-type diaphragm, and sealing ring is corresponding with installation through-hole position, the collector pipe passes through installation through-hole and sealing ring inner ring to concatenate all disc-type diaphragms and sealing ring, and respectively all disc-type diaphragms and sealing ring are fixed on collector pipe using a retainer plate in the sealing ring position at both ends.It is of the invention to use disc-type diaphragm, and be in barrel mast shape by the setting of all diaphragms using tandem, composition surrounding feed liquor is handled, the structure of central water outlet, on the basis of sufficient film contact area is ensured, greatly reduces membrane stack occupancy volume.
Description
Technical field
The present invention relates to water-treatment technology field, in particular, referring to a kind of water process membrane stack.
Background technology
Membrane technology is known as the water technology of 21 century, increasingly rapid developing in the past 40 years.With traditional water process skill
Art is compared, and membrane technology has many advantages, such as that energy saving, small investment, easy to operate, treatment effeciency is high, and application brings huge to the mankind
Environment and economic benefit.Membrane technology being of wide application in water process is general, can be not only used for drinking water treatment and can also be used for
Wastewater treatment also has in terms of the water process of certain special industries and sets foot in.
During application of membrane, fouling membrane is the largest problem.With the extension of usage time, pollutant absorption exists
Film surface by accumulating for a long time, can cause Pore Blocking, reduce film process performance.And such case has become at embrane method water
One of bottleneck in science and engineering skill.And there is typically further volume is big, occupation of land is more, treatment effect is bad, operating cost for existing membrane stack
The problem of high.
Therefore, how to improve the antifouling property of membrane stack becomes the subject of those skilled in the art's primary study.
Invention content
Of the existing technology to overcome the problems, such as, the present invention provides a kind of high treating effect, energy-efficient membrane for water treatment
Heap.
To achieve these goals, the technical solution adopted by the present invention is as follows：
A kind of water process membrane stack, including disc-type diaphragm, sealing ring, retainer plate and collector pipe, wherein, in disc-type diaphragm
Portion has size and the matched installation through-hole of pipe outside diameter that catchments, sealing ring are matched with the installation through-hole, has on collector pipe multiple
Ostium excurrens；N number of disc-type diaphragm is spaced heap row successively with the N+1 sealing rings, and every 2 sealing rings is made to clamp 1
Disc-type diaphragm, and sealing ring is corresponding with installation through-hole position, the collector pipe passes through installation through-hole and sealing ring inner ring by institute
There are disc-type diaphragm and sealing ring concatenation, and a retainer plate is respectively used by all disc-type diaphragms in the sealing ring position at both ends
It is fixed on collector pipe with sealing ring, the ostium excurrens are located at the position that collector pipe is equipped with disc-type diaphragm.The sealing
It encloses as two-way sealing ring.
In order to increase effective membrane area in related volume, the spacing between the adjacent disc-type diaphragm is 2~5mm.
In order to improve water outlet efficiency, the aperture of the ostium excurrens is no more than the thickness of disc-type diaphragm.
In order to improve the water yield of membrane stack entirety, as a preferred embodiment, the outer diameter of the collector pipe is 30mm.
Specifically, in order to which treatment function is better achieved, the disc-type diaphragm includes stacking gradually and suppressing up and down
Run through all modifications in the modified PVDF membrane of disk shape, support flow-guiding screen and modified PVDF membrane and at the disk shape center
The installation through-hole of pvdf membrane and support flow-guiding screen, the peripheral edge of two layers of modified PVDF membrane up and down are compressed to the one of closing
Body；The ostium excurrens are connected with support flow-guiding screen.
Further, the modified PVDF membrane is by PVDF basement membranes and the composite modified painting in PVDF membrane surfaces coating
Layer is formed.
Wherein, the PVDF basement membranes are made of the casting solution that the component of following mass percent is formed：
PVDF 16~30%, glycol monoethyl ether 15~20%, polyvinylpyrrolidone 20~25%, dimethyl formyl
Amine 2~5%, dimethyl pyrrolidone 10~15%, dimethyl sulfoxide (DMSO) 7~12%.
Also, the PVDF basement membranes are made by following process：
After each component material of casting solution is mixed according to quantity, 24~36h is stirred under 65~100 DEG C of temperature condition to molten
Solution is uniform, forms casting solution；Then by manufactured casting solution on a glass, striking is into first film, and in 15~25 DEG C of item
Solidification forming under part；Automatically disengage glass plate after first film forming, then first film is placed in ultra-pure water impregnate 12~for 24 hours, it is and every
A water is changed every 3h, finally cleans and obtains PVDF basement membranes.
Further, the composite modified reagent that the composite modified coating is coated by the PVDF membrane surfaces after cleaning
It is formed after drying.
Specifically, polyvinyl alcohol of the composite modified reagent by 7~20% mass percents, 2~15% mass hundred
Divide maleic anhydride, the dicumyl peroxide of 0.1~1% mass percent and the polyethylene pyrrole of 0~3.8% mass percent of ratio
The solute uniform dissolution that pyrrolidone is formed is made in ultrapure aqueous solvent.
Compared with prior art, the invention has the advantages that：
(1) present invention uses disc-type diaphragm, and is in barrel mast shape by the setting of all diaphragms using tandem, forms surrounding
Feed liquor processing, the structure of central water outlet on the basis of sufficient film contact area is ensured, greatly reduce membrane stack and occupy body
Product, and the diaphragm of specially treated also greatly strengthens the antifouling property and water penetration of film surface, improves water process
Can, and present inventive concept is novel, and it is simple in structure, it is of low cost, it is convenient and practical, it is with a wide range of applications, is suitble to promote
Using.
(2) present invention improves the suppleness of diaphragm also using basement membrane made of special material, and bending is unlikely to deform,
Surface is smooth, and the water turbulence effect that can improve film surface reduces concentration polarization, while the hole formed on film is in porous sea
Continuous reticular structure substantially increases blocking up property of anti-pollution, also carries out current potential processing to film surface by modifying agent, makes it more hydrophilic
Property, and film adhesion is strong, is not readily separated peeling.
(3) present invention uses the diaphragm structure of three-decker, by the water purification after the pvdf membrane filtering of outer two layers in
Between interlayer support flow-guiding screen at flow into centre, the design of two-way sealing ring makes the water after filtering can only be from collector pipe
Ostium excurrens enter in collector pipe and collect, and change previous filtering water-out manners, show unique characteristics.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the side structure schematic view of the present invention.
Fig. 3 is the sectional view of diaphragm in the present invention.
Fig. 4 is the structure diagram of modified PVDF membrane in the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention include but not limited to
The following example.
Embodiment
As shown in Figures 1 to 4, the water process membrane stack, including disc-type diaphragm 1, sealing ring 2, retainer plate 3 and collector pipe 4,
Wherein, there is size and the matched installation through-hole 11 of pipe outside diameter that catchments, sealing ring and the installation through-hole in the middle part of disc-type diaphragm
Match, there are multiple ostium excurrens on collector pipe；N number of disc-type diaphragm is spaced heap row successively with the N+1 sealing rings, makes
Every 2 sealing rings clamp 1 disc-type diaphragm, and sealing ring is corresponding with installation through-hole position, and the collector pipe passes through installation logical
Hole and sealing ring inner ring concatenate all disc-type diaphragms and sealing ring, and are respectively fixed in the sealing ring position at both ends using one
All disc-type diaphragms and sealing ring are fixed on collector pipe by circle, and the ostium excurrens are located at collector pipe equipped with disc-type film
The position of piece.N is the integer more than 1.The sealing ring is two-way sealing ring.
In order to increase effective membrane area in related volume, the spacing between the adjacent disc-type diaphragm is 2~5mm.
In order to improve water outlet efficiency, the aperture of the ostium excurrens is no more than the thickness of disc-type diaphragm.In order to improve membrane stack entirety
Water yield, as a preferred embodiment, the outer diameter of the collector pipe is 30mm.
Specifically, in order to which treatment function is better achieved, the disc-type diaphragm includes stacking gradually and suppressing up and down
Run through all in the modified PVDF membrane 12 of disk shape, support flow-guiding screen 13 and modified PVDF membrane and at the disk shape center
The installation through-hole 11 of modified PVDF membrane and support flow-guiding screen, the peripheral edge of two layers of modified PVDF membrane up and down are compressed to closing
One；The ostium excurrens are connected with support flow-guiding screen.
Further, the modified PVDF membrane is by PVDF basement membranes 14 and in the composite modified of PVDF membrane surfaces coating
Coating 15 is formed.
Wherein, the PVDF basement membranes are made of the casting solution that the component of following mass percent is formed：
PVDF 16~30%, glycol monoethyl ether 15~20%, polyvinylpyrrolidone 20~25%, dimethyl formyl
Amine 2~5%, dimethyl pyrrolidone 10~15%, dimethyl sulfoxide (DMSO) 7~12%.
Also, the PVDF basement membranes are made by following process：
After each component material of casting solution is mixed according to quantity, 24~36h is stirred under 65~100 DEG C of temperature condition to molten
Solution is uniform, forms casting solution；Then by manufactured casting solution on a glass, striking is into first film, and in 15~25 DEG C of item
Solidification forming under part；Automatically disengage glass plate after first film forming, then first film is placed in ultra-pure water impregnate 12~for 24 hours, it is and every
A water is changed every 3h, finally cleans and obtains PVDF basement membranes.
Further, the composite modified reagent that the composite modified coating is coated by the PVDF membrane surfaces after cleaning
It is formed after drying.Specifically, polyvinyl alcohol of the composite modified reagent by 7~20% mass percents, 2~15% mass
The polyethylene of the maleic anhydride of percentage, the dicumyl peroxide of 0.1~1% mass percent and 0~3.8% mass percent
The solute uniform dissolution that pyrrolidones is formed is made in ultrapure aqueous solvent.It is when preparing composite modified reagent, above-mentioned solute is molten
Solution is in 80 ± 3 DEG C of ultrapure aqueous solvent, using at the uniform velocity blender by the speed of 75~150rad/min to above-mentioned mixed solution
15~25min is stirred, is sufficiently mixed each component, forms gluing state.
PVDF basement membranes are washed with distilled water totally, 2h is then stood in gnotobasis；Compound by gluing state changes
Property reagent is evenly applied to PVDF membrane surfaces, the naturally dry at a temperature of 25 ± 3 DEG C.
Above-described embodiment is merely a preferred embodiment of the present invention, and it is not intended to limit the protection scope of the present invention, as long as using
The design principle of the present invention and the variation for carrying out non-creative labour on this basis and making, should all belong to the present invention's
Within protection domain.
Claims (7)
1. a kind of water process membrane stack, which is characterized in that including disc-type diaphragm, sealing ring, retainer plate and collector pipe, wherein, dish
There is size and the matched installation through-hole of pipe outside diameter that catchments, sealing ring is matched with the installation through-hole, collector pipe in the middle part of chip diaphragm
It is upper that there are multiple ostium excurrens；N number of disc-type diaphragm is spaced heap row successively with the N+1 sealing rings, makes every 2 sealings
Circle 1 disc-type diaphragm of clamping, and sealing ring is corresponding with installation through-hole position, the collector pipe passes through installation through-hole and sealing ring
Inner ring concatenates all disc-type diaphragms and sealing ring, and respectively uses a retainer plate by all dish in the sealing ring position at both ends
Chip diaphragm and sealing ring are fixed on collector pipe, and the ostium excurrens are located at the position that collector pipe is equipped with disc-type diaphragm；
Spacing between the adjacent disc-type diaphragm is 2~5mm；The aperture of the ostium excurrens is no more than the thickness of disc-type diaphragm
Degree；
The disc-type diaphragm includes stacking gradually up and down and suppressing the modified PVDF membrane in disk shape, supports flow-guiding screen and modification
Pvdf membrane, the installation through-hole through all modified PVDF membranes and support flow-guiding screen at the disk shape center, and described upper and lower two
The peripheral edge of layer modified PVDF membrane is compressed to the one of closing；The ostium excurrens are connected with support flow-guiding screen.
2. water process membrane stack according to claim 1, which is characterized in that the outer diameter of the collector pipe is 30mm.
3. according to claim 1~2 any one of them water process membrane stack, which is characterized in that the modified PVDF membrane is by PVDF
Basement membrane and the composite modified coating composition in PVDF membrane surfaces coating.
4. water process membrane stack according to claim 3, which is characterized in that the PVDF basement membranes are by following mass percent
The casting solution that component is formed is made：
PVDF 16~30%, glycol monoethyl ether 15~20%, polyvinylpyrrolidone 20~25%, dimethylformamide 2~
5%, dimethyl pyrrolidone 10~15%, dimethyl sulfoxide (DMSO) 7~12%.
5. water process membrane stack according to claim 4, which is characterized in that the PVDF basement membranes are made by following process：
After each component material of casting solution is mixed according to quantity, it is equal to dissolving that 24~36h is stirred under 65~100 DEG C of temperature condition
It is even, form casting solution；Then by manufactured casting solution on a glass, striking is into first film, and under conditions of 15~25 DEG C
Solidification forming；Automatically disengage glass plate after first film forming, then first film is placed in ultra-pure water impregnate 12~for 24 hours, and every 3h
A water is changed, finally cleans and obtains PVDF basement membranes.
6. water process membrane stack according to claim 3, which is characterized in that the composite modified coating is by after cleaning
The composite modified reagent of PVDF membrane surfaces coating is formed after drying.
7. water process membrane stack according to claim 6, which is characterized in that the composite modified reagent is by 7~20% mass
The polyvinyl alcohol of percentage, the maleic anhydride of 2~15% mass percents, 0.1~1% mass percent dicumyl peroxide
The solute uniform dissolution formed with the polyvinylpyrrolidone of 0~3.8% mass percent is made in ultrapure aqueous solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510985976.3A CN105413473B (en) | 2015-12-25 | 2015-12-25 | A kind of water process membrane stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510985976.3A CN105413473B (en) | 2015-12-25 | 2015-12-25 | A kind of water process membrane stack |
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| Publication Number | Publication Date |
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| CN105413473A CN105413473A (en) | 2016-03-23 |
| CN105413473B true CN105413473B (en) | 2018-06-08 |
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| CN201510985976.3A Active CN105413473B (en) | 2015-12-25 | 2015-12-25 | A kind of water process membrane stack |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617865B (en) * | 2016-04-05 | 2018-03-02 | 成都美富特膜科技有限公司 | A kind of water process membrane stack of high efficiency filter |
| CN108771972A (en) * | 2018-05-30 | 2018-11-09 | 江苏八达科技股份有限公司 | A kind of membrane filtration module |
| CN110314552A (en) * | 2019-06-28 | 2019-10-11 | 湖北百清环保技术有限公司 | A kind of stacked ultra-filtration membrane device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921314A (en) * | 2012-10-25 | 2013-02-13 | 贵阳时代沃顿科技有限公司 | Compound reverse osmosis membrane with interpenetrating network desalting layer and preparation method of membrane |
| CN103224302A (en) * | 2013-04-09 | 2013-07-31 | 南京国能环保工程有限公司 | Treatment method of disc type column membrane water and device |
| CN104984663A (en) * | 2015-06-15 | 2015-10-21 | 黄义忠 | Film casting liquid for PVDF flat membrane and preparing method for PVDF flat membrane |
| CN205216597U (en) * | 2015-12-25 | 2016-05-11 | 成都美富特膜科技有限公司 | Novel water treatment membrane stack |
-
2015
- 2015-12-25 CN CN201510985976.3A patent/CN105413473B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102921314A (en) * | 2012-10-25 | 2013-02-13 | 贵阳时代沃顿科技有限公司 | Compound reverse osmosis membrane with interpenetrating network desalting layer and preparation method of membrane |
| CN103224302A (en) * | 2013-04-09 | 2013-07-31 | 南京国能环保工程有限公司 | Treatment method of disc type column membrane water and device |
| CN104984663A (en) * | 2015-06-15 | 2015-10-21 | 黄义忠 | Film casting liquid for PVDF flat membrane and preparing method for PVDF flat membrane |
| CN205216597U (en) * | 2015-12-25 | 2016-05-11 | 成都美富特膜科技有限公司 | Novel water treatment membrane stack |
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| CN105413473A (en) | 2016-03-23 |
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