CN104923084B - Internal-external pressure pre-coating type dynamic membrane support and dynamic membrane system - Google Patents
Internal-external pressure pre-coating type dynamic membrane support and dynamic membrane system Download PDFInfo
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- CN104923084B CN104923084B CN201510354291.9A CN201510354291A CN104923084B CN 104923084 B CN104923084 B CN 104923084B CN 201510354291 A CN201510354291 A CN 201510354291A CN 104923084 B CN104923084 B CN 104923084B
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- Prior art keywords
- dynamic membrane
- support body
- membrane support
- space
- card
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- 239000012528 membrane Substances 0.000 title claims abstract description 92
- 239000011248 coating agent Substances 0.000 title abstract description 4
- 238000000576 coating method Methods 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 235000012431 wafers Nutrition 0.000 claims description 46
- 239000000463 material Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 description 23
- 230000000694 effects Effects 0.000 description 9
- 239000012752 auxiliary agent Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000001471 micro-filtration Methods 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000000275 quality assurance Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000002552 dosage form Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000004531 microgranule Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides an internal-external pressure pre-coating type dynamic membrane support comprising a plurality of ring sheets. The ring sheets are overlapped along the Z-axis direction and assembled and fixed through rod pieces, and a clearance is formed between every two adjacent ring sheets.
Description
Technical field
The present invention relates to dynamic membrane system, more particularly to a kind of interior external pressure precoating formula dynamic membrane support body and dynamic membrane system
System.
Background technology
Into 21 century, water process application of membrane separation technology is more and more extensive.Dynamic membrane separation technology, throws as tool is relative
Money low cost, fouling membrane are easily controlled, and low power consumption and other advantages become when cephacoria study hotspot.
Dynamic Membrane (Dynamic membrane) can become time filming (second membrane) again, refer to by pre-
The new film that varnish or activated sludge are formed in micro-filtration membrane, ultrafilter membrane or large aperture supporting body surface.The formation of Dynamic Membrane can subtract
Slow micro-filtration membrane, ultrafiltration face blocking (Block) and fouling membrane (Fouling), or the interception capacity for improving macropore supporter.Dynamic
Film is generally divided into from filming and pre-coating film two types, needs only rely upon material in detached mixed liquor from filming, and pre-coating film
Then need in detached water to add one or more specific components material, formed by direct or precoating circulation.
Can be many as the material of dynamic membrane support body and dynamic membrane device form, for example it is, fine with organic material acetic acid
Dimension element, polyacrylonitrile (PAN), Kynoar (PVDF), polrvinyl chloride (PVC), sintering polyethylene (PE), polysulfones (PS) etc.,
And inorganic material sintering ceramics, the micro-filtration membrane of the support such as sintering metal microgranule filter stick or ultrafilter membrane, and macropore simultaneously Jing nets are (such as
Plastic wire, wire netting etc.) or nonwoven cloth material, can be used as the supporter of Dynamic Membrane.
Typically, the backing material for being sintered by plastics, ceramics, metal etc. is referred to as porous material, stainless (steel) wire, nylon
The backing material such as net, polythene net and industrial filter cloth, non-woven fabrics is referred to as large aperture net.Porous material is with large aperture net to dynamic
Film is played a supporting role, so the referred to as supporter of Dynamic Membrane.
It can be seen that, supporting surface of the prior art is that soft silk screen, non-woven fabrics etc. are constituted, and the inside and outside differential pressure change of film is caused
Soft supporting body loosens so that builds bridge and loosens, affects water quality.
The content of the invention
The technical problem to be solved in the present invention is soft supporting body because the inside and outside differential pressure change of film causes Dynamic Membrane to build bridge
Loosen, affect water quality.
In order to solve this technical problem, the invention provides, a kind of interior external pressure precoat formula dynamic membrane support body, if including
Dry annular wafer, some annular wafers are superimposed along Z-direction, and are fixed by rod member assembling, and two adjacent ring-types are thin
Gap is provided between piece.
Optionally, fillet surface is provided between the upper surface of the annular wafer and inside and outside side, the annular wafer
Lower fillet surface is provided between lower surface and inside and outside side.
Optionally, the described upper and lower fillet surface of correspondence position is interconnected.
Optionally, the described upper and lower fillet surface angle of inclination of correspondence position, size match.
Optionally, pad is provided between two adjacent annular wafers, is passed through between two adjacent annular wafers
The pad forms the gap.
Optionally, the end face of the annular wafer is provided with raised points, by described between two adjacent annular wafers
Raised points form the gap.
Optionally, the annular wafer is provided with installing hole, and the rod member passes through some installing holes along Z-direction,
So as to the assembling for realizing some annular wafers is fixed.
Present invention also offers a kind of dynamic membrane system, including the Dynamic Membrane that card, cylinder, end socket and the present invention are provided
Support body, the dynamic membrane support body are installed on the card by card hole, and the cylinder and end socket are individually fixed in described
The both sides of card, the cylinder enclose to form the first space with the card, and the end socket encloses to form second with the card
Space, the dynamic membrane support body are located at the inner side of the cylinder and end socket, and connect the second space and the first space.
Optionally, described dynamic membrane system also includes water tank, and the water tank is respectively communicated to the second space and the
One space.
Optionally, it is additionally provided with the card to described in the liquid guiding inflow and outflow by second space or the first space
The pod apertures of dynamic membrane support body.
Dynamic membrane support body supporting surface is changed to hard material by the present invention, enhances support effect, makes bridge formation be difficult to loosen,
Effluent quality is improved, meanwhile, the present invention also enhances backwash effect；Can serve as External Pressure Type supporter, it is also possible to as interior
Die mould supporter, principle are communicated, and can be changed as needed；Additionally, the annular wafer that the present invention is provided is formed by stacking, easily add
Work, cost are reduced, the quality assurance.
Description of the drawings
Fig. 1 is the schematic top plan view of annular wafer in one embodiment of the invention；
Fig. 2 is the side-glance shape principle schematic of annular wafer in one embodiment of the invention；
Fig. 3 is the side-glance shape principle schematic figure of annular wafer in one embodiment of the invention；
Fig. 4 is the arrangement principle schematic of dynamic membrane support body in one embodiment of the invention；
Fig. 5 is the schematic diagram of dynamic membrane support body in one embodiment of the invention；
Fig. 6 is the connection diagram of dynamic membrane support body and card in one embodiment of the invention；
Fig. 7 is the schematic diagram of dynamic membrane system in one embodiment of the invention；
Fig. 8 is the effect schematic diagram of dynamic membrane system in one embodiment of the invention；
Fig. 9 is the bridge formation schematic diagram of dynamic membrane system in one embodiment of the invention；
In figure, 1- dynamic membrane support bodies；10- annular wafers；The upper fillet surfaces of 11-；12- installing holes；13- raised points；On 14-
End face；Fillet surface under 15-；16- lower surfaces；17- medial surface；18- lateral surface；19- rod members；2- cards；21- cards hole；3- is sealed
Head；The first spaces of 31-；4- cylinders；41- second spaces；5- water tanks.
Specific embodiment
The interior external pressure precoating formula dynamic membrane support body present invention provided below with reference to Fig. 1 to Fig. 9 and dynamic membrane system
It is described in detail, which is optional embodiment of the present invention, it is believed that those skilled in the art are not changing essence of the invention
Which is modified and is polished in the range of god and content.
Please comprehensive reference Fig. 1 to Fig. 5, the invention provides a kind of interior external pressure precoating formula dynamic membrane support body 1, including some
Annular wafer 10, some annular wafers 10 are superimposed along Z-direction, and are fixed by the assembling of rod member 19, two adjacent rings
Gap is provided between shape thin slice 10.
In the embodiment that Fig. 2 and Fig. 3 illustrates, between the upper surface 14 of the annular wafer 10 and inside and outside side 17,18
Fillet surface 11 is provided with, between the lower surface 16 of the annular wafer 10 and inside and outside side 17,18, lower fillet surface 15 is provided with.Enter
For one step, in the embodiment that Fig. 2 illustrates, the described upper and lower fillet surface 11,15 of correspondence position is interconnected.What Fig. 3 illustrated
In embodiment, the described upper and lower fillet surface 11,15 of correspondence position is connected by inside and outside side 17,18.Optionally, correspondence position
Described upper and lower fillet surface 11 match with 15 angles of inclination, size.
The relevant gap, in not shown embodiment of the invention optional, adjacent two annular wafers it
Between be provided with pad, the gap is formed by the pad between two adjacent annular wafers.In the embodiment shown in Fig. 1
In, the end face of the annular wafer 10 is provided with raised points 13, can be that upper surface 14 can also be located at lower surface 16, adjacent
The gap is formed by the raised points 13 between two annular wafers 10.
In the embodiment that Fig. 1 and Fig. 5 illustrates, installing hole 12 on the annular wafer 10, is additionally provided with, the rod member 19 is along Z
Direction of principal axis passes through some installing holes 12, so as to the assembling for realizing some annular wafers 10 is fixed.The rod member 19 exists
The present invention is chosen as screw mandrel, and Z-direction can be defined as along the direction of 10 upper and lower end face of annular wafer.In other words, annular wafer
There is installing hole 12 on 10, annular wafer 10 is superimposed by assembling by screw mandrel.On annular wafer 10 and (or) lower plane is provided with projection
Point 13, during the superposition assembling of annular wafer 10, because there is these raised points 13, makes to produce certain gap between thin slice.Certainly
Raised points 13 can be not provided with, and fill in certain thickness pad between thin slice, so equally can be produced between thin slice
Certain gap.
Dynamic membrane support body supporting surface is changed to hard material by the present invention, enhances support effect, makes bridge formation be difficult to loosen,
Effluent quality is improved, meanwhile, the present invention also enhances backwash effect；Can serve as External Pressure Type supporter, it is also possible to as interior
Die mould supporter, principle are communicated, and can be changed as needed；Additionally, the annular wafer that the present invention is provided is formed by stacking, easily add
Work, cost are reduced, the quality assurance.
On the basis of above description, comprehensive reference Fig. 6 to Fig. 9 is asked, present invention also offers a kind of dynamic membrane system, bag
The dynamic membrane support body 1 that card 2, cylinder 4, end socket 3 and the present invention are provided is included, the dynamic membrane support body 1 passes through card hole 21
It is installed on the card 2, the cylinder 4 and end socket 3 are individually fixed in the both sides of the card 2, the cylinder 4 and the flower
Plate 2 encloses to form the first space 41, and the end socket 3 encloses to form second space 31 with the card 2, the dynamic membrane support body
1 inner side for being located at the cylinder 4 and end socket 3, and connect the second space 31 and the first space 41.
In the embodiment that Fig. 8 illustrates, described dynamic membrane system also includes water tank 5, and the water tank 5 is respectively communicated to institute
State second space 31 and the first space 41.Additionally, being additionally provided with the card 2 to by second space 31 or the first space 41
The pod apertures (not shown) of dynamic membrane support body described in liquid guiding inflow and outflow.
In other words, annular wafer 10 is superimposed the supporter for forming a column from level to level.Single or branched dynamic membrane support body 1
It is fixed on card 2, on card 2, has installing hole 21 and pod apertures (not shown), installing hole 21 is used for fixing dynamic membrane support body
1, pod apertures are used for the inside for allowing liquid to be capable of inflow/outflow dynamic membrane support body 1.Card 2 is fixed on into cylinder 4 and end socket 3
Between, form two regions：First space 41 and second space 31.Cylinder 4, end socket 3 and pipeline, valve, water pump, water tank 5 etc.
Connection, it is possible to constitute complete dynamic membrane system.
In prior art, a part of diameter is plugged in the aperture that bridge formation effect just refers to above filter medium less than medium
The little particle of filter opening diameter above, here it is arch formation, after arch formation there occurs, even diameter is straight less than duct
The granule in footpath can also be filtered.
Support below by way of the interior external pressure precoating formula Dynamic Membrane provided to the present invention to processes such as intrinsic pressure, external pressure, backwashes
The operation logic of body and dynamic membrane system is described in detail：
External pressure process：
Coalescents are poured in water tank 5, water pump is opened, water and coalescents enter cylinder 4 together, are then filled with whole
Cylinder 4, water are entered into inside supporter by the gap on dynamic membrane support body 1, and are flowed into envelope from the pipeline being internally formed
3, then by pipeline reflow tank 5.When water flows through dynamic membrane support body 1, a part passes through gap to coalescents in water,
Major part is dammed by gap, or itself forms bridge formation.Thereafter coalescents are built bridge stop, and are constantly increasing bridge formation
Thickness.Bridge formation is compacted, and water can be through the gap between coalescents and the coalescents granule hole of itself, to Dynamic Membrane
1 intermediate flow of support body.The bridge formation that float in water is formed by coalescents stops, it is impossible in dynamic membrane support body 1
Portion, the water in the middle part of dynamic membrane support body 1 are processed water, i.e. water purification.The first space 31, flower so in end socket 3
Connected region in the middle part of plate hole 21, dynamic membrane support body 1 can be referred to as clean water area；Second space 41 inside cylinder 4 and dynamic
The region formed outside film support 1 is referred to as raw water area.The bridge formation that coalescents are formed and dynamic membrane support body raw water area
Distinguish with water purification.
Intrinsic pressure process：
Coalescents are poured in water tank 5, water pump, the first space that water and coalescents are entered in end socket 3 together is opened
31, it is then filled with whole first space 31, and flows into the inside of dynamic membrane support body 1, water is by the seam on dynamic membrane support body 1
Gap is entered into outside supporter, full of the second space 41 in whole cylinder 4, then by pipeline reflow tank 5.Film forming in water
When water flows through dynamic membrane support body 1, a part passes through gap to auxiliary agent, and major part is dammed by gap, or itself forms bridge formation.
Thereafter coalescents are built bridge stop, and are constantly increasing the thickness of bridge formation.Bridge formation is compacted, and water can pass through coalescents
Between gap and the coalescents granule hole of itself, to 1 flows outside of dynamic membrane support body.Float in water is helped by film forming
Dosage form into bridge formation stop, it is impossible to into the outside of dynamic membrane support body 1, be to be located into the water outside dynamic membrane support body 1
The water managed, i.e. water purification.The connected region in the middle part of the first space, card hole 21, dynamic membrane support body 1 so inside end socket 3
Referred to as raw water area；The region formed outside second space and dynamic membrane support body 1 inside cylinder 4 is referred to as clean water area.
The bridge formation that coalescents are formed is distinguished with water purification with dynamic membrane support body raw water area.
It can be seen that, the angle formed by the chamfering of upper and lower two panels annular wafer is superimposed the folder to be formed to upper and lower two panels annular wafer
Seam is all descending (no matter inner pressed or external-compression type), because this angle is present, the coalescents of precoating are readily formed
" bridge formation effect ", forms Dynamic Membrane.By Dynamic Membrane outer layer auxiliary agent, float in raw water is stopped that water is by Dynamic Membrane coalescents
Space between the hole and coalescents of grain itself is drill-through.Intermembranous pressure reduction is increased, the bridge formation compacting that Dynamic Membrane auxiliary agent is formed, no
Easily loosen, it is ensured that effluent quality.The supporter of other materials such as stainless steel cloth, non-woven fabrics, is easily deformed after being under pressure,
The bridge formation local failure of auxiliary agent is made, causes auxiliary agent to leak, affect to produce the water quality of water.Thin slice adopts hard material, film forming to be pressed
Do not allow yielding after power, the bridge formation of auxiliary agent is survivable, and auxiliary agent will not be leaked, the water quality for producing water keeps stable.
Backwash process：
Current are superimposed the crack for being formed and are impacted toward angle from upper and lower two panels annular wafer 10, the bridge formation that coalescents are formed
Break up, crack is very thin, the outside impact that flushing water is just concentrated very much, the surge of every crack is big and uniform, can be drainage
Dosage form into filter cake from supporter wash open and break up, can effectively reduce the water yield and the time of backwash.In contrast, it is existing
The area of the supporter of other materials such as stainless steel cloth, non-woven fabrics in technology, raw water side and product water side is essentially identical, recoil
Wash water presses skewness, and being close to, water inlet is larger, and cake layer is easily rushed to open and breaks up, and backwashing water major part flows from here
Walk, away from square flushing water where water inlet pressure with regard to very little, cake layer is difficult to be washed out.Some positions are easily rushed
Fall, backwashing water pours off from these positions in a large number, and some positions are not easy to be flushed to, coalescents just adsorb always in net
On.
In sum, dynamic membrane support body supporting surface is changed to hard material by the present invention, is enhanced support effect, is made bridge formation
It is difficult to loosen, effluent quality is improved, meanwhile, the present invention also enhances backwash effect；External Pressure Type supporter is can serve as, also may be used
For use as interior die mould supporter, principle is communicated, and can be changed as needed；Additionally, the annular wafer that the present invention is provided is formed by stacking,
It is easily worked, cost is reduced, the quality assurance.
Claims (9)
1. a kind of interior external pressure precoats formula dynamic membrane support body, it is characterised in that：Including some annular wafers, some ring-types are thin
Piece is superimposed along same axis direction, and is fixed by rod member assembling, is provided with gap between two adjacent annular wafers；Dynamic Membrane
Support body supports face is hard material；Fillet surface, the ring is provided between the upper surface of the annular wafer and inside and outside side
Lower fillet surface is provided between the lower surface of shape thin slice and inside and outside side；The up and down angle formed by the chamfering of two panels annular wafer
It is all descending to be superimposed the crack to be formed to upper and lower two panels annular wafer.
2. interior external pressure as claimed in claim 1 precoats formula dynamic membrane support body, it is characterised in that：The described of correspondence position above falls
Edged surface, lower fillet surface are interconnected.
3. interior external pressure as claimed in claim 1 precoats formula dynamic membrane support body, it is characterised in that：The described of correspondence position above falls
Edged surface, lower fillet surface angle of inclination, size match.
4. interior external pressure as claimed in claim 1 precoats formula dynamic membrane support body, it is characterised in that：Two adjacent ring-types
Pad is provided between thin slice, and the gap is formed by the pad between two adjacent annular wafers.
5. interior external pressure as claimed in claim 1 precoats formula dynamic membrane support body, it is characterised in that：One end of the annular wafer
Face is provided with raised points, forms the gap by the raised points between two adjacent annular wafers.
6. interior external pressure as claimed in claim 1 precoats formula dynamic membrane support body, it is characterised in that：The annular wafer is provided with
Installing hole, the rod member pass through some installing holes along same axis direction, so as to realize the group of some annular wafers
Dress is fixed.
7. a kind of dynamic membrane system, it is characterised in that：Including card, cylinder, end socket and such as claim 1 to 6 one of arbitrarily institute
The dynamic membrane support body stated, the dynamic membrane support body are installed on the card by card hole, and the cylinder and end socket divide
The both sides of the card are not fixed on, the cylinder encloses to form the first space with the card, the end socket and the card
Enclose to form second space, the dynamic membrane support body is located at the inner side of the cylinder and end socket, and connects the second space
With the first space.
8. dynamic membrane system as claimed in claim 7, it is characterised in that：Also include water tank, the water tank is respectively communicated to institute
State second space and the first space.
9. dynamic membrane system as claimed in claim 7, it is characterised in that：Be additionally provided with the card to by second space or
The pod apertures of dynamic membrane support body described in the liquid guiding inflow and outflow in the first space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510354291.9A CN104923084B (en) | 2015-06-24 | 2015-06-24 | Internal-external pressure pre-coating type dynamic membrane support and dynamic membrane system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510354291.9A CN104923084B (en) | 2015-06-24 | 2015-06-24 | Internal-external pressure pre-coating type dynamic membrane support and dynamic membrane system |
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| CN104923084A CN104923084A (en) | 2015-09-23 |
| CN104923084B true CN104923084B (en) | 2017-03-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109574410A (en) * | 2019-01-03 | 2019-04-05 | 清华大学 | A kind of Sewage Biological Treatment dynamic membrane device and application method |
| CN111233252B (en) * | 2020-01-15 | 2021-08-13 | 北京建筑大学 | Zeolite-like imidazolate framework-horseradish peroxidase biomineralization embedded precoat and its preparation and application in ultrafiltration membrane water purification |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435907C (en) * | 2001-10-18 | 2008-11-26 | 株式会社荏原制作所 | Dynamic Filter Module |
| JP2004243319A (en) * | 2004-03-16 | 2004-09-02 | Sanyo Electric Co Ltd | Filtration system |
| CN201195700Y (en) * | 2008-04-08 | 2009-02-18 | 曹达文 | Dynamic state film supporting body for implementing water supply/wastewater treatment |
| CN101428905B (en) * | 2008-12-04 | 2010-11-10 | 山东大学 | Integral anaerobic dynamic membrane bioreactor and method of operation |
| JP2010214235A (en) * | 2009-03-13 | 2010-09-30 | Panasonic Electric Works Co Ltd | Filtration membrane, membrane module, and water treatment apparatus |
| CN102000512B (en) * | 2010-12-14 | 2013-11-06 | 上海鑫霖环境科技有限公司 | External pressing type loop-free solid-liquid separation dynamic membrane device |
| CN103785292B (en) * | 2012-10-29 | 2016-08-17 | 贺大立 | Dynamic particle membrane filter system |
| CN103041705B (en) * | 2012-12-29 | 2015-07-22 | 上海安赐机械设备有限公司 | Device and method for coupling catalyst recovery process with dynamic disc membrane separation process |
| CN204093163U (en) * | 2014-09-30 | 2015-01-14 | 北京克达思科技有限公司 | Filtration membrane cartridge |
| CN204746115U (en) * | 2015-06-24 | 2015-11-11 | 上海鑫霖环境科技有限公司 | Dynamic membrane supporter of interior external pressure formula of precoating and dynamic membrane system |
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