CN206996306U - The filter of filtering film component and its composition - Google Patents
The filter of filtering film component and its composition Download PDFInfo
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- CN206996306U CN206996306U CN201720629898.8U CN201720629898U CN206996306U CN 206996306 U CN206996306 U CN 206996306U CN 201720629898 U CN201720629898 U CN 201720629898U CN 206996306 U CN206996306 U CN 206996306U
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Abstract
The utility model discloses a kind of filtering film component, including membrane component, including membrane component, the membrane component is the hollow structure for the side opening being made up of porous metal film, in addition to is covered in the turbulent flow grid structure outside membrane component.In addition a kind of filter being made up of above-mentioned filtering film component is also disclosed.Porous metal film possess with lower filtration resistance, bigger filtration flux under the equal filtering accuracy of other films；Liquid can produce strong whirlpool when flowing through turbulent flow grid structure, can form continuous and effective to film surface and wash away, peel off the pollutant for being attached to film surface.Meanwhile porous metal film can produce vibration under the disturbance of filtered fluid, the thickness of pollutant attachment can be reduced, possesses self-cleaning function, thus substantially improves the filter effect of filtering film component, reduce the filtering cost of filter.
Description
Technical field
It the utility model is related to liquid filtration art, and in particular to the filtering of a kind of filtering film component and its composition
Device.
Background technology
Filtering film component of the prior art is mostly plate armature or tubular structure, filtering film component of the prior art
Due to the limitation of self structure, exist when in use operating pressure is big, yields poorly, needs fluid passage greatly, wash away flow
Greatly, the power consumption of pump is higher, and thus causing filtering film component, filter effect is undesirable in use, the filter being made up of it
Filter effect it is also bad.
Utility model content
The utility model main purpose is to provide a kind of filtering film component, to solve filtering film component mistake in the prior art
Filter the undesirable technical problem of effect.
The utility model filtering film component, including membrane component, including membrane component, the membrane component are by porous metal film structure
Into a side opening hollow structure, in addition to be covered in the turbulent flow grid structure outside membrane component.Porous metal film possesses
With lower filtration resistance, bigger filtration flux under the equal filtering accuracy of other films；Liquid passes through the film in the utility model
During element, due to the special mesh-structured design of turbulent flow grid structure, strong turbulent flow can be produced when liquid flows through turbulent flow grid
Whirlpool, continuous and effective can be formed to film surface and washed away, peel off the pollutant for being attached to film surface.Meanwhile porous metal film can
Vibration is produced under the disturbance of filtered fluid, the thickness of pollutant attachment can be reduced, possess self-cleaning function.Thus, it is possible to reach
Preferable filter effect.The opening direction of the mesh of turbulent flow grid structure is vertical with membrane component surface liquid flow direction.
Further, it includes at least two membrane components, and the membrane component is hollow platy structure, adjacent membrane component
Entirety is linked as by turbulent flow grid structure.The runner of hollow platy structure is smaller, flow area reduce, it is necessary to wash away flow
It is corresponding to reduce.Accordingly, it is capable to be run under lower film surface eroding velocity, the flow output of pump is reduced, effect reduces operating cost.Phase
Turbulent flow grid structure is set between adjacent membrane component so that when liquid is by hollow platy structure in the utility model, due to film
The particular design of turbulent flow grid structure between element so that the flow area between membrane component is reduced, and liquid washes away flow and entered
One step is reduced.
Further, the front and rear two sides of the hollow platy structure be porous metals diaphragm, one side be opening, opposite side
Face and top and bottom are sealing surface.So that liquid can only enter membrane component simultaneously by the porous metals diaphragm on front and rear two sides
Filtering, the liquid after filtering flow out from one side, which thereby enhance liquid filter efficiency.
Further, the turbulent flow grid structure includes being arranged at the grid on the outside of porous metals diaphragm and is arranged at lattice
Net the sealing surface of both sides.Thus under the effect of the pressure, the liquid entered by grid one end between membrane component passes through porous gold
Entered directly into after category membrane filtration inside membrane component, the liquid for not passing through porous metal film is arranged from the turbulent flow grid structure other end
Go out, improve liquid filter efficiency.
Further, the grid is cellular grid.Grid can realize above-mentioned flow area under this structure design
Reduce, wash away flow reduction, peel off the pollutant for being attached to film surface, reduce the thickness of pollutant attachment, possess automatically cleaning work(
Can and other effects.
Further, the hollow platy inside configuration is provided with circulation grid structure.Thus, when filtering a period of time
Afterwards, it is necessary to carry out backwash to membrane component inside, the backwash liquor being passed through in backwash process also can be in the effect of circulation grid structure
Lower turbulization vortex passes through porous metal film from inside to outside, is capable of the intimal surface of continuous erosion hollow platy structure, realizes
Effective cleaning to hollow platy structure.The opening direction of the mesh of circulation grid structure and membrane component surface liquid flow direction
Vertically.
Further, the porous metal film is stood by solid solution alloy, the metal simple-substance of face-centred cubic structure or body-centered
The thin slice that the metal simple-substance of square structure is made up of the metal polyporous material of matrix phase.Above-mentioned porous metal film possess with other
The lower characteristic such as filtration resistance, bigger filtration flux under the equal filtering accuracy of film.
The utility model additionally provides a kind of filter, including shell, the filtering film component that is arranged in shell, described outer
The net liquid chamber that shell includes stoste chamber, is connected with stoste chamber, the stoste chamber are provided with stoste outflow, stoste outlet, the net liquid chamber
Exported provided with net liquid import, net liquid, the filtering film component is above-mentioned filtering film component, hollow hardened in the filtering film component
The side opening of structure one and the net liquid inlet communication, the net liquid chamber are additionally provided with backwash mouth.Filter in the utility model is upper
State under structure, liquid to be filtered first enters filter interior from stoste outflow, and liquid passes through the membrane filtration in the utility model
Component, porous metal film possess with lower filtration resistance, bigger filtration flux under the equal filtering accuracy of other films；Liquid
During by membrane component in the utility model, due to the special mesh-structured design of turbulent flow grid structure, liquid flows through turbulent flow lattice
Strong turbulent flow whirlpool can be produced during net, continuous and effective can be formed to film surface and washed away, peel off the pollution for being attached to film surface
Thing.Meanwhile porous metal film can produce vibration under the disturbance of filtered fluid, the thickness of pollutant attachment can be reduced, is possessed certainly
Cleaning function.Thus, it is possible to reach preferable filter effect, therefore the filter efficiency of filter in the utility model is improved, changed
It has been apt to the filter effect of filter.After filtering for a long time, the film surface of membrane component, which still has pollutant attachment, influences filtration flux,
Therefore need to carry out backwash.Backwash is that cleaning liquid passes through more from circulation grid structure by being pressed into cleaning liquid to clear liquid chamber
Mesoporous metal film, the pollutant of metallic film surface is peeled off.Cleaning solution body is passed through by backwash mouth to carry out membrane component inside
Backwash cleaning.
Further, the stoste chamber is set with net liquid chamber for tiled configuration, and the stoste outflow is arranged at stoste bottom of chamber,
The stoste outlet is arranged at stoste chamber top, and the net liquid import is located at stoste chamber and net liquid chamber junction, the net liquid outlet
Net liquid chamber top is arranged at, the backwash mouth is arranged at net liquid bottom of chamber.Said structure cause filter effect of the present utility model and
Cleaning performance is optimal.
Further, inlet baffle is provided with the stoste outflow, outlet damper is provided with the stoste outlet.Thus may be used
To avoid membrane module from directly being impacted, while it can also play a part of evenly distributing liquid.
It can be seen that the utility model filtering film component is when in use compared to existing filtering film component in equal filtering accuracy
Lower porous metal film possess with lower filtration resistance, bigger filtration flux under the equal filtering accuracy of other films；Liquid leads to
When crossing the membrane component in the utility model, due to the special mesh-structured design of turbulent flow grid structure, liquid flows through turbulent flow grid
When can produce strong turbulent flow whirlpool, continuous and effective can be formed to film surface and washed away, peeled off and be attached to the pollutant on film surface.
Meanwhile porous metal film can produce vibration under the disturbance of filtered fluid, the thickness of pollutant attachment can be reduced, possesses automatically cleaning
Function.Thus, it is possible to reach preferable filter effect.
The utility model is described further with reference to the accompanying drawings and detailed description.What the utility model added
Aspect and advantage will be set forth in part in the description, and partly will become apparent from the description below, or pass through this practicality
New practice is recognized.
Brief description of the drawings
Form a part of accompanying drawing of the present utility model to be used for aiding in understanding of the present utility model, provided in accompanying drawing
Content and its relevant explanation in the utility model can be used for explaining the utility model, but do not form to it is of the present utility model not
Work as restriction.In the accompanying drawings：
Fig. 1 is the front view of membrane component in the utility model.
Fig. 2 is along the schematic cross-section of line A-A in Fig. 1.
Fig. 3 is along the schematic cross-section of line B-B in Fig. 1.
Fig. 4 is the front view of filtering film component in the utility model.
Fig. 5 is along the schematic cross-section of line C-C in Fig. 4.
Fig. 6 is along the schematic cross-section of line D-D in Fig. 4.
Fig. 7 is the front view of the filtering film component with flange arrangement in the utility model.
Fig. 8 is the side view of the filtering film component with flange arrangement in the utility model.
Fig. 9 is the top view of the filtering film component with flange arrangement in the utility model.
Figure 10 is the structural representation of filter in the utility model.
Figure 11 is the mplifying structure schematic diagram of I in Figure 10.
Embodiment
Clear, complete explanation is carried out to the utility model below in conjunction with the accompanying drawings.Those of ordinary skill in the art based on
The utility model can be realized in the case of these explanations.It is before being illustrated with reference to accompanying drawing to the utility model, it is necessary to special
It is not pointed out that：
(1) technical scheme in the utility model provided in each several part including the description below and technology are special
Sign, in the case where not conflicting, these technical schemes and technical characteristic can be mutually combined.
(2) embodiment of the present utility model being related in the description below is generally only the implementation of the branch of the utility model one
Example, rather than whole embodiments.Therefore, do not had based on the embodiment in the utility model, those of ordinary skill in the art
The every other embodiment obtained on the premise of making creative work, it should all belong to the scope of the utility model protection.
(3) on the explanation to term in the utility model.Specification and claims of the present utility model and relevant
Part in term " first ", " second " etc. be easily to cause the object confused for distinguishing, without specific for describing
Order or precedence.In addition, term " comprising " and " having " and their any deformation, it is intended that covering is non-exclusive
Include.Term " filtering accuracy " refers to the filter efficiency counted with micron particles.Term " membrane flux " refers to UF membrane mistake
One important process operational factor of journey, refer in the unit interval by the Fluid Volume on per membrane area.Term " effective pore
Thicknesses of layers " refers to the film layer for determining separation accuracy.Porous metal film is broadly divided into matrix and effective film layer, matrix aperture
Very big, effective film layer aperture is small to decide separation accuracy.Term " film surface slipstream " refers to flow along membrane component surface tangent direction
Dynamic liquid.
Filtering film component, including membrane component, the membrane component are the hollow knot for the side opening being made up of porous metal film
Structure, in addition to it is covered in the turbulent flow grid structure outside membrane component.
It includes at least two membrane components, and the membrane component is hollow platy structure, and adjacent membrane component passes through turbulent flow
Grid structure is linked as entirety.
The front and rear two sides of the hollow platy structure is porous metals diaphragm 11, one side be opening, another side and
Top and bottom are sealing surface 12.
The turbulent flow grid structure includes being arranged at the grid in the outside of porous metals diaphragm 11 and is arranged at grid both sides
Sealing surface 21.
The grid is cellular grid.
The hollow platy inside configuration is provided with circulation grid structure.
The porous metal film is by the gold of solid solution alloy, the metal simple-substance of face-centred cubic structure or body-centered cubic structure
The thin slice that category simple substance is made up of the metal polyporous material of matrix phase.
Filter, including shell, the filtering film component that is arranged in shell, the shell include stoste chamber 31 and stoste
The connected net liquid chamber 32 of chamber 31, the stoste chamber 31 are provided with stoste outflow 311, stoste outlet 312, and the net liquid chamber 32 is provided with net
Liquid import 321, net liquid outlet 322, the filtering film component is above-mentioned filtering film component, the hollow knot of the filtering film component
The side opening of structure one connects with the net liquid import 321, and the net liquid chamber 32 is additionally provided with backwash mouth 323.
The stoste chamber 31 is set with net liquid chamber 32 for tiled configuration, and the stoste outflow 311 is arranged at the bottom of stoste chamber 31,
The stoste outlet 312 is arranged at stoste chamber 31 and pushed up, and the net liquid import 321 is located at stoste chamber 31 and the junction of net liquid chamber 32,
The net liquid outlet 322 is arranged at net liquid chamber 32 and pushed up, and the backwash mouth 323 is arranged at the bottom of net liquid chamber 32.
Inlet baffle 3110 is provided with the stoste outflow 311, outlet damper 3120 is provided with the stoste outlet 312.
Membrane component number in filtering film component in present embodiment is two, and actual quantity can be according to use
Depending on the specific filtration needs of person.Membrane component in present embodiment in filtering film component is board-like membrane component, can also
It is core structure according to actual use Demand Design.
Fig. 1 is the front view of membrane component in the utility model.Fig. 2 is along the schematic cross-section of line A-A in Fig. 1.Fig. 3 is figure
Along the schematic cross-section of line B-B in 1.As Figure 1-3, membrane component is square platy structure, and the membrane module includes parallel set
The front and rear two panels porous metals diaphragm put, the top and bottom of the front and rear two panels porous metals diaphragm and one side are sealing surface
12, the sealing surface 12 can be the sealing glue surface for being used to connect two panels porous metals diaphragm of filling, or welding two
The solder side that the upper and lower side of piece porous metals diaphragm and its side are formed, the membrane module other side is openning shape.Described two
The first grid 13 is provided between piece porous metals diaphragm, first grid 13 is cellular grid, and cellular grid can be selected
The grid that stainless steel material or aluminum material are formed is selected, the first grid 13 viscose glue can be enclosed by periphery one or Type of Welding is set
Between two panels porous metals diaphragm.
Fig. 4 is the front view of filtering film component in the utility model.Fig. 5 is along the schematic cross-section of line C-C in Fig. 4.Fig. 6
For the schematic cross-section in Fig. 4 along line D-D.As Figure 4-Figure 6, filtering film component is integrally square platy structure, filtration module
Part includes at least two above-mentioned membrane components, is be arranged in parallel between membrane component, and the second grid 22, institute are provided between adjacent membrane component
It is also cellular grid to state the second grid 22, and cellular grid can select the grid that stainless steel material or aluminum material are formed,
Second grid 22 can be enclosed by periphery one viscose glue or Type of Welding be arranged at two neighboring membrane component porous metals diaphragm it
Between.The left and right sides of second grid 22 is provided with sealing surface 21, and the sealing surface 21 can be the adjacent for connecting of filling
The sealing glue surface of the porous metals diaphragm of membrane component, or the both sides for welding the porous metals diaphragm of adjacent membrane component are formed
Solder side, the both sides up and down of second grid 22 are open side.
Fig. 7 is the front view of the filtering film component with flange arrangement in the utility model.Fig. 8 is band in the utility model
There is the side view of the filtering film component of flange arrangement.Fig. 9 is that the filtering film component with flange arrangement is bowed in the utility model
View.As Figure 7-9, the filtering film component of flange arrangement is carried in the utility model, flange arrangement is used for filtering film component
Installation, the port of the opening side of the filtering film component is welded with first flange 41 for one week, set in the first flange 41
There are several flange holes 410, increase on the outside porous metals diaphragm of first membrane component and tail the membrane component of filtering film component
The second grid 22 is equipped with, the membrane pollution problem thus, it is possible to further reduce over filter membrane component, 22 liang of the second grid herein
Side is also required to set sealing surface 21.
Figure 10 is the structural representation of filter in the utility model.Figure 11 is the mplifying structure schematic diagram of I in Figure 10.Such as
Shown in Figure 10-11, filter includes shell, the filtering film component being arranged in shell in the utility model, and shell includes stoste
Chamber 31, net liquid chamber 32, the stoste chamber 31 are set with net liquid chamber 32 for tiled configuration, and the stoste chamber 31 is provided with stoste outflow
311st, stoste outlet 312, the net liquid chamber 32 are provided with net liquid import 321, net liquid outlet 322, and the filtering film component is above-mentioned
Filtering film component, hollow harden structure side opening connects with the net liquid import 321 in the filtering film component, the net liquid
Chamber 32 is additionally provided with backwash mouth 323.The stoste outflow 311 is arranged at the bottom of stoste chamber 31, and the stoste outlet 312 is arranged at stoste
Chamber 31 pushes up, and the net liquid import 321 is located at stoste chamber 31 and the junction of net liquid chamber 32, and the net liquid outlet 322 is arranged at net liquid
Chamber 32 pushes up, and the backwash mouth 323 is arranged at the bottom of net liquid chamber 32.The port one of side is connected on the net liquid chamber 32 with stoste chamber 31
Week is connected with second flange 43, connects port one week and the phase of the 3rd flange 43 of side on the stoste chamber 31 with net liquid chamber 32
Even, connected only between the stoste chamber 31, filtering film component, net liquid chamber 32 by flange.Be provided with the stoste outflow 311 into
Mouthful baffle plate 3110, outlet damper 3120 is provided with the stoste outlet 312.The volume of present embodiment Central Plains sap cavity 31 is big
In the volume of net liquid chamber 32, stoste chamber 31 is a canned body, and net liquid chamber 32 is tubular body.
As in Figure 10 arrow be oriented to liquid flow direction, the utility model filter in normal operation, first close backwash mouth
323, when being filtered to liquid, liquid to be filtered first enters stoste chamber 31 at stoste outflow 311, liquid when flowing into by
To the buffering of inlet baffle 3110, liquid to be filtered enters filtering film component region afterwards, and liquid to be filtered is first under pressure
First flow into the second grid 22, strong vortex is produced in the second grid 22 and forms turbulent flow, passes through porous metals respectively afterwards
Diaphragm 11 enters membrane component after filtering and is internally formed clear liquid, i.e. net liquid.Gained clear liquid is entered by net liquid import 321 afterwards
Net liquid chamber 32, the clear liquid in the net liquid chamber 32 are discharged behind net liquid outlet 322.After present invention work a period of time, membrane element
Part surface, which still has pollutant attachment, influences filtration flux, it is necessary to carry out backwash.Backwash is to be pressed into cleaning solution by backwash mouth 323
Body, cleaning liquid pass through porous metal film from the first grid 13 of circulation, the pollutant on porous metal film surface are peeled off.
Porous metal film described in present embodiment be by solid solution alloy, face-centred cubic structure metal simple-substance or
The thin slice that the metal simple-substance of body-centered cubic structure is made up of the metal polyporous material of matrix phase, it is particularly possible to select Al systems metal
Between compound-material form porous metal film, it possess acid and alkali-resistance, resistance to oxidation, it is resistance to vulcanization etc. performance.The porous metal film
Thickness be 5~1500 μm, average pore size be 0.05~100 μm, porosity be 15~70%.Porous metal film is unsymmetrical knot
Structure, effective pore thicknesses of layers can be 100 μm, and filtering accuracy is up to 0.1 μm.It is according to Kinkendal Effect pore-forming, pore-forming light
Sliding, tortuosity is small, therefore above-mentioned porous metal film possesses in the filtration resistance lower with the equal filtering accuracy of other films, more
The characteristics such as big filtration flux.
The grid 14 of first grid 13 and second is porous network structure, the first grid 13 and the second grid 14
On mesh opening direction it is vertical with membrane component surface liquid flow direction, i.e., it is vertical with film surface slipstream direction, specifically
For liquid flow direction include cleaning solution enter membrane component direction and stoste enter stoste chamber direction.First lattice
The aperture of mesh is 8-25mm, wall thickness 3-8mm in net 13 and second grid 14.
The present invention implements several groups of experiments, and first group using 5 μm of thickness, 0.05 μm of average pore size, porosity 15%
Porous metal film, use aperture as the first grid 13 and the second grid 14 that 8mm, wall thickness are 3mm；Second group use thickness for
200 μm, 20 μm of average pore size, the porous metal film that porosity is 35%, use aperture as the first lattice that 15mm, wall thickness are 5mm
The grid 14 of net 13 and second；3rd group use thickness for 1500 μm, 100 μm of average pore size, porosity be 70% porous metals
Film, aperture is used as the first grid 13 and the second grid 14 that 25mm, wall thickness are 8mm.
The applicant is drawn by above-mentioned contrast experiment, in the prior art using the flat filtering of ceramics or metal material
Membrane module and tubular filter membrane module, its operationally, operating pressure typically only has 50-200L/ in 0.1-0.6MPa, membrane flux
m2Kgfh, and need 3-5m/s film surface slipstream to wash away, just it is avoided that film transition is polluted, its membrane filtration is ineffective,
Consume energy larger, production cost is higher.And the present invention is at work, with respect to other inoranic membranes, membrane flux is up to 500-2000L/
(m2Kgfh), operating pressure ＜ 0.1Mpa, the eroding velocity ＜ 3m/s of film surface slipstream, it is only necessary to which 0.01-0.05MPa is pressed
Backwash under power state, it is quick to peel off the pollutant for being attached to film surface, the thickness of pollutant attachment can be reduced, possesses automatically cleaning work(
Energy.Can quick-recovery membrane flux soon, thus, it is possible to reach preferable filter effect, improve production efficiency.
In addition, compressed gas supply arrangement can be connected in the stoste chamber 31 of filter, can be periodically to filtered fluid
In be filled with about 0.05MPa compressed air, such as be passed through within every ten minutes 20s, 0.05MPa compressed airs.Compressed air is in fluid
Middle formation bubble, these bubbles can rupture after turbulent flow network is entered, and produce strong rush during rupture to film surface
Hit so that pollutant departs from porous metal film, reaches the purpose of cleaning membrane component.
Claims (10)
1. filtering film component, it is characterised in that including membrane component, the membrane component is the side opening being made up of porous metal film
Hollow structure, in addition to be covered in the turbulent flow grid structure outside membrane component.
2. filtering film component as claimed in claim 1, it is characterised in that it includes at least two membrane components, the film
Element is hollow platy structure, and adjacent membrane component is linked as entirety by turbulent flow grid structure.
3. filtering film component as claimed in claim 2, it is characterised in that the front and rear two sides of the hollow platy structure is porous
Metallic membrane (11), one side are that opening, another side and top and bottom are sealing surface (12).
4. filtering film component as claimed in claim 3, it is characterised in that the turbulent flow grid structure includes being arranged at porous gold
Belong to the grid on the outside of diaphragm (11) and be arranged at the sealing surface (21) of grid both sides.
5. filtering film component as claimed in claim 4, it is characterised in that the grid is cellular grid.
6. filtering film component as claimed in claim 1, it is characterised in that the hollow platy inside configuration is provided with circulation grid
Structure.
7. filtering film component as claimed in claim 1, it is characterised in that the porous metal film is by solid solution alloy, face
The metal simple-substance of heart cubic structure or the metal simple-substance of body-centered cubic structure are made up of thin the metal polyporous material of matrix phase
Piece.
8. filter, including shell, the filtering film component that is arranged in shell, the shell include stoste chamber (31) and stoste
The connected net liquid chamber (32) of chamber (31), the stoste chamber (31) are provided with stoste outflow (311), stoste outlet (312), the net liquid
Chamber (32) is provided with net liquid import (321), net liquid outlet (322), it is characterised in that the filtering film component is claim 1-7
In filtering film component described in any one claim, the side opening of hollow structure one and the net liquid of the filtering film component
Import (321) connects, and the net liquid chamber (32) is additionally provided with backwash mouth (323).
9. filter as claimed in claim 8, it is characterised in that the stoste chamber (31) and net liquid chamber (32) are tiled configuration
Setting, the stoste outflow (311) is arranged at stoste chamber (31) bottom, and the stoste outlet (312) is arranged at stoste chamber (31) top,
The net liquid import (321) is located at stoste chamber (31) and net liquid chamber (32) junction, and the net liquid outlet (322) is arranged at net liquid
Chamber (32) pushes up, and the backwash mouth (323) is arranged at net liquid chamber (32) bottom.
10. filter as claimed in claim 8, it is characterised in that stoste outflow (311) place is provided with inlet baffle
(3110), stoste outlet (312) place is provided with outlet damper (3120).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720629898.8U CN206996306U (en) | 2017-06-01 | 2017-06-01 | The filter of filtering film component and its composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720629898.8U CN206996306U (en) | 2017-06-01 | 2017-06-01 | The filter of filtering film component and its composition |
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| CN206996306U true CN206996306U (en) | 2018-02-13 |
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ID=61445997
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107413198A (en) * | 2017-06-01 | 2017-12-01 | 成都易态科技有限公司 | The filter of filtering film component and its composition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107413198A (en) * | 2017-06-01 | 2017-12-01 | 成都易态科技有限公司 | The filter of filtering film component and its composition |
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