CN104815557B - A kind of process units and its method of hollow fibre membrane component - Google Patents
A kind of process units and its method of hollow fibre membrane component Download PDFInfo
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- CN104815557B CN104815557B CN201510190999.5A CN201510190999A CN104815557B CN 104815557 B CN104815557 B CN 104815557B CN 201510190999 A CN201510190999 A CN 201510190999A CN 104815557 B CN104815557 B CN 104815557B
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Abstract
The present invention provides a kind of process units and its method of hollow fibre membrane component, process units includes prebake unit, positioning unit and the encapsulation unit set gradually along film silk direction of advance, the prebake unit is closed cell, and the positioning unit is connected with above-mentioned encapsulation unit；Also include control unit, the control unit is respectively connected with the prebake unit, the positioning unit and the encapsulation unit.The production method of the present invention is to be respectively completed the first drying to film silk, the film silk drying of encapsulation section and online film silk by prebake unit, positioning unit and encapsulation unit to burn casting, the direct automatic casting of film silk that can be by spinneret after rinsing is encapsulated, realize the technique for integration being realized to casting and crop from cloth silk, automated production process is realized, dependence of the technique to artifact is reduced；And the characteristics of the membrane component produced has marshalling, film silk volumetric ratio is high, quality is significantly improved.
Description
Technical field
The present invention relates to the production field of hollow fiber cartridge filter cell, and in particular to a kind of hollow fibre membrane component
Process units and its method.
Background technology
Membrane technology (particularly hollow-fibre membrane) as sewage recycling become it is most promising and it is with fastest developing speed speed
Water technology, either for the MBR films of sewage treatment plant, or has pressure type film for industry and water factory from birth, its year
Rank of the demand up to ten million square metre.
The method of manual intervention (making component by hand) being taken the production process of hollow fibre membrane component, required place is big more,
Fabrication cycle is long, and cost of labor is higher, due to there is manpower intervention, has that yield rate is low and product quality fluctuation is larger unavoidably
Defect, and during film casting glue, film silk is little with the volumetric ratio in glue, and film silk is also possible that wire broken rate is high, blocks
The problems such as rate height and up and down misalignment.
For the mode of manual intervention, the automated production also to membrane component at present is inquired into and has been attempted, but due to
The production of hollow-fibre membrane technique itself is complex, and film silk is more enervated in addition, holds the dynamics taken and is easily detected by automation
Operation is controlled, and which needs to take the glue of crosslinking during casting, needs longer hardening time to ensure film silk
There is no bubble seepage, nature will be carried out to film before casting and dry in the shade, the above-mentioned longer time of staying is realized by automating
Seem and be not easy to.
In order to ensure the economy of hollow fibre membrane component production process and practical sex chromosome mosaicism, following patent pin at present
Propose some solutions to subproblem, but still with defect urgently to be resolved hurrily, such as：
As can be seen that at present for the improvement of hollow fibre membrane component production alleviates problem on limited extent, such as
Take quiet glue to replace substantial amounts of centrifugal device, reduce equipment investment, by the cloth gluing equipment of part, cut the sides such as gluing equipment, mixed glue
Realize the biochemical process of part in face.But still generally existing is poor for applicability, puts into higher and use the defects such as inconvenience, there is no energy
The industrial problems of the element of automatic hollow membrane are solved fundamentally.
The content of the invention
In view of this, the present invention provides a kind of process units and its method of hollow fibre membrane component, it is intended to realize from spinning
The technique of the direct automated production hollow fibre membrane component of silk machine.
The technical solution used in the present invention is specially：
A kind of process units of hollow fibre membrane component, including the prebake unit set gradually along film silk direction of advance,
Positioning unit and encapsulation unit, the prebake unit are closed cell, and the positioning unit is connected with above-mentioned encapsulation unit；
Also include control unit, the control unit is respectively connected with the prebake unit, the positioning unit and the encapsulation unit
Connect.
In the process units of above-mentioned hollow fibre membrane component, the prebake unit include the first casing, guide roller set and
Air-dried mechanism, the guide roller set and the air-dried mechanism are respectively arranged in first casing, and film silk is wound in the guide roller set,
The air-dry machine is set up in the outside of the film silk, and not with film silk directly contact；The control unit is provided with the first temperature control
Unit, first temperature control unit are connected with the air-dried mechanism.
In the process units of above-mentioned hollow fibre membrane component, the air-dried mechanism adopts heat form for hot-air, micro-
Ripple or ultrared heater.
In the process units of above-mentioned hollow fibre membrane component, the positioning unit include the second casing, going barrel group and
Cloth silk mechanism, the going barrel group and the cloth silk mechanism are sequentially arranged in second casing along film silk direction of advance, described
Going barrel group is connected with second casing by central shaft；The cloth silk mechanism is provided with cloth silk pin, sets on the cloth silk pin
There is harness cord hole, harness cord hole described in the film silk Jing is wound in the going barrel group；The control unit is provided with the first electric motor units, institute
State the first electric motor units to be connected with the cloth silk mechanism, first electric motor units control the cloth silk mechanism along parallel to institute
State the direction movement of the central shaft of going barrel group.
In the process units of above-mentioned hollow fibre membrane component, the going barrel group includes the first side drum and the second side drum,
The first side drum and second side drum are arranged in juxtaposition in second casing；The bottom of the going barrel group passes through pedestal
Second casing is fixed on, at the top of the going barrel group, the first heating tape is provided with；The control unit is provided with the second motor list
Unit, second electric motor units and first side are roused, second side drum is respectively connected with, the second electric motor units control
The first side drum and second side drum are rotated about its center axis relatively independently；The control unit is additionally provided with second temperature control
Unit processed, the second temperature control unit are connected with first heating tape.
In the process units of above-mentioned hollow fibre membrane component, the encapsulation unit includes the 3rd casing and by described fixed
The going barrel group that bit location is proceeded to, the bottom of the going barrel group are by being fixed on the 3rd casing for glue groove, described
The second heating tape is provided with the top of going barrel group；Also include gluing portion and cut glue portion, the gluing portion located at the confession glue groove and
Between the going barrel group, the glue portion of cutting is located between second heating tape and the going barrel group；The control unit sets
There is operation control unit, the operation control unit controls the going barrel group and rotated to gluing portion, the second heating tape successively, cut
Glue portion and its in the corresponding gluing position in the gluing portion, the corresponding heating position in the second heating tape, cut the corresponding glue position of cutting in glue portion
State the time of staying.
A kind of production method of hollow fibre membrane component, comprises the following steps：
Pre-bake step：Air-dried mechanism carries out preliminary drying and processing to the film silk being wound in guide roller set, until film silk
Water content reaches 10～50%；
Positioning step：Film silk after preliminary drying enters positioning unit, by film silk positioning winding in going barrel group, and to which
Further dry；
Encapsulation step：Wrapping wire going barrel group after positioning proceeds to encapsulation unit, carries out gluing to film silk successively, heats, cuts
Glue, completes the encapsulation of single membrane component.
In the production method of above-mentioned hollow fibre membrane component, the positioning step is specially：
Stretch out the film silk of guide roller set and be wound in going barrel group through cloth silk pin, control unit on the one hand control cloth silk pin along with
The parallel direction movement of the central shaft of going barrel group and its translational speed, on the other hand the first side drum of control going barrel group and the
The independent rotation of two sides drum and its rotary speed so that film silk is equably wound in the surface of the first side drum and the second side drum；
The first heating tape at the top of going barrel group is dried to the film silk for being wrapped in the first side drum and the second side drum surface,
Until the water content of film silk reaches 5～10%；
In the production method of above-mentioned hollow fibre membrane component, the encapsulation step is specially：
It is wrapped in the first side drum or the film silk on surface is roused Jing after the heating of the first heating tape, as the operation of transfer roller turns in the second side
It is dynamic, (i.e.：Two sides drums are also independent rotation in the 3rd casing) rotated to the gluing portion of encapsulation unit first, in gluing portion
Corresponding gluing position carries out gluing to film silk；After the completion of gluing, the second heating tape is further rotated to, in the second heating tape correspondence
Heating position film silk is heated；Until after applying adhesive curing, being further rotated to and cutting glue portion, glue portion is corresponding to cut glue position cutting
Film silk being cut, gluing encapsulation part being formed in the end of membrane component, the encapsulation of single membrane component is completed.
In the production method of above-mentioned hollow fibre membrane component, glue portion is corresponding to cut glue position along gluing center line to film silk cutting
Cutting.
The beneficial effect comprise that：
The membrane component production technology of the present invention (is realized in three dimensions of three-dimensional length, width and height by the way of 3d printings
Drying to film silk, it is distributed, puts and a series of processes such as the gluing of glue head, the last cutting of solidification, shaping), can be according to need
Will, the difference immersion such as curtain, column type, square column type is gone out by control Programming or has the production of pressure type membrane component, realized
The integration manufacture of special-shaped membrane component, on the premise of membrane component production is directly realized, reduces in traditional processing technology
The intermediate links such as wire transporting, drying, cloth silk, sealing wire, casting, crop, the fixed production site needed for reducing, initial stage input cost
Significantly reduce；
The membrane component production technology of the present invention improves the utilization rate of film silk, and film silk does not take closure link, realizes
The isotactic of film silk is put, and realizes the production automation of membrane component, and eliminates the link of manpower intervention, in cost of labor section
The qualification rate of production efficiency and finished product is also improved while about.
The membrane component that the production technology of the Jing present invention is processed is a kind of being applied to for upgrading and transformation for realizing technology
Hollow-fibre membrane on current (family expenses) purified water machine.
Description of the drawings
When considered in conjunction with the accompanying drawings, the present invention can more completely be more fully understood.Accompanying drawing described herein is used for providing
A further understanding of the present invention, embodiment and its illustrates, for explaining the present invention, not constituting inappropriate limitation of the present invention.
Fig. 1 is a kind of schematic perspective view of the process units of hollow fibre membrane component of the invention；
Fig. 2 is a kind of schematic front view of the process units of hollow fibre membrane component of the invention；
Fig. 3 is a kind of schematic top plan view of the process units of hollow fibre membrane component of the invention；
Fig. 4 is a kind of winding in production curtain type membrane element process of the process units of hollow fibre membrane component of the invention
Encapsulation schematic diagram；
The curtain type membrane element schematic that Fig. 5 is produced for Fig. 4.
In figure：1st, prebake unit 11, the first casing 12, guide roller set 13, air-dry mechanism 2, positioning unit 21, the
Two casings 22, cloth silk pin 23, the first heating tape 24, the first side drum (left side) 25, second side drum (right side) 26, pedestal 3, encapsulation
Unit 31, the 3rd casing 32, the second heating tape 33, gluing portion 34, cut glue portion 35, for glue groove 4, film silk 41, first apply
Tree lace 42, second applies tree lace 43, line of cut 51, gluing encapsulation part.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to technical scheme.
The process units of a kind of hollow fibre membrane component as Figure 1-3, including the preliminary drying that continuous discharge is arranged successively
Dry unit 1, positioning unit 2 and encapsulation unit 3, membrane component production process be hollow fiber film thread 4 successively prebake unit 1,
Just drying, positioning winding are completed in positioning unit 2, encapsulation unit 3 and persistently drying, cutting film silk membrane component encapsulation three is completed
Procedure；Concrete production process is as follows：
Prebake unit 1 mainly includes the first casing 11, guide roller set 12 and air-dried mechanism 13, guide roller set 12 and air-dried mechanism
13 are respectively arranged in the first casing 11, and film silk 4 is wound in guide roller set 12, air-dry mechanism 13 be placed in film silk 4 bottom side and not with film
There is directly contact in silk 4, but film silk 4 is dried by providing thermal source.First casing 1 provides one to air-dry mechanism 13
The space of individual insulation, by guiding of the transfer roller of guide roller set 12 to film silk 4, air-dries mechanism 13 preferably using hot-air, microwave
Or the heater of the heat form such as infrared ray, realize and the first overall of film silk is dried.And can be passed through according to technological requirement
Control unit adjusts the parameters such as the time of the corresponding drying of heater, temperature.
Pre-bake step：Hollow fiber film thread 4 initially enters prebake unit 1, air-dries 12 pairs, mechanism and is wound in guide roller set
Film silk 4 on 12 carries out preliminary drying and processing, and after preliminary drying, film silk water content reaches 10～50%；
Film silk 4 after preliminary drying enters positioning unit 2, and positioning winding and further drying are carried out to which；
Positioning unit 2 is main including the second casing 21, by first (left side) side, 24, second (right side) of the drum side drum 25 being arranged in juxtaposition
The going barrel group of composition and the cloth silk mechanism for being provided with cloth silk pin 21；Going barrel group and cloth silk mechanism are set successively along film silk direction of advance
In the second casing 21；Wherein left side drum 24 and right-hand drum 25 can be rotated under Motor drive relatively independently, in going barrel
Group front portion is provided with cloth silk pin 25, and cloth silk pin 22 is provided with harness cord hole, can move left and right under Motor drive, left side drum 24 and the right side
Side drum 25 is fixed in the second casing 21 by the pedestal 26 of bottom, and portion is respectively equipped with the first heating tape 23 thereon.
Positioning step：Film silk 4 behind the harness cord hole on cloth silk pin 22 is moved at the drum 24 of left side, and is wrapped in left side
24 face of drum；Left side drum 24 rotates, and cloth silk pin 22 is moved left and right, while opening the first heating tape 23 at the top of which, is set by automatically controlled
Put rotating speed and translational speed so that film silk 4 is equably wrapped in the surface of left side drum 24, after being completely wound and drying, left side drum
24 enter the state waited into next procedure (packaging process)；Now film silk 4 is moved to right to right-hand drum 25, and is wrapped in the right side
25 surface of side drum；Right-hand drum 25 rotates, and cloth silk pin 22 is moved left and right, while first heating tape 23 at top is opened, by automatically controlled
Rotating speed and translational speed are set so that film silk 4 is equably wrapped in the surface of right-hand drum 24, is completely wound and dries, are being passed through
After first heating tape 23 is dried, after film silk water content reaches 5%～10%, right-hand drum 24 enters next procedure also into wait
The state of (packaging process).
Left side drum 24 (or right-hand drum 25) with film silk 4 encapsulation unit 3 is proceeded under the motor control of control unit,
Carry out the encapsulation of single membrane component；
Encapsulation unit 3 is main include proceeding to the going barrel group and the 3rd casing 31 of encapsulation unit 3, the second heating tape 32,
Gluing portion 33 and glue portion 34 is cut, by being fixed in the 3rd casing 31 for glue groove 35, gluing portion 32 is located at supplying glue groove for going barrel group
Between 35 and going barrel group, glue portion 34 is cut located at the second heating tape 32 and rotation located at the top of going barrel group in the second heating tape 32
Between rotary drum group.
Encapsulation step：The left side drum 24 (or right-hand drum 25) of encapsulation unit 3 is proceeded to as the operation of transfer roller is rotated, rotation
Start to carry out gluing to film silk, after the completion of gluing, left side drum 24 (or right-hand drum 25) is entered to 33 corresponding gluing position of gluing portion
One step rotates to 32 corresponding heating position of the second heating tape and starts to heat film silk, until applying the laggard step rotation of adhesive curing
To cutting, glue portion 34 is corresponding to cut glue position, and the wire cutting along gluing completes the encapsulation of single membrane component.
The invention belongs to the updating apparatus of the receive silk machine to spinning-drawing machine, film silk that can directly to spinneret after rinsing
Realize that automatic casting is encapsulated.Can complete the production of the different elements such as curtain type membrane, column type, square column type, and present invention production
The characteristics of film silk has marshalling, film silk volumetric ratio height and high film silk utilization rate, occupation of land is little, saved cost of labor, real
The automation mechanized operation of film silk production is showed.
With (such as：Film silk 4 to being wound on the drum 24 of left side is packaged) as a example by curtain membrane component, gluing and glue is cut as schemed
Shown in 4, it is rubber fabric to apply the part between tree lace (41,42), and the width phase of the width of rubber fabric and heating tape (23,32)
Deng preferably 5～10cm.As in the working position of 33 corresponding rubber fabric of gluing portion, line of cut 43 is then to cut glue portion 34
The corresponding working position for cutting glue position, that is, the wire cutting along gluing described in encapsulation step；The curtain membrane component of encapsulation enters one
Shown in step Fig. 5, the both sides termination of membrane component possesses gluing encapsulation part 51, and the gluing encapsulation part 51 of two terminations is corresponded to respectively
Be the first painting tree lace 41 in rubber fabric shown in Fig. 4 and the part of line of cut 43 and second apply tree lace 42 and line of cut
Part between 43.
In the present embodiment, going barrel group is cloth silk heating drum group, is by two cops (24,25), 1 cloth silk
Pin, 1 composition.As one kind preferably, the cylinder that cops is a diameter of 0.2-2m, length is 0.1-1m, heating tape (23,
32) it is then to protrude to be higher by 0.05-0.20m compared with wrapping wire shaft diameter above cylinder, arc length is the heating tape of 0.1-0.40m,
Heating tape can be metal or non-metallic material, and which is built-in with the mode of heatings such as electricity, infrared ray, ultrasound；2 cops are arranged side by side
Operate independently from, and its start and stop is automatically controlled by electromechanics；Additionally, by taking motor control, can cause on cloth silk pin 22
Harness cord hole according to the reciprocal motion of the degree of compiling and edit.
It is then a radian and heating tape radian identical cell body for glue groove, inside has glue spreading apparatus.Glue spreading apparatus with plus
The distance of tropical (23,32) can be adjusted, and the glue in glue spreading apparatus is then using the organic glue required for element production, such as ring
Oxygen glue, Polyurethane glue etc..
The effect for cutting glue portion 34 is exactly, by back and forth running in the middle of the position of gluing, to be carried out using machinery or hot mode
Cutting, wherein the concrete form of cutting mechanics can be mechanical bit, saw blade, laser, water knife etc..
By the setting of control unit so that the membrane component process units of the present invention is realized cloth silk pin, supplied by the program of setting
Glue groove, glue portion, the movement velocity of cops and direction are cut, and air-dry mechanism and heating tape, realize different elements by adjustment
Automatic control process.
Embodiments of the invention are explained above in association with accompanying drawing, accompanying drawing herein is for providing to this
That what is invented further understands.Obviously, the present invention preferably specific embodiment, but protection scope of the present invention be the foregoing is only
It is not limited thereto, any is can readily occurring in, of the invention essentially without departing to one skilled in the art
Change or replacement, are also all contained within protection scope of the present invention.
Claims (1)
1. a kind of production method of hollow fibre membrane component, using a kind of process units of hollow fibre membrane component, including along film
Silk direction of advance the prebake unit, positioning unit and the encapsulation unit that set gradually, the prebake unit is closed cell, institute
State positioning unit to be connected with above-mentioned encapsulation unit；
Also include control unit, the control unit is distinguished with the prebake unit, the positioning unit and the encapsulation unit
It is connected；
The prebake unit includes the first casing, guide roller set and air-dried mechanism, the guide roller set and air-dried mechanism's difference
In first casing, film silk is wound in the guide roller set, and the air-dry machine is set up in the outside of the film silk, and not with
Film silk directly contact；
The control unit is provided with the first temperature control unit, and first temperature control unit is connected with the air-dried mechanism；
The air-dried mechanism adopts heat form for hot-air, microwave or ultrared heater；
The positioning unit includes the second casing, going barrel group and cloth silk mechanism, the going barrel group and cloth silk mechanism edge
Film silk direction of advance is sequentially arranged in second casing, and the going barrel group is connected with second casing by central shaft
Connect；The cloth silk mechanism is provided with cloth silk pin, and the cloth silk pin is provided with harness cord hole, and harness cord hole described in film silk Jing is wound in the rotation
Rotary drum group；
The control unit is provided with the first electric motor units, and first electric motor units are connected with the cloth silk mechanism, and described first
Electric motor units control direction movement of the cloth silk mechanism along the central shaft parallel to the going barrel group；
The going barrel group includes that the first side drum and the second side drum, the first side drum and second side drum are arranged in juxtaposition in institute
State in the second casing；Second casing, the top of the going barrel group are fixed on by pedestal in the bottom of the going barrel group
It is provided with the first heating tape；
The control unit is provided with the second electric motor units, and second electric motor units and first side are roused, second side drum point
It is not connected, second electric motor units control the first side drum and second side is roused and revolved around central shaft relatively independently
Turn；
The control unit is additionally provided with second temperature control unit, and the second temperature control unit is connected with first heating tape
Connect；
The going barrel group that the encapsulation unit includes the 3rd casing and proceeded to by the positioning unit, the going barrel group
Bottom by being fixed on the 3rd casing for glue groove, be provided with the second heating tape at the top of the going barrel group；
Also include gluing portion and cut glue portion, the gluing portion is located between the confession glue groove and the going barrel group, described to cut glue
Portion is located between second heating tape and the going barrel group；
The control unit is provided with operation control unit, and the operation control unit controls the going barrel group and rotated to gluing successively
Portion, the second heating tape, cut glue portion and its in the corresponding gluing position in the gluing portion, the corresponding heating position in the second heating tape, cut glue
Portion is corresponding cut glue position state the time of staying；
It is characterized in that comprising the steps：
Pre-bake step：Air-dried mechanism carries out preliminary drying and processing to the film silk being wound in guide roller set, until film silk is aqueous
Amount reaches 10～50%；
Positioning step：Film silk after preliminary drying enters positioning unit, by film silk positioning winding in going barrel group, and enters one to which
Step drying；
Encapsulation step：Wrapping wire going barrel group after positioning proceeds to encapsulation unit, carries out gluing to film silk successively, heats, cuts glue, complete
Into the encapsulation of single membrane component；
The positioning step is specially：
Stretch out the film silk of guide roller set and be wound in going barrel group through cloth silk pin, control unit on the one hand control cloth silk pin along with rotation
The direction that the central shaft of drum group is parallel is moved and its translational speed, on the other hand the first side drum of control going barrel group and the second side
The independent rotation of drum and its rotary speed so that film silk is equably wrapped in the surface of the first side drum and the second side drum；
The first heating tape at the top of going barrel group is dried to the film silk for being wrapped in the first side drum and the second side drum surface, until
The water content of film silk reaches 5～10%；
The encapsulation step is specially：
It is wrapped in the first side drum or the film silk on surface is roused Jing after the heating of the first heating tape in the second side, is rotated to encapsulation unit first
Gluing portion, carries out gluing to film silk in the corresponding gluing position in gluing portion；After the completion of gluing, the second heating tape is further rotated to,
Film silk is heated in the corresponding heating position in the second heating tape；Until after applying adhesive curing, being further rotated to and cutting glue portion, cutting
Glue portion is cut to film silk corresponding glue position of cutting, and forms gluing encapsulation part, the encapsulation of single membrane component in the end of membrane component
Complete；
Film silk is cut along gluing center line the corresponding glue position of cutting in glue portion is cut.
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| CN106268359B (en) * | 2016-08-31 | 2019-05-21 | 天津碧水源膜材料有限公司 | A kind of RF film wire is at curtain equipment and preparation method |
| CN106823848B (en) * | 2017-03-28 | 2023-04-25 | 江西博鑫环保科技股份有限公司 | Automatic glue sealing device system for hollow flat ceramic membrane |
| CN107839242A (en) * | 2017-11-17 | 2018-03-27 | 鹤山市信必达新型环保材料科技有限公司 | A kind of adjustable wheel face heater |
| CN108786472B (en) * | 2018-04-04 | 2020-09-15 | 河南迈纳净化技术有限公司 | Packaging method of hollow fiber curtain type membrane assembly |
| CN110215843B (en) * | 2019-05-24 | 2021-06-22 | 东莞理工学院 | Automatic processing system and method for hollow fiber membrane module |
| CN111939763A (en) * | 2020-07-09 | 2020-11-17 | 中山德著智能科技有限公司 | Processing technology of hollow fiber membrane component |
| CN112265043A (en) * | 2020-11-09 | 2021-01-26 | 海南立昇净水科技实业有限公司 | Membrane silk winding equipment and membrane silk cutting device |
| CN113797764B (en) * | 2021-10-08 | 2024-01-05 | 江苏长海复合材料股份有限公司 | Production process of nylon skeleton hollow fiber membrane |
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| KR20090024393A (en) * | 2007-09-04 | 2009-03-09 | (주)필로스 | Preparation method of modified fluorine polymer membrane |
| CN103210136B (en) * | 2010-09-16 | 2016-04-06 | 三菱丽阳株式会社 | The manufacturing installation of the manufacture method of hollow fiber membrane tablet, the manufacture method of hollow fiber membrane module and hollow fiber membrane tablet |
| US9702623B2 (en) * | 2011-04-26 | 2017-07-11 | Mitsubishi Chemical Corporation | Drying device for hollow fiber membrane |
| CN203678266U (en) * | 2013-11-15 | 2014-07-02 | 北京碧水源膜科技有限公司 | Lining film spinning device with core liquid |
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