CN85103278B - Hollow-fiber filter module - Google Patents
Hollow-fiber filter module Download PDFInfo
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- CN85103278B CN85103278B CN85103278A CN85103278A CN85103278B CN 85103278 B CN85103278 B CN 85103278B CN 85103278 A CN85103278 A CN 85103278A CN 85103278 A CN85103278 A CN 85103278A CN 85103278 B CN85103278 B CN 85103278B
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Abstract
The present invention relates to a hollow fiber filter module which comprises an annular piece (a), a hollow fiber filter plate (b), a fixing piece (c) arranged on the inner surface of the annular piece and used for bundling and fixing hollow fibers into a U-shaped structure, a supporting piece (d) composed of a plurality of supporting columns or a column body, and a hollow fiber retainer (e) connected with the supporting piece, wherein both ends of each fiber are kept open by the fixing piece, the supporting piece is connected with the annular piece, and extends along the U-shaped part of the hollow fiber, and the hollow fiber retainer passes through a space surrounded by the U-shaped part of the hollow fiber. The module of the present invention is suitable for serving as a water purifier, and is used for processing water containing fine colloid particles, and the function can be restored by bubbling treatment.
Description
The present invention relates to the hollow-fiber filter assembly that water purifier is used, particularly relate to the hollow-fiber filter assembly of water purifier, be applicable to quite a large amount of water (for example supplying water) of handling metal ion and colloidal particle for nuclear power generation factory.
In the known water purifier that is used for except that iron rust in anhydrating and suspended substance, generally adopt a kind of ultra-fine filter.But such ultra-fine filter is easy to stop up.In addition, the particle size that can be removed by this class water purifier has certain limit, and can not remove metal ion.
For example, in the steam condensate that turbine reclaimed of the nuclear power generation factory that adopts boiling water reactor, contain the iron ion of 15PPb and the impurity of colloidal particle one class approximately.This kind condensation product directly is recycled in the boiling water reactor, and then aforementioned impurity will condense and be deposited on wherein, and reduce the efficient of generating.For this reason, before this phlegma directly is recycled to reactor, impurity concentration wherein should be purified to about 0.5PPb or lower.
When the impurity (promptly very thin colloidal particle and metal ion etc.) that is necessary to come as previously mentioned to remove efficiently in the steam condensate, can take to be fit to the water correction plant of a kind of reverse osmosis membrane of the sort of application of conventional water treatment.But the equipment of this use reverse osmosis membrane often requires very high pressure being used to filter purpose, thereby must be large-sized.Like this, this kind equipment is used as with regard to discomfort, and the filter assemblies handled of the steam condensate that nuclear power generation factory is reclaimed for example is because processing at this moment must be carried out in closed system.
On the other hand, though the hollow fiber multi-hole filtering film has the superior ability of purifying waste water, when being used for requiring to handle the big water gaging that contains considerable colloidal particle and metal ion etc., usually stop up.Recover its filtering function owing to being difficult to remove this blockage from film, they seldom use.In addition,, not only from capacity, also be conceived to the processing of economy, maintenance and water simultaneously, also still need develop practical filter assemblies from the prior art state reference of process nuclear power plant recirculated water.
One object of the present invention is to provide a kind of hollow-fiber filter assembly, to be used to purify a large amount of water that contains considerable metal ion and very thin colloidal particle.
Another object of the present invention is to provide a kind of hollow-fiber filter assembly, and it can allow that it is carried out backwash and handle, and does not need to unload this assembly from water correction plant, just can easily recover the filtering function of this filtering membrane that has stopped up.
According to hollow-fiber filter assembly provided by the invention, comprise (a) a kind of annular element, (b) filtering membrane of forming by a large amount of hollow fibers, (c) be connected to a mounting block on this annular element internal surface, be used for a collection of hollow fiber boundling and be fixed into the U-shaped structure, and the two ends that make fiber keep opening wide, (d) strut member of forming by an a collection of pillar or a cylinder, this strut member is connected on the above-mentioned annular element, and partly extend along the U-shaped of hollow fiber, (e) a kind of locking piece of hollow fiber, be connected on the above-mentioned strut member, and extend by the space that the hollow fiber U-shaped partly surrounds.
Above-mentioned the sort of hollow fiber locking piece preferably is equipped with a tubulose partition member, so that it is parallel with strut member.
Fig. 1 a and 1b are the synoptic diagram of an embodiment of hollow-fiber filter assembly of the present invention, and Fig. 1 a is skeleton view (hollow fiber is not shown), and Fig. 1 b is the sectional view of being got along the A-A line among Fig. 1 a;
Fig. 2 a and 2b are the synoptic diagram of similar Fig. 1 a and 1b, and another embodiment of hollow core fiber filter assembly of the present invention is described.
Comprise the part skeleton view that amplifies among several embodiment at the contiguous position of hollow fiber locking piece and tubulose partition member in Fig. 3 and Fig. 4 explanation hollow-fiber filter assembly of the present invention;
Fig. 5 to Fig. 8 remains the perspective illustration of explanation other several embodiment of hollow-fiber filter assembly of the present invention, (hollow fiber is not shown);
Fig. 9 is a graphic representation, shows when having adopted some kinds of hollow-fiber filter assemblies to filter the time dependent situation of viewed pressure reduction.
Contrast accompanying drawing below, for a more detailed description to hollow-fiber filter assembly of the present invention.
Fig. 1 a and 1b schematically illustrate an embodiment of hollow-fiber filter assembly of the present invention.As shown in these figures, hollow core fiber filter assembly of the present invention mainly comprises a kind of annular element 1, a kind of mounting block 2, boundling and is fixed into U-shaped structure of hollow fiber 3, a kind of strut member (or pillar) 4, and a kind of hollow fiber locking piece 5.
The synoptic diagram of Fig. 2 a and 2b illustrates another embodiment of hollow core fiber filter assembly of the present invention.In this embodiment, the center that centers on hollow fiber keeper 5 is connected with a kind of tubulose partition member 6, and its residing position is parallel with above-mentioned pillar.For this tubulose partition member 6, can adopt the tube-like piece of Any shape.Its cross section is not limited to circle, but can select ellipse, drift angle sphering for use Polygons or the like shape.In addition, tubulose partition member 6 also can make its thin end face connect annular element 1 with funnel shaped tubulose.Perhaps, this funnel shaped pipe fitting also can be placed on the contrary, promptly allows its a thicker end face connect annular element 1.
Fig. 3 and 4 is the part skeleton views that amplify, illustrate in the hollow-fiber filter assembly of the present invention included, several parts of hollow fiber locking piece 5 and tubulose partition member 6 adjacent regions.As shown in Figure 4, following such an embodiment is possible, and hollow fiber locking piece 5 wherein extends by tubulose partition member 6, and borrows it that the latter is fixed in this.The size of tubulose partition member 6 can not be made unified regulation, and this is because it should could suitably be determined according to the size of hollow-fiber filter assembly.But following regulation is desirable, and promptly the internal cross-sectional area of tubulose partition member 6 is not less than 1/50 of annular element 1 internal cross-sectional area.The length of tubulose partition member 6 will make that preferably its lower end is slightly outwards protruded from the bundle of lining up U-shaped structure of hollow fiber 3, and its upper end will allow bubble to be incorporated into the central interior part of 3 bunchys of hollow fiber.Opposite with hollow fiber locking piece 5, the tubulose partition member does not have the effect that hollow fiber 3 is held in the U-shaped structure.As aforesaid pillar 4, hollow fiber keeper 5 is also preferably got the ring structure of not being with sharp edge with tubulose partition member 6.
The number of packages of pillar 4 is not limited to two among Fig. 1 a and the 2a, but can be 3 or more.Include among the embodiment of tubulose partition member 6, hollow fiber locking piece 5 can be as lower bifurcation, and the bifurcated that makes it is according to 3 or a plurality ofly radially stretch out from tubular spacer.Fig. 5 has shown a kind of like this embodiment, and hollow fiber locking piece wherein has 4 bifurcateds to extend radially out along 4.
The bifurcated number of hollow fiber locking piece 5 can suitably determine according to the whole profile of hollow-fiber filter assembly and quantity of comprehensive size, its intensity and hollow fiber or the like.
In addition, hollow fiber locking piece 5 can comprise a kind of annular element shown in Fig. 6 and 7.When hollow fiber keeper 6 includes an annular element, be arranged in U-shaped structure of hollow fibrous bundle, just can distribute in the dispersive mode along this annular element.Like this, because the aperture between this kind hollow fiber, compare with the situation of the bar-shaped hollow fiber locking piece of the sort of employing class shown in 8 with Fig. 1 a, 5, enlarge, bubble just can supply to quantity and want much more hollow fiber, and these hollow fibers also can vibration effectively in the bubble processing process.In addition, because this cyclic hollow fiber locking piece has been determined the position of a hollow, thereby can play the similar effect of tubulose partition member, this does not just provide a kind of special requirement of tubulose partition member, thereby can simplify the structure of hollow-fiber filter assembly.
Constitute all parts (being annular element, strut member, hollow fiber locking piece and tubulose partition member) of hollow core fiber filter assembly of the present invention, the most handy can burning and the hydrocarbon resin that do not disengage obnoxious flavour are made.As the hollow fiber 3 of filtering membrane can be the hollow fiber that following various material is made, and these materials comprise, for example cellulose materials, polyolefins, polysulfones, polyvinyl alcohol and polymethylmethacrylate (being synthetic glass).But more satisfactory by the hollow fiber that the porousness polyolefin film is made, this is because they have superior weather resistance and good strainability.Especially it is desirable to by being applicable to that the film that filters out superfine colloidal particle makes hollow fiber, and can stand the external force that acts in the backwash operation.The backwash operation comprises the polyethylene hollow fiber as the example of this class hollow fiber of filtering function of the filter membrane that recovers to have stopped up usually, and there is commodity selling in Mitsubishi artificial silk company, and trade name is polyethylene hollow fiber EHF.
When hollow fiber module of the present invention was used to be necessary to handle a large amount of water that contains quite a lot of colloidal particle, filter membrane at this moment inevitably will stop up.But, in hollow-fiber filter assembly of the present invention, can carry out a kind of manipulation of regeneration of recovering its initial performance simply and effectively.Comprising following a few procedure in a kind of renovation process preferably: make current get with filtration operation in used side in the opposite direction, bottom from this hollow-fiber filter assembly blasts gas simultaneously, with bubble hit hollow fiber 3 wherein, make it to be subjected to mechanical vibration, shake off cohesion down thus and attached to hollow fiber 3 lip-deep colloidal particle and other impurity.If but allow common hollow-fiber filter assembly accept the regeneration operation that such bubbling is handled, then the liquid turbulent flow that takes place under the bubbling influence can make hollow fiber 3 tangle mutually, has weakened their filtering function.So serious situation can take place at extreme case.At this moment, above-mentioned entanglement phenomenon may make some hollow fiber 3 damage, and the effect of the filter membrane that can not recur.
But, because hollow-fiber filter component assembling of the present invention has the hollow fiber locking piece 5 that is connected to above the pillar 4, and it can be used for hollow fiber is locked into U-shaped, like this, the configuration of the U-shaped of hollow fiber 3 just can be in the regenerative process of bubbling processing, makes that disturbance is unlikely to reach unaccommodated degree.And, can also allow bubble quite equably by the inside of hollow fiber 3 formed bundles, make the regeneration operation that recovers hollow fiber 3 filtering functions to carry out effectively.Therefore, be connected to the hollow fiber locking piece 5 on the pillar 4, can also prevent that hollow fiber 3 influence owing to current in filtration procedure from swelling, and hollow fiber 3 is avoided because of tired too early the going bad of excessive bending, have again a bit, hollow-fiber filter assembly of the present invention includes the tubulose partition member, handle by bubbling when this assembly and to carry out above-mentioned regeneration operation, when recovering the filtering function of hollow fiber 3, this kind tubulose partition member 6 can allow bubble to arrive the inside center part of lining up the bundle that U-shaped structure of hollow fiber 3 become by it.This just can not only make the skin of the bundle of hollow fiber 3, and can make its inside be subjected to the collision of bubble, thereby manipulation of regeneration can more effectively be carried out faster.
Fig. 8 is the skeleton view of a signal, goes on to say another embodiment of hollow-fiber filter assembly of the present invention.Do not draw hollow fiber among the figure again.In this embodiment, strut member 4 is cylinders, and has the hollow fiber locking piece of tubulose partition member 6, then is connected to the lower inner surface of this cylinder support 4.This cylinder support 4 not only is used as the support of fixation hollow fiber locking piece 5, and can also make hollow fiber 3 store or avoid sustaining damage between the delivery period in manufacturing of hollow-fiber filter assembly and actual application.Should be realized that, though annular element 1 and cylinder support 4 are to constitute independently in the present embodiment, but they be can constitute one integrally-built.In addition, be provided with a perforate 7 near the position of annular elements 1, be used for preventing that the hollow-fiber filter assembly from borrowing bubbling to handle and carrying out bubble coalescence being arranged in component internal in the aforementioned regeneration operation process, make such bubble be discharged this assembly in cylinder support 4.The size of perforate 7 can be any, as long as it can allow the bubble of introducing cylinder support 4 be easy to discharge.But suitable condition is to make the resistance that flows through this perforate 7 in fact reach negligible degree.Like this, the size of perforate 7 preferably will be equal to or greater than the internal cross-sectional area of cylinder support 4.
In hollow-fiber filter assembly of the present invention, by the packing density of mounting block 2 boundlings and fixed hollow fiber 3 (more exactly, be the aperture that all hollow fiber 3(of being embedded in mounting block 2 comprise them) total cross-sectional area sf, with respect in the annular element 1 with hollow fiber 3 vertical in the ratio R of cross-sectional area sr) preferably should be able to satisfy following condition:
0.11≤R（＝sf/Sr）≤0.60
If the unsuitable height of packing density R of these hollow fibers, then be difficult to come this hollow-fiber filter assembly of body plan by following mode, promptly be difficult to material with mounting block and come all spaces between these hollow fibers of filling, thereby make mounting block unable to get up compartmentation.At this moment, get the upper limit of R value naturally.But in the sizable hollow-fiber filter assembly of size, packing density R even mounting block can normally play compartmentation, also usually was undesirable greater than 0.60 o'clock.Particularly special is, when make pending liquid from the outer side inflow of hollow fiber its when inboard, this kind liquid can not arrive the inside of hollow fiber bundle, and when this kind liquid from the outer side inflow of hollow fiber its when inboard, the liquid of the hollow fiber by fibrous bundle inside can not run off hollow fiber bundle.The result is positioned at reduction the effective rate of utilization of the hollow fiber of fibrous bundle inside.In addition, in aforesaid bubbling was handled, bubble became and is difficult to feed the inside of hollow fiber bundle, and only made that the hollow fiber that is positioned at the fibrous bundle outer surface region just might recover its filtering function again.This phenomenon is 10 square centimeters or bigger size hollow-fiber filter assembly for aforesaid internal cross-sectional area sr, and is remarkable especially.For this kind internal cross-sectional area sr is 30 square centimeters or bigger situation, and the value of R preferably is no more than 0.5.
On the other hand, when the value of R is very little, just can not produce the problems referred to above.But when the value of R is inappropriately little, promptly less than 0.11 o'clock, then the treatable water yield of each hollow-fiber filter module will reduce.So and need requirement inconsistent of compact assembly, make its practicality that reduction be arranged slightly.According to this result, the value of R is not less than 0.2, and preferably is not less than 0.3.
Like this, because hollow-fiber filter component assembling of the present invention has a kind of hollow fiber locking piece, the U-shaped configuration of this hollow fiber bundle just can not be interfered, and these hollow fibers just can be subjected to the collision of bubble quite equably.And in handle the whole regeneration operation process that this assembly recovers its filtering function with bubbling, be not always the case.Also have, during filtration treatment, this kind hollow fiber locking piece can prevent that hollow fiber from the protuberance phenomenon taking place under the influence of current, and can avoid fiber that excessive bending fatigue is arranged.This just makes hollow-fiber filter assembly of the present invention when being used for water purifier, shows excellent performance.
Be also pointed out that, if the structure of hollow-fiber filter assembly of the present invention, be when taking such form as mentioned above, when the hollow fiber packing density that promptly is embedded in annular element is not more than a prescribed value, then pending liquid, when it is that the outside from hollow fiber flows to the inboard, just can easily arrive the inside of hollow fiber bundle; And when flowing to the inboard in the outside that makes this liquid from hollow fiber, can allow by being positioned at the liquid of fibrous bundle boring fiber, flow out this hollow fiber bundle easily.Its result has improved the effective rate of utilization of hollow fiber on the whole.Another of hollow fiber bundle filter assemblies of the present invention is characterised in that, because bubble can feed the inside of hollow fiber bundle in the bubbling treating processes, like this, borrow bubbling to handle the regeneration operation of the strainability that recovers this filter membrane, just can rely on this bubbling method gently to carry out, and needn't unload this assembly from water correction plant.Therefore, whole hollow fiber bundle just can play the effect of filter membrane in long time, when this just makes hollow-fiber filter assembly of the present invention in being used as plant-scale water purifier, demonstrates superior performance.
The present invention is further described by following each example.
Example 1 is to example 6
65 millimeters of internal diameters, high 70 millimeters annular element are connected on two pillars, and 740 millimeters of Zhi Zhuchang are wide 20 millimeters, thick 5 millimeters.The hollow fiber locking piece that the fixing last diameter in the bottom of these pillars is 8 millimeters.Obtained shown in Fig. 1 a and the 1b cover support element of hollow-fiber filter assembly according to this.In this support element, it is 0.119 square millimeter that a branch of cross-sectional area that is configured to each root fiber of polyethylene hollow fiber EHF(of U-shaped structure is arranged), and make it top by the hollow fiber locking piece.Mounting block with a polyvinyl resin system makes up a hollow-fiber filter assembly then.Every hollow fiber begins to return the U-shaped partial-length of this mounting block from mounting block, on average is about 1400 millimeters.Change the used hollow fiber number shown in the table 1, assembled the hollow-fiber filter assembly that the hollow fiber packing density R that adds up to 6 does not wait.
Each such hollow-fiber filter assembly all has been used for purifying following water, and the concentration of wherein contained iron ion and tiny colloidal particle (about 8 microns of diameter) is about 10PPm.Purifying treatment has been carried out 15 continuously, and during this period, the handled water yield of hollow fiber per unit surface-area keeps constant basically.Handle with bubbling then and carried out above-mentioned manipulation of regeneration 1 hour.In this scavenging process, all hollow-fiber filter assemblies can both be purified to water such degree, and the concentration of iron ion and other impurity is reduced to less than 0.5ppb.But, as shown in table 1, pressure reduction is rule over time, changes according to used hollow-fiber filter assembly.The pressure reduction of each hollow-fiber filter assembly is curve over time, is given among Fig. 9.
Comparative example 1 is to comparative example 4
Adopt identical annular element in size and the example 1, assembled the hollow-fiber filter assembly that adds up to 4 according to the mode identical with example 1, but no longer be equipped with strut member and hollow fiber locking piece here, in these hollow-fiber filter assemblies, the packing density R of hollow fiber, as shown in table 1, change along with used hollow fiber number.When these hollow-fiber filter assemblies experimentized according to the mode in the example 1 of being same as, its pressure reduction is as shown in table 1 over time to be very little, this and to be equipped with the example 1 of hollow fiber locking piece suitable to the result in the example 6.But after handling through bubbling, some hollow fiber in each such filter assemblies will be crooked or becomes flat.When the assembly that each is such is gone test again, can observe the colloidal particle seepage.
Example 7 is to example 10
4 hollow-fiber filter assemblies have been assembled altogether according to the mode identical with example 1, but adopted the hollow fiber locking piece shown in similar Fig. 6, replace bar-shaped formula hollow fiber locking piece, in these hollow-fiber filter assemblies, the packing density R of hollow fiber, as shown in table 1, change with the difference of the number of used hollow fiber.These hollow-fiber filter assemblies are also tested according to the mode identical with example 1.The gained result also is given in the table 1.
Result to example 6 compares with example 1, and the testing data of these several examples shows that pressure reduction increment rate in time is very little, and the pressure reduction after the bubbling processing recovers very greatly.
Claims (6)
1, a kind of hollow-fiber filter assembly, comprise that boundling becomes a kind of U-shaped structure, the fixing and spacious logical a large amount of hollow fibers in its two ends by a mounting block, this module diagnostic is that it has (a) annular element, above-mentioned fixing piece is attached to this annular element internal surface, (b) by pillar or the strut member that cylinder constitutes, this strut member is connected on the annular element and partly extends along the U-shaped of hollow fiber, (C) be connected to hollow fiber locking piece on this strut member, it extends by the space that the hollow fiber U-shaped partly surrounds.
2, according to the hollow-fiber filter assembly of claim 1, be characterised in that cross section when above-mentioned annular element be in the vertical direction of hollow fiber on the time, the ratio R of the shared cross-sectional area sf of hollow fiber and annular element internal cross section part sr, satisfy following condition:
0.11≤R（＝sf/Sr）≤0.60
3,, be characterised in that described strut member comprises a cylinder that perforate is arranged at its sidewall according to the hollow-fiber filter assembly of claim 1.
4, according to the hollow-fiber filter assembly of claim 1 or 3, be characterised in that described hollow fiber locking piece is furnished with a tubulose partition member, its longitudinal axis is parallel with aforementioned strut member basically.
5,, be characterised in that described hollow fiber locking piece has an annular element according to the hollow-fiber filter assembly of claim 1 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85103278A CN85103278B (en) | 1985-04-29 | 1985-04-29 | Hollow-fiber filter module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85103278A CN85103278B (en) | 1985-04-29 | 1985-04-29 | Hollow-fiber filter module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85103278A CN85103278A (en) | 1986-12-24 |
| CN85103278B true CN85103278B (en) | 1988-05-11 |
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ID=4793074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85103278A Expired CN85103278B (en) | 1985-04-29 | 1985-04-29 | Hollow-fiber filter module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85103278B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208066152U (en) * | 2018-03-13 | 2018-11-09 | 上海麦驼科技发展有限公司 | A kind of U-shaped unit block of tubular filter film |
| CN111672162B (en) * | 2020-03-31 | 2022-05-31 | 中国人民解放军92228 部队 | Annular water-gas separation device and water-gas separator |
-
1985
- 1985-04-29 CN CN85103278A patent/CN85103278B/en not_active Expired
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| Publication number | Publication date |
|---|---|
| CN85103278A (en) | 1986-12-24 |
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