CN1781585A - Inorganic support for filtering a fluid medium with optimized geometrical features - Google Patents
Inorganic support for filtering a fluid medium with optimized geometrical features Download PDFInfo
- Publication number
- CN1781585A CN1781585A CN200410082066.6A CN200410082066A CN1781585A CN 1781585 A CN1781585 A CN 1781585A CN 200410082066 A CN200410082066 A CN 200410082066A CN 1781585 A CN1781585 A CN 1781585A
- Authority
- CN
- China
- Prior art keywords
- passage
- section
- carrier
- porous carrier
- cross
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 16
- 238000001914 filtration Methods 0.000 title abstract description 28
- 239000000047 product Substances 0.000 claims abstract description 9
- 239000000706 filtrate Substances 0.000 claims abstract description 3
- 238000005452 bending Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 239000003351 stiffener Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002307 Dextran Polymers 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/10—Supported membranes; Membrane supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Filtering Materials (AREA)
Abstract
The invention concerns a porous support for an inorganic element for separating a fluid to recover a filtrate, the porous support being in the form of an elongated rigid element in volume and section, having a longitudinal central axis, at least two channels having each specific hydraulic diameter and port area, and provided in the support parallel to its central axis, the channels having together a filtering surface designed to be coated with at least a separating layer for the fluid medium. The invention is characterized in that the product of the hydraulic diameter by the filtering surface divided by the volume of the support is not less than 2000, and for a support whereof the ration of the filtering surface over the volume is not less than 340, the ratio of the sum of the port areas of the channels over the cross-section of the support, by the hydraulic diameter is not less than 8 m<SUP>2</SUP>/m<SUP>2</SUP>.mm.
Description
Technical field
Technical field of the present invention is to utilize the tangential separation of the resolution element that is commonly called film, resolution element is made by inorganic material, and comprise porous carrier, be formed for a series of circulation passages (circulation channel) of fluid media (medium) in the porous carrier at least one separating layer deposition surface thereon, its character is suitable for separating molecule or the particle that is included in the processed fluid media (medium) with form.
Background technology
Purpose of the present invention more precisely is the manufacture method of this class porous carrier.
The objective of the invention is to be used in nanofiltration, ultrafiltration, micro-filtration, filtration and counter-infiltration field with useful especially purposes.
Traditionally, diffusion barrier or resolution element are defined as: the combination of the porous carrier of being made by inorganic material such as pottery and one or more separating layers of being made by the lip-deep inorganic material that is deposited on each circulation passage, separating layer is connected to each other and is connected on this carrier by sintering.Because the mechanical strength of carrier, the effect of this carrier are to make the thin separating layer of manufacturing become possibility.
In the field of tubular film, the rigidity porous carrier presents the shape of the elongation with polygon or circular section.Porous carrier is arranged to comprise a series of parallel to each other and passages of being parallel to the longitudinal axis of porous carrier, and each passage is cylindrical.These passage one ends are communicated with the upstream chamber that has pending fluid media (medium), are communicated with between the other end and the downstream chamber.The surface of passage is covered by at least one separating layer, and this separation layer is present in passage according to molecule or the particle of assigned direction from the fluid media (medium) that a so-called intake channel end to another so-called exit passageway end circulates.This class film separates molecule or particle type in the pending product by sieve effect, and to be diameter intercepted greater than all particles or the molecule of membrane aperture condition.In separation process, when moving through separating layer, fluid takes place, and fluid diffuses into the permeability carrier towards the outer surface of porous carrier then.The processed fluid section that flows through behind separating layer and the porous carrier is called as ultrafiltrate, and the collecting chamber that is looped around around the film reclaims.
The Specifeca tion speeification of filtration supports is its filter table area, and described filter table area is equivalent to the inner surface of a passage and the product of number of active lanes.The characteristic that can show filtration supports efficient best is exactly the ratio of S/V, and this ratio shows the ratio of filter table area S and the volume V of carrier, because it is evident that then the discharge of filtration supports is also big especially if the filter table area of filtration supports is big.
Therefore, a method of raising S/V ratio is exactly the quantity that increases passage in the filtration supports.In order to increase the filter table area of filtration supports, for each channel selecting noncircular cross section (non-circular cross-section).
Yet the another one important performance characteristic of filtration supports is its mechanical strength.When filtering the surface area increase, the mechanical strength of filtration supports reduces.
Summary of the invention
Therefore, the objective of the invention is to determine the characteristic of porous carrier, when making it have high performance mechanical strength, make its filter table area optimization.
In order to achieve this end, in order to reclaim filtrate, the present invention relates to be used for the porous carrier of the inorganic resolution element of fluid media (medium), described porous carrier exists with the form of stiffener with elongation that given volume and cross section are arranged, has vertical central axis, at least two passages, wherein each passage has definite hydraulic diameter (hydraulic diameter) and passage section (throughcross-section), and be formed in the carrier to be parallel to its central shaft, these passages have the filter table area jointly, and the separating layer that it is designed to be used for by one deck at least fluid media (medium) covers.
According to the present invention:
-hydraulic diameter and filter table area divided by the product of carrier bulk more than or equal to 2000,
-for carrier, the ratio of its filter table area and volume is more than or equal to 340, and the summation of the passage section of the passage on the carrier cross section and the ratio of hydraulic diameter are more than or equal to 8 (m
2/ m
2Mm).
Therefore, the objective of the invention is to determine to comprise the porous carrier of maximum possible number of active lanes.Think that porous carrier has the volume V corresponding to its total cross section and its length product, and has a filter table area St, it is corresponding to the long-pending summation of all channel inner surfaces, if when perhaps all passages all have identical cross section, it equals the long-pending product with number of active lanes of single channel inner surface.So, observe, when the hydraulic diameter of passage reduced, if ratio St/V increases, the ratio of these two characteristics just can be used to define a numerical value, and it is high efficiency beginning filtration supports from it.So, observe, the product of hydraulic diameter that has only St/V ratio and passage is more than or equal to 2000, and it is effectively real that filtration supports just becomes.The sub-assembly (unit) that adopts is the sub-assembly that those skilled in the art use always, and in other words, St/V ratio is represented as m
2/ m
3, and the hydraulic diameter of passage is a millimeter.If passage is not that identical hydraulic diameter value is arranged all, the hydraulic diameter of the passage of employing is the average hydraulic diameter of described passage.
According to another characteristic of the present invention, be chosen as to optimize according to the mechanical strength of filtration supports of the present invention and select the number of channels that makes it to have maximum possible for use.Should consider that the notion of mechanical strength is relevant with the quality of filtration supports.For each filtration supports, the notion of transparency is used to describe the characteristic of the quality of filtration supports, and it is defined as the ratio of fluid passage total cross section and porous carrier total cross section.For example, be the filtration supports of 25mm for external diameter, comprise that 19 single diameters are the filtration channel of 3.5mm, transparency equals the cross section of the product of a channel cross-section and number of active lanes divided by the carrier that equals the 25mm diameter.Therefore, because it has represented the ratio of the surface area of carrier total cross section hollow, transparency is the character index of material in the filtration supports.This ratio of material surface area multiply by the volume of length corresponding to the filtration supports material, and obtains quality thus.Therefore, good transparency is equivalent to the low quality filtration supports, and low transparency is equivalent to high-quality (mass) filtration supports.Verified, if the transparency (the passage section summation that in other words is passage is than carrier cross section) and the ratio of hydraulic diameter are equal to or greater than 8mm
-1(m
2/ m
2Mm), the mechanical performance of filtration supports really becomes efficient.Notice that the ratio of this order of magnitude only has influence on for the ratio of those filter table area St and volume V more than or equal to 340 filtration supports.
According to the present invention, porous carrier comprises at least two passages, and wherein at least one is circular cross-section (circular section) when at least one passage is noncircular cross section.Obviously, porous carrier may comprise at least two passage, and each has noncircular cross section described passage.Equally, porous carrier can comprise the passage with center circular cross-section on the carrier center line, and around it, the passage with noncircular cross section distributes along one or more circumference.
Another object of the present invention is to optimize the shape of the passage that has noncircular cross section in the porous carrier for the performance of optimizing filter element.In other words, the performance of filter element also depends on the thickness that is deposited on the separating layer of channel surface from suspension or so-gel, control.
Therefore, according to a characteristic of the present invention, each passage with noncircular cross section comprises a plurality of radiuss of corner, and this crooked radius is always greater than 2mm.Because the radius of corner value is little, when emptying is used for preparing the sedimental suspension of separating layer or colloidal sol-gel, observe the formation of meniscus.For the wall radius of corner less than 2mm, the meniscus that forms when suspension or colloidal sol-gel mobile is minimum and do not form any defective.
According to another characteristic of the present invention, because each passage has noncircular cross section, the shape of porous carrier helps the thickness of controlled filter layer.Must consider that the passage with noncircular cross section comprises planar section and circular portion.As usual, if its bending radius, thinks then that the surface is the plane more than or equal to 20mm; Correspondingly, if its bending radius, thinks then that the surface is rounded less than 20mm.
Should consider that because these surfaces cause the maximum inhomogeneity of porous volume, circular portion should not preponderated in the shape of passage.On the contrary, the thickness of the porous carrier between the plane of two contiguous passages may be constant, and under these conditions, the porous volume can not change.Therefore, according to the present invention, the circular surface proportion should be less than or equal to 85% in the periphery of non-circular channels, and is preferably greater than 30%.Under these conditions, the deposit properties of filter course is even.Table 1 has clearly illustrated that the advantage of this characteristic.Table 1 display application is when the 300KD type layer, as the function of the percentage of the surface area of circle in the passage, the variation of the delay ratio (retention ratio) of quality that deposits in the filter course and Dextran 180 KD molecules.Therefore, when the more circle in surface, because big porous reservoir is relevant with each curved surface, the quality of deposition increases.Under the situation of complete circular surface (100%), it is very big that this quality becomes, so that the crack occurs.When the surface became more smooth, the thickness of deposits of filter course reduced at non-circular portion, and this has explained the reason that delay reduces with the long-pending percentage of circular surface.
Table 1
| The % circular surface is long-pending | 16 | 30 | 61 | 85 | 100 |
| Deposition quality (g/m 2) | 7 | 8.2 | 9.1 | 10.3 | 15 |
| Delay ratio % | 28 | 48 | 52 | 54 | 32 |
Owing to carrying out various variations and not away from scope of the present invention, so the present invention is not limited to the example that institute records and narrates and describes.
Claims (7)
1. porous carrier that is used for the separation of the fluid medium with the inorganic element that reclaims filtrate, this porous carrier is the have volume form of stiffener of elongation of (V) and cross section (S), has vertical central axis, at least two passages, each passage has definite hydraulic diameter and passage section (Si), and is formed in the carrier to be parallel to its central shaft, and passage has filter table area (St) jointly, the separating layer that it is designed to be used for by one deck at least fluid media (medium) covers, and it is characterized in that:
-hydraulic diameter and filter table area (St) divided by the product of the volume (V) of carrier more than or equal to 2000,
-for carrier, the ratio of its filter table area (St) and volume (V) is more than or equal to 340, and the summation of the passage section (Si) of the passage on carrier cross section (S) and the ratio of hydraulic diameter are more than or equal to 8m
2/ m
2Mm.
2. porous carrier according to claim 1 is characterized in that at least one passage has circular cross-section, and simultaneously, at least one passage has noncircular cross section.
3. porous carrier according to claim 1 is characterized in that at least two passages have noncircular cross section.
4. porous carrier according to claim 3 is characterized in that the passage with noncircular cross section has the center around the passage of the circular cross-section of carrier center line around being distributed in.
5. according to each described porous carrier of claim 2-4, it is characterized in that each passage with noncircular cross section comprises: at first, the radius of corner of bending radius is always greater than 2mm, and the second, bending radius is less than or equal to 85% less than surface proportion in the periphery of passage of 20mm.
6. porous carrier according to claim 5 is characterized in that each is had the passage of noncircular cross section, bending radius less than the surface of 20mm in the periphery of passage proportion greater than 30%.
7. inorganic resolution element is characterized in that it comprises each described porous carrier with passage that surface area covered by one deck separating layer at least according to claim 1-6.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR04/12735 | 2004-12-01 | ||
| FR0412735A FR2878452B1 (en) | 2004-12-01 | 2004-12-01 | INORGANIC FILTERING MEDIUM OF A FLUID MEDIUM WITH OPTIMIZED GEOMETRIC CHARACTERISTICS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1781585A true CN1781585A (en) | 2006-06-07 |
| CN1781585B CN1781585B (en) | 2010-09-29 |
Family
ID=34951755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200410082066.6A Active CN1781585B (en) | 2004-12-01 | 2004-12-15 | Inorganic support for filtering a fluid medium with optimized geometrical features |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1781585B (en) |
| FR (1) | FR2878452B1 (en) |
| HK (1) | HK1091159A1 (en) |
| WO (1) | WO2006059006A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009012706A1 (en) * | 2007-07-23 | 2009-01-29 | Guangzhen Meng | Internally-supported capillary filter membrane |
| CN107810046A (en) * | 2015-05-29 | 2018-03-16 | 高技术与膜工业公司 | For separating the single-piece rod structure of fluid media (medium) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2741821B1 (en) * | 1995-12-05 | 1998-02-20 | Tami Ind | INORGANIC FILTRATION TUBULAR ELEMENT HAVING INCREASED FILTRATION SURFACE AND MECHANICAL STRENGTH |
| FR2741822B1 (en) * | 1995-12-05 | 1998-02-20 | Tami Ind | INORGANIC FILTRATION TUBE ELEMENT HAVING NON-CIRCULAR SECTION CHANNELS HAVING OPTIMIZED PROFILES |
| DE19854319A1 (en) * | 1998-11-25 | 2000-05-31 | Hermsdorfer Inst Tech Keramik | Ceramic filter used as filter element comprises a cylindrical or multi-cornered prismatic outer surface, a central channel and surrounding retentate channels coated with a filter membrane |
-
2004
- 2004-12-01 FR FR0412735A patent/FR2878452B1/en active Active
- 2004-12-15 CN CN200410082066.6A patent/CN1781585B/en active Active
-
2005
- 2005-12-01 WO PCT/FR2005/002991 patent/WO2006059006A1/en active Application Filing
-
2006
- 2006-11-24 HK HK06112895.5A patent/HK1091159A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009012706A1 (en) * | 2007-07-23 | 2009-01-29 | Guangzhen Meng | Internally-supported capillary filter membrane |
| CN107810046A (en) * | 2015-05-29 | 2018-03-16 | 高技术与膜工业公司 | For separating the single-piece rod structure of fluid media (medium) |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006059006A1 (en) | 2006-06-08 |
| FR2878452A1 (en) | 2006-06-02 |
| CN1781585B (en) | 2010-09-29 |
| HK1091159A1 (en) | 2007-01-12 |
| FR2878452B1 (en) | 2007-03-02 |
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