CN104548937A - Film filtering device and method - Google Patents
Film filtering device and method Download PDFInfo
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- CN104548937A CN104548937A CN201410593365.XA CN201410593365A CN104548937A CN 104548937 A CN104548937 A CN 104548937A CN 201410593365 A CN201410593365 A CN 201410593365A CN 104548937 A CN104548937 A CN 104548937A
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- filter
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- filter membrane
- membrane
- filtration device
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Abstract
The invention relates to a film filtering device for a laboratory, and discloses a film filtering device. The film filtering device comprises a sealed filter drum, a filter film and a liquid inlet, wherein the filter film is arranged on the filter drum; the liquid inlet is formed in the wall, close to or very close to the filter film, of the filter drum; an opening, in the inner side of the wall of the filter drum, of the liquid inlet is oriented to or roughly oriented to the filter film; and the closeness is the distance capable of enabling liquid flow which enters the filter drum from the liquid inlet washes the filter film between the opening in the inner side of the liquid inlet and the filter film. In addition, the invention further discloses a using method for achieving a relatively good washing effect by changing the liquid flow. The film filtering device has the advantages that the washing effect of the filter film in a sealed hollow cavity is achieved; the film filtering device is simple in structure and good in washing effect; and the filter film can be effectively and actually prevented from being blocked.
Description
Technical field
The present invention relates to use for laboratory membrane filtration device, in particular to a kind of membrane filtration device and method, realize realizing washing away filter membrane while feed liquor by the inlet arranging side direction, described method also may be used for the limit test of microbe of non-sterile product.
Background technology
Aseptic or the limit test of medicine adopts membrane-filter procedure usually, and Sterility Test means a kind of method whether other kinds of checking medicine, dressing, suture, sterilized equipment and being applicable to pharmacopoeial requirements sterility test are aseptic.Typically, sterility test carries out in clean level way flow air section, and its overall process should strictly observe sterile working, prevents microbial contamination.Way flow air zone and work top, must carry out cleanliness factor checking.The sterility test of biological products, should by " Products in China code " about the regulation of sterility test is handled.The aseptic performance of inspection product is confirmed by filtering rear cultivation filter membrane.But by the particulate of membrane filtration, in filter process, thin slice filter cake cannot be formed at filter membrane surface containing a small amount of naked eyes are invisible in Some Drugs, block filter membrane, make membrane-filter procedure inefficiency.In prior art, the situation running into filter membrane blocking needs to change filter membrane, needs the internal aseptic environment destroying filter membrane, and changes inconvenience, affect detection efficiency, inspection can be caused time serious to proceed.Be necessary that development is a kind of thus under the state that maintenance is aseptic, more newly blocked filter screen or filter can be realized, the device that particularly can filter membrane be kept constantly unimpeded real-time online.
Summary of the invention
The present invention is directed in prior art, lacking the shortcoming that real-time online ground solves the effective scheme of membrane filtration device filter membrane blockage problem, providing a kind of membrane filtration device, by arranging the inlet that is positioned at filter membrane side direction, realize washing away filter membrane in real time, keep the object that filter membrane is unimpeded.
For achieving the above object, the present invention can take following technical proposals:
A kind of membrane filtration device, comprises the filter cylinder of sealing, is installed on filter membrane on filter cylinder and inlet; Further, described membrane filtration device also for be undertaken ventilating or completely airtight filter by cup top arbitrarily, can be particularly useful for air filter.
Described inlet be arranged at close to or very close in the cartridge wall of filter membrane, described inlet be positioned at opening inside cartridge wall towards or roughly towards filter membrane, described close to referring to the distance having between the interior side opening of inlet and filter membrane and the liquid stream entering filter cylinder by inlet can be made to be enough to wash away filter membrane.
In embodiments of the invention, described filter membrane is positioned at one end of cylindrical filter sleeves, and described filter membrane is extended along the radial direction of filter cylinder.
In embodiments of the invention, the interior side opening of described inlet is towards the direction being parallel to the filter membrane extended along a specific plane.
In embodiments of the invention, described filter membrane is close in one end of the interior side opening of described inlet.
In embodiments of the invention, described filter cylinder also comprises the air intake away from filter membrane one end being arranged at filter cylinder.
In embodiments of the invention, the sectional area that described inlet comprises at least two is less than the sectional area of inlet, and the gross area of inlet is no more than the liquid separating port of the area of inlet.
In embodiments of the invention, described inlet is also provided with pressure adjustable or nonadjustable supercharging device.
In embodiments of the invention, described air intake place is provided with air filtering assembly.
In embodiments of the invention, the interior side opening of described inlet towards direction and there is the angle that is not more than 30 ° between filter membrane place plane or place plane roughly.
The using method of membrane filtration device, by adjustment by inlet enter the liquid stream of filter cylinder flow velocity, wash away angle and instantaneous delivery and change liquid stream to the scouring effect of filter membrane.
The present invention has following remarkable technique effect:
Can wash away filter membrane in real time, utilize the liquid flow of inlet to wash away filter membrane, successfully avoid the formation of filter cake, can filter membrane be kept in real time unobstructed, in addition, when washing away, the gnotobasis of cartridge interior can be kept.
Further, the impact for filter membrane is little, can effectively prevent filter membrane impaired.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of membrane filtration device.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
A kind of membrane filtration device, as shown in Figure 1, lower same, comprise the filter cylinder 100 of sealing, be installed on filter membrane 200 on filter cylinder 100 and inlet 300, membrane filtration device described in the present embodiment is particularly useful for that those are completely airtight or adopt the air filter of top air inlet except blow vent, and particularly those filter membranes are away from the filter of air inlet; Typically, filter membrane 200 is installed on one end of filter cylinder 100, be usually located at one end vertically downward of filter cylinder 100, the outside of filter membrane 200 is also provided with leakage fluid dram for getting rid of filtrate, and the inlet 300 described in the application is for being arranged at a through hole on filter cylinder 100 wall.
Further, described inlet 300 be arranged at close to or very close on filter cylinder 100 wall of filter membrane 200, described inlet 300 be positioned at opening inside filter cylinder 100 wall towards or roughly towards filter membrane 200, described close to referring to the distance having between the interior side opening of inlet 300 and filter membrane 200 and the liquid stream entering filter cylinder 100 by inlet 300 can be made to be enough to wash away filter membrane 200.In the present embodiment, in order to avoid in the process of filtering, those cannot form laminar filter cake by the particulate of filter membrane 200 on filter membrane 200 surface, blocking filter membrane 200, causing the problem that filter efficiency reduces, by inlet 300 being arranged at the side of filter membrane 200, utilizing the liquid stream flowed into by inlet 300 to realize cross-flow filtration, avoid particulate to form filter cake blocking filter membrane 200 on the surface of filter membrane 200 by the souring of feed liquor liquid stream, thus keep the filter effect of filter membrane 200.
In order to the scouring effect of inlet 300 liquid stream can be improved further, should keep close as much as possible between inlet 300 and filter membrane 200, as the optional scheme of one, described filter membrane 200 can be close in one end of side opening in described inlet 300.The flow velocity of of the liquid stream flowed into by inlet 300 itself is utilized to wash away.Here, the flow velocity of liquid stream can control, and still has certain space due to filter cylinder 100 inside, as the detention space of liquid, therefore, can improve the effect of washing away by the flow velocity of adjustment feed liquor liquid stream.
Further, under the state that feed liquor liquid stream is normal pressure, the bore of inlet 300 is arranged to the bore being less than or being slightly smaller than leakage fluid dram, keep discharge opeing unimpeded, because the liquid in filter cylinder 100 can be discharged by leakage fluid dram comparatively rapidly, can not cause delay, therefore, the liquid stream of inlet 300 directly can impact inner surface realization the washing away filter membrane 200 of filter membrane 200.Further, in the operation of reality, in order to liquid can be made as soon as possible by filter membrane 200, can to connect extra supercharging device at air intake 400, improve the speed of liquid by filter membrane 200.
Embodiment 2
Membrane filtration device as described in above-described embodiment 1, same use bore is less than or is slightly smaller than the inlet 300 of leakage fluid dram bore, but improve the flow velocity of inlet 300, in order to meet the unimpeded requirement of discharge opeing, can on the basis of embodiment 1, reduce the bore of inlet 300, utilize high flow rate to realize washing away filter membrane 200.
Embodiment 3
Membrane filtration device as described in above-described embodiment 2; the pressure of local filter membrane 200 can be caused excessive owing to improving flow velocity, affect the service life of filter membrane 200, thus; the bore of inlet 300 can be improved; keeping, on the basis that original inlet hydraulic is constant, improving the instantaneous delivery of the liquid stream by inlet 300, and relative embodiment 2; reduce the flow velocity of liquid stream; improve and impact the water yield, reduce the impulsive force to filter membrane 200, thus reach the effect of protection filter membrane.
Further, as the preferred scheme of one, when throughput when considering filter membrane 200 and filtering, can be improved the unit interval of filter membrane 200 by amount by the area increasing filter membrane 200, the bore arranging inlet 300 is that the 1-1.5 of the bore of leakage fluid dram is doubly for good.Improve instantaneous erosion quantity, improve the scouring effect to filter membrane 200, and reduce the local assault to filter membrane 200.
Embodiment 4
A kind of membrane filtration device, as described in above-described embodiment 1-3, its difference is, improves scouring effect by the contact area improving feed liquor liquid stream and filter membrane 200.In above-described embodiment 1-3, be limited to inlet bore, liquid stream can only contact the local of filter membrane 200, namely the part that liquid stream can only directly impact filter membrane 200 at it is just formed directly washes away, other parts of filter membrane 200 can only rely on the flowing of liquid stream to realize, therefore, the scouring effect for other parts of filter membrane 200 is not good, causes washing away non-uniform phenomenon.For this reason, in inlet 300, side opening arranges a liquid distributing device, makes the multiply liquid stream that can be formed dispersion by the liquid stream of this liquid distributing device, thus improves the scouring effect for filter membrane 200.
Further, as the optional scheme of one, this liquid distributing device can be jet rose, by multiple shunting realized liquid of portalling.
Embodiment 5
A kind of membrane filtration device, as described in above-described embodiment 4, its difference is, the apopore that the nozzle of liquid distributing device is arranged is changed to slit by multiple through hole.Although the jet rose in embodiment 4 can play the effect of the contact area on the surface of improving liquid stream and filter membrane 200, but find in the use procedure of reality, because every one in multiply liquid stream is also only show in point cantact with filter membrane 200, namely often one liquid stream all can only wash away the sub-fraction of the filter membrane 200 that it directly impacts, multiply liquid stream still cannot accomplish comprehensively washing away filter membrane 200 well, therefore, as the optional scheme of one, change jet rose into gap nozzle, discrete liquid stream is become continuous print dispersion liquid stream, the direct contact surface improved between liquid stream and filter membrane 200 amasss, improve scouring effect.
Further, in order to the instantaneous delivery of inlet 300 can be maintained by, as the optional prioritization scheme of one, can arrange multiple tracks slit on nozzle, be preferably three road slits, horizontal interval is arranged respectively, improve the flow of feed liquor further, improve the filter efficiency of filter membrane 200.
Further, the width of slit can suitably be widened, and not only ensures the instantaneous delivery of inlet 300, can reduce the impact of slit for liquid stream content to be filtered simultaneously.Alternatively, the area of slit can be set to the area of the inlet of 1/10-1/4, and the width of slit then should be wide as much as possible, and its two ends can extend to the both sides of inlet 300.
Embodiment 6
A kind of membrane filtration device, as as described in above-described embodiment 4,5, its difference is, a supercharging device is installed in the outside of inlet 300, this supercharging device can adopt existing any known supercharging equipment for liquid in pipeline, its objective is the flow velocity improved by the liquid stream of nozzle.The pressurized effect of supercharging device should ensure after having installed nozzle additional, and the liquid flowing speed of inlet 300 can close to the flow velocity of the inlet of original installation nozzle.Further limit scheme as one, the flow velocity after supercharging should not exceed 85% of original inlet flow velocity, prevents that the liquid flowing speed of jet expansion is excessive produces excessive pressure to filter membrane 200.
Further, as the optional scheme of another kind, the pressurized effect of this supercharging device should regulate, and changes boost pressure by trace, can realize the change of the jet direction to the current spraying inlet or nozzle.As the preferred scheme of one, the pressure adjusting scope of a supercharging device can be set, and the pressure adjusting scope cyclically changing supercharging device reaches the object making the liquid stream sprayed wash away filter membrane 200 more all sidedly.It is pointed out that the pressure adjusting technology of above-mentioned supercharging device itself is existing, pressure adjusting technology known in the field can be used to realize.Further, the supercharging device described in the present embodiment and pressure adjusting technology can be applied in all embodiments of the application.
Embodiment 7
A kind of membrane filtration device, as as described in above-described embodiment 5,6, its difference is, filter membrane 200 can be covered better in order to make the liquid stream of jet expansion and realize washing away more comprehensively filter membrane 200, the shape of slit is set to the shape extended along an arc curve, the position at the two ends of this arc curve is lower relative to the position in stage casing, behind the position determining arc curve two ends and stage casing, forms required arc curve by matching.Further, when arranging multiple tracks slit, the width of the slit of the top should be the widest, and the width of the slit below it then in turn successively decreases; Meanwhile, the bending radian of the slit of the top or curvature or average curvature should be maximum, and the crooked radian of the slit below it or curvature or average curvature should be successively decreased successively, form more uniform and more large-area washing away.
Embodiment 8
A kind of membrane filtration device, described in embodiment described above, its difference is, change further filter membrane 200 and inlet towards the angle in direction.Comparatively speaking, to the micropore of the particulate be blocked on filter membrane 200 by filter membrane 200 be got rid of for washing away of filter membrane 200, in order to improve scouring effect, and reducing the impact for filter membrane 200, needing to make liquid stream be injected on filter membrane 200 with the angle tilted.Thus, can adjust the interior side opening of filter membrane 200 or inlet 300 towards, make shape between the two at an angle, reach and make liquid stream contact the object of filter membrane 200 in the mode at an inclination angle set.
Further, when the bulky single of the filter cylinder 100 that membrane filtration device uses is less, the liquid stream penetrated by inlet 300 or nozzle can be regarded as rectilinear motion approx, under considering this kind of situation, choose inclination angle, namely the angle between the injection direction of liquid stream and filter membrane 200 place plane, be 5 °-10 ° for excellent, the most very much not should more than 30 °.
Embodiment 9
A kind of membrane filtration device, described in embodiment described above, its difference is,
Described filter membrane 200 is positioned at one end of cylindrical filter sleeves 100, and described filter membrane 200 is extended along the radial direction of filter cylinder 100.
The interior side opening of described inlet 300 is towards the direction being parallel to the filter membrane 200 extended along a specific plane.
Described filter cylinder 100 also comprises the air intake 400 away from filter membrane 200 one end being arranged at filter cylinder 100, this air intake 400 place is provided with air filtering assembly, for filtered air, prevents the pollution of outside air.
Embodiment 10
Membrane filtration device as described in above-described embodiment, its difference is, on the basis of the membrane filtration device described in above-described embodiment, the flows per unit time comprising an inlet 300 is greater than the inlet 300 of the unit interval throughput of filter membrane 200, and the interior side opening of inlet 300 towards direction extend along the direction of deflection filter cylinder 100 sidewall.
In the present embodiment, because liquid inlet volume is greater than the throughput of filter membrane 200, need interval feed liquor, to wait for that liquid flows through filter membrane 200, in addition, the liquid that the liquid stream sprayed by inlet 300 promotes filter membrane 200 top layer forms a whirlpool rotated around filter membrane 200, realizes washing away filter membrane 200.Mode of washing away described in the present embodiment is for indirectly to wash away, the thin slice filter cake that no doubt more efficiently can be separated and be attached on filter membrane 200 is directly washed away in previous embodiment, but the impact of directly washing away for filter membrane 200 is larger, easy damage filter membrane 200, therefore utilizes turbulent flow indirectly the washing away filter membrane 200 forming vortex.
Embodiment 11
The method that membrane filtration device described in above-described embodiment 1-10 uses, in order to the membrane filtration device described in above-described embodiment can be used better, by adjustment by inlet 300 enter the liquid stream of filter cylinder 100 flow velocity, wash away angle and instantaneous delivery and change liquid stream to the scouring effect of filter membrane 200.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (10)
1. a membrane filtration device, is characterized in that, comprises the filter cylinder (100) of sealing, is installed on filter membrane (200) on filter cylinder (100) and inlet (300);
Described inlet (300) be arranged at close to or very close on filter cylinder (100) wall of filter membrane (200), described inlet (300) be positioned at opening inside filter cylinder (100) wall towards or roughly towards filter membrane (200), described close to referring to the distance having between the interior side opening of inlet (300) and filter membrane (200) and the liquid stream entering filter cylinder (100) by inlet (300) can be made to be enough to wash away filter membrane (200).
2. membrane filtration device according to claim 1, it is characterized in that, described filter membrane (200) is positioned at one end of cylindrical filter sleeves (100), and described filter membrane (200) is extended along the radial direction of filter cylinder (100).
3. membrane filtration device according to claim 1, is characterized in that, the interior side opening of described inlet (300) is towards the direction being parallel to the filter membrane (200) extended along a specific plane.
4. membrane filtration device according to claim 1, is characterized in that, described filter membrane (200) is close in one end of the interior side opening of described inlet (300).
5. membrane filtration device according to claim 1, is characterized in that, described filter cylinder (100) also comprises the air intake (400) away from filter membrane (200) one end being arranged at filter cylinder (100).
6. membrane filtration device according to claim 1, it is characterized in that, the sectional area that described inlet (300) comprises at least two is less than the sectional area of inlet (300), and the gross area of inlet (300) is no more than the liquid separating port of the area of inlet.
7. membrane filtration device according to claim 1, is characterized in that, described inlet (300) is also provided with pressure adjustable or nonadjustable supercharging device.
8. membrane filtration device according to claim 5, is characterized in that, described air intake (400) place is provided with air filtering assembly.
9. membrane filtration device according to claim 1, is characterized in that, the interior side opening of described inlet towards direction and there is the angle that is not more than 30 ° between filter membrane (200) place plane or place plane roughly.
10. the using method of a membrane filtration device, it is characterized in that, by adjustment by inlet (300) enter the liquid stream of filter cylinder (100) flow velocity, wash away angle and instantaneous delivery and change liquid stream to the scouring effect of filter membrane (200).
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| CN201410593365.XA CN104548937B (en) | 2014-10-29 | 2014-10-29 | Membrane filtration device and method |
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| CN201410593365.XA CN104548937B (en) | 2014-10-29 | 2014-10-29 | Membrane filtration device and method |
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| CN104548937B CN104548937B (en) | 2017-08-15 |
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Cited By (5)
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| CN104925910A (en) * | 2015-07-01 | 2015-09-23 | 珠海格力电器股份有限公司 | Nozzle for purifying water and water purifier |
| CN105971064A (en) * | 2016-06-15 | 2016-09-28 | 张舒维 | Intelligent air water generator with high water purification efficiency |
| CN109513354A (en) * | 2018-03-16 | 2019-03-26 | 杨用武 | Filtration syringe and method |
| CN112028294A (en) * | 2019-07-18 | 2020-12-04 | 南京中鹏环保科技发展有限公司 | A normal position pollutant removal equipment for river course |
| CN114917759A (en) * | 2022-06-14 | 2022-08-19 | 常州纺织服装职业技术学院 | Ultrafiltration purifier |
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| CN104925910A (en) * | 2015-07-01 | 2015-09-23 | 珠海格力电器股份有限公司 | Nozzle for purifying water and water purifier |
| CN105971064A (en) * | 2016-06-15 | 2016-09-28 | 张舒维 | Intelligent air water generator with high water purification efficiency |
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