• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for the filtration of liquids, in particular raw water, process water, seawater and industrial and / or municipal waste water, wherein the liquid to be purified is introduced into a filter housing (110) via at least one inlet (111) under pressure and a solid fraction of liquid contained in the liquid is separated under pressure via at least one filter element (120, 120a, 120b) disposed in the filter housing (110), the ultrasound assisted pressure filtration and, optionally, disinfection of the liquid / permeate and / or concentrate.
    公开号:AT513225A2
    申请号:T50785/2013
    申请日:2013-11-29
    公开日:2014-02-15
    发明作者:Kurt Ing Gassner
    申请人:Kurt Ing Gassner；
    IPC主号:
    专利说明:

    1 16698
    The invention relates to a method for the filtration of liquids, especially drinking, service, process and salt water and wastewater from industry and / or communities, wherein the liquid to be purified is introduced via at least one inlet under pressure into a filter housing, one in the Liquid fraction contained solids fraction is separated via at least one arranged in the filter housing filter element under pressure and optionally subjected to additional disinfection, and a device for the filtration of liquids with a solids fraction and a filter element for this purpose.
    The currently available on the market gravity and pressure filtrations are designed primarily for the separation of solids from liquid and are designed for example as a drum, disk, band filter and / or filter cartridges, which are used in various designs as submerged and freestanding models. The filter cleaning is usually done via backwashing by means of air and / or Wasserbeaufschlagung. The currently known systems usually have a multi-stage structure in order to achieve desired microbiological effects at cutting powers of, for example, 20.0 μm to 0.1 μm. As a result, the costs for the acquisition and operation of these multi-stage systems are particularly high.
    It is therefore an object of the invention to provide a method and a device suitable for this purpose, which eliminates the above-mentioned disadvantages of the prior art.
    This object is achieved by a method of the type mentioned above in that the pressure filtration is carried out with ultrasound support. Thus, the filtration of liquids is assisted by the introduction of ultrasonic waves. This combination has the particular advantage that in the case of liquids which have a microbial load, for example seawater, blocking and / or fouling of the filter elements or membranes can be reduced or completely prevented.
    Basically, a distinction is made between reversible and irreversible blocking / fouling. Reversible filter pore blockages are steric pore blockages, the particle size being larger than the diameter 2/22 2 of the pore channels. In the irreversible processes, there is an internal adsorption, whereby filterable material settles in the pore aisles, so that it can lead to narrowing and eventually to the total pore laying. These particles are usually smaller, or larger particles are deformed under pressure so that they fit into the pore openings, but then wedge in the pore passages and settle (affinity effect). These substances can consist of inorganic (mineral) and organic substances that cause scaling and particle fouling on the filter surface.
    In addition, there are biofilm-forming substances that contribute to the growth of microorganisms on the filter surface by constantly transporting nutrients from the raw water - so-called biofouling. This leads to the formation of a gel-like biofilm layer, which in turn impairs the flow of water to the active filter surface. The problem of biofouling on filter surfaces is described, for example, in " Flemming, H.C .; Biofouling in Membrane Processes, Springer Verlag, Berlin 1995 " explained.
    Depending on the field of application of the method according to the invention, therefore, a microbiological effect may be desired by deactivating the microorganisms and / or disinfecting the supplied raw water, concentrate and / or permeate. Therefore, in a further embodiment of the invention, an additional disinfection by means of ultrasound is provided, wherein this can take place within the filter housing or outside of the filter housing in a separate from the filter housing disinfection reactor.
    This disinfection has the advantage, for example, compared to UV irradiation, that turbidity increase (NTU value) of the liquid to be filtered deactivation of microorganisms, bacteria, parasites and viruses by the ultrasonic irradiation continues to take place. This is due to the positive effect that a cavitation effect is created by the controlled introduction of ultrasonic waves in the raw water. Here, the resulting cavities (bubbles) contain in the liquid mainly liquid or
    Steam. Such cavities fall when they absorb no more energy, under the influence of external pressure together (so-called bubble implosion), with temperatures of 2,000-20,000 ° C and pressure peaks of several 1,000 bar in the immediate implosion arise, thereby 3/22 3 a microbiological effect on the cell membrane is brought about, which leads to the breaking of the cell walls and thus a destruction of the microorganism. Since the method according to the invention is also provided, inter alia, as a pre-purification in desalination plants (so-called RO plants), this microbiological deactivation effect prevents the formation of a constantly growing gel-like biofilm layer on the membrane surface of RO systems or other downstream cleaning systems, in particular in the Ultra Nano or hyper filtration. This, in turn, extends the use of the filter membranes in terms of hydraulic throughput, and significantly reduces the need for chemical cleaning as well as the increase in transmembrane pressure.
    It should be noted that the terms " liquid to be cleaned " and " raw water " used synonymously.
    By introducing ultrasound into the liquid to be cleaned, this or the solids fraction to be filtered off is exposed to targeted cavitation, so that sedimentation, in particular of particles with blocking potential on the active filter surface, is significantly reduced, or already existing deposits are dissolved. The filtration process according to the invention is operated here as a medium-pressure filtration with a maximum pressure of 6 bar.
    The advantage of the present embodiment of the invention is thus that disinfection of the permeate and the concentrate (retentate) due to the microbiological effect described above is achieved by the combined use of suitable ultrasound irradiation with a medium pressure filtration. The prerequisite for this combination of filtration and disinfection effect is a substantial solid particle-free liquid, which is achieved with this method and the device according to the invention in a preferably single-stage ultrasound-assisted system.
    It is preferably provided that the ultrasonic power input can be regulated. Thus, the entry of the ultrasonic waves can be adapted to the liquid to be filtered, in particular to the nature and properties of the solid fraction contained therein. In particular, 4/22 4 can be used to control the sound flow [m3 / s], the sound intensity [W / cm2], the acoustic characteristic impedance (ZF; [N * S / m3]) and the energy density [W / l].
    As a measure of the regulation of the ultrasound entry, in particular the transmembrane pressure difference of the filter elements (TMP; [mbar]) and / or the hydraulic flow rate measurement of the permeate (P; [l / s]) can be used, which preferably monitors continuously or discontinuously and particularly preferably automatically become. The definition of the filter area with regard to the hydraulic capacity is given by the LMH specification [l / (m2 * h)]. The permeability to be achieved is calculated according to [l / (m 2 * h * bar)], which in practice (in the raw water filtration) depends on the pore size of the filter elements and the blocking potential of the liquid to be filtered as well as the selected operating point.
    The reduction of blocking of the filter and the concomitant reduction of the filter performance can be further supported by the fact that according to a further aspect of the method according to the invention, the supply of the liquid to be cleaned to the at least one filter element via a cyclone flow. The cyclone flow artificially generated during pressure filtration by pumping means and / or flow means with their controlled centrifugal forces within the filter housing also reduces the deposition of particles on the filter surface.
    A further blocking reduction takes place in a further embodiment of the invention by the additional introduction of gas, in particular air, into the filter housing for the formation of nanobubbles. These nanobubbles also have a cleaning effect with respect to the at least one filter element, because they promote the creation of oscillating cavitation bubble fields (" soft cavitation ") upon application of ultrasound, and thereby additional filter cleaning takes place on the filter element.
    As stated above, it is preferable to monitor the increase in operating pressure and / or hydraulic throughput during filtration. An increase in the operating pressure or a reduction in the hydraulic throughput is an indication of an increasing blocking 5/22 5 of the at least one filter element. In a particularly preferred embodiment of the invention, it is provided that, when a predefinable threshold value for the increase in operating pressure and / or hydraulic throughput is exceeded, at least one cleaning step interrupts the filtration, water, air and / or ultrasound being used as cleaning agent for cleaning the at least one Filter element is used. It is particularly preferred in this case that the cleaning of the filter element takes place within the filter housing, so that the filter element does not have to be removed. The cleaning step can be operated in the forward-flush mode as well as in the back-wash-flush-mode, optionally with negative pressure or overpressure.
    The aim of the method according to the invention is to obtain a concentration of the particles in the drainage liquid in the retentate, without forming a too strong and strong filter cake on the filter element, which would require a complex purification step. Upon achievement of a predeterminable value for the concentration of solids fraction monitored, for example, by in-situ turbidity measurement or monitoring of transmembrane pressure, and / or hydraulic throughput, the start of an automatic cleaning cycle occurs.
    The filtration process according to the invention can be operated continuously, semicontinuously or discontinuously, wherein preferably the filtration and optionally subsequent cleaning cycles are carried out fully automatically.
    The above-described object is further characterized by a device for the filtration of liquids with a solids fraction, in particular raw, service, process and salt water and waste water from industry and / or communities, with a filter housing in which at least one filter element is arranged, wherein at least one pressure generating device (eg gradient line, pumping device) is provided, which supplies the liquid under pressure via at least one inlet to the at least one filter element, and the filter housing has at least one outlet for the permeate and concentrate, wherein according to the invention at least one ultrasonic transducer on or within the filter housing is provided. This device is particularly suitable for carrying out the method according to the invention described above. 6/22 6
    In a particularly preferred embodiment of the invention, the filter housing is tube-like with a head part, a housing shell and a bottom part formed, wherein the filter housing has a round, elliptical, square, rectangular or polygonal cross section.
    According to the invention, it is provided that the at least one ultrasonic transducer is arranged on the outside and / or the inside of the filter housing, preferably on the housing jacket. Here, the filter housing, particularly preferably the housing shell is used as vibration transmitter for the ultrasonic transducer, so that the sound waves propagate through the liquid to be purified and / or through the permeate and achieve a targeted full cleaning of the filter element by transient cavitation and optionally a disinfection of liquids and / or or cause solids.
    In an alternative embodiment of the invention, the at least one ultrasonic transducer is arranged in a submersible body, which can be arranged within the filter housing. Here, the immersion body acts as an ultrasonic generator, which is immersed in the liquid to be cleaned within the filter housing.
    In order to avoid PA shading, in a preferred embodiment of the invention, the at least one ultrasonic transducer and / or the immersion body is pivotally and / or rotatably arranged in or on the filter housing.
    Additionally or alternatively, in a further variant of the device according to the invention, the at least one filter element within the filter housing is pivotally and / or rotatably arranged.
    In a particularly preferred embodiment of the invention, the at least one filter element is tube-like. This filter element can in this case be used in two operating modes, either in / out, wherein the liquid to be cleaned is introduced into the interior of the tubular filter element under pressure, and the permeate exits on the outside of the filter element, or from Out / In, in which the Filtration direction from the outside into the interior of the filter element takes place. 7/22 7
    In order to achieve particularly good separating powers of 20.0 μm to 0.1 μm, a combination filter is used according to the invention, wherein the first infiltrated filter element is at least one coarse filter and the second filter element is at least one fine filter. However, the combination filter may also consist of more than two filter elements (e.g., coarse, medium and fine filters). These two filter elements are in this case arranged in the device according to the invention within the filter housing and can be operated both in the OUT / IN or IN / OUT mode.
    Particularly preferably, it is provided that the first filter element and the second filter element are tubular and preferably substantially coaxial with each other, wherein the respective cross section of the two filter elements is round, elliptical, square, rectangular or polygonal.
    In order to achieve the desired full cleaning with the required selectivity, the at least one filter element is a textile filter, a plastic filter, a powder-sintered metal filter or a metal mesh filter or combinations thereof.
    To carry out the method according to the invention, the device has an inlet for the liquid to be cleaned, wherein the at least one inlet is arranged in the head part of the filter housing, and the at least one outlet for the permeate is arranged in the bottom part of the filter housing within the at least one tubular filter element. This arrangement is used in out / in filtration. Preferably, at least one further outlet for the concentrate (drainage) is additionally provided in the bottom part of the filter housing.
    Particularly preferably, the at least one outlet for the permeate discharges into a collecting basin in the area of the bottom part of the filter housing, wherein the collecting basin has an outlet for the permeate. In addition, if appropriate, at least one further sequence for the concentrated retentate is provided.
    In a further embodiment of the invention, at least one radially and / or diagonally and / or parallel to at least one wall portion of the housing shell arranged separating element is provided in the filter housing, which is the interior of the 8/22
    Filter housing divided into at least two sections, wherein each section is associated with at least one filter element and preferably each an inlet or a drain. Each section thus forms a filtration unit, which is preferably operated independently of the adjacent sections.
    Finally, the invention also relates to a filter element for cleaning contaminated liquids, in particular raw, service, process and sea water, and wastewater consisting of a first filter unit having a first filter characteristic and at least a second filter unit having a second filter characteristic, wherein the first and the at least one second filter unit are tube-like, and are arranged coaxially with each other.
    These filter units can in this case be spaced apart from one another or arranged in surface contact with one another.
    The inventive method and the associated apparatus have proved to be particularly suitable for use for the purification of raw water and for (pre) cleaning of seawater in desalination plants and process, service and wastewater.
    The invention is explained in more detail below with reference to non-limiting exemplary embodiments with associated figures. Show in it
    1 is a schematic sectional view of a first embodiment of the invention along the longitudinal axis,
    2 shows a schematic sectional view of a second embodiment of the invention along the longitudinal axis,
    Figs. 3a and 3b, a third embodiment of the invention along the longitudinal axis and in cross section, and
    4 shows a schematic representation of a system with the device according to the invention from FIG. 2.
    In Fig. 1, the device 100 according to the invention is shown with a tubular filter housing 110, which has a circular cross-section in the present embodiment. To the longitudinal axis A, a likewise tubular filter element 120 is arranged coaxially. On the outside of the 9/22 9
    Filter housing 110 is a plurality of ultrasonic transducer 130 is arranged, which set the filter housing 110 in vibration.
    The liquid to be purified is introduced via an inlet 111 into the interior of the filter housing 110 under pressure, wherein in the present case, an out / in filtration is performed. The liquid to be cleaned in this case flows around the tubular filter element 120, while the permeate flows in the interior of the filter element 120 due to gravity transversely to the inflow along the longitudinal axis A to the bottom of the filter housing and can be withdrawn via a drain 112 continuously or discontinuously.
    Furthermore, venting devices 113 are provided which allow the escape of gases or air during filtration or cleaning out of the filter housing 110. At the bottom of a withdrawal 114 is additionally provided for the retentate.
    Since the cleaning water of the filter element 120 obtained in the cleaning step can not remain in the filter element 120, another drain 115 is provided for drainage.
    In the present embodiment, additional pumping means 140 is shown which functions as wastewater / raw water recirculation means, which may also be optionally equipped with ultrasonic transducers for disinfecting the liquid.
    2, a further embodiment of the device 100 according to the invention is shown, wherein the filter element 120 has three filter units 120a, 120b, 120c, which in turn are tubular, and whose longitudinal axes are arranged coaxially to the longitudinal axis A of the filter housing 110. The first filter unit 120a, the so-called prefilter, is a coarse filter with which the largest particles of the solids fraction are removed. This pre-filter 120a is in this case arranged adjacent to the filter housing 110, whose outer side, namely the housing jacket 110a, is again provided with ultrasound transducer 130. Thus, the pre-filter 120a is exposed to the strongest cavitation effects and its cleaning intensity is thus significantly increased. 10/22 10
    The second filter unit 120b is also a pre-filter, but has a smaller mean pore size with regard to the first filter unit 120a.
    Finally, the third filter unit 120c is a tubular fine filter (final filter), from the interior of which the permeate is drawn off via the outlet 112.
    In the two upper embodiments, the at least one tubular filter element 120 is always aligned coaxially with the longitudinal axis A of the filter housing 110.
    In contrast, in the apparatus 100 shown in FIGS. 3a and 3b in longitudinal or horizontal section, a plurality of tubular filter elements 120 are provided, whose longitudinal axes are arranged parallel, but not coaxial to the longitudinal axis A of the filter housing 110.
    On the outside of the filter housing 110 in turn ultrasonic transducer 130 are arranged. In addition, a likewise tubular immersion body 150 is provided, on the inside of which further ultrasonic transducers 130 are fastened, and which is arranged in the region of the longitudinal axis A of the filter housing 110. This immersion body 150 can optionally be configured rotatable and / or pivotable.
    Between immersion body 150 and housing shell 110a of the filter housing 110, which both have a polygonal cross-section, a plurality of tubular filter elements 120 are arranged; these can be designed either as a final filter or as a combined filter with its own prefiltration (FIG. 3b). In this case, the filter elements 120 have a substantially circular cross-section and, depending on their field of application, consist of a coarse, medium or fine filter unit and a final filter unit, which are oriented coaxially with one another and have two-dimensional contact with one another. In this case, the fine filter forms a first tube which is completely surrounded by the tubular coarse filter. These filter elements 120 are typically routed in OUT / IN mode of operation. Alternatively, it can also be provided that the pre-filter and the final filter are designed separately, but here is the suitable operating mode IN / OUT for the pre-filter (s) and OUT / IN for the fine filter or filters (final filter). 11/22 11
    These filter elements 120 are cyclically flowed around by the liquid to be cleaned, which is introduced via a head part 110 b with an inlet 111 into the interior of the filter housing 110. The permeate flows into a reservoir 110c in the bottom region of the filter housing 110, and can be withdrawn via the drain 112. The retentate is in turn removed via the removal 114 from the filter housing 110.
    If the device 100 shown in FIG. 3a is operated in the mode of operation IN70UT, then the feed of the raw water to be purified takes place via the inlet 15a, while the drainage liquid can be withdrawn again via the outlet 115a.
    FIG. 4 shows a filtration system 200 with the device 100 according to the invention. Via a pumping device 240, the liquid to be cleaned of the device 100 is supplied under pressure. Before the introduction of the liquid, the concentration of solids is determined in a turbidity measuring point 210. Furthermore, a pre-disinfection by means of ultrasound is optionally provided in a first disinfection device 220.
    A level probe 230 continuously monitors the level of liquid in the filter housing 110. Further, a pressure transmitter 250 for monitoring and communicating the operating pressure to a control unit (not shown) in the filter housing 110 is provided. In addition to the ventilation device 113 also supply lines 260, 270 are provided for rinse water and compressed air for filter cleaning. In addition, the pressure in the interior of the filter element 120 is monitored by means of a second pressure transmitter 250a. Finally, a blowing device 280 is provided for forming nano-bubbles.
    The ultrasound transducers 130 are controlled via an ultrasound generator 290, which in turn is connected to the control device and is controlled by the latter.
    The permeate is disinfected in this embodiment of the invention via a further optional external disinfection device 220a, after it has been replaced by a 12/22 12
    Measuring point 251 has flowed through to determine the amount of permeate and thus to determine the throughput of the system 200.
    Preferably, a simultaneous disinfection of the liquid during the filtering operation by ultrasound irradiation can also take place and / or additionally a separate upstream and / or downstream disinfection device can be provided.
    Finally, a collector 300 for the retentate and the drainage, which is obtained during the cleaning of the filter elements 120, 120a, 120b, is provided, wherein a vacuum pump 310 supports the removal of these fractions.
    It should be understood that these embodiments are to be considered in a non-limiting manner. In particular, the number of filter elements, their shape and arrangement vary. Likewise, the system may have other measuring and control devices, cleaning devices and other elements as they are common in filtration systems. 13/22
    权利要求:
    Claims (30)
    [1]
    13 PATENT CLAIMS 1. Process for the filtration of liquids, in particular raw, service, process and sea water and waste water from industry and / or municipalities, wherein the liquid to be purified is pressurized into at least one inlet (111) in a filter housing (110) is introduced and a solids fraction contained in the liquid via at least one in the filter housing (110) arranged filter element (120, 120a, 120b) is separated under pressure, characterized in that the pressure filtration is carried out with ultrasound support.
    [2]
    2. The method according to claim 1, characterized in that in addition a disinfection of the supplied liquid and / or at the inlet (111) facing side of the at least one filter element (120, 120a, 120b) forming concentrate and / or at the The permeate which forms the inlet (111) facing away from the at least one filter element (120, 120a, 120b) is formed by means of ultrasound.
    [3]
    3. The method according to claim 2, characterized in that the disinfection takes place outside of the filter housing (110) in a separate from the filter housing (110) disinfection reactor (220).
    [4]
    4. The method according to claim 2, characterized in that the disinfection takes place within the filter housing (110).
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that additionally takes place a filter cleaning by means of ultrasound.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that the ultrasonic power input is adjustable.
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that the supply of liquid to be cleaned to the at least one filter element (120, 120a, 120b) takes place via a cyclone flow. 14/22 14
    [8]
    8. The method according to any one of claims 1 to 7, characterized in that in addition gas, in particular air, is introduced into the filter housing (110) for the formation of Nanoblasen.
    [9]
    9. The method according to any one of claims 1 to 8, characterized in that there is a monitoring of the increase in the operating pressure and / or the hydraulic throughput during the filtration.
    [10]
    10. The method according to claim 9, characterized in that when exceeding a predetermined threshold for the increase of the operating pressure and / or the hydraulic throughput at least one cleaning step interrupts the filtration, wherein as a cleaning agent water, air and / or ultrasound for cleaning the at least one filter element is used.
    [11]
    11. The method according to any one of claims 1 to 10, characterized in that the filtration is carried out continuously, semicontinuously or discontinuously.
    [12]
    12. The method according to any one of claims 1 to 11, characterized in that the filtration and optionally subsequent cleaning cycles are fully automatic.
    [13]
    13. Device (100) for the filtration of liquids with a solids fraction, in particular raw, process water, salt water and waste water from industry and / or communities, with a filter housing (110) in which at least one filter element (120, 120a , 120b), wherein at least one pressure generating device (240) is provided, which supplies the liquid under pressure via at least one inlet (111) to the at least one filter element (120, 120a, 120b), and the filter housing (110) via at least one Drain (112) for the permeate and concentrate has, characterized in that at least one ultrasonic transducer (130) is provided on or within the filter housing (110).
    [14]
    14. Device (100) according to claim 13, characterized in that the filter housing (110) is tube-like with a head part (110b), a housing shell (11Oa) and a bottom part, wherein the filter housing (110) has a round , elliptical, square, rectangular or polygonal cross-section.
    [15]
    15. Device (100) according to claim 13 or 14, characterized in that the at least one ultrasonic transducer (130) on the outside and / or the inside of the filter housing (110), preferably on the housing shell (110a) is arranged.
    [16]
    16. Device (100) according to one of claims 13 to 15, characterized in that at least two filter elements (120, 120a, 120b) are arranged in the filter housing (110), wherein the first filter element (120a) at least one coarse or pre-filter and the second filter element (120b) is at least one fine or final filter, and preferably at least one further filter element is arranged between the first and second filter element (120a, 120b).
    [17]
    17. Device (100) according to one of claims 13 to 16, characterized in that the at least one ultrasonic transducer (130) is arranged in a submersible body (150) which can be arranged within the filter housing (110).
    [18]
    18. Device (100) according to any one of claims 13 to 17, characterized in that the at least one ultrasonic transducer (130) and / or the immersion body (150) is arranged pivotably and / or rotatably.
    [19]
    19. Device (100) according to one of claims 13 to 18, characterized in that the at least one filter element (120, 120a, 120b) is arranged pivotable and / or rotatable within the filter housing (110).
    [20]
    20. Device (100) according to one of claims 13 to 19, characterized in that the at least one filter element (120, 120a, 120b) is tube-like. 16/22 16
    [21]
    21. Device (100) according to any one of claims 14 to 20, characterized in that the inlet (111) to be cleaned liquid in the head part (110 b) of the filter housing (110) is arranged, and the at least one outlet (112) for the permeate in the bottom part of the filter housing (110) within the at least one tubular filter element (120, 120a, 120b) is arranged.
    [22]
    22. Device (100) according to one of claims 14 to 21, characterized in that the at least one outlet (112) for the permeate in a reservoir (110c) in the region of the bottom part of the filter housing (110) opens, wherein the reservoir is an outlet for the permeate.
    [23]
    23. Device (100) according to claim 20, characterized in that the first filter element (120, 120a, 120b) and the second filter element (120, 120a, 120b) are tubular and preferably arranged substantially coaxially with each other, wherein the respective cross section the two filter elements is round, elliptical, square, rectangular or polygonal.
    [24]
    24. Device (100) according to any one of claims 13 to 23, characterized in that the at least one filter element (120, 120a, 120b) is a textile filter, a plastic filter, a powder sintered metal filter or a metal mesh filter.
    [25]
    25. Device (100) according to claim 13, wherein at least one separating element which is arranged radially and / or diagonally and / or parallel to at least one wall section of the housing shell is provided in the filter housing (110) Filter housing (110) divided into at least two sections, each section at least one filter element (120, 120a, 120b) and preferably each one inlet (111) or a drain is assigned.
    [26]
    26. Filter element (120, 120a, 120b) for cleaning contaminated liquids, in particular raw, service, process and sea water, and waste water consisting of a first filter unit having a first filter characteristic and at least one second filter unit having a second filter characteristic, wherein the first and the at least one second filter unit are tube-like, and are arranged coaxially with one another.
    [27]
    27. Filter element (120, 120a, 120b) according to claim 26, characterized in that the first filter unit is arranged at a distance from the at least one second filter unit.
    [28]
    28. Filter element (120, 120a, 120b) according to claim 26, characterized in that the first filter unit is in surface contact with the at least one second filter unit.
    [29]
    29. Use of a device (100) according to any one of claims 13 to 25 for the purification and / or desalination of seawater under pressure.
    [30]
    30. Use of a device (100) according to any one of claims 13 to 25 for the purification of raw, service, process, marine and waste water under pressure. 2013 11 29 Ha / St 18/22
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    同族专利:
    公开号 | 公开日
    AT513225A3|2015-06-15|
    AT513225B1|2015-09-15|
    WO2015079062A1|2015-06-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
    2020-04-15| PC| Change of the owner|Owner name: PVS GMBH, AT Effective date: 20200302 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50785/2013A|AT513225B1|2013-11-29|2013-11-29|Process for the filtration of liquids|ATA50785/2013A| AT513225B1|2013-11-29|2013-11-29|Process for the filtration of liquids|
    PCT/EP2014/076087| WO2015079062A1|2013-11-29|2014-12-01|Method and device for filtering liquids|
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