WO2015079062A1 - Procédé et dispositif pour la filtration de liquides - Google Patents

Procédé et dispositif pour la filtration de liquides Download PDF

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Publication number
WO2015079062A1
WO2015079062A1 PCT/EP2014/076087 EP2014076087W WO2015079062A1 WO 2015079062 A1 WO2015079062 A1 WO 2015079062A1 EP 2014076087 W EP2014076087 W EP 2014076087W WO 2015079062 A1 WO2015079062 A1 WO 2015079062A1
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WO
WIPO (PCT)
Prior art keywords
filter
filter element
filter housing
housing
filtration
Prior art date
Application number
PCT/EP2014/076087
Other languages
German (de)
English (en)
Inventor
Kurt Gassner
Original Assignee
Kurt Gassner
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kurt Gassner filed Critical Kurt Gassner
Publication of WO2015079062A1 publication Critical patent/WO2015079062A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/52—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D33/54—Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/08—Regeneration of the filter
    • B01D2201/087—Regeneration of the filter using gas bubbles, e.g. air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/08—Regeneration of the filter
    • B01D2201/088—Arrangements for killing microorganisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
    • B01D29/603—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by flow measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
    • B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D29/72—Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/003—Coaxial constructions, e.g. a cartridge located coaxially within another
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/03—Pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/02—Fluid flow conditions
    • C02F2301/026—Spiral, helicoidal, radial
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/06—Pressure conditions
    • C02F2301/066—Overpressure, high pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/14—Maintenance of water treatment installations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens

Definitions

  • the invention relates to a method for the filtration of liquids, in particular drinking, service, process and salt water and waste water from industry and / or communities, wherein the liquid to be purified is introduced via at least one inlet under pressure into a filter housing, at least one in The liquid fraction contained solids fraction is filtered off via at least one arranged in the filter housing filter element under pressure, wherein the pressure filtration is carried out with ultrasound support, 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 ⁇ m to 0.1 ⁇ m. As a result, the costs for the acquisition and operation of these multi-stage systems are particularly high.
  • WO 2012/104493 A1 describes a method and a device of the type mentioned above, wherein investigations by the applicant have shown that, despite the tangential supply of the liquid to be cleaned, a rapid blocking of the filter element takes place. Furthermore, it is a static system that does not respond to changed feed conditions, i. Changes to the amount of wastewater fed, can react flexibly.
  • This object is achieved by a method of the type mentioned above, characterized in that there is a monitoring of the increase in operating pressure and / or the hydraulic throughput during filtration.
  • the filtration of liquids is assisted by the introduction of ultrasonic waves, while at the same time monitoring 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 blockage of the at least one filter element.
  • the ultrasound entry during filtration can be done case by case, periodically or permanently.
  • the duration and / or the intensity of the ultrasonic input is selected as a function of the feed conditions, in particular the feed rate and the solids content and the particle size in the liquid to be cleaned.
  • the aim of the method according to the invention is thus 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.
  • concentration of the 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.
  • 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. 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 invention 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.
  • a microbial load for example seawater
  • Reversible filter pore blockages are steric pore blockages, with particle sizes larger than diameter the pore channels is.
  • 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.
  • 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.
  • biofouling on filter surfaces is explained, for example, in “Flemming, H.C., Biofouling in Membrane Processes, Springer Verlag, Berlin 1995".
  • 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.
  • NTU value turbidity increase
  • the resulting cavities (bubbles) in the liquid mainly contain liquid or water vapor.
  • 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 creating 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.
  • 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 produced largely prevents the formation of a constantly growing gel-like biofilm layer on the membrane top. surface of RO systems or other downstream cleaning systems, in particular in ultra-nano- or hyperfiltration. 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.
  • the filtration process according to the invention is operated here as a medium-pressure filtration with a maximum pressure of 6 bar.
  • an advantage of the present embodiment of the invention is that disinfection of the permeate and concentrate (retentate) due to the microbiological effect described above is achieved by the combined use of suitable ultrasound irradiation with 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.
  • the ultrasonic power input can be regulated.
  • 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.
  • the sound flow [m 3 / s], the sound intensity [W / cm 2 ], the acoustic characteristic impedance (Z F ; [N * S / m 3 ]) and the energy density [W / 1] can be controlled during filtration.
  • the regulation of the sound duration [s] or the periodic entry of the ultrasonic waves during filtration and / or the filter cleaning is adjustable.
  • TMP trans-membrane pressure difference of the filter elements
  • P permeate
  • P permeate
  • LMH the trans-membrane pressure difference of the filter elements
  • P permeate
  • the definition of the filter area with regard to the hydraulic capacity is given by LMH specification [l / (m 2 * h)].
  • the permeability to be achieved is calculated as [l / (m 2 * h * bar)], which in practice (in the case of raw water filtration) depends on the pore size of the filter element. elements and the blocking potential of the liquid to be filtered as well as the selected operating point.
  • the reduction of blockages 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 inventive method, 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.
  • the raw water within the filter housing is particularly preferably hydraulically circulated through the circulation loop.
  • This hydraulic circulation additionally reduces the blocking potential of 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.
  • gas in particular air
  • These nanobubbles also have a cleaning effect with respect to the at least one filter element, because they promote the formation of oscillating cavitation bubble fields ("soft cavitation") when using ultrasound, and thereby an additional filter cleaning takes place on the filter element.
  • 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 water, process water, salt water and waste water from industry and / or communities, with a filter housing in which at least one filter element is arranged.
  • at least one pressure generating device eg gradient line, pumping device
  • the filter housing has at least one outlet for the permeate and concentrate, wherein at least one ultrasonic transducer or provided within the filter housing.
  • At least one Device for determining the liquid level in the filter housing preferably a level sensor for and / or at least one device for monitoring and transmitting the operating pressure to at least one control unit, preferably a pressure transmitter are provided.
  • This device is particularly suitable for carrying out the method according to the invention described above.
  • 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.
  • the at least one ultrasonic transducer is arranged on the outside and / or the inside of the filter housing, preferably on the housing jacket.
  • 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.
  • the at least one ultrasonic transducer is arranged in a submersible body, which can be arranged within the filter housing.
  • the immersion body acts as an ultrasonic generator, which is immersed in the liquid to be cleaned within the filter housing.
  • the at least one ultrasonic transducer and / or the immersion body is pivotally and / or rotatably arranged in or on the filter housing.
  • the at least one filter element within the filter housing is pivotally and / or rotatably arranged.
  • 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.
  • a combination filter is used, wherein the first flowed-filter element is at least one coarse filter and the second filter element is at least one fine filter.
  • the combination filter can also consist of more than two filter elements (eg 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.
  • 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.
  • At least one, preferably two or more disk-like filter elements are provided, which are arranged in planes normal to the longitudinal axis within the filter housing.
  • the at least one disk-like filter element can be round, elliptical, square, rectangular or polygonal.
  • 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.
  • 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.
  • at least one further outlet for the concentrate (drainage) is additionally provided in the bottom part of the filter housing.
  • 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.
  • at least one further sequence for the concentrated retentate is provided.
  • at least one flow device it is particularly preferable for at least one flow device to be arranged inside the filter housing.
  • the flow device is a distributor with preferably adjustable guide vanes.
  • the at least the flow device may be a circulation pump.
  • 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 which divides the interior of the filter housing into at least two sections, each section at least one filter element and preferably in each case an inlet or a drain is assigned. Each section thus forms a filtration unit, which is preferably operated independently of the adjacent sections.
  • the invention also relates to a filter element for the purification of contaminated liquids, in particular raw, service, process and seawater, 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 preferably 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.
  • Fig. 1 is a schematic sectional view of a first embodiment of
  • Fig. 2 is a schematic sectional view of a second embodiment of
  • FIG. 3a and Fig. 3b shows a third embodiment of the invention along the longitudinal axis and in cross section;
  • FIG. 4 shows a schematic representation of a first filtration system with the device according to the invention from FIG. 2;
  • Fig. 5 is a schematic representation of a second filtration system according to the invention.
  • Fig. 6 is a schematic sectional view of the pre-filter stage along the
  • FIG. 7 Fig. 7 and a sectional view of the pre-filter stage of FIG. 5 along the
  • the device 100 is shown with a tubular filter housing 110, which has a circular cross-section in the present embodiment.
  • a likewise tubular filter element 120 is arranged coaxially.
  • a plurality of ultrasonic transducers 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 110 and can be withdrawn via a drain 112 continuously or discontinuously.
  • venting devices 113 are provided which allow the escape of gases or air during filtration or cleaning out of the filter housing 110.
  • a withdrawal 114 is additionally provided for the retentate.
  • an additional pumping device 140 which functions as a wastewater / raw water recirculation means, which may also be optionally equipped with ultrasonic transducers for disinfecting the liquid.
  • This additional pumping device 140 allows the generating a hydraulic circulation of the liquid contained in the filter housing 110, whereby a blocking of the surface of the filter 120 is further reduced.
  • 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 from the raw water.
  • 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.
  • the pre-filter 120a is exposed to the strongest cavitation effects, and its cleaning intensity is thus significantly increased.
  • 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.
  • 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.
  • the at least one tubular filter element 120 is always aligned coaxially with the longitudinal axis A of the filter housing 110.
  • a multiplicity 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.
  • ultrasonic transducer 130 On the outside of the filter housing 110 in turn ultrasonic transducer 130 are arranged.
  • 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.
  • 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).
  • the filter elements 120 have a substantially circular cross section and, depending on their field of use, consist of a coarse, medium or fine Filter unit and a final filter unit, which are coaxial with each other and have a surface contact with each other.
  • 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.
  • 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).
  • 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.
  • a filtration system 200 with the device 100 according to the invention is shown.
  • the liquid to be cleaned of the device 100 is supplied under pressure.
  • the concentration of solids is determined in a turbidity measuring point 210.
  • a pre-disinfection by means of ultrasound is provided in a first disinfection device 220.
  • a level probe 230 continuously monitors the level of liquid in the filter housing 110.
  • a pressure transmitter 250 for monitoring and communicating the operating pressure to a control unit (not shown) in the filter housing 110 is provided.
  • a control unit (not shown) in the filter housing 110
  • supply lines 260, 270 are provided for rinse water and compressed air for filter cleaning.
  • the pressure in the interior of the filter element 120 is monitored by means of a second pressure transmitter 250a.
  • 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 passed through a measuring point 251 for determining the amount of permeate and thus for determining the throughput of the plant 200.
  • 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.
  • 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.
  • FIGS. 5 to FIG. 7 A further variant of the invention can FIGS. 5 to FIG. 7 are taken.
  • This is a two-stage filtration system 200a consisting of a first stage 201a, which performs a pre-filtration of the inlet 111, and a second stage 202a, in which permeate is finally purified from the first stage 201a with ultrasound assistance.
  • the first stage 201a in turn consists of a filter housing 110, in which a nozzle 300 is arranged, which has a guide tube 310 with tangential hole channels and continuously variable guide vanes 320.
  • This nozzle 300 causes when supplying the waste water to be cleaned to the surface of the filter element 120, a high hydraulic turbulence, which in addition to the generated tangential surface flow largely prevents a solid deposit on the filter surface.
  • the final purification of the permeate takes place from the first stage 201a, in which case particles with an average diameter of less than 10 ⁇ m are filtered out.
  • the filter element 120 used in this case is a very fine filter whose blocking is prevented by means of ultrasound-assisted backwashing.
  • an intermediate container 400 for the permeate from the first stage 201a is provided as a buffer means.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L'invention concerne un procédé pour la filtration de liquides, en particulier d'eaux brutes, d'eaux industrielles, d'eaux de traitement et d'eau de mer, ainsi que d'eaux usées issues de l'industrie et/ou des communes, le liquide à épurer étant introduit sous pression, au moyen d'au moins une entrée (111), dans un carter de filtre (110) et au moins une fraction solide contenue dans le liquide étant filtrée sous pression au moyen d'au moins un élément filtrant (120, 120a, 120b) disposé dans le carter de filtre (110), la filtration sous pression et le cas échéant le nettoyage du filtre s'effectuant avec assistance ultrasonique exécutée au cas par cas, périodiquement ou en permanence, et le cas échéant avec une désinfection du perméat et/ou du concentrat du liquide.
PCT/EP2014/076087 2013-11-29 2014-12-01 Procédé et dispositif pour la filtration de liquides WO2015079062A1 (fr)

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ATA50785/2013A AT513225B1 (de) 2013-11-29 2013-11-29 Verfahren zur Filtration von Flüssigkeiten
ATA50785/2013 2013-11-29

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Publication number Priority date Publication date Assignee Title
CN111203020A (zh) * 2020-02-12 2020-05-29 深圳市陶氏水处理设备技术开发有限公司 一种净水滤瓶自动清洗***
CN111617537A (zh) * 2020-06-11 2020-09-04 田聪 一种高效过滤污水的处理方法
WO2021026624A1 (fr) * 2019-08-15 2021-02-18 Hauenstein Ruch Murilo Dispositif multi-filtrant
US11007287B2 (en) 2016-02-25 2021-05-18 King Abdullah University Of Science And Technology Acoustically excited encapsulated microbubbles and mitigation of biofouling
CN113101732A (zh) * 2021-04-21 2021-07-13 李新 一种便携式润滑油过滤装置
WO2021189823A1 (fr) * 2020-03-27 2021-09-30 中国华能集团清洁能源技术研究院有限公司 Système et procédé de traitement des eaux par distillation à membrane assistée par ultrasons
CN117942899A (zh) * 2024-03-25 2024-04-30 福建常青新能源科技有限公司 一种三元前驱体生产用浓缩设备

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EP3110521B1 (fr) 2014-02-28 2017-12-20 ANTEL Aritma Tesisleri Insaat Sanay Ve Ticaret Anonimim Sirketi Ensemble de filtration pour criblage progressif de particules fines et grosses dans une unité de fonctionnement simple
CN113332774B (zh) * 2021-04-26 2022-05-31 杭州泉尚环境科技有限公司 一种废水处理用智能监控***

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DE2427053A1 (de) * 1973-06-06 1975-01-02 Huntingdon Ltd Jahn Vorrichtung zum filtern von viskosem material
WO1989005184A1 (fr) * 1987-12-02 1989-06-15 Kari Uljas Laiho Procede et moyen de filtrage et d'homogeneisation de substances liquides
GB2377187A (en) * 2001-06-04 2003-01-08 Jr James Benenson Cleaning water filter using brush, scraper, spray, reverse flow or ultrasound
DE102006057996A1 (de) * 2006-12-08 2008-06-12 Aquaworx Ag Filtermodul
US20080296236A1 (en) * 2007-05-30 2008-12-04 Gross David J Apparatus and method for increasing filter capacity using ultrasonic regeneration
DE102007037525A1 (de) * 2007-08-09 2009-02-12 Joma-Polytec Kunststofftechnik Gmbh Ölfiltersystem und Verfahren zum Betreiben eines Ölfiltersystems
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11007287B2 (en) 2016-02-25 2021-05-18 King Abdullah University Of Science And Technology Acoustically excited encapsulated microbubbles and mitigation of biofouling
EP3419742B1 (fr) * 2016-02-25 2022-12-14 King Abdullah University Of Science And Technology Micro-bulles encapsulées à excitation acoustique et atténuation d'encrassement biologique
WO2021026624A1 (fr) * 2019-08-15 2021-02-18 Hauenstein Ruch Murilo Dispositif multi-filtrant
CN111203020A (zh) * 2020-02-12 2020-05-29 深圳市陶氏水处理设备技术开发有限公司 一种净水滤瓶自动清洗***
WO2021189823A1 (fr) * 2020-03-27 2021-09-30 中国华能集团清洁能源技术研究院有限公司 Système et procédé de traitement des eaux par distillation à membrane assistée par ultrasons
CN111617537A (zh) * 2020-06-11 2020-09-04 田聪 一种高效过滤污水的处理方法
CN113101732A (zh) * 2021-04-21 2021-07-13 李新 一种便携式润滑油过滤装置
CN113101732B (zh) * 2021-04-21 2023-02-24 李新 一种便携式润滑油过滤装置
CN117942899A (zh) * 2024-03-25 2024-04-30 福建常青新能源科技有限公司 一种三元前驱体生产用浓缩设备

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AT513225A3 (de) 2015-06-15
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