WO2002076572A1 - Appareil de filtrage de solides en suspension dans l'eau - Google Patents

Appareil de filtrage de solides en suspension dans l'eau Download PDF

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Publication number
WO2002076572A1
WO2002076572A1 PCT/KR2002/000445 KR0200445W WO02076572A1 WO 2002076572 A1 WO2002076572 A1 WO 2002076572A1 KR 0200445 W KR0200445 W KR 0200445W WO 02076572 A1 WO02076572 A1 WO 02076572A1
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WO
WIPO (PCT)
Prior art keywords
backwash
filter medium
filter
water
suspended matter
Prior art date
Application number
PCT/KR2002/000445
Other languages
English (en)
Inventor
Ki-Beak Han
Original Assignee
Nanoentech Co., Ltd.
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 Nanoentech Co., Ltd. filed Critical Nanoentech Co., Ltd.
Priority to JP2002575081A priority Critical patent/JP2004524964A/ja
Publication of WO2002076572A1 publication Critical patent/WO2002076572A1/fr

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Classifications

    • 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
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/10—Brush filters ; Rotary brush filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/18—Filters characterised by the openings or pores
    • B01D2201/184—Special form, dimension of the openings, pores of the filtering elements

Definitions

  • the present invention relates to a filter apparatus for the filtration, separation, and removal of solids suspended in water, including particulates, algae, etc., and more particularly, to a filter apparatus for the filtration, separation, and removal of solids suspended in water, capable of continuously concentrating and discharging the suspended solids accumulated on the layer of a filter medium.
  • the present invention relates to a filter apparatus for filtering solids suspended in water capable of controlling filtration efficiency, filtration rate, and the amount of filtered water by using different kinds of flexible, elastic filter media to adjust the porosity and pore size of the filter layer according to the kind and density of the filter media and the hydraulic pressure of supplied source water.
  • a filtration process includes a plurality of physical and chemical unit operations, including diffusion, straining, interception, impaction, sedimentation, flocculation, and adsorption of suspended matter in water, such as particulates, algae, etc., which form a cooperative, complex mechanism to remove the suspended matter and draw off clarified water.
  • the filtering capability of a filter apparatus is evaluated by the suspended matter removal efficiency, filtration rate, filtration duration, the frequency of backwashing, the amount of backwash water used, backwash duration, etc.
  • granular filter media such as sand, anthracite, activated carbon, clay, ground magnetite, garnet, deactivated media, etc., are used for a filtration process.
  • filter media can be purchased easily and can be easily applied to a filter apparatus, but needs a big filter apparatus for its installation.
  • a space for entrapping suspended particulates is limited to only near the surface of the filter layer, and the filter media have a fixed pore structure.
  • a reduction in pore size of the filter layer or clogging of the pores occurs due to the suspended particulates, and the headloss is increased due to the filtration resistance. Accordingly, flow channeling or break-through of the filter layer occurs, thereby increasing the frequency of b- ckwashing the layer of the filter medium and the amount of backwash water.
  • an improved rotary-backwashing type high-purity filter apparatus is disclosed in Korean Patent Application No. 1997-023068 where one end of filter cloth of latitude direction threads radially attached to the side of a rotary porous drum is extended a rotary spring fixed to the wall of a pressured container to form a filter layer by the rotation of the rotary porous drum and the tension of the spring.
  • backwashing is achieved by repetitive forward and backward rotations of the porous drum.
  • a permanent filter apparatus with a variable filter layer is disclosed in Korean Patent Application NO. 1998-0405542 in which tension of filter cloth of latitude direction threads is formed by the pressure of the source water when filtering the source water and loosened by the pressure of the air and water supplied for backwashing.
  • this repetitive pressing and relaxing of the filter cloth with a piston cause fibers of the filer medium to be seriously tangled or damaged.
  • the filter layer is formed as a monolayer for filtration, a space for entrapping particulates is too small to entrap enough particulates.
  • Other disadvantages of the filter apparatus are; short filtration duration, frequent backwashing, low filtration rate, the inability .to handle fluctuating composition of source water, and the requirement for a relatively large amount of backwash water.
  • the present inventor has filled a patent application for an apparatus and method for filtering suspended solids from fluid using flexible fibers (Korean Patent Application No. 1999-013396).
  • the depth of a filter layer and a space for entrapping particulates are freely adjustable according to the length of the fibers used for a filter medium, and the porosity, pore size, the amount of particulates to be filtered out, and the quality of clarified water can be easily controlled by the density of the flexible fibers in the filter medium. Therefore, the filter apparatus can effectively cope with fluctuating composition of source water, but it is hard to automate filling the filter medium with the flexible and elastic fibers. Disclosure of the Invention
  • the filter apparatus has extended filtration duration and the reduced frequency of backwashing and can handle fluctuating composition of source water, thereby producing clarified water which can be used as regular drinking water.
  • the filter medium is inserted into the filter apparatus in the direction of its length with one end fixed to a filter medium fixing flange having backwash air diffuse holes or to a filter medium fixing flange having backwash water diffuse holes.
  • a filter apparatus for filtering a various kinds of suspended matter in source water
  • the filter apparatus comprising: a filter medium formed of flexible fibers of thread type which is installed in a cylindrical member and entraps the suspended matter contained in the source water supplied into the cylindrical member; a filter medium fixing flange to which one end of the filter medium is fixed and which has a plurality of diffuse holes for a backwash material for backwashing the filter medium; containment plates appropriately installed in the cylindrical member to prevent the efflux of the suspended matter entrapped by the filter medium, based on the hydraulic pressure of the source water to be filtered through the filter medium, the density of the filter medium, and the state of the suspended matter entrapped by the filter medium; a source water supply unit and a backwash material supply unit which supply the source water and the backwash material, respectively, to the filter medium; a clarified water discharge unit which discharges clarified water filtered through the filter medium; a continuous concentrated filtrate discharge unit which discharges the suspended matter entrap
  • the backwash water supply unit comprises a backwash air supply unit and a backwash water supply unit
  • the backwash air supply unit comprises a horizontal backwash air supply unit for horizontally supplying backwash air into the filter medium and a vertical backwash air supply unit for vertically supplying backwash air into the filter medium.
  • the other end of the filter medium remains unfixed such that the filter medium swells vertically when turbulence occurs in the filter medium due to the backwash and backwash air supplied perpendicular to one another into the filter medium, to thereby easily separate the suspended matter entrapped by the filter medium.
  • the backwash air supply unit, the backwash water supply unit, the source water supply unit, the clarified water discharge unit, the backwash water discharge unit, and the continuous concentrate filtrate discharge unit are provided with respective supply and discharge valves.
  • a backwash air supply valve, a backwash water supply valve, and a backwash water discharge valve are closed, and a source water supply valve, a continuous concentrate filtrate discharge valve, and a clarified water discharge valve are opened
  • the source water is supplied into the filter medium by operating a source water supply water to produce the clarified water via the clarified water discharge unit and simultaneously continuously discharge the concentrated suspended matter entrapped by the filter medium via the continuous concentrated filtrate discharge unit.
  • Backwashing is performed on the filter medium while the source water supply valve and the clarified water discharge valve are closed, and the backwash air supply valve, the backwash water supply valve, and the backwash water discharge valve are opened.
  • the filter apparatus further comprises a porous backwash air pipeline member installed parallel to the filter member with a smaller length then the filter member, the porous backwash air pipelined member having a plurality of air pores for diffusing backwash air in a direction perpendicular to the filter medium.
  • simultaneously backwash air may be vertically supplied into the filter medium, and when the backwash air is horizontally diffused into the filter medium through the plurality of diffuse holes, simultaneously the backwash water and backwash air through another backwash air supply unit may be vertically supplied into the filter medium.
  • FIG. 1 shows the structure of a vertical backwash, continuous discharge type high-purity filter unit for filtering suspended matter in water according to the present invention
  • FIG. 2A is a plan view of an embodiment of a filter medium fixing flange having backwash air diffuse holes according to the present invention
  • FIG. 2B is a plan view of another embodiment of a filter medium fixing flange having backwash water diffuse holes according to the present invention
  • FIG. 2C is a longitudinal sectional view of a porous backwash air pipeline according to the present invention
  • FIG. 3 shows different arrangements of containment plates for preventing the efflux of entrapped particulates according to the prevent invention
  • FIGS. 3A, 3B, and 3C are sectional views of horizontal, inversed triangular, and triangular arrangements, respectively, of the containment plates in the filter unit of FIG. 1
  • FIGS. 3D, 3E, and 3F are sectional views of linear, inversed triangular, and triangular arrangements, respectively, of the containment plates in a filter unit 100' of FIG. 4;
  • FIG. 4 shows the structure of a horizontal backwash, continuous discharge type high-purity filter unit according to another embodiment of the present invention
  • FIG. 5 shows the entire structure of a filter apparatus according to the present invention including the vertical backwashing, continuous discharge type high-purity filter unit of FIG. 1 ;
  • FIG. 6 shows the entire structure of another filter apparatus according to the present invention including the horizontal backwashing, continuous discharge type high-purity filter unit of FIG. 4.
  • FIG. 1 shows the structure of a vertical backwash, continuous discharge type high-purity filter unit 100 for filtering suspended solids (liquid) in water, in which backwash water is vertically supplied, according to an embodiment of the present invention.
  • FIG. 4 shows the structure of a horizontal backwash, continuous concentrated filtrate (suspended solid concentrate) discharge type high-purity filter unit 100', in which backwash water is horizontally flowed, according to another embodiment of the present invention.
  • FIG. 2A is a plan view of an embodiment of a filter medium fixing flange having backwash air diffuse holes according to the present invention
  • FIG. 2B is a plan view of another embodiment of a filter medium fixing flange having backwash water diffuse holes
  • FIG. 3 shows different installations of containment plates for preventing the efflux of entrapped particulates according to the prevent invention
  • FIGS. 3A, 3B, and 3C are sectional views of horizontal, inversed triangular, and triangular arrangements, respectively, of the containment plates in the filter unit 100 of FIG. 1
  • FIGS. 3D, 3E, and 3F are sectional views of linear, inversed triangular, and triangular ' arrangements, respectively, of the containment plates in the filter unit 100' of FIG. 4.
  • FIG. 3 shows different installations of containment plates for preventing the efflux of entrapped particulates according to the prevent invention
  • FIGS. 3A, 3B, and 3C are sectional views of horizontal, inversed triangular, and triangular arrangements, respectively, of the containment plates in the filter unit 100 of FIG. 1
  • FIGS. 3D, 3E, and 3F are sectional views of linear, inversed triangular, and triangular ' arrangements, respectively, of the contain
  • FIG. 5 shows the entire structure of a filter apparatus according to the present invention including the vertical backwashing, continuous discharge type high-purity filter unit 100 of FIG. 1
  • FIG.' 6 shows the entire structure of another filter apparatus according to the present invention including the horizontal backwashing, continuous discharge type high-purity filter unit 100' of FIG. 4.
  • the embodiment of the vertical backwashing, continuous concentrated filtrate discharge type high-purity filter unit 100 utilizes flexible and elastic fibers having an appropriated surface roughness and thickness as a filter medium.
  • Suitable filter media include nylon fibers, activated carbon fiber, and fibers foamed with polypropylene (PP) or polyethylene (PE),
  • a backwash air supply pipeline 1 is disposed on the left of the filter unit 100, a source water supply pipeline 2 and a backwash water discharge pipeline 3 are disposed at the bottom left of the filter unit 100, and a backwash air supply pipeline 7 is disposed below the filter unit 100.
  • a backwash water discharge pipeline 4 is disposed on the right of the filter unit 100, and a continuous concentrated filtrate discharge pipeline 5 for continuously discharging concentrated filtrate of a relatively large particle size entrapped at the surface of the filter layer 88 during filtration is disposed at the bottom right of the filter unit 100.
  • a clarified water discharge pipeline 6 is disposed above the filter unit 100.
  • An automatic valve is attached to each of the supply and discharge pipelines.
  • flanges 15 capable of being opened and closed for filter medium exchange are coupled.
  • the left flange 15 includes the filter medium fixing flange 1 b having the backwash air diffuse holes 20, as shown in FIG.
  • FIG. 2A which guide backwash air in a horizontal direction, and can be coupled to a porous backwash air pipeline 1 d, as shown in FIG. 2C, which guides backwash air in a vertical direction.
  • the containment plates 1 1 , 12, or 13 are mounted, as shown in FIGS. 3A, 3B, and 3C, respectively, in the cylindrical member 50, separate from each other on the inner left and right wall of the cylindrical member 50, to prevent the efflux of entrapped particulates during filtration, through the boundary between the filter unit 100 and the filter medium installed therein.
  • a porous plate 14 for water diffusion and filter medium support and pressing is placed between the containment plates 11 , 12, or 13 to press the filter medium according to the hydraulic pressure of the source water supplied through the source water supply pipeline 2 to appropriately maintain the pore size and porosity of the filter medium, to appropriately diffuse the supplied source wafer along the length of the filter unit 100, and to discharge the concentrated filtrate entrapped at the bottom of the filter layer 8.
  • the porous plate 14 facilitates the discharge of the concentrated filtrate entrapped at the bottom of the filter layer 8 during filtration, through the continuous concentrated filtrate discharge pipeline 5.
  • FIG. 4 shows a horizontal backwash, continuous concentrated filtrate discharge type high-purity filter unit 100' according to another embodiment of the present invention, where during backwashing, backwash water is horizontally supplied through the backwash water supply pipeline 16 placed on the left of the filter unit 100', and backwash air is vertically supplied through the backwash air supply pipeline 7 placed below the filter unit 100'.
  • the filter unit 100' is identical to the filter unit 100 of FIG. 1 , except that in the filter unit 100' backwash water is horizontally supplied through the backwash water diffuse holes 21 of FIG. 2B from the backwash supply pipeline 16, backwash air is vertically supplied into the filter unit 100' through the backwash air supply pipeline 7 mounted below the filter unit 100', and the porous backwash air pipeline 1d of FIG.
  • the structure of the filter unit 100' is effective in separating the entrapped particulates from the filter layer 8 when the suspended solids are organic substances.
  • the containment plates 1 1 , 12, or 13 are mounted in the cylindrical member 50, separate from each other on the inner left and right wall of the cylindrical member 50, as shown in FIGS. 3A, 3B, and 3C, to prevent the efflux of entrapped particulates during filtration, through the boundary between the filter unit 100' and the filter medium installed therein.
  • the operations of the filter units 100 and 100' according to the present invention having the above structures will be described with reference to FIGS. 1 through 6.
  • the operation of a filter apparatus for filtering suspended matter in water, such as particulates, algae, etc., is divided into filtration and backwashing processes.
  • the vertical backwash, continuous concentrated filtrate discharge type high-purity filter unit 100 performs filtration as follows. Referring to FIGS. 1 and 5, a backwash water supply valve 3a, a backwash air supply valve 1a, a backwash water discharge valve 4a, and a backwash air supply valve 7a below the filter unit 100 are closed whereas a source water supply valve 2a, a clarified water discharge valve 6a, and a continuous concentrated filtrate discharge valve 5a are opened for filtration. In this state, as the source water is supplied into the filter unit 100 through the source water supply pipeline 2 by operating a source water supply pump 23, suspended matter in the source water is filtered through the filter layer 8, and the clarified water is discharged through the clarified water discharge pipeline 6.
  • continuous concentrated filtrate discharge type high-purity filter unit 100' When filtration is performed by the horizontal backwash, continuous concentrated filtrate discharge type high-purity filter unit 100' according to another embodiment of the present invention, which is capable of enhancing the effect of backwashing viscous suspended solids by horizontally supplying backwash water, referring to FIGS. 4 and 6, a backwash water supply valve 16a, a backwash air supply valve 7a below the filter unit 100', and a backwash water discharge valve 4a are closed whereas a source water supply valve 17a, a clarified water discharge valve 6a, and a continuous concentrated filtrate discharge valve 5a are closed.
  • the horizontal backwash filter unit 100' of FIG. 4 is identical to the vertical backwash filter unit 100, except for the way to supply backwash water and backwash air.
  • suspended matter in source water having a larger particle size than the pore size of the filter layer 8 are entrapped by the filter layer 8 during an upstream filtration process.
  • solids having a refatively large particle size, which have great transmission resistance to the filter layer 8 are accumulated on the lower portion of the filter layer 8, concentrated, and discharged from the filter units 100 and 100' through the continuous concentrated filtrate discharge pipeline 5 during filtration.
  • the filter units 100 and 100' according to the present invention are a varying • ' pore size filter apparatus where the porosity and pore size of the filter layer 8 are adjusted according to the kind, thickness, and density of the filter medium, the structure of the containment plates 11 , 12, or 13, and the hydraulic pressure of source water. Accordingly, the volume and quality of clarified water can be easily controlled according to the use of the clarified water.
  • the entire filter layer 8 is used as a space for entrapping particulates as if it has multiple filter layers so that the capability of the filter layer 8 to entrap particulates is enhanced through filtration for an extended duration. Accordingly, the frequency of backwashing is reduced. As the filtration is continued, the amount of suspended matter entrapped by the filter medium increases, filtration resistance increases, and filtration rate decreases. As a result, a small volume of clarified water is obtained.
  • the operation of the source water supply pump 23 is stopped, the source water supply valve 2a and the clarified water discharge valve 6a are closed, and the backwash air supply valve 1a on the left of the filter unit 100, the backwash water supply valve 3a, and the backwash water discharge valve 4a are opened.
  • a backwash air supply pump 24 and the backwash water supply pump 23 are operated for a predetermined period of time for backwashing.
  • the filter medium is strongly shaken over the predetermined period of time for backwashing.
  • the filter medium is shaken as a result of the vertical swelling of the filter medium.
  • the strength of the vertical swelling is the vector sum of the pressure of air horizontally supplied into the filter unit 100 through the backwash air diffuse holes 20 (FIG. 2A), the pressure of air vertically supplied into the filter unit 100 through the porous backwash air plate 1d (FIG. 2C) and the backwash air supply pipeline 7 below the filter unit 100, and the hydraulic pressure of backwash water vertically supplied into the filter unit 100 through the backwash water supply pipeline 3.
  • the entrapped particulates are easily separated from the filter medium within a short period of time by the resultant vector force, and simultaneously the backwash water used is concentrated and discharged through the backwash water discharge pipeline 4. After the suspended solids entrapped by the filter layer have been sufficiently removed, filtration is continued.
  • the operation of the source water supply pump 23 is stopped, the source water supply valve 17a and the clarified water discharge valve 6a are closed, and the backwash air supply valve 7a below the filter unit 100', the backwash water discharge valve 4a, and a backwash water supply valve 16a are opened.
  • the backwash water supply pump 23 and the backwash air supply pump 24 are operated for a predetermined period of time for backwashing.
  • the backwashing process by the horizontal backwash filter unit 100' of FIG. 4 is identical to that by the vertical backwash filter unit 100 of FIG. 1 except for the way to supply backwash water and backwash air.
  • the filter medium is strongly shaken due to its own vertical swelling by the vector sum of the hydraulic pressure of backwash water horizontally supplied into the filter unit 100' through the backwash water diffuse holes 21 (FIG. 2B) from the backwash supply pipeline 15 and the pressure of air horizontally supplied through the backwash air supply pipeline 7 below the filter unit 100'.
  • the entrapped particulates are easily separated from the filter layer 8 within a short period of time by the resultant vector force and continuously discharged through the backwash discharge pipeline 4.
  • filtration is continued.
  • valves and the operation of the source water supply pump 23 for filtration are controlled by a timing control program.
  • the opening and closing of valves and the operations of the backwash air supply pump 24 and the backwash water supply pump 23 are controlled by a sensor attached to the flow meter 10 or the pressure meter 9.
  • the filter units 100 and 100' according to the present invention have the following features.
  • the entire filter layer 8 is used as the space for entrapping particulates with the expectation of a multi-layer filtering effect.
  • the porosity and pore size of the filter medium are controlled according to the density of the filter medium and the hydraulic pressure of source water and determine the quantity and quality of clarified water.
  • the size of entrapped particulates to be filtered out is determined by the arrangement of the containment plates 1 1 , 12, or 13. In particular, assuming that the density of the filter medium and the hydraulic pressure of source water are constant, when the containment plates 1 1 are arranged horizontally in a line, as shown in FIGS.
  • the area of the filter layer 8 on which compression force by the hydraulic pressure of the source water acts is narrow, and a degree of consolidation of the filter layer 8 is increased, thereby minimizing the pore size and porosity of the filter layer 8.
  • filtration rate and the volume of clarified water are reduced, but high-purity clarified water can be obtained.
  • the containment plates 12 are arranged in an inverse triangular pattern, as shown in FIG. 3B, the area of the filter layer 8 which compression force by the hydraulic pressure of the source water acts on is enlarged, thereby increasing the porosity and pore size of the filter layer 8.
  • filtration rate and the volume of clarified water are increased, but the quality of the clarified water is poor than the case of the containment plates 11 shown in FIGS. 3A and 3D.
  • the containment plates 13 When the containment plates 13 are arranged in a triangular pattern, as shown in FIGS. 3C and 3F, the area of the filter layer 8 on which compression force by the hydraulic pressure of the source water acts, filtration rate, and the volume of clarified water are intermediate levels between those for the containment plates 11 and the containment plates 12.
  • the filter layer 8 are formed to a relatively great depth so that the filtration rate and the volume of clarified water are higher than the containment plates 11 of FIGS. 3A and 3D and are lower than the containment plates 12 of FIGS.' 3B and 3E.
  • the quality of the clarified water is better than from a filter unit with the containment plates 12, but slightly poor than from a filter unit with the containment plates 11.
  • the filter medium fixing flange 1b has radially distributed filter medium fixing holes 19 and backwash air diffuse holes 20, as shown in FIG. 2A, and the filter medium fixing flange 1b has radially distributed filter medium fixing holes 19 and backwash water diffuse holes 21 , as shown in FIG. 2B.
  • the sizes and numbers of filter medium fixing holes 19, backwash air diffuse holes 20, and backwash water diffuse holes 21 may be varied according to a target filtration rate, a target volume and quality of clarified water, filtration duration, the frequency of backwashing, and efficiency of backwashing.
  • the length and sectional area of the filter unit 100 or 100' may be increased, and the kind of fibers used for the filter medium, the density of the filter medium, and the structure of the containment plates 11 , 12, or 13 may be varied.
  • the filtration mechanism is identical, but the backwashing mechanism is different between the two filter units 100 and 100'. Another difference between the two filter units 100 and 100' is that the porous backwash air plate 1d of FIG. 2C is installed only in the filter unit 100 of FIG. 1.
  • the filter apparatus of FIG. 5 including the vertical backwash filter unit 100 of FIG. 1 , and the filter apparatus of FIG. 6 including the horizontal backwash filter unit 100' of FIG. 4 may be automatically or manually operated.
  • Biological wastewater of an average suspended matter concentration of 40 mg/L, 60 mg/L, 80 mg/L, and 100 mg/L were filtered for 6 months through the vertical backwash, continuous concentrated filtrate discharge type high-purity filter unit 100 of FIG. 1 having a diameter of 200 mm, a length of 1 ,500 mm and in which the containment plates 1 1 are arranged as shown in FIG. 3A.
  • a filter medium of the filter unit 100 was filled with flexible fibers to a density of about 0.7 g/cm 3 .
  • the duration of filtration refers to the duration from the start of filtration before the start of backwashing.
  • the amount of particulates entrapped by the filter layer 8 was about 5 kg on average for each filtration, and an average particle size of particulates remaining iii the clarified water was 3 urn.
  • a linear velocity of filtration was 20 m 3 /h on average regardless of the concentrations of suspended matter in the source water, and average filtration duration was 10 hours for the source water containing 40 mg/L suspended matter, 6.6 hours for the source water containing 60 mg/L suspended matter, 5 hours for the source water containing 80 mg/L suspended matter, and 4 hours for the source water containing 100 mg/L suspended matter.
  • the resultant clarified water less than 2 mg/L suspended solids on average, which is greater than for Example 1 , remained regardless of the concentrations of suspended matter in the source water.
  • the amount of particulates entrapped by the filter layer 8 was about 8 kg on average for each filtration, and an average particle size of particulates remaining in the clarified water was 10 ⁇ m.
  • Example 3 Filtration and backwashing were performed in the same conditions as in Example 1 , except that the containment plates 13 were arranged as shown in FIG. 3C.
  • a linear velocity of filtration was 15 m 3 /h on average regardless of the concentrations of suspended matter in the source water, and average filtration duration was 13.3 hours for the source water containing 40 mg/L suspended matter, 8.8 hours for the source water containing 60 mg/L suspended matter, 6.7 hours for the source water containing 80 mg/L suspended matter, and 5.3 hours for the source water containing 100 mg/L suspended matter.
  • the resultant clarified water less than 1 mg/L suspended solids on average, which is greater than for Example 1 , but lower than for Example 2, remained regardless of the concentrations of suspended matter in the source water.
  • the amount of particulates entrapped by the filter layer 8 was about 8 kg on average for each filtration, and an average particle size of particulates remaining in the clarified water was 5 ⁇ m.
  • Example 2 To investigate the effect of backwashing organic matter suspended in biological wastewater, filtration and backwashing were performed in the same conditions as in Example 1 , except that the horizontal backwash, continuous .concentrated filtrate discharge type high-purity filter unit 100' of FIG. 4 without the porous backwash air plate 1d was used, and backwashing was performed for 2 minutes with 0.5% backwash water.
  • the containment plates were arranged in three ways as shown in FIGS. 3D, 3E, and 3F. The results were similar to Examples 1 , 2, and 3, in terms of filtration duration, the concentration of particulates remaining in clarified water, and the amount of particulates entrapped by the filter layer 8 for each filtration.
  • the horizontal backwash, continuous concentrated filtrate discharge type high-purity filter unit 100' of FIG. 4 is believed to be effective in treating source water containing organic suspended matter.
  • a filter apparatus for filtering suspended matter in water has a small volume and can produce a large amount of high-purity clarified water which can be used as regular drinking water, even when its operational conditions, including a target volume of clarified water and the composition of source water, are varied. Since a variety of flexible filters having different thicknesses are available for its filter medium, durability of the filter medium is great, the manufacturing and maintenance costs are low, and headloss during filtration is small, compared to other filtration methods.
  • the pore size and porosity of the filter medium can be controlled according to the use of the clarified water, by varying the hydraulic pressure of source water, the density of the filter medium, and the position and shape of the containment plates. According to the ' present invention, depending on the kind of suspended matter in source water, different backwashing techniques can be applied, even when purifying a mixture of different kinds of suspended solids or liquid.
  • the filter apparatus utilizes a flexible filter medium capable of being swollen by compressed air supplied for backwashing, suspended matter entrapped by the filter layer can be removed within a short period of time using a minimum quantity of backwash water.
  • suspended matter of a relatively large particle size is entrapped near the surface of the filter layer and simultaneously discharged from the filter apparatus. Therefore, filtering can be performed for an extended period of time with reduced frequency of filtering.
  • the filter apparatus according to the present invention can filter out a variety of suspended particulates from water, for example, algae in fresh water or seawater, organic and inorganic matter suspended in swage or wastewater, and suspended matter in cooling water.
  • a filter apparatus according to the present invention can be applied as a solid and liquid separator of a sewage and wastewater treatment apparatus without a settling tank or with a minimum sized settling tank.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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  • Environmental & Geological Engineering (AREA)
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  • Filtration Of Liquid (AREA)

Abstract

L'invention concerne un appareil de filtrage destiné à filtrer une matière en suspension dans l'eau, telle que des particules organiques et inorganiques, des algues, etc., tout en concentrant et en évacuant de manière continue la matière en suspension piégée au voisinage de la surface d'une couche de filtrage. Dans cet appareil, le filtrage peut être réalisé pendant une durée prolongée, la matière en suspension piégée par la couche de filtrage pouvant être facilement éliminée au moyen d'un contre-courant d'air et/ou d'eau. Ledit appareil de filtrage comprend un milieu filtrant constitué de fibres souples de type fil et installé dans un élément cylindrique, ce milieu filtrant piégeant la matière en suspension contenue dans l'eau source acheminée dans cet élément cylindrique, un bord de fixation de milieu filtrant auquel une extrémité du milieu filtrant est fixée, ce bord comportant une pluralité d'orifices de diffusion destinés à une matière de contre-courant en vue d'un lavage à contre-courant du milieu filtrant, une unité d'évacuation d'eau clarifiée permettant d'évacuer l'eau clarifiée filtrée au moyen du milieu filtrant, une unité d'évacuation continue de filtrat concentré servant à évacuer la matière en suspension piégée par le milieu filtrant, ainsi qu'une unité d'évacuation d'eau de contre-courant destinée à évacuer l'eau de contre-courant.
PCT/KR2002/000445 2001-03-15 2002-03-14 Appareil de filtrage de solides en suspension dans l'eau WO2002076572A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002575081A JP2004524964A (ja) 2001-03-15 2002-03-14 水中浮遊物質濾過装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020010013448A KR100354836B1 (ko) 2001-03-15 2001-03-15 수중 부유물질 여과장치
KR2001/13448 2001-03-15

Publications (1)

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WO2002076572A1 true WO2002076572A1 (fr) 2002-10-03

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PCT/KR2002/000445 WO2002076572A1 (fr) 2001-03-15 2002-03-14 Appareil de filtrage de solides en suspension dans l'eau

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004050211A1 (fr) * 2002-12-03 2004-06-17 Sungshin Engineering Co.,Ltd Cartouche filtre a haute couche
EP2010303A1 (fr) * 2006-04-13 2009-01-07 Nanoentech Co., Ltd. Dispositif de filtrage fin comprenant un module de filtrage a fibres flexibles
ES2407130R1 (es) * 2011-07-14 2013-06-17 Micronet Porous Fibers S L Filtro de presion para el tratamiento de aguas
CN108892304A (zh) * 2018-08-01 2018-11-27 烟台冰镜智能科技有限公司 一种高效家用污水处理装置
CN110467330A (zh) * 2019-09-17 2019-11-19 重庆市农业科学院 一种循环水养鱼鱼粪污水浓缩装置及循环水养鱼粪污水浓缩回用系统
US11076716B2 (en) 2015-12-04 2021-08-03 Koninklijke Philips N.V. Filter assembly for use in a fluid container of a domestic appliance

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JP2015000383A (ja) * 2013-06-17 2015-01-05 株式会社東芝 ろ過器及びその洗浄方法
KR101631385B1 (ko) 2014-11-21 2016-06-24 (주) 에덴 펌프 가압수의 압착력에의한 하,폐수 방류수 내의 부유물질 여과장치
KR101662939B1 (ko) * 2015-01-28 2016-10-05 동부엔지니어링 주식회사 이동식 전처리 여과취수장치 및 이를 이용한 물 생산용 취수시스템

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JPH07289860A (ja) * 1994-04-25 1995-11-07 Toray Ind Inc 中空糸膜モジュールの洗浄方法
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JPH07289860A (ja) * 1994-04-25 1995-11-07 Toray Ind Inc 中空糸膜モジュールの洗浄方法
KR19980030358U (ko) * 1996-11-29 1998-08-17 양재신 자동차의 연료탱크 캡 미장착 경고장치
JPH10249114A (ja) * 1997-03-14 1998-09-22 Chofu Seisakusho Co Ltd ろ過器
JPH10323508A (ja) * 1997-05-27 1998-12-08 Japan Organo Co Ltd 長繊維束を用いたろ過塔
KR20000072266A (ko) * 2000-08-24 2000-12-05 강영배 공극 제어형 여과장치

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004050211A1 (fr) * 2002-12-03 2004-06-17 Sungshin Engineering Co.,Ltd Cartouche filtre a haute couche
EP2010303A1 (fr) * 2006-04-13 2009-01-07 Nanoentech Co., Ltd. Dispositif de filtrage fin comprenant un module de filtrage a fibres flexibles
EP2010303A4 (fr) * 2006-04-13 2011-06-29 Nanoentech Co Ltd Dispositif de filtrage fin comprenant un module de filtrage a fibres flexibles
ES2407130R1 (es) * 2011-07-14 2013-06-17 Micronet Porous Fibers S L Filtro de presion para el tratamiento de aguas
US11076716B2 (en) 2015-12-04 2021-08-03 Koninklijke Philips N.V. Filter assembly for use in a fluid container of a domestic appliance
CN108892304A (zh) * 2018-08-01 2018-11-27 烟台冰镜智能科技有限公司 一种高效家用污水处理装置
CN110467330A (zh) * 2019-09-17 2019-11-19 重庆市农业科学院 一种循环水养鱼鱼粪污水浓缩装置及循环水养鱼粪污水浓缩回用系统
CN110467330B (zh) * 2019-09-17 2023-10-27 重庆市农业科学院 一种循环水养鱼鱼粪污水浓缩装置及循环水养鱼粪污水浓缩回用系统

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KR100354836B1 (ko) 2002-10-05
KR20010044678A (ko) 2001-06-05

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