• 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 device for the continuous extrusion of liquid from a suspension, in particular screw press (1), with a rotor (4) rotating in a tubular screw housing (2) and carrying a screw conveyor (3), the screw housing (2 ) at least partially as with the screw conveyor (3) cooperating first filter jacket (5) is formed, the radial passages (6) for discharging the filtered liquid and a filter cake (K), from retained solids, in the conveying direction (7) the screw conveyor (7) a discharge (8) zuleitet. In order to provide advantageous filter conditions, it is proposed to arrange the rotor (4), downstream of the conveyor screw (3), an annular first sleeve (9) coaxially surrounding the rotor (4) for peeling an outer filter cake layer (10) from the filter cake ( K), wherein between sleeve (9) and rotor (4) a conveying channel (11) for the remaining inner filter cake layer (12) is provided and the rotor (4) in the region of the conveying channel (11) has a second filter (13) for draining the filtered liquid through the rotor (4).
    公开号:AT519379A1
    申请号:T51087/2016
    申请日:2016-11-30
    公开日:2018-06-15
    发明作者:Derflinger Sen Franz；Derflinger Jun Franz
    申请人:Derflinger Sen Franz；Derflinger Jun Franz；
    IPC主号:
    专利说明:

    Summary
    The invention relates to a device for continuously squeezing liquid from a suspension, in particular a screw press (1), with a rotor (4) driven in rotation and rotating in a tubular screw housing (2) and carrying a screw conveyor (3), the screw housing (2 ) is at least partially designed as a first filter jacket (5) cooperating with the screw conveyor (3), which has radial passages (6) for draining the filtered liquid and which has a filter cake (K) made of retained solids in the conveying direction (7) of the screw conveyor (7) a discharge (8). In order to create advantageous filter conditions, it is proposed to arrange an annular first sleeve (9) coaxially surrounding the rotor (4) and the screw conveyor (3) for peeling an outer filter cake layer (10) from the filter cake (K). A delivery channel (11) for the remaining inner filter cake layer (12) is provided between the sleeve (9) and the rotor (4) and the rotor (4) in the area of the delivery channel (11) has a second filter (13) for discharging it the filtered liquid through the rotor (4).
    (Fig. 1) / 14 (40958) HEL
    The invention relates to a device for continuously squeezing liquid from a suspension, in particular a screw press, with a rotatably driven rotor that rotates in a tubular screw housing and carries a screw conveyor, the screw housing comprising a first filter jacket that at least partially interacts with the screw conveyor and that is radial Has passages for draining the filtered liquid and which supplies a filter cake made of retained solids to a discharge in the conveying direction of the screw conveyor.
    Such devices, in particular screw presses, are used, for example, in wastewater treatment or purification in sewage treatment plants. Usually, a flocculant made of a polymer or the like is added to the sludge of the sewage treatment plant in order to cause the solids in the sludge to flocculate, so that the solid and the liquid phase of the sludge can be better separated. In addition, screw presses of this type are intended to ensure that the sewage sludge obtained has only the lowest possible liquid content. It should therefore be possible to separate the solid and liquid phases as effectively as possible. Such a screw press is disclosed, for example, in DE 60028187 T2. Such screw presses concentrate and dewater the sludge supplied by pressing and dewatering. The respective filter sizes depend on the sludge used or to be dried. Such screw presses can also be used for other purposes, such as inorganic sludges in industry.
    / 14
    Another such known device is shown, for example, in EP 549092 B1. This previously known filter for filtering water out of a fluid also includes, for example, a drum screen and a screw screw which rotates in the drum screen. The fluid is conveyed through the screen jacket in the conveying direction, solids being retained by the screen jacket and conveyed further in the conveying direction, whereas liquid, in particular water, is pressed out through the screen jacket. The fluid is squeezed out by compressing the retained substances in the conveying direction. After reaching a desired, predetermined residual moisture in the retained solid mass, it is removed from the screw press.
    A disadvantage of the known presses in particular is that the maximum achievable degree of dehumidification of the retained mass, in particular in the case of larger screw presses, is limited by the technology used, since the thickness (thickness) of the filter cake limits the maximum achievable degree of dehumidification.
    The object of the invention is to provide a device of the type described at the outset which, in particular also in the case of larger screw presses, can achieve an improved degree of dehumidification in the pressed filter cake.
    The invention achieves the stated object in that the rotor, which is arranged downstream of the screw conveyor, is assigned an annular first sleeve, coaxially surrounding the rotor, for peeling an outer filter cake layer from the filter cake, a conveying channel for the remaining inner filter cake layer being provided between the sleeve and the rotor, and the rotor in the region of the delivery channel has a second filter for discharging the filtered liquid through the rotor.
    According to the invention, the outer filter cake layer with the ring-shaped first sleeve, which is closer to the filter jacket and thus better pressed out or freed from moisture, is peeled off from the filter cake and discharged from the device via the discharge. The inner filter cake layer initially remains in the device, is driven by the pressure of the screw conveyor and is conveyed and introduced into the conveying channel for the remaining inner filter cake layer between the first sleeve and with pressure, where this inner filter cake layer is provided in this area of this conveying channel second filter is further drained. Liquid extracted from the filter cake is pressed through the second filter, into the interior of the rotor, and subsequently discharged from the device via a corresponding discharge line.
    This can significantly improve the degree of dehumidification of the filter cake. The inner filter cake layer, which is reduced in this way with regard to its residual moisture, is subsequently derived again from the device via the discharge.
    Although the second filter is also cleaned from the filter cake pressed past, it is recommended, in order to achieve an improved filter effect, that at least one scraper positioned against the rotor is assigned to the first sleeve for cleaning the filter cake from the second filter. This scraper is fastened to the first sleeve in the conveying channel and projects radially from the sleeve against the second filter. The scraper is preferably aligned parallel to the rotor axis with its scraper blade sliding on the second filter. If necessary, the cross section of the conveying channel could narrow in the conveying direction, ie be conical in order to increase the conveying pressure in the conveying direction for improved squeezing out of the liquid.
    In order to be able to advantageously set the counterpressure or the peeling behavior of the annular first sleeve with respect to the filter cake, it is advantageous if the first sleeve can be displaced with a drive parallel to the rotor axis.
    On the run-up side, the first sleeve can have at least one cone, which ensures a clean cut between the inner and outer filter cake layer. In order to be able to advantageously set the counterpressure for the inner filter cake remaining in the conveying channel for the purpose of setting the degree of drying, it is proposed that the first sleeve be displaceable with a drive in the direction of the rotor axis, smaller in inner diameter, and encompassing the rotor with play, second Sleeve is subordinate. This sleeve narrows or widens the / 14
    Output gap for the filter cake between the first and second sleeve and thus allows a corresponding back pressure setting. If the second sleeve is equipped on the start side with a cone which lifts the filter cake radially from the rotor, the remaining filter cake is also lifted off the second filter and fed to the discharge.
    In order to be able to advantageously clean the second filter, it is proposed that a washing lance with cleaning nozzles, which are directed against the second filter, be arranged within the rotor between the second filter and the rotor axis. These washing nozzles ensure that material that lays filter openings or filter bores can be lifted from the inside with counter pressure from the filter surface and can advantageously be scraped off with a scraper.
    The second filter can comprise a fine screen mounted on a filter holder, a filter cloth or a filter made of porous filter materials, such as plastic or ceramic. The appropriate choice naturally depends on the fluid to be filtered.
    The subject matter of the invention is shown in the drawing, for example. Show it
    1 shows a device according to the invention in a partially sectioned cross section, and FIG. 2 shows the left section of the device from FIG. 1 in the area of the second filter on an enlarged scale.
    A device for continuously squeezing liquid out of a suspension, namely a screw press 1, comprises a rotatably driven rotor 4, which rotates in a tubular screw housing 2 and carries a conveyor screw 3. The screw housing 2 comprises a first filter jacket 5, which at least partially interacts with the conveyor screw 3, which has radial passages 6 for discharging the filtered liquid and which supplies a filter cake K, made of retained solids, to a discharge 8 in the conveying direction 7 of the screw conveyor 3.
    / 14
    A fluid to be filtered is introduced into the space between the conical screw conveyor 3 and the first filter jacket 5 and is conveyed by the screw conveyor, which is driven about the rotor axis R, in the conveying direction 7 while squeezing the fluid, the filter cake retained by the first filter jacket 5 forming the filter cake Solids are conveyed in the conveying direction 7 to the discharge 8 and fluid passing through the passages 6 of the first filter jacket is discharged from the device via the outlet F. Instead of the conical screw conveyor 3, a cylindrical screw conveyor with different pitch could also be used. Combinations of these are also conceivable. In addition, the worm can be single-thread or (partially) multi-thread.
    According to the invention, an annular first sleeve 9 coaxially surrounding the rotor 4 for peeling an outer filter cake layer 10 from the filter cake K is assigned to the rotor 4, which is arranged downstream of the screw conveyor 3, with a conveying channel 11 for the inner filter cake layer 12 between the sleeve 9 and the rotor 4 is provided and the rotor 4 has a second filter 13 in the region of the delivery channel 11 for discharging the filtered liquid through the rotor 4.
    The first sleeve 9 has at least one scraper 14 positioned against the rotor 4 for cleaning the filter cake 12 from the second filter 13. The first sleeve 9 can be displaced with a drive 15, an indicated hydraulic drive, parallel to the rotor axis, and is equipped with at least one cone 16 on the run-up side.
    In addition, the first sleeve 9 is followed by a second sleeve 18 with a drive 17, also an indicated hydraulic drive, displaceable in the direction of the rotor axis R, smaller in terms of the inner diameter compared to the first sleeve 9, and encompassing the rotor with play , the filter cake has the cone 19 lifting radially from the rotor 4.
    In addition, a washing lance 20 with cleaning nozzles 21, which are directed against the second filter 13, is arranged within the rotor 4, between the second filter 13 and the rotor axis R. The second filter 13 can comprise a fine sieve mounted on a sieve carrier / 14, a filter cloth or a filter made of porous filter materials, such as plastic or ceramic. Liquid discharged by the rotor 4 is discharged from the device via a discharge 23.
    / 14
    patent attorneys
    Dipl.-Ing. Helmut Hübscher
    Dipl.-Ing. Karl Winfried Hellmich
    Spittelwiese 4, 4020 Linz (40958) HEL
    权利要求:
    Claims (9)
    [1]
    claims
    1. Device for the continuous squeezing of liquid from a suspension, in particular screw press (1), with a rotatably driven rotor (4) which rotates in a tubular screw housing (2) and carries a screw conveyor (3), the screw housing (2) at least one partially cooperating with the screw conveyor (3) comprises the first filter jacket (5), which has radial passages (6) for draining the filtered liquid and which has a filter cake (K) made of retained solids in the conveying direction (7) of the screw conveyor (3) Discharge (8) leads, characterized in that the rotor (4), downstream of the screw conveyor (3), has an annular first sleeve (9) coaxially surrounding the rotor (4) for peeling off an outer filter cake layer (10) from the filter cake (K ) is assigned, with a conveyor channel (11) for the remaining inner filter cake layer (12) being provided between the sleeve (9) and the rotor (4) and the rotor (4) has a second filter (13) in the region of the delivery channel (11) for discharging the filtered liquid through the rotor (4).
    [2]
    2. Device according to claim 1, characterized in that the first sleeve (9) has at least one scraper (14) placed against the rotor (4) for cleaning the filter cake (12) from the second filter (13).
    [3]
    3. Device according to claim 1 or 2, characterized in that the first sleeve (9) with a drive (15) is displaceable parallel to the rotor axis.
    [4]
    4. Device according to one of claims 1 to 3, characterized in that the first sleeve (9) has at least one cone (16) on the run-up side.
    8/14
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the first sleeve (9) with a drive (17) in the direction of the rotor axis (R) displaceable, the inside diameter smaller, and the rotor (4) with play comprehensive, second sleeve (18) is arranged downstream.
    [6]
    6. The device according to claim 5, characterized in that the second sleeve (18) on the run-up side has a filter cake (12) lifting radially from the rotor (4), cone (19).
    [7]
    7. The device according to claim 3 to 6, characterized in that the first sleeve (9) and the second sleeve (18) can be moved parallel to the rotor axis with a common drive.
    [8]
    8. Device according to one of claims 1 to 7, characterized in that within the rotor (4), between the second filter (13) and the rotor axis (R), a washing lance (20) with cleaning nozzles (21) is arranged, the are directed against the second filter (13).
    [9]
    9. The device according to claim 7, characterized in that the second filter (13) comprises a fine screen drawn onto a screen support (22), a filter cloth or a filter made of porous filter materials, such as plastics or ceramics.
    9/14
    类似技术:
    公开号 | 公开日 | 专利标题
    DE2422208C3|1984-08-09|Method and device for dewatering sludge-like goods
    WO1993023238A1|1993-11-25|Screw press
    DE3043194A1|1982-07-01|DEVICE FOR MECHANICALLY SEPARATING LIQUIDS FROM LIQUIDS-SOLIDS MIXTURES IN A SCREW PRESS
    WO1988003048A1|1988-05-05|Process and installation for dewatering waste water sludge
    EP1468744A1|2004-10-20|Pusher centrifuge with rotatable cone for pre-accelerating the mixture
    DE2923646A1|1979-12-20|SCREW PRESS
    DE3046969C2|1983-01-27|Device for the continuous extraction of liquid from flowing suspensions, in particular pulp
    AT413497B|2006-03-15|DEVICE FOR CONTINUOUSLY FILTERING FLOWABLE MASSES CONTAINING SOLID PARTICLES
    EP0577854A1|1994-01-12|Filter device
    AT519379B1|2020-02-15|Device for the continuous squeezing of liquid from a suspension
    EP1013614B1|2003-05-21|Dewatering of fermentation products with screw press
    DE3600492C2|1988-01-21|
    EP1468743A1|2004-10-20|Pusher centrifuge
    DE102018113135A1|2019-12-05|Device for sewage sludge dewatering
    AT16471U1|2019-10-15|screw Press
    EP0736370A2|1996-10-09|Apparatus for dewatering materials
    WO2002011853A1|2002-02-14|Separating device for separating fluids from solids and use thereof
    DE19706803C2|2000-03-02|Device for using a large grinder for mechanical dry extraction and shredding of organic raw materials
    DE2434943A1|1975-02-13|DEVICE FOR REMOVING LIQUID FROM A SUSPENSION
    EP2729228B1|2018-12-26|Method to separate particles and liquids from a slurry
    DE3615411C2|1989-07-06|
    AT515250B1|2016-06-15|Screw press for dewatering wet material
    DE2438165A1|1976-02-19|Sludge dewatering unit - with drainage sieve belt and press zone sieve belts for use in effluent treatment plants
    DE1502229A1|1969-03-13|Device for the mechanical separation of liquids from liquid-solid mixtures in a screw press
    EP1080872B1|2003-08-06|Process for mechanically dehydrating, in particular, beet chips
    同族专利:
    公开号 | 公开日
    US20190375178A1|2019-12-12|
    EP3548267A1|2019-10-09|
    WO2018098512A1|2018-06-07|
    AT519379B1|2020-02-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1299524A|1918-04-18|1919-04-08|Larrowe Construction Company|Pulp-press.|
    US1838996A|1928-02-15|1931-12-29|American Voith Contact Co|Screw press for dewatering and washing diluted substances|
    AT412857B|2002-07-19|2005-08-25|Andritz Ag Maschf|SCREW PRESSURE FOR REMOVING LIQUID FROM SOLID-LIQUID MIXTURES, ESPECIALLY FIBER-SUSPENSIONS|
    US1851191A|1927-02-11|1932-03-29|American Voith Contact Co|Pulp screw press|
    JPH04157095A|1990-10-15|1992-05-29|Ishigaki Mech Ind Co|Screw press|
    JPH0698515B2|1990-11-29|1994-12-07|石垣機工株式会社|Screw press operating method and device|
    AT398090B|1992-05-15|1994-09-26|Andritz Patentverwaltung|DEVICE FOR SEPARATING LIQUID FROM SOLIDS-LIQUID MIXTURES WITH A SOLIDS RETENTION DEVICE AND DEVICE IN THE FORM OF A SCREW PRESS|
    JP2544706B2|1994-03-25|1996-10-16|富国工業株式会社|Continuous press|
    EP1586439B1|2004-04-15|2016-07-27|Andritz AG|screw press for extracting liquids from solid/liquid mixtures, in particular fiber suspensions|CN110065257B|2019-04-19|2021-07-20|广西长寿奥秘科技有限公司|Squeezing device for processing edible oil and facilitating adjustment of squeezing interlayer|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA51087/2016A|AT519379B1|2016-11-30|2016-11-30|Device for the continuous squeezing of liquid from a suspension|ATA51087/2016A| AT519379B1|2016-11-30|2016-11-30|Device for the continuous squeezing of liquid from a suspension|
    EP17790936.3A| EP3548267A1|2016-11-30|2017-10-02|Apparatus for continuously expressing liquid from a suspension|
    US16/464,445| US20190375178A1|2016-11-30|2017-10-02|Device for continuously pressing liquid out of a suspension|
    PCT/AT2017/050025| WO2018098512A1|2016-11-30|2017-10-02|Apparatus for continuously expressing liquid from a suspension|
    [返回顶部]