WO1993023239A1 - Vorrichtung zum abtrennen von flüssigkeit aus feststoff-flüssigkeitsmischungen - Google Patents
Vorrichtung zum abtrennen von flüssigkeit aus feststoff-flüssigkeitsmischungen Download PDFInfo
- Publication number
- WO1993023239A1 WO1993023239A1 PCT/AT1993/000083 AT9300083W WO9323239A1 WO 1993023239 A1 WO1993023239 A1 WO 1993023239A1 AT 9300083 W AT9300083 W AT 9300083W WO 9323239 A1 WO9323239 A1 WO 9323239A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- support body
- sieve
- passages
- liquid
- screw press
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
- B30B9/121—Screw constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
- B30B9/18—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing with means for adjusting the outlet for the solid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/26—Permeable casings or strainers
Definitions
- the invention relates to a device for separating liquid from, in particular pressurized solid-liquid mixtures, in particular fiber suspensions, with a solid retention device provided with liquid passages, which consists of a sieve and a support body for the sieve, and a device in the form of a screw press .
- perforated sheets are mostly used as sieves. These are fastened on a support device, the support device having countersunk holes, into each of which several holes of the sieve open.
- the holes in the support device are blocked by the fibers and thus the drainage performance of the device is greatly reduced.
- the invention is primarily characterized in that the solids retention device is constructed in several layers, the layer facing the solid-liquid mixture being designed as a sieve with passages and the layer facing away from the solid-liquid mixture being designed as a support body with slot-shaped passages.
- the slot-shaped passages of the support body are aligned parallel to one another, evenly distributed over its surface and preferably arranged in rows offset from one another.
- the cross section of the passages of the support body in the outflow direction of the liquid is increasingly formed. This largely prevents the passage from becoming blocked by fibers.
- the free space is expediently provided in the form of channels between the sieve and the support body. Effective cleaning from the outside is only made possible by the formation of channels between the sieve and the support body.
- water is introduced into a slit-shaped passage with a flat jet nozzle, pressed through the channels and pushed out again through the next slots.
- the channels are advantageously formed by spacers, in particular strips, arranged between the sieve and the support body.
- the channels are formed by grooves arranged in the sieve. In this way, the overall height of the device can be reduced.
- the channels are arranged at least substantially transversely with respect to the trough-shaped passages of the support body. In this way, optimal drainage of the liquid is achieved, whereby a high drainage performance can be achieved with the device.
- channels are advantageously provided in the edge region of the support body in the form of grooves arranged in the support body, which run in the longitudinal direction of the passages following them.
- the passages of the sieve increase in the outflow direction of the liquid Cross section on. It is advantageous if the passages are aligned at right angles to the screen surface.
- holes are expediently provided as passages in the sieve.
- slots are provided as passages in the sieve.
- the slot-shaped passages in the support body are expediently arranged at right angles to a surface of the support body.
- the longitudinal direction of the slots in the sieve is advantageously oriented at right angles to the longitudinal direction of the slot-shaped passages in the support body.
- the solid retention device is designed as a hollow cylinder or a hollow truncated cone. It can be advantageous if the slot-shaped passages in the support body are aligned perpendicular to the generatrix of the hollow cylinder or hollow truncated cone. Alternatively, it can also be advantageous if the slot-shaped passages in the support body are oriented approximately in the direction of the generatrix of the hollow cylinder or hollow truncated cone.
- the passages in the sieve open into grooves in the sieve or are connected to one another by grooves, these grooves being arranged on the side of the sieve facing the support body and running expediently transverse to the slot-shaped passages of the support body and preferably approximately in the direction of the generatrix.
- This configuration enables liquid to be passed on if a passage of the sieve is arranged over a closed region of the support body and rests directly on the latter.
- the liquid is passed on by means of grooves on the surface of the support body to the nearest slot-shaped passage in the support body and can thus drain off.
- the solid retention device is planar.
- the invention also relates to a device according to the present invention in the form of a screw press.
- the device in the form of a screw press is primarily characterized in that the at least one screw of the screw press is surrounded by the solid retention device designed as a cylinder or cone jacket.
- the device according to the invention is advantageously used particularly in the dewatering of fiber-containing suspensions which are introduced into the housing and are subjected to a corresponding pressure by the screw.
- the cylinder or cone jacket is expediently made up of several parts, in particular it consists of a plurality of cylinder or cone and cone-butt jackets arranged next to one another.
- a sieve is provided for drainage inwards into the cavity.
- the screw of the screw press is expediently arranged on the outer casing of a hollow drum and has the hollow one Drum in the end of the material feed in the screw press on a screen cylinder section.
- This sieve is constructed analogously to the sieve of the device, i.e. in particular, it has passages whose cross section widens towards the interior (in the direction of the axis).
- the passages of the screen cylinder section of the screw press advantageously have a cross section which increases in the outflow direction of the liquid in the direction of the axis of the drum.
- the hollow drum in the screw press is designed to be tapered in the end region, the drum cone jacket being surrounded by the screen cylinder section or by an adjoining cylinder jacket.
- an overflow for liquid is advantageously provided at the end of the channels in the screw press.
- flushing devices preferably spray nozzles, are expediently provided at the end of the channels for cleaning the channels, in particular of entrained fibers.
- FIG. 1 shows a longitudinal section through a device according to the invention
- FIG. 2 shows an enlarged illustration of detail X from FIG. 1
- FIG. 3 shows a top view of the support device
- FIG. 3a shows a top view of the support device with a sieve underneath
- FIG. 4a shows a cross-sectional segment of a circularly curved device in the region of a fastening flange
- FIG. 4b shows a variant of FIG. 4a
- FIG. 1 shows a longitudinal section through a device according to the invention
- FIG. 2 shows an enlarged illustration of detail X from FIG. 1
- FIG. 3 shows a top view of the support device
- FIG. 3a shows a top view of the support device with a sieve underneath
- FIG. 4a shows a cross-sectional segment of a circularly curved device in the region of a fastening flange
- FIG. 4b shows a variant of FIG. 4a
- FIG. 5a shows a cross section of a sieve with bores and grooves
- FIG 6 shows a variant of FIG. 4a, b using spacers for the channels
- FIG. 7 shows a longitudinal section through a screw press according to the invention
- FIG. 8 shows a longitudinal section in the end area of the screw press
- FIG. 9 shows a cross-sectional segment in the end area of the screw press.
- 1 is the space in which the fiber suspension to be dewatered is under pressure
- 2 is the space into which the water of the fiber suspension is pressed
- 3 is the sieve required for dewatering
- 4 is the associated support body
- 5 denotes the passages of the support body 4
- 6 the channels between the sieve 3 and support body 4
- 7 the passages in the sieve 3.
- FIG. 1 shows a device according to the invention, with the aid of which water is transferred from a fibrous material suspension to be dewatered in the room 1 in the direction of the arrow 8 into the room 2 and derived therefrom.
- the solids, in particular fibers, are retained on the sieve 3, the liquid, primarily water, passing through the Durentritte 7.
- the liquid is distributed by Durcngang through the passages 7 of the screen 3 in the located between the screen 3 and the St 'auerkö "mer 4 channels 6 and passes on in the passages 4 suitable configuration for the support body in the space 2.
- FIG. 2 shows an enlarged representation of detail X from FIG. 1, which further clarifies the structure of the device according to the invention.
- Fig. 3 shows a plan view of the support body 4 from the direction of the room 2, i.e. opposite to the direction of flow of the liquid, the shape of the passages 5 and their arrangement in the support body 4 can be seen.
- the double contour of the passages 5 is due to the change in cross section of the passages 5.
- 3a shows a plan view of the support body 4 including the sieve 3 arranged underneath. This figure shows how the liquid from the passages 7 in the sieve 3 reaches the passages 5 of the support body 4 by means of channels 6.
- FIGS. 4a and 4b show further advantageous configurations of a device according to the invention which is circularly curved.
- the flange required to fasten the device to a housing or other devices to one another conceals a series of openings, as a result of which the drainage capacity is reduced. Due to the configuration according to the invention, the liquid can now also pass through the passages 7 of the sieve 3 into the channels 6 ′ formed as grooves and from there through the through the passages 7 of the sieve 3
- 5a shows an advantageous embodiment of the sieve 3, the passages 7 of the sieve 3 on the side facing the solid-liquid mixture being designed as bores, each on the side of the sieve 3 facing the support body 4 in grooves 6
- the liquid from the solid-liquid mixture passes through passages 7 in sieve 3 (as indicated by arrow 10) to the support body (not shown). If a passage 7 of sieve 3 passes over a closed area of the support body 4 and lies directly on it, the liquid can be passed through the grooves 6 "in the sieve 3 on the surface of the support body 4 to the nearest slot-shaped passage 5 in the support body 4. In this way, the outflow of liquid from the passage 7 of the sieve 3 is ensured.
- FIG. 5b shows a top view of a unwound sieve 3 for a circularly curved device for separating liquid from solid-liquid mixtures.
- the passages 7, which have grooves 6 ′′, are each arranged at the same distance in a row, the passages 7 being offset from one another by half the distance of the passages 7 in adjacent rows.
- FIG. 6 shows an advantageous embodiment of the channels 6 by means of spacers 6a. This is particularly useful in the case of large amounts of water or special substances to be dewatered.
- FIG. 7 A screw press according to the present invention is shown in FIG. 7.
- the pulp suspension to be dewatered is introduced into the screw chamber via the inlet nozzle 11.
- This chamber consists of a number of lined-up, circularly curved sieves 3 and supporting bodies 4, which form the cylinder jacket, and the screw 14 is fastened on a hollow drum 13.
- roller stubs 15 are mounted, with which the drum 13 (including the screw 14) is rotatably mounted in bearings 16.
- the dewatered material is finally discharged from the screw press through a shaft 12.
- the drum 13 has a drum jacket 17 which tapers conically.
- the drum jacket 17, the partition walls 19 and the cylinder jacket 22 and the screen cylinder section 3 1 together form channels 23 for discharging the liquid.
- the liquid is discharged from the screw press via an overflow 18.
- rinsing devices 20 e.g. Spray nozzles, provided. This means that the ducts can also be cleaned during operation.
- Previously known designs of screw presses often had to be turned off for cleaning purposes and sometimes also dismantled.
- Screw press shown in longitudinal section. Partitions 19, 19 'aligned parallel to the longitudinal axis and arranged in axial planes and fastened to the cylinder jacket 22 extend up to or almost as far as the drum jacket 17 of the drum 13, which tapers conically in this region. Drum jacket 17, partition walls 19 and cylinder jacket 22 or Screen cylinder section 3 'form channels 23, from which the liquid is removed from the screw press while separating solid matter as it passes in the outflow direction 8' through the screen cylinder section 3 '. With the controllable flap 21, pressure can be exerted on the fiber suspension to be dewatered.
- FIG. 9 shows a cross-sectional segment of the end region of the screw press with the individual channels 23, which are formed by the drum jacket 17, the partition walls 19 and 19 'and the cylinder jacket 22.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtration Of Liquid (AREA)
- Paper (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Sludge (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Centrifugal Separators (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4392040A DE4392040C1 (de) | 1992-05-15 | 1993-05-14 | Vorrichtung zum Abtrennen von Flüssigkeiten aus Faserstoffsuspensionen sowie Verwendung der Vorrichtung |
US08/335,859 US5566611A (en) | 1992-05-15 | 1993-05-14 | Apparatus for separating liquid from fibrous suspensions |
DE4392040D DE4392040D2 (de) | 1992-05-15 | 1993-05-14 | Vorrichtung zum Abtrennen von Flüssigkeit aus Feststoff-Flüssigkeitsmischungen |
SE9403808A SE509835C2 (sv) | 1992-05-15 | 1994-11-07 | Anordning för avskiljning av vätska ur fibersuspensioner |
FI945316A FI105898B (fi) | 1992-05-15 | 1994-11-11 | Laite nesteen erottamiseksi kuitususpensioista |
NO19944333A NO310678B1 (no) | 1992-05-15 | 1994-11-14 | Innretning for utskillelse av v¶ske, spesielt fra en faststoff/v¶skeblanding |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0099692A AT398090B (de) | 1992-05-15 | 1992-05-15 | Vorrichtung zum abtrennen von flüssigkeit aus feststoff-flüssigkeit-mischungen mit einer feststoffrückhalteeinrichtung sowie vorrichtung in form einer schneckenpresse |
ATA996/92 | 1992-05-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993023239A1 true WO1993023239A1 (de) | 1993-11-25 |
Family
ID=3504548
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT1993/000084 WO1993023238A1 (de) | 1992-05-15 | 1993-05-14 | Schneckenpresse |
PCT/AT1993/000083 WO1993023239A1 (de) | 1992-05-15 | 1993-05-14 | Vorrichtung zum abtrennen von flüssigkeit aus feststoff-flüssigkeitsmischungen |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT1993/000084 WO1993023238A1 (de) | 1992-05-15 | 1993-05-14 | Schneckenpresse |
Country Status (10)
Country | Link |
---|---|
US (2) | US5515776A (de) |
JP (2) | JP2637289B2 (de) |
AT (1) | AT398090B (de) |
AU (2) | AU4049793A (de) |
CA (2) | CA2135757C (de) |
DE (4) | DE4392040D2 (de) |
FI (2) | FI105538B (de) |
NO (2) | NO310678B1 (de) |
SE (2) | SE509835C2 (de) |
WO (2) | WO1993023238A1 (de) |
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SE9500526D0 (sv) * | 1995-02-14 | 1995-02-14 | Tetra Laval Holdings & Finance | Anordning för förtjockning av massa |
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AT411451B (de) * | 2001-11-08 | 2004-01-26 | Andritz Ag Maschf | Schneckenpresse zum abtrennen von flüssigkeiten aus feststoff-flüssigkeits-mischungen |
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- 1992-05-15 AT AT0099692A patent/AT398090B/de not_active IP Right Cessation
-
1993
- 1993-05-14 CA CA002135757A patent/CA2135757C/en not_active Expired - Lifetime
- 1993-05-14 AU AU40497/93A patent/AU4049793A/en not_active Abandoned
- 1993-05-14 AU AU40498/93A patent/AU4049893A/en not_active Abandoned
- 1993-05-14 CA CA002135756A patent/CA2135756C/en not_active Expired - Lifetime
- 1993-05-14 US US08/335,856 patent/US5515776A/en not_active Expired - Lifetime
- 1993-05-14 US US08/335,859 patent/US5566611A/en not_active Expired - Lifetime
- 1993-05-14 WO PCT/AT1993/000084 patent/WO1993023238A1/de active IP Right Grant
- 1993-05-14 DE DE4392040D patent/DE4392040D2/de not_active Expired - Lifetime
- 1993-05-14 JP JP5519695A patent/JP2637289B2/ja not_active Expired - Fee Related
- 1993-05-14 JP JP5519694A patent/JP2624895B2/ja not_active Expired - Fee Related
- 1993-05-14 DE DE4392041D patent/DE4392041D2/de not_active Expired - Lifetime
- 1993-05-14 DE DE4392041A patent/DE4392041C1/de not_active Expired - Lifetime
- 1993-05-14 WO PCT/AT1993/000083 patent/WO1993023239A1/de active IP Right Grant
- 1993-05-14 DE DE4392040A patent/DE4392040C1/de not_active Expired - Lifetime
-
1994
- 1994-11-07 SE SE9403808A patent/SE509835C2/sv unknown
- 1994-11-07 SE SE9403809A patent/SE509642C2/sv unknown
- 1994-11-11 FI FI945317A patent/FI105538B/fi not_active IP Right Cessation
- 1994-11-11 FI FI945316A patent/FI105898B/fi not_active IP Right Cessation
- 1994-11-14 NO NO19944333A patent/NO310678B1/no not_active IP Right Cessation
- 1994-11-14 NO NO944334A patent/NO307992B1/no not_active IP Right Cessation
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