EP2707206A1 - Press screw separator - Google Patents
Press screw separatorInfo
- Publication number
- EP2707206A1 EP2707206A1 EP12709532.1A EP12709532A EP2707206A1 EP 2707206 A1 EP2707206 A1 EP 2707206A1 EP 12709532 A EP12709532 A EP 12709532A EP 2707206 A1 EP2707206 A1 EP 2707206A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw
- press
- separator
- screen basket
- press screw
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
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
- B30B9/26—Permeable casings or strainers
-
- 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
- B30B9/128—Vertical or inclined screw presses
Definitions
- the invention relates to a press screw separator for the separation of solid components from a slurry containing solid and liquid components, such as waste water from municipal, industrial or agricultural enterprises, manure, etc., with a substantially cylindrical screw arrangement with at least one screw spiral, a substantially cylindrical surrounding the screw arrangement Sieve basket, formed between the inside of the screen basket and the screw assembly annulus, a feed for the pulp, a clear flow for the aqueous components of the pulp, a solids outlet for the solid components of the pulp, and a drive.
- a press screw separator for the separation of solid components from a slurry containing solid and liquid components, such as waste water from municipal, industrial or agricultural enterprises, manure, etc.
- Such a press screw separator is known, for example, from WO 2008/145 079 A1.
- the screw arrangement is driven, while the screen basket - at least during operation - is fixed. Since the outside of the screen basket must be cleaned at regular intervals, wash nozzles are provided. During cleaning, however, the washing nozzles are not moved around the screen basket, but the screen basket is rotated past the washing nozzles. This requires an increased expenditure on equipment, since in operation the screw arrangement must be driven and at the same time care must be taken for the purpose of cleaning for a rotation of the screen basket.
- a slurry containing solid and liquid components for separation of solid constituents such as effluents from municipal, industrial or agricultural operations, liquid manure, etc.
- a substantially cylindrical screw arrangement with at least one spiral screw essentially surrounding the screw arrangement cylindrical screen basket, an annular space formed between the inside of the screen basket and the screw arrangement, a feed for the pulp, a clear flow for the aqueous components of the pulp, a solids outlet for the solid components of the pulp, and a drive achieved in that the drive the screen basket drives and turns around the fixed screw arrangement.
- the clear-run is also called the process.
- the strainer basket preferably a bar screen or a perforated screen is used.
- the drive is arranged on an end region of the screen basket. This simplifies the overall structure of the press screw separator and also facilitates maintenance work on the drive. In addition, no seal is required by the overhead drive, which must seal the liquid-filled product space against the drive or the transmission.
- the drive can advantageously be designed so that at the end region of the screen basket, a sprocket is arranged, which meshes with a pinion of the drive.
- the drive can drive the screen basket via a belt or chain drive.
- the drive comprises a reduction gear in order to adjust the rotational speed of the output shaft of the drive to a suitable level in predetermined stages or continuously.
- the screw arrangement and thus also the entire press screw separator is vertically aligned. This creates a material promotion against the gravitational effect and contributes to an improved drainage of the pulp.
- the drive is advantageously arranged at the upper edge of the screen basket, whereby it is easily accessible, for example, for maintenance and repair work.
- the screw arrangement and thus the entire press screw separator can also be aligned horizontally.
- a tilted to a vertical orientation is also conceivable.
- the solids outlet is arranged in the interior of the screw arrangement formed as a hollow cylinder and designed as a funnel. This allows in the simplest way the discharge of the solid from the press screw separator according to the invention.
- the feed for the slurry is advantageously aligned tangentially to the press screw separator. This creates a particularly streamlined entry of the pulp in the press screw separator.
- the clear flow for the aqueous components of the pulp is advantageously aligned radially to the press screw separator in order to ensure a streamlined flow of the aqueous constituents.
- the press screw separator has a cup-shaped base part.
- the press screw separator is advantageously provided with a discharge regulator.
- the ejection controller preferably consists of at least one press cylinder.
- the discharge regulator may also have at least one weight.
- washing nozzles are arranged. These are advantageously arranged substantially in a row and extend substantially over the entire length of the screen basket.
- a seal is provided between the screw arrangement and the screen basket, which can be pressed hydraulically or pneumatically on the screen basket.
- This has the advantage over a permanently pressed seal that wear of the seal in the operating state can be constantly compensated.
- the assembly is simplified because the screw assembly does not have to be used with force against a constantly biased seal, but the assembly can be done without pressure-loaded seal.
- the screw arrangement also known as press screw
- the screw soul projects beyond the screw flights at the plug region.
- a component of the press screw is provided in the plug region, which is formed only by the screw soul, but not by the screw flights. In this area, an annular Feststoffpfropfen forms.
- the rotation of the screen basket creates a thin layer of solids one by one against the plug.
- the contact pressure results less from the geometry of the screw flights, but rather from the geometry at the ends of the screw flights.
- the end of the screw flight (or of the several screw flights) is formed on the plug region, ie on the end of the screw flights, as a plug pressing surface.
- this plug pressing surface has a pitch angle of less than 10 °, in particular less than 8 °, in particular less than 4 °.
- the lower limit of the pitch angle at the Pfropfenpress constitutional at 0 °, in particular 1 °.
- the plug pressing surface faces the end of the pressing screw or the plug region.
- the pitch angle is, as in a thread, defined as the angle between the helix and a perpendicular to the longitudinal axis of the helical soul.
- the Pfropfenpress Structure wear-resistant in particular harder than the rest of the screw helix is formed.
- the plug pressing surface is hardened and / or an additional, wear-resistant material is applied to the plug pressing surface.
- a discontinuous pitch of the screw flights is preferably used.
- the pitch of the screw flights in the inlet region begins primarily at an angle of 15 degrees to the vertical on the screw axis and narrows to the end of the screw flights at the beginning of the region of the plug.
- the screw soul protrudes by at least a length, in particular by at least two lengths, the largest pitch of the screw helix.
- the pitch of a helix is, just like a thread, defined as the height of a turn.
- This region of the screw core, which projects beyond the screw flights, is preferred during operation of the screw screw separator surrounded by a hollow cylindrical sieve. This area contributes significantly to the drainage of the plug.
- an increased pressure is exerted on the plug, so that it comes to the effective drainage.
- It preferably comprises each of the screw flights one of the plug pressing surfaces just described.
- the invention also includes a rotating or fixed press screw for a press screw separator to form a solid plug of slurry containing solid and liquid components.
- This screw conveyor comprises:
- FIG. 1 shows an overall view of the press screw separator according to the invention
- FIG. 2 shows the press screw separator according to the invention according to FIG. 1, with the strainer basket removed
- Figure 3 is a vertical section through the invention
- Figure 4 is a partially sectioned view of the invention
- FIG. 5 shows a detailed view of the seal arranged between the screw flight and the screen basket
- FIG. 6 shows a view of the seal in the ground state
- Figure 7 shows an advantageous embodiment of the screen basket of the invention
- FIG. 9 shows an advantageous embodiment of the discharge regulator of the invention
- Pressschneckenseparators 10 shows an advantageous embodiment of the press screw of the press screw separator according to the invention
- FIG. 12 is a detail view of a prior art press screw
- FIG. 13 is a detail view of the press screw of Fig. 1 1,
- Fig. 14 is a further detail view of the press screw of Fig. 1, and
- Fig. 15 shows a further advantageous embodiment of the press screw of the press screw separator according to the invention.
- a press screw separator 1 for the separation of solid components from a slurry containing solid and liquid components, such as waste water from municipal, industrial or agricultural operations, manure, etc., will be explained below.
- the press screw separator 1 has an inner space in which a screw arrangement 2 (also known as press screw) with at least one screw flight 3 is provided.
- the screw arrangement 2 is surrounded by a substantially cylindrical screen basket 4 such that an annular space is formed between the inside of the screen basket 4 and the screw arrangement 2.
- the axial length of the screen basket 4 is greater than that of the screw arrangement 2, so that the screen basket 4 projects beyond the screw arrangement 2 in the axial direction.
- the press screw separator 1 further comprises a substantially cup-shaped base part 5, which is provided with feet 6. Furthermore, an inflow 7 for the pulp to be treated is provided on the press screw separator 1 in order to feed it tangentially near the inner axial end of the screw arrangement 2, so that the pulp can be captured by the spiral screw 3. A clear run 8 is also on the press screw separator 1 at a location in radial alignment with Screw arrangement 2 is provided in order to be able to discharge the deposited on the outer periphery of the screen basket 4 separated liquid to the outside. In the present case, the inlet 7 and the clear water 8 are provided on the base part 5.
- the press screw separator 1 is provided with a preferably removable cover 10 surrounding the screen basket 4.
- 1 washing nozzles 1 1 are provided on the press screw separator, which are arranged distributed in a row over the height of the screen basket 4 in order to clean the outside of the screen basket 4 can.
- an annular support 12 which carries the drive for the screen basket 4.
- the drive comprises an asymmetrically arranged to screen basket 4 motor 13, possibly a reduction gear 14 to adjust the rotational speed of the output shaft of the motor 13 to a suitable level in predetermined levels or continuously, and arranged at the upper end of the screen basket 4 ring gear 15th which meshes with a pinion of the motor 14 and the reduction gear 13, respectively.
- the screen basket 4 can also be driven via a belt or chain drive or any other suitable drive.
- a ring 24 located between the upper flange of the screen basket 4 to the flange of the ring gear 15, a ring 24, on the inside of which a plug of solid forms and a discharge controller moves up and down in it.
- the drive drives the strainer basket 4 in such a way that it can rotate about the fixed screw arrangement 2.
- comprehensive discharge control is also stored, which exerts a pressure on the resulting plug and thus influences the dry matter content of the plug.
- the pressing pressure can be adjusted to the plug and thus the operation of the press screw separator can be influenced.
- Each press cylinder 16 presses on a yoke 17, which is supported on a cone ring 18 which rests on the upper edge of the screw assembly 2.
- the ejector may also include one or more weights 19 replacing the press cylinders 16. Such a configuration is shown in FIG.
- Another variant of the ejection regulator is shown in FIGS. 8 and 9.
- a funnel-shaped solids outlet 20 is provided, through which the solid components of the slurry can be removed.
- FIGS 5 and 6 show the exact location and structure of the seal 9.
- the wear-resistant seal 9 is cut out of a plate 21 spirally and attached to the screw helix 3.
- the screw helix 3 consists of two mutually spaced helical elements 22, which form a cavity between them, in which the seal 9 is received.
- a hose 23 is further arranged, which can be inflated hydraulically or pneumatically, while the seal 9 presses against the screen basket 4.
- Turbidity introduced via the inlet 7 into the interior of the screw conveyor 1 reaches the effective area of the screw arrangement 2 and is conveyed from the rotating screen basket 4 along the spiral spiral 3 from bottom to top in order to carry out an initial separation of the liquid phase of the slurry.
- the separated liquid phase exits through the screen basket 4 from the annular space and can flow off via the clear run 8.
- the already partially dewatered material is conveyed by the screw assembly 2 and the strainer 4 further up.
- the nachdrlindenden material forms a hollow cylindrical plug in the annular space, from which are squeezed on further compression, the remaining aqueous components and discharged through the screen basket 4 to the outside.
- the plug is therefore increasingly dewatered during its movement, so that finally a plug remains, consisting essentially of solid.
- a plug As soon as the solid grafted reaches the upper edge of the screw assembly 2, it presses against the acted upon by the pressing cylinders 16 and the weight 19 conical ring 18. Depending on the setting of the pressing cylinders 16 and the weight 19 and depending on the pressure of the plug on the cone ring 18 this is pushed upwards, thus regulating the solids output and plug formation.
- the solids plug can fall inwardly into the funnel-shaped solids discharge 20 and be discharged from there for further use.
- FIG. 7 shows an advantageous embodiment of the screen basket 4 of the press screw separator 1.
- 4 drivers 1012 are arranged on the inside of the screen basket. These drivers 1012 are located in particular in the plug region 106, that is to say after the screw flights 3, in order to set the solid plug in rotation.
- at least three drivers 1012 are arranged distributed on the circumference.
- FIG. 8 shows a further embodiment of the press screw separator 1. Accordingly, the ring 18 of the ejection regulator does not have to be conical. Furthermore, depending on the turbidity to be treated, the seal 9 can be omitted. As shown in Fig. 8 is preferably located between the screen basket 4 and the screen suspension, in particular the sprocket 15, an elastic ring 1013 to compensate for tolerances on the screen basket 4 and on the screw assembly 2.
- the elastic ring 1013 is preferably made of rubber and extends over the entire circumference of the screen basket 4.
- FIG. 9 shows an advantageous embodiment of the ejection regulator for all variants of the press screw separator 1 shown.
- the weight 19 is located outside of the press screw separator 1.
- the weight of the weight 19 is transmitted via a lever to a vertically guided linkage 1015.
- the linkage 1015 prints on the ring 18.
- FIGS. 10, 11, 13 and 14 an advantageous embodiment of the screw arrangement 2 (also: press screw) will be explained in more detail.
- This press screw can be combined with all other configurations of the press screw separator shown.
- Fig. 12 shows a diagram according to the prior art.
- Fig. 10 shows the press screw separator 1 without screen basket.
- 1 1 shows the advantageous press screw 1 with a cylindrical screw core 102 and two screw flights 3 arranged on the screw core 102.
- the screw core 102 extends along the longitudinal axis 101 1.
- the two screw flights 3 each have a pitch S.
- a start 105 of the press screw 2 is designed to introduce a slurry containing solid and liquid components.
- a plug region 106 In the left part of the illustration, there is a plug region 106. This plug region 106 is formed by the end of the screw flights 3 and an extension of the screw soul 102 without screw flights.
- the press screw 2 is used in the press screw separator 1, the pulp is introduced at the beginning 105 and pressed out along the screw core 102. As a result, the solid plug forms in the plug region 106.
- a plug pressing surface 108 is formed.
- the plug pressing surface 108 can only be seen on one of the screw flights 3.
- the plug pressing surface of the other spiral screw 3 is designed accordingly, but is located on the back of the illustration in Fig. 1 1.
- the exact design of Pfropfenpress Chemistry 108 will be explained in more detail with reference to the detail eyes in Fig. 13 and FIG.
- the two screw flights 3 have a pitch angle ⁇ . This pitch angle ⁇ is defined as an angle between the spiral flights 3 and a perpendicular to the longitudinal axis 101 1.
- Fig. 12 shows a detail view of a press screw according to the prior art. Compared to the advantageous press screw 2, the detail section of Figure 12 corresponds to the view A marked in Figure 1. According to the prior art, the layered application of the solid to the plug is sensed by the edge 10 of a rotating rotary press screw. The screw flights 3 themselves have to take on the task in their length, continuously bring the most concentrated as possible, but still transportable sludge / solid to the ends of the screw flights 3.
- FIGS. 13 and 14 show detail views according to view A, marked in FIG. 11.
- the conventional edge 10 is converted into the plug pressing surface 108.
- the plug pressing surface 108 is designed with a pitch ( ⁇ ') of less than 10 °, in particular between 1 ° and 3 °.
- a conventional press screw can be converted by abrasive machining into an advantageous press screw 2.
- a deliberately designed plug pressing surface 108 with a length of more than 36.3 mm can thus be produced.
- FIG. 14 shows a further improvement of the advantageous plug pressing surface 108.
- a wear-resistant material 109 was additionally welded onto the plug pressing surface 108.
- the key advantage results from the plug pressing surface 108 being a much larger pressing area than the conventional edge 10 (see FIG. 12). This ultimately allows a much higher dry matter content in grafting. Furthermore, due to the knowledge of the invention, the Helix be shortened so that it serves primarily for the continuous transport of the pulp.
- the screw arrangement 2 (also: press screw) will be explained in more detail with reference to FIG.
- This press screw can be combined with all other configurations of the press screw separator shown.
- the plug pressing surface 108 can also be arranged on the screw flights here. According to FIG. 15, the pitch S of the screw flights 3 decreases toward the end of the screw conveyor 2. The end of the press screw 2 is located at the plug region 106.
- These "incoming" screw flights 3 are advantageously applicable, in particular, to waste water without fibers and to the use of flocculants.
- the invention has been described above with reference to an embodiment in which the screw arrangement 2 is vertically aligned.
- the central longitudinal axis of the screw arrangement 2 can, however, also be oriented horizontally or inclined with respect to the vertical.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtration Of Liquid (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202011004153U DE202011004153U1 (en) | 2011-03-18 | 2011-03-18 | screw extractor |
DE201110018923 DE102011018923A1 (en) | 2011-04-28 | 2011-04-28 | Press screw and press screw separator |
PCT/EP2012/001101 WO2012126584A1 (en) | 2011-03-18 | 2012-03-12 | Press screw separator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2707206A1 true EP2707206A1 (en) | 2014-03-19 |
EP2707206B1 EP2707206B1 (en) | 2019-05-15 |
Family
ID=45855702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12709532.1A Active EP2707206B1 (en) | 2011-03-18 | 2012-03-12 | Press screw separator |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2707206B1 (en) |
WO (1) | WO2012126584A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT515482B1 (en) * | 2014-03-14 | 2016-03-15 | Andritz Ag Maschf | screw Press |
DE102016217073A1 (en) | 2016-09-08 | 2018-03-08 | Röhren- Und Pumpenwerk Bauer Ges.M.B.H. | Process for treating dirty water |
CN114984652B (en) * | 2022-06-10 | 2023-06-30 | 福建气好克环保科技有限公司 | Sewage circulation treatment device with self-cleaning roller screen |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2225231C3 (en) * | 1972-05-24 | 1976-01-08 | Hidetoshi Chikuho Kaho Fukuoka Hata (Japan) | Screw press |
DE3806582A1 (en) * | 1988-02-26 | 1989-08-31 | Mannesmann Ag | Drum filter |
US5357855A (en) * | 1991-09-24 | 1994-10-25 | Ishigaki Mechanical Industry Co., Ltd. | Screw press for dewatering a slurry |
JP2735997B2 (en) * | 1993-07-13 | 1998-04-02 | 有限会社アートレス | Separator |
AU7808194A (en) * | 1993-09-15 | 1995-04-03 | Gunther Abel | System and method of processing mixture of solids and liquids |
IT1294928B1 (en) * | 1997-09-17 | 1999-04-23 | Simona Curini | APPARATUS FOR SCREENING AND COMPACTION |
JP3858715B2 (en) * | 2002-02-12 | 2006-12-20 | 株式会社石垣 | Outer cylinder rotation type twin screw press |
JP4427798B2 (en) * | 2005-04-14 | 2010-03-10 | 株式会社石垣 | Operation control method and operation control device for differential speed rotary concentrator |
KR101255321B1 (en) * | 2005-06-16 | 2013-04-16 | 츠키시마기카이가부시키가이샤 | Filtering apparatus and filtering method |
DE202007007606U1 (en) | 2007-05-30 | 2008-10-09 | Röhren- und Pumpenwerk Bauer GmbH | screw extractor |
US8192624B2 (en) * | 2007-07-23 | 2012-06-05 | Tsukishima Kikai Co., Ltd. | Filtering apparatus |
-
2012
- 2012-03-12 WO PCT/EP2012/001101 patent/WO2012126584A1/en active Application Filing
- 2012-03-12 EP EP12709532.1A patent/EP2707206B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012126584A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012126584A1 (en) | 2012-09-27 |
EP2707206B1 (en) | 2019-05-15 |
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