• 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 vertical screw press (1) for the separation of solids, e.g. Fibers from a suspension, e.g. Pulp suspension, with a cylindrical screen basket (9, 10, 11) and in the screen basket (9, 10, 11) via a drive (2) rotatably mounted press screw with a central worm shaft (12) and arranged thereon, at least over a large part the worm shaft (12) extending, preferably double-winged, spiral screw (13), wherein a feed (8) for the suspension, a drain (6) for filtrate and a discharge (7) for the dehydrated solid are provided. It is primarily characterized in that the cylindrical strainer basket (9, 10, 11) is surrounded by a filtrate retention container (3, 4, 5), seen in the axial direction consists of several parts and at least a part, preferably the lowermost part (5), a filtrate Rückstaubehälter having a larger diameter, wherein the rotatable screw shaft (12) can be made reversible, wherein the inlet (8) for the suspension at the upper end and the discharge (7) for the dewatered solids at the lower end is provided, whereby the The conveying direction of the screw press (1) from top to bottom and wherein a drain (6) for filtrate at the lower end of the Filtratrückstaubehälters (5) is provided. This enables efficient drainage on the one hand and good accessibility for cleaning and maintenance without disassembling the entire machine on the other hand.
    公开号:AT515482A1
    申请号:T186/2014
    申请日:2014-03-14
    公开日:2015-09-15
    发明作者:Peter Ortner；Wolfgang Dipl Ing Magor
    申请人:Andritz Ag Maschf；
    IPC主号:
    专利说明:

    The invention relates to a vertical screw press for depositing solids, e.g. from fibrous sludges, for example from deingking plants or fibers from a pulp suspension, for example pulp suspension, with a cylindrical sieve basket and a press screw rotatably mounted in the sieve basket via a drive with a central worm shaft and arranged thereon, preferably at least over a majority of the worm shaft , Schneckenwendel, wherein a feed for the suspension, a drain for filtrate and a discharge for the dewatered solid are provided.
    Suspensions, in particular pulp suspensions, for example pulp suspensions from the pulp and paper industry, which contain fibers, are generally dewatered and the solid constituents are compacted. Often horizontally oriented screw presses are used with Lochsiebkörben. However, such screw presses can dehydrate and transport suspensions efficiently only from a minimum content of about 8 to 10% fibers. In the case of larger horizontal screw presses, the double bearing required for the screw press or worm shaft is disadvantageous and costly.
    Furthermore, helical or vertically oriented screw presses e.g. known from AT 509 618 A1. In such screw presses there is a risk that they clog, in which case the entire screw press must be disassembled in order to clean them accordingly.
    The object of the invention is therefore to provide a screw press with a vertical axis, which has a high efficiency in throughput and drainage and easy in blockages, i. in a short time, to clean.
    The invention is therefore characterized in that the cylindrical strainer basket is surrounded by a Filtratrückstaubehälter, seen in the axial direction consists of several parts and at least a part, preferably the lowermost part, a Filtratrückstaubehälter having a larger diameter, wherein the rotatable screw shaft can be made reversible , wherein the feed for the suspension at the upper end and the discharge of the dewatered solids at the lower end, whereby the conveying direction of the screw press from top to bottom and wherein a drain for filtrate is provided at the lower end of the Filtratrückstaubehälters and wherein the Filtratrückstaubehälter with larger diameter vertically, ie can be designed to be displaceable in the axial direction. By means of the larger diameter filtrate holdback container, and in particular a displaceable design, the screw helix can be easily removed from the obstructions by e.g. pressed fibers, clean.
    A favorable development of the invention is characterized in that the Filtratrückstaubehälter, in particular the parts of the Filtratrückstaubehälters are divisible in the axial direction, i. consist of at least two parts. This allows the space around the worm shaft and worm helix to be opened in a simple manner.
    An advantageous embodiment of the invention is characterized in that a dilution chamber is provided at the upper end of the Filtratrückstaubehälters, wherein the dilution chamber may have at least one outlet opening. Due to the dilution on entry, for example, in the event of a blockage, a dissolution of the plug can be achieved and the dilute suspension can be removed via the outlet opening (s).
    An advantageous development of the invention is characterized in that the worm shaft has openings, for example a perforation, on at least one shaft end. Thus, at low inlet concentrations, a high drainage can be achieved already at entry. As a result, both sides of the drainage can achieve high drainage rates and thus a high efficiency of the screw press.
    A favorable embodiment of the invention is characterized in that the lower end of the worm shaft is not stored in the radial direction or free of bearings and / or that the worm shaft is mounted exclusively at its upper end, in particular bearing-fixed in the radial direction. Thus, a complicated bearing and a complicated construction of the discharge can be avoided. By a high concentration of the dehydrated solid, e.g. Pulp, the plug at the bottom of the screw spiral can serve as a kind of radial bearings.
    The invention will now be described by way of example with reference to the drawings, in which Fig. 1 is a view of a screw press according to the invention,
    Fig. 2 shows a section through a screw press according to the invention along line II-II according to
    Fig. 1,
    3 shows a section through a screw press according to the invention in the operating and cleaning state analogous to FIG. 2,
    4 shows a cross section through an inventive screw press along line IV-IV in Fig. 2,
    5 shows a cross section through an inventive screw press along line V-V in Fig. 2,
    6 shows a cross section through an inventive screw press along line VI-VI in Fig. 2,
    Fig. 7, 7a, 7b, 7c, 7d illustrates the pressure profile over a screw press according to the invention.
    Fig. 1 shows a vertical screw press 1 according to the invention which has a drive 2 at its upper end. Furthermore Filtratrückstaubehälter 3, 4, 5 can be seen with a Filtratablauf 6 and at the bottom of a discharge 7 for the dewatered solid (pulp or sludge). At the upper end of the inlet 8 for the (pulp) suspension can be seen.
    It can also summarized the Filtratrückstaubehälter 3 and 4 and consist of one piece, depending on the size of the screw press. It is important, however, that the lowermost Filtratrückstaubehälter 5 is formed separately. Also can be seen arranged at the upper end dilution chamber 14 and the corresponding outlet opening 15th
    Fig. 2 shows a longitudinal section through a screw press 1 according to the invention along line II-II in Fig. 1. The same parts are provided with the same Bezugsziffem. It can be seen here again the filtrate Rückstaubehälter 3,4 and 5 and the discharge 7 for the dewatered solid and the feed 8 for the suspension. In particular, it can be seen that the lower Filtratrückstaubehälter 5 has a larger diameter than the overlying Filtratrückstaubehälter 3 and 4 (which may also be designed as a common part). The division of the Filtratrückstaubehälters into several parts is recognizable. Within the Filtratrückstaubehälter 3, 4, 5 can be seen the parts 9, 10, 11 of the likewise divided into corresponding parts cylindrical screen basket. To the worm shaft 12, the double-winged spiral screw 13 is mounted, the slope of which decreases towards the discharge 7 and thereby generates a higher dewatering pressure, which leads to a plug consisting of pulp or sludge and prevents the escape of liquid. This grafting subsequently also makes it possible for the worm shaft 12 to have no bearing at its lower end and thus to be supported radially only at the upper end in the case of the drive 2. The mode of operation is now as follows: The suspension, for example fiber suspension with pulp fibers, is introduced through the inlet 8 at the upper end into the vertically arranged screw press 1. It is guided by the annular gap formed between the worm shaft 12 and screen basket 9, 10, 11 by the spiral screw 13 down and compressed by the decreasing slope, whereby the liquid (usually water) is pressed out of the fiber composite. At the lower end of the Filtratrückstaubehälters 5, the pressed out liquid is discharged through the Filtratablauf 6 (see Fig. 1).
    In Fig. 3, the procedure for cleaning after clogging is now shown. But it also allows easy repair or replacement of parts of the screen basket, which are heavily stressed and therefore quickly worn out. As a first step, a supply of dilution water (for example, filtrate) to the suspension and thus a supply of highly diluted suspension via the inlet 8. This loosens the already squeezed solid on. By rotation of the worm shaft 12 against the direction of rotation in operation, the loosened solid (and thus plug, which clogs the system) is transported to the upper end and discharged there via an outlet opening 15.
    As an alternative to dilution of the solid, it is also possible to introduce liquid (filtrate or clear water) into the filtrate retention container (s) from above through a connection 19. As a result, the rewetting takes place essentially at the surface of the solid plug to the screen basket. By moistening the solid can be solved and discharged in many cases, without requiring a reversal of the direction of rotation of the worm shaft 12. The discharge of the dissolved Feststoffpfropfens then takes place through the normal discharge. 7
    If this humidification or dilution does not lead to success or parts of the screen basket should be replaced, this would be done analogously to the right image in FIG. Here it can be seen that the lower Filtratrückstaubehälter 5, which has a larger diameter as the remaining Filtratrückstaubehälter 3.4 is released from the lower flange 16 and pushed over the higher Filtratrückstaubehälter 3, 4. As a result, the lowermost part 11 of the screen basket is easily accessible and can e.g. when training as half shells easily solved and removed. This then also an access to the lower portion of the screw coil 13 is possible in the blockages are most likely. These blockages can then be easily removed without having to disassemble the entire system. That there is no need to remove the supply lines, drive or top filtrate retention tanks.
    Should the lower part 11 of the screen basket already be worn, a simple quick repair or replacement can be made in this way.
    4 shows a section through the screw press 1 according to the invention in accordance with line IY-IV in FIG. 2. It can be seen here the larger diameter of the Filtratrückstaubehälters 5 and the worm shaft 12 together with screw flight 13 and the Siebkorb (part) 11, which is executed shared, for easy assembly / disassembly.
    5 shows a section through the screw press 1 according to the invention in accordance with line VV in FIG. 2. Here, in addition to the screen basket (part) 9, the perforated screen tube and the inner cavity 18 can be seen well, into which at least in the initial region dewatering, whereby a high dewatering rate is achieved especially for suspensions with low concentration (consistency).
    In Fig. 6 the section through the screw press 1 according to the invention according to line VI-VI in Fig. 2 through the dilution chamber 14 at the upper end of the screw press 1 is shown.
    7 shows a screw press 1 in which the pressure curve over the height of the screw press 1 in the region of the drainage on the strainer basket 9, 10, 11 is shown. In the example, a filling with filtrate and the resulting pressure is shown practically over the entire height. Depending on the material to be drained, a lower filtrate height can also be set. In the gap 17 is the suspension, while in the Filtratrückstaubehälter 3, 4, 5 builds up a back pressure by the squeezed filtrate. The diagram in Fig. 7a shows the increasing hydrostatic pressure of the suspension, the diagram subsequent thereto Fig. 7b shows the correspondingly increasing hydrostatic pressure of the filtrate, which builds up within the filtrate backhoe containers 3, 4, 5. This is possible in particular by the vertical arrangement of the screw press 1. This results in a constant differential pressure Δ p over the entire dewatering height (see FIG. 7 c). Due to the decreasing pitch of the screw flight 13, a continuously increasing dewatering force can now be achieved (FIG. 7 d). Depending on the quality and drainage properties of the solids to be drained, the height of the filtrate backpressure and thus also the counterpressure generated are adjusted.
    The invention is not limited by the illustrated examples. Thus, e.g. the worm shaft also be tapered, so that the gap between the worm shaft and screen basket in the conveying direction of the screw spiral is reduced and thus the dewatering pressure is increased. The worm shaft may be at its lower end, e.g. be stored radially at low Austrags consistencies, as well as provided at higher Austrags consistencies without storage.
    权利要求:
    Claims (8)
    [1]
    Claims 1. Vertical screw press for separating solids, e.g. from fibrous sludges, for example from deingking plants or fibers from a pulp suspension, for example pulp suspension, with a cylindrical sieve basket and a press screw rotatably mounted in the sieve basket via a drive with a central worm shaft and arranged thereon, preferably at least over a majority of the worm shaft , Schneckenwendel, wherein a feed for the suspension, a drain for filtrate and a discharge for the dehydrated solid are provided, characterized in that the cylindrical strainer basket (9, 10, 11) by a Filtratrückstaubehälter (3, 4, 5) is surrounded , seen in the axial direction consists of several parts and at least a part, preferably the lowermost part (5), a Filtratrückstaubehälter having a larger diameter, wherein the rotatable worm shaft (12) can be made reversible, wherein the inlet (8) for the Suspens ion at the upper end and the discharge (7) for the dewatered solids at the lower end, whereby the conveying direction of the screw press (1) from top to bottom and wherein a drain (6) for filtrate at the lower end of the Filtratrückstaubehälters (5) is provided.
    [2]
    A vertical screw press according to claim 1, characterized in that the larger diameter filtrate holdup container (5) is vertical, i. is formed displaceable in the axial direction.
    [3]
    3. Vertical screw press according to claim 1 or 2, characterized in that the filtrate Rückstaubehälter, in particular the parts (3, 4.5) of the Filtratrückstaubehälters, are divisible in the axial direction, i. consist of at least two parts.
    [4]
    4. vertical screw press according to one of claims 1 to 3, characterized in that at the upper end of the Filtratrückstaubehälters (3) a dilution chamber (14) is provided.
    [5]
    5. Vertical screw press according to claim 4, characterized in that the dilution chamber (14) has at least one outlet opening (15).
    [6]
    6. Vertical screw press according to one of claims 1 to 5, characterized in that the worm shaft (12) has openings, for example a perforation, on at least one shaft end.
    [7]
    7. Vertical screw press according to one of claims 1 to 6, characterized in that the lower end of the worm shaft (12) is not stored in the radial direction or free of bearings and / or the worm shaft (12) exclusively at its upper end, in particular bearing-fixed in the radial direction , stored.
    [8]
    8. vertical screw press according to one of claims 1 to 7, characterized in that at the upper end of the uppermost Filtratrückstaubehälters (3) a nozzle (19) is provided, which is connected to a liquid supply, whereby a re-humidification of the solid can be achieved in blockages ,
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2364292A1|1973-12-22|1975-07-03|Salzgitter Maschinen Ag|CHIP PRESS|
    DE1627980U|1951-03-31|1951-09-13|Kienzle Apparate Gmbh|COMPUTER FOR MOTOR VEHICLES.|
    LU32627A1|1953-01-16|
    DE1627980A1|1967-02-14|1971-09-09|Weigelwerk Ag|Spindle press, preferably beet pulp press|
    SU640859A1|1977-01-13|1979-01-05|Всесоюзное Научно-Производственное Объединение Целлюлозо-Бумажной Промышленности|Vertical worm-screw press|
    SU735439A1|1978-07-05|1980-05-25|Опытно-Конструкторское Бюро При Сибирском Ордена Трудового Красного Знамени Научно-Исследовательском Институте Сельского Хозяйства|Apparatus for dehydrating, e.g. green fodder|
    DE3641250A1|1986-12-03|1988-07-28|Salzgitter Maschinenbau|SPINDLE PRESS|
    DE3641248A1|1986-12-03|1988-07-28|Salzgitter Maschinenbau|SPINDLE PRESS|
    CN2214288Y|1994-08-13|1995-12-06|化学工业部上海化工研究院|Cone type continuous filter press|
    FR2784315B1|1998-10-09|2000-12-29|Bonnet Cidelcem Grande Cuisine|SPIN AND COMPACTION ASSEMBLY OF FOOD WASTE|
    DE202007007606U1|2007-05-30|2008-10-09|Röhren- und Pumpenwerk Bauer GmbH|screw extractor|
    CN101806530B|2009-02-16|2012-09-05|张学骞|Vertical centrifugal hydroextractor|
    AT509618A1|2010-03-18|2011-10-15|Celtec Gmbh|screw extractor|
    JP5548007B2|2010-03-31|2014-07-16|水ｉｎｇ株式会社|Screw type dehydrator|
    WO2012126584A1|2011-03-18|2012-09-27|Röhren- Und Pumpenwerk Bauer Ges. M. B. H.|Press screw separator|EA202090953A1|2017-10-17|2020-07-08|Общество с ограниченной ответственностью "ЭнергоЛесПром"|SELF-CLEANING DYNAMIC AUGER|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA186/2014A|AT515482B1|2014-03-14|2014-03-14|screw Press|ATA186/2014A| AT515482B1|2014-03-14|2014-03-14|screw Press|
    PCT/EP2015/054526| WO2015135810A1|2014-03-14|2015-03-04|Screw press|
    EP15710135.3A| EP3116710B1|2014-03-14|2015-03-04|Screw press|
    CN201580014191.XA| CN106103070B|2014-03-14|2015-03-04|Pressafiner|
    RU2016138666A| RU2687116C2|2014-03-14|2015-03-04|Screw press|
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