• 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 screw centrifuge for wet mechanical separation of solids according to their density with a rotating cylindrical drum with two conical drums connected thereto, with openings for the discharge of the separated substances as a sink and Schwimmgut and the separating liquid, and a rotating shaft, with openings for the Entry of the solids to be separated, wherein the shaft has two-flight worm spiral, wherein a baffle plate is arranged on the shaft in the axial direction between the entry opening for the substances to be separated and the discharge opening for the dew. It is primarily characterized in that the outer spiral of the worm for the debris has a cover with the inner single or multi-start helix of the worm for the floating, wherein the helix are in opposite directions. The outer spiral of the worm for the debris can also be more smooth. As a result, a particularly high throughput can be achieved with a still high selective separation and a low residual moisture content. The invention also relates to a screw conveyor for such a screw centrifuge.
    公开号:AT518275A4
    申请号:T50367/2016
    申请日:2016-04-26
    公开日:2017-09-15
    发明作者:KLIMENTA Stefan；Franc Johann
    申请人:Andritz Tech And Asset Man Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a Sehneckenzentrifuge for wet mechanical separation of solids according to their density with a rotating cylindrical drum with two conical drums connected and openings for discharging the separated substances as degrits and Schwimmgut and the separating liquid, and a rotating shaft with openings for the entry of separating solids, wherein the shaft has two opposing screw spiral, wherein in the axial direction between the entry opening for the substances to be separated and the discharge opening for the material to be dumped a baffle plate is arranged on the shaft, wherein the outer turn! the snail for the dew to overlap with the inside turning! having the worm for the Schwimmgut, wherein the helix are in opposite directions.
    Such screw centrifuges are known, for example, from EP 0 553 793 B1. Such machines are limited in throughput for the light goods or floating. If the established throughput is increased, the machine locks with the product. Further similar machines are known from the DF 19S 16 636 Al or the FP 1 85 2.05 Bl. Such machines serve for a 3-phase separation of mixtures, e.g. Different plastic fractions and one separating liquid By suitable choice of the separating liquid in the density also several different fractions can be separated in multi-stage procedures.
    The aim of the invention is therefore to achieve a better separation and higher throughput.
    The invention is therefore characterized in that the screw for the floating material is designed as a multi-start screw. Thus, the throughput can be greatly increased with the same separation quality and product residual moisture, whereby a significant reduction of blockage / blocking of the machine is achieved despite higher throughputs.
    A favorable embodiment of the invention is characterized in that the screw flight for the material to be dewed extends to the drum and the screw flight for the floating material has a smaller outer diameter than the inner diameter of the screw turn! the snail for the dew. By this measure and the opposing nature of the two screws, the light material floating on the separating liquid can be transported from the inner coil to Leichtgutaustrag while the heavy material drops, sammeit on the drum wall and is transported from the outer coil to the opposite discharge. The separating liquid is deposited separately via nozzles.
    A favorable development of the invention is characterized in that the part of the overlap of the Schneckenwendei for the Sinkgut directly with the turn! connected for the floating, preferably welded, is. Thus, no additional supports are required, which could affect the paths of the separated goods.
    An advantageous development of the invention is characterized in that the screw is designed for the sinker as a multi-start screw. With a suitable choice of gears and pitch, the total capacity of a screw can be increased.
    The amount of product delivered by the respective helical turn (the product heap "in front of the helix") is significantly reduced compared to the single-helical helix, which supports the stability of the process, the separation of the product fractions, the transport of the respective fraction and the separation from the separation medium product throughputs.
    The invention will now be described by way of example with reference to the drawings, wherein
    1 shows a worm centrifuge according to the prior art
    Fig. 2 is a screw centrifuge according to the invention
    Fig. 3 shows a section through Fig. 2 along line ill-lli shows.
    In Fig. 1, the separator 10 consists of a cylindrical conical drum at both ends 11, Within the drum 11 is a two-piece screw conveyor 12 with screw flights 13 for discharging the Sinkgutes 16 and with screw flights 23 for discharging the floating material 17. By different design of the Schneckenwendeln, eg outer diameter, opposite spirals, the debris 16 and the floating 17 are transported to oppositely arranged discharge openings 14,15: the debris 16 to one or more discharge openings 14, the Schwimmgut 17 to one or more discharge openings 15. The separated from the debris and floating goods Separating liquid 18 is discharged via one or more nozzles 19 on the heavy goods side of the separating device 10. A baffle plate 20 prevents that during the separation process the floating material 17 can be detected by the coils 13 for the Sinkgut 16 and passes to the Sinkgutaustrag 14. The mixture to be separated of solids and separating liquid is applied via an axially arranged task tube 21 by one or more feed openings 22 in the container interior. By rotation of the drum 11 and the screw conveyor 12, the mixture, for example, suspension, set in rotation and generates a centrifugal field in the suspension. The screw conveyor 12 is usually driven at a different speed from the drum speed. As a result of the difference in density of the solids and the separating liquid takes place in a short time separation of the solids, wherein the light solid (floating 17) arranges on the surface of the separating liquid 18 and the heavy solid (debris 16) to the inner surface of the drum 11 decreases. The Schwimmgut is now detected by the screw 23 and fed to the discharge 15, the Sinkgut 16 is detected by the Schneckenwendei 13, lifted to the discharge opening 14 and due to the conical shape of the lateral surface of the drum 11 from the Trennfiüssigkeit and the discharge opening 14 from the drum 11 promoted. The conical part of the drum 11 in the region of the discharge opening 15 facilitates the separation of the floating material 17 from the separating liquid 18
    Fig. 2 now shows a screw centrifuge according to the invention with an analogous representation was selected to Fig. 1. The same parts are provided with the same reference numerals' as in Fig. 1. In order to achieve an improvement in throughput at the same Trennselektivität and Restfeftbte, the transport of the Sinkgutes 1.6 via coil 13 to the discharge opening 14 is supplemented by additional Parallei helix 13 '. This extension consists of one or more additional narrow (band) coil (s) 13 ', which (r) is arranged parallel to the coil 13 around the coil 23 (and 23') for the floating material 17 around. Due to the contrariness, there is a better separation of the solids. The reversible (s) 13,13 'is or are connected at different points with the coils 23, 23', for example, welded. As a result, the reversible 13,13 'are supported, there are no separate supports required, which can constrict the turning of the screw and can lead to blockage / entanglement of the machine. According to the invention, the worm spiral 23, 23 'is designed to be double-threaded for the floating material 17, as a result of which a better delivery and thus a higher throughput can be achieved. As the product to be processed (feedstock) often plastic mixtures of different densities are used, which are to be separated into swimming and Sinkgut-fractions. The separation leads depending on the application to a Trennseiektivität of well over 99% of the individual fractions. Thus, in addition to lumpy plastic mixtures or foils, fiber materials such as e.g. Carpet residues u.a. made of polypropylene, polyamide and latex are separated in a two-stage process and thus recycled. Also, the separated solids are subjected to some degree of washing during the separation process prior to their discharge. For even more effective separation, the two sets of augers for sinking and floating material can be installed as required, even with different pitches required for the process, allowing the machine to be perfectly matched to the process.
    Sn Fig. 3 is a section through Fig. 2 along the line lil-lli dargesteilt. It shows a section through the individual Schneckenwendei. In the upper part is the section through the first coil 23 of the screw 12 dargestelit for separation of the floating material 17. In the lower part can be seen a section through the second coil 23 'for the Scbwimmgut However, it is also possible to use further screw flights, so that the screw then optionally also has three or more screw flights. At the outer periphery of the coil 13 'is shown for the Sinkgut 16. At a catchy turn! for the debris 16, only the helix .13 'appears as shown in the upper part. In a double-threaded coil is also still Wendel 13 "as shown in the lower part of the drawing, available.
    The invention is not limited by the examples in the drawings. The edges of the Wendein can also be protected by wear pieces from excessive wear.
    In summary, it should be noted that the invention relates to a screw centrifuge for wet mechanical separation of solids by their density, comprising a rotating cylindrical drum with two conical drums connected thereto, with openings for the discharge of the separated substances as a sink and float and the separating liquid, and a rotating shaft, with openings for the entry of the solids to be separated, wherein the shaft has two opposing worm helix, wherein in the axial direction between the entry opening for the substances to be separated and the discharge opening for the Sinkgut a baffle plate is arranged on the shaft. In addition, the outer spiral of the worm for the Sinkgut an overlap with the inner single or multi-start helix of the worm for the floating, wherein the helix are in opposite directions. The outer spiral of the worm for the debris can also be more smooth. As a result, it is possible to achieve a particularly high throughput, with a still high selective separation and a low residual moisture content. The invention also relates to a screw conveyor for such a screw centrifuge.
    权利要求:
    Claims (6)
    [1]
    claims
    1. Centrifugal centrifuge for the wet mechanical separation of solids according to their density with a rotating cylindrical drum (11) with two conical drums connected thereto, with openings (14,15) for the discharge of the separated substances as degrits (16) and floating (17) and the separating liquid (18), and a rotating shaft (12) with openings (22) for the entry of the solids to be separated, wherein the shaft (12) has two counter-rotating screw flights (13,13 ', 13 ", 23, 23') wherein in the axial direction between the entry opening (22) for the substances to be separated and the discharge opening (14) for the debris (16) a baffle plate (20) is arranged on the while, wherein the outer coil (13 ', 13 ") the auger (16) has an overlap with the internal helix (23, 23 ') of the auger (17) for the auger (17), the helix (13, 13', 13 ", 23, 23 ') being in opposite directions, characterized in that the screw for the Schwimmg ut (17) is designed as a multi-start screw.
    [2]
    2. Slug centrifuge according to claim 1, characterized in that the screw flight (13,13 ', 13 ") for the Sinkgut (16) to the drum (11) and reaches the screw flight (23, 23') for the Schwimmgut (17) a smaller outer diameter than the inner diameter of the screw helix (13 ', 13 ") of the screw for the Sinkgut (16).
    [3]
    3. centrifuge according to claim 1 or 2, characterized in that the part of the overlap of the screw flight (13 ', 13 ") for the Sinkgut (16) directly to the screw helix (23, 23') for the Schwimmgut (17), preferably welded, is.
    [4]
    4. screw centrifuge according to one of claims 1 to 3, characterized in that the screw for the Sinkgut (16) is designed as a multi-start screw.
    [5]
    5. screw conveyor for a screw centrifuge according to one of claims 1 to 4, characterized in that the shaft (12) has two opposite spiral screw (13,13 ', 13 ", 23, 23'), wherein the outer coil (13 ', 13 ") of the auger (16) has an overlap with the inner helix (23, 23 ') of the auger (17), the helix (13, 13', 13", 23, 23 ') are in opposite directions and the screw for the Schwimmgut (17) is designed as a multi-speed screw.
    [6]
    6. screw conveyor according to claim 5, characterized in that the screw for the Sinkgut (16) is designed as a multi-start screw.
    类似技术:
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    EP1468744A1|2004-10-20|Pusher centrifuge with rotatable cone for pre-accelerating the mixture
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    DE3301099C2|1987-12-03|
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    EP0076476A2|1983-04-13|Decanter centrifuge
    EP1468742A1|2004-10-20|Multi-stage pusher-typ centrifuge
    DE1757368C3|1979-02-08|Solid bowl screw centrifuge
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    DE2228997C2|1986-04-17|Solid bowl screw centrifuge
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    同族专利:
    公开号 | 公开日
    US20170304846A1|2017-10-26|
    EP3238828A1|2017-11-01|
    JP2017196615A|2017-11-02|
    CA2963405A1|2017-10-26|
    AT518275B1|2017-09-15|
    JP6840011B2|2021-03-10|
    US10213791B2|2019-02-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2528974A|1945-09-19|1950-11-07|Process Dev Company|Method and apparatus for centrifugal separation|
    DE2612696A1|1975-04-01|1976-10-14|Pennwalt Corp|FULL-CASE DECANTING CENTRIFUGE|
    DE3134935A1|1980-09-09|1982-06-09|Alfa-Laval Separation A/S, 2860 Soeborg|"CENTRAL DECANTER CENTRIFUGE"|
    US4781822A|1985-08-08|1988-11-01|Minpro Pty. Limited|Spiral separator|
    DE4208104A1|1992-01-31|1993-08-05|Kloeckner Humboldt Deutz Ag|DEVICE AND METHOD FOR WET MECHANICAL TREATMENT OF SOLIDS|
    US2919848A|1956-03-14|1960-01-05|Andrew F Howe|Centrifugal separation|
    DE4222119C2|1992-07-06|1997-07-10|Deutz Ag|Device and method for the wet mechanical separation of solid mixtures|
    DE4305346A1|1993-02-20|1994-08-25|Kloeckner Humboldt Deutz Ag|Device and method for the wet-wash concentration of solids|
    DE19901655A1|1999-01-18|2000-07-20|Baker Hughes De Gmbh|Centrifuge for wet mechanical separation of solid mixtures|
    JP2002186878A|2000-12-21|2002-07-02|Nkk Corp|Wet type specific gravity separation apparatus and operation method thereof|
    DE10212187A1|2002-03-20|2003-10-02|Hiller Gmbh|screw centrifuge|
    AT518275B1|2016-04-26|2017-09-15|Andritz Tech And Asset Man Gmbh|SCHNECKENZENTRIFUGE FOR WET MECHANICAL SEPARATION OF SOLIDS|AT518275B1|2016-04-26|2017-09-15|Andritz Tech And Asset Man Gmbh|SCHNECKENZENTRIFUGE FOR WET MECHANICAL SEPARATION OF SOLIDS|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50367/2016A|AT518275B1|2016-04-26|2016-04-26|SCHNECKENZENTRIFUGE FOR WET MECHANICAL SEPARATION OF SOLIDS|ATA50367/2016A| AT518275B1|2016-04-26|2016-04-26|SCHNECKENZENTRIFUGE FOR WET MECHANICAL SEPARATION OF SOLIDS|
    EP17159643.0A| EP3238828A1|2016-04-26|2017-03-07|Helical conveyor centrifuge for the wet mechanical separation of solids|
    JP2017067514A| JP6840011B2|2016-04-26|2017-03-30|Screw centrifuge with auxiliary outer spiral for wet mechanical separation of solids|
    CA2963405A| CA2963405A1|2016-04-26|2017-04-05|Screw centrifuge for wet mechanical separation of solids|
    US15/494,853| US10213791B2|2016-04-26|2017-04-24|Screw centrifuge with auxiliary outer screw flight for wet mechanical separation of solids|
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