EP1383607A1 - Vollmantel-schneckenzentrifuge und verfahren zur ölgewinnung mit einer vollmantel-schneckenzentrifuge - Google Patents
Vollmantel-schneckenzentrifuge und verfahren zur ölgewinnung mit einer vollmantel-schneckenzentrifugeInfo
- Publication number
- EP1383607A1 EP1383607A1 EP02737984A EP02737984A EP1383607A1 EP 1383607 A1 EP1383607 A1 EP 1383607A1 EP 02737984 A EP02737984 A EP 02737984A EP 02737984 A EP02737984 A EP 02737984A EP 1383607 A1 EP1383607 A1 EP 1383607A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw
- solid bowl
- centrifuge according
- drum
- separation elements
- 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
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/10—Production of fats or fatty oils from raw materials by extracting
Definitions
- the invention relates to a Nollmantel-screw centrifuge according to the preamble of claim 1 and a method for oil production with a solid-bowl screw centrifuge.
- the object of the invention is to solve this problem both in terms of construction and in terms of process technology.
- the invention solves this problem on the one hand by a particularly advantageous solid-bowl screw centrifuge, the features of which are specified in claim 1. It also solves them by means of a particularly advantageous method for extracting oil, the features of which are specified in claim 24.
- segregation elements protrude into the centrifugal space, at least in sections, which extend inwards from the inner circumference of the drum and the screw blade also covers the region of the segregation elements.
- the solid-bowl screw centrifuge equipped in this way is particularly - but not only - suitable for use in a process for extracting oil from fruits and seeds and for better dewatering and / or deoiling of pulp from organic African materials (e.g. seed porridge, pulp mash, animal tissues such as fish, egg, adipose tissue cells).
- organic African materials e.g. seed porridge, pulp mash, animal tissues such as fish, egg, adipose tissue cells.
- the separation zone is quite close to the screw body (10, 20 ..., up to 40 to 50 mm distance).
- the fresh oil is considered clean
- Phase can be seen only 20 to 30 mm outside the screw body. There is a clean dividing line here.
- the introduced solid as part of the supplied suspension will fill the machine so far that it is filled with solid suspensions up to the oil separation zone (approx. 10, 20 ... up to a maximum of 40 to 50 mm outside the screw body).
- the oil separation zone approximately 10 mm
- the solid is drier on the outside than inside or in other words, the dry matter content on the drum side is much higher than the dry matter content on the inside.
- the separation elements are rigidly connected to the drum and have the same rotational speed as the drum.
- the screw In operation, the screw generally rotates. slightly faster than the drum (e.g. 10 - 20rpm). This results in a solid transport in the direction of the cone, where the solid is discharged with the water as a suspension. Since e.g. Rod- or needle-like segregation elements that have a lower drum speed, they mix the solid pulp, which improves the oil release.
- the screw blade On its outer circumference, the screw blade is preferably provided with cutouts (either one or more windows per screw flight or a cutout extending over one or more complete screw flights, ie the width of the screw is smaller in the area of the cutouts). Especially through the combination of recesses and separation elements the efficiency of oil production increased again. According to a variant, these cutouts are designed in such a way that channels form in the screw blade in the axial direction. It is also conceivable for the worm blade to have a continuous recess on its outer circumference via one or more axially offset separation elements.
- Stirring elements basically for the purpose of conveying in the conical area.
- the invention creates a solid-bowl screw centrifuge, which combines the advantages of a centrifuge with a screw with regard to the fixed discharge through the screw as well as that of the stirring elements, which is due to the interaction of the recesses in the screw and the separation elements becomes possible.
- the separation elements are preferably rod-shaped and have an essentially cylindrical or angular cross section.
- the segregation elements taper inwards from the inside wall of the drum. The tapering of the separation elements causes the kneading effect to increase towards the outside.
- the separation elements are rectangular, trapezoidal, rounded and / or tapered and / or widening at least in sections from the inside wall of the drum.
- the segregation elements preferably protrude so far into the centrifugal space that they penetrate a substantial portion of the solid water phase when processing a centrifugal material for oil extraction. According to one variant, there remains between the separation elements and the screw body
- the recesses are also designed such that in the region of the recesses on the screw body, a remaining section of the screw blade remains on the circumference of the screw body, which preferably has a radial extension which corresponds at least to the radial extension of the oil and / or emulsion phase during oil extraction ,
- the screw and drum particularly preferably have a cylindrical section and a tapering section adjoining it, the recesses and separation elements exclusively in the area of the cylindrical section
- the cutouts are formed on the worm in such a way that at least one axial channel extending over several worm threads and / or one to the central axis of the
- Snail forms angled channel and / or a zigzag channel. It is particularly advantageous if the recesses are designed such that channels are formed in the circumferential direction in the radial direction in a multi-start screw in the screw blade, through which the pins can pass when the screw is rotated.
- At least one, preferably two to six, recesses are formed in the screw blade per screw flight, and at least one, preferably two to six, segregation elements protrude into the conveyor track per revolution. Due to the relative rotation, a recess can also be between
- Drum and screw are already sufficient to allow multiple pins to pass through.
- Symmetrical arrangements are preferably selected, for example only one pin per screw flight, offset by 90 ° to each other at four screw flights lying one behind the other or, for example, four pins per screw flight, each offset by 90 ° to one another on the circumference. In practice, it has proven useful if three to seven screw flights of the centrifuge are provided with the separation elements and recesses.
- the invention also provides a method for extracting oil from fruit or seeds, in which the oil as a liquid phase is separated directly from a second mixed phase of water and solids in a two-phase separation cut, a screw area being passed through in the solid bowl screw centrifuge, in which recesses are formed in the screw conveyor and inward extending from the drum separation elements in the conveyor track.
- the invention is also suitable for clarification with less structure, i.e. fine compressible sludge with small solid particles (for clarifying liquids that are difficult to clarify, e.g. fruit mash or waste water, structureless pulp, seed porridge or seedless olive porridge, oil extraction from fruit or seeds).
- structure i.e. fine compressible sludge with small solid particles (for clarifying liquids that are difficult to clarify, e.g. fruit mash or waste water, structureless pulp, seed porridge or seedless olive porridge, oil extraction from fruit or seeds).
- Fig. 1 shows a section through a section of an inventive
- Fig. 3 is a table which illustrates the efficiency of the centrifuge according to the invention with a comparative decanter.
- FIG. 1 shows a solid-bowl screw centrifuge 1 with a drum 3, in which a screw 5 is arranged.
- the drum 3 and the screw 5 each have an essentially cylindrical section 3a, 5a and a conically tapering section 3b, 5b.
- the screw 5 has a screw body 7 and here a screw blade 9 which surrounds the screw body 7 several times and which forms a plurality of screw flights (9a, 9b, 9c, etc.).
- a conveyor track 11 for conveying / transporting a centrifugal material to be processed is also formed between the screw flights 9a, 9b, 9c,...
- An optional rail-like structure made of grooves 12 or grooves is provided on the inner wall of the drum to improve the conveyance of solids.
- a baffle plate (not shown here) can be placed on the screw body 7. This has proven particularly useful in the two-phase separation. In a three-phase separation into the oil phases , Water and solids is not absolutely necessary.
- An axially extending central inlet pipe 13 serves to feed the centrifuged material S via a distributor 15, which is here perpendicular to the inlet pipe 13, into the centrifugal chamber 17 between the screw 5 and the drum 3.
- the centrifuged material S is guided here, for example, through the centrally arranged inlet pipe 13 into the distributor 15 and from there into the centrifugal chamber 17 and accelerated to the operating speed during this process.
- the screw 1 rotates at a somewhat lower or greater speed than the drum 21 and conveys the ejected solid F to the conical section 3b out of the drum 3 for the solid discharge (not shown here, known per se).
- the liquid flows to the larger drum diameter at the rear end of the cylindrical section 3a of the drum 3.
- the oil phase generally shows. impurities, e.g. solid particles, e.g. can be separated in a separator downstream of the solid bowl screw centrifuge.
- An essential goal of the constructive further development of solid-bowl screw centrifuges for oil extraction is to increase the efficiency or an increase in the oil yield as well as - associated with this - in the reduction of the residual oil content in the solid AVasse ⁇ hase.
- segregation elements 19 extend inwards from the drum wall into the centrifugal space 17.
- these separation elements are designed as bolts 21 with a bolt head 21a, an adjoining threaded region 21b and an adjoining smooth cylindrical region 21c.
- the bolts penetrate from the outside bores 23 in the jacket 25 of the drum 3, so that the bolt heads 21a come to rest on the outside of the drum wall, the threaded region 21b being screwed into a corresponding internal thread of the bores 23.
- the rod-shaped region 21c projects radially or obliquely inwards into the drum.
- it has an extension or height h of approximately 2/3 of the width of the centrifugal chamber (pond depth T).
- the radial extension should be preferred be dimensioned such that it still essentially penetrates the middle dispersion phase when processing a centrifugal material, but does not extend into the oil phase.
- the blade sections or segments can either be separated in such a way that the screw blade 9 is separated up to the circumference of the screw body 7. Alternatively and particularly advantageously, however, a remaining section 29 of the screw body 7.
- Snail blade 9 remain on the circumference of the screw body 7, which should have a radial extension which corresponds to the radial extension of the oil and emulsion phase.
- the comminuted Fruits such as olives or avocados are first passed in a solid-bowl screw centrifuge through a separation zone with one or more screw flights 9a, ..., in which the screw blade 9 has no recesses 27 and in which no segregation elements 19 are formed in the conveyor track, whereupon in a second area is traversed in the separation zone, in which the recesses 27 in the screw blade 5 and the separation elements 19 are formed on the inside wall of the drum, whereupon the solids and the water past a baffle plate 30 outside the separation zone into the preferably conically tapering section of the screw be promoted.
- the worm 1 - viewed in FIG. 1 from the rear inlet zone towards the conical section - initially has a few helical gears, in the area of which the worm blade 9 is designed to be continuous or recess-free.
- at least one or two screw flights are continuous.
- No additional segregation elements 19 are provided in the conveyor track 11 in this area either.
- This zone is followed by a few screw flights 9a,... Which are provided with the recesses 27 and in each of which at least one or more of the separation elements 19 protrude into the interspaces or in the conveying tracks 7 thereof.
- This zone extends at most to the beginning of the conical section 11 of the screw 1.
- the baffle plate 30 is also arranged.
- the screw should preferably be designed without a recess.
- At least one, preferably 2 to 6, in particular 3 to 5, very particularly preferably 4 recess (es) 27 are formed per screw flight.
- segregation element (s) 19 on the inside wall of the drum for each screw flight in the conveyor track.
- the segregation elements 19 are preferably distributed uniformly around the circumference of the screw body 3 (prevention of unbalance).
- the diameter of the rod-shaped segregation elements is, for example, in the range from 2 to 25 mm.
- the area of the cutouts is preferably approximately 50 ° of the area of the pushrod.
- the separation elements 19 are screwed into the drum 3 through the drum wall and extend into the interior, ie the centrifugal space of the drum 3.
- the separation elements 19 are thus rigidly connected to the drum 3 and thus have the same rotational speed as the drum 3.
- the screw 5 rotates at 10 to 20 rpm faster than the drum 3. This results in a solids transport in the direction of the cone, where the solids with the Water is discharged as a suspension.
- the recesses 27 in the screw 5 have the effect that in the area of the recesses (recesses 27) no solids can be transported at the screw speed in the direction of the cone. There is therefore a relative velocity of the solids in the area of the recesses 27, and part of the slurry flows backwards, so to speak.
- the segregation elements protrude into the area of the recesses 27, whereby the backflow is accelerated, since the segregation elements have the drum speed, which is lower than the screw speed. This causes the middle phase of the slurry to mix, which improves the oil release and thus also facilitates separation and thus phase separation (see FIG. 2a).
- the olive pulp to be separated consists (Figure 2b) of an oil phase (light phase I, direction of flow of the arrows in Fig. 2c, upper figure), a heavy, quasi oil-free solid phase (III, punctured solid sediment in Fig. 2c, lower figure) with Core fragments and de facto oil-free pulp particles, which is why one can speak of a suspension, and a middle phase II (flow direction of the arrows in Fig. 2c, middle figure), a dispersion of the liquids water and oil (small amounts of residual oil) and pulp particles, which, if not destroyed, may have included water and oil. Due to different proportions of water, oil and solid particles, the dispersion phase II is composed of a thinner dispersion phase Ha lying further inside and relative to this thicker dispersion phase Ilb lying further outside (FIG. 2b).
- the segregation elements 19 are of such a length that they protrude into the dispersion phase II. So you do not interfere with the zone I formed on the inside of the screw body from the separated oil (see FIG. 2c). They also do not disturb the outside, quasi oil-free thick, deposited suspension on the inside of the drum wall, that is to say Zone III, since they have the same speed as drum 3.
- the segregation elements 19 in combination with the recesses 27 interfere with the "normal" transport speed of the slurry. This is useful because the solid-bowl screw centrifuge can only separate the free oil as a continuous phase and not in the cells - Closed, as it is in the specifically heavier, the thick suspension (Ilb)
- the thick dispersion phase and, in part, the thin dispersion phase contain a quasi structureless solid, which hardly permits adequate solid-liquid separation.
- the separation elements 19 With the separation elements 19, the structure is now made inhomogeneous, which facilitates the separation of the fluids.
- the segregation elements 19 preferably also project into the area of the thin dispersion. This makes it possible for smaller oil droplets to coincide with the same or larger ones, which means that more oil can coalesce. So the separation elements 19 practically interfere with the laminar
- Fig. 3 illustrates that with the decanter according to the invention, a better yield in olive oil extraction can be achieved in the two-phase technique, with the same or even higher throughputs.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Centrifugal Separators (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10121434 | 2001-05-03 | ||
DE10121434A DE10121434B4 (de) | 2001-05-03 | 2001-05-03 | Vollmantel-Schneckenzentrifuge |
PCT/EP2002/004449 WO2002089992A1 (de) | 2001-05-03 | 2002-04-23 | Vollmantel-schneckenzentrifuge und verfahren zur ölgewinnung mit einer vollmantel-schneckenzentrifuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1383607A1 true EP1383607A1 (de) | 2004-01-28 |
EP1383607B1 EP1383607B1 (de) | 2005-11-09 |
Family
ID=7683442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02737984A Expired - Lifetime EP1383607B1 (de) | 2001-05-03 | 2002-04-23 | Vollmantel-schneckenzentrifuge und verfahren zur ölgewinnung mit einer vollmantel-schneckenzentrifuge |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1383607B1 (de) |
AT (1) | ATE309048T1 (de) |
DE (2) | DE10121434B4 (de) |
WO (1) | WO2002089992A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10123651A1 (de) * | 2001-05-15 | 2002-11-28 | Westfalia Separator Ind Gmbh | Verfahren und Anlage zur Ölgewinnung aus Früchten oder Saaten |
DE102004029394A1 (de) | 2004-06-17 | 2006-01-19 | Westfalia Separator Ag | Spalierobst, insbesondere Beeren- oder Traubenerntefahrzeug und -verfahren |
CN110773330B (zh) * | 2019-11-26 | 2024-10-01 | 巨能机械(中国)有限公司 | 一种压榨挡板结构的卧式螺旋卸料沉降离心机 |
CN114101301B (zh) * | 2021-11-29 | 2022-10-04 | 重庆文理学院 | 一种固废环保处理装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1782428A1 (de) * | 1968-08-30 | 1971-09-02 | Kloeckner Humboldt Deutz Ag | Vollmantel-Schneckenzentrifuge |
DE2627265A1 (de) * | 1976-06-18 | 1977-12-29 | Krauss Maffei Ag | Mehrstufige gegenstrom-wasch- dekantierzentrifuge |
DE3301099A1 (de) * | 1983-01-14 | 1984-12-06 | KHD Humboldt Wedag AG, 5000 Köln | Vorrichtung zur entfeuchtung von schlamm im zentrifugalfeld einer vollmantel-zentrifuge |
DE3318793A1 (de) * | 1983-05-24 | 1985-01-24 | KHD Humboldt Wedag AG, 5000 Köln | Vorrichtung zum entfeuchten von schlamm |
DE4132593A1 (de) * | 1991-09-30 | 1993-04-01 | Linde Kca Dresden Gmbh | Reaktor zur gegenstrombehandlung von feststoff und fluessigkeit |
DE4206006C1 (de) * | 1992-02-27 | 1993-09-16 | Westfalia Separator Ag, 59302 Oelde, De | |
ES2091735T3 (es) * | 1994-09-29 | 1998-02-16 | Nuova Maip Macchine Agric | Procedimiento y aparato para la extraccion centrifuga de aceite de primer y segundo prensado. |
-
2001
- 2001-05-03 DE DE10121434A patent/DE10121434B4/de not_active Expired - Fee Related
-
2002
- 2002-04-23 AT AT02737984T patent/ATE309048T1/de not_active IP Right Cessation
- 2002-04-23 DE DE50204872T patent/DE50204872D1/de not_active Expired - Lifetime
- 2002-04-23 WO PCT/EP2002/004449 patent/WO2002089992A1/de not_active Application Discontinuation
- 2002-04-23 EP EP02737984A patent/EP1383607B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO02089992A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE50204872D1 (de) | 2005-12-15 |
ATE309048T1 (de) | 2005-11-15 |
WO2002089992A1 (de) | 2002-11-14 |
DE10121434B4 (de) | 2004-08-12 |
EP1383607B1 (de) | 2005-11-09 |
DE10121434A1 (de) | 2002-11-14 |
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