EP1680237A2 - Verfahren und einrichtung zur abtrennung artfremder beimengungen aus einem produktstrom - Google Patents
Verfahren und einrichtung zur abtrennung artfremder beimengungen aus einem produktstromInfo
- Publication number
- EP1680237A2 EP1680237A2 EP04791095A EP04791095A EP1680237A2 EP 1680237 A2 EP1680237 A2 EP 1680237A2 EP 04791095 A EP04791095 A EP 04791095A EP 04791095 A EP04791095 A EP 04791095A EP 1680237 A2 EP1680237 A2 EP 1680237A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- conveyor belt
- admixtures
- product stream
- width
- belt conveyor
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/003—Separation of articles by differences in their geometrical form or by difference in their physical properties, e.g. elasticity, compressibility, hardness
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
- A23N12/00—Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts
- A23N12/02—Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts for washing or blanching
- A23N12/023—Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts for washing or blanching for washing potatoes, apples or similarly shaped vegetables or fruit
- A23N12/026—Stone-gatherers or cleaning devices for the washing machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/10—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/10—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects
- B07B13/11—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects involving travel of particles over surfaces which separate by centrifugal force or by relative friction between particles and such surfaces, e.g. helical sorters
- B07B13/116—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects involving travel of particles over surfaces which separate by centrifugal force or by relative friction between particles and such surfaces, e.g. helical sorters stratification of dry granular material on a continuously travelling surface, e.g. belt conveyor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B15/00—Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material
Definitions
- the invention relates to a method and a device for the separation of foreign admixtures from a product stream consisting in particular of steamed or abrasively peeled potatoes or other crops.
- a product stream consisting in particular of steamed or abrasively peeled potatoes or other crops.
- foreign admixtures have to be removed in order to meet the requirements for the purity of the end product and, above all, to prevent serious damage to the processing technology.
- damage occurs, for example, on the knives of cutting devices in the French fries industry if stones get into the fast-running knives. The occurrence of such damage usually results in a longer loss of production as well as time-consuming and costly repairs to the expensive cutting devices.
- a separation of admixtures is carried out in the swim-sink process, for example with water cyclones.
- the differences in the specific weight between crop and admixtures cause the separation effect.
- the separating effect is limited in the case of admixtures with the same or very similar specific weight or with admixtures with an external shape that create a buoyancy in the water flow and paralyze the sinking effect. 3.
- electronic sorting machines are known which are used to sort by color and shape. X-ray systems that use the different penetration damping are also used.
- the separating effect is limited, as there are foreign admixtures that are identical or very similar to the useful product in terms of color, shape and penetration damping, such as pumice, flint, certain types of pebble and limestone as well as long-term woody root pieces.
- the known devices closest to the invention are sorting devices in the fields of agriculture and the food industry.
- a device is known in which a discharge plate is provided in a crop to be sorted in a falling stream, which is controlled by a previous detection device and can thus be sorted into two fractions.
- a similar sorting into two fraction streams is described in DE 27 09 905 A1, in which stones in particular have to be separated from harvested crops and in which a finger unit adjustable in two positions, for example, clears a way for the vertical diarrhea of stones.
- Optoelectronic sorting machines bring a further improvement, as described, for example, in DE 41 27 903. Such expensive machines are mainly used as quality sorting and size sorters for crops such as potatoes, onions or carrots.
- the principle of these selectors is that the products to be read are optoelectronically scanned individually, one after the other in a drop space by, for example, image converters arranged at 120 ° to one another. Products Damaged areas are recognized and, using suitable computer programs, an incorrectly identified product is separated from the material flow, for example by means of an air blast.
- These sorting machines work for example with potatoes with throughput rates of up to 5000 kg / h. However, these machines are not suitable for the quality selection or size sorting of smaller-sized products in view of the throughputs required there.
- the quality sorting of small-sized products is carried out according to the current state of the art in such a way that the products are placed on a conveyor belt at a distance from each other, where they are captured by optoelectronic image converters and at the end of the belt by appropriately controlled selection mechanisms defective products are separated from the crop flow.
- the disadvantages of this approach are manifold. In this way, the products can overlap on the conveyor belt so that damaged products cannot be recognized at all. Products that have been identified as defective can experience a change in position as soon as they are recognized as a result of unsteady conveyor belts, so that they get into a different path and as a result are not discarded.
- Damage points, deflection characteristics, angular momentum or the like are stored in individual, microprocessors or address areas when entering the approach zone and fed to a main coordinate processor, the output signals of which control the stepping motor and thus the separating element with different product-related directions of rotation and acceleration in such a way that a finger of the separating element hits the Product part to be sorted can be accelerated, can be braked briefly at the moment of touching the product part and can be acted upon immediately afterwards with a defined, variable, product-related acceleration.
- a device is somewhat complex for the intended use intended for the present invention and for the throughputs and sorting tasks available here.
- the invention is based on the object of specifying a method and a device for separating foreign admixtures from a product stream, which consists in particular of steamed or abrasively peeled potatoes or other crops, which, at high product throughputs, effectively separates foreign admixtures with a comparatively small amount Enable effort.
- the invention is based on the discovery that, under certain conditions, all typically occurring admixtures of foreign species can be distinguished very clearly from the agricultural useful product in terms of sliding friction. It was found that, in particular in the case of potatoes peeled by steam or abrasive, significant differences in the sliding friction in the ratio of 1: 5 to 1:10 can be detected in comparison to all typically occurring foreign admixtures.
- the essence of the invention is that a product stream containing admixtures is first introduced in a single layer and loosened onto a first moving conveyor belt and a second conveyor belt is arranged after the first conveyor belt at the discharge end, the direction of conveyance of which is determined essentially perpendicular to that of the first conveyor belt, whereby the transport speed of the second conveyor belt compared to the of the first conveyor belt is preferably increased and the width of the first conveyor belt is chosen to be less than the width of the second conveyor belt. Care must be taken to ensure that at least the second conveyor belt is given a certain minimum amount of humidification.
- the separating effect according to the invention can also be observed with conveyor belts running at the same speed, but it is significantly improved and reaches a maximum if the transport speed of the second conveyor belt is increased to that of the first conveyor belt by a factor of 1.2-1.5 , Furthermore, the desired separation effect is increased if a sufficient distance is guaranteed on the second conveyor belt for the reduction of the sliding friction of foreign additives until the transition to static friction for these additives. This is achieved in that the width of the second conveyor belt is selected two to five times larger than the width of the first conveyor belt.
- a prerequisite for achieving the desired goal according to the invention is that a single-layer and loosened occupancy density of the product stream on the first conveyor belt is maintained, which, based on a surface unit of the conveyor belt, does not amount to an area occupied by products and additives of 25% of the surface unit of the first conveyor belt significantly exceeds.
- FIG. 1 shows an embodiment of the device according to the invention with its essential individual components in a side view
- FIG. 2 shows a top view of an embodiment according to FIG. 1
- FIG. 3 shows a special embodiment of a cascade-like arrangement.
- a product stream K which consists of peeled and admixed potato stream, is applied in one layer and loosened to a conveyor belt in the form of a flat belt B- t which moves at speed v 1 .
- the population density of the product stream K on the first conveyor belt B- ⁇ should, based on a surface unit 0 B ⁇ (cf. FIG. 2) of the conveyor belt Bj, be of the order of magnitude an area occupied by products and additives of 25% of a surface unit 0 B ⁇ des Conveyor belt B-, not significantly exceed.
- the product stream is transferred to a downstream second flat belt B 2 , which is essentially offset by 90 degrees and moves at a speed v 2 .
- the flat belt Bi moves at a speed vi between 1 - 2 m / s and the flat belt B 2 with v 2 between 2 - 4 m / s. It is advantageous within the scope of the invention if the speed of the second conveyor belt B 2 is chosen to be greater than that of the first conveyor belt Bi by a factor of 1.2-1.5.
- the width b_ ⁇ of the first conveyor belt Bi less than the width b B2 of the second conveyor belt B 2 .
- the width of the first conveyor belt B- ⁇ was 30 cm and that of the second conveyor belt B 2 was 100 cm
- the foreign proportion of the total product mixture is usually in a range from 0.1 to a maximum of 3%.
- alien admixtures in the order of magnitude of even 10% were completely selected with the device described above with two conveyor belts of the type described.
- the two conveyor belts mentioned form an inclination angle with respect to one another or are arranged with an identical inclination, for example 0 °, to one another. Both bands can run horizontally. It is only necessary to ensure that the products pass from the first to the second belt without being braked. Furthermore, it was found that the second conveyor belt B 2 is to be given a certain minimum amount of humidification. In practice, this results automatically, at least after a certain start-up phase, since the product stream to be cleaned, in the described case of the preparation of steamed or abrasively peeled potatoes, is given up in the moist state.
- the second conveyor belt is to be given a certain minimum amount of humidification, for example by means of a separate spray device (not shown).
- a separate spray device not shown.
- Tests have shown that when the second conveyor belt is kept deliberately dry, it can happen that light stones, for example, spin or stumble when they hit the cross belt and require a longer separation path. If the Cross belt, which was in the prototype test at about 5 ⁇ m water level on the second conveyor belt, this effect can be stopped immediately and the stones hit a 90 degree hook with a very short separation path.
- a deflection unit U see FIG. 3
- the first conveyor belt is inclined at a slight angle of inclination ⁇ out of the plane, but this is not essential for the functionality of the invention.
- FIG. 3 shows a special embodiment of a cascade-like arrangement in supervision.
- three flat strips Bi, B 2 B 3 are used.
- An extension to even more tapes is within the scope of the invention, but does not increase the desired separation effect if the parameters described for this example are observed.
- relatively short conveyor belts are used.
- the transport directions of the product flows and foreign admixtures are indicated by arrows in FIG. 3.
- the second conveyor belt B 2 is assigned a deflection unit U, which also redirects the product stream K -, essentially separated from additives, onto the wider second conveyor belt B 2 in such a way that a lateral one Fractionation of admixtures K 2 and cleaned products K ⁇ causes in the conveying direction of the second conveyor belt B 2 .
- the final separation of the cleaned product flow K- from the admixtures K 2 takes place in the example by means of the third conveyor belt B 3 , as can be seen from FIG. 3.
- the third conveyor belt B 3 There are no gaps between the individual belts described, but rather slight overlaps or height differences, so that, due to the speeds of the belts, the products are each subject to throwing parabolas that the complete transfer of the products to the subsequent conveyor.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Sorting Of Articles (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003152526 DE10352526B4 (de) | 2003-11-05 | 2003-11-05 | Verfahren zur Abtrennung artfremder Beimengungen aus einem Produktstrom |
PCT/EP2004/012342 WO2005049231A2 (de) | 2003-11-05 | 2004-10-30 | Verfahren und einrichtung zur abtrennung artfremder beimengungen aus einem produktstrom |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1680237A2 true EP1680237A2 (de) | 2006-07-19 |
Family
ID=34584968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04791095A Withdrawn EP1680237A2 (de) | 2003-11-05 | 2004-10-30 | Verfahren und einrichtung zur abtrennung artfremder beimengungen aus einem produktstrom |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1680237A2 (de) |
DE (1) | DE10352526B4 (de) |
WO (1) | WO2005049231A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007034446A1 (de) * | 2007-07-20 | 2009-01-22 | Grimme Landmaschinenfabrik Gmbh & Co. Kg | Kartoffelerntemaschine |
FR2922726B1 (fr) * | 2007-10-24 | 2009-12-11 | Ifremer | Dispositif et procede de tri de crevettes. |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1126661B (de) * | 1958-01-03 | 1962-03-29 | Troester A J Fa | Vorrichtung zum Trennen von Steinen, Kluten od. dgl. von Kartoffeln |
GB1453183A (en) * | 1972-11-09 | 1976-10-20 | Davies A W B | Separating devices |
GB1571889A (en) * | 1976-03-11 | 1980-07-23 | Gec Medical Equipment Ltd | Separating apparatus |
FR2353217A1 (fr) * | 1976-06-02 | 1977-12-30 | Bystronic Masch | Procede pour la recolte et le triage des pommes de terre et dispositif selon ce procede |
GB2108871B (en) * | 1981-11-06 | 1985-06-05 | Shell Int Research | Apparatus for classifying catalyst particles and catalytic process employing catalyst particles thus classified |
DE3305369A1 (de) * | 1983-02-17 | 1984-08-23 | Lindemann Maschinenfabrik GmbH, 4000 Düsseldorf | Verfahren und vorrichtung zum sortieren und trennen eines wertstoffgemisches |
DD218055A1 (de) * | 1983-07-28 | 1985-01-30 | Nagema Veb K | Vorrichtung zum aussortieren masshaltiger bonbons |
BE901253A (nl) * | 1984-12-11 | 1985-03-29 | Avr Machinery Pvba | Scheidingsinrichting voor het uit elkaar verwijderen van aardappelen en afval in een aardappelrooimachine. |
IL79276A (en) * | 1986-06-29 | 1991-06-30 | Israel State | Potato combine |
GB8617515D0 (en) * | 1986-07-17 | 1986-08-28 | Miltec Agricultural Ltd | Potato sorting apparatus |
DE4127903C2 (de) * | 1991-08-22 | 1995-08-03 | Weimar Werk Maschinenbau Gmbh | Anordnung und Verfahren zur Qualitäts- und Größensortierung von Produkten und Artikeln |
CA2103752C (en) * | 1992-08-11 | 2004-07-13 | Victor Emul Ross | Particle sorting method |
US5388705A (en) * | 1993-02-26 | 1995-02-14 | Thermedics Detection Inc. | Rejector system for conveyor line |
US5588534A (en) * | 1994-09-30 | 1996-12-31 | Harel; Denis | Garbage separator system |
DE19646753C2 (de) * | 1996-11-01 | 1998-08-20 | Select Ingenieurgesellschaft F | Einrichtung zur Qualitäts- und/oder Größensortierung kleinstückiger Produkte |
US6019297A (en) * | 1998-02-05 | 2000-02-01 | Siemens Automotive Corporation | Non-magnetic shell for welded fuel injector |
US6712220B2 (en) * | 2000-03-16 | 2004-03-30 | Fps Food Processing Systems B.V. | Sorting and packaging products |
-
2003
- 2003-11-05 DE DE2003152526 patent/DE10352526B4/de not_active Expired - Fee Related
-
2004
- 2004-10-30 EP EP04791095A patent/EP1680237A2/de not_active Withdrawn
- 2004-10-30 WO PCT/EP2004/012342 patent/WO2005049231A2/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2005049231A3 * |
Also Published As
Publication number | Publication date |
---|---|
DE10352526B4 (de) | 2005-10-27 |
WO2005049231A2 (de) | 2005-06-02 |
DE10352526A1 (de) | 2005-06-16 |
WO2005049231A3 (de) | 2005-09-29 |
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RIC1 | Information provided on ipc code assigned before grant |
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