NL2028539B1 - Separating system and method for separating seeds from a seeds-pulp mixture - Google Patents

Separating system and method for separating seeds from a seeds-pulp mixture Download PDF

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Publication number
NL2028539B1
NL2028539B1 NL2028539A NL2028539A NL2028539B1 NL 2028539 B1 NL2028539 B1 NL 2028539B1 NL 2028539 A NL2028539 A NL 2028539A NL 2028539 A NL2028539 A NL 2028539A NL 2028539 B1 NL2028539 B1 NL 2028539B1
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NL
Netherlands
Prior art keywords
seeds
outlet
settling
inlet
pulp
Prior art date
Application number
NL2028539A
Other languages
Dutch (nl)
Inventor
Jenneke Colijn Marte
Ruigrok Jan
Original Assignee
Rijk Zwaan Zaadteelt En Zaadhandel Bv
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Priority to NL2028539A priority Critical patent/NL2028539B1/en
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Publication of NL2028539B1 publication Critical patent/NL2028539B1/en

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Classifications

    • 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
    • A23N1/00—Machines or apparatus for extracting juice
    • A23N1/02—Machines or apparatus for extracting juice combined with disintegrating or cutting
    • 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
    • A23N15/00—Machines or apparatus for other treatment of fruits or vegetables for human purposes; Machines or apparatus for topping or skinning flower bulbs
    • A23N15/06—Devices for other treatment of fruit, e.g. marking, maturing, polishing
    • 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
    • A23N5/00—Machines for hulling, husking or cracking nuts
    • A23N5/08—Machines for hulling, husking or cracking nuts for removing fleshy or fibrous hulls of nuts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
    • B03B5/623—Upward current classifiers

Abstract

The present invention relates to a separating system for separating seeds from a seeds-pulp mixture. The present invention further relates to a method for separating seeds from a seeds-pulp 5 mixture. According to the present invention, a moving separating liquid is used in a settling conduit to which a seeds-pulp mixture is added. In this manner, it can be ensured that the separation between seeds and pulp continuously increases With time. More in particular, in systems using a stationary separating liquid, seeds and pulp Will eventually both settle thereby necessitating an 10 action of removing the separating liquid With the (non-settled) pulp from the seeds. FIG. 1 15

Description

Separating system and method for separating seeds from a seeds-pulp mixture The present invention relates to a separating system for separating seeds from a seeds-pulp mixture. The present invention further relates to a method for separating seeds from a seeds-pulp mixture. The system and method according to the present invention could be applied for separating the seeds from fleshy fruits such as tomato, pepper, cucumber, zucchini, and eggplant fruits.
To obtain the seeds of fleshy fruit bearing plants, a process is known in which the fruits of these plants are crushed or smashed into a mixture in which the seeds are released from the pulp and in which the pulp and seeds are separated from the peel.
As a first separating step, the peel is removed from the mixture. As a second step, the water and fine pulp are removed from the mixture leaving a combination of seeds and coarser pulp.
An often used technique to separate the seeds from the coarser pulp is to pour the mixture into a container. Next, water is added to the mixture of seeds and pulp. In practice, the container is tilted to let some of the pulp and water out while allowing the seeds and the remaining pulp, which have settled onto a wall or bottom surface of the container, to remain in the container. Often this process needs to be repeated to fully separate the seeds from the pulp.
The abovementioned process of separating seeds from a seeds-pulp mixture is labor intensive, requires a substantial amount of water, and does not lend itself to be implemented in a continuous system in which a continuous flow of fruits is processed.
An object of the present invention is to provide a separating system for separating seeds from a seeds-pulp mixture in which the abovementioned problems do not occur or at least to a lesser extent.
According to a first aspect of the present invention, this object is achieved using the system of claim 1 which comprises a settling conduit having a first inlet for inserting a seeds-pulp mixture, a second inlet for inserting a separating liquid, a first outlet for outputting seeds of the seeds-pulp mixture, and a second outlet for outputting a pulp mixture comprising pulp of the seeds-pulp mixture and the separating fluid. The system further comprises a separating liquid pumping system for pumping the separating liquid through the settling conduit from the second inlet to the second outlet such that, due to a difference in settling velocity between the pulp and the seeds under the influence of Earth's gravitational field, the seeds of the seeds-pulp mixture will settle near the first outlet and such that the pulp of the seeds-pulp mixture is transported out of the settling conduit via the second outlet by the separating liquid. The system further comprises a seed collecting unit connected to the first outlet and configured for collecting seeds that have settled inside the settling conduit at or near the first outlet. Here, it is noted that the seed collecting unit is configured to prevent or minimize any disturbance of the flow of the separating liquid in the settling conduit when collecting seeds.
The system of the present invention allows for substantially continuous operation in the sense that the seeds-pulp mixture can be continuously added to the settling conduit provided that the seeds that have settled are removed from the settling conduit regularly to prevent too much of an accumulation of the seeds in the settling conduit. Unlike in systems in which a stationary separating liquid is used, by using a moving separating liquid in a settling conduit in accordance with the present invention, it can be ensured that the separation between seeds and pulp continuously increases with time. More in particular, in systems using a stationary separating liquid, seeds and pulp will eventually both settle thereby necessitating an action of removing the separating liquid with the (non-settled) pulp from the seeds.
The settling conduit is preferably configured to be positioned, at least during use, such that it is at least partially but preferably substantially parallel relative to Earth’s gravitational field. Typically, the settling conduit is in the form of a straight cylinder, tube, or pipe having a center axis that is parallel to the gravitational force. In this manner, settling of seeds on the side walls of the settling conduit can be prevented or limited.
The seeds-pulp mixture generally comprises a mixture of a crushing liquid, fruit seeds, and fruit pulp. The crushing liquid is a liquid that was added in a previous separating step. The pulp mixture may therefore comprise the crushing liquid, the fruit pulp, and the separating liquid. lt should be noted that the crushing liquid is most often the same liquid as the separating liquid, and may comprise water.
The first inlet is preferably arranged downstream of the second inlet. In this manner, it can be ensured that all of the seeds-pulp mixture experiences a flow of the separating liquid that is directed towards the second outlet. Additionally or alternatively, the first outlet can be arranged upstream of the second inlet. This facilitates the removal of the settled seeds without disturbing the flow of the separating liquid.
The separating liquid pumping system can be configured to pump the separating liquid such that a flow velocity of the separating liquid in the settling conduit is at least locally greater than a settling velocity of the pulp of the seeds-pulp mixture but smaller than a settling velocity of the seeds of the seeds-pulp mixture. Here, the settling velocity of a seed or pulp is defined as the terminal velocity of a seed or pulp in still separating liquid, respectively. Furthermore, the separating liquid pumping system can be configured to generate a laminar flow of the separating liquid at least a predefined distance from the second inlet. In this case, the first inlet is preferably separated from the second inlet by a distance d that is at least equal to the predefined distance. Put differently, the seeds-pulp mixture is preferably added in the settling conduit at a position at which the flow of the separating liquid is substantially laminar.
Generally, the flow velocity of the separating liquid varies over the cross section of the settling conduit, with a maximum flow velocity typically occurring along a center axis of the settling conduit.
The flow of separating liquid is preferably generated such that the settling velocity of the seeds is higher than the maximum flow velocity of the separating liquid in the settling conduit and that the settling velocity of the pulp is lower than this maximum flow velocity of the separating liquid.
Preferably, the flow of separating liquid is generated such that the settling velocity of the seeds is higher than the maximum flow velocity of the separating liquid in the settling conduit by a predefined threshold.
Increasing the threshold may result in more pulp settling near the inner wall of the settling tube, whereas decreasing the threshold may result in the seeds settling at a decreased rate.
In an exemplary embodiment, the settling velocity of the seeds is between 30 and 100 percent higher than the maximum flow velocity of the separating liquid in the settling conduit.
The seed collecting unit may comprise a collecting chamber having a first opening connected to the first outlet and a second opening for outputting seeds.
The seed collecting unit may further comprise a first valve arranged in between the first opening and the first outlet, and a second valve arranged at the second opening.
Using the first and second valves in combination with the collecting chamber it becomes possible to remove the settled seeds from the settling conduit without substantially altering the flow of the separating liquid in the settling conduit that would otherwise complicate continuous operation.
Furthermore, the collecting system may further comprise a controller for controlling the first valve and the second valve.
This controller may be configured, for the purpose of collecting seeds, to open the first valve with the collecting chamber being substantially emptied and the second valve being closed, to allow seeds that have settled at or near the first outlet to be collected in the collecting chamber, to close the first valve a predetermined amount of time after having opened the first valve or after having detected a predefined filling level of the collecting chamber, and to open the second valve to output the content of the collecting chamber through the second opening.
Instead of an automatic control, a user may manually operate the first and second valves.
Furthermore, the collecting chamber may be connected to a venting channel.
This channel would allow air, which is present in the collecting chamber, to escape through the venting channel during the collecting of seeds from the settling conduit instead of entering the settling conduit.
The separating system may further comprise an output conduit having an inlet and an outlet, wherein the output conduit is configured to receive, at its inlet, the pulp mixture outputted through the second outlet of the settling conduit, and to transport the received pulp mixture from its inlet to its outlet under the influence of Earth’s gravitational field.
A connection between the inlet of the output conduit and the second outlet of the settling conduit is preferably an open connection.
Using an open connection, a more gradual flow of the pulp mixture through the output conduit can be realized.
For example, the output conduit may comprise, at its inlet, a first collector, such as a funnel, arranged relative to the second outlet of the settling conduit such that, during use, the pulp mixture that is outputted by the second outlet of the settling conduit is collected by the first collector, wherein the first collector is exposed to ambient air. For example, the outputted pulp mixture may fall into the funnel of the first collector.
The separating system may further comprise a sieving unit connected to the outlet of the output conduit and configured for separating liquid from the pulp mixture. The sieving unit may comprise a second collector for collecting the pulp mixture at the outlet of the output conduit, and a sieve for sieving for the pulp mixture collected by the second collector thereby separating liquid from the collected pulp mixture. The second collector may form an open connection between the sieving unit and the output conduit. Alternatively, the second collector may form a closed connection allowing pressure inside the pulp mixture to build up upstream of the sieve.
The separated liquid may comprise the separating liquid and the crushing liquid and generally comprises or consists of water. The separating system may further comprise a feedback conduit for transporting the separated liquid back to the separating liquid pumping system allowing the separated liquid to be re-used as separating liquid.
The separating system may further comprise a first feeding conduit having an inlet and an outlet, wherein the outlet of the first feeding conduit is connected to the first inlet of the settling conduit. The separating system may additionally comprise a second feeding conduit having an inlet connected to a source of the seeds-pulp mixture and an outlet connected to the inlet of the first feeding conduit. A connection between the outlet of the second feeding conduit and the inlet of the first feeding conduit can be an open connection that is positioned, at least during use, relative to Earth's gravitational field, above the second outlet of the settling conduit. The positioning of this connection is to ensure that the pulp-seeds mixture is not pushed back into the first feeding conduit by the separating liquid provided that enough mixture is present in the first feeding conduit. Furthermore, the first feeding conduit may comprise, at its inlet, a third collector such as a funnel, arranged relative to the outlet of the second feeding conduit such that during use, the seeds-pulp mixture that is outputted at the output of the second feeding conduit is collected by the third collector, wherein the third collector is exposed to ambient air. During operation, the seeds-pulp mixture may fall from the outlet of the second feeding conduit into the funnel shaped third collector.
The source of the seeds-pulp mixture may comprise a crusher or shredder for crushing one or more fruits, under the addition of the crushing liquid, into the seeds-pulp mixture. This seeds- pulp mixture may comprise a pump for pumping the seeds-pulp mixture into the inlet of the second feeding conduit. This crusher or shredder may form part of the separating system of the present invention.
At least one but preferably all of the settling conduit, the output conduit, the feedback conduit, the first feeding conduit, and the second feeding conduit, may comprise a pipe, tobe, or channel. Furthermore, the separating system may comprise a mounting frame that is configured to be arranged on a supporting surface, wherein at least one of the settling conduit, the output conduit, the feedback conduit, the first feeding conduit, and the second feeding conduit, is mounted to the mounting frame.
5 According to a second aspect, the present invention provides a method for separating seeds from a seeds-pulp mixture, comprising the steps of providing a settling conduit having a first inlet, a second inlet, a first outlet and a second outlet, inserting a seeds-pulp mixture into the settling conduit through the first inlet, pumping a separating liquid through the settling conduit from the second inlet to the second outlet such that, due to a difference in settling velocity between the pulp and the seeds under the influence of Earth’s gravitational field, the seeds of the seeds-pulp mixture will settle near the first outlet and such that the pulp of the seeds-pulp mixture is transported out of the settling conduit via the second outlet by the separating liquid. The method of the present invention further comprises the step of collecting seeds that have settled inside the settling conduit at or near the first outlet.
During the pumping of the separating liquid, a flow velocity of the separating liquid is preferably greater than a settling velocity of the pulp of the seeds-pulp mixture but smaller than a settling velocity of the seeds of the seeds-pulp mixture. Furthermore, during the pumping of the separating liquid, a laminar flow of the separating liquid is generated at least a predefined distance from the second inlet. The first inlet is preferably separated from the second inlet by a distance that 1s at least equal to this predefined distance. In addition, the settling conduit may comprise a center axis, wherein the settling velocity of the seeds, the settling velocity of the pulp, and the flow velocity apply along the center axis at a position at which the flow of the separating liquid is laminar.
Next, the present invention will be described in more detail referring to the appended figures, in which: Figure 1 illustrates an example of a method of separating seeds from a seeds-pulp mixture in accordance with the present invention; Figure 2 illustrates an embodiment of a separating system in accordance with the present invention; and Figure 3 illustrates a process flow corresponding to the separating system of figure 2.
Next, a working principle of the present invention will be described referring to figure 1. As a first step S1, a settling tube is provided having a first inlet, a second inlet, a first outlet and a second outlet. A seeds-pulp mixture is inserted into the settling conduit through the first inlet in step S2. Next, a separating liquid is pumped through the settling conduit from the second inlet to the second outlet in step S3 such that, due to a difference in settling velocity between the pulp and the seeds under the influence of Earth’s gravitational field, the seeds of the seeds-pulp mixture will settle near the first outlet and such that the pulp of the seeds-pulp mixture is transported out of the settling conduit via the second outlet by the separating liquid. As a last step S4, seeds that have settled inside the settling conduit can be collected at or near the first outlet.
Figure 2 illustrates an embodiment of a separating system 1 in accordance with the present invention. System | comprises a settling tube 2 that is provided with a first inlet 3, a second inlet 4, a first outlet 5, and a second outlet 6. First inlet 3 is connected to an outlet 7 of a first feeding tube 8 through which a seeds-pulp mixture is supplied. An inlet 9 of first feeding tube 8 is connected to an outlet 10 of a second feeding tube 11. An inlet 12 of second feeding tube 11 is connected to a source 13 of the seeds-pulp mixture. Source 13 may comprise a shredder or crusher 13A for shredding or crushing fruit into a seeds-pulp mixture. Source 13 may further include a pump 13B for pumping the seeds-pulp mixture into second feeding tube 11. Pump 13B can be controlled by a controller 14.
1t should be noted that source 13 may include a plurality of systems or devices, each responsible for a particular crushing, shredding or sieving step for obtaining the seeds-pulp mixture. Furthermore, these systems or devices may be controlled by a common controller, sach as controller 14.
At its inlet 9, first feeding tube 8 is connected to a funnel shaped collector 9A that captures the seeds-pulp mixture that falls through outlet 10 of second feeding tube 11. In this manner, an open connection is achieved. During operation, a level of the seeds-pulp mixture inside first feeding tube 8 should preferably be kept above second outlet 6 of settling tube 2 as will be explained later.
At its second inlet 4, settling tube 2 receives a separating liquid, preferably water. To this end, a pump 15 is used that receives water from an external water source supplied via tube 16 and/or water that is fed back via sieving unit 17 and feedback tube 19 as will be explained later. To control the flow of water, a valve unit 18 is used to determine which source(s) of water will be used.
Separating system | comprises an output tube 21 that is provided with an inlet 22 and an outlet 23. At its inlet 22, output tube 21 is provided with a funnel shaped collector 24. Pulp mixture that exits outlet 6 of settling tube 2 is collected by collector 24. For example, collector 24 may be provided with an opening in a bottom wall thereof that is coupled to settling tube 2. Side walls of collector 24 may guide the pulp-mixture into output tube 21. Using collector 24, an open connection is obtained between settling tube 2 and output tube 21. Once inside output tube 21, the pulp mixture will move towards outlet 23 under the influence of Earth’s gravitational field.
At outlet 23 of output tube 21, the pulp mixture falls into collector 17A of sieving unit 17.
Also in this manner, an open connection is obtained. Furthermore, a sieve 17B is used for separating liquid from a remainder of the pulp mixture. The separated liquid can be fed back to pump 15 to minimize water consumption during operation. The sieved pulp can be collected and discarded or used for other purposes. At its first outlet 5, settling tube 2 is connected to a seed collecting unit 25. This unit comprises a seed collecting chamber 25B that is provided with a first opening and a second opening. Seeds are collected via the first opening. This opening is connected to first outlet 5 of settling tube 2 via a first valve 25A. Seeds that have been collected in seed collecting chamber 25B can be extracted via the second opening. This opening can be opened and closed using a second valve 25C. Furthermore, second valve 25C may be connected to a seed output tube 26 for exporting the separated seeds. Alternatively, the seeds can be manually collected.
Controller 14 can be configured for controlling first valve 25A, second valve 25C, pump 13B, and pump 15. To this end, various sensors (not shown) may be used. For example, a sensor can be used to determine the level of the seeds-pulp mixture inside first feeding tube 8. If this level is too low, controller 14 may control pump 13B to increase the flow of the seeds-pulp mixture and/or to control pump 15 to change the amount of separating liquid, e.g. water, which is pumped into settling tube 2. A sensor can also be used to determine the amount of seeds that have settled at or near first outlet 15. If the filling level is above a predefined threshold, the controller 14 may operate first valve 25A to allow settled seeds from settling tube 2 to enter seed collecting chamber 25B. Once sufficiently filled, the controller 14 may control first valve 25A to close and second valve 25C to open allowing the collected seeds to be exported, for example via seed output tube
26.
A mounting frame 27 is provided that is configured to be arranged on a supporting surface 28 and to which the various components described above are mounted. For example, figure 2 illustrates an upright 29 of mounting frame 27 that connects, using bars 30, to second feeding tube
11. The connection for the other components of system | has been omitted for clarity.
Next, the operation of system 1 will be described in more detail. Pump 15 pumps separating liquid into settling tube 2. Separating liquid generally comprises water fed via tube 16 or water that has been separated by sieving unit 17. Here, it is noted that the seeds-pulp mixture supplied by source 13 typically also comprises water. This water may be used during the crushing or shredding of the fruit.
The separating liquid that is pumped into settling tube 2 has a flow rate and a flow velocity. The throughput of system 1 can be increased by increasing the flow rate while simultaneously increasing the flow rate of the seeds-pulp mixtare through pump 13B. However, it should be ensured that the flow velocity of the separating liquid is within boundaries.
Firstly, the flow velocity should be not too high so that seeds may settle towards first outlet 5 over time. By increasing the flow velocity, the time required for seeds to settle increases. If the flow velocity is too high, seeds will be outputted through second outlet 6 by the separating liquid.
Secondly, the flow velocity of the separating liquid should not be too low otherwise the pulp from the seeds-pulp mixture will also settle towards first outlet 6 instead of being outputted through second outlet 6.
Thirdly, the flow of the separating liquid should preferably be laminar, at least at a position where the seeds-pulp mixture is introduced into settling tube 2, i.e. at first inlet 3. To this end, first inlet 3 is placed downstream of second inlet 4. More in particular, a separation distance d between inlets 3, 4 is observed that is typically five times the diameter of settling tube 2 or more.
To ensure that the separating liquid does not push back the seeds-pulp mixture in first feeding tube 8, it is preferred that inlet 9 of first feeding tube 8 is positioned above second outlet 6 of settling tube 2. Optionally, the level of the seeds-pulp mixture in first feeding tube 8 may be monitored using a suitable sensor. Based on readings of this sensor, controller 14 may control pump 12 to increase or lower the flow of the seeds-pulp mixture.
Once outputted through second outlet 6, the pulp mixture, i.e. the mixture of the separating liquid and the pulp from the seeds-pulp mixture, is transported to sieving unit 17 via output tube 21 {5 under the influence of Earth's gravitational field. In sieving unit 17, the pulp mixture will be sieved. More in particular, liquid from the pulp mixture will be separated from the pulp. This liquid can be fed back via feedback tabe 19 and pump 15 towards settling tube 2. The separated pulp may be discarded either manually or via a dedicated tube (not shown) that is optionally provided with a pump (not shown).
The connection between various tubes may be an open connection, i.e. in connection with ambient air. This applies to the connection between settling tube 2 and output tube 21, between second feeding tube 11 and first feeding tube 8, and between output tube 21 and sieving unit 17. By having open connections, the generation of under-pressure or over-pressure inside the tubes can be minimized that would have otherwise disturbed the flow of the seeds-pulp mixture, the pulp- mixture, or the separating liquid.
Once a sufficient amount of seeds has settled near first outlet 5, controller 14 will operate first valve 25A to allow seeds to transfer to seed collecting chamber 258. The control of first valve 25A can be time-based, in which case first valve 25A is operated at regular time intervals, or the control can be sensor-based. In this latter case, a sensor (not shown) is used to determine an amount of settled seeds inside settling tube 2. Once this amount exceeds predefined threshold, first valve 25A can be operated.
By using a seed collecting chamber 25B that is relatively small compared to settling tube 2, and by keeping second valve 25C closed, it can be ensured that the transfer of seeds from settling tube 2 to seed collecting chamber 25B does not significantly alter the flow of the separating liquid inside settling tube 2.
After a predetermined amount of time, first valve 25A is closed by controller 14. Also here, a sensor-based control may be used in which a sensor (not shown) monitors the filling level of the seed collecting chamber 25B, and in which controller 14 controls first valve 25A and second valve 25C based on the output of this sensor.
After closing first valve 254, second valve 25C can be opened by controller 14 allowing the seeds inside seed collecting chamber 25B to be collected. This can be done by manually collecting the seeds or by transporting the seeds via an output tube 26, optionally using a pump {not shown).
In the embodiment above, settling tube 2 is arranged vertically, i.e. parallel to Earth’s gravitational force F,. When arranged in an inclined manner relative to this force, seeds will also move towards the side walls of settling tube 2. This may result in an undesired accumulation of seeds and is therefore preferably avoided.
According to the present invention, the separating liquid has a flow direction that is at least partially opposite to the force that causes the seeds and pulp to settle, e.g. the gravitational force.
By ensuring a sufficiently high flow velocity of the separating liquid, the seeds and pulp can be separated from each other.
Furthermore, settling tube 2, output tube 21, feedback tube 19, first feeding tube 8, and second feeding tube 11, may be embodied as a tube, cylinder, pipe, or any other type of conduit for transporting the seeds-pulp mixture, pulp mixture, or separating liquid.
Figure 3 illustrates a process flow corresponding to the separating system of figure 2. As shown, a source outputs a seeds-pulp mixture (A), which source may comprise a crusher or shredder 13A for crushing fruit, under the addition of a crushing liquid, into seeds-pulp mixture (A). A pump 13B pumps seeds-pulp mixture (A) into settling conduit 2. In addition, a separating liquid (D) is supplied to settling conduit 2 via separating liquid pumping system 15.
At a first outlet of settling conduit 2, a combination {C) of seeds and separating liquid is collected by seed collecting unit 25. From this combination, separating liquid (D) may be extracted and fed back to separating liquid pumping system 15.
At a second outlet of settling conduit 2, a combination (D) of pulp and separating liquid is outputted. Sieving unit 17 sieves combination (D) and separates the pulp (E) from the separating liquid. The latter is then fed back to separating liquid pumping system 15, whereas pulp (E) can be collected in a pulp container 31.
In the above, the present invention has been explained using embodiments thereof. However, it should be noted that the present invention is not limited to these embodiments but that various modifications are possible without deviating from the scope of the present invention that is defined by the appended claims.
It should be noted that according to the present invention, some pulp may settle together with the seeds.
However, even in this case, due to the repeated collecting of the seeds, accumulation of pulp in the settling conduit can be prevented.

Claims (28)

CONCLUSIESCONCLUSIONS 1. Scheidingssysteem (1) voor het scheiden van zaden van een zaden-pulpmengsel, omvattende: een bezinkingsleiding (2) die een eerste inlaat (3) heeft voor het invoeren van een zaad- pulpmengsel, een tweede inlaat (4) voor het invoeren van een scheidingsvloeistof, een eerste uitlaat (5) voor het uitvoeren van zaden van het zaden-pulpmengsel, en een tweede uitlaat (6) voor het uitvoeren van een pulpmengsel dat pulp van het zadenpulpmengsel en de scheidingsvloeistof omvat; een scheidingsvloeistof-pompsysteem {15) voor het door de bezinkingsleiding pompen van de scheidingsvloeistof van de tweede inlaat naar de tweede uitlaat zodanig dat, door een verschil in bezinkingssnelheid tussen de pulp en de zaden onder de invloed van het zwaartekrachtveld van de aarde, de zaden van het zaden-pulpmengsel zullen bezinken nabij de eerste uitlaat en zodanig dat de pulp van het zaden-pulpmengsel wordt vervoerd uit de bezinkingsleiding via de tweede uitlaat door de scheidingsvloeistof; en een zaadverzameleenheid (25) die is verbonden met de eerste uitlaat en die is ingericht voor het verzamelen van zaden die zijn bezonken in de bezinkingsleiding bij of nabij de eerste uitlaat.A separation system (1) for separating seeds from a seed-pulp mixture, comprising: a settling line (2) having a first inlet (3) for introducing a seed-pulp mixture, a second inlet (4) for introducing of a separation fluid, a first outlet (5) for outputting seeds of the seed-pulp mixture, and a second outlet (6) for outputting a pulp mixture comprising pulp of the seed-pulp mixture and the separation fluid; a separation liquid pumping system {15) for pumping the separation liquid through the settling line from the second inlet to the second outlet in such a way that, due to a difference in settling speed between the pulp and the seeds under the influence of the gravity field of the earth, the seeds of the seed-pulp mixture will settle near the first outlet and such that the pulp of the seed-pulp mixture is carried from the settling line through the second outlet by the separation fluid; and a seed collection unit (25) connected to the first outlet and arranged to collect seeds settled in the settling line at or near the first outlet. 2. Scheidingssysteem volgens conclusie 1, waarbij de bezinkingsleiding is ingericht om zodanig te zijn gepositioneerd, althans tijdens gebruik, dat deze ten minste gedeeltelijk maar bij voorkeur hoofdzakelijk parallel is aan het zwaartekrachtveld van de aarde.A separation system according to claim 1, wherein the settling line is arranged to be positioned, at least during use, to be at least partly but preferably substantially parallel to the earth's gravitational field. 3. Scheidingssysteem volgens een van de vorige conclusies, waarbij het zaden- pulpmengsel een mengsel omvat van een vermorzelvloeistof, fruitzaden en fruitpulp, en waarbij het pulpmengsel de vermorzelvloeistof, de fruitpulp en de scheidingsvloeistof omvat.A separation system according to any one of the preceding claims, wherein the seed-pulp mixture comprises a mixture of a crushing liquid, fruit seeds and fruit pulp, and wherein the pulp mixture comprises the crushing liquid, the fruit pulp and the separation liquid. 4. Scheidingssysteem volgens conclusie 3, waarbij de vermorzelvloeistof dezelfde is als de scheidingsvloeistof, bij voorkeur water.A separation system according to claim 3, wherein the crushing liquid is the same as the separating liquid, preferably water. 5. Scheidingssysteem volgens een van de vorige conclusies, waarbij de eerste inlaat stroomafwaarts van de tweede inlaat is geplaatst.A separation system according to any one of the preceding claims, wherein the first inlet is located downstream of the second inlet. 6. Scheidingssysteem volgens een van de vorige conclusies, waarbij de eerste uitlaat stroomopwaarts van de tweede inlaat is geplaatst.A separation system according to any one of the preceding claims, wherein the first outlet is located upstream of the second inlet. 7. Scheidingssysteem volgens een van de vorige conclusies, waarbij het scheidingsvloeistof-pompsysteem is ingericht om de scheidingsvloeistof zodanig te pompen dat een stroomsnelheid van de scheidingsvloeistof ten minste lokaal hoger is dan een bezinkingssnelheid van de pulp van het zaden-pulpmengsel maar lager dan een bezinkingssnelheid van de zaden van het zaden-pulpmengsel.A separation system according to any one of the preceding claims, wherein the separation liquid pumping system is adapted to pump the separation liquid such that a flow rate of the separation liquid is at least locally higher than a sedimentation rate of the pulp of the seed-pulp mixture but lower than a sedimentation rate of the seeds of the seed-pulp mixture. 8. Scheidingssysteem volgens conclusie 7, waarbij het scheidingsvloeistof-pompsysteem is ingericht voor het ten minste op een voorgedefiniëerde afstand van de tweede inlaat genereren van een gelaagde stroom van de scheidingsvloeistof.8. Separation system according to claim 7, wherein the separation liquid pump system is adapted to generate a layered flow of the separation liquid at least at a predefined distance from the second inlet. 9. Scheidingssysteem volgens conclusie 8, waarbij de eerste inlaat wordt gescheiden van de tweede inlaat door een afstand d die ten minste gelijk is aan de voorgedefiniëerde afstand.A separation system according to claim 8, wherein the first inlet is separated from the second inlet by a distance d at least equal to the predefined distance. 10. Scheidingssysteem volgens een van de conclusies 7-9, waarbij de stroom scheidingsvloeistof zodanig wordt gegenereerd dat de bezinkingssnelheid van de zaden hoger is dan de maximale stroomsnelheid van de scheidingsvloeistof in de bezinkingsleiding, bij meer voorkeur waarbij de bezinkingssnelheid van de zaden tussen 30 en 100 procent hoger is dan de maximale stroomsnelheid van de scheidingsvloeistof in de bezinkingsleiding.Separation system according to any one of claims 7-9, wherein the flow of separation liquid is generated such that the settling rate of the seeds is higher than the maximum flow rate of the separating liquid in the settling line, more preferably wherein the settling rate of the seeds is between 30 and 100 percent higher than the maximum flow rate of the separating fluid in the settling line. 11. Scheidingssysteem volgens een van de vorige conclusies, waarbij de zaadverzameleenheid omvat: een verzamelkamer (25A) die een eerste opening heeft die is verbonden met de eerste uitlaat en een tweede opening voor het uitvoeren van zaden; een eerste klep (25B) die is geplaatst tussen de eerste opening en de eerste uitlaat; een tweede klep (25C) die is geplaatst bij de tweede opening.A separation system according to any one of the preceding claims, wherein the seed collection unit comprises: a collection chamber (25A) having a first opening connected to the first outlet and a second opening for discharging seeds; a first valve (25B) disposed between the first opening and the first outlet; a second valve (25C) located at the second opening. 12. Scheidingssysteem volgens conclusie 11, waarbij het verzamelsysteem verder een regelaar (14) omvat voor het regelen van de eerste klep en de tweede klep, waarbij die regelaar is ingericht, met het doel van het verzamelen van zaden, voor: het openen van de eerste klep waarbij de verzamelkamer hoofdzakelijk is geleegd en de tweede klep is gesloten; het in de verzamelkamer verzameld laten worden van zaden die bij of nabij de eerste uitlaat zijn bezonken;A separation system according to claim 11, wherein the collection system further comprises a controller (14) for controlling the first valve and the second valve, said controller being adapted, for the purpose of collecting seeds, to: open the first valve with the collection chamber substantially emptied and the second valve closed; allowing seeds settled at or near the first outlet to be collected in the collecting chamber; het sluiten van de eerste klep een vooraf bepaalde hoeveelheid tijd na het hebben geopend van de eerste klep of na het hebben gedetecteerd van een vooraf gedefinieerd vulniveau van de verzamelkamer; en het openen van de tweede klep voor het uitvoeren van de inhoud van de verzamelkamer door de tweede opening.closing the first valve a predetermined amount of time after opening the first valve or after detecting a predefined filling level of the collection chamber; and opening the second valve to discharge the contents of the collection chamber through the second opening. 13. Scheidingssysteem volgens cen van de vorige conclusies, verder omvattende cen uitvoerleiding (21) die een inlaat (22) en een uitlaat (23) heeft, waarbij de uitvoerleiding is ingericht voor het, bij diens inlaat, ontvangen van het pulpmengsel dat wordt uitgevoerd door de 19 tweede uitlaat van de bezinkingsleiding, en om het ontvangen pulpmengsel te vervoeren van diens inlaat naar diens uitlaat onder de invloed van het zwaartekrachtveld van de aarde.A separation system according to any one of the preceding claims, further comprising an output conduit (21) having an inlet (22) and an outlet (23), the output conduit being adapted to receive, at its inlet, the pulp mixture being output through the 19 second outlet of the settling line, and to transport the received pulp mixture from its inlet to its outlet under the influence of the earth's gravitational field. 14. Scheidingssysteem volgens conclusie 13, waarbij een verbinding tussen de inlaat van de uitvoerleiding en de tweede uitlaat van de bezinkingsleiding een open verbinding is.The separation system of claim 13, wherein a connection between the inlet of the output line and the second outlet of the settling line is an open connection. 15. Scheidingssysteem volgens conclusie 14, waarbij de uitvoerleiding, bij diens inlaat, een eerste verzamelaar omvat, zoals een (rechter (24), die ten opzichte van de tweede uitlaat van de bezinkingsleiding zodanig is geplaatst dat, tijdens gebruik, het pulpmengsel dat wordt uitgevoerd door de tweede uitlaat van de bezinkingsleiding wordt verzameld door de eerste verzamelaar, waarbij de eerste verzamelaar is blootgesteld aan omgevingslucht.A separation system according to claim 14, wherein the output conduit includes, at its inlet, a first collector, such as a judge (24), positioned relative to the second outlet of the settling conduit so that, in use, the pulp mixture being output from the second outlet of the settling line is collected by the first collector, the first collector being exposed to ambient air. 16, Scheidingssysteem volgens een van de conclusies 13-15, verder omvattende een zeefeenheid (17) die is verbonden met de uitlaat van de uitvoerleiding en die is ingericht voor het scheiden van vloeistof van het pulpmengsel, waarbij de zeefeenheid bij voorkeur een tweede verzamelaar (17A) omvat voor het verzamelen van het pulpmengsel bij de uitlaat van de uitvoerleiding, en een zeef {17B) voor het zeven van het pulpmengsel dat is verzameld door de tweede verzamelaar en het daardoor scheiden van vloeistof van het verzamelde pulpmengsel, waarbij de tweede verzamelaar bij voorkeur een open verbinding vormt tussen de zeefeenheid en de uitvoerleiding.Separation system according to any one of claims 13-15, further comprising a screen unit (17) connected to the outlet of the output conduit and arranged for separating liquid from the pulp mixture, the screen unit preferably comprising a second collector ( 17A) for collecting the pulp mixture at the outlet of the output line, and a sieve {17B) for sieving the pulp mixture collected by the second collector and thereby separating liquid from the collected pulp mixture, the second collector preferably forms an open connection between the screen unit and the output conduit. 17. Scheidingssysteem volgens conclusie 16, verder omvattende een terugkoppelleiding (19) voor het vervoeren van de gescheiden vloeistof terug naar het scheidingsvloeistof- pompsysteem, wat mogelijk maakt dat de gescheiden vloeistof wordt hergebruikt als scheidingsvloeistof.The separation system of claim 16, further comprising a feedback line (19) for conveying the separated liquid back to the separation liquid pumping system, enabling the separated liquid to be reused as a separation liquid. 18. Scheidingssysteem volgens een van de vorige conclusies, verder omvattende: een eerste toevoerleiding (8) die een inlaat (9) en een uitlaat (7) heeft, waarbij de uitlaat van de eerste toevoerleiding is verbonden met de eerste inlaat van de bezinkingsleiding; een tweede toevoerleiding (11) die een inlaat (12) heeft welke verbonden is met een bron (13) van het zaden-pulpmengsel en een uitlaat (10) die is verbonden met de inlaat van de eerste toevoerleiding; waarbij een verbinding tussen de uitlaat van de tweede toevoerleiding en de inlaat van de eerste toevoerleiding een open verbinding is die, tenminste tijdens gebruik, ten opzichte van het zwaartekrachtveld van de aarde boven de tweede uitlaat van de bezinkingsleiding is gepositioneerd.A separation system according to any one of the preceding claims, further comprising: a first supply line (8) having an inlet (9) and an outlet (7), the outlet of the first supply line being connected to the first inlet of the settling line; a second feed line (11) having an inlet (12) connected to a source (13) of the seed-pulp mixture and an outlet (10) connected to the inlet of the first feed line; wherein a connection between the outlet of the second supply line and the inlet of the first supply line is an open connection positioned, at least during use, relative to the Earth's gravity field above the second outlet of the settling line. 19. Scheidingssysteem volgens conclusie 18, waarbij de eerste toevoerleiding, bij diens inlaat, een derde verzamelaar (9A) omvat, zoals een trechter, die ten opzichte van de uitlaat van de tweede toevoerleiding zodanig is geplaatst dat tijdens gebruik het zaden-pulpmengsel dat wordt uitgevoerd bij de uitvoer van de tweede toevoerleiding wordt verzameld door de derde verzamelaar, waarbij de derde verzamelaar is blootgesteld aan omgevingslucht.Separation system according to claim 18, in which the first feed line comprises, at its inlet, a third collector (9A), such as a funnel, which is positioned relative to the outlet of the second feed line in such a way that during use the seed-pulp mixture that is performed at the outlet of the second supply line is collected by the third collector, the third collector being exposed to ambient air. 20. Scheidingssysteem volgens een van de conclusies 18-19 en conclusie 3, waarbij de bron van het zaden-pulpmengsel een vermorzeleenheid of versnippereenheid (13A) omvat voor het vermorzelen van fruit, onder de toevoeging van de vermorzelvloeistof, in het genoemde zaden- pulpmengsel.A separation system according to any one of claims 18-19 and claim 3, wherein the source of the seed-pulp mixture comprises a crushing unit or shredding unit (13A) for crushing fruit, with the addition of the crushing liquid, in said seed-pulp mixture . 21. Scheidingssysteem volgens conclusie 20, waarbij de bron van het zaden-pulpmengsel een pomp omvat voor het in de inlaat van de tweede toevoerleiding pompen van het zaden- pulpmengsel.The separation system of claim 20, wherein the seed-pulp mixture source comprises a pump for pumping the seed-pulp mixture into the inlet of the second feed line. 22. Scheidingssysteem volgens een van de vorige conclusies, waarbij ten minste één uit de bezinkingsleiding, de uitvoerleiding, de terugkoppelleiding, de eerste toevoerleiding en de tweede toevoerleiding een pijp, buis of kanaal omvat.A separation system according to any one of the preceding claims, wherein at least one of the settling line, the output line, the feedback line, the first supply line and the second supply line comprises a pipe, tube or channel. 23. Scheidingssysteem volgens conclusie 22, verder omvattende een montageframe dat is ingericht om op een ondersteunend oppervlak te worden geplaatst, waarbij ten minste één uit de bezinkingsleiding, de uitvoerleiding, de terugkoppelleiding, de eerste toevoerleiding en de tweede toevoerleiding op het montageframe is gemonteerd.The separation system of claim 22, further comprising a mounting frame adapted to be placed on a supporting surface, wherein at least one of the settling line, the output line, the feedback line, the first supply line and the second supply line is mounted on the mounting frame. 24. Werkwijze voor het scheiden van zaden van een zaden-pulpmengsel, omvattende: het verschaffen van een bezinkingsleiding die cen eerste inlaat, een tweede inlaat, een eerste uitlaat en een tweede uitlaat heeft; het door de eerste inlaat invoeren van een zaden-pulpmengsel in de bezinkingsleiding; het zodanig van de tweede inlaat naar de tweede uitlaat door de bezinkingsleiding pompen van een scheidingsvloeistof dat, door een verschil in bezinkingssnelheid tussen de pulp en de zaden onder invloed van het zwaartekrachtveld van de aarde, de zaden van het zaden-pulpmengsel zuilen bezinken nabij de eerste uitlaat en dat de pulp van het zaden-pulpmengsel door de scheidingsvloeistof via de tweede uitlaat uit de bezinkingsleiding wordt vervoerd; en het bij of nabij de eerste uitlaat verzamelen van zaden die zijn bezonken in de bezinkingsleiding.A method of separating seeds from a seed-pulp mixture, comprising: providing a settling line having a first inlet, a second inlet, a first outlet and a second outlet; introducing a seed-pulp mixture into the settling line through the first inlet; pumping a separation fluid from the second inlet to the second outlet through the settling line in such a way that, due to a difference in settling speed between the pulp and the seeds under the influence of the earth's gravitational field, the seeds of the seed-pulp mixture settle near the first outlet and that the pulp of the seed-pulp mixture is carried by the separation fluid through the second outlet out of the settling line; and collecting seeds settled in the settling line at or near the first outlet. 25. Werkwijze volgens conclusie 24, waarbij een stroomsnelheid van de scheidingsvloeistof tijdens het pompen van de scheidingsvloeistof hoger is dan een bezinkingssnelheid van de pulp van het zaden-pulpmengsel maar lager dan een bezinkingssnelheid van de zaden van het zaden-pulpmengsel.The method of claim 24, wherein a flow rate of the separation fluid during pumping of the separation fluid is higher than a settling rate of the pulp of the seed-pulp mixture but lower than a settling rate of the seeds of the seed-pulp mixture. 26. Werkwijze volgens conclusie 25, waarbij er tijdens het pompen van de scheidingsvloeistof een laminaire stroming van de scheidingsvloeistof ten minste op een vooraf gedefinieerde afstand van de tweede inlaat wordt gegenereerd.The method of claim 25, wherein a laminar flow of the separation fluid is generated at least at a predefined distance from the second inlet during pumping of the separation fluid. 27. Werkwijze volgens conclusie 26, waarbij de eerste inlaat wordt gescheiden van de tweede inlaat door een afstand die ten minste gelijk is aan de vooraf gedefinieerde afstand.The method of claim 26, wherein the first inlet is separated from the second inlet by a distance at least equal to the predefined distance. 28. Werkwijze volgens conclusie 27, waarbij de bezinkingsleiding een centrale as omvat, waarbij de genoemde bezinkingssnelheid van de zaden, genoemde bezinkingssnelheid van de pulp, en de genoemde stroomsnelheid van toepassing zijn langs de centrale as op een positie op welke de stroming van de scheidingsvloeistof laminair is.The method of claim 27, wherein the settling conduit includes a central axis, said seed settling rate, said pulp settling rate, and said flow rate applying along the center axis at a position at which the flow of the separation fluid is laminar.
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US6988622B1 (en) * 2003-04-22 2006-01-24 Curry Seed And Chili Co. Venturi-driven flotation separator for chili peppers
WO2013069028A1 (en) * 2011-11-09 2013-05-16 Council Of Scientific & Industrial Research Method and apparatus for the separation of seeds from fruit pulp/slurry/pomace
CN105363548A (en) * 2015-11-30 2016-03-02 新疆西部牧业股份有限公司 Skin and seed separator and skin and seed separation method

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Publication number Priority date Publication date Assignee Title
US3567017A (en) * 1967-08-03 1971-03-02 Robert L Hughes Flotation separatins apparatus and method
US3430764A (en) * 1967-10-31 1969-03-04 Moody Dunbar Inc Flotation separator for pepper cores and meats
US6988622B1 (en) * 2003-04-22 2006-01-24 Curry Seed And Chili Co. Venturi-driven flotation separator for chili peppers
WO2013069028A1 (en) * 2011-11-09 2013-05-16 Council Of Scientific & Industrial Research Method and apparatus for the separation of seeds from fruit pulp/slurry/pomace
CN105363548A (en) * 2015-11-30 2016-03-02 新疆西部牧业股份有限公司 Skin and seed separator and skin and seed separation method

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