NL2012878B1 - Device for drying harvested soft commodities at the harvesting site. - Google Patents

Device for drying harvested soft commodities at the harvesting site. Download PDF

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Publication number
NL2012878B1
NL2012878B1 NL2012878A NL2012878A NL2012878B1 NL 2012878 B1 NL2012878 B1 NL 2012878B1 NL 2012878 A NL2012878 A NL 2012878A NL 2012878 A NL2012878 A NL 2012878A NL 2012878 B1 NL2012878 B1 NL 2012878B1
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NL
Netherlands
Prior art keywords
rotatable drum
air
foregoing
heat exchanger
raw materials
Prior art date
Application number
NL2012878A
Other languages
Dutch (nl)
Inventor
Christiaan Holthausen Robert
Original Assignee
Christiaan Holthausen Robert
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Application filed by Christiaan Holthausen Robert filed Critical Christiaan Holthausen Robert
Priority to NL2012878A priority Critical patent/NL2012878B1/en
Application granted granted Critical
Publication of NL2012878B1 publication Critical patent/NL2012878B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/30—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotary or oscillating containers; with movement performed by rotary floors
    • F26B17/32—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotary or oscillating containers; with movement performed by rotary floors the movement being in a horizontal or slightly inclined plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B19/00—Machines or apparatus for drying solid materials or objects not covered by groups F26B9/00 - F26B17/00
    • F26B19/005—Self-contained mobile devices, e.g. for agricultural produce
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/04—Agitating, stirring, or scraping devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/14—Chambers, containers, receptacles of simple construction
    • F26B25/16—Chambers, containers, receptacles of simple construction mainly closed, e.g. drum

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The present invention relates to a device for drying harvested soft commodities, such as coffee berries, at the harvesting site, comprising a rotatable drum provided with meshes connected to rotating means, one or more fans for supplying air to the rotatable drum and/or for circulating the air contained in the rotatable drum and a source of heat for heating the air supplied to the rotatable drum and/or for heating the circulated air contained in the rotatable drum. The rotating means and the one or more fans are arranged for connecting to a voltage source arranged for supplying a direct-current voltage of 60 volt or lower. The present invention further relates to a method for drying harvested soft commodities, such as coffee berries, at the harvesting site.

Description

Device for drying harvested soft commodities at the harvesting site
The present invention relates to a device for drying harvested soft commodities at the harvesting site. The present invention further relates to method for drying harvested soft commodities at the harvesting site.
The soft commodity markets, i.e. markets made up of commodities such as coffee, tea, cocoa and sugar, are characterized by fluctuations in yield of harvested soft commodities and quality of the harvested soft commodities and consequently fluctuations in price, i.e. fluctuations in income for the farmer who cultivates the traded soft commodities. Nowadays, after the farmer has harvested ripe soft commodities, such as coffee berries, the commodities are dried in the sun on plastic sheets or concrete surfaces to a moisture-content of about 23%. Next, the dried commodities, such as dried coffee berries, are hulled and the raw materials, such as coffee beans, are sold, either directly or indirectly, to the soft commodity processor/exporter.
The process of providing high quality soft commodities is highly depend on the weather conditions applicable at the harvesting site. Not only the growth crops producing the soft commodities is determined by the weather conditions, also the further processing of the harvested soft commodities depends on the weather. As already mentioned above the harvested soft commodities are dried in the sun and therefore, the weather determines whether or not the farmer is able to dry the raw material properly and is able to start delivering raw materials to the soft commodity processor/exporter. The drying step of the soft commodities is the critical step for the farmer to earn a stable income, since the final price to be paid for the soft commodities is determined by the processor/exporter of the soft commodity by deductions which highly depend on the moisture-content of the soft commodity.
Therefore, in case the farmer is able to dry the harvested soft commodities in an efficient, predictable and measurable manner, the farmer is able to deliver a soft commodity having a reduced moisture-content, which will result in reduced deductions in price made by the processor/exporter of the soft commodity. Even further in case the farmer is able to dry its harvested soft commodity immediately after harvesting the soft commodity, the famer is able to keep the harvested dried soft commodities on stock for a prolonged period of time.
The present invention provides hereto a device for drying harvested soft commodities, such as coffee berries, at the harvesting site, comprising a rotatable drum provided with meshes connected to rotating means, one or more fans for supplying air to the rotatable drum and/or for circulating the air contained in the rotatable drum and a source of heat for heating the air supplied to the rotatable drum and/or for heating the circulated air contained in the rotatable drum, wherein the rotating means and the one or more fans are arranged for connecting to a voltage source arranged for supplying a direct-current voltage of 60 volt or lower.
It is noted that the harvesting sites of soft commodities are not easily accessible and are mainly located upcountry. By providing a device according to the present invention, the farmer cultivating soft commodities is able to dry the harvested soft commodities, regardless of the weather conditions and without the need of installing a complex installation powered by a high voltage source. In other words, the device of the present invention provides a device which can be easily assembled by the farmer himself and which device is arranged to be in compliance with the limited facilities, such as power supply facilities, available to the farmer at the harvesting site. The simple construction of the device of the present invention and low voltage source required for using the device of the present invention enables any farmer cultivating soft commodities to assemble and use the device of the present invention at the harvesting site.
The phrase ‘at the harvesting site’ as used herein has to be interpreted as being a location directly located on or located by the harvesting site, i.e. the location where the soft commodity is cultivated and harvested. However, it has to be understood that the phrase ‘at the harvesting site’ may further include the ‘farmers site’, e.g. a central place where the farmer collects and dries the harvested soft commodity directly after harvesting.
The rotating means as used in the device according to the present invention may comprise one or more rollers, e.g. wheels, connected to the rotatable drum for rotating the rotatable drum. Preferably the one or more rollers are placed on the outside of the rotatable drum in order to maximize the inner volume of the rotatable drum and to avoid soft commodities from being trapped between the roller and the inner surface of the rotatable drum preventing the soft commodities of being pulverized and to prevent jamming of the device. The one or more rollers may be connected via a driving belt to a electric motor. Either the one or more rollers may be connected to the voltage source arranged for supplying a direct-current voltage of 60 volt or lower or the electric motor may be connected to the voltage source arranged for supplying a direct-current voltage of 60 volt or lower. The electric motor may be located in the device.
The rotatable drum may be made from a simple mesh plate, e.g. a flexible perforated metal sheet. Preferably, the mesh size of the meshes provided in the rotatable drum does not exceed the desired size of the soft commodities to be obtained. It is noted that the mesh size of the meshes provided in the rotatable drum may exceed the size of a part of the soft commodities supplied to the device according to the present invention. By defining the mesh size, the farmer is able to select the minimal required size of the soft commodities to be obtained.
It is further noted that the mesh size of the meshes provided in the rotatable drum may be selected such that the meshes are arranged for discharging contaminations contained in the harvested soft commodities, such as soil material and/or crop residues. During the harvesting of soft commodities other matter, i.e. contaminations or foreign matter, such as sand, dust, stones, twigs or the like may be contained in the harvested soft commodities. Since the contaminations will reduce the quality of the harvested soft commodities and therefore result in a deduction of the price to be paid for the delivered harvested soft commodities, it is desirable that most of the contaminations is removed from the harvested soft commodities during drying.
By providing a well-chosen mesh size balance resulting in a desired size of the soft commodities to be obtained and the removal of as many of the contaminations from the soft commodities to be obtained, the farmer is able to provide a high quality dried and purified soft commodity product. For example, to obtain a high quality dried and purified coffee cherry product, a rotatable drum having a mesh size of about 5 mm is preferred.
In an embodiment of the device of the present invention, the rotatable drum is provided with at least one opening for locating a source of heat in the rotatable drum. The source of heat may be located anywhere in the device according to the present invention as long as the source of heat is able to heat the air supplied to the rotatable drum and/or to heat the circulated air contained in the rotatable drum. By locating the source of heat in the rotatable drum a more efficient method of heating the circulated air, and consequently the air supplied to the rotatable drum is obtained. Furthermore, by locating the source of heat in the rotatable drum, the farmer is better able to control the air temperature in the rotatable drum.
The rotatable drum may be rotatable at a rotational speed of about 5 revolutions per minute. Although the rotatable drum may be rotatable at any rotation speed, a low rotating speed, e.g. about 5 revolutions per minute, is preferred to constantly move the soft commodities to be dried through the drum in order to get an uniform drying result.
The device according to the present invention may further comprise a housing being arranged for at least enclosing the rotatable drum. The housing protects any individual from coming to close to the rotatable drum and therefore avoid dangerous situations in case the device is in operation, i.e. the rotatable drum is being rotated. Other components, e.g. the rotating means and/or source of heat may be enclosed by the housing as well.
In an embodiment of the device of the present invention, the housing may be arranged for supplying and discharging of the harvested soft commodities and/or for removing or exchanging the rotatable drum. By providing an inlet for supplying the harvested soft commodities and an outlet for discharging the harvested soft commodities the housing may fully enclose the rotatable drum. The housing may be arranged for removing or exchanging the rotatable drum in order to clean the rotatable drum enclosed by the housing or to install a different rotatable drum, e.g. an already cleaned drum or a drum having a different mesh size.
In a further embodiment of the device of the present invention, the housing comprises insulating material, e.g. a heat insulation material, such as a thermic insulant, to prevent leakage of heat generated in the device. Also the housing may comprise a recess located on the bottom of the device to collect any contaminants, e.g. foreign matter, separated from the soft commodities contained in the rotatable drum.
In order to refresh the air contained in the device the housing may be provided with one or more controllable vents for supplying air to the device and/or discharging air from the device. The one or more controllable vents enables the operator of the device, e.g. the farmer, to control the temperature and/or humidity of the air contained in the rotatable drum.
In another embodiment of the device of the present invention, the device may further comprises different type of sensors. For example, the device of the present invention may comprise a temperature sensor and/or a humidity sensor. Preferably, the sensors are connected to a display for displaying measured process data, e.g. temperature and humidity. Based on the displayed information, the operator of the device is able to adapt the process condition in the device in case needed.
The rotatable drum comprises in the device of the present invention is arranged for drying any amount of harvested soft commodities to be dried. Preferably, the rotatable drum is arranged for drying of an amount not exceeding 100 kg harvested soft commodities. By providing a rotatable drum that is arranged for drying of an amount not exceeding 100 kg harvested soft commodities the device of the present invention is easily transportable, however, still having sufficient capacity of harvested soft commodities to be dried. The dimensions of the rotatable drum of the present invention may be variable, as long as the dimensions are selected such that the farmer/operator is still able to transport the device of the present invention in difficult accessible areas, i.e. the locations of harvesting soft commodities. For example, the rotatable drum has a length of about 100 cm to about 150 cm, e.g. about 110 cm, and a diameter of about 50 cm to about 75 cm, e.g. about 60 cm.
In an embodiment of the device of the present invention, besides the rotating means and the one or more fans, also the source of heat may be arranged for connecting to a voltage source arranged for supplying a direct-current voltage of 60 volt or lower and/or the source of the source of heat is arranged for cooperating with another source of energy, such as a heating system, preferably a biogas system. By providing a source of heat that is able to function on different sources of energy, i.e. a voltage source or heating system, the operator of the device is enabled to use the device of the present invention at any time, regardless the available resources for running the device.
The source of heat may preferable comprise a heat exchanger, such as a heat exchanger coil. The heat exchanger may extend in the longitudinal direction of the axis of the rotatable drum in order to provide an optimum source of heat and an efficient way heating the air circulated in the rotatable drum.
In case a heat exchanger is used as a source of heat, the heat exchanger is preferably arranged for flowing a liquid, such as water, through the heat exchanger. The liquid flowing through the heat exchanger may be supplied by a liquid container, such as a water tank, which heat exchanger is connected via one or more insulated conduits to the liquid container. The liquid contained in the liquid container may be heated by a natural energy source, such as the sun, or by using another source of energy, such as a heating system, preferably a biogas system, or an electrical heating system, preferably an electric hotplate. In case an electric hotplate is used it is preferred that the electric hotplate is arranged for connecting to a voltage source arranged for supplying a direct-current voltage of 60 volt or lower.
Furthermore, the heat exchanger may be connected to a liquid pump, which liquid pump is arranged for connecting to a voltage source arranged for supplying a direct-current voltage of 60 volt or lower. The liquid pump enables the liquid to flow through the heat exchanger. Preferably, the flow rate of the liquid flowing through the heat exchanger is about 2 litres per minute to obtain the most efficient heating of the air contained in the device at a relatively low flow rate.
The voltage source of the present invention may comprise a photovoltaic cell, such as a solar cell, and/or one or more batteries connected in series. In a preferred embodiment of the present invention, the voltage source comprises a rechargeable battery, such as an accumulator. By providing two rechargeable batteries, the operator of the device of the present invention is able to operate to device using the first rechargeable battery, while at the same time the second rechargeable battery is recharged. Preferably the rechargeable battery is arranged for connecting to a photovoltaic cell, such as a solar cell, for recharging the rechargeable battery.
It is further noted that the voltage source may be arranged for supplying a direct-current voltage of 50 volt or lower, preferably 25 volt or lower, more preferably 15 volt or lower. In a particular embodiment of the device of the present invention, the voltage source is arranged for supplying a direct-current of about 48 volt, about 24 volt or about 12 volt. By providing a device wherein the voltage source is arranged for supplying a direct-current of about 12 volt, a safe and well-functioning device is provided for drying harvested soft commodities at the harvesting site. In order to increase the safety of the device even further, the device of the present invention is provided with an earthing system and fuses to prevent dangerous situations in case of wet weather conditions.
It is further noted that the device of the present invention as described above may have a total power consumption of not higher than about 15 ampere. By providing such a device the rechargeable battery used for providing power to the device is able to function for a sufficiently long period of time.
In another aspect, the invention provides a method for drying harvested soft commodities, such as coffee berries, at the harvesting site, comprising the steps of: a) providing harvested soft commodities; b) supplying the harvested soft commodities provided in step a) to a rotatable drum of the device according to any of the preceding claims; c) drying the harvested soft commodities provided in step a) by simultaneously performing the following processing steps: rotating the rotating means connected to the rotatable drum; supplying air to the rotatable drum and/or circulating air contained in the rotatable drum; heating the air supplied to the rotatable drum and/or the air contained in the rotatable drum; and d) discharging the dried soft commodities from the device.
In a preferred embodiment the rotatable drum rotates at a low rotational speed, e.g. a rotational speed of about 5 revolutions per minute, to provide a continuous movement of the soft commodities in the rotatable drum in order to provide an uniform drying result and/or a more efficient separation of the soft commodities and the contaminants, e.g. foreign matter, contained therein.
It is further noted that the air to be supplied to the rotatable drum and/or the air contained in the rotatable drum is preferable heated up to, but not exceeding, a temperature of about 60°C. By providing a device wherein the air is heated up to about 60°C, i.e. about 60°C or lower, the soft commodities to be dried are not overly dried. Since overly dried soft commodities are considered to be of less quality, excessively drying of the soft commodities needs to be prevented.
In an embodiment of the method of the present invention, a heat exchanger is used for heating the air to be supplied to the rotatable drum and/or for heating the air contained in the rotatable drum, which heat exchanger is arranged for flowing a liquid, such as water, through the heat exchanger, wherein the liquid is heated by means of solar thermal energy and/or a gas burner, preferably comprising a biogas. In such an embodiment the liquid flowing through the heat exchanger is preferably heated up to a temperature of about 80°C in order to obtain a maximum air temperature in the rotatable drum of about 60°C.
The present invention will be further elucidated on the basis of the non-limitative exemplary embodiments shown in the following figures. Herein: figure 1 shows a schematic front view of the device according to the invention, and figure 2 shows a perspective view of the device according to the invention.
Figure 1 shows a schematic front view of the device 1 according to the present invention. The device 1 comprises a housing 2 enclosing a rotatable drum 3 (since the rotatable drum 3 is not visible from the outside, the drum 3 is represented by dotted lines). The harvested soft commodities 4, such as coffee cherries, may be supplied to the rotatable drum 3 via inlet 5. The inlet 5 comprises an outer part 5a and an inner part 5b (represented by the dotted lines) for easily supplying the soft commodities 4 to the interior of the rotatable drum 3. The housing 2 further comprises an outlet 6 comprising an outer part 6a and an inner part 6b for the discharge of dried soft commodities 4 without the need of opening the housing 2 first. The housing 2 comprises vents 7 for supplying air to the device 1 and discharging air from the device 1. Furthermore, a drainage system 8 is provided, such as a recessed part in the housing 2, to collect foreign matter contained in the harvested soft commodities 4. It is further noted that the housing comprises two parts, an upper part 2a and a lower part 2b. The upper part 2a is provided with a handle 9 to raise to upper part 2a to access the rotatable drum 3.
Figure 1 further shows an electric motor 10 (represented by the dotted lines) enclosed by the housing 2 comprising a wheel 11, e.g. a roller. The wheel 11 is connected to the rotatable drum 3 in order to rotate the drum 3 once the electric motor 10 is activated. The electric motor 10 may be connected to a power supply source (not shown), such as a voltage source. Furthermore, the rotatable drum 3 encloses a heat exchanger coil 12 (represented by the dotted lines), which heat exchanger coil 12 is connected to a water reservoir 14 via insulated conduits 13. The water contained in the water reservoir 14 is kept at a constant temperature of about 80°C using a hotplate 15.
Figure 2 shows a perspective view of the device 1 of the present invention. The housing 2 is in opened position, i.e. upper part 2a is lifted (using handle 9) such that an opening is provided between the upper part 2a and lower part 2b. In the opened position as shown in figure 2, the operator 17 is able to access the rotatable drum 3. The operator 17 is now able to clean the interior of the device 1 or to replace the rotatable drum 3 by another drum (not shown).
Figure 2 further pictures the heat exchanger coil 12 located in the interior of the rotatable drum 3. Furthermore, the drum 3 comprises an opening 11 which can be closed during operation of the device 1 and opened during discharging of the dried harvested soft commodities 4. In case the opening 11 is in open position and the opening 11 is aligned with the outlet 6, the soft commodities 4 can be easily discharged from the device 1.

Claims (29)

1. Inrichting voor het op locatie van oogst drogen van geoogste landbouwgrondstoffen, zoals koffiebessen, omvattende: een met roteermiddelen verbonden roteerbare trommel voorzien van mazen; een of meerdere waaiers voor het aan de roteerbare trommel toevoeren van lucht en/of het laten circuleren van de in de roteerbare trommel reeds bevindende lucht; en een warmtebron voor het verwarmen van de aan de roteerbare trommel toe te voeren lucht en/of de in de roteerbare trommel reeds bevindende lucht, met het kenmerk dat de roteermiddelen en de een of meerdere waaiers zijn ingericht voor aansluiting op een spanningsbron ingericht voor het leveren van een gelijkspanning van 60 volt of lager.A device for drying harvested agricultural raw materials, such as coffee berries, on location of harvest, comprising: a rotatable drum with meshes connected to rotating means; one or more impellers for supplying air to the rotatable drum and / or circulating the air already present in the rotatable drum; and a heat source for heating the air to be supplied to the rotatable drum and / or the air already present in the rotatable drum, characterized in that the rotating means and the one or more impellers are adapted for connection to a voltage source adapted for supplying a DC voltage of 60 volts or lower. 2. Inrichting volgens conclusie 1, met het kenmerk dat de roteermiddelen een of meerdere met de roteerbare trommel verbonden walsen omvat ingericht voor het roteren van de roteerbare trommel.Device as claimed in claim 1, characterized in that the rotating means comprise one or more rollers connected to the rotatable drum and adapted for rotating the rotatable drum. 3. Inrichting volgens conclusie 1 of 2, met het kenmerk dat de maasgrootte van de in de roteerbare trommel voorziene mazen de gewenste grootte van de te verkrijgen gedroogde geoogste landbouwgrondstoffen niet overschrijdt.Device as claimed in claim 1 or 2, characterized in that the mesh size of the meshes provided in the rotatable drum does not exceed the desired size of the dried harvested agricultural raw materials to be obtained. 4. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de maasgrootte van de in de roteerbare trommel voorziene mazen dusdanig gekozen is dat de mazen zijn ingericht voor het doorlaten van zich in de geoogste landbouwgrondstoffen bevindende verontreinigingen, zoals bodemmateriaal en/of ongewenste gewasresten.4. Device as claimed in any of the foregoing claims, characterized in that the mesh size of the meshes provided in the rotatable drum is chosen such that the meshes are adapted to allow contaminants, such as soil material and / or unwanted crop residues, to be present in the harvested agricultural raw materials. . 5. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de roteerbare trommel is voorzien van ten minste één opening voor het in de roteerbare trommel plaatsen van een warmtebron.Device as claimed in any of the foregoing claims, characterized in that the rotatable drum is provided with at least one opening for placing a heat source in the rotatable drum. 6. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de roteerbare trommel roteerbaar is met een toerental van ongeveer 5 omwentelingen per minuut.Device as claimed in any of the foregoing claims, characterized in that the rotatable drum is rotatable at a speed of approximately 5 revolutions per minute. 7. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de inrichting een omhulsel omvat ingericht voor het ten minste omhullen van de roteerbare trommel.Device as claimed in any of the foregoing claims, characterized in that the device comprises an envelope adapted for at least enclosing the rotatable drum. 8. Inrichting volgens conclusie 7, met het kenmerk dat het omhulsel is ingericht voor het toe- en afvoeren van de geoogste landbouwgrondstoffen en/of het verwijderen, danwel verwisselen, van de roteerbare trommel.Device as claimed in claim 7, characterized in that the casing is adapted for supplying and discharging the harvested agricultural raw materials and / or removing, or exchanging, the rotatable drum. 9. Inrichting volgens conclusie 7 of 8, met het kenmerk dat het omhulsel isolatiemateriaal omvat.Device according to claim 7 or 8, characterized in that the envelope comprises insulating material. 10. Inrichting volgens één der conclusies 7-9, met het kenmerk dat het omhulsel is voorzien van een of meerdere regelbare ventilatieopeningen voor het toevoeren van lucht aan de inrichting en/of het afvoeren van lucht uit de inrichting.Device as claimed in any of the claims 7-9, characterized in that the casing is provided with one or more controllable ventilation openings for supplying air to the device and / or extracting air from the device. 11. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de inrichting verder een temperatuur- en/of luchtvochtigheidssensor omvat.Device as claimed in any of the foregoing claims, characterized in that the device further comprises a temperature and / or air humidity sensor. 12. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de roteerbare trommel is ingericht voor het drogen van ten hoogste ongeveer 100 kg geoogste landbouwgrondstoffen.Device as claimed in any of the foregoing claims, characterized in that the rotatable drum is adapted to dry at most about 100 kg of harvested agricultural raw materials. 13. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de warmtebron is ingericht voor aansluiting op een spanningsbron ingericht voor het leveren van een gelijkspanning van 60 volt of lager en/of de warmtebron is ingericht voor samenwerking met een ander type energiebron, zoals een verwarmingsinstallatie, bij voorkeur een biogasinstallatie.Device as claimed in any of the foregoing claims, characterized in that the heat source is adapted for connection to a voltage source adapted to supply a direct voltage of 60 volts or lower and / or the heat source is adapted for cooperation with another type of energy source, such as a heating installation, preferably a biogas installation. 14. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de warmtebron een warmtewisselaar, zoals een warmtewisselaar spiraal, omvat.Device as claimed in any of the foregoing claims, characterized in that the heat source comprises a heat exchanger, such as a heat exchanger coil. 15. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de warmtebron zich uitstrekt in de lengterichting van de as van de roteerbare trommel.Device as claimed in any of the foregoing claims, characterized in that the heat source extends in the longitudinal direction of the axis of the rotatable drum. 16. Inrichting volgens conclusie 14 of 15, met het kenmerk dat de warmtewisselaar is ingericht voor het door de warmtewisselaar laten stromen van een vloeistof, zoals water.Device as claimed in claim 14 or 15, characterized in that the heat exchanger is arranged for flowing a liquid, such as water, through the heat exchanger. 17. Inrichting volgens één der conclusies 14-16, met het kenmerk dat de warmtewisselaar is verbonden door middel van een of meerdere geïsoleerde leidingen met een vloeistofreservoir, zoals een waterreservoir.Device as claimed in any of the claims 14-16, characterized in that the heat exchanger is connected by means of one or more insulated pipes to a liquid reservoir, such as a water reservoir. 18. Inrichting volgens één der conclusies 14-17, met het kenmerk dat de warmtewisselaar is verbonden met een vloeistofpomp, welke vloeistofpomp is ingericht voor aansluiting op een spanningsbron ingericht voor het leveren van een gelijkspanning van 60 volt of lager.Device as claimed in any of the claims 14-17, characterized in that the heat exchanger is connected to a liquid pump, which liquid pump is adapted for connection to a voltage source adapted to supply a direct voltage of 60 volts or lower. 19. Inrichting volgens één der conclusies 16-18, met het kenmerk dat het debiet van de door de warmtewisselaar stromende vloeistof ongeveer 2 liter per minuut bedraagt.Device as claimed in any of the claims 16-18, characterized in that the flow rate of the liquid flowing through the heat exchanger is approximately 2 liters per minute. 20. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de spanningsbron een fotovoltaïsche cel, zoals een zonnecel, en/of een of meerdere in serie geschakelde batterijen omvat.Device as claimed in any of the foregoing claims, characterized in that the voltage source comprises a photovoltaic cell, such as a solar cell, and / or one or more batteries connected in series. 21. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de spanningsbron een oplaadbare batterij, zoals een accu, omvat.Device as claimed in any of the foregoing claims, characterized in that the voltage source comprises a rechargeable battery, such as a battery. 22. Inrichting volgens conclusie 21, met het kenmerk dat de oplaadbare batterij is ingericht voor aansluiting op een fotovoltaïsche cel, zoals een zonnecel, voor het opladen van de oplaadbare batterij.Device as claimed in claim 21, characterized in that the rechargeable battery is adapted for connection to a photovoltaic cell, such as a solar cell, for charging the rechargeable battery. 23. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de spanningsbron is ingericht voor het leveren van een gelijkspanning van 50 volt of lager, bij voorkeur 25 volt of lager, bij meer voorkeur 15 volt of lager.Device as claimed in any of the foregoing claims, characterized in that the voltage source is adapted to supply a direct voltage of 50 volts or lower, preferably 25 volts or lower, more preferably 15 volts or lower. 24. Inrichting volgens één der voorgaande conclusies, met het kenmerk dat de spanningsbron is ingericht voor het leveren van een gelijkspanning van ongeveer 48 volt, ongeveer 24 volt of ongeveer 12 volt.Device as claimed in any of the foregoing claims, characterized in that the voltage source is adapted to supply a direct voltage of approximately 48 volts, approximately 24 volts or approximately 12 volts. 25. Werkwijze voor het op locatie van oogst drogen van geoogste landbouwgrondstoffen, zoals koffiebessen, omvattende de stappen: a) het verschaffen van geoogste landbouwgrondstoffen; b) het toevoeren van de in stap a) verschafte landbouwgrondstoffen aan een roteerbare trommel van de inrichting volgens één der voorgaande conclusies; c) het drogen van de in stap a) verschafte landbouwgrondstoffen door het tegelijkertijd uitvoeren van de volgende bewerkingstappen: het roteren van de met de roteerbare trommel verbonden roteermiddelen; het aan de roteerbare trommel toevoeren van lucht en/of het laten circuleren van de in de roteerbare trommel reeds bevindende lucht; het verwarmen van de aan de roteerbare trommel toe te voeren lucht en/of de in de roteerbare trommel reeds bevindende lucht; en d) het verwijderen van de gedroogde landbouwgrondstoffen uit de inrichting.A method for drying harvested agricultural raw materials, such as coffee berries, on location of harvest, comprising the steps of: a) providing harvested agricultural raw materials; b) supplying the agricultural raw materials provided in step a) to a rotatable drum of the device according to any one of the preceding claims; c) drying the agricultural raw materials provided in step a) by simultaneously performing the following processing steps: rotating the rotating means connected to the rotatable drum; supplying air to the rotatable drum and / or circulating the air already present in the rotatable drum; heating the air to be supplied to the rotatable drum and / or the air already present in the rotatable drum; and d) removing the dried agricultural raw materials from the establishment. 26. Werkwijze volgens conclusie 25, met het kenmerk dat de roteerbare trommel roteert met een toerental van ongeveer 5 omwentelingen per minuut.A method according to claim 25, characterized in that the rotatable drum rotates at a speed of approximately 5 revolutions per minute. 27. Werkwijze volgens conclusie 25 of 26, met het kenmerk dat de aan de roteerbare trommel toe te voeren lucht en/of de in de roteerbare trommel reeds bevindende lucht wordt verwarmd tot een temperatuur van ten hoogste ongeveer 60°C.A method according to claim 25 or 26, characterized in that the air to be supplied to the rotatable drum and / or the air already present in the rotatable drum is heated to a temperature of at most about 60 ° C. 28. Werkwijze volgens één der conclusies 25-27, met het kenmerk dat voor het verwarmen van de aan de roteerbare trommel toe te voeren lucht en/of de in de roteerbare trommel reeds bevindende lucht een warmtewisselaar wordt gebruikt ingericht voor het door de warmtewisselaar laten stromen van een vloeistof, zoals water, waarbij de vloeistof door middel van thermische zonne-energie en/of een gasbrander, bij voorkeur omvattende een biogas, wordt verwarmd.A method according to any one of claims 25-27, characterized in that for heating the air to be supplied to the rotatable drum and / or the air already present in the rotatable drum, a heat exchanger is used for allowing the heat exchanger to pass through flows of a liquid, such as water, wherein the liquid is heated by means of solar thermal energy and / or a gas burner, preferably comprising a biogas. 29. Werkwijze volgens conclusie 28, met het kenmerk dat de door de warmtewisselaar stromende vloeistof wordt verwarmd tot een temperatuur van ten hoogste ongeveer 80°C.A method according to claim 28, characterized in that the liquid flowing through the heat exchanger is heated to a temperature of at most approximately 80 ° C.
NL2012878A 2014-05-23 2014-05-23 Device for drying harvested soft commodities at the harvesting site. NL2012878B1 (en)

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Publication number Priority date Publication date Assignee Title
DE2638446A1 (en) * 1976-08-26 1978-03-02 Hauni Werke Koerber & Co Kg TOBACCO DRYERS
US6279462B1 (en) * 2001-02-13 2001-08-28 Gwan-Hee Kim Electric barbecuing cooker
JP2002130946A (en) * 2000-10-19 2002-05-09 Terada Seisakusho Co Ltd Aerating rotary dryer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2638446A1 (en) * 1976-08-26 1978-03-02 Hauni Werke Koerber & Co Kg TOBACCO DRYERS
JP2002130946A (en) * 2000-10-19 2002-05-09 Terada Seisakusho Co Ltd Aerating rotary dryer
US6279462B1 (en) * 2001-02-13 2001-08-28 Gwan-Hee Kim Electric barbecuing cooker

Non-Patent Citations (2)

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Title
ANONYMOUS: "Homeroasters.org - Discussion Forum: Drum roaster in glass tube", 26 June 2012 (2012-06-26), XP055164720, Retrieved from the Internet <URL:http://www.homeroasters.org/php/forum/viewthread.php?thread_id=2779> [retrieved on 20150126] *
ANONYMOUS: "Sweet Maria's Web Forum - View topic - Please introduce your homebuilt or modified roaster", 31 October 2011 (2011-10-31), XP055164695, Retrieved from the Internet <URL:http://www.sweetmariascoffee.com/forum/viewtopic.php?f=14&t=196&start=40> [retrieved on 20150126] *

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