EP2854498A1 - Procédé et dispositif de désinfection de produits coulants, de préférence de semences, au moyen de lumière ultraviolette (rayonnement uv) - Google Patents

Procédé et dispositif de désinfection de produits coulants, de préférence de semences, au moyen de lumière ultraviolette (rayonnement uv)

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Publication number
EP2854498A1
EP2854498A1 EP13727125.0A EP13727125A EP2854498A1 EP 2854498 A1 EP2854498 A1 EP 2854498A1 EP 13727125 A EP13727125 A EP 13727125A EP 2854498 A1 EP2854498 A1 EP 2854498A1
Authority
EP
European Patent Office
Prior art keywords
product
guide channel
radiation
particles
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13727125.0A
Other languages
German (de)
English (en)
Inventor
Mathias Kotte
Olaf Röder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonta-Service GmbH
Original Assignee
Evonta-Service GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Evonta-Service GmbH filed Critical Evonta-Service GmbH
Publication of EP2854498A1 publication Critical patent/EP2854498A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
    • A01C1/08—Immunising seed

Definitions

  • UV radiation ultraviolet light
  • the invention relates to a method and a device for disinfecting free-flowing products with ultraviolet light (UV radiation).
  • Free-flowing are all granular products, also referred to as bulk materials, powders or granules to understand products that can be transported in a continuous stream and separated.
  • the preferred field of application of the invention is the treatment of plant seeds or seeds by killing and inactivating the microorganisms and animal pests which predominantly settle on the surface and in and under the seed coat of the products or are conveyed separately with the product stream.
  • Various methods and the corresponding devices for the treatment of bulk material with UV radiation and other wavelengths of ionizing radiation are known.
  • DE 10 2004 050 493 describes a device in which free-flowing material is led past ultraviolet light sources over the transport path.
  • the product passes oblique planes, which are designed as cascades and allow a change between the transport on the inclined plane and free fall paths.
  • the particles of the product stream should be turned over and rearranged.
  • a major disadvantage of this device is that the product in the cascade must be turned several times to apply all the surface areas of the particles with ultraviolet radiation. As a result, sensitive goods such. As seed, damaged by mechanical action and reduced in quality. This limits the application of the device to mechanically insensitive products.
  • Another disadvantage is the inhomogeneous energy transfer to products of different grain size, grain shape and surface finish, since the residence time of the particles in the ultraviolet radiation varies by adjusting different speeds. To roll z. For example, round particles rapidly descend the inclined plane, while flat particles slip more slowly, even under the influence of imprinted mechanical vibration.
  • devices for the treatment of free-flowing vegetable products by means of UV energy, electron energy or microwave energy are known in which the product is isolated in a chamber in a fluidized bed and the radiation energy is exposed (DE 20 2006 015 636 U1).
  • a counter to gravity directed gas flow causes at least temporary levitation and a permanent change in position of the particles.
  • a major disadvantage of such devices with process control in the fluidized bed is that the particles of the bulk material are accelerated downwards by the action of gravity, but by the upwardly directed gas flow of the fluidized bed, a flow resistance acts, the particles depending on their size, density , Shape and surface texture up to different levels. It may happen that the light particles are blown up quickly, while heavy particles remain in the lower part of the chamber. The resulting often significant speed difference and duration of residence of different particles leads to very different exposure times of the energy and thus to a broad dispersion of the absorbed dose in the bulk material. This can lead to insufficient absorbed dose of individual particles with too low a disinfection dose or to overdoses with a corresponding loss of quality.
  • the fluidized bed is only partially suitable for the continuous transport of large volume flows and thereby causes a considerable energy expenditure.
  • Disinfestation devices are also known in which the product is transported in rotatable drums or by means of screws (DE 10 2009 055 731, US 2004/005 270 2).
  • the UV radiation sources are located either remote from the product over the drum or screw or close to the product in the lower area.
  • a significant shortcoming of the method according to WO 2004/095 953 is that the generation and maintenance of the vacuum in the process chamber requires a very high evacuation effort, since air and water vapor are continuously introduced into the process chamber with the product.
  • the decisive disadvantage is that the generation and application of accelerated electrons produces interfering X-ray radiation, which can certainly be shielded against leakage into the environment, but is often rated as critical in the perception of the population.
  • Another disadvantage of these methods is that quality losses can occur if the products are exposed too long in the area of the X-ray radiation. When applied to seeds, this may damage the embryo, reducing germination or causing genetic alterations.
  • the invention has for its object to provide a method and an associated device that allow flowing products regardless of the size distribution of the particles and their density, shape and surface finish without evacuation of the process chamber with great homogeneity of the energy input to the individual particles and their to treat the entire surface in such a way that the energy dose required to safely kill the microorganisms and insects is reached on each surface element and quality degradation or genetic modification of the product due to excessive absorbed dose or / and transmission of an X-ray dose is avoided.
  • the aim is to kill harmful microorganisms and insects by the treatment with UV radiation, which settle on the surface and in a boundary layer of the particles to a depth of about 500 ⁇ .
  • the object is achieved by the method according to claim 1.
  • the subject of claim 15 is a device suitable for carrying out the method. Particularly advantageous embodiments are described in the dependent claims.
  • the flow of the free-flowing product is first transported by means of a conveyor into a process chamber, wherein preferably already takes place a mechanical pre-separation of the particles.
  • This has the advantage that even with large product throughputs, the particles are sufficiently separated and fed to the process chamber with negligible coverage.
  • the areas of product feed and discharge are shielded against the escape of UV radiation.
  • the product supply and removal is carried out by suitable conveyors, such as vibrating conveyor troughs, high-speed belts or rotary valves. In combination with a suitable shielding against UV radiation, this allows a continuous material flow while preventing the escape of UV radiation.
  • the product guide channel is connected to a gas delivery device, preferably a gas blower, which generates a constant gas volume flow within the product guide channel in the fall direction of the product flow. It forms a vertical downward, in the transport direction, guided in the gas flow volume particle flow.
  • a gas delivery device preferably a gas blower
  • the positive or negative pressure is not so great that special Schleusungsoder pressure resistance measures are necessary, but means a significant deviation from the atmospheric pressure.
  • the pressure build-up is possible in particular because the supply or discharge devices for the product represent a considerable flow resistance against incoming or outgoing air.
  • air is sucked in and introduced into the upper end of the product guide channel. At the bottom, the air is expelled. These are located at the bottom and / or top of the product guide channel Gas conveyors.
  • a gas delivery device which is arranged at the upper end of the product guide channel, there is an overpressure inside the process chamber. If the gas delivery device is arranged at the lower end of the product guide channel, the gas is sucked out of it and there is negative pressure. If a gas delivery device is provided both at the lower end and at the upper end of the product guide channel, overpressure prevails in the upper part of the product guide channel and in the lower negative pressure.
  • the associated openings are advantageously provided with devices that prevent leakage of the product. These are preferably gratings, sieves, gauze, perforated sheets or UV-transparent materials such as plastic films or quartz glass, preferably in conjunction with associated cleaning devices.
  • an ozone catalyst precedes, which reduces the ozone generated in certain types of UV sources from oxygen in the treatment zone and preferably degrades to an acceptable level.
  • the gas flow from the gas conveyor is circulated by being deflected at the lower end of the product guide channel back to its upper end.
  • the gas conveying device is preferably arranged between the discharge of the gas stream at the lower end of the product guide channel and the supply at the upper end.
  • a particularly preferred embodiment provides a cleaning device for the diverted gas stream. This cleaning device removes dust from the gas stream and prevents its accumulation in the circulating gas stream.
  • the cleaning device is preferably designed as a filter (bag filter), cyclone or similar device according to the prior art.
  • the removal of the gas stream through a protective grid which is preferably cleaned automatically or manually, closed against the suction or blowing larger particles.
  • losses of gas resulting from the discharge via the product feed or removal are possibly compensated by further gas conveying devices, by a supplementary feed from gas tanks or by suction devices from the atmosphere.
  • a further preferred embodiment provides for a plurality of gas delivery devices, which are arranged at the lower and / or upper end of the product guide channel.
  • the gas stream is preferably formed by air, nitrogen or carbon dioxide. Preference is given to inert gases which do not undergo unintentional chemical reactions with the products.
  • a particularly preferred embodiment provides for the addition of treatment gases that cause intended chemical or biological reactions in or on the particles.
  • the gas stream and / or the product is water or Supplied steam and heated in a particularly preferred embodiment, the gas stream and / or the product additionally.
  • the action of water and / or heat advantageously increases the effect of UV radiation against microorganisms and insects.
  • a further preferred embodiment is the wetting of the surface of the particles of the product before and / or during the feed into the product guide channel with an aqueous sodium hypochlorite solution and particularly preferably with an aqueous hydrogen peroxide solution.
  • aqueous sodium hypochlorite solution and particularly preferably with an aqueous hydrogen peroxide solution.
  • concentration of hydrogen peroxide or sodium hypochlorite in the reactive solution is preferably in the range of 0.3% to 30%, more preferably in the range of 3% to 10% and most preferably in the range of 5% to 8%.
  • the duration of exposure of the reactive solutions to the exposure of the product in the UV radiation is chosen so that the reactive solution can penetrate deep enough into the surface of the product particles and entrained germs, spores and insects, but without the product in its Quality affecting.
  • the exposure time is preferably in the range from 1 s to 1000 s, particularly preferably in the range from 2 s to 100 s and very particularly preferably in the range from 3 s to 10 s.
  • the product is heated before and / or during delivery to the product guide channel.
  • known devices such as infrared radiators, heated contact surfaces or hot air blower are used.
  • the surface temperature of the product is preferably in the range of 30 ° C to 80 ° C, more preferably in the range of 35 ° C to 70 ° C and most preferably in the range of 40 ° C to 65 ° C.
  • the product is cooled to ambient temperature by use of known devices, such as cooled contact surfaces or convection cooling with air.
  • the holding time at the maximum temperature is preferably in the range from 1 s to 1000 s, more preferably in the range from 2 s to 100 s and most preferably in the range from 3 s to 10 s.
  • the cross section of the product guide channel decreases downwards, in the fall direction of the product flow, continuously.
  • the so-formed cross section of the product guide channel accelerates the gas flow to approximately the same extent as the product flow, whereby the velocity of the surrounding gas at each point substantially matches that of the accelerated particles in the case.
  • the guidance of the product flow takes place by means of an accelerated gas flow whose movement in magnitude and direction corresponds to the accelerated movement which the particles falling in it carry out due to the gravitational acceleration. Air friction, as occurs in known solutions to the gas atmosphere is thus excluded or at least negligible and all Particles of a bulk flow have approximately the same speed. Also, speed differences, such as those arising during unrolling, sliding or microwaving movements of the particles on inclined planes are excluded. This has the advantage that free-flowing products, regardless of the composition and the type, shape and size of the particles are passed through a treatment zone of the UV sources at a defined rate and in this way a homogeneous energy dose is applied to all particles.
  • the individual particles After or immediately after leaving the conveyor for product feed or when entering the product guide channel, the individual particles receive in a preferred embodiment, a pulse which leads to a rotational movement.
  • the axis of rotation of the particles preferably runs parallel to the longest extent of the UV sources.
  • This rotational movement is z. B. on the rolling on a slope, or a brush or roller-like device that transmits a rotation of the particles at the moment of leaving the conveyor.
  • the rotational movement maintains the particles during the stay in a product guide channel and during the action of UV radiation in the region of the treatment zone.
  • this has the advantage that the UV radiation acting on the particles from a preferred direction can reach the entire surface on the circumference of the particles and a further improvement of the homogeneity of the absorbed dose is achieved.
  • additional means for reflecting the UV radiation are provided for particular improvement of the homogeneity of the absorbed dose.
  • the cross section of the product guide channel is rectangular in a preferred embodiment.
  • the cross section has two opposite longer and two opposite shorter sides in the region of the effective zone of the UV sources.
  • the reduction of the cross-section is achieved by the two opposite longer sides approach each other with increasing fall path of the particles.
  • the two short sides are preferably parallel.
  • the product stream trickles down as a "transparent curtain", preferably in the middle, between the longer sides of the cross-section, preferably over its entire length.
  • Transparent curtain in this context means that the mutual covering of the falling particles, seen from the longer sides of Cross-section, as low as possible, while the particles advantageously have laterally as close to each other as possible a distance.
  • the gap width s between the two opposing longer sides of the product guide channel decreases continuously in the direction of the fall of the product stream in this embodiment, and is preferably designed so that the context
  • h is the distance traveled path of fall of the particles and k is a constant which is between 312 and 250 m 170 m 312th
  • Another preferred embodiment provides a ring-shaped gap, which also narrows with the fallen fall height.
  • the product feed takes place here above a center column, which is surrounded by the annular gap. Further preferably, the product feed takes place through the center column, for example by means of a screw conveyor.
  • the screw is equipped with an elastic edge or elastic bristles.
  • the particles are imparted with a rotational movement, which they maintain in the case. This takes place, for example, via an inlet section at the edge of the center column, over which the particles roll down and thereby get into rotational motion.
  • one or more UV sources are arranged laterally on the product guide channel. They are adapted in shape to the product guide channel and emit UV radiation preferably over the entire width of the product stream.
  • one or more linearly extended UV sources are used, which preferably extend with the longitudinal axis parallel to the longer sides of the cross section and perpendicular to the direction of fall.
  • the required UV radiation intensity can advantageously be adapted exactly to the velocity of the particles and the gas flow with a corresponding drop height h, whereby a constant dose is transmitted at each location.
  • the wavelength of the UV radiation is preferably in a range from 100 nm to 400 nm, particularly preferably in the range from 150 nm to 350 nm and very particularly preferably in the range from 180 nm to 260 nm. The energy of the UV radiation transmitted to the particle surface.
  • Radiation is preferably in a range of 100 J / m 2 to 2000 J / m 2 , more preferably in the range of 200 J / m 2 to 1600 J / m 2 and all particularly preferably in the range from 400 J / m 2 to 1500 J / m 2 .
  • Uncontrolled transverse and pendulum movements of individual particles, as they occur in known methods and devices are preferably reduced by reducing the friction on the product guide channel using fluidic means.
  • the method according to the invention thus makes it possible to combine the decisive advantages of cost-effective process control under the conditions below or above atmospheric pressure and with homogeneous transmission of the absorbed dose to any particle sizes and forms in the product stream with improved effectiveness of controlling microorganisms and insects. Since the process is not performed in a vacuum, eliminating the vacuum technical effort.
  • the UV source or sources preferably operate as doped and / or undoped low-pressure or medium-pressure radiators.
  • a further preferred embodiment provides for the use of UV sources based on light-emitting diodes which are arranged in the form of groups or arrays. The use of these UV light-emitting diode arrays considerably increases the cost-effectiveness of the method compared with known solutions.
  • the inventive method includes the described active gas guide within the product guide channel. Due to the speed of this continuously accelerated gas flow and the resulting increased dynamic pressure, the static pressure in the product guide channel is lowered.
  • the product guide channel is opened in the region of the passage of the UV radiation into the treatment zone of the product guide channel.
  • the opening or the openings are realized by a flat perforation of the channel wall or covered with a close-meshed gauze or a grid in a preferred embodiment.
  • gas preferably air
  • the inflowing gas is guided over the exit area of the UV radiation at the UV source, whereby a convective cooling is achieved.
  • the inflowing gas can be supported by means of a separate auxiliary blower.
  • An advantage of this cooling is that the bypass gas flow directed into the product guide channel keeps the perforated or grid-covered area through which the UV radiation is conducted into the treatment zone from deposits. This eliminates in this embodiment, the usual additional means of cooling gas production by means of blowers, which offers further economic benefits.
  • the active gas flow in the product guide channel and by the bypass gas flow into the channel causes a reduction in the friction between the particles of the product flow and the wall in this area. This can also be used for targeted friction reduction in other sections of the product guide channel.
  • the bypass gas flow is branched off as a partial flow from the circulated gas flow, which is moved by the gas delivery device.
  • the pressure engineering design ensures that the bypass gas flow occurs in the required amount.
  • An associated control is advantageously carried out by means of known devices (flaps, slides, etc.).
  • At least one pressure gauge is arranged in the product guide channel. More preferably, a plurality of pressure gauges are distributed over the height of the product guide channel.
  • the entire system is controlled by means of an electronic data processing device.
  • the pressure sensors and the other sensors advantageously also transmit the acquired data to the data processing device.
  • the transmission can be wireless or wired.
  • the data processing device then advantageously controls both the product flow by means of the conveying devices and the at least one UV source and the one or more gas conveying devices.
  • the adjustment of the process parameters is carried out in the case of seeds on the basis of morphological characteristics (seed coat thickness and density, position of the Embryos, seed type), in other products chemical or / and physical characteristics.
  • the necessary process conditions can be calculated. This is preferably done in the data processing device or in advance, wherein the necessary information is then entered into the data processing device before the start of the process.
  • a further preferred embodiment provides for arranging two or more UV sources.
  • they are arranged offset in height and the power adapted to the respective speed of the product stream.
  • a further advantageous variant is the opposite arrangement of the UV sources with rotation about the horizontal axis in the angular range of 5 ° to 45 °, so that the average intensity direction of the UV radiation to the velocity vector of the particle flow to this angle is different from the orthogonal.
  • This arrangement can also be chosen with staggered UV sources and allows high UV power to achieve high energy doses with improved uniformity of energy input to the particles of the product stream.
  • means for fire and explosion protection are provided.
  • radio detectors are used which do not respond to the wavelength of daylight and UV radiation.
  • the device according to the invention is suitable in addition to the use for disinfection or sterilization of seeds for other free-flowing products.
  • seeds for other free-flowing products.
  • pharmaceutical products such as tablets, granules, capsules, as well as food and feed in the form of bulk and powders of any kind, but also spices, crushed herbs and all kinds of contaminated free-flowing masses such. Soil, plastic waste (shredded), recyclates etc.
  • FIG. 1 shows a section through a device for disinfecting seeds with fluidically shaped product guide channel and gas blower, UV sources with exit window for UV radiation and protective grid and product feed with vibration conveyor, infrared source, device for non-contact measurement of the product surface temperature, metering device for hydrogen peroxide Solution, particle rotation device, product discharge and integrated UV protection device,
  • FIG. 2 shows a section through part of the device according to FIG. 1 in the region of the product guide channel with gas guide and bypass flow for keeping the grid free in the product guide channel and cooling the exit window for UV radiation
  • FIG. 3 shows a section through part of the device according to FIG. 1 in the area of the rotation device for the particles
  • FIG. 4 shows a section through a part of the device according to FIG. 1 in the region of the measuring device for determining the UV radiation density.
  • Fig. 1 the basic structure of the exemplary device with product guide channel 1 is shown, which has a continuously decreasing gap width in the fall direction of the seed particles 2a.
  • a suction line 3 connected to a gas blower 4, which promotes a continuous gas flow 5 to the outside.
  • a grid 6 is arranged at the inlet of the suction line 3.
  • an inflow 7 for supplying the gas stream 5.
  • the process gas air, carbon dioxide or nitrogen is used.
  • the defined in the direction of fall decreasing gap width of the product guide channel 1 causes a continuous acceleration of the gas 5a within the product guide channel 1 to the same extent as acting by gravity on the seed particles 2a acceleration.
  • the seed 2 is fed to the process via a buffer container 8.
  • a metering device (not shown), which limits the volume flow of the seed 2 to a defined extent.
  • the seed 2 reaches a vibratory conveyor 9, which causes a continuous feed and pre-singulation.
  • an infrared source 9a for heating the seed is arranged above the vibrating conveyor 9, an infrared source 9a for heating the seed is arranged.
  • the radiation power is adjusted as a function of the delivery rate of the vibrating conveyor 9 and the surface temperature of the seed is monitored by means of a contactless temperature measuring device 9b.
  • a spraying device 9c for the wetting of the seed with hydrogen peroxide solution is arranged downstream in the direction of transport. The amount of hydrogen peroxide solution is adjusted depending on the flow rate of the vibrating conveyor 9.
  • the vibration conveyor 9 has within the product guide channel 1 an angled segment 10 with a roughened surface to increase the friction.
  • a rotating brush roller 1 1 forms with the segment 10 an adjustable gap corresponding to the diameter of the seed particles 2a.
  • UV sources 12 are arranged on both sides of the product guide channel 1 .
  • the generated by the UV sources 12 flat UV beam 14 passes through the quartz glass existing exit window for the UV radiation 13 in the product guide channel 1 and moves to form a formed in representation level intensity profile 15 with a half width of about 50 mm in the direction the seed particle 2a.
  • the UV radiation 14 In the Z-axis, perpendicular to the plane of representation, the UV radiation 14 has a length of about 500 mm.
  • the UV radiation 14 acts diffusely and on all sides on the falling and rotating seed particles 2 a guided in the gas flow 5 a. After exposure to UV radiation 14 leaves the seed via a directly below arranged conveyor belt 16 the product guide channel.
  • the conveyor belt 16 is provided with a belt of high thermal conductivity which is cooled from the inside by cooling rollers 16a and cools the seed thereon in contact.
  • the UV sources 12 are arranged rotated about their longitudinal axis (Z axis), so that the main propagation direction of the UV radiation 14 and the associated thermal radiation is not at right angles to the direction of movement of the seed particles 2 a.
  • the respectively opposite UV source 12 is only limitedly detected by the heat radiation and even high UV power densities can not damage the respective opposite UV source.
  • measuring devices 17 for receiving a measurement signal dependent on the density distribution of the UV radiation and the transparency of the seed stream are arranged on the product guide channel 1.
  • An optical measuring system 18 allows the measurement of the density of the seed particles 2a and the detection of product jams.
  • the entire system is equipped with a protective covering 19, which prevents the escape of UV radiation into the environment, especially in the area of openings.
  • Fig. 2 is a section through a portion of the device of FIG. 1 with the right side of the product guide channel 1 and a UV source 12 is enlarged, but only schematically shown. This area is the effective zone of UV radiation in which the actual disinfection takes place.
  • the UV radiation 14 with the intensity distribution 15 is guided through the perforated region 1 a in the product guide channel 1 and acts on all sides on the rotating seed particles 2 a.
  • the static negative pressure generated by the gas flow 5a causes a gas flow 20, which is directed from the outside through the perforated region 1 a in the product guide channel 1 in and this keeps clear of impurities and particles.
  • a flow channel 21 causes the directed subsequent flow of air with parallel to the exit window for the UV radiation 13 pronounced preferred direction and its cooling by convection.
  • FIG. 3 shows an enlarged schematic section through a part of the device according to FIG. 1 with the rotation device for seed particles 2a.
  • the rotating brush roller 1 1 detects the seed particles 2a and puts them on the rough surface of the segment 10 of the vibratory conveyor 9 in a rotational movement. Grain size differences are compensated by the elastic bristles 11a, so that all seed particles 2a rotate after leaving the rotary device.
  • a measuring device 17 for determining the present in the z-axis to the display plane UV radiation density distribution 22 on the side of the exit window 13 arranged for the UV radiation, a measuring device 17 for determining the present in the z-axis to the display plane UV radiation density distribution 22. It consists of several UV sensors 23 positioned in the region of the edge radiation of the UV sources.

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  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

L'invention concerne un procédé de traitementde produits coulants composés de particules individualisables, de préférence de semences (2), au moyen de rayonnement ultraviolet (14). Selon le procédé, un flux de produit transparent est guidé dans un canal de guidage de produit (1) à travers un champ de rayonnement produit par au moins une source d'UV (12), dans des conditions de dépression ou de surpression, à l'aide de la gravité. Le guidage du flux de produit est réalisé au moyen d'un flux de gaz accéléré (5) de telle manière que son mouvement correspond en termes de valeur et de direction au mouvement accéléré que décrivent les particules tombant dans le flux de gaz sous l'effet de la gravité terrestre. L'invention concerne également un dispositif permettant l'accélération adéquate du flux de gaz (5) par la forme donnée au canal de guidage de produit (1).
EP13727125.0A 2012-06-04 2013-06-03 Procédé et dispositif de désinfection de produits coulants, de préférence de semences, au moyen de lumière ultraviolette (rayonnement uv) Withdrawn EP2854498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012209435A DE102012209435A1 (de) 2012-06-04 2012-06-04 Verfahren und Vorrichtung zur Desinfektion rieselfähiger Produkte, vorzugsweise Saatgut, mit Ultraviolettlicht (UV-Strahlung)
PCT/EP2013/061344 WO2013182504A1 (fr) 2012-06-04 2013-06-03 Procédé et dispositif de désinfection de produits coulants, de préférence de semences, au moyen de lumière ultraviolette (rayonnement uv)

Publications (1)

Publication Number Publication Date
EP2854498A1 true EP2854498A1 (fr) 2015-04-08

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Family Applications (1)

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EP13727125.0A Withdrawn EP2854498A1 (fr) 2012-06-04 2013-06-03 Procédé et dispositif de désinfection de produits coulants, de préférence de semences, au moyen de lumière ultraviolette (rayonnement uv)

Country Status (3)

Country Link
EP (1) EP2854498A1 (fr)
DE (1) DE102012209435A1 (fr)
WO (1) WO2013182504A1 (fr)

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