EP2750808A1 - Dispositif et procede de separation de produits - Google Patents
Dispositif et procede de separation de produitsInfo
- Publication number
- EP2750808A1 EP2750808A1 EP12748424.4A EP12748424A EP2750808A1 EP 2750808 A1 EP2750808 A1 EP 2750808A1 EP 12748424 A EP12748424 A EP 12748424A EP 2750808 A1 EP2750808 A1 EP 2750808A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sieving
- products
- filtering
- filter element
- separation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 238000001914 filtration Methods 0.000 claims abstract description 82
- 238000000926 separation method Methods 0.000 claims abstract description 66
- 238000007873 sieving Methods 0.000 claims description 104
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- 230000009471 action Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/40—Resonant vibration screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/04—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size
Definitions
- the invention relates to the field of the separation of products in refusals and passers-by, whether it is sieving in the case of products in the form of powders or dry granules or filtration in the case of products in the form of fluids ( liquids and / or gases).
- the invention more particularly relates to a product separation device and an apparatus comprising one or more such devices, as well as a method of separating products using such an apparatus.
- a product separation apparatus or machine implements one or more separation devices each characterized on a given retention size.
- Each device comprises a structure supporting a filtering element or screening type wire mesh or grid or even electro-formed perforated sheet, and is mounted on a rigid frame. The separation of products is effected by moving the filter element or sieving relative to the products to be separated.
- the object of the present invention is to provide a product separation solution that overcomes the disadvantages listed above.
- a first object of the invention is to provide a product separation solution, by sieving or filtration, which ensures an optimum reproducible extraction rate in perfect adaptability.
- a second object of the invention is to provide a product separation solution, by sieving or filtration, silent, without mechanical movement and requiring simple adjustments, which allows continuous operation, that is to say without any need for specific operation to evacuate refusals and without internal retention zones of products.
- a third object of the invention is to provide a product separation solution, by sieving or filtration, for which the products to be separated are previously organized to feed the entire width of the filter element or sieving and whose only energy is provided by means of ultrasonic waves.
- a first aspect of the invention relates to a product separation device comprising a structure vibrated by an electroacoustic converter and supporting a filter element or sieving.
- the assembly is configured so that the separation of products passersby through the filter element or sieving and refusal results solely from ultrasonic vibrations of the filter element or sieving induced by the vibration of the structure by the converter Electroacoustic.
- the assembly can be configured so that the discharge of the refusals out of the filtering or sieving element results solely from the effect of gravity to allow separation of products and evacuation of continuous refusals without constituting zones of internal retentions of products.
- the device may comprise an input zone intended to be fed with products to be separated, the pre-distribution of which allows feeding in a continuous curtain over its entire width and an exit zone of the refusals after separation and to be configured so that the filtering or sieving element, under the effect of ultrasonic vibrations transmitted by the structure, generates a flow of the products being separated from the inlet zone to the exit zone by allowing passersby to pass through the filtering or sieving element during this flow.
- the entrance zone may be located at a height greater than that of the exit zone.
- the filtering or sieving element may be generally flat and inclined with respect to the horizontal, the inlet zone being provided near a high edge of the filter element or sieving and the exit zone being provided in the vicinity of a bottom edge of the filtering or sieving element, the direction of flow being oriented from the top edge to the bottom edge.
- the device may comprise an element for adjusting the inclination of the filter element or sieving in a given range of a few degrees, for example between 0 ° and 10 °, to adjust the flow velocity of the products in process. separation according to their ability to flow.
- the bonding surface at the outlet between the filtering or sieving element and the structure may be in a plane different from the the filter element or sieving, the edge of the exit zone may be on the same plane as the structure or 0.2 millimeters to a few millimeters below.
- the emission of ultrasonic vibrations to the structure can be performed in pulsed mode.
- the electroacoustic converter can be connected to the structure at the entrance area by means of fasteners.
- a second aspect of the invention relates to an apparatus comprising at least one product separation device as mentioned above secured to a rigid chassis by connecting elements, the apparatus comprising a feeding device for discharging products. to be separated on the filtering or sieving element from the separation device.
- the connecting elements between the separating device and the rigid chassis may comprise at least one seal, in particular integral with the structure of the separation device, interposed between the structure and a contact surface of the rigid chassis, and configured so that to absorb the ultrasonic vibrations of the structure without heating.
- the connecting elements between the separating device and the rigid chassis may comprise at least one clamping member, in particular a compression spring, configured to clamp the separating device against the contact surface of the rigid chassis by compressing the seal in a manner limiting or even avoiding the transmission of ultrasonic vibrations to the rigid chassis.
- a clamping member in particular a compression spring
- the feed device can ensure a spill of the products over the entire width of the filter element or sieving, especially in the form of a curtain of products of constant thickness.
- the apparatus may include an element for containing the discharged refusals out of the filtering or sieving element and / or a plurality of separating devices configured and superimposed on top of each other so as to have decreasing retention gauges going from above below, the products to be separated supplying a given separation device other than the most above being constituted by the loops of the separation device directly above.
- a third aspect of the invention relates to a method of separating products using an apparatus as mentioned above, comprising a step of separating the products by passers-by through the filtering or sieving element and refusals resulting solely from ultrasonic vibrations. of the filter element induced by the vibration of the structure by the electroacoustic converter.
- the product separation step can be carried out by flowing the products to be separated along the filtering or sieving element of the filtration device, with a dispersion of the constituents of the loops passing through the filter element or sieving according to a gradation gradient increasing in the direction of flow.
- FIG. 1 is a view from above of an example of a product separation device according to the invention
- FIG. 2 illustrates the section A-A of FIG. 1
- FIG. 1 illustrates a product separation device 10 comprising a structure 1 1 vibrated by an electroacoustic converter 12 and supporting a filtering or sieving element 13.
- the purpose of the device 10 is to constitute a screen in the case of sieving operations of powders or granules, or a filter in the case of filtration operations of a liquid or a gas.
- the filtering or sieving element 13 may be constituted by any suitable solution depending on the products to be separated, such as a fabric metal or a grid or a perforated sheet electroformed.
- all the elements constituting the device 1 0 are configured so that the separation of products passers-by through the filter element or sieving 1 3 and refusals results solely ultrasonic vibrations of the element filtering or screening 1 3 induced by the vibration of the structure 1 1 by the electroacoustic converter 1 2.
- the separation of the products is obtained without mechanical movement and without input of energy other than that corresponding to ultrasound.
- the structure 1 1 can be any, made from:
- the device 1 0 allows a natural and permanent evacuation of refusals and bystanders, freeing themselves from any need for spilling, scraping or brushing the filtering or sieving element 13.
- the device 10 comprises, for example, an inlet zone 14 intended to be fed with products to be separated beforehand organized to feed the entire width of the filtering or sieving surface and an outlet zone 15 for evacuating refusal after separation.
- the assembly is configured in such a way that the filtering or sieving element 13, under the effect of the ultrasonic vibrations transmitted by the structure 11 itself put into vibration by the converter 12, generates a flow of the products being separated from the inlet zone 14 to the exit zone 15 allowing the passers-by to pass through the filtering or sieving element 13 during this flow.
- the entry zone 14 may be located at a height greater than that of the exit zone 15 so that the flow is unidirectional as illustrated by the arrow 16 in FIG.
- the actual separation zone is interposed between the inlet and outlet zones 15, consisting of the filtering or sieving element 13. It is at the exit zone 15 that the refusals are permanently evacuated. and natural by the simple effect of gravity without constituting any area of internal retention of products.
- the transfer of ultrasonic vibration energy to the products to be screened or filtered is by shock or catapult effect.
- the effect of this energy transfer is to propel vertically (upwards or downwards) the majority of the product particles, which reach different heights according to their diameter, their mass, the diameter of the wire used. amplitude of the vibration and the frequency of ultrasonic vibration applied.
- the energy of a vibrating wire of the filtering or sieving element 13 depends on its mass and the square of its speed of displacement. The mass depends on the diameter of the wire, the son usually used having a diameter ranging from about 20 to 50 ⁇ , for example, a mass variation with a ratio of 1 to 6.25 per unit length.
- the particles to be separated have a variable diameter, for example ranging from 25 to 50 ⁇ , ie a mass variation with a ratio of 1 to 8.
- the finer filtering or sieving elements 13 intended for the separation of the smaller particles use son of smaller diameter, these finer particles therefore receive less and less energy except to significantly increase the amplitude of the vibrations applied to the wire.
- the vibration amplitude of the wire can not be increased without the risk of its breaking due to the stresses that could exceed the limit of elasticity of the material and friction at very high speed existing between the son. These frictions may cause very rapid wear of the threads or even a fusion.
- This energy transmitted to the products makes it possible to disperse and distribute the layer of products present on the surface of the filtering or sieving element 13 and thus to disengage its orifices to allow the passage of particles smaller than these orifices through the element 13. .
- this energy transmitted to the products allows a quasi-selection according to their diameter. Two particles expelled by the same wire at the same frequency and the same amplitude will reach different heights according to their size. For example, by doubling the diameter of a particle, its mass is increased by a ratio of eight. Its projection height is greater as well as the time required for its fall on the filter element or sieving 13, this time depending only on the height reached.
- a particle projected at 30 mm has a drop time of 0.07s, during which, for example, at 40 kHz, the filtering or sieving element 13 has vibrated 2800 times, making it possible to put a very large number of smaller particles moving.
- the frequency of vibrations up to 150 kHz while maintaining the same amplitude, a much larger number of particles are suspended per unit of time while giving smaller particles higher energy due to higher acceleration. transmitted.
- Increasing the frequency up to 150 kHz significantly increases the flow rate of the filtering or sieving element 13. The particles that are still in motion are less likely to pass through the filtering or sieving element 13. because of potential collisions with other particles and wires.
- the separation of the particles thus takes place essentially at the moment when the particles resting on the element or screen 13 are set in motion by the vibrations. Therefore, the emission of ultrasonic vibrations to the structure 1 1 is carried out in pulsed mode so that a cycle of rest and vibration is performed.
- the duration of the rest cycle is determined by the return time of the particle which has been projected the highest above the element 13. This time is of the order of 0.1 to 0.2s depending on the product to be separated, regardless of the frequency.
- the vibration time will be determined according to the nature of the product, the flow. For example, the vibration time may correspond to approximately three cycles associated with the particle expelled at the greatest distance from the element 13, ie of the order of 0.15 to 0.3s at 40 kHz, this time therefore being adapted according to the frequency.
- the filtering or sieving element 13 may adopt a generally flat arrangement inclined relative to the horizontal.
- the inlet zone 14 is provided near a top edge of the filtering or sieving element 13 and the outlet zone 15 is provided near a low edge of the filtering or sieving element 13, while the flow direction 16 is naturally oriented from the top edge to the bottom edge.
- the shape of the separating device 10 can in particular be of rectangular (as in FIG. 1), square, circular, oval or trapezoidal shape, or even of any geometrical shape which makes it possible to achieve the desired operation.
- the structure 1 1 made for example by machining a solid aluminum plate is rigid, consisting of cells 17 distributed so as to maintain the rigidity of the entire device 10 and in particular of the structure 1 1 and to allow an optimal transmission of the ultrasonic vibrations along the structure 1 1 from the converter 12. It comprises in particular at least three longitudinal bars 18 oriented in the direction of flow 16, interconnected with each other. along their length by a plurality of reinforcements 19.
- the side bar 20a is arranged at the high edge mentioned above in relation to the entry zone 14.
- the side bar 20b is arranged at the low edge mentioned above in relation to the exit zone 15.
- the lateral bars 20a, 20b each connect the ends of two bars 18, so as to close the frame of the structure.
- the distribution of the reinforcements 19 along the bars 18 is function the total dimension of the device 10 so as to maintain rectangular or square cells 17 adapted to the total dimension of the device 10.
- the cells 17 are symmetrical or asymmetrical according to the dimensions of the device 10.
- the reinforcements 19 may be machined in the mass, welded or screwed according to the determined construction.
- the reinforcing section 19 is for example triangular with the point facing upwards, but it may have any other form constituting an absence of inconvenience to the flow of products passing.
- the tip of the reinforcement section 19 is positioned in such a way that it never comes into contact with the filtering or sieving element 13.
- the section of the outer bars of the structure 1 is determined to obtain an optimal distribution of the ultrasonic vibrations as well as a sufficient surface to achieve the fixation (for example by gluing) of the filtering or sieving element 13 on the structure 1 1.
- This section may be square or rectangular or preferably slightly trapezoidal.
- the section of the side bar 20b on the outlet zone side 15 may be different to allow a non-flat attachment of the filtering element or sieve 13 on the structure 1 1.
- the bonding surface 25 at the exit zone 15 between the filtering or sieving element 13 and the structure 11 may be in a plane different from the plane of the filtering or sieving element 13 on the rest of the device 10.
- the angle formed between the fixing surface 25 (for example by gluing) relative to the plane of the remainder of the filter element or sieving 13 is between 1 to 90 °. This angle can be achieved in the entire width of the side bar 20b or on a part of this one, and consist of one or more sections.
- this edge of the exit zone possibly being on the same plane as the structure or from 0.2 millimeters to a few millimeters below so as to be on a plane equal to or less than the plane of gluing of the plane faces.
- the separation device 10 may comprise an adjustment element (not shown) of the inclination of the filter element or sieve 13 relative to the horizontal in a given range of a few degrees, for example between 0 ° and about 10 ° to adjust the flow rate of the products being separated in the direction 16 as a function of their ability to flow along the filtering or sieving element 13 (shape, weight, nature of the products) .
- the tilt adjustment element may be constituted by any suitable means, mechanical and / or electrical and / or manual.
- the flow of the products and the advance of the refusals along the device 10 is done simply by adjusting the slope of the device which will be higher at the input 14 of the products than at the exit 15 refusals.
- a particle projected orthogonally to a wire falls downstream from its point of departure.
- the repetition of the flights and falls provides a controlled flow to the exit zone 15 where the rejected particles fall for example into a recovery hopper without any movement or necessary mechanical action, simply under the effect of gravity .
- the adjustment of the slope is also a function of the flow observations of the products on the filtering or sieving element 13.
- the electroacoustic converter 12 is connected to the structure 11 at the entry zone. 14 thanks to fastening elements 21.
- the converter 12 itself powered by a generator not shown by means of a connecting cable 22, can be fixed in the center of the input zone 14 in the lateral direction orthogonal to the flow direction 16.
- fastening elements 21 tuned to the excitation frequency delivered by the converter 12.
- the length and shape of the fastening elements 21 can be chosen in half-wavelength of the frequency of 'excitation.
- the fastening elements 21 may for example adopt the shape of an extension bar which allows the tuning frequency.
- the converter 12 or the converter unit 12 / extension bar 21 is screwed to the structure 1 1 for example.
- the vibration frequency is in the field of power ultrasound, ie between about 20 and 150 kHz, for example.
- the filtering or sieving element 13 is bonded to the bars 18, 20a and 20b, this is done using a glue of the smallest possible thickness so that it has no role. in the damping of the ultrasonic vibrations and that it does not heat up under the action of the ultrasonic vibrations during the transmission of the structure 1 1 to the filtering or sieving element 13.
- the adhesive film between the filter element or sieving 13 and the structure 1 1 is marked 23.
- the transmission of ultrasonic vibrations to the filter element or sieving 13 depends in particular on the quality of the glue used and the quality of the uniform tension of the filter element or sieving 13 This tension must be 20 to 60 kg / cm 2, the reference value being around 40 kg / cm 2 in order to optimize the efficiency of the converter 12 and to allow a homogeneity of transmission speed of the vibrations in the structure 1 1 and the filtering or sieving element 13. However, it is important not to exceeding the elastic limit of the material constituting the filtering or sieving element 13.
- Each wire of the filtering or sieving element 13 when constituted by a wire cloth behaves like a tuned vibrating cord, the propagation of the vibrations being effected by a sinusoidal vibration of this wire.
- This own vibration of the wire subjected to a given frequency is completed by a lateral displacement at the same frequency due to the longitudinal vibration of the structure 1 1 completed by a longitudinal displacement at the same frequency due to the lateral vibration of the structure 11.
- These three kinds of synchronized and combined movements lead to a perfectly homogeneous vibration of the entire surface of the filtering or sieving element 13.
- the amplitude of the undulations is controlled by the generator which makes it possible to adjust the electric current delivered to the converter 12.
- the high voltage applied to each wire makes it possible to maintain a constant amplitude over the entire surface of the filtering or sieving element 13.
- Such a product separation device 10 has the advantage of being able to construct an apparatus or a machine comprising at least one such separation device 10 mounted integral with a rigid chassis by connecting elements (not shown), the apparatus also comprising a feed device for discharging products to be separated on the filtering or sieving element 13 of the filtering device. separation 10, especially at the input zone 14. It becomes advantageous to provide that the apparatus comprises several separation devices 10 configured and superimposed on top of each other so as to have decreasing retention gauges in going from top to bottom. In such a construction, the uppermost device 10 is directly powered by the feeder. For the devices 10 other than the one above, the products to separate feeding a given separation device 10 consists of the passers of the separating device 10 directly above.
- Each of the stages of the apparatus is therefore constituted by a separate separation device 10 which operates as described above.
- the major advantage lies in the possibility of superimposing the devices 10 with calibrated granulometry to make successive cuts without grouping the products or having to distribute them on each floor.
- the separation is done by stacking the devices 10 separated by the rigid chassis by putting the filter element of smaller size to the lower stage and the gauges being larger and larger from bottom to top.
- This device also makes it possible to adapt the size of the filtering or sieving elements to the relative flow rate that it must separate.
- a machine is fed at 100 kg per hour, the quantity of products arriving on the fourth lower device is only 5 kg per hour, it requires only a filter surface 50% smaller, the realization allows and to make a significant saving of filter element or sieving whose cost increases sharply when the retention size decreases from 25 ⁇ .
- the feed device may be configured to ensure a spill of the products over the entire width of the filtering element or sieve 13 of the device above the most, in particular in the form of a curtain of products of constant thickness.
- the spill may include, but is not limited to, continuous operation.
- the connecting elements between the separation device (s) 10 and the rigid chassis of the apparatus comprise at least one seal interposed between the structure 1 1 and a contact surface of the rigid chassis intended to support the structure 1 1.
- the seal is particularly integral with the structure 1 1 of the separation device 10, for example by gluing thereof, and its production is neat, which eliminates any friction and heating between the structure 1 1 and the seal while it gradually absorbs ultrasonic vibrations. It may be an elastomeric foam provided for this purpose.
- the seal is marked 24 in FIGS. 2 and 3.
- the contact surface of the frame which receives the device 10 may also be equipped with a seal of the same nature as the seal 24 integral with the device 10, for example glued on a metal flange. .
- a seal of the same nature as the seal 24 integral with the device 10 for example glued on a metal flange.
- these are selected for a great coefficient of friction at the interface between the two joints: there is drive of the movements of the joints of the rigid chassis (which is a structure obtained by boilermaking for example) by the joints 24 of the structure 1 1 without relative displacement.
- the final damping of the vibrations takes place before they reach the rigid chassis which, on the contrary, remains safe from any vibration and any heating.
- the connecting elements between the separation device (s) 10 and the rigid chassis of the apparatus also comprise at least one clamping member, in particular at least one compression spring, this member being configured to tighten the clamping device.
- each of the devices 10 is not animated by any movement and that the seal 24 is bonded to the structure 1 1 thereof, the clamping pressure can be minimized to maintain the seal without compressing the joints completely, which would change their behavior to the transmission of ultrasonic vibrations. Unsuitable seal quality or improper tightening may result in either product leakage or vibration transmission to the rigid frame as well as severe heating of the seals 24 and all or part of the device 10 in a noisy environment. harmonic frequencies developed.
- the apparatus may advantageously comprise an element for containing the discharged refusals out of the filtering or sieving element 13 at the end of the separation.
- the flow 16 of the rejected products constituting the refusals is contained for example by extensions screwed to the device (s) 10 in a sealed manner, these extensions being made of nylon® or Deirin® or any other material absorbing the ultrasonic vibrations without warming up.
- the fixing of these extensions is carried out for example by nylon screws which do not transmit any vibration.
- the step of separating the products (which results solely from ultrasonic vibrations of the element filtering or sieving 13 induced by the vibration of the structure 1 1 by the electroacoustic converter 12) is effected by flowing 16 of the products to be separated along its filtering or sieving element 13, with a dispersion of the products constituting passers-by passing through the filtering or sieving element 13 as a function of a gradation gradient increasing in the direction of flow 16.
- the thinnest of these pass through its filter element or sieving 13 from the first millimeters when the flow 16. Then gradually, it is increasingly larger products that flow and pass through the filter element or sifter 13.
- the exit zone 15 pass through the element 13 only passers who have dimensions very close to the retention size of the filter element or sieve 13.
- the passers-by recovered under the first device 10 are thus summarily classified and the passers-by recovered under the second and third third contain only very few powders smaller than the retention gauge of the second device 10 directly below, so it is not necessary that they traverse the entire length of the second device 10.
- This pre-selection allows a dispersion of loops on the lower device as a function of a grain size gradient.
- only the thinnest loops ie those passing through the first part of the first upper device
- This pre-selection makes it possible to reduce the quantity of particles present at the inlet of the apparatus, they are not congested by the presence of large particles which require only a very brief separation operation.
- This feature makes it possible to adjust the length necessary for separation to the product population: the smaller the products are compared to the retention size of the filtering or sieving element 13 of the upper device 10, the more they fall upstream of the element filtering or sieving 13 of the lower device 10 and are exposed to an intensification of the separation operation, due to the concomitant increase in the duration of the flow 16.
- This rain distribution over the entire surface of the lower device decreases. the layer thickness effect, increases the effectiveness of ultrasonic vibrations on the lower device and limits collisions between the particles.
- the separation step may advantageously comprise an adjustment of the flow length 16 of the products to be separated as a function of a desired upper threshold of granulometry of the loops.
- the apparatus is static and it is thus possible to determine perfectly what flow length 16 and therefore what length of filter element or sieving 13 is necessary to achieve the perfect granulometric limit passersby. To do this, it suffices to introduce from the exit zone 15, for example, a receiving plate which makes it possible to collect passers-by just below the lower device and to analyze their particle size zone by zone. If the filter element or sieving 13 has a retention size too large compared to the desired product, simply hide the downstream part which corresponds to the area where appear passers too big or too many.
- the apparatus thus described is compact, quiet, perfectly adaptable to the desired product and without any internal product retention zone.
- the settings are few: the slope of the device 10, the amplitude of the ultrasonic vibrations, the duration of the on and off times of the ultrasonic vibrations. It follows from the foregoing advantages and functions: the separation device or the apparatus is a machine without movement which allows a reproducible high extraction rate which uses only the energy of the ultrasounds,
- the operation is stable and reproducible thanks to a feed previously organized to be done according to a curtain controlled and adapted to the flow rate acceptable by the first filtering or sieving surface,
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1157625A FR2979262B1 (fr) | 2011-08-30 | 2011-08-30 | Dispositif et procede de separation de produits |
PCT/EP2012/065785 WO2013029972A1 (fr) | 2011-08-30 | 2012-08-13 | Dispositif et procede de separation de produits |
Publications (2)
Publication Number | Publication Date |
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EP2750808A1 true EP2750808A1 (fr) | 2014-07-09 |
EP2750808B1 EP2750808B1 (fr) | 2016-04-06 |
Family
ID=46704612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12748424.4A Active EP2750808B1 (fr) | 2011-08-30 | 2012-08-13 | Dispositif et procede de separation de produits |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2750808B1 (fr) |
FR (1) | FR2979262B1 (fr) |
WO (1) | WO2013029972A1 (fr) |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4062768A (en) * | 1972-11-14 | 1977-12-13 | Locker Industries Limited | Sieving of materials |
FR2671743B1 (fr) * | 1991-01-17 | 1993-06-18 | Duburque Dominique | Dispositif de mise en vibration ultrasonique d'une structure non accordee. |
JP3316032B2 (ja) | 1993-05-11 | 2002-08-19 | 日清製粉株式会社 | 粉粒体篩機用の篩枠 |
EP0652810B2 (fr) * | 1993-05-26 | 2002-07-03 | Telsonic Ag | Procede et dispositif de criblage, de triage, de separation, de filtrage ou de tamisage de substances |
JP4176226B2 (ja) | 1999-02-25 | 2008-11-05 | 日清製粉株式会社 | 粉粒体の篩い分け方法 |
DE10054089C1 (de) * | 2000-11-01 | 2002-07-18 | Hielscher Gmbh | Anordnung zur Anregung eines Siebrahmens mit Ultraschall |
GB2395923A (en) | 2002-12-02 | 2004-06-09 | Russel Finex | Sieving apparatus |
DE202005005847U1 (de) | 2005-04-12 | 2005-06-16 | Telsonic Holding Ag | Vorrichtung zum ultraschallunterstützten Sieben |
DE102005024854B3 (de) * | 2005-05-31 | 2006-09-14 | Dürr Systems GmbH | Beschichtungspulver-Siebeinrichtung |
DE102006047592C5 (de) * | 2006-10-05 | 2019-01-10 | Artech Systems Ag | Vorrichtung zur Anregung eines in einem Siebrahmen eingefassten Siebgewebes mittels Ultraschall |
US8113358B2 (en) | 2007-04-04 | 2012-02-14 | M-I Llc | Pre-tensioned sifter screen |
-
2011
- 2011-08-30 FR FR1157625A patent/FR2979262B1/fr not_active Expired - Fee Related
-
2012
- 2012-08-13 WO PCT/EP2012/065785 patent/WO2013029972A1/fr active Application Filing
- 2012-08-13 EP EP12748424.4A patent/EP2750808B1/fr active Active
Non-Patent Citations (1)
Title |
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See references of WO2013029972A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013029972A1 (fr) | 2013-03-07 |
EP2750808B1 (fr) | 2016-04-06 |
FR2979262B1 (fr) | 2013-09-13 |
FR2979262A1 (fr) | 2013-03-01 |
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