EP1703239A2 - Vorrichtung zur schnelle und kontinuierliche Entfeuchtung von Schüttgut, insbesondere Granulat für eine Kunststoff-Formanlage. - Google Patents

Vorrichtung zur schnelle und kontinuierliche Entfeuchtung von Schüttgut, insbesondere Granulat für eine Kunststoff-Formanlage. Download PDF

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Publication number
EP1703239A2
EP1703239A2 EP06004205A EP06004205A EP1703239A2 EP 1703239 A2 EP1703239 A2 EP 1703239A2 EP 06004205 A EP06004205 A EP 06004205A EP 06004205 A EP06004205 A EP 06004205A EP 1703239 A2 EP1703239 A2 EP 1703239A2
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EP
European Patent Office
Prior art keywords
container
airflow
dehumidified
loose
pellet
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
Application number
EP06004205A
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English (en)
French (fr)
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EP1703239B1 (de
EP1703239A3 (de
Inventor
Amedeo Pagotto
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SMC TECHNOLOGY S.R.L.
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Smc Srl
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Publication of EP1703239A2 publication Critical patent/EP1703239A2/de
Publication of EP1703239A3 publication Critical patent/EP1703239A3/de
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Publication of EP1703239B1 publication Critical patent/EP1703239B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
    • 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
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • F26B3/092—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating
    • F26B3/0923—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed agitating the fluidised bed, e.g. by vibrating or pulsating by mechanical means, e.g. vibrated plate, stirrer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection

Definitions

  • This invention has as its object an apparatus for the fast dehumidification of loose materials.
  • the invention finds particular, though not exclusive, application in the field of the preliminary processing of plastic granules, pellets, to be used in successive procedures of moulding of plastic products.
  • the aim of the dehumidifiers is therefore that of constantly controlling the humidity percentage of the raw material used and intervening effectively with its dehumidifier functions, in order to feed the moulding plant with only the dried product, therefore optimized, maintaining a high quality of work.
  • a first type of dehumidifiers intervenes directly in the processing hopper, where on a case-by-case basis, the resin pellets, namely coloured or neutral plastic granules, are loaded.
  • a ventilation system is provided inside the hopper, allowing from one side the intake of an airflow, preferably constant and dry, and from the other the emission of air enriched with variable percentages of humidity.
  • Such forced circulation has the aim of progressively eliminating the percentage of noticeable humidity inside the hopper, without interrupting the operation cycle, allowing, meanwhile, the regeneration of means used for the dehumidification of the air introduced into the hopper.
  • To proceed with the ventilation of the processing hopper at present two lines are provided.
  • the plant Upon reaching a high rate of humidity, found inside the working tower by the two molecular sieves provided, the plant suspends the relative circulation, thereby activating the parallel line, in which previously a regenerating cycle had been carried out.
  • Such alternation of the cycles, once one tower, then the other, is necessary in order to allow, in the tower concemed with the suspension of the circulation of the airflow, the evaporation of the water held inside the molecular sieve, being of the type provided with a convenient heat exchanger.
  • a second version has been proposed.
  • the plant is equipped with a single turbine.
  • the aim of the single turbine is to allow the circulation of the airflow to be introduced into the processing hopper, conveniently allocated between the working tower, the one therefore which dehumidifies, and the regeneration tower.
  • a plant for a process of granule dehumidification is described, particularly plastic pellets, to be used in successive moulding procedures, including two means for the dehumidification of the air to be introduced inside a processing hopper provided in plastic moulding plants; said means, when saturated, being able, also alternatively, to accomplish a regeneration phase to be predisposed again to a dehumidification cycle of the air to be introduced inside the processing hopper, and in which a double-channel turbine is provided to feed the recirculation of the air with independent channels including distribution means of the air cycles, at least one of which for each regenerating dehumidification means.
  • Apparatus suitable to dehumidify, provided with devices that generate microwaves are certainly known.
  • JP703971 6 (Katayama ) an apparatus provided with channels is described, which are hit by a microwave beam, generated by a convenient device. Moreover a fan cooperates, which provides to introduce an airflow.
  • JP62277125 (Takusagawa ), describes an absorption tower, in which, for the regeneration of gas, the use of microwave devices is provided able to optimize the dehumidification process of thin and gaseous material.
  • US2004/0200090 suggests a drier for plastic, on the inside of which, in a corresponding container, a magnetic control tube is provided.
  • the magnetic control tube is connected to a connecting tube which is provided, at one end, with an air filter, and at the other connected to a ventilation nozzle.
  • the dried plastic is used by an apparatus for injection moulding.
  • JP4080005 (Nakagome ) describes an apparatus for the moulding of plastic, in which a high pressure dehumidifier is provided.
  • the hopper of a drier is provided with a dehumidifier that supplies air at high pressure, dehumidified in such a way that the pellets that are introduced into the drier are dehumidified by a hot airflow.
  • An apparatus for moulding integrates said drier-dehumidifier.
  • JP63231908 proposes a drier for plastic pellets.
  • the pellets feed a drying cylinder where a microwave generator and an aspirator operate.
  • the condensation generated and evaporated inside the drying cylinder is extracted by the aspirator.
  • JP63216711 (Nakagome ) provides an apparatus like the previous positioned upstream of a line for the moulding of plastic products.
  • JP63231909 (Nakagome ) finally provides a drying apparatus that concerns pellets which feed a drying cylinder where a microwave generator and an aspirator operate. The condensation generated and evaporated in the drying cylinder is extracted by the aspirator. Inside the cylinder dehumidified air is supplied, the air which was once enriched with humidity is dehumidified and reintroduced inside the drying cylinder.
  • the aforementioned apparatus do not seem to allow a uniform processing of the pellet, this is because the pellet is substantially static during the processing cycle, and follows a descending path.
  • the pellet stays in an amassed condition inside a hopper/container, during which it is processed, to be subsequently removed by gravity. This would involve particularly long processing times and the impossibility to obtain continuous processing cycles able to adequately supply the downstream moulding plant. In any case the installation would not be suitable for the processing of a quantity of pellets.
  • the aim of this invention is also to avoid the abovementioned disadvantages.
  • a first aim has been that of finding an extremely functional and versatile apparatus, able to offer comprehensive high performance, and in particular to reach below the common threshold of 1% of residual humidity in processed material, qualitatively improving definitively what will then constitute the finished product.
  • This result has also been achieved above all with reference to the fact that the pellet, thanks to the presence of the fluidized bed and mixer along the second container, subjected to the air jet at a controlled temperature, remains in a floating condition, which facilitates a uniform processing of the single particles.
  • a second aim has been that of allowing continuous processing cycles of the pellet, a circumstance that repeats by the fact of interconnecting a first container like a charging hopper, to a second container orthogonal to the first where the processing cycle of the pellet is performed, continuously ensuring a more correct and constant feeding of the possible downstream moulding plant.
  • a third aim was that of providing an apparatus able to considerably reduce the conventional dehumidification times of the pellet.
  • a third aim has been that of obtaining a less complex apparatus with respect to previous ones with a considerably reduced encumbrance and little maintenance.
  • Figure 1 represents a side-view of the apparatus for the fast and continuous dehumidification of loose materials, the object of this invention.
  • an apparatus A is observed, to dehumidify the loose material M, in particular pellets for the plastic moulding process by means of a possible apparatus positioned downstream of said apparatus A therefore suitable to receive the material M at the end of the processing cycle.
  • the apparatus A is essentially made up of two containers, respectively 1 and 2, which are intercommunicating. More particularly, the first container 1 is substantially a conical shaped container, in particular a vertical hopper, of the heated type, provided with a charge intake 100, and a discharge nozzle 101 of the loose material M, which introduces inside said second container 2 orthogonal with respect to said first container 1 and therefore placed horizontally. On the first container 1, sensors 10 2, 1 03 are provided which are of the tensioned type to indicate the level of loose material M present inside the container 1 and the relative humidity percentage and/or the present temperature inside said first container 1.
  • the second container 2 which is intercommunicating with said first 1, consists of a cylindrical body inside which a main chamber S is obtained for the processing of the material M.
  • a mixer/advancement means of the material M is present, in this case an auger 3, whose propeller is developed longitudinally and is integral to a support shaft whose ends, 3 0 and 31 are engaged, respectively, at the head 20, and at a ratio motor assembly 4 at the opposite side, for the rotating movement of the auger 3.
  • microwave generator devices 5 and 6, in particular magnetrons are aligned and placed spaced apart on the side of container 1, in such a way to direct their action towards the underlying main chamber S of the second container 2.
  • a discharge nozzle 21 of the loose material M is obtained, intercepted downstream by at least one humidity and/or temperature and/or weight sensor 2 2, that precedes a valve supplying a predetermined quantity 23.
  • a sintered sheet 7 is present underneath which is obtained an airspace 8 for the distribution of an airflow at a controlled dehumidified temperature, coming from an underlying heating chamber 9 with which it is in intercommunication by at least one intake 90.
  • electric resistance means 91 are provided, which provide the heating of the dehumidified air introduced inside the same through an intake 92 and upstream of which a pump group is operative (not shown).
  • the apparatus A is also provided with a recovery system of the airflow at a controlled temperature which is introduced inside the main chamber S in such a way that said airflow enriched with humidity, is to be extracted (by means of the aspiration assembly) from said main chamber S and therefore started through a circuit that allows the dehumidification (not shown) to then be reintroduced again through the intake 92 inside the heating chamber 9.
  • the apparatus A can be placed in such a way as to feed a plastic moulding plant, alternatively to allow the packaging of the loose material M and its following storage in surroundings suitable for that purpose.
EP06004205.8A 2005-03-15 2006-03-02 Vorrichtung zur schnellen und kontinuierlichen Entfeuchtung von Schüttgut, insbesondere Granulat für eine Kunststoff-Formanlage. Active EP1703239B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTV20050041 ITTV20050041A1 (it) 2005-03-15 2005-03-15 Apparecchiatura per la deumidificazione rapida e continua di materiali sfusi particolarmente del pellet per impianto di stampaggio di materiali plastici.

Publications (3)

Publication Number Publication Date
EP1703239A2 true EP1703239A2 (de) 2006-09-20
EP1703239A3 EP1703239A3 (de) 2011-10-26
EP1703239B1 EP1703239B1 (de) 2015-05-27

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EP06004205.8A Active EP1703239B1 (de) 2005-03-15 2006-03-02 Vorrichtung zur schnellen und kontinuierlichen Entfeuchtung von Schüttgut, insbesondere Granulat für eine Kunststoff-Formanlage.

Country Status (2)

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EP (1) EP1703239B1 (de)
IT (1) ITTV20050041A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102261822A (zh) * 2011-05-19 2011-11-30 湖南科达粉体工程有限公司 一种微波流化干燥褐煤的装置
ITTV20110050A1 (it) * 2011-04-13 2012-10-14 Smc Technology Srl Apparecchiatura essiccatore, deumidificatore, a sviluppo verticale del tipo a microonde per l essiccazione rapida e continua di materiale plastico in granuli, pellet o scaglie per l alimentazione d un impianto di stampaggio ad iniezione od estrusione
WO2013002625A2 (fr) * 2011-06-27 2013-01-03 Universite Sidi Mohamed Ben Abdellah Séchoir à lit fluidisé à vis d'archimède
WO2015085388A1 (pt) * 2013-12-10 2015-06-18 Prestes Junior Merlino Processo e equipamento para secagem de resíduos urbanos, industriais e de saúde e transformação em combustível para caldeiras e fornalhas industriais
CN106017042A (zh) * 2016-07-01 2016-10-12 王艳梅 一种化肥生产用螺旋干燥装置
JP2020525307A (ja) * 2017-06-19 2020-08-27 コストルツィオーニ メッカニケ ルイギ バンデラ エス．ピー．エー． 食品と接触する用途のプラスチック材料の精製用の装置及びプロセス
CN114670365A (zh) * 2020-12-24 2022-06-28 财团法人精密机械研究发展中心 微波烘料装置与智能化微波烘料系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112325620B (zh) * 2020-11-13 2022-04-19 南阳中联水泥有限公司 一种水泥生产高效烘干设备

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62277125A (ja) 1986-05-23 1987-12-02 Kobe Steel Ltd 脱湿装置における吸着剤の再生方法およびその装置
JPS63216711A (ja) 1987-03-05 1988-09-09 Matsuji Nakagome プラスチツクペレツトの乾燥装置
JPS63231908A (ja) 1987-03-20 1988-09-28 Matsuji Nakagome プラスチツクペレツトの乾燥装置
JPS63231909A (ja) 1987-03-20 1988-09-28 Matsuji Nakagome プラスチツクペレツトの乾燥装置
EP0345020A2 (de) 1988-05-31 1989-12-06 Kawata Co., Ltd Vorrichtung zum Trocknen und Kristallisieren von Granulat
JPH0480005B2 (de) 1985-03-19 1992-12-17 Teijin Ltd
JPH0739716A (ja) 1993-07-27 1995-02-10 Mic Intanashiyonaru Kk 除湿装置
US20040200090A1 (en) 2003-04-14 2004-10-14 Jia Horng Technology Corp. Plastic dryer

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
US4330946A (en) * 1980-09-23 1982-05-25 Ralph S. Tillitt High efficiency material drying
FR2600759B1 (fr) * 1986-06-30 1989-07-13 Electricite De France Four de traitement en continu de materiau pulverulent, granuleux ou pateux
JPH0714795Y2 (ja) * 1991-10-04 1995-04-10 株式会社松井製作所 粉粒体の乾燥装置
US6189234B1 (en) * 1998-04-08 2001-02-20 International Technology Systems, Inc. Continuous flow fluid bed dryer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0480005B2 (de) 1985-03-19 1992-12-17 Teijin Ltd
JPS62277125A (ja) 1986-05-23 1987-12-02 Kobe Steel Ltd 脱湿装置における吸着剤の再生方法およびその装置
JPS63216711A (ja) 1987-03-05 1988-09-09 Matsuji Nakagome プラスチツクペレツトの乾燥装置
JPS63231908A (ja) 1987-03-20 1988-09-28 Matsuji Nakagome プラスチツクペレツトの乾燥装置
JPS63231909A (ja) 1987-03-20 1988-09-28 Matsuji Nakagome プラスチツクペレツトの乾燥装置
EP0345020A2 (de) 1988-05-31 1989-12-06 Kawata Co., Ltd Vorrichtung zum Trocknen und Kristallisieren von Granulat
JPH0739716A (ja) 1993-07-27 1995-02-10 Mic Intanashiyonaru Kk 除湿装置
US20040200090A1 (en) 2003-04-14 2004-10-14 Jia Horng Technology Corp. Plastic dryer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20110050A1 (it) * 2011-04-13 2012-10-14 Smc Technology Srl Apparecchiatura essiccatore, deumidificatore, a sviluppo verticale del tipo a microonde per l essiccazione rapida e continua di materiale plastico in granuli, pellet o scaglie per l alimentazione d un impianto di stampaggio ad iniezione od estrusione
EP2511635A1 (de) * 2011-04-13 2012-10-17 Smc Technology S.R.L. Trocknungs-, Entfeuchtungsvorrichtung des Mikrowellentyps für schnelles und ununterbrochenes Trocknen von Kunststoffmaterial, z.B. Granulate, Pellets oder Flocken zum Beschicken eines Einspritz- oder Extrudierformsystems
CN102261822A (zh) * 2011-05-19 2011-11-30 湖南科达粉体工程有限公司 一种微波流化干燥褐煤的装置
WO2013002625A2 (fr) * 2011-06-27 2013-01-03 Universite Sidi Mohamed Ben Abdellah Séchoir à lit fluidisé à vis d'archimède
WO2013002625A3 (fr) * 2011-06-27 2014-05-08 Universite Sidi Mohamed Ben Abdellah Séchoir à lit fluidisé à vis d'archimède
WO2015085388A1 (pt) * 2013-12-10 2015-06-18 Prestes Junior Merlino Processo e equipamento para secagem de resíduos urbanos, industriais e de saúde e transformação em combustível para caldeiras e fornalhas industriais
CN106017042A (zh) * 2016-07-01 2016-10-12 王艳梅 一种化肥生产用螺旋干燥装置
JP2020525307A (ja) * 2017-06-19 2020-08-27 コストルツィオーニ メッカニケ ルイギ バンデラ エス．ピー．エー． 食品と接触する用途のプラスチック材料の精製用の装置及びプロセス
US11673293B2 (en) 2017-06-19 2023-06-13 Costruzioni Meccaniche Luigi Bandera S.P.A. Apparatus for purification of plastic material intended for food contact
CN114670365A (zh) * 2020-12-24 2022-06-28 财团法人精密机械研究发展中心 微波烘料装置与智能化微波烘料系统

Also Published As

Publication number Publication date
EP1703239B1 (de) 2015-05-27
ITTV20050041A1 (it) 2006-09-16
EP1703239A3 (de) 2011-10-26

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