EP0982238B1 - Bulk bag for highly dispersed,air-containing solids and method for filling - Google Patents
Bulk bag for highly dispersed,air-containing solids and method for filling Download PDFInfo
- Publication number
- EP0982238B1 EP0982238B1 EP99115071A EP99115071A EP0982238B1 EP 0982238 B1 EP0982238 B1 EP 0982238B1 EP 99115071 A EP99115071 A EP 99115071A EP 99115071 A EP99115071 A EP 99115071A EP 0982238 B1 EP0982238 B1 EP 0982238B1
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- Prior art keywords
- filling
- air
- vacuum
- product
- drum
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- 238000000034 method Methods 0.000 title claims description 17
- 239000007787 solid Substances 0.000 title claims description 5
- 239000000428 dust Substances 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- -1 polyethylene Polymers 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 239000003570 air Substances 0.000 description 16
- 238000009423 ventilation Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 238000005054 agglomeration Methods 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005429 filling process Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000003405 preventing effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 229910021485 fumed silica Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/1612—Flexible intermediate bulk containers [FIBC]
- B65D88/1618—Flexible intermediate bulk containers [FIBC] double-walled or with linings
Definitions
- the invention relates to large containers for highly disperse, air-containing solids and a process for their Filling.
- HDK is due to its spatial, three-dimensional branch structure a product that has an extremely low tamped density from about 40 to 50 g / l. Furthermore, between the Company bulk density and the tamped density value according to DIN ISO 787/11 to distinguish. Due to its fine structure, HDK is in able to bind a lot of gas, for example air, which the product in a quasi-fluid state with about 20 to 30 g / l is added. This removable air portion escapes voluntarily only very slowly and not completely. In this fluid state, the dust problem is also increased, since the The agility of the HDK agglomeration rate is extremely high.
- gas for example air
- Free-flowing, highly disperse and high-air solids extremely low bulk density, such as HDK therefore mainly with the help of an outside one Vacuum placed in air-permeable bags.
- the filling time increases with increasing air content.
- the sacks consist of 3 to 4 layers of paper, with an additional one Position of the paper to block ingress of moisture can be laminated with polyethylene (PE).
- PE polyethylene
- To the one you want Air permeability when filling is all Microperforated layers. This has the advantage that the good when inserted into the sack is compressed and its Filling density increases compared to the natural bulk density.
- From EP-A 0 773 159 (US-A 5682929) is a method and a Container for repeated filling and emptying with loose material with low bulk density known.
- the one in it tissue container described, the so-called big bag or Super bag has a filling capacity of 90 to 350 kg.
- the tissue container consists of flexible, air-permeable Fabric, preferably a single or multi-layer plastic fabric, with at least one access opening. Filling this Tissue container is also done using Vacuum filling systems.
- the tissue container is included Vacuum applied and the good through the open Access opening sucked into the tissue container until a predetermined fill weight is reached. The gas comes out distributed over the entire surface of the tissue container.
- the goods are, similar to when filling in Sacks, reversibly compacted without losing its structure gets destroyed.
- the moisture barrier property is one of the main requirements for the wide use of these flexible large containers with everyone HDK types and areas of application.
- the invention relates to a flexible container, thereby characterized in that it consists of at least two one above the other lying layers, with an inner layer uncoated, air-permeable fabric, an outer Layer is dustproof and moisture-proof coated and this Layers with each other through a special seam design are connected that the venting of the container only by this is possible.
- the highly disperse, high-air content is pre-bound filling using a method according to the invention pre-vented. This pre-ventilation has the consequence that the Operating bulk density of the product before it is filled into the flexible container according to the invention is reduced without thereby a relevant influence on its spatial structure to take.
- This process is particularly suitable for packaging highly disperse high-air materials with extreme low bulk density of 20 to 150 g / l, such as the various modifications of the HDK.
- Particularly preferred are modifications of HDK that slightly damp out in their surroundings.
- the HDK is still airy. Under these conditions are the operating bulk density and the Degree of agglomeration low. Through the pre-venting step becomes the operating bulk density and thus the degree of agglomeration increased on the way from the storage silo to the filling template. In The filling process of the container can be done in this state shorten significantly, since not the entire ventilation of the Filling material during filling via the invention Seams of the container must be made.
- air-permeable partitions are used made of porous material, preferably sintered metal, fabric or Sintered plastics, gas from an applied vacuum Aspirated product.
- This suction process creates one Product layer on the filter medium that the suction process with increasing layer thickness or product thickness to a halt would bring. To avoid this, this product layer replaced by pressure pulses.
- the pressure impulses to release This layer carries significantly less gas into the system a than is suctioned off, so that the overall gas balance becomes one Ventilation leads.
- FIG. 1 shows the schematic representation of a device for pre-ventilation.
- the suction surface in the invention Process is divided into different segments so that one targeted venting can be set.
- About the Vacuum valve (3) is the gas from the silo bottom and the Pipe area over air-permeable partitions (6 and 7) sucked off porous material.
- the pulse cleaning takes place via the compressed air reservoirs (1) by means of the pulse cleaning valves (2). Cleaning with a pressure pulse can be done under vacuum or under normal pressure. In the latter case, the vacuum valve (3) is closed and after reaching atmospheric pressure Cleaning.
- the pre-vented material is then in the flexible large container according to the invention by means of known Vacuum filling system filled.
- the containers consist of at least two layers, preferably of flexible fabric.
- An inner layer (8) consists of an uncoated, air-permeable fabric.
- An outer layer (9) is coated in a dustproof and moisture-blocking manner, preferably with polypropylene and / or polyethylene. In contrast to the known large containers, in which the ventilation takes place over the entire surface during the filling process, in the containers according to the invention this can only take place via the special seam design (10) of the different layers.
- the Pre-vented HDK on an internal one during vacuum filling deposited uncoated layer (8) When filling the container according to the invention, the Pre-vented HDK on an internal one during vacuum filling deposited uncoated layer (8).
- increase in the degree of agglomeration by the Pre-venting and the low differential pressure is a possible dust penetration into the space between the uncoated, breathable layer and an outer, coated and thus dense layer (9), low.
- the aspirated gas is now between an inner and outer Layer passed to the special seams and vacuumed there.
- the layers of the flexible container are so together connected that one between each layer Strips made of air-permeable, filter-like material (11) is incorporated. Through these incorporated stripes, can on the one hand the gas is sucked off and on the other hand Dust particles held back by an inner uncoated layer (8) could escape.
- a filter strip can all known flexible filter materials, such as for example, felt strips made of natural or plastic fibers, Polyester or Teflon model felts, paper filters and / or Polypropylene wicks are used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
- Bag Frames (AREA)
- Packages (AREA)
- Laminated Bodies (AREA)
Description
Die Erfindung betrifft Großgebinde für hochdisperse, hochlufthaltige Feststoffe und ein Verfahren zu deren Befüllung.The invention relates to large containers for highly disperse, air-containing solids and a process for their Filling.
Der Umgang mit schüttfähigen, hochdispersen und hochlufthaltigen Feststoffen mit extrem niedriger Schüttdichte, wie beispielsweise hochdisperse Kieselsäure (HDK) bereitet in verschiedener Hinsicht Probleme. Sowohl die Hersteller als auch die Endverbraucher sind damit konfrontiert, daß solche Stoffe schon bei geringster Luftkonvektion Staub aufwirbeln. Die Staubentwicklung muß vermieden werden, um Personal, das mit dem Gut umgehen muß, vor eventuell auftretenden gesundheitlichen Schäden durch Einatmen des Staubs zu bewahren. Darüber hinaus verursacht die geringe Schüttdichte erhöhte Transportkosten, weil das Verhältnis Gebindegewicht zu Füllgewicht groß ist und entsprechend viel Verpackungsmaterial benötigt wird.Dealing with pourable, highly dispersed and air-containing solids with extremely low Bulk density, such as highly disperse silica (HDK) causes problems in various ways. Both the Manufacturers as well as end consumers are with it faced that such substances at the slightest Air convection stir up dust. The dust development must to be avoided by personnel who have to deal with the goods from possible health damage Preserve inhalation of the dust. In addition, the causes low bulk density increased transportation costs because that Ratio of container weight to filling weight is large and a corresponding amount of packaging material is required.
HDK ist aufgrund ihrer räumlichen, dreidimensionalen Ast-Struktur ein Produkt, das eine äußerst geringe Stampfdichte von etwa 40 bis 50 g/l aufweist. Weiterhin ist zwischen der Betriebsschüttdichte und dem Stampfdichtewert nach DIN ISO 787/11 zu unterscheiden. Durch seine Feinstruktur ist HDK in der Lage sehr viel Gas, beispielsweise Luft zu binden, wodurch das Produkt in einen quasi-fluiden Zustand mit etwa 20 bis 30 g/l versetzt wird. Dieser entfernbare Luftanteil entweicht freiwillig nur sehr langsam und nicht vollständig. In diesem fluiden Zustand ist auch die Staubproblematik erhöht, da die Beweglichkeit der HDK-Agglommerate extrem hoch ist.HDK is due to its spatial, three-dimensional branch structure a product that has an extremely low tamped density from about 40 to 50 g / l. Furthermore, between the Company bulk density and the tamped density value according to DIN ISO 787/11 to distinguish. Due to its fine structure, HDK is in able to bind a lot of gas, for example air, which the product in a quasi-fluid state with about 20 to 30 g / l is added. This removable air portion escapes voluntarily only very slowly and not completely. In this fluid state, the dust problem is also increased, since the The agility of the HDK agglomeration rate is extremely high.
In der Produktion bedeutet das, daß durch jeden Fördervorgang die HDK in diesen fluiden Zustand versetzt wird, der dann zwangsläufig das Abfüllen in Gebinde erschwert, da sich der spezifische Zeitaufwand pro Gebinde erhöht, was wiederum kapazitätsmindernd ist. In production this means that through every conveying process the HDK is placed in this fluid state, which then inevitably difficult to fill in containers, because the specific time expenditure per container increases, which in turn reduces capacity.
Schüttfähige, hochdisperse und hochlufthaltige Feststoffe mit extrem niedriger Schüttdichte, wie beispielsweise HDK, werden deshalb überwiegend mit Hilfe von einem außen angelegten Vakuum in luftdurchlässige Säcke eingebracht. Die Fülldauer steigt dabei mit zunehmender Lufthaltigkeit an. Die Säcke bestehen dabei aus 3 bis 4 Lagen Papier, wobei zusätzlich eine Lage des Papiers zur Sperrung von eindringender Feuchtigkeit mit Polyethylen (PE) kaschiert sein kann. Um die gewünschte Luftdurchlässigkeit beim Befüllen zu erreichen, sind alle Schichten mikroperforiert. Dies hat den Vorteil, daß das Gut beim Einbringen in den Sack komprimiert wird und seine Fülldichte gegenüber der natürlichen Schüttdichte ansteigt. Es besteht darüber hinaus die Möglichkeit durch spezielle Preßwalzen eine Vorentlüftung durchzuführen, wobei aber damit immer eine Strukturschädigung der HDK erfolgt, die die Verdickungseigenschaft, d.h. die Thixotropieeigenschaft, der pyrogenen Kieselsäure verringert.Free-flowing, highly disperse and high-air solids extremely low bulk density, such as HDK therefore mainly with the help of an outside one Vacuum placed in air-permeable bags. The filling time increases with increasing air content. The sacks consist of 3 to 4 layers of paper, with an additional one Position of the paper to block ingress of moisture can be laminated with polyethylene (PE). To the one you want Air permeability when filling is all Microperforated layers. This has the advantage that the good when inserted into the sack is compressed and its Filling density increases compared to the natural bulk density. There is also the option of special Press rolls to perform pre-ventilation, but with it there is always structural damage to the HDK, which the Thickening property, i.e. the thixotropy property, the fumed silica decreased.
Durch den höheren Anteil des Gutes am Gebindegewicht verringern sich die Transportkosten. Allerdings stehen dieser Kostenersparnis ein Mehraufwand für die Beschaffung der speziellen Säcke und der dazu benötigten Befüllanlage gegenüber.Due to the higher proportion of the goods in the container weight reduce transportation costs. However, these are available Cost savings an additional effort for the procurement of special sacks and the filling system required for this across from.
Die beschriebene Vakuumabfüllung in mehrlagige, zum Teil PE-kaschierte Papiersäcke ist heute allgemeiner Verpackungsstandard für sogenannte "fumed silica". Bei diesem Verfahren sind die Probleme hinsichtlich Luftdurchlässigkeit, Staubdichtigkeit, Gebindestabilität und Feuchtesperreigenschaften befriedigend gelöst. Bedingt durch ihre Beschaffenheit sind diese Papiersäcke nicht für große Füllmengen geeignet. Gängige Füllmengen für derartige Gebinde sind üblicherweise 10-20 kg.The described vacuum filling in multi-layer, partly PE-laminated Paper sacks are more common today Packaging standard for so-called "fumed silica". With this Procedures are the problems with air permeability, Dust tightness, container stability and Moisture barrier properties solved satisfactorily. Due the nature of these paper bags is not for large ones Filling quantities suitable. Common filling quantities for such containers are usually 10-20 kg.
Aus EP-A 0 773 159 (US-A 5682929) ist ein Verfahren und ein Behältnis zum mehrmaligen Befüllen und Entleeren mit schüttfähigem Gut mit geringer Schüttdichte bekannt. Der darin beschriebene Gewebekontainer, der sogenannte Big-Bag oder auch Super-Bag, besitzt dabei eine Füllkapazität von 90 bis 350 kg. Der Gewebecontainer besteht aus flexiblem, luftdurchlässigem Gewebe, bevorzugt ein ein- oder mehrlagiges Kunststoffgewebe, mit mindestens einer Zugangsöffnung. Die Befüllung dieser Gewebecontainer erfolgt ebenfalls mittels Vakuumabfüllsystemen. Dabei wird der Gewebecontainer mit Unterdruck beaufschlagt und das Gut durch die geöffnete Zugangsöffnung in den Gewebecontainer gesaugt, bis ein vorbestimmtes Füllgewicht erreicht ist. Das Gas tritt dabei verteilt über die gesamte Oberfläche des Gewebecontainers aus. Beim Befüllen wird das Gut, ähnlich wie beim Abfüllen in Säcken, reversibel verdichtet, ohne das seine Struktur dabei zerstört wird.From EP-A 0 773 159 (US-A 5682929) is a method and a Container for repeated filling and emptying with loose material with low bulk density known. The one in it tissue container described, the so-called big bag or Super bag, has a filling capacity of 90 to 350 kg. The tissue container consists of flexible, air-permeable Fabric, preferably a single or multi-layer plastic fabric, with at least one access opening. Filling this Tissue container is also done using Vacuum filling systems. The tissue container is included Vacuum applied and the good through the open Access opening sucked into the tissue container until a predetermined fill weight is reached. The gas comes out distributed over the entire surface of the tissue container. When filling, the goods are, similar to when filling in Sacks, reversibly compacted without losing its structure gets destroyed.
Die genannten Gebinde weisen jedoch eine Reihe von Nachteilen auf. Bei flexiblen Großgebinden kann nicht auf Papiersäcke zurückgegriffen werden, da diese einerseits nicht die erforderliche Festigkeit und Transportsicherheit erfüllen, und andererseits eine Mehrfachnutzung nicht möglich ist. Weiterhin stehen auch keine Fertigungsanlagen und Befüllvorrichtungen für diese Papiersackgrößen zur Verfügung.However, the containers mentioned have a number of disadvantages on. With flexible large containers it is not possible to use paper bags be used because on the one hand these are not the meet the required strength and transport security, and on the other hand, multiple use is not possible. Farther there are also no production facilities and filling devices available for these paper bag sizes.
Bei der Verwendung der marktüblichen flexiblen Großgebinde, beispielsweise aus Polypropylengewebe, können diese nur für den Transport von feuchtigkeitsunempfindlichen Füllstoffen verwendet werden, da die Feuchtesperreigenschaft der verwendeten Gewebe nicht ausreicht, um eine unzulässige Erhöhung des Feuchtegehalts der HDK zu verhindern.When using the commercially available flexible large containers, made of polypropylene, for example, can only be used for the transport of moisture-insensitive fillers be used because the moisture barrier property of used tissue is not sufficient to an impermissible To prevent an increase in the moisture content of the HDK.
Die Feuchtesperreigenschaft ist eine der Hauptvoraussetzungen für den breiten Einsatz dieser flexiblen Großgebinde bei allen HDK-Typen und HDK-Awendungsgebieten.The moisture barrier property is one of the main requirements for the wide use of these flexible large containers with everyone HDK types and areas of application.
Es bestand somit die Aufgabe flexible und mehrfach befüllbare Großgebinde bereitzustellen, die den geforderten Ansprüchen entsprechen. Dabei standen verschiedene Anforderungen im Vordergrund. Zum einen soll eine hohe Luftdurchlässigkeit gegeben sein, um eine hohe Füllgeschwindigkeit zu erreichen. The task was therefore flexible and refillable To provide large containers that meet the required requirements correspond. There were various requirements in the Foreground. Firstly, a high level of air permeability be given in order to achieve a high filling speed.
Weiterhin wird eine große Gebindestabilität und eine Staubdichtheit, während der Abfüllung, beim Transport und bei der Entleerung, verlangt. Zum anderen soll der flexible Großcontainer feuchtesperrend sein, d.h. es ist nur ein geringer Feuchteanstieg des Füllguts bei der Abfüllung und der Lagerung zulässig. Mit den bekannten Sackverpackungen und flexiblen Großgebinden, oder einer Kombination derer waren die genannten Vorgaben nicht befriedigend zu vereinen.Furthermore, a large container stability and a Dust tightness, during filling, during transport and at of emptying, asks. On the other hand, the flexible Large containers must be moisture-blocking, i.e. it is only one low moisture rise of the filling material during filling and Storage permitted. With the well-known sack packaging and flexible bulk containers, or a combination of those, were not satisfactorily combine the above-mentioned requirements.
Es wurde nun gefunden, daß durch die Kombination einer speziellen Ausführung des flexiblen Containers, der die Staubdichtheit und die Feuchtesperreigenschaft sicherstellt, und eines Verfahrens zur Vorentlüftung des hochdispersen, hochlufthaltigen Füllguts, was die für den Füllvorgang erforderliche Gasdurchlässigkeit des Gebindes bei gleichbleibender Abfüllkapazität minimiert, die oben erwähnten Vorzüge in sich vereint werden konnten.It has now been found that by combining a special design of the flexible container that the Ensures dust-tightness and moisture barrier properties, and a method for pre-venting the highly disperse, high-air contents, what the for the filling process required gas permeability of the container constant filling capacity minimized, the above mentioned Benefits could be combined.
Gegenstand der Erfindung ist ein flexibles Gebinde, dadurch gekennzeichnet, daß es aus mindestens zwei übereinander liegenden Lagen besteht, wobei eine innere Lage aus unbeschichteten, luftdurchlässigem Gewebe besteht, eine äußere Lage staubdicht und feuchtesperrend beschichtet ist und diese Lagen durch eine spezielle Nahtausführung so miteinander verbunden sind, daß die Entlüftung des Gebindes nur durch diese möglich ist.The invention relates to a flexible container, thereby characterized in that it consists of at least two one above the other lying layers, with an inner layer uncoated, air-permeable fabric, an outer Layer is dustproof and moisture-proof coated and this Layers with each other through a special seam design are connected that the venting of the container only by this is possible.
Da bei dem erfindungsgemäßen Gebinde die Entlüftung nur über die speziellen Nähte geschehen kann, und der Luftdurchsatz bei angelegtem Vakuum, wie er beispielsweise beim Befüllen auftritt, geringer ist als bei den bereits bekannten flexiblen Gebinden, wird das hochdisperse, hochlufthaltige Füllgut vor der Abfüllung noch mittels eines erfindungsgemäßen Verfahrens vorentlüftet. Diese Vorentlüftung hat zur Folge, daß die Betriebsschüttdichte des Füllguts vor dem Einfüllen in den erfindungsgemäßen flexiblen Container reduziert wird, ohne dabei einen relevanten Einfluß auf dessen räumliche Struktur zu nehmen. Since in the container according to the invention, the ventilation only the special seams can happen, and the air flow rate at applied vacuum, such as when filling occurs, is less than the already known flexible The highly disperse, high-air content is pre-bound filling using a method according to the invention pre-vented. This pre-ventilation has the consequence that the Operating bulk density of the product before it is filled into the flexible container according to the invention is reduced without thereby a relevant influence on its spatial structure to take.
Dieses Verfahren eignet sich besonders gut zum Verpacken von hochdispersen hochlufthaltigen Materialien mit äußerst geringer Schüttdichte von 20 bis 150 g/l, wie beispielsweise den verschiedenen Modifikationen der HDK. Besonders bevorzugt sind dabei Modifikationen von HDK die leicht Feuchtigkeit aus ihrer Umgebung aufnehmen können. Es ist besonders bevorzugt, Gewebecontainer mit einer Kapazität von 90 bis 350 kg Füllgewicht zu verwenden.This process is particularly suitable for packaging highly disperse high-air materials with extreme low bulk density of 20 to 150 g / l, such as the various modifications of the HDK. Particularly preferred are modifications of HDK that slightly damp out in their surroundings. It is particularly preferred Fabric container with a capacity of 90 to 350 kg Fill weight to use.
Unmittelbar nach der Befüllung des Vorlagesilos der Großcontainer-Füllanlage ist die HDK noch lufthaltig. Unter diesen Bedingungen sind die Betriebsschüttdichte und der Agglomerationsgrad gering. Durch den Vorentlüftungsschritt wird die Betriebsschüttdichte und damit der Agglomerationsgrad auf dem Weg vom Vorlagesilo in die Abfüllvorlage erhöht. In diesem Zustand läßt sich der Füllvorgang das Containers deutlich verkürzen, da nicht die gesamte Entlüftung des Füllmaterials während der Befüllung über die erfindungsgemäßen Nahtausführungen des Gebindes erfolgen muß.Immediately after filling the storage silo of the Large container filling system, the HDK is still airy. Under these conditions are the operating bulk density and the Degree of agglomeration low. Through the pre-venting step becomes the operating bulk density and thus the degree of agglomeration increased on the way from the storage silo to the filling template. In The filling process of the container can be done in this state shorten significantly, since not the entire ventilation of the Filling material during filling via the invention Seams of the container must be made.
Durch die Erhöhung des Agglomerationsgrades bei der Vorentlüftung verringert sich auch die Staubproblematik, da die entstandenen Agglomerate nicht mehr durch die Poren des Gewebematerials hindurch passen.By increasing the degree of agglomeration at Pre-ventilation also reduces the dust problem, since the resulting agglomerates no longer through the pores of the Fit fabric material through.
Bei der Vorentlüftung wird über luftdurchlässige Trennwände aus porösem Material, vorzugsweise Sintermetall, Gewebe oder Sinterkunststoffe, Gas über ein angelegtes Vakuum aus dem Produkt abgesaugt. Durch diesen Absaugvorgang bildet sich eine Produktschicht auf dem Filtermedium, die den Absaugvorgang mit zunehmender Schichtdicke oder Produktdicke zum Erliegen bringen würde. Um dies zu vermeiden, wird diese Produktschicht durch Druckimpulse wieder abgelöst. Die Druckimpulse zum Lösen dieser Schicht tragen dabei deutlich weniger Gas in das System ein, als abgesaugt wird, so daß die Gas-Gesamtbilanz zu einer Entlüftung führt. During pre-ventilation, air-permeable partitions are used made of porous material, preferably sintered metal, fabric or Sintered plastics, gas from an applied vacuum Aspirated product. This suction process creates one Product layer on the filter medium that the suction process with increasing layer thickness or product thickness to a halt would bring. To avoid this, this product layer replaced by pressure pulses. The pressure impulses to release This layer carries significantly less gas into the system a than is suctioned off, so that the overall gas balance becomes one Ventilation leads.
Die Erfindung wird nachfolgend mit Hilfe von Figuren in schematischer Darstellung näher erläutert.The invention is described below with the aid of figures in schematic representation explained in more detail.
Figur 1 zeigt die schematische Darstellung einer Vorrichtung zur Vorentlüftung. Die Absaugfläche im erfindungsgemäßen Verfahren wird in verschiedene Segmente unterteilt, damit eine gezieltes Entlüften eingestellt werden kann. Über das Vakuumventil (3) wird das Gas aus dem Siloboden und dem Rohrbereich über luftdurchlässige Trennwände (6 und 7) aus porösem Material abgesaugt. Die Impulsabreinigung erfolgt über die Druckluftreservoirs (1) mittels der Impuls-Abreinigungsventile (2). Die Abreinigung mittels Druckimpuls kann dabei unter Vakuum oder auch unter Normaldruck erfolgen. Im letzteren Fall wird das Vakuumventil (3) geschlossen und nach dem Erreichen des Atmosphärendrucks erfolgt die Abreinigung.Figure 1 shows the schematic representation of a device for pre-ventilation. The suction surface in the invention Process is divided into different segments so that one targeted venting can be set. About the Vacuum valve (3) is the gas from the silo bottom and the Pipe area over air-permeable partitions (6 and 7) sucked off porous material. The pulse cleaning takes place via the compressed air reservoirs (1) by means of the pulse cleaning valves (2). Cleaning with a pressure pulse can be done under vacuum or under normal pressure. In the latter case, the vacuum valve (3) is closed and after reaching atmospheric pressure Cleaning.
Durch intervallmäßiges, wechselseitiges Ansaugen und Abwerfen der verdichteten Produktschicht wird der Produkttransport vom Silo (4), in dem die HDK noch hochlufthaltig ist, in die Abfüllvorlage (5) für entlüftete HDK bewerkstelligt. Durch die räumliche Struktur der HDK bleibt ein einmal erreichter Verdichtungsgrad zu einem hohen Grad erhalten, sofern keine erneute mechanische Dispergierung erfolgt. Der Füllvorgang wird dadurch erheblich beschleunigt.Through intermittent, reciprocal suction and discharge the compressed product layer becomes the product transport from Silo (4), in which the HDK still contains high air, in the Filling template (5) for vented HDK accomplished. Through the The spatial structure of the HDK remains once it has been reached Obtain a high degree of compaction, if none mechanical dispersion takes place again. The filling process is accelerated considerably.
Das vorentlüftete Material wird anschließend in die erfindungsgemäßen flexiblen Großcontainer mittels bekannter Vakuumbefüllanlage abgefüllt.The pre-vented material is then in the flexible large container according to the invention by means of known Vacuum filling system filled.
Der schematische Aufbau der erfindungsgemäßen flexiblen Großgebinde ist in Figur 2 zur besseren Anschaulichkeit dargestellt.The schematic structure of the flexible according to the invention Large containers are shown in Figure 2 for better clarity shown.
Die Gebinde bestehen aus mindestens zwei Lagen, vorzugsweise
aus flexiblen Gewebe.
Eine innere Lage (8) besteht dabei aus einem unbeschichtetem,
luftdurchlässigem Gewebe. Eine äußere Lage (9) ist staubdicht
und feuchtesperrend beschichtet, vorzugsweise mit Polypropylen
und/oder Polyethylen. Im Gegensatz zu den bekannten
Großgebinden, bei denen die Entlüftung während des
Befüllvorgangs über die gesamte Oberfläche stattfindet, kann
diese bei den erfindungsgemäßen Gebinden nur über die
spezielle Nahtausführung (10) der unterschiedlichen Schichten
erfolgen.The containers consist of at least two layers, preferably of flexible fabric.
An inner layer (8) consists of an uncoated, air-permeable fabric. An outer layer (9) is coated in a dustproof and moisture-blocking manner, preferably with polypropylene and / or polyethylene. In contrast to the known large containers, in which the ventilation takes place over the entire surface during the filling process, in the containers according to the invention this can only take place via the special seam design (10) of the different layers.
Der Aufbau der speziellen Nahtausführung ist in Figur 3 schematisch dargestellt.The structure of the special seam design is shown in Figure 3 shown schematically.
Bei der Befüllung der erfindungsgemäßen Gebinde wird die vorentlüftete HDK während der Vakuumbefüllung an einer inneren unbeschichteten Lage (8) abgeschieden. Durch die bereits erwähnte Erhöhung des Agglomerationsgrades durch die Vorentlüftung und den niedrigen Differenzdruck ist ein möglicher Staubdurchtritt in den Zwischenraum der unbeschichteten, luftdurchlässigen Lage und einer äußeren, beschichteten und damit dichten Lage (9), gering. Das abgesaugte Gas wird nun zwischen einer inneren und äußeren Lage zu den speziellen Nähten geleitet und dort abgesaugt.When filling the container according to the invention, the Pre-vented HDK on an internal one during vacuum filling deposited uncoated layer (8). By already mentioned increase in the degree of agglomeration by the Pre-venting and the low differential pressure is a possible dust penetration into the space between the uncoated, breathable layer and an outer, coated and thus dense layer (9), low. The aspirated gas is now between an inner and outer Layer passed to the special seams and vacuumed there.
Die Lagen des flexiblen Gebindes sind dabei so miteinander verbunden, daß zwischen den einzelnen Lagen jeweils ein Streifen aus luftdurchlässigem, filterartigem Material (11) eingearbeitet wird. Durch diese eingearbeiteten Streifen, kann zum einen das Gas abgesaugt werden und zum anderen werden Staubpartikel zurückgehalten, die durch eine innere unbeschichtete Lage (8) entweichen konnten. Als Filterstreifen können dabei alle bekannten flexiblen Filtermaterialien, wie beispielsweise Filzstreifen aus Natur- oder Kunsstofffasern, Polyester- oder Teflonmodellfilze, Papierfilter und/oder Polypropylen-Dochte zum Einsatz kommen.The layers of the flexible container are so together connected that one between each layer Strips made of air-permeable, filter-like material (11) is incorporated. Through these incorporated stripes, can on the one hand the gas is sucked off and on the other hand Dust particles held back by an inner uncoated layer (8) could escape. As a filter strip can all known flexible filter materials, such as for example, felt strips made of natural or plastic fibers, Polyester or Teflon model felts, paper filters and / or Polypropylene wicks are used.
Die erfindungsgemäße Begrenzung der luftdurchlässigen Bereiche auf die Nähte stellt eine ausreichende Feuchtesperre zur Umgebungsluft dar.The inventive limitation of the air-permeable areas there is sufficient moisture barrier on the seams Ambient air.
Claims (9)
- Flexible large drum for high dispersion, high air content solids for repeated filling and emptying by means of vacuum filling plants, characterized in that it consists of at least two layers lying one above the other, an inner layer (8) consisting of uncoated air-permeable fabric, an outer layer (9) being coated so as to be dust tight and form a moisture barrier, and these layers being connected to one another by means of a special seam design (10), in such a way that it is possible for the drum to be deaerated solely through this seam design.
- Flexible large drum according to Claim 1, characterized in that an outer layer (9) is coated with polyethylene or polypropylene.
- Flexible large drum according to Claims 1 or 2, characterized in that, in the special seam design (10), an air-permeable dust-retaining filter material (11), preferably a felt strip or a wick made of polypropylene, is worked in.
- Method for filling flexible large drums according to one of Claims 1 to 3, characterized in that the filling material is predeaerated prior to filling and further deaeration via the seams of the drum is carried out during filling.
- Method according to Claim 4, characterized in that predeaeration takes place by means of a vacuum through air-permeable partitions made of porous material (6 and 7), preferably sintered metal, fabric or sintered plastics.
- Method according to Claims 4 and 5, characterized in that the cleaning of the porous partitions (6 and 7) and the associated transport of product take place as a result of the intermittent alternate suction and discharge of the compacted product layer, preferably by means of compressed air.
- Method according to Claims 4 to 6, characterized in that the intermittent control of the vacuum and of the compressed air is carried out by means of computer-controlled valves (2 and 3).
- Method according to Claims 4 to 7, characterized in that the filling product has a bulk density of 20 to 150 g/l and the filling weight is 90 to 350 kg.
- Method according to Claims 4 to 8, characterized in that the filling product is pyrogenically produced silicic acid or a modification thereof.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19839106 | 1998-08-27 | ||
| DE19839106A DE19839106A1 (en) | 1998-08-27 | 1998-08-27 | Large containers for highly disperse, high-air-containing solids and a process for filling them |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0982238A1 EP0982238A1 (en) | 2000-03-01 |
| EP0982238B1 true EP0982238B1 (en) | 2001-11-07 |
Family
ID=7878977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99115071A Expired - Lifetime EP0982238B1 (en) | 1998-08-27 | 1999-08-05 | Bulk bag for highly dispersed,air-containing solids and method for filling |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6199602B1 (en) |
| EP (1) | EP0982238B1 (en) |
| JP (1) | JP3325862B2 (en) |
| DE (2) | DE19839106A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10123885A1 (en) * | 2001-05-16 | 2002-12-12 | Bayer Ag | Process for filling moist, sticky bulk goods |
| US6860301B2 (en) | 2001-07-11 | 2005-03-01 | Degussa Ag | Apparatus and process for filling large containers of different sizes and shapes |
| CA2452775C (en) | 2001-07-11 | 2007-09-25 | Degussa Ag | Filling containers with granular or pulverulent material |
| DE102004003364A1 (en) * | 2004-01-22 | 2005-08-11 | Wacker-Chemie Gmbh | Device for transporting highly dispersed powders and process for their filling and emptying |
| ITRM20040472A1 (en) * | 2004-10-01 | 2005-01-01 | Stelliferi & Itavex S P A | PROCEDURE FOR THE PACKAGING OF PRODUCTS, FOR EXAMPLE FOR FOOD PRODUCTS, RELATED PACKAGING AND CONSTRUCTION EQUIPMENT. |
| DE202006019054U1 (en) * | 2006-12-18 | 2008-04-30 | Bischof + Klein Gmbh & Co. Kg | Packaging container in bag or sack form |
| US8297063B2 (en) * | 2008-08-12 | 2012-10-30 | General Electric Company | Method for servicing a refrigeration system |
| DE102009008984B4 (en) * | 2009-02-14 | 2016-09-29 | Empac GmbH | Flexible bulk material container |
| DE102009057246A1 (en) * | 2009-12-08 | 2011-06-09 | Haver & Boecker Ohg | Sack with membrane |
| WO2016022792A2 (en) * | 2014-08-07 | 2016-02-11 | Plank Road Technologies, Llc | System and method for preventing and controlling combustion and flammability, or oxidation of materials during storage or transport |
| KR101892218B1 (en) * | 2017-02-16 | 2018-08-28 | 영우산업 주식회사 | flexible intermediate bulk container |
| AT526155B1 (en) * | 2022-10-13 | 2023-12-15 | Div Trades D O O | Large volume packaging container |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3260285A (en) * | 1963-08-05 | 1966-07-12 | Clarence W Vogt | Apparatus and method for filling containers for pulverulent material |
| CA962021A (en) * | 1970-05-21 | 1975-02-04 | Robert W. Gore | Porous products and process therefor |
| US4229193A (en) * | 1978-09-19 | 1980-10-21 | Shop-Vac Corporation | Vacuum cleaner and sealed filter bag assembly therefor particularly useful for filtering asbestos fibers from air |
| US4735308A (en) * | 1985-04-17 | 1988-04-05 | Barner Juliane S | Compound food storage bag |
| US4946291A (en) * | 1987-01-02 | 1990-08-07 | Schnaars Daniel R | Semi-bulk with liner |
| US4996848A (en) * | 1989-09-28 | 1991-03-05 | Whirlpool Corporation | Method and apparatus for recovering refrigerants from home refrigeration systems |
| DE4009369A1 (en) | 1990-03-23 | 1991-09-26 | Celcommerz High Chem Produkte | Packing for powder or gaseous materials |
| GB9218970D0 (en) * | 1992-09-08 | 1992-10-21 | Mulox Ibc Ltd | Container bag |
| DE9307217U1 (en) * | 1993-05-12 | 1994-09-22 | Odenwald Chemie Gmbh | Double sterilization bag for infectious waste |
| KR100193465B1 (en) * | 1993-12-28 | 1999-06-15 | 가타야마 도루 | Packing Equipment |
| US5501525A (en) * | 1994-02-24 | 1996-03-26 | Winpak Films, Inc. | Bone-guard bag |
| US5647881A (en) * | 1995-04-20 | 1997-07-15 | Minnesota Mining And Manufacturing Company | Shock resistant high efficiency vacuum cleaner filter bag |
| DE19526743A1 (en) | 1995-07-21 | 1997-01-23 | Wacker Chemie Gmbh | Procedure for repeated filling and emptying of container with bulk material with low density |
| JP3078730B2 (en) * | 1995-08-24 | 2000-08-21 | ホソカワミクロン株式会社 | Volume reduction machine |
| DE59601648D1 (en) * | 1995-10-02 | 1999-05-20 | Korsnaes Wilhelmstal Gmbh Papi | Vented cross bottom valve sack |
-
1998
- 1998-08-27 DE DE19839106A patent/DE19839106A1/en not_active Withdrawn
-
1999
- 1999-08-05 DE DE59900398T patent/DE59900398D1/en not_active Expired - Lifetime
- 1999-08-05 EP EP99115071A patent/EP0982238B1/en not_active Expired - Lifetime
- 1999-08-24 JP JP23746399A patent/JP3325862B2/en not_active Expired - Lifetime
- 1999-08-26 US US09/383,676 patent/US6199602B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3325862B2 (en) | 2002-09-17 |
| US6199602B1 (en) | 2001-03-13 |
| DE59900398D1 (en) | 2001-12-13 |
| JP2000072154A (en) | 2000-03-07 |
| DE19839106A1 (en) | 2000-03-09 |
| EP0982238A1 (en) | 2000-03-01 |
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