EP1117605A1 - Procede et dispositif de transport pneumatique de produits en vrac - Google Patents

Procede et dispositif de transport pneumatique de produits en vrac

Info

Publication number
EP1117605A1
EP1117605A1 EP00956329A EP00956329A EP1117605A1 EP 1117605 A1 EP1117605 A1 EP 1117605A1 EP 00956329 A EP00956329 A EP 00956329A EP 00956329 A EP00956329 A EP 00956329A EP 1117605 A1 EP1117605 A1 EP 1117605A1
Authority
EP
European Patent Office
Prior art keywords
internals
delivery line
bulk material
bulk
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00956329A
Other languages
German (de)
English (en)
Inventor
Robert Storf
Jochen Kniess
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coperion Waeschle GmbH and Co KG
Original Assignee
Coperion Waeschle GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE1999136134 external-priority patent/DE19936134C1/de
Priority claimed from DE2000102391 external-priority patent/DE10002391C1/de
Application filed by Coperion Waeschle GmbH and Co KG filed Critical Coperion Waeschle GmbH and Co KG
Publication of EP1117605A1 publication Critical patent/EP1117605A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/52—Adaptations of pipes or tubes
    • B65G53/525—Adaptations of pipes or tubes for conveyance in plug-form

Definitions

  • the invention relates to a method for the pneumatic conveyance of bulk material through a conveying line in the form of discrete bulk material plugs spaced apart from one another by gas cushions, in which the structure of the bulk material plugs is changed in the course of the conveyance, and to a device suitable for carrying out the method.
  • a generic method for the pneumatic slow conveyance is known from the document DE 195 03 383 C2.
  • the bulk material plugs conveyed through a first, horizontal line section that lengthen without further action during the conveyance are conveyed through a pipe extension with a subsequent siphon-like pipe section or a vessel with a vertical central axis and funnel-shaped bottom in which a continuously renewed part of the bulk material is deposited and discharged with a delay.
  • the cross section of the delivery line can be changed locally by a slide at the beginning of the vertical line section. In this way, the amount of compressed medium conveyed between successive bulk plugs and the length of the bulk plugs can be reduced in order to limit dynamic effects due to expansion of the conveying gas when the bulk plugs emerge from the delivery line.
  • the disadvantage of this method is the relatively bulky installations in the delivery line that are required for its implementation, which also increase the costs of the conveyor system.
  • Patent specification DE 1 143 754 discloses a conveying line for the pneumatic conveying of bulk material, which is provided with kink-like indentations located on its underside. These are designed so that they do not narrow the cross-section of the delivery line, so that the delivery speed in the area of the dent is not changed. They serve as deflectors, which prevent the bulk material from settling out of the essentially continuous flow and thus clogging of the delivery line during pneumatic flight conveyance.
  • a pneumatic delivery line with roughening internals is known, which should prevent the deposit of a strand of bulk material migrating along the bottom of the delivery line.
  • the internals are arranged at defined intervals and designed so that the bulk material is not retained on the bottom of the delivery line.
  • the pneumatic conveying does not take the form of discrete bulk material plugs which are spaced apart from one another by pads made of compressed gas.
  • the published patent application DE-OS 20 55 502 describes a pipeline for fluid substances or substance mixtures in a uniformly mixed state, the inner surface of which is provided with spiral projections.
  • the projections can be arranged continuously in the delivery line or locally interrupted.
  • the pumped fluid is rotated or rotated by the internals, so that the Flow rate can be reduced without deposits or segregation occurring in the delivery line.
  • Another delivery line with local constrictions is known from the document DE 1 001 186.
  • the pipeline intended for the pneumatic conveyance of dust-like goods is provided at regular intervals with ring-shaped internals which partially protrude into the projected line cross-section.
  • the rings reduce the flow velocity on the inner wall of the pipe, on which a closed jacket made of dust particles protects against wear.
  • pipelines are known from the prior art which are provided with internals spaced apart from one another in the flow direction.
  • these internals serve to prevent bulk deposits from an essentially continuous flow or wear on the inner tube wall.
  • the person skilled in the art does not receive any suggestion from the prior art to influence the formation of pneumatically conveyed plugs, in particular from granular bulk material, with such internals.
  • the object of the present invention is to reduce dynamic effects in a conveyor system for the pneumatic conveying of bulk material plugs with little construction effort.
  • the object is achieved in that the porosity of the bulk plug is at least locally increased by changing the relative speed between the bulk plug and the gas flowing through it.
  • This process not only reduces the plug density, but also increases its longitudinal deformability.
  • the local increase in the porosity of the bulk plug can be so great that the plug is divided into several individual plugs of shorter length.
  • a device suitable for carrying out the method according to the invention for the pneumatic conveying of bulk material in the form of discrete bulk material plugs spaced apart from one another by gas cushions comprises a feed device for the bulk material and a conveying line by means of which the bulk material can be conveyed pneumatically from a task location to a receiving container, the conveying line being a Many successive, in the direction of flow has internals spaced apart and projecting into the projected cross section of the delivery line.
  • the dynamic forces arising from the impact of the bulk material plug on the internals are negligibly small with a suitable structural design.
  • acceleration or deceleration of the conveying gas for example with substantially unchanged plug speed, or deceleration and re-acceleration of the bulk material plug, for example with essentially unchanged speed of the conveying gas, can be brought about.
  • the figures represent an example and schematically a device for carrying out the method according to the invention and suitable delivery lines.
  • Fig. 2 shows an enlarged section of the delivery line from Fig. 1 in longitudinal section and projection Fig. 3 shows a further claim 8 corresponding embodiment of the invention
  • FIG. 6 shows an enlarged section of the delivery line from FIG. 5 in longitudinal section and projection
  • Fig. 7 shows another embodiment corresponding to claim 14 of the invention
  • FIG. 10 shows a conveyor system according to claim 19 using the device from FIG. 9
  • the conveyor system shown in FIG. 1 comprises a storage container 1, from which granular bulk material is continuously fed into a conveyor line 3 by means of a cellular wheel sluice 2. Under the action of a compressed gas provided by a compressor 4, discrete bulk material plugs 5 are formed in the delivery line and are spaced apart from one another by gas cushions 6.
  • the delivery pressure in the area of the bulk material feed can be, for example, 3 to 6 bar.
  • the bulk material plugs 5 migrate horizontally through the delivery line 3 over a comparatively large distance in the direction of the destination 7, in the exemplary embodiment to a silo 8.
  • the conveyor line 3 is deflected into the vertical by a first pipe bend 9.
  • a second redirection into the horizontal through a second pipe bend 10 from which the bulk material is introduced into the desired silo 8 by means of a switch 11 or a further deflection piece 12.
  • the internals 14 shown by way of example in FIG. 1 are shown enlarged in FIG. 2. They consist of bulge-like indentations in the lower part of the delivery line 3, which are each spaced apart by a constant length L.
  • the length L is preferably 10 to 15 times the unrestricted diameter D of the delivery line 3 in the area of the internals 14.
  • the delivery line 3 in the segment 13 arranged upstream of the pipe bend 9 has a diameter D of 80 mm.
  • the distance between the internals 14 is about 1 m in this case.
  • the height H of the internals 14 also does not change, but is chosen uniformly in the segment 13 of the delivery line 3 shown so that the free cross section of the delivery line 3 is reduced by half in the relevant areas, as can be seen from the corresponding projection.
  • the conveying gas flowing through the bulk plug is periodically accelerated and decelerated in this area.
  • Such a delivery line is preferably used for the pneumatic delivery of hard, smooth granules.
  • FIG. 3 An alternative embodiment is shown in FIG. 3.
  • the internals 14 are designed like ramps, the distance Li to L 3 between the internals 14.1 to 14.4 decreasing in the direction of flow.
  • the height Hi to H 4 of the internals 14.1 to 14.4 increases successively, so that the free cross section in the respective line sections decreases. This procedure is recommended, for example, for the conveyance of bulk goods with rubber-elastic Behavior that can clog the delivery line if the line cross-section is abruptly reduced.
  • FIG. 4 An effect according to the invention is also achieved in an embodiment according to FIG. 4, in which a segment 13 of the conveying line 3 is substantially expanded and has a large number of successive internals 14, each narrowing the cross section of the conveying line 3 in the manner of an annular diaphragm.
  • Fig. 5 shows a conveyor system in which the internals 14 are designed pin-shaped. The precise design of the internals 14 can be seen from the enlarged illustration in FIG. 6.
  • the internals 14 consist of a number of pins 15 which extend radially from the wall 17 of the delivery line 3 to the center thereof and which are each combined into groups 16 spaced apart from one another by the distance L in the direction of delivery.
  • the pins 15 provided with an external thread are cylindrical and penetrate the wall 17 of the delivery line 3 in the region of bores 18, which in turn are provided with an internal thread.
  • the pins 15 projecting into the cross-section of the delivery line decelerate the bulk material plugs 5 without any significant influence on the flow of the feed gas, so that the relative speed between the bulk material plugs 5 and the feed gas flowing through them increases. This has a re- acceleration of the bulk material particles, which reduces the relative speed again. By repeating this process several times, the desired loosening of the bulk plug 5 is again brought about.
  • the distances L1 to L3 between the groups 16 of the internals 14 are shortened in the conveying direction (arrow X), the insertion depth and thus the part of the pins 15 protruding into the cross section of the conveying line 3, on the other hand, increases in Direction of arrow X. In this way, a particularly gentle retardation of the bulk plug 5 is effected without the pins themselves generating significant forces.
  • FIG. 8 shows an embodiment in which the radial fixation of the pins 15 in the delivery line 3 is brought about by means of clamping devices 20.
  • the clamping devices consist of outwardly projecting, cylindrical projections 21 of the delivery line 3, through which the pins 15 are guided.
  • the projections 21 are partially provided with slots 22 which can be narrowed by means of clamping screws 23, whereby the pins 15 are non-positively embraced by the projections 21.
  • the pins 15 are provided on the head side with pistons 24, which can each be moved radially under the effects of a pressure fluid in cylinders 25 connected to the delivery line 3.
  • the gaseous or liquid pressure fluid is supplied to the cylinder 25 in accordance with the desired direction of movement via pressure fluid connections 26, 26 ' .
  • the measured forces for the position control of the internals 14 can be, for example, the impact forces or plug speed measured when operating the conveyor system, as shown in FIG. 10.
  • the pins 15, the part of which projects into the cross section of the delivery line according to FIG. 9 and are variable in length, are connected via fluid lines 27 to a schematically illustrated sensor 28, which in turn is controlled by a control unit 29.
  • a sensor 30 measures the impact forces occurring in the area of the pipe bend 9 when the pouring plugs are deflected and changes the position of the transmitter 28 and thus also the position of the pins 15 by means of a stored control algorithm until the impact forces are reduced to a minimum.
  • the pins 15 can be pulled out of the delivery line 3, so that any thread-like impurities possibly present in the delivery flow are excluded. LIST OF REFERENCE NUMBERS

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Transport Of Granular Materials (AREA)

Abstract

L'invention concerne un procédé de transport pneumatique de produits en vrac à travers une conduite de transport (3), sous forme de gouttes discrètes de produits en vrac (5), maintenues à distance les unes des autres par matelas de gaz. Selon ce procédé, la structure des gouttes de produit en vrac est modifiée au cours du transport par réduction des forces dynamiques, du fait que la porosité de la goutte de produit en vrac est augmentée au moins localement par modification multiple de la vitesse relative entre les gouttes de produit en vrac et le gaz de transport qui les traverse. La conduite de transport présente à cet effet une pluralité de chicanes (14) successives, à distance les unes des autres dans le sens d'écoulement et faisant saillie dans la section transversale projetée de la conduite de transport, lesdites chicanes se présentant par exemple sous forme de bosses ou de broches.
EP00956329A 1999-07-31 2000-07-28 Procede et dispositif de transport pneumatique de produits en vrac Withdrawn EP1117605A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19936134 1999-07-31
DE1999136134 DE19936134C1 (de) 1999-07-31 1999-07-31 Verfahren und Vorrichtung zur pneumatischen Förderung von Schüttgut
DE10002391 2000-01-20
DE2000102391 DE10002391C1 (de) 2000-01-20 2000-01-20 Förderleitung für die pneumatische Langsamförderung von Schüttgut
PCT/EP2000/007273 WO2001009021A1 (fr) 1999-07-31 2000-07-28 Procede et dispositif de transport pneumatique de produits en vrac

Publications (1)

Publication Number Publication Date
EP1117605A1 true EP1117605A1 (fr) 2001-07-25

Family

ID=26003949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00956329A Withdrawn EP1117605A1 (fr) 1999-07-31 2000-07-28 Procede et dispositif de transport pneumatique de produits en vrac

Country Status (3)

Country Link
EP (1) EP1117605A1 (fr)
JP (1) JP2003506290A (fr)
WO (1) WO2001009021A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2669504A1 (fr) 2012-05-30 2013-12-04 Caterpillar Motoren GmbH & Co. KG Piston pour pompe à carburant de moteur à combustion interne
WO2013182213A1 (fr) 2012-06-05 2013-12-12 Caterpillar Motoren Gmbh & Co. Kg Composant de guidage de carburant

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0220814D0 (en) * 2002-09-09 2002-10-16 Aroussi Abdelwahab A generator of homogeneous mix of particulate laden flows in pipes
DE102012112246A1 (de) * 2012-12-13 2014-06-18 Erk Eckrohrkessel Gmbh Verbrennungsanlage, Verfahren und Einrichtung zur Erzeugung von Wärme und/oder elektrischer Energie sowie Verfahren zur Zuführung eines Gas-Feststoffgemisches in einem Verbrennungsprozess
CN104210850A (zh) * 2013-06-04 2014-12-17 宁夏嘉翔自控技术有限公司 小密度易碎颗粒物料气力输送系统
CN104555441A (zh) * 2013-10-20 2015-04-29 宁夏嘉翔自控技术有限公司 一种石灰石粉的双仓泵气力输送系统
KR101603525B1 (ko) * 2014-05-23 2016-03-15 우민기술(주) 원료 이송 및 적재 시스템
KR101603524B1 (ko) * 2014-05-23 2016-03-15 우민기술(주) 원료 이송장치
CN106429452A (zh) * 2016-12-21 2017-02-22 浙江智的智能装备技术有限公司 一种粉体助剂密相气力输送系统

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DE879973C (de) 1950-10-01 1953-06-18 Heinrich Schloz Verfahren zum Anbringen von Wirbeleinsaetzen in Foerderrohren
GB729880A (en) 1952-08-19 1955-05-11 Miag Muehlenbau & Ind Gmbh Pneumatic conveyor pipe line
DE1001186B (de) 1954-05-31 1957-01-17 Mannesmann Ag Rohr fuer die pneumatische Foerderung trockener staubfoermiger Gueter
DE1143754B (de) 1961-04-27 1963-02-14 Franz Jos Waeschle Maschinenfa Vorrichtung zur Verhinderung des Absetzens von Foerdergut in geradlinigen, horizontal oder fast horizontal verlaufenden Rohr-leitungen, bestehend aus in der Rohrleitung angeordneten rampenartigen Abweisern
FR1527587A (fr) * 1966-06-16 1968-05-31 Buehler Ag Geb Canalisation de transport de matériaux en gouttes
US3604759A (en) * 1969-09-23 1971-09-14 Shell Oil Co Partial obstruction arrangement for preventing plug formation in a shutdown slurry pipeline
BE758739A (fr) 1969-11-13 1971-04-16 Fuji Photo Film Co Ltd Procede et appareil en vue de transporter un fluide
CH587171A5 (fr) * 1975-07-09 1977-04-29 Nagel Heinrich
JPS5467983A (en) * 1977-11-10 1979-05-31 Komatsu Ltd Pneumatic conveyor for powder
DE68926820T2 (de) * 1988-04-01 1996-11-07 Kyowa Hakko Kogyo Kk Pneumatische Fördervorrichtung für verdichtete pulverförmige oder körnige Materialien
DE19503383C2 (de) 1995-02-02 1998-05-14 Waeschle Maschf Gmbh Verfahren zur stoßgeminderten pneumatischen Pfropfenförderung von Schüttgütern sowie Vorrichtung zur Durchführung des Verfahrens

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See references of WO0109021A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2669504A1 (fr) 2012-05-30 2013-12-04 Caterpillar Motoren GmbH & Co. KG Piston pour pompe à carburant de moteur à combustion interne
WO2013182213A1 (fr) 2012-06-05 2013-12-12 Caterpillar Motoren Gmbh & Co. Kg Composant de guidage de carburant

Also Published As

Publication number Publication date
JP2003506290A (ja) 2003-02-18
WO2001009021A1 (fr) 2001-02-08

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