WO2001009021A1 - Method and device for pneumatically transporting bulk goods - Google Patents
Method and device for pneumatically transporting bulk goods Download PDFInfo
- Publication number
- WO2001009021A1 WO2001009021A1 PCT/EP2000/007273 EP0007273W WO0109021A1 WO 2001009021 A1 WO2001009021 A1 WO 2001009021A1 EP 0007273 W EP0007273 W EP 0007273W WO 0109021 A1 WO0109021 A1 WO 0109021A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- internals
- delivery line
- bulk material
- bulk
- line
- Prior art date
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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00956329A EP1117605A1 (en) | 1999-07-31 | 2000-07-28 | Method and device for pneumatically transporting bulk goods |
JP2001514229A JP2003506290A (en) | 1999-07-31 | 2000-07-28 | Method and apparatus for pneumatically transporting bulk material |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999136134 DE19936134C1 (en) | 1999-07-31 | 1999-07-31 | Pneumatic feed method for loose material has structure of discrete loose material quantities altered during their transport along feed line |
DE19936134.7 | 1999-07-31 | ||
DE10002391.6 | 2000-01-20 | ||
DE2000102391 DE10002391C1 (en) | 2000-01-20 | 2000-01-20 | Procedure to convey by pneumatic means bulk material along transporting line entails increasing porosity of slugs of bulk material by repeated changing of relative velocity between slugs and transporting gas flowing through them |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001009021A1 true WO2001009021A1 (en) | 2001-02-08 |
Family
ID=26003949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/007273 WO2001009021A1 (en) | 1999-07-31 | 2000-07-28 | Method and device for pneumatically transporting bulk goods |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1117605A1 (en) |
JP (1) | JP2003506290A (en) |
WO (1) | WO2001009021A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004022462A2 (en) * | 2002-09-09 | 2004-03-18 | Gaim Ltd | Flow homogeniser |
DE102012112246A1 (en) * | 2012-12-13 | 2014-06-18 | Erk Eckrohrkessel Gmbh | Combustion system e.g. fluidized bed combustion system for device for generating heat and/or electrical energy, has transport line that is formed in sections by line element whose inside is provided with several convex forming elements |
CN104210850A (en) * | 2013-06-04 | 2014-12-17 | 宁夏嘉翔自控技术有限公司 | Low-density fragile particle material pneumatic conveying system |
CN104555441A (en) * | 2013-10-20 | 2015-04-29 | 宁夏嘉翔自控技术有限公司 | Double-bunker pneumatic conveying system for limestone powder |
CN106429452A (en) * | 2016-12-21 | 2017-02-22 | 浙江智的智能装备技术有限公司 | Powder adjuvant dense-phrase pneumatic conveying system |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2669504A1 (en) | 2012-05-30 | 2013-12-04 | Caterpillar Motoren GmbH & Co. KG | Plunger for an internal combustion engine fuel pump |
WO2013182213A1 (en) | 2012-06-05 | 2013-12-12 | Caterpillar Motoren Gmbh & Co. Kg | Fuel guiding component |
KR101603524B1 (en) * | 2014-05-23 | 2016-03-15 | 우민기술(주) | Raw material transfer apparatus using aero-flow transfer tank |
KR101603525B1 (en) * | 2014-05-23 | 2016-03-15 | 우민기술(주) | Raw material transfer and loading system |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE879973C (en) | 1950-10-01 | 1953-06-18 | Heinrich Schloz | Method for attaching vortex inserts in conveyor pipes |
GB729880A (en) | 1952-08-19 | 1955-05-11 | Miag Muehlenbau & Ind Gmbh | Pneumatic conveyor pipe line |
DE1001186B (en) | 1954-05-31 | 1957-01-17 | Mannesmann Ag | Pipe for the pneumatic conveying of dry, dusty goods |
DE1143754B (en) | 1961-04-27 | 1963-02-14 | Franz Jos Waeschle Maschinenfa | Device to prevent the sedimentation of conveyed material in straight, horizontally or almost horizontally running pipes, consisting of ramp-like deflectors arranged in the pipe |
FR1527587A (en) * | 1966-06-16 | 1968-05-31 | Buehler Ag Geb | Pipeline for transporting drop material |
DE2055502A1 (en) | 1969-11-13 | 1971-05-19 | Fuji Photo Film Co Ltd , Kanagawa (Japan) | Method and device for transporting superplasticizers |
US3604759A (en) * | 1969-09-23 | 1971-09-14 | Shell Oil Co | Partial obstruction arrangement for preventing plug formation in a shutdown slurry pipeline |
CH587171A5 (en) * | 1975-07-09 | 1977-04-29 | Nagel Heinrich | |
JPS5467983A (en) * | 1977-11-10 | 1979-05-31 | Komatsu Ltd | Pneumatic conveyor for powder |
EP0455809A1 (en) * | 1988-04-01 | 1991-11-13 | Kyowa Hakko Kogyo Co., Ltd. | Apparatus for pneumatically transporting high-density powdered or granular materials |
DE19503383C2 (en) | 1995-02-02 | 1998-05-14 | Waeschle Maschf Gmbh | Process for the shock-reduced pneumatic plug conveying of bulk goods and device for carrying out the process |
-
2000
- 2000-07-28 EP EP00956329A patent/EP1117605A1/en not_active Withdrawn
- 2000-07-28 JP JP2001514229A patent/JP2003506290A/en active Pending
- 2000-07-28 WO PCT/EP2000/007273 patent/WO2001009021A1/en not_active Application Discontinuation
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE879973C (en) | 1950-10-01 | 1953-06-18 | Heinrich Schloz | Method for attaching vortex inserts in conveyor pipes |
GB729880A (en) | 1952-08-19 | 1955-05-11 | Miag Muehlenbau & Ind Gmbh | Pneumatic conveyor pipe line |
DE1001186B (en) | 1954-05-31 | 1957-01-17 | Mannesmann Ag | Pipe for the pneumatic conveying of dry, dusty goods |
DE1143754B (en) | 1961-04-27 | 1963-02-14 | Franz Jos Waeschle Maschinenfa | Device to prevent the sedimentation of conveyed material in straight, horizontally or almost horizontally running pipes, consisting of ramp-like deflectors arranged in the pipe |
FR1527587A (en) * | 1966-06-16 | 1968-05-31 | Buehler Ag Geb | Pipeline for transporting drop material |
US3604759A (en) * | 1969-09-23 | 1971-09-14 | Shell Oil Co | Partial obstruction arrangement for preventing plug formation in a shutdown slurry pipeline |
DE2055502A1 (en) | 1969-11-13 | 1971-05-19 | Fuji Photo Film Co Ltd , Kanagawa (Japan) | Method and device for transporting superplasticizers |
CH587171A5 (en) * | 1975-07-09 | 1977-04-29 | Nagel Heinrich | |
JPS5467983A (en) * | 1977-11-10 | 1979-05-31 | Komatsu Ltd | Pneumatic conveyor for powder |
EP0455809A1 (en) * | 1988-04-01 | 1991-11-13 | Kyowa Hakko Kogyo Co., Ltd. | Apparatus for pneumatically transporting high-density powdered or granular materials |
DE19503383C2 (en) | 1995-02-02 | 1998-05-14 | Waeschle Maschf Gmbh | Process for the shock-reduced pneumatic plug conveying of bulk goods and device for carrying out the process |
Non-Patent Citations (1)
Title |
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PATENT ABSTRACTS OF JAPAN vol. 003, no. 093 (M - 068) 8 August 1979 (1979-08-08) * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004022462A2 (en) * | 2002-09-09 | 2004-03-18 | Gaim Ltd | Flow homogeniser |
WO2004022462A3 (en) * | 2002-09-09 | 2004-06-24 | Gaim Ltd | Flow homogeniser |
GB2411135A (en) * | 2002-09-09 | 2005-08-24 | Gaim Ltd | Flow homogeniser |
GB2411135B (en) * | 2002-09-09 | 2006-06-28 | Gaim Ltd | Flow homogeniser |
DE102012112246A1 (en) * | 2012-12-13 | 2014-06-18 | Erk Eckrohrkessel Gmbh | Combustion system e.g. fluidized bed combustion system for device for generating heat and/or electrical energy, has transport line that is formed in sections by line element whose inside is provided with several convex forming elements |
CN104210850A (en) * | 2013-06-04 | 2014-12-17 | 宁夏嘉翔自控技术有限公司 | Low-density fragile particle material pneumatic conveying system |
CN104555441A (en) * | 2013-10-20 | 2015-04-29 | 宁夏嘉翔自控技术有限公司 | Double-bunker pneumatic conveying system for limestone powder |
CN106429452A (en) * | 2016-12-21 | 2017-02-22 | 浙江智的智能装备技术有限公司 | Powder adjuvant dense-phrase pneumatic conveying system |
Also Published As
Publication number | Publication date |
---|---|
JP2003506290A (en) | 2003-02-18 |
EP1117605A1 (en) | 2001-07-25 |
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